Subband usage in wireless communications
By employing subband non-overlapping full duplex at both gNB and UE sides, the method addresses coverage and capacity issues in TDD systems, enhancing wireless communication efficiency through optimized resource allocation and simultaneous uplink-downlink transmissions.
Patent Information
- Application Number
- PCT/CN2024/116455
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-09-03
- Publication Date
- 2025-07-31
AI Technical Summary
In wireless communication systems using time division duplex (TDD), the allocation of limited time duration for uplink transmission leads to reduced coverage, increased latency, and reduced capacity, which can be enhanced through full duplex communication, particularly with subband non-overlapping full duplex at the gNB and UE sides.
The method involves determining and utilizing subbands for simultaneous uplink and downlink transmissions by a user device or network device based on their capabilities, optimizing resource allocation and communication channels within these subbands.
This approach enhances coverage, reduces latency, and increases capacity by allowing simultaneous uplink and downlink transmissions within defined subbands, optimizing resource utilization in TDD systems.
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Figure CN2024116455_31072025_PF_FP_ABST
Abstract
Description
SUBBAND USAGE IN WIRELESS COMMUNICATIONSTECHNICAL FIELD
[0001] This document is directed generally to use of subbands in wireless communications.BACKGROUND
[0002] In wireless communication systems, the time domain resource may be split between downlink (DL) and uplink (UL) in time division duplex (TDD) . Allocation of a limited time duration for uplink transmission in TDD may result in reduced coverage, increased latency and reduced capacity. As a possible enhancement on such limitations using TDD, full duplex communication (i.e., the simultaneous communication of downlink and uplink transmissions) may be performed. In particular implementations, subband non-overlapping full duplex at the gNB side within a TDD band may be performed. In such implementations, subband non-overlapping full duplex is supported on a TDD carrier, and an UL subband is introduced within downlink and / or flexible symbols. Ways to further improve upon the above-mentioned limitations provided by the TDD may be achieved using subband non-overlapping full duplex at the user equipment (UE) -side is supported. As such, ways to optimize for transmission and reception using subband non-overlapping full duplex supported on a TDD carrier may be desirable.SUMMARY
[0003] This document relates to methods, systems, apparatuses and devices for wireless communication. In some implementations, a method for wireless communication includes: determining, by a user device, resources for at least one first subband based on at least one second subband supported by a capability of the user device; and communicating, by the user device, at least one channel or signal in at least the resources for the at least one first subband.
[0004] In some other implementations, a method for wireless communication includes: determining, by a network device, resources for at least one first subband based on at least one second subband supported by a capability of a user device; and communicating, by the network device, at least one channel or signal in at least the resources for the at least one first subband.
[0005] In some other implementations, a device, such as a network device, is disclosed. The device may include one or more processors and one or more memories, wherein the one or more processors are configured to read computer code from the one or more memories to implement any of the methods above.
[0006] In yet some other implementations, a computer program product is disclosed. The computer program product may include a non-transitory computer-readable program medium with computer code stored thereupon, the computer code, when executed by one or more processors, causing the one or more processors to implement any of the methods above.
[0007] The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.BRIEF DESCRIPTION OF THE DRAWINGS
[0008] FIG. 1 shows a block diagram of an example of a wireless communication system.
[0009] FIG. 2 shows a flow chart of an example method of wireless communication.
[0010] FIG. 3 shows a flow chart of another example method of wireless communication.
[0011] FIG. 4 shows a diagram of an example of a subband non-overlapping full duplex (SBFD) operation with an uplink (UL) subband.
[0012] FIG. 5 shows diagram of an example SBFD operation associated with multiple user device bandwidth parts (BWPs) .
[0013] FIG. 6 shows a diagram illustrating an example of resource determination of an UL subband or UL usable physical resource blocks (PRBs) of a user device.
[0014] FIG. 7 shows a diagram illustrating another example of resource determination of an UL subband or UL usable PRBs of a user device.
[0015] FIG. 8 shows a diagram illustrating another example of resource determination of an UL subband or UL usable PRBs of a user device.
[0016] FIG. 9 shows a diagram of an example configuration of a UE-side SBFD operation associated with multiple user device BWPs.
[0017] FIG. 10 shows a diagram of an example configuration for a SBFD operation, where the subbands extend over the same frame structure, and the subbands have the same number of transition points at the same locations.
[0018] FIG. 11 shows a diagram of another example configuration for a SBFD operation, where the subbands extend over different frame structure, and the subbands have the same number of transition points at the same locations.
[0019] FIG. 12 shows a diagram of another example configuration for a SBFD operation, where the subbands extend over the same frame structure, and have the same number of transition points, but the transition points are located in different symbols.
[0020] FIG. 13 shows a diagram of another example configuration for a SBFD operation, where the subbands extend over different frame structures, have the same number of transition points, but the transition points are located in different symbols.
[0021] FIG. 14 shows a diagram of another example configuration for a SBFD operation, where the subbands extend over the same frame structure, and have different numbers of transition points and are not aligned.
[0022] FIG. 15 shows a diagram of another example configuration for a SBFD operation, where the subbands extend over different frame structures, and have different numbers of transition points and are not aligned.
[0023] FIG. 16 shows a diagram of an example configuration for a simultaneous UL transmission and a downlink (DL) reception that are each restricted to within one subband.
[0024] FIG. 17 shows a diagram of an example configuration for a simultaneous UL transmission and a downlink (DL) that are each not restricted to within one subband.DETAILED DESCRIPTION
[0025] The present description describes various embodiments of systems, apparatuses, devices, and methods for wireless communications related to subband usage.
[0026] Fig. 1 shows a diagram of an example wireless communication system 100 including a plurality of communication nodes (or just nodes) that are configured to wirelessly communicate with each other. In general, the communication nodes include at least one user device 102 and at least one network device 104. The example wireless communication system 100 in Fig. 1 is shown as including two user devices 102, including a first user device 102 (1) and a second user device 102 (2) , and one device 104. However, various other examples of the wireless communication system 100 that include any of various combinations of one or more user devices 102 and / or one or more network devices 104 may be possible.
[0027] In general, a user device as described herein, such as the user device 102, may include a single electronic device or apparatus, or multiple (e.g., a network of) electronic devices or apparatuses, capable of communicating wirelessly over a network. A user device may comprise or otherwise be referred to as a user terminal, a user terminal device, or a user equipment (UE) . Additionally, a user device may be or include, but not limited to, a mobile device (such as a mobile phone, a smart phone, a smart watch, a tablet, a laptop computer, vehicle or other vessel (human, motor, or engine-powered, such as an automobile, a plane, a train, a ship, or a bicycle as non-limiting examples) or a fixed or stationary device, (such as a desktop computer or other computing device that is not ordinarily moved for long periods of time, such as appliances, other relatively heavy devices including Internet of things (IoT) , or computing devices used in commercial or industrial environments, as non-limiting examples) . In various embodiments, a user device 102 may include transceiver circuitry 106 coupled to an antenna 108 to effect wireless communication with the network device 104. The transceiver circuitry 106 may also be coupled to a processor 110, which may also be coupled to a memory 112 or other storage device. The memory 112 may store therein instructions or code that, when read and executed by the processor 110, cause the processor 110 to implement various ones of the methods described herein.
[0028] Additionally, in general, a network device as described herein, such as the network device 104, may include a single electronic device or apparatus, or multiple (e.g., a network of) electronic devices or apparatuses, and may comprise one or more wireless access nodes, base stations, or other wireless network access points capable of communicating wirelessly over a network with one or more user devices and / or with one or more other network devices 104. For example, the network device 104 may comprise a 4G LTE base station, a 5G NR base station, a 5G central-unit base station, a 5G distributed-unit base station, a next generation Node B (gNB) , an enhanced Node B (eNB) , or other similar or next-generation (e.g., 6G) base stations, in various embodiments. A network device 104 may include transceiver circuitry 114 coupled to an antenna 116, which may include an antenna tower 118 in various approaches, to effect wireless communication with the user device 102 or another network device 104. The transceiver circuitry 114 may also be coupled to one or more processors 120, which may also be coupled to a memory 122 or other storage device. The memory 122 may store therein instructions or code that, when read and executed by the processor 120, cause the processor 120 to implement one or more of the methods described herein.
[0029] In various embodiments, two communication nodes in the wireless system 100-such as a user device 102 and a network device 104, two user devices 102 without a network device 104, or two network devices 104 without a user device 102-may be configured to wirelessly communicate with each other in or over a mobile network and / or a wireless access network according to one or more standards and / or specifications. In general, the standards and / or specifications may define the rules or procedures under which the communication nodes can wirelessly communicate, which, in various embodiments, may include those for communicating in millimeter (mm) -Wave bands, and / or with multi-antenna schemes and beamforming functions. In addition or alternatively, the standards and / or specifications are those that define a radio access technology and / or a cellular technology, such as Fourth Generation (4G) Long Term Evolution (LTE) , Fifth Generation (5G) New Radio (NR) , or New Radio Unlicensed (NR-U) , as non-limiting examples.
