Method and device for uplink resource allocation

Abstract

Embodiments of the present disclosure relate to methods and apparatus for uplink resource allocation. According to some embodiments of the present disclosure, a method may include: receiving downlink control information (DCI) in a downlink bandwidth part (BWP), wherein the DCI may schedule an uplink transmission in the uplink BWP; and transmitting the uplink transmission on at least one resource block (RB) set in a first plurality of RB sets based on the DCI in response to a successful channel access procedure for each of at least one RB set. Each of the first plurality of RB sets may include a plurality of adjacent RBs in the uplink BWP, and a guard band may be configured between two adjacent RB sets in the first plurality of RB sets.

Description

Technical Field

[0001] Embodiments of the present disclosure relate generally to wireless communication techniques, and more particularly, to uplink resource allocation scheduled by downlink control information (DCI). Background Art

[0002] A user equipment (UE) may monitor downlink control channels in one or more search spaces. For example, the UE may monitor the physical downlink control channel (PDCCH) in one or more search spaces associated with a control resource set (CORESET). The PDCCH may carry DCI, which may schedule uplink channels, such as the physical uplink shared channel (PUSCH), or downlink channels, such as the physical downlink shared channel (PDSCH).

[0003] Base stations (BSs) and UEs can operate in both licensed and unlicensed spectrum. Uplink resource allocations scheduled by DCI on the unlicensed spectrum need to be handled. Summary of the Invention

[0004] Some embodiments of the present disclosure provide a method. The method may include: receiving downlink control information (DCI) in a downlink bandwidth part (BWP), wherein the DCI may schedule an uplink transmission in an uplink BWP; and transmitting the uplink transmission on at least one resource block (RB) set in a first plurality of RB sets based on the DCI in response to a successful channel access procedure for each of at least one RB set, wherein each of the first plurality of RB sets may include a plurality of adjacent RBs in the uplink BWP, and a guard band may be configured between two adjacent RB sets in the first plurality of RB sets.

[0005] Some embodiments of the present disclosure provide a method. The method may include: transmitting downlink control information (DCI) in a downlink bandwidth part (BWP), wherein the DCI may schedule an uplink transmission in an uplink BWP; and receiving the uplink transmission on at least one resource block (RB) set in a first plurality of RB sets based on the DCI, wherein each of the first plurality of RB sets may include a plurality of adjacent RBs in the uplink BWP, and a guard band may be configured between two adjacent RB sets in the first plurality of RB sets.

[0006] 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 computer-executable instructions stored thereon; at least one receiving circuit system; at least one transmitting circuit system; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiving circuit system, and the at least one transmitting circuit system, wherein the at least one non-transitory computer-readable medium and the computer-executable instructions may be configured to, together 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

[0007] In order to describe the manner in which the advantages and features of the present disclosure can be obtained, the description of the present disclosure is presented by reference to specific embodiments of the present disclosure illustrated in the accompanying drawings. These drawings depict only exemplary embodiments of the present disclosure and therefore should not be considered to limit its scope.

[0008] Figure 1 A schematic diagram illustrating a wireless communication system according to some embodiments of the present disclosure;

[0009] Figure 2 An example of interleaving-based resource block configuration according to some embodiments of the present disclosure is described;

[0010] Figure 3 An example of carrier bandwidth configuration according to some embodiments of the present disclosure is described;

[0011] Figure 4 a flow chart illustrating an exemplary procedure for handling communications according to some embodiments of the present disclosure;

[0012] Figure 5 a flow chart illustrating an exemplary procedure for wireless communication according to some embodiments of the present disclosure;

[0013] Figure 6 a flowchart illustrating an exemplary procedure for wireless communication according to some embodiments of the present disclosure; and

[0014] Figure 7 A block diagram illustrating an exemplary apparatus according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0015] The detailed description of the accompanying 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 can be practiced. It should be understood that the same or equivalent functions can be achieved by different embodiments that are intended to be included in the spirit and scope of the present disclosure.

[0016] Reference will now be made in detail to certain embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. To facilitate understanding, the embodiments are provided in the context of specific network architectures and new service scenarios, such as 3rd Generation Partnership Project (3GPP) 5G (NR), 3GPP Long Term Evolution (LTE) Release 8, etc. It is contemplated that as network architectures and new service scenarios develop, all embodiments of the present disclosure may also be applicable to similar technical problems. Furthermore, the terminology used in the present disclosure may be modified without affecting the principles of the present disclosure.

[0017] Figure 1 A schematic diagram illustrating a wireless communication system according to some embodiments of the present disclosure.

[0018] As in Figure 1 As shown in FIG, a wireless communication system 100 may include a number of UEs 101 (e.g., UE 101a and UE 101b) and a base station (e.g., BS 102). Figure 1 A specific number of UEs 101 and BSs 102 are depicted in FIG. 1 , but it is contemplated that any number of UEs 101 and BSs 102 may be included in the wireless communication system 100 .

[0019] UE 101 may include a computing device, such as a desktop computer, a laptop computer, a personal digital assistant (PDA), a tablet computer, a smart TV (e.g., a TV connected to the Internet), a set-top box, a game console, a security system (including a surveillance camera), a vehicle onboard computer, a network device (e.g., a router, a switch, and a modem), or the like. According to some embodiments of the present disclosure, UE 101 may include a portable wireless communication device, a smart phone, a cellular phone, a flip phone, a device with a subscriber identity module, a personal computer, a selective call receiver, or any other device capable of sending and receiving communication signals on a wireless network. In some embodiments of the present disclosure, UE 101 includes a wearable device, such as a smart watch, a fitness band, an optical head-mounted display, or the like. In addition, UE 101 may be referred to as a subscriber unit, a mobile device, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a user station, a user terminal, or a device, or described using other terms used in the art. UE 101 may communicate with BS 102 via uplink (UL) communication signals.

[0020] BSs 102 may be distributed across a geographic area. In certain embodiments of the present disclosure, each of BSs 102 may also be referred to as an access point, access terminal, base station, base station unit, macrocell, Node-B, evolved Node B (eNB), gNB, home Node B, relay node, or device, or described using other terms used in the art. BSs 102 are typically part of a wireless access network, which may include one or more controllers communicatively coupled to one or more corresponding BSs 102. BSs 102 may communicate with UEs 101 via downlink (DL) communication signals.

[0021] The wireless communication system 100 may be compatible with any type of network capable of sending and receiving wireless communication signals. For example, the wireless communication system 100 is compatible with wireless communication networks, cellular telephone networks, time division multiple access (TDMA)-based networks, code division multiple access (CDMA)-based networks, orthogonal frequency division multiple access (OFDMA)-based networks, LTE networks, 3GPP-based networks, 3GPP 5G networks, satellite communication networks, high altitude platform networks, and / or other communication networks.

