Method and equipment for frequency domain resource indication in multi-cell scheduling scene

Abstract

The embodiment of the invention relates to a method and equipment for indicating frequency domain resources in a multi-cell scheduling scene. In accordance with some embodiments of the present disclosure, a UE may: receive, from a BS, a DCI format scheduling a first group of cells among a second group of cells configured for the UE by the BS, where the DCI format includes a first field indicating whether one or more cells are scheduled by the DCI format and a second field indicating a frequency domain resource assignment; determining an assigned RB on the first group of cells based on the first and second fields; and receiving a downlink transmission from the BS on the assigned RB in a case where the DCI format schedules a downlink transmission, or transmitting an uplink transmission to the BS on the assigned RB in a case where the DCI format schedules an uplink transmission.

Description

Technical Field

[0001] Embodiments of the present disclosure generally relate to wireless communication techniques, and more particularly to frequency domain resource indication in a multi-cell scheduling scenario. Background Art

[0002] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcast, etc. 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 (e.g., 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).

[0003] In a wireless communication system, a base station (BS) and a user equipment (UE) may communicate via a downlink (DL) channel and an uplink (UL) channel. For example, a UE may monitor a physical downlink control channel (PDCCH) in one or more search spaces. The PDCCH may carry downlink control information (DCI), which may schedule an uplink channel (e.g., a physical uplink shared channel (PUSCH)) or a downlink channel (e.g., a physical downlink shared channel (PDSCH)).

[0004] Carrier aggregation (CA) technology can be used in wireless communication systems to, for example, increase data rates. For example, CA technology may refer to aggregating spectrum resources (e.g., carriers or cells) from the same frequency band or different frequency bands. In a CA scenario, multiple cells may be configured for a UE, and DL or UL channels may be carried on one or more of the multiple cells.

[0005] There is a need to handle frequency domain resource assignment for uplink and downlink transmissions scheduled by DCI in CA scenarios. Summary of the invention

[0006] 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: receive a DCI format from a BS that schedules a first group of cells among a second group of cells configured by the BS for the UE, wherein the DCI format includes a first field indicating whether one or more cells are scheduled by the DCI format and a second field for indicating frequency domain resource assignment; determine resource blocks (RBs) assigned on the first group of cells based on the first and second fields; and, if the DCI format schedules downlink transmission, receive the downlink transmission from the BS on the assigned RB, or if the DCI format schedules uplink transmission, transmit the uplink transmission to the BS on the assigned RB.

[0007] In some embodiments of the present disclosure, the size of the first field is equal to one bit. In some embodiments of the present disclosure, the first field indicates the first group of cells, and the size of the first field depends on the number of cells in the second group of cells.

[0008] In some embodiments of the present disclosure, the second field indicates a set of interlaces on a bandwidth of a virtual cell, the virtual cell being formed by aggregating all cells in the second set of cells according to a predefined order.

[0009] In some embodiments of the present disclosure, the size of the second field depends on the total number of interlaces over the bandwidth of the virtual cell.

[0010] In some embodiments of the present disclosure, the second field includes a plurality of RB group (RBG) based indicators, each of the plurality of RBG based indicators corresponding to a cell in the second set of cells and indicating an assigned RBG on the corresponding cell.

[0011] In some embodiments of the present disclosure, the size of each RBG-based indicator of the multiple RBG-based indicators depends on the resource allocation type of the corresponding cell, the RBG granularity of the corresponding cell, and one of: the associated carrier bandwidth of the corresponding cell, the maximum bandwidth among the bandwidth part (BWP) of the corresponding cell, and the bandwidth of the currently active BWP of the corresponding cell.

[0012] In some embodiments of the present disclosure, the plurality of RBG-based indicators in the second field are arranged according to a predefined order.

[0013] In some embodiments of the present disclosure, the number of downlink transmissions or uplink transmissions is equal to the number of cells in the first group of cells.

[0014] 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: receive a DCI format from a BS that schedules a first group of cells among a second group of cells configured by the BS for the UE, wherein the DCI format includes at least one frequency domain resource assignment (FDRA) field; determine the first group of cells based on the at least one FDRA field; determine the RBs assigned on the first group of cells based on the at least one FDRA field; and, if the DCI format schedules downlink transmission, receive the downlink transmission from the BS on the assigned RB, or if the DCI format schedules uplink transmission, transmit the uplink transmission to the BS on the assigned RB.

[0015] In some embodiments of the present disclosure, each of the at least one FDRA field corresponds to a cell in the second set of cells and indicates an assigned RB on the corresponding cell.

[0016] In some embodiments of the present disclosure, the size of each FDRA field in the at least one FDRA field depends on the resource allocation type of the corresponding cell, the RBG granularity of the corresponding cell and one of the following: the associated carrier bandwidth of the corresponding cell, the maximum bandwidth among the bandwidth part (BWP) of the corresponding cell, or the bandwidth of the currently active BWP of the corresponding cell.

[0017] In some embodiments of the present disclosure, the RBG granularity of each cell in the second group of cells is independently configured by the BS. In some embodiments of the present disclosure, the resource allocation type of each cell in the second group of cells is independently configured by the BS. In some embodiments of the present disclosure, the RBG granularity of different resource allocation types of each cell in the second group of cells is independently configured by the BS.

[0018] In some embodiments of the present disclosure, the configured RBG granularity of the cells in the second group of cells depends on one of: the associated carrier bandwidth of the cells, the maximum bandwidth among the bandwidth parts (BWPs) of the cells, or the bandwidth of the currently active BWP of the cells.

[0019] In some embodiments of the present disclosure, all cells in the second group of cells have the same resource allocation type. In some embodiments of the present disclosure, all cells in the second group of cells have the same RBG granularity, which depends on the total bandwidth of the second group of cells.

[0020] In some embodiments of the present disclosure, the at least one FDRA field includes a single FDRA field indicating an assigned RB group (RBG) on a virtual cell formed by aggregating all cells in the second group of cells according to a predefined order.

[0021] In some embodiments of the present disclosure, the size of the single FDRA field depends on the total bandwidth of the second group of cells and the RBG granularity of the second group of cells.

[0022] In some embodiments of the present disclosure, the number of downlink transmissions or uplink transmissions is equal to the number of cells in the first group of cells.

[0023] Some embodiments of the present disclosure provide a BS. The BS may include a transceiver and a processor coupled to the transceiver. The processor may be configured to: configure a second group of cells for a UE; transmit a DCI format for scheduling RBs on a first group of cells among the second group of cells to the UE, wherein the DCI format includes a first field indicating whether one or more cells are scheduled by the DCI format and a second field for indicating frequency domain resource assignment, and the scheduled RBs are indicated by the first and second fields; and in the case where the DCI format schedules downlink transmission, transmit the downlink transmission to the UE on the scheduled RBs, or in the case where the DCI format schedules uplink transmission, receive the uplink transmission from the UE on the scheduled RBs.

[0024] In some embodiments of the present disclosure, the size of the first field is equal to one bit. In some embodiments of the present disclosure, the first field indicates the first group of cells, and the size of the first field depends on the number of cells in the second group of cells.

[0025] In some embodiments of the present disclosure, the second field indicates a set of interlaces on a bandwidth of a virtual cell, the virtual cell being formed by aggregating all cells in the second set of cells according to a predefined order.

[0026] In some embodiments of the present disclosure, the scheduled RBs are RBs within an intersection of the first group of cells and the group of interlaces.

[0027] In some embodiments of the present disclosure, the interleaving is RB-based interleaving, and the total number of RB-based interleavings on the bandwidth of the virtual cell: depends on the SCS of the second group of cells; is configured by the BS; or depends on the number of RBs between two consecutive RBs of a single interleaving on the bandwidth of the virtual cell.

[0028] In some embodiments of the present disclosure, the interleaving is RBG-based interleaving, and the total number of RBG-based interleavings on the bandwidth of the virtual cell and the RBG size associated with the RBG-based interleavings are configured by the BS.

[0029] In some embodiments of the present disclosure, the size of the second field depends on the total number of interlaces over the bandwidth of the virtual cell.

[0030] In some embodiments of the present disclosure, the second field includes a plurality of RBG-based indicators, each of the plurality of RBG-based indicators corresponding to a cell in the second set of cells and indicating a scheduled RBG on the corresponding cell.

[0031] In some embodiments of the present disclosure, the size of each RBG-based indicator among the multiple RBG-based indicators depends on the resource allocation type of the corresponding cell, the RBG granularity of the corresponding cell and one of the following: the associated carrier bandwidth of the corresponding cell, the maximum bandwidth among the BWP of the corresponding cell and the bandwidth of the currently active BWP of the corresponding cell.

[0032] In some embodiments of the present disclosure, the processor is further configured to determine, according to the number of cells in the first group of cells, an RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells.

[0033] In some embodiments of the present disclosure, when the number of cells in the first group of cells is greater than a threshold, the RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells is the RBG granularity of the corresponding cell in the first group of cells. In some embodiments of the present disclosure, when the number of cells in the first group of cells is less than or equal to the threshold, the RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells is less than or equal to the RBG granularity of the corresponding cell in the first group of cells.

[0034] In some embodiments of the present disclosure, the plurality of RBG-based indicators in the second field are arranged according to a predefined order.

[0035] In some embodiments of the present disclosure, the number of downlink transmissions or uplink transmissions is equal to the number of cells in the first group of cells.

[0036] Some embodiments of the present disclosure provide a BS. The BS may include a transceiver and a processor coupled to the transceiver. The processor may be configured to: configure a second group of cells for a UE; transmit a DCI format for scheduling RBs on a first group of cells among the second group of cells to the UE, wherein the DCI format includes at least one FDRA field, and the first group of cells and the scheduled RBs are indicated by the at least one FDRA field; and if the DCI format schedules downlink transmission, transmit the downlink transmission to the UE on the scheduled RB, or if the DCI format schedules uplink transmission, receive the uplink transmission from the UE on the scheduled RB.

