NDI and RV indication methods in multi-cell scheduling scenario and related apparatuses
By determining the maximum number of schedulable TBs and using a list of cell combinations, the method addresses payload size and field size challenges in multi-cell scheduling, optimizing DCI efficiency and reducing redundant bits.
Patent Information
- Application Number
- PCT/CN2024/132659
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-09-18
AI Technical Summary
In multi-cell scheduling scenarios, determining the exact payload size of a DCI for scheduling multiple data channels across multiple cells is challenging due to payload size limitations, and determining the sizes of NDI and RV fields, as well as the number of HARQ-ACK information bits, is problematic when the maximum scheduling capability is exceeded.
A method is provided to determine the maximum number of schedulable transport blocks (TBs) by a multi-cell multi-channel scheduling DCI, which in turn allows for determining the DCI payload size, NDI field size, RV field size, and the number of HARQ-ACK information bits, using a list of cell combinations and high-layer signaling.
This approach enables accurate determination of DCI payload size and field sizes, reducing redundant bits and optimizing HARQ-ACK information, thereby enhancing scheduling efficiency and reducing unnecessary resource consumption.
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Figure CN2024132659_18092025_PF_FP_ABST
Abstract
Description
NDI AND RV INDICATION METHODS IN MULTI-CELL SCHEDULING SCENARIO AND RELATED APPARATUSESTECHNICAL FIELD
[0001] Embodiments of the present disclosure generally relate to wireless communication technology, and more particularly to new data indicator (NDI) and redundancy version (RV) indication in the scenario of multi-cell scheduling with one or multiple data channels per scheduled cell.BACKGROUND
[0002] A wireless communication system may include one or multiple network communication devices, such as base stations (BS) , which may support wireless communication for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communication system may support wireless communication with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) ) or frequency resources (e.g., subcarriers, carriers, or the like) . Additionally, the wireless communication system may support wireless communication across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) (which is also known as new radio (NR) ) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .SUMMARY
[0003] An article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. ” Further, as used herein, including in the claims, a “set” , a “group” or a “list” may include one or more elements.
[0004] Some embodiments of the present disclosure provide a UE. The UE may include at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive downlink control information (DCI) scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels; determine a maximum number of transport blocks (TBs) schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; and receive or transmit the set of data channels on the first set of cells based on the DCI.
[0005] In some embodiments, the at least one processor is configured to cause the UE to receive a list of cell combinations associated with the second set of cells, and the list of cell combinations includes at least one entry, each of which indicates one or more cells of the second set of cells and a maximum number of schedulable TBs or data channels on each of the one or more cells. In some embodiments, the maximum number of TBs schedulable by the DCI is determined based on a first entry indicated by the DCI from the at least one entry, and the first set of cells is indicated by the first entry.
[0006] In some embodiments, the at least one processor is configured to cause the UE to determine a size of an NDI field in the DCI based on the determined maximum number of TBs schedulable by the DCI.
[0007] In some embodiments, the NDI field includes a set of blocks, and each block of the set of blocks corresponds to a cell scheduled by the DCI among the first set of cells and includes a set of sub-blocks with each corresponding to a schedulable TB on a corresponding scheduled cell.
[0008] In some embodiments, the at least one processor is configured to cause the UE to determine a size of an RV field in the DCI based on the determined maximum number of TBs schedulable by the DCI.
[0009] In some embodiments, the RV field includes a set of blocks, and each block of the set of blocks corresponds to a cell scheduled by the DCI among the first set of cells and includes a set of sub-blocks with each corresponding to a schedulable TB on a corresponding scheduled cell.
[0010] In some embodiments, the set of blocks is ordered according to cell index (es) of the first set of cells. In some embodiments, the set of sub-blocks is ordered according to start transmission time (s) of TB (s) scheduled by the DCI on the corresponding scheduled cell.
[0011] In some embodiments, the set of data channels are downlink channels and the at least one processor is configured to cause the UE to: transmit hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on a maximum value of maximum numbers of TBs or data channels schedulable by the DCI among all entries in the list of cell combinations.
[0012] In some embodiments, the at least one processor is configured to cause the UE to receive the high layer signaling for configuring the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI.
[0013] In some embodiments, the indicator in the DCI indicates the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI from a set of values.
[0014] In some embodiments, the NDI field includes a set of blocks, each of which corresponds to a TB schedulable by the DCI.
[0015] In some embodiments, the RV field includes a set of blocks, each of which corresponds to a TB schedulable by the DCI.
[0016] In some embodiments, the set of blocks is ordered in a time-first frequency-second manner or a frequency-first time-second manner.
[0017] In some embodiments, the set of data channels are downlink channels and the at least one processor is configured to cause the UE to: transmit HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on the maximum number of TBs schedulable by the DCI or the maximum number of data channels schedulable by the DCI.
[0018] In some embodiments, the set of data channels are downlink channels and the at least one processor is configured to cause the UE to: transmit HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on a maximum value in the set of values.
[0019] Some embodiments of the present disclosure provide a BS. The BS may include at least one memory; and at least one processor coupled with the at least one memory and configured to cause the BS to: transmit, to a UE, a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels; determine a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; and transmit to the UE or receive from the UE the set of data channels on the first set of cells based on the DCI.
[0020] In some embodiments, the at least one processor is configured to cause the BS to transmit, to the UE, a list of cell combinations associated with the second set of cells, and the list of cell combinations includes at least one entry, each of which indicates one or more cells of the second set of cells and a maximum number of schedulable TBs or data channels on each of the one or more cells. In some embodiments, the maximum number of TBs schedulable by the DCI is determined based on a first entry indicated by the DCI from the at least one entry, and the first set of cells is indicated by the first entry.
[0021] In some embodiments, the DCI includes an NDI field having a size based on the determined maximum number of TBs schedulable by the DCI.
[0022] In some embodiments, the NDI field includes a set of blocks, and each block of the set of blocks corresponds to a cell scheduled by the DCI among the first set of cells and includes a set of sub-blocks with each corresponding to a schedulable TB on a corresponding scheduled cell.
[0023] In some embodiments, the DCI includes an RV field having a size based on the determined maximum number of TBs schedulable by the DCI.
[0024] In some embodiments, the RV field includes a set of blocks, and each block of the set of blocks corresponds to a cell scheduled by the DCI among the first set of cells and includes a set of sub-blocks with each corresponding to a schedulable TB on a corresponding scheduled cell.
[0025] In some embodiments, the set of blocks is ordered according to cell index (es) of the first set of cells. In some embodiments, the set of sub-blocks is ordered according to start transmission time (s) of TB (s) scheduled by the DCI on the corresponding scheduled cell.
[0026] In some embodiments, the set of data channels are downlink channels and the at least one processor is configured to cause the BS to: receive, from the UE, HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on a maximum value of maximum numbers of TBs or data channels schedulable by the DCI among all entries in the list of cell combinations.
[0027] In some embodiments, the at least one processor is configured to cause the BS to transmit, to the UE, the high layer signaling for configuring the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI.
[0028] In some embodiments, the indicator in the DCI indicates the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI from a set of values.
[0029] In some embodiments, the NDI field includes a set of blocks, each of which corresponds to a TB schedulable by the DCI.
[0030] In some embodiments, the RV field includes a set of blocks, each of which corresponds to a TB schedulable by the DCI.
[0031] In some embodiments, the set of blocks is ordered in a time-first frequency-second manner or a frequency-first time-second manner.
[0032] In some embodiments, the set of data channels are downlink channels and the at least one processor is configured to cause the BS to: receive, from the UE, HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on the maximum number of TBs schedulable by the DCI or the maximum number of data channels schedulable by the DCI.
[0033] In some embodiments, the set of data channels are downlink channels and the at least one processor is configured to cause the BS to: receive, from the UE, HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on a maximum value in the set of values.
[0034] Some embodiments of the present disclosure provide a processor. The processor may include at least one controller coupled with at least one memory and configured to cause the processor to: receive a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels; determine a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; and receive or transmit the set of data channels on the first set of cells based on the DCI.
[0035] Some embodiments of the present disclosure provide a processor. The processor may include at least one controller coupled with at least one memory and configured to cause the processor to: transmit, to a UE, a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels; determine a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; and transmit to the UE or receive from the UE the set of data channels on the first set of cells based on the DCI.
[0036] Some embodiments of the present disclosure provide a method for wireless communication. The method may include: receiving a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels; determining a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; and receiving or transmitting the set of data channels on the first set of cells based on the DCI.
[0037] Some embodiments of the present disclosure provide a method for wireless communication. The method may include: transmitting, to a UE, a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels; determining a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; and transmitting to the UE or receiving from the UE the set of data channels on the first set of cells based on the DCI.
