Method and apparatus for assigning time domain resources to one or more sets of consecutive OFDM symbols

Abstract

A method for wireless communication by a user equipment (UE) includes receiving from a base station a signaling indicating that resources in a physical time domain are assigned to a set of continuous symbols in a virtual domain. Each symbol in the set of continuous symbols in the virtual domain can be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more continuous orthogonal frequency division multiplexing (OFDM) symbols in the physical time domain. Each OFDM symbol set can be associated with a respective time slot in a plurality of time slots in the physical time domain. Multiple OFDM symbol sets can carry a single physical channel payload. The method also includes mapping physical time domain resources to a plurality of OFDM symbol sets based on assigning physical time domain resources to a set of continuous symbols in the virtual domain. The method also includes receiving or sending a plurality of OFDM symbol sets on physical time domain resources based on mapping.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. patent application No. 17 / 471,346, filed on September 10, 2021, entitled “ASSIGNING TIME DOMAIN UPLINK RESOURCES TO FRAGMENTED UPLINK ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYMBOLS,” which claims the benefit of U.S. provisional patent application No. 63 / 076,879, filed on September 10, 2020, entitled “ASSIGNING TIME DOMAIN UPLINK RESOURCES TO FRAGMENTED UPLINK ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING (OFDM) SYMBOLS,” the disclosures of which are expressly incorporated herein by reference in their entirety. Technical Field

[0003] Aspects of the present disclosure relate generally to wireless communications, and more particularly to assigning time-domain resources to fragmented orthogonal frequency division multiplexing (OFDM) symbols for transmission on a physical channel. Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard issued by the Third Generation Partnership Project (3GPP). Narrowband (NB) Internet of Things (IoT) and enhanced machine type communication (eMTC) are sets of enhancements to LTE for machine type communication.

[0005] A wireless communication network may include a number of base stations (BSs), which may support communications for a number of user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. A downlink (or forward link) refers to a communication link from a BS to a UE, and an uplink (or reverse link) refers to a communication link from a UE to a BS. As will be described in more detail, a BS may refer to a Node B, an evolved Node B (eNB), a gNB, an access point (AP), a radio head, a transmit and receive point (TRP), a new radio (NR) BS, a 5G Node B, etc.

[0006] The above multiple access technology has been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate at a city level, a national level, a regional level, and even a global level. NR (which may also be referred to as 5G) is a set of enhancements to the LTE mobile standard released by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by improving spectrum efficiency, reducing costs, improving services, utilizing new spectrum, using orthogonal frequency division multiplexing (OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-S-OFDM)) on the uplink (UL), and supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0007] In a wireless communication system, communication resources (e.g., uplink communication resources or downlink communication resources) may be assigned to symbols of orthogonal frequency division multiplexing (OFDM) within a time division duplex (TDD) uplink / downlink (UL / DL) mode. In some examples, both a first OFDM symbol set and a second OFDM symbol set may be associated with an uplink transmission or a downlink transmission. Each OFDM symbol set may include one or more consecutive OFDM symbols. In some such examples, the first OFDM symbol set and the second OFDM symbol set may be separated by a slot edge or one or more different OFDM symbols. In such an example, each of the first OFDM symbol set and the second OFDM symbol set may be an example of an OFDM symbol fragment. In one example, a first uplink OFDM symbol set and a second uplink OFDM symbol set may be separated by one or more downlink OFDM symbols or one or more flexible OFDM symbols. Similarly, the first set of downlink OFDM symbols and the second set of downlink OFDM symbols may be separated by one or more uplink OFDM symbols or one or more flexible OFDM symbols. Summary of the invention

[0008] In one aspect of the present disclosure, a method for wireless communication performed by a user equipment (UE) is disclosed. The method includes receiving from a base station a signaling indicating that resources in a physical time domain are assigned to a set of continuous symbols in a virtual domain. Each symbol in the set of continuous symbols in the virtual domain may be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more continuous orthogonal frequency division multiplexing (OFDM) symbols in the physical time domain. Each OFDM symbol set may be associated with a respective time slot in a plurality of time slots in the physical time domain. Multiple OFDM symbol sets may carry a single physical channel payload. The method also includes mapping the physical time domain resources to the number of OFDM symbol sets based on assigning the physical time domain resources to the set of continuous symbols in the virtual domain. The method also includes receiving or sending multiple OFDM symbol sets on the physical time domain resources based on the mapping.

[0009] Another aspect of the present disclosure is directed to a device for wireless communication at a UE. The device includes a unit for receiving from a base station a signaling indicating that resources in a physical time domain are assigned to a set of continuous symbols in a virtual domain. Each symbol in the set of continuous symbols in the virtual domain can be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more continuous OFDM symbols in the physical time domain. Each OFDM symbol set can be associated with a respective time slot in a plurality of time slots in the physical time domain. Multiple OFDM symbol sets can carry a single physical channel payload. The device also includes a unit for mapping physical time domain resources to the number of OFDM symbol sets based on assigning physical time domain resources to a set of continuous symbols in the virtual domain. The device also includes a unit for receiving or sending multiple OFDM symbol sets on physical time domain resources based on mapping.

[0010] In another aspect of the present disclosure, a non-transitory computer-readable medium having a non-transitory program code recorded thereon for wireless communication at a UE is disclosed. The program code is executed by a processor and includes a program code for receiving from a base station a signaling indicating that resources in a physical time domain are assigned to a continuous symbol set in a virtual domain. Each symbol in a continuous symbol set in a virtual domain may be associated with a respective OFDM symbol in a respective set of multiple sets of one or more continuous OFDM symbols in a physical time domain. Each OFDM symbol set may be associated with a respective time slot in a plurality of time slots in a physical time domain. Multiple OFDM symbol sets may carry a single physical channel payload. The program code also includes a program code for mapping physical time domain resources to the number of OFDM symbol sets based on assigning physical time domain resources to a continuous symbol set in a virtual domain. The program code also includes a program code for receiving or sending multiple OFDM symbol sets on physical time domain resources based on mapping.

[0011] Another aspect of the present disclosure is directed to a device for wireless communication at a UE. The device includes a processor, a memory coupled to the processor, and an instruction, which is stored in the memory and can be operated to cause the device to receive from a base station a signal indicating that resources in a physical time domain are assigned to a continuous symbol set in a virtual domain. Each symbol in the continuous symbol set in the virtual domain can be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more continuous OFDM symbols in the physical time domain. Each OFDM symbol set can be associated with a respective time slot in a plurality of time slots in the physical time domain. Multiple OFDM symbol sets can carry a single physical channel payload. The execution of the instruction also causes the device to map the physical time domain resources to the number of OFDM symbol sets based on assigning the physical time domain resources to the continuous symbol set in the virtual domain. The execution of the instruction also causes the device to receive or send multiple OFDM symbol sets on the physical time domain resources based on the mapping.

[0012] In one aspect of the present disclosure, a method for wireless communication performed by a base station is disclosed. The method includes assigning physical time domain resources to a set of continuous symbols in a virtual domain. The method also includes mapping the physical time domain resources assigned to the continuous symbol set to multiple sets of one or more continuous OFDM symbols in the physical time domain. Each OFDM symbol set can be associated with a respective time slot in a plurality of time slots in the physical time domain. Multiple OFDM symbol sets can carry a single physical channel payload. The method also includes sending a signaling to a UE to indicate that the physical time domain resources are assigned to a set of continuous symbols in the virtual domain. Each symbol in the continuous symbol set can be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more continuous OFDM symbols. The method also includes receiving or sending multiple OFDM symbol sets on the physical time domain resources based on the mapping.

