Interference mitigation for wireless communications

Abstract

Various aspects relate to techniques for mitigating wireless communication interference. For example, one or more of a cyclic prefix length, a subcarrier spacing, a beam pair, or a frequency domain separation may be changed to mitigate the effects of inter-symbol interference (ISI) at a UE or a base station. The UE may measure a receive timing difference between a time when the UE receives a downlink transmission and a time when the UE receives energy from an uplink transmission performed by the UE. If the receive timing difference exceeds a specified duration (e.g., the length of the cyclic prefix), the ISI at the UE may increase. In some examples, if the measured receive timing difference increases, the interference mitigation techniques described herein may be invoked.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims the benefit of priority to U.S. Patent Application No. 17 / 406,915, filed on August 19, 2021, which claims the benefit of and priority to U.S. Provisional Patent Application Serial No. 63 / 074,967, filed on September 4, 2020, the entire contents of which are incorporated herein by reference as if fully set forth below and for all applicable purposes. Technical Field

[0003]

[0004] The techniques discussed below relate generally to wireless communications, and more particularly, to techniques for mitigating wireless communications interference. Background Art

[0004] In wireless communication systems (such as those specified in the standards for 5G New Radio (NR)), base stations and user equipment (UE) use various duplex modes to exchange signals. Duplex modes include half-duplex and full-duplex. In half-duplex communication, only one node (e.g., UE or base station) transmits at a time. In full-duplex communication, each node (e.g., UE and base station) can transmit at the same time. An example of half-duplex communication is time division duplex (TDD) communication. In 5G NR TDD, uplink signaling (e.g., from UE to base station) and downlink signaling (e.g., from base station to UE) are scheduled separately in time. Therefore, uplink communication and downlink communication do not occur at the same time. However, uplink communication and downlink communication can be sent on the same frequency (e.g., on the same carrier). An example of full-duplex communication is frequency division duplex (FDD) communication. In 5G NR FDD, uplink signaling and downlink signaling are scheduled simultaneously in time. However, the uplink and downlink may be sent at different frequencies (eg, on different and spaced-apart carriers).

[0005] In some examples, TDD can be used for full-duplex communication. For example, a base station and a UE each configured with two or more antenna panels can operate in so-called flexible TDD or full-duplex TDD (FD-TDD). The antenna panel includes an array of multiple antenna elements. The antenna panel can be referred to as an antenna array module. The antenna panel can be used for beamforming applications. Beamforming can be used to provide spatial diversity between a receiver and a transmitter. For example, a base station with two antenna panels can direct a transmit beam to a first UE and direct a receive beam toward a second UE, wherein the first UE and the second UE are at different azimuths relative to the base station. These beams do not interfere with each other because they are directed toward targets separated from each other by a certain angular distance relative to the base station. In another example, the base station and the UE can each have two panels; one panel is used for transmission and the second panel is used for reception. Even if the two panels on each device are co-located, full-duplex simultaneous reception and transmission can be achieved by using these panels in full-duplex-time division duplex (FD-TDD) mode.

[0006] In order to provide services to multiple UEs at multiple distances from the base station, the timing between uplink frames and downlink frames for each UE can be managed. For example, the base station can compensate for the propagation delay between the base station and each of the UEs by determining a corresponding timing advance for uplink transmissions to the base station for each of the UEs. Summary of the invention

[0007] In order to provide a basic understanding of one or more aspects of the present disclosure, an overview of these aspects is given below. This overview is not a general review of all expected features of the present disclosure, and is neither intended to identify the key or important elements of all aspects of the present disclosure, nor is it intended to describe the scope of any or all aspects of the present disclosure. Its sole purpose is to present some concepts of one or more aspects of the present disclosure in a form as a preface to a more detailed description given later.

[0008] In some aspects, the present disclosure relates to techniques for mitigating wireless communication interference (e.g., inter-symbol interference). For example, one or more of the cyclic prefix length, subcarrier spacing, beam pairs, or frequency domain separation may be changed to mitigate the effects of interference at a UE or base station.

[0009] In certain aspects, the present disclosure relates to a user equipment (UE) configured for full-duplex (FD) wireless communication. In some examples, the UE includes: a memory; and a processor coupled to the memory. In some examples, the memory and the processor are configured to: send a request to modify the one or more parameters for FD communication between the UE and one or more BSs including a base station (BS) based on the BS causing a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. In some examples, the memory and the processor are configured to: communicate with one or more BSs using the one or more modified parameters based on the request.

[0010] Certain aspects of the present disclosure relate to a base station (BS) configured for full-duplex (FD) wireless communication. In some examples, the BS includes: a memory; and a processor coupled to the memory. In some examples, the memory and the processor are configured to: receive from a user equipment (UE) a request for modifying the one or more parameters based on one or more parameters for FD communication between the UE and one or more BSs including the BS, resulting in a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. In some examples, the memory and the processor are configured to perform one or more of the following: send one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the other BS; or communicate with the UE using the one or more modified parameters.

[0011] Certain aspects relate to a method for full-duplex (FD) wireless communication by a user equipment (UE). The method includes sending a request to modify one or more parameters for FD communication between the UE and one or more BSs including a base station (BS) to the BS based on one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. In some examples, the method includes communicating with the one or more BSs using the one or more modified parameters based on the request.

[0012] Certain aspects relate to a method for full-duplex (FD) wireless communication performed by a base station (BS). In some examples, the method includes: receiving from a user equipment (UE) a request to modify the one or more parameters for FD communication between the UE and one or more BSs including the BS, based on the one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. In some examples, the method includes performing one or more of the following: sending one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the other BS; or communicating with the UE using the one or more modified parameters.

[0013] Certain aspects relate to a non-transitory computer-readable medium having instructions stored thereon that, when executed by a user equipment (UE), cause the UE device to perform operations. In some examples, the operations include: sending a request to modify one or more parameters for FD communication between the UE and one or more BSs including a base station (BS) based on the BS causing a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. In some examples, the operations include: communicating with the one or more BSs using the one or more modified parameters based on the request.

[0014] Certain aspects relate to a non-transitory computer-readable medium having instructions stored thereon that, when executed by a base station (BS), cause the BS to perform operations. In some examples, the operations include: receiving from a user equipment (UE) a request to modify the one or more parameters for FD communication between the UE and one or more BSs including the BS, based on the one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. In some examples, the operations include performing one or more of the following: sending one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the other BS; or communicating with the UE using the one or more modified parameters.

[0015] Certain aspects relate to a user equipment (UE) for full-duplex (FD) wireless communication. In some examples, the apparatus includes: a unit for sending a request to modify one or more parameters for FD communication between the UE and one or more BSs including a base station (BS) to the BS based on one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. In some examples, the apparatus includes: a unit for communicating with the one or more BSs using the one or more modified parameters based on the request.

[0016] Certain aspects relate to a base station (BS) for full-duplex (FD) wireless communication. In some examples, the apparatus includes: a unit for receiving from a user equipment (UE) a request to modify the one or more parameters for FD communication between the UE and one or more BSs including the BS, based on the one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. In some examples, the apparatus includes a unit for performing one or more of the following: sending one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the other BS; or communicating with the UE using the one or more modified parameters.

[0017] In some examples, the UE may measure a receive timing difference between the time the UE receives a downlink transmission (e.g., at a second antenna panel) and the time the UE receives energy from an uplink transmission performed by the UE (e.g., at a second antenna panel). If the receive timing difference exceeds a particular length of time (e.g., the length of a cyclic prefix), interference at the UE may increase. According to some aspects of the present disclosure, the interference mitigation techniques described herein above may be employed whenever the receive timing difference increases (e.g., the receive timing difference exceeds a threshold specified by the base station).

[0018] In some examples, the UE and the base station may choose to use an extended cyclic prefix instead of a normal cyclic prefix. Here, since the extended cyclic prefix is ​​longer than the normal cyclic prefix, a receiver of the transmission may be able to effectively decode the received transmission even when the measured receive timing difference is longer than the normal cyclic prefix.

[0019] In 5G NR systems, the length of the cyclic prefix depends on the subcarrier spacing specified for transmission. For example, the length of the cyclic prefix defined for a smaller subcarrier spacing (e.g., 15kHz) is longer than the length of the cyclic prefix defined for a larger subcarrier spacing (e.g., 120kHz).

[0020] In some examples, an extended cyclic prefix may be specified for various subcarrier spacings. For example, a normal extended cyclic prefix and an extended cyclic prefix may be defined for a subcarrier spacing of 120 kHz. As another example, a normal extended cyclic prefix and an extended cyclic prefix may be defined for a subcarrier spacing of 240 kHz. The extended cyclic prefix may also be used for other subcarrier spacings. By defining an extended cyclic prefix for a larger subcarrier spacing (which typically has a shortened cyclic prefix), interference at the receiver may be reduced (e.g., for full-duplex transmission scenarios where the receive timing difference is relatively large).

[0021] In some examples, full-duplex communication between the UE and the base station can be switched to a smaller subcarrier spacing to mitigate interference. By switching to a smaller subcarrier spacing (e.g., which typically has a longer cyclic prefix), interference at the receiver can be reduced (e.g., for full-duplex transmission scenarios where the receive timing difference is relatively large).

[0022] In some examples, full-duplex communication between the UE and the base station can be switched from the first beam pair to the second beam pair to mitigate interference. For example, the second beam pair can provide a shorter receive timing difference and / or lower interference (e.g., due to a wider spatial separation between the beams).

[0023] In some examples, full-duplex communication between a UE and a base station can use wider frequency domain separation to mitigate interference. For example, additional separation can be provided between a first frequency domain allocation for a first beam in a beam pair and a second frequency domain allocation for a second beam in the beam pair. By providing additional frequency separation, interference (e.g., leakage) can be reduced.

[0024] In some examples, a method of wireless communication at a user equipment may include: determining that a first subcarrier spacing (SCS) for a first transmission is 120 kHz or 240 kHz; identifying an extended cyclic prefix (ECP) associated with the first SCS; and encoding or decoding the first transmission. Encoding or decoding the first transmission may be based on the ECP.

[0025] In some examples, a user equipment may include: a transceiver; a memory; and a processor communicatively coupled to the transceiver and the memory. The processor and the memory may be configured to: determine whether a first subcarrier spacing (SCS) for a first transmission sent or received via the transceiver is 120 kHz or 240 kHz; identify an extended cyclic prefix (ECP) associated with the first SCS; and encode or decode the first transmission. Encoding or decoding the first transmission may be based on the ECP.

[0026] In some examples, a user equipment may include: means for determining that a first subcarrier spacing (SCS) for a first transmission is 120 kHz or 240 kHz; means for identifying an extended cyclic prefix (ECP) associated with the first SCS; and means for encoding or decoding the first transmission. Encoding or decoding the first transmission may be based on the ECP.

[0027] In some examples, an article for use with a user device includes: a computer-readable medium having instructions stored therein executable by one or more processors of the user device to: determine whether a first subcarrier spacing (SCS) for a first transmission is 120 kHz or 240 kHz; identify an extended cyclic prefix (ECP) associated with the first SCS; and encode or decode the first transmission. Encoding or decoding the first transmission can be based on the ECP.

[0028] One or more of the following features may apply to any of the methods, apparatus, and computer-readable media of the preceding paragraphs. The first transmission may be for full-duplex communication between a user device and a base station. A timing difference may be measured between a first timing for a downlink transmission received at the user device and a second timing for an uplink transmission received at the user device. A determination may be made that the timing difference is greater than the length of a normal cyclic prefix (CP) for the first SCS. An ECP associated with the first SCS may be identified by selecting the ECP after determining that the timing difference is greater than the length of a normal CP for the first SCS.

[0029] In some examples, a method of wireless communication at a base station may include: specifying a first subcarrier spacing (SCS) for a first transmission to be 120 kHz or 240 kHz; identifying an extended cyclic prefix (ECP) associated with the first SCS; and encoding or decoding the first transmission. Encoding or decoding the first transmission may be based on the ECP.

[0030] In some examples, a base station may include: a transceiver; a memory; and a processor communicatively coupled to the transceiver and the memory. The processor and the memory may be configured to: specify that a first subcarrier spacing (SCS) for a first transmission sent or received via the transceiver is 120 kHz or 240 kHz; identify an extended cyclic prefix (ECP) associated with the first SCS; and encode or decode the first transmission. Encoding or decoding the first transmission may be based on the ECP.

[0031] In some examples, a base station may include: means for specifying that a first subcarrier spacing (SCS) for a first transmission is 120 kHz or 240 kHz; means for identifying an extended cyclic prefix (ECP) associated with the first SCS; and means for encoding or decoding the first transmission. Encoding or decoding the first transmission may be based on the ECP.

[0032] In some examples, an article for use by a base station includes: a computer-readable medium having instructions stored therein executable by one or more processors of the base station to: specify a first subcarrier spacing (SCS) for a first transmission to be 120 kHz or 240 kHz; identify an extended cyclic prefix (ECP) associated with the first SCS; and encode or decode the first transmission. Encoding or decoding the first transmission can be based on the ECP.

[0033] One or more of the following features may apply to any of the methods, apparatus, and computer-readable media of the preceding paragraphs. The first transmission may be for full-duplex communication between a base station and a user device. An indication of a timing difference measured between a first timing for a downlink transmission received at the user device and a second timing for an uplink transmission received at the user device may be received. A determination may be made that the timing difference is greater than the length of a normal cyclic prefix (CP) for the first SCS. An ECP associated with the first SCS may be identified by selecting the ECP after determining that the timing difference is greater than the length of a normal CP for the first SCS.

[0034] In some examples, a method of wireless communication at a user equipment may include: receiving a first indication from a base station; determining that the first indication specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); and communicating with the base station using the first configurable ECP designated for the first SCS.

[0035] In some examples, a user equipment may include: a transceiver; a memory; and a processor communicatively coupled to the transceiver and the memory. The processor and the memory may be configured to: receive a first indication from a base station via the transceiver; determine that the first indication specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); and communicate with the base station via the transceiver using the first configurable ECP specified for the first SCS.

[0036] In some examples, a user device may include: a unit for receiving a first indication from a base station; a unit for determining that the first indication specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); and a unit for communicating with the base station using the first configurable ECP specified for the first SCS.

[0037] In some examples, an article for use with a user device includes: a computer-readable medium having instructions stored therein executable by one or more processors of the user device to perform the following operations: receiving a first indication from a base station; determining that the first indication specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); and communicating with the base station using the first configurable ECP specified for the first SCS.

[0038] One or more of the following features may apply to any of the methods, apparatus, and computer-readable media of the preceding paragraphs. The first indication may also specify the length of the ECP. The first indication may also specify that the first SCS is 120 kHz or 240 kHz. A request for a first configurable ECP may be sent to the base station before receiving the first indication from the base station. The request may be to use an ECP instead of a normal cyclic prefix for the first SCS.

[0039] In some examples, a method of wireless communication at a base station may include: generating a first indication that specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); sending the first indication to a user equipment; and communicating with the user equipment using the first configurable ECP designated for the first SCS.

[0040] In some examples, a base station may include: a transceiver; a memory; and a processor communicatively coupled to the transceiver and the memory. The processor and the memory may be configured to: generate a first indication that specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); send the first indication to a user equipment via the transceiver; and communicate with the user equipment via the transceiver using the first configurable ECP specified for the first SCS.

[0041] In some examples, a base station may include: a unit for generating a first indication, the first indication specifying a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); a unit for sending the first indication to a user equipment; and a unit for communicating with the user equipment using the first configurable ECP designated for the first SCS.

[0042] In some examples, an article for use with a base station includes: a computer-readable medium having instructions stored therein executable by one or more processors of the base station to: generate a first indication specifying a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); sending the first indication to a user equipment; and communicating with the user equipment using the first configurable ECP specified for the first SCS.

[0043] One or more of the following features may apply to any of the methods, apparatus, and computer-readable media of the preceding paragraphs. The first indication may also specify the length of the ECP. The first indication may also specify that the first SCS is 120 kHz or 240 kHz. A request for a first configurable ECP may be received from the user equipment before the first indication is sent to the user equipment. The request may be to use an ECP instead of a normal cyclic prefix for the first SCS.

[0044] In some examples, a method of wireless communication at a user equipment may include: generating at least one request; sending at least one request to a base station; and receiving at least one response to the at least one request from the base station. The at least one request may include at least one of the following: a request for a smaller subcarrier spacing (SCS) for full-duplex communication, a request for a switch from a first beam pair to a second beam pair for full-duplex communication, a request for additional frequency domain separation for full-duplex communication, or a combination thereof. The at least one response may include at least one of the following: an indication of a smaller SCS, an indication of a switch from a first beam pair to a second beam pair, an indication of additional frequency domain separation, or any combination thereof.

[0045] In some examples, a user equipment may include: a transceiver; a memory; and a processor communicatively coupled to the transceiver and the memory. The processor and the memory may be configured to: generate at least one request; send at least one request to a base station via the transceiver; and receive at least one response to at least one request from the base station via the transceiver. The at least one request may include at least one of the following: a request for a smaller subcarrier spacing (SCS) for full-duplex communication, a request for switching from a first beam pair to a second beam pair for full-duplex communication, a request for additional frequency domain separation for full-duplex communication, or a combination thereof. The at least one response may include at least one of the following: an indication of a smaller SCS, an indication of switching from a first beam pair to a second beam pair, an indication of additional frequency domain separation, or any combination thereof.

[0046] In some examples, a user equipment may include: a unit for generating at least one request; a unit for sending at least one request to a base station; and a unit for receiving at least one response to the at least one request from the base station. The at least one request may include at least one of the following: a request for a smaller subcarrier spacing (SCS) for full-duplex communication, a request for switching from a first beam pair to a second beam pair for full-duplex communication, a request for additional frequency domain separation for full-duplex communication, or a combination thereof. The at least one response may include at least one of the following: an indication of a smaller SCS, an indication of switching from a first beam pair to a second beam pair, an indication of additional frequency domain separation, or any combination thereof.

[0047] In some examples, an article for use with a user device includes: a computer-readable medium having instructions stored therein executable by one or more processors of the user device to perform the following operations: generate at least one request; send at least one request to a base station; and receive at least one response to the at least one request from the base station. The at least one request may include at least one of the following: a request for a smaller subcarrier spacing (SCS) for full-duplex communication, a request for a switch from a first beam pair to a second beam pair for full-duplex communication, a request for additional frequency domain separation for full-duplex communication, or a combination thereof. The at least one response may include at least one of the following: an indication of a smaller SCS, an indication of a switch from a first beam pair to a second beam pair, an indication of additional frequency domain separation, or any combination thereof.

[0048] One or more of the following features may apply to any of the methods, apparatus, and computer-readable media of the preceding paragraphs. A specific SCS may be identified based on a timing difference measured between a first timing for downlink transmissions received at a user equipment and a second timing for uplink transmissions received at the user equipment. A request for a smaller SCS may include an indication of a specific SCS. A specific beam pair may be identified based on a timing difference measured between a first timing for downlink transmissions received at a user equipment and a second timing for uplink transmissions received at the user equipment. A request for switching from a first beam pair to a second beam pair may specify a specific beam pair as the second beam pair. A specific increase in frequency domain separation may be identified based on a timing difference measured between a first timing for downlink transmissions received at a user equipment and a second timing for uplink transmissions received at the user equipment. A request for additional frequency domain separation may specify a specific increase in frequency domain separation.

[0049] In some examples, a method of wireless communication at a base station may include: selecting at least one of the following for full-duplex communication with a user device: a smaller subcarrier spacing (SCS), switching from a first beam pair to a second beam pair, additional frequency domain separation, or any combination thereof; and sending at least one indication of the selection to the user device.

[0050] In some examples, a base station may include: a transceiver; a memory; and a processor, which is communicatively coupled to the transceiver and the memory. The processor and the memory may be configured to: select at least one of the following for full-duplex communication with a user equipment: a smaller subcarrier spacing (SCS), a switch from a first beam pair to a second beam pair, additional frequency domain separation, or any combination thereof; and send at least one indication of the selection to the user equipment via the transceiver.

[0051] In some examples, a base station may include: a unit for selecting at least one of the following for full-duplex communication with a user equipment: a smaller subcarrier spacing (SCS), a switch from a first beam pair to a second beam pair, additional frequency domain separation, or any combination thereof; and a unit for sending at least one indication of the selection to the user equipment.

[0052] In some examples, an article for use with a base station includes: a computer-readable medium having instructions stored therein that are executable by one or more processors of the base station to perform the following operations: selecting at least one of the following for full-duplex communication with a user device: a smaller subcarrier spacing (SCS), a switch from a first beam pair to a second beam pair, additional frequency domain separation, or any combination thereof; and sending at least one indication of the selection to the user device.

[0053] One or more of the following features may apply to any of the methods, apparatus, and computer-readable media of the preceding paragraphs. At least one request may be received from a user device. The at least one request may include at least one of the following: a request for a smaller SCS, a request for switching from a first beam pair to a second beam pair, a request for additional frequency domain separation, or a combination thereof.

[0054] After reviewing the following detailed description, these aspects and other aspects of the present disclosure will become more fully understood. After reviewing the following description of the specific example embodiments of the present disclosure in conjunction with the accompanying drawings, other aspects, features and embodiments of the present disclosure will become apparent to those of ordinary skill in the art. Although the features of the present disclosure may be discussed below with respect to certain embodiments and the accompanying drawings, all embodiments of the present disclosure may include one or more features in the advantageous features discussed herein. In other words, although one or more embodiments may be discussed as having certain advantageous features, one or more features in such features may also be used according to the various embodiments of the present disclosure discussed herein. In a similar manner, although the example embodiments may be discussed below as equipment, system or method embodiments, it should be understood that such example embodiments may be implemented in various devices, systems and methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 is a schematic diagram of a wireless communication system according to some aspects.

[0056] Figure 2 is a conceptual diagram of an example of a radio access network in accordance with some aspects.

[0057] Figure 3 is a diagram of an example of wireless resources in an air interface utilizing orthogonal frequency division multiplexing (OFDM) according to some aspects.

[0058] Figure 4 is a block diagram illustrating an example of a wireless communication system supporting beamforming and / or multiple-input multiple-output (MIMO) communications in accordance with some aspects.

[0059] Figure 5 is a diagram illustrating an example of communications between a radio access network (RAN) node and a wireless communication device using beamforming in accordance with some aspects.

[0060] Fig. 6A and Figure 6B is a diagram depicting communication via two antenna panels according to some aspects.

[0061] Fig. 7A , Figure 7B and Figure 7C is a schematic diagram of sources of interference to a base station and a UE according to some aspects.

[0062] Figure 8 is a conceptual illustration of uplink timing and downlink timing in accordance with some aspects.

[0063] Fig. 9is a conceptual diagram of uplink timing and downlink timing for full-duplex communications in accordance with some aspects.

[0064] Fig.10 is a diagram of OFDM symbol parameters for different subcarrier spacings in accordance with some aspects.

[0065] Fig.11 is a diagram of different cyclic prefixes for different subcarrier spacings in accordance with some aspects.

[0066] Fig.12 is a signaling diagram illustrating signaling related to use of an extended cyclic prefix in accordance with some aspects.

[0067] Fig.13 is a signaling diagram illustrating signaling associated with switching to smaller subcarrier spacing according to some aspects.

[0068] Fig.14 is a diagram illustrating an example of beam switching according to some aspects.

[0069] Fig.15 is a signaling diagram illustrating signaling related to beam switching according to some aspects.

[0070] Fig.16A and Fig. 16B is a diagram illustrating frequency domain separation according to some aspects.

[0071] Fig.17 is a signaling diagram illustrating signaling associated with adding frequency domain separation according to some aspects.

[0072] Fig.18 is a block diagram illustrating an example of a hardware implementation for a user device employing a processing system according to some aspects.

[0073] Fig.19 is a flow chart of an example process for using an extended cyclic prefix in accordance with some aspects.

[0074] Fig. 20 is a flow diagram of an example process for dynamically configuring an extended cyclic prefix in accordance with some aspects.

[0075] Fig.21 is a flow chart of an example process for requesting lower subcarrier spacing, beam pair switching, additional frequency domain separation, or a combination thereof, in accordance with some aspects.

[0076] Fig. 22 is a block diagram illustrating an example of a hardware implementation for a base station employing a processing system according to some aspects.

[0077] Fig.23is a flow chart of an example process for using an extended cyclic prefix in accordance with some aspects.

[0078] Fig.24 is a flow diagram of an example process for dynamically configuring an extended cyclic prefix in accordance with some aspects.

[0079] Fig.25 is a flow chart of an example process for selecting lower subcarrier spacing, beam pair switching, additional frequency domain separation, or a combination thereof, according to some aspects.

[0080] Fig.26 is a signaling diagram illustrating signaling related to modification of communication parameters according to some aspects.

[0081] Fig. 27 is a flow chart of an example process for modifying communication parameters in accordance with some aspects.

[0082] Fig.28 is a block diagram illustrating an example of a hardware implementation for a user device employing a processing system according to some aspects.

[0083] Fig.29 is a flow chart of an example process for modifying communication parameters in accordance with some aspects.

[0084] Fig.30 is a block diagram illustrating an example of a hardware implementation for a base station employing a processing system according to some aspects. DETAILED DESCRIPTION

[0085] Within a cellular communication network, wireless communication may occur between a user equipment (UE) and a base station (BS). In full-duplex (FD) communication, time alignment between uplink and downlink communication periods (e.g., symbols) at the UE and BS may reduce or eliminate interference, such as intra-cellular interference at the BS, self-interference at the UE, etc. However, the UE and the BS may experience propagation delays that affect the timing of the UE receiving a downlink signal sent by the BS and the timing of the BS receiving an uplink signal sent by the UE, such as due to the mobility and / or geographic distance of the UE.

[0086] This misalignment may cause an increase in interference at the device. Specifically, uplink communication and downlink communication may each include a cyclic prefix (CP). If the CPs of uplink communication and downlink communication overlap in time at a specific device (e.g., UE or BS), the device may be able to perform interference elimination to handle the impact of any interference between uplink communication and downlink communication. However, if the CPs of uplink communication and downlink communication at the device do not overlap in time, there may be interference between communications. Therefore, some of the techniques discussed herein provide timing alignment of uplink communication and downlink communication at the device, wherein at least the CPs of uplink communication and downlink communication at the device overlap in time, such as to allow interference elimination at the device. This timing alignment can increase the reliability of communication, including reducing the need for performing retransmissions, thereby increasing the throughput on the network.

[0087] Various aspects of the present disclosure may be applicable to FD operation with simultaneous uplink and downlink transmissions. FD modes may include single-band FD (SBFD) in flexible time division duplex (TDD), but may also include frequency division duplex (FDD) in paired spectrum, SBFD in unpaired spectrum, partially overlapping spectrum FD, fully overlapping spectrum FD, intra-band FD, or other types of full-duplex operation.

[0088] This FD capability can be implemented at the base station (e.g., gNB), the UE, or both. For example, the UE can send uplink signals from one panel and receive downlink signals at another panel. In some aspects, full-duplex performance can depend on beam separation and / or other factors. For example, a first beam pair having more spatial separation than a second beam pair can have less self-interference than the second beam pair.

[0089] In some aspects, the FD capability may improve (e.g., reduce) latency. For example, compared to half-duplex communication in which only some of the time slots are reserved for uplink transmission, in FD communication, the UE may not need to wait for an available uplink time slot to send uplink information, thereby reducing latency for uplink transmission. As another example, the UE may receive a downlink signal in a time slot that is dedicated as an uplink-only time slot, thereby reducing latency for downlink transmission.

[0090] In some aspects, FD capabilities can improve spectrum efficiency (e.g., per cell, per UE, etc.). For example, in FD communications, the same time slot and / or frequency resources can be used concurrently for uplink and downlink transmissions. Here, the downlink and uplink frequency bands in FD communications can be fully overlapped, partially overlapped, or separated by a guard band therebetween.