[0038] Some embodiments of the present disclosure provide an apparatus. According to some embodiments of the present disclosure, the apparatus may include: at least one non-transitory computer-readable medium having stored thereon computer-executable instructions; at least one receiving circuitry; at least one transmitting circuitry; and at least one processor coupled to the at least one non-transitory computer-readable medium, the at least one receiving circuitry and the at least one transmitting circuitry, wherein the at least one non-transitory computer-readable medium and the computer executable instructions may be configured to, with the at least one processor, cause the apparatus to perform a method according to some embodiments of the present disclosure.BRIEF DESCRIPTION OF THE DRAWINGS
[0039] In order to describe the manner in which the advantages and features of the disclosure can be obtained, a description of the disclosure is rendered by reference to specific embodiments thereof, which are illustrated in the appended drawings. These drawings depict only exemplary embodiments of the disclosure and are not therefore to be considered limiting of its scope.
[0040] FIG. 1 illustrates a schematic diagram of a wireless communication system in accordance with some embodiments of the present disclosure;
[0041] FIG. 2 illustrates a schematic diagram of a DCI scheduling a plurality of channels in accordance with some embodiments of the present disclosure;
[0042] FIGs. 3A and 3B illustrate example NDI and RV fields in a DCI in accordance with some embodiments of the present disclosure;
[0043] FIGs. 4 and 5 illustrate flowcharts of wireless communication methods in accordance with some embodiments of the present disclosure;
[0044] FIG. 6 illustrates an example of a UE in accordance with some embodiments of the present disclosure;
[0045] FIG. 7 illustrates an example of a processor in accordance with some embodiments of the present disclosure; and
[0046] FIG. 8 illustrates an example of a network equipment (NE) in accordance with some embodiments of the present disclosure.DETAILED DESCRIPTION
[0047] The detailed description of the appended drawings is intended as a description of the preferred embodiments of the present disclosure and is not intended to represent the only form in which the present disclosure may be practiced. It should be understood that the same or equivalent functions may be accomplished by different embodiments that are intended to be encompassed within the spirit and scope of the present disclosure.
[0048] Reference will now be made in detail to some embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings. To facilitate understanding, embodiments are provided under a specific network architecture (s) and new service scenarios, such as the 3rd generation partnership project (3GPP) 5G NR or 6G, 3GPP LTE, and so on. It is contemplated that along with the developments of network architectures and new service scenarios, all embodiments in the present disclosure are also applicable to similar technical problems; and moreover, the terminologies recited in the present disclosure may change, which should not affect the principles of the present disclosure.
[0049] A multi-cell scheduling mechanism that allows a single DCI to schedule one or more cells with one or more channels per scheduled cell can be supported. However, due to the payload size limitation, it may be impossible to use a single DCI to schedule the maximum number of cells with the maximum number of schedulable data channels (e.g., PUSCHs or PDSCHs) per scheduled cell. Since a UE should know the exact payload size of a DCI before performing PDCCH blind detection, a problem to be solved is how to determine the exact payload size of such a DCI. Other problems include determining the sizes of some fields (e.g., NDI and RV fields) in such a DCI and determining the number of HARQ-ACK information bits in a HARQ-ACK codebook for such a DCI.
[0050] The present disclosure provides solutions to at least the above problems. For example, methods are provided for determining the sizes of the NDI and RV fields in a multi-cell multi-channel scheduling DCI format. For example, methods are provided for determining the payload size of the multi-cell multi-channel scheduling DCI format. For example, methods are provided for determining the number of HARQ-ACK information bits for the multi-cell multi-channel scheduling DCI format.
[0051] FIG. 1 illustrates a schematic diagram of wireless communication system 100 in accordance with some embodiments of the present disclosure.
[0052] The wireless communication system 100 may include one or more NEs 102 (e.g., one or more BSs) , one or more UEs 104, and a core network (CN) 106. The wireless communication system 100 may support various radio access technologies. In some implementations, the wireless communication system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communication system 100 may be a NR network, such as a 5G network, a 5G-Advanced (5G-A) network, or a 5G ultra-wideband (5G-UWB) network. In other implementations, the wireless communication system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , and IEEE 802.20. The wireless communication system 100 may support radio access technologies beyond 5G, for example, 6G. Additionally, the wireless communication system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.
[0053] The one or more NEs 102 may be dispersed throughout a geographic region to form the wireless communication system 100. One or more of the NEs 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a network function, a network entity, a radio access network (RAN) , a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. An NE 102 and a UE 104 may communicate via a communication link, which may be a wireless or wired connection. For example, an NE 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.
[0054] An NE 102 may provide a geographic coverage area for which the NE 102 may support services for one or more UEs 104 within the geographic coverage area. For example, an NE 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, an NE 102 may be moveable, for example, a satellite associated with a non-terrestrial network (NTN) . In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas may be associated with a different NE 102.
[0055] The one or more UEs 104 may be dispersed throughout a geographic region of the wireless communication system 100. A UE 104 may include or may be referred to as a remote unit, a mobile device, a wireless device, a remote device, a subscriber device, a transmitter device, a receiver device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples.
[0056] A UE 104 may be able to support wireless communication directly with other UEs 104 over a communication link. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
[0057] An NE 102 may support communication with the CN 106, or with another NE 102, or both. For example, an NE 102 may interface with another NE 102 or the CN 106 through one or more backhaul links (e.g., S1, N2, N3 or another network interface) . In some implementations, the NE 102 may communicate with each other directly. In some other implementations, the NE 102 may communicate with each other or indirectly (e.g., via the CN 106) . In some implementations, one or more NEs 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as radio heads, smart radio heads, or transmission-reception points (TRPs) .
[0058] The CN 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The CN 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management (AMF) ) functions and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more NEs 102 associated with the CN 106.
[0059] The CN 106 may communicate with a packet data network over one or more backhaul links (e.g., via an S1, N2, N3, or another network interface) . The packet data network may include an application server. In some implementations, one or more UEs 104 may communicate with the application server. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the CN 106 via an NE 102. The CN 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the CN 106 (e.g., one or more network functions of the CN 106) .
[0060] In the wireless communication system 100, the NEs 102 and the UEs 104 may use resources of the wireless communication system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communication) . In some implementations, the NEs 102 and the UEs 104 may support different resource structures. For example, the NEs 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the NEs 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the NEs 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The NEs 102 and the UEs 104 may support various frame structures based on one or more numerologies.
[0061] In some embodiments, the NEs 102 may include one or more relay nodes, integrated access and backhaul (IAB) nodes or wireless access backhaul (WAB) nodes which can provide wireless access services for UEs 104. A relay node (or an IAB node or a WAB node) can directly connect to a BS or hop through one or more relay nodes (or one or more IAB or WAB nodes) before reaching the BS.
[0062] One or more numerologies may be supported in the wireless communication system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix. A sixth numerology (e.g., μ =5) may be associated with a sixth subcarrier spacing (e.g., 480 kHz) and a normal cyclic prefix. A seventh numerology (e.g., μ=6) may be associated with a seventh subcarrier spacing (e.g., 960 kHz) and a normal cyclic prefix. For ambient IoT communication, additional numerologies (e.g., μ=-1 or μ =-2) may be introduced corresponding to 7.5 kHz or 3.75 kHz respectively.
[0063] A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.
[0064] Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communication system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings (SCSs) of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., orthogonal frequency-division multiplexing (OFDM) symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.
[0065] In the wireless communication system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communication system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the NEs 102 and the UEs 104 may perform wireless communication over one or more of the operating frequency bands. In some implementations, FR1 may be used by the NEs 102 and the UEs 104, among other equipment or devices for cellular communication traffic (e.g., control information, data) . In some implementations, FR2 may be used by the NEs 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
[0066] FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ =0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ =1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.
[0067] A UE 104 may include computing devices, such as desktop computers, laptop computers, personal digital assistants (PDAs) , tablet computers, smart televisions (e.g., televisions connected to the Internet) , set-top boxes, game consoles, security systems (including security cameras) , vehicle on-board computers, network devices (e.g., routers, switches, and modems) , or the like. According to some embodiments of the present disclosure, a UE 104 may include a portable wireless communication device, a smart phone, a cellular telephone, a flip phone, a device having a subscriber identity module, a personal computer, a selective call receiver, or any other device that is capable of sending and receiving communication signals on a wireless network. In some embodiments of the present disclosure, a UE 104 includes wearable devices, such as smart watches, fitness bands, optical head-mounted displays, or the like. Moreover, a UE 104 may be referred to as a subscriber unit, a mobile, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal, or a device, or described using other terminology used in the art. A UE 104 may communicate with an NE 102 (e.g., a BS) via uplink (UL) communication signals. An NE 102 may communicate with a UE 104 via downlink (DL) communication signals.
[0068] In some embodiments of the present disclosure, an NE 102 and a UE 104 may communicate over licensed spectrums, whereas in some other embodiments, an NE 102 and a UE 104 may communicate over unlicensed spectrums. The present disclosure is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol. Persons skilled in the art should understand that as technology develops and advances, the terminologies described in the present disclosure may change, but should not affect or limit the principles and spirit of the present disclosure.