[0037] In some embodiments of the present disclosure, each of the at least one FDRA field corresponds to a cell in the second set of cells and indicates a scheduled RB on the corresponding cell.

[0038] In some embodiments of the present disclosure, the size of each FDRA field in the at least one FDRA field depends on the resource allocation type of the corresponding cell, the RBG granularity of the corresponding cell and one of the following: the associated carrier bandwidth of the corresponding cell, the maximum bandwidth among the BWP of the corresponding cell, or the bandwidth of the currently active BWP of the corresponding cell.

[0039] In some embodiments of the present disclosure, the processor is further configured to, for each cell in the second group of cells: when the corresponding cell is not scheduled by the DCI format, set the corresponding FDRA field in the at least one FDRA field to indicate an inapplicable value; or when the corresponding cell is scheduled by the DCI format, set the corresponding FDRA field in the at least one FDRA field to indicate an applicable value.

[0040] In some embodiments of the present disclosure, the processor is further configured to perform at least one of the following: independently configuring the RBG granularity of each cell in the second group of cells; independently configuring the resource allocation type of each cell in the second group of cells; or independently configuring the RBG granularity of different resource allocation types for each cell in the second group of cells.

[0041] In some embodiments of the present disclosure, the configured RBG granularity of the cells in the second group of cells depends on one of: an associated carrier bandwidth of the cells, a maximum bandwidth among the BWPs of the cells, or a bandwidth of a currently active BWP of the cells.

[0042] In some embodiments of the present disclosure, all cells in the second group of cells have the same resource allocation type. In some embodiments of the present disclosure, all cells in the second group of cells have the same RBG granularity, which depends on the total bandwidth of the second group of cells.

[0043] In some embodiments of the present disclosure, the at least one FDRA field includes a single FDRA field indicating a scheduled RBG on a virtual cell formed by aggregating all cells in the second group of cells according to a predefined order.

[0044] In some embodiments of the present disclosure, the size of the single FDRA field depends on the total bandwidth of the second group of cells and the RBG granularity of the second group of cells.

[0045] In some embodiments of the present disclosure, the processor is further configured to: for each cell in the second group of cells, when the corresponding cell is not scheduled by the DCI format, set the single FDRA field to indicate that there is no complete or partial RBG on the corresponding cell; or when the corresponding cell is scheduled by the DCI format, set the single FDRA field to indicate that there is at least one complete RBG or at least one partial RBG on the corresponding cell.

[0046] In some embodiments of the present disclosure, the number of downlink transmissions or uplink transmissions is equal to the number of cells in the first group of cells.

[0047] Some embodiments of the present disclosure provide a method performed by a UE. The method may include: receiving a DCI format from a BS that schedules a first group of cells among a second group of cells configured by the BS for the UE, wherein the DCI format includes a first field indicating whether one or more cells are scheduled by the DCI format and a second field for indicating frequency domain resource assignment; determining RBs assigned on the first group of cells based on the first and second fields; and receiving the downlink transmission from the BS on the assigned RB if the DCI format schedules the downlink transmission, or transmitting the uplink transmission to the BS on the assigned RB if the DCI format schedules the uplink transmission.

[0048] Some embodiments of the present disclosure provide a method performed by a UE. The method may include: receiving a DCI format from a BS that schedules a first group of cells among a second group of cells configured by the BS for the UE, wherein the DCI format includes at least one FDRA field; determining the first group of cells based on the at least one FDRA field; determining RBs assigned on the first group of cells based on the at least one FDRA field; and receiving the downlink transmission from the BS on the assigned RB if the DCI format schedules a downlink transmission, or transmitting the uplink transmission to the BS on the assigned RB if the DCI format schedules an uplink transmission.

[0049] Some embodiments of the present disclosure provide a method performed by a BS. The method may include: configuring a second group of cells for a UE; transmitting a DCI format for scheduling RBs on a first group of cells among the second group of cells to the UE, wherein the DCI format includes a first field indicating whether one or more cells are scheduled by the DCI format and a second field for indicating frequency domain resource assignment, and the scheduled RBs are indicated by the first and second fields; and in the case where the DCI format schedules downlink transmission, transmitting the downlink transmission to the UE on the scheduled RBs, or in the case where the DCI format schedules uplink transmission, receiving the uplink transmission from the UE on the scheduled RBs.

[0050] Some embodiments of the present disclosure provide a method performed by a BS. The method may include: configuring a second group of cells for a UE; transmitting a DCI format for scheduling RBs on a first group of cells among the second group of cells to the UE, wherein the DCI format includes at least one FDRA field, and the first group of cells and the scheduled RBs are indicated by the at least one FDRA field; and transmitting the downlink transmission to the UE on the scheduled RBs if the DCI format schedules downlink transmission, or receiving the uplink transmission from the UE on the scheduled RBs if the DCI format schedules uplink transmission.

[0051] Some embodiments of the present disclosure provide a device. According to some embodiments of the present disclosure, the device 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 cause the device to perform the method according to some embodiments of the present disclosure together with the at least one processor. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] 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, which are illustrated in the accompanying drawings. These drawings depict only exemplary embodiments of the present disclosure and therefore should not be considered as limiting the scope thereof.

[0053] Figure 1 A schematic diagram illustrating a wireless communication system according to some embodiments of the present disclosure;

[0054] Figure 2 and 3 A schematic diagram illustrating a DCI format for scheduling multiple transmissions according to some embodiments of the present disclosure;

[0055] Figure 4 Describing an exemplary virtual cell according to some embodiments of the present disclosure;

[0056] Figure 5 An example of an RB-based interleaving structure according to some embodiments of the present disclosure is described;

[0057] Figure 6 An example of an RBG-based interleaving structure according to some embodiments of the present disclosure is described;

[0058] Figures 7 to 10 A flowchart illustrating an example process of wireless communication according to some embodiments of the present disclosure; and

[0059] Fig.11 A block diagram illustrating an example device according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0060] 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, and it is hoped that the different embodiments are included in the spirit and scope of the present disclosure.

[0061] 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 (several) specific network architectures and new service scenarios (e.g., 3rd Generation Partnership Project (3GPP) 5G (NR), 3GPP Long Term Evolution (LTE) Release 8, etc.). It is considered that with the development of network architectures and new service scenarios, all embodiments in the present disclosure are also applicable to similar technical problems; and in addition, the terms described in the present disclosure may be changed, which should not affect the principles of the present disclosure.

[0062] Figure 1 A schematic diagram illustrating a wireless communication system 100 according to some embodiments of the present disclosure.

[0063] like Figure 1 As shown in FIG. 1 , wireless communication system 100 may include some UEs 101 (e.g., UE 101a and UE 101b) and base stations (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 and BSs may be included in wireless communication system 100 .

[0064] (Several) 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 security camera), a car computer, a network device (e.g., a router, a switch and a modem), or the like. According to some embodiments of the present disclosure, (several) 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, (several) UE 101 includes a wearable device, such as a smart watch, a fitness bracelet, an optical head-mounted display, or the like. In addition, (several) 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 subscriber station, a user terminal or a device, or described using other terms used in the art. UE(s) 101 may communicate with BS 102 via uplink (UL) communication signals.

[0065] BS 102 may be distributed in a geographic area. In certain embodiments of the present disclosure, 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 terms used in the art. BS 102 is typically part of a radio access network, which may include one or more controllers communicatively coupled to one or more corresponding BS 102. BS 102 may communicate with (several) UEs 101 via downlink (DL) communication signals.

[0066] 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 a wireless communication network, a cellular telephone network, a network based on time division multiple access (TDMA), a network based on code division multiple access (CDMA), a network based on orthogonal frequency division multiple access (OFDMA), an LTE network, a network based on 3GPP, a 3GPP5G network, a satellite communication network, a high altitude platform network, and / or other communication networks.

[0067] In some embodiments of the present disclosure, the wireless communication system 100 is compatible with 5G NR of the 3GPP protocol. For example, the BS 102 may transmit data using an orthogonal frequency division multiple access (OFDM) modulation scheme on the DL, and (several) UEs 101 may transmit data using a discrete Fourier transform-spread spectrum-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 protocols, such as WiMAX and other protocols.

[0068] In some embodiments of the present disclosure, BS 102 and (several) UE 101 may communicate using other communication protocols, such as the IEEE 802.11 series of wireless communication protocols. In addition, in some embodiments of the present disclosure, BS 102 and (several) UE 101 may communicate via a licensed spectrum, while in some other embodiments, BS 102 and (several) UE 101 may communicate via an unlicensed spectrum. The present disclosure is not intended to be limited to implementations of any particular wireless communication system architecture or protocol.

[0069] Communication technologies (e.g., NR) may support a variety of spectrums in different frequency ranges. For example, in advanced 5G markets, it is expected that the availability of spectrum will increase, which may be attributed to the re-division of frequency bands originally used for previous generation cellular networks. For example, for some low-frequency bands in frequency range 1 (FR1) (e.g., 410 MHz to 7125 MHz), the available spectrum bands tend to be more fragmented and dispersed, with narrower bandwidths. In addition, for frequency bands in frequency range 2 (FR2) (e.g., 24250 MHz to 52600 MHz) and some frequency bands in FR1, the available spectrum may be wider, making intra-band multi-carrier operation necessary.

[0070] In order to meet different spectrum demands, it is important to ensure that these fragmented or scattered spectrum bands or spectrum with wider bandwidth is utilized in a more spectrally and power efficient and flexible manner, thereby providing higher throughput and better coverage in the network.

[0071] For example, one motivation is to improve spectrum / power efficiency and flexibility in scheduling data within multiple cells (including intra-band cells and inter-band cells). In some instances, the scheduling mechanism may only allow scheduling of a single PUSCH or PDSCH on a single cell according to the scheduling DCI. As more dispersed spectrum bands or spectrum with wider bandwidth become available, it is recommended to allow scheduling of multiple cells simultaneously.