[0030] Additionally, in the wireless system 100, the communication nodes are configured to wirelessly communicate signals between each other. In general, a communication in the wireless system 100 between two communication nodes can be or include a transmission or a reception, and is generally both simultaneously, depending on the perspective of a particular node in the communication. For example, for a given communication between a first node and a second node where the first node is transmitting a signal to the second node and the second node is receiving the signal from the first node, the first node may be referred to as a source or transmitting node or device, the second node may be referred to as a destination or receiving node or device, and the communication may be considered a transmission for the first node and a reception for the second node. Of course, since communication nodes in a wireless system 100 can both send and receive signals, a single communication node may be both a transmitting / source node and a receiving / destination node simultaneously or switch between being a source / transmitting node and a destination / receiving node.
[0031] Also, particular signals can be characterized or defined as either an uplink (UL) signal, a downlink (DL) signal, or a sidelink (SL) signal. An uplink signal is a signal transmitted from a user device 102 to a network device 104. A downlink signal is a signal transmitted from a network device 104 to a user device 102. A sidelink signal is a signal transmitted from a one user device 102 to another user device 102, or a signal transmitted from one network device 104 to another network device 104. Also, for sidelink transmissions, a first / source user device 102 directly transmits a sidelink signal to a second / destination user device 102 without any forwarding of the sidelink signal to a network device 104.
[0032] Additionally, signals communicated between communication nodes in the system 100 may be characterized or defined as a data signal or a control signal. In general, a data signal is a signal that includes or carries data, such multimedia data (e.g., voice and / or image data) , and a control signal is a signal that carries control information that configures the communication nodes in certain ways in order to communicate with each other, or otherwise controls how the communication nodes communicate data signals with each other. Also, certain signals may be defined or characterized by combinations of data / control and uplink / downlink / sidelink, including uplink control signals, uplink data signals, downlink control signals, downlink data signals, sidelink control signals, and sidelink data signals.
[0033] For at least some specifications, such as 5G NR, data and control signals are transmitted and / or carried on physical channels. Generally, a physical channel corresponds to a set of time-frequency resources used for transmission of a signal. Different types of physical channels may be used to transmit different types of signals. For example, physical data channels (or just data channels) , also herein called traffic channels, are used to transmit data signals, and physical control channels (or just control channels) are used to transmit control signals. Example types of traffic channels (or physical data channels) include, but are not limited to, a physical downlink shared channel (PDSCH) used to communicate downlink data signals, a physical uplink shared channel (PUSCH) used to communicate uplink data signals, and a physical sidelink shared channel (PSSCH) used to communicate sidelink data signals. In addition, example types of physical control channels include, but are not limited to, a physical downlink control channel (PDCCH) used to communicate downlink control signals, a physical uplink control channel (PUCCH) used to communicate uplink control signals, and a physical sidelink control channel (PSCCH) used to communicate sidelink control signals. As used herein for simplicity, unless specified otherwise, a particular type of physical channel is also used to refer to a signal that is transmitted on that particular type of physical channel, and / or a transmission on that particular type of transmission. As an example illustration, a PDSCH refers to the physical downlink shared channel itself, a downlink data signal transmitted on the PDSCH, or a downlink data transmission. Accordingly, a communication node transmitting or receiving a PDSCH means that the communication node is transmitting or receiving a signal on a PDSCH.
[0034] Additionally, for at least some specifications, such as 5G NR, and / or for at least some types of control signals, a control signal that a communication node transmits may include control information comprising the information necessary to enable transmission of one or more data signals between communication nodes, and / or to schedule one or more data channels (or one or more transmissions on data channels) . For example, such control information may include the information necessary for proper reception, decoding, and demodulation of a data signals received on physical data channels during a data transmission, and / or for uplink scheduling grants that inform the user device about the resources and transport format to use for uplink data transmissions. In some embodiments, the control information includes downlink control information (DCI) that is transmitted in the downlink direction from a network device 104 to a user device 102. In other embodiments, the control information includes uplink control information (UCI) that is transmitted in the uplink direction from a user device 102 to a network device 104, or sidelink control information (SCI) that is transmitted in the sidelink direction from one user device 102 (1) to another user device 102 (2) .
[0035] Additionally, for some implementations for wireless communication, the network device 104 and the user device 102 may use time resources and frequency resources, or time-frequency resources, to communicate channels or signals. A time resource may include one or more units of time. A unit of time may include a slot or a symbol, such as an orthogonal frequency-division multiplexing (OFDM) symbol. A frequency resource may include a range or a band of frequencies. In particular embodiments, a set of time-frequency resources may extend over one time unit in the time domain and an active bandwidth part (BWP) in the frequency domain. Also, a given set of time-frequency resources may have a certain type for wireless communication, including a downlink (DL) type, an uplink (UL) type, or a flexible (F) type. A given set of time-frequency resources having the DL type means that those time-frequency resources are designated or configured for one or more DL transmissions. Also, a given set of time-frequency resources having the UL type means that those time-frequency resources are designated or configured for one or more UL transmissions. Also, as used herein, the term “flexible” as used for time and / or frequency resources, refers to that the user device 102 may not make any assumptions as to the uplink or downlink transmission direction for that time or frequency resource. The user device 102 may transmit in the UL direction or receive in the DL direction on or in a given flexible time or frequency resource, depending on scheduling or a configuration, such as determined by the network device 104. Accordingly, resources in a downlink slot or symbol (D) may be used for downlink communication, resources in an uplink slot or symbol (U) may be used for uplink communication, and resources in a flexible (F) slot or symbol may be changed or set to downlink (DL) or uplink (UL) and / or dynamically indicated as DL or UL.
[0036] Fig. 2 is a flow chart of an example method 200 for wireless communication related to subband usage. At block 202 a user device 102 determines resources for at least one first subband based on at least one second subband supported by a capability of the user device 102. At block 204, the user device 102 communicates (transmits and / or receives) at least one channel or signal in at least the resources for the at least one first subband.
[0037] Fig. 3 is a flow chart of another example 300 for wireless communication related to subband usage. At block 302, a network device 104 determines resources for at least one first subband based on at least one second subband supported by a capability of a user device 102. At block 304, the network device 104 communicates (transmits and / or receives) at least one channel or signal in at least the resources for the at least one first subband.
[0038] As described in further detail below, each of the at least one first subband may be an UL subband or a DL subband, in any of various implementations. Also, in at least some implementations, each of the at least one first subband may include usable physical resource blocks (PRBs) , such as UL PRBs or DL PRBs. Further, the user device 102 may use the first subband to communicate, from the perspective of the user device.
[0039] Additionally, with respect to the at least one second subband, in general, different user devices 102 may have different capabilities that support different maximum subband bandwidths. Additionally, in any of various implementations, the location of the subband (e.g., a central frequency of the subband, and / or as defined by an upper bound and a lower bound) for a user device 102 may be fixed or variable, which may depend on the hardware and / or software design of the user device 102. In this context, the second subband as used in the method 200 and / or the method 300 or otherwise described herein, is a subband supported by a user deice 102 with user device or UE-specific capability. The supported, second subband included as part of the capability (or capability information) of the user device 102 may be reported by the user device 102 to the network device 104. In at least some implementations, the capability information associated with the supported, second subband may include a size of the supported, second subband and / or a location of the supported, second subband.
[0040] In some implementations of the method 200 and / or the method 300, the resources are determined further based on at least one of: a cell-specific subband or a bandwidth part (BWP) .
[0041] In addition or alternatively, in some implementations of the method 200 and / or the method 300, the BWP includes an active BWP, and the resources are determined based on an intersection of the cell-specific subband, the active BWP in subband full duplex (SBFD) symbols, and the at least one second subband supported by the capability of the user device 102.
[0042] In addition or alternatively, in some implementations of the method 200 and / or the method 300, a size of the first subband is determined by the second subband supported by the capability of the user device 102, and a starting resource block (RB) of the resources is determined by a first valid RB at an intersection between the cell-specific subband and the active BWP in SBFD symbols.
[0043] In addition or alternatively, in some implementations of the method 200 and / or the method 300, the BWP includes an active BWP, and the resources are determined based on an intersection of the cell-specific subband, the active BWP in subband full duplex in (SBFD) symbols, and at least one user device-specific UL subband configuration.
[0044] In addition or alternatively, in some implementations of the method 200 and / or the method 300, the at least one first subband includes a plurality of first subbands, and each of the first subbands is further determined by a respective one of a plurality of independent cell-specific subband configurations.