[0091] In some aspects, the present disclosure relates to mitigating interference for FD communications and other types of communications. As discussed herein, the interference can be based on one or more of the relative timing, leakage or other factors of uplink transmission and downlink transmission. The detailed description set forth below in conjunction with the accompanying drawings is intended to be a description of various configurations, and is not intended to represent the only configuration in which the concept described herein can be practiced. In order to provide a comprehensive understanding of each concept, the detailed description includes specific details. However, it will be apparent to those skilled in the art that these concepts can be practiced without these specific details. In some cases, well-known structures and components are shown in block diagram form to avoid blurring such concepts.

[0092] Although various aspects and embodiments are described in this application by the description of some examples, it will be understood by those skilled in the art that additional implementations and use cases can be generated in many different arrangements and scenarios. The innovation described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and packaging arrangements. For example, embodiments and / or uses can be generated via integrated chip embodiments and other devices based on non-module components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchase equipment, medical devices, artificial intelligence-enabled devices, etc.). Although some examples may or may not be specifically for use cases or applications, there may be a variety of applicability of the described innovation. The scope of implementation can range from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or original equipment manufacturer (OEM) devices or systems incorporating one or more aspects of the described innovation. In some actual settings, the device incorporating the described aspects and features may also necessarily include additional components and features for the implementation and practice of the claimed and described embodiments. For example, the transmission and reception of wireless signals necessarily include several components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / summers, etc.). It is intended that the innovations described herein can be practiced in a variety of devices, chip-level components, systems, distributed arrangements, end-user devices, etc., having different sizes, shapes, and configurations.

[0093] The various concepts presented throughout this disclosure may be implemented across a wide variety of telecommunication systems, network architectures, and communication standards. Figure 1, various aspects of the present disclosure are illustrated with reference to a wireless communication system 100, by way of illustrative example and not limitation. The wireless communication system 100 includes three interacting domains: a core network 102, a radio access network (RAN) 104, and at least one scheduled entity 106. In the following discussion, the at least one scheduled entity 106 may be referred to as a user equipment (UE) 106. The RAN 104 includes at least one scheduling entity 108. In the following discussion, the at least one scheduling entity 108 may be referred to as a base station (BS) 108. By means of the wireless communication system 100, the UE 106 is enabled to perform data communications with an external data network 110, such as (but not limited to) the Internet.

[0094] The RAN 104 may implement any one or more suitable wireless communication technologies to provide radio access to the UE 106. As an example, the RAN 104 may operate in accordance with the 3rd Generation Partnership Project (3GPP) New Radio (NR) specification, often referred to as 5G. As another example, the RAN 104 may operate in accordance with a hybrid of 5G NR and Evolved Universal Terrestrial Radio Access Network (eUTRAN) standards, often referred to as LTE. 3GPP refers to this hybrid RAN as the Next Generation RAN or NG-RAN. Of course, many other examples may be utilized within the scope of the present disclosure.

[0095] As shown, RAN 104 includes multiple base stations 108. In a broad sense, a base station is a network element in a radio access network that is responsible for radio transmission and reception to or from a UE in one or more cells. In different technologies, standards or contexts, those skilled in the art may refer to base stations as base transceiver (BTS), radio base stations, radio transceivers, transceiver functional units, basic service sets (BSS), extended service sets (ESS), access points (APs), node Bs (NBs), evolved node Bs (eNBs), gNodeBs (gNBs), transmit receive points (TRPs), or some other appropriate terminology. In some examples, a base station may include two or more TRPs that may be co-located or non-co-located. TRPs may communicate on the same carrier frequency or on different carrier frequencies in the same frequency band or in different frequency bands.

[0096] The radio access network 104 is also shown to support wireless communications for multiple mobile devices. In the 3GPP standard, a mobile device may be referred to as a user equipment (UE), but may also be referred to as a mobile station (MS), a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal (AT), a mobile terminal, a wireless terminal, a remote terminal, a handset, a terminal, a user agent, a mobile client, a client, or some other appropriate terminology by those skilled in the art. A UE may be a device that provides a user with access to network services.

[0097] Within this document, a "mobile" device does not necessarily need to have the ability to move, but can be stationary. The term mobile device or mobile device broadly refers to a wide variety of devices and technologies. A UE may include several hardware structural components that are sized, shaped, and arranged to facilitate communication; such components may include antennas, antenna arrays, radio frequency (RF) chains, amplifiers, one or more processors, etc. that are electrically coupled to each other. For example, some non-limiting examples of mobile devices include mobile stations, cellular (cell) phones, smart phones, session initiation protocol (SIP) phones, laptops, personal computers (PCs), notebooks, netbooks, smartbooks, tablet devices, personal digital assistants (PDAs), and a wide variety of embedded systems (e.g., corresponding to the "Internet of Things" (IoT)). In addition, the mobile device may be a car or other means of transportation, a remote sensor or actuator, a robot or robotic device, a satellite radio unit, a global positioning system (GPS) device, an object tracking device, a drone, a multi-rotor helicopter, a quadcopter, a remote control device, a consumer device and / or a wearable device such as glasses, a wearable camera, a virtual reality device, a smart watch, a health or fitness tracker, a digital audio player (e.g., an MP3 player), a camera, a game console, etc. In addition, the mobile device may be a digital home or smart home device, such as a home audio, video and / or multimedia device, an appliance, a vending machine, smart lighting, a home security system, a smart meter, etc. In addition, the mobile device may be a smart energy device, a security device, a solar panel or solar array, a municipal infrastructure device that controls power (e.g., a smart grid), lighting, water use, etc.; industrial automation and enterprise devices; logistics controllers; agricultural equipment; military defense equipment, vehicles, aircraft, ships and weapons, etc. In addition, the mobile device may provide connected medicine or telemedicine support (i.e., remote health care). Telemedicine devices may include telemedicine monitoring devices and telemedicine management devices, whose communications may be given priority or priority access relative to other types of information, for example, in terms of priority access for the transmission of critical service data, and / or related QoS for the transmission of critical service data.

[0098] Wireless communication between RAN 104 and UE 106 can be described as utilizing an air interface. Transmissions from a base station (e.g., base station 108) to one or more UEs (e.g., UE 106) over the air interface can be referred to as downlink (DL) transmissions. According to certain aspects of the present disclosure, the term downlink can refer to point-to-multipoint transmissions originating from a scheduling entity (further described below; e.g., base station 108). Another way to describe this scheme can be to use the term broadcast channel multiplexing. Transmissions from a UE (e.g., UE 106) to a base station (e.g., base station 108) can be referred to as uplink (UL) transmissions. According to further aspects of the present disclosure, the term uplink can refer to point-to-point transmissions originating from a scheduled entity (further described below; e.g., UE 106).

[0099] In some examples, access to the air interface may be scheduled, wherein a scheduling entity (e.g., a base station 108) allocates resources for communication between some or all devices and apparatuses within its service area or cell. Within the present disclosure, as further discussed below, a scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more scheduled entities. That is, for scheduled communications, a UE 106 (which may be a scheduled entity) may utilize resources allocated by the scheduling entity 108.

[0100] Base station 108 is not the only entity that can act as a scheduling entity. That is, in some examples, a UE can act as a scheduling entity that schedules resources for one or more scheduled entities (eg, one or more other UEs).

[0101] like Figure 1 As shown, the scheduling entity 108 can broadcast downlink traffic 112 to one or more scheduled entities 106. In a broad sense, the scheduling entity 108 is a node or device responsible for scheduling traffic in the wireless communication network, including downlink traffic 112, and in some examples, uplink traffic 116 from one or more scheduled entities 106 to the scheduling entity 108. On the other hand, the scheduled entity 106 is a node or device that receives downlink control information 114 (including but not limited to scheduling information (e.g., grants), synchronization or timing information, or other control information) from another entity in the wireless communication network, such as the scheduling entity 108.

[0102] In addition, uplink and / or downlink control information and / or traffic information may be divided into frames, subframes, time slots and / or symbols by time. As used herein, a symbol may refer to a time unit in which each subcarrier carries a resource element (RE) in an orthogonal frequency division multiplexing (OFDM) waveform. A time slot may carry 7 or 14 OFDM symbols. A subframe may refer to a duration of 1 ms. Multiple subframes or time slots may be grouped together to form a single frame or radio frame. Of course, these definitions are not required, and any appropriate scheme for organizing a waveform may be utilized, and the various time divisions of a waveform may have any appropriate duration.

[0103] Typically, base stations 108 may include a backhaul interface for communicating with a backhaul portion 120 of a wireless communication system. Backhaul 120 may provide a link between base stations 108 and core network 102. Additionally, in some examples, a backhaul network may provide interconnections between respective base stations 108. Various types of backhaul interfaces may be employed, such as a direct physical connection, a virtual network, or a backhaul interface using any suitable transport network.

[0104] The core network 102 may be part of the wireless communication system 100 and may be independent of the radio access technology used in the RAN 104. In some examples, the core network 102 may be configured according to 5G standards (e.g., 5GC). In other examples, the core network 102 may be configured according to 4G Evolved Packet Core (EPC) or any other appropriate standard or configuration.

[0105] Reference now Figure 2 , by way of example and not limitation, a schematic diagram of a RAN 200 is provided. In some examples, the RAN 200 may be similar to the one described above and in Figure 1 The geographic area covered by the RAN 200 may be divided into cellular regions (cells) that a user equipment (UE) may uniquely identify based on an identity broadcast from an access point or base station. Figure 2 Macro cells 202, 204, and 206 and small cells 208 are shown, each of which may include one or more sectors (not shown). A sector is a sub-area of ​​a cell. All sectors within a cell are served by the same base station. A radio link within a sector can be identified by a single logical identifier belonging to the sector. In a cell divided into sectors, multiple sectors within a cell can be formed by multiple groups of antennas, each of which is responsible for communication with a UE in a portion of the cell.

[0106] Various base station arrangements can be used. Figure 2, two base stations 210 and 212 are shown in cells 202 and 204; and a third base station 214 is shown as controlling a remote radio head (RRH) 216 in cell 206. That is, the base station may have an integrated antenna or may be connected to an antenna or RRH by a feeder cable. In the example shown, cells 202, 204, and 206 may be referred to as macro cells, because base stations 210, 212, and 214 support cells with large sizes. In addition, base station 218 is shown in a small cell 208 (e.g., a micro cell, a pico cell, a femto cell, a home base station, a home node B, a home eNode B, etc.), which may overlap with one or more macro cells. In this example, cell 208 may be referred to as a small cell, because base station 218 supports a cell with a relatively small size. The cell size setting may be performed according to the system design and component constraints.

[0107] It will be appreciated that the radio access network 200 may include any number of wireless base stations and cells. In addition, relay nodes may be deployed to extend the size or coverage area of ​​a given cell. Base stations 210, 212, 214, 218 provide wireless access points to the core network for any number of mobile devices. In some examples, base stations 210, 212, 214, and / or 218 may be similar to those described above and in Figure 1 The base station / scheduling entity 108 shown in FIG.

[0108] Within the RAN 200, cells may include UEs that may communicate with one or more sectors of each cell. In addition, each base station 210, 212, 214, and 218 may be configured to provide access to a core network (e.g., as in FIG. 1 ) for all UEs in the corresponding cell. Figure 1 210; UEs 226 and 228 may communicate with base station 212; UEs 230 and 232 may communicate with base station 214 by way of RRH 216; and UE 234 may communicate with base station 218. In some examples, UEs 222, 224, 226, 228, 230, 232, 234, 238, 240, and / or 242 may communicate with base station 210 as described above and in Figure 1 The UE / scheduled entity 106 shown in FIG. 1 is the same as that shown in FIG.

[0109] In some examples, an unmanned aerial vehicle (UAV) 220 (which may be a drone or a quadcopter) may be a mobile network node and may be configured to act as a UE. For example, UAV 220 may operate within cell 202 by communicating with base station 210. In some examples, UAV 220 may be configured to act as a BS. That is, in some examples, a cell may not necessarily be stationary, and the geographic area of ​​a cell may move depending on the location of a mobile base station (such as UAV 220).

[0110] In the radio access network 200, the ability of a UE to communicate while moving (independent of its location) is called mobility. The various physical channels between the UE and the radio access network are usually established, maintained, and released under the control of the Access and Mobility Management Function (AMF). Figure 2 ) may include a Security Context Management Function (SCMF) that manages security contexts for both control plane and user plane functionalities and a Security Anchor Function (SEAF) that performs authentication.

[0111] The radio access network 200 can utilize DL-based mobility or UL-based mobility to implement mobility and switching (i.e., the connection of the UE is switched from one radio channel to another radio channel for transmission). In a network configured for DL-based mobility, during a call with a scheduling entity, or at any other time, the UE can monitor various parameters of the signal from its serving cell and various parameters of neighboring cells. Based on the quality of these parameters, the UE can maintain communication with one or more of the neighboring cells. During this time, if the UE moves from one cell to another, or if the signal quality from the neighboring cell exceeds the signal quality from the serving cell for a given amount of time, the UE can perform a handoff or handover from the serving cell to the neighboring (target) cell. For example, a UE 224 (shown as a vehicle, but any suitable form of UE can be used) can move from a geographic area corresponding to its serving cell 202 to a geographic area corresponding to a neighboring cell 206. When the signal strength or quality from neighbor cell 206 exceeds the signal strength or quality of its serving cell 202 for a given amount of time, UE 224 may send a report message indicating this condition to its serving base station 210. In response, UE 224 may receive a handover command, and the UE may perform a handover to cell 206.

[0112] In a network configured for UL-based mobility, the network can utilize the UL reference signal from each UE to select a serving cell for each UE. In some examples, base stations 210, 212, and 214 / 216 can broadcast a unified synchronization signal (e.g., a unified primary synchronization signal (PSS), a unified secondary synchronization signal (SSS), and a unified physical broadcast channel (PBCH)). UEs 222, 224, 226, 228, 230, and 232 can receive the unified synchronization signal, derive the carrier frequency and slot timing based on the synchronization signal, and send an uplink pilot or reference signal in response to the derived timing. The uplink pilot signal sent by a UE (e.g., UE 224) can be received simultaneously by two or more cells (e.g., base stations 210 and 214 / 216) within the radio access network 200. Each of these cells may measure the strength of the pilot signal, and the radio access network (e.g., base stations 210 and 214 / 216 and / or one or more of the central nodes within the core network) may determine a serving cell for UE 224. As UE 224 moves through radio access network 200, the network may continue to monitor the uplink pilot signals sent by UE 224. When the signal strength or quality of the pilot signal measured by a neighboring cell exceeds the signal strength or quality measured by the serving cell, network 200 may handover UE 224 from the serving cell to the neighboring cell with or without notifying UE 224.

[0113] Although the synchronization signal transmitted by base stations 210, 212 and 214 / 216 may be uniform, the synchronization signal may not identify a specific cell, but may identify a region of multiple cells operating on the same frequency and / or with the same timing. Using regions in a 5G network or other next generation communication network implements an uplink-based mobility framework and increases the efficiency of both the UE and the network because the number of mobility messages that need to be exchanged between the UE and the network can be reduced.

[0114] In various implementations, the air interface in the radio access network 200 may utilize a licensed spectrum, an unlicensed spectrum, or a shared spectrum. Licensed spectrum typically provides exclusive use of a portion of the spectrum with the help of a mobile network operator purchasing a license from a government regulator. Unlicensed spectrum provides shared use of a portion of the spectrum without the need for a government-granted license. Although some technical rules are still typically required to access the unlicensed spectrum, in general, any operator or device can gain access. Shared spectrum may fall between licensed spectrum and unlicensed spectrum, where technical rules or restrictions may be required to access the spectrum, but the spectrum may still be shared by multiple operators and / or multiple RATs. For example, a license holder of a portion of a licensed spectrum may provide licensed shared access (LSA) to share the spectrum with other parties (e.g., with appropriate licensee-determined conditions to obtain access).

[0115] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified with the frequency range names FR1 (410 MHz-7.125 GHz) and FR2 (24.25 GHz-52.6 GHz). Frequencies between FR1 and FR2 are typically referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is typically (interchangeably) referred to as the "Sub-6 GHz" band in various documents and articles. Similar naming issues sometimes arise with respect to FR2, which is typically (interchangeably) referred to as the "millimeter wave" band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz-300 GHz) identified as the "millimeter wave" band by the International Telecommunication Union (ITU).

[0116] In view of the above, unless otherwise specifically stated, it should be understood that the term "sub-6 GHz" and the like (if used herein) can broadly represent frequencies that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specifically stated, it should be understood that the term "millimeter wave" and the like (if used herein) can broadly represent frequencies that can include mid-band frequencies, can be within FR2, or can be within the EHF band.

[0117] The air interface in the radio access network 200 may utilize one or more multiplexing and multiple access algorithms to enable simultaneous communication of various devices. For example, the 5G NR specification utilizes orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) to provide multiple access for UL transmissions from UEs 222 and 224 to base station 210 and multiplexing for DL ​​transmissions from base station 210 to one or more UEs 222 and 224. In addition, for UL transmissions, the 5G NR specification provides support for discrete Fourier transform spread OFDM (DFT-s-OFDM) with CP (also referred to as single carrier FDMA (SC-FDMA)). However, within the scope of the present disclosure, multiplexing and multiple access are not limited to the above schemes, and may be provided using time division multiple access (TDMA), code division multiple access (CDMA), frequency division multiple access (FDMA), sparse code multiple access (SCMA), resource extension multiple access (RSMA), or other appropriate multiple access schemes. In addition, multiplexing of DL transmissions from base station 210 to UEs 222 and 224 may be provided using time division multiplexing (TDM), code division multiplexing (CDM), frequency division multiplexing (FDM), orthogonal frequency division multiplexing (OFDM), sparse code multiplexing (SCM), or other suitable multiplexing schemes.

[0118] The air interface in the radio access network 200 can also utilize one or more duplex algorithms. Duplex refers to a point-to-point communication link, in which two endpoints can communicate with each other in two directions. Full-duplex means that two endpoints can communicate with each other simultaneously. Half-duplex means that only one endpoint can send information to the other endpoint at a certain time. Half-duplex simulation is often implemented for wireless links using time division duplex (TDD). In TDD, transmissions in different directions on a given channel are separated from each other using time division multiplexing. That is, at some times, the channel is dedicated to transmission in one direction, and at other times, the channel is dedicated to transmission in the other direction, where the direction can change very quickly (e.g., several times per time slot). In wireless links, full-duplex channels usually rely on physical isolation of transmitters and receivers and suitable interference elimination techniques. Full-duplex simulation is often implemented for wireless links by utilizing frequency division duplex (FDD) or space division duplex (SDD). In FDD, transmissions in different directions operate at different carrier frequencies. In SDD, transmissions in different directions on a given channel are separated from each other using spatial division multiplexing (SDM). In other examples, full-duplex communication can be implemented within an unpaired spectrum (e.g., within a single carrier bandwidth), where transmissions in different directions occur within different sub-bands of the carrier bandwidth. This type of full-duplex communication may be referred to as sub-band full-duplex (SBFD), also known as flexible duplex.

[0119] In another aspect of RAN 200, sidelink signals can be used between UEs without having to rely on scheduling or control information from a base station. For example, two or more UEs (e.g., UE 226 and 228) can communicate with each other using peer-to-peer (P2P) or sidelink signals 227 without relaying the communication through a base station (e.g., base station 212). In another example, UE 238 is shown communicating with UEs 240 and 242. Here, UE 238 can act as a scheduling entity or a primary sidelink device, and UEs 240 and 242 can act as scheduled entities or non-primary (e.g., auxiliary) sidelink devices. In another example, a UE can act as a scheduling entity in a device-to-device (D2D), peer-to-peer (P2P) or vehicle-to-vehicle (V2V) network and / or in a mesh network. In the mesh network example, UEs 240 and 242 can optionally communicate directly with each other in addition to communicating with UE 238 (e.g., acting as a scheduling entity). Thus, in a wireless communication system having scheduled access to time-frequency resources and having a cellular configuration, a P2P configuration, or a mesh configuration, a scheduling entity and one or more scheduled entities can communicate using the scheduled resources. In some examples, the sidelink signal 227 includes sidelink traffic (e.g., a physical sidelink shared channel) and sidelink control (e.g., a physical sidelink control channel).

[0120] In some examples, two or more UEs (e.g., UEs 226 and 228) within the coverage area of ​​serving base station 212 can communicate with base station 212 using both cellular signals and direct link signals (e.g., sidelink signals 227) without relaying the communications through the base station. In an example of a V2X network within the coverage area of ​​base station 212, base station 212 and / or one or both of UEs 226 and 228 can act as a scheduling entity to schedule sidelink communications between UEs 226 and 228.

[0121] Various aspects of the present disclosure will be described with reference to OFDM waveforms. Figure 3 An example of an OFDM waveform is schematically shown in FIG. It should be understood by those skilled in the art that various aspects of the present disclosure may be applied to SC-FDMA waveforms in substantially the same manner as described below herein. That is, while some examples of the present disclosure may focus on OFDM links for clarity, it should be understood that the same principles may also be applied to SC-FDMA waveforms.

[0122] Reference now Figure 3, showing an expanded view of an example DL subframe (SF) 302A showing an OFDM resource grid 304. However, as will be readily appreciated by those skilled in the art, the physical layer (PHY) transmission structure for any particular application may differ from the examples described herein, depending on any number of factors. Here, time is in the horizontal direction, in units of OFDM symbols; and frequency is in the vertical direction, in units of subcarriers. 5G NR supports scalable numerology, where different numerologies can be used for different RF spectra, different bandwidths, etc. For example, subcarrier spacings (SCSs) of 15 kilohertz (kHz), 30kHz, 60kHz, 120kHz, 240kHz, 480kHz, 960kHz, etc. may be used in different scenarios.

[0123] Resource grid 304 can be used to schematically represent the time-frequency resources for a given antenna port. That is, in a multiple-input multiple-output (MIMO) implementation with multiple available antenna ports, corresponding multiple resource grids 304 can be available for communication. Resource grid 304 is divided into multiple resource elements (REs) 306. RE (which is 1 carrier × 1 symbol) is the smallest discrete part of the time-frequency grid and contains a single complex value representing data from a physical channel or signal. Depending on the modulation utilized in a specific implementation, each RE can represent one or more bits of information. In some examples, a block of REs can be referred to as a physical resource block (PRB) or more simply a resource block (RB) 308, which contains any appropriate number of consecutive subcarriers in the frequency domain. In one example, an RB can include 12 subcarriers, regardless of the number of digital schemes used. In some examples, depending on the digital scheme, an RB can include any appropriate number of consecutive OFDM symbols in the time domain. Within the present disclosure, it is assumed that a single RB (such as RB 308) corresponds entirely to a single direction of communication (sending or receiving for a given device).

[0124] Scheduling a UE (e.g., a scheduled entity) for downlink, uplink, or sidelink transmissions typically involves scheduling one or more resource elements 306 within one or more subbands or bandwidth parts (BWPs). Each BWP may include two or more contiguous or continuous RBs. Thus, a UE typically utilizes only a subset of a resource grid 304. In some examples, an RB may be the smallest unit of resources that may be allocated to a UE. Thus, the more RBs scheduled for a UE and the higher the modulation scheme selected for the air interface, the higher the data rate for the UE. The RBs may be scheduled by a base station (e.g., a gNB, eNB, RSU, etc.) or may be self-scheduled by a UE implementing D2D sidelink communications.

[0125] In this diagram, RB 308 is shown as occupying less than the entire bandwidth of subframe 302A, with some subcarriers shown above and below RB 308. In a given implementation, subframe 302A may have a bandwidth corresponding to any number of one or more RBs 308. Furthermore, in this diagram, while RB 308 is shown as occupying less than the entire duration of subframe 302A, this is merely one possible example.

[0126] Each 1 ms subframe 302A may include one or more adjacent time slots. Figure 3 In the example shown in , a subframe 302B includes four time slots 310 as an illustrative example. In some examples, the time slot can be defined according to a specified number of OFDM symbols with a given cyclic prefix (CP) length. For example, a time slot can include 7 or 14 OFDM symbols with a nominal CP. Additional examples may include micro-time slots with shorter durations (e.g., one or two OFDM symbols). In some cases, these micro-time slots may be sent by occupying resources scheduled for ongoing time slot transmissions for the same UE or for different UEs. Any number of resource blocks can be utilized within a subframe or time slot.

[0127] An expanded view of one of the time slots 310 shows that the time slot 310 includes a control region 312 and a data region 314. In general, the control region 312 may carry a control channel (e.g., a PDCCH), and the data region 314 may carry a data channel (e.g., a PDSCH or a PUSCH). Of course, a time slot may contain all DL, all UL, or at least one DL portion and at least one UL portion. Figure 3 The structure shown in is only an example, and a different time slot structure may be utilized, and a different time slot structure may include one or more regions in each of the control region and the data region.

[0128] Despite Figure 3 Although not shown in the figure, each RE 306 within the RB 308 may be scheduled to carry one or more physical channels (including control channels, shared channels, data channels, etc.). Other REs 306 within the RB 308 may also carry pilot or reference signals (including but not limited to demodulation reference signals (DMRS), control reference signals (CRS), or sounding reference signals (SRS)). These pilot or reference signals may provide a receiving device with channel estimation for the corresponding channel, which may enable coherent demodulation / detection of control and / or data channels within the RB 308.

[0129] In some examples, time slot 310 may be used for broadcast or unicast communication. In a V2X or D2D network, broadcast communication may refer to point-to-multipoint transmission from one device (e.g., vehicle, base station (e.g., RSU, gNB, eNB, etc.), UE, or other similar device) to other devices. Unicast communication may refer to point-to-point transmission from one device to a single other device.

[0130] In one example, the control region 312 of the time slot 310 may include a physical downlink control channel (PDCCH), which includes downlink control information (DCI) sent by a base station (e.g., gNB, eNB, RSU, etc.) toward one or more UEs in a set of UEs, and the set of UEs may include one or more sidelink devices (e.g., V2X / D2D devices). In some examples, the DCI may include synchronization information for synchronizing communications performed by multiple sidelink devices on the sidelink channel. In addition, the DCI may include scheduling information indicating one or more resource blocks allocated to the sidelink device for sidelink communication within the control region 312 and / or the data region 314. For example, the control region 312 of the time slot may also include control information sent by the sidelink device on the sidelink channel, and the data region 314 of the time slot 310 may include data sent by the sidelink device on the sidelink channel. In some examples, the control information may be sent within a physical sidelink control channel (PSCCH), and the data may be sent within a physical sidelink shared channel (PSSCH).

[0131] In a DL transmission (e.g., over a Uu interface), a transmitting device (e.g., a scheduling entity) may allocate one or more REs 306 (e.g., within a control region 312) to carry DL control information to one or more scheduled entities, including one or more DL control channels (such as PBCH; and / or a physical downlink control channel (PDCCH), etc.). The transmitting device may also allocate one or more REs 306 to carry other DL signals, such as DMRS; phase tracking reference signal (PT-RS); channel state information-reference signal (CSI-RS); primary synchronization signal (PSS); and secondary synchronization signal (SSS).

[0132] The PDCCH may carry downlink control information (DCI), including but not limited to power control commands, scheduling information, grants and / or assignments of REs for DL ​​transmissions and UL transmissions. The PHY carries HARQ feedback transmissions, such as acknowledgments (ACKs) or negative acknowledgments (NACKs). HARQ is a technology well known to those of ordinary skill in the art, in which the integrity of packet transmissions may be checked for accuracy at the receiving side (e.g., using any appropriate integrity check mechanism, such as a checksum or cyclic redundancy check (CRC)). If the integrity of the transmission is confirmed, an ACK may be sent, and if the integrity of the transmission is not confirmed, a NACK may be sent. In response to the NACK, the transmitting device may send a HARQ retransmission, which may implement append combining, incremental redundancy, and the like.

[0133] In an UL transmission (e.g., via a Uu interface), a transmitting device (e.g., a scheduled entity) may utilize one or more REs 306 to carry UL control information including one or more UL control channels (such as a physical uplink control channel (PUCCH)) to a scheduling entity. The UL control information may include a variety of packet types and categories, including pilots, reference signals, and information configured to enable or assist in decoding uplink data transmissions. For example, the UL control information may include a DMRS or an SRS. In some examples, the control information may include a scheduling request (SR), i.e., a request for a scheduling entity to schedule an uplink transmission. Here, in response to the SR sent on the control channel, the scheduling entity may send downlink control information, which may schedule resources for uplink packet transmissions. The UL control information may also include HARQ feedback, channel state feedback (CSF), or any other appropriate UL control information.