[0072] A communication system (e.g., NR) may be designed to support up to 16 component carriers (CCs) in the case of carrier aggregation (CA) or up to 32 CCs in the case of dual connectivity (DC). In some embodiments of the present application, in the case of CA, one DCI format may schedule up to one cell (e.g., carrier) through cross-cell (or cross-carrier) scheduling or self-scheduling. When the number of cells configured for a UE is large, this requires a large amount of signaling overhead of the PDCCH to schedule DL transmissions (e.g., PDSCH) or UL transmissions (e.g., PUSCH). In order to reduce the signaling overhead, it would be beneficial to use a single DCI format to schedule multiple PDSCHs or PUSCHs on multiple cells configured for the UE, which is referred to as multi-cell scheduling in the context of the present disclosure. At the same time, the trade-off between signaling overhead reduction and scheduling restrictions must be considered.

[0073] Figure 2 A diagram illustrating a DCI format for scheduling multiple transmissions according to some embodiments of the present disclosure.

[0074] In some embodiments of the present disclosure, multiple CCs (for example, including but not limited to Figure 2CCs 231 to 234 in the UE). It should be understood that the subcarrier spacing (SCS) of the cells configured for the UE may be the same or different. Each of the multiple CCs may correspond to a corresponding cell (e.g., a serving cell) or carrier of the UE. Each cell (serving cell) may be associated with a (serving) cell index.

[0075] In some embodiments of the present disclosure, the BS may transmit a single DCI format to schedule multiple transmissions on multiple cells, rather than using separate DCI formats to schedule multiple transmissions on multiple cells respectively. Figure 2 , DCI format 211 may schedule transmissions 221 - 224 on CCs 231 - 234, with each CC carrying a single transmission.

[0076] In some examples, transmissions 221-224 may be uplink transmissions, for example, uplink physical data channels such as PUSCH. In some examples, transmissions 221-224 may be downlink transmissions, for example, downlink physical data channels such as PDSCH.

[0077] exist Figure 2 In the example, the cell on which the DCI format 211 is detected (i.e., CC 231) carries one of the scheduled transmissions (e.g., transmission 221). This may be referred to as self-scheduling. Other transmissions in the scheduled transmissions (e.g., transmissions 222 to 224) are scheduled on a cell different from the cell on which the DCI format 211 is detected (i.e., CC 231). This may be referred to as cross-cell (or cross-carrier) scheduling.

[0078] Despite Figure 2 In the embodiment, the DCI format 211 schedules multiple transmissions via both self-scheduling and cross-cell scheduling, but it should be understood that the DCI format may schedule multiple transmissions via only cross-cell scheduling. Figure 3 This example is shown. It should also be understood that in some other embodiments of the present disclosure, a cell (eg, CC) scheduled by a DCI format may carry more than one transmission (eg, PDSCH or PUSCH).

[0079] Figure 3 A diagram illustrating a DCI format for scheduling multiple transmissions according to some embodiments of the present disclosure.

[0080] In some embodiments of the present disclosure, multiple CCs (for example, including but not limited to Figure 3 331 to 335 in the UE). It should be understood that the subcarrier spacing (SCS) of the cells configured for the UE may be the same or different. Each of the multiple CCs may correspond to a corresponding cell (e.g., a serving cell) or carrier of the UE. Each cell (serving cell) may be associated with a (serving) cell index.

[0081] like Figure 3 , DCI format 311 may be transmitted on CC 331 and schedule transmissions 321-324 on CCs 332-335, with each CC carrying a single transmission. In some examples, transmissions 321-324 may be uplink transmissions, for example, uplink physical data channels such as PUSCH. In some examples, transmissions 321-324 may be downlink transmissions, for example, downlink physical data channels such as PDSCH.

[0082] When a DCI format schedules a single transmission on a single cell, the DCI format may indicate the frequency domain resources assigned for the scheduled transmission on the scheduled cell. This may not be applicable when a single DCI format schedules multiple transmissions on multiple cells (e.g., multiple PDSCHs or PUSCHs). For example, since different cells may have different bandwidths, a single frequency domain resource assignment (FDRA) in a single DCI format may not be applicable to multiple scheduled cells because this will cause more scheduling restrictions. In some embodiments of the present disclosure, a separate FDRA field may be used for each of the scheduled cells in the DCI format. However, this will result in huge signaling overhead for scheduling DCI. Embodiments of the present application propose an improved solution for indicating frequency domain resources of scheduled cells, which can reduce overhead.

[0083] On the other hand, before detecting the DCI format, the UE needs to know the exact payload size of the DCI format. Since the number of cells scheduled by the DCI format can be changed dynamically, this will affect the DCI payload size. Therefore, how to determine the payload size of the DCI format should also be solved.

[0084] More details about the embodiments of the present disclosure will be described below in conjunction with the accompanying drawings.It should be noted that the solution of the present disclosure can be applied to both downlink transmission (eg, PDSCH) and uplink transmission (eg, PUSCH) scheduled by a DCI format.

[0085] In some embodiments of the present disclosure, the BS may configure a set of cells (denoted as cell set #1) that may be used for multi-cell scheduling of the UE. For example, the BS may transmit DCI to the UE, and the DCI may schedule one or more downlink transmissions (e.g., PDSCH) or uplink transmissions (e.g., PUSCH) on one or more cells in cell set #1.

[0086] In some embodiments of the present disclosure, when a single DCI format can schedule multiple cells for downlink or uplink transmission, the scheduled or assigned frequency domain resources (e.g., RBs) on the scheduled cells may be indicated by two fields (represented as field #A1 and field #A2).

[0087] For example, the DCI format may schedule a group of cells (denoted as cell set #2) among cell set #1. Field #A1 of the DCI format may indicate whether one or more cells are scheduled by the DCI format. For example, field #A1 indicates cell set #2 among cell set #1. The size of field #A1 may depend on the number of cells in cell set #1. For example, assuming that cell set #1 includes N cells, field #A1 may be an N-bit bitmap, where each bit in the bitmap corresponds to a cell in cell set #1. For example, a bit value of "0" indicates that the corresponding cell is not scheduled, while a bit value of "1" indicates that the corresponding cell is scheduled; or vice versa. In some instances, a UE may be configured with up to 4 cells for multi-cell scheduling (e.g., N≤4).

[0088] Field #A2 of the DCI format may indicate a frequency domain resource assignment for a virtual cell. For example, field #A2 may indicate an assigned RB for a virtual cell. Various methods may be used to form a virtual cell. For example, a virtual cell may be formed by aggregating all cells in cell set #1 according to a predefined order.

[0089] For example, the cells in cell set #1 may be aggregated according to a predefined order (e.g., ascending or descending order) of their cell indexes or carrier frequencies. The RBs of the virtual cell may be indexed continuously from the lowest RB of the first cell in the aggregated cells (i.e., the start RB of the virtual cell) to the highest RB of the last cell in the aggregated cells (i.e., the end RB of the virtual cell). Alternatively, the RBs of the virtual cell may be indexed continuously from the highest RB of the last cell in the aggregated cells (i.e., the start RB of the virtual cell) to the lowest RB of the last cell in the aggregated cells (i.e., the end RB of the virtual cell).

[0090] For example, assume that the UE is configured with a set of cells (i.e., cell set #1) for multi-cell scheduling via a single DCI format (including CC 1, CC 2, ..., and CC N, CC 1 includes k1 RBs, CC 2 includes k2 RBs, CC 3 includes k3 RBs, ..., and CC N includes k N RBs, thus Y = k1 + k2 + k3 + ... + k N ), then these Y RBs may be numbered consecutively as RB0, RB1, ..., RB from the lowest RB of the first RB in the aggregated cell to the highest RB of the last cell in the aggregated cell. y-1 .

[0091] For example, Figure 4An exemplary virtual cell 430 according to some embodiments of the present disclosure is shown. Assume that the UE is configured with CCs 431 to 434 for multi-cell scheduling, and the values ​​of the serving cell indexes of CCs 431 to 434 have the following relationship: CC431 <CC 432<CC 433<CC 434。

[0092] In some examples, CCs 431 to 434 may be arranged according to the ascending order of their cell indexes and then combined into a virtual cell 430, such as Figure 4 RB 411 represents the lowest RB of the lowest cell (eg, CC 431) in virtual cell 430, and RB 412 represents the highest RB of the highest cell (eg, CC 434) in virtual cell 430.

[0093] In some examples, the RBs on cell 430 may be from RB 411 (RB0) to RB 412 (RB y-1 ) are numbered consecutively as RB0, RB1, ..., RB y-1 , where y represents the total number of RBs on CCs 431 to 434. That is, RB 411 and RB 412 may be used as the start RB and the end RB for numbering RBs of virtual cell 430. In other examples, RB 411 and RB 412 may be used as the end RB and the start RB for numbering RBs of virtual cell 430.

[0094] In some embodiments, an interleaving-based structure may be used for a virtual cell. An interleaving may be defined as a set of frequency resources (e.g., RBs or RBGs) that are equally spaced in a frequency domain (e.g., the frequency domain of a virtual cell). For example, an interleaving may be defined with reference to a starting RB of a virtual cell (e.g., an RB with a minimum index, such as RB0).

[0095] For example, a virtual cell may contain multiple interlaces (denoted as interlace set #1). Field #A2 in the DCI format may indicate a set of interlaces (denoted as interlace set #2) from interlace set #1. That is, field #A2 may indicate interlace set #2 over the bandwidth of the virtual cell. The RBs actually scheduled by the DCI format are the RBs in the intersection of cell set #2 and interlace set #2.

[0096] In some embodiments, an RB-based interleaving structure may be used. For example, the RB-based interleaving structure may be represented as {RB p, p+M1, p+2*M1, ...} within a virtual cell, where p represents an interleaving index and p∈{0, 1, 2, ..., M1-1}, and M1 represents the total number of RB-based interleaving within the virtual cell. When determining the total number of RB-based interleaving over the bandwidth of the virtual cell, the RB-based interleaving structure of the virtual cell is determined.