[0022] In some embodiments of the present disclosure, the wireless communication system 100 is compatible with the 5G NR of the 3GPP protocol. For example, the BS 102 may transmit data using an OFDM modulation scheme on the DL, and the UE 101 may transmit data using a discrete Fourier transform spread orthogonal frequency division multiplexing (DFT-S-OFDM) or cyclic prefix OFDM (CP-OFDM) scheme on the UL. However, more generally, the wireless communication system 100 may implement some other open or proprietary communication protocol, such as WiMAX or other protocols.

[0023] In some embodiments of the present disclosure, BS 102 and UE 101 may communicate using other communication protocols, such as the IEEE 802.11 family of wireless communication protocols. Furthermore, in some embodiments of the present disclosure, BS 102 and UE 101 may communicate via a licensed spectrum, while in other embodiments, BS 102 and UE 101 may communicate via an unlicensed spectrum. The present disclosure is not intended to be limited to implementation of any particular wireless communication system architecture or protocol.

[0024] Wireless transmissions on unlicensed spectrum must comply with regulatory requirements of the country / region where the wireless communication device (e.g., UE) is located. The design of the uplink waveform for the NR-U (NR system access on unlicensed spectrum) PUSCH (Physical Uplink Shared Channel) / PUCCH (Physical Uplink Control Channel) must comply with these regulatory requirements for unlicensed spectrum. These requirements mainly include two aspects:

[0025] (1) Occupied Channel Bandwidth (OCB): The bandwidth containing 99% of the signal's power should be between 80% and 100% of the declared nominal channel bandwidth; and

[0026] (2) Maximum power spectral density (PSD) with a resolution bandwidth of 1 MHz (e.g., 10 dBm / MHz).

[0027] The above two requirements indicate that a signal occupying a small portion of the channel bandwidth cannot be transmitted at the maximum available power at the UE due to PSD and OCB constraints.

[0028] To comply with regulatory requirements, an interleaved waveform is used as the uplink waveform for unlicensed spectrum. For example, in LTE and NR systems, an interleaved waveform can be applied to uplink (UL) transmissions on unlicensed spectrum.

[0029] In LTE, the bandwidth of a carrier is 20 MHz. This 20 MHz bandwidth can contain 100 physical resource blocks (PRBs), which are divided into 10 interlaces. Each interlace can contain 10 PRBs, and all interlaces can be evenly distributed across the entire bandwidth. In this way, each interlace spans more than 80% of the system bandwidth, making it possible to meet the regulatory requirements for OCBs. In addition, the 10 PRBs of an interlace are equally spaced in frequency, so that two adjacent PRBs of an interlace are separated by a distance of 1.8 MHz, and thus a power boost can be achieved for each PRB of an interlace.

[0030] In NR systems, an interlace as a frequency resource can be defined as a set of common resource blocks (CRBs), which can be evenly spaced in the frequency domain. For example, assuming there are M interlaces (indexed as 0, 1, ..., M-1), interlace m (m∈{0, 1, ..., M-1}) can be composed of CRBs {m, M+m, 2M+m, 3M+m, ...}. Interlace resource blocks (IRBs) in bandwidth part (BWP) i Interleaved with m and common resource blocks The corresponding relationship between is given by the following equation:

[0031]

[0032] in "μ" represents a common resource block where bandwidth part i starts relative to common resource block 0, and "μ" indicates a subcarrier spacing (SCS). For example, "μ = 0" may indicate an SCS of 15 kHz, "μ = 1" may indicate an SCS of 30 kHz, "μ = 2" may indicate an SCS of 60 kHz, and "μ = 3" may indicate an SCS of 120 kHz. When there is no risk of aliasing, the index μ in the above equations and parameters may be eliminated.

[0033] In some embodiments of the present disclosure, the number of interlaces distributed within the bandwidth of a carrier may be based solely on the subcarrier spacing, regardless of the bandwidth of the carrier. The subcarrier spacing for an NR system may be 15×2nkHz, where n is an integer. For frequency range 1 (FR1), the subcarrier spacing may be 15kHz, 30kHz, or 60kHz, and different subcarrier spacing values may support different maximum bandwidths. In some instances, for a carrier with 15kHz subcarrier spacing, there may be 10 interlaces on the carrier. In some instances, for a carrier with 30kHz subcarrier spacing, there may be 5 interlaces on the carrier. In some instances, for a carrier with 60kHz subcarrier spacing, there may be 2 or 3 interlaces on the carrier. It should be understood that the number of interlaces (e.g., 10 interlaces for a carrier with 15kHz subcarrier spacing, or 5 interlaces for a carrier with 30kHz subcarrier spacing) is for illustrative purposes only and should not be construed as limiting the embodiments of the present disclosure.

[0034] Table 1 below shows some examples of NR bandwidth configurations for different subcarrier spacings. According to Table 1, the maximum number of RBs (denoted as N in Table 1) can be determined based on the subcarrier spacing and the corresponding bandwidth. RB ). For example, if the bandwidth is 20 MHz and the subcarrier spacing (SCS) is 15 kHz, the maximum number of RBs may be 106; and if the bandwidth is 20 MHz and the SCS is 30 kHz, the maximum number of RBs may be 51. It should be understood that Table 1 is for illustrative purposes only and should not be construed as limiting the embodiments of the present disclosure.

[0035] Table 1

[0036]

[0037] In some embodiments of the present disclosure, the number of RBs per interlace on a carrier may depend on the bandwidth of the carrier. For example, referring to Table 1, if the carrier bandwidth is 20 MHz and the subcarrier spacing is 15 kHz, the maximum number of RBs included in the bandwidth may be 106. As mentioned above, for a carrier with a 15 kHz subcarrier spacing, there may be 10 interlaces on the carrier. Each of the 10 interlaces includes 10 or 11 RBs (106 / 10=10.6). If the carrier bandwidth is 20 MHz and the subcarrier spacing is 30 kHz, the maximum number of RBs included in the bandwidth may be 51. In this case, as mentioned above, for a carrier with a 30 kHz subcarrier spacing, there may be 5 interlaces on the carrier. Each of the 5 interlaces includes 10 or 11 RBs (51 / 5=10.2).

[0038] In some embodiments of the present disclosure, for carrier bandwidths greater than 20 MHz, the spacing between consecutive RBs in an interlace is maintained the same for all interlaces, regardless of the carrier bandwidth. In other words, the number of RBs per interlace can depend on the carrier bandwidth. Maintaining the same interlace spacing with increasing bandwidth is a straightforward way to scale interlace designs from 20 MHz to wider bandwidths.

[0039] For example, according to Table 1, if the carrier bandwidth is 80 MHz and the subcarrier spacing is 30 kHz, the maximum number of RBs included in the bandwidth can be 217. Furthermore, since the subcarrier spacing is 30 kHz, there are five interlaces on the carrier. In this case, each of the five interlaces can include 43 or 44 RBs (217 / 5=43.4).

[0040] Figure 2 An example of an interleaving-based resource block configuration 200 for 15 kHz subcarrier spacing according to some embodiments of the present disclosure is illustrated. It should be understood that configuration 200 is for illustrative purposes only and should not be construed as limiting the embodiments of the present disclosure.