[0013] Another aspect of the present disclosure is directed to a device for wireless communication at a base station. The device includes a unit for assigning physical time domain resources to a set of continuous symbols in a virtual domain. The device also includes a unit for mapping the physical time domain resources assigned to the continuous symbol set to multiple sets of one or more continuous OFDM symbols in the physical time domain. Each OFDM symbol set can be associated with a respective time slot in a plurality of time slots in the physical time domain. Multiple OFDM symbol sets can carry a single physical channel payload. The device also includes a unit for sending a signaling to a UE indicating that physical time domain resources are assigned to a set of continuous symbols in the virtual domain. Each symbol in the continuous symbol set can be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more continuous OFDM symbols. The device also includes a unit for receiving or sending multiple OFDM symbol sets on physical time domain resources based on mapping.

[0014] In another aspect of the present disclosure, a non-transitory computer-readable medium having a non-transitory program code recorded thereon for wireless communication at a base station is disclosed. The program code is executed by a processor and includes a program code for assigning physical time domain resources to a continuous symbol set in a virtual domain. The program code also includes a program code for mapping the physical time domain resources assigned to the continuous symbol set to multiple sets of one or more continuous OFDM symbols in the physical time domain. Each OFDM symbol set can be associated with a respective time slot in a plurality of time slots in the physical time domain. Multiple OFDM symbol sets can carry a single physical channel payload. The program code also includes a program code for sending a signaling to a UE indicating that physical time domain resources are assigned to a continuous symbol set in the virtual domain. Each symbol in the continuous symbol set can be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more continuous OFDM symbols. The program code also includes a program code for receiving or sending multiple OFDM symbol sets on physical time domain resources based on mapping.

[0015] Another aspect of the present disclosure is directed to a device for wireless communication at a base station. The device includes a processor, a memory coupled to the processor, and an instruction, which is stored in the memory and can be operated to cause the device to assign physical time domain resources to a continuous symbol set in a virtual domain when executed by the processor. The execution of the instruction also causes the device to map the physical time domain resources assigned to the continuous symbol set to multiple sets of one or more continuous OFDM symbols in the physical time domain. Each OFDM symbol set can be associated with a respective time slot in a plurality of time slots in the physical time domain. Multiple OFDM symbol sets can carry a single physical channel payload. The execution of the instruction also causes the device to send a signaling to the UE for indicating that the physical time domain resources are assigned to the continuous symbol set in the virtual domain. Each symbol in the continuous symbol set can be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more continuous OFDM symbols. The execution of the instruction also causes the device to receive or send multiple OFDM symbol sets on the physical time domain resources based on the mapping.

[0016] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, or processing systems as fully described with reference to and as illustrated by the accompanying drawings and description.

[0017] The foregoing has been quite extensively summarized according to the features and technical advantages of the examples of the present disclosure, so that the specific embodiments below are better understood. Additional features and advantages will be described. The disclosed concepts and specific examples can be easily utilized as the basis for modifying or designing other structures for the same purpose of performing the present disclosure. Such equivalent constructions do not deviate from the scope of protection of the appended claims. The characteristics of the disclosed concepts (both their organization and method of operation) together with the associated advantages will be better understood from the description below when considered in conjunction with the accompanying drawings. Each of the figures in the accompanying drawings is provided for the purpose of illustration and description, and is not intended to limit the limits of the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order that the features of the present disclosure may be understood in detail, a specific description may be made with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings illustrate only certain aspects of the present disclosure and are therefore not to be considered as limiting the scope of protection thereof, as the specification may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

[0020] Figure 2 is a block diagram conceptually illustrating an example of a base station communicating with a user equipment (UE) in a wireless communication network according to various aspects of the present disclosure.

[0021] Figure 3A is a schematic diagram illustrating fragmentation due to uplink / downlink modes according to aspects of the present disclosure.

[0022] Figure 3B is a schematic diagram illustrating fragmentation due to crossing a time slot boundary according to aspects of the present disclosure.

[0023] Figure 4A is a block diagram illustrating a demodulation reference signal multiplexed with physical channel resources in accordance with aspects of the present disclosure.

[0024] Figure 4B is a block diagram illustrating a demodulation reference signal multiplexed with physical channel resources in accordance with aspects of the present disclosure.

[0025] Figure 4C is a block diagram illustrating a demodulation reference signal multiplexed with physical channel resources in accordance with aspects of the present disclosure.

[0026] Figure 5is a block diagram illustrating virtual domains for assignment of resources in accordance with aspects of the present disclosure.

[0027] Fig. 6A is a block diagram illustrating frequency division multiplexing of demodulation reference signal (DMRS) symbols to generate an orthogonal frequency division multiplexing (OFDM) waveform in accordance with aspects of the present disclosure.

[0028] Figure 6B is a block diagram illustrating time division multiplexing of DMRS symbols to generate a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) waveform in accordance with aspects of the present disclosure.

[0029] Figure 7 is a block diagram illustrating an example of a wireless communication device that supports assigning communication resources to fragmented symbols in accordance with various aspects of the present disclosure.

[0030] Figure 8 is a block diagram illustrating an example of a wireless communication device that supports assigning communication resources to fragmented symbols in accordance with various aspects of the present disclosure.

[0031] Fig. 9 is a flow chart illustrating an example process, performed, for example, by a UE, for receiving an assignment of communication resources to fragmented symbols in accordance with various aspects of the present disclosure.

[0032] Fig.10 is a flow chart illustrating an example process, performed, for example, by a base station, for assigning communication resources to fragmented symbols in accordance with various aspects of the present disclosure. DETAILED DESCRIPTION

[0033] Various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be embodied in many different forms, and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. Instead, these aspects are provided so that the present disclosure will be thorough and complete, and the protection scope of the present disclosure will be fully conveyed to those skilled in the art. Based on teachings, it should be understood by those skilled in the art that the protection scope of the present disclosure is intended to cover any aspect of the present disclosure, whether independently or in combination with any other aspect of the present disclosure. For example, the device can be implemented or the method can be practiced using any number of aspects described. In addition, the protection scope of the present disclosure is intended to cover such a device or method, which is practiced using other structures, functions, or structures and functions of the various aspects of the present disclosure except those described herein, or other structures, functions, or structures and functions of the various aspects of the present disclosure different from those described herein. It should be understood that any aspect of the disclosed disclosure can be embodied by one or more elements of the claims.

[0034] Some aspects of telecommunication systems are now presented with reference to various devices and techniques. These devices and techniques will be described in the detailed description below and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0035] It should be noted that while various aspects may be described using terminology commonly associated with 5G and later wireless technologies, various aspects of the present disclosure may be applicable to communication systems based on other generations, such as and including 3G or 4G technologies.

[0036] As discussed, in some wireless communication systems, communication resources (e.g., uplink communication resources or downlink communication resources) can be assigned to orthogonal frequency division multiplexing (OFDM) symbols within a time division duplex (TDD) uplink / downlink (UL / DL) mode. In some examples, both the first OFDM symbol set and the second OFDM symbol set can be associated with an uplink transmission or a downlink transmission. In some such examples, the first OFDM symbol set and the second OFDM symbol set can be separated by a slot boundary or one or more OFDM symbols of different types based on the UL / DL mode. In such examples, each of the first OFDM symbol set and the second OFDM symbol set can be referred to as an OFDM symbol fragment or a fragmented resource.

[0037] In such a wireless communication system, due to the unequal length of each segment and the limitations specific to the discrete Fourier transform spread OFDM (DFT-S-OFDM) waveform, the existing demodulation reference signal (DMRS) pattern does not work well with fragmented resources. For example, a single OFDM symbol may not be used for the DFT-S waveform. In addition, each fragmented resource may be associated with downlink signaling. Therefore, sending multiple fragmented resources may increase the signaling overhead. Therefore, it may be desirable to merge the fragmented resources to create a larger set of communication resources. Still, due to one or more limitations, the conventional wireless communication system may not merge the fragmented resources to create a larger set of resources. In some such examples, when two OFDM symbol sets are separated by a slot boundary, the base station (e.g., gNB) may not merge the fragmented resources (e.g., OFDM symbol fragments) to create a larger set of resources. In such an example, the base station may not combine OFDM symbol segments to carry physical channel payloads (such as physical uplink shared channel (PUSCH) or physical uplink control channel (PUCCH) payloads) because the OFDM symbol allocation does not cross the time slot boundary. Instead, only OFDM symbols within one time slot can carry physical channel payloads.