[0097] Figure 5 An example of an RB-based interleaving structure according to some embodiments of the present disclosure is described. It should be understood that Figure 5 The structures in FIG. 5 are for illustrative purposes only and should not be construed as limiting the embodiments of the present disclosure.

[0098] exist Figure 5 In the example, the bandwidth of the virtual cell may be divided into RBs, which may be indexed according to various methods as mentioned above. For illustrative purposes, Figure 5 Only a portion of the RBs included in the bandwidth of the virtual cell are shown (e.g. Figure 5 Based on the carrier bandwidth of cell set #1, a person skilled in the art can easily know the number of RBs included in the bandwidth of the virtual cell.

[0099] Assume that the total number of RB-based interleaving within a virtual cell is 10 (e.g., Figure 5 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 bandwidth of the virtual cell. Figure 5 As shown in , interlace 0 may include RB 0, RB 10, RB 20, RB 30, and so on; interlace 1 may include RB 1, RB 11, RB 21, RB 31, and so on; and interlace 9 may include RB 9, RB 19, RB 29, RB 39, and so on.

[0100] Various methods may be used to determine the total number of RB-based interlaces over the bandwidth of the virtual cell.

[0101] For example, the total number of RB-based interleaving within a virtual cell may depend on the SCS of cell set #1. For example, the cells in cell set #1 may have the same SCS. For a 15kHz SCS, the total number of RB-based interleaving within a virtual cell is 10 (e.g., M1=10); and for a 30kHz SCS, the total number of RB-based interleaving within a virtual cell is 5 (e.g., M1=5). In some embodiments, when the SCS configuration is higher than 30kHz, other methods may be used to determine the total number of RB-based interleaving within a virtual cell.

[0102] For example, the total number of RB-based interlaces within the virtual cell may be configured by the BS.For example, the BS may configure the UE with the total number of RB-based interlaces (eg, the value of M1) via radio resource control (RRC) signaling, which applies to the entire cell set #1.

[0103] For example, the total number of RB-based interlaces within a virtual cell may depend on the number of RBs between two consecutive RBs of a single interlace over the bandwidth of the virtual cell. For example, the BS may use the number of RBs between two consecutive RBs of one RB-based interlace (denoted as M) via RRC signaling. RB ) configures the UE. The UE may determine the total number of RB-based interleaving within the virtual cell based on the configured information. For example, the value of M1 is equal to M RB or M RB +1 for the value.

[0104] In some embodiments, an RBG-based interleaving structure may be adopted. For example, the RBG-based interleaving structure may be represented as {RB p*K+j, p*K+j+K*M2, p*K+j+2*K*M2, ...} within a virtual cell, where p represents an interleaving index and p∈{0,1,2, ...,M2-1}, j represents an RB index within each RBG and j∈{0,1,2, ...,K-1}, K represents an RBG size (i.e., the number of consecutive RBs within each RBG), and M2 represents the total number of RBG-based interleaving within the virtual cell. The RB-based interleaving structure may be viewed as a special case of an RBG-based interleaving structure, where the RBG size is 1.

[0105] To determine the RBG-based interleaving structure, both the number of RBG-based interleavings and the RBG size are needed. In some examples, the two values ​​may be configured via RRC signaling and apply to the entire cell set #1.

[0106] Figure 6 An example of an RBG-based interleaving structure according to some embodiments of the present disclosure is described. It should be understood that Figure 6 The structures in FIG. 5 are for illustrative purposes only and should not be construed as limiting the embodiments of the present disclosure.

[0107] exist Figure 6 In the example, the bandwidth of the virtual cell may be divided into RBs, which may be indexed according to various methods as mentioned above. For illustrative purposes, Figure 6 Only a portion of the RBs included in the bandwidth of the virtual cell are shown (e.g. Figure 6 Based on the carrier bandwidth of cell set #1, a person skilled in the art can easily know the number of RBs included in the bandwidth of the virtual cell.

[0108] Assume that the total number of RBG-based interleaving within a virtual cell is 10 (e.g., Figure 6The 10 interlaces are indexed from interlace 0 to interlace 9) and the RBG size is 2. Each of the 10 interlaces may include RBGs that are evenly spaced in the frequency domain, where each RBG includes 2 consecutive RBs. The number of RBs included in each of the 10 interlaces may depend on the bandwidth of the virtual cell. Figure 6 As shown in , interlace 0 may include {RB 0, RB 1}, {RB 20, RB 21}, etc.; interlace 1 may include {RB 2, RB 3}, {RB 22, RB 23}, etc.; and interlace 9 may include {RB 18, RB 19}, {RB 38, RB 39}, etc.

[0109] The size of field #A2 may depend on the total number of interlaces over the bandwidth of the virtual cell, denoted as M. For example, the value of M may be implemented as M1 or M2 as discussed above.

[0110] For example, field #A2 may be an M-bit bitmap, where each bit corresponds to one of the M interlaces over the bandwidth of the virtual cell. For example, field #A2 may be a resource indication value (RIV) corresponding to the starting interlace index of the scheduled interlace and the number of consecutive scheduled interlaces. For example, field #A2 may include Units digit.

[0111] From the perspective of the UE, the RB scheduled by the DCI format in the frequency domain is the intersection of the cell scheduled by the DCI format indicated by field #A1 and the interlace scheduled by the DCI format indicated by field #A2. The number of UL transmissions or DL ​​transmissions scheduled by the DCI format (e.g., the number of PDSCHs or PUSCHs) may be equal to the number of scheduled cells.

[0112] From the perspective of the UE, based on the associated carrier bandwidth of the cells within cell set #1, the UE can determine the total number of RBs of a virtual cell, which is formed by aggregating all cells in cell set #1. The UE can determine the size of field #A1 based on the number of cells in cell set #1 and the size of field #A2 based on the interleaving structure. Therefore, the UE can determine the payload size of a DCI format that can schedule multiple cells. The UE can blindly detect the DCI format based on the payload size. Upon receiving the DCI format, the UE can first determine the scheduled cell based on field #A1 and determine the scheduled interleaving based on field #A2. Then, the UE can identify the assigned RBs within the intersection of the scheduled cell and the scheduled interleaving.

[0113] In some embodiments of the present disclosure, when a single DCI format can schedule multiple cells for downlink or uplink transmission, the scheduled or assigned frequency domain resources (e.g., RBs) on the scheduled cells may be indicated by two fields (represented as field #B1 and field #B2).

[0114] For example, the DCI format may schedule a group of cells (e.g., cell set #2) among cell set #1. Field #B1 of the DCI format may indicate whether one or more cells are scheduled by the DCI format. In some embodiments, field #B1 may indicate whether one cell or multiple cells are scheduled by the DCI format. The size of field #B1 may be equal to one bit. For example, a bit value of "0" indicates that only a single cell is scheduled, while a bit value of "1" indicates that two or more cells are scheduled; or vice versa. In some embodiments, field #B1 indicates cell set #2 among cell set #1. The size of field #B1 may depend on the number of cells in cell set #1. For example, assuming that cell set #1 includes N cells, field #B1 may be an N-bit bitmap, where each bit in the bitmap corresponds to a cell in cell set #1. For example, a bit value of "0" indicates that the corresponding cell is not scheduled, while a bit value of "1" indicates that the corresponding cell is scheduled; or vice versa. In some instances, the UE may be configured with up to 4 cells for multi-cell scheduling (e.g., N≤4).

[0115] Field #B2 of the DCI format may indicate frequency domain resource assignments. For example, field #B2 may include multiple RBG-based indicators, each of which may correspond to a cell in cell set #1 and indicate an assigned or scheduled RB (e.g., RBG) on the corresponding cell.

[0116] The multiple RBG-based indicators in field #B2 may be arranged according to a predefined order. For example, the multiple RBG-based indicators in field #B2 are sorted in ascending (or descending) order of the serving cell index or carrier frequency of the cells within cell set #1. The size (e.g., number of bits) of each of the multiple RBG-based indicators is independently determined based on the resource allocation type of the corresponding cell, the RBG granularity of the corresponding cell, and one of the following: the associated carrier bandwidth of the corresponding cell, the maximum bandwidth among the bandwidth part (BWP) of the corresponding cell, and the bandwidth of the currently active BWP of the corresponding cell. The payload size of the DCI format may be determined based on the total number of bits required for field #B2.

[0117] For example, assume that cell set #1 includes CC 1, CC 2, ..., and CC N, and further assume that the RBG-based allocation indicator of CC 1 requires C1 bits, the RBG-based allocation indicator of CC 2 requires C2 bits, the RBG-based allocation indicator of CC 3 requires C3 bits, and the RBG-based allocation indicator of CC N requires C N The unit digit represents C = C1 + C2 + C3 + ... + C N , then these C NRBG-based indicators are placed in field #B2 in a predefined order, as mentioned above, and the size of field #B2 may be equal to C bits.

[0118] For example, for CC i(i∈{1,2,…,N}), C i It can be expressed as: when resource allocation type 0 is adopted for CC i, Or when resource allocation type 1 is adopted for CC i, Where Z i represents the number of RBs of CC i and P i represents the RBG granularity of CC i, which may be based on the RBG configuration and associated bandwidth of CC i.

[0119] In some embodiments of the present disclosure, the RBG granularity indicated by the FDRA for multi-cell scheduling is dynamically interpreted according to the number of cells actually scheduled by the DCI format. For example, depending on the number of cells scheduled by the DCI format (e.g., the number of cells in cell set #2, which may be indicated by field #B1 of the DCI format), the RBG granularity associated with the RBG-based indicator in field #B2 of the DCI format may be dynamically interpreted, for example, it may be the same as or different from the RBG granularity of the corresponding cell.