[0041] As in Figure 2 As shown in FIG, the carrier bandwidth can be divided into resource blocks (RBs). Figure 2 Only RBs included in the carrier bandwidth are shown (e.g. Figure 2 The number of RBs in a carrier bandwidth is 2000 to 2035. A person skilled in the art can easily understand the number of RBs included in a certain carrier bandwidth by referring to, for example, Table 1 shown above. For example, if the carrier bandwidth is 15 MHz, the carrier bandwidth may include 79 RBs; and if the carrier bandwidth is 20 MHz, the carrier bandwidth may include 106 RBs.

[0042] As mentioned above, the number of interlaces distributed within the bandwidth of a carrier may be based solely on the subcarrier spacing, regardless of the bandwidth of the carrier. Figure 2 In the example of , the RB of the carrier bandwidth is divided into 10 interlaces (corresponding to 15kHz subcarrier spacing), which are Figure 2 They are represented by reference numerals 210, 211, 212, 213, 214, 215, 216, 217, 218 and 219 respectively.

[0043] Each of the 10 interlaces may include RBs that are evenly spaced in the frequency domain. The number of RBs included in each of the 10 interlaces may depend on the carrier bandwidth. Figure 2As shown in FIG, the interlace denoted by reference numeral 210 may include RB 2000, RB 2010, RB 2020, RB 2030, etc.; the interlace denoted by reference numeral 211 may include RB 2001, RB 2011, RB 2021, RB 2031, etc.; and the interlace denoted by reference numeral 219 may include RB 2009, RB 2019, RB 2029, etc. RB 2000 through RB 2035 may be indexed from “0” to “35” along the frequency axis, and the interlaces 210 through 219 may be indexed from “0” to “9”.

[0044] In NR-U, very wide bandwidths can be supported, for example, up to 100 MHz for FR1. The NR-U operating bandwidth can be an integer multiple of 20 MHz. To achieve fair coexistence between NR systems (e.g., NR-U systems) and other wireless systems (e.g., Wi-Fi), an unlicensed spectrum channel access procedure, also known as a listen-before-talk (LBT) test, can be performed in 20 MHz increments before communicating on the unlicensed spectrum. For carrier bandwidths greater than 20 MHz, such as 40 MHz, 60 MHz, 80 MHz, or 100 MHz, the carrier bandwidth can be divided into multiple subbands (also known as "LBT subbands"), each of which has a bandwidth of 20 MHz and can be indexed. An independent LBT test can be performed for each of these subbands (i.e., per subband). In some examples, one or more subbands can be scheduled for UL transmission. If the LBT test fails for any of the scheduled subbands, the UE may not perform an UL transmission (e.g., transmit a PUSCH). The UE may continue to perform another LBT test until a successful LBT test result is obtained. Only when the LBT tests on all scheduled subbands are successful can the UE start UL transmission and occupy the channel until the maximum channel occupation time (MCOT).

[0045] Figure 3 An exemplary bandwidth configuration of a carrier 300 according to some embodiments of the present disclosure is illustrated. The configuration may be used by a wireless device, for example, Figure 1 UE 101 and BS 102 are described.

[0046] exist Figure 3 In the embodiment of the present invention, the bandwidth of carrier 300 may be 80 MHz and may be divided into four sub-bands (e.g., sub-band 310, sub-band 311, sub-band 312, and sub-band 313). Each of the four sub-bands may have a bandwidth of 20 MHz. Sub-bands 310, 311, 312, and 313 within the carrier bandwidth may be indexed from "0" to "3" along the frequency axis.

[0047] At the edges of the carrier bandwidth, inter-carrier guard bands 320 and 321 may be specified to avoid interference between different operating carriers. In some cases, intra-carrier guard bands may also be specified between two adjacent sub-bands (e.g., Figure 3 The intra-carrier guard bands 330 to 332 in FIG. 3 . The intra-carrier guard bands 330 to 332 may be arranged according to various methods, such as by scheduling empty resource blocks that need to be protected.

[0048] Resource blocks (RBs) in a subband excluding the inter-carrier guard band and the intra-carrier guard band (if any) in the subband may be referred to as available RBs in the subband and may form an RB set. Figure 3 As shown in FIG, subband 310, subband 311, subband 312, and subband 313 may include RB set 340, RB set 341, RB set 342, and RB set 343, respectively, which may be indexed from "0" to "3" along the frequency axis and may be referred to as RB set 0, RB set 1, etc., respectively.

[0049] In some embodiments of the present disclosure, guard bands and RB sets are configured via radio resource control (RRC) signaling in CRB units. For example, when a UE is configured with RRC parameters for an uplink carrier (e.g., "intraCellGuardBandUL-r16"), RRC parameters for a downlink carrier (e.g., "intraCellGuardBandDL-r16"), or both, an intra-cell guard band may be provided to the UE on a carrier. As mentioned above, the intra-cell guard band may separate RB sets within a carrier. Assume that the number of RB sets in a carrier is N. RB-set , then the number of guard bands in the cell can be N RB-set -1. The RB sets in a carrier can be indexed as "0", "1", ..., "N RB-set -1". For example, refer to Figure 3 , N RB-set It may be 4 (eg, RB sets 340 to 343), and the number of intra-cell guard bands may be 3 (eg, intra-carrier guard bands 330 to 332).

[0050] Each of the guard bands in the cell can be started by and end Definition, and each of the RB sets can be started by and end Definition, where μ indicates the corresponding SCS of the carrier.

[0051] UE can Determine RB set 0 within the carrier bandwidth (e.g., Figure 3 The starting CRB of the RB set 340 in Determine the RB set N within the carrier bandwidthRB-set -1 (e.g., Figure 3 The end CRB of RB set 343 in , where represents the starting CRB on the carrier (i.e. the first available CRB on the carrier) and The carrier bandwidth is represented by the number of RBs on the carrier. and Determine the remaining start CRB and end CRB of the RB set, where s∈{0, 1, ..., N RB-set -2}.

[0052] In some embodiments of the present disclosure, the UE may not be configured with RRC parameters for the uplink carrier (e.g., "intraCellGuardBandUL-r16"), and the UE may select a carrier bandwidth size corresponding to μ as defined in 3GPP specification TS 38.101. The default intra-cell guard band mode is used to determine the intra-cell guard bandwidth and RB set.

[0053] In some embodiments of the present disclosure, the UE may not be configured with RRC parameters for the downlink carrier (e.g., "intraCellGuardBandDL-r16"), and the UE may be configured with RRC parameters corresponding to μ and carrier bandwidth size as defined in 3GPP specification TS 38.101. The default intra-cell guard band mode is used to determine the intra-cell guard bandwidth and RB set.

[0054] In some embodiments of the present disclosure, the configuration of the RRC parameters of the uplink carrier (e.g., "intraCellGuardBandUL-r16") and the RRC parameters of the downlink carrier (e.g., "intraCellGuardBandDL-r16") may indicate to the UE that the intra-cell guard band is not configured.