[0045] In addition or alternatively, in some implementations of the method 200 and / or the method 300, the at least one first subband includes a plurality of first subbands, and the first subbands are determined by a joint cell-specific subband configuration. In some of these implementations, the joint cell-specific subband configuration includes a starting resource block (RB) of a subband with a lowest index of the plurality of first subbands and a RB offset used to determine a next subband relative to a previous subband.
[0046] In addition or alternatively, in some implementations of the method 200 and / or the method 300, a restriction on transition points for all of a plurality of subbands in an active bandwidth part (BWP) of the user device 102 includes: the plurality of subbands have a same number of transition points as each other; or the plurality of subbands have independent numbers of transition points. In some of these implementations, the plurality of subbands have the same number of transition points, and the transition points are aligned. In some other of these implementations, the plurality of subbands have the same number of transition points, and the transition points are not aligned. In still some other of these implementations, the plurality of subbands have independent numbers of transition points, at least two of the independent numbers are different from each other, and the transition points are not aligned.
[0047] In addition or alternatively, in some implementations of the method 200 and / or the method 300, the communicating the at least one channel or signal comprises: simultaneously performing, by the user device, an uplink (UL) transmission and a downlink (DL) reception according to a restriction. In some of these implementations, the restriction includes at least one of: the DL reception is restricted to one DL subband and / or the UL transmission is restricted to one UL subband; the DL reception and the UL transmission are for different types of traffic; the DL reception and the UL transmission are different channels or signals of the at least one channel or signal; the DL reception and / or the UL transmission are not for measurement; or at least one predefined or configured beam is used for the DL reception and the UL transmission. In addition or alternatively, in some of these implementations, the UL transmission and the DL reception include at least one of: a dynamically scheduled DL reception and a semi-statically configured UL transmission, a semi-statically configured DL reception and a dynamically scheduled UL transmission, a semi-statically configured DL reception and a semi-statically configured UL transmission, a dynamically scheduled DL reception and a dynamically scheduled UL transmission, a synchronization signal block (SSB) and a dynamically scheduled or configured UL transmission, or a dynamically scheduled or semi-statically configured DL reception and a valid random access channel occasion (RO) .
[0048] In addition or alternatively, in some implementations of the method 200 and / or the method 300, the user device 102 supports both network-side subband full duplex (SBFD) and user device-side SBFD. In some of these implementations, the user device 102 determines at least one of the network-side SBFD and the user device-side SBFD according to a semi-static configuration. In addition or alternatively, in some of these implementations, the user device 102 dynamically switches between the network-side SBFD and the user-device-side SBFD, in response to a downlink control information (DCI) , a medium access control control element (MAC CE) , or results of a measurement.
[0049] Other methods and / or other implementations of the method 200 and / or the method 300 are possible, including but not limited to those that combine one or more aspects from each of two or more of the methods 200 and 300 and / or those that include fewer than all of the aspects for an above recited implementation of the method 200 and / or 300.
[0050] Further details of actions performed by communication nodes in the wireless communication system 100, any or all of which may be implemented in any of various implementations of the method 200, the method 300, and / or other methods, are now described.
[0051] In some implementations of the wireless communication system 100, the time domain resource is split between downlink and uplink in time division duplex (TDD) . Allocation of a limited time duration for the uplink in TDD may result in reduced coverage, increased latency and / or reduced capacity. Communication using full duplex (i.e., the simultaneous existence of downlink and uplink communication) may provide enhancements over the limitations of TDD. In particular implementations, subband non-overlapping full duplex at the network device side within a TDD band may be employed. In such implementations, the subband non-overlapping full duplex (SBFD) is supported on a TDD carrier, and an uplink (UL) subband is introduced within downlink and / or flexible symbols. In addition or alternatively, in some implementations, subband non-overlapping full duplex at the user device side (also referred to herein as UE-side SBFD) is supported. The present description describes ways to optimally determine the resources for a subband and optimally perform transmission and reception where subband non-overlapping full duplex is supported on a TDD carrier.
[0052] Additionally, in some implementations, to communicate using subband non-overlapping full duplex (SBFD) , one TDD carrier to perform SBFD and an UL subband may be prioritized. In at least some of these implementations, the UL subband is configured on the downlink (D) and / or flexible (F) slots and / or symbols with consecutive frequency resources.
[0053] Fig. 4 shows a diagram of an example of an SBFD operation with an UL subband. As shown in Fig. 4, an UL subband is configured within some of the downlink (D) and flexible (F) symbols / slots to achieve SBFD, and the DL subband (s) are located on each side of the UL subband. In some implementations, though not shown in Fig. 4, a gap or guard band may be located between the UL subband and a DL subband. Also, as used herein, an UL subband is a subband in which an UL channel or signal is communicated, and a DL subband is a subband in which a DL channel or signal is communicated.
[0054] Also, as used herein unless expressly described otherwise, the term “communicate” refers to transmitting and / or receiving. Whether a given communication is a transmission or a reception depends on the perspective of the communication node involved. For example, a user device 102 communicating an UL signal includes the user device 102 transmitting the UL signal, and a user device 102 communicating a DL signal includes the user device 102 receiving the DL signal. Similarly, the network device 104 communicating an UL signal includes the network device 104 receiving the UL signal, and the network device 104 communicating a DL signal includes the network device 104 transmitting the DL signal.
[0055] In addition or alternatively, in some implementations, user device side (also called UE-side) SBFD is supported and / or multiple UL subbands are supported for wireless communication between a user device 102 and a network device 104. In some of these implementations, the user device 102 and / or the network device 104 may determine resources of the subband (s) , including one or more UL subbands and / or one or more DL subbands, of the user device 102 that are supported. For example, the resources of the subband (s) may be determined based on at least one of cell-specific subband configuration (e.g., at least one cell-specific UL subband configuration and / or at least one cell-specific DL subband configuration) , a bandwidth part (BWP) (e.g., an UL BWP or a DL BWP) , and / or the one or more subbands (e.g., one or more UL subbands and / or one or more DL subbands) that the user device 102 supports. In some implementations where multiple or a plurality of subbands are supported, the resources of the multiple subbands are determined by independent cell-specific configurations, each configuration for a respective one of the multiple subbands. In other implementations where multiple or a plurality of subbands are supported, the resources of the multiple subbands are determined by a joint configuration for the multiple subbands. In addition or alternatively, in implementations where multiple subbands are supported, a restriction on transition points may be the same or different among the multiple subbands. In some of these implementations, the multiple subbands may have the same frame structure or different frame structures.
[0056] In addition or alternatively, in implementations where UE-side SBFD is supported, a collision between overlapping DL reception and UL transmission resources may be absent, or may be present with certain restrictions or under certain conditions.
[0057] In addition or alternatively, in some implementations for network device-side SBFD (also called herein network-side SBFD of gNB-side SBFD) , from the perspective of the network device 104, the frequency location of the subband (s) (e.g., one or more DL subbands and / or one or more UL subbands) is cell-specific (i.e., particular to a cell) and kept the same among different symbols. As used herein, a cell-specific subband is a subband that is configured or defined by and / or from the view / perspective of the network device (e.g., gNB) 104. In this context, a cell-specific subband is, or is regarded as, a subband that can be supported by the network deice (e.g., gNB) 104 based on a capability of the network device (e.g., gNB) 104, regardless of whether or not the user device 102 supports SBFD. In addition or alternatively, in some implementations, there are only one UL subband and up to two DL subbands for an SBFD operation in an SBFD symbol within a TDD carrier. In addition or alternatively, in some implementations, from the perspective of the user device 102, the frequency location of the subband (s) (e.g., one or more DL subbands and / or one or more UL subbands) is determined by the user device 102 specifically. For example, subband frequency resources within an active bandwidth part (BWP) included and / or are referred to herein as usable physical resource blocks (PRB) . Specifically, UL subband frequency resources within an active UL BWP include and / or are called UL usable PRBs, and DL subband (s) frequency resources within an active DL BWP include and / or are called DL usable PRBs. Also, usable PRBs may be determined or defined as an intersection between a cell-specific subband and an active BWP within SBFD symbols. For example, UL usable PRBs are determined or defined as an intersection between a cell-specific UL subband and an active UL BWP in SBFD symbols. Also, DL usable PRBs are determined or defined as an intersection between cell-specific DL subband (s) and active DL BWP in SBFD symbols.
[0058] Fig. 5 shows diagram of an example SBFD operation associated with multiple user device BWPs. As shown in Fig. 5, a ‘DUD’ pattern (two DL subbands are located on each side of an UL subband) is derived by a first user device 102 (UE1) , a ‘UD’ pattern is derived by a second user device 102 (UE2) , and a ‘DU’ pattern is derived by a third user device 102 (UE3) .