[0134] In addition to control information, one or more REs 306 (e.g., within the data region 314) may also be allocated for user data or traffic data. Such traffic may be carried on one or more traffic channels (e.g., for DL ​​transmission, PDSCH; or for UL transmission, physical uplink shared channel (PUSCH)). In some examples, one or more REs 306 within the data region 314 may be configured to carry SIBs (e.g., SIB1), which carry system information that may enable access to a given cell.

[0135] The physical channels described above are typically multiplexed and mapped to transport channels for processing at the medium access control (MAC) layer. The transport channels carry blocks of information called transport blocks (TBs). The transport block size (TBS), which may correspond to the number of bits of information, may be a controlled parameter based on the modulation and coding scheme (MCS) and the number of RBs in a given transmission.

[0136] References Figure 1-3 The channels or carriers described are not necessarily all of the channels or carriers that may be utilized between a scheduling entity and a scheduled entity, and one of ordinary skill in the art will recognize that other channels or carriers may be utilized in addition to those shown, such as other traffic, control, and feedback channels.

[0137] In some aspects of the present disclosure, the scheduling entity and / or the scheduled entity may be configured for beamforming and / or multiple-input multiple-output (MIMO) techniques. Figure 4 An example of a wireless communication system 400 that supports beamforming and / or MIMO is shown. In a MIMO system, a transmitter 402 includes multiple transmit antennas 404 (e.g., N transmit antennas), and a receiver 406 includes multiple receive antennas 408 (e.g., M receive antennas). Therefore, there are N×M signal paths 410 from the transmit antennas 404 to the receive antennas 408. Each of the transmitter 402 and the receiver 406 can be implemented, for example, within a scheduling entity, a scheduled entity, or any other suitable wireless communication device.

[0138] The use of this multi-antenna technology enables wireless communication systems to utilize the spatial domain to support spatial multiplexing, beamforming, and transmit diversity. Spatial multiplexing can be used to simultaneously send different data streams (also referred to as layers) on the same time-frequency resources. Data streams can be sent to a single UE to increase the data rate, or data streams can be sent to multiple UEs to increase the overall system capacity, the latter being referred to as multi-user MIMO (MU-MIMO). This is achieved by spatially precoding each data stream (i.e., multiplying the data stream by different weights and phase shifts) and then sending each spatially precoded stream through multiple transmit antennas on the downlink. The spatially precoded data streams arrive at UEs with different spatial signatures, which enables each UE in the UE to recover one or more data streams destined for the UE. On the uplink, each UE sends a spatially precoded data stream, which enables the base station to identify the source of each spatially precoded data stream.

[0139] The number of data streams or layers corresponds to the rank of transmission. Typically, the rank of the wireless communication system 400 (MIMO system) is limited by the number of transmit antennas 404 or receive antennas 408 (whichever is lower). In addition, the channel conditions at the UE and other considerations (such as the available resources at the base station) may also affect the transmission rank. For example, the rank (and therefore the number of data streams) assigned to a specific UE on the downlink can be determined based on a rank indicator (RI) sent from the UE to the base station. The RI can be determined based on the antenna configuration (e.g., the number of transmit antennas and receive antennas) and the measured signal to interference plus noise ratio (SINR) on each receive antenna in the receive antenna. The RI can indicate, for example, the number of layers that can be supported under the current channel conditions. The base station can use the RI and resource information (e.g., the amount of available resources and data to be scheduled for the UE) to assign the rank of transmission to the UE.

[0140] In one example, if Figure 4 As shown, a rank-2 spatial multiplexing transmission on a 2x2 MIMO antenna configuration will send one data stream from each transmit antenna 404. Each data stream follows a different signal path 410 to each receive antenna 408. The receiver 406 can then reconstruct the data stream using the signal received from each receive antenna 408.

[0141] Beamforming is a signal processing technique that can be used at a transmitter 402 or a receiver 406 to shape or direct an antenna beam (e.g., a transmit beam or a receive beam) along a spatial path between the transmitter 402 and the receiver 406. Beamforming can be achieved by combining signals transmitted via antennas 404 or 408 (e.g., antenna elements of an antenna array module) so that some of the signals experience constructive interference and other signals experience destructive interference. In order to produce the desired constructive / destructive interference, the transmitter 402 or the receiver 406 can apply an amplitude and / or phase offset to the signal sent or received from each of the antennas 404 or 408 associated with the transmitter 402 or the receiver 406.

[0142] In 5G New Radio (NR) systems (especially for systems above 6 GHz or mmWave), beamformed signals can be used for most downlink channels (including the physical downlink control channel (PDCCH) and the physical downlink shared channel (PDSCH)). In addition, broadcast control information (such as synchronization signal blocks (SSBs), slot format indicators (SFIs), and paging information) can be sent in a beam scanning manner so that all scheduled entities (UEs) in the coverage area of ​​a transmit reception point (TRP) (e.g., a gNB) can receive the broadcast control information. In addition, for UEs configured with beamforming antenna arrays, beamformed signals can also be used for uplink channels (including the physical uplink control channel (PUCCH) and the physical uplink shared channel (PUSCH)).

[0143] A base station (e.g., a gNB) may typically be able to communicate with a UE using transmit beams (e.g., downlink transmit beams) of different beam widths. For example, a base station may be configured to use a wider beam when communicating with a UE in motion and a narrower beam when communicating with a stationary UE. The UE may also be configured to receive signals from the base station using one or more downlink receive beams. In some examples, in order to select one or more downlink transmit beams and one or more downlink receive beams for communication with the UE, the base station may send a reference signal (such as an SSB or CSI-RS) on each of the multiple downlink transmit beams in a beam scanning manner. The UE may measure a reference signal received power (RSRP) on each of the downlink transmit beams using one or more downlink receive beams on the UE, and send a beam measurement report to the base station indicating the RSRP of each of the measured downlink transmit beams. The base station may then select one or more serving downlink beams (e.g., a downlink transmit beam and a downlink receive beam) for communication with the UE based on the beam measurement report. The resulting selected downlink transmit beam and downlink receive beam may form a downlink beam pair link. In other examples, when the channel is reciprocal, the base station may derive a specific downlink beam for communication with the UE based on uplink measurements of one or more uplink reference signals, such as a sounding reference signal (SRS).

[0144] Similarly, an uplink beam (e.g., an uplink transmit beam at a UE and an uplink receive beam at a base station) may be selected by measuring the RSRP of a received uplink reference signal (e.g., SRS) or a downlink reference signal (e.g., SSB or CSI-RS) during uplink or downlink beam scanning. For example, a base station may determine an uplink beam by uplink beam management via SRS beam scanning with measurement at the base station or by downlink beam management via SSB / CSI-RS beam scanning with measurement at the UE. When uplink beam management is implemented, the selected uplink beam may be indicated by a selected SRS resource (e.g., a time-frequency resource used for transmission of the SRS), or when downlink beam management is implemented, the selected uplink beam may be indicated by a selected SSB / CSI-RS resource. For example, the selected SSB / CSI-RS resource may have a spatial relationship with a selected uplink transmit beam (e.g., an uplink transmit beam used for PUCCH, SRS, and / or PUSCH). The resulting selected uplink transmit beam and uplink receive beam may form an uplink beam pair link.

[0145] Figure 5 5 is a diagram illustrating communication between a base station 504 and a UE 502 using beamformed signals according to some aspects. The base station 504 may be a Figure 1 , Figure 2 , Figure 6A-9 , Figure 12-15 , Fig.17 , Fig. 22 , Fig.26 and Fig.30 Any of the base stations (e.g., gNBs) or scheduling entities shown in any of the figures, and UE 502 may be in Figure 1 , Figure 2 , Figure 6A-9 , Figure 12-15 , Fig.17 , Fig.18 , Fig.26 and Fig.28 Any one of the UEs or scheduled entities shown in any of the figures.

[0146] exist Figure 5In the example shown in , the base station 504 is configured to generate multiple beams 506a-506h, each beam being associated with a different beam direction. In addition, the UE 502 is configured to generate multiple beams 508a-508e, each beam being associated with a different beam direction. The base station 504 and the UE 502 can use a downlink beam management scheme and / or an uplink beam management scheme to select one or more beams 506a-506h on the base station 504 and one or more beams 508a-508e on the UE 502 for transmitting uplink signals and downlink signals therebetween.

[0147] In an example of a downlink beam management scheme for selecting a downlink beam, the base station 504 may be configured to scan or transmit on each of the multiple downlink transmit beams 506a-506h during one or more synchronization slots. For example, the base station 504 may transmit a reference signal (such as an SSB or CSI-RS) on each beam in different beam directions during the synchronization slot. The transmission of the beam reference signal may occur periodically (e.g., as configured by the gNB via radio resource control (RRC) signaling), semi-persistently (e.g., as configured by the gNB via RRC signaling and activated / deactivated via medium access control-control element (MAC-CE) signaling), or aperiodically (e.g., as triggered by the gNB via downlink control information (DCI)). It should be noted that although some beams are shown as being adjacent to each other, this arrangement may be different in different aspects. For example, the downlink transmit beams 506a-506h transmitted during the same symbol may not be adjacent to each other. In some examples, base station 504 may transmit more or fewer beams distributed in all directions (e.g., 360 degrees).

[0148] In addition, the UE 502 is configured to receive downlink beam reference signals on multiple downlink receive beams 508a-508e. In some examples, the UE 502 searches for and identifies each downlink transmit beam in the downlink transmit beams 506a-506h based on the beam reference signals. The UE 502 then performs beam measurements (e.g., RSRP, SINR, reference signal received quality (RSRQ), etc.) on the beam reference signals on each downlink receive beam in the downlink receive beams 508a-508e to determine the corresponding beam quality of each downlink transmit beam in the downlink transmit beams 506a-506h as measured on each downlink receive beam in the downlink receive beams 508a-508e.

[0149] The UE 502 may generate a beam measurement report and send the beam measurement report to the base station 504, the beam measurement report including a corresponding beam index and beam measurement for each downlink transmit beam 506a-506h on each downlink receive beam 508a-508e. The base station 504 may then select one or more downlink transmit beams on which to send unicast downlink control information and / or user data traffic to the UE 502. In some examples, the selected downlink transmit beam has the highest gain from the beam measurement report. In some examples, the UE 502 may also identify the downlink transmit beam selected by the base station based on the beam measurement. The transmission of the beam measurement report may occur periodically (e.g., as configured by the gNB via RRC signaling), semi-persistently (e.g., as configured by the gNB via RRC signaling and activated / deactivated via MAC-CE signaling), or aperiodically (e.g., as triggered by the gNB via DCI).

[0150] The base station 504 or UE 502 may also select a corresponding downlink receive beam on the UE 502 for each selected serving downlink transmit beam to form a corresponding downlink beam pair link (BPL) for each selected serving downlink transmit beam. For example, the UE 502 may utilize beam measurements to select a corresponding downlink receive beam for each serving downlink transmit beam. In some examples, the selected downlink receive beam to be paired with a particular downlink transmit beam may have the highest gain for the particular downlink transmit beam.

[0151] In one example, a single downlink transmit beam (e.g., beam 506d) on the base station 504 and a single downlink receive beam (e.g., beam 508c) on the UE may form a single downlink BPL for communication between the base station 504 and the UE 502. In another example, multiple downlink transmit beams (e.g., beams 506c, 506d, and 506e) on the base station 504 and a single downlink receive beam (e.g., beam 508c) on the UE 502 may form respective downlink BPLs for communication between the base station 504 and the UE 502. In another example, multiple downlink transmit beams (e.g., beams 506c, 506d, and 506e) on the base station 504 and multiple downlink receive beams (e.g., beams 508c and 508d) on the UE 502 may form multiple downlink BPLs for communication between the base station 504 and the UE 502. In this example, the first downlink BPL may include a downlink transmit beam 506c and a downlink receive beam 508c, the second downlink BPL may include a downlink transmit beam 508d and a downlink receive beam 508c, and the third downlink BPL includes a downlink transmit beam 508e and a downlink receive beam 508d.

[0152] When the channel is reciprocal, the above-described downlink beam management scheme may also be used to select one or more uplink BPLs for uplink communication from UE 502 to base station 504. For example, the downlink BPL formed by beams 506d and 508e may also serve as an uplink BPL. Here, beam 508c is used as an uplink transmit beam, and beam 506d is used as an uplink receive beam.

[0153] In an example of an uplink beam management scheme, the UE 502 may be configured to scan or transmit on each of the multiple uplink transmit beams 508a-508e. For example, the UE 502 may transmit an SRS on each beam in a different beam direction. In addition, the base station 504 may be configured to receive an uplink beam reference signal on the multiple uplink receive beams 506a-506h. In some examples, the base station 504 searches for and identifies each of the uplink transmit beams 508a-508e based on the beam reference signal. The base station 504 then performs beam measurements (e.g., RSRP, SINR, RSRQ, etc.) on the beam reference signals on each of the uplink receive beams 506a-506h to determine the corresponding beam quality of each of the uplink transmit beams 508a-508e as measured on each of the uplink receive beams 506a-506h.

[0154] The base station 504 may then select one or more uplink transmit beams on which the UE 502 will send unicast downlink control information and / or user data traffic to the base station 504. In some examples, the selected uplink transmit beam has the highest gain. The base station 504 may also select a corresponding uplink receive beam on the base station 504 for each selected serving uplink transmit beam to form a corresponding uplink beam pair link (BPL) for each selected serving uplink transmit beam. For example, the base station 504 may utilize beam measurements to select a corresponding uplink receive beam for each serving uplink transmit beam. In some examples, the selected uplink receive beam to be paired with a particular uplink transmit beam may have the highest gain for that particular uplink transmit beam.

[0155] The base station 504 may then notify the UE 502 of the selected uplink transmit beam. For example, the base station 504 may provide an SRS resource identifier (ID) identifying the SRS transmitted on the selected uplink transmit beam. In some examples, the base station 504 may apply each selected uplink transmit beam (and corresponding uplink receive beam) to an uplink signal (e.g., PUCCH, PUSCH, SRS, etc.), and send the corresponding SRS resource ID associated with the selected uplink transmit beam applied to each uplink signal to the UE 502. When the channel is reciprocal, the above-described uplink beam management scheme may also be used to select one or more downlink BPLs for downlink communication from the base station 504 to the UE 502. For example, an uplink BPL may also be used as a downlink BPL.

[0156] As mentioned above, the UE and the base station (e.g., gNB) can use full-duplex communication. Fig. 6A 6 is a schematic diagram depicting an antenna array 600 of a TRP atop a tower 602 in accordance with some aspects of the present disclosure. The antenna array 600 is divided into two panels (Panel 1 604, Panel 2 606) with a physical separation 608 therebetween. Each of the two panels may be a subarray of antennas. A given panel may transmit and / or receive a beam or group of beams. In other examples, a different number of panels may be used.

[0157] Other types of devices may include multi-panel antenna arrays for full-duplex communications. For example, a UE may have a first panel on one side of the UE and a second panel on an opposite side of the UE. As another example, a UE may have four panels, one at each corner of the UE.

[0158] Figure 6Bis to depict two panels ( Fig. 6A FIG. 1 is a diagram of a transmit configuration or receive configuration of a UE (e.g., panel 1 604 and panel 2 606 or two panels on a UE, etc.). The transmit (TX) and receive (RX) configurations of the two panels are depicted for various DL and UL channels, as may be implemented in a device (e.g., a scheduling entity or a scheduled entity) that implements flexible TDD according to some aspects of the present disclosure.

[0159] As mentioned above, in some examples, flexible TDD can involve using two panels to operate in TDD mode (where two panels on the gNB and one or more panels on the UE are configured for DL ​​or UL) or SBFD mode (where one panel on each of the gNB and the UE is configured for UL and the other panel on each of the gNB and the UE is configured for DL), as described below with reference to Figure 6B as described.

[0160] exist Figure 6B , as an example of a TDD mode showing DL transmissions, when the antenna array 600 is communicating in only a single direction at a time, both panel 1 604 and panel 2 606 can be configured for unidirectional communication. For example, as an example of a DL transmission during TDD mode, both panels 604 and 606 can be configured to send DL control 610, DL data 612, and DL data 613. Figure 6B In the center of FIG. 6 , when the antenna array 600 is simultaneously transmitting a combination of DL data 615 and DL control 617 and receiving UL data (e.g., PUSCH 614) and UL control 618, panel 1 604 can be configured for DL ​​transmission (i.e., TX) and panel 2 606 can be configured for UL reception (i.e., RX). Figure 6B , when the antenna array 600 is only receiving UL data (e.g., PUSCH 620) and UL control 622, both panel 1 604 and panel 2 606 can be configured for UL reception. Thus, the antenna array 600 is configured for both TDD and full-duplex operation (e.g., flexible TDD). The physical separation 608 between panel 1 604 and panel 2 606 can provide increased isolation (e.g., increased isolation greater than about 50 dB) between the panels when compared to two panels without physical separation 608. The above discussion can also be applied to antenna arrays in another type of device (e.g., UE, where references to DL and UL are reversed).

[0161] Fig. 7A , Figure 7B and Figure 7C7 is a diagram of a wireless communication network 700 and different interference sources and different gNB configurations for a half-duplex UE 706, a first full-duplex UE 712, a second full-duplex UE 708, according to some aspects of the present disclosure. UE 706, 708, or 712 may correspond to Figure 1 , Figure 2 , Figure 5 -6. Figure 8-9 , Figure 12-15 , Fig.17 , Fig.18 , Fig.26 and Fig.28 Any one of the UEs or scheduled entities shown in any of the figures.

[0162] exist Fig. 7A , a full-duplex gNB 702 (e.g., a scheduling entity) is transmitting to a half-duplex UE 706. During the time of the transmission from the full-duplex gNB 702 to the half-duplex UE 706, the full-duplex gNB 702 is receiving at its receiver (not shown) self-interference 710 from its own transmission to the half-duplex UE 706 as well as interference from a neighboring gNB 704 and an uplink transmission from a second full-duplex UE 708. The half-duplex UE 706 is also receiving interference from the second full-duplex UE 708 and the neighboring gNB 704. Because it is a half-duplex UE, the half-duplex UE 706 is not transmitting during the time of the transmission from the full-duplex gNB 702 to the half-duplex UE 706, and therefore, the half-duplex UE 706 does not receive self-interference. The full-duplex gNB 702 and the neighboring gNB 704 may each correspond to a transmission from the second full-duplex UE 708 to the half-duplex UE 706. Figure 1 , Figure 2 , Figure 5 -6. Figure 8-9 , Figure 12-15 , Fig.17 , Fig. 22 , Fig.26 and Fig.30 Any of the base stations or scheduling entities shown in any of the figures may be associated with the same base station (e.g., a single gNB) or may each correspond to a separate base station.

[0163] exist Figure 7B, a full-duplex gNB 702 is sending a downlink transmission to a first full-duplex UE 712. During the time of the transmission of the downlink transmission from the full-duplex gNB 702 to the first full-duplex UE 712, the full-duplex gNB 702 is receiving at its receiver (not shown) a simultaneous uplink transmission from the first full-duplex UE 712. Concurrently with the just-mentioned simultaneous downlink and uplink transmissions, the first full-duplex UE 712 is receiving at its receiver (not shown) self-interference 714 from its own transmission to the full-duplex gNB 702 as well as interference from the neighboring gNB 704 and interference from the second full-duplex UE 708.

[0164] Figure 7C A full-duplex gNB configured as a multi-TRP base station including a first TRP 702a and a second TRP 702b is shown. The first TRP 702a is receiving an uplink transmission from a first full-duplex UE 712. During the time of this uplink transmission to the transmission of the first TRP 702a, the first full-duplex UE 712 is also receiving a transmission from the second TRP 70b. In addition to the transmission received from the second TRP 718b, the first full-duplex UE 712 is also receiving self-interference 716 at its receiver (not shown) from its own transmission to the first TRP 702a.

[0165] Traditionally, it can be targeted Figure 7A-7B Different frequency bands are allocated for transmission to mitigate the above interference. Fig. 7A For a half-duplex UE 706, interference from a neighboring gNB 704 and a second full-duplex UE 708 may be mitigated if the interference is at a frequency other than the frequency occupied by the downlink transmission from the full-duplex gNB 702 to the half-duplex UE 706. Similarly, for Figure 7B and Figure 7C For a first full-duplex UE 712, interference can be mitigated if self-interference 716 from the first full-duplex UE 712, interference from a neighboring gNB 704, and / or interference from a second full-duplex UE 708 are at frequencies other than the frequencies occupied by downlink transmissions from the full-duplex gNB 702 to the half-duplex UE 706.

[0166] The present disclosure relates in some aspects to FD capabilities for wireless communications and interference mitigation for FD communications. Various aspects of the present disclosure may be applicable to FD operations with simultaneous uplink and downlink transmissions in FR2 and / or other frequency bands, which may be referred to herein as "FD mode". FD mode may include SBFD in flexible TDD, but may also include FDD in paired spectrum, SBFD in unpaired spectrum, partially overlapping spectrum FD, completely overlapping spectrum FD, in-band FD, or other types of full-duplex operations.

[0167] This FD capability can be implemented at the base station (e.g., gNB), the UE, or both. For example, the UE can send uplink signals from one panel and receive downlink signals at another panel.

[0168] In some aspects, full-duplex performance can depend on beam separation and / or other factors. For example, a first beam pair having more spatial separation than a second beam pair can have less self-interference than the second beam pair.

[0169] In some aspects, the FD capability can reduce latency. For example, compared to half-duplex communication in which only some of the time slots are reserved for uplink transmission, in FD communication, the UE may not need to wait for an available uplink time slot to send uplink information, thereby reducing latency for uplink transmission. As another example, the UE can receive downlink signals in a time slot that is dedicated as an uplink-only time slot, thereby reducing latency for downlink transmission.

[0170] In some aspects, FD capabilities can improve spectral efficiency (e.g., per cell, per UE, etc.). For example, in FD communications, the same time slot and / or frequency resources can be used concurrently for uplink transmissions and downlink transmissions. Here, the downlink and uplink frequency bands in FD communications can be completely overlapped, partially overlapped, or separated by a guard band therebetween. As a result, communication efficiency is improved because both frequency resources and time resources are utilized concurrently.

[0171] The present disclosure relates in some aspects to mitigating interference for FD communications and other types of communications. As discussed herein, the interference may be based on one or more of relative timing of uplink and downlink transmissions, leakage, or other factors.

[0172] During operation, the 5G NR uplink allows for uplink intra-cell orthogonality so that uplink transmissions received from different devices within a cell do not cause interference to each other. A feature used for this uplink orthogonality is that the uplink slot boundaries for a given digital scheme are time-aligned (approximately) at the base station. To ensure this receiver-side time alignment, 5G NR includes a mechanism for sending a timing advance (TA) signal or indication. While similar to previous technologies such as LTE, the timing advance in 5G NR is different in that it uses different timing advance step sizes for different digital schemes.

[0173] Typically, a timing advance is a negative offset applied at a wireless device (e.g., UE) between the start of a downlink (DL) symbol (or subframe) and the start of a symbol in the uplink (UL) as observed by the device. By appropriately controlling the offset for each device, the network (e.g., base station or gNB) can control the timing of signals received at the base station or gNB from various devices (UEs) in the cell being served. Devices located far from the base station experience larger propagation delays and, therefore, should start their uplink transmissions slightly earlier than devices located closer to the base station that have smaller propagation delays.

[0174] Figure 8 An example of downlink timing and uplink timing for half-duplex communication 800 is shown. In this example, a first UE (UE1) is positioned closer to the gNB than a second UE (UE2). Time-aligned downlink and uplink transmissions are shown relative to time t1 802, which represents a subframe boundary at the gNB.

[0175] As represented by downlink subframe 804 (designated as downlink subframe #n in this example), transmission of a downlink subframe at the gNB begins at time t1 802. Downlink subframe 806 represents delayed reception of downlink subframe 804 at the first UE (UE1). Subframe 806 is received at the first UE (UE1) after a propagation delay δ1 808, as indicated.

[0176] For half-duplex operation, it is desirable to receive uplink transmissions at the gNB that are time-aligned with the subframe boundaries of the gNB. To this end, based on the timing advance command received from the gNB, the first UE (UE1) will send an uplink subframe 810 at a time that is ahead of the subframe boundary of the gNB by a propagation delay δ1. Uplink subframe 812 represents the delayed reception of uplink subframe 810 at the gNB. As indicated, the uplink subframe is received in time alignment with the subframe boundary of the gNB. For convenience, the transmission of the uplink subframe is depicted relative to time t1 802. However, it should be understood that in a half-duplex system, the relative subframe boundary for the uplink transmission may be later in time than time t1 802.

[0177] Figure 8 It is also shown that the propagation delay δ2 from the gNB to the second UE (UE2) is less than the propagation delay δ1 (due to the second UE (UE2) being closer to the gNB than the first UE (UE1). Downlink subframe 814 represents the delayed reception of downlink subframe 804 at the second UE (UE2). As indicated, subframe 814 is received at the second UE (UE2) after the propagation delay δ2 816.

[0178] Based on the timing advance command received from the gNB, the second UE (UE2) will send an uplink subframe 818 at a time that is ahead of the subframe boundary of the gNB by a propagation delay δ2. Uplink subframe 820 represents the delayed reception of uplink subframe 818 at the gNB. As indicated, the uplink subframe is received in time alignment with the subframe boundary of the gNB. For convenience, the transmission of the uplink subframe is again depicted relative to time t1 802. However, it should be understood that in a half-duplex system, the relative subframe boundary for the uplink transmission will be later in time than time t1 802.

[0179] Communication between a base station and a UE may involve the transmission and reception of orthogonal frequency division multiplexing (OFDM) symbols. The transmitted OFDM symbols may be subject to reflections and other channel-related effects, which cause some of the energy of the transmitted symbols to arrive at a receiver (e.g., a receiver at a UE or base station) using different paths. These multipath components of the symbols generate interference at the receiver. This interference may be referred to as inter-symbol interference (ISI) because the energy of one OFDM symbol may interfere with the reception of another OFDM symbol. The time difference between the arrival times of these multipath components at the receiver depends on the delay spread of the channel.

[0180] To mitigate this ISI, each OFDM symbol sent by the transmitter may be preceded by a cyclic prefix (CP). In some examples, the CP for a given OFDM symbol contains a repetition of information from the end of that OFDM symbol. If the cyclic prefix is ​​at least as long as the delay spread, multipath effects may be eliminated during the cyclic prefix. In this case, the receiver may be able to decode the OFDM symbol efficiently.

[0181] As mentioned above, during full-duplex communication between a UE and a base station, uplink transmissions by the UE may interfere with the UE's reception of downlink transmissions from the base station. For example, the UE may transmit on a first antenna panel and receive on a second antenna panel. In some cases, some of the energy from the uplink transmission on the first antenna panel may be received at the second antenna panel. Therefore, the UE's uplink transmissions (e.g., transmitted uplink OFDM symbols) may interfere with the UE's reception of downlink transmissions (e.g., received downlink OFDM symbols) from the base station. Similar self-interference may be experienced at the base station.

[0182] Fig. 9 An example of downlink timing and uplink timing for full-duplex communication 900 is shown, showing uplink transmissions by a UE that may interfere with downlink reception at the UE. As represented by downlink subframe 904 (designated as downlink subframe #n in this example), transmission of a downlink subframe at the gNB begins at time t1 902. Downlink subframe 906 represents delayed reception of downlink subframe 904 at the UE. Subframe 906 is received at the UE after a propagation delay δ1 908, as indicated.

[0183] For full-duplex operation, in some cases it may be desirable to receive uplink transmissions at the gNB that are time-aligned with the subframe boundary of the gNB. To this end, the UE may send uplink subframe 910 at a time that is ahead of the subframe boundary of the gNB by a propagation delay δ1. Uplink subframe 912 represents the delayed reception of uplink subframe 910 at the gNB. As indicated, the uplink subframe is received in time alignment with the subframe boundary of the gNB.