[0055] A UE may be configured with one or more carrier bandwidth parts (BWPs) for uplink or downlink communications. However, for a UE, there is at most one active downlink BWP and at most one active uplink BWP at a given time. The UE may communicate on an initial BWP during initial access until the UE is explicitly configured with a BWP during or after RRC connection establishment. A BWP may comprise a set of contiguous physical resource blocks (PRBs). These PRBs may be selected from a subset of a given number (μ) of contiguous CRBs on a given carrier. For carriers configured with intra-carrier guard bands, the UE may not expect to receive BWP configurations that partially overlap with a set of RBs (which may be signaled via RRC parameters such as "BWP-Downlink" and "BWP-Uplink"). The set of RBs within a BWP may form a cardinality. The set (S RB-sets ).

[0056] The 3GPP protocol specifies several types of uplink resource allocation (e.g., uplink resource allocation type 0, uplink resource allocation type 1, and uplink resource allocation type 2) to indicate the method used for uplink resource allocation in the frequency domain. The specific definitions of these resource allocation types are defined in 3GPP specification TS 38.214.

[0057] In uplink resource allocation type 2, frequency resource allocation information may be provided to the UE (e.g., in DCI) indicating a set of interlaces and, optionally, a set of RB sets. The UE may determine the resource allocation in the frequency domain (e.g., PRBs for PUSCH transmission) as the intersection of the RBs of the indicated interlace, the indicated set of RB sets, and the intra-cell guard band (if any) between the indicated RB sets.

[0058] In some embodiments of the present disclosure, when a higher layer (e.g., RRC) parameter (e.g., "useInterlacePUSCH-Dedicated-r16") regarding the use of interleaving is configured in a DCI (e.g., DCI format 01), (X+Y) bits may provide the frequency domain resource allocation mentioned above, where the X most significant bits (MSBs) may provide the interleaving allocation mentioned above, and the Y least significant bits (LSBs) may provide the RB set allocation mentioned above. These Y bits may also be referred to as an RB set indication.

[0059] In some examples, when the subcarrier spacing for the active uplink BWP is 15 kHz, the value of X may be equal to 6. In some examples, when the subcarrier spacing for the active uplink BWP is 30 kHz, the value of X may be equal to 5. It should be understood that the above-mentioned values of X are for illustrative purposes only and should not be construed as limiting the embodiments of the present disclosure.

[0060] In some examples, the value of Y can be based on OK, among them is an upper limit function, and is the number of RB sets contained in the active uplink BWP.

[0061] In some embodiments of the present disclosure, the frequency domain resource allocation information contained in DCI format 0_1 may indicate to the UE a set of up to M interlaces and a set of up to A set of consecutive RBs, where M represents the total number of interlaces depending on the subcarrier spacing (SCS), as mentioned above. For example, for a carrier with a 15kHz SCS, M may be equal to 10, and for a carrier with a 30kHz SCS, M may be equal to 5.

[0062] The number of RB sets may depend on the SCS and the maximum integer multiple of 20 MHz. In some embodiments of the present disclosure, the number of RB sets in a certain bandwidth may be the maximum integer less than or equal to the result of dividing the bandwidth by the bandwidth of the subband (e.g., 20 MHz).

[0063] For example, referring to Table 1 mentioned above, different SCS values can support different maximum bandwidths. In Table 1, a 15kHz SCS can support a maximum available bandwidth of 50MHz. Since a 50MHz bandwidth is not an integer multiple of a 20MHz bandwidth, a 50MHz bandwidth may not be supported for unlicensed spectrum. Therefore, the maximum bandwidth of a 15kHz SCS can be a 40MHz bandwidth, and for a carrier with a 15kHz SCS and a 40MHz bandwidth, there are two RB sets. A 30kHz SCS and a 60kHz SCS can support a maximum available bandwidth of 100MHz. Since a 100MHz bandwidth includes a maximum of five 20MHz bandwidths, there are a maximum of five RB sets for a 30kHz SCS and a 60kHz SCS.

[0064] According to the equation mentioned above for determining the value of Y, assuming that the number of RB sets in the uplink BWP is N, the number of bits required for the RB set indication is Since according to Table 1, there are a maximum of 2 RB sets (e.g., N=2) for 15kHz SCS, and a maximum of 5 RB sets (e.g., N=5) for 30kHz SCS and 60kHz SCS; in the case of 15kHz SCS, the RB set indication requires 2 bits (e.g., Y=2), and in the case of 30kHz SCS or 60kHz SCS, the RB set indication requires 4 bits (e.g., Y=4).

[0065] To decode a PDCCH (e.g., DCI), a UE may need to find several parameters, such as the control channel element (CCE) index, aggregation level, and scrambling code. Since the UE is not explicitly informed of these parameters, it may need to perform blind decoding in a predefined area (also known as a search space). There are two types of search spaces: a common search space (CSS) and a UE-specific search space (USS). The CSS carries common control information and can be monitored by all UEs in a cell or a group of UEs in a cell. The USS carries control information specific to a particular UE and can be monitored by a specific UE in a cell. 3GPP specifications specify several types of CSS, each of which can be applied to different applications. For example, a Type 1 PDCCH CSS can be employed during a random access (RA) procedure and can transmit DCI with a cyclic redundancy check (CRC) scrambled by, for example, the RA radio network temporary identifier (RNTI), a temporary cell RNTI (TC-RNTI), or a cell RNTI (C-RNTI) on the primary cell.

[0066] DCI formats 0-1 (also known as non-fallback DCI) and DCI format 0_0 (also known as fallback DCI) can be used to schedule uplink transmissions (e.g., PUSCH). As mentioned above, DCI format 0_1 may include X+Y bits for uplink frequency-domain resource allocation (e.g., including an interlace indication and an RB set indication). However, this may not be the case for fallback DCI.

[0067] In some embodiments of the present disclosure, when an uplink transmission is scheduled in a Type 1 PDCCH CSS using DCI format 0_0 with a CRC scrambled by the TC-RNTI, the active uplink BWP is always the initial uplink BWP. When an uplink transmission is scheduled using DCI format 0_0 with a CRC scrambled by the C-RNTI, the configured scheduling RNTI (CS-RNTI), or the modulation and coding scheme cell RNTI (MCS-C-RNTI), the uplink transmission may be scheduled in an active UL BWP that is different from the initial UL BWP. Because DCI format 0_0 does not support BWP switching, uplink transmissions scheduled by DCI format 0_0 in the CSS may not always be restricted in the initial uplink BWP. Therefore, DCI format 0_0 transmitted in the CSS may not indicate a specific RB set for the uplink transmission (i.e., may not include Y bits for the RB set indication).

[0068] In some embodiments of the present disclosure, DCI format 0_0 transmitted in the USS may or may not include the above-mentioned Y bits for RB set indication.

