WO2024082477A1

WO2024082477A1 - Methods and apparatuses for resource indication in subband non-overlapping full duplex scenario

Info

Publication number: WO2024082477A1
Application number: PCT/CN2023/072912
Authority: WO
Inventors: Ruixiang MA; Yuantao Zhang; Hongmei Liu; Zhi YAN; Haiming Wang
Original assignee: Lenovo Beijing Ltd
Current assignee: Lenovo Beijing Ltd
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2024-04-25
Anticipated expiration: 2025-07-18
Also published as: GB202509216D0; GB2639510A; EP4652794A1; CN120391084A

Abstract

Embodiments of the present disclosure relate to methods and apparatuses for resource indication in a subband non-overlapping full duplex (SBFD) scenario. According to some embodiments of the disclosure, a UE may: determine a reference region, wherein the reference region comprises a set of resource blocks (RBs) in a frequency domain and a set of symbols in a time domain, the set of symbols include at least one SBFD symbols; and receive downlink control information (DCI), which indicates whether one or more RBs and one or more symbols in a resource are used for DL reception or not, or indicates whether one or more RBs and one or more symbols in the resource are used for UL transmission or not, wherein RBs in the frequency domain of the resource are determined based on the reference region.

Description

METHODS AND APPARATUSES FOR RESOURCE INDICATION IN SUBBAND NON-OVERLAPPING FULL DUPLEX SCENARIO

TECHNICAL FIELD

Embodiments of the present disclosure generally relate to wireless communication technology, and more particularly to resource indication in a subband non-overlapping full duplex (SBFD) scenario.

BACKGROUND

Wireless communication systems are widely deployed to provide various telecommunication services, such as telephony, video, data, messaging, broadcasts, and so on. Wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power) . Examples of wireless communication systems may include fourth generation (4G) systems, such as long-term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems, which may also be referred to as new radio (NR) systems.

In order to realize a superior data rate and reduce latency in a wireless system (e.g., 5G system) , a spectrum on higher frequency band may be utilized. To overcome coverage reduction on such carriers, a duplexing scheme that enables simultaneous use of downlink (DL) and uplink (UL) within a time division duplex (TDD) carrier using a non-overlapping frequency resource (which may be referred to as “SBFD” ) may be employed. One intention of this scheme is to extend the duration over which uplink transmission can occur for improving uplink coverage and capacity.

With the introduction of SBFD, resource indication in certain use cases may become problematic. The industry desires technologies for facilitating resource indication in an SBFD scenario.

SUMMARY

Some embodiments of the present disclosure provide a user equipment (UE) . The UE may include a transceiver, and a processor coupled to the transceiver. The processor may be configured to: determine a reference region, wherein the reference region comprises a set of resource blocks (RBs) in a frequency domain and a set of symbols in a time domain, the set of symbols include at least one SBFD symbols; and receive downlink control information (DCI) , which indicates whether one or more RBs and one or more symbols in a resource are used for DL reception or not, or indicates whether one or more RBs and one or more symbols in the resource are used for UL transmission or not, wherein RBs in the frequency domain of the resource are determined based on the reference region.

In some embodiments of the present disclosure, the resource includes the set of symbols in the time domain.

In some embodiments of the present disclosure, the resource is divided into a first part and a second part in the frequency domain, and the first part and the second part are inserted by a UL subband. The set of symbols is divided into at least one symbol group, the DCI comprises a pair of bits for each of the at least one symbol group, a first bit of the pair of bits indicates whether the first part in a symbol group is used for DL reception or not, and a second bit of the pair of bits indicates whether the second part in the symbol group is used for DL reception or not.

In some embodiments of the present disclosure, the first part and the second part are inserted by the UL subband and a guard band.

Some embodiments of the present disclosure provide a base station (BS) . The BS may include a transceiver, and a processor coupled to the transceiver. The processor may be configured to: determine a reference region for a UE, wherein the reference region comprises a set of RBs in a frequency domain and a set of symbols in a time domain, the set of symbols include at least one SBFD symbols; and transmit, to the UE, a DCI, which indicates whether one or more RBs and one or more symbols in a resource are used for DL reception or not or indicates whether one or more RBs and one or more symbols in the resource are used for UL transmission or not, wherein RBs in the frequency domain of the resource are determined based on the reference region.

In some embodiments of the present disclosure, the DCI indicates whether one or more RBs and one or more symbols are used for DL reception or not, the RBs in the frequency domain of the resource are determined by removing RBs in a UL subband from the set of RBs. In some embodiments of the present disclosure, the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not, the RBs in the frequency domain of the resource are determined by removing RBs not in the UL subband from the set of RBs.

In some embodiments of the present disclosure, when all symbols in the reference region are SBFD symbols, the RBs in the frequency domain of the resource are determined by removing RBs in the UL subband from the set of RBs, or by removing RBs not in the UL subband from the set of RBs.

In some embodiments of the present disclosure, the set of symbols is divided into at least one symbol group in the time domain. For each of the at least one symbol group, in the case that all symbols in a symbol group are SBFD symbols, RBs in the frequency domain of the resource in the symbol group are determined by removing RBs in the UL subband from the set of RBs or by removing RBs not in the UL subband from the set of RBs.

In some embodiments of the present disclosure, in the case that at least one symbol in the reference region is not an SBFD symbol, the RBs in the frequency domain of the resource are equal to the set of RBs.

In some embodiments of the present disclosure the set of symbols is divided into at least one symbol group in the time domain; and for each of the at least one symbol group, in the case that at least one symbol in a symbol group is not an SBFD symbol, RBs in the frequency domain of the resource in the symbol group are equal to the set of RBs.

In some embodiments of the present disclosure, the number of removed RBs is determined based on an SCS configuration of the DL reception or UL transmission and an SCS configuration of the UL subband.

In some embodiments of the present disclosure, the processor is further configured to transmit an indication indicating a second set of RBs. Depending on the set of symbols in the reference region, the RBs in the frequency domain of the resource are equal to the second set of RBs or the set of RBs.

In some embodiments of the present disclosure, when all symbols in the reference region are SBFD symbols, the RBs in the frequency domain of the resource are equal to the second set of RBs; otherwise, the RBs in the frequency domain of the resource are equal to the set of RBs.

In some embodiments of the present disclosure, the set of symbols is divided into at least one symbol group. For each of the at least one symbol group, in the case that all symbols in a symbol group are SBFD symbols, RBs in the frequency domain of the resource in the symbol group are equal to the second set of RBs; otherwise, the RBs in the frequency domain of the resource in the symbol group are equal to the set of RBs.

In some embodiments of the present disclosure, the resource comprises the set of symbols in the time domain.

In some embodiments of the present disclosure, the resource is divided into a plurality of parts in the frequency domain. The set of symbols is divided into at least one symbol group, the DCI comprises an indicator for each of the at least one symbol group, and each bit of the indicator indicates whether a corresponding part of the plurality of parts in a symbol group is used for DL reception or not, or indicates whether the corresponding part of the plurality of parts in the symbol group is used for UL transmission or not.

In some embodiments of the present disclosure, the resource or the reference region is divided into a first part and a second part in the frequency domain, and the first part and the second part are inserted by a UL subband. The set of symbols is divided into at least one symbol group, the DCI comprises a pair of bits for each of the at least one symbol group, a first bit of the pair of bits indicates whether the first part in a symbol group is used for DL reception or not, and a second bit of the pair of bits indicates whether the second part in the symbol group is used for DL reception or not.

Some embodiments of the present disclosure provide a method performed by a UE. The method may include: determining a reference region, wherein the reference region comprises a set of RBs in a frequency domain and a set of symbols in a time domain, the set of symbols include at least one SBFD symbols; and receiving a DCI, which indicates whether one or more RBs and one or more symbols in a resource are used for DL reception or not, or indicates whether one or more RBs and one or more symbols in the resource are used for UL transmission or not, wherein RBs in the frequency domain of the resource are determined based on the reference region.

Some embodiments of the present disclosure provide a method performed by a BS. The method may include: determining a reference region for a UE, wherein the reference region comprises a set of RBs in a frequency domain and a set of symbols in a time domain, the set of symbols include at least one SBFD symbols; and transmitting, to the UE, a DCI, which indicates whether one or more RBs and one or more symbols in a resource are used for DL reception or not or indicates whether one or more RBs and one or more symbols in the resource are used for UL transmission or not, wherein RBs in the frequency domain of the resource are determined based on the reference region.

Some embodiments of the present disclosure provide an apparatus. According to some embodiments of the present disclosure, the apparatus may include: at least one non-transitory computer-readable medium having stored thereon computer-executable instructions; at least one receiving circuitry; at least one transmitting circuitry; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiving circuitry and the at least one transmitting circuitry, wherein the at least one non-transitory computer-readable medium and the computer executable instructions may be configured to, with the at least one processor, cause the apparatus to perform a method according to some embodiments of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to describe the manner in which the advantages and features of the disclosure can be obtained, a description of the disclosure is rendered by reference to specific embodiments thereof, which are illustrated in the appended drawings. These drawings depict only exemplary embodiments of the disclosure and are not therefore to be considered limiting of its scope.

FIG. 1 illustrates a schematic diagram of a wireless communication system in accordance with some embodiments of the present disclosure;

FIG. 2 illustrates an exemplary DL inter-UE multiplexing in accordance with some embodiments of the present disclosure;

FIGS. 3 and 4 illustrate exemplary SBFD schemes in accordance with some embodiments of the present disclosure;

FIG. 5 illustrates a flow chart of an exemplary procedure for resource indication in an SBFD scenario in accordance with some embodiments of the present disclosure;

FIGS. 6-9 illustrate exemplary SBFD schemes in accordance with some embodiments of the present disclosure;

FIG. 10 illustrates a flow chart of an exemplary procedure for resource indication in an SBFD scenario in accordance with some embodiments of the present disclosure; and

FIG. 11 illustrates a block diagram of an exemplary apparatus in accordance with some embodiments of the present disclosure.