[0038] According to various aspects of the present disclosure, the UE and the base station can each identify multiple OFDM symbol segments from the configured TDD mode and merge them into a larger OFDM symbol set in the virtual domain. In some examples, each OFDM symbol segment includes an OFDM symbol associated with the configured TDD mode or two or more continuous OFDM symbols. In some such examples, the OFDM symbol associated with each OFDM symbol segment can be an uplink symbol. In some other examples, the OFDM symbol associated with each OFDM symbol segment can be a downlink symbol. In some aspects, the base station or UE can be based on assigning physical channel time domain resources to continuous symbols in the virtual domain, and connect multiple OFDM symbol segments in a continuous manner in the virtual domain. For example, the base station can assign physical channel time domain resources to the virtual domain. The base station can then signal the physical channel time domain resource assignment to the UE. The UE and the base station can map each symbol of the continuous symbols in the virtual domain to the respective OFDM symbols in the respective OFDM symbol segments in the multiple OFDM symbol segments. Finally, the UE and the base station can respectively send or receive OFDM symbol fragments on the physical channel time domain resources based on the mapping.

[0039] According to further aspects of the present disclosure, a new DMRS pattern is introduced on each physical OFDM symbol. In addition, the same DMRS pattern is repeated across all physical OFDM symbols. For OFDM waveforms, the UE may frequency-division multiplex the DMRS with data or control information, such as uplink control information (UCI). For DFT-S-OFDM waveforms, the UE may time-division multiplex the DMRS with data or control information. In such latter examples, the time-division multiplexing may occur before transform precoding operations, such as DFT processing.

[0040] Certain aspects of the subject matter described in the present disclosure may be implemented to achieve one or more of the following potential advantages. In some aspects, a larger set of communication resources is generated based on mapping each symbol in consecutive symbols in a virtual domain to respective OFDM symbols in respective OFDM symbol segments in multiple OFDM symbol segments, and network overhead can be reduced by reducing the amount of downlink signaling required to receive or send OFDM symbol segments. Because a larger set of communication resources can be associated with a single downlink signal, the amount of downlink signaling can be reduced. In addition, by accommodating a single OFDM symbol in a DFT-S-OFDM waveform, the operation of DMRS is improved using a new DMRS pattern on each physical OFDM symbol.

[0041] Figure 1 1 is a schematic diagram showing a network 100 in which various aspects of the present disclosure can be practiced. The network 100 may be a 5G or NR network or some other wireless network, such as an LTE network. The wireless network 100 may include a number of BSs 110 (shown as BSs 110a, BSs 110b, BSs 110c, and BSs 110d) and other network entities. A BS is an entity that communicates with a user equipment (UE), and a BS may also be referred to as a base station, NR BS, Node B, gNB, 5G Node B (NB), access point, transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS or a BS subsystem serving this coverage area, depending on the context in which the term is used.

[0042] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the example shown, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "Node B", "5G NB", and "cell" may be used interchangeably.

[0043] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move according to the location of the mobile BS. In some aspects, the BSs may be interconnected to each other or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.) using any suitable transport network.

[0044] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown, a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0045] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0046] As an example, BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and core network 130 may exchange communications via backhaul links 132 (e.g., S1, etc.). Base stations 110 may communicate with each other directly or indirectly (e.g., through core network 130) through other backhaul links (e.g., X2, etc.).

[0047] The core network 130 may be an evolved packet core (EPC), which may include at least one mobility management entity (MME), at least one serving gateway (S-GW), and at least one packet data network (PDN) gateway (P-GW). The MME may be a control node that handles signaling between the UE 120 and the EPC. All user IP packets may be transmitted through the S-GW, which itself may be connected to the P-GW. The P-GW may provide IP address assignment and other functions. The P-GW may be connected to the IP services of the network operator. The operator's IP services may include the Internet, the intranet, the IP multimedia subsystem (IMS), and the packet switched (PS) streaming services.

[0048] The core network 130 may provide user authentication, access authorization, tracking, IP connectivity, and other access, routing, or mobility functions. One or more of the base stations 110 or access node controllers (ANCs) may interface with the core network 130 via a backhaul link 132 (e.g., S1, S2, etc.), and may perform radio configuration and scheduling for communications with the UE 120. In some configurations, the various functions of each access network entity or base station 110 may be distributed across various network devices (e.g., radio heads and access network controllers), or merged into a single network device (e.g., base station 110).

[0049] UE 120 (e.g., 120a, 120b, 120c) can be dispersed throughout the wireless network 100, and each UE can be stationary or mobile. UE can also be referred to as an access terminal, terminal, mobile station, subscriber unit, station, etc. UE can be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet device, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biosensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio unit), a vehicle-mounted component or sensor, a smart meter / sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless medium or a wired medium.

[0050] One or more UEs 120 may establish a protocol data unit (PDU) session for a network slice. In some cases, the UE 120 may select a network slice based on an application or a subscription service. By enabling different network slices for different applications or subscription services, the UE 120 may improve its resource utilization in the wireless network 100 while also meeting the performance specifications of the respective applications of the UE 120. In some cases, the network slice used by the UE 120 may be provided by an AMF (AMF) associated with one or both of the base station 110 or the core network 130. Figure 1 In addition, session management of the network slice can be performed by the access and mobility management function (AMF).

[0051] UE 120 may include a fragment assignment module 140. For simplicity, only one UE 120d is shown as including a fragment assignment module 140. The fragment assignment module 140 may receive from the base station 110 a signaling indicating that resources in the physical time domain are assigned to a set of continuous symbols in the virtual domain. Each symbol in the set of continuous symbols in the virtual domain may be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more continuous OFDM symbols in the physical time domain. In addition, each set of OFDM symbols may be associated with a respective time slot in a plurality of time slots in the physical time domain. In addition, a plurality of OFDM symbol sets may carry a single physical channel payload. The fragment assignment module 140 may also map physical time domain resources to a plurality of OFDM symbol sets based on assigning physical time domain resources to a plurality of continuous symbol sets in the virtual domain. The fragment assignment module 140 may also receive or send a plurality of OFDM symbol sets on physical time domain resources based on mapping.

[0052] The base station 110 may include a fragment assignment module 138. The fragment assignment module 138 may assign physical time domain resources to a set of consecutive symbols in the virtual domain. The fragment assignment module 138 may also map the physical time domain resources assigned to the set of consecutive symbols to multiple sets of one or more consecutive OFDM symbols in the physical time domain. Each set of OFDM symbols may be associated with a respective time slot in a plurality of time slots in the physical time domain. Multiple sets of OFDM symbols may carry a single physical channel payload. The fragment assignment module 138 may also send a signaling to the UE 120 indicating that the physical time domain resources are assigned to a set of consecutive symbols in the virtual domain. Each symbol in the set of consecutive symbols may be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more consecutive OFDM symbols. The fragment assignment module 138 may also receive or send multiple sets of OFDM symbols on the physical time domain resources based on the mapping.

[0053] Some UEs may be considered as machine type communication (MTC) UEs or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc. that can communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide, for example, a connection to a network or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as customer premises equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120 (such as a processor component, a memory component, etc.).

[0054] Typically, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific radio access technology (RAT) and can operate on one or more frequencies. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, frequency channel, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0055] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more side link channels (e.g., without using base station 110 as an intermediary to communicate with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocol (e.g., which may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, etc.), mesh network, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, or other operations described elsewhere herein as performed by base station 110. For example, base station 110 may configure UE 120 via downlink control information (DCI), radio resource control (RRC) signaling, medium access control-control element (MAC-CE), or via system information (e.g., system information block (SIB)).

[0056] Figure 2 A block diagram showing a design 200 of a base station 110 and a UE 120 is shown. Base station 110 may be Figure 1 UE 120 may be one of the base stations in Figure 1 Base station 110 may be equipped with T antennas 234a through 234t, and UE 120 may be equipped with R antennas 252a through 252r, where in general T≧1 and R≧1.