[0069] From a reliability perspective, fallback DCI should be sufficiently reliable to avoid unnecessary bits. In some cases, sacrificing scheduling flexibility or performance may be acceptable to ensure the reliability of fallback DCI. Furthermore, as mentioned above, the fallback DCI transmitted in the CSS may not include Y bits for the RB set indication. Therefore, when the fallback DCI transmitted in the USS includes such bits for the RB set indication, the fallback DCI transmitted in the CSS and the fallback DCI transmitted in the USS may have different payload sizes. In this case, since the UE may need to monitor four DCIs with different payload sizes, such as DCI format 0_0 in the CSS, DCI format 0_0, DCI format 0_1, and DCI format 1_1 in the USS, the maximum allowed different payload sizes for DCI (e.g., with a CRC scrambled by the C-RNTI) may be exceeded, which can be three. This may inevitably increase the UE's effort in blind detection. Therefore, it would be advantageous for the fallback DCI transmitted in the CSS and USS to not include the RB set indication.

[0070] However, in the case where the fallback DCI does not contain any RB set indication regardless of the transmission in the CSS or USS, this may be problematic when the active uplink BWP contains more than one RB set, because it may not be clear which of the more than one RB sets is used for the uplink transmission scheduled by the fallback DCI. Therefore, it is necessary to provide a solution for determining the RB set scheduled by the fallback DCI.

[0071] In some embodiments of the present disclosure, the UE may assume that the indicated interlace is transmitted on all RB sets in the active uplink BWP. Before the RRC connection is established, the initial uplink BWP may contain a single RB set. In this case, the above-mentioned issues can be properly resolved.

[0072] However, when the intra-cell guard band is reconfigured for a UE in CONNECTED mode, the UE behavior for PUSCH allocation during the ambiguity period may become unclear. In addition, in some cases, all RB sets in the active uplink BWP used for uplink transmission (e.g., PUSCH) may cause problems, such as: (1) too many resources may be scheduled for uplink transmission with a small packet size; and (2) the risk of LBT test is higher because the UE cannot transmit PUSCH if the LBT test fails for one subband or one RB set.

[0073] Therefore, there is a need to provide an improved solution for determining the RB set scheduled by the fallback DCI transmitted in the CSS or USS. In the following text, more details about the embodiments of the present disclosure will be explained in conjunction with the accompanying drawings.

[0074] Figure 4 A flowchart illustrating an exemplary procedure 400 for handling communications according to some embodiments of the present disclosure. Figure 4 The embodiment shown in .

[0075] Exemplary procedure 400 shows a procedure for a UE (e.g., UE 410) to communicate with a BS (e.g., BS 420). In some examples, UE 410 may be used as Figure 1 UE 101a or UE 101b in the UE 101a or UE 101b, and BS 420 can be used as Figure 1 BS 102.

[0076] refer to Figure 4 In operation 431, UE 410 may receive DCI from BS 420 in a downlink BWP. DCI may schedule uplink transmission (eg, PUSCH) in an uplink BWP. The uplink BWP may be similar to Figure 3 Configure it in the manner shown in .

[0077] For example, an uplink BWP may include multiple subbands, each of which may include an RB set. Thus, the uplink BWP may include multiple RB sets (hereinafter referred to as a "first plurality of RB sets" for clarity). The number of RB sets in the first plurality may be the largest integer less than or equal to the result of dividing the bandwidth of the uplink BWP by the bandwidth of the subband (e.g., 20 MHz). Each RB set may include multiple contiguous RBs in the uplink BWP. A guard band (e.g., an intra-carrier guard band) may be allocated between two adjacent RB sets. In some examples, an uplink BWP may include only one subband and one corresponding RB set.

[0078] In some embodiments of the present disclosure, UE 410 may determine, based on DCI, at least one RB set from the first plurality of RB sets in the uplink BWP for transmitting an uplink transmission. In some embodiments of the present disclosure, the DCI may be DCI format 0_1. DCI format 0_1 includes (X+Y) bits for uplink frequency-domain resource allocation. UE 410 may determine at least one RB set based on the Y bits indicated for the RB set.

[0079] In some embodiments of the present disclosure, the DCI may be DCI format 0_0. The DCI may include a frequency hopping flag having at least one bit. The frequency hopping flag may be reused to indicate an RB set for uplink transmission. For example, the frequency hopping flag may indicate at least one RB set for uplink transmission.

[0080] In some embodiments of the present disclosure, a frequency hopping flag may indicate one of two predefined RB sets in the first plurality of RB sets in the uplink BWP. In some embodiments of the present disclosure, the frequency hopping flag may indicate the number of RB sets from the two predefined RB sets in the first plurality of RB sets. In some embodiments of the present disclosure, the two predefined RB sets may be the two RB sets with the two lowest indices or the two lowest central frequency points in the first plurality of RB sets. In some other embodiments of the present disclosure, the two predefined RB sets may be determined from the first plurality of RB sets based on other criteria.

[0081] In some examples, according to Table 1 mentioned above, for an active uplink BWP with a 15kHz SCS, there are at most two RB sets in the active uplink BWP in FR1 for the 15kHz SCS. The two RB sets may be indexed as "0" and "1" and thus may be referred to as RB set 0 and RB set 1, respectively.

[0082] In some cases, a frequency hopping flag may indicate which of two RB sets is scheduled for uplink transmission. For example, the frequency hopping flag may comprise one bit. A value of "0" in the frequency hopping flag may indicate that RB set 0 is scheduled for uplink transmission, and a value of "1" in the frequency hopping flag may indicate that RB set 1 is scheduled for uplink transmission, or vice versa. In this example, since the frequency hopping flag comprises only one bit, only a single RB set can be scheduled for uplink transmission. However, as mentioned above, sacrificing scheduling flexibility or performance may be acceptable to ensure the reliability of fallback DCI.

[0083] In some cases, the frequency hopping flag may indicate the number of RB sets (e.g., 1 or 2) from the two RB sets used for uplink transmission. For example, the frequency hopping flag may include one bit. A value of "0" in the frequency hopping flag may indicate that only one of the two RB sets is scheduled for uplink transmission, and a value of "1" in the frequency hopping flag may indicate that both RB sets are scheduled for uplink transmission, or vice versa. When the frequency hopping flag indicates that only one RB set is scheduled for uplink transmission, the UE may determine that a predefined default RB set is scheduled for uplink transmission. In these cases, RB set 0 (or RB set 1) may be predefined as the default RB set.

[0084] In some examples, according to Table 1 mentioned above, for an active uplink BWP with a 30kHz or 60kHz SCS, there are a maximum of five RB sets in the active uplink BWP in FR1 for the 30kHz or 60kHz SCS. The five RB sets may be indexed as "0" to "4" and thus may be referred to as RB set 0 to RB set 4, respectively.

[0085] In some embodiments of the present disclosure, the two predefined RB sets may be the two RB sets with the lowest index or lowest central frequency point within the five RB sets. For example, the two predefined RB sets may be RB set 0 or RB set 1. In some other examples, the two predefined RB sets may be selected from the five RB sets based on other criteria.