DETAILED DESCRIPTION

The detailed description of the appended drawings is intended as a description of the preferred embodiments of the present disclosure and is not intended to represent the only form in which the present disclosure may be practiced. It should be understood that the same or equivalent functions may be accomplished by different embodiments that are intended to be encompassed within the spirit and scope of the present disclosure.

Reference will now be made in detail to some embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. To facilitate understanding, embodiments are provided under a specific network architecture (s) and new service scenarios, such as the 3rd generation partnership project (3GPP) 5G (NR) , 3GPP long-term evolution (LTE) Release 8, and so on. It is contemplated that along with the developments of network architectures and new service scenarios, all embodiments in the present disclosure are also applicable to similar technical problems; and moreover, the terminologies recited in the present disclosure may change, which should not affect the principles of the present disclosure.

FIG. 1 illustrates a schematic diagram of wireless communication system 100 in accordance with some embodiments of the present disclosure.

As shown in FIG. 1, wireless communication system 100 may include some UEs 101 (e.g., UE 101a and UE 101b) and a base station (e.g., BS 102) . Although a specific number of UEs 101 and BS 102 is depicted in FIG. 1, it is contemplated that any number of UEs and BSs may be included in the wireless communication system 100.

The UE (s) 101 may include computing devices, such as desktop computers, laptop computers, personal digital assistants (PDAs) , tablet computers, smart televisions (e.g., televisions connected to the Internet) , set-top boxes, game consoles, security systems (including security cameras) , vehicle on-board computers, network devices (e.g., routers, switches, and modems) , or the like. According to some embodiments of the present disclosure, the UE (s) 101 may include a portable wireless communication device, a smart phone, a cellular telephone, a flip phone, a device having a subscriber identity module, a personal computer, a selective call receiver, or any other device that is capable of sending and receiving communication signals on a wireless network. In some embodiments of the present disclosure, the UE (s) 101 includes wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like. Moreover, the UE (s) 101 may be referred to as a subscriber unit, a mobile, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal, or a device, or described using other terminology used in the art. The UE (s) 101 may communicate with the BS 102 via uplink (UL) communication signals.

The BS 102 may be distributed over a geographical region. In certain embodiments of the present disclosure, the BS 102 may also be referred to as an access point, an access terminal, a base, a base unit, a macro cell, a Node-B, an evolved Node B (eNB) , a gNB, a Home Node-B, a relay node, or a device, or described using other terminology used in the art. The BS 102 is generally a part of a radio access network that may include one or more controllers communicably coupled to one or more corresponding BSs 102. The BS 102 may communicate with UE (s) 101 via downlink (DL) communication signals.

The wireless communication system 100 may be compatible with any type of network that is capable of sending and receiving wireless communication signals. For example, the wireless communication system 100 is compatible with a wireless communication network, a cellular telephone network, a time division multiple access (TDMA) -based network, a code division multiple access (CDMA) -based network, an orthogonal frequency division multiple access (OFDMA) -based network, an LTE network, a 3GPP-based network, a 3GPP 5G network, a satellite communications network, a high-altitude platform network, and/or other communications networks.

In some embodiments of the present disclosure, the wireless communication system 100 is compatible with 5G NR of the 3GPP protocol. For example, BS 102 may transmit data using an orthogonal frequency division multiple (OFDM) modulation scheme on the DL and the UE (s) 101 may transmit data on the UL using a discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-S-OFDM) or cyclic prefix-OFDM (CP-OFDM) scheme. More generally, however, the wireless communication system 100 may implement some other open or proprietary communication protocols, for example, WiMAX, among other protocols.

In some embodiments of the present disclosure, the BS 102 and UE (s) 101 may communicate using other communication protocols, such as the IEEE 802.11 family of wireless communication protocols. Further, in some embodiments of the present disclosure, the BS 102 and UE (s) 101 may communicate over licensed spectrums, whereas in some other embodiments, the BS 102 and UE (s) 101 may communicate over unlicensed spectrums. The present disclosure is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol.

There would be multiple service types in a wireless communication system (e.g., an NR system) , including but not limited to, enhanced Mobile Broadband (eMBB) , ultra-reliable and low-latency communication (URLLC) , machine type communication (MTC) , and so on. Different services may have different requirements. For example, for URLCC, latency and reliability are important. To guarantee the latency of a URLLC service, it should be scheduled immediately. In some cases, it may occupy the location of another service such as an eMBB service. To guarantee the decoding accuracy of the eMBB service, a BS can indicate the pre-emption resource occupied by the URLLC service, and a UE can use the data transmitted in the remaining resource to decode. The smaller the granularity of the indication, the bigger the resource utilization and the higher the decoding accuracy. A similar process may also occur on the UL. A UE may cancel certain uplink transmission based on such indication.

Details of the resource indication in the above DL inter-UE multiplexing process and UL inter-UE multiplexing process will be described in the following text.

DL inter-UE multiplexing

In some embodiments of the present disclosure, when a UE detects a certain DCI format (for brevity, referred to as DCI format 2_1) for a serving cell from a configured set of serving cells, the UE may assume that no transmission to the UE is present in RBs (e.g., physical RBs (PRBs) ) and in symbols that are indicated by this DCI format 2_1, from a set of RBs (denoted as RB set #A) and a set of symbols (denoted as symbol set #A) of the last physical downlink control channel (PDCCH) monitoring period. For clarity, such indication may also be referred to as pre-emption indication in the context of the present disclosure. In some embodiments, the pre-emption indication may not be applicable to receptions of synchronization signal/physical broadcast channel (SS/PBCH) blocks. In the context of present disclosure, the region defined by RB set #A in the frequency domain and symbol set #A in the time domain may be referred to as a region for pre-emption indication.

In some embodiments, RB set #A may be equal to the active DL bandwidth part (BWP) and includes B_INT RBs (e.g., PRBs) . In some embodiments, symbol set #A may be based on the PDCCH monitoring period and may include N_INT symbols.

For example, assuming that a UE detects a DCI format 2_1 in a PDCCH reception in a slot, symbol set #A may be the lastsymbols prior to the first symbol of the PDCCH reception in the slot, where T_INT denotes the PDCCH monitoring periodicity (which can be provided by a higher layer parameter (e.g., monitoringSlotPeriodicityAndOffset as specified in 3GPP specifications) ) , denotes the number of symbols per slot (e.g., 14 symbols) , μ denotes the subcarrier spacing (SCS) configuration for a serving cell with mapping to a respective field in the DCI format 2_1, μ_INT denotes the SCS configuration of the DL BWP where the UE receives the PDCCH with the DCI format 2_1.

A slot format can be configured or determined by a higher layer configuration (e.g., a cell common UL/DL configuration such as tdd-UL-DL-ConfigurationCommon as specified in 3GPP specifications, or a UE specific UL/DL configuration such as tdd-UL-DL-ConfigurationDedicated as specified in 3GPP specifications) . When the UE is provided with a slot format configuration (e.g., tdd-UL-DL-ConfigurationCommon) , symbols indicated as uplink by such configuration may be excluded from the lastsymbols prior to the first symbol of the PDCCH reception in the slot. The resulting set of symbols includes N_INT symbols.

In some embodiments, the UE does not expect to be provided values of μ, μ_INT, and T_INT resulting to a value ofthat is not an integer. In some embodiments, the UE does not expect to be configured with more than one PDCCH monitoring occasion for DCI format 2_1 in a slot.

In some embodiments, there may be several levels of granularities of the pre-emption indication (e.g., for RB set #A and symbol set #A) . In some embodiments, the specific granularity may be indicated by a higher layer parameter (e.g., timeFrequencySet as specified in 3GPP specifications) . For brevity, the parameter is hereinafter referred to as granularity indication.

In some embodiments, when the value of the granularity indication is set to a first value (e.g., “timeFrequencySet = 'set0' ” as specified in 3GPP specifications) , symbol set #A may be divided into a first number of groups of consecutive symbols (e.g., 14 groups) . Each bit in a field (e.g., a field for the pre-emption indication) in the DCI format 2_1 may correspond to one of the 14 symbol groups. For example, 14 bits from the most significant bit (MSB) of the field have a one-to-one mapping with the 14 symbol groups, where each of the firstsymbol groups includessymbols, and each of the lastsymbol groups includessymbols. A bit value of “0” may indicate a transmission to the UE in the corresponding symbol group, and a bit value of “1” may indicate no transmission to the UE in the corresponding symbol group; or vice versa.

In some embodiments, when the value of the granularity indication is set to a second value (e.g., “timeFrequencySet = 'set1' ” as specified in 3GPP specifications) , symbol set #A may be divided into a second number of groups of consecutive symbols (e.g., 7 groups) . Each part of bits in a field (e.g., a field for the pre-emption indication) in the DCI format 2_1 may correspond to one of the 7 symbol groups. For example, 7 pairs of bits from the MSB of the field have a one-to-one mapping with 7 symbol groups, where each of the firstsymbol groups includessymbols, and each of the lastsymbol groups includessymbols. A first bit in a pair of bits for a symbol group is applicable to the subset of firstRBs from RB #A (which includes B_INT RBs) , and a second bit in the pair of bits for the symbol group is applicable to the subset of lastRBs from RB #A. A bit value of “0” may indicate a transmission to the UE in the corresponding symbol group and subset of RBs, and a bit value of “1” may indicate no transmission to the UE in the corresponding symbol group and subset of RBs; or vice versa.