[0069] In a wireless communication system, an NE (e.g., a BS) and a UE may communicate via DL channels and UL channels. For example, a UE may monitor a PDCCH in one or more search spaces. The PDCCH may carry a DCI, which may schedule uplink channels, such as a PUSCH, or downlink channels, such as a physical downlink shared channel (PDSCH) .
[0070] Multi-carrier operation is a crucial aspect of commercial networks (e.g., 5G) , as it enables the aggregation of different spectrum resources to provide high data rate and low latency communications.
[0071] In some embodiments, multi-cell scheduling is supported. For example, a scheduling mechanism that allows the scheduling of one or more cells with one or more DL channels (e.g., PDSCHs) or UL channels (e.g., PUSCHs) per scheduled cell by a single DCI is introduced. The one or more cells may from a set of cells configured for multi-cell scheduling. This scheduling mechanism can save UE power consumption and reduce PDCCH overhead and is especially useful when a scheduling cell in FR1 with a lower SCS schedules multiple cells in FR2 with a higher SCS. This scheduling mechanism can be referred to as multi-cell multi-channel scheduling. In some embodiments, the multi-cell multi-channel scheduling DCI may schedule a single channel on a single cell, or schedule multiple cells with one channel per scheduled cell, or schedule multiple channels on a single cell. DCI formats that can be used for such scheduling mechanism include, but are not limited to, DCI format 0_3 and DCI format 1_3.
[0072] For example, referring to FIG. 2, DCI 211 schedules more than one data channels (e.g., PUSCHs or PDSCHs) on more than one cell with one or more data channels per cell (e.g., data channels 221-224 on cell 241, data channel 225 on cell 242, data channel 226 on cell 243, and data channels 227-229 on cell 244) . The serving cell indexes of cell 241 to cell 244 can be ordered as cell 241 < cell 242 < cell 242 < cell 244.
[0073] In some embodiments, the DCI payload size may have a size limitation, for example, up to 140 bits. Considering the payload size limitation, it may be impossible to use a single multi-cell multi-channel scheduling DCI (e.g., a single DCI format 0_3 or 1_3) to schedule the maximum number of cells with the maximum number of schedulable data channels (e.g., PUSCHs or PDSCHs) per scheduled cell.
[0074] For example, for a cell set including Cell #1, Cell #2, Cell #3 and Cell #4, it is assumed that a maximum of 4 PUSCHs can be co-scheduled on Cell #1, a maximum of 4 PUSCHs can be co-scheduled on Cell #2, a maximum of 8 PUSCHs can be co-scheduled on Cell #3, and a maximum of 8 PUSCHs can be co-scheduled on Cell #4. It may be impossible to jointly schedule 4 PUSCHs on Cell #1, 4 PUSCHs on Cell #2, 8 PUSCHs on Cell #3 and 8 PUSCHs on Cell #4 by a single DCI (e.g., DCI format 0_3) due to the DCI payload size limitation. On the other hand, it may be possible to jointly schedule, for example, the combination of 2 PUSCHs on Cell #1, 2 PUSCHs on Cell #2 and 4 PUSCHs on Cell #3, the combination of 1 PUSCH on Cell #1, 1 PUSCH on Cell #2, 4 PUSCHs on Cell #3 and 4 PUSCHs on Cell #4, or the combination of 8 PUSCHs on Cell #3 and 8 PUSCHs on Cell #4, or other combinations, by a single DCI (e.g., DCI format 0_3) . Similar case happens to DL joint scheduling by the multi-cell multi-channel scheduling DCI (e.g., DCI format 1_3) . Although it is up to the BS to guarantee that the payload size of a DCI does not exceed the payload size limitation (e.g., a maximum of 140 bits) , a UE should know the exact payload size of a DCI before performing PDCCH blind detection. Therefore, a problem to be resolved is how to determine the exact payload size of a multi-cell multi-channel scheduling DCI.
[0075] Another problem is the sizes of some fields (e.g., NDI and RV fields) in the multi-cell multi-channel scheduling DCI. For example, it may lead to redundant NDI bits if the number of NDI bits in a multi-cell multi-channel scheduling DCI is determined based on the maximum scheduling capability of the DCI. This is because the multi-cell multi-channel scheduling DCI cannot actually schedule so many TBs due to the DCI payload size limitation. Similar case happens for the RV field in a DCI. That is, it may lead to redundant RV bits if the number of RV bits in a multi-cell multi-channel scheduling DCI is determined based on the maximum scheduling capability of the DCI.
[0076] Similarly, for each multi-cell multi-channel scheduling DCI (e.g., DCI format 1_3) that schedules more than one PDSCH (e.g., without HARQ-ACK bundling operation) and for which a UE transmits HARQ-ACK information in the same PUCCH group, if the number of HARQ-ACK information bits is determined based on the maximum scheduling capabilities of these DCIs, it may result in redundant HARQ-ACK information bits. This is because the multi-cell multi-channel scheduling DCI cannot actually schedule that many TBs due to the DCI payload size limitation.
[0077] For example, for a cell set including Cell #1, Cell #2, Cell #3 and Cell #4, it is assumed that a maximum of 4 PDSCHs can be co-scheduled on Cell #1, a maximum of 4 PDSCHs can be co-scheduled on Cell #2, a maximum of 8 PDSCHs can be co-scheduled on Cell #3, and a maximum of 8 PDSCHs can be co-scheduled on Cell #4. It may be impossible to jointly schedule 4 PDSCHs on Cell #1, 4 PDSCHs on Cell #2, 8 PDSCHs on Cell #3 and 8 PDSCHs on Cell #4 by a single DCI format 1_3. Assuming that a maximum of 4+4+8+8=32 HARQ-ACK information bits is determined per DCI format 1_3 scheduling more than one PDSCH, then many redundant negative ACK (NACK) bits are generated just for padding. In some embodiments, if a time domain bundling is configured per cell and the number of bundling groups is set to 1, then the redundant bits can be greatly reduced. However, this cannot solve the problem once and for all.
[0078] Embodiments of the present disclosure provide solutions for solving at least the above problems. For example, methods are provided for determining the maximum number of schedulable TBs by a multi-cell multi-channel scheduling DCI. With the help of this maximum number, the DCI payload size, the maximum number of NDI bits (i.e., the size of the NDI field) and the maximum number of RV bits (i.e., the size of the RV field) in the multi-cell multi-channel scheduling DCI as well as the number of HARQ-ACK information bits per such a DCI can be determined. More details on the embodiments of the present disclosure will be illustrated in the following text in combination with the appended drawings.
[0079] In some embodiments of the present disclosure, a set of cells (denoted as cell set #Z) may be configured for multi-cell scheduling. In some embodiments, a UE may be configured with one or more such cell for multi-cell scheduling by a BS via high layer signaling or parameters (e.g., radio recourse control (RRC) signaling) .
[0080] In some embodiments of the present disclosure, a list of cell combinations (denoted as cell combination list #A) associated with cell set #Z may be configured for a UE. For example, a BS may configure cell combination list #A for a UE via high layer signaling (e.g., RRC signaling) . In some embodiments, cell combination list #A may be predefined (e.g., in a standard (s) ) .
[0081] In some embodiments, cell combination list #A may include at least one entry, each of which indicates one or more cells of cell set #Z (e.g., by indicating the serving cell index (es) ) and the maximum number of schedulable TBs (or data channels) on each of the one or more cells. Persons skilled in the art know how to convert the number of TBs to the number of data channels, or vice versa.
[0082] In some embodiments, a multi-cell multi-channel scheduling DCI (denoted as DCI #A) may include an indicator (hereinafter, scheduled cell indicator) that indicates one entry from cell combination list #A. The maximum number of TBs schedulable by DCI #A can be determined based on the indicated entry. For example, the scheduled cell indicator can indicate one scheduled cell combination (i.e., the cell (s) actually scheduled by DCI #A within cell set #Z, which is hereinafter referred to as cell set #A) and the maximum number of TBs schedulable by DCI #A can be derived from it. The size of the scheduled cell indicator (i.e., the number of bits for this indicator) may be dependent on the number of entries in cell combination list #A. In some embodiments, if only one entry is configured for the list, the scheduled cells are all the cells in cell set #Z.
[0083] Table 1 below shows an exemplary cell combination list. It should be understood that Table 1 is only for illustrative purposes, and should not be construed as limiting the embodiments of the present disclosure. Table 1: List of scheduled cell combinations
[0084] As shown in Table 1, cell set #Z may include Cell 1 to Cell 4. Each entry in Table 1 includes the scheduled cell (s) and the maximum number of schedulable TBs of each scheduled cell. The maximum number of schedulable TBs for each scheduled cell combination is shown in the last column of Table 1 and can be determined by summing the maximum number of schedulable TBs for each cell in the corresponding scheduled cell combination. The last column of Table 1 may not be configured as it can be derived based on the information in the second column of Table 1. In some embodiments, Table 1 may indicate schedulable data channels (e.g., PDSCHs or PUSCHs) instead of schedulable TBs. Persons skilled in the art know how to convert the number of TBs to the number of data channels, or vice versa.
