Downlink transmission indication for rach occasions

Abstract

Certain aspects of the present disclosure provide techniques for indicating overlap of downlink transmissions with one or more random access channel occasions (ROs). A method that can be performed by a user equipment (UE) includes receiving, from a base station (BS), signaling including an indication of whether one or more ROs will overlap with downlink transmissions in one or more time periods, transmitting, to the BS, a random access channel (RACH) preamble in an RO of the one or more ROs during the one or more time periods based on the indication, and performing, with the BS, a RACH procedure based on the transmitted RACH preamble.

Description

[0001] Cross-references to related applications

[0002] This application claims priority to U.S. Application No. 17 / 191,374, filed March 3, 2021, which has been assigned to the assignee of this application and is hereby incorporated by reference as fully set forth below and expressly incorporated herein for all applicable purposes.

[0003] introduction

[0004] Various aspects of this disclosure relate to wireless communications, and more particularly to techniques for indicating the overlap of downlink transmissions with the timing of one or more random access channels.

[0005] Wireless communication systems are widely deployed to provide a variety of telecommunications services, such as telephone, video, data, messaging, broadcasting, or other similar services. These wireless communication systems can employ multiple access technologies that enable communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, or other resources). Multiple access technologies can rely on code division, time division, frequency division, orthogonal frequency division, single-carrier frequency division, or time-division synchronous code division, to name just a few. These and other multiple access technologies have been adopted in various telecommunications standards to provide a common protocol enabling different wireless devices to communicate at the city, national, regional, and even global levels.

[0006] Despite the significant technological advancements in wireless communication systems over the years, challenges remain. These challenges, for example, may relate to the timing (RO) of selecting the Random Access Channel (RACH) for accessing the wireless communication system. Therefore, there is a need to further improve wireless communication systems to overcome these challenges.

[0007] Overview

[0008] Some aspects can be implemented in a wireless communication method performed by a user equipment (UE). This method generally includes receiving from a base station (BS) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; transmitting a random access channel (RACH) preamble to the BS in one of the one or more ROs during the one or more time periods based on the indication; and performing RACH procedures with the BS based on the transmitted RACH preamble.

[0009] Certain aspects can be implemented in an apparatus for wireless communication by a user equipment (UE). The apparatus may include a memory and a processor coupled to the memory, the memory and the processor being configured to: receive from a base station (BS) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; transmit a random access channel (RACH) preamble to the BS in one of the one or more ROs during the one or more time periods based on the indication; and perform RACH procedures with the BS based on the transmitted RACH preamble.

[0010] Certain aspects can be implemented in an apparatus for wireless communication by a user equipment (UE). The apparatus may include means for receiving from a base station (BS) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; means for transmitting a random access channel (RACH) preamble to the BS in one of the one or more ROs during the one or more time periods based on the indication; and means for performing RACH procedures with the BS based on the transmitted RACH preamble.

[0011] Certain aspects may be implemented in a non-transient computer-readable medium for wireless communication by a user equipment (UE). The non-transient computer-readable medium may include computer-executable instructions that, when executed by one or more processors of a processing system, cause the processing system to: receive from a base station (BS) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; transmit a random access channel (RACH) preamble to the BS in one of the one or more ROs during the one or more time periods based on the indication; and perform RACH procedures with the BS based on the transmitted RACH preamble.

[0012] Certain aspects may be implemented in a computer program product for wireless communication by a user equipment (UE) contained on a computer-readable storage medium. The computer-readable storage medium may include code for: receiving from a base station (BS) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; transmitting a random access channel (RACH) preamble to the BS in one of the one or more ROs during the one or more time periods based on the indication; and performing RACH procedures with the BS based on the transmitted RACH preamble.

[0013] Some aspects can be implemented in a wireless communication method performed by a base station (BS). This method generally includes transmitting signaling to a user equipment (UE) including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; receiving a random access channel (RACH) preamble from the UE in one of the one or more ROs during the one or more time periods based on the indication; and performing RACH procedures with the UE based on the received RACH preamble.

[0014] Certain aspects can be implemented in an apparatus for wireless communication by a base station (BS). The apparatus may include a memory and a processor coupled to the memory, the memory and the processor being configured to: transmit to a user equipment (UE) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; receive a random access channel (RACH) preamble from the UE in one of the one or more ROs during the one or more time periods based on the indication; and perform RACH procedures with the UE based on the received RACH preamble.

[0015] Certain aspects can be implemented in an apparatus for wireless communication by a base station (BS). The apparatus may include: means for transmitting to a user equipment (UE) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; means for receiving a random access channel (RACH) preamble from the UE in one of the one or more ROs during the one or more time periods based on the indication; and means for performing RACH procedures with the UE based on the received RACH preamble.

[0016] Certain aspects may be implemented in a non-transient computer-readable medium for wireless communication by a base station (BS). The non-transient computer-readable medium may include computer-executable instructions that, when executed by one or more processors of a processing system, cause the processing system to: transmit to a user equipment (UE) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; receive a random access channel (RACH) preamble from the UE in one of the one or more ROs during the one or more time periods based on the indication; and perform RACH procedures with the UE based on the received RACH preamble.

[0017] Certain aspects may be implemented in a computer program product for wireless communication by a base station (BS) contained on a computer-readable storage medium. The computer-readable storage medium may include code for: transmitting to a user equipment (UE) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; receiving a random access channel (RACH) preamble from the UE in one of the one or more ROs during the one or more time periods based on the indication; and performing RACH procedures with the UE based on the received RACH preamble.

[0018] Other aspects include: means configured to perform the foregoing methods and those methods described herein; a non-transient computer-readable medium including instructions which, when executed by one or more processors of a processing system, cause the processing system to perform the foregoing methods and those methods described herein; a computer program product implemented on a computer-readable storage medium including code for performing the foregoing methods and those methods further described herein; and an apparatus including means for performing the foregoing methods and those methods further described herein.

[0019] For illustrative purposes, the following description and accompanying figures illustrate certain features. Brief description of the attached diagram

[0021] The accompanying drawings depict certain features of the aspects described herein and should not be considered as limiting the scope of this disclosure.

[0022] Figure 1 It is a block diagram that conceptually explains an example wireless communication network.

[0023] Figure 2 It is a block diagram that conceptually explains various aspects of an example base station and user equipment.

[0024] Figure 3A , 3B 3C and 3D depict various example aspects of data structures used in wireless communication networks.

[0025] Figure 4A , 4B 4C and 4D explain different full-duplex use cases within wireless communication networks.

[0026] Figure 5 The scheduling of different types of random access channel opportunities was explained.

[0027] Figure 6 This is a flowchart illustrating an example operation of wireless communication performed by a base station.

[0028] Figure 7 This is a flowchart illustrating an example operation of wireless communication performed by user equipment.

[0029] Figure 8 This is a sample call flow diagram illustrating an example operation for wireless communication between user equipment and a base station.

[0030] Figure 9 An example wireless communication device configured to perform the methods disclosed herein is described.

[0031] Figure 10 An example wireless communication device configured to perform the methods disclosed herein is described.

[0032] For illustrative purposes, the following description and accompanying figures illustrate certain features.

[0033] Detailed description

[0034] This disclosure provides apparatus, methods, processing systems, and computer-readable media for indicating the overlap of downlink transmissions with one or more random access channel (RACH) timings. For example, a user equipment (UE) may execute a random access channel (RACH) procedure for various reasons, such as establishing an initial connection to the network, updating timing advance (TA), performing beam recovery procedures, etc. To initiate a RACH procedure, the UE may transmit a RACH preamble within a RACH timing (RO). RO is generally a predefined time period during which the UE may transmit the RACH preamble to the BS.

[0035] In current 5G New Radio (NR) systems, ROs cannot overlap with other downlink transmissions, which increases the latency associated with executing RACH procedures. These ROs are referred to as half-duplex (HD) ROs. However, to provide more flexibility to the UE and to help reduce latency associated with RACH procedures, the UE can use ROs that do not overlap with other downlink transmissions. These types of ROs are referred to as full-duplex (FD) ROs.

[0036] In some situations, the UE may choose between HD RO and FD RO for performing RACH procedures based on one or more criteria involving at least one of transmission latency or transmission reliability. For example, if the UE is near the center of a cell with good channel conditions, it may decide to use FD RO to perform RACH procedures to reduce the latency associated with those procedures. In other situations, if the UE is near the edge of a cell with poor channel conditions, it may instead decide to use HD RO to perform RACH procedures to increase the probability that RACH transmissions from the UE will be correctly received by the BS (e.g., because these RACH transmissions will not overlap with other DL transmissions during the HD RO).

[0037] Therefore, the techniques proposed in this paper provide the UE with the flexibility to choose between reliability (e.g., by using HD RO) or reduced latency (e.g., by using FD RO) when executing RACH procedures. Using FD RO to reduce latency can also lead to additional benefits such as reduced power consumption at the UE, better utilization of limited radio resources, increased data throughput, and so on.

[0038] Introduction to Wireless Communication Networks

[0039] Figure 1 An example of a wireless communication network 100 in which the aspects described herein can be implemented is depicted.

[0040] Typically, wireless communication network 100 includes base station (BS) 102, user equipment (UE) 104, evolved packet core (EPC) 160 and core network 190 (e.g., 5G core (5GC)), which interoperate to provide wireless communication services.

[0041] Base station 102 can provide UE 104 with access to EPC 160 and / or core network 190, and can perform one or more of the following functions: user data transmission, radio channel cryptography and decoding, integrity protection, header compression, mobility control functions (e.g., handover, dual connectivity), inter-cell interference coordination, connection establishment and release, load balancing, distribution of non-access stratum (NAS) messages, NAS node selection, synchronization, radio access network (RAN) sharing, multimedia broadcast multicast service (MBMS), subscriber and equipment tracking, RAN information management (RIM), paging, location, delivery of alarm messages, and other functions. In various contexts, a base station may include and / or be referred to as gNB, B-node, eNB, access point, base transceiver station, radio base station, radio transceiver, or transceiver function, or transmit / receive point (TRP).

[0042] Base station 102 communicates wirelessly with UE 104 via communication link 120. Each base station 102 can provide communication coverage for various geographical coverage areas 110 that may overlap in some cases. For example, a small cell 102' (e.g., a low-power base station) may have a coverage area 110' that overlaps with the coverage areas 110 of one or more macro cells (e.g., high-power base stations).

[0043] The communication link 120 between base station 102 and UE 104 may include uplink (UL) (also known as reverse link) transmission from UE 104 to BS 102 and / or downlink (DL) (also known as forward link) transmission from BS 102 to UE 104. In various aspects, the communication link 120 may use multiple-input multiple-output (MIMO) antenna technologies, including spatial multiplexing, beamforming, and / or transmit diversity.

[0044] Examples of UE 104 include cellular phones, smartphones, Session Initiation Protocol (SIP) phones, laptop devices, personal digital assistants (PDAs), satellite radios, GPS devices, multimedia devices, video devices, digital audio players, cameras, game consoles, tablet devices, smart devices, wearable devices, vehicles, electricity meters, air pumps, large or small kitchen appliances, healthcare devices, implants, sensors / actuators, displays, or other similar devices. Some UE 104 may be Internet of Things (IoT) devices (e.g., parking meters, air pumps, ovens, vehicles, heart monitors, or other IoT devices), always-on (AON) devices, or edge processing devices. UE 104 may also be more generally referred to as a station, mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, or client.

[0045] Wireless communication network 100 includes downlink (DL) transmission indication component 199, which can be configured to perform Figure 6 and / or Figure 8 The operation described herein, as well as other operations for indicating the overlap of downlink transmissions with one or more random access channel timings, are explained in the text. The wireless communication network 100 further includes a DL transmission indication component 198, which can be configured to perform... Figure 7-8 The operations explained in the text, as well as other operations described herein for indicating the overlap of downlink transmissions with one or more random access channel timings.

[0046] Figure 2 Various aspects of the example base station (BS) 102 and user equipment (UE) 104 are described.

[0047] Generally, BS102 includes various processors (e.g., 220, 230, 238, and 240), antennas 234a-t (collectively referred to as 234), transceivers 232a-t (collectively referred to as 232) including modulators and demodulators, and other aspects that enable the wireless transmission of data (e.g., data source 212) and the wireless reception of data (e.g., data trap 239). For example, BS102 can transmit and receive data between itself and UE 104.

[0048] BS102 includes a controller / processor 240 that can be configured to implement various functions related to wireless communication. In the depicted example, the controller / processor 240 includes components that can represent... Figure 1 The DL transmission indicator component 241 of the DL transmission indicator component 199. It is worth noting that although depicted as one aspect of the controller / processor 240, the DL transmission indicator component 241 may be additionally or alternatively implemented in various other aspects of the BS102 in other implementations.