FIG. 2 illustrates an exemplary DL inter-UE multiplexing in accordance with some embodiments of the present disclosure. For simplicity, it is assumed that a slot includes 14 symbols in the context of the present disclosure.

In the example of FIG. 2, it is assumed thatsymbols, which are symbols 0 to 13 of slot #n as shown in FIG. 2. In addition, according to the slot format configuration, the last 3 symbols of slot #n are uplink symbols. Therefore, symbol set #A in the example of FIG. 2 includes N_INT=11 symbols, i.e., symbols 0 to 10 of slot #n.

Assuming that UE #A1 would receive an eMBB service and UE #A2 would receive a URLLC service from a BS. As shown in FIG. 2, the URLLC service occupies a part of the resource (e.g., several symbols) for the eMBB service. The BS may transmit to UE #A1 a DCI indicating the pre-emption resource occupied by the URLLC service. The DCI may be transmitted in a slot after slot #n.

In some embodiments, when the granularity indication is set to the first value (e.g., “timeFrequencySet = 'set0' ” ) , 14 bits from the MSB of a field in the DCI have a one-to-one mapping with 14 groups of consecutive symbols from symbol set #A, where each of the first 11 symbol groups includes 1 symbols, and each of the last 3 symbol groups includes 0 symbols. In the example shown in FIG. 2, the field in the DCI may indicate “11001100011111” , wherein bit value “0” indicates a transmission to UE #A1 in the corresponding symbol group and bit value “1” indicates no transmission to UE #A1 in the corresponding symbol group.

In some embodiments, when the granularity indication is set to the second value (e.g., “timeFrequencySet = 'set1' ” ) , 7 pairs of bits from the MSB of a field in the DCI have a one-to-one mapping with 7 groups of consecutive symbols from symbol set #A, where each of the first 4 symbol groups includes 2 symbols, each of the last 3 symbol groups includes 1 symbol. A first bit in a pair of bits for a symbol group is applicable to the subset of firstRBs from RB set #A (which include B_INT RBs) , and a second bit in the pair of bits for the symbol group is applicable to the subset of lastRBs from RB set #A. In the example shown in FIG. 2, the field in the DCI may indicate “11 00 11 00 00 11 11” , wherein bit value “0” indicates a transmission to UE #A1 in the corresponding symbol group and subset of RBs, and bit value “1” indicates no transmission to UE #A1 in the corresponding symbol group and subset of RBs.

UL inter-UE multiplexing

In some embodiments of the present disclosure, a BS may inform a UE (e.g., UE #B1) to cancel a UL transmission (s) in RBs (e.g., PRBs) and in symbols that are indicated by a certain DCI format (for brevity, referred to as DCI format 2_4) , from a region for cancellation indication. For clarity, such indication may also be referred to as cancellation indication in the context of the present disclosure.

In some examples, the region for cancellation indication may be determined based on a higher layer parameter (s) . For simplicity, the RBs and the symbols of the region are referred to as RB set #B and symbol set #B, respectively.

For example, a higher layer parameter (e.g., timeFrequencyRegion as specified in 3GPP specification) may indicate RB set #B (e.g., by frequencyRegionforCI in timeFrequencyRegion as specified in 3GPP specification) . Symbol set #B may be determined by excluding symbols for reception of SS/PBCH blocks and DL symbols indicated by a slot format configuration (e.g., tdd-UL-DL-ConfigurationCommon) , if any, from the symbols provided by the higher layer parameter (e.g., by timeDurationforCI in timeFrequencyRegion as specified in 3GPP specification) . In some other examples, symbol set #B may be related to (e.g., equal to) the PDCCH monitoring periodicity. For example, symbol set #B may be determined by excluding symbols for reception of SS/PBCH blocks and DL symbols indicated by a slot format configuration (e.g., tdd-UL-DL-ConfigurationCommon) , if any, from the PDCCH monitoring periodicity.

In some embodiments, the region for cancellation indication may be divided into “a grid” in the frequency domain and time domain, and the cancellation indication in DCI format 2_4 may indicate whether a UL transmission in each block of the plurality of blocks in the “grid” should be cancelled or not. For example, a bit value of “0” may indicate that a UL transmission to the BS in the corresponding block (if any) should not be cancelled, and a bit value of “1” may indicate that a UL transmission to the BS in the corresponding block should be cancelled; or vice versa.

For example, when a UE is provided with a parameter for uplink cancellation (e.g., UplinkCancellation as specified in 3GPP specifications) , the UE is provided, in one or more serving cells, search space sets for monitoring the first PDCCH candidate (e.g., with a certain control channel element (CCE) aggregation level (e.g., L_CI CCEs as specified in 3GPP specifications) ) of each search space set for detection of a DCI format 2_4 with a cancellation indication (CI) radio network temporary identifier (RNTI) (CI-RNTI) .

The parameter for uplink cancellation (e.g., UplinkCancellation) may additionally provide one or more of the following to the UE:

- a set of serving cells (e.g., by ci-ConfigurationPerServingCell as specified in 3GPP specifications) that includes a set of serving cell indexes and a corresponding set of locations for fields in DCI format 2_4 (e.g., by positionInDCI as specified in 3GPP specifications) ;

- a number of fields in a DCI format 2_4 (e.g., by positionInDCI-forSUL as specified in 3GPP specifications) , for each serving cell for a supplementary UL (SUL) carrier, if the serving cell is configured with a SUL carrier

- an information payload size for DCI format 2_4 (e.g., by dci-PayloadSize-ForCI as specified in 3GPP specifications) ; and

- an indication for time-frequency resources (e.g., by timeFrequencyRegion as specified in 3GPP specifications) .

For a serving cell having an associated field in a DCI format 2_4, for the field denoted by

- N_CI, which denotes a number of bits for the cancellation indication in the DCI format (e.g., can be provided by ci-PayloadSize as specified in 3GPP specifications)

- B_CI, which denotes a number of RBs (e.g., can be provided by frequencyRegionforCI in timeFrequencyRegion as specified in 3GPP specifications)

- T_CI, which denotes a number of symbols, excluding symbols for reception of SS/PBCH blocks and DL symbols indicated by a slot format configuration (e.g., tdd-UL-DL-ConfigurationCommon) , from a number of symbols that

- is provided by a higher layer parameter (e.g., timeDurationforCI in timeFrequencyRegion as specified in 3GPP specifications) , if the PDCCH monitoring periodicity for the search space set with the DCI format 2_4 is one slot and there are more than one PDCCH monitoring occasions in a slot, or

- is equal to the PDCCH monitoring periodicity, otherwise.

- G_CI, which denotes a number of partitions for the T_CI symbols (e.g., can be provided by timeGranularityforCI in timeFrequencyRegion as specified in 3GPP specifications)

G_CI sets of bits from the MSB of the N_CI bits (e.g., the cancellation indication) have a one-to-one mapping with G_CI groups of symbols where each of the first groups includessymbols and each of the remaining groups includessymbols. A UE determines a symbol duration with respect to a SCS configuration of an active DL BWP where the UE monitors PDCCH for DCI format 2_4 detection.

For a group of symbols, N_BI=N_CI/G_CI bits from the MSB of each set of bits have a one-to-one mapping with N_BI groups of RBs, where each of the first groups includesRBs and each of the remaininggroups includesRBs. A UE determines a first RB index asand a number of contiguous RBs as B_CI=L_RB , from a higher layer parameter (e.g., frequencyRegionforCI as specified in 3GPP specifications) that indicates an offset RB_start and a length L_RB as resource indication value (RIV) , and from a higher layer parameter (e.g., offsetToCarrier in FrequencyInfoUL-SIB or FrequencyInfoUL as specified in 3GPP specifications) that indicates O_carrier for a SCS configuration of an active DL BWP where the UE monitors PDCCH for DCI format 2_4 detection.

An indication by a DCI format 2_4 for a serving cell may be applicable to a physical uplink shared channel (PUSCH) transmission or a sounding reference signal (SRS) transmission on the serving cell. In some examples, when the PUSCH transmission or the SRS transmission is scheduled by a DCI format, the indication by the DCI format 2_4 is applicable to the PUSCH transmission or SRS transmission only if the last symbol of the PDCCH reception providing the DCI format is earlier than the first symbol of the PDCCH reception providing the DCI format 2_4.

For the serving cell, the UE determines the first symbol of the T_CI symbols to be the first symbol that is after T′_proc, 2 from the end of a PDCCH reception where the UE detects the DCI format 2_4. The definition of T′_proc, 2 can be found in 3GPP specifications. For example, T′_proc, 2 is obtained from T_proc, 2 for PUSCH processing capability 2 assumingwhere d_offset is provided by delta_Offset, μ being the smallest SCS configuration between the SCS configuration of the PDCCH and the smallest SCS configuration μ_UL provided in scs-SpecificCarrierList of FrequencyInfoUL or FrequencyInfoUL-SIB. In some examples, the UE does not expect to cancel the PUSCH transmission or the SRS transmission before a corresponding symbol that is T_proc, 2 assuming that d_2, 1=0 after a last symbol of the PDCCH reception where the UE detects the DCI format 2_4.