[0120] For example, in the case where the number of cells in cell set #2 is greater than a threshold, the RBG granularity associated with the RBG-based indicator corresponding to each cell in cell set #2 is the RBG granularity of the corresponding cell in cell set #2. For example, in the case where the number of cells in cell set #2 is less than or equal to a threshold, the RBG granularity associated with the RBG-based indicator corresponding to each cell in cell set #2 is less than or equal to the RBG granularity of the corresponding cell in cell set #2. The threshold may be, for example, predefined in a standard or configured by the BS, for example, via RRC.

[0121] For example, assume that the threshold is equal to 1. When field #B1 indicates that multiple cells among cell set #1 are scheduled by the DCI format, field #B2 may include C bits, and each RBG-based indicator in field #B2 may correspond to one cell in cell set #1. The RBG granularity associated with the RBG-based indicator corresponding to each cell in cell set #2 is the RBG granularity of the corresponding cell in cell set #2.

[0122] For example, assuming that resource allocation type 0 is adopted for cell A in cell set #2, the RBG granularity of cell A may be determined based on the following Table 1. 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.

[0123] Table 1: RBG size of P

[0124] R Configuration 1 Configuration 2 1 to 36 2 4 37 to 72 4 8 73 to 144 8 16 145 to 275 16 16

[0125] In Table 1, "R" refers to the number of RBs according to one of the following: the associated carrier bandwidth of the cell (e.g., cell A), the maximum bandwidth among the BWPs of the cell (e.g., cell A), or the bandwidth of the currently active BWP of the cell (e.g., cell A). "Configuration 1" and "Configuration 2" refer to different RBG configurations. For example, assuming that for cell A, R=35, configuration 2 is adopted, then according to Table 1, the value of the RBG granularity of cell A is 4. The value of the RBG granularity associated with the RBG-based indicator corresponding to cell A may be 4.

[0126] For example, assuming that for cell A in cell set #2, resource allocation type 1 is adopted, the RBG granularity of cell A may be equal to a predefined value, such as 1. Alternatively, the RBG granularity value of cell A may be configured by the BS and may be one of the following: 1, 2, 4, 8, 10, 12, 16, 20, 24, 28, or 32. Other RBG granularity values ​​may also be adopted.

[0127] The definitions of resource allocation type 0 and resource allocation type 1 may be found in 3GPP standard documents.

[0128] When field #B1 indicates that only a single cell in cell set #1 is scheduled by the DCI format (i.e., the number of cells actually scheduled is equal to 1), field #B2 may include C bits, and the first X bits of field #B2 may indicate a finer RBG-based allocation, where X is the number of bits required for the minimum RBG granularity allowed for the corresponding cell that satisfies the condition of X<=C (as mentioned above, C represents the size of field #B2). Based on the above principles, various methods may be used to determine the value of X.

[0129] For example, it is assumed that the DCI format schedules a single cell (denoted as cell B), and resource allocation type 0 is adopted for cell B.

[0130] In some embodiments, X can be represented as Where Z B represents the number of RBs in cell B, and P min Express satisfaction For example, the allowed or possible RBG granularity values ​​for a cell may include, but are not limited to, 1, 2, 4, 8, 10, 12, 16, 20, 24, 28, and 32. In these embodiments, the RBG granularity associated with the RBG-based indicator corresponding to cell B refers to P min .

[0131] In some embodiments, X can be represented as Where Z Brepresents the number of RBs in cell B, and P B represents the corresponding RBG granularity of cell B according to the RBG configuration and the associated bandwidth (e.g., the associated carrier bandwidth of cell B, the maximum bandwidth among the BWPs of cell B, or the bandwidth of the currently active BWP of cell B), and can be determined based on the above Table 1. In these embodiments, the RBG granularity associated with the RBG-based indicator corresponding to cell B refers to P B .

[0132] For example, it is assumed that the DCI format schedules a single cell (denoted as cell B), and resource allocation type 1 is adopted for cell B.

[0133] In some embodiments, X can be represented as And N RBG,max Indicates that when P is used min The maximum number of RBGs on cell B, for example Where Z B represents the number of RBs in cell B, and P min represents the minimum allowed RBG granularity of cell B satisfying X≤C. For example, the allowed or possible RBG granularity values ​​may include, but are not limited to, 1, 2, 4, 6, 8, 12, 16, 20, and 32. In these embodiments, the RBG granularity associated with the RBG-based indicator corresponding to cell B refers to P min .

[0134] In some embodiments, the number of RBs in a cell (eg, Z of cell B) B ) may be determined based on one of: an associated carrier bandwidth of a cell (eg, cell B), a maximum bandwidth among the BWPs of a cell (eg, cell B), or a bandwidth of a currently active BWP of a cell (eg, cell B).

[0135] At the UE side, the UE may determine the payload size of the DCI format based on, for example, the size of field #B2 (e.g., C bits). For example, the UE may determine the payload size of the DCI format according to the resource allocation type, associated bandwidth, and RBG granularity of each cell in cell set #1. The UE may blindly detect the DCI format based on a predetermined payload size. In response to receiving the DCI format, the UE may check field #B1, identify the scheduled cells and the actual RBG granularity, and then determine the assigned RBs on each of the scheduled cells.

[0136] In some examples, the number of UL transmissions or DL ​​transmissions scheduled by a DCI format (eg, the number of PDSCHs or PUSCHs) may be equal to the number of scheduled cells.

[0137] In some embodiments of the present disclosure, in the case where a single DCI format can schedule multiple cells for downlink or uplink transmission, the RBG granularity of each cell in cell set #1 can be independently configured by the BS via, for example, RRC signaling. For example, the RBG granularity of one cell in cell set #1 can be the same as or different from the RBG granularity of another cell in cell set #1.

[0138] The resource allocation type (eg, resource allocation type 0 or resource allocation type 1) of each cell in cell set #1 may be independently configured by the BS via, for example, RRC signaling.

[0139] The RBG granularity of different resource allocation types (e.g., resource allocation type 0 or resource allocation type 1) of each cell in cell set #1 may be independently configured by the BS via, for example, RRC signaling. For example, for each cell in cell set #1, when resource allocation type 0 is configured for the corresponding cell, the RBG granularity of resource allocation type 0 may be configured for the corresponding cell (expressed as RBG granularity #1). For each cell in cell set #1, when resource allocation type 1 is configured for the corresponding cell, the RBG granularity of resource allocation type 1 may be configured for the corresponding cell (expressed as RBG granularity #2). RBG granularity #1 and RBG granularity #2 may be independently configured. For example, the RBG granularity #1 and RBG granularity #2 of a certain cell may be the same or different.

[0140] In some embodiments, the allowed or possible RBG granularity values ​​may include, but are not limited to, 1, 2, 4, 8, 10, 12, 16, 20, 24, 28, and 32. For example, the BS may configure the RBG granularity of the cell according to the associated bandwidth of the cell, such as according to one of the following: the associated carrier bandwidth of the cell, the maximum bandwidth among the BWP of the cell, or the bandwidth of the currently active BWP of the cell. For example, the larger the associated bandwidth of the cell, the larger the configured RBG granularity.

[0141] The DCI format may include multiple FDRA fields, each of which corresponds to a cell in cell set #1 and indicates an assigned RB on the corresponding cell. For example, assuming that cell set #1 includes N cells, the DCI format includes N FDRA fields. The size of each FDRA field is determined independently. For a certain cell, when the active BWP changes, the FDRA field size of the cell may not change.

[0142] The size of each FDRA field may depend on the resource allocation type of the corresponding cell, the RBG granularity of the corresponding cell, and one of the following: the associated carrier bandwidth of the corresponding cell, the maximum bandwidth among the BWPs of the corresponding cell, or the bandwidth of the currently active BWP of the corresponding cell.

[0143] Multiple FDRA fields in the DCI format can independently indicate scheduled cells from cell set #1. For example, when the corresponding FDRA field of a certain cell indicates an inapplicable value, this means that this cell is not scheduled by the DCI format. When the corresponding FDRA field indicates an applicable value, this means that the cell is scheduled by the DCI format. The number of UL transmissions or DL ​​transmissions scheduled by the DCI format (for example, the number of PDSCHs or PUSCHs) may be equal to the number of scheduled cells. Using this dynamic indication based on the FDRA field, the BS can dynamically schedule any cell or cell combination within cell set #1. In this way, the DCI format does not need to include an indicator to specifically indicate the scheduled cell. That is, the scheduled cell (for example, cell set #2) among cell set #1 can be determined based on multiple FDRA fields.

[0144] In some examples, when resource allocation type 0 is applied to a cell, the corresponding FDRA field of this cell being set to all "0" may mean that the cell is not scheduled. Otherwise, this may mean that the cell is scheduled, and the FDRA field may be an RBG-based bitmap indicating the assigned RBs on the scheduled cell. As stated above, the RBG granularity of a cell (e.g., RBG granularity #1) may be configured by the BS.

[0145] In some examples, when resource allocation type 1 is applied to a cell, the corresponding FDRA field of this cell being set to all "1"s may mean that the cell is not scheduled. Otherwise, this may mean that the cell is scheduled, and the FDRA field may be an RBG-based RIV indicating the assigned RBs on the scheduled cell. As stated above, the RBG granularity of a cell (e.g., RBG granularity #2) may be configured by the BS.

[0146] By introducing RBG-based FDRA indication (e.g., RBG-based bitmap or RBG-based RIV in the FDRA field), the total size of the FDRA field of the DCI format can be reduced. For example, as stated above, the allowed or possible RBG granularity values ​​may include, but are not limited to, 1, 2, 4, 8, 10, 12, 16, 20, 24, 28, and 32. The larger the RBG granularity, the smaller the number of bits required for the corresponding FDRA field in the DCI format. Therefore, the number of bits required for the FDRA field in the multi-cell scheduling DCI format (e.g., the size of the FDRA field) can be controlled to an appropriate value.