[0049] Generally, UE 104 includes various processors (e.g., 258, 264, 266 and 280), antennas 252a-r (collectively referred to as 252), transceivers 254a-r (collectively referred to as 254) including modulators and demodulators, and other aspects that enable wireless transmission of data (e.g., data source 262) and wireless reception of data (e.g., data trap 260).

[0050] UE 104 includes a controller / processor 280 that can be configured to implement various functions related to wireless communication. In the depicted example, the controller / processor 280 includes components that can represent... Figure 1 The DL transmission indication component 198 includes the DL transmission indication component 281. It is worth noting that although depicted as one aspect of the controller / processor 280, the DL transmission indication component 281 may be additionally or alternatively implemented in various other aspects of the UE 104 in other implementations.

[0051] Figure 3A , 3B 3C and 3D depict the use of wireless communication networks (such as...) Figure 1 The data structure of the wireless communication network 100) covers various aspects. Specifically, Figure 3A This is an illustration 300 showing an example of the first subframe within a 5G (e.g., 5G NR) frame structure. Figure 3B Figure 330 is an example illustrating the DL channel within a 5G subframe. Figure 3C Figure 350 is an example illustrating the second subframe within the 5G frame structure, and Figure 3D Figure 380 is an example illustrating the UL channel within a 5G subframe.

[0052] Information about this disclosure will be provided later in this publication. Figure 1 , Figure 2 and Figure 3A , 3B Further discussion on 3C and 3D.

[0053] Introduction to mmWave Wireless Communication

[0054] In wireless communication, the electromagnetic spectrum is typically subdivided into various categories, bands, channels, or other characteristics. Subdivisions are usually provided based on wavelength and frequency, where frequency may also be referred to as carrier, subcarrier, channel, frequency modulation, or subband.

[0055] In 5G, two initial operating frequency bands have been designated as the frequency range specifications FR1 (410MHz-7.125GHz) and FR2 (24.25GHz-52.6GHz). The frequencies between FR1 and FR2 are generally referred to as the mid-band frequencies. Although a portion of FR1 is greater than 6GHz, in various documents and articles, FR1 is often (interchangeably) referred to as the "sub-6GHz band." Similar naming issues sometimes arise regarding FR2. Although different from the Extremely High Frequency (EHF) band (30GHz-300GHz) designated as "millimeter wave" ("mmW" or "mmWave") by the International Telecommunication Union (ITU), FR2 is often (interchangeably) referred to as the "millimeter wave" band in various documents and articles because the wavelengths at these frequencies are between 1mm and 10mm. Radio waves in this band can be referred to as millimeter waves. Near-mmWave extends down to frequencies of 3GHz with wavelengths of 100mm. The Ultra High Frequency (SHF) band extends between 3GHz and 30GHz, and it is also referred to as centimeter waves.

[0056] In light of the foregoing, unless otherwise stated, it should be understood that, as used herein, the term "sub-6GHz" and the like can broadly refer to frequencies less than 6GHz, within FR1, or including intermediate frequency band frequencies. Furthermore, unless otherwise stated, it should be understood that, as used herein, the term "millimeter wave" and the like can broadly refer to frequencies that can include intermediate frequency band frequencies, within FR2, or within the EHF band.

[0057] Communication using mmWave / near mmWave radio frequency bands (e.g., 3 GHz–300 GHz) can have higher path loss and shorter range compared to lower frequency communication. Accordingly, in Figure 1In this configuration, the mmWave BS180 can utilize beamforming 182 with the UE 104 to improve path loss and range. To this end, the BS180 and the UE 104 may each include multiple antennas, such as antenna elements, antenna panels, and / or antenna arrays, to facilitate beamforming.

[0058] In some scenarios, BS180 may transmit beamformed signals to UE 104 in one or more transmit directions 182'. UE 104 may receive beamformed signals from BS180 in one or more receive directions 182'. UE 104 may also transmit beamformed signals to base station 180 in one or more transmit directions 182'. Base station 180 may receive beamformed signals from UE 104 in one or more receive directions 182'. Base station 180 and UE 104 may then perform beamforming to determine the optimal receive and transmit directions for each of BS180 and UE 104. It is worth noting that the transmit and receive directions of BS180 may be the same or different. Similarly, the transmit and receive directions of UE 104 may be the same or different.

[0059] Wireless devices (such as BS, UE, and integrated backhaul and access network (IAB network) nodes supporting mobile telecommunications (MT) functions) can be capable of transmit / receive (Tx / Rx) beam mapping. Beam mapping involves receive (Rx) beams and transmit (Tx) beams, which are spatial beams used to receive and transmit signals formed by the wireless device through beamforming.

[0060] Beam correspondence can mean that a Tx beam can be used to determine a corresponding Rx beam, or an Rx beam can be used to determine a corresponding Tx beam for wireless communication. As discussed, the UE and BS can each be capable of beamforming for both receiving and transmitting wireless signals. Therefore, each of the UE and BS can directionally receive signals on one or more corresponding Rx beams (referred to as UE Rx beams for the UE and BS Rx beams for the BS), and each of the UE and BS can directionally transmit signals on one or more corresponding Tx beams (referred to as UE Tx beams for the UE and Tx beams for the BS). In some respects, the beam correspondence discussed herein corresponds to the beam correspondence defined in 3GPP TR 38.802.

[0061] For example, a BS is capable of Tx / Rx beam mapping if at least one of the following conditions is met: 1) the BS is capable of determining the BS Rx beam for uplink reception based on downlink measurements of one or more BS Tx beams by the UE; or 2) the BS is capable of determining the BSTx beam for downlink transmission based on uplink measurements of one or more BS Rx beams by the BS.

[0062] In addition, the UE is able to perform Tx / Rx beam mapping if at least one of the following conditions is met: 1) the UE is able to determine the UE Tx beam for uplink transmission based on downlink measurements of one or more UE Rx beams by the UE; or 2) the UE is able to determine the UE Rx beam for downlink reception based on uplink measurements of one or more UE Tx beams by the BS.

[0063] In some respects, the UE can report its beamforming capabilities to the BS upon receiving an explicit request from the BS, as described in 3GPP TS 38.331. The BS can then select different beam management methods based on the capabilities reported by the UE.

[0064] Introduction to Multi-Antenna Panel Communication

[0065] In some systems (such as) Figure 1 In a wireless communication network 100, the UE and BS may be able to use multiple antennas, beams, and / or antenna panels (e.g., antenna element arrays) to transmit or receive data. Antenna panels may include a set of transceiver units (TXRUs) capable of generating analog beams. In some cases, when using a dual-polarized array, one beam may correspond to two antenna ports. In some cases, the same set or different sets of antenna panels may be used for both DL reception and UL transmission. For example, in some cases, the same set of antenna panels may be used for both DL reception and UL transmission, while in other cases, different sets of antenna panels may be used for DL ​​reception compared to UL transmission.

[0066] Additionally, antenna panels can be associated with the same or different numbers of antenna ports, beam counts, and / or effective isotropic radiated power (EIRP). In some cases, while different antenna panels may share the same number of beams, there may not be a beam correspondence across different antenna panels. Furthermore, in some cases, each antenna panel can be associated with the same or independent operating parameters, such as power control (PC) parameters, fast Fourier transform timing windows, timing advance (TA) parameters, etc. Additionally, each antenna panel of the UE can be associated with a specific panel identifier (ID) or antenna panel group ID. In some cases, the antenna panel ID or antenna panel group ID may include one or more of the following: beam group ID, Transmission Configuration Indicator (TCI) state pool ID, Probe Reference Signal (SRS) resource group ID, Control Resource Set (CORESET) pool ID, or closed-loop power control index.

[0067] In some scenarios, the ability to perform transmissions using multiple panels can be particularly useful for higher frequency transmissions (such as the millimeter-wave transmissions mentioned above). In some cases, transmissions associated with the UE can be received from or transmitted to the serving BS or Transmitter Receiving Point (TRP) via the Uu interface. Generally, using multiple antenna panels for transmission can allow increased throughput (e.g., by using multiple antenna panels to simultaneously or concurrently transmit / receive data to / from the BS) and / or increased reliability (e.g., by using multiple antenna panels to transmit / receive the same information). Such transmissions are referred to as multi-panel transmissions.

[0068] Various aspects related to downlink transmission indication for RACH timing

[0069] As described above, in some scenarios, wireless communication devices (such as UEs and BSs) can use multiple antenna panels for communication. In some cases, multiple antenna panels can be used for half-duplex (HD) communication, such as in current 5G New Radio (NR) communication systems, where downlink (DL) and uplink (UL) transmissions are not transmitted simultaneously (e.g., in different time resources). In 5G NR Releases 15 (R-15) and 16 (R-16), HD communication is considered baseline behavior. In other scenarios, using multiple antenna panels allows for full-duplex (FD) communication, whereby uplink (UL) and downlink (DL) transmissions can be performed simultaneously (e.g., in the same time resources). For example, in some scenarios, a UE's UL transmission can be performed on one panel, while DL reception can be performed simultaneously on another panel of the same UE. Similarly, at the BS, the BS's DL transmission can be performed on one antenna panel, while UL reception can be performed on another antenna panel.

[0070] FD capability can be conditional on beam separation (e.g., frequency separation or spatial separation) and may still suffer from some self-interference between UL and DL (e.g., UL transmission directly interfering with DL reception) and clutter echoes (e.g., where UL transmission echoes affect UL transmission and / or DL ​​reception). However, despite the potential for some interference, FD capability offers reduced transmission and reception latency (e.g., the possibility of receiving DL transmissions in UL-only slots), improved spectral efficiency (e.g., per cell and / or per UE), and more efficient resource utilization.

[0071] Figure 4A , 4B 4C and 4D explain different FD use cases within a wireless communication network (such as wireless communication network 100). For example, Figure 4A The first FD use case describes a transmission between a UE 402 and two base stations (or multiple transmit / receive points (mTRPs)) BS 404 and BS 406. In some cases, UE 402 can represent Figure 1 UE 104, and BS 404, 406 can represent Figure 1 BS102. As shown in the figure, UE 402 can simultaneously receive DL transmission 408 from BS 404 and transmit UL transmission 410 to BS 406. In some cases, DL transmission 408 and UL transmission 410 can be performed using different antenna panels to facilitate simultaneous transmission and reception.

[0072] exist Figure 4B The example describes a second FD use case involving two different UEs and one BS. As explained, UE 402 can receive DL transmission 408 from BS 404, while another UE 412 can simultaneously transmit UL transmission 410 to BS 404. Therefore, in this example, BS 404 is performing simultaneous uplink and downlink communication.

[0073] exist Figure 4C The following describes a third FD use case involving a BS and a UE. As explained, UE 402 can receive DL transmission 408 from BS 404 and can simultaneously transmit UL transmission 410 to BS 404. As mentioned above, such simultaneous reception / transmission by UE 402 can be facilitated by different antenna panels.

[0074] Table 1 below illustrates various example scenarios in which each FD can be used as a use case.

[0075] Table 1

[0076]

[0077] As shown, if FD capability is disabled at both the base station and the UE, baseline R-15 / 165G behavior (e.g., HD communication) can be used. If FD capability is disabled at the BS but enabled at the UE, the UE can... Figure 4A The first example FD use case shown operates where the UE can use two different antenna panels to communicate with different TRPs simultaneously (e.g., simultaneous UL and DL transmissions). If FD is enabled at the BS but disabled at the UE (e.g., the UE does not have FD capability), the UE can operate according to... Figure 4B The second example FD use case shown operates where the BS can use two different antenna panels to communicate with two different UEs simultaneously (e.g., simultaneous UL and DL transmissions). Finally, if FD is enabled at both the BS and the UE, the BS and UE can operate according to... Figure 4C The third example FD use case shown operates where the BS and UE can communicate with each other simultaneously on UL and DL, with each of the BS and UE using a different antenna panel for UL and DL transmission.

[0078] FD communication can be facilitated by using Frequency Division Multiplexing (FDM) or Space Division Multiplexing (SDM). In FDM, simultaneous UL and DL transmissions can be transmitted on the same time resources, but on separate frequency bands separated by a guard band. In SDM, simultaneous UL and DL transmissions can be transmitted on the same time and frequency resources, but are spatially separated into different directional transmit beams. This type of FD communication contrasts with HD communication, which uses Time Division Multiplexing (TDM), where UL and DL transmissions are scheduled on the same or different frequency resources, but different time resources.

[0079] In current 5G NR communication systems, the UE specifically uses HD mode to perform the Random Access Channel (RACH) procedure with the BS. Generally, the RACH procedure can be used by the UE for one or more purposes, such as establishing an initial connection with the network, updating timing advance (TA) in connected mode, performing beam recovery procedures in connected mode, and so on.