[0085] DCI #A may include an NDI field. The size of the NDI field may be based on the maximum number of TBs schedulable by DCI #A. In some embodiments, separate NDI indications are included for each scheduled TB on each scheduled cell. For example, the NDI field may include a set of blocks, wherein each block of the set of blocks may correspond to a cell scheduled by DCI #A among cell set #A and may include a set of sub-blocks with each corresponding to a schedulable TB on the corresponding scheduled cell.
[0086] For example, the NDI field in DCI #A may include Ncell blocks with each block corresponding to one scheduled cell. Ncell is the number of scheduled cells according to the indicated scheduled cell combination. In some embodiments, the blocks can be placed according to (e.g., in an ascending or descending order of) the cell indexes of the scheduled cells. For example, the first block corresponds to the new data indicator for the scheduled cell with the smallest serving cell index. Each block may include one or more sub-blocks with each sub-block corresponding to one schedulable TB on the corresponding scheduled cell. In some embodiments, the one or more sub-blocks can be placed according to (e.g., in an ascending or descending order of) the start transmission time (s) of TB (s) scheduled by DCI #A on the corresponding scheduled cell.
[0087] In some embodiments, each sub-block may include 1 bit. Specifically, the NDI field in DCI #A may include Ncell blocks for Ncell scheduled cells, each block includes Mi, max sub-blocks, wherein Mi, max is the maximum number of schedulable TBs for cell i according to the indicated scheduled cell combination. In that sense, the NDI field may include bits.
[0088] DCI #A may include an RV field. The size of the RV field may be based on the maximum number of TBs schedulable by DCI #A. In some embodiments, separate RV indications are included for each scheduled TB on each scheduled cell. For example, the RV field may include a set of blocks, wherein each block of the set of blocks may correspond to a cell scheduled by DCI #A among cell set #A and may include a set of sub-blocks with each corresponding to a schedulable TB on the corresponding scheduled cell.
[0089] For example, the RV field in DCI #A may include Ncell blocks with each block corresponding to one scheduled cell. Ncell is the number of scheduled cells according to the indicated scheduled cell combination. In some embodiments, the blocks can be placed according to (e.g., in an ascending or descending order of) the cell indexes of the scheduled cells. For example, the first block corresponds to the RV for the scheduled cell with the smallest serving cell index. Each block may include one or more sub-blocks with each sub-block corresponding to one schedulable TB on the corresponding scheduled cell. In some embodiments, the one or more sub-blocks can be placed according to (e.g., in an ascending or descending order of) the start transmission time (s) of TB (s) scheduled by DCI #A on the corresponding scheduled cell.
[0090] In some embodiments, each sub-block may include 0, 1 or 2 bits, which is determined, for example, by a high layer parameter configured for the cell corresponding to the block. Specifically, the RV field in DCI #A may include Ncell blocks for Ncell scheduled cells, each block includes Mi, max sub-blocks, wherein Mi, max is the maximum number of schedulable TBs for cell i according to the indicated scheduled cell combination, and each sub-block may include Ki bits, wherein Ki is the number of bits configured by a high layer parameter for cell i. In that sense, a block corresponding to cell i of the RV field may have Mi, max*Ki bits according to the indicated scheduled cell combination, and the RV field may include Ki bits.
[0091] From the perspective of a UE, in response to detecting a multi-cell multi-channel scheduling DCI, the UE may determine the scheduled cells and the maximum number of schedulable TBs (or data channels) per scheduled cell based on the scheduled cell indicator in the DCI. The UE may also determine the actually scheduled TBs (or data channels) per scheduled cell based on a time domain resource allocation (TDRA) field in the DCI. For example, the TDRA field may point to one row from the joint time domain resource allocation table.
[0092] For the NDI field in the DCI, its size may be based on (e.g., equal to) the maximum number of schedulable TBs by the DCI, the number of blocks may be based on (e.g., equal to) the number of scheduled cells, and the number of sub-blocks for each block may be based on (e.g., equal to) the maximum number of schedulable TBs for the corresponding cell. In some cases, there may be one or more sub-blocks with padding bits placed at the end of a block if the number of actually scheduled TBs for a corresponding cell is smaller than the maximum number of schedulable TBs of this cell.
[0093] Similarly, for the RV field, its size may be based on the maximum number of schedulable TBs by the DCI, the number of blocks may be based on (e.g., equal to) the number of scheduled cells, and the number of sub-blocks for each block may be based on (e.g., equal to) the maximum number of schedulable TBs for the corresponding cell. In some cases, there may be one or more sub-blocks with padding bits placed at the end of a block if the number of actually scheduled TBs for a corresponding cell is smaller than the maximum number of schedulable TBs of this cell.
[0094] Hence, for each scheduled cell combination in the cell combination list, the number of bits of NDI for each scheduled cell in a DCI may be equal to the maximum number of schedulable TBs for the cell, and the number of sub-blocks of RV for each scheduled cell in the DCI may be equal to the maximum number of schedulable TBs for the cell.
[0095] For example, referring to FIG. 2, assuming that cell set #Z includes cell 241 to cell 244 and the scheduled cell indicator in DCI 211 indicates entry 6 in Table 1, then 3 cells (cell 241, cell 242, and cell 243) are scheduled, i.e., Ncell=3. FIG. 3A shows an example of the NDI field and RV field for DCI 211. That is, each of the NDI field and RV field in DCI 211 includes 3 blocks, i.e., blocks 301-303 for the NDI field and blocks 371-373 for the RV field. Blocks 301-303 may correspond to cell 241, cell 242, and cell 243, respectively. Blocks 371-373 may correspond to cell 241, cell 242, and cell 243, respectively.
[0096] Furthermore, based on entry 6 in Table 1, a maximum of 2 TBs can be scheduled on cell 241, a maximum of 2 TBs can be scheduled on cell 242, and a maximum of 4 TBs can be scheduled on cell 243. Therefore, for NDI, block 301 includes 2 sub-blocks (i.e., sub-blocks 311 and 312) with each sub-block corresponding to one schedulable TB and including either one NDI bit or one padding bit, block 302 includes 2 sub-blocks (i.e., sub-blocks 321 and 322) with each sub-block corresponding to one schedulable TB and including either one NDI bit or one padding bit, and block 303 includes 4 sub-blocks (i.e., sub-blocks 331 to 334) with each sub-block corresponding to one schedulable TB and including either one NDI bit or one padding bit. The size of the NDI field in DCI 211 may be equal to 8 bits. There may be one or more sub-blocks with padding bit (s) placed at the end of a block if the number of actually scheduled TBs for the corresponding cell is smaller than the maximum number of schedulable TBs of the cell. For example, if the number of actually scheduled TBs for cell 243 is 2 according the TDRA indication, then sub-blocks 331 and 332 include 2 NDI bits, which are placed at the beginning of block 303 for the scheduled 2 TBs while sub-blocks 333 and 334 include 2 padding bits placed at the end of block 303.
[0097] It is further assumed that the high layer parameter (s) configure a 2-bit RV for cell 241 and cell 242 and a 1-bit RV for cell 243. Then, block 371 includes 2 sub-blocks (i.e., sub-blocks 341 and 342) with each sub-block including 2 bits and corresponding to one schedulable TB, block 372 includes 2 sub-blocks (i.e., sub-blocks 351 and 352) with each sub-block including 2 bits and corresponding to one schedulable TB, and block 373 includes 4 sub-blocks (i.e., sub-blocks 361 to 364) with each sub-block including 1 bit and corresponding to one schedulable TB. Therefore, the total 8 RV sub-blocks include a total of 2*2+2*2+4*1=12 bits and the size of the RV field in DCI 211 may be equal to 12 bits.
[0098] In some embodiments, the payload size of DCI #A may be determined based on the configuration of the corresponding active bandwidth part (s) of the scheduled cells in the entry which results in the largest size among all the entries of the cell combination list, considering, for example, the largest size of NDI bits and the largest size of RV bits for each scheduled cell combination. For example, for each scheduled cell combination in the cell combination list, a corresponding DCI payload size can be determined. Determining the corresponding DCI payload size may include determining the sizes of various fields in the DCI including, for example, determining the size of the frequency domain resource allocation (FDRA) field based on the configuration of the corresponding active bandwidth part (s) of the scheduled cells in the scheduled cell combination, and determining the sizes of the NDI and RV fields according to the methods as described above. The final DCI payload size can be determined based on the largest one among all the determined DCI payload sizes.
[0099] In some embodiments, DCI #A may schedule downlink data channel (s) (e.g., PDSCH (s) ) . A UE may transmit HARQ-ACK information bit (s) for the downlink channel (s) (also referred to as HARQ-ACK information bit (s) corresponding to the DCI) . In some embodiments, the number of the HARQ-ACK information bits may be based on the maximum value of maximum numbers of TBs or data channels schedulable by DCI #A among all entries in the list of cell combinations.