A UE that detects a DCI format 2_4 for a serving cell may cancel a UL transmission, for example, a PUSCH transmission or an actual repetition of a PUSCH transmission if the PUSCH transmission is with repetition Type B or an SRS transmission on the serving cell if, respectively,

- the transmission is PUSCH with priority 0, if the UE is provided with uplink cancellation priority (e.g., by uplinkCancellationPriority as specified in 3GPP specifications) ,

- a group of symbols, from the T_CI symbols, has at least one bit value of “1” in the corresponding set of N_BI bits in the DCI format 2_4 and includes a symbol of the (repetition of the) PUSCH transmission or of the SRS transmission, and

- a group of RBs, from the B_CI RBs, has a corresponding bit value of “1” in the set of bits corresponding to the group of symbols in the DCI format 2_4 and includes an RB of the (repetition of the) PUSCH transmission or of the SRS transmission,

where

- the cancellation of the (repetition of the) PUSCH transmission includes all symbols from the earliest symbol of the (repetition of the) PUSCH transmission that is in a group of symbols having corresponding bit values of “1” in the DCI format 2_4;

- the cancellation of the SRS transmission includes only symbols that are in one or more groups of symbols having corresponding bit values of “1” in the DCI format 2_4.

In some example, when, based on an indication by a DCI format 2_4, a UE cancels a PUSCH transmission or an SRS transmission, the UE does not expect to be scheduled by a second DCI format to transmit a PUSCH or an SRS over symbols that include symbols of the cancelled PUSCH transmission or SRS transmission, where the last symbol of the PDCCH reception providing the second DCI format is no earlier than the first symbol of the PDCCH reception providing the DCI format 2_4.

As mentioned before, in order to realize a superior data rate and reduce latency in a wireless system (e.g., 5G system) , a spectrum on higher frequency band is inevitable. However, a big question is how to overcome coverage reduction on such carriers. To solve the problem, a duplexing scheme that enables simultaneous use of downlink and uplink within a TDD carrier using a non-overlapping frequency resource at a BS side (which may be referred to as subband non-overlapping full duplex (SBFD) ) may be employed. A subband may refer to a bandwidth part (BWP) of a serving cell of a UE or a part of a BWP of a serving cell of a UE. In some examples, a BS may simultaneously perform a downlink transmission and an uplink transmission (for example, on different UEs) in an SBFD symbol or slot.

There may be four symbol formats in a system adopting the SBFD scheme. The four symbol formats include DL, flexible, SBFD, and UL. For example, a DL or UL symbol may mean that the transmission direction on this symbol is DL or UL. For example, a flexible symbol may mean that a UE cannot make any assumptions on the transmission direction of this symbol. For example, an SBFD symbol may mean that this symbol can support simultaneous DL and UL transmissions in the BS side. For example, a symbol being SBFD may mean the symbol being indicated as DL with a UL frequency region or a UL subband; the symbol being indicated as flexible with a UL frequency region or a UL subband; or the symbol being indicated as flexible and a DL reception and a UL reception being configured to be performed in the symbol simultaneously (e.g., configured by a BS for a UE) . For example, an SBFD symbol may include a UL frequency domain resource or UL subband and be initially indicated or configured by a high layer configuration or a slot format indicator (SFI) from a BS as downlink or flexible (for example, there could be at least two subbands or frequency domain regions with different transmission directions in this symbol) . For example, a BS may simultaneously perform a DL transmission and a UL reception in an SBFD symbol while a UE can only perform a DL reception or a UL transmission. For example, an SBFD symbol may be configured with a UL subband, a DL subband, a flexible subband or any combination thereof. For example, an SBFD symbol may include a UL subband configuration (e.g., UL subband 301 in FIG. 3) .

It should be noted that another name may be used to denote the SBFD symbol as described above, for example, a symbol with a UL frequency domain resource/region or a symbol with a UL subband. In the context of the present disclosure, a non-SBFD symbol may refer to a DL, flexible, or UL symbol. In some examples, a DL, flexible, or UL symbol may mean that a DL, flexible, or UL symbol without SBFD.

The definitions of the four symbol types may also be applied to a slot. That is, a slot may be a DL, flexible, SBFD, or UL slot. For example, a DL or UL slot may mean that the transmission direction on this slot is DL or UL. For example, a flexible slot may mean that a UE cannot make any assumptions on the transmission direction of this slot. For example, an SBFD slot may refer to a slot where all symbols in the slot are SBFD symbols.

FIG. 3 illustrates an exemplary SBFD scheme in accordance with some embodiments of the present disclosure.

Referring to FIG. 3, a UE may determine a slot format (a) for slot #n according to, for example, a higher layer configuration (e.g., a cell common UL/DL configuration or a UE specific UL/DL configuration) or an SFI. The UE may further receive signaling (e.g., a higher layer configuration or an SFI) , which may indicate at least one DL symbol, at least one flexible symbol, at least one DL slot, at least one flexible slot, or any combination thereof to be subband full duplex or subband non-overlapping full duplex. For example, the UE may receive signaling indicating a frequency domain resource and time domain resource of a UL subband or a UL frequency region for SBFD, which can override a DL symbol (s) , a flexible symbol (s) , or both. For example, the UE may be configured with a UL subband 301 and determine a slot format (b) for slot #n as shown in FIG. 3.

FIG. 4 illustrates an exemplary SBFD scheme in accordance with some embodiments of the present disclosure. In FIG. 4, the UE may be configured with UL subband 401. The UE may determine a slot format for slot #n as shown in FIG. 4, i.e., all symbols in slot #n are SBFD symbols.

As shown in FIG. 4, a URLLC service occupies a part of the resource for an eMBB service. It is assumed that the region defined by symbol set #A and RB set #A correspond to region 400 in FIG. 4. Therefore, the region for pre-emption indication includes UL subband 401 and DL subband 404 in FIG. 4. Symbol set #A includes symbols 0 to 13 of slot #n. Line 403 may substantially equally divide RB set #A in the frequency domain. For example, the difference between the number of RBs in region 400 above line 403 and the number of RBs in region 400 below line 403 is equal to 0 or 1 (e.g., +1 or -1) .

The UE may receive a DCI including a pre-emption indication corresponding to region 400. It is further assumed that the value of the granularity indication is set to the second value. Then, 7 pairs of bits (e.g., from the MSB) of the pre-emption indication field in the DCI format may have a one-to-one mapping with 7 group symbols of the 14 symbols in slot #n, where each group symbol includes 2 symbols. For example, the 7 group symbols may be {symbol 0, symbol 1} , {symbol 2, symbol 3} , {symbol 4, symbol 5} , {symbol 6, symbol 7} , {symbol 8, symbol 9} , {symbol 10, symbol 11} , and {symbol 12, symbol 13} . A first bit in a pair of bits for a symbol group is applicable to the subset of firstRBs from RB set #A (e.g., RBs in region 400 above line 403) , a second bit in the pair of bits for the symbol group is applicable to the subset of lastRBs from RB set #A (e.g., RBs in region 400 below line 403) .

In the example of FIG. 4, the DCI may indicate “11 01 11 01 11 11 11” , wherein bit value “0” indicates a transmission to the UE in the corresponding symbol group and subset of RBs, and bit value “1” indicates no transmission to the UE in the corresponding symbol group and subset of RBs.

It can be seen that there would be 7 bits (the second bit of each pair of bits) being wasted due to UL subband 401. This is because UL subband 401 cannot be used to transmit DL data anyway. Therefore, the indication of the occupied resource is not very accuracy. Moreover, in the example of FIG. 4, some resources (e.g., region 402) is not occupied by the URLCC service, nor indicated as not used by the eMBB service. If the URLLC resource could be indicate more accurate, more bits of eMBB could be used for decoding such that the eMBB would be correctly decoded and then no retransmission is need, which would increase the resource utilization. Therefore, to improve resource utilization, more accurate indication is desired.

The same or similar issue exists for UL cancellation indication or when the value of the granularity indication for pre-emption indication is set to other value (s) . For example, for UL, some RBs in the region for cancellation indication may be in a DL subband (or in other words, not in a UL subband (s) ) and thus cannot be used for UL transmission anyway. Therefore, it would be inefficient to indicate all the resource in the region for cancellation indication. More accurate indication is desired.

Embodiments of the present disclosure provide enhanced solutions for resource indication when SBFD is supported. The proposed solutions can solve at least the above-mentioned issues and can improve indication accuracy and resource utilization. More details on the embodiments of the present disclosure will be illustrated in the following text in combination with the appended drawings.

FIG. 5 illustrates a flow chart of exemplary procedure 500 for resource indication in an SBFD scenario in accordance with some embodiments of the present disclosure. Procedure 500 may be implemented by a UE (e.g., UE 101 as shown in FIG. 1) . Details described in all of the foregoing embodiments of the present disclosure are applicable for the embodiments shown in FIG. 5.

Referring to FIG. 5, in operation 511, the UE may determine a reference region, wherein D comprises a set of RBs in a frequency domain and a set of symbols in a time domain. In some embodiments of the present disclosure, the set of symbols may include at least one SBFD symbol. In some embodiments of the present disclosure, the set of symbols may include at least one SBFD slot.

In operation 513, the UE may receive a DCI, which indicates whether one or more RBs and one or more symbols in a resource (denotes as resource #C) are used for DL reception or not, or indicates whether one or more RBs and one or more symbols in the resource are used for UL transmission or not, wherein RBs in the frequency domain of the resource are determined based on the reference region.

In some embodiments of the present disclosure, resource #C may include the set of symbols in the time domain. For example, symbols in the time domain of resource #C is the set of symbols.

For example, the reference region may be the region for pre-emption indication as described above. The set of RBs and the set of symbols may be RB set #A and symbol set #A as described above. The DCI may be DCI format 2_1 as described above. Resource #C may include symbol set #A in the time domain.