[0086] In some cases, a frequency hopping flag may indicate which of two predefined RB sets (e.g., RB set 0 or RB set 1) is scheduled for uplink transmission. For example, the frequency hopping flag may comprise one bit. A value of "0" in the frequency hopping flag may indicate that RB set 0 is scheduled for uplink transmission, and a value of "1" in the frequency hopping flag may indicate that RB set 1 is scheduled for uplink transmission, or vice versa. In this example, since the frequency hopping flag comprises only one bit, only a single RB set can be scheduled for uplink transmission. However, as mentioned above, sacrificing scheduling flexibility or performance may be acceptable to ensure the reliability of fallback DCI.

[0087] In some cases, the frequency hopping flag may indicate the number of RB sets (e.g., 1 or 2) used for uplink transmission from two predefined RB sets. For example, the frequency hopping flag may include one bit. A value of "0" in the frequency hopping flag may indicate that only one of the two predefined RB sets is scheduled for uplink transmission, and a value of "1" in the frequency hopping flag may indicate that both predefined RB sets are scheduled for uplink transmission, or vice versa. When the frequency hopping flag indicates that only one RB set is scheduled for uplink transmission, the UE may determine that the default RB set is scheduled for uplink transmission. In these cases, one of the two predefined RB sets (e.g., RB set 0 or RB set 1) may be predefined as the default RB set.

[0088] In some embodiments of the present disclosure, the frequency hopping flag may indicate that the at least one RB set includes an RB set having an odd RB set index or an even RB set index in the first plurality of RB sets.

[0089] For example, for an active uplink BWP with a 15 kHz SCS, the frequency hopping flag may indicate the RB set with an odd RB set index of the two RB sets (eg, RB set 1) or the RB set with an even RB set index of the two RB sets (eg, RB set 0).

[0090] For example, for an active uplink BWP with a 30 kHz or 60 kHz SCS, the frequency hopping flag may indicate RB sets with odd RB set indices within the five RB sets or RB sets with even RB set indices within the five RB sets. For example, the frequency hopping flag may include one bit. A value of "0" in the frequency hopping flag may indicate that RB sets within the five RB sets with even RB set indices are scheduled for uplink transmission (e.g., RB set 0, RB set 2, and RB set 4 are scheduled), and a value of "1" in the frequency hopping flag may indicate that RB sets within the five RB sets with odd RB set indices are scheduled for uplink transmission (e.g., RB set 1 and RB set 3 are scheduled), or vice versa.

[0091] In some embodiments of the present disclosure, UE 410 may receive DCI in an RB set in a downlink BWP. The RB set in a downlink BWP may have an RB set index (eg, 1) and a central frequency point (eg, F).

[0092] In some embodiments of the present disclosure, one of the two predefined RB sets may have an RB set index equal to RB set index I, and the other of the two predefined RB sets may have an RB set index equal to I-1 or I+1.

[0093] After receiving DCI for RB set 1 in the active downlink BWP, UE 410 may determine that one predefined RB set is RB set 1 in the active uplink BWP, and the other predefined RB set is RB set 1+1 or RB set 1-1 in the active uplink BWP. The UE may further determine which of the two predefined RB sets in the uplink BWP to use for uplink transmission based on the DCI (e.g., a frequency hopping flag in the DCI). As mentioned above, in some examples, the frequency hopping flag may indicate one of the two predefined RB sets in the uplink BWP used for uplink transmission (e.g., RB set 1, RB set 1+1, or RB set 1-1). In some examples, the frequency hopping flag may indicate the number of RB sets (e.g., 1 or 2) from the two predefined RB sets in the uplink BWP used for uplink transmission.

[0094] In some embodiments of the present disclosure, one of the two predefined RB sets may have a central frequency point equal to the central frequency point F. Assuming that this predefined RB set has an RB set index PI, the other of the two predefined RB sets may have an RB set index equal to PI-1 or PI+1.

[0095] After receiving DCI for an RB set with a central frequency point F in the active downlink BWP, UE 410 may determine that one predefined RB set with the same central frequency point F is RB set PI in the active uplink BWP, and that the other predefined RB set is RB set PI+1 or RB set PI-1 in the active uplink BWP. The UE may further determine which of the two predefined RB sets in the uplink BWP to use for uplink transmission based on the DCI (e.g., a frequency hopping flag in the DCI). As mentioned above, in some examples, the frequency hopping flag may indicate one of the two predefined RB sets in the uplink BWP used for uplink transmission (e.g., RB set PI, RB set PI+1, or RB set PI-1). In some examples, the frequency hopping flag may indicate the number of RB sets (e.g., 1 or 2) from the two predefined RB sets in the uplink BWP used for uplink transmission.

[0096] In some embodiments of the present disclosure, the frequency hopping flag in the DCI may not be reused.At least one RB set in an uplink BWP for uplink transmission may be implicitly determined or predefined.

[0097] In some embodiments of the present disclosure, at least one RB set may include an RB set having an RB set index of 1, i.e., the index of the RB set in the downlink BWP used for DCI. For example, upon receiving DCI in RB set 1 in the active downlink BWP, UE 410 may determine that RB set 1 in the active uplink BWP is scheduled for uplink transmission.

[0098] In some embodiments of the present disclosure, at least one RB set may include an RB set having a central frequency point F, i.e., the central frequency point of the RB set in the downlink BWP used for DCI. For example, after receiving DCI in an RB set having a central frequency point F in an active downlink BWP, UE 410 may determine that an RB set PI having the same central frequency point F in an active uplink BWP is scheduled for uplink transmission.

[0099] In some embodiments of the present disclosure, at least one RB set may include a RB set with the lowest RB set index (eg, RB set 0) or the lowest central frequency point (eg, Figure 3 In some embodiments of the present disclosure, at least one RB set may include an RB set with the highest RB set index (e.g., RB set 4 of an uplink BWP with a 30kHz or 60kHz SCS) or the highest central frequency point (e.g., Figure 3 The RB set in the first multiple RB sets 343 in RB set 343).

[0100] In some embodiments of the present disclosure, the search space (CSS or USS) for DCI may include multiple RB sets (hereinafter referred to as the "second plurality of RB sets" for clarity). One of the second plurality of RB sets may be used as a reference RB set for determining at least one RB set in an uplink BWP. In some examples, assuming that the RB set in the second plurality of RB sets having the lowest central frequency point has an RB set index Z, the at least one RB set used to transmit an uplink transmission may include an RB set in the first plurality of RB sets in the uplink BWP having an RB set index Z. In some examples, the at least one RB set used to transmit an uplink transmission includes an RB set in the first plurality of RB sets in the uplink BWP having a central frequency point equal to the lowest central frequency point of the second plurality of RB sets.