[0100] For example, the UE may transmit, to the BS, the HARQ-ACK information bit (s) corresponding to DCI #A in a Type-2 HARQ-ACK codebook. The codebook may include a sub-codebook including HARQ-ACK information bits for each multi-cell multi-channel scheduling DCI that schedules more than one PDSCH (e.g., when spatial domain bundling is not configured for the cell set or time domain bundling is not configured for any cell of the cell set) . The number of HARQ-ACK information bits for such a DCI may be determined based on the maximum number of TBs or data channels which can be co-scheduled by a single DCI in the PUCCH group for the UE. In some examples, the maximum number of TBs or data channels which can be co-scheduled by a single DCI in the PUCCH group may be equal to the maximum number of schedulable TBs or data channels by the DCI among all the scheduled cell combinations of all the configured cell sets within the same PUCCH group.
[0101] For example, as shown in Table 1, the maximum number of TBs which can be co-scheduled by a single DCI #A is equal to 16. In some examples, if the time domain bundling or spatial domain bundling is not configured, for each DCI #A that schedules more than one PDSCH, 16 HARQ-ACK information bits may be generated with each bit corresponding to either one scheduled TB or a necessary padding bit (e.g., NACK bit) . In some examples, different cell sets and different cell combination lists may be configured for multi-cell scheduling. For example, a cell combination list different from Table 1 may indicate a maximum number of TBs which can be co-scheduled by a DCI among all scheduled cell combinations in this list being 18, when HARQ-ACK information bits for a DCI associated with this list and a DCI associated with Table 1 are to be transmitted in the same PUCCH, 18 HARQ-ACK information bits may be generated for each of these DCIs.
[0102] In some embodiments of the present disclosure, for cell set #Z, a UE may be configured with the maximum number of TBs schedulable by a multi-cell multi-channel scheduling DCI (denoted as DCI #B) or the maximum number of data channels (e.g., PUSCHs or PDSCHs) schedulable by the DCI. For example, the maximum number of TBs or data channels schedulable by DCI #B may be configured by the BS from a set of possible values, e.g., {4, 8, 12, 16, 20, 24} , via high layer signaling (e.g., RRC signaling) . The set of possible values may be configured by the BS to the UE or predefined (e.g., in a standard (s) ) . Persons skilled in the art know how to convert the number of TBs to the number of data channels, or vice versa.
[0103] From the perspective of a UE, in response to detecting a multi-cell multi-channel scheduling DCI, the UE may determine the scheduled cells based on the scheduled cell indicator in the DCI. For example, the scheduled cell indicator may points to one row from a list of scheduled cell combinations. The UE may also determine the actually scheduled TBs (or data channels) per scheduled cell based on the TDRA field in the DCI. For example, the TDRA field may point to one row from the joint time domain resource allocation table.
[0104] DCI #B may include an NDI field. The size of the NDI field may be based on the maximum number of TBs schedulable by DCI #B. In some embodiments, separate NDI indications are included for each scheduled TB on each scheduled cell. For example, the NDI field may include a set of blocks, wherein each block of the set of blocks may correspond to a TB schedulable by DCI #B.
[0105] For example, the NDI field in DCI #B may include Nmax blocks with each block corresponding to one schedulable TB. Nmax is the maximum number of TBs schedulable by DCI #B as configured or determined based on the maximum number of data channels schedulable by DCI #B as configured. In some embodiments, the blocks can be placed according to a time-first frequency-second manner or a frequency-first time-second manner. For example, the blocks can be placed firstly according to (e.g., in an ascending or descending order of) the start transmission time (s) of TB (s) scheduled by DCI #B on the same scheduled cell and then according to (e.g., in an ascending or descending order of) the cell indexes of the scheduled cells. For example, the blocks can be placed firstly according to (e.g., in an ascending or descending order of) the cell indexes of the scheduled cells at the same TB start transmission time and then according to (e.g., in an ascending or descending order of) the start transmission time (s) of scheduled TB (s) .
[0106] Each block may include 1 bit. Specifically, the NDI field in DCI #B may include Nmax blocks for the cells scheduled by DCI #B, each block may include either one bit for one scheduled TB or one padding bit. In that sense, the NDI field may include Nmax bits. In some cases, there may be one or more blocks with padding bits placed at the end of the NDI field if the number of actually scheduled TBs by the DCI is smaller than the maximum number of schedulable TBs by the DCI.
[0107] DCI #B may include an RV field. The size of the RV field may be based on the maximum number of TBs schedulable by DCI #B. In some embodiments, separate RV indications are included for each scheduled TB on each scheduled cell. For example, the RV field may include a set of blocks, wherein each block of the set of blocks may correspond to a TB schedulable by DCI #B.
[0108] For example, the RV field in DCI #B may include Nmax blocks with each block corresponding to one schedulable TB. Nmax is the maximum number of TBs schedulable by DCI #B as configured or determined based on the maximum number of data channels schedulable by DCI #B as configured. In some embodiments, the blocks can be placed according to a time-first frequency-second manner or a frequency-first time-second manner. For example, the blocks can be placed firstly according to (e.g., in an ascending or descending order of) the start transmission time (s) of TB (s) scheduled by DCI #B on the same scheduled cell and then according to (e.g., in an ascending or descending order of) the cell indexes of the scheduled cells. For example, the blocks can be placed firstly according to (e.g., in an ascending or descending order of) the cell indexes of the scheduled cells at the same TB start transmission time and then according to (e.g., in an ascending or descending order of) the start transmission time (s) of scheduled TB (s) .
[0109] Each block may include 0, 1 or 2 bits, which is determined, for example, by a high layer parameter configured for the cell corresponding to the block. Specifically, the RV field in DCI #B may include Nmax blocks for the cells scheduled by DCI #B, each block may include K′i bits, wherein K′i is the number of bits configured by a high layer parameter for the cell where TB i is scheduled. In that sense, the RV field may include bits. In some cases, there may be one or more blocks with padding bits placed at the end of the RV field if the total number of actually scheduled TBs by the DCI is smaller than the maximum number of schedulable TBs by the DCI. For these cases, in some embodiments, a predefined bit size (e.g., 1 bit) is assumed for each un-scheduled block. In some other embodiments, if the total number of actually scheduled TBs by the DCI is smaller than the maximum number of schedulable TBs by the DCI, one or multiple padding bits are placed at the end of the DCI until the total payload size after padding is equal to the determined payload size of the DCI format.
[0110] FIG. 3B shows an example of the NDI field and RV field for DCI #B. It is assumed that a UE is configured with a maximum of 12 schedulable TBs by a multi-cell multi-channel scheduling DCI. The NDI field and RV field in the DCI may include 12 blocks, i.e., including at least blocks 381-383 for the NDI field and at least blocks 391-393 for the RV field. Each of 12 blocks in the NDI field or RV field may correspond to one schedulable TB. In some examples, the 12 blocks may be placed firstly according to an ascending order of the start transmission time of scheduled TB on the same cell and then according to an ascending order of the serving cell index of the scheduled cell. Each block in the NDI field may include 1 bit. Each block in the RV field may include 0, 1 or 2 bits.
[0111] It is further assumed that the number of TBs actually scheduled by DCI #B is 8 according to, for example, the TDRA indication. Then, the first 8 blocks of the NDI field may include 8 NDI bits placed at the beginning of the NDI field while the last 4 blocks of the NDI field may include 4 padding bits placed at the end of the NDI field. Similarly, the last 4 blocks of the RV field may include 4 padding bits placed at the end of the RV field.
[0112] In some embodiments, the payload size of DCI #B may be determined based on the configuration of the corresponding active bandwidth part (s) of the scheduled cells in the entry which results in the largest size among all the entries of the cell combination list, considering, for example, the Nmax NDI blocks and the Nmax RV blocks for each scheduled cell combination. Here, the cell combinations in the cell combination list may not include the maximum number of schedulable TBs of each scheduled cell as in Table 1. For example, for each scheduled cell combination in the cell combination list, a corresponding DCI payload size can be determined. Determining the corresponding DCI payload size may include determining the sizes of various fields in the DCI, including for example, determining the size of the FDRA field based on the configuration of the corresponding active bandwidth part (s) of the scheduled cells in the scheduled cell combination, and determining the sizes of the NDI and RV fields according to the methods as described above. The final DCI payload size can be determined based on the largest one among all the determined DCI payload sizes.
[0113] In some embodiments, DCI #B may schedule downlink data channel (s) (e.g., PDSCH (s) ) . A UE may transmit HARQ-ACK information bit (s) for the downlink channel (s) (also referred to as HARQ-ACK information bit (s) corresponding to the DCI) . In some embodiments, the number of the HARQ-ACK information bits may be based on the configured maximum numbers of TBs or data channels schedulable by DCI #B.