[0057] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for the UE based at least in part on a channel quality indicator (CQI) received from each UE, process (e.g., encode and modulate) the data for the UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. Reducing the MCS reduces throughput but improves the reliability of transmission. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, or reference symbols (if applicable), and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in more detail below, synchronization signals may be generated using position coding to convey additional information.

[0058] At the UE 120, antennas 252a to 252r may receive downlink signals from the base station 110 or other base stations, and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. The MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. The receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for the UE 120 to the data sink 260, and provide decoded control information and system information to the controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in a housing.

[0059] On the uplink, at the UE 120, a transmit processor 264 may receive data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.), and process the data and control information. The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 (if applicable), further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 254, detected by the MIMO detector 236 (if applicable), and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide decoded data to a data sink 239 and decoded control information to a controller / processor 240. The base station 110 may include a communication unit 244 and transmit to the core network 130 via the communication unit 244. The core network 130 may include a communication unit 294, a controller / processor 290, and a memory 292.

[0060] Figure 2The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, or any other component may perform one or more techniques associated with the assignment of uplink resources as described in more detail elsewhere. For example, Figure 2 The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, or any other component may perform or direct the operations as described, for example Fig. 9 and Fig.10 Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. Scheduler 246 may schedule UEs for data transmission on the downlink or uplink.

[0061] In a wireless communication system, communication resources may be segmented or fragmented in the time domain. In the present application, communication resources may be uplink communication resources (such as uplink OFDM symbols) or downlink communication resources (such as downlink OFDM symbols). As described, communication resources may be based on slot boundaries or may be required due to the presence of one or more OFDM symbols in a TDD UL / DL mode.

[0062] Figure 3A is a schematic diagram illustrating fragmentation due to uplink / downlink modes according to aspects of the present disclosure. Figure 3A An uplink / downlink pattern is shown across three time slots (n, n+1, and n+2). For ease of explanation, Figure 3A The example is for a fragmented uplink OFDM symbol. Still, Figure 3A The examples and other aspects of the disclosed content given may also be directed to fragmented downlink OFDM symbols. In such an example, the fragmented downlink OFDM symbols may be concatenated into a set of continuous downlink symbols in a virtual downlink domain, and time domain resources may be assigned to a set of continuous downlink symbols in the virtual downlink domain.

[0063] exist Figure 3AIn the embodiment, the symbol indicated by 'D' represents the downlink OFDM symbol, the symbol indicated by 'U' represents the uplink symbol, and the symbol indicated by 'X' represents the flexible symbol which can be dynamically configured, and a gap can be provided for transitioning between the downlink and uplink OFDM symbols. The downlink OFDM symbol can be determined by the semi-static uplink / downlink TDD mode configuration or by the dynamic slot format indicator (SFI), which is an example of downlink control information (DCI) for dynamically indicating the flexible OFDM symbol as a downlink or uplink OFDM symbol. The semi-static uplink / downlink TDD mode configuration can set some OFDM symbols as flexible symbols, and later change the flexible symbols to UL symbols or DL ​​symbols using the dynamic SFI. As Figure 3A As shown in , no more than three uplink symbols may be consecutive in each slot. Therefore, only three symbols may be available to carry physical channel payloads, such as PUSCH or PUCCH payloads.

[0064] Figure 3B is a schematic diagram showing fragmentation due to crossing a time slot boundary according to various aspects of the present disclosure. For ease of explanation, Figure 3B The example is for a fragmented uplink OFDM symbol. Still, Figure 3B The examples and other aspects of the disclosure presented may be directed to fragmented downlink OFDM symbols. Figure 3B In the example of , the time slot boundaries are static and can be determined based on the frame structure and the time slot structure. Figure 3B Two time slots are shown: time slot one and time slot two. Although the two uplink symbols are consecutive, one of the uplink symbols is in time slot one and the other uplink symbol is in time slot two. Because the communication resource assignment may not cross the time slot boundary, the two uplink time slots can be treated as if they are fragmented, so that each uplink time slot can be a single uplink time slot. In addition, the base station (e.g., gNB) may not merge the fragments to create a larger uplink resource set. Therefore, the UE sends two small transport blocks across two uplink time slots instead of a single transport block. Each transport block can be associated with downlink control signaling. Therefore, more signaling occurs in the case of two smaller transport blocks compared to a single larger transport block.

[0065] In some examples, DMRS can be an example of a pilot signal (including a Zadoff-Chu sequence in the frequency domain) sent between a base station and a UE and also between two UEs to facilitate demodulation of data. DMRS can be used by a wireless communication device to estimate a channel for demodulation of an associated physical channel. DMRS can be device-specific and therefore can directly correspond to data targeted to a specific UE. DMRS can be sent on demand and can be configured using different modes.

[0066] In the case of fragmented symbols, a dedicated DMRS pattern may be specified for each segment with a different length (eg, number of symbols).In conventional DMRS pattern design, for a given set of consecutive OFDM symbols for PUCCH or PUSCH, a subset of OFDM symbols is dedicated to DMRS.

[0067] Figure 4A is a block diagram illustrating a demodulation reference signal multiplexed with a physical channel resource according to various aspects of the present disclosure. For ease of explanation, Figure 4A The example is for fragmented uplink communications. Still, Figure 4A The examples and other aspects of the disclosed content presented may also be directed to downlink communications. Figure 4A In the example, symbols 1, 4, 8, and 12 are assigned to DMRS, while the other ten OFDM symbols are allocated to physical channels, such as one or both of PUCCH or PUSCH. In this example, there are four DMRS symbols within fourteen symbols, and each DMRS symbol can be an example of a symbol segment (e.g., an OFDM symbol segment).

[0068] Figure 4B is a block diagram illustrating a demodulation reference signal multiplexed with a physical channel resource according to various aspects of the present disclosure. For ease of explanation, Figure 4B The example is for fragmented uplink communications. Still, Figure 4B The examples and other aspects of the disclosed content presented may also be directed to downlink communications. Figure 4B In the example, the middle symbol is assigned to DMRS, and the other two OFDM symbols are allocated to physical channels, such as one or both of PUCCH or PUSCH. In this example, one DMRS symbol exists within three symbols, and the DMRS symbol can be an example of a symbol segment.

[0069] Figure 4C is a block diagram illustrating a demodulation reference signal multiplexed with a physical channel resource according to various aspects of the present disclosure. For ease of explanation, Figure 4C The example is for fragmented uplink communications. Still, Figure 4CThe examples and other aspects of the disclosed content presented may also be directed to downlink communications. Figure 4C In the example, two symbols are assigned to DMRS, while other OFDM symbols are allocated to physical channels, such as one or both of PUCCH or PUSCH. In this example, two DMRS symbols exist within eight symbols, and each DMRS symbol can be an example of a symbol segment.

[0070] like Figure 4A , Figure 4B and Figure 4C As shown in , fragmentation or segmentation complicates conventional DMRS pattern design due to the unequal length of each segment. Figure 4A Fourteen symbol fragments are shown, Figure 4B Three symbol fragments are shown, and Figure 4C Eight symbol segments are shown, each with a different number of DMRS symbols.The DMRS pattern design is expected to accommodate different physical channel durations, which may also accommodate different segment sizes.

[0071] For a single OFDM symbol ("Orphan OS"), the conventional DMRS pattern design is not compatible with the DFT-S-OFDM waveform. That is, a single OFDM symbol may not be used for the DFT-S waveform. Therefore, the DMRS pattern design may be expected to accommodate a single OFDM symbol in the DFT-S-OFDM waveform.