[0101] In some of the above embodiments, the UE may implicitly determine the RB set used for uplink transmission based on the RB set in which DCI is transmitted. In these embodiments, the BS may ensure that the UE can transmit uplink transmissions on the determined RB set used for uplink transmissions. For example, when the active downlink BWP and the active uplink BWP have different numbers of RB sets, the BS may ensure that the index of the RB set in the active downlink BWP used to transmit DCI is no greater than the maximum index of the RB sets in the active uplink BWP. In other words, it may be undesirable for the UE to detect DCI in an RB set in the active downlink BWP that has an RB index greater than the maximum index of the RB sets in the active uplink BWP. In this case, if the UE determines to transmit an uplink transmission on an RB set in the uplink BWP that has the same RB set index as the RB set in which the DCI is transmitted, the UE may transmit the uplink transmission on this RB set in the uplink BWP.

[0102] After determining at least one RB set for uplink transmission, UE 410 may perform a channel access procedure (e.g., an LBT test) on each of the at least one RB set for transmitting uplink transmission. In response to the channel access procedure being successful for each of the at least one RB set, UE 410 may transmit uplink transmission on the at least one RB set in operation 433.

[0103] Those skilled in the art will appreciate that the sequence of operations in the exemplary process 400 may be changed, and some operations in the exemplary process 400 may be eliminated or modified without departing from the spirit and scope of the present disclosure.

[0104] Figure 5 A flowchart illustrating an exemplary procedure 500 for wireless communication according to some embodiments of the present disclosure. Figure 5The procedure may be performed by the UE, for example Figure 1 UE 101a or UE 101b in, or Figure 4 UE 410 in.

[0105] refer to Figure 5 In operation 511, the UE may receive DCI in a downlink BWP. The DCI may schedule uplink transmission (eg, PUSCH) in an uplink BWP. The uplink BWP may be similar to Figure 3 For example, an uplink BWP may include multiple RB sets, each of which may include multiple consecutive RBs in the uplink BWP. A guard band (e.g., an intra-carrier guard band) may be configured between two adjacent RB sets in the multiple RB sets.

[0106] After receiving the DCI, the UE may determine at least one RB set from among the multiple RB sets in the uplink BWP for transmitting uplink transmissions. Figures 1 to 4 The UE may determine at least one RB set using one of the methods described herein. The UE may perform a channel access procedure (e.g., an LBT test) on each of the at least one RB set. In response to the channel access procedure being successful for each of the at least one RB set, the UE may transmit an uplink transmission on the at least one RB set in operation 513.

[0107] Those skilled in the art will appreciate that the sequence of operations in the exemplary process 500 may be changed, and some operations in the exemplary process 500 may be eliminated or modified without departing from the spirit and scope of the present disclosure.

[0108] Figure 6 A flowchart illustrating an exemplary procedure 600 for wireless communication according to some embodiments of the present disclosure. Figure 6 The procedures may be performed by the BS, e.g. Figure 1 BS 102 or Figure 4 BS 420 in.

[0109] refer to Figure 6 In operation 611, the BS may transmit DCI in a downlink BWP. The DCI may schedule uplink transmission (eg, PUSCH) in an uplink BWP. The uplink BWP may be similar to Figure 3 For example, an uplink BWP may include multiple RB sets, each of which may include multiple consecutive RBs in the uplink BWP. A guard band (e.g., an intra-carrier guard band) may be configured between two adjacent RB sets in the multiple RB sets.

[0110] In operation 613, the BS may receive uplink transmissions on at least one RB set among the plurality of RB sets. The at least one RB set may be based on the above description of Figures 1 to 4 Determine by one of the methods described.

[0111] Those skilled in the art will appreciate that the sequence of operations in the exemplary process 600 may be changed, and some operations in the exemplary process 600 may be eliminated or modified without departing from the spirit and scope of the present disclosure.

[0112] Figure 7 An example block diagram illustrating a device 700 according to some embodiments of the present disclosure.

[0113] As in Figure 7 As shown in FIG. 7 , apparatus 700 may include at least one non-transitory computer-readable medium ( Figure 7 ), receiving circuit system 702, transmitting circuit system 704 and coupled to a non-transitory computer readable medium ( Figure 7 7. The apparatus 700 includes a processor 706 (not illustrated in the figure), a receiving circuit system 702, and a transmitting circuit system 704. The apparatus 700 can be a BS or a UE.

[0114] Although elements such as processor 706, transmit circuitry 704, and receive circuitry 702 are depicted in the singular in this figure, the plural may be contemplated unless explicitly limited to the singular. In some embodiments of the present disclosure, receive circuitry 702 and transmit circuitry 704 are combined into a single device, such as a transceiver. In certain embodiments of the present disclosure, apparatus 700 may further include an input device, memory, and / or other components.

[0115] In some embodiments of the present disclosure, a non-transitory computer-readable medium may store thereon computer-executable instructions to cause a processor to implement operations related to the UE as described above. For example, when the computer-executable instructions are executed, the processor 706 interacts with the receiving circuit system 702 and the transmitting circuit system 704 to facilitate the execution of the operations related to the UE. Figure 4 and 5 . For example, receive circuitry 702 may receive DCI in a downlink BWP. The DCI may schedule an uplink transmission (e.g., PUSCH) in an uplink BWP. Processor 706 may determine at least one RB set in the uplink BWP for transmitting the uplink transmission. Transmit circuitry 704 may transmit the uplink transmission on the at least one RB set.

[0116] In some embodiments of the present disclosure, a non-transitory computer-readable medium may store thereon computer-executable instructions to cause a processor to implement the method for the BS as described above. For example, when the computer-executable instructions are executed, the processor 706 interacts with the receiving circuit system 702 and the transmitting circuit system 704 to facilitate the execution of the method for the BS. Figure 4 and 6 For example, the transmit circuitry 704 may transmit a DCI in a downlink BWP. The DCI may schedule an uplink transmission (e.g., a PUSCH) in an uplink BWP. The receive circuitry 702 may receive the uplink transmission on at least one RB set in the uplink BWP.

[0117] Those skilled in the art will appreciate that the steps of the methods described in conjunction with the aspects disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of both. The 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 steps of the methods may reside as one or any combination or set of codes and / or instructions on a non-transitory computer-readable medium that may be incorporated into a computer program product.

[0118] Although the present disclosure has been described using specific embodiments of the present disclosure, it is apparent that many alternatives, modifications, and variations may be apparent to those skilled in the art. For example, in other embodiments, the various components of the embodiments may be interchangeable, added, or replaced. In addition, not all elements of each figure are required for the operation of the disclosed embodiments. For example, a person of ordinary skill in the art of the disclosed embodiments will be able to make and use the teachings of the present disclosure by simply adopting the elements of the independent claims. Therefore, the embodiments of the present disclosure set forth herein are intended to be illustrative, not restrictive. Various changes may be made without departing from the spirit and scope of the present disclosure.

[0119] In this document, term " comprising " or its any other variant wish to cover non-exclusive inclusion, make the process, method, article or equipment comprising a series of elements not only comprise described element, also can comprise other element that is not clearly listed or inherent to this process, method, article or equipment.In the case of no more constraints, the element that begins with " one " or the like does not exclude the existence of additional equivalent elements in the process, method, article or equipment comprising described element.In addition, term " another " is defined as at least second or more.Term " having " and the like as used herein are defined as " comprising ".