[0114] For example, the UE may transmit, to the BS, the HARQ-ACK information bit (s) corresponding to DCI #B in a Type-2 HARQ-ACK codebook. The codebook may include a sub-codebook including HARQ-ACK information bits for each multi-cell multi-channel scheduling DCI that schedules more than one PDSCH (e.g., when spatial domain bundling is not configured for the cell set or time domain bundling is not configured for any cell of the cell set) . The number of HARQ-ACK information bits for such a DCI may be determined based on the maximum number of TBs or data channels which can be co-scheduled by a single DCI in the PUCCH group for the UE. In some examples, the maximum number of TBs or data channels which can be co-scheduled by a single DCI in the PUCCH group may be equal to the maximum value among all the configured maximum numbers of schedulable TBs or data channels of all the configured cell sets within the same PUCCH group.
[0115] For example, assuming that the maximum number of TBs which can be co-scheduled by a single DCI #B is configured as 12. If the time domain bundling or spatial domain bundling is not configured, for each DCI #B that schedules more than one PDSCH, 12 HARQ-ACK information bits may be generated with each bit corresponding to either one scheduled TB or a necessary padding bit (e.g., NACK bit) . In some examples, different cell sets for multi-cell scheduling and different maximum schedulable TB numbers may be configured. For example, another maximum schedulable TB number may be configured as 16, when HARQ-ACK information bits for DCIs associated with the different cell sets corresponding to the different maximum schedulable TB numbers are to be transmitted in the same PUCCH, 16 HARQ-ACK information bits may be generated for each of these DCIs.
[0116] In some embodiments of the present disclosure, for cell set #Z, a set of maximum numbers of schedulable TBs or data channels (e.g., PUSCHs or PDSCHs) per a multi-cell multi-channel scheduling DCI (denoted as DCI #C) , e.g., {4, 8, 12, 16} , may be configured by a BS for a UE via high layer signaling (e.g., RRC signaling) . Persons skilled in the art know how to convert the number of TBs to the number of data channels, or vice versa. In some embodiment, the set of maximum numbers may be predefined (e.g., in a standard (s) ) . An indicator (hereinafter, indicator #C) in DCI #C may indicate one value from the set of maximum numbers.
[0117] From the perspective of a UE, in response to detecting a multi-cell multi-channel scheduling DCI, the UE may determine the scheduled cells based on the scheduled cell indicator in the DCI and determine the maximum number of schedulable TBs (or data channels) by the DCI based on indicator #C in the DCI. The UE may also determine the actually scheduled TBs (or data channels) per scheduled cell based on the TDRA field in the DCI. For example, the TDRA field may point to one row from the joint time domain resource allocation table.
[0118] DCI #C may include an NDI field. The size of the NDI field may be based on the maximum number of TBs schedulable by DCI #C. In some embodiments, separate NDI indications are included for each scheduled TB on each scheduled cell. For example, the NDI field may include a set of blocks, wherein each block of the set of blocks may correspond to a TB schedulable by DCI #C.
[0119] For example, the NDI field in DCI #C may include N′max blocks with each block corresponding to one schedulable TB. N′max is the maximum number of TBs schedulable by DCI #C indicated by indicator #C or determined based on the maximum number of data channels schedulable by DCI #C as indicated by indicator #C. In some embodiments, the blocks can be placed according to a time-first frequency-second manner or a frequency-first time-second manner. For example, the blocks can be placed firstly according to (e.g., in an ascending or descending order of) the start transmission time (s) of TB (s) scheduled by DCI #C on the same scheduled cell and then according to (e.g., in an ascending or descending order of) the cell indexes of the scheduled cells. For example, the blocks can be placed firstly according to (e.g., in an ascending or descending order of) the cell indexes of the scheduled cells at the same TB start transmission time and then according to (e.g., in an ascending or descending order of) the start transmission time (s) of scheduled TB (s) .
[0120] Each block may include 1 bit. Specifically, the NDI field in DCI #C may include N′max blocks for the cells scheduled by DCI #C, each block may include either 1 bit for one scheduled TB or one padding bit. In that sense, the NDI field may include N′max bits. In some cases, there may be one or more blocks with padding bits placed at the end of the NDI field if the number of actually scheduled TBs by the DCI is smaller than the maximum number of schedulable TBs by the DCI.
[0121] DCI #C may include an RV field. The size of the RV field may be based on the maximum number of TBs schedulable by DCI #C. In some embodiments, separate RV indications are included for each scheduled TB on each scheduled cell. For example, the RV field may include a set of blocks, wherein each block of the set of blocks may correspond to a TB schedulable by DCI #C.
[0122] For example, the RV field in DCI #C may include N′max blocks with each block corresponding to one schedulable TB. N′max is the maximum number of TBs schedulable by DCI #C indicated by indicator #C or determined based on the maximum number of data channels schedulable by DCI #C as indicated by indicator #C. In some embodiments, the blocks can be placed according to a time-first frequency-second manner or a frequency-first time-second manner. For example, the blocks can be placed firstly according to (e.g., in an ascending or descending order of) the start transmission time (s) of TB (s) scheduled by DCI #C on the same scheduled cell and then according to (e.g., in an ascending or descending order of) the cell indexes of the scheduled cells. For example, the blocks can be placed firstly according to (e.g., in an ascending or descending order of) the cell indexes of the scheduled cells at the same TB start transmission time and then according to (e.g., in an ascending or descending order of) the start transmission time (s) of scheduled TB (s) .
[0123] Each block may include 0, 1 or 2 bits, which is determined, for example, by a high layer parameter configured for the cell corresponding to the block. Specifically, the RV field in DCI #C may include N′max blocks for the cells scheduled by DCI #C, each block may include K″i bits, wherein K″i is the number of bits configured by a high layer parameter for the cell where TB i is scheduled. In that sense, the RV field may include bits. In some cases, there may be one or more blocks with padding bits placed at the end of the RV field if the total number of actually scheduled TBs by the DCI is smaller than the maximum number of schedulable TBs by the DCI. For these cases, in some embodiments, a predefined bit size (e.g., 1 bit) is assumed for each un-scheduled block. In some other embodiments, if the total number of actually scheduled TBs by the DCI is smaller than the maximum number of schedulable TBs by the DCI, one or multiple padding bits are placed at the end of the DCI until the total payload size after padding is equal to the determined payload size of the DCI format.
[0124] FIG. 3B shows an example of the NDI field and RV field for DCI #C. It is assumed that DCI #C indicates a maximum of 12 schedulable TBs. The NDI field and RV field in the DCI may include 12 blocks, i.e., including at least blocks 381-383 for the NDI field and at least blocks 391-393 for the RV field. Each of 12 blocks in the NDI field or RV field may correspond to one schedulable TB. In some examples, the 12 blocks may be placed firstly according to an ascending order of the start transmission time of scheduled TB or data channel on the same cell and then according to an ascending order of the serving cell index of the scheduled cell. Each block in the NDI field may include 1 bit. Each block in the RV field may include 0, 1 or 2 bits.
[0125] It is further assumed that the number of TBs actually scheduled by DCI #C is 8 according to, for example, the TDRA indication. Then, the first 8 blocks of the NDI field may include 8 NDI bits placed at the beginning of the NDI field while the last 4 blocks of the NDI field may include 4 padding bits placed at the end of the NDI field. Similarly, the last 4 blocks of the RV field may include 4 padding bits placed at the end of the RV field.
[0126] In some embodiments, the payload size of DCI #C may be determined based on the configuration of the corresponding active bandwidth part (s) of the scheduled cells in the entry which results in the largest size among all the entries of the cell combination list, considering, for example, Mmax NDI blocks and Mmax RV blocks for each scheduled cell combination. Mmax may be the maximum value in the set of maximum numbers of schedulable TBs per DCI (e.g., 16 in {4, 8, 12, 16} ) . Or in the case of a set of maximum numbers of schedulable data channels per DCI is configured, Mmax can be determined based on the maximum value in the set of maximum numbers. Here, the cell combinations in the cell combination list may not include the maximum number of schedulable TBs of each scheduled cell as in Table 1. For example, for each scheduled cell combination in the cell combination list, a corresponding DCI payload size can be determined. Determining the corresponding DCI payload size may include determining the sizes of various fields in the DCI, including for example, determining the size of the FDRA field based on the configuration of the corresponding active bandwidth part (s) of the scheduled cells in the scheduled cell combination, determining the size of the NDI field based on Mmax NDI blocks and determining the size of the RV fields based on Mmax RV blocks. The final DCI payload size can be determined based on the largest one among all the determined DCI payload sizes.
[0127] In some embodiments, DCI #C may schedule downlink data channel (s) (e.g., PDSCH (s) ) . A UE may transmit HARQ-ACK information bit (s) for the downlink channel (s) (also referred to as HARQ-ACK information bit (s) corresponding to the DCI) . In some embodiments, the number of the HARQ-ACK information bits may be based on the maximum value in the set of maximum numbers of schedulable TBs or data channels per DCI.