For example, the reference region may be the region for cancellation indication as described above. The set of RBs and the set of symbols may be RB set #B and symbol set #B as described above. The DCI may be DCI format 2_4 as described above. Resource #C may include symbol set #B in the time domain.

Various methods may be employed to determine RBs in the frequency domain of resource #C based on the reference region (e.g., based on the frequency domain and the time domain of the reference region) .

In some embodiments of the present disclosure, the DCI indicates whether one or more RBs and one or more symbols are used for DL reception or not (e.g., the UE receives DCI format 2_1) , the RBs in the frequency domain of resource #C may be determined by removing RBs in a UL subband from the set of RBs (e.g., RB set #A) . In some embodiments of the present disclosure, the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not (e.g., the UE receives DCI format 2_4) , the RBs in the frequency domain of resource #C may be determined by removing RBs not in the UL subband (e.g., RBs in the DL subband) from the set of RBs (e.g., RB set #B) .

For example, in some embodiments of the present disclosure, when all symbols in the reference region are SBFD symbols, the RBs in the frequency domain of resource #C are determined by removing RBs in the UL subband from the set of RBs (e.g., RB set #A) , or by removing RBs not in the UL subband (e.g., RBs in the DL subband) from the set of RBs (e.g., RB set #B) .

For example, when the DCI indicates whether one or more RBs and one or more symbols are used for DL reception or not (e.g., the UE receives DCI format 2_1) , the RBs in the frequency domain of resource #C are determined by removing RBs in the UL subband from RB set #A in response to that all symbols in the reference region (e.g., the region for pre-emption indication) are SBFD symbols.

For example, when the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not (e.g., the UE receives DCI format 2_4) , the RBs in the frequency domain of resource #C are determined by removing RBs not in the UL subband (e.g., RBs in the DL subband) from RB set #B in response to that all symbols in the reference region (e.g., the region for cancellation indication) are SBFD symbols.

For example, in some embodiments of the present disclosure, when all slots in the reference region are SBFD slots, the RBs in the frequency domain of resource #C are determined by removing RBs in the UL subband from the set of RBs (e.g., RB set #A) , or by removing RBs not in the UL subband (e.g., RBs in the DL subband) from the set of RBs (e.g., RB set #B) .

In some embodiments of the present disclosure, in the case that at least one symbol in the reference region is not an SBFD symbol, the RBs in the frequency domain of resource #C are equal to the set of RBs. In some embodiments of the present disclosure, in the case that at least one slot in the reference region is not an SBFD slot, the RBs in the frequency domain of resource #C are equal to the set of RBs.

For example, when the DCI indicates whether one or more RBs and one or more symbols are used for DL reception or not (e.g., the UE receives DCI format 2_1) , the RBs in the frequency domain of resource #C are equal to RB set #A in response to that at least one symbol in the reference region (e.g., the region for pre-emption indication) is not an SBFD symbol.

For example, when the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not (e.g., the UE receives DCI format 2_4) , the RBs in the frequency domain of resource #C are equal to RB set #B in response to that at least one symbol in the reference region (e.g., the region for cancellation indication) is not an SBFD symbol.

For example, referring to FIG. 6, a UE may receive a DCI (e.g., DCI format 2_1) indicating whether one or more RBs and one or more symbols are used for DL reception or not. Reference region 600 may include two slots (e.g., slot #n and slot #n+1 in FIG. 6) in the time domain. As shown in FIG. 6, UL subband 601 is configured in slot #n, and therefore symbols 0 to 13 of slot #n are SBFD symbols and slot #n is an SBFD slot. However, none of symbols 0 to 13 of slot #n+1 is an SBFD symbol. Therefore, not all symbols of reference region 600 are SBFD symbols (or not all slots of reference region 600 are SBFD slots) . Therefore, according to the above embodiments, RBs in the frequency domain of resource #C is equal to that of reference region 600. Thus, resource #C is the same as reference region 600.

For example, referring to FIG. 4, reference region 400 may include one slot (e.g., slot #n in FIG. 4) in the time domain, and include DL subband 404 and UL subband 401. Therefore, all symbols of reference region 400 are SBFD symbols. Therefore, according to the above embodiments, RBs in the frequency domain of resource #C is equal to that of DL subband 404. Symbols in the time domain of resource #C includes symbols 0 to 13 of slot #n.

For example, referring to FIG. 7, a UE may receive a DCI (e.g., DCI format 2_1) indicating whether one or more RBs and one or more symbols are used for DL reception or not. Reference region 700 may include one slot (e.g., slot #n in FIG. 7) in the time domain. As shown in FIG. 7, no UL subband is configured in slot #n, and thus none of symbols 0 to 13 of reference region 700 is an SBFD symbol. Therefore, according to the above embodiments, RBs in the frequency domain of resource #C is equal to that of reference region 700. Thus, Resource #C is the same as reference region 700.

Referring back to FIG. 5, in some embodiments of the present disclosure, the set of symbols is divided into at least one symbol group in the time domain. For each of the at least one symbol group, in the case that all symbols in a symbol group are SBFD symbols, RBs in the frequency domain of resource #C in the symbol group are determined by removing RBs in the UL subband from the set of RBs (e.g., RB set #A) , or by removing RBs not in the UL subband (e.g., RBs in the DL subband) from the set of RBs (e.g., RB set #B) .

For example, when the DCI indicates whether one or more RBs and one or more symbols are used for DL reception or not (e.g., the UE receives DCI format 2_1) , symbol set #A can be divided into at least one symbol group (e.g., 14 or 7 symbol groups) in the time domain. For each symbol group, the RBs in the frequency domain of resource #C in a symbol group are determined by removing RBs in the UL subband from RB set #A in response to that all symbols in the symbol group are SBFD symbols.

For example, when the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not (e.g., the UE receives DCI format 2_4) , symbol set #B can be divided into at least one symbol group (e.g., G_CI symbol groups) in the time domain. For each symbol group, the RBs in the frequency domain of resource #C are determined by removing RBs not in the UL subband (e.g., RBs in the DL subband) from RB set #B in response to that all symbols in the symbol group are SBFD symbols.

In some embodiments of the present disclosure, the set of symbols is divided into at least one symbol group in the time domain. For each of the at least one symbol group, in the case that at least one symbol in a symbol group is not an SBFD symbol, RBs in the frequency domain of resource #C in the symbol group are equal to the set of RBs.

For example, when the DCI indicates whether one or more RBs and one or more symbols are used for DL reception or not (e.g., the UE receives DCI format 2_1) , symbol set #A can be divided into at least one symbol group (e.g., 14 or 7 symbol groups) in the time domain. For each symbol group, the RBs in the frequency domain of resource #C in a symbol group are equal to RB set #A in response to that at least one symbol in the symbol group is not an SBFD symbol.

For example, when the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not (e.g., the UE receives DCI format 2_4) , symbol set #B can be divided into at least one symbol group (e.g., G_CI symbol groups) in the time domain. For each symbol group, the RBs in the frequency domain of resource #C in a symbol group are equal to RB set #B in response to that at least one symbol in the symbol group is not an SBFD symbol.

For example, referring to FIG. 6, reference region 600 may include two slots (e.g., slot #n and slot #n+1 in FIG. 6) in the time domain. It is assumed that the value of the granularity for pre-emption indication is set to the first value. Therefore, according to the above embodiments, the symbols of reference region 600 can be divided into 14 symbol groups. The 14 symbol groups are {symbol 0 of slot #n, symbol 1 of slot #n} , {symbol 2 of slot #n, symbol 3 of slot #n} , {symbol 4 of slot #n, symbol 5 of slot #n} , {symbol 6 of slot #n, symbol 7 of slot #n} , {symbol 8 of slot #n, symbol 9 of slot #n} , {symbol 10 of slot #n, symbol 11 of slot #n} , {symbol 12 of slot #n, symbol 13 of slot #n} , {symbol 0 of slot #n+1, symbol 1 of slot #n+1} , {symbol 2 of slot #n+1, symbol 3 of slot #n+1} , {symbol 4 of slot #n+1, symbol 5 of slot #n+1} , {symbol 6 of slot #n+1, symbol 7 of slot #n+1} , {symbol 8 of slot #n+1, symbol 9 of slot #n+1} , {symbol 10 of slot #n+1, symbol 11 of slot #n+1} , and {symbol 12 of slot #n+1, symbol 13 of slot #n+1} , which are indexed as symbol group #0 to symbol group #13 for clarity.

Since UL subband 601 is configured in slot #n, RBs in the frequency domain of resource #C in symbol groups #0 to #6 are determined by removing RBs in UL subband 601 from RBs of reference region 600. Since UL subband 601 is configured in slot #n, RBs in the frequency domain of resource #C in symbol groups #0 to #6 are determined by removing RBs in UL subband 601 from RBs of reference region 600. RBs in the frequency domain of resource #C in symbol groups #7 to #13 are equal to RBs of reference region 600. The DCI indicates resource occupancy based on resource #C.

Referring back to FIG. 5, in some embodiments of the present disclosure, the number of removed RBs as mentioned above (e.g., removed from RB set #A to from RB set #B) may be determined based on an SCS configuration of the DL reception or UL transmission, and an SCS configuration of the UL subband. The relationship of the values of an SCS configuration and the SCSs can be found in 3GPP specifications. For example, the values of an SCS configuration μ = {0, 1, 2, 3, 4, 5, 6} may respectively indicate SCSs of {15 kHz, 30 kHz, 60 kHz, 120 kHz, 240 kHz, 480 kHz, 960kHz} .