[0072] According to various aspects of the present disclosure, the UE and the base station may merge the various fragmented OFDM symbols into a larger OFDM symbol set in the virtual domain. In some aspects, each of the base station and the UE may concatenate the available symbols together in a continuous manner in the virtual domain. The base station may then perform time domain resource allocation (e.g., physical channel time domain resource allocation) in the virtual domain. In some examples, the base station may ignore slot boundaries, flexible symbols, and downlink symbols or uplink symbols when allocating resources. In such an example, the UE may map symbols from the virtual domain to physical symbols based on the configured TDD mode.

[0073] Figure 5 is a block diagram illustrating a virtual domain for assignment of uplink resources according to aspects of the present disclosure. For ease of explanation, Figure 5 The example is for uplink communication. Still, Figure 5 The examples and other aspects of the disclosed content may also be directed to downlink communications. Figure 5As shown in , the uplink symbol (U) in the physical domain 510 is mapped to the virtual domain 520. The fragmented uplink symbol includes a subset of the UL symbols separated by the downlink symbol. The fragment includes the first two uplink symbols 512, the second two uplink symbols 514, the third two uplink symbols 516, and the fourth two uplink symbols 518. The fragments 512, 514, 516, and 518 are mapped from the physical domain 510 to the virtual domain 520. When mapped back to the physical domain, the first virtual symbol is mapped to the sixth physical symbol, the second virtual symbol is mapped to the seventh physical symbol, the third virtual symbol is mapped to the 13th physical symbol, and so on.

[0074] exist Figure 5 In the example of , the base station schedules two packets, a first packet 522 and a second packet 524. Based on the modulation and coding scheme (MCS) configured for this example, each packet may include four symbols. Therefore, the first two symbols 512 and the second two symbols 514 are mapped to the first packet 522. The third two symbols 516 and the fourth two symbols 518 are mapped to the second packet 524.

[0075] According to aspects of the present disclosure, a new DMRS is introduced on each OFDM symbol. In addition, the same DMRS pattern can be repeated across all OFDM symbols. For OFDM waveforms, the UE frequency-division multiplexes the reference signal with data or control information (such as UCI). For DFT-S-OFDM waveforms, the UE time-division multiplexes the DMRS with data or control information. Time division multiplexing occurs before transform precoding operations (such as DFT processing).

[0076] Fig. 6A is a block diagram illustrating frequency division multiplexing of DMRS symbols to generate an OFDM waveform according to aspects of the present disclosure. For ease of explanation, Fig. 6A The example is for uplink communication. Still, Fig. 6A The examples and other aspects of the disclosed content may also be directed to downlink communications. Fig. 6A , a single OFDM symbol 600 includes multiple frequency tones 610, 612, 614, 616, ... n. The first frequency tone 610 is mapped to the DMRS, while the next three tones 612, 614, 616 are mapped to the UCI. The mapping pattern repeats within the symbol 600, and also repeats on every other symbol in the virtual and physical uplink domains. Although the UCI is shown, the PUSCH or a combination of both can be multiplexed with the DMRS. After multiplexing, the UE generates the OFDM waveform by mapping the frequency-division multiplexed information to the correct tone locations and performing an inverse fast Fourier transform (IFFT) process.

[0077] Figure 6Bis a block diagram illustrating time division multiplexing of DMRS symbols to generate a DFT-S-OFDM waveform according to aspects of the present disclosure. For ease of explanation, Figure 6B The example is for uplink communication. Still, Figure 6B The examples and other aspects of the disclosed content can also be directed to downlink communications. The DFT-S-OFDM waveform maintains a low peak-to-average power ratio (PAPR). If the UE inserts DMRS in the frequency domain when generating the DFT-S-OFDM waveform, the low PAPR disappears. Therefore, in Figure 6B In the process, the UE combines the DMRS symbol with the PUCCH or PUSCH symbol (through Figure 6B 6) are time-division multiplexed with the UCI carried by the PUCCH shown in the figure to generate a DFT-S-OFDM waveform. The first three symbols 650, 652, 654 are mapped to the UCI, while the fourth symbol 656 is mapped to the DMRS. After multiplexing in the time domain, the UE performs a transform precoding operation (transfer DFT processing) to convert the information into the frequency domain. Once in the frequency domain, the UE generates a DFT-S-OFDM waveform by mapping the output of the DFT block to the correct tone position and performing IFFT processing.

[0078] Figure 7 is a block diagram illustrating an example of a wireless communication device 700 that supports assigning communication resources to fragmented symbols according to various aspects of the present disclosure. The device 700 may be a reference Figure 1 Examples of various aspects of the UE 120 described herein. The wireless communication device 700 may include a receiver 710, a communication manager 705, a transmitter 720, an assignment component 730, and a mapping component 750, which may communicate with each other (e.g., via one or more buses). In some examples, the wireless communication device 700 is configured to perform the following reference Fig. 9 The operations of process 900 are described.

[0079] In some examples, the wireless communication device 700 may include a chip, chipset, package, or device that includes at least one processor and at least one modem (e.g., a 5G modem or other cellular modem). In some examples, the communication manager 705 or its subcomponents may be separate and distinct components. In some examples, at least some components of the communication manager 705 are at least partially implemented as software stored in a memory. For example, a portion of one or more of the components of the communication manager 705 may be implemented as non-transitory code that is executable by a processor to perform the functions or operations of the respective components.

[0080] The receiver 710 may receive one or more of a reference signal (e.g., a periodically configured CSI-RS, an aperiodically configured CSI-RS, or a multi-beam specific reference signal), a synchronization signal (e.g., SSB), control information, and data information (such as in the form of a packet) from one or more other wireless communication devices via various channels including a control channel (e.g., a physical downlink control channel (PDCCH)) and a data channel (e.g., a physical downlink shared channel (PDSCH)). The other wireless communication devices may include, but are not limited to, reference signals. Figure 1 A base station 110 is described.

[0081] The received information may be passed to other components of the device 700. The receiver 710 may be a reference Figure 2 Receiver 710 may include a set of radio frequency (RF) chains coupled to a set of antennas, or otherwise utilize RF chains of a set of antennas (eg, the set of antennas may be referenced). Figure 2 Examples of various aspects of antennas 252a to 252r described herein).

[0082] The transmitter 720 may transmit signals generated by the communication manager 705 or other components of the wireless communication device 700. In some examples, the transmitter 720 may be co-located with the receiver 710 in a transceiver. The transmitter 720 may be a reference Figure 2 The transmitter 720 may be coupled to a set of antennas or otherwise utilize a set of antennas (eg, the set of antennas may be referenced). Figure 2 252a through 252r), the group of antennas may be antenna elements shared with the receiver 710. In some examples, the transmitter 720 is configured to send control information in the PUCCH and to send data in the PUSCH.

[0083] The communication manager 705 may be a reference Figure 2Examples of various aspects of the controller / processor 280 described. The communication manager 705 may include an assignment component 730 and a mapping component 750. In some examples, working together with the receiver 710, the assignment component 730 may assign physical time domain resources to a set of consecutive symbols in the virtual domain. Working together with the receiver 710 and the assignment component 730, the mapping component 750 maps the physical time domain resources assigned to the set of consecutive symbols to multiple sets of one or more consecutive OFDM symbols in the physical time domain. Each set of OFDM symbols may be associated with a respective time slot in a plurality of time slots in the physical time domain. In addition, a plurality of sets of OFDM symbols may carry a single physical channel payload. A transmitter 720 working together with one or more of the assignment component 730 and the mapping component 750 may send a signaling to the UE indicating that the physical time domain resources are assigned to a set of consecutive symbols in the virtual domain. Each symbol in the set of consecutive symbols is associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more consecutive OFDM symbols. The transmitter 720 or the receiver 710, working in conjunction with one or more of the assigning component 730 and the mapping component 750, respectively transmits or receives multiple sets of OFDM symbols on physical time domain resources based on the mapping.

[0084] Figure 8 8 is a block diagram illustrating an example of a wireless communication device 800 that supports assigning resources to fragmented symbols according to various aspects of the present disclosure. The device 800 may be a reference Figure 1 Examples of various aspects of the base station 110 described herein. The wireless communication device 800 may include a receiver 810, a communication manager 805, a transmitter 820, an assignment component 850, and a mapping component 860, which may communicate with each other (e.g., via one or more buses). In some examples, the wireless communication device 800 is configured to perform the following references: Fig.10 The operations of process 1000 are described.