[0059] In addition or alternatively, in implementations where UE-side SBFD is supported by a user device 102, the resources of the subband (s) of the user device 102 can be determined by at least one of: a cell-specific subband configuration (e.g., a cell-specific UL subband configuration or a cell-specific DL subband configuration) , a BWP (e.g., an UL BWP or a DL BWP) , or the UE-supported subband (s) (e.g. one or more UL subbands and / or one or more DL subbands) supported by the user device 102.
[0060] In addition or alternatively, for a UE-side SBFD operation or a duplex (according to at least some wireless technology) , the resources of the subband (s) or usable PRBs of a user device 102 may be determined by at least one of: a cell-specific subband configuration, an active BWP, or the UE-supported subbands supported by the user device 102.
[0061] In some implementations of UE-side SBFD operation, the resources of a subband (e.g., an UL subband or a DL subband) or usable PRBs (e.g., UL usable PRBs or DL usable PRBs) of a user device 102 is determined as an intersection of a cell-specific subband (e.g., a cell-specific UL subband or a cell-specific DL subband) , an active BWP (e.g., an active UL BWP or an active DL BWP) in SBFD symbols, and a UE-specific subband (e.g., a UE-specific UL subband or a UE-specific DL subband) . In some of these implementations, different user devices 102 may have different capabilities to support different maximum subband bandwidths. In such implementations, the location of a subband of a given one of the user devices 102 may be fixed or variable, which may depend on the hardware design of the user device 102.
[0062] In addition, in some of these implementations of a UE-side SBFD operation, the resources of a subband or usable PRBs of a user device 102 is determined as an intersection of a cell-specific subband, an active BWP in SBFD symbols and a UE-specific subband comprising both location and a number of PRBs. To illustrate as an example, Fig. 6 shows a diagram illustrating an example of resource determination of an UL subband or UL usable PRBs of a user device 102. As shown in Fig. 6, an UL subband or UL usable PRBs of a user device 102 is derived by or determined as an intersection of a cell-specific UL subband, an active UL BWP in SBFD symbols, and a UE-specific UL subband. In some of these implementations, the UE-specific UL subband includes both a location (e.g., starting resource block (RB) ) and a number of PRBs. In addition or alternatively, in some of these implementations, the location (e.g., starting RB) and the number of PRBs of the UE-specific UL subband are reported by the user device 102, such as to the network device 104. In addition or alternatively, in some of these implementations, the location (e.g., starting RB) and the number of PRBs of the UE-specific UL subband are configured by the network device (e.g., gNB) 104 based on a corresponding capability reported by the user device 102.
[0063] In addition, in some other of these implementations of a UE-side SBFD operation, the resources of subband or UL usable PRBs of a user device 102 are determined as an intersection of a cell-specific subband, an active BWP in SBFD symbols, and a UE-specific subband comprising a number of PRBs. In some of these implementations, the location of the subband or usable PRBs of the user device 102 is determined by a predefined rule or a radio resource control (RRC) configuration. To illustrate as an example, Fig. 7 shows a diagram illustrating another example of resource determination of an UL subband or UL usable PRBs of a user device 102. As shown in Fig. 7, an UL subband or UL usable PRBs of a user device 102 is derived by, or determined as, an intersection of a cell-specific UL subband, an active UL BWP in SBFD symbols, and a UE-specific UL subband, where the UE-specific UL subband comprises a number of PRBs. In some of these implementations, the number of PRBs of the UE-specific UL subband is reported by the user device 102, such as to the network device 104. In addition or alternatively, in some of these implementations, the number of PRBs of the UE-specific UL subband is configured by the network device (e.g., gNB) 104, such as based on a corresponding capability reported by the user device 102. In addition or alternatively, in some of these implementations, the location of the subband or usable PRBs of the user device 102 may be determined by a predefined rule. For example, the predefined rule may specify that the location of the subband starts from the first valid RB of the intersection between the cell-specific subband and the active BWP in SBFD symbols. As another example, the predefined rule may specify that the location ends at the last valid RB of the intersection between the cell-specific subband and the active BWP in SBFD symbols, or in the middle of the intersection between the cell-specific subband and the active BWP in SBFD symbols with a center frequency aligned with the BWP. As another example, an RRC configuration may include configuring the location of the subband or usable PRBs of the user device 102, e.g., configuring a starting RB. In some of these implementations, the starting RB may be configured to be, or configured to be based on, a lowest (valid) RB of the cell-specific subband or BWP, or an intersection between the lowest (valid) RB of the cell-specific subband and the lowest (valid) RB of the active BWP in SBFD symbols.
[0064] In some other implementations of a UE-side SBFD operation, the resources of a subband or usable PRBs of a user device 102 are determined as an intersection of a cell-specific subband (e.g., a cell-specific UL subband or a cell-specific DL subband) , an active BWP (e.g., an active UL BWP or an active DL BWP) in SBFD symbols, and a UE-specific subband configuration (e.g., a UE-specific UL subband configuration or a UE-specific DL subband configuration) . In some of these implementations, the location of the subband or usable PRBs of the user device 102 is determined by a RRC configuration. To illustrate as an example, Fig. 8 shows a diagram illustrating another example of resource determination of an UL subband or UL usable PRBs of a user device 102. As shown in Fig. 8, the UL subband or UL usable PRBs of a user device 102 is derived by, or determined as, an intersection of a cell-specific UL subband, an active UL BWP in SBFD symbols, and a UE-specific UL subband configuration. In some of these implementations, the UE-specific UL subband configuration comprises a location (e.g., a starting RB) and a number of PRBs. In particular of these implementations, the starting RB is configured to be, or is configured to be based on, a lowest (valid) RB of the cell-specific UL subband or UL BWP, or an intersection between the lowest (valid) RB of the cell-specific UL subband and the lowest (valid) RB of the active UL BWP in SBFD symbols.
[0065] Accordingly, in some implementations of a UE-side SBFD operation (and / or duplex operation according to some wireless technologies) , the resources of the subband (s) or usable PRBs of a user device 102 may be determined by at least one of: a cell-specific subband configuration, an active BWP, or UE-supported subband (s) . In doing so, UL and / or DL subbands for different user devices 102 with different capabilities may be independently derived, which in turn may allow for support of different maximum subband bandwidths. This, in turn, may provide more efficient system performance when utilizing gNB-SBFD and / or UE-side SBFD.
[0066] In addition or alternatively, for a UE-side SBFD operation (or duplex operation for some wireless technologies) , benefits of an SBFD operation may be experienced for all user devices 102 with UE-side SBFD capability if the user devices 102 are configured with some overlapped RBs with a single UL subband. This may not be optimal, however. Nonetheless, because different user devices 102 may support different maximum bandwidths, or different user devices 102 may support different capabilities to support different maximum subband bandwidths, then multiple subbands (e.g., multiple UL subbands or multiple DL subbands) can be supported.
[0067] In further detail, in some implementations, multiple subbands (e.g., multiple UL subbands or multiple DL subbands) for a UE-side SBFD operation are supported. In some of these implementations, resources of the multiple subbands may be determined by independent configurations, where each configuration is for a respective one of the multiple subbands. In other of these implementations, a single, common, and / or joint configuration is used to determine the resources for the multiple subbands.
[0068] In addition or alternatively, in implementations where cell-specific subbands are used (e.g., a cell-specific UL subband and / or a cell-specific DL subband) , the resources of the multiple subbands can be determined by independent cell-specific subband configurations, each for one of the multiple subbands.
[0069] In addition or alternatively, in implementations that use a joint configuration to determine resource for multiple subbands, one or more of the following schemes may be implemented or applied.
[0070] In a first scheme, the starting RBs of the multiple subbands are configured independently, and the number of PRBs for each of the multiple subbands are the same. That is, the same number of PRBs are configured for each of the multiple subbands.
[0071] In a second scheme, the starting RB of a subband with a lowest index of the multiple subbands (e.g., a UL subband with a lowest index of multiple UL subbands or a DL subband with a lowest index of mulitple DL subbands) is configured, and an RB offset is also configured or used to determine a next subband relative to a previous subband. Also, the number of PRBs are the same or different for each of the multiple subbands. That is, the same or different number of PRBs may be configured for each of the multiple subbands. Of note, in some implementations, the number of subbands (e.g., the number of UL subbands or the number of DL subbands) may be implicitly determined by a carrier bandwidth, which may include a maximum number of subbands (e.g., a maximum number of UL subbands or a maximum number of DL subbands) . In other implementations, the number of subbands may be explicitly configured.