[0147] For example, for cell C in cell set #1, when resource allocation type 0 is adopted, the size of the FDRA field corresponding to cell C in the DCI format may be based on (e.g., equal to) the number of RBGs on cell C, which may be determined by Given, where N RBG,crepresents the number of RBGs on cell C, Yc represents the number of RBs of cell C, and Pc represents the RBG granularity of cell C.

[0148] When resource allocation type 1 is adopted for cell C, the size of the FDRA field corresponding to cell C in the DCI format may be based on (e.g., equal to) Where N RBG,c represents the number of RBGs in cell C and Wherein Yc represents the number of RBs of cell C and Pc represents the RBG granularity of cell C.

[0149] In some embodiments, the number of RBs of a cell (e.g., Yc of cell C) may be determined based on one of: the associated carrier bandwidth of the cell (e.g., cell C), the maximum bandwidth among the BWPs of the cell (e.g., cell C), or the bandwidth of the currently active BWP of the cell (e.g., cell C).

[0150] At the UE side, the UE may determine the payload size of the DCI format based on, for example, the size of the multiple FDRA fields. For example, the UE may determine the payload size of the DCI format based on the resource allocation type, associated bandwidth, and RBG granularity of each cell in cell set #1. The UE may blindly detect the DCI format based on a predetermined payload size. In response to receiving the DCI format, the UE may check the FDRA field, identify the scheduled cells, and determine the assigned RBs on each of the scheduled cells.

[0151] In some embodiments of the present disclosure, in the case where a single DCI format can schedule multiple cells for downlink or uplink transmission, all cells in cell set #1 may have the same resource allocation type. For example, resource allocation type 0 is configured or predefined for all cells in cell set #1. All cells in cell set #1 may have the same RBG granularity, which may be configured by the BS, for example, via RRC signaling or predefined, for example, in the standard. In some embodiments, the RBG granularity of cell set #1 may be configured or predefined according to the total bandwidth of cell set #1. The possible RBG granularity values ​​allowed may include, but are not limited to, 1, 2, 4, 8, 10, 12, 16, 20, 24, 28, 32, 40, 50, and 64.

[0152] All cells in cell set #1 may be aggregated to form a virtual cell. The method for forming a virtual cell and the method for indexing RBs on the virtual cell as described in the aforementioned embodiments may be applied here.

[0153] For example, a virtual cell may be formed by aggregating all cells in cell set #1 according to a predefined order. For example, the cells in cell set #1 may be aggregated according to a predefined order (e.g., ascending or descending order) of their cell indexes or carrier frequencies. The RBs of the virtual cell may be indexed consecutively from the lowest RB of the first cell in the aggregated cells to the highest RB of the last cell in the aggregated cells.

[0154] For example, assume that the UE is configured with a set of cells (i.e., cell set #1) for multi-cell scheduling via a single DCI format (including CC 1, CC 2, ..., and CC N, CC 1 includes k1 RBs, CC 2 includes k2 RBs, CC 3 includes k3 RBs, ..., and CC N includes k N RBs, thus Y = k1 + k2 + k3 + ... + k N ), then these Y RBs are numbered consecutively as RB0, RB1, ..., RB from the lowest RB of the first cell in the aggregated cells to the highest RB of the last cell in the aggregated cells. y-1 . Figure 4 An example virtual cell is shown in FIG.

[0155] The DCI format may include a single FDRA field (denoted as field #D) indicating the assigned or scheduled RBGs on the virtual cell. For example, field #D may be an RBG-based bitmap or an RBG-based RIV. For example, field #D may be an RBG-based bitmap indicating the assigned or scheduled RBGs on the virtual cell, which may be mapped to at least one complete RBG or at least one partial RBG on at least one cell in cell set #1. When at least one RB of the assigned or scheduled RBG is located on a cell in cell set #1, it means that the cell is scheduled by the DCI format. When none of the assigned or scheduled RBGs is located on a cell in cell set #1, it means that the cell is not scheduled by the DCI format. The size of field #D may depend on the total bandwidth of cell set #1 and the RBG granularity of cell set #1. As stated above, the cells in cell set #1 may have the same RBG granularity.

[0156] Field #D may jointly indicate the cells scheduled by the DCI format and the scheduled RBs on the scheduled cells. For example, when field #D indicates that there are no complete or partial RBGs on a cell in cell set #1, this means that this cell is not scheduled by the DCI format. When field #D indicates that there are at least one complete RBG or at least one partial RBG on the cell, this means that this cell is scheduled by the DCI format. When at least one RB of the assigned or scheduled RBG is located on a cell in cell set #1, it means that the cell is scheduled by the DCI format. When none of the assigned or scheduled RBGs is located on a cell in cell set #1, it means that the cell is not scheduled by the DCI format. The number of UL transmissions or DL ​​transmissions scheduled by the DCI format (e.g., the number of PDSCHs or PUSCHs) may be equal to the number of scheduled cells. Using this dynamic indication based on the FDRA field, the BS can dynamically schedule any cell or combination of cells within cell set #1. In this way, the DCI format does not need to include an indicator to specifically indicate the scheduled cell.

[0157] By introducing RBG-based FDRA indication (eg, RBG-based bitmap or RBG-based RIV in the FDRA field), the overall size of the FDRA field in the DCI format may be reduced.

[0158] For example, as stated above, the allowed or possible RBG granularity values ​​may include, but are not limited to, 1, 2, 4, 8, 10, 12, 16, 20, 24, 28, 32, 40, 50, and 64. The larger the RBG granularity, the smaller the number of bits required for field #D in the DCI format. Therefore, the number of bits required for the FDRA field in the multi-cell scheduling DCI format (e.g., the size of field #D) can be controlled to an appropriate value.

[0159] For example, the size of field #D in the DCI format may be based on (e.g., equal to) the number of total RBGs on the virtual cell, which may be determined by Given, where N RBG represents the number of RBGs of the virtual cell, Y represents the total number of RBs of the virtual cell and P represents the RBG granularity configured for cell set #1.

[0160] At the UE side, the UE may determine the payload size of the DCI format based on, for example, the size of field #D. For example, the UE may determine the payload size of the DCI format based on the resource allocation type, the bandwidth of cell set #1, and the RBG granularity of cell set #1. The UE may blindly detect the DCI format based on a predetermined payload size. In response to receiving the DCI format, the UE may check field #D, identify the scheduled cells, and determine the assigned RBs on each of the scheduled cells.

[0161] Figure 7 Flowchart illustrating an exemplary process 700 for wireless communication according to some embodiments of the present disclosure. Figure 7 In some examples, the process may be performed by a UE (e.g., Figure 1 UE 101 in executes.

[0162] refer to Figure 7 In operation 711, the UE may receive from the BS a DCI format that schedules a first group of cells (e.g., cell set #2) among a second group of cells (e.g., cell set #1) configured by the BS for the UE, wherein the DCI format includes a first field indicating whether one or more cells are scheduled by the DCI format and a second field for indicating frequency domain resource assignment.

[0163] In some embodiments of the present disclosure, the first field and the second field may be field #A1 and field #A2 as described above, respectively. In some embodiments of the present disclosure, the first field and the second field may be field #B1 and field #B2 as described above, respectively.

[0164] In operation 713, the UE may determine the RBs assigned on the first group of cells based on the first and second fields. In operation 715, the UE may receive downlink transmissions from the BS on the assigned RBs if the DCI format schedules downlink transmissions (e.g., PDSCH), or transmit uplink transmissions to the BS on the assigned RBs if the DCI format schedules uplink transmissions (e.g., PUSCH).

[0165] In some embodiments of the present disclosure, the size of the first field is equal to one bit. In some embodiments of the present disclosure, the first field indicates a first group of cells, and the size of the first field depends on the number of cells in the second group of cells.

[0166] In some embodiments of the present disclosure, the number of downlink transmissions or uplink transmissions is equal to the number of cells in the first group of cells.

[0167] In some embodiments of the present disclosure, the second field indicates a set of interlaces on a bandwidth of a virtual cell formed by aggregating all cells in the second set of cells according to a predefined order.

[0168] In some embodiments of the present disclosure, the assigned RBs are RBs within the intersection of the first set of cells and the set of interlaces.

[0169] In some embodiments of the present disclosure, the interleaving is RB-based interleaving, and the total number of RB-based interleavings over the bandwidth of the virtual cell: depends on the SCS of the second group of cells; is configured by the BS; or depends on the number of RBs between two consecutive RBs of a single interleaving over the bandwidth of the virtual cell.

[0170] In some embodiments of the present disclosure, the interleaving is RBG-based interleaving, and the total number of RBG-based interleavings over the bandwidth of the virtual cell and the RBG sizes associated with the RBG-based interleavings are configured by the BS.

[0171] In some embodiments of the present disclosure, the size of the second field depends on the total number of interlaces over the bandwidth of the virtual cell.

[0172] In some embodiments of the present disclosure, the second field includes a plurality of RBG-based indicators, each of the plurality of RBG-based indicators corresponding to a cell in the second set of cells and indicating an assigned RBG on the corresponding cell.

[0173] In some embodiments of the present disclosure, the size of each RBG-based indicator among multiple RBG-based indicators depends on the resource allocation type of the corresponding cell, the RBG granularity of the corresponding cell and one of the following: the associated carrier bandwidth of the corresponding cell, the maximum bandwidth among the BWP of the corresponding cell and the bandwidth of the currently active BWP of the corresponding cell.

[0174] In some embodiments of the present disclosure, the UE may determine the RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells according to the number of cells in the first group of cells.

[0175] In some embodiments of the present disclosure, when the number of cells in the first group of cells is greater than a threshold value, the RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells is the RBG granularity of the corresponding cell in the first group of cells. In some embodiments of the present disclosure, when the number of cells in the first group of cells is less than or equal to a threshold value, the RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells is less than or equal to the RBG granularity of the corresponding cell in the first group of cells.

[0176] In some embodiments of the present disclosure, the plurality of RBG-based indicators in the second field are arranged according to a predefined order.