[0080] To initiate the RACH procedure, the UE can select the RACH timing (RO) from which to transmit the RACH preamble to the BS. The RACH timing is a region specified in the time and frequency domains that is available for the transmission of the RACH preamble. In response to the RACH preamble, the UE can receive a Random Access Response (RAR) from the network. The RAR indicates which preamble it is associated with, the TA to be used by the UE, scheduling permission for sending message 3, and the Temporary Cell Radio Network Temporary Identifier (TC-RNTI). Thereafter, the UE can transmit and receive additional messages (e.g., messages 3 and 4, respectively) to resolve any conflicts between two or more UEs attempting to access the network with the same preamble in the same physical PRACH resources. Once the Random Access (RA) procedure is complete, the UE transitions to a connected state.

[0081] As mentioned above, in current 5G NR systems, HD mode is specifically used for RACH procedures. For example, in HD mode, the time and frequency resources for RACH timing cannot overlap with other DL transmissions (such as Synchronization Signal Block (SSB), Physical Downlink Control Channel (PDCCH) transmission, Physical Downlink Shared Channel (PDSCH) transmission, and Channel State Information Reference Signal (CSI-RS)). In other words, when transmitting the RACH preamble within a RO in a current 5G NR system, that RO must not contain any other DL transmissions. Therefore, such ROs can be called HD ROs (e.g., ROs that cannot overlap with other downlink transmissions in time). In some cases, this HD mode requirement can lead to wasted time resources and longer access times, as the UE may have to wait a relatively long time to transmit the RACH preamble within an RO that does not overlap with other DL transmissions.

[0082] However, to enable more efficient use of time and frequency resources and to reduce latency associated with RACH procedures, FD mode can be used in some cases. When RACH procedures are executed in FD mode, the RO may overlap temporally with other DL transmissions mentioned above. Therefore, such ROs that overlap temporally with other DL transmissions can be referred to as FDROs.

[0083] The methods for scheduling ROs on time and frequency resources can differ, depending on whether the RO is an HD RO or a FD RO, such as in... Figure 5 The explanation is as follows. For example, Figure 5 The scheduling of three different ROs, namely HD RO 502, FD RO 504 and FD RO506, is explained.

[0084] exist Figure 5In this context, due to the limitation that HD RO cannot overlap with other DL transmissions in time, HD RO 502 can be time-division multiplexed with other DL transmissions so that HD RO 502 and other DL transmissions can share the same frequency resources, but share them at different times (e.g., time resources).

[0085] In contrast, FD RO may not have the same restrictions regarding overlapping DL transmissions. Instead, FD RO can be transmitted simultaneously with other DL transmissions. In some cases, to allow this simultaneous transmission, FD RO can be frequency-division multiplexed or space-division multiplexed with other DL transmissions. In the case of frequency division multiplexing, FD RO can be transmitted in a first frequency band and other DL transmissions can be transmitted in a second frequency band. For example, as shown, FD RO 504 and other DL transmissions 508 (e.g., SSB) can be transmitted on the same time resources (e.g., simultaneously in time) but in different frequency bands. That is, FD RO 504 can be transmitted in the first frequency band, while other DL transmissions can be transmitted in the second frequency band. As shown, to reduce the probability of interference between the first and second frequency bands, the first and second frequency bands can be separated by a guard band 510.

[0086] In spatial division multiplexing (SDM) scenarios, FD ROs can transmit on the same time and frequency resources, but are spatially separated from other DL transmissions using one or more focused transmit beams. For example, as shown, FD RO 506 transmits on the same time and frequency resources as other DL transmissions (e.g., SSBs). In this scenario, transmission on the same time and frequency resources can be facilitated by different transmit beams. For example, in some cases, FD RO 506 can transmit on a first transmit beam while other DL transmissions can transmit on a second transmit beam.

[0087] As mentioned above, FD RO enables more efficient use of time and frequency resources and reduces latency associated with RACH procedures. However, there may be situations where the UE might prefer to use HD RO instead. For example, while FD RO utilizes time and frequency resources more efficiently and reduces latency, it may suffer from interference with other DL transmissions, which can reduce transmission reliability. In contrast, because HD RO does not overlap with other DL transmissions, the transmission reliability on these HD ROs can be better than that on FD RO. In some cases, it can be beneficial for the UE to be able to choose between HD RO and FD RO depending on the specific circumstances.

[0088] For example, if the UE is near the center of a cell with good channel conditions, it may decide to use FDRO to perform the RACH procedure to reduce the latency associated with that RACH procedure. In other cases, if the UE is near the edge of a cell with poor channel conditions, it may instead decide to use HD RO to perform the RACH procedure to increase the probability that RACH transmissions from the UE will be correctly received by the BS (e.g., because these RACH transmissions will not overlap with other DL transmissions during the HD RO).

[0089] However, because other DL transmissions are typically delivered to another device in the network, the UE may not be aware of whether a particular RO overlaps with other DL transmissions from that other device in the network. Therefore, aspects of this disclosure provide techniques for the BS to provide the UE with an indication of whether one or more ROs will overlap with DL transmissions in one or more time periods. In some cases, based on this indication, the UE may select one of the one or more ROs based on one or more criteria involving at least one of transmission latency or transmission reliability, transmit a RACH preamble to the BS in that one or more ROs during the one or more time periods, and perform a RACH procedure with the BS based on the received RACH preamble.

[0090] Example method for downlink transmission indication for RACH timing

[0091] Figure 6 This is a flowchart illustrating an example operation 600 for wireless communication. Operation 600 can be, for example, performed by a BS (e.g., such as...). Figure 1 The BS102 in the wireless communication network 100 performs signaling to provide indications of the overlap of downlink transmission timing with one or more random access channels. Operation 600 can be implemented in one or more processors (e.g., Figure 2 The software components executed and running on the controller / processor 240. Furthermore, the signal transmission and reception performed by the BS in operation 600 may be, for example, by one or more antennas (e.g., Figure 2 This can be achieved via antenna 234. In some respects, signal transmission and / or reception by the BS can be achieved by obtaining and / or outputting signals via a bus interface of one or more processors (e.g., controller / processor 240).

[0092] Operation 600 begins at 610, transmitting signaling to the User Equipment (UE) including an indication of whether one or more Random Access Channel (RO) times will overlap with downlink transmissions in one or more time periods.

[0093] In box 620, the BS receives the random access channel (RACH) preamble from the UE in one of the one or more ROs during the one or more time periods based on the indication.

[0094] In box 630, the BS performs the RACH procedure with the UE based on the received RACH preamble.

[0095] Figure 6 Operation 600 shown is merely an example, and other methods or operations with more or fewer steps are possible according to this disclosure.

[0096] Figure 7 This is a flowchart illustrating example operation 700 for wireless communication according to certain aspects of this disclosure. Operation 700 can be performed, for example, by a UE (e.g., such as...). Figure 1 The UE 104 in the wireless communication network 100 performs signaling to receive overlapping timings of downlink transmissions with one or more random access channels. Operation 700 may be complementary to operation 600 performed by the BS. Operation 700 may be implemented in one or more processors (e.g., Figure 2 The software components executed and running on the controller / processor 280. Furthermore, the signal transmission and reception performed by the UE in operation 700 may be, for example, by one or more antennas (e.g., Figure 2 This can be achieved via antenna 252. In some respects, signal transmission and / or reception by the UE can be achieved by obtaining and / or outputting signals via a bus interface of one or more processors (e.g., controller / processor 280).

[0097] Operation 700 begins in box 710 by receiving signaling from the base station (BS) including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods.

[0098] In block 720, the UE transmits a random access channel (RACH) preamble to the BS in one of the one or more ROs during the one or more time periods based on the indication. In some cases, the UE may select the RO among the one or more ROs based on one or more criteria involving at least one of transmission latency or transmission reliability.

[0099] In box 730, the UE performs the RACH procedure with the BS based on the transmitted RACH preamble.

[0100] Figure 7 Operation 700 shown is merely an example, and other methods or operations with more or fewer steps are possible according to this disclosure.

[0101] As described above, aspects of this disclosure relate to techniques for providing a UE with signaling indicating whether one or more ROs will overlap with DL transmissions in one or more time periods. In some cases, ROs may be used by the UE to perform RACH procedures for various reasons.

[0102] In some scenarios, the UE can use the RO to perform RACH procedures for initial access, such as establishing an initial connection with the BS. In other scenarios, the UE can use the RO to perform RACH procedures in connected mode, for example, to update timing advance (TA) parameters or for beam fault recovery. Because the UE has not yet established a connection with the BS (e.g., will receive dedicated signaling from it) when performing RACH for initial access, the indication of whether the RO will overlap with DL transmissions can be signaled in different ways.

[0103] Downlink transmission indication for initial access

[0104] For example, for initial access (e.g., it can be applied to in...) Figure 4B In the scenario described above, the BS can transmit signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, in the Residual Minimal System Information (RMSI) broadcast signal. In some cases, the downlink transmissions associated with initial access can be downlink transmissions for different UEs in the network.

[0105] RMSI signals typically include system information (such as System Information Block 1 (SIB1)), which includes cell selection information, Public Land Mobile Network (PLMN) information, Tracking Area Code (TAC) information, Cell Identity (ID), Radio Access Network (RAN) Notification information, System Information (SI) scheduling information for other System Information (OSI) (e.g., SIB2-SIB9), and serving cell information. Furthermore, RMSI signals are transmitted at a specific periodicity (e.g., every 160 ms). Therefore, signaling including indications of whether one or more ROs will overlap with DL transmissions may include time periods for transmitting and receiving RMSI broadcast signals corresponding to the RMSI periodicity within one or more time periods.

[0106] In some cases, signaling including an indication of whether one or more ROs will overlap with downlink transmissions can be transmitted in a time period preceding the one or more time periods. In such cases, the signaling including an indication of whether one or more ROs will overlap with downlink transmissions can be transmitted during the first RMSI monitoring period (e.g., during the first RMSI signal transmitted in the first time period for transmitting and receiving RMSI) with respect to the RO used for initial access, and can be applied to ROs that appear after the first time period for transmitting and receiving RMSI broadcast signals.

[0107] In some cases, signaling including an indication of whether one or more ROs will overlap with downlink transmissions can be explicitly or implicitly indicated in the RMSI broadcast signal and can be applied to different numbers of ROs. For example, in some cases, the RMSI broadcast signal may include an explicit indication for each of the one or more ROs whether that one or more RO will overlap with downlink transmissions in the next time period. In other words, in some cases, for each corresponding RO of one or more ROs in one or more time periods, the indication includes a separate indication of whether that corresponding RO will overlap with downlink transmissions in that one or more time periods.

[0108] In some cases, an indication of whether one or more ROs will overlap with downlink transmissions can be applied to all ROs within that one or more time periods (e.g., ROs that occur after the time period in which the indication is received). In other words, the indication of whether one or more ROs will overlap with downlink transmissions is the same for all ROs within that one or more time periods.

[0109] In some cases, an indication of whether one or more Remote Routers (ROs) will overlap with downlink transmissions can be provided as a bit map. In some cases, the bit map may include a set of bits, and each bit in the set may correspond to a different RO among the one or more ROs and indicate whether that different RO will overlap with a downlink transmission. For example, a bit value of zero in the bit map may indicate that the corresponding RO is an HD RO (e.g., the RO does not overlap with a downlink transmission), while a bit value of one in the bit map may indicate that the corresponding RO is an FD RO (e.g., the RO overlaps with a downlink transmission), and vice versa.

[0110] In other cases, an indication of whether one or more ROs will overlap with downlink transmissions can be provided implicitly. For example, this indication can be implicitly provided via one or more Reference Signal Received Power (RSRP) thresholds in the RMSI broadcast signal. In some cases, each RO type (e.g., FD RO and HD RO) can be associated with a different RSRP threshold. Therefore, by indicating the RSRP threshold associated with a particular RO in the RMSI broadcast signal, the BS can implicitly indicate to the UE whether the RO associated with that RSRP threshold will overlap with downlink transmissions.

[0111] As an example, in some scenarios, a first RSRP threshold may indicate that a first corresponding RO among one or more ROs will overlap with downlink transmissions in one or more time periods, while a second RSRP threshold may indicate that a second corresponding RO among the one or more ROs will overlap with downlink transmissions in one or more time periods. In other words, if the UE receives a first threshold associated with a first corresponding RO, the UE may implicitly determine that the first corresponding RO is an FD RO (e.g., an RO overlapping with downlink transmissions), and if the UE receives a second threshold associated with a second corresponding RO, the UE may implicitly determine that the second corresponding RO is an HD RO (e.g., an RO not overlapping with downlink transmissions).

[0112] In some cases, one or more RSRP thresholds may be associated with a different number of ROs. For example, one or more RSRP thresholds may include multiple RSRP thresholds, and each different RSRP threshold may correspond to a different corresponding RO in one or more ROs. In other words, one or more RSRP thresholds may indicate on a per-RO basis. In other cases, one or more RSRP thresholds may include a first RSRP threshold applied to a subset of ROs in one or more ROs. In still other cases, one or more RSRP thresholds may include a second RSRP threshold applied to all ROs in one or more ROs.