[0072] In a third scheme, the starting RB of a DL / UL subband with a lowest index of the muliple subbands is configured and the number of PRBs for all of the multiple subbands are configured, which may be divided into N subbands with a predefined or configured RB gap between two adjacent subbands. In some of these implementations of the third scheme, N is an integer, which may be a configured value or a reported value.
[0073] In a fourth scheme, M candidate configurations of the multiple subbands may be predefined, and one of the M candidate configurations is configured.
[0074] In addition or alternatively, in some implementations where a user device 102 supports UE-side SBFD operation, up to one subband (e.g., up to one UL subband or up to one DL subband) is supported by the user device 102. In some of these implementations, the resources of the subband (s) or usable PRBs of the user device 102 may be determined by at least one of cell-specific DL or UL subband configuration, an active DL or UL BWP, and the UE-supported DL / UL subbands supported by the user device 102. For each subband, the resources of the subband or usable PRBs of the user deice 102 may be determined according to the implementations as previously described.
[0075] Fig. 9 shows a diagram of an example configuration of a UE-side SBFD operation associated with multiple user device BWPs. As shown in Fig. 9, two cell-specific UL subbands are configured. Suppose for example that the UL subband for a first user device (UE1) , a second user device (UE2) , and a third user deice (UE3) may be derived based on UL subband 1, and the UL subband for a fourth user device (UE4) may be derived based on UL subband 2. Based on the example, multiple UL subbands can be supported to achieve UE off-loading on a carrier for user devices 102 with UE-side SBFD capability.
[0076] In some implementations including multiple subbands (e.g., multiple UL subbands or multiple DL subbands) , at least one same parameter in multiple UL subbands may be configured by the same RRC configuration. The at least one same parameter may include, for example, one or more of: the number of RBs, the number of SBFD symbols, or the hopping offset of the UL subband. In addition or alternatively, in some implementation including multiple subbands, at least one same parameter in multiple subbands may be configured by independent RRC configurations. The at least one same parameter may include, for example, one or more of: the power control parameter, a configured grant (CG) PUSCH configuration, or a random access channel occasion (RO) of the subband.
[0077] Accordingly, in some implementations for a UE-side SBFD operation (or a duplex operation for some wireless technologies) , the resources of the subband (s) or usable PRBs of a user device 102 may be determined by at least one of cell-specific DL / UL subband configuration, active DL / UL BWP, and the UE-supported DL / UL subbands. In some of these implementations, multiple UL / DL subbands may be supported to achieve UE off-loading on a carrier. This, in turn, may beneficially used to derive different UL / DL subbands for different user deice 102 with different subband capabilities, which in turn may lead to more efficient system performance, including for implementations utilizing both gNB-SBFD and UE-side SBFD.
[0078] In addition or alternatively, in some implementations where multiple subbands (e.g., multiple UL subbands or multiple DL subbands) are supported for an SBFD operation, the SBFD operation may be performed in accordance with one or more restrictions on, or characteristics of, transition points. As used herein, a transition point is a point in the time domain that a set of consecutive time units (e.g., symbols or slots, or a duration (e.g., some milliseconds) ) changes or transitions between a downlink D time unit (e.g., symbol or slot) to an uplink (U) time unit (symbol or slot) , such as from a D time unit to a U time unit, or from a U time unit to a D time unit. In some implementations, the transition point is or includes a gap between a D time unit and a U time unit. In some of these implementations, a restriction or characteristic may include the transition points for all of the multiple subbands are configured with a same number, such as jointly with the same number. Another restriction or characteristic may include that the transition points for all of the multiple subbands are configured independently, such that at least two of the numbers of the transition points may be different from each other. Another restriction or characteristic is that the transition points are aligned. Another restriction or characteristic is that the transition points are not aligned.
[0079] Accordingly, in some implementations, a SBFD operation may be configured such that the multiple subbands have the same number of transition points, and the transition points are aligned for all of the subbands. In some of these implementations, a frame structure is the same for all of the multiple subbands. That is, the transition points of all of the multiple subbands are the same, including the same number of transition points and the same location of the transition points. Fig. 10 shows a diagram of such a configuration for a SBFD operation, where the subbands all extend over the same ‘D D D F U’ frame structure, and the subbands have the same number of transition points at the same locations. In some other of these implementations, the frame structures are not the same for all of the multiple subbands. In some of these implementations, the subbands located in different frame structures may have the same transition points, including the same number of transition points and the same location of the transition points.
[0080] Fig. 11 shows a diagram of such a configuration for a SBFD operation, where the two UL subbands extends over different frame structures. That is, one (the top) UL subband extends over a ‘D D D F U’ frame structure, whereas the other (bottom) UL subband extends over a ‘D D F U U’ frame structure. However, the transition points for the two UL subbands are the same in both number and location.
[0081] In some other implementations, a SBFD operation may be configured such that all of the subbands have the same number of transition points, and the transition points are not all aligned. For example, at least two of the transition points are unaligned. In some of these other implementations, frame structures for the subbands may be the same, and the subbands have the same number of transition points, but the locations of at least two of the transition points are different. Fig. 12 shows a diagram of such a configuration. As shown in Fig. 12, both of the UL subbands extend in the same ‘D D D F U’ frame structure, and both have the same number of transition points. However, the starting transition point for the subbands are located in different symbols. In other of these implementations, frame structures for the the subbands are different, the subbands have the same number of transition points, but the locations of the transition points are different. Fig. 13 shows a diagram of such a configuration. As shown in Fig. 13, one (the top) of the UL subbands extends over a ‘D D D F U’ frame structure, whereas the other (the bottom) of the UL subbands extends over a ‘D D F U U’ frame structure. Additionally, the UL subbands have the same number of transition points, but the transition points are located in different locations. That is the starting transition points are in different symbols, and the end transition points are in different symbols.
[0082] In still some other implementations, a SBFD operation may be configured such that at least two of the subbands have different numbers of transition points, and the transition points are not aligned for all of the subbands. In some of these implementations, the frame structure is the same for all of the subbands, but the numbers of transition points and the locations of the transition points are not the same for the subbands. Fig. 14 shows a diagram of such a configuration. As shown in Fig. 14, the UL subbands extend in the same ‘D D D F U’ frame structure. However, the numbers and locations of transition points for the two UL subbands are different. In other of these implementations, the frame structures of the subbands are different, and the numbers and locations of the transition points of the subbands are different. Fig. 15 shows a diagram of such a configuration. As shown in Fig. 15, the “top” UL subband extends in a ‘D D D F U’ frame structrure, and the “bottom” UL subband extends in a ‘D D F U U’ frame structure. Also, the numbers and locations of the transition points of the two UL subbands are different.
[0083] In addition or alternatively, in some implementations, a maximum number of N (an integer of two or more) transition points for all subbands can be same as or different from each other.
[0084] In addition or alternatively, in some implementations, a frame structure configured for one or more subbands may be determined according to one of the following. For an inband full duplex (IBFD) operation: the frame structure may be configured per subband. For a SBFD operation, a frame structure may be configured per set of subbands, including at least one UL subband and one DL subband. For example, a set of subbands may include two DL subbands and one UL subband. For another example, a set of subbands may include one DL subband and one UL subband.
[0085] In addition or alternatively, in some implementations, a maximum of one UL subband or one DL subband is supported for a user device 102. In such implementations, the user device 102 is not expected to have a configuration for multiple UL subbands or multiple DL subbands.
[0086] Accordingly, for a UE-side SBFD operation (or a duplex operation for some wireless technologies) , the resources of the subband (s) or usable PRBs of a user device 102 may be determined by at least one of cell-specific DL or UL subband configuration, an active DL or UL BWP, and one or more UE-supported DL or UL subbands. Additionally, in some implementations, multiple subbands can be supported to achieve UE off-loading on a carrier. This, in turn, may beneficially allow for different UL or DL subbands to be derived for different user devices 102 with different subband capabilities, which in turn may allow for a more efficient system performance to be achieved, including implementations involving the same or different transition points for multiple subbands.
[0087] Irrespective of whether a user device 102 with UE-side SBFD capability supports only a single or multiple subbands, the user device 102 may employ one or more schemes to enhance collision handling between a DL reception and an UL transmission. Through such enhancement, for UE-side SBFD, a collision between an overlapping (or simultaneous) DL reception and UL transmission may be avoided, or may still occur (or be present) , when but with one or more restrictions when a user device 102 performs simultaneous DL reception and UL transmission. In some of these implementations, the one or more restrictions includes one or more of the following restriction aspects.