For example, as described above, when the DCI indicates whether one or more RBs and one or more symbols are used for DL reception or not (e.g., the UE receives DCI format 2_1) , the RBs in the frequency domain of resource #C may be determined by removing RBs in a UL subband from RB set #A. In some examples, RB set #A may be the active DL BWP, which include X RBs. Assuming that μ is the SCS configuration of the active DL BWP (i.e., the SCS configuration of the DL reception) , μ₁ is the SCS configuration for the UL subband, and the UL subband (e.g., which overlaps the reference region) includes Y RBs, then the number of removed RBs may be equal toTherefore, the resulting number of RBs may beIn some examples, the UE does not expect to be provided values of μ, μ₁, and Y resulting to a value ofthat is not an integer.

For example, as described above, when the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not (e.g., the UE receives DCI format 2_4) , the RBs in the frequency domain of resource #C may be determined by removing RBs not in a UL subband (e.g., RBs in the DL subband) from RB set #B. In some examples, RB set #B may include B_CI RBs. (e.g., provided by frequencyRegionforCI in timeFrequencyRegion as specified in 3GPP specification) . Assuming that μ’ is the SCS configuration of the UL transmission, μ₁ is the SCS configuration for the UL subband, and the RBs not in the UL subband (e.g., or the DL subband which overlaps the reference region) includes Y’ RBs, then the number of removed RBs may be equal toTherefore, the resulting number of RBs may beIn some examples, the UE does not expect to be provided values of μ’, μ₁, and Y’ resulting to a value ofthat is not an integer.

In some embodiments of the present disclosure, there may be a guard band between a UL subband and a DL subband. From the perspective of the UE, the guard band may not be used for UL transmission or DL reception. From the perspective of the BS, the guard band may not be used for DL transmission to the UE or UL reception from the UE. For example, region 400 in FIG. 4 may include a guard band inserted between UL subband 401 and DL subband 404. For example, the guard band may occupy the same symbols in the time domain as UL subband 401.

The above descriptions regarding RBs removing may also be applied to the guard band. For example, the UE may additionally remove RBs in a guard band from the set of RBs (e.g., RB set #A or RB set #B) .

For example, in some embodiments of the present disclosure, the DCI may indicate whether one or more RBs and one or more symbols are used for DL reception or not (e.g., the UE receives DCI format 2_1) , the RBs in the frequency domain of resource #C are determined by removing RBs in a guard band from the set of RBs (e.g., RB set #A) . In some embodiments of the present disclosure, the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not (e.g., the UE receives DCI format 2_4) , the RBs in the frequency domain of resource #C are determined by removing RBs in a guard band from the set of RBs (e.g., RB set #B) . The guard band is inserted between a UL subband and a DL subband in the reference region.

For example, in some embodiments of the present disclosure, when all symbols in the reference region are SBFD symbols, the RBs in the frequency domain of resource #C are determined by removing RBs in the guard band from the set of RBs (e.g., RB set #A or RB set #B) . For example, in some embodiments of the present disclosure, when all slots in the reference region are SBFD slots, the RBs in the frequency domain of resource #C are determined by removing RBs in the guard band from the set of RBs (e.g., RB set #A or RB set #B) .

For example, in some embodiments of the present disclosure, the set of symbols is divided into at least one symbol group in the time domain. For each of the at least one symbol group, in the case that all symbols in a symbol group are SBFD symbols, RBs in the frequency domain of resource #C in the symbol group are determined by removing RBs in the guard band from the set of RBs (e.g., RB set #A or RB set #B) .

In some embodiments of the present disclosure, the UE may receive an indication indicating another set of RBs (denoted as RB set #D) . Depending on the set of symbols in the reference region (e.g., symbol set #A or symbol set #B) , the RBs in the frequency domain of Resource #C may be equal to RB set #D or the set of RBs (e.g., RB set #A or RB set #B) .

For example, in some embodiments of the present disclosure, when all symbols in the reference region are SBFD symbols, the RBs in the frequency domain of resource #C are equal to RB set #D; otherwise, the RBs in the frequency domain of resource #C are equal to the set of RBs (e.g., RB set #A or RB set #B) .

For example, in some embodiments of the present disclosure, when all slots in the reference region are SBFD slots, the RBs in the frequency domain of resource #C are equal to RB set #D; otherwise, the RBs in the frequency domain of resource #C are equal to the set of RBs (e.g., RB set #A or RB set #B) .

For example, referring to FIG. 6, reference region 600 may include two slots (e.g., slot #n and slot #n+1 in FIG. 6) in the time domain. As shown in FIG. 6, symbols 0 to 13 of slot #n are SBFD symbols and none of symbols 0 to 13 of slot #n+1 is an SBFD symbol. Therefore, according to the above embodiments, resource #C is the same as reference region 600.

For example, referring to FIG. 4, reference region 400 may include one slot (e.g., slot #n in FIG. 4) in the time domain, and include DL subband 404 and UL subband 401. All symbols of reference region 400 are SBFD symbols. Therefore, according to the above embodiments, RBs in the frequency domain of resource #C is equal to RB set #D. Symbols in the time domain of resource #C includes symbols 0 to 13 of slot #n.

For example, referring to FIG. 7, reference region 700 may include one slot (e.g., slot #n in FIG. 7) in the time domain. As shown in FIG. 7, no UL subband is configured in slot #n. Therefore, according to the above embodiments, RBs in the frequency domain of resource #C is equal to RBs of reference region 600 (e.g., RB set #A) . Symbols in the time domain of resource #C includes symbols 0 to 13 of slot #n.

Referring back to FIG. 5, in some embodiments of the present disclosure, the set of symbols is divided into at least one symbol group. For each of the at least one symbol group, in the case that all symbols in a symbol group are SBFD symbols, RBs in the frequency domain of resource #C in the symbol group are equal to RB set #D; otherwise, the RBs in the frequency domain of resource #C in the symbol group are equal to the set of RBs (e.g., RB set #A or RB set #B) .

Since UL subband 601 is configured in slot #n, RBs in the frequency domain of resource #C in symbol groups #0 to #6 are determined by removing RBs in UL subband 601 from RBs of reference region 600. Since UL subband 601 is configured in slot #n, RBs in the frequency domain of resource #C in symbol groups #0 to #6 are equal to RB set #D. RBs in the frequency domain of resource #C in symbol groups #7 to #13 are equal to RBs of reference region 600 (e.g., RB set #A) .

Referring back to FIG. 5, in some embodiments of the present disclosure, resource #C may include the set of symbols in the time domain. For example, symbols in the time domain of resource #C is the set of symbols (i.e., symbols in the time domain of the reference region which can be symbol set #A or symbol set #B) .

The DCI indicates resource occupancy based on resource #C.

For example, in some embodiments of the present disclosure, resource #C is divided into a plurality of parts in the frequency domain. For example, each of the plurality of parts may include substantially the same number of RBs (i.e., being evenly divided) . For example, the difference in RB number of any two parts of the plurality of parts may not be greater than 1. In some embodiments, resource #C is divided into two parts in the frequency domain. In some embodiments, resource #C is divided into N_BI parts in the frequency domain.

The set of symbols is divided into at least one symbol group. The DCI (e.g., the pre-emption indication field or the cancellation indication field in the DCI) includes an indicator for each of the at least one symbol group. For example, the indicator may be a pair of bits or a bitmap. In some embodiments, each bit of the indicator indicates whether a corresponding part of the plurality of parts in a symbol group is used for DL reception or not. In some embodiments, each bit of the indicator indicates whether the corresponding part of the plurality of parts in the symbol group is used for UL transmission or not.

For example, referring to FIG. 6, reference region 600 may include two slots (e.g., slot #n and slot #n+1 in FIG. 6) in the time domain. UL subband 601 is only configured in slot #n. Therefore, symbols 0 to 13 of slot #n are SBFD symbols and none of symbols 0 to 13 of slot #n+1 is an SBFD symbol. According to some embodiments of the present disclosure, since at least one symbol in reference region 600 is not an SBFD symbol, the RBs in the frequency domain of resource #C are RBs of reference region 600. It should be noted that the RBs in the frequency domain of resource #C can be determined according other methods as described above. In FIG. 6, the number of RBs of reference region 600 is denoted as RB number 605 and line 603 may substantially equally divide RBs in the frequency domain of reference region 600.

It is assumed that the value of the granularity for pre-emption indication is set to the second value. Therefore, the symbols of reference region 600 (also symbols of resource #C) can be divided into 7 symbol groups. For example, each of the firstsymbol groups includessymbols, and each of the lastsymbol groups includessymbols, where N_INT = 14*2. Therefore, the 7 symbol groups are {symbols 0-3 of slot #n} , {symbols 4-7 of slot #n} , {symbols 8-11 of slot #n} , {symbols 12 and 13 of slot #n, symbols 0 and 1 of slot #n+1} , {symbols 2-5 of slot #n+1} , {symbols 6-9 of slot #n+1} , and {symbols 10-13 of slot #n+1} , which are indexed as symbol group #0 to symbol group #6 for clarity.

Then, 7 pairs of bits from the MSB of the pre-emption indication field in the DCI (e.g., DCI format 2_1) have a one-to-one mapping with symbol group #0 to symbol group #6. For example, a first bit in a pair of bits for a symbol group is applicable to the subset of firstRBs (e.g., RBs in region 600 above line 603) from the set of B_INT RBs, a second bit in the pair of bits for the symbol group is applicable to the subset of lastRBs (e.g., RBs in region 600 below line 603) from the set of B_INT RBs, wherein B_INT = RB number 605.

For example, the pre-emption indication field may indicate “01 11 11 11 10 00 11” , where a bit value of 0 indicates transmission to the UE in the corresponding symbol group and subset of RBs, and a bit value of 1 indicates no transmission to the UE in the corresponding symbol group and subset of RBs.