[0085] In some examples, the wireless communication device 800 may include a chip, chipset, package, or device that includes at least one processor and at least one modem (e.g., a 5G modem or other cellular modem). In some examples, the communication manager 805 or its subcomponents may be separate and distinct components. In some examples, at least some components of the communication manager 805 are at least partially implemented as software stored in a memory. For example, a portion of one or more of the components of the communication manager 805 may be implemented as non-transitory code that is executable by a processor to perform the functions or operations of the respective components.

[0086] Receiver 810 may receive one or more of reference signals, control information, and data information (such as in the form of packets) from one or more other wireless communication devices via various channels including control channels (e.g., PDCCH) and data channels (e.g., PDSCH). Other wireless communication devices may include, but are not limited to, reference signals. Figure 1 UE 120 is described.

[0087] The received information may be passed to other components of the device 800. The receiver 810 may be a reference Figure 2 Receiver 810 may include a set of RF chains coupled to a set of antennas, or otherwise utilize RF chains of a set of antennas (eg, the set of antennas may be referenced). Figure 2 Examples of various aspects of antennas 234a to 234r described herein).

[0088] The transmitter 820 may transmit signals generated by the communication manager 805 or other components of the wireless communication device 800. In some examples, the transmitter 820 may be co-located with the receiver 810 in a transceiver. The transmitter 820 may be a reference Figure 2 The transmitter 820 may be coupled to a set of antennas or otherwise utilize a set of antennas (eg, the set of antennas may be referenced). Figure 2 234a through 234r), the group of antennas may be antenna elements shared with the receiver 810. In some examples, the transmitter 820 is configured to send control information in the PDCCH and to send data in the PDSCH.

[0089] The communication manager 805 may be a reference Figure 2Examples of various aspects of the controller / processor 240 described. The communication manager 805 may include an assignment component 850 and a mapping component 860. In one implementation, working together with the receiver 810, the assignment component 850 may receive from a base station a signaling indicating that resources in the physical time domain are assigned to a continuous symbol set in the virtual domain. Each symbol in the continuous symbol set in the virtual domain may be associated with a respective OFDM symbol in a respective one of a plurality of sets (e.g., OFDM symbol fragments) of one or more continuous OFDM symbols in the physical time domain. In addition, each OFDM symbol set may be associated with a respective time slot in a plurality of time slots in the physical time domain. In addition, a plurality of OFDM symbol sets carry a single physical channel payload. In this implementation, working together with the receiver 810 and the assignment component 850, the mapping component 860 may map physical time domain resources to a plurality of OFDM symbol sets based on assigning physical time domain resources to a continuous symbol set in the virtual domain. Working in conjunction with one or more of the assigning component 850 and the mapping component 860, the transmitter 820 or the receiver 810 can respectively send or receive multiple sets of OFDM symbols on physical time-domain resources based on the mapping.

[0090] Fig. 9 900 is a flow chart illustrating an example process 900 performed, for example, by a UE, in accordance with various aspects of the present disclosure, the process 900 supporting assignment of fragmented resources. According to various aspects of the present disclosure, the example process 900 is an example of receiving an assignment of fragmented OFDM symbols for a physical channel transmission. The physical channel transmission may be a downlink transmission or an uplink transmission. The operations of the process 900 may be described by reference to Figure 1 The operations of process 900 may be implemented by a UE (such as UE 120) or a component thereof as described herein. Figure 7 The UE may be implemented by one or more of the communication manager 705, the transmitter 720, the receiver 710, the assignment component 730, or the mapping component 750 described below. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the operations or functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the operations or functions described below.

[0091] like Fig. 9As shown in , process 900 starts at box 902 by receiving signaling from a base station for indicating that resources in the physical time domain are assigned to a set of consecutive symbols in the virtual domain. Each symbol in the set of consecutive symbols in the virtual domain can be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more consecutive OFDM symbols in the physical time domain. Each OFDM symbol set can be an example of an OFDM symbol fragment. In addition, each OFDM symbol set can be associated with a respective time slot in a plurality of time slots in the physical time domain. In addition, multiple OFDM symbol sets can carry a single physical channel payload. At box 904, the process maps the physical time domain resources to the number of OFDM symbol sets based on assigning the physical time domain resources to the set of consecutive symbols in the virtual domain. At box 906, the process receives or sends multiple OFDM symbol sets on the physical time domain resources based on the mapping.

[0092] Fig.10 1 is a flow chart illustrating an example process 1000, performed, for example, by a base station, that supports assignment of fragmented resources in accordance with various aspects of the present disclosure. The example process 1000 is an example of assigning fragmented uplink OFDM symbols for physical channel transmissions. The physical channel transmissions may be downlink transmissions or uplink transmissions. The operations of the process 1000 may be described by reference to Figure 1 The operations of process 1000 may be implemented by a base station (such as base station 110) or components thereof as described. Figure 8 The UE may be implemented by one or more of the communication manager 805, the transmitter 820, the receiver 810, the assignment component or the mapping component 860 described below. In some examples, the UE may execute a set of instructions to control the functional elements of the UE to perform the operations or functions described below. Additionally or alternatively, the UE may use dedicated hardware to perform various aspects of the operations or functions described below.

[0093] like Fig.10As shown in , process 1000 starts in box 1002 by assigning physical time domain resources to a set of consecutive symbols in a virtual domain. At box 1004, the process maps the physical time domain resources assigned to the set of consecutive symbols to multiple sets of one or more consecutive OFDM symbols in the physical time domain. Each set of OFDM symbols can be associated with a respective time slot in a plurality of time slots in the physical time domain. Multiple sets of OFDM symbols can carry a single physical channel payload. Each set of OFDM symbols can be an example of an OFDM symbol fragment. At box 1006, the process sends a signaling to the UE indicating that the physical time domain resources are assigned to a set of consecutive symbols in the virtual domain. Each symbol in the set of consecutive symbols can be associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more consecutive OFDM symbols. At box 1008, the process receives or sends multiple sets of OFDM symbols on the physical time domain resources based on the mapping.

[0094] The following provides an overview of some aspects of the disclosure:

[0095] Aspect 1. A method for wireless communication by a user equipment (UE), comprising: receiving signaling from a base station for indicating that resources in a physical time domain are assigned to a set of consecutive symbols in a virtual domain, each symbol in the set of consecutive symbols in the virtual domain is associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more consecutive OFDM symbols in the physical time domain, each OFDM symbol set is associated with a respective time slot in a plurality of time slots in the physical time domain, and the plurality of OFDM symbol sets carry a single physical channel payload; mapping the physical time domain resources to a plurality of OFDM symbol sets based on assigning the physical time domain resources to the set of consecutive symbols in the virtual domain; and receiving or sending the plurality of OFDM symbol sets on the physical time domain resources based on the mapping.

[0096] Aspect 2. A method according to aspect 1, wherein: the UE sends multiple OFDM symbol sets; and the method further comprises concatenating the multiple OFDM symbol sets into consecutive symbol sets in the virtual domain.

[0097] Aspect 3. A method according to any one of Aspects 1 to 2, wherein: each OFDM symbol associated with each OFDM symbol set in a plurality of OFDM symbol sets includes a DMRS; and the respective DMRSs have the same DMRS pattern.

[0098] Aspect 4. A method according to Aspect 3, wherein: the UE sends multiple OFDM symbol sets; and the method also includes: for each OFDM symbol set in the multiple OFDM symbol sets, frequency division multiplexing the respective DMRS and data or control information; and sending the respective frequency division multiplexed DMRS and data or control information as an OFDM waveform.