[0184] Fig. 9 Also shown is that for a full-duplex scenario, the UE may receive energy from uplink subframe 910, as represented by uplink subframe 914. For example, the UE may receive uplink subframe 914 at the same panel that the UE used to receive downlink subframe 906.

[0185] As discussed herein, reception of an uplink subframe at a UE (e.g., reception of energy from an uplink transmission of the UE) may result in ISI at the UE's receiver. For example, if the time period δ2 916 between the UE's reception of a downlink subframe 906 and the UE's reception of an uplink subframe 914 is greater than a defined time period (e.g., the length of a cyclic prefix, also referred to as a cyclic prefix period), then ISI may degrade the UE's reception of the downlink subframe 906. The time period δ2 916 may be referred to herein as a receive timing difference.

[0186] The UE may experience forms of interference other than self-interference. For example, when the UE is attempting to receive a downlink transmission performed by one TRP, the UE may receive energy from a downlink transmission performed by another TRP. The interference mitigation techniques described herein may also be applicable to these scenarios. In addition, the interference mitigation techniques described herein may also be applicable to interference mitigation at the base station.

[0187] In some aspects, the present disclosure relates to mitigating interference in scenarios where the receive timing difference is greater than the cyclic prefix period. For example, one or more of the cyclic prefix length, subcarrier spacing, beam pairs, or frequency domain separation may be changed to mitigate the impact of ISI at the UE or base station.

[0188] In addition, despite Fig. 9 A scenario is shown where the downlink subframes and uplink subframes are time aligned at the gNB, but in other scenarios, the downlink subframes and uplink subframes may not be time aligned at the gNB. For example, the UE may send an uplink subframe that is closer in time to the subframe boundary to reduce the receive timing difference between receiving the downlink subframe at the UE and receiving the interfering uplink subframe at the UE. For example, to reduce ISI, the timing of the uplink transmission may be configured (e.g., the duration of δ1 may be reduced) such that δ2 is less than the cyclic prefix period.

[0189] In some examples, the UE may determine the receive timing difference (e.g., δ2) by performing a signal to interference plus noise ratio (SINR) measurement or other types of signal measurements. For example, the UE may measure a downlink reference signal sent by a base station and an uplink reference signal sent from an uplink beam to a receive beam of the UE. In some examples, the measured downlink reference signal is a channel state information-reference signal (CSI-RS). In some examples, the measured uplink reference signal is a sounding reference signal (SRS). In other examples, other types of signal measurements may be used.

[0190] The UE may use one panel (e.g., an antenna array) to send an uplink reference signal and another panel to measure the DL reference signal and the uplink reference signal. Then, the timing difference between the time when the UE receives the downlink signal and the time when the UE receives its own uplink signal may be measured. Based on the measurement, the UE and / or the base station may adjust at least one communication configuration to ensure that the timing difference does not exceed a specified value. For example, the UE and / or the base station may attempt to ensure that the received timing difference does not exceed the duration of the cyclic prefix used by the UE and / or the base station for transmission. In this way, when the UE is receiving a downlink transmission from the base station, the impact of ISI on the uplink transmission from the UE may be reduced.

[0191] In 5G NR, the duration of the cyclic prefix used for a symbol depends on the subcarrier spacing (SCS) used to transmit the symbol. Fig.10 Examples of corresponding cyclic prefix durations for subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz are shown. For example, for a subcarrier spacing of 15 kHz, the duration of the cyclic prefix is ​​4.69 microseconds (μs). As another example, for a subcarrier spacing of 120 kHz, the duration of the cyclic prefix is ​​0.57 μs. The corresponding cyclic prefix duration for the subcarrier spacing may be configured (e.g., pre-configured) at the UE by the BS or higher layers. Although not shown, the UE may also be configured with other normal cyclic prefix values ​​and extended cyclic prefix values ​​corresponding to higher frequencies (such as 480 kHz, 960 kHz, etc.) and / or any other suitable subcarrier spacing frequency.

[0192] The subcarrier spacing used affects the distance at which the UE can reliably communicate with the base station. As discussed above, as the distance between the UE and the base station increases, the corresponding propagation delay increases. This in turn will cause the base station to send a larger timing advance (TA) value to the UE, so that the UE will send its uplink transmission faster in time. For example, for a subcarrier spacing of 15kHz, Ts=1 / (2048x15000) seconds=1 / 30720000 seconds. Here, the parameter 2048 corresponds to the normal fast Fourier transform (FFT) size, and the parameter 15000 corresponds to the subcarrier spacing. The granularity 16Ts is given by 0.52μs (corresponding to 78 meters). For a distance of 100 meters between the UE and the base station, the TA can be approximately 0.66μs. For a distance of 200 meters between the UE and the base station, the TA can be approximately 1.33μs.

[0193] In some examples, the expected TA value (or the measured receive timing difference) is less than the duration of the cyclic prefix. Fig.14It can be seen that for a distance of 100 meters from the UE to the base station, a subcarrier spacing of 15kHz, 30kHz or 60kHz may be acceptable. However, in this case, for the timing difference of the TA value at the UE, a SCS of 120kHz, 240kHz or higher may be unacceptable.

[0194] In some aspects, the present disclosure relates to specifying a longer cyclic prefix for certain subcarrier spacings. Fig.11 As shown, a common cyclic prefix may be specified for subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz, as in Fig.10 In addition, an optional extended cyclic prefix may be defined for subcarrier spacings of 120 kHz, 240 kHz, 480 kHz, 960 kHz, and any other suitable subcarrier spacing (e.g., in addition to the extended cyclic prefix previously defined for a subcarrier spacing of 60 kHz).

[0195] By specifying an optional extended cyclic prefix for subcarrier spacing with a shorter cyclic prefix duration, the timing at the UE can be aligned and ISI can be reduced. For example, when the measured receive timing difference is greater than the duration of the normal cyclic prefix, the base station and / or the UE can choose to use the extended cyclic prefix.

[0196] Thus, in some aspects, the present disclosure relates to using an extended cyclic prefix instead of a normal cyclic prefix in certain situations. For example, if the receive timing difference changes (e.g., due to mobility and / or environmental changes), the base station and / or UE may choose to use an extended cyclic prefix instead of a normal cyclic prefix. For example, if the receive timing difference is greater than the duration of the normal cyclic prefix, then a switch to the extended cyclic prefix may be made.

[0197] In some examples, the base station may decide to switch to an extended cyclic prefix. For example, the decision may be made based on a measurement of a receive timing difference by the UE. In this case, the UE may report the measured receive timing difference to the base station. In addition, the base station may indicate to the UE that an extended cyclic prefix will be used.

[0198] In some examples, the UE may decide to switch to an extended cyclic prefix. For example, the decision may be made based on a measurement of a receive timing difference made by the UE. In this case, the UE may send a request to the base station to use an extended cyclic prefix (e.g., instead of a normal cyclic prefix). In addition, the base station may indicate to the UE that the request to use the extended cyclic prefix has been accepted.

[0199] In some examples, the extended cyclic prefix may be configurable based on a UE request or a base station indication. For example, the UE or base station may indicate the duration to be used for the cyclic prefix and the subcarrier spacing (or multiple subcarrier spacings) to which the cyclic prefix applies.

[0200] In some examples, the configurable extended cyclic prefix may be dynamically signaled and / or semi-statically signaled. For example, the base station may send a MAC-CE, DCI, or RRC message to the UE to notify the UE of the configurable extended cyclic prefix to be used (e.g., in response to an autonomous decision made by the base station or in response to a request from the UE). As another example, the UE may send a request for a configurable extended cyclic prefix to the base station via a MAC-CE, UCI, or RRC message.

[0201] Fig.12 1 is a signaling diagram 1200 illustrating an example of extended cyclic prefix related signaling in a wireless communication system including a base station (BS) 1202 and a UE 1204. In some examples, the BS 1202 may correspond to Figure 1 , Figure 2 , Figure 5-9 , Figure 13-15 , Fig.17 , Fig. 22 , Fig.26 and Fig.30 In some examples, UE 1204 may correspond to any of the base stations or scheduling entities shown in any of the figures. Figure 1 , Figure 2 , Figure 5-9 , Figure 13-15 , Fig.17 , Fig.18 , Fig.26 and Fig.28 Any one of the UEs or scheduled entities shown in any of the figures.

[0202] exist Fig.12At optional step 1206 of , UE 1204 may perform protocol layer 1 (L1) signal measurements during full-duplex operation. In some examples, UE 1204 may measure the SINR at a panel (e.g., panel 1) that UE 1204 uses to receive downlink transmissions from BS 1202. For example, as discussed herein, UE 1204 may measure a CSI-RS sent by BS 1202 during downlink transmissions and an SRS sent by UE 1204 (e.g., using panel 2) during uplink transmissions. In some examples, UE 1204 may thereby determine a measured receive timing difference for downlink and uplink transmissions, as discussed herein. For example, UE 1204 may determine a difference between a time at which UE 1204 receives the SRS and a time at which UE 1204 receives the CSI-RS.

[0203] At optional step 1208, UE 1204 may send a measurement report including the measurement information from step 1206 to BS 1202. In some examples, the measurement report may include raw measurement information (e.g., RSRP for CSI-RS and SRS, etc.). In some examples, the measurement report may include an indication of the measured receive timing difference.

[0204] At optional step 1210, UE 1204 may elect to use an extended cyclic prefix (ECP). For example, as discussed above, if the measurement information from step 1206 indicates that the measured receive timing difference is greater than the duration of a normal cyclic prefix (NCP) currently designated for communication with BS 1202, UE 1204 may elect to use the ECP instead of the NCP.

[0205] At optional step 1212, in some examples, UE 1204 can therefore send a request to BS 1202 to use the ECP. For example, UE 1204 can send a MAC-CE, UCI, RRC message, or some other type of message that includes a request to use the ECP. In some examples, the request can be for a configurable ECP. For example, the request can specify a specific ECP and / or a duration of the ECP.

[0206] In some examples, the decision to send a request by UE 1204 (or the selection to perform step 1210) can be based on a threshold. For example, if the measured receive timing difference exceeds a threshold and / or the number of times the measured receive timing difference exceeds the threshold during a period of time is higher than another threshold, UE 1204 can choose to send a request or choose to use ECP. In some examples, BS 1202 can configure UE 1204 with a threshold (e.g., by sending an indication to UE 1204 using any of the signaling discussed herein).

[0207] At step 1214, at a certain point in time (e.g., when BS 1202 schedules communication with UE 1204), BS 1202 selects an SCS to be used for communication (e.g., downlink transmission and / or uplink transmission). The selection of the SCS may depend, for example, on the data rate and / or latency requirements of the traffic to be sent between BS 1202 and UE 1204 and optionally on other factors (e.g., channel conditions, congestion, coverage issues, etc.).

[0208] At step 1216, in some examples, the BS 1202 selects to use an extended cyclic prefix (ECP). For example, if the measurement information received at step 1208 indicates that the measured receive timing difference is greater than the duration of the NCP for the SCS selected at step 1214, the BS 1202 may select to use the ECP instead of the NCP. As another example, if the BS 1202 receives a request from the UE 1204 at step 1212 to use the ECP instead of the NCP, the BS 1202 may select to use the ECP instead of the NCP.

[0209] At step 1218, BS 1202 sends an indication of the selected SCS and ECP to UE 1204. For example, base station 1202 may send a MAC-CE, DCI, RRC message, or some other type of message indicating the SCS and ECP. In some examples, the indication may be for a configurable ECP. For example, the indication may specify a particular ECP and / or a duration of the ECP.

[0210] At step 1220, BS 1202 and UE 1204 communicate using the selected SCS and ECP. To this end, BS 1202 may encode downlink transmissions using the ECP (e.g., transmit OFDM symbols with the ECP) ​​and / or decode uplink transmissions using the ECP (e.g., receive OFDM symbols with the ECP) ​​at step 1222. Similarly, at step 1224, UE 1204 may encode uplink transmissions using the ECP (e.g., transmit OFDM symbols with the ECP) ​​and / or decode downlink transmissions using the ECP (e.g., receive OFDM symbols with the ECP).

[0211] In some aspects, the present disclosure relates to switching to a smaller subcarrier spacing in certain situations. For example, if the receive timing difference changes (e.g., due to mobility and / or environmental changes), the base station and / or UE may choose to use a smaller subcarrier spacing. Here, if the receive timing difference is greater than the duration of the currently used cyclic prefix, a switch to a smaller subcarrier spacing may be made. As discussed above, a smaller subcarrier spacing may have a longer cyclic prefix. Therefore, ISI may be reduced by switching to a smaller subcarrier spacing.

[0212] In some examples, the base station may decide to switch to a smaller subcarrier spacing. For example, the decision may be made based on a measurement of the receive timing difference by the UE. In this case, the UE may report the measured receive timing difference to the base station. In addition, the base station may indicate to the UE that a smaller subcarrier spacing will be used.

[0213] In some examples, the UE may decide to switch to a smaller subcarrier spacing. For example, the decision may be made based on a measurement of the receive timing difference made by the UE. In this case, the UE may send a request to the base station to use a smaller subcarrier spacing. In addition, the base station may indicate to the UE that the request to use a smaller subcarrier spacing has been accepted.

[0214] In some examples, a specific subcarrier spacing may be specified in a UE request or base station indication. For example, a UE or base station may indicate a specific subcarrier spacing to be used. In some examples, a UE or base station may calculate a required subcarrier spacing based on a receive timing difference (e.g., a subcarrier spacing having a cyclic prefix duration less than the measured receive timing difference may be selected).

[0215] In some examples, the change in subcarrier spacing can be dynamically signaled and / or semi-statically signaled. For example, the base station can send a MAC-CE, DCI, or RRC message to the UE to notify the UE to use a lower subcarrier spacing (e.g., in response to an autonomous decision made by the base station or in response to a request from the UE). As another example, the UE can send a request for a lower subcarrier spacing (or a specific subcarrier spacing) to the base station via a MAC-CE, UCI, or RRC message.

[0216] Fig.13 1300 is a signaling diagram illustrating an example of SCS-related signaling in a wireless communication system including a base station (BS) 1302 and a UE 1304. In some examples, the BS 1302 may correspond to Figure 1 , Figure 2 , Figure 5-9 , Fig.12 , Figure 14-15 , Fig.17 and Fig. 22 In some examples, UE 1304 may correspond to any of the base stations or scheduling entities shown in any of the figures. Figure 1 , Figure 2 , Figure 5-9 , Fig.12 , Figure 14-15 , Fig.17 and Fig.18 Any one of the UEs or scheduled entities shown in any of the figures.

[0217] exist Fig.13 At step 1306, UE 1304 may perform protocol layer 1 (L1) signal measurements during full-duplex operation. For example, UE 1304 may perform the above-mentioned Fig.12 The operation is similar to the operation discussed in step 1206.

[0218] At optional step 1308, UE 1304 may send a measurement report including the measurement information from step 1306 to BS 1302. For example, UE 1304 may perform the above-described Fig.12 The operation is similar to the operation discussed in step 1208.

[0219] At optional step 1310, in some examples, UE 1304 may select to use a smaller SCS. For example, as discussed above, if the measurement information from step 1306 indicates that the measured receive timing difference is greater than the duration of a normal cyclic prefix (NCP) currently designated for communication with BS 1302, UE 1304 may select to use a smaller SCS with a longer NCP. In some examples, UE 1304 may identify a particular SCS having an NCP that is longer than the measured receive timing difference.

[0220] At optional step 1312, in some examples, UE 1304 may therefore send a request to BS 1302 to use a smaller SCS. For example, UE 1304 may send a MAC-CE, UCI, RRC message, or some other type of message that includes a request to use a smaller SCS. In some examples, the request may specify a specific SCS that UE 1304 has identified as acceptable or preferred.

[0221] In some examples, the decision to send a request by UE 1304 (or the selection to perform step 1310) can be based on a threshold. For example, if the measured receive timing difference exceeds a threshold and / or the number of times the measured receive timing difference exceeds the threshold during a period of time is higher than another threshold, UE 1304 can choose to send a request or choose to use a smaller SCS. In some examples, BS 1302 can configure UE 1304 with a threshold (e.g., by sending an indication to UE 1304 using any of the signaling discussed herein).

[0222] At step 1314, at a certain point in time (e.g., when BS 1302 schedules communication with UE 1304), in some examples, BS 1302 selects to use a smaller SCS for communication with UE 1304. For example, if the measurement information received at step 1308 indicates that the measured receive timing difference is greater than the duration of the NCP for the SCS selected at step 1314, BS 1302 may select to use an SCS that is smaller than the SCS currently designated for communication with UE 1304. Here, BS 1302 may identify a specific SCS having an NCP longer than the measured receive timing difference. As another example, if BS 1302 receives a request to use a smaller SCS from UE 1304 at step 1312, BS 1302 may select to use a smaller SCS. Here, BS 1302 may identify a specific SCS having an NCP longer than the measured receive timing difference, or BS 1302 may select to use the SCS designated by the request.

[0223] At step 1316, the BS 1302 sends an indication of the smaller SCS to the UE 1304. For example, the base station 1302 may send a MAC-CE, a DCI, an RRC message, or some other type of message indicating the SCS.

[0224] At step 1318, the BS 1302 and the UE 1304 communicate using the smaller SCS. To this end, at step 1320, the BS 1302 may encode a downlink transmission using the smaller SCS (e.g., send OFDM symbols according to the SCS) and / or decode an uplink transmission using the smaller SCS (e.g., receive OFDM symbols according to the SCS). Similarly, at step 1322, the UE 1304 may encode an uplink transmission using the smaller SCS (e.g., send OFDM symbols according to the SCS) and / or decode a downlink transmission using the smaller SCS (e.g., receive OFDM symbols according to the SCS).

[0225] In some aspects, the present disclosure relates to switching from a first beam pair to a second beam pair in certain circumstances. In some circumstances, one beam pair may have lower interference (leakage) than another beam pair. In some circumstances, one beam pair may have better timing characteristics (e.g., shorter measured receive timing difference) than another beam pair. Thus, ISI may be reduced by switching to a different beam pair.

[0226] If the receive timing difference changes (e.g., due to changing clutter), the base station and / or UE may choose to switch to a different beam pair. Here, if the receive timing difference is greater than the duration of the currently used cyclic prefix, a different beam pair may be switched to.

[0227] Fig.14 1404. FIG. 1405 is a conceptual diagram of beam pair switching in a wireless communication system 1400 including a UE 1402 and a base station (BS) 1404. In some examples, the UE 1402 may correspond to a Figure 1 , Figure 2 , Figure 5-9 , Figure 12-13 , Fig.15 , Fig.17 and Fig.18 In some examples, BS 1404 may correspond to any of the UEs or scheduled entities shown in any of the figures. Figure 1 , Figure 2 , Figure 5-9 , Figure 12-13 , Fig.15 , Fig.17 and Fig. 22 Any of the base stations or scheduling entities shown in any of the figures.

[0228] UE 1402 includes a first panel 1406 and a second panel 1408. Similarly, BS 1404 includes at least a first panel 1410 and a second panel 1412.

[0229] Initially, the UE 1402 transmits to the BS 1404 via a first transmit beam 1414 transmitted by the first panel 1406. Additionally, the UE 1402 receives from the BS 1404 via a first receive beam 1416 received by the second panel 1408. Thus, the first transmit beam 1414 and the first receive beam 1416 constitute a first beam pair.

[0230] After making the decision to switch to a different beam pair, UE 1402 can transmit to BS 1404 via a second transmit beam 1418 transmitted by first panel 1406. In addition, UE 1402 can receive from BS 1404 via a second receive beam 1420 received by second panel 1408. Second transmit beam 1418 and second receive beam 1420 constitute a second beam pair. In some examples, the second beam pair can provide better spatial separation (between transmit beam and receive beam) than the first beam pair. In some examples, the second beam pair can provide a smaller measured receive timing difference than the first beam pair. In some examples, the second beam pair can provide lower self-interference and / or higher SINR than the first beam pair.

[0231] In some examples, the base station may decide to switch to a different beam pair. For example, the decision may be made based on a measurement of the receive timing difference or an interference measurement made by the UE. In this case, the UE may report the measured receive timing difference to the base station. In addition, the base station may indicate to the UE that a different beam pair will be used.

[0232] In some examples, the UE may decide to switch to a different beam pair. For example, the decision may be made based on a measurement of a receive timing difference or an interference measurement made by the UE. In this case, the UE may send a request to the base station to use a different beam pair. In addition, the base station may indicate to the UE that the request to use a different beam pair has been accepted.

[0233] In some examples, a particular beam pair may be specified in a UE request or base station indication. For example, a UE or base station may indicate a particular beam pair to be used. In some examples, a UE or base station may identify a particular beam pair based on a receive timing difference (e.g., a beam pair known to have a lower measured receive timing difference may be selected).

[0234] In some examples, the change to the different beam pairs can be dynamically signaled and / or semi-statically signaled. For example, the base station can send a MAC-CE, DCI, or RRC message to the UE to notify the UE to use a different beam pair (e.g., in response to an autonomous decision made by the base station or in response to a request from the UE). As another example, the UE can send a request for a different beam pair (or a specific beam pair) to the base station via a MAC-CE, UCI, or RRC message.

[0235] Fig.15 1 is a signaling diagram 1500 illustrating an example of beam pair switching related signaling in a wireless communication system including a base station (BS) 1502 and a UE 1504. In some examples, the BS 1502 may correspond to Figure 1 , Figure 2 , Figure 5-9 , Figure 12-14 , Fig.17 and Fig. 22 In some examples, UE 1504 may correspond to any of the base stations or scheduling entities shown in any of the figures. Figure 1 , Figure 2 , Figure 5-9 , Figure 12-14 , Fig.17 and Fig.18 Any one of the UEs or scheduled entities shown in any of the figures.

[0236] exist Fig.15 At step 1506, UE 1504 may perform protocol layer 1 (L1) signal measurements during full-duplex operation. For example, UE 1504 may perform the above-mentioned Fig.12 The operation is similar to the operation discussed in step 1206.

[0237] At optional step 1508, UE 1504 may send a measurement report including the measurement information from step 1506 to BS 1502. For example, UE 1504 may perform the above-described Fig.12 The operation is similar to the operation discussed in step 1208.

[0238] At optional step 1510, in some examples, UE 1504 may select to use a different beam pair. For example, as discussed above, if the measurement information from step 1506 indicates that the measured receive timing difference is greater than the duration of a normal cyclic prefix (NCP) currently designated for communication with BS 1502, UE 1504 may select to switch from a first beam pair to a second beam pair. In some examples, UE 1504 may identify a second beam pair having a shorter measured receive timing difference and / or lower interference than the first beam pair.

[0239] At optional step 1512, in some examples, UE 1504 can therefore send a request to BS 1502 to use a different beam pair. For example, UE 1504 can send a MAC-CE, UCI, RRC message, or some other type of message that includes a request to use a different beam pair. In some examples, the request can specify a specific beam pair that UE 1504 has identified as acceptable or preferred.

[0240] In some examples, the decision to send a request by UE 1504 (or the selection to perform step 1510) can be based on a threshold. For example, if the measured receive timing difference exceeds a threshold and / or the number of times the measured receive timing difference exceeds the threshold during a period of time is higher than another threshold, UE 1504 can choose to send a request or choose to switch to a different beam pair. In some examples, BS 1502 can configure UE 1504 with a threshold (e.g., by sending an indication to UE 1504 using any of the signaling discussed herein).

[0241] At step 1514, at some point in time (e.g., when BS 1502 schedules communication with UE 1504), in some examples, BS 1502 selects to use a different beam pair for communication with UE 1502. For example, if the measurement information received at step 1508 indicates that the measured receive timing difference is greater than the duration of the NCP for the currently scheduled communication, BS 1502 may select to designate a beam pair for UE 1504 that is different from the beam pair currently designated for communication with UE 1504. Here, BS 1502 may identify a second beam pair that has a shorter measured receive timing difference and / or lower interference than the first beam pair. As another example, if BS 1502 receives a request from UE 1504 to use a different beam pair at step 1512, BS 1502 may select to configure UE 1504 to switch from the first beam pair to the second beam pair. Here, BS 1502 may identify a second beam pair having a shorter measured receive timing difference and / or lower interference than the first beam pair, or BS 1502 may select to use the beam pair specified by the request.

[0242] At step 1516, BS 1502 sends an indication of a different beam pair to UE 1504. For example, base station 1502 may send a MAC-CE, DCI, RRC message, or some other type of message indicating that UE 1504 will use the second beam pair. At step 1518, UE 1504 communicates with BS 1502 using the second beam pair.

[0243] In some aspects, the disclosure relates to increasing frequency domain separation between beams in a beam pair in some cases. In some cases, increasing frequency domain separation between resources allocated for different beams in a beam pair can reduce interference (leakage).

[0244] Will refer to Fig.16A and Fig. 16B Several examples of variations of frequency domain separation are described. Fig.16A are diagrams showing two examples of overlapping spectrum for UL and DL. Fig. 16B is a diagram illustrating an example of non-overlapping spectrum for UL and DL (eg, sub-band FDD, also referred to as flexible duplexing).

[0245] exist Fig.16A In the example shown in , time is shown along the horizontal axis and frequency is shown along the vertical axis. A first example 1602 of overlapping spectrum is depicted on the left, while a second example 1604 is depicted on the right. In the first example 1602, the UL time-frequency resource 1606 completely overlaps a portion of the DL time-frequency resource 1608. In the second example 1604, the UL time-frequency resource 1610 partially overlaps a portion of the DL time-frequency resource 1612. Therefore, a device (e.g., a base station and / or a scheduled entity) using overlapping spectrum can transmit and receive on the same time and frequency resources. That is, the device can transmit and receive simultaneously at the same frequency (or multiple frequencies) at the same time (or multiple times). UL and DL share the same time and frequency resources. The overlap in the time-frequency resources can be complete (as in the first example 1602) or partial (as in the second example 1604).

[0246] In either case, an increase in frequency domain separation for UL and DL can be achieved by shifting the frequency resources used for UL and / or DL. In the first example 1602, UL time-frequency resources 1606 can be shifted up or down in frequency, DL time-frequency resources 1608 can be shifted up or down in frequency, or UL time-frequency resources 1606 and DL time-frequency resources 1608 can be shifted in opposite directions. Similarly, in the second example 1612, UL time-frequency resources 1610 can be shifted down in frequency, and / or DL ​​time-frequency resources 1612 can be shifted up in frequency.

[0247] exist Fig. 16BIn the example shown in , time is shown along the horizontal axis and frequency is shown along the vertical axis. Here, the device can transmit and receive simultaneously but on different frequency resources in a non-paired spectrum (e.g., within the same carrier bandwidth). The UL time-frequency resources 1616 are separated from the DL time-frequency resources 1618 by a guard band 1620.

[0248] exist Fig. 16B In the example of , an increase in frequency domain separation for UL and DL may be achieved by increasing the size of guard band 1620. For example, additional frequency tones may be allocated to the guard band, which may result in UL time-frequency resources 1616 being shifted down in frequency and / or DL ​​time-frequency resources 1618 being shifted up in frequency.

[0249] In some examples, if the UE cannot identify a beam pair for which the DL / UL receive timing difference is less than the current cyclic prefix duration, the UE can request more frequency domain separation to help mitigate the ISI effects (e.g., to mitigate ISI due to asynchronous timing between beams). In some examples, the request can simply request additional frequency domain separation (e.g., leaving the base station with the choice of the amount of separation to add). In some examples, the request can request a specific frequency domain separation or a specific increase in frequency domain separation (e.g., by specifying the exact number of RBs to be added to the current frequency domain separation).

[0250] In an example where the frequency resources for the frequency bands are overlapping (e.g., Fig.16A ), the request may request a reduction in overlap. For example, the request may request M fewer RB overlaps. The request may optionally include an indication of a specific location of the frequency resource.

[0251] In an example where the frequency resources for a frequency band are separated by a guard band (eg, Fig. 16B ), the request may request to increase the guard band. For example, the request may request to increase the guard band between the DL frequency and the UL frequency band by N RBs in size. The request may optionally include an indication of a specific location of the frequency resource.