For example, referring to FIG. 8, a UE may receive a DCI (e.g., DCI format 2_1) indicating whether one or more RBs and one or more symbols are used for DL reception or not. Reference region 800 may include one slot (e.g., slot #n in FIG. 8) in the time domain. As shown in FIG. 8, UL subband 801 is configured in slot #n, and therefore symbols 0 to 13 of slot #n are SBFD symbols and slot #n is an SBFD slot. According to some embodiments of the present disclosure, since all symbols in reference region 800 are SBFD symbols, the RBs in the frequency domain of resource #C are determined by removing RBs of UL subband 801 from RBs of reference region 800. It should be noted that the RBs in the frequency domain of resource #C can be determined according other methods as described above. In FIG. 8, the number of RBs of resource #C is denoted as RB number 805 and line 803 may substantially equally divide RBs in the frequency domain of resource #C.

It is assumed that the value of the granularity for pre-emption indication is set to the second value. Therefore, the symbols of reference region 800 (also symbols of resource #C) can be divided into 7 symbol groups. For example, each of the firstsymbol groups includessymbols, and each of the lastsymbol groups includessymbols, where N_INT = 14. Therefore, the 7 symbol groups are {symbol 0 of slot #n, symbol 1 of slot #n} , {symbol 2 of slot #n, symbol 3 of slot #n} , {symbol 4 of slot #n, symbol 5 of slot #n} , {symbol 6 of slot #n, symbol 7 of slot #n} , {symbol 8 of slot #n, symbol 9 of slot #n} , {symbol 10 of slot #n, symbol 11 of slot #n} , {symbol 12 of slot #n, symbol 13 of slot #n} , which are indexed as symbol group #0 to symbol group #6 for clarity.

Then, 7 pairs of bits from the MSB of the pre-emption indication field in the DCI (e.g., DCI format 2_1) have a one-to-one mapping with symbol group #0 to symbol group #6. For example, a first bit in a pair of bits for a symbol group is applicable to the subset of firstRBs (e.g., RBs in resource #C above line 803) from the set of B_INT RBs, a second bit in the pair of bits for the symbol group is applicable to the subset of lastRBs (e.g., RBs in resource #C below line 803) from the set of B_INT RBs, wherein B_INT = RB number 805.

For example, the pre-emption indication field may indicate “11 00 10 00 11 11 11” , where a bit value of 0 indicates transmission to the UE in the corresponding symbol group and subset of RBs, and a bit value of 1 indicates no transmission to the UE in the corresponding symbol group and subset of RBs.

Referring back to FIG. 5, in some embodiments of the present disclosure, resource #C or the reference region is divided into a first part and a second part in the frequency domain, and the first part and the second part are inserted by a UL subband. The set of symbols is divided into at least one symbol group, the DCI (e.g., the pre-emption indication field) includes a pair of bits for each of the at least one symbol group, a first bit of the pair of bits indicates whether the first part in a symbol group is used for DL reception or not, and a second bit of the pair of bits indicates whether the second part in the symbol group is used for DL reception or not. In some embodiments of the present disclosure, the first part and the second part are inserted by the UL subband and a guard band.

For example, referring to FIG. 9, a UE may receive a DCI (e.g., DCI format 2_1) indicating whether one or more RBs and one or more symbols are used for DL reception or not. Reference region 900 may include one slot (e.g., slot #n in FIG. 9) in the time domain. As shown in FIG. 9, UL subband 901 is configured in slot #n, and divides the reference region 900 into two parts along all symbols in the time domain of reference region 900. The number of RBs of the upper part is denoted as RB number 905 and the number of RBs of the lower part is denoted as RB number 907.

In some embodiments of the present disclosure, assuming that a guard band is inserted between a DL subband and UL subband 901 in FIG. 9 (e.g., between the upper DL part and UL subband 901, between the lower DL part and UL subband 901, or both) , neither RB number 905 nor RB number 907 includes RBs of the guard band.

It is assumed that the value of the granularity for pre-emption indication is set to the second value. Therefore, the symbols of reference region 900 can be divided into 7 symbol groups. For example, each of the firstsymbol groups includessymbols, and each of the lastsymbol groups includessymbols, where N_INT = 14. Therefore, the 7 symbol groups are {symbol 0 of slot #n, symbol 1 of slot #n} , {symbol 2 of slot #n, symbol 3 of slot #n} , {symbol 4 of slot #n, symbol 5 of slot #n} , {symbol 6 of slot #n, symbol 7 of slot #n} , {symbol 8 of slot #n, symbol 9 of slot #n} , {symbol 10 of slot #n, symbol 11 of slot #n} , {symbol 12 of slot #n, symbol 13 of slot #n} , which are indexed as symbol group #0 to symbol group #6 for clarity.

Then, 7 pairs of bits from the MSB of the pre-emption indication field in the DCI (e.g., DCI format 2_1) have a one-to-one mapping with symbol group #0 to symbol group #6. For example, a first bit in a pair of bits for a symbol group is applicable to the subset of first M RBs from the set of B_INT RBs, and a second bit in the pair of bits for the symbol group is applicable to the subset of last N RBs from the set of B_INT RBs, where M = RB number 905 and N = RB number 907 and B_INT denotes the number of RBs of the RBs in the frequency domain of resource #C or the number of RBs of the RBs in the frequency domain of reference region 900. In some example, the RBs in the frequency domain of resource #C are equal to that of reference region 900. In some example, the RBs in the frequency domain of resource #C are equal to M+N.

For example, the pre-emption indication field may indicate “11 01 10 01 11 11 11” , where a bit value of 0 indicates transmission to the UE in the corresponding symbol group and subset of RBs, and a bit value of 1 indicates no transmission to the UE in the corresponding symbol group and subset of RBs.

It should be appreciated by persons skilled in the art that the sequence of the operations in exemplary procedure 500 may be changed and some of the operations in exemplary procedure 500 may be eliminated or modified, without departing from the spirit and scope of the disclosure.

FIG. 10 illustrates a flow chart of an exemplary procedure 1000 for resource indication in an SBFD scenario in accordance with some embodiments of the present disclosure. Procedure 1000 may be implemented by a network entity (e.g., BS 102 as shown in FIG. 1) . Details described in all of the foregoing embodiments of the present disclosure are applicable for the embodiments shown in FIG. 10.

Referring to FIG. 10, in operation 1011, a BS may determine a reference region for a UE, wherein the reference region comprises a set of RBs in a frequency domain and a set of symbols in a time domain. In some embodiments of the present disclosure, the set of symbols may include at least one SBFD symbol. In some embodiments of the present disclosure, the set of symbols may include at least one SBFD slot.

For example, the reference region may be the region for pre-emption indication as described above. The set of RBs and the set of symbols may be RB set #A and symbol set #A as described above. The DCI may be DCI format 2_1 as described above. For example, the reference region may be the region for cancellation indication as described above. The set of RBs and the set of symbols may be RB set #B and symbol set #B as described above. The DCI may be DCI format 2_4 as described above.

In operation 1013, the BS may transmit, to the UE, a DCI, which indicates whether one or more RBs and one or more symbols in a resource are used for DL reception or not or indicates whether one or more RBs and one or more symbols in the resource are used for UL transmission or not, wherein RBs in the frequency domain of the resource are determined based on the reference region. The resource may be resource #C as describe above.

In some embodiments of the present disclosure, the DCI indicates whether one or more RBs and one or more symbols are used for DL reception or not (e.g., the BS transmits DCI format 2_1) , the RBs in the frequency domain of the resource are determined by removing RBs in a UL subband from the set of RBs (e.g., RB set #A) . In some embodiments of the present disclosure, the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not (e.g., the BS transmits DCI format 2_4) , the RBs in the frequency domain of the resource are determined by removing RBs not in the UL subband (e.g., RBs in the DL subband) from the set of RBs (e.g., RB set #B) .

In some embodiments of the present disclosure, when all slots in the reference region are SBFD slots, the RBs in the frequency domain of the resource are determined by removing RBs in the UL subband from the set of RBs, or by removing RBs not in the UL subband (e.g., RBs in the DL subband) from the set of RBs.

In some embodiments of the present disclosure, in the case that at least one symbol in the reference region is not an SBFD symbol, the RBs in the frequency domain of the resource are equal to the set of RBs. In some embodiments of the present disclosure, in the case that at least one slot in the reference region is not an SBFD slot, the RBs in the frequency domain of the resource are equal to the set of RBs.

In some embodiments of the present disclosure, there may be a guard band between a UL subband and a DL subband. From the perspective of the UE, the guard band may not be used for UL transmission or DL reception. From the perspective of the BS, the guard band may not be used for DL transmission to the UE or UL reception from the UE.

The above descriptions regarding RBs removing may also be applied to the guard band. For example, the BS may additionally remove RBs in a guard band from the set of RBs (e.g., RB set #A or RB set #B) .

For example, in some embodiments of the present disclosure, the DCI may indicate whether one or more RBs and one or more symbols are used for DL reception or not (e.g., the BS transmits DCI format 2_1) , the RBs in the frequency domain of the resource are determined by removing RBs in a guard band from the set of RBs (e.g., RB set #A) . In some embodiments of the present disclosure, the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not (e.g., the BS transmits DCI format 2_4) , the RBs in the frequency domain of the resource are determined by removing RBs in a guard band from the set of RBs (e.g., RB set #B) . The guard band is inserted between a UL subband and a DL subband in the reference region.