[0099] Aspect 5. A method according to Aspect 3, wherein: the UE sends multiple OFDM symbol sets; and the method also includes: for each OFDM symbol set in the multiple OFDM symbol sets, time-division multiplexing the respective DMRS and data or control information; applying a transform precoding operation to the time-division multiplexed DMRS and data or control information, the transform precoding operation including a DFT operation; and sending the respective frequency-division multiplexed DMRS and data or control information as a DFT-S-OFDM waveform.

[0100] Aspect 6. A method according to any one of Aspects 1 to 5, wherein: the multiple OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set; and the first OFDM symbol set is separated from the second fragmented OFDM symbol set by a time slot boundary.

[0101] Aspect 7. A method according to any one of Aspects 1 to 5, wherein: the UE sends multiple OFDM symbol sets; and the multiple OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, and the first OFDM symbol set is separated from the second OFDM symbol set by one or more downlink symbols or one or more flexible symbols.

[0102] Aspect 8. According to any one of Aspects 1 to 5, wherein: the UE receives multiple OFDM symbol sets; and the multiple OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, and the first OFDM symbol set is separated from the second OFDM symbol set by one or more uplink symbols or one or more flexible symbols.

[0103] Aspect 9. A method for wireless communication by a base station, comprising: assigning physical time domain resources to a set of consecutive symbols in a virtual domain; mapping the physical time domain resources assigned to the set of consecutive symbols to multiple sets of one or more consecutive OFDM symbols in the physical time domain, each set of OFDM symbols being associated with a respective time slot in a plurality of time slots in the physical time domain, the plurality of sets of OFDM symbols carrying a single physical channel payload; sending signaling to a UE indicating that the physical time domain resources are assigned to a set of consecutive symbols in the virtual domain, each symbol in the set of consecutive symbols being associated with a respective OFDM symbol in a respective one of a plurality of sets of one or more consecutive OFDM symbols; and receiving or sending multiple sets of OFDM symbols on the physical time domain resources based on the mapping.

[0104] Aspect 10. The method according to aspect 9, wherein: each OFDM symbol associated with each OFDM symbol set in the plurality of OFDM symbol sets comprises a DMRS; and the respective DMRSs have the same DMRS pattern.

[0105] Aspect 11. A method according to any one of Aspects 9 to 10, wherein: the multiple OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set; and the first OFDM symbol set is separated from the second OFDM symbol set by a time slot boundary.

[0106] Aspect 12. A method according to any one of Aspects 9 to 10, wherein: a base station sends multiple OFDM symbol sets; and the multiple OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, and the first OFDM symbol set is separated from the second OFDM symbol set by one or more uplink symbols or one or more flexible symbols.

[0107] Aspect 13. A method according to any one of Aspects 9 to 10, wherein: a base station receives multiple OFDM symbol sets; and the multiple OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, the first OFDM symbol set being separated from the second OFDM symbol set by one or more downlink symbols or one or more flexible symbols.

[0108] The above disclosure provides illustration and description, but is not intended to be exhaustive or to limit the various aspects to the precise forms disclosed. Modifications and variations may be made based on the above disclosure, or may be obtained from practice of the various aspects.

[0109] As used, the term "component" is intended to be broadly interpreted as hardware, firmware, or a combination of hardware and software. As used, a processor is implemented using hardware, firmware, or a combination of hardware and software.

[0110] Some aspects are described in conjunction with a threshold. As used, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0111] It will be apparent that the described systems or methods may be implemented in various forms of hardware, firmware, or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems or methods is not limited in the various aspects. Therefore, the operation and behavior of the systems or methods are described without reference to specific software code - it should be understood that software and hardware can be designed to implement the systems or methods based at least in part on the description.

[0112] Although the combination of features is set forth in the claims or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically recorded in the claims or disclosed in the specification. Although each dependent claim listed below can directly depend on only one claim, the disclosure of various aspects includes each dependent claim of each other claim combined in the claim set. The phrase "at least one of" related to the item list refers to any combination of those items, including a single member. For example, "at least one of a, b or c" is intended to cover a, b, c, ab, ac, bc and abc, and any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc and ccc, or any other ordering of a, b and c).

[0113] The elements, actions or instructions used should not be interpreted as being critical or essential, unless explicitly described as such. In addition, as used, the articles "a" and "an" are intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used, the terms "set" and "group" are intended to include one or more items (e.g., related items, irrelevant items, combinations of related items and irrelevant items, etc.), and can be used interchangeably with "one or more". In the case of intending only one item, the phrase "only one" or similar terms are used. In addition, as used, the terms "has", "have", "having" etc. are intended to be open terms. Further, the phrase "based on" is intended to mean "based at least in part on", unless explicitly stated otherwise.

[0114] As used, the use of "or" is intended to be interpreted in an inclusive sense unless expressly indicated otherwise. For example, "a or b" may include only a, only b, or a combination of a and b. As used, terms referring to "at least one of" or "one or more of" a list of items refer to any combination of those items, including single members. For example, "at least one of a, b, or c" is intended to cover the following examples: only a, only b, only c, a combination of a and b, a combination of a and c, a combination of b and c, and a combination of a and b and c.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: receiving signaling from a base station indicating that a plurality of sets of orthogonal frequency division multiplexing (OFDM) symbols associated with a physical time domain symbol pattern are assigned to consecutive sets of virtual domain symbols in a virtual domain, two or more OFDM symbol sets of the plurality of OFDM symbol sets are non-contiguous relative to each other in the physical time domain symbol pattern, the plurality of OFDM symbol sets have the same symbol type, the symbol type being an uplink symbol type or a downlink symbol type, The physical time domain symbol pattern includes a set of continuous physical time domain symbols spanning multiple time slots, wherein the set of continuous physical time domain symbols includes one or more uplink symbols and one or more downlink symbols. each virtual domain symbol in the set of consecutive virtual domain symbols is assigned a respective OFDM symbol in a respective one of the plurality of sets of OFDM symbols, Each set of OFDM symbols is associated with a respective subset of consecutive physical time domain symbols in the set of consecutive physical time domain symbols within a slot in the plurality of slots in the physical time domain, the plurality of sets of OFDM symbols carrying a single physical channel payload; as well as The multiple sets of OFDM symbols are received or sent on the physical time domain resources based on mapping physical time domain resources from the physical time domain symbol pattern to the consecutive sets of virtual domain symbols in accordance with assigning the multiple sets of OFDM symbols to the consecutive sets of virtual domain symbols.

2. The method according to claim 1, wherein: The UE transmits the multiple OFDM symbol sets; and The method also includes concatenating the plurality of OFDM symbol sets into the consecutive virtual domain symbol sets.

3. The method according to claim 1, wherein: Each OFDM symbol associated with each OFDM symbol set of the plurality of OFDM symbol sets comprises a demodulation reference signal (DMRS); and The respective DMRSs have the same DMRS pattern.

4. The method according to claim 3, wherein: The UE transmits the multiple OFDM symbol sets; and The method further comprises: For each OFDM symbol set in the multiple OFDM symbol sets, frequency division multiplexing the respective DMRS and data or control information; and The respective frequency-division-multiplexed DMRS and the data or the control information are transmitted as an OFDM waveform.

5. The method according to claim 3, wherein: The UE transmits the multiple OFDM symbol sets; and The method further comprises: For each OFDM symbol set in the multiple OFDM symbol sets, time division multiplexing the respective DMRS and data or control information; Applying a transform precoding operation to the time-division multiplexed DMRS and the data or the control information, the transform precoding operation comprising a DFT operation; and The respective frequency division multiplexed DMRS and the data or the control information are transmitted as a discrete Fourier transform spread OFDM (DFT-S-OFDM) waveform.

6. The method according to claim 1, wherein: The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set; and The first set of OFDM symbols is separated from the second set of OFDM symbols by a slot boundary.

7. The method according to claim 1, wherein: The UE transmits the multiple OFDM symbol sets; and The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, the first OFDM symbol set being separated from the second OFDM symbol set by one or more downlink symbols and / or one or more flexible symbols.