[0252] If the receive timing difference changes, the base station and / or UE may choose to increase the frequency domain separation. Here, if the receive timing difference is greater than the duration of the currently used cyclic prefix, the increase of the frequency domain separation may be performed.

[0253] In some examples, the base station may decide to increase the frequency domain separation. For example, the decision may be made based on a measurement of the receive timing difference or an interference measurement made by the UE. In this case, the UE may report the measured receive timing difference to the base station. In addition, the base station may indicate to the UE that the frequency domain separation has been increased.

[0254] In some examples, the UE may decide to increase the frequency domain separation. For example, the decision may be made based on a measurement of the receive timing difference or an interference measurement made by the UE. In this case, the UE may send a request to the base station to increase the frequency domain separation. In addition, the base station may indicate to the UE that the request to increase the frequency domain separation has been accepted.

[0255] In some examples, the increase in frequency domain separation can be dynamically signaled and / or semi-statically signaled. For example, the base station can send a MAC-CE, DCI, or RRC message to the UE to notify the UE that the frequency domain separation has been increased (e.g., in response to an autonomous decision made by the base station or in response to a request from the UE). As another example, the UE can send a request for additional frequency domain separation to the base station via a MAC-CE, UCI, or RRC message.

[0256] Fig.17 1700 is a signaling diagram illustrating an example of frequency domain separation related signaling in a wireless communication system including a base station (BS) 1702 and a UE 1704. In some examples, the BS 1702 may correspond to Figure 1 , Figure 2 , Figure 5-9 , Figure 12-15 , Fig. 22 , Fig.26 and Fig.30 In some examples, UE 1704 may correspond to any of the base stations or scheduling entities shown in any of the figures. Figure 1 , Figure 2 , Figure 5-9 , Figure 12-15 , Fig.18 , Fig.26 and Fig.28 Any one of the UEs or scheduled entities shown in any of the figures.

[0257] exist Fig.17 At step 1706, UE 1704 may perform protocol layer 1 (L1) signal measurements during full-duplex operation. For example, UE 1704 may perform the above-mentioned Fig.12 The operation is similar to the operation discussed in step 1206.

[0258] At optional step 1708, UE 1704 may send a measurement report including the measurement information from step 1706 to BS 1702. For example, UE 1704 may perform the above-mentioned Fig.12 The operation is similar to the operation discussed in step 1208.

[0259] At optional step 1710, in some examples, UE 1704 may choose to increase frequency domain separation between UL transmissions and DL transmissions. For example, as discussed above, if the measurement information from step 1706 indicates that the measured receive timing difference is greater than the duration of the normal cyclic prefix (NCP) currently designated for communication with BS 1702, UE 1704 may choose to increase frequency domain separation. In some examples, UE 1704 may identify a specific amount of additional frequency domain separation (e.g., based on the measured size of leakage from UL to DL, or vice versa).

[0260] At optional step 1712, in some examples, UE 1704 may therefore send a request for additional frequency domain separation to BS 1702. For example, UE 1704 may send a MAC-CE, UCI, RRC message, or some other type of message that includes a request to increase frequency domain separation. In some examples, the request may specify an increased amount of frequency domain separation that UE 1704 has identified as acceptable or preferred.

[0261] In some examples, the decision to send a request by UE 1704 (or the selection to perform step 1710) can be based on a threshold. For example, if the measured receive timing difference exceeds a threshold and / or the number of times the measured receive timing difference exceeds the threshold during a period of time is higher than another threshold, UE 1704 can choose to send a request or choose to increase frequency domain separation. In some examples, BS 1702 can configure UE 1704 with a threshold (e.g., by sending an indication to UE 1704 using any of the signaling discussed herein).

[0262] At step 1714, at a certain point in time (e.g., when BS 1702 schedules communication with UE 1704), in some examples, BS 1702 selects to increase frequency domain separation for communication with UE 1704. For example, if the measurement information received at step 1708 indicates that the measured receive timing difference is greater than the duration of the NCP for the currently scheduled communication, BS 1702 may select to use more frequency domain separation than the frequency domain separation currently designated for communication with UE 1704. Here, BS 1702 may identify the specific increase in frequency domain separation (e.g., based on cross-beam leakage information obtained from the measurement report). As another example, if BS 1702 receives a request for additional frequency domain separation from UE 1704 at step 1712, BS 1702 may select to allocate additional frequency domain separation for communication with UE 1704. Here, BS 1702 may identify the specific increase in frequency domain separation (eg, based on cross-beam leakage information obtained from the measurement report), or BS 1702 may choose to use the specific increase in frequency domain separation specified by the request.

[0263] At step 1716, BS 1702 sends an indication of the increase in frequency domain separation to UE 1704. For example, base station 1702 may send a MAC-CE, DCI, RRC message, or some other type of message indicating the increased frequency domain separation. At step 1718, UE 1704 communicates with BS 1702 using the newly allocated frequency resources.

[0264] Fig.18 18 is a block diagram illustrating an example of a hardware implementation for a UE 1800 employing a processing system 1814. For example, the UE 1800 may be a device configured to communicate wirelessly with a base station, such as in Figure 1-17 In some implementations, UE 1304 may correspond to Figure 1 , Figure 2 , Figure 5-9 , Figure 12-15 , Fig.17 , Fig.26 or Fig.28 Any one of the UEs or scheduled entities shown in any of the figures.

[0265] According to various aspects of the present disclosure, any combination of elements or any part of elements or elements can be implemented using a processing system 1814. The processing system 1814 may include one or more processors 1804. Examples of processors 1804 include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout the present disclosure. In various examples, UE 1800 may be configured to perform any one or more of the functions described herein. That is, the processor 1804 as utilized in UE 1800 may be used to implement any one or more of the processes and procedures described herein.

[0266] In some cases, the processor 1804 may be implemented via a baseband or modem chip, while in other implementations, the processor 1804 itself may include several devices that are distinct and different from the baseband or modem chip (e.g., in scenarios that can work together to implement the embodiments discussed herein). And as mentioned above, various hardware arrangements and components outside of the baseband modem processor may be used in various implementations (including RF chains, power amplifiers, modulators, buffers, interleavers, adders / summers, etc.).

[0267] In this example, the processing system 1814 can be implemented using a bus architecture, which is generally represented by bus 1802. Depending on the specific application and overall design constraints of the processing system 1814, the bus 1802 may include any number of interconnecting buses and bridges. The bus 1802 communicatively couples various circuits including one or more processors (which are generally represented by processor 1804), memory 1805, and computer readable media (which are generally represented by computer readable media 1806). The bus 1802 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described any further. The bus interface 1808 provides an interface between the bus 1802 and the transceiver 1810 and between the bus 1802 and the interface 1830. The transceiver 1810 provides a communication interface or unit for communicating with various other devices over a wireless transmission medium. In some examples, the UE may include two or more transceivers 1810, each transceiver being configured to communicate with a corresponding network type (e.g., terrestrial or non-terrestrial). The interface 1830 provides a communication interface or unit for communicating with various other devices and equipment (e.g., other devices contained in the same device as the UE or other external device) on an internal bus or an external transmission medium (such as an Ethernet cable). Depending on the nature of the device, the interface 1830 may include a user interface (e.g., a keypad, a display, a speaker, a microphone, a joystick). Of course, such a user interface is optional and may be omitted in some examples (such as IoT devices).

[0268] The processor 1804 is responsible for managing the bus 1802 and general processing, including executing software stored on the computer-readable medium 1806. The software, when executed by the processor 1804, causes the processing system 1814 to perform the various functions described below for any particular device. The computer-readable medium 1806 and the memory 1805 may also be used to store data that is manipulated by the processor 1804 when executing the software.

[0269] One or more processors 1804 in the processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted to mean instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc. The software may reside on a computer-readable medium 1806.

[0270] Computer readable medium 1806 may be a non-transitory computer readable medium. For example, non-transitory computer readable media include magnetic storage devices (e.g., hard disks, floppy disks, tapes), optical disks (e.g., compact disks (CDs) or digital versatile disks (DVDs)), smart cards, flash memory devices (e.g., card, stick or key drives), random access memory (RAM), read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), registers, removable disks, and any other suitable medium for storing software and / or instructions that can be accessed and read by a computer. Computer readable medium 1806 may be located in processing system 1814, outside processing system 1814, or distributed among multiple entities including processing system 1814. Computer readable medium 1806 may be embodied in a computer program product. For example, a computer program product may include a computer readable medium having packaging materials. Those skilled in the art will recognize how to best implement the described functionality given throughout the present disclosure based on the specific application and the overall design constraints imposed on the entire system.

[0271] UE 1800 may be configured to perform any one or more of the operations described herein (e.g., as described above in conjunction with Figure 1-17 Described and combined as follows Figure 19-21 In some aspects of the present disclosure, the processor 1804 as utilized in the UE 1800 may include circuits configured for various functions.

[0272] The processor 1804 may include a communication and processing circuit 1841. The communication and processing circuit 1841 may be configured to communicate with a base station such as a gNB. The communication and processing circuit 1841 may include one or more hardware components that provide a physical structure for performing various processes related to wireless communication (e.g., signal reception and / or signal transmission) as described herein. The communication and processing circuit 1841 may also include one or more hardware components that provide a physical structure for performing various processes related to signal processing (e.g., processing received signals and / or processing signals for transmission) as described herein. In some examples, the communication and processing circuit 1841 may include two or more transmit / receive chains, each transmit / receive chain configured to process signals of different RAT (or RAN) types. The communication and processing circuit 1841 may also be configured to execute communication and processing software 1851 included on the computer-readable medium 1806 to implement one or more functions described herein.

[0273] In some examples, the communication and processing circuit 1841 can be configured to receive and process downlink beamforming signals at mmWave frequencies or sub-6 GHz frequencies via the transceiver 1810 and the antenna array 1820. For example, the communication and processing circuit 1841 can be configured to receive a corresponding reference signal (e.g., SSB or CSI-RS) from the base station on each of the multiple downlink beams via at least one of the first antenna panels of the antenna array 1820 during downlink beam scanning. The communication and processing circuit 1841 can also be configured to send a beam measurement report to the base station.

[0274] In some examples, communication and processing circuitry 1841 may also be configured to generate an uplink beamforming signal at a mmWave frequency or a sub-6 GHz frequency and transmit the uplink beamforming signal via transceiver 1810 and antenna array 1820. For example, communication and processing circuitry 1841 may be configured to transmit a corresponding reference signal (e.g., SRS or DMRS) to a base station on each of a plurality of uplink beams via at least one second antenna panel of antenna array 1820 during uplink beam scanning.

[0275] The communication and processing circuit 1841 may also be configured to generate a request and send the request to the base station. For example, the request may be included in the following: a MAC-CE carried in a PUSCH, a UCI in a PUCCH or a PUSCH, a random access message, or an RRC message. The communication and processing circuit 1841 may also be configured to generate a scheduling request and send a scheduling request to the base station (e.g., via the UCI in the PUCCH) to receive an uplink grant for a PUSCH carrying a MAC-CE including a request for uplink beam refinement.

[0276] The communication and processing circuit 1841 may also be configured to generate an uplink signal and transmit the uplink signal on one or more uplink transmit beams applied to the uplink signal. The uplink signal may include, for example, a PUCCH, a PUSCH, an SRS, a DMRS, or a physical random access channel (PRACH).

[0277] The communication and processing circuit 1841 may also be configured to control the antenna array 1820 and the transceiver 1810 to search for and identify multiple downlink transmit beams during downlink beam scanning. The communication and processing circuit 1841 may also be configured to obtain multiple beam measurements for each of the multiple downlink receive beams via the antenna array 1820 for each of the identified downlink transmit beams. The communication and processing circuit 1841 may also be configured to generate a beam measurement report to be sent to the base station using the communication and processing circuit 1841.

[0278] The communication and processing circuit 1841 may also be configured to identify one or more selected uplink beams based on beam measurements obtained from the downlink beam reference signal. In some examples, the communication and processing circuit 1841 may be configured to compare the corresponding RSRP (or other beam measurement) measured on each downlink receive beam in the downlink receive beam for each of the serving downlink transmit beams to identify the serving downlink receive beam, and further use the serving downlink receive beam as the selected uplink transmit beam. Each serving downlink receive beam may have the highest measured RSRP (or other beam measurement) for one of the downlink transmit beams.

[0279] The communication and processing circuit 1841 may be configured to generate one or more uplink transmit beams for transmission in an uplink beam scan. Each uplink transmit beam may carry an uplink reference signal (e.g., SRS) for measurement by the base station. The communication and processing circuit 1841 may also be configured to identify a selected uplink transmit beam selected by the base station based on the uplink beam measurement. For example, the communication and processing circuit 1841 may be configured to receive an indication of the selected uplink transmit beam from the base station.

[0280] In some implementations where the communication involves receiving information, the communication and processing circuitry 1841 may obtain information from a component of the UE 1800 (e.g., from a transceiver 1810 that receives information via radio frequency signaling or some other type of signaling suitable for an applicable communication medium), process (e.g., decode) the information, and output the processed information. For example, the communication and processing circuitry 1841 may output the information to another component of the processor 1804, the memory 1805, or the bus interface 1808. In some examples, the communication and processing circuitry 1841 may receive one or more of a signal, a message, other information, or any combination thereof. In some examples, the communication and processing circuitry 1841 may receive the information via one or more channels. In some examples, the communication and processing circuitry 1841 may include the functionality of a unit for receiving. In some examples, the communication and processing circuitry 1841 may include the functionality of a unit for decoding (e.g., as in Fig.12 and Fig.13 In Fig.19 1906 of FIG. 1904 ).

[0281] In some implementations where communication involves sending (e.g., transmitting) information, the communication and processing circuitry 1841 may obtain the information (e.g., from another component of the processor 1804, the memory 1805, or the bus interface 1808), process (e.g., encode) the information, and output the processed information. For example, the communication and processing circuitry 1841 may output the information to the transceiver 1810 (e.g., which sends the information via radio frequency signaling or some other type of signaling suitable for the applicable communication medium). In some examples, the communication and processing circuitry 1841 may send one or more of a signal, a message, other information, or any combination thereof. In some examples, the communication and processing circuitry 1841 may send the information via one or more channels. In some examples, the communication and processing circuitry 1841 may include the functionality of a unit for sending (e.g., a unit for transmitting). In some examples, the communication and processing circuitry 1841 may include the functionality of a unit for encoding (e.g., as in Fig.12 and Fig.13 In Fig.19 1906 of FIG. 1904 ).

[0282] Processor 1804 may include timing management circuitry 1842 configured to perform timing management related operations as discussed herein (e.g., in conjunction with Figure 11-21 The timing management circuit 1842 may include functionality of a unit for determining the SCS (e.g., as in Fig.12 At step 1210, at Fig.13 At step 1310 and / or at Fig.19Timing management circuit 1842 may include functionality of a unit for generating a request (e.g., as described in block 1902 of FIG. 18). Fig.12 At step 1210, at Fig.13 At step 1310, Fig.15 At step 1510, Fig.17 At step 1710 and / or at Fig.21 Timing management circuit 1842 may include functionality of a unit for sending a request (e.g., as described in block 2102 of FIG. 10 ). Fig.12 At step 1210, at Fig.13 At step 1310, at Fig.15 At step 1510, Fig.17 At step 1710 and / or at Fig.21 Timing management circuit 1842 may include functionality of a unit for receiving a response (e.g., as described in block 2104 of FIG. 10A ). Fig.12 At step 1218, Fig.13 At step 1316, at Fig.15 At step 1516, at Fig.17 At step 1716 and / or at Fig.21 The timing management circuit 1842 may also be configured to execute timing management software 1852 included on the computer-readable medium 1806 to implement one or more functions described herein.

[0283] Processor 1804 may include cyclic prefix processing circuitry 1843 configured to perform cyclic prefix processing related operations as discussed herein (e.g., in conjunction with Figure 11-21 The cyclic prefix processing circuit 1843 may include functionality for identifying a unit for extending a cyclic prefix (e.g., as in Fig.12 At step 1210 and / or at Fig.19 The cyclic prefix processing circuit 1843 may include the functionality of a unit for receiving an indication (e.g., as described in block 1904 of FIG. 18). Fig.12 At step 1218 and / or at Fig. 20 The cyclic prefix processing circuit 1843 may include functionality for determining a unit indicating a specified extended cyclic prefix (e.g., as described in block 2002 of FIG. 1 ). Fig.12 At step 1218 and / or at Fig. 20 The cyclic prefix processing circuit 1843 may include the functionality of a unit for communicating using an extended cyclic prefix (e.g., as described in block 2004 of FIG. 1 ). Fig.12 At step 1220 and / or at Fig. 20The cyclic prefix processing circuit 1843 may also be configured to execute cyclic prefix processing software 1853 included on the computer readable medium 1806 to implement one or more functions described herein.

[0284] Fig.19 1900 is a flow chart illustrating an example process 1900 for a wireless communication system according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required for implementation of all embodiments. In some examples, process 1900 may be performed by Fig.18 In some examples, process 1900 may be performed by any suitable device or unit for performing the functions or algorithms described below.

[0285] At block 1902, the UE may determine that a first subcarrier spacing (SCS) for a first transmission is greater than 60 kHz (e.g., 120 kHz, 240 kHz, 480 kHz, 960 kHz, etc.). Fig.18 The timing management circuit 1842 shown and described, together with the communication and processing circuit 1841 and the transceiver 1810, can monitor downlink signals carrying information indicating the SCS to be used on a given frequency band. In some examples, the timing management circuit 1842, together with the communication and processing circuit 1841 and the transceiver 1810, can monitor the downlink control channel for DCI and parse the DCI to determine the SCS specified for the uplink transmission and / or downlink transmission scheduled by the DCI.

[0286] In some examples, the first transmission is for full-duplex communication between the user equipment and the base station.

[0287] At block 1904, the UE may identify an extended cyclic prefix (ECP) associated with the first SCS. Fig.18 The cyclic prefix processing circuit 1843 shown and described, together with the communication and processing circuit 1841 and the transceiver 1810, can determine that a particular NCP or ECP can be used with a particular SCS based on the configuration and / or information received from the serving gNB.

[0288] In some examples, determining that the first SCS for the first transmission is 120kHz or 240kHz (determination thereof) may include receiving a first indication of the first SCS (reception thereof) from the base station. In some examples, identifying the ECP may include receiving a second indication of the ECP from the base station.

[0289] At block 1906, the UE may encode or decode the first transmission, wherein the encoding or decoding of the first transmission is based on the ECP. Fig.18 The cyclic prefix processing circuit 1843, in conjunction with the communication and processing circuit 1841 and the transceiver 1810, shown and described, may generate an uplink transmission including symbols preceded by an ECP. As another example, the cyclic prefix processing circuit 1843, in conjunction with the communication and processing circuit 1841 and the transceiver 1810, may process a received downlink transmission and process the symbols included therein based on the symbols being preceded by an ECP.

[0290] In some examples, the method may also include: measuring a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and determining that the timing difference is greater than a length of a normal cyclic prefix (CP) for the first SCS. In some examples, identifying the ECP associated with the first SCS may include selecting the ECP after determining that the timing difference is greater than a length of a normal CP for the first SCS.

[0291] In some examples, the method may further include: determining that the first transmission is for full-duplex communication. In some examples, identifying the ECP associated with the first SCS may further include: selecting the ECP after determining that the first transmission is for full-duplex communication.

[0292] In some examples, the method may also include: measuring a timing difference between a first timing for a downlink transmission received at a user equipment and a second timing for an uplink transmission received at the user equipment; determining that the timing difference is greater than a length of a normal cyclic prefix (CP) for a first SCS; and after determining that the timing difference is greater than a length of a normal CP for the first SCS, sending a request to a base station. In some examples, the request may include at least one of: a request for a smaller SCS, a request to use an extended CP instead of a normal CP, a request to switch to a different beam pair, a request for additional frequency domain separation, or a combination thereof.

[0293] In some examples, the method may also include: measuring a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and sending an indication of the timing difference to the base station.

[0294] Fig. 202000 is a flow chart illustrating an example process 2000 for a wireless communication system according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required for implementation of all embodiments. In some examples, process 2000 may be performed by Fig.18 In some examples, process 2000 may be performed by any suitable device or unit for performing the functions or algorithms described below.

[0295] At block 2002, the UE may receive a first indication from a base station. Fig.18 The cyclic prefix processing circuit 1843 shown and described, together with the communication and processing circuit 1841 and the transceiver 1810, can monitor downlink signals from the gNB (e.g., on a designated channel) and parse the signals to determine whether the signals include a configuration message.

[0296] In some examples, the first indication further specifies a length of the first configurable ECP. In some examples, the first indication further specifies that the first SCS is 120kHz, 240kHz, 480kHz, or 960kHz. In some examples, receiving the first indication from the base station may include receiving the first indication via a medium access control-control element (MAC-CE), downlink control information (DCI), or a radio resource control (RRC) message.

[0297] At block 2004, the UE may determine that the first indication specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS). Fig.18 The cyclic prefix processing circuit 1843 shown and described may parse a received configuration message to determine whether the message specifies a CP (eg, NCP or ECP) ​​to be used with a particular SCS.

[0298] At block 2006, the UE may communicate with the base station using a first configurable ECP designated for the first SCS. Fig.18 The cyclic prefix processing circuit 1843 shown and described in conjunction with the communication and processing circuit 1841 and the transceiver 1810 can generate an uplink transmission that includes symbols preceded by a first configurable ECP. As another example, the cyclic prefix processing circuit 1843 in conjunction with the communication and processing circuit 1841 and the transceiver 1810 can process a received downlink transmission and process the symbols based on the symbols included therein being preceded by the first configurable ECP.

[0299] In some examples, the method may further include: sending a request for a first configurable ECP to the base station before receiving the first indication from the base station. In some examples, the request may include a request to use the first configurable ECP instead of a normal cyclic prefix for the first SCS. In some examples, the request specifies the length of the first configurable ECP. In some examples, the request specifies that the first SCS is 120kHz or 240kHz. In some examples, sending a request for the first configurable ECP to the base station may include sending the request via a medium access control-control element (MAC-CE), an uplink control information (UCI), or a radio resource control (RRC) message.

[0300] In some examples, the method may further include: measuring a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and determining that the timing difference is greater than a length of a normal cyclic prefix (CP) for the first SCS. In some examples, sending a request for a first configurable ECP may include sending the request after determining that the timing difference is greater than a length of a normal CP for the first SCS.

[0301] In some examples, the method may further include determining that the transmission is for full-duplex communication. In some examples, sending the request for the first configurable ECP may further include sending the request after determining that the transmission is for full-duplex communication.

[0302] In some examples, the method may also include: measuring a timing difference between a first timing for a downlink transmission received at a user equipment and a second timing for an uplink transmission received at the user equipment; determining that the timing difference is greater than a length of a normal cyclic prefix (CP) for the first SCS; and after determining that the timing difference is greater than a length of a normal CP for the first SCS, sending a request to the base station. In some examples, the request may include at least one of: a request for a smaller SCS, a request for switching to a different beam pair, a request for additional frequency domain separation, or a combination thereof.

[0303] In some examples, the method may also include: measuring a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and sending an indication of the timing difference to the base station.

[0304] Fig.212100 is a flow chart illustrating an example process 2100 for a wireless communication system according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some of the illustrated features may not be required for implementation of all embodiments. In some examples, process 2100 may be performed by Fig.18 In some examples, process 2100 may be performed by any suitable device or unit for performing the functions or algorithms described below.

[0305] At block 2102, the UE may generate at least one request, which may include at least one of: a request for a smaller subcarrier spacing (SCS) for full-duplex communication, a request for switching from a first beam pair to a second beam pair for full-duplex communication, a request for additional frequency domain separation for full-duplex communication, or a combination thereof. Fig.18 The timing management circuit 1842 shown and described may determine that a smaller SCS is needed (e.g., based on a measured timing difference or interference measurement), and in response, generate a message to be sent to the gNB requesting a smaller SCS. As another example, the above with respect to Fig.18 The timing management circuit 1842 shown and described may determine that a beam pair switch is required (e.g., based on a measured timing difference or interference measurement), and in response, generate a message to be sent to the gNB requesting a beam pair switch. As yet another example, the above with respect to Fig.18 The timing management circuit 1842 shown and described may determine that more frequency domain separation is required (e.g., based on measured timing differences or interference measurements) and, in response, generate a message to be sent to the gNB requesting additional frequency domain separation.

[0306] At block 2104, the UE may send at least one request to the base station. Fig.18 The timing management circuit 1842, along with the communication and processing circuit 1841 and transceiver 1810, shown and described may encode a request for transmission and send the request via a scheduled uplink channel.

[0307] In some examples, sending at least one request may include sending at least one request via at least one of: a medium access control-control element (MAC-CE), uplink control information (UCI), a radio resource control (RRC) message, or a combination thereof.

[0308] At block 2106, the UE may receive at least one response to the at least one request from the base station, wherein the at least one response may include at least one of: an indication of a smaller SCS, an indication of a switch from the first beam pair to the second beam pair, an indication of additional frequency domain separation, or any combination thereof. Fig.18 The timing management circuit 1842 shown and described, together with the communication and processing circuit 1841 and the transceiver 1810, can monitor the downlink channel from the gNB for signal energy, attempt to decode any received signal energy, and parse any message that is successfully decoded to determine whether the message includes configuration information for the UE.

[0309] In some examples, receiving at least one response may include receiving at least one response via at least one of: a medium access control-control element (MAC-CE), downlink control information (DCI), a radio resource control (RRC) message, or a combination thereof.

[0310] In some examples, the method may also include identifying a specific SCS based on a timing difference measured between a first timing for downlink transmissions received at the user equipment and a second timing for uplink transmissions received at the user equipment. In some examples, the request for a smaller SCS may include an indication of a specific SCS.

[0311] In some examples, the method may also include: identifying a specific beam pair based on a timing difference measured between a first timing for downlink transmissions received at the user equipment and a second timing for uplink transmissions received at the user equipment. In some examples, the request for switching from the first beam pair to the second beam pair specifies the specific beam pair as the second beam pair.

[0312] In some examples, the method may also include identifying a specific increase in frequency domain separation based on a timing difference measured between a first timing for downlink transmissions received at the user equipment and a second timing for uplink transmissions received at the user equipment. In some examples, the request for additional frequency domain separation specifies the specific increase in frequency domain separation. In some examples, the specific increase in frequency domain separation specifies at least one resource block.

[0313] In some examples, the request for additional frequency domain separation is used to request: a smaller overlap between the transmit band and the receive band, or a larger guard band between the transmit band and the receive band. In some examples, the request for additional frequency domain separation specifies at least one of the following: a frequency domain location for additional frequency domain separation, a specific overlap between the transmit band and the receive band, a specific guard band between the transmit band and the receive band, or a combination thereof.

[0314] In some examples, the method may further include: measuring a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and determining that the timing difference is greater than the length of a normal CP. In some examples, sending at least one request may include: sending at least one request after determining that the timing difference is greater than the length of a normal CP.

[0315] In some examples, the method may also include: measuring a timing difference between a first timing for a downlink transmission received at a user equipment and a second timing for an uplink transmission received at the user equipment; determining that the timing difference is greater than the length of a normal CP; and sending a request to the base station after determining that the timing difference is greater than the length of the normal CP. In some examples, the request may include a request to use an extended CP instead of a normal CP.

[0316] In some examples, the method may also include: measuring a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and sending an indication of the timing difference to the base station.

[0317] Fig. 22 2214 is a conceptual diagram illustrating an example of a hardware implementation for a base station (BS) 2200 employing a processing system 2214. In some implementations, the BS 2200 may correspond to a Figure 1 , Figure 2 , Figure 5-9 , Figure 12-15 , Fig.17 , Fig.26 and Fig.30 Any of the BSs (e.g., gNBs) or scheduling entities shown in any of the figures.