For example, in some embodiments of the present disclosure, when all symbols in the reference region are SBFD symbols, the RBs in the frequency domain of the resource are determined by removing RBs in the guard band from the set of RBs (e.g., RB set #A or RB set #B) . For example, in some embodiments of the present disclosure, when all slots in the reference region are SBFD slots, the RBs in the frequency domain of the resource are determined by removing RBs in the guard band from the set of RBs (e.g., RB set #A or RB set #B) .

For example, in some embodiments of the present disclosure, the set of symbols is divided into at least one symbol group in the time domain. For each of the at least one symbol group, in the case that all symbols in a symbol group are SBFD symbols, RBs in the frequency domain of the resource in the symbol group are determined by removing RBs in the guard band from the set of RBs (e.g., RB set #A or RB set #B) .

In some embodiments of the present disclosure, the BS may transmit an indication indicating a second set of RBs (e.g., RB set #D) . Depending on the set of symbols in the reference region, the RBs in the frequency domain of the resource are equal to the second set of RBs or the set of RBs.

In some embodiments of the present disclosure, when all slots in the reference region are SBFD slots, the RBs in the frequency domain of the resource are equal to the second set of RBs; otherwise, the RBs in the frequency domain of the resource are equal to the set of RBs.

It should be appreciated by persons skilled in the art that the sequence of the operations in exemplary procedure 1000 may be changed and some of the operations in exemplary procedure 1000 may be eliminated or modified, without departing from the spirit and scope of the disclosure.

FIG. 11 illustrates a block diagram of an exemplary apparatus 1100 according to some embodiments of the present disclosure. As shown in FIG. 11, the apparatus 1100 may include at least one processor 1106 and at least one transceiver 1102 coupled to the processor 1106. The apparatus 1100 may be a UE or a network entity such as a BS.

Although in this figure, elements such as the at least one transceiver 1102 and processor 1106 are described in the singular, the plural is contemplated unless a limitation to the singular is explicitly stated. In some embodiments of the present application, the transceiver 1102 may be divided into two devices, such as a receiving circuitry and a transmitting circuitry. In some embodiments of the present application, the apparatus 1100 may further include an input device, a memory, and/or other components.

In some embodiments of the present application, the apparatus 1100 may be a UE. The transceiver 1102 and the processor 1106 may interact with each other so as to perform the operations with respect to the UE described in FIGS. 1-10. In some embodiments of the present application, the apparatus 1100 may be a BS. The transceiver 1102 and the processor 1106 may interact with each other so as to perform the operations with respect to the BS described in FIGS. 1-10.

In some embodiments of the present application, the apparatus 1100 may further include at least one non-transitory computer-readable medium.

For example, in some embodiments of the present disclosure, the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 1106 to implement the method with respect to the UE as described above. For example, the computer-executable instructions, when executed, cause the processor 1106 interacting with transceiver 1102 to perform the operations with respect to the UE described in FIGS. 1-10.

In some embodiments of the present disclosure, the non-transitory computer-readable medium may have stored thereon computer-executable instructions to cause the processor 1106 to implement the method with respect to the BS as described above. For example, the computer-executable instructions, when executed, cause the processor 1106 interacting with transceiver 1102 to perform the operations with respect to the BS described in FIGS. 1-10.

Those having ordinary skill in the art would understand that the operations or steps of a method described in connection with the aspects disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. Additionally, in some aspects, the operations or steps of a method may reside as one or any combination or set of codes and/or instructions on a non-transitory computer-readable medium, which may be incorporated into a computer program product.

While this disclosure has been described with specific embodiments thereof, it is evident that many alternatives, modifications, and variations may be apparent to those skilled in the art. For example, various components of the embodiments may be interchanged, added, or substituted in other embodiments. Also, all of the elements of each figure are not necessary for the operation of the disclosed embodiments. For example, one of ordinary skill in the art of the disclosed embodiments would be enabled to make and use the teachings of the disclosure by simply employing the elements of the independent claims. Accordingly, embodiments of the disclosure as set forth herein are intended to be illustrative, not limiting. Various changes may be made without departing from the spirit and scope of the disclosure.

In this document, the terms "includes, " "including, " or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "a, " "an, " or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element. Also, the term "another" is defined as at least a second or more. The term "having" and the like, as used herein, are defined as "including. " Expressions such as "A and/or B" or "at least one of A and B" may include any and all combinations of words enumerated along with the expression. For instance, the expression "A and/or B" or "at least one of A and B" may include A, B, or both A and B. The wording "the first, " "the second" or the like is only used to clearly illustrate the embodiments of the present application, but is not used to limit the substance of the present application.

Claims

A user equipment (UE) , comprising:

a transceiver; and

a processor coupled to the transceiver, wherein the processor is configured to:

determine a reference region, wherein the reference region comprises a set of resource blocks (RBs) in a frequency domain and a set of symbols in a time domain, the set of symbols include at least one subband non-overlapping full duplex (SBFD) symbol; and

receive downlink control information (DCI) , which indicates whether one or more RBs and one or more symbols in a resource are used for downlink (DL) reception or not, or indicates whether one or more RBs and one or more symbols in the resource are used for uplink (UL) transmission or not, wherein RBs in the frequency domain of the resource are determined based on the reference region.
The UE of claim 1, wherein the DCI indicates whether one or more RBs and one or more symbols are used for DL reception or not, the RBs in the frequency domain of the resource are determined by removing RBs in a UL subband from the set of RBs; or

wherein the DCI indicates whether one or more RBs and one or more symbols are used for UL transmission or not, the RBs in the frequency domain of the resource are determined by removing RBs not in the UL subband from the set of RBs.
The UE of claim 2, wherein when all symbols in the reference region are SBFD symbols, the RBs in the frequency domain of the resource are determined by removing RBs in the UL subband from the set of RBs, or by removing RBs not in the UL subband from the set of RBs.
The UE of claim 2, wherein the set of symbols is divided into at least one symbol group in the time domain; and

for each of the at least one symbol group, in the case that all symbols in a symbol group are SBFD symbols, RBs in the frequency domain of the resource in the symbol group are determined by removing RBs in the UL subband from the set of RBs or by removing RBs not in the UL subband from the set of RBs.
The UE of claim 1, wherein in the case that at least one symbol in the reference region is not an SBFD symbol, the RBs in the frequency domain of the resource are equal to the set of RBs.
The UE of claim 1, wherein the set of symbols is divided into at least one symbol group in the time domain; and for each of the at least one symbol group, in the case that at least one symbol in a symbol group is not an SBFD symbol, RBs in the frequency domain of the resource in the symbol group are equal to the set of RBs.
The UE of any of claims 2-4, wherein the number of removed RBs is determined based on a subcarrier spacing (SCS) configuration of the DL reception or UL transmission, and an SCS configuration of the UL subband.
The UE of claim 1, wherein the processor is further configured to receive an indication indicating a second set of RBs, and

depending on the set of symbols in the reference region, the RBs in the frequency domain of the resource are equal to the second set of RBs or the set of RBs.
The UE of claim 8, wherein when all symbols in the reference region are SBFD symbols, the RBs in the frequency domain of the resource are equal to the second set of RBs; otherwise, the RBs in the frequency domain of the resource are equal to the set of RBs.
The UE of claim 8, wherein the set of symbols is divided into at least one symbol group; and

for each of the at least one symbol group, in the case that all symbols in a symbol group are SBFD symbols, RBs in the frequency domain of the resource in the symbol group are equal to the second set of RBs; otherwise, the RBs in the frequency domain of the resource in the symbol group are equal to the set of RBs.
The UE of any of claims 1, 2, or 8, wherein the resource comprises the set of symbols in the time domain.
The UE of Claim 11, wherein the resource is divided into a plurality of parts in the frequency domain; and

wherein the set of symbols is divided into at least one symbol group, the DCI comprises an indicator for each of the at least one symbol group, and each bit of the indicator indicates whether a corresponding part of the plurality of parts in a symbol group is used for DL reception or not, or indicates whether the corresponding part of the plurality of parts in the symbol group is used for UL transmission or not.
The UE of Claim 11, wherein the resource is divided into a first part and a second part in the frequency domain, and the first part and the second part are inserted by a UL subband; and

wherein the set of symbols is divided into at least one symbol group, the DCI comprises a pair of bits for each of the at least one symbol group, a first bit of the pair of bits indicates whether the first part in a symbol group is used for DL reception or not, and a second bit of the pair of bits indicates whether the second part in the symbol group is used for DL reception or not.
A base station (BS) , comprising:

a transceiver; and

a processor coupled to the transceiver, wherein the processor is configured to:

determine a reference region for a user equipment (UE) , wherein the reference region comprises a set of resource blocks (RBs) in a frequency domain and a set of symbols in a time domain, the set of symbols include at least one subband non-overlapping full duplex (SBFD) symbol; and

transmit, to the UE, downlink control information (DCI) , which indicates whether one or more RBs and one or more symbols in a resource are used for downlink (DL) reception or not or indicates whether one or more RBs and one or more symbols in the resource are used for uplink (UL) transmission or not, wherein RBs in the frequency domain of the resource are determined based on the reference region.
A method performed by a user equipment (UE) , comprising:

determining a reference region, wherein the reference region comprises a set of resource blocks (RBs) in a frequency domain and a set of symbols in a time domain, the set of symbols include at least one subband non-overlapping full duplex (SBFD) symbol; and

receiving downlink control information (DCI) , which indicates whether one or more RBs and one or more symbols in a resource are used for downlink (DL) reception or not, or indicates whether one or more RBs and one or more symbols in the resource are used for uplink (UL) transmission or not, wherein RBs in the frequency domain of the resource are determined based on the reference region.