[0088] In a first restriction, DL reception and UL transmission may be supported when the DL reception and / or the UL transmission is restricted to within one subband. That is, the simultaneous DL reception and UL transmission cannot be supported if the DL reception and / or the UL transmission is located across multiple subbands. For example, Fig. 15 shows a diagram of an example of a PUSCH and a PDSCH each in a single subband. As shown in Fig. 15, the overlapped DL reception (PDSCH) and UL transmission (PUSCH) in the time domain can be supported or processed simultaneously by the user device 102 because the PDSCH is located in a single DL subband and the PUSCH is located in a single UL subband. For another example, Fig. 16 shows a diagram of an example configuration of a PUSCH and a PDSCH, where the PDSCH is located across multiple subbands. As shown in Fig. 16, the overlapped DL reception (PDSCH) and UL transmission (PUSCH) in the time domain cannot be supported or processed simultaneously by the user device 102, because the PDSCH is located across two DL subbands.
[0089] In a second restriction, simultaneous DL reception and UL transmission may be supported when the DL reception and the UL transmission are for different types of traffic. Different types of traffic may include, for example, unicast, broadcast, and multicast. That is, simultaneous DL reception and UL transmission may not be supported when the DL reception and the UL transmission are for same type of traffic. For example, an overlapping DL reception (e.g., PDSCH) and UL transmission (e.g., PUSCH) in the time domain may be supported or processed simultaneously by the user device 102 when the PDSCH carried with broadcast (or is a broadcast reception) and the PUSCH is carried with unicast (or is a unicast transmission) . For another example, the overlapping DL reception (e.g., PDSCH) and UL transmission (e.g., PUSCH) in the time domain may not be supported or processed simultaneously by the user device 102 when the PDSCH is carried with unicast (or is a unicast reception) and the PUSCH is carried with unicast (or is a unicast transmission) .
[0090] As an alternative to the second restriction, simultaneous DL reception and UL transmission may be supported when the DL reception and the UL transmission are for the same type of traffic, such as both are unicast for example. That is, DL reception and UL transmission may not be supported when the DL reception and the UL transmission are for different types of traffic, such as for example one is for unicast and the other is for broadcast or multicast.
[0091] In a third restriction, simultaneous DL reception and UL transmission may be supported when the DL reception and the UL transmission are different types of channels or signals. Different types of channels or signals may include a control channel or reference signal and a traffic channel. That is, simultaneous DL reception and UL transmission may not be supported when the DL reception and the UL transmission are the same type of channel or signal. For example, simultaneous DL reception and UL transmission may not be supported when both are traffic channels. As another example, overlapping DL reception and UL transmission in the time domain may be supported or processed simultaneously by the user device 102 when the DL reception is a PDCCH and the UL transmission is a PUSCH. As another example, the overlapping DL reception and the UL transmission in the time domain may not be supported or processed simultaneously by the user device 102 when the DL reception is a PDSCH and the UL transmission is a PUSCH.
[0092] As an alternative to the third restriction, simultaneous DL reception and UL transmission may be supported when the DL reception and the UL transmission are the same type of channel or signal. For example, simultaneous DL reception and UL transmission may be supported when the they are both traffic channels. That is, simultaneous DL reception and UL transmission may not be supported when the DL reception and the UL transmission are different types of channels or signals, such as when one is a control channel or reference signal, and the other is a traffic channel.
[0093] In a fourth restriction, simultaneous DL reception and UL transmission may be supported except when the DL reception or UL transmission is for measurement. For example, simultaneous DL reception and UL transmission may not be supported when the DL reception is a reference signal for measurement, such as a synchronization signal (SSB) , a channel state information reference signal (CSI-RS) for Layer 1 reference signal received power (L1 RSRP) , cross-link interference (CLI) , or for beam measurement and / or reporting.
[0094] As an alternative to the fourth restriction, simultaneous DL reception and UL transmission may be supported when the DL reception or UL transmission is for measurement. For example, simultaneous DL reception and UL transmission may be supported when the DL reception is a reference signal for measurement, e.g., a SSB or CSI-RS for L1 RSRP, CLI, or beam measurement and / or reporting.
[0095] In a fifth restriction, simultaneous DL reception and UL transmission may be supported except when one or more predefined or configured or indicated beams or beam pairs are used for the DL reception and / or the UL transmission. In some implementations of the fifth restriction, the beam (s) or beam pair (s) may be reported by the user device, such as by RRC, a medium access control control element (MAC CE) or uplink control information (UCI) . In addition or alternatively, in some implementations of the fifth restriction, the beam (s) or beam pair (s) may be at least represented or associated by CSI-RS resource (s) .
[0096] As an alternative to the fifth restriction, simultaneous DL reception and UL transmission may be supported when the predefined or configured or indicated beam (s) or beam pair (s) are used for the DL reception and / or the UL transmission. In some of these implementations, the beam (s) or beam pair (s) may be reported by the user device 102, such as by RRC, a MAC CE, or UCI. In addition or alternatively, in some implementations of the fifth restriction, the beam (s) or beam pair (s) may be at least be reflected by CSI-RS resource (s) .
[0097] In a sixth restriction, simultaneous DL reception and UL transmission may be supported when a first mode 1 is applied. That is, simultaneous DL reception and UL transmission may not be supported when a second mode is applied. For example, the first mode may be a UE-side SBFD mode, and the second mode may be a gNB-side SBFD mode. As another example, the first mode may be a gNB-side SBFD mode, and the second mode may be a UE-side SBFD mode.
[0098] In addition or alternatively, in some implementations, simultaneous DL reception and UL transmission may not be supported when a minimum time offset between the DL reception and the UL transmission is applied to resolve a lack of sufficient transition time between transmission and reception at the side of the user device 102.
[0099] In addition or alternatively, in some implementations, simultaneous DL reception and UL transmission may include at least one of following scenarios. A first scenario may include a dynamically scheduled DL reception and a semi-statically configured UL transmission. For example, in the first scenario, a dynamic PDSCH or CSI-RS may collide with a configured sounding reference signal (SRS) , a PUCCH, or a CG PUSCH. A second scenario may include a semi-statically configured DL reception and a dynamically scheduled UL transmission. For example, in the second scenarios, a PDCCH or a semi-persistent scheduling (SPS) PDSCH may collide with a dynamic PUSCH or PUCCH. A third scenario may include a semi-statically configured DL reception and a semi-statically configured UL transmission. A fourth scenario may include a dynamically scheduled DL reception and a dynamically scheduled UL transmission. A fifth scenario may include a SSB and a dynamically scheduled or configured UL transmission, such as a PUSCH, a PUCCH, a physical random access channel (PRACH) , or a SRS. A sixth scenario may include a dynamic or semi-static DL transmission and a valid random access channel occasion (RO) .
[0100] In further detail, using the second scenario that includes a semi-statically configured DL reception and a dynamically scheduled UL transmission, suppose for example that a PDCCH or SPS PDSCH collides with a dynamic PUSCH or PUCCH. For a UE-side SBFD operation, the collision between the simultaneous or overlapping DL reception and UL transmission may be absent, based on a capability of the user device 102. That is, for operation on a single carrier in an unpaired spectrum, if the user device 102 does not indicate the capability of “UE-side SBFD” , if the user deice 102 is configured by higher layers to receive a PDCCH, a PDSCH, a CSI-RS, or a DL positioning reference signal (PRS) in a set of symbols of a slot, then the user device 102 may receive the PDCCH, the PDSCH, the CSI-RS, or the DL PRS if the user device 102 does not detect a DCI format that indicates to the user device 102 to transmit a PUSCH, a PUCCH, a PRACH, or a SRS in at least one symbol of the set of symbols of the slot. Otherwise, the user device 102 may not receive the PDCCH, the PDSCH, the CSI-RS, or the DL PRS in the set of symbols of the slot. For operation on a single carrier in an unpaired spectrum, if the user device 102 indicates the capability of “UE-side SBFD” , if the user device 102 is configured by higher layers to receive a PDCCH, a PDSCH, a CSI-RS, or a DL PRS in a set of symbols of a slot, the user device 102 may receive the PDCCH, the PDSCH, the CSI-RS, or the DL PRS if the user device 102 detects a DCI format that indicates to the user device 102 to transmit a PUSCH, a PUCCH, a PRACH, or a SRS in at least one symbol of the set of symbols of the slot.