[0318] According to various aspects of the present disclosure, an element or any portion of an element or any combination of elements may be implemented using a processing system 2214. The processing system may include one or more processors 2204. The processing system 2214 may be associated with a processor 2204. Fig.18 The processing system 1814 shown in FIG. 1 is substantially the same, including a bus interface 2208, a bus 2202, a memory 2205 (which may contain information 2215 about communication parameters), a processor 2204, and a computer-readable medium 2206. In addition, the BS 2200 may include an interface 2230 (e.g., a network interface) that provides a means for communicating with at least one other device within the core network and with at least one radio access network.

[0319] BS 2200 may be configured to perform any one or more of the operations described herein (e.g., as described above in conjunction with Figure 1-17 Described and combined as follows Figure 23-25 In some aspects of the present disclosure, the processor 2204, as utilized in the BS 2200, may include circuits configured for various functions.

[0320] Processor 2204 may be configured to generate, schedule, and modify resource assignments or grants (e.g., a set of one or more resource elements) of time-frequency resources. For example, processor 2204 may schedule time-frequency resources within a plurality of time division duplex (TDD) and / or frequency division duplex (FDD) subframes, time slots, and / or mini-slots to carry user data traffic and / or control information to and / or from a plurality of UEs.

[0321] Processor 2204 may be configured to schedule resources for transmission of downlink reference signals (e.g., SSB or CSI-RS) on multiple downlink beams for downlink beam scanning according to the selected downlink beam scanning type and the selected number of downlink reference signal resources indicated in the request for uplink beam refinement received from the UE. Processor 2204 may also be configured to schedule resources for uplink transmission of uplink reference signals (e.g., SRS) on multiple uplink beams for uplink beam scanning according to the selected beam scanning type and the selected number of uplink reference signal resources indicated in the request. Processor 2204 may also be configured to schedule resources that may be used by the UE to send the request. For example, uplink beam refinement request resources may include resources scheduled for transmission of PUCCH, PUSCH, PRACH opportunities, or RRC messages. In some examples, processor 2204 may be configured to schedule PUSCH resources for an uplink beam refinement request in response to receiving a scheduling request from a UE.

[0322] Processor 2204 may also be configured to schedule resources for transmission of uplink signals. In some examples, based on an indication of an uplink signal associated with one or more uplink transmit beams included in the request, resources may be associated with one or more uplink transmit beams and one or more corresponding receive beams applied to the uplink signal (e.g., based on an uplink BPL). In some examples, resources may be associated with an uplink transmission scheme indicating the number of uplink transmit beams to be used for the uplink signal, the number of repetitions of each uplink transmit beam of the uplink signal, and a multiplexing scheme when more than one uplink transmit beam is used to send the uplink signal.

[0323] In some aspects of the present disclosure, the processor 2204 may include a communication and processing circuit 2241. The communication and processing circuit 2241 may be configured to communicate with the UE. The communication and processing circuit 2241 may include one or more hardware components that provide a physical structure for performing various processes related to communication (e.g., signal reception and / or signal transmission) as described herein. The communication and processing circuit 2241 may also include one or more hardware components that provide a physical structure for performing various processes related to signal processing (e.g., processing received signals and / or processing signals for transmission) as described herein. The communication and processing circuit 2241 may also be configured to execute the communication and processing software 2251 included on the computer-readable medium 2206 to implement one or more functions described herein.

[0324] In some examples, communication and processing circuitry 2241 may be configured to receive and process uplink beamforming signals at mmWave frequencies or sub-6 GHz frequencies via transceiver 2210 and antenna array 2220. For example, communication and processing circuitry 2241 may be configured to receive a respective reference signal (e.g., SRS or DMRS) from a UE on each of a plurality of uplink beams during uplink beam scanning.

[0325] In some examples, the communication and processing circuit 2241 may also be configured to generate a downlink beamforming signal at a mmWave frequency or a sub-6 GHz frequency and transmit the downlink beamforming signal via the transceiver 2210 and the antenna array 2220. For example, the communication and processing circuit 2241 may be configured to transmit a corresponding downlink reference signal (e.g., SSB or CSI-RS) to the UE on each of the multiple downlink beams via at least one first antenna panel of the antenna array 2220 during downlink beam scanning. The communication and processing circuit 2241 may also be configured to receive a beam measurement report from the UE.

[0326] The communication and processing circuit 2241 may also be configured to receive a request from the UE. For example, the request may be included in: a MAC-CE carried in a PUSCH, a UCI in a PUCCH or a PUSCH, a random access message, or an RRC message. The communication and processing circuit 2241 may also be configured to receive from the UE a scheduling request for an uplink grant for a PUSCH carrying a MAC-CE (e.g., via the UCI in the PUCCH), the MAC-CE including a request for uplink beam refinement.

[0327] The communication and processing circuit 2241 may also be configured to receive uplink signals on one or more uplink receive beams via one or more uplink transmit beams applied to the uplink signals. For example, the communication and processing circuit 2241 may be configured to receive uplink signals on one or more uplink receive beams via at least one second antenna panel of the antenna array 2220. The uplink signals may include, for example, PUCCH, PUSCH, SRS, DMRS, or PRACH.

[0328] The communication and processing circuit 2241 may also be configured to control the antenna array 2220 and the transceiver 2210 to generate multiple downlink transmit beams during downlink beam scanning. The communication and processing circuit 2241 may also be configured to use the communication and processing circuit 2244 to receive beam measurement reports from the UE. The communication and processing circuit 2241 may also be configured to identify one or more selected uplink beams based on the beam measurement. In some examples, the communication and processing circuit 2241 may be configured to compare the corresponding RSRP (or other beam measurement) measured on each downlink receive beam in the downlink receive beam for each serving downlink transmit beam to identify the serving downlink receive beam, and further identify the serving downlink receive beam as the selected uplink transmit beam. Each serving downlink receive beam may have the highest measured RSRP (or other beam measurement) for one of the downlink transmit beams.

[0329] The communication and processing circuit 2241 may be configured to receive one or more uplink transmit beams in an uplink beam scan. Each uplink transmit beam may carry an uplink reference signal (e.g., SRS) for measurement by the communication and processing circuit 2241. The communication and processing circuit 2241 may also be configured to obtain multiple beam measurements of each of the multiple uplink receive beams of the antenna array 2220 for each of the uplink transmit beams. The communication and processing circuit 2241 may also be configured to select the selected uplink transmit beam and the corresponding uplink receive beam that forms the corresponding uplink BPL based on the uplink beam measurements.

[0330] In some implementations where the communication involves receiving information, the communication and processing circuitry 2241 may obtain information from a component of the BS 2200 (e.g., from a transceiver 2210 that receives information via radio frequency signaling or some other type of signaling suitable for an applicable communication medium), process (e.g., decode) the information, and output the processed information. For example, the communication and processing circuitry 2241 may output the information to another component of the processor 2204, the memory 2205, or the bus interface 2208. In some examples, the communication and processing circuitry 2241 may receive one or more of a signal, a message, other information, or any combination thereof. In some examples, the communication and processing circuitry 2241 may receive the information via one or more channels. In some examples, the communication and processing circuitry 2241 may include the functionality of a unit for receiving. In some examples, the communication and processing circuitry 2241 may include the functionality of a unit for decoding (e.g., as in Fig.12 and Fig.13 In Fig.23 2306 of ).

[0331] In some implementations where communication involves sending (e.g., transmitting) information, the communication and processing circuitry 2241 may obtain the information (e.g., from another component of the processor 2204, the memory 2205, or the bus interface 2208), process (e.g., encode) the information, and output the processed information. For example, the communication and processing circuitry 2241 may output the information to the transceiver 2210 (e.g., which sends the information via radio frequency signaling or some other type of signaling suitable for the applicable communication medium). In some examples, the communication and processing circuitry 2241 may send one or more of a signal, a message, other information, or any combination thereof. In some examples, the communication and processing circuitry 2241 may send the information via one or more channels. In some examples, the communication and processing circuitry 2241 may include the functionality of a unit for sending (e.g., a unit for transmitting). In some examples, the communication and processing circuitry 2241 may include the functionality of a unit for encoding (e.g., as in Fig.12 and Fig.13 Neutral Fig.23 2306 of ).

[0332] Processor 2204 may include timing management circuitry 2242 configured to perform timing management related operations as discussed herein (e.g., in conjunction with Figure 1-25 The timing management circuit 2242 may include functionality for specifying a unit for SCS (e.g., as in Fig.12 At step 1214 and / or at Fig.23The timing management circuit 2242 may include functionality for selecting a unit for SCS for full-duplex communication (e.g., as described in block 2302 of FIG. 1 ). Fig.12 At step 1214, at Fig.13 At step 1314 and / or at Fig.25 The timing management circuit 2242 may include functionality of a unit for selecting a switch from a first beam pair to a second beam pair for full-duplex communication (e.g., as described in block 2502 of FIG. 1 ). Fig.15 At step 1514 and / or at Fig.25 The timing management circuit 2242 may include functionality for selecting an additional frequency domain separation unit for full-duplex communication (e.g., as described in block 2502 of FIG. 25). Fig.17 At step 1714 and / or at Fig.25 The timing management circuit 2242 may include functionality for sending an indication of the selection (e.g., as described in block 2502 of FIG. 1 ). Fig.13 At step 1316, at Fig.15 At step 1516, at Fig.17 At step 1716 and / or at Fig.25 The timing management circuit 2242 may also be configured to execute timing management software 2252 included on the computer readable medium 2206 to implement one or more functions described herein.

[0333] Processor 2204 may include cyclic prefix processing circuitry 2243 configured to perform cyclic prefix processing related operations as discussed herein (e.g., in conjunction with Figure 1-25 The cyclic prefix processing circuit 2243 may include functionality for identifying a unit for extending a cyclic prefix (e.g., as in Fig.12 At step 1216 and / or at Fig.23 The cyclic prefix processing circuit 2243 may include functionality of a unit for generating an indication of a specified extended cyclic prefix (e.g., as described in block 2304 of FIG. 1 ). Fig.12 At step 1216 and / or at Fig.24 The cyclic prefix processing circuit 2243 may include functionality of a unit for sending an indication of a specified extended cyclic prefix (e.g., as described in block 2402 of FIG. 1 ). Fig.12 At step 1218 and / or at Fig.24 The cyclic prefix processing circuit 2243 may include the functionality of a unit for communicating using an extended cyclic prefix (e.g., as described in block 2404 of FIG. 1 ). Fig.12 At step 1220 and / or at Fig.24 The cyclic prefix processing circuit 2243 may also be configured to execute cyclic prefix processing software 2253 included on the computer readable medium 2206 to implement one or more functions described herein.

[0334] Fig.23 2300 for wireless communication according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some illustrated features may not be required for implementation of all embodiments. In some examples, process 2300 may be performed by Fig. 22 In some examples, process 2300 may be performed by any suitable device or unit for performing the functions or algorithms described below.

[0335] At block 2302, the BS may specify that the first subcarrier spacing (SCS) for the first transmission is 120 kHz or 240 kHz. Fig. 22 The timing management circuit 2242 shown and described may determine that a particular SCS should be used for communication with the UE based on service requirements (e.g., data rate, latency requirements, etc.) and / or other factors. As another example, the timing management circuit 2242 may receive a request from the UE to use a smaller SCS or a specific SCS.

[0336] In some examples, the first transmission is for full-duplex communication between the base station and the user equipment.

[0337] At block 2304, the BS may identify an extended cyclic prefix (ECP) associated with the first SCS. Fig. 22 The cyclic prefix processing circuit 2243 shown and described may determine that the ECP should be used for a particular SCS for communications with the UE based on measured receive timing differences, interference, and / or other factors. As another example, the cyclic prefix processing circuit 2243 may receive a request from the UE to use the ECP.

[0338] At block 2306, the BS may encode or decode the first transmission, wherein encoding or decoding the first transmission is based on ECP. Fig. 22The cyclic prefix processing circuit 2243 shown and described in conjunction with the communication and processing circuit 2241 and the transceiver 2210 can generate a downlink transmission that includes symbols preceded by an ECP. As another example, the cyclic prefix processing circuit 2243 in conjunction with the communication and processing circuit 2241 and the transceiver 2210 can process a received uplink transmission and process the symbols included therein based on the symbols being preceded by an ECP.

[0339] In some examples, the method may also include: receiving an indication of a timing difference measured between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and determining that the timing difference is greater than a length of a normal cyclic prefix (CP) for the first SCS. In some examples, identifying the ECP associated with the first SCS may include selecting the ECP after determining that the timing difference is greater than a length of a normal CP for the first SCS.

[0340] In some examples, the method may further include determining that the first transmission is for full-duplex communication. In some examples, identifying the ECP associated with the first SCS may include selecting the ECP after determining that the first transmission is for full-duplex communication.

[0341] In some examples, the method may also include: sending a first indication of a first SCS to the user equipment; and sending a second indication of an ECP to the user equipment.

[0342] In some examples, the method may further include receiving a request from a user device. In some examples, the request may include at least one of the following: a request for a smaller SCS for full-duplex communication, a request for using an extended cyclic prefix (CP) instead of a normal CP for full-duplex communication, a request for switching to a different beam pair for full-duplex communication, a request for additional frequency domain separation for full-duplex communication, or a combination thereof.

[0343] In some examples, the method may also include: receiving an indication of a timing difference measured between a first timing for a downlink transmission received at a user device and a second timing for an uplink transmission received at the user device; determining that the timing difference is greater than a length of a normal cyclic prefix (CP) used for the first SCS; and after determining that the timing difference is greater than the length of the normal CP used for the first SCS, performing at least one of the following: selecting a smaller SCS for full-duplex communication with the user device, selecting an extended CP instead of a normal CP for full-duplex communication with the user device, switching to a different beam pair for full-duplex communication with the user device, increasing frequency domain separation for full-duplex communication with the user device, or a combination thereof.

[0344] Fig.24 2400 for wireless communication according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some illustrated features may not be required for implementation of all embodiments. In some examples, process 2400 may be performed by Fig. 22 In some examples, process 2400 may be performed by any suitable device or unit for performing the functions or algorithms described below.

[0345] At block 2402, the BS may generate a first indication that specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS). Fig. 22 The cyclic prefix processing circuit 2243 shown and described can determine that a specific ECP (e.g., of a specific length) should be used for the SCS for communication with the UE based on the measured receive timing difference, interference, and / or other factors. As another example, the cyclic prefix processing circuit 2243 can receive a request from the UE to use a specific ECP.

[0346] In some examples, the first indication further specifies a length of the first configurable ECP. In some examples, the first indication further specifies that the first SCS is 120 kHz or 240 kHz.

[0347] At block 2404, the BS may send a first indication to the user equipment. Fig. 22 The cyclic prefix processing circuit 2243, along with the communication and processing circuit 2241 and transceiver 2210 shown and described, may encode the indication in a message for transmission and send the message via a designated downlink channel.

[0348] In some examples, sending the first indication to the user equipment may include sending the first indication via a medium access control-control element (MAC-CE), downlink control information (DCI), or a radio resource control (RRC) message.

[0349] At block 2406, the BS may communicate with the user equipment using a first configurable ECP designated for the first SCS. Fig. 22The cyclic prefix processing circuit 2243 shown and described in conjunction with the communication and processing circuit 2241 and the transceiver 2210 can generate a downlink transmission that includes symbols preceded by a first configurable ECP. As another example, the cyclic prefix processing circuit 2243 in conjunction with the communication and processing circuit 2241 and the transceiver 2210 can process a received uplink transmission and process the symbols based on the symbols included therein being preceded by the first configurable ECP.

[0350] In some examples, the method may further include receiving a request for a first configurable ECP from the user equipment before sending the first indication to the user equipment. In some examples, the request may include a request to use the first configurable ECP instead of a normal cyclic prefix for the first SCS. In some examples, the request specifies the length of the first configurable ECP. In some examples, the request specifies that the first SCS is 120kHz or 240kHz. In some examples, receiving a request for a first configurable ECP from the user equipment may include receiving the request via a medium access control-control element (MAC-CE), an uplink control information (UCI), or a radio resource control (RRC) message.

[0351] In some examples, the method may also include: receiving an indication of a timing difference measured between a first timing for a downlink transmission received at a user device and a second timing for an uplink transmission received at the user device; determining that the timing difference is greater than a length of a normal cyclic prefix (CP) used for the first SCS; and after determining that the timing difference is greater than a length of the normal CP used for the first SCS, selecting a first configurable ECP for the first SCS.

[0352] In some examples, the method may further include: designating a first SCS for full-duplex communication; and after designating the first SCS for full-duplex communication, selecting a first configurable ECP for the first SCS.

[0353] In some examples, the method may further include receiving a request from a user device. In some examples, the request may include at least one of: a request for a smaller SCS for full-duplex communication, a request for switching to a different beam pair for full-duplex communication, a request for additional frequency domain separation for full-duplex communication, or a combination thereof.

[0354] In some examples, the method may also include: receiving an indication of a timing difference measured between a first timing for a downlink transmission received at a user device and a second timing for an uplink transmission received at the user device; determining that the timing difference is greater than a length of a normal cyclic prefix (CP) used for the first SCS; and after determining that the timing difference is greater than the length of the normal CP used for the first SCS, performing at least one of the following: selecting a smaller SCS for full-duplex communication with the user device, switching to a different beam pair for full-duplex communication with the user device, increasing frequency domain separation for full-duplex communication with the user device, or a combination thereof.

[0355] Fig.25 2500 for wireless communication according to some aspects of the present disclosure. As described below, some or all of the illustrated features may be omitted in certain implementations within the scope of the present disclosure, and some illustrated features may not be required for implementation of all embodiments. In some examples, process 2500 may be performed by Fig. 22 In some examples, process 2500 may be performed by any suitable device or unit for performing the functions or algorithms described below.

[0356] At box 2502, the BS may select at least one of the following for full-duplex communication with the user equipment: a smaller subcarrier spacing (SCS), a switch from a first beam pair to a second beam pair, additional frequency domain separation, or any combination thereof. For example, the timing management circuit 2242 may determine that a smaller SCS is required (e.g., based on a measured timing difference or interference measurement), and in response, generate a message to be sent to the UE indicating the smaller SCS. In some examples, the timing management circuit 2242, together with the communication and processing circuit 2241 and the transceiver 2210, may receive a request for a smaller SCS from the UE. As another example, the timing management circuit 2242 may determine that a beam pair switch is required (e.g., based on a measured timing difference or interference measurement), and in response, generate a message to be sent to the UE indicating the beam pair switch.

[0357] In some examples, the timing management circuit 2242, together with the communication and processing circuit 2241 and the transceiver 2210, can receive a request for beam switching from the UE. As another example, the timing management circuit 2242 can determine that more frequency domain separation is required (e.g., based on the measured timing difference or interference measurement), and in response, generate a message to be sent to the UE indicating additional frequency domain separation. In some examples, the timing management circuit 2242, together with the communication and processing circuit 2241 and the transceiver 2210, can receive a request for additional frequency domain separation from the UE.

[0358] At block 2504, the BS may send at least one indication of the selection to the user equipment. Fig. 22 The timing management circuit 2242, along with the communication and processing circuit 2241 and transceiver 2210 shown and described, may encode the indication in a message for transmission and transmit the message via a designated downlink channel.

[0359] In some examples, sending at least one indication may include sending at least one indication via a medium access control-control element (MAC-CE), downlink control information (DCI), or a radio resource control (RRC) message.

[0360] In some examples, the method may further include receiving at least one request from the user equipment. In some examples, the at least one request may include at least one of the following: a request for a smaller SCS, a request for switching from a first beam pair to a second beam pair, a request for additional frequency domain separation, or a combination thereof. In some examples, receiving at least one request from the user equipment may include receiving at least one request via a medium access control-control element (MAC-CE), uplink control information (UCI), or a radio resource control (RRC) message.

[0361] In some examples, the method may further include receiving a request from a user device to use a specific SCS. In some examples, the selection may include selecting to use (selection of) a specific SCS after receiving the request. In some examples, at least one indication specifies that a specific SCS is to be used for full-duplex communication.

[0362] In some examples, the method may also include receiving a request from a user device to use a specific beam pair. In some examples, the selection may include selecting to use the specific beam pair after receiving the request. In some examples, at least one indication specifies that the specific beam pair is to be used for full-duplex communication.

[0363] In some examples, the method may further include receiving a request from a user device to use a specific increase in frequency domain separation. In some examples, the selection may include selecting to use the specific increase in frequency domain separation after receiving the request. In some examples, at least one indication specifies that the specific increase in frequency domain separation is to be used for full-duplex communication. In some examples, the specific increase in frequency domain separation specifies at least one resource block.

[0364] In some examples, the method may further include receiving a request from a user device. In some examples, the request may include a request for a smaller overlap between the transmit band and the receive band or a request for a larger guard band between the transmit band and the receive band. In some examples, the selection may include selecting to use the smaller overlap or the larger guard band after receiving the request. In some examples, at least one indication specifies that the smaller overlap or the larger guard band will be used for full-duplex communication.

[0365] In some examples, the method may further include receiving a request from a user device, wherein the request specifies at least one of the following: a frequency domain location for additional frequency domain separation, a specific overlap between a transmit band and a receive band, a specific guard band between a transmit band and a receive band, or a combination thereof. In some examples, the selection may include selecting to use at least one of the frequency domain location, the specific overlap, the specific guard band, or a combination thereof after receiving the request. In some examples, at least one indication specifies that at least one of the frequency domain location, the specific overlap, the specific guard band, or a combination thereof will be used for full-duplex communication.

[0366] In some examples, the method may also include: receiving an indication of a timing difference measured between a first timing for a downlink transmission received at a user device and a second timing for an uplink transmission received at the user device; determining that the timing difference is greater than the length of a normal CP; and triggering selection based on determining that the timing difference is greater than the length of the normal CP.

[0367] In some examples, the method may further include receiving a request from a user device. In some examples, the request may include a request to use an extended CP instead of a normal CP; after receiving the request, selecting to use the extended CP instead of the normal CP; and after selecting to use the extended CP, sending an indication to the user device, wherein the indication specifies that the extended CP will be used instead of the normal CP.

[0368] In some examples, the method may also include: receiving an indication of a timing difference measured between a first timing for a downlink transmission received at a user device and a second timing for an uplink transmission received at the user device; determining that the timing difference is greater than the length of a normal CP; and selecting to use an extended CP instead of a normal CP after determining that the timing difference is greater than the length of the normal CP.

[0369] Fig.26 2600 is a signaling diagram illustrating an example of full-duplex communication operation in a wireless communication system including one or more base stations (BSs) 2602 and a UE 2604. In some examples, the BS 2602 in the one or more BSs may correspond to the UE 2604 in the wireless communication system. Figure 1 , Figure 2 , Figure 5-9 , Figure 13-15 , Fig.17 , Fig. 22 and Fig.30 In some examples, UE 2604 may correspond to any of the base stations or scheduling entities shown in any of the figures. Figure 1 , Figure 2 , Figure 5-9 , Figure 13-15 , Fig.17 , Fig.18 and Fig.28 Any of the UEs or scheduled entities shown in any of the figures. Fig.26 The example operations shown in are not limited to those shown and described below, but may include other operations (such as Fig.12 , Fig.13 , Fig.15 and Fig.17 ), one or more of which may be included in Fig.26 communication operation.

[0370] exist Fig.26 At a first step 2606 of the present invention, UE 2604 may perform measurements during full-duplex communication with BS 2602 to determine one or more of: an amount of interference at UE 2604, or a timing offset between transmissions as observed by UE 2604. As discussed above, interference at UE 2604 may be an indication that the timing offset between uplink transmissions and downlink transmissions corresponding to the same scheduled time resource is too large, as observed by UE 2604. In some examples, UE 2604 may measure interference (e.g., SINR) and / or strength (e.g., RSRP, RSRQ) of interfering uplink transmissions at one or more panels (e.g., panel 1) that UE 2604 uses to receive downlink transmissions from BS 2602. For example, as discussed herein, UE 2604 may measure a CSI-RS sent by BS 2602 during downlink transmissions and an SRS sent by UE 2604 during uplink transmissions (e.g., sent using panel 2).

[0371] UE 2604 may determine a timing offset between an uplink transmission and a downlink transmission corresponding to the same scheduled time resource. In some examples, the determination of the timing offset may be in response to an amount by which interference exceeds a threshold value. To determine the timing offset, UE 2604 may determine a time difference between (i) the start of reception at UE 2604 of an uplink transmission sent by UE 2604 (e.g., at panel 1) and (ii) the start of reception at UE of a downlink transmission from at least one of the one or more BSs, wherein the uplink transmission and the downlink transmission correspond to the same scheduled time resource. For example, UE 2604 may determine a difference between a time at which UE 2604 receives an SRS for an uplink transmission and a time at which UE 2604 receives a CSI-RS for a downlink transmission or a difference between a time at which a CP of a downlink transmission symbol is received and a time at which a CP of an uplink transmission symbol is received. It should be noted that in some cases, reflections and / or leakage of an uplink transmission may cause UE 2604 to receive the uplink transmission at a time different from the time at which the uplink transmission was actually sent.

[0372] At a second step 2608, the UE 2604 may determine one or more communication parameters for full-duplex communication between the UE 2604 and at least one of the one or more BSs based on one or more of the measurements of the first step 2606. The communication parameters may include the SCS, the duration of the CP, the downlink and uplink beam pairs for full-duplex communication, and the frequency domain separation between uplink transmission and downlink transmission.

[0373] UE 2604 may determine one or more communication parameters based on which of the one or more communication parameters may resolve the time difference measured at first step 2606 being greater than a threshold amount of time. For example, the threshold amount of time may be a duration of a CP length corresponding to an SCS used by the UE and the BS for uplink and downlink transmissions. Thus, if the start of reception of an uplink transmission sent by UE 2604 at UE 2604 and the start of reception of a downlink transmission from at least one of the one or more BSs at UE 2604 are separated by an amount of time less than or equal to the threshold, UE 2604 may determine to change one or more of the communication parameters to reduce the measured time difference to less than the threshold. UE 2604 may determine to change one or more of the ... the above description and in Fig.12 , Fig.13 , Fig.15 and Fig.17 One or more of the steps shown in the steps to determine one or more communication parameters.

[0374] For example, UE 2604 may determine to reduce the current SCS to achieve a longer duration CP. For example, UE 2604 may determine to reduce the SCS from 120kHz (0.57us CP duration) to 60kHz (1.17us CP duration) or lower.

[0375] In another example, UE 2604 may determine to change the duration of the CP. In one example, the CP duration may be modified by changing the SCS, as discussed above. In another example, UE 2604 may determine to maintain the current SCS and switch from a normal CP to an extended CP (ECP) associated with the current SCS. For example, if the current SCS is 120kHz, the corresponding ECP may be a longer duration (>0.57us) compared to a normal CP (0.57us). That is, UE 2604 may determine to maintain the current SCS, but use an ECP corresponding to the current SCS. As discussed above, the duration of the ECP may be configured (pre-configured) at UE 2604, and its duration may depend on the SCS being used.

[0376] In another example, if the UE 2604 determines that the amount of time is less than or equal to a threshold, the UE 2604 may determine to change the downlink and uplink beam pairs currently used for full-duplex communication.

[0377] In another example, if the UE 2604 determines that the amount of time is less than or equal to the threshold, the UE 2604 may determine to increase the frequency domain separation between the uplink transmission and the downlink transmission for full-duplex communication. In this example, the UE 2604 may include an amount of separation (e.g., in kHz) between future uplink transmissions and downlink transmissions.

[0378] At the first communication 2610, the UE 2604 may send a request to the BS 2602 to modify one or more communication parameters determined at the second step 2608 for communication between the UE 2604 and one or more BSs including the BS 2602. For example, the UE 2604 may send a MAC-CE, a UCI, an RRC message, or any other suitable type of message.

[0379] At a third step 2612, BS 2602 may receive a request for modification and, in response to the request, determine to continue the requested modification of one or more communication parameters, reject the modification, or use a different modification. In some examples, in response to the request, BS 2602 may send one or more modified parameters to another BS of the one or more BSs, the one or more modified parameters indicating parameters for FD communication between the UE and the other BS. Here, BS 2602 may be a master BS and the other BS may be a secondary BS. In some examples, BS 2602 may imply acceptance by continuing to use the one or more modified parameters to communicate with UE 2604.