[0177] It should be apparent to those skilled in the art that the order of operations in the example process 700 may be changed and some operations in the example process 700 may be eliminated or modified without departing from the spirit and scope of the present disclosure.

[0178] Figure 8800 for wireless communication according to some embodiments of the present disclosure. Figure 8 In some examples, the process may be performed by a UE (e.g., Figure 1 UE 101 in executes.

[0179] refer to Figure 8 In operation 811, the UE may receive a DCI format from the BS that schedules a first group of cells (e.g., cell set #2) among a second group of cells (e.g., cell set #1) configured by the BS for the UE, wherein the DCI format includes at least one FDRA field.

[0180] In some embodiments of the present disclosure, at least one FDRA field may be a plurality of FDRA fields as described above. In some embodiments of the present disclosure, at least one FDRA field may be field #D as described above.

[0181] In operation 813, the UE may determine the first group of cells based on the at least one FDRA field. In operation 815, the UE may determine the RBs assigned on the first group of cells based on the at least one FDRA field.

[0182] In operation 817, the UE may receive downlink transmission from the BS on the assigned RBs when the DCI format schedules downlink transmission (e.g., PDSCH), or transmit uplink transmission to the BS on the assigned RBs when the DCI format schedules uplink transmission (e.g., PUSCH).

[0183] In some embodiments of the present disclosure, the number of downlink transmissions or uplink transmissions is equal to the number of cells in the first group of cells.

[0184] In some embodiments of the present disclosure, each of the at least one FDRA field corresponds to a cell in the second set of cells and indicates an assigned RB on the corresponding cell.

[0185] In some embodiments of the present disclosure, the size of each FDRA field in at least one FDRA field depends on the resource allocation type of the corresponding cell, the RBG granularity of the corresponding cell, and one of the following: the associated carrier bandwidth of the corresponding cell, the maximum bandwidth among the BWP of the corresponding cell, or the bandwidth of the currently active BWP of the corresponding cell.

[0186] In some embodiments of the present disclosure, determining the first group of cells based on at least one FDRA field includes: for each cell in the second group of cells, determining that the corresponding cell is not scheduled by the DCI format when the corresponding FDRA field in at least one FDRA field indicates an inapplicable value; or determining that the corresponding cell is scheduled by the DCI format when the corresponding FDRA field in at least one FDRA field indicates an applicable value.

[0187] In some embodiments of the present disclosure, the RBG granularity of each cell in the second group of cells is independently configured by the BS. In some embodiments of the present disclosure, the resource allocation type of each cell in the second group of cells is independently configured by the BS. In some embodiments of the present disclosure, the RBG granularity of different resource allocation types of each cell in the second group of cells is independently configured by the BS.

[0188] In some embodiments of the present disclosure, the configured RBG granularity of a cell in the second group of cells depends on one of: an associated carrier bandwidth of the cell, a maximum bandwidth among the BWPs of the cell, or a bandwidth of a currently active BWP of the cell.

[0189] In some embodiments of the present disclosure, all cells in the second group of cells have the same resource allocation type. In some embodiments of the present disclosure, all cells in the second group of cells have the same RBG granularity, which depends on the total bandwidth of the second group of cells.

[0190] In some embodiments of the present disclosure, the at least one FDRA field includes a single FDRA field indicating an assigned RBG on a virtual cell formed by aggregating all cells in the second group of cells according to a predefined order.

[0191] In some embodiments of the present disclosure, the size of a single FDRA field depends on the total bandwidth of the second group of cells and the RBG granularity of the second group of cells.

[0192] In some embodiments of the present disclosure, determining the first group of cells based on at least one FDRA field includes: for each cell in the second group of cells, determining that the corresponding cell is not scheduled by the DCI format when a single FDRA field indicates that there is no complete or partial RBG on the corresponding cell; or determining that the corresponding cell is scheduled by the DCI format when a single FDRA field indicates that there is at least one complete RBG or at least one partial RBG on the corresponding cell.

[0193] It should be apparent to those skilled in the art that the order of operations in the example process 800 may be changed and some operations in the example process 800 may be eliminated or modified without departing from the spirit and scope of the present disclosure.

[0194] Fig. 9 Flowchart illustrating an exemplary process 900 for wireless communication according to some embodiments of the present disclosure. Fig. 9 In some examples, the process may be performed by a BS (e.g., Figure 1 BS102) in .

[0195] refer to Fig. 9 In operation 911, the BS may configure a second group of cells (e.g., cell set #1) for the UE. In operation 913, the BS may transmit a DCI format for scheduling RBs on a first group of cells (e.g., cell set #2) among the second group of cells to the UE, wherein the DCI format includes a first field indicating whether one or more cells are scheduled by the DCI format and a second field for indicating frequency domain resource assignment, and the scheduled RBs are indicated by the first and second fields.

[0196] In some embodiments of the present disclosure, the first field and the second field may be field #A1 and field #A2 as described above, respectively. In some embodiments of the present disclosure, the first field and the second field may be field #B1 and field #B2 as described above, respectively.

[0197] In operation 915, the BS may transmit a downlink transmission to the UE on the scheduled RBs when the DCI format schedules a downlink transmission (e.g., PDSCH), or receive an uplink transmission from the UE on the scheduled RBs when the DCI format schedules an uplink transmission (e.g., PUSCH).

[0198] In some embodiments of the present disclosure, the size of the first field is equal to one bit. In some embodiments of the present disclosure, the first field indicates a first group of cells, and the size of the first field depends on the number of cells in the second group of cells.

[0199] In some embodiments of the present disclosure, the number of downlink transmissions or uplink transmissions is equal to the number of cells in the first group of cells.

[0200] In some embodiments of the present disclosure, the second field indicates a set of interlaces on a bandwidth of a virtual cell formed by aggregating all cells in the second set of cells according to a predefined order.

[0201] In some embodiments of the present disclosure, the scheduled RBs are RBs within the intersection of the first set of cells and the set of interlaces.

[0202] In some embodiments of the present disclosure, the interleaving is RB-based interleaving, and the total number of RB-based interleavings over the bandwidth of the virtual cell: depends on the SCS of the second group of cells; is configured by the BS; or depends on the number of RBs between two consecutive RBs of a single interleaving over the bandwidth of the virtual cell.

[0203] In some embodiments of the present disclosure, the interleaving is RBG-based interleaving, and the total number of RBG-based interleavings over the bandwidth of the virtual cell and the RBG sizes associated with the RBG-based interleavings are configured by the BS.

[0204] In some embodiments of the present disclosure, the size of the second field depends on the total number of interlaces over the bandwidth of the virtual cell.

[0205] In some embodiments of the present disclosure, the second field includes a plurality of RBG-based indicators, each of the plurality of RBG-based indicators corresponding to a cell in the second set of cells and indicating a scheduled RBG on the corresponding cell.

[0206] In some embodiments of the present disclosure, the size of each RBG-based indicator among multiple RBG-based indicators depends on the resource allocation type of the corresponding cell, the RBG granularity of the corresponding cell and one of the following: the associated carrier bandwidth of the corresponding cell, the maximum bandwidth among the BWP of the corresponding cell and the bandwidth of the currently active BWP of the corresponding cell.

[0207] In some embodiments of the present disclosure, the BS may determine the RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells according to the number of cells in the first group of cells.

[0208] In some embodiments of the present disclosure, when the number of cells in the first group of cells is greater than a threshold value, the RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells is the RBG granularity of the corresponding cell in the first group of cells. In some embodiments of the present disclosure, when the number of cells in the first group of cells is less than or equal to a threshold value, the RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells is less than or equal to the RBG granularity of the corresponding cell in the first group of cells.

[0209] In some embodiments of the present disclosure, the plurality of RBG-based indicators in the second field are arranged according to a predefined order.

[0210] It should be apparent to those skilled in the art that the order of operations in the example process 900 may be changed and some operations in the example process 900 may be eliminated or modified without departing from the spirit and scope of the present disclosure.

[0211] Fig.101000 for wireless communication according to some embodiments of the present disclosure. Fig.10 In some examples, the process may be performed by a BS (e.g., Figure 1 BS102) in .

[0212] refer to Fig.10 In operation 1011, the BS may configure a second group of cells (e.g., cell set #1) for the UE. In operation 1013, the BS may transmit a DCI format for scheduling RBs on a first group of cells (e.g., cell set #2) among the second group of cells to the UE, wherein the DCI format includes at least one FDRA field, and the first group of cells and the scheduled RBs are indicated by the at least one FDRA field.

[0213] In some embodiments of the present disclosure, at least one FDRA field may be a plurality of FDRA fields as described above. In some embodiments of the present disclosure, at least one FDRA field may be field #D as described above.

[0214] In operation 1015, the BS may transmit a downlink transmission to the UE on the scheduled RBs when the DCI format schedules a downlink transmission (e.g., PDSCH), or receive an uplink transmission from the UE on the scheduled RBs when the DCI format schedules an uplink transmission (e.g., PUSCH).

[0215] In some embodiments of the present disclosure, the number of downlink transmissions or uplink transmissions is equal to the number of cells in the first group of cells.

[0216] In some embodiments of the present disclosure, each of the at least one FDRA field corresponds to a cell in the second set of cells and indicates a scheduled RB on the corresponding cell.

[0217] In some embodiments of the present disclosure, the size of each FDRA field in at least one FDRA field depends on the resource allocation type of the corresponding cell, the RBG granularity of the corresponding cell, and one of the following: the associated carrier bandwidth of the corresponding cell, the maximum bandwidth among the BWP of the corresponding cell, or the bandwidth of the currently active BWP of the corresponding cell.

[0218] In some embodiments of the present disclosure, the BS may, for each cell in the second group of cells: when the corresponding cell is not scheduled by the DCI format, set the corresponding FDRA field in at least one FDRA field to indicate an inapplicable value; or when the corresponding cell is scheduled by the DCI format, set the corresponding FDRA field in at least one FDRA field to indicate an applicable value.