[0101] As another example using the second scenario that includes a semi-statically configured DL reception and a dynamically scheduled UL transmission, suppose for example that a PDCCH or a SPS PDSCH collides with a dynamic PUSCH or PUCCH. For a UE-side SBFD operation, the collision between the overlapped or simultaneous DL reception and UL transmission may be still present with one or more restrictions for the simultaneous DL reception and UL transmission, based on at least one of above options. The one or more restrictions may include one or more of the following. In a first restriction, the PDCCH or SPS PDSCH reception and dynamic PUSCH or PUCCH transmission may be supported when the PDCCH or SPS PDSCH is in the single DL subband, and / or the dynamic PUSCH or PUCCH is in the single UL subband. In some implementations involving the first restriction, only a dynamic PUSCH or PUCCH transmission is supported when the PDCCH or SPS PDSCH is across two DL subbands. In a second restriction, SPS PDSCH reception and dynamic PUSCH transmission may be supported when the SPS PDSCH and the dynamic PUSCH are carried with different types of traffic, e.g., one is broadcast, and the other is unicast. In some implementations of the second restriction, only a dynamic PUSCH transmission is supported when the SPS PDSCH and the dynamic PUSCH are carried with the same type of traffic. In a third restriction, a PDCCH reception and a dynamic PUSCH transmission may be supported. In some implementations of the third restriction, only a dynamic PUSCH transmission is supported when the SPS PDSCH and the dynamic PUSCH overlap.
[0102] Accordingly, for a UE-side SBFD operation (or a duplex operation for some wireless technologies) , the resources of the subband (s) or usable PRBs of a user device 102 may be determined by at least one of cell-specific DL / UL subband configuration, an active DL / UL BWP and one or more UE-supported DL / UL subbands. This, in turn, may allow for a more efficient system performance to be achieved, including when enhanced collision handling is performed for an overlapping or simultaneous DL reception and UL transmission according to a SBFD operation.
[0103] In addition or alternatively, in some implementations, both gNB-side SBFD and UE-side SBFD may be supported by a user device 102. In some of these implementations, a user device 102 may use or apply one or both of these two types of SBFD, or may determine a relationship between the UE-side SBFD and the gNB-side SBFD, according to one or more of the following schemes.
[0104] In a first scheme, one of the gNB-side SBFD and UE-side SBFD is determined by a semi-static configuration. In some of these implementations, the user device 102 may report that it supports the gNB-side SBFD capability. In such implementations, the user device 102 may operate as a SBFD-aware user device 102 in a gNB-side SBFD mode with SBFD configured. In addition or alternatively, in some of these implementations, the user device 102 may be configured as a SBFD-aware user device 102 or a non-SBFD aware user device 102. In addition or alternatively, in some of these implementations, the user device 102 may not be a SBFD-aware user device 102 configured as a non-SBFD aware user device 102.
[0105] In addition or alternatively, in some implementations of the first scheme, in event that the user device 102 reports its support of UE-side SBFD capability (which may implicitly indicate that the user device 102 also supports gNB-side SBFD capability) , or reports its support of UE-side SBFD capability and gNB-side SBFD capability, then the user device 102 may operate as a SBFD-aware user device 102 in a UE-side SBFD mode, or may be configured as a SBFD-aware user device 102 in UE-side SBFD mode or gNB-side SBFD mode with SBFD configured. In some of these implementations, the user device 102 may be configured as a SBFD-aware user device 102 in a UE-side SBFD mode or gNB-side SBFD mode, or a non-SBFD aware user device 102. In addition or alternatively, in some of these implementations, the user device 102 may not be a SBFD-aware user device 102 configured as a non-SBFD aware user device 102.
[0106] In a second scheme, one of the gNB-side SBFD and the UE-side SBFD is determined by a dynamic indication. That is, the user device 102 may dynamically switch, and / or support dynamically switching, between the UE-side SBFD and the gNB-side SBFD. In some implementations, the user device 102 may report its support of UE-side SBFD capability (which may also implicitly indicate that it also support gNB-side SBFD capability) , or may report its support of UE-side SBFD capability and gNB-side SBFD capability. In some of these implementations, the user device 102 may dynamically operate as a SBFD-aware user device 102 in a UE-side SBFD mode or gNB-side SBFD mode, such as by switching between the two modes. In addition or alternatively, in some implementations, the user device 102 may switch between the UE-side SBFD mode and the gNB-side SBFD mode in response to, or based on, a DCI, a MAC CE, or results of a measurement. To illustrate, the user device 102 may supports or operate in the UE-side SBFD mode (which may include simultaneous DL reception and UL transmission) in response to a CLI measurement being less or no larger than a threshold. Otherwise, if the CLI measurement is greater than the threshold, then the user device 102 may be configured in, or fallback to, the gNB-side SBFD (which may include single direction transmission) .
[0107] In addition or alternatively, in some implementations, a user device 102 may support and / or operate in more modes (in addition to the UE-side SBFD mode and the gNG-side SBFD mode) when IBFD is utilized. Correspondingly, such other modes may include gNB-side IBFD and UE-side IBFD. In such implementations, the user device may support, operate in, and / or dynamically switch between these modes according to one or more relationship or triggering conditions.
[0108] Accordingly, for a UE-side SBFD operation (or a duplex operation in some wireless technologies) , the resources of the subband (s) or usable PRBs of a user device 102 may be determined by at least one of: a cell-specific DL or UL subband configuration, an active DL or UL BWP, or one or more UE-supported DL or UL subbands. This, in turn, may allow for more efficient system performance to be achieved, including for implementations that utilize switching between UE-side SBFD and gNB-side SBFD and / or when an SBFD operation on the UE-side is performed in response to one or more thresholds being satisfied.
[0109] The description and accompanying drawings above provide specific example embodiments and implementations. The described subject matter may, however, be embodied in a variety of different forms and, therefore, covered or claimed subject matter is intended to be construed as not being limited to any example embodiments set forth herein. A reasonably broad scope for claimed or covered subject matter is intended. Among other things, for example, subject matter may be embodied as methods, devices, components, systems, or non-transitory computer-readable media for storing computer codes. Accordingly, embodiments may, for example, take the form of hardware, software, firmware, storage media or any combination thereof. For example, the method embodiments described above may be implemented by components, devices, or systems including memory and processors by executing computer codes stored in the memory.
[0110] Throughout the specification and claims, terms may have nuanced meanings suggested or implied in context beyond an explicitly stated meaning. Likewise, the phrase “in one embodiment / implementation” as used herein does not necessarily refer to the same embodiment and the phrase “in another embodiment / implementation” as used herein does not necessarily refer to a different embodiment. It is intended, for example, that claimed subject matter includes combinations of example embodiments in whole or in part.
[0111] In general, terminology may be understood at least in part from usage in context. For example, terms, such as “and” , “or” , or “and / or, ” as used herein may include a variety of meanings that may depend at least in part on the context in which such terms are used. Typically, “or” if used to associate a list, such as A, B or C, is intended to mean A, B, and C, here used in the inclusive sense, as well as A, B or C, here used in the exclusive sense. In addition, the term “one or more” as used herein, depending at least in part upon context, may be used to describe any feature, structure, or characteristic in a singular sense or may be used to describe combinations of features, structures or characteristics in a plural sense. Similarly, terms, such as “a, ” “an, ” or “the, ” may be understood to convey a singular usage or to convey a plural usage, depending at least in part upon context. In addition, the term “based on” may be understood as not necessarily intended to convey an exclusive set of factors and may, instead, allow for existence of additional factors not necessarily expressly described, again, depending at least in part on context.
[0112] Reference throughout this specification to features, advantages, or similar language does not imply that all of the features and advantages that may be realized with the present solution should be or are included in any single implementation thereof. Rather, language referring to the features and advantages is understood to mean that a specific feature, advantage, or characteristic described in connection with an embodiment is included in at least one embodiment of the present solution. Thus, discussions of the features and advantages, and similar language, throughout the specification may, but do not necessarily, refer to the same embodiment.
[0113] Furthermore, the described features, advantages and characteristics of the present solution may be combined in any suitable manner in one or more embodiments. One of ordinary skill in the relevant art will recognize, in light of the description herein, that the present solution can be practiced without one or more of the specific features or advantages of a particular embodiment. In other instances, additional features and advantages may be recognized in certain embodiments that may not be present in all embodiments of the present solution.
[0114] The subject matter of the disclosure may also relate to or include, among others, the following aspects:
[0115] A first aspect includes a method for wireless communication that includes: determining, by a user device, resources for at least one first subband based on at least one second subband supported by a capability of the user device; and communicating, by the user device, at least one channel or signal in at least the resources for the at least one first subband.
[0116] A second aspect includes a method for wireless communication that includes: determining, by a network device, resources for at least one first subband based on at least one second subband supported by a capability of a user device; and communicating, by the network device, at least one channel or signal in at least the resources for the at least one first subband.
[0117] A third aspect includes any of the first or second aspect, and further includes wherein the resources are determined further based on at least one of: a cell-specific subband or a bandwidth part (BWP) .
[0118] A fourth aspect includes the third aspect, and further includes wherein the BWP comprises an active BWP, and wherein the resources are determined based on an intersection of the cell-specific subband, the active BWP in subband full duplex (SBFD) symbols, and the at least one second subband supported by the capability of the user device.