[0380] If BS 2602 determines to continue the requested modification, BS 2602 may notify UE 2604 in a second communication 2614 to continue communicating according to the requested modification. Alternatively, if BS 2602 determines to continue the requested modification, BS 2602 may continue to communicate with UE 2604 according to the requested modification without notification. If BS 2602 determines to reject the requested modification and / or use different modified one or more communication parameters, BS 2602 may notify UE 2604 of the rejection and / or different modified one or more communication parameters in a second communication 2614. For example, the second communication may be a MAC-CE, DCI, RRC message, or any other appropriate type of message. In some examples, the indication may be for a configurable ECP. For example, the indication may specify a specific ECP and / or the duration of the ECP.

[0381] At the third communication 2616, the BS 2602 and the UE 2604 may communicate using the modified communication parameters. To this end, at step 2618, the BS 2602 may encode downlink transmissions using the ECP (e.g., send OFDM symbols with the ECP) ​​and / or decode uplink transmissions using the ECP (e.g., receive OFDM symbols with the ECP). Similarly, at step 2620, the UE 2604 may encode uplink transmissions using the ECP (e.g., send OFDM symbols with the ECP) ​​and / or decode downlink transmissions using the ECP (e.g., receive OFDM symbols with the ECP).

[0382] Fig. 27 2700 for full-duplex wireless communication in accordance with certain aspects of the present disclosure. Operations 2700 may be performed, for example, by a UE (e.g., Figure 1 , Figure 2 , Figure 5-9 , Figure 13-15 , Fig.17 , Fig.26 and Fig.28 2700) is performed by any UE or any of the scheduled entities shown in any of the figures. Operation 2700 may be implemented as a software component executed and run on one or more processors. In addition, the sending and receiving of signals by the UE in operation 2700 may be implemented, for example, through one or more antennas. In certain aspects, the sending and / or receiving of signals by the UE may be implemented via a bus interface of one or more processors that obtains and / or outputs signals.

[0383] At the first box 2702, operation 2700 can be initiated by the following operation: based on one or more parameters for FD communication between the UE and one or more BSs including the BS, a request is sent to the BS to modify the one or more parameters, resulting in a time difference greater than a threshold, wherein the time difference is between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource.

[0384] Optionally, at a second block 2704, operation 2700 may include receiving, from the BS, one or more modified parameters based on the request.

[0385] At a third block 2706, operations 2700 may include communicating with one or more BSs using the one or more modified parameters based on the request.

[0386] In certain aspects, the threshold comprises a cyclic prefix (CP) length as defined by one or more parameters.

[0387] In certain aspects, reception at a UE of an uplink transmission sent by the UE includes reception of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein reception at the UE of a downlink transmission from at least one of the one or more BSs includes reception of the downlink transmission from at least one of the one or more BSs at one or more antenna panels of the UE.

[0388] In certain aspects, the one or more parameters include one or more of: a subcarrier spacing (SCS), a duration of a cyclic prefix (CP), downlink and uplink beam pairs for FD communications, or a frequency domain separation between uplink and downlink transmissions for FD communications.

[0389] In certain aspects, the request to modify one or more parameters includes a request to decrease a subcarrier spacing (SCS) for FD communications.

[0390] In certain aspects, the request to modify one or more parameters comprises a request to increase a duration of a cyclic prefix (CP).

[0391] In certain aspects, a subcarrier spacing (SCS) defined in one or more parameters is greater than 60 kHz.

[0392] In certain aspects, the request to increase the duration of the CP includes a request to use an extended CP (ECP).

[0393] In certain aspects, the request to modify one or more parameters includes a request to change downlink and uplink beam pairs used for FD communications.

[0394] In certain aspects, the request to modify one or more parameters includes a request to increase frequency domain separation between uplink transmissions and downlink transmissions for FD communications.

[0395] In certain aspects, the request includes increasing an amount of frequency domain separation as a guard band.

[0396] In certain aspects, the request to modify one or more parameters is sent via one or more of a Medium Access Control-Control Element (MAC-CE), an Uplink Control Information (UCI), or a Radio Resource Control (RRC) message.

[0397] Fig.28 2800 is a block diagram illustrating an example of a hardware implementation for a UE 2800 employing a processing system 2814. For example, the UE 2800 may be a device configured to communicate wirelessly with a base station, such as in Figure 1-26 In some implementations, UE 2800 may correspond to Figure 1 , Figure 2 , Figure 5-9 , Figure 12-15 , Fig.17 and Fig.26 Any one of the UEs or scheduled entities shown in any of the figures.

[0398] According to various aspects of the present disclosure, any combination of elements or any part of elements or elements can be implemented using a processing system 2814. The processing system 2814 may include one or more processors 2804. Examples of processors 2804 include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout the present disclosure. In various examples, the UE 2800 may be configured to perform any one or more of the functions described herein. That is, the processor 2804 as used in the UE 2800 may be used to implement any one or more of the processes and procedures described herein.

[0399] In some cases, the processor 2804 may be implemented via a baseband or modem chip, while in other implementations, the processor 2804 itself may include several devices that are distinct and different from the baseband or modem chip (e.g., in scenarios that can work together to implement the embodiments discussed herein). And as mentioned above, various hardware arrangements and components outside of the baseband modem processor may be used in various implementations (including RF chains, power amplifiers, modulators, buffers, interleavers, adders / summers, etc.).

[0400] In this example, the processing system 2814 can be implemented using a bus architecture, which is generally represented by bus 2802. Depending on the specific application and overall design constraints of the processing system 2814, the bus 2802 may include any number of interconnecting buses and bridges. The bus 2802 communicatively couples various circuits including one or more processors (which are generally represented by processor 2804), memory 2805, and computer-readable media (which are generally represented by computer-readable media 2806). The bus 2802 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described any further. The bus interface 2808 provides an interface between the bus 2802 and the transceiver 2810 and between the bus 2802 and the interface 2830. The transceiver 2810 provides a communication interface or unit for communicating with various other devices over a wireless transmission medium. In some examples, the UE may include two or more transceivers 2810, each transceiver being configured to communicate with a corresponding network type (e.g., terrestrial or non-terrestrial). The interface 2830 provides a communication interface or unit for communicating with various other devices and equipment (e.g., other devices contained in the same device as the UE or other external device) on an internal bus or an external transmission medium (such as an Ethernet cable). Depending on the nature of the device, the interface 2830 may include a user interface (e.g., a keypad, a display, a speaker, a microphone, a joystick). Of course, such a user interface is optional and may be omitted in some examples (such as IoT devices).

[0401] The processor 2804 is responsible for managing the bus 2802 and general processing, including executing software stored on the computer-readable medium 2806. The software, when executed by the processor 2804, causes the processing system 2814 to perform the various functions described below for any particular device. The computer-readable medium 2806 and the memory 2805 may also be used to store data manipulated by the processor 2804 when executing the software.

[0402] One or more processors 2804 in the processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted to mean instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc. The software may reside on a computer-readable medium 2806.

[0403] Computer readable medium 2806 may be a non-transitory computer readable medium. For example, non-transitory computer readable media include magnetic storage devices (e.g., hard disks, floppy disks, tapes), optical disks (e.g., compact disks (CDs) or digital versatile disks (DVDs)), smart cards, flash memory devices (e.g., cards, sticks, or key drives), random access memory (RAM), read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), registers, removable disks, and any other suitable medium for storing software and / or instructions that can be accessed and read by a computer. Computer readable medium 2806 may be located in processing system 2814, outside processing system 2814, or distributed among multiple entities including processing system 2814. Computer readable medium 2806 may be embodied in a computer program product. For example, a computer program product may include a computer readable medium having packaging materials. Those skilled in the art will recognize how to best implement the described functionality given throughout the present disclosure according to the specific application and the overall design constraints imposed on the entire system.

[0404] In some aspects, the computer readable medium 2806 is configured to store instructions (e.g., computer executable code) that, when executed by the one or more processors 2804, cause the one or more processors 2804 to perform the Fig.19 , Fig. 20 , Fig.21 and Fig. 27 The operations shown in or other operations for performing the various techniques discussed herein.

[0405] In the depicted example, the computer-readable medium 2806 stores code 2851 for sending a request to modify the one or more parameters for FD communication between a UE and one or more BSs including a base station (BS) based on the one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. The computer-readable medium 2806 also stores code 2852 for communicating with the one or more BSs using the one or more modified parameters based on the request. The computer-readable medium 2806 also stores code 2853 for receiving the one or more modified parameters based on the request from the BS.

[0406] In the depicted example, one or more processors 2804 include circuits configured to implement code stored in a computer-readable medium / memory 2806, including: circuits 2841 for sending a request to modify the one or more parameters for FD communication between a UE and one or more BSs including a base station (BS) based on the one or more parameters causing a time difference greater than a threshold to the BS, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. The one or more processors 2804 also include circuits 2842 for communicating with the one or more BSs using the one or more modified parameters based on the request. The one or more processors 2804 also include circuits 2843 for receiving the one or more modified parameters based on the request from the BS.

[0407] The various components of the communication device 2800 may be provided for performing the functions described herein (including Fig.19 , Fig. 20 , Fig.21 and Fig. 27 ) method unit.

[0408] In some examples, the means for communicating (eg, transmitting and / or receiving) may include the transceiver 2810 and / or the antenna array 2820 of the UE 2800. In some examples, the means for determining may include various processing system components, such as: one or more processors 2804.

[0409] It is worth noting that Fig.28 are examples, and many other examples and configurations of communications device 2800 are possible.

[0410] Fig.29 2900 for full-duplex wireless communication in accordance with certain aspects of the present disclosure. Operations 2900 may be performed, for example, by a BS (e.g., Figure 1 , Figure 2 , Figure 5-9 , Figure 13-15 , Fig.17 , Fig. 22 and Fig.262900) is performed by any BS or scheduling entity shown in any of the figures. Operation 2900 may be implemented as a software component executed and run on one or more processors. In addition, the sending and receiving of signals by the UE in operation 2900 may be implemented, for example, through one or more antennas. In certain aspects, the sending and / or receiving of signals by the UE may be implemented via a bus interface of one or more processors that obtains and / or outputs signals.

[0411] At the first box 2902, operation 2900 can be initiated by the following operation: receiving a request from the UE to modify the one or more parameters based on one or more parameters for FD communication between the UE and one or more BSs including the BS, resulting in a time difference greater than a threshold, wherein the time difference is between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource.

[0412] At the second box 2904, operation 2900 may include performing one or more of the following: sending one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the other BS; or using one or more modified parameters to communicate with the UE.

[0413] Optionally, at third block 2906, operation 2900 may include receiving, from the UE, one or more modified parameters based on the request.

[0414] In certain aspects, the threshold comprises a cyclic prefix (CP) length as defined by one or more parameters.

[0415] In certain aspects, reception at a UE of an uplink transmission sent by the UE includes reception of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein reception at the UE of a downlink transmission from at least one of the one or more BSs includes reception of the downlink transmission from at least one of the one or more BSs at one or more antenna panels of the UE.

[0416] In certain aspects, the one or more parameters include one or more of: a subcarrier spacing (SCS), a duration of a cyclic prefix (CP), downlink and uplink beam pairs for FD communications, or a frequency domain separation between uplink and downlink transmissions for FD communications.

[0417] In certain aspects, the request to modify one or more parameters includes a request to decrease a subcarrier spacing (SCS) for FD communications.

[0418] In certain aspects, the request to modify one or more parameters comprises a request to increase a duration of a cyclic prefix (CP).

[0419] In certain aspects, a subcarrier spacing (SCS) defined in one or more parameters is greater than 60 kHz.

[0420] In certain aspects, the request to increase the duration of the CP includes a request to use an extended CP (ECP).

[0421] In certain aspects, the request to modify one or more parameters includes a request to change downlink and uplink beam pairs used for FD communications.

[0422] In certain aspects, the request to modify one or more parameters includes a request to increase frequency domain separation between uplink transmissions and downlink transmissions for FD communications.

[0423] In certain aspects, the request includes increasing an amount of frequency domain separation as a guard band.

[0424] In certain aspects, the request to modify one or more parameters is received via one or more of a Medium Access Control-Control Element (MAC-CE), an Uplink Control Information (UCI), or a Radio Resource Control (RRC) message.

[0425] Fig.30 3014 is a block diagram showing an example of a hardware implementation for a BS 3000 employing a processing system 3014. For example, the BS 3000 may be a device configured to communicate wirelessly with a UE, such as in Figure 1-26 In some implementations, BS 3000 may correspond to Figure 1 , Figure 2 , Figure 5-9 , Figure 12-15 , Fig.17 and Fig.26 Any one of the UEs or scheduled entities shown in any of the figures.

[0426] According to various aspects of the present disclosure, any combination of elements or any part of elements or elements can be implemented using processing system 3014. Processing system 3014 may include one or more processors 3004. Examples of processor 3004 include microprocessors, microcontrollers, digital signal processors (DSPs), field programmable gate arrays (FPGAs), programmable logic devices (PLDs), state machines, gated logic, discrete hardware circuits, and other suitable hardware configured to perform various functionalities described throughout the present disclosure. In various examples, BS 3000 can be configured to perform any one or more of the functions described herein. That is, processor 3004 as utilized in BS 3000 can be used to implement any one or more of the processes and procedures described herein.

[0427] In some cases, the processor 3004 may be implemented via a baseband or modem chip, while in other implementations, the processor 3004 itself may include several devices that are distinct and different from the baseband or modem chip (e.g., in scenarios that can work together to implement the embodiments discussed herein). And as mentioned above, various hardware arrangements and components outside of the baseband modem processor may be used in various implementations (including RF chains, power amplifiers, modulators, buffers, interleavers, adders / summers, etc.).

[0428] In this example, the processing system 3014 can be implemented using a bus architecture, which is generally represented by bus 3002. Depending on the specific application and overall design constraints of the processing system 3014, the bus 3002 may include any number of interconnecting buses and bridges. The bus 3002 communicatively couples various circuits including one or more processors (which are generally represented by processor 3004), memory 3005, and computer readable media (which are generally represented by computer readable media 3006). The bus 3002 may also link various other circuits such as timing sources, peripherals, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described any further. The bus interface 3008 provides an interface between the bus 3002 and the transceiver 3010 and between the bus 3002 and the interface 3030. The transceiver 3010 provides a communication interface or unit for communicating with various other devices over a wireless transmission medium. In some examples, the BS may include two or more transceivers 3010, each of which is configured to communicate with a corresponding network type (e.g., terrestrial or non-terrestrial). The interface 3030 provides a communication interface or unit for communicating with various other devices and equipment (e.g., other devices contained in the same device as the BS or other external devices) on an internal bus or an external transmission medium (such as an Ethernet cable). Depending on the nature of the device, the interface 3030 may include a user interface (e.g., a keypad, a display, a speaker, a microphone, a joystick). Of course, such a user interface is optional and may be omitted in some examples (such as IoT devices).

[0429] The processor 3004 is responsible for managing the bus 3002 and general processing, including executing software stored on the computer-readable medium 3006. The software, when executed by the processor 3004, causes the processing system 3014 to perform the various functions described below for any particular device. The computer-readable medium 3006 and the memory 3005 may also be used to store data manipulated by the processor 3004 when executing the software.

[0430] One or more processors 3004 in the processing system can execute software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted to mean instructions, instruction sets, codes, code segments, program codes, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures, functions, etc. The software may reside on a computer-readable medium 3006.

[0431] Computer readable medium 3006 may be a non-transitory computer readable medium. For example, non-transitory computer readable media include magnetic storage devices (e.g., hard disks, floppy disks, tapes), optical disks (e.g., compact disks (CDs) or digital versatile disks (DVDs)), smart cards, flash memory devices (e.g., cards, sticks, or key drives), random access memory (RAM), read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), registers, removable disks, and any other suitable medium for storing software and / or instructions that can be accessed and read by a computer. Computer readable medium 3006 may be located in processing system 3014, outside processing system 3014, or distributed among multiple entities including processing system 3014. Computer readable medium 3006 may be embodied in a computer program product. For example, a computer program product may include a computer readable medium having packaging materials. Those skilled in the art will recognize how to best implement the described functionality given throughout the present disclosure according to the specific application and the overall design constraints imposed on the entire system.

[0432] In some aspects, the computer readable medium 3006 is configured to store instructions (e.g., computer executable code) that, when executed by the one or more processors 3004, cause the one or more processors 3004 to perform the Fig.23 , Fig.24 , Fig.25 and Fig.29 The operations shown in or other operations for performing the various techniques discussed herein.

[0433] In the depicted example, the computer-readable medium 3006 stores code 3051 for receiving from a user equipment (UE) a request to modify the one or more parameters for FD communication between the UE and one or more BSs including the BS, based on the one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. The computer-readable medium 3006 also stores code 3052 for at least one of the following: sending one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the other BS; or communicating with the UE using the one or more modified parameters. The computer-readable medium 3006 optionally stores code 3053 for sending an indication of the one or more modified parameters to the UE based on the request.

[0434] In the depicted example, one or more processors 3004 include circuits configured to implement code stored in a computer-readable medium / memory 3006, including: circuits 3041 for receiving from a user equipment (UE) a request to modify the one or more parameters for FD communication between the UE and one or more BSs including the BS, based on the one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception of an uplink transmission sent by the UE at the UE and (ii) the start of reception of a downlink transmission from at least one of the one or more BSs at the UE, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource. The one or more processors 3004 also include circuits 3042 for one or more of the following: sending one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the other BS; or communicating with the UE using the one or more modified parameters. Optionally, the one or more processors 3004 may include a circuit 3043 for sending an indication of one or more modified parameters to the UE based on the request.

[0435] The various components of the communication device 3000 may provide for performing the functions described herein (including Fig.23 , Fig.24 , Fig.25 and Fig.29 ) method unit.

[0436] In some examples, means for communicating (eg, transmitting and / or receiving) may include transceiver 3010 and / or antenna array 3020 of BS 3000. In some examples, means for determining may include various processing system components, such as one or more processors 3004.

[0437] It is worth noting that Fig.30 are examples, and many other examples and configurations of communications device 3000 are possible.

[0438] Sample Clauses

[0439] Examples of implementation are described in the following numbered clauses:

[0440] Item 1: A user equipment (UE) configured for full-duplex (FD) wireless communication, the UE comprising: a memory; and a processor coupled to the memory, the memory and the processor being configured to: send a request to modify one or more parameters for FD communication between the UE and one or more BSs including a base station (BS) to the BS based on one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception at the UE of an uplink transmission sent by the UE and (ii) the start of reception at the UE of a downlink transmission from at least one of the one or more BSs, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource; and communicate with the one or more BSs using the one or more modified parameters based on the request.

[0441] Clause 2: A UE as described in clause 1, wherein the threshold comprises a cyclic prefix (CP) length as defined by the one or more parameters.

[0442] Clause 3: A UE according to any one of clauses 1 and 2, wherein reception at the UE of the uplink transmission sent by the UE includes reception of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein reception at the UE of the downlink transmission from at least one of the one or more BSs includes reception of the downlink transmission from at least one of the one or more BSs at the one or more antenna panels of the UE.

[0443] Clause 4: A UE according to any of clauses 1-3, wherein the one or more parameters include one or more of the following: a subcarrier spacing (SCS), a duration of a cyclic prefix (CP), a downlink and uplink beam pair for FD communication, or a frequency domain separation between the uplink transmission and the downlink transmission for FD communication.

[0444] Clause 5: A UE as described in any of clauses 1-4, wherein the request to modify the one or more parameters includes a request to reduce a subcarrier spacing (SCS) for FD communication.

[0445] Clause 6: A UE as described in any of clauses 1-5, wherein the request to modify the one or more parameters comprises a request to increase the duration of a cyclic prefix (CP).

[0446] Clause 7: A UE as described in clause 6, wherein the subcarrier spacing (SCS) defined in the one or more parameters is greater than 60kHz.

[0447] Clause 8: A UE as set forth in any of clauses 1-7, wherein the request to increase the duration of the CP comprises a request to use an extended CP (ECP).

[0448] Clause 9: A UE as set forth in any of clauses 1-8, wherein the request to modify the one or more parameters comprises a request to change downlink and uplink beam pairs used for FD communication.

[0449] Clause 10: A UE as set forth in any of clauses 1-9, wherein the request to modify the one or more parameters comprises a request to increase frequency domain separation between the uplink transmission and the downlink transmission for FD communications.

[0450] Clause 11: A UE as set out in any of clauses 1-10, wherein the request comprises an amount by which the frequency domain separation as a guard band is to be increased.

[0451] Clause 12: A UE according to any of clauses 1-11, wherein the request to modify the one or more parameters is sent via one or more of a medium access control-control element (MAC-CE), uplink control information (UCI) or a radio resource control (RRC) message.

[0452] Clause 13: The UE of any of clauses 1-12, the memory and the processor being configured to: receive, from the BS, the one or more modified parameters based on the request.

[0453] Clause 14: A base station (BS) configured for full-duplex (FD) wireless communication, the BS comprising: a memory; and a processor coupled to the memory, the memory and the processor being configured to: receive from a user equipment (UE) a request to modify one or more parameters for FD communication between the UE and one or more BSs including the BS, based on the one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception at the UE of an uplink transmission sent by the UE and (ii) the start of reception at the UE of a downlink transmission from at least one of the one or more BSs, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource; and perform one or more of the following: send one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the other BS; or communicate with the UE using the one or more modified parameters.

[0454] Clause 15: The BS of clause 14, wherein the threshold comprises a cyclic prefix (CP) length as defined by the one or more parameters.

[0455] Clause 16: A BS according to any one of clauses 14 and 15, wherein the reception at the UE of the uplink transmission sent by the UE includes the reception of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein the reception at the UE of the downlink transmission from at least one of the one or more BSs includes the reception of the downlink transmission from at least one of the one or more BSs at the one or more antenna panels of the UE.

[0456] Clause 17: A BS according to any of clauses 14-16, wherein the one or more parameters include one or more of the following: a subcarrier spacing (SCS), a duration of a cyclic prefix (CP), a downlink and uplink beam pair for FD communication, or a frequency domain separation between the uplink transmission and the downlink transmission for FD communication.

[0457] Clause 18: A BS as set forth in any of clauses 14-17, wherein the request to modify the one or more parameters comprises a request to reduce a subcarrier spacing (SCS) for FD communications.

[0458] Clause 19: A BS as set out in any of clauses 14-18, wherein the request to modify the one or more parameters comprises a request to increase a duration of a cyclic prefix (CP).

[0459] Clause 20: The BS of clause 19, wherein a subcarrier spacing (SCS) defined in the one or more parameters is greater than 60 kHz.

[0460] Clause 21: A BS as set out in any of clauses 14-20, wherein the request to increase the duration of the CP comprises a request to use an extended CP (ECP).

[0461] Clause 22: A BS as set forth in any of clauses 14-21, wherein the request to modify the one or more parameters comprises a request to change downlink and uplink beam pairs used for FD communications.

[0462] Clause 23: A BS as set forth in any of clauses 14-22, wherein the request to modify the one or more parameters comprises a request to increase frequency domain separation between the uplink transmission and the downlink transmission for FD communications.

[0463] Clause 24: A BS as set forth in any of clauses 14-23, wherein the request comprises an amount by which the frequency domain separation as a guard band is to be increased.

[0464] Clause 25: A BS according to any of clauses 14-24, wherein the request to modify the one or more parameters is received via one or more of a medium access control-control element (MAC-CE), an uplink control information (UCI), or a radio resource control (RRC) message.

[0465] Clause 26: A BS as described in any of clauses 14-25, the memory and the processor being configured to: send an indication of the one or more modified parameters to the UE based on the request.

[0466] Clause 27: A method for full-duplex (FD) wireless communication performed by a user equipment (UE), the method comprising: sending a request to modify one or more parameters for FD communication between the UE and one or more BSs including a base station (BS) to the BS based on the one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception at the UE of an uplink transmission sent by the UE and (ii) the start of reception at the UE of a downlink transmission from at least one of the one or more BSs, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource; and communicating with the one or more BSs using the one or more modified parameters based on the request.

[0467] Clause 28: A UE as described in clause 27, wherein the threshold comprises a cyclic prefix (CP) length as defined by the one or more parameters.

[0468] Clause 29: A UE according to any one of clauses 27 and 28, wherein reception at the UE of the uplink transmission sent by the UE includes reception of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein reception at the UE of the downlink transmission from at least one of the one or more BSs includes reception of the downlink transmission from at least one of the one or more BSs at the one or more antenna panels of the UE.

[0469] Clause 30: A UE according to any of clauses 27-29, wherein the one or more parameters include one or more of the following: a subcarrier spacing (SCS), a duration of a cyclic prefix (CP), a downlink and uplink beam pair for FD communication, or a frequency domain separation between the uplink transmission and the downlink transmission for FD communication.

[0470] Clause 31: A UE as set out in any of clauses 27-30, wherein the request to modify the one or more parameters comprises a request to reduce a subcarrier spacing (SCS) for FD communications.

[0471] Clause 32: A UE as set out in any of clauses 27-31, wherein the request to modify the one or more parameters comprises a request to increase the duration of a cyclic prefix (CP).

[0472] Clause 33: A UE as described in any of clauses 27-32, wherein the subcarrier spacing (SCS) defined in the one or more parameters is greater than 60kHz.

[0473] Clause 34: A UE as set out in any of clauses 27-33, wherein the request to increase the duration of the CP comprises a request to use an extended CP (ECP).

[0474] Clause 35: A UE as set out in any of clauses 27-34, wherein the request to modify the one or more parameters comprises a request to change downlink and uplink beam pairs used for FD communications.

[0475] Clause 36: A UE as set out in any of clauses 27-35, wherein the request to modify the one or more parameters comprises a request to increase frequency domain separation between the uplink transmission and the downlink transmission for FD communications.

[0476] Clause 37: A UE as set out in any of clauses 27-36, wherein the request comprises an amount by which the frequency domain separation as a guard band is to be increased.

[0477] Clause 38: A UE according to any of clauses 27-37, wherein the request to modify the one or more parameters is sent via one or more of a Medium Access Control-Control Element (MAC-CE), an Uplink Control Information (UCI) or a Radio Resource Control (RRC) message.

[0478] Clause 39: A UE as described in any of clauses 27-38, the memory and the processor being configured to: receive from the BS the one or more modified parameters based on the request.

[0479] Clause 40: A method for full-duplex (FD) wireless communication performed by a base station (BS), the method comprising: receiving from a user equipment (UE) a request to modify one or more parameters for FD communication between the UE and one or more BSs including the BS, based on the one or more parameters causing a time difference greater than a threshold, the time difference being between (i) the start of reception at the UE of an uplink transmission sent by the UE and (ii) the start of reception at the UE of a downlink transmission from at least one of the one or more BSs, the uplink transmission and the downlink transmission corresponding to the same scheduled time resource; and performing one or more of the following: sending one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the other BS; or communicating with the UE using the one or more modified parameters.

[0480] Clause 41: The BS of clause 40, wherein the threshold comprises a cyclic prefix (CP) length as defined by the one or more parameters.

[0481] Clause 42: A BS according to any one of clauses 40 and 41, wherein the reception at the UE of the uplink transmission sent by the UE includes the reception of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein the reception at the UE of the downlink transmission from at least one of the one or more BSs includes the reception of the downlink transmission from at least one of the one or more BSs at the one or more antenna panels of the UE.

[0482] Clause 43: A BS according to any of clauses 40-42, wherein the one or more parameters include one or more of the following: a subcarrier spacing (SCS), a duration of a cyclic prefix (CP), a downlink and uplink beam pair for FD communication, or a frequency domain separation between the uplink transmission and the downlink transmission for FD communication.

[0483] Clause 44: A BS as set forth in any of clauses 40-43, wherein the request to modify the one or more parameters comprises a request to reduce a subcarrier spacing (SCS) for FD communications.

[0484] Clause 45: A BS as set forth in any of clauses 40-44, wherein the request to modify the one or more parameters comprises a request to increase a duration of a cyclic prefix (CP).