[0113] Downlink transmission indication for connected mode RACH

[0114] As described above, the UE can use RO in connected mode to perform RACH procedures, for example, to update timing advance (TA) parameters or for beam fault recovery. The connected mode RACH can be performed differently compared to the RACH used for initial access. Figure 6 The transmission in box 610 includes signaling indicating whether one or more ROs will overlap with one or more downlink transmissions.

[0115] For example, in some cases, for the connectivity mode RACH procedure, Figure 6The transmission in block 610, including signaling indicating whether one or more ROs will overlap with downlink transmissions, may include explicitly transmitted signaling via RRC signaling. In some cases, downlink transmissions may include downlink transmissions for different UEs in the network. Furthermore, in some cases, the signaling including the indication of overlap may include a specific time window associated with the RRC signaling during one or more time periods. The specific periodicity associated with this time window may be configured by the BS. Additionally, as with initial access, the indication of overlap may be transmitted within a first RRC-related time window and may be applied to ROs in a second RRC-related time window that occurs after the first RRC-related time window.

[0116] Additionally, the overlap indication provided in the RRC signaling can be applied to different numbers of ROs. For example, the overlap indication can be provided on a per-RO basis. In other words, for each RO in one or more ROs within one or more time periods, the indication includes a separate indication of whether that RO will overlap with downlink transmissions in that one or more time periods. In other cases, the overlap indication can be applied to a subset of ROs in one or more ROs. In other words, the indication of whether one or more ROs will overlap with downlink transmissions is applied to a subset of ROs in one or more ROs. Furthermore, in other cases, the overlap indication can be applied to all ROs in one or more ROs. In other words, the indication of whether one or more ROs will overlap with downlink transmissions is the same for all ROs in one or more ROs within that one or more time periods.

[0117] In some cases, an indication of whether one or more ROs will overlap with downlink transmissions can be implicitly provided in the RRC signaling. For example, for the connectivity mode RACH protocol, Figure 6The transmission in block 610 including signaling indicating whether one or more ROs will overlap with downlink transmissions may include signaling including an indication of whether one or more ROs will overlap with downlink transmissions implicitly transmitted via RRC periodic DL scheduling information. In some cases, such periodic DL scheduling information may include a semi-persistent scheduling (SPS) configuration containing resources semi-persistently scheduled together with downlink transmissions. In some cases, the semi-persistently scheduled downlink transmission may be a downlink transmission associated with a different UE in the network or may be associated with that UE. In other words, the indication of whether one or more ROs will overlap with downlink transmissions may include SPS information indicating one or more downlink SPS scheduling opportunities that overlap with the one or more ROs in one or more time periods. In such cases, the UE may implicitly determine that the one or more ROs overlap with downlink transmissions in SPS scheduling opportunities because the SPS information indicates that such SPS scheduling opportunities are reserved for downlink transmissions for that UE.

[0118] In other scenarios, an indication of whether one or more ROs will overlap with downlink transmissions can be explicitly provided in the Downlink Control Information (DCI) or Media Access Control (MAC-CE) element, or implicitly provided in the DCI / MAC-CE scheduling information. In such cases, the signaling including the indication of overlap may include one or more time slots (e.g., scheduled by the DCI / MAC-CE) during one or more time periods. Furthermore, as with initial access, the indication of overlap can be transmitted in the first time slot and can be applied to ROs in a second time slot that occurs after the first time slot.

[0119] For example, Figure 6 The transmission in block 610, including signaling indicating whether one or more ROs will overlap with downlink transmissions, may include explicitly transmitted signaling via DCI or MAC-CE including an indication of whether one or more ROs will overlap with downlink transmissions. In such cases, downlink transmissions may include downlink transmissions associated with different UEs in the network. Furthermore, the indication of overlap in DCI and / or MAC-CE may be provided for a different number of ROs. For example, the indication of overlap may be provided on a per-RO basis. In other words, for each of one or more ROs in one or more time periods, the indication includes a separate indication of whether that RO will overlap with a downlink transmission in that one or more time periods (e.g., one or more time slots).

[0120] In other cases, the indication regarding overlap may apply to a subset of ROs within one or more ROs. In other words, the indication of whether one or more ROs will overlap with downlink transmissions applies to a subset of ROs within one or more ROs in that one or more time periods (e.g., one or more time slots). Furthermore, in other cases, the indication regarding overlap may apply to all ROs within one or more ROs. In other words, the indication of whether one or more ROs will overlap with downlink transmissions is the same for all ROs within one or more ROs in that one or more time periods (e.g., one or more time slots).

[0121] In some cases, as described above, an indication of whether one or more ROs will overlap with downlink transmissions can be implicitly provided in the DCI and / or MAC-CE scheduling information. For example, Figure 6 The transmission in block 610 that includes signaling indicating whether one or more ROs will overlap with downlink transmissions may include signaling implicitly transmitted via DCI or MAC-CE that includes an indication whether one or more ROs will overlap with downlink transmissions. In such cases, the implicit indication of whether one or more ROs will overlap with downlink transmissions may include scheduling information from one or more of the DCI or MAC-CE indicating the scheduling of downlink transmissions in one or more time periods. In some cases, the scheduling information may include dynamic or semi-persistent DL scheduling configurations (e.g., indicating that downlink transmissions overlap with some ROs in time). In other words, the scheduling information may inform the UE to schedule downlink transmissions for that UE (or from other UEs) in a specific time slot. The UE can then implicitly determine from its own downlink transmission scheduling that if an RO is included in the specific time slot where these downlink transmissions are located, then that RO will overlap with those downlink transmissions.

[0122] Example information flow between base station and user equipment used to indicate the overlap between downlink transmission and RO.

[0123] Figure 8 It is an explanation by UE (e.g., such as Figure 1 In the wireless communication network 100, UE 104 and BS (e.g., such as Figure 1 An example call flow diagram of the operation performed by BS102 in wireless communication network 100 for providing / acquiring signaling indicating the overlap of downlink transmission timing with one or more random access channels.

[0124] For example, in box 802, BS102 transmits signaling receivable by UE 104, which includes an indication of whether one or more ROs will overlap with downlink transmissions in one or more time periods. In some cases, the indication of whether one or more ROs will overlap with downlink transmissions in one or more time periods can be provided in different ways using the techniques described above. For example, in some cases, the indication can be provided in the RMSI broadcast signal for use in the initial access RACH procedure. In other cases, for the connectivity mode RACH procedure, the indication can be provided explicitly in the RRC signaling, implicitly in the periodic RRC scheduling information, explicitly in the DCI / MAC-CE signaling, or implicitly in the scheduling information included in the DCI / MAC-CE signaling.

[0125] In block 804, UE 104 selects the RO (Route) from the one or more ROs to transmit the RACH preamble based on indications regarding overlap. In some cases, UE 104 may select the RO based on one or more criteria involving at least one of transmission latency or transmission reliability. For example, if UE 104 is near the center of a cell with good channel conditions, UE 104 may decide to select an FD RO that overlaps with downlink transmissions to reduce latency associated with the RACH procedure. In other cases, if UE 104 is near the edge of a cell with poor channel conditions, UE 104 may instead decide to select an HD RO to increase the probability that RACH transmissions from UE 104 will be correctly received by BS 102 (e.g., because these RACH transmissions will not overlap with other DL transmissions during the HD RO).

[0126] Subsequently, in block 806, UE 104 transmits a RACH preamble that can be received by BS 102 in one or more ROs during the one or more time periods. In block 808, BS 102 and UE 104 may execute RACH procedures on each other. In some cases, as described above, RACH procedures may be executed to establish an initial connection with BS 102, update timing advance, for beam fault recovery, etc. As described above, executing RACH procedures may include the transmission / reception of a Random Access Response (RAR) message and the transmission of additional messages (e.g., messages 3 and 4) to resolve any contention in the RACH procedure.

[0127] Example wireless communication device

[0128] Figure 9 The description includes operations that can be operated for, configured for, or adapted to perform the techniques disclosed herein (such as referencing...). Figure 6 and / or Figure 8 Example communication device 900 (depicting and describing the operation) includes various components. In some examples, communication device 900 may be BS102, for example, referencing Figure 1 and Figure 2 The BS102 described.

[0129] The communication device 900 includes a processing system 902 coupled to a transceiver 908 (e.g., a transmitter and / or receiver). The transceiver 908 is configured to transmit (or send) and receive signals (such as the various signals described herein) for the communication device 900 via an antenna 910. The processing system 902 may be configured to perform processing functions for the communication device 900, including processing signals received and / or to be transmitted by the communication device 900.

[0130] Processing system 902 includes one or more processors 920 coupled to computer-readable medium / memory 930 via bus 906. In some aspects, computer-readable medium / memory 930 is configured to store instructions (e.g., computer-executable code) that, when executed by the one or more processors 920, cause the one or more processors 920 to perform. Figure 6 and / or Figure 8 The operations described herein or other operations used to perform the various techniques discussed herein for providing signaling indicating the overlap of downlink transmissions with one or more random access channels.

[0131] In the illustrated example, the computer-readable medium / memory 930 stores code 931 for transmission, code 932 for reception, and code 933 for execution.

[0132] In some cases, the code 931 used for transmission may include code for transmitting to the user equipment (UE) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods.

[0133] In some cases, the code 932 for receiving may include code for receiving a random access channel (RACH) preamble from the UE in one of the one or more ROs during the one or more time periods based on the indication.

[0134] In some cases, the code 933 used for execution may include code for performing RACH procedures with the UE based on the received RACH preamble.

[0135] In some cases, the code 931 used for transmission may include code for transmitting signaling in the Residual Minimal System Information (RMSI) broadcast signal that includes an indication of whether one or more ROs will overlap with downlink transmissions.

[0136] In some cases, the code 931 used for transmission may include code for explicitly transmitting signaling via RRC signaling, including an indication of whether one or more ROs will overlap with downlink transmissions.

[0137] In some cases, the code 931 used for transmission may include code for implicitly transmitting signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, via radio resource control (RRC) periodic DL scheduling information.

[0138] In some cases, the code 931 used for transmission may include code for explicitly transmitting signaling, via downlink control information (DCI) or media access control element (MAC-CE), including an indication of whether one or more ROs will overlap with downlink transmissions.

[0139] In some cases, the code 931 used for transmission may include code for implicitly transmitting signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, via downlink control information (DCI) or media access control element (MAC-CE).

[0140] In some cases, the code 931 used for transmission may include code for transmitting signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, during a time period preceding the one or more time periods.

[0141] In the depicted example, one or more processors 920 include circuitry configured to implement code stored in computer-readable medium / memory 930, including circuitry 921 for transmission, circuitry 922 for reception, and circuitry 923 for execution.

[0142] In some cases, the circuitry 921 for transmission may include a circuitry for transmitting signaling to a user equipment (UE) including an indication of whether one or more random access channel opportunities (ROs) will overlap with downlink transmissions in one or more time periods.

[0143] In some cases, the circuitry 922 for transmission may include a circuitry for receiving a random access channel (RACH) preamble from the UE in one of the one or more ROs during the one or more time periods based on the indication.

[0144] In some cases, the circuitry 923 used for transmission may include a circuitry for performing RACH procedures with the UE based on the received RACH preamble.

[0145] In some cases, the circuitry 921 for transmission may include a circuitry for transmitting signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, in the Residual Minimal System Information (RMSI) broadcast signal.

[0146] In some cases, the circuitry 921 for transmission may include a circuitry for explicitly transmitting signaling via RRC signaling, including an indication of whether one or more ROs will overlap with downlink transmissions.

[0147] In some cases, the circuitry 921 used for transmission may include a circuitry for implicitly transmitting signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, via radio resource control (RRC) periodic DL scheduling information.

[0148] In some cases, the circuitry 921 used for transmission may include a circuitry for explicitly transmitting signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, via downlink control information (DCI) or media access control control element (MAC-CE).

[0149] In some cases, the circuitry 921 used for transmission may include circuitry for implicitly transmitting signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, via downlink control information (DCI) or media access control control element (MAC-CE).

[0150] In some cases, the circuitry 921 for transmission may include a circuitry for transmitting signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, during a time period preceding the one or more time periods.

[0151] Various components of the communication device 900 can provide for performing the methods described herein (including references) Figure 6 The apparatus of (and / or 8).

[0152] In some examples, the means for transmitting or sending (or the means for outputting for transmission) may include in Figure 2 The BS102 transceiver 232 and / or antennas 234 and / or... (as explained in the text) Figure 9 The transceiver 908 and antenna 910 of the communication equipment 900.