8. The method according to claim 1, wherein: The UE receives the multiple OFDM symbol sets; and The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, the first OFDM symbol set being separated from the second OFDM symbol set by one or more uplink symbols and / or one or more flexible symbols.

9. A user equipment (UE) for wireless communication, comprising: one or more processors; one or more memories coupled to the one or more processors; as well as Instructions, which are stored in the one or more memories and, when executed by the one or more processors, are operable to cause the UE to perform the following operations: receiving signaling from a base station indicating that a plurality of sets of orthogonal frequency division multiplexing (OFDM) symbols associated with a physical time domain symbol pattern are assigned to consecutive sets of virtual domain symbols in a virtual domain, two or more OFDM symbol sets of the plurality of OFDM symbol sets are non-contiguous relative to each other in the physical time domain symbol pattern, the plurality of OFDM symbol sets have the same symbol type, the symbol type being an uplink symbol type or a downlink symbol type, The physical time domain symbol pattern includes a set of continuous physical time domain symbols spanning multiple time slots, wherein the set of continuous physical time domain symbols includes one or more uplink symbols and one or more downlink symbols. each virtual domain symbol in the set of consecutive virtual domain symbols is assigned a respective OFDM symbol in a respective one of the plurality of sets of OFDM symbols, Each OFDM symbol set is associated with a respective subset of continuous physical time domain symbols in the continuous physical time domain symbol set within a time slot in the multiple time slots in the physical time domain, the multiple OFDM symbol sets carrying a single physical channel payload; and the multiple OFDM symbol sets are received or sent on the physical time domain resources based on mapping physical time domain resources from the physical time domain symbol pattern to the continuous virtual domain symbol sets according to assigning the multiple OFDM symbol sets to the continuous virtual domain symbol sets.

10. The UE according to claim 9, wherein: The UE transmits the multiple OFDM symbol sets; and Execution of the instructions further causes the UE to concatenate the multiple OFDM symbol sets into the consecutive virtual domain symbol sets.

11. The UE according to claim 9, wherein: Each OFDM symbol associated with each OFDM symbol set of the plurality of OFDM symbol sets comprises a demodulation reference signal (DMRS); and The respective DMRSs have the same DMRS pattern.

12. The UE according to claim 11, wherein: The UE transmits the multiple OFDM symbol sets; and Execution of the instruction further causes the UE to perform the following operations: For each OFDM symbol set in the multiple OFDM symbol sets, frequency division multiplexing the respective DMRS and data or control information; and The respective frequency-division-multiplexed DMRS and the data or the control information are transmitted as an OFDM waveform.

13. The UE according to claim 11, wherein: The UE transmits the multiple OFDM symbol sets; and Execution of the instruction further causes the UE to perform the following operations: For each OFDM symbol set in the multiple OFDM symbol sets, time division multiplexing the respective DMRS and data or control information; Applying a transform precoding operation to the time-division multiplexed DMRS and the data or the control information, the transform precoding operation comprising a DFT operation; and The respective frequency division multiplexed DMRS and the data or the control information are transmitted as a discrete Fourier transform spread OFDM (DFT-S-OFDM) waveform.

14. The UE according to claim 9, wherein: The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set; and The first set of OFDM symbols is separated from the second set of OFDM symbols by a slot boundary.

15. The UE according to claim 9, wherein: The UE transmits the multiple OFDM symbol sets; and The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, the first OFDM symbol set being separated from the second OFDM symbol set by one or more downlink symbols and / or one or more flexible symbols.

16. The UE according to claim 9, wherein: The UE receives the multiple OFDM symbol sets; and The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, the first OFDM symbol set being separated from the second OFDM symbol set by one or more uplink symbols and / or one or more flexible symbols.

17. A method for wireless communication by a base station, comprising: assigning a plurality of sets of orthogonal frequency division multiplexing (OFDM) symbols associated with a physical time domain symbol pattern to consecutive sets of virtual domain symbols in the virtual domain; two or more OFDM symbol sets of the plurality of OFDM symbol sets are non-contiguous relative to each other in the physical time domain symbol pattern, the plurality of OFDM symbol sets have the same symbol type, the symbol type being an uplink symbol type or a downlink symbol type, The physical time domain symbol pattern includes a set of continuous physical time domain symbols spanning multiple time slots, wherein the set of continuous physical time domain symbols includes one or more uplink symbols and one or more downlink symbols. mapping physical time domain resources to the consecutive sets of virtual domain symbols based on assigning the multiple sets of OFDM symbols to the consecutive sets of virtual domain symbols, the multiple sets of OFDM symbols carrying a single physical channel payload; Sending to a user equipment (UE) signaling indicating that the physical time domain resources are assigned to the set of consecutive virtual domain symbols, each symbol in the set of consecutive virtual domain symbols being associated with a respective OFDM symbol in a respective one of the plurality of sets of one or more consecutive OFDM symbols; and The multiple OFDM symbol sets are received or sent on the physical time domain resources according to the mapping.

18. The method of claim 17, wherein: Each OFDM symbol associated with each OFDM symbol set of the plurality of OFDM symbol sets comprises a demodulation reference signal (DMRS); and The respective DMRSs have the same DMRS pattern.

19. The method of claim 17, wherein: The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set; and The first set of OFDM symbols is separated from the second set of OFDM symbols by a slot boundary.

20. The method of claim 17, wherein: The base station transmits the multiple OFDM symbol sets; and The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, the first OFDM symbol set being separated from the second OFDM symbol set by one or more uplink symbols and / or one or more flexible symbols.

21. The method of claim 17, wherein: The base station receives the plurality of OFDM symbol sets; and The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, the first OFDM symbol set being separated from the second OFDM symbol set by one or more downlink symbols and / or one or more flexible symbols.

22. A network node for wireless communication, comprising: one or more processors; one or more memories coupled to the one or more processors; as well as Instructions, which are stored in the one or more memories and, when executed by the one or more processors, are operable to cause the network node to: assigning a plurality of sets of orthogonal frequency division multiplexing (OFDM) symbols associated with a physical time domain symbol pattern to consecutive sets of virtual domain symbols in the virtual domain; two or more OFDM symbol sets of the plurality of OFDM symbol sets are non-contiguous relative to each other in the physical time domain symbol pattern, the plurality of OFDM symbol sets have the same symbol type, the symbol type being an uplink symbol type or a downlink symbol type, The physical time domain symbol pattern includes a set of continuous physical time domain symbols spanning multiple time slots, wherein the set of continuous physical time domain symbols includes one or more uplink symbols and one or more downlink symbols. mapping physical time domain resources to the consecutive sets of virtual domain symbols based on assigning the multiple sets of OFDM symbols to the consecutive sets of virtual domain symbols, the multiple sets of OFDM symbols carrying a single physical channel payload; Sending to a user equipment (UE) signaling indicating that the physical time domain resources are assigned to the set of consecutive virtual domain symbols, each symbol in the set of consecutive virtual domain symbols being associated with a respective OFDM symbol in a respective one of the plurality of sets of one or more consecutive OFDM symbols; and The multiple OFDM symbol sets are received or sent on the physical time domain resources according to the mapping.

23. The network node according to claim 22, wherein: Each OFDM symbol associated with each OFDM symbol set of the plurality of OFDM symbol sets comprises a demodulation reference signal (DMRS); and The respective DMRSs have the same DMRS pattern.

24. The network node of claim 22, wherein: The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set; and The first set of OFDM symbols is separated from the second set of OFDM symbols by a slot boundary.

25. The network node of claim 22, wherein: The network node transmits the plurality of sets of OFDM symbols; and The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, the first OFDM symbol set being separated from the second OFDM symbol set by one or more uplink symbols and / or one or more flexible symbols.

26. The network node of claim 22, wherein: The network node receives the plurality of sets of OFDM symbols; and The two or more OFDM symbol sets include a first OFDM symbol set and a second OFDM symbol set, the first OFDM symbol set being separated from the second OFDM symbol set by one or more downlink symbols and / or one or more flexible symbols.

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