Claims

1. A method for wireless communication, comprising: receiving downlink control information DCI in a downlink bandwidth part BWP, wherein the DCI schedules uplink transmission in an uplink BWP; and in response to a channel access procedure being successful for each of at least one of a first plurality of resource block (RB) sets, transmitting the uplink transmission on the at least one RB set based on the DCI, wherein each of the first plurality of RB sets includes a plurality of adjacent RBs in the uplink BWP, and a guard band is configured between two adjacent RB sets in the first plurality of RB sets; and wherein the at least one RB set in the first plurality of RB sets comprises one or more of the following: an RB set having an RB set index equal to a first RB set index, the DCI being received in the RB set having the first RB set index in the downlink BWP; An RB set having a lowest RB set index or a lowest central frequency point among the first plurality of RB sets; or An RB set having a central frequency point equal to the lowest central frequency point of a second plurality of RB sets, and the search space of the DCI includes the second plurality of RB sets.

2. The method of claim 1, wherein the DCI is DCI format 0_0. 3 . The method of claim 1 , wherein the number of RB sets in the first plurality of RB sets is a maximum integer less than or equal to a result of dividing a bandwidth of the uplink BWP by a bandwidth of a subband. 4 . The method of claim 1 , wherein the DCI comprises a frequency hopping flag having at least one bit, and the frequency hopping flag indicates the at least one RB set used for the uplink transmission.

5. The method of claim 4, wherein the frequency hopping flag indicates one of two predefined RB sets in the first plurality of RB sets.

6. The method of claim 4, wherein the frequency hopping flag indicates a number of RB sets from two predefined RB sets of the first plurality of RB sets. 7 . The method according to claim 5 , wherein the two predefined RB sets are two RB sets having two lowest indexes or two lowest central frequency points in the first plurality of RB sets.

8. The method of claim 4, wherein the frequency hopping flag indicates that the at least one RB set comprises an RB set having an odd RB set index or an even RB set index among the first plurality of RB sets.

9. The method of claim 5 or 6, wherein one of the two predefined RB sets has an RB set index equal to the first RB set index, and the other of the two predefined RB sets has an RB set index equal to the first RB set index minus 1 or the first RB set index plus 1.

10. The method according to claim 5 or 6, wherein the DCI is received in a centralized manner in RBs having a first central frequency point in the downlink BWP; and One of the two predefined RB sets has a central frequency point equal to the first central frequency point and has a second RB set index, and the other of the two predefined RB sets has an RB set index equal to the second RB set index minus 1 or the second RB set index plus 1. 11 . The method according to claim 1 , wherein the DCI is received in an RB set having a first central frequency point in the downlink BWP, and the at least one RB set includes an RB set having a central frequency point equal to the first central frequency point. 12 . The method according to claim 1 , wherein the at least one RB set comprises an RB set having a highest RB set index or a highest central frequency point among the first plurality of RB sets.

13. The method of claim 1 , wherein the RB set having the lowest central frequency point in the second plurality of RB sets has a third RB set index; and The at least one RB set includes an RB set having an RB set index equal to the third RB set index.

14. A method for wireless communication, comprising: transmitting downlink control information (DCI) in a downlink bandwidth part (BWP), wherein the DCI schedules uplink transmission in an uplink bandwidth part (BWP); and receiving the uplink transmission on at least one of a first plurality of resource block (RB) sets based on the DCI, wherein each of the first plurality of RB sets includes a plurality of adjacent RBs in the uplink BWP, and a guard band is configured between two adjacent RB sets in the first plurality of RB sets; and wherein the at least one RB set in the first plurality of RB sets comprises one or more of the following: an RB set having an RB set index equal to a first RB set index, the DCI being received in the RB set having the first RB set index in the downlink BWP; An RB set having a lowest RB set index or a lowest central frequency point among the first plurality of RB sets; or An RB set having a central frequency point equal to the lowest central frequency point of a second plurality of RB sets, and the search space of the DCI includes the second plurality of RB sets. The method of claim 14 , wherein the DCI is DCI format 0_0. 16 . The method of claim 14 , wherein the number of RB sets in the first plurality of RB sets is a maximum integer less than or equal to a result of dividing a bandwidth of the uplink BWP by a bandwidth of a subband.

17. The method of claim 14, wherein the DCI includes a frequency hopping flag having at least one bit, and the frequency hopping flag indicates the at least one RB set used for the uplink transmission.

18. The method of claim 17, wherein the frequency hopping flag indicates one of two predefined RB sets in the first plurality of RB sets.

19. The method of claim 17, wherein the frequency hopping flag indicates a number of RB sets from two predefined RB sets of the first plurality of RB sets. 20 . The method according to claim 18 , wherein the two predefined RB sets are two RB sets having two lowest indices or two lowest central frequency points in the first plurality of RB sets.

21. The method of claim 17, wherein the frequency hopping flag indicates that the at least one RB set comprises an RB set having an odd RB set index or an even RB set index among the first plurality of RB sets.

22. The method of claim 18 or 19, wherein one of the two predefined RB sets has an RB set index equal to the first RB set index, and the other of the two predefined RB sets has an RB set index equal to the first RB set index minus 1 or the first RB set index plus 1.

23. The method according to claim 18 or 19, wherein the DCI is transmitted in a concentrated manner in RBs having a first central frequency point in the downlink BWP; and One of the two predefined RB sets has a central frequency point equal to the first central frequency point and has a second RB set index, and the other of the two predefined RB sets has an RB set index equal to the second RB set index minus 1 or the second RB set index plus 1. 24 . The method according to claim 14 , wherein the DCI is transmitted in an RB set having a first central frequency point in the downlink BWP, and the at least one RB set includes an RB set having a central frequency point equal to the first central frequency point. 25 . The method of claim 14 , wherein the at least one RB set comprises an RB set having a highest RB set index or a highest central frequency point among the first plurality of RB sets.

26. The method of claim 14, wherein the search space of the DCI comprises a second plurality of RB sets, and an RB set having a lowest central frequency point in the second plurality of RB sets has a third RB set index; and The at least one RB set includes an RB set having an RB set index equal to the third RB set index.

27. A device for wireless communication, comprising: at least one non-transitory computer-readable medium having computer-executable instructions stored thereon; at least one receiving circuit system; at least one transmit circuit system; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receive circuitry, and the at least one transmit circuitry, Wherein the computer-executable instructions cause the at least one processor to implement the method of any one of claims 1 to 13.

28. A device for wireless communication, comprising: at least one non-transitory computer-readable medium having computer-executable instructions stored thereon; at least one receiving circuit system; at least one transmit circuit system; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receive circuitry, and the at least one transmit circuitry, Wherein the computer-executable instructions cause the at least one processor to implement the method of any one of claims 14 to 26.

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