[0153] In some examples, the means for receiving (or the means for obtaining) may include in Figure 2 The base station transceiver 232 and / or antennas 234 and / or... (as explained in the text) Figure 9 The transceiver 908 and antenna 910 of the communication equipment 900 in the middle.

[0154] In some examples, the means of execution may include various processing system components, such as: Figure 9 One or more processors 1020, or Figure 2 The various aspects of the BS102 depicted include the receiver processor 238, the transmitter processor 220, the TX MIMO processor 230, and / or the controller / processor 240 (including the DL transmission indication component 241).

[0155] It is worth noting that, Figure 9 This is just one example, and many other examples and configurations of the communication device 900 are possible.

[0156] Figure 10 The description includes operations that can be operated for, configured for, or adapted to perform the techniques disclosed herein (such as referencing...). Figure 7 and 8 Example communication device 1000 (depicting and describing the operation) includes various components. In some examples, communication device 1000 may be UE 104, for example, referencing Figure 1 and Figure 2 The UE 104 described.

[0157] The communication device 1000 includes a processing system 1002 coupled to a transceiver 1008 (e.g., a transmitter and / or receiver). The transceiver 1008 is configured to transmit (or send) and receive signals (such as the various signals described herein) for the communication device 1000 via an antenna 1010. The processing system 1002 may be configured to perform processing functions for the communication device 1000, including processing signals received and / or to be transmitted by the communication device 1000.

[0158] Processing system 1002 includes one or more processors 1020 coupled to computer-readable medium / memory 1030 via bus 1006. In some aspects, computer-readable medium / memory 1030 is configured to store instructions (e.g., computer-executable code) that, when executed by the one or more processors 1020, cause the one or more processors 1020 to perform. Figure 7 and / or Figure 8 The operations described herein or other operations used to perform the various techniques discussed herein for receiving signaling indicating the overlap of downlink transmission timing with one or more random access channels.

[0159] In the illustrated example, computer-readable medium / memory 1030 stores code 1031 for receiving, code 1032 for transmitting, code 1033 for executing, and code 1034 for selecting.

[0160] In some cases, the code 1031 for receiving may include code for receiving from the base station (BS) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods.

[0161] In some cases, the code 1032 used for transmission may include code for transmitting a random access channel (RACH) preamble to the BS in one of the one or more ROs during the one or more time periods based on the instruction.

[0162] In some cases, the code 1033 for execution may include code for performing RACH procedures with the BS based on the transmitted RACH preamble.

[0163] In some cases, the code 1031 for receiving may include code for receiving signaling in the Residual Minimal System Information (RMSI) broadcast signal that includes an indication of whether one or more ROs will overlap with downlink transmissions.

[0164] In some cases, the code 1031 for receiving may include code for explicitly receiving signaling via RRC signaling, including an indication of whether one or more ROs will overlap with downlink transmissions.

[0165] In some cases, the code 1031 for receiving may include code for implicitly receiving signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, via radio resource control (RRC) periodic DL scheduling information.

[0166] In some cases, the code 1031 for receiving may include code for explicitly receiving signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, via downlink control information (DCI) or media access control element (MAC-CE).

[0167] In some cases, the code 1031 for receiving may include code for implicitly receiving signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, via downlink control information (DCI) or media access control element (MAC-CE).

[0168] In some cases, the code 1031 for receiving may include code for receiving signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, during a time period preceding the one or more time periods.

[0169] In some cases, the code 1034 used for selection may include a code for selecting the RO among the one or more ROs based on one or more criteria involving at least one of transmission latency or transmission reliability.

[0170] In the depicted example, one or more processors 1020 include circuitry configured to implement code stored in computer-readable medium / memory 1030, including circuitry 1021 for receiving, circuitry 1022 for transmitting, circuitry 1023 for executing, and circuitry 1024 for selecting.

[0171] In some cases, the circuitry 1021 for receiving may include a circuitry for receiving from a base station (BS) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods.

[0172] In some cases, the circuitry 1022 for transmission may include a circuitry for transmitting a random access channel (RACH) preamble to the BS in one of the one or more ROs during the one or more time periods based on the instruction.

[0173] In some cases, the circuitry 1023 for execution may include circuitry for performing RACH procedures with the BS based on the transmitted RACH preamble.

[0174] In some cases, the circuitry 1021 for receiving may include a circuitry for receiving signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, in a Residual Minimal System Information (RMSI) broadcast signal.

[0175] In some cases, the circuitry 1021 for receiving may include a circuitry for explicitly receiving signaling via RRC signaling that includes an indication of whether one or more ROs will overlap with downlink transmissions.

[0176] In some cases, the circuitry 1021 for receiving may include circuitry for implicitly receiving signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, via radio resource control (RRC) periodic DL scheduling information.

[0177] In some cases, the circuitry 1021 for receiving may include a circuitry for explicitly receiving signaling, including an indication of whether one or more ROs will overlap with a downlink transmission, via downlink control information (DCI) or media access control element (MAC-CE).

[0178] In some cases, the circuitry 1021 for receiving may include circuitry for implicitly receiving signaling, including an indication of whether one or more ROs will overlap with a downlink transmission, via downlink control information (DCI) or media access control element (MAC-CE).

[0179] In some cases, the circuitry 1021 for receiving may include a circuitry for receiving signaling, including an indication of whether one or more ROs will overlap with downlink transmissions, during a time period preceding the one or more time periods.

[0180] In some cases, the circuitry 1024 for selection may include a circuitry for selecting the RO from the one or more ROs based on one or more criteria involving at least one of transmission latency or transmission reliability.

[0181] Various components of the communication device 1000 can provide for performing the methods described herein (including references) Figure 7-8 ) device.

[0182] In some examples, the means for transmitting or sending (or the means for outputting for transmission) may include in Figure 2 The transceiver 254 and / or antennas 252 and / or... (as explained in the text) Figure 10 The transceiver 1008 and antenna 1010 of the communication equipment 1000.

[0183] In some examples, the means for receiving (or the means for obtaining) may include in Figure 2 The UE104 transceiver 254 and / or antennas 252 and / or Figure 10 The transceiver 1008 and antenna 1010 of the communication equipment 1000.

[0184] In some examples, the means for execution and the means for selection may include various processing system components, such as: Figure 10 One or more processors 1020, or Figure 2 The UE 104 depicted includes various aspects such as the receive processor 258, the transmit processor 264, the TX MIMO processor 266, and / or the controller / processor 280 (including the DL transmission indication component 281).

[0185] It is worth noting that, Figure 10 This is just one example, and many other examples and configurations of the communication device 1000 are possible.

[0186] Example Terms

[0187] Examples of implementations are described in the following numbered clauses:

[0188] Clause 1: A method of wireless communication by a base station (BS) includes: transmitting to a user equipment (UE) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions during one or more time periods; receiving a random access channel (RACH) preamble from the UE during one of the one or more time periods based on the indication; and performing RACH procedures with the UE based on the received RACH preamble.

[0189] Clause 2: The method as described in Clause 1, wherein for the initial access RACH procedure, the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission is transmitted in the Residual Minimal System Information (RMSI) broadcast signal.

[0190] Clause 3: As described in Clause 2, wherein the one or more time periods include time periods for transmitting RMSI broadcast signals.

[0191] Clause 4: The method as described in any of Clauses 1-3, wherein, for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether the corresponding RO will overlap with the downlink transmission in the one or more time periods.

[0192] Clause 5: The method as described in any of Clauses 1-3, wherein the indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more ROs during the one or more time periods.

[0193] Clause 6: The method as described in any of Clauses 1-5, wherein: the indication of whether the one or more ROs will overlap with the downlink transmission includes a bit mapping, the bit mapping including a set of bits, and each bit in the set of bits corresponding to a different RO among the one or more ROs and indicating whether the different ROs will overlap with the downlink transmission.

[0194] Clause 7: The method as described in any of Clauses 1-6, wherein the indication of whether the one or more ROs will overlap with the downlink transmission includes one or more Reference Signal Received Power (RSRP) thresholds.

[0195] Clause 8: The method as described in Clause 7, wherein: a first RSRP threshold indicates that a first corresponding RO among the one or more ROs will overlap with the downlink transmission during the one or more time periods; and a second RSRP threshold indicates that a second corresponding RO among the one or more ROs will overlap with the downlink transmission during the one or more time periods.

[0196] Clause 9: The method as described in Clause 7, wherein the one or more RSRP thresholds include one of the following: a plurality of different RSRP thresholds, wherein each of the plurality of different RSRP thresholds corresponds to a different corresponding RO in the one or more ROs; a first RSRP threshold applied to a subset of ROs in the one or more ROs; or a second RSRP threshold applied to all ROs in the one or more ROs.

[0197] Clause 10: The method described in any of Clauses 1-9, wherein the one or more time periods include Radio Resource Control (RRC) signaling time windows.

[0198] Clause 11: The method as described in Clause 10, wherein for the Connectivity Mode RACH procedure, the transmission of the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes the explicit transmission of the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via RRC signaling.

[0199] Clause 12: The method as described in Clause 11, wherein for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether that RO will overlap with the downlink transmission in the one or more time periods.

[0200] Clause 13: The method as described in Clause 11, wherein: the indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more time periods of the one or more ROs; or the indication of whether the one or more ROs will overlap with the downlink transmission applies to a subset of ROs in the one or more ROs.

[0201] Clause 14: The method as described in Clause 10, wherein for the connectivity mode RACH procedure, the transmission of the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes the implicit transmission of the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via RRC periodic DL scheduling information; and the indication of whether the one or more ROs will overlap with the downlink transmission includes SPS information indicating one or more downlink semi-persistent scheduling (SPS) timings that overlap with the one or more ROs in the one or more time periods.

[0202] Clause 15: The method as described in any of Clauses 1-14, wherein for the Connectivity Mode RACH protocol, the transmission of the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission explicitly transmitted via Downlink Control Information (DCI) or Media Access Control Control Element (MAC-CE).

[0203] Clause 16: The method as described in Clause 15, wherein for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether that RO will overlap with the downlink transmission in the one or more time periods.

[0204] Clause 17: The method as described in Clause 15, wherein: the indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more time periods of the one or more ROs; or the indication of whether the one or more ROs will overlap with the downlink transmission applies to a subset of ROs in the one or more ROs.

[0205] Clause 18: The method as described in any of Clauses 1-14, wherein, for the Connectivity Mode RACH protocol, the transmission of signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes, implicitly via Downlink Control Information (DCI) or Media Access Control Control Element (MAC-CE), the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission; and the indication of whether the one or more ROs will overlap with the downlink transmission includes scheduling information in which one or more of the DCI or the MAC-CE schedules the downlink transmission in the one or more time periods.

[0206] Clause 19: The method of any of Clauses 1-18, wherein transmitting the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission comprises: transmitting the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission in a time period preceding the one or more time periods.

[0207] Clause 20: The method as described in Clause 1, wherein: when the RO of one or more ROs overlaps with the downlink transmission, the RO includes a full-duplex RO; and when the RO does not overlap with the downlink transmission, the RO includes a half-duplex RO.

[0208] Clause 21: A method of wireless communication by a user equipment (UE) comprising: receiving from a base station (BS) signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions during one or more time periods; transmitting a random access channel (RACH) preamble to the BS during one or more ROs during the one or more time periods based on the indication; and performing RACH procedures with the BS based on the transmitted RACH preamble.

[0209] Clause 22: The method as described in Clause 21, wherein for the initial access RACH procedure, receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission is included in the Residual Minimal System Information (RMSI) broadcast signal.

[0210] Clause 23: As described in Clause 22, wherein the one or more time periods include a time period for receiving RMSI broadcast signals.

[0211] Clause 24: The method as described in any of Clauses 21-23, wherein, for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether the corresponding RO will overlap with the downlink transmission in the one or more time periods.

[0212] Clause 25: The method as described in any of Clauses 21-23, wherein the indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more ROs during the one or more time periods.

[0213] Clause 26: The method as described in any of Clauses 21-25, wherein: the indication of whether the one or more ROs will overlap with the downlink transmission includes a bit mapping, the bit mapping including a set of bits, and each bit in the set of bits corresponding to a different RO among the one or more ROs and indicating whether the different ROs will overlap with the downlink transmission.

[0214] Clause 27: The method as described in any of Clauses 21-26, wherein the indication of whether the one or more ROs will overlap with the downlink transmission includes one or more Reference Signal Received Power (RSRP) thresholds.

[0215] Clause 28: The method as described in Clause 27, wherein: a first RSRP threshold indicates that a first corresponding RO among the one or more ROs will overlap with the downlink transmission during the one or more time periods; and a second RSRP threshold indicates that a second corresponding RO among the one or more ROs will overlap with the downlink transmission during the one or more time periods.