[0119] A fifth aspect includes the fourth aspect, and further includes wherein a size of the first subband is determined by the second subband supported by the capability of the user device, and a starting resource block (RB) of the resources is determined by a first valid RB at an intersection between the cell-specific subband and the active BWP in SBFD symbols.
[0120] A sixth aspect includes any of the third or fifth aspects, and further includes wherein the BWP comprises an active BWP, and wherein the resources are determined based on an intersection of the cell-specific subband, the active BWP in subband full duplex in (SBFD) symbols, and at least one user device-specific UL subband configuration.
[0121] A seventh aspect includes any of the third through sixth aspects, and further includes wherein the at least one first subband comprises a plurality of first subbands, and each of the first subbands is further determined by a respective one of a plurality of independent cell-specific subband configurations.
[0122] An eighth aspect includes any of the third through sixth aspects, and further includes wherein the at least one first subband comprises a plurality of first subbands, and wherein the first subbands are determined by a joint cell-specific subband configuration.
[0123] A ninth aspect includes the eighth aspect, and further includes wherein the joint cell-specific subband configuration comprises a starting resource block (RB) of a subband with a lowest index of the plurality of first subbands and a RB offset used to determine a next subband relative to a previous subband.
[0124] A tenth aspect includes any of the first through ninth aspects, and further includes wherein a restriction on transition points for all of a plurality of subbands in an active bandwidth part (BWP) of the user device comprises: the plurality of subbands have a same number of transition points as each other; or the plurality of subbands have independent numbers of transition points.
[0125] An eleventh aspect includes the tenth aspect, and further includes wherein the plurality of subbands have the same number of transition points, and the transition points are aligned.
[0126] A twelfth aspect includes the tenth aspect, and further includes wherein the plurality of subbands have the same number of transition points, and the transition points are not aligned.
[0127] A thirteenth aspect includes the tenth aspect, and further includes wherein the plurality of subbands have independent numbers of transition points, at least two of the independent numbers are different from each other, and the transition points are not aligned.
[0128] A fourteenth aspect includes any of the first through thirteenth aspects, and further includes wherein the communicating the at least one channel or signal comprises: simultaneously performing, by the user device, an uplink (UL) transmission and a downlink (DL) reception according to a restriction.
[0129] A fifteenth aspect includes the fourteenth aspect, and further includes wherein the restriction comprises at least one of: the DL reception is restricted to one DL subband and / or the UL transmission is restricted to one UL subband; the DL reception and the UL transmission are for different types of traffic; the DL reception and the UL transmission are different channels or signals of the at least one channel or signal; the DL reception and / or the UL transmission are not for measurement; orat least one predefined or configured beam is used for the DL reception and the UL transmission.
[0130] A sixteenth aspect includes the fifteenth aspect, and further includes wherein the UL transmission and the DL reception comprise at least one of: a dynamically scheduled DL reception and a semi-statically configured UL transmission, a semi-statically configured DL reception and a dynamically scheduled UL transmission, a semi-statically configured DL reception and a semi-statically configured UL transmission, a dynamically scheduled DL reception and a dynamically scheduled UL transmission, a synchronization signal block (SSB) and a dynamically scheduled or configured UL transmission, or a dynamically scheduled or semi-statically configured DL reception and a valid random access channel occasion (RO) .
[0131] A seventeenth aspect includes any of the first through sixteenth aspects, and further includes wherein the user device supports both network-side subband full duplex (SBFD) and user device-side SBFD.
[0132] An eighteenth aspect includes the seventeenth aspect, and further includes wherein the user device determines at least one of the network-side SBFD and the user device-side SBFD according to a semi-static configuration.
[0133] A nineteenth aspect includes the seventeenth aspect, and further includes wherein the user device dynamically switches between the network-side SBFD and the user-device-side SBFD, in response to a downlink control information (DCI) , a medium access control control element (MAC CE) , or results of a measurement.
[0134] A twentieth aspect includes a wireless communications apparatus comprising at least one processor and a memory, wherein the at least one processor is configured to cause the apparatus to perform a method of any of the first through nineteenth aspects.
[0135] A twentieth aspect includes a computer program product comprising a computer-readable program medium comprising code stored thereupon, the code, when executed by at least one processor, causing the at least one processor to perform a method of any of the first through nineteenth aspects.
[0136] In addition to the features mentioned in each of the independent aspects enumerated above, some examples may show, alone or in combination, the optional features mentioned in the dependent aspects and / or as disclosed in the description above and shown in the figures.
Claims
1.A method for wireless communication, the method comprising:determining, by a user device, resources for at least one first subband based on at least one second subband supported by a capability of the user device; andcommunicating, by the user device, at least one channel or signal in at least the resources for the at least one first subband.2.A method for wireless communication, the method comprising:determining, by a network device, resources for at least one first subband based on at least one second subband supported by a capability of a user device; andcommunicating, by the network device, at least one channel or signal in at least the resources for the at least one first subband.3.The method of any of claims 1 or 2, wherein the resources are determined further based on at least one of: a cell-specific subband or a bandwidth part (BWP) .4.The method of claim 3, wherein the BWP comprises an active BWP, and wherein the resources are determined based on an intersection of the cell-specific subband, the active BWP in subband full duplex (SBFD) symbols, and the at least one second subband supported by the capability of the user device.5.The method of claim 4, wherein a size of the first subband is determined by the second subband supported by the capability of the user device, and a starting resource block (RB) of the resources is determined by a first valid RB at an intersection between the cell-specific subband and the active BWP in SBFD symbols.6.The method of claim 3, wherein the BWP comprises an active BWP, and wherein the resources are determined based on an intersection of the cell-specific subband, the active BWP in subband full duplex in (SBFD) symbols, and at least one user device-specific UL subband configuration.7.The method of claim 3, wherein the at least one first subband comprises a plurality of first subbands, and each of the first subbands is further determined by a respective one of a plurality of independent cell-specific subband configurations.8.The method of claim 3, wherein the at least one first subband comprises a plurality of first subbands, and wherein the first subbands are determined by a joint cell-specific subband configuration.9.The method of claim 8, wherein the joint cell-specific subband configuration comprises a starting resource block (RB) of a subband with a lowest index of the plurality of first subbands and a RB offset used to determine a next subband relative to a previous subband.10.The method of any of claims 1 or 2, wherein a restriction on transition points for all of a plurality of subbands in an active bandwidth part (BWP) of the user device comprises:the plurality of subbands have a same number of transition points as each other; orthe plurality of subbands have independent numbers of transition points.11.The method of claim 10, wherein the plurality of subbands have the same number of transition points, and the transition points are aligned.12.The method of claim 10, wherein the plurality of subbands have the same number of transition points, and the transition points are not aligned.13.The method of claim 10, wherein the plurality of subbands have independent numbers of transition points, at least two of the independent numbers are different from each other, and the transition points are not aligned.14.The method of claim 1, wherein the communicating the at least one channel or signal comprises:simultaneously performing, by the user device, an uplink (UL) transmission and a downlink (DL) reception according to a restriction.15.The method of claim 14, wherein the restriction comprises at least one of:the DL reception is restricted to one DL subband and / or the UL transmission is restricted to one UL subband;the DL reception and the UL transmission are for different types of traffic;the DL reception and the UL transmission are different channels or signals of the at least one channel or signal;the DL reception and / or the UL transmission are not for measurement; orat least one predefined or configured beam is used for the DL reception and the UL transmission.16.The method of claim 15, wherein the UL transmission and the DL reception comprise at least one of: a dynamically scheduled DL reception and a semi-statically configured UL transmission, a semi-statically configured DL reception and a dynamically scheduled UL transmission, a semi-statically configured DL reception and a semi-statically configured UL transmission, a dynamically scheduled DL reception and a dynamically scheduled UL transmission, a synchronization signal block (SSB) and a dynamically scheduled or configured UL transmission, or a dynamically scheduled or semi-statically configured DL reception and a valid random access channel occasion (RO) .17.The method of claim 1, wherein the user device supports both network-side subband full duplex (SBFD) and user device-side SBFD.18.The method of claim 17, wherein the user device determines at least one of the network-side SBFD and the user device-side SBFD according to a semi-static configuration.19.The method of claim 17, wherein the user device dynamically switches between the network-side SBFD and the user-device-side SBFD, in response to a downlink control information (DCI) , a medium access control control element (MAC CE) , or results of a measurement.20.A wireless communications apparatus comprising at least one processor and a memory, wherein the at least one processor is configured to cause the apparatus to perform a method of any of claims 1 to 19.21.A computer program product comprising a computer-readable program medium comprising code stored thereupon, the code, when executed by at least one processor, causing the at least one processor to perform a method of any of claims 1 to 19.
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