[0128] For example, the UE may transmit, to the BS, the HARQ-ACK information bit (s) corresponding to DCI #C in a Type-2 HARQ-ACK codebook. The codebook may include a sub-codebook including HARQ-ACK information bits for each multi-cell multi-channel scheduling DCI that schedules more than one PDSCH (e.g., when spatial domain bundling is not configured for the cell set or time domain bundling is not configured for any cell of the cell set) . The number of HARQ-ACK information bits for such a DCI may be determined based on the maximum value among all sets of maximum numbers of schedulable TBs or data channels by a DCI in the PUCCH group for the UE.
[0129] For example, assuming that the maximum value among the set of maximum numbers of schedulable TBs per a single DCI #C is 16. If the time domain bundling or spatial domain bundling is not configured, for each DCI #C that schedules more than one PDSCH, 12 HARQ-ACK information bits may be generated with each bit corresponding to either one scheduled TB or a necessary padding bit (e.g., NACK bit) . In some examples, different cell sets for multi-cell scheduling and different sets of maximum schedulable TB numbers may be configured. For example, the maximum value in another maximum number set is 20, when HARQ-ACK information bits for DCIs associated with the different cell sets corresponding to the different sets of maximum schedulable TB numbers are to be transmitted in the same PUCCH, 20 HARQ-ACK information bits may be generated for each of these DCIs.
[0130] FIG. 4 illustrates a flowchart of method 400 for wireless communication in accordance with some embodiments of the present disclosure. Details described in all of the foregoing embodiments of the present disclosure are applicable for the embodiments shown in FIG. 4. In some examples, method 400 may be performed by a UE. In some embodiments, the UE may execute a set of instructions to control the functional elements of the UE to perform the described functions or operations. In some examples, a processor of the UE may cause the UE to perform method 400.
[0131] At 411, a UE may receive a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels. At 413, the UE may determine a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI. At 415, the UE may receive or transmit the set of data channels on the first set of cells based on the DCI.
[0132] In some embodiments, the UE may receive a list of cell combinations associated with the second set of cells, and the list of cell combinations includes at least one entry, each of which indicates one or more cells of the second set of cells and a maximum number of schedulable TBs or data channels on each of the one or more cells. In some embodiments, the maximum number of TBs schedulable by the DCI is determined based on a first entry indicated by the DCI from the at least one entry, and the first set of cells is indicated by the first entry.
[0133] In some embodiments, the UE may determine a size of an NDI field in the DCI based on the determined maximum number of TBs schedulable by the DCI.
[0134] In some embodiments, the NDI field includes a set of blocks, and each block of the set of blocks corresponds to a cell scheduled by the DCI among the first set of cells and includes a set of sub-blocks with each corresponding to a schedulable TB on a corresponding scheduled cell.
[0135] In some embodiments, the UE may determine a size of an RV field in the DCI based on the determined maximum number of TBs schedulable by the DCI.
[0136] In some embodiments, the RV field includes a set of blocks, and each block of the set of blocks corresponds to a cell scheduled by the DCI among the first set of cells and includes a set of sub-blocks with each corresponding to a schedulable TB on a corresponding scheduled cell.
[0137] In some embodiments, the set of blocks is ordered according to cell index (es) of the first set of cells. In some embodiments, the set of sub-blocks is ordered according to start transmission time (s) of TB (s) scheduled by the DCI on the corresponding scheduled cell.
[0138] In some embodiments, the set of data channels are downlink channels and the UE may transmit HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on a maximum value of maximum numbers of TBs or data channels schedulable by the DCI among all entries in the list of cell combinations.
[0139] In some embodiments, the UE may receive the high layer signaling for configuring the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI.
[0140] In some embodiments, the indicator in the DCI indicates the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI from a set of values.
[0141] In some embodiments, the NDI field includes a set of blocks, each of which corresponds to a TB schedulable by the DCI.
[0142] In some embodiments, the RV field includes a set of blocks, each of which corresponds to a TB schedulable by the DCI.
[0143] In some embodiments, the set of blocks is ordered in a time-first frequency-second manner or a frequency-first time-second manner.
[0144] In some embodiments, the set of data channels are downlink channels and the UE may transmit HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on the maximum number of TBs schedulable by the DCI or the maximum number of data channels schedulable by the DCI.
[0145] In some embodiments, the set of data channels are downlink channels and the UE may transmit HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on a maximum value in the set of values.
[0146] It should be appreciated by persons skilled in the art that the sequence of the operations in exemplary method 400 may be changed and some of the operations in exemplary method 400 may be eliminated or modified, without departing from the spirit and scope of the disclosure.
[0147] FIG. 5 illustrates a flowchart of method 500 for wireless communication in accordance with some embodiments of the present disclosure. Details described in all of the foregoing embodiments of the present disclosure are applicable for the embodiments shown in FIG. 5. In some examples, method 500 may be performed by a BS. In some embodiments, the BS may execute a set of instructions to control the functional elements of the BS to perform the described functions or operations. In some examples, a processor of the BS may cause the BS to perform method 500.
[0148] At 511, a BS may transmit, to a UE, a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels. At 513, the BS may determine a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI. At 515, the BS may transmit to the UE or receive from the UE the set of data channels on the first set of cells based on the DCI.
[0149] In some embodiments, the BS may transmit, to the UE, a list of cell combinations associated with the second set of cells, and the list of cell combinations includes at least one entry, each of which indicates one or more cells of the second set of cells and a maximum number of schedulable TBs or data channels on each of the one or more cells. In some embodiments, the maximum number of TBs schedulable by the DCI is determined based on a first entry indicated by the DCI from the at least one entry, and the first set of cells is indicated by the first entry.
[0150] In some embodiments, the DCI includes an NDI field having a size based on the determined maximum number of TBs schedulable by the DCI.
[0151] In some embodiments, the NDI field includes a set of blocks, and each block of the set of blocks corresponds to a cell scheduled by the DCI among the first set of cells and includes a set of sub-blocks with each corresponding to a schedulable TB on a corresponding scheduled cell.
[0152] In some embodiments, the DCI includes an RV field having a size based on the determined maximum number of TBs schedulable by the DCI.
[0153] In some embodiments, the RV field includes a set of blocks, and each block of the set of blocks corresponds to a cell scheduled by the DCI among the first set of cells and includes a set of sub-blocks with each corresponding to a schedulable TB on a corresponding scheduled cell.
[0154] In some embodiments, the set of blocks is ordered according to cell index (es) of the first set of cells. In some embodiments, the set of sub-blocks is ordered according to start transmission time (s) of TB (s) scheduled by the DCI on the corresponding scheduled cell.
[0155] In some embodiments, the set of data channels are downlink channels and the BS may receive, from the UE, HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on a maximum value of maximum numbers of TBs or data channels schedulable by the DCI among all entries in the list of cell combinations.
[0156] In some embodiments, the BS may transmit, to the UE, the high layer signaling for configuring the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI.
[0157] In some embodiments, the indicator in the DCI indicates the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI from a set of values.
[0158] In some embodiments, the NDI field includes a set of blocks, each of which corresponds to a TB schedulable by the DCI.
[0159] In some embodiments, the RV field includes a set of blocks, each of which corresponds to a TB schedulable by the DCI.
[0160] In some embodiments, the set of blocks is ordered in a time-first frequency-second manner or a frequency-first time-second manner.
[0161] In some embodiments, the set of data channels are downlink channels and the BS may receive, from the UE, HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on the maximum number of TBs schedulable by the DCI or the maximum number of data channels schedulable by the DCI.
[0162] In some embodiments, the set of data channels are downlink channels and the BS may receive, from the UE, HARQ-ACK information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on a maximum value in the set of values.
[0163] It should be appreciated by persons skilled in the art that the sequence of the operations in exemplary method 500 may be changed and some of the operations in exemplary method 500 may be eliminated or modified, without departing from the spirit and scope of the disclosure.
[0164] FIG. 6 illustrates an example of a UE 600 in accordance with aspects of the present disclosure. The UE 600 may include a processor 602, a memory 604, a controller 606, and a transceiver 608. The processor 602, the memory 604, the controller 606, or the transceiver 608, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.
[0165] The processor 602, the memory 604, the controller 606, or the transceiver 608, or various combinations or components thereof may be implemented in hardware (e.g., circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , or other programmable logic device, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.
[0166] The processor 602 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof) . In some implementations, the processor 602 may be configured to operate the memory 604. In some other implementations, the memory 604 may be integrated into the processor 602. The processor 602 may be configured to execute computer-readable instructions stored in the memory 604 to cause the UE 600 to perform various functions of the present disclosure.
[0167] The memory 604 may include volatile or non-volatile memory. The memory 604 may store computer-readable, computer-executable code including instructions when executed by the processor 602 cause the UE 600 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as the memory 604 or another type of memory. Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
[0168] In some implementations, the processor 602 and the memory 604 coupled with the processor 602 may be configured to cause the UE 600 to perform one or more of the functions described herein (e.g., executing, by the processor 602, instructions stored in the memory 604) . For example, the processor 602 may support wireless communication at the UE 600 in accordance with examples as disclosed herein. For example, the UE 600 may be configured to support means for performing the operations as described with respect to FIGS. 1-5.