[0216] Clause 29: The method as described in Clause 27, wherein the one or more RSRP thresholds include one of the following: a plurality of different RSRP thresholds, wherein each of the plurality of different RSRP thresholds corresponds to a different corresponding RO in the one or more ROs; a first RSRP threshold applied to a subset of ROs in the one or more ROs; or a second RSRP threshold applied to all ROs in the one or more ROs.

[0217] Clause 30: The method described in any of Clauses 21-29, wherein the one or more time periods include Radio Resource Control (RRC) signaling time windows.

[0218] Clause 31: The method as described in Clause 30, wherein for the Connectivity Mode RACH procedure, receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes explicitly receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via RRC signaling.

[0219] Clause 32: The method as described in Clause 31, wherein for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether that RO will overlap with the downlink transmission in the one or more time periods.

[0220] Clause 33: The method as described in Clause 31, wherein: the indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more time periods of the one or more ROs; or the indication of whether the one or more ROs will overlap with the downlink transmission applies to a subset of ROs in the one or more ROs.

[0221] Clause 34: The method as described in Clause 30, wherein for the connectivity mode RACH procedure, receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes implicitly receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via RRC periodic DL scheduling information; and the indication of whether the one or more ROs will overlap with the downlink transmission includes SPS information indicating one or more downlink semi-persistent scheduling (SPS) timings that overlap with the one or more ROs in the one or more time periods.

[0222] Clause 35: The method as described in any of Clauses 21-34, wherein, for the Connectivity Mode RACH procedure, receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes explicitly receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via Downlink Control Information (DCI) or Media Access Control Control Element (MAC-CE).

[0223] Clause 36: The method as described in Clause 35, wherein for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether that RO will overlap with the downlink transmission in the one or more time periods.

[0224] Clause 37: The method as described in Clause 35, wherein: the indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more time periods of the one or more ROs; or the indication of whether the one or more ROs will overlap with the downlink transmission applies to a subset of ROs in the one or more ROs.

[0225] Clause 38: The method of any of Clauses 21-34, wherein, for the Connectivity Mode RACH procedure, receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes implicitly receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via Downlink Control Information (DCI) or Media Access Control Control Element (MAC-CE); and the indication of whether the one or more ROs will overlap with the downlink transmission includes scheduling information in which one or more of the DCI or the MAC-CE schedules the downlink transmission in the one or more time periods.

[0226] Clause 39: The method of any of Clauses 21-38, wherein receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission in a time period preceding the one or more time periods.

[0227] Clause 40: The method as described in any of Clauses 21-39, wherein: when the RO of the one or more ROs overlaps with the downlink transmission, the RO includes a full-duplex RO; and when the RO does not overlap with the downlink transmission, the RO includes a half-duplex RO.

[0228] Clause 41: The method of any of Clauses 21-40 further includes selecting the RO among the one or more ROs based on one or more criteria involving at least one of transmission latency or transmission reliability.

[0229] Clause 42: An apparatus comprising: a memory including executable instructions; and one or more processors configured to execute the executable instructions and cause the apparatus to perform a method according to any one of Clauses 1-41.

[0230] Clause 43: An apparatus comprising means for performing a method according to any one of Clauses 1-41.

[0231] Clause 44: A non-transient computer-readable medium comprising executable instructions that, when executed by one or more processors of a device, cause the device to perform a method according to any one of Clauses 1-41.

[0232] Clause 45: A computer program product contained on a computer-readable storage medium, comprising code for performing a method pursuant to any of Clauses 1-41.

[0233] Additional wireless communication network considerations

[0234] The techniques and methods described herein can be used in a variety of wireless communication networks (or wireless wide area networks (WWANs)) and radio access technologies (RATs). While aspects may be described herein using terms commonly associated with 3G, 4G, and / or 5G (e.g., 5G New Radio (NR)) wireless technologies, aspects of this disclosure are equally applicable to other communication systems and standards not explicitly mentioned herein.

[0235] 5G wireless communication networks can support a variety of advanced wireless communication services, such as enhanced mobile broadband (eMBB), millimeter wave (mmWave), machine-type communication (MTC), and / or ultra-reliable, low latency communication (URLLC) for mission-critical applications. These and other services may include latency and reliability requirements.

[0236] return Figure 1 Various aspects of this disclosure can be implemented within the example wireless communication network 100.

[0237] In 3GPP, the term "cellular" can refer to the coverage area of ​​a B-node (NB) and / or the NB subsystem serving that coverage area, depending on the context in which the term is used. In NR systems, the term "cellular" and BS, next-generation B-node (gNB or gNodeB), access point (AP), distributed unit (DU), carrier, or transmit / receive point (TRP) are used interchangeably. A BS can provide communication coverage for macrocells, picocells, femtocells, and / or other types of cells.

[0238] Macrocells typically cover a relatively large geographic area (e.g., a radius of several kilometers) and allow unrestricted access by UEs with service subscriptions. Picocells cover a relatively small geographic area and allow unrestricted access by UEs with service subscriptions. Femtocells cover a relatively small geographic area (e.g., a residential area) and allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG) and UEs belonging to users in a residential building). A BS used for a macrocell may be referred to as a macro BS. A BS used for a picocell may be referred to as a pico BS. A BS used for a femtocell may be referred to as a femto BS or a home BS.

[0239] Base station 102 configured for 4G LTE (collectively referred to as Evolved Universal Mobile Telecommunications System (UMTS) Terrestrial Radio Access Network (E-UTRAN)) can interface with EPC 160 via a first backhaul link 132 (e.g., S1 interface). Base station 102 configured for 5G (e.g., 5G NR or Next Generation RAN (NG-RAN)) can interface with core network 190 via a second backhaul link 184. Base stations 102 can communicate with each other directly or indirectly (e.g., via EPC 160 or core network 190) on a third backhaul link 134 (e.g., X2 interface). The third backhaul link 134 can typically be wired or wireless.

[0240] Small cell 102' can operate in licensed and / or unlicensed spectrum. When operating in unlicensed spectrum, small cell 102' can employ NR and use the same 5 GHz unlicensed spectrum as that used by Wi-Fi AP 150. Small cell 102' employing NR in unlicensed spectrum can enhance access network coverage and / or increase access network capacity.

[0241] Some base stations (such as the BS180) can operate in conventional sub-6 GHz spectrum, millimeter wave (mmWave) frequencies, and / or near-mmWave frequencies to communicate with UE 104. When the BS180 operates in mmWave or near-mmWave frequencies, the BS180 may be referred to as an mmWave base station.

[0242] The communication link 120 between base station 102 and, for example, UE 104, may use one or more carriers. For example, for each carrier allocated in a carrier cluster totaling up to Yx MHz (x component carriers) for transmission in each direction, base station 102 and UE 104 may use a spectrum with a bandwidth of up to Y MHz (e.g., 5, 10, 15, 20, 100, 400 MHz, and other MHz). These carriers may or may not be adjacent to each other. The allocation of carriers may be asymmetric with respect to DL and UL (e.g., more or fewer carriers may be allocated to DL compared to UL). Component carriers may include primary component carriers and one or more secondary component carriers. The primary component carrier may be referred to as the primary cell (PCell), and the secondary component carriers may be referred to as secondary cells (SCells).

[0243] The wireless communication network 100 further includes a Wi-Fi access point (AP) 150 communicating with a Wi-Fi station (STA) 152 via a communication link 154 in, for example, unlicensed spectrum in the 2.4 GHz and / or 5 GHz range. When communicating in unlicensed spectrum, the STA 152 / AP 150 may perform a clear channel assessment (CCA) before communication to determine whether the channel is available.

[0244] Some UEs 104 may communicate with each other using device-to-device (D2D) communication link 158. D2D communication link 158 may use DL / UL WWAN spectrum. D2D communication link 158 may use one or more sidelink channels, such as the Physical Sidelink Broadcast Channel (PSBCH), Physical Sidelink Discovery Channel (PSDCH), Physical Sidelink Shared Channel (PSSCH), and Physical Sidelink Control Channel (PSCCH). D2D communication can be achieved through a wide variety of wireless D2D communication systems, such as, for example, FlashLinQ, WiMedia, Bluetooth, ZigBee, Wi-Fi based on the IEEE 802.11 standard, 4G (e.g., LTE), or 5G (e.g., NR), to name just a few options.

[0245] EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Serving Gateway 166, a Multimedia Broadcast Multicast Service (MBMS) Gateway 168, a Broadcast Multicast Service Center (BM-SC) 170, and a Packet Data Network (PDN) Gateway 172. MME 162 may communicate with the Home Subscriber Server (HSS) 174. MME 162 is the control node that handles signaling between UE 104 and EPC 160. Generally, MME 162 provides bearer and connection management.

[0246] Generally, user Internet Protocol (IP) packets are transmitted through Serving Gateway 166, which is itself connected to PDN Gateway 172. PDN Gateway 172 provides UE IP address allocation and other functions. PDN Gateway 172 and BM-SC 170 are connected to IP Service 176, which may include, for example, the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services.

[0247] The BM-SC 170 provides functionality for MBMS user service provisioning and delivery. The BM-SC 170 can serve as an entry point for content provider MBMS transmissions, authorize and initiate MBMS bearer services within a Public Land Mobile Network (PLMN), and schedule MBMS transmissions. The MBMS gateway 168 can distribute MBMS traffic to base station 102 within a Broadcast-Specific Service Single Frequency Network (MBSFN) area, and is responsible for session management (start / stop) and collecting eMBMS-related billing information.

[0248] The core network 190 may include Access and Mobility Management Functions (AMF) 192, other AMFs 193, Session Management Functions (SMF) 194, and User Plane Functions (UPF) 195. AMF 192 may communicate with Unified Data Management (UDM) 196.

[0249] AMF 192 is typically the control node that handles signaling between UE 104 and core network 190. Generally, AMF192 provides QoS flow and session management.

[0250] All user Internet Protocol (IP) packets are transmitted through UPF 195, which connects to IP service 197 and provides UE IP address allocation and other functions for core network 190. IP service 197 may include, for example, the Internet, intranet, IP Multimedia Subsystem (IMS), PS streaming service, and / or other IP services.

[0251] return Figure 2 The document describes BS102 and UE 104 (e.g., which can be used to implement various aspects of this disclosure). Figure 1 Various example components of the wireless communication network 100.

[0252] At BS102, the transmit processor 220 can receive data from the data source 212 and control information from the controller / processor 240. This control information can be for the Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid ARQ Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), Group Shared PDCCH (GC PDCCH), and others. In some examples, this data can be for the Physical Downlink Shared Channel (PDSCH).

[0253] The Media Access Control (MAC)-Control Element (MAC-CE) is a MAC layer communication structure used for exchanging control commands between wireless nodes. The MAC-CE can be carried in a shared channel, such as the Physical Downlink Shared Channel (PDSCH), Physical Uplink Shared Channel (PUSCH), or Physical Sidelink Shared Channel (PSSCH).

[0254] Processor 220 can process (e.g., encoding and symbol mapping) data and control information to obtain data symbols and control symbols, respectively. Transmit processor 220 can also generate reference symbols (such as those for primary synchronization signal (PSS), secondary synchronization signal (SSS), PBCH demodulation reference signal (DMRS), and channel state information reference signal (CSI-RS)).

[0255] The transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols where applicable, and can provide the output symbol stream to the modulators (MODs) 232a-232t in the transceiver. Each modulator 232a-232t in the transceiver can process its own output symbol stream (e.g., for OFDM) to obtain an output sample stream. Each modulator can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signal from the modulators 232a-232t in the transceiver can be transmitted via antennas 234a-234t respectively.

[0256] At UE 104, antennas 252a-252r can receive downlink signals from BS 102 and can provide the received signals to demodulators (DEMODs) 254a-254r in the transceiver, respectively. Each demodulator 254a-254r in the transceiver can condition (e.g., filter, amplify, down-convert, and digitize) its respective received signal to obtain an input sample. Each demodulator can further process the input sample (e.g., for OFDM) to obtain received symbols.

[0257] The MIMO detector 256 receives received symbols from all demodulators 254a-254r in the transceiver, performs MIMO detection on these received symbols where applicable, and provides detected symbols. The receiver processor 258 processes (e.g., demodulates, deinterleaves, and decodes) these detected symbols, provides the decoded data for UE 104 to the data trap 260, and provides the decoded control information to the controller / processor 280.

[0258] On the uplink, at UE 104, transmit processor 264 can receive and process data from data source 262 (e.g., for the Physical Uplink Shared Channel (PUSCH)) and control information from controller / processor 280 (e.g., for the Physical Uplink Control Channel (PUCCH)). Transmit processor 264 can also generate reference symbols for reference signals (e.g., probe reference signals (SRS)). Symbols from transmit processor 264 can be pre-encoded by TX MIMO processor 266 where applicable, further processed by modulators 254a-254r in the transceiver (e.g., for SC-FDM), and transmitted to BS 102.