[0219] In some embodiments of the present disclosure, the BS may perform at least one of the following: independently configuring the RBG granularity of each cell in the second group of cells; independently configuring the resource allocation type of each cell in the second group of cells; or independently configuring the RBG granularity of different resource allocation types for each cell in the second group of cells.

[0220] In some embodiments of the present disclosure, the configured RBG granularity of a cell in the second group of cells depends on one of: an associated carrier bandwidth of the cell, a maximum bandwidth among the BWPs of the cell, or a bandwidth of a currently active BWP of the cell.

[0221] In some embodiments of the present disclosure, all cells in the second group of cells have the same resource allocation type. In some embodiments of the present disclosure, all cells in the second group of cells have the same RBG granularity, which depends on the total bandwidth of the second group of cells.

[0222] In some embodiments of the present disclosure, the at least one FDRA field includes a single FDRA field indicating a scheduled RBG on a virtual cell formed by aggregating all cells in the second group of cells according to a predefined order.

[0223] In some embodiments of the present disclosure, the size of a single FDRA field depends on the total bandwidth of the second group of cells and the RBG granularity of the second group of cells.

[0224] In some embodiments of the present disclosure, the BS may: for each cell in the second group of cells, when the corresponding cell is not scheduled by the DCI format, set a single FDRA field to indicate that there is no complete or partial RBG on the corresponding cell; or when the corresponding cell is scheduled by the DCI format, set a single FDRA field to indicate that there is at least one complete RBG or at least one partial RBG on the corresponding cell.

[0225] It should be apparent to those skilled in the art that the order of operations in the example process 1000 may be changed and some operations in the example process 1000 may be eliminated or modified without departing from the spirit and scope of the present disclosure.

[0226] Fig.11 1 is a block diagram illustrating an example device 1100 according to some embodiments of the present disclosure. 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 BS.

[0227] Although in this figure, elements such as at least one transceiver 1102 and a processor 1106 are described in the singular, the plural form is also contemplated unless it is explicitly stated to be limited to the singular form. In some embodiments of the present application, the transceiver 1102 can be divided into two devices, such as a receiving circuit system and a transmitting circuit system. In some embodiments of the present application, the device 1100 may further include an input device, a memory and / or other components.

[0228] In some embodiments of the present application, the device 1100 may be a UE. The transceiver 1102 and the processor 1106 may interact with each other to perform Figures 1 to 10 In some embodiments of the present application, the device 1100 may be a BS. The transceiver 1102 and the processor 1106 may interact with each other to perform Figures 1 to 10 The operations of BS are described in .

[0229] In some embodiments of the present application, the apparatus 1100 may further include at least one non-transitory computer-readable medium.

[0230] For example, in some embodiments of the present disclosure, a non-transitory computer-readable medium may store thereon computer-executable instructions to cause the processor 1106 to implement the method for the UE as described above. For example, when the computer-executable instructions are executed, the processor 1106 interacts with the transceiver 1102 to perform Figures 1 to 10 The operations of the UE are described in .

[0231] In some embodiments of the present disclosure, a non-transitory computer-readable medium may store thereon computer-executable instructions to cause the processor 1106 to implement the method for the BS as described above. For example, when the computer-executable instructions are executed, the processor 1106 interacts with the transceiver 1102 to perform Figures 1 to 10 The operations of BS are described in .

[0232] Those of ordinary skill in the art will appreciate that the operations or 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 operations or 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, which may be incorporated into a computer program product.

[0233] Although the present disclosure has been described with respect to specific embodiments thereof, it is apparent that many alternatives, modifications, and variations may be apparent to those skilled in the art. For example, various components of the described embodiments may be interchanged, added, or replaced in other embodiments. Moreover, all elements of each figure are not necessary for the operation of the disclosed embodiments. For example, it will enable a person of ordinary skill in the art of the disclosed embodiments 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 as set forth herein are intended to be illustrative and not restrictive. Various changes may be made without departing from the spirit and scope of the present disclosure.

[0234] In this document, the term "includes", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment containing a series of elements not only contains those elements, but also may contain other elements that are not explicitly listed or inherent to this process, method, article or equipment. In the absence of more constraints, an element starting with "a", "an" or the like does not exclude the presence of additional identical elements in the process, method, article or equipment containing the element. Moreover, the term "another" is defined as at least the second or more. As used herein, the term "having" and the like are defined as "including". For example, the expression of "A and / or B" or "at least one of A and B" may include any and all combinations of words enumerated together with the expression. For example, 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 "first", "second" or the like is only used to clearly illustrate the embodiments of the present application, rather than to limit the essence of the present application.

Claims

1. A user equipment UE, comprising: Transceiver; and a processor coupled to the transceiver, wherein the processor is configured to: receiving, from a base station BS, a downlink control information DCI format for scheduling a first group of cells among a second group of cells configured by the BS for the UE, wherein the DCI format comprises a first field indicating whether one or more cells are scheduled by the DCI format and a second field for indicating frequency domain resource assignment; Determine resource blocks RB assigned to the first group of cells based on the first and second fields; and In case the DCI format schedules a downlink transmission, the downlink transmission is received from the BS on the assigned RB, or in case the DCI format schedules an uplink transmission, the uplink transmission is transmitted to the BS on the assigned RB.

2. The UE according to claim 1, wherein the size of the first field is equal to one bit; or the first field indicates the first group of cells, and the size of the first field depends on the number of cells in the second group of cells; and The second field indicates a set of interlaces over a bandwidth of a virtual cell, the virtual cell being formed by aggregating all cells in the second set of cells according to a predefined order. 3 . The UE of claim 2 , wherein the assigned RBs are RBs within an intersection of the first set of cells and the set of interlaces.

4. The UE according to claim 2, wherein the interleaving is RB-based interleaving, and the total number of RB-based interleavings over the bandwidth of the virtual cell: depending on the subcarrier spacing SCS of the second group of cells; configured by the BS; or Depends on the number of RBs between two consecutive RBs of a single interlace over the bandwidth of the virtual cell.

5. The UE according to claim 2, wherein the interleaving is RB group (RBG)-based interleaving, and the total number of RBG-based interleavings on the bandwidth of the virtual cell and the RBG size associated with the RBG-based interleaving are configured by the BS.

6. The UE of claim 1, wherein the second field comprises a plurality of RB group (RBG) based indicators, each of the plurality of RBG based indicators corresponding to a cell in the second set of cells and indicating an assigned RBG on the corresponding cell. 7 . The UE of claim 6 , wherein the processor is further configured to determine an RBG granularity associated with an RBG-based indicator corresponding to each cell in the first set of cells according to a number of cells in the first set of cells.

8. The UE of claim 7, wherein, if the number of cells in the first group of cells is greater than a threshold, the RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells is the RBG granularity of the corresponding cell in the first group of cells; or When the number of cells in the first group of cells is less than or equal to a threshold, the RBG granularity associated with the RBG-based indicator corresponding to each cell in the first group of cells is less than or equal to the RBG granularity of the corresponding cell in the first group of cells.

9. A user equipment UE, comprising: Transceiver; and a processor coupled to the transceiver, wherein the processor is configured to: receiving, from a base station BS, a downlink control information DCI format for scheduling a first group of cells among a second group of cells configured by the base station BS for the UE, wherein the DCI format comprises at least one frequency domain resource assignment FDRA field; determining the first group of cells based on the at least one FDRA field; Determine resource blocks (RBs) assigned on the first group of cells based on the at least one FDRA field; and In case the DCI format schedules a downlink transmission, the downlink transmission is received from the BS on the assigned RB, or in case the DCI format schedules an uplink transmission, the uplink transmission is transmitted to the BS on the assigned RB.

10. The UE of claim 9, wherein each of the at least one FDRA field corresponds to a cell in the second set of cells and indicates an assigned RB on the corresponding cell.

11. The UE of claim 10, wherein determining the first set of cells based on the at least one FDRA field comprises, for each cell in the second set of cells: In a case where a corresponding FDRA field in the at least one FDRA field indicates an inapplicable value, determining that the corresponding cell is not scheduled by the DCI format; or In case that the corresponding FDRA field in the at least one FDRA field indicates an applicable value, it is determined that the corresponding cell is scheduled by the DCI format.

12. The UE according to claim 9, wherein the RBG granularity of each cell in the second group of cells is independently configured by the BS; wherein the resource allocation type of each cell in the second group of cells is independently configured by the BS; or The RBG granularity of different resource allocation types of each cell in the second group of cells is independently configured by the BS.

13. The UE of claim 9, wherein the at least one FDRA field comprises a single FDRA field indicating an assigned RB group (RBG) on a virtual cell formed by aggregating all cells in the second group of cells according to a predefined order.

14. The UE of claim 13 , wherein determining the first set of cells based on the at least one FDRA field comprises, for each cell in the second set of cells: In a case where the single FDRA field indicates that there is no complete or partial RBG on the corresponding cell, determining that the corresponding cell is not scheduled by the DCI format; or In a case where the single FDRA field indicates that there is at least one complete RBG or at least one partial RBG on the corresponding cell, it is determined that the corresponding cell is scheduled by the DCI format.

15. A base station BS, comprising: Transceiver; and a processor coupled to the transceiver, wherein the processor is configured to: Configuring a second group of cells for the user equipment UE; transmitting, to the UE, a downlink control information DCI format for scheduling resource blocks (RBs) on a first group of cells among the second group of cells, wherein the DCI format comprises a first field indicating whether one or more cells are scheduled by the DCI format and a second field for indicating frequency domain resource assignment, and the scheduled RBs are indicated by the first and second fields; and In case the DCI format schedules a downlink transmission, the downlink transmission is transmitted to the UE on the scheduled RB, or in case the DCI format schedules an uplink transmission, the uplink transmission is received from the UE on the scheduled RB.

Images