[0169] For example, the UE 600 may be configured to support: a means for receiving a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels; a means for determining a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; and a means for receiving or transmitting the set of data channels on the first set of cells based on the DCI.
[0170] The controller 606 may manage input and output signals for the UE 600. The controller 606 may also manage peripherals not integrated into the UE 600. In some implementations, the controller 606 may utilize an operating system such as or other operating systems. In some implementations, the controller 606 may be implemented as part of the processor 602.
[0171] In some implementations, the UE 600 may include at least one transceiver 608. In some other implementations, the UE 600 may have more than one transceiver 608. The transceiver 608 may represent a wireless transceiver. The transceiver 608 may include one or more receiver chains 610, one or more transmitter chains 612, or a combination thereof.
[0172] A receiver chain 610 may be configured to receive signals (e.g., control information, data, or packets) over a wireless medium. For example, the receiver chain 610 may include one or more antennas for receive the signal over the air or wireless medium. The receiver chain 610 may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receiver chain 610 may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receiver chain 610 may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.
[0173] A transmitter chain 612 may be configured to generate and transmit signals (e.g., control information, data, or packets) . The transmitter chain 612 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmitter chain 612 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmitter chain 612 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.
[0174] It should be appreciated by persons skilled in the art that the components in exemplary UE 600 may be changed, for example, some of the components in exemplary UE 600 may be omitted or modified or a new component (s) may be added to exemplary UE 600, without departing from the spirit and scope of the disclosure. For example, in some embodiments, the UE 600 may not include the controller 606.
[0175] FIG. 7 illustrates an example of a processor 700 in accordance with aspects of the present disclosure. The processor 700 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 700 may include a controller 702 configured to perform various operations in accordance with examples as described herein. The processor 700 may optionally include at least one memory 704, which may be, for example, an L1 / L2 / L3 cache. Additionally, or alternatively, the processor 700 may optionally include one or more arithmetic-logic units (ALUs) 706. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0176] The processor 700 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 700) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .
[0177] The controller 702 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 700 to cause the processor 700 to support various operations in accordance with examples as described herein. For example, the controller 702 may operate as a control unit of the processor 700, generating control signals that manage the operation of various components of the processor 700. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0178] The controller 702 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 704 and determine a subsequent instruction (s) to be executed to cause the processor 700 to support various operations in accordance with examples as described herein. The controller 702 may be configured to track memory address of instructions associated with the memory 704. The controller 702 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 702 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 700 to cause the processor 700 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 702 may be configured to manage flow of data within the processor 700. The controller 702 may be configured to control transfer of data between registers, ALUs, and other functional units of the processor 700.
[0179] The memory 704 may include one or more caches (e.g., memory local to or included in the processor 700 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementations, the memory 704 may reside within or on a processor chipset (e.g., local to the processor 700) . In some other implementations, the memory 704 may reside external to the processor chipset (e.g., remote to the processor 700) .
[0180] The memory 704 may store computer-readable, computer-executable code including instructions that, when executed by the processor 700, cause the processor 700 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 702 and / or the processor 700 may be configured to execute computer-readable instructions stored in the memory 704 to cause the processor 700 to perform various functions. For example, the processor 700 and / or the controller 702 may be coupled with or to the memory 704, the processor 700, the controller 702, and the memory 704 may be configured to perform various functions described herein. In some examples, the processor 700 may include multiple processors and the memory 704 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
[0181] The one or more ALUs 706 may be configured to support various operations in accordance with examples as described herein. In some implementations, the one or more ALUs 706 may reside within or on a processor chipset (e.g., the processor 700) . In some other implementations, the one or more ALUs 706 may reside external to the processor chipset (e.g., the processor 700) . One or more ALUs 706 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 706 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 706 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 706 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 706 to handle conditional operations, comparisons, and bitwise operations.
[0182] The processor 700 may support wireless communication in accordance with examples as disclosed herein. For example, the processor 700 may be configured to support means for performing the operations as described with respect to FIGs. 1-5.
[0183] For example, the processor 700 may be configured to or operable to support: a means for receiving a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels; a means for determining a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; and a means for receiving or transmitting the set of data channels on the first set of cells based on the DCI.
[0184] For example, the processor 700 may be configured to or operable to support: a means for transmitting, to a UE, a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels; a means for determining a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; and a means for transmitting to the UE or receiving from the UE the set of data channels on the first set of cells based on the DCI.
[0185] It should be appreciated by persons skilled in the art that the components in exemplary processor 700 may be changed, for example, some of the components in exemplary processor 700 may be omitted or modified or a new component (s) may be added to exemplary processor 700, without departing from the spirit and scope of the disclosure. For example, in some embodiments, the processor 700 may not include the ALUs 706.
[0186] FIG. 8 illustrates an example of an NE 800 in accordance with aspects of the present disclosure. The NE 800 may include a processor 802, a memory 804, a controller 806, and a transceiver 808. The processor 802, the memory 804, the controller 806, or the transceiver 808, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.
[0187] The processor 802, the memory 804, the controller 806, or the transceiver 808, or various combinations or components thereof may be implemented in hardware (e.g., circuitry) . The hardware may include a processor, a DSP, an ASIC, or other programmable logic device, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.
[0188] The processor 802 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof) . In some implementations, the processor 802 may be configured to operate the memory 804. In some other implementations, the memory 804 may be integrated into the processor 802. The processor 802 may be configured to execute computer-readable instructions stored in the memory 804 to cause the NE 800 to perform various functions of the present disclosure.
[0189] The memory 804 may include volatile or non-volatile memory. The memory 804 may store computer-readable, computer-executable code including instructions when executed by the processor 802 cause the NE 800 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as the memory 804 or another type of memory. Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
[0190] In some implementations, the processor 802 and the memory 804 coupled with the processor 802 may be configured to cause the NE 800 to perform one or more of the functions described herein (e.g., executing, by the processor 802, instructions stored in the memory 804) . For example, the processor 802 may support wireless communication at the NE 800 in accordance with examples as disclosed herein. For example, the NE 800 may be configured to support means for performing the operations as described with respect to FIGs. 1-5.
[0191] For example, the NE 800 may be configured to support: a means for transmitting, to a UE, a DCI scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels; a means for determining a maximum number of TBs schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; and a means for transmitting to the UE or receiving from the UE the set of data channels on the first set of cells based on the DCI.
[0192] The controller 806 may manage input and output signals for the NE 800. The controller 806 may also manage peripherals not integrated into the NE 800. In some implementations, the controller 806 may utilize an operating system such as or other operating systems. In some implementations, the controller 806 may be implemented as part of the processor 802.
[0193] In some implementations, the NE 800 may include at least one transceiver 808. In some other implementations, the NE 800 may have more than one transceiver 808. The transceiver 808 may represent a wireless transceiver. The transceiver 808 may include one or more receiver chains 810, one or more transmitter chains 812, or a combination thereof.
[0194] A receiver chain 810 may be configured to receive signals (e.g., control information, data, or packets) over a wireless medium. For example, the receiver chain 810 may include one or more antennas for receive the signal over the air or wireless medium. The receiver chain 810 may include at least one amplifier (e.g., an LNA) configured to amplify the received signal. The receiver chain 810 may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receiver chain 810 may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.
[0195] A transmitter chain 812 may be configured to generate and transmit signals (e.g., control information, data, or packets) . The transmitter chain 812 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as AM, FM, or digital modulation schemes like PSK or QAM. The transmitter chain 812 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmitter chain 812 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.
[0196] It should be appreciated by persons skilled in the art that the components in exemplary NE 800 may be changed, for example, some of the components in exemplary NE 800 may be omitted or modified or a new component (s) may be added to exemplary NE 800, without departing from the spirit and scope of the disclosure. For example, in some embodiments, the NE 800 may not include the controller 806.
[0197] Those having ordinary skill in the art would understand that the operations or steps of the methods described in connection with the aspects disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. Additionally, in some aspects, the operations or steps of 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.
[0198] While this disclosure has been described with specific embodiments thereof, it is evident that many alternatives, modifications, and variations may be apparent to those skilled in the art. The disclosure is not limited to the examples and designs described herein but is to be accorded with the broadest scope consistent with the principles and novel features disclosed herein. For example, various components of the embodiments may be interchanged, added, or substituted in other embodiments. Also, all of the elements of each figure are not necessary for the operation of the disclosed embodiments. For example, one of ordinary skill in the art of the disclosed embodiments would be enabled to make and use the teachings of the disclosure by simply employing the elements of the independent claims. Accordingly, embodiments of the disclosure as set forth herein are intended to be illustrative, not limiting. Various changes may be made without departing from the spirit and scope of the disclosure.
[0199] In this document, the terms "DCI" and "DCI format" may be used interchangeably. The terms "includes, " "including, " or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "a, " "an, " or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element. Also, the term "another" is defined as at least a second or more. The term "having" or the like, as used herein, is defined as "including. " Expressions such as "