[0259] At BS102, uplink signals from UE 104 can be received by antennas 234a-t, processed by demodulators 232a-232t in the transceiver, detected by MIMO detector 236 where applicable, and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 104. Receiver processor 238 can provide the decoded data to data trap 239 and the decoded control information to controller / processor 240.

[0260] Memory 242 and 282 can store data and program code for use by BS102 and UE 104, respectively.

[0261] Scheduler 244 can schedule UEs to perform data transmission on downlink and / or uplink.

[0262] 5G can utilize Orthogonal Frequency Division Multiplexing (OFDM) with a cyclic prefix (CP) on both the uplink and downlink. 5G can also support half-duplex operation using Time Division Duplex (TDD). OFDM and Single-Carrier Frequency Division Multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, often referred to as frequency modulation and frequency slots. Each subcarrier can be modulated with data. Modulation symbols can be transmitted in the frequency domain using OFDM and in the time domain using SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. In some examples, the minimum resource allocation (called a resource block (RB)) can be 12 consecutive subcarriers. The system bandwidth can also be divided into subbands. For example, a subband can cover multiple RBs. NR can support a base subcarrier spacing (SCS) of 15 kHz and can define other SCSs (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, and others) relative to the base SCS.

[0263] Figure 3A , 3B 3C and 3D depict the use of wireless communication networks (such as...) Figure 1 Various examples of data structures in a wireless communication network 100.

[0264] In various aspects, the 5G NR frame structure can be Frequency Division Duplex (FDD), where subframes within a specific set of subcarriers (carrier system bandwidth) are dedicated to either DL (deepening) or UL (ultra-lowering). The 5G frame structure can also be Time Division Duplex (TDD), where subframes within a specific set of subcarriers (carrier system bandwidth) are dedicated to both DL and UL. Figure 3A and Figure 3CIn the provided example, the 5G frame structure is assumed to be TDD, where subframe 4 is configured with slot format 28 (mostly DL) and subframe 3 is configured with slot format 34 (mostly UL), where D is DL, U is UL, and X is for flexible use between DL and UL. Although subframes 3 and 4 are shown as having slot formats 34 and 28, respectively, any particular subframe can be configured with any of the various available slot formats 0-61. Slot formats 0 and 1 are full DL and full UL, respectively. Other slot formats 2-61 include a mixture of DL, UL, and flexible symbols. The UE is configured to have a slot format via the received Slot Format Indicator (SFI) (dynamically configured via DL Control Information (DCI) or semi-statically / statically configured via Radio Resource Control (RRC) signaling). Note that the following description also applies to 5G frame structures for TDD.

[0265] Other wireless communication technologies may have different frame structures and / or different channels. A frame (10 ms) can be divided into 10 equally sized subframes (1 ms). Each subframe may include one or more time slots. Subframes may also include mini-time slots, which may contain 7, 4, or 2 symbols. In some examples, each time slot may contain 7 or 14 symbols, depending on the time slot configuration.

[0266] For example, for slot configuration 0, each slot may include 14 symbols, while for slot configuration 1, each slot may include 7 symbols. Symbols on the DL can be Cyclic Prefix (CP) OFDM (CP-OFDM) symbols. Symbols on the UL can be CP-OFDM symbols (for high-throughput scenarios) or Discrete Fourier Transform (DFT) Extended OFDM (DFT-s-OFDM) symbols (also known as Single Carrier Frequency Division Multiple Access (SC-FDMA) symbols) (for power-constrained scenarios; limited to single-stream transmission).

[0267] The number of time slots per subframe is based on the time slot configuration and parameter design. For time slot configuration 0, different parameter designs (μ) 0 to 5 allow 1, 2, 4, 8, 16, and 32 time slots per subframe, respectively. For time slot configuration 1, different parameter designs 0 to 2 allow 2, 4, and 8 time slots per subframe, respectively. Correspondingly, for time slot configuration 0 and parameter design μ, there are 14 symbols per time slot and 2 symbols per subframe. μ Each time slot. The subcarrier spacing and symbol length / duration vary depending on the design parameters. The subcarrier spacing can be equal to 2. μ ×15kHz, where μ is the parameter design from 0 to 5. Thus, parameter design μ=0 has a subcarrier spacing of 15kHz, while parameter design μ=5 has a subcarrier spacing of 480kHz. Symbol length / duration is inversely correlated with subcarrier spacing. Figure 3A , 3BExamples of time slot configuration 0 with 14 symbols per time slot and parameter design μ=2 with 4 time slots per subframe are provided in 3C and 3D. The time slot duration is 0.25ms, the subcarrier spacing is 60kHz, and the symbol duration is approximately 16.67μs.

[0268] A resource grid can be used to represent the frame structure. Each time slot includes a resource block (RB) extending 12 consecutive subcarriers (also known as a physical RB (PRB)). The resource grid is divided into multiple resource elements (REs). The number of bits carried by each RE depends on the modulation scheme.

[0269] like Figure 3A As explained in the text, some REs are carried for the UE (e.g., Figure 1 and Figure 2 The reference (pilot) signal (RS) for UE 104. The RS may include a demodulated RS (DM-RS) for channel estimation at the UE (indicated as R for a particular configuration). x (where 100x is the port number, but other DM-RS configurations are possible) and Channel State Information Reference Signal (CSI-RS). RS may also include Beam Measurement RS (BRS), Beam Refinement RS (BRRS), and Phase Tracking RS (PT-RS).

[0270] Figure 3B Examples of various DL channels within a frame's subframes are explained. The Physical Downlink Control Channel (PDCCH) carries the DCI within one or more Control Channel Elements (CCEs), each CCE comprising 9 RE Groups (REGs), each REG comprising 4 consecutive REs in OFDM symbols.

[0271] The Primary Synchronization Signal (PSS) can be located within symbol 2 of a specific subframe of a frame. The PSS is generated by the UE (e.g., ...). Figure 1 and Figure 2 104) is used to determine subframe / symbol timing and physical layer identity.

[0272] The secondary synchronization signal (SSS) can be found in symbol 4 of a specific subframe of a frame. The SSS is used by the UE to determine the physical layer cell identity group number and radio frame timing.

[0273] Based on the Physical Layer Identity and Physical Layer Cell Identity Group Number, the UE can determine the Physical Cell Identifier (PCI). Based on the PCI, the UE can determine the location of the aforementioned DM-RS. The Physical Broadcast Channel (PBCH), carrying the Master Information Block (MIB), can be logically grouped with the PSS and SSS to form a Synchronization Signal (SS) / PBCH block. The MIB provides the number of RBs in the system bandwidth and the System Frame Number (SFN). The Physical Downlink Shared Channel (PDSCH) carries user data, broadcast system information not transmitted via the PBCH (such as System Information Block (SIB)), and paging messages.

[0274] As in Figure 3C As explained, some REs carry DM-RS for channel estimation at the base station (indicated as R for a specific configuration, but other DM-RS configurations are possible). The UE can transmit DM-RS for the Physical Uplink Control Channel (PUCCH) and DM-RS for the Physical Uplink Shared Channel (PUSCH). The PUSCH DM-RS can be transmitted in the first or first two symbols of the PUSCH. The PUCCH DM-RS can be transmitted in different configurations depending on whether a short or long PUCCH is being transmitted and on the specific PUCCH format used. The UE can transmit a probe reference signal (SRS). The SRS can be transmitted in the last symbol of a subframe. The SRS can have a comb structure, and the UE can transmit the SRS on one of the combs. The SRS can be used by the base station for channel quality estimation to enable frequency-dependent scheduling on the UL.

[0275] Figure 3D Examples of various UL channels within a subframe of a frame are explained. The PUCCH can be located as indicated in one configuration. The PUCCH carries uplink control information (UCI), such as scheduling requests, channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), and HARQ ACK / NACK feedback. The PUSCH carries data and may additionally be used to carry buffer status reports (BSR), power clearance reports (PHR), and / or UCI.

[0276] Additional considerations

[0277] The foregoing description provides an example of downlink transmission indication for a random access channel (RO) in a communication system. The foregoing description is provided to enable any person skilled in the art to practice the various aspects described herein. The examples discussed herein are not intended to limit the scope, applicability, or aspects set forth in the claims. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. For example, changes may be made to the function and arrangement of the elements in discussion without departing from the scope of this disclosure. Various procedures or components may be appropriately omitted, substituted, or added to various examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Moreover, features described with reference to some examples may be combined in others. For example, any number of aspects set forth herein may be used to implement an apparatus or practice a method. Furthermore, the scope of this disclosure is intended to cover such apparatuses or methods practiced using other structures, functionalities, or structures and functionalities that supplement or differ from the aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be implemented by one or more elements of the claims.

[0278] The techniques described in this document can be used in various wireless communication technologies, such as 5G (e.g., 5G NR), 3GPP Long Term Evolution (LTE), LTE-A Advanced (LTE-A), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC-FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often used interchangeably. CDMA networks can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and others. UTRA includes Wideband CDMA (WCDMA) and other variations of CDMA. cdma2000 encompasses the IS-2000, IS-95, and IS-856 standards. TDMA networks can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement technologies such as NR (e.g., 5G RA), evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, and other radio technologies. UTRA and E-UTRA are parts of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are UMTS versions using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). cdma2000 and UMB are described in documents from an organization called the 3rd Generation Partnership Project 2 (3GPP2). NR is an emerging wireless communication technology under development.

[0279] The various illustrative logic blocks, modules, and circuits described in this disclosure can be implemented or executed using a general-purpose processor, DSP, ASIC, field-programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. The general-purpose processor may be a microprocessor, but in alternatives, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors working in conjunction with a DSP core, a system-on-a-chip (SoC), or any other such configuration.

[0280] If implemented in hardware, an example hardware configuration could include a processing system in a wireless node. The processing system can be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus can include any number of interconnect buses and bridges. The bus can link together various circuits, including a processor, machine-readable media, and a bus interface. The bus interface can be used to connect network adapters, etc., to the processing system via the bus. The network adapter can be used to implement signal processing functions at the PHY layer. In user equipment (see...) Figure 1 In such cases, the user interface (e.g., keypad, display, mouse, joystick, touchscreen, biometric sensor, proximity sensor, light-emitting element, and others) can also be connected to the bus. The bus can also link various other circuits, such as timing sources, peripheral devices, voltage regulators, power management circuits, and similar circuits, which are well known in the art and will not be described further. The processor can be implemented using one or more general-purpose and / or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuit systems capable of executing software. Depending on the specific application and the overall design constraints imposed on the system, those skilled in the art will recognize how best to implement the functionality described for the processing system.

[0281] If implemented in software, the functions can be stored or transmitted as one or more instructions or codes on a computer-readable medium. Software should be broadly interpreted to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise. Computer-readable media includes both computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on the machine-readable storage medium. The computer-readable storage medium may be coupled to the processor so that the processor can read and write information to / from the storage medium. Alternatively, the storage medium may be integrated into the processor. As an example, the machine-readable medium may include a transmission line, a data-modulated carrier wave, and / or a separate computer-readable storage medium containing instructions stored thereon, all accessible to the processor via a bus interface. Alternatively or additionally, the machine-readable medium or any portion thereof may be integrated into the processor, such as caches and / or general-purpose register files. As an example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be implemented in computer program products.

[0282] Software modules may comprise a single instruction or a number of instructions, and may be distributed across several different code segments, across different programs, and across multiple storage media. Computer-readable media may include multiple software modules. These software modules include instructions that, when executed by an instrument (such as a processor), enable the processing system to perform various functions. These software modules may include transfer modules and receive modules. Each software module may reside in a single storage device or be distributed across multiple storage devices. As an example, when a trigger event occurs, a software module may be loaded from a hard drive into RAM. During the execution of a software module, the processor may load some instructions into a cache to improve access speed. One or more cache lines may subsequently be loaded into a general-purpose register file for processor execution. In the context of the functionality of a software module described below, it will be understood that such functionality is implemented by the processor when the processor executes the instructions from that software module.

[0283] As used herein, the phrase “at least one of” a list of items refers to any combination of those items, including a single member. As an example, “at least one of a, b, or c” is intended to cover: a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0284] As used herein, the term "determine" encompasses a wide variety of actions. For example, "determine" can include calculation, computation, processing, derivation, research, searching (e.g., looking in a table, database, or other data structure), ascertainment, and similar actions. Furthermore, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), and the like. Moreover, "determine" can include parsing, selecting, choosing, building, and the like.

[0285] The methods disclosed herein include one or more steps or actions for implementing the method. These method steps and / or actions may be interchanged without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions may be modified without departing from the scope of the claims. Furthermore, the various operations of the above methods can be performed by any suitable means capable of performing the corresponding functions. These means may include various hardware and / or software components and / or modules, including but not limited to circuits, application-specific integrated circuits (ASICs), or processors. Generally, where operations illustrated in the drawings are present, these operations may have corresponding paired means with similar numbers plus functional components.