[0485] Clause 46: A BS as described in any of clauses 40-45, wherein the subcarrier spacing (SCS) defined in the one or more parameters is greater than 60kHz.

[0486] Clause 47: A BS as set out in any of clauses 40-46, wherein the request to increase the duration of the CP comprises a request to use an extended CP (ECP).

[0487] Clause 48: A BS as set forth in any of clauses 40-47, wherein the request to modify the one or more parameters comprises a request to change downlink and uplink beam pairs used for FD communications.

[0488] Clause 49: A BS as set forth in any of clauses 40-48, wherein the request to modify the one or more parameters comprises a request to increase frequency domain separation between the uplink transmission and the downlink transmission for FD communications.

[0489] Clause 50: A BS as set forth in any of clauses 40-49, wherein the request comprises an amount of the frequency domain separation to be increased as a guard band.

[0490] Clause 51: A BS according to any of clauses 40-50, wherein the request to modify the one or more parameters is received via one or more of a medium access control-control element (MAC-CE), an uplink control information (UCI), or a radio resource control (RRC) message.

[0491] Clause 52: A BS as described in any of clauses 40-51, wherein the memory and the processor are further configured to: send an indication of the one or more modified parameters to the UE based on the request.

[0492] Clause 53: A UE comprising means for performing the method according to any of clauses 27-39.

[0493] Clause 54: A non-transitory computer-readable medium comprising executable instructions which, when executed by one or more processors of a UE, cause the UE to perform a method according to any of clauses 27-39.

[0494] Clause 55: A computer program product embodied on a computer readable storage medium, comprising code for performing the method according to any of clauses 27-39.

[0495] Clause 56: A BS comprising means for performing the method according to any of clauses 40-52.

[0496] Clause 57: A non-transitory computer readable medium comprising executable instructions which, when executed by one or more processors of a BS, cause the BS to perform a method according to any of clauses 40-52.

[0497] Clause 58: A computer program product embodied on a computer readable storage medium, comprising code for performing the method according to any of clauses 40-52.

[0498] Clause 59: A method of wireless communication at a user equipment, the method comprising: determining that a first subcarrier spacing (SCS) for a first transmission is 120 kHz or 240 kHz; identifying an extended cyclic prefix (ECP) associated with the first SCS; and encoding or decoding the first transmission, wherein the encoding or decoding of the first transmission is based on the ECP.

[0499] Clause 60: The method of clause 60, wherein the first transmission is for full-duplex communication between the user equipment and a base station.

[0500] Clause 58: The method according to clause 60 further includes: measuring a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and determining that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; wherein the identifying the ECP associated with the first SCS includes selecting the ECP after determining that the timing difference is greater than the length of the normal CP used for the first SCS.

[0501] Clause 61: The method according to clause 60 further includes: determining that the first transmission is for full-duplex communication; wherein the identifying the ECP associated with the first SCS also includes selecting the ECP after determining that the first transmission is for full-duplex communication.

[0502] Clause 62: A method according to clause 60, wherein: the determining that the first SCS used for the first transmission is 120 kHz or 240 kHz includes: receiving a first indication of the first SCS from a base station; and the identifying the ECP includes: receiving a second indication of the ECP from the base station.

[0503] Clause 63: The method according to clause 60 further includes: measuring a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and determining that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; and sending a request to a base station after determining that the timing difference is greater than the length of the normal CP used for the first SCS, wherein the request includes at least one of the following: a request for a smaller SCS, a request for using an extended CP instead of a normal CP, a request for switching to a different beam pair, a request for additional frequency domain separation, or a combination thereof.

[0504] Clause 64: The method according to clause 60 further includes: measuring a timing difference between a first timing for downlink transmission received at the user equipment and a second timing for uplink transmission received at the user equipment; and sending an indication of the timing difference to a base station.

[0505] Clause 65: A user device comprising: a transceiver; a memory; and a processor communicatively coupled to the transceiver and the memory, wherein the processor and the memory are configured to: determine whether a first subcarrier spacing (SCS) for a first transmission sent or received via the transceiver is 120 kHz or 240 kHz; identify an extended cyclic prefix (ECP) associated with the first SCS; and encode or decode the first transmission, wherein encoding or decoding the first transmission is based on the ECP.

[0506] Clause 66: The user equipment of clause 65, wherein the first transmission is for full duplex communication between the user equipment and a base station.

[0507] Clause 67: A user device according to clause 65, wherein the processor and the memory are further configured to: measure a timing difference between a first timing for a downlink transmission received at the user device and a second timing for an uplink transmission received at the user device; and determine that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; wherein identifying the ECP associated with the first SCS includes selecting the ECP after determining that the timing difference is greater than the length of the normal CP used for the first SCS.

[0508] Clause 68: A user device according to clause 65, wherein the processor and the memory are further configured to: determine that the first transmission is for full-duplex communication; wherein identifying the ECP associated with the first SCS includes selecting the ECP after determining that the first transmission is for full-duplex communication.

[0509] Clause 69: A user device according to clause 65, wherein: determining that the first SCS used for the first transmission is 120 kHz or 240 kHz includes: receiving a first indication of the first SCS from a base station; and identifying the ECP includes: receiving a second indication of the ECP from the base station.

[0510] Clause 70: A user equipment according to clause 65, wherein the processor and the memory are further configured to: measure a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; determine that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; and send a request to a base station after determining that the timing difference is greater than the length of the normal CP used for the first SCS, wherein the request includes at least one of the following: a request for a smaller SCS, a request for using an extended CP instead of a normal CP, a request for switching to a different beam pair, a request for additional frequency domain separation, or a combination thereof.

[0511] Clause 71: A user equipment according to clause 65, wherein the processor and the memory are further configured to: measure a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and send an indication of the timing difference to a base station.

[0512] Clause 72: A user equipment comprising: a unit for determining whether a first subcarrier spacing (SCS) for a first transmission is 120 kHz or 240 kHz; a unit for identifying an extended cyclic prefix (ECP) associated with the first SCS; and a unit for encoding or decoding the first transmission, wherein the encoding or decoding of the first transmission is based on the ECP.

[0513] Clause 73: An article for use with a user equipment in a wireless communication network, the article comprising: a computer-readable medium having instructions stored therein executable by one or more processors of the user equipment to: determine whether a first subcarrier spacing (SCS) for a first transmission is 120 kHz or 240 kHz; identify an extended cyclic prefix (ECP) associated with the first SCS; and encode or decode the first transmission, wherein the encoding or decoding of the first transmission is based on the ECP.

[0514] Clause 74: A method of wireless communication at a base station, the method comprising: specifying a first subcarrier spacing (SCS) for a first transmission to be 120 kHz or 240 kHz; identifying an extended cyclic prefix (ECP) associated with the first SCS; and encoding or decoding the first transmission, wherein the encoding or decoding of the first transmission is based on the ECP.

[0515] Clause 75: The method of clause 74, wherein the first transmission is for full-duplex communication between the base station and user equipment.

[0516] Clause 76: The method according to clause 74 further includes: receiving an indication of a timing difference measured between a first timing for a downlink transmission received at a user equipment and a second timing for an uplink transmission received at the user equipment; and determining that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; wherein the identifying the ECP associated with the first SCS includes selecting the ECP after determining that the timing difference is greater than the length of the normal CP used for the first SCS.

[0517] Clause 77: The method according to clause 74 further includes: determining that the first transmission is for full-duplex communication; wherein the identifying the ECP associated with the first SCS includes selecting the ECP after determining that the first transmission is for full-duplex communication.

[0518] Clause 78: The method according to clause 74 also includes: sending a first indication of the first SCS to a user equipment; and sending a second indication of the ECP to the user equipment.

[0519] Clause 79: The method according to clause 74 further includes: receiving a request from a user device, wherein the request includes at least one of the following: a request for a smaller SCS for full-duplex communication, a request for using an extended cyclic prefix (CP) instead of a normal CP for full-duplex communication, a request for switching to a different beam pair for full-duplex communication, a request for additional frequency domain separation for full-duplex communication, or a combination thereof.

[0520] Clause 80: The method according to clause 74 further includes: receiving an indication of a timing difference measured between a first timing for a downlink transmission received at a user equipment and a second timing for an uplink transmission received at the user equipment; determining that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; and after determining that the timing difference is greater than the length of the normal CP used for the first SCS, performing at least one of the following: selecting a smaller SCS for full-duplex communication with the user equipment, selecting an extended CP instead of a normal CP for full-duplex communication with the user equipment, switching to a different beam pair for full-duplex communication with the user equipment, increasing frequency domain separation for full-duplex communication with the user equipment, or a combination thereof.

[0521] Clause 81: A base station comprising: a transceiver; a memory; and a processor communicatively coupled to the transceiver and the memory, wherein the processor and the memory are configured to: specify a first subcarrier spacing (SCS) for a first transmission sent or received via the transceiver to be 120 kHz or 240 kHz; identify an extended cyclic prefix (ECP) associated with the first SCS; and encode or decode the first transmission, wherein the encoding or decoding of the first transmission is based on the ECP.

[0522] Clause 82: The base station of clause 81, wherein the first transmission is for full-duplex communication between the base station and a user equipment.

[0523] Clause 83: A base station according to clause 81, wherein the processor and the memory are further configured to: receive an indication of a timing difference measured between a first timing for a downlink transmission received at a user equipment and a second timing for an uplink transmission received at the user equipment; and determine that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; wherein identifying the ECP associated with the first SCS includes selecting the ECP after determining that the timing difference is greater than the length of the normal CP used for the first SCS.

[0524] Clause 84: A base station according to clause 81, wherein the processor and the memory are further configured to: determine that the first transmission is for full-duplex communication; wherein identifying the ECP associated with the first SCS includes selecting the ECP after determining that the first transmission is for full-duplex communication.

[0525] Clause 85: A base station according to clause 81, wherein the processor and the memory are further configured to: send a first indication of the first SCS to a user equipment; and send a second indication of the ECP to the user equipment.

[0526] Clause 86: A base station according to clause 81, wherein the processor and the memory are further configured to: receive a request from a user equipment, wherein the request includes at least one of the following: a request for a smaller SCS for full-duplex communication, a request for using an extended cyclic prefix (CP) instead of a normal CP for full-duplex communication, a request for switching to a different beam pair for full-duplex communication, a request for additional frequency domain separation for full-duplex communication, or a combination thereof.

[0527] Clause 87: A base station according to clause 81, wherein the processor and the memory are further configured to: receive an indication of a timing difference measured between a first timing for a downlink transmission received at a user equipment and a second timing for an uplink transmission received at the user equipment; determine that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; and after determining that the timing difference is greater than the length of the normal CP used for the first SCS, perform at least one of the following: select a smaller SCS for full-duplex communication with the user equipment, select an extended CP instead of a normal CP for full-duplex communication with the user equipment, switch to a different beam pair for full-duplex communication with the user equipment, increase frequency domain separation for full-duplex communication with the user equipment, or a combination thereof.

[0528] Clause 88: A base station comprising: a unit for specifying that a first subcarrier spacing (SCS) for a first transmission is 120 kHz or 240 kHz; a unit for identifying an extended cyclic prefix (ECP) associated with the first SCS; and a unit for encoding or decoding the first transmission, wherein the encoding or decoding of the first transmission is based on the ECP.

[0529] Clause 89: An article for use with a base station in a wireless communication network, the article comprising: a computer-readable medium having instructions stored therein executable by one or more processors of the base station to: specify a first subcarrier spacing (SCS) for a first transmission to be 120 kHz or 240 kHz; identify an extended cyclic prefix (ECP) associated with the first SCS; and encode or decode the first transmission, wherein the encoding or decoding of the first transmission is based on the ECP.

[0530] Clause 90: A method of wireless communication at a user equipment, the method comprising: receiving a first indication from a base station; determining that the first indication specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); and communicating with the base station using the first configurable ECP designated for the first SCS.

[0531] Clause 91: The method of clause 90, wherein the first indication further specifies a length of the first configurable ECP.

[0532] Clause 92: The method of clause 90, wherein the first indication further specifies that the first SCS is 120 kHz or 240 kHz.

[0533] Clause 93: A method according to clause 90, wherein receiving the first indication from the base station includes: receiving the first indication via a medium access control-control element (MAC-CE), downlink control information (DCI) or a radio resource control (RRC) message.

[0534] Clause 94: The method of clause 90, further comprising: prior to said receiving said first indication from said base station, sending a request for said first configurable ECP to said base station.

[0535] Clause 95: The method of clause 90, wherein the request comprises a request to use the first configurable ECP instead of a normal cyclic prefix for the first SCS.

[0536] Clause 96: The method of clause 90, wherein the request specifies a length of the first configurable ECP.

[0537] Clause 97: The method of clause 90, wherein the request specifies that the first SCS is 120 kHz or 240 kHz.

[0538] Clause 98: A method according to clause 90, wherein the sending of the request for the first configurable ECP to the base station includes sending the request via a medium access control-control element (MAC-CE), uplink control information (UCI), or a radio resource control (RRC) message.

[0539] Clause 99: The method according to clause 90 further includes: measuring a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and determining that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; wherein the sending of the request for the first configurable ECP includes sending the request after determining that the timing difference is greater than the length of the normal CP used for the first SCS.

[0540] Clause 100: The method of clause 90, further comprising: determining that the transmission is for full-duplex communication; wherein the sending the request for the first configurable ECP further comprises sending the request after the determining that the transmission is for full-duplex communication.

[0541] Clause 101: The method according to clause 90 further includes: measuring a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; determining that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; and after determining that the timing difference is greater than the length of the normal CP used for the first SCS, sending a request to the base station, wherein the request includes at least one of the following: a request for a smaller SCS, a request for switching to a different beam pair, a request for additional frequency domain separation, or a combination thereof.

[0542] Clause 102: The method according to clause 90 further includes: measuring a timing difference between a first timing for downlink transmission received at the user equipment and a second timing for uplink transmission received at the user equipment; and sending an indication of the timing difference to the base station.

[0543] Clause 103: A user device comprising: a transceiver; a memory; and a processor communicatively coupled to the transceiver and the memory, wherein the processor and the memory are configured to: receive a first indication from a base station via the transceiver; determine that the first indication specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); and communicate with the base station via the transceiver using the first configurable ECP specified for the first SCS.

[0544] Clause 104: The user equipment of clause 103, wherein the first indication further specifies a length of the first configurable ECP.

[0545] Clause 105: The user equipment of clause 103, wherein the first indication further specifies that the first SCS is 120 kHz or 240 kHz.

[0546] Clause 106: A user equipment according to clause 103, wherein the processor and the memory are further configured to: receive the first indication via a medium access control-control element (MAC-CE), downlink control information (DCI) or a radio resource control (RRC) message.

[0547] Clause 107: The user equipment of clause 103, wherein the processor and the memory are further configured to: send a request for the first configurable ECP to the base station before the receiving the first indication from the base station.

[0548] Clause 108: The user equipment of clause 103, wherein the request comprises a request to use the first configurable ECP instead of a normal cyclic prefix for the first SCS.

[0549] Clause 109: The user equipment of clause 103, wherein the request specifies a length of the first configurable ECP.

[0550] Clause 110: The user equipment of clause 103, wherein the request specifies that the first SCS is 120 kHz or 240 kHz.

[0551] Clause 111: A user equipment according to clause 103, wherein the processor and the memory are further configured to: send the request via a medium access control-control element (MAC-CE), uplink control information (UCI), or a radio resource control (RRC) message.

[0552] Clause 112: A user device according to clause 103, wherein the processor and the memory are further configured to: measure a timing difference between a first timing for a downlink transmission received at the user device and a second timing for an uplink transmission received at the user device; and determine that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; wherein sending the request for the first configurable ECP includes sending the request after determining that the timing difference is greater than the length of the normal CP used for the first SCS.

[0553] Clause 113: A user device according to clause 103, wherein the processor and the memory are further configured to: determine that the transmission is for full-duplex communication; wherein sending the request for the first configurable ECP includes sending the request after determining that the transmission is for full-duplex communication.

[0554] Clause 114: A user equipment according to clause 103, wherein the processor and the memory are further configured to: measure a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; determine that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; and after determining that the timing difference is greater than the length of the normal CP used for the first SCS, send a request to the base station, wherein the request includes at least one of the following: a request for a smaller SCS, a request for switching to a different beam pair, a request for additional frequency domain separation, or a combination thereof.

[0555] Clause 115: A user equipment according to clause 103, wherein the processor and the memory are further configured to: measure a timing difference between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; and send an indication of the timing difference to the base station.

[0556] Clause 116: A user equipment comprising: a unit for receiving a first indication from a base station; a unit for determining that the first indication specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); and a unit for communicating with the base station using the first configurable ECP specified for the first SCS.

[0557] Clause 117: An article for use with a user equipment in a wireless communication network, the article comprising: a computer-readable medium having instructions stored therein executable by one or more processors of the user equipment to: receive a first indication from a base station; determine that the first indication specifies a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); and communicate with the base station using the first configurable ECP specified for the first SCS.

[0558] Clause 118: A method of wireless communication at a base station, the method comprising: generating a first indication specifying a first configurable extended cyclic prefix (ECP) to be used for a first subcarrier spacing (SCS); sending the first indication to a user equipment; and communicating with the user equipment using the first configurable ECP designated for the first SCS.

[0559] Clause 119: The method of clause 118, wherein the first indication further specifies a length of the first configurable ECP.

[0560] Clause 120: The method of clause 118, wherein the first indication further specifies that the first SCS is 120 kHz or 240 kHz.

[0561] Clause 121: A method according to clause 118, wherein sending the first indication to the user equipment includes: sending the first indication via a medium access control-control element (MAC-CE), downlink control information (DCI) or a radio resource control (RRC) message.

[0562] Clause 122: The method of clause 118, further comprising: prior to said sending said first indication to said user equipment, receiving a request for said first configurable ECP from said user equipment.

[0563] Clause 123: The method of clause 118, wherein the request comprises a request to use the first configurable ECP instead of a normal cyclic prefix for the first SCS.

[0564] Clause 124: The method of clause 118, wherein the request specifies a length of the first configurable ECP.

[0565] Clause 125: The method of clause 118, wherein the request specifies that the first SCS is 120 kHz or 240 kHz.

[0566] Clause 126: A method according to clause 118, wherein the receiving the request for the first configurable ECP from the user equipment includes: receiving the request via a medium access control-control element (MAC-CE), uplink control information (UCI), or a radio resource control (RRC) message.

[0567] Clause 127: The method according to clause 118 further includes: receiving an indication of a timing difference measured between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; determining that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; and after determining that the timing difference is greater than the length of the normal CP used for the first SCS, selecting the first configurable ECP for the first SCS.

[0568] Clause 128: The method of clause 118, further comprising: designating the first SCS for full-duplex communication; and after designating the first SCS for the full-duplex communication, selecting the first configurable ECP for the first SCS.

[0569] Clause 129: The method according to clause 118 further includes: receiving a request from the user equipment, wherein the request includes at least one of the following: a request for a smaller SCS for full-duplex communication, a request for switching to a different beam pair for full-duplex communication, a request for additional frequency domain separation for full-duplex communication, or a combination thereof.

[0570] Clause 130: The method according to clause 118 further includes: receiving an indication of a timing difference measured between a first timing for a downlink transmission received at the user equipment and a second timing for an uplink transmission received at the user equipment; determining that the timing difference is greater than the length of a normal cyclic prefix (CP) used for the first SCS; and after determining that the timing difference is greater than the length of the normal CP used for the first SCS, performing at least one of the following: selecting a smaller SCS for full-duplex communication with the user equipment, switching to a different beam pair for full-duplex communication with t...

Claims

1. A user equipment (UE) configured for full-duplex (FD) wireless communication, the UE comprising: one or more memories; as well as one or more processors coupled to the one or more memories, the one or more processors configured to: sending a request to a base station (BS) to modify one or more parameters for FD communication between the UE and one or more BSs including the BS, wherein the request is based on the one or more parameters resulting in a time difference greater than a threshold, wherein the time difference is between (i) a start of reception at the UE of energy from an uplink transmission sent by the UE and (ii) a start of reception at the UE of a downlink transmission from at least one of the one or more BSs, wherein the uplink transmission and the downlink transmission correspond to the same scheduled time resource; and Communicating with the one or more BSs using the one or more modified parameters based on the request.

2. The UE according to claim 1, wherein: The threshold includes a cyclic prefix (CP) length defined by the one or more parameters.

3. The UE according to claim 1, wherein: The reception of the energy of the uplink transmission sent by the UE at the UE includes the reception of the energy of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein the reception of the downlink transmission from at least one of the one or more BSs at the UE includes the reception of the downlink transmission from at least one of the one or more BSs at the one or more antenna panels of the UE.

4. The UE according to claim 1, wherein: The one or more parameters include one or more of the following: a subcarrier spacing (SCS), a duration of a cyclic prefix (CP), a downlink and uplink beam pair for FD communication, or a frequency domain separation between the uplink transmission and the downlink transmission for FD communication.

5. The UE according to claim 1, wherein: The request to modify the one or more parameters includes a request to decrease a subcarrier spacing (SCS) for FD communications.

6. The UE according to claim 1, wherein: The request to modify the one or more parameters comprises a request to increase a duration of a cyclic prefix (CP).

7. The UE according to claim 6, wherein: A subcarrier spacing (SCS) defined in the one or more parameters is greater than 60 kHz.

8. The UE according to claim 6, wherein: The request to increase the duration of the CP includes a request to use an extended CP (ECP).

9. The UE according to claim 1, wherein: The request to modify the one or more parameters includes a request to change downlink and uplink beam pairs used for FD communication.

10. The UE according to claim 1, wherein: The request to modify the one or more parameters includes a request to increase frequency domain separation between the uplink transmission and the downlink transmission for FD communications.

11. The UE according to claim 10, wherein: The request includes an amount to increase the frequency domain separation as a guard band.

12. The UE according to claim 1, wherein: The request to modify the one or more parameters is sent via one or more of a Medium Access Control-Control Element (MAC-CE), an Uplink Control Information (UCI), or a Radio Resource Control (RRC) message.

13. The UE according to claim 1, wherein: The one or more processors are further configured to receive the one or more modified parameters from the BS.

14. The UE according to claim 3, wherein: The reception of the downlink transmission from at least one of the one or more BSs at the UE includes the reception of the downlink transmission from at least one of the one or more BSs at a first antenna panel of the UE, and wherein the reception of the energy from the uplink transmission sent by the UE at the UE includes the reception of the energy of the uplink transmission sent by the UE at a second antenna panel of the UE.

15. A base station (BS) configured for full-duplex (FD) wireless communication, the BS comprising: one or more memories; as well as one or more processors coupled to the one or more memories, the one or more processors configured to: receiving, from a user equipment (UE), a request to modify one or more parameters for FD communication between the UE and one or more BSs including the BS, wherein the request is based on the one or more parameters resulting in a time difference greater than a threshold, wherein the time difference is between (i) a start of reception at the UE of energy from an uplink transmission sent by the UE and (ii) a start of reception at the UE of a downlink transmission from at least one of the one or more BSs, wherein the uplink transmission and the downlink transmission correspond to the same scheduled time resource; and Do one or more of the following: sending one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the another BS; or The one or more modified parameters are used to communicate with the UE.

16. The BS according to claim 15, wherein: The threshold includes a cyclic prefix (CP) length defined by the one or more parameters.

17. The BS according to claim 15, wherein: The reception of the energy of the uplink transmission sent by the UE at the UE includes the reception of the energy of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein the reception of the downlink transmission from at least one of the one or more BSs at the UE includes the reception of the downlink transmission from at least one of the one or more BSs at the one or more antenna panels of the UE.

18. The BS according to claim 15, wherein: The one or more parameters include one or more of: a subcarrier spacing (SCS), a duration of a cyclic prefix (CP), a downlink and uplink beam pair for FD communication, or a frequency domain separation between the uplink transmission and the downlink transmission for FD communication.

19. The BS according to claim 15, wherein: The request to modify the one or more parameters includes a request to decrease a subcarrier spacing (SCS) for FD communications.

20. The BS according to claim 15, wherein: The request to modify the one or more parameters comprises a request to increase a duration of a cyclic prefix (CP).

21. The BS according to claim 20, wherein: A subcarrier spacing (SCS) defined in the one or more parameters is greater than 60 kHz.

22. The BS according to claim 20, wherein: The request to increase the duration of the CP includes a request to use an extended CP (ECP).

23. The BS according to claim 15, wherein: The request to modify the one or more parameters includes a request to change downlink and uplink beam pairs used for FD communication.

24. The BS according to claim 15, wherein: The request to modify the one or more parameters includes a request to increase frequency domain separation between the uplink transmission and the downlink transmission for FD communications.

25. The BS according to claim 24, wherein: The request includes an amount to increase the frequency domain separation as a guard band.

26. The BS according to claim 15, wherein: The request to modify the one or more parameters is received via one or more of a Medium Access Control-Control Element (MAC-CE), an Uplink Control Information (UCI), or a Radio Resource Control (RRC) message.

27. The BS according to claim 15, wherein: The one or more processors are further configured to send an indication of the one or more modified parameters to the UE based on the request.

28. A method of full-duplex (FD) wireless communication performed by a user equipment (UE), the method comprising: sending a request to a base station (BS) to modify one or more parameters for FD communication between the UE and one or more BSs including the BS, wherein the request is based on the one or more parameters resulting in a time difference greater than a threshold, wherein the time difference is between (i) a start of reception at the UE of energy from an uplink transmission sent by the UE and (ii) a start of reception at the UE of a downlink transmission from at least one of the one or more BSs, wherein the uplink transmission and the downlink transmission correspond to the same scheduled time resource; and Communicating with the one or more BSs using the one or more modified parameters based on the request.

29. The method according to claim 28, wherein: The reception of the energy of the uplink transmission sent by the UE at the UE includes the reception of the energy of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein the reception of the downlink transmission from at least one of the one or more BSs at the UE includes the reception of the downlink transmission from at least one of the one or more BSs at the one or more antenna panels of the UE.

30. A method for full-duplex (FD) wireless communication performed by a base station (BS), the method comprising: receiving, from a user equipment (UE), a request to modify one or more parameters for FD communication between the UE and one or more BSs including the BS, wherein the request is based on the one or more parameters resulting in a time difference greater than a threshold, wherein the time difference is between (i) a start of reception at the UE of energy from an uplink transmission sent by the UE and (ii) a start of reception at the UE of a downlink transmission from at least one of the one or more BSs, wherein the uplink transmission and the downlink transmission correspond to the same scheduled time resource; and Do one or more of the following: sending one or more modified parameters to another BS of the one or more BSs in response to the request, the one or more modified parameters indicating parameters for FD communication between the UE and the another BS; or The one or more modified parameters are used to communicate with the UE.

31. The method according to claim 30, wherein: The reception of the energy of the uplink transmission sent by the UE at the UE includes the reception of the energy of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein the reception of the downlink transmission from at least one of the one or more BSs at the UE includes the reception of the downlink transmission from at least one of the one or more BSs at the one or more antenna panels of the UE.

32. A non-transitory computer-readable medium having instructions stored thereon, the instructions, when executed by a user equipment (UE), causing the UE to perform operations comprising: sending a request to a base station (BS) to modify one or more parameters for FD communication between the UE and one or more BSs including the BS, wherein the request is based on the one or more parameters resulting in a time difference greater than a threshold, wherein the time difference is between (i) a start of reception at the UE of energy from an uplink transmission sent by the UE and (ii) a start of reception at the UE of a downlink transmission from at least one of the one or more BSs, wherein the uplink transmission and the downlink transmission correspond to the same scheduled time resource; and Communicating with the one or more BSs using the one or more modified parameters based on the request.

33. The non-transitory computer readable medium of claim 32, wherein: The reception of the energy of the uplink transmission sent by the UE at the UE includes the reception of the energy of the uplink transmission sent by the UE at one or more antenna panels of the UE, and wherein the reception of the downlink transmission from at least one of the one or more BSs at the UE includes the reception of the downlink transmission from at least one of the one or more BSs at the one or more antenna panels of the UE.

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