[0286] The following claims are not intended to be limited to the aspects shown herein, but should be granted the full scope consistent with the language of the claims. Within the claims, references to singular elements are not intended to mean “one and only one” (unless specifically stated so), but rather “one or more.” Unless specifically stated otherwise, the term “some / a” refers to one or more. No element of the claims should be interpreted in accordance with the provisions of 35 U.S.SC §112(f) unless the element is expressly stated using the phrase “means for…” or, in the case of a method claim, the element is stated using the phrase “steps for…”. Elements of all aspects described throughout this disclosure that are now or hereafter known to a person skilled in the art are expressly incorporated herein by reference and are intended to be covered by the claims. Furthermore, nothing disclosed herein is intended to be donated to the public, whether or not such disclosure is expressly stated in the claims.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: Receive signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; Based on the indication, transmit the Random Access Channel (RACH) preamble in one or more ROs during the one or more time periods, wherein: When one or more ROs overlap with the downlink transmission, the RO includes a full-duplex RO; and When the RO does not overlap with the downlink transmission, the RO includes a half-duplex RO; and The RACH procedure is executed based on the transmitted RACH preamble.

2. The method of claim 1, wherein, for the initial access RACH procedure, receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission is included in the Residual Minimal System Information (RMSI) broadcast signal.

3. The method of claim 2, wherein the one or more time periods include a time period for receiving RMSI broadcast signals.

4. The method of claim 1, wherein for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether the corresponding RO will overlap with the downlink transmission in the one or more time periods.

5. The method of claim 1, wherein the indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more ROs during the one or more time periods.

6. The method of claim 1, wherein: The indication of whether the one or more ROs will overlap with the downlink transmission includes a bit mapping, the bit mapping including a set of bits, and Each bit in the bit set corresponds to a different RO among the one or more ROs and indicates whether the different RO will overlap with the downlink transmission.

7. The method of claim 1, wherein the indication of whether the one or more ROs will overlap with the downlink transmission includes one or more reference signal received power (RSRP) thresholds.

8. The method of claim 7, wherein: The first RSRP threshold indicates that the first corresponding RO among the one or more ROs will overlap with the downlink transmission in the one or more time periods; and The second RSRP threshold indicates that the second corresponding RO in the one or more ROs will overlap with the downlink transmission in the one or more time periods.

9. The method of claim 7, wherein the one or more RSRP thresholds include one of the following: Multiple different RSRP thresholds, wherein each of the multiple different RSRP thresholds corresponds to a different corresponding RO in the one or more ROs; A first RSRP threshold applied to a subset of ROs in one or more ROs; or A second RSRP threshold is applied to all ROs in the one or more ROs.

10. The method of claim 1, wherein, for a connected mode RACH protocol, receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes explicitly receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via RRC signaling.

11. The method of claim 10, wherein for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether that RO will overlap with the downlink transmission in the one or more time periods.

12. The method of claim 10, wherein: The indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more time periods; or The indication of whether the one or more ROs will overlap with the downlink transmission is applied to a subset of the one or more ROs.

13. The method of claim 10, wherein the one or more time periods include an RRC signaling time window.

14. The method of claim 1, wherein: For the Connectivity Mode RACH protocol, receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes implicitly receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via Radio Resource Control (RRC) periodic DL scheduling information; and The indication of whether the one or more ROs will overlap with the downlink transmission includes SPS information indicating one or more downlink semi-persistent scheduling (SPS) timings that overlap with the one or more ROs during the one or more time periods.

15. The method of claim 1, wherein, for a connectivity mode RACH protocol, receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission comprises explicitly receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via downlink control information (DCI) or media access control element (MAC-CE).

16. The method of claim 15, wherein for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether that RO will overlap with the downlink transmission in the one or more time periods.

17. The method of claim 15, wherein: The indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more time periods; or The indication of whether the one or more ROs will overlap with the downlink transmission is applied to a subset of the one or more ROs.

18. The method of claim 1, wherein: For the Connectivity Mode RACH protocol, receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes implicitly receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via Downlink Control Information (DCI) or Media Access Control (MAC-CE); and The indication of whether the one or more ROs will overlap with the downlink transmission includes scheduling information indicating, in at least one of the DCI or the MAC-CE, that the downlink transmission will be scheduled during the one or more time periods.

19. The method of claim 1, wherein receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes receiving the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission during a time period preceding the one or more time periods.

20. The method of claim 1, further comprising selecting the RO among the one or more ROs based on one or more criteria involving at least one of transmission latency or transmission reliability.

21. A method for wireless communication by a wireless node, comprising: The transmission includes signaling indicating whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; Based on the indication, receive the random access channel (RACH) preamble in one or more ROs during the one or more time periods, wherein: When one or more ROs overlap with the downlink transmission, the RO includes a full-duplex RO; and When the RO does not overlap with the downlink transmission, the RO includes a half-duplex RO; as well as The RACH procedure is executed based on the received RACH preamble.

22. The method of claim 21, wherein, for the initial access RACH procedure, the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission is transmitted in a Residual Minimal System Information (RMSI) broadcast signal.

23. The method of claim 21, wherein the indication of whether the one or more ROs will overlap with the downlink transmission includes one or more reference signal received power (RSRP) thresholds.

24. The method of claim 21, wherein, for a connected mode RACH protocol, transmitting the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes explicitly transmitting the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via RRC signaling.

25. The method of claim 21, wherein: For the Connectivity Mode RACH protocol, the transmission of signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes implicit transmission of the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via Radio Resource Control (RRC) periodic DL scheduling information; and The indication of whether the one or more ROs will overlap with the downlink transmission includes SPS information indicating one or more downlink semi-persistent scheduling (SPS) timings that overlap with the one or more ROs during the one or more time periods.

26. The method of claim 21, wherein, for a connected mode RACH protocol, the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission includes explicitly transmitting the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via downlink control information (DCI) or media access control element (MAC-CE).

27. The method of claim 21, wherein: For the Connectivity Mode RACH protocol, the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission is implicitly transmitted via Downlink Control Information (DCI) or Media Access Control (MAC-CE) element, including the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission; and The indication of whether the one or more ROs will overlap with the downlink transmission includes scheduling information indicating, in at least one of the DCI or the MAC-CE, that the downlink transmission will be scheduled during the one or more time periods.

28. An apparatus for wireless communication by a user equipment (UE), comprising: The memory includes executable instructions; as well as Processor, the processor being configured to execute the executable instructions and cause the device to: Receive signaling including an indication of whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; Based on the indication, transmit the Random Access Channel (RACH) preamble in one or more ROs during the one or more time periods, wherein: When one or more ROs overlap with the downlink transmission, the RO includes a full-duplex RO; and When the RO does not overlap with the downlink transmission, the RO includes a half-duplex RO; and The RACH procedure is executed based on the transmitted RACH preamble.

29. The apparatus of claim 28, wherein, for the initial access RACH procedure, in order to receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission in a Residual Minimal System Information (RMSI) broadcast signal.

30. The apparatus of claim 29, wherein the one or more time periods include a time period for receiving RMSI broadcast signals.

31. The apparatus of claim 28, wherein for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether the corresponding RO will overlap with the downlink transmission in the one or more time periods.

32. The apparatus of claim 28, wherein the indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more ROs during the one or more time periods.

33. The apparatus of claim 28, wherein: The indication of whether the one or more ROs will overlap with the downlink transmission includes a bit mapping, the bit mapping including a set of bits, and Each bit in the bit set corresponds to a different RO among the one or more ROs and indicates whether the different RO will overlap with the downlink transmission.

34. The apparatus of claim 28, wherein the indication of whether the one or more ROs will overlap with the downlink transmission includes one or more reference signal received power (RSRP) thresholds.

35. The apparatus of claim 34, wherein: The first RSRP threshold indicates that the first corresponding RO among the one or more ROs will overlap with the downlink transmission in the one or more time periods; and The second RSRP threshold indicates that the second corresponding RO in the one or more ROs will overlap with the downlink transmission in the one or more time periods.

36. The apparatus of claim 34, wherein the one or more RSRP thresholds include one of the following: Multiple different RSRP thresholds, wherein each of the multiple different RSRP thresholds corresponds to a different corresponding RO in the one or more ROs; A first RSRP threshold applied to a subset of ROs in one or more ROs; or A second RSRP threshold is applied to all ROs in the one or more ROs.

37. The apparatus of claim 28, wherein, for a connected mode RACH protocol, in order to receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to explicitly receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via RRC signaling.

38. The apparatus of claim 37, wherein for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether that RO will overlap with the downlink transmission in the one or more time periods.

39. The apparatus of claim 37, wherein: The indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more time periods; or The indication of whether the one or more ROs will overlap with the downlink transmission is applied to a subset of the one or more ROs.

40. The apparatus of claim 37, wherein the one or more time periods include an RRC signaling time window.

41. The apparatus of claim 28, wherein: For the Connectivity Mode RACH protocol, in order to receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to implicitly receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via Radio Resource Control (RRC) periodic DL scheduling information; and The indication of whether the one or more ROs will overlap with the downlink transmission includes SPS information indicating one or more downlink semi-persistent scheduling (SPS) timings that overlap with the one or more ROs during the one or more time periods.

42. The apparatus of claim 28, wherein, for a connected mode RACH protocol, in order to receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to explicitly receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via a downlink control information (DCI) or a media access control element (MAC-CE).

43. The apparatus of claim 42, wherein for each of the one or more ROs in the one or more time periods, the indication includes an individual indication of whether that RO will overlap with the downlink transmission in the one or more time periods.

44. The apparatus of claim 42, wherein: The indication of whether the one or more ROs will overlap with the downlink transmission is the same for all ROs in the one or more time periods; or The indication of whether the one or more ROs will overlap with the downlink transmission is applied to a subset of the one or more ROs.

45. The apparatus of claim 28, wherein: For the Connectivity Mode RACH protocol, in order to receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to implicitly receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via Downlink Control Information (DCI) or Media Access Control Control Element (MAC-CE); and The indication of whether the one or more ROs will overlap with the downlink transmission includes scheduling information indicating, in at least one of the DCI or the MAC-CE, that the downlink transmission will be scheduled during the one or more time periods.

46. ​​The apparatus of claim 28, wherein, in order to receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to receive the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission in a time period preceding the one or more time periods.

47. The apparatus of claim 28, wherein the processor is further configured to select the RO among the one or more ROs based on one or more criteria involving at least one of transmission latency or transmission reliability.

48. An apparatus for wireless communication by a wireless node, comprising: The memory includes executable instructions; as well as The processor is configured to execute the executable instructions and cause the wireless node to: The transmission includes signaling indicating whether one or more random access channel timings (ROs) will overlap with downlink transmissions in one or more time periods; Based on the indication, receive the random access channel (RACH) preamble in one or more ROs during the one or more time periods, wherein: When one or more ROs overlap with the downlink transmission, the RO includes a full-duplex RO; and When the RO does not overlap with the downlink transmission, the RO includes a half-duplex RO; as well as The RACH procedure is executed based on the received RACH preamble.

49. The apparatus of claim 48, wherein, for the initial access RACH procedure, in order to transmit the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to transmit the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission in a Residual Minimal System Information (RMSI) broadcast signal.

50. The apparatus of claim 48, wherein the indication of whether the one or more ROs will overlap with the downlink transmission includes one or more reference signal received power (RSRP) thresholds.

51. The apparatus of claim 48, wherein, for a connected mode RACH protocol, in order to transmit the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to explicitly transmit the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via RRC signaling.

52. The apparatus of claim 48, wherein: For the Connectivity Mode RACH protocol, in order to transmit the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to implicitly transmit the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via Radio Resource Control (RRC) periodic DL scheduling information; and The indication of whether the one or more ROs will overlap with the downlink transmission includes SPS information indicating one or more downlink semi-persistent scheduling (SPS) timings that overlap with the one or more ROs during the one or more time periods.

53. The apparatus of claim 48, wherein, for the connectivity mode RACH protocol, in order to transmit the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to explicitly transmit the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via downlink control information (DCI) or media access control element (MAC-CE).

54. The apparatus of claim 48, wherein: For the Connectivity Mode RACH protocol, in order to transmit the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission, the processor is configured to implicitly transmit the signaling including the indication of whether the one or more ROs will overlap with the downlink transmission via Downlink Control Information (DCI) or Media Access Control Control Element (MAC-CE); and The indication of whether the one or more ROs will overlap with the downlink transmission includes scheduling information indicating, in at least one of the DCI or the MAC-CE, that the downlink transmission will be scheduled during the one or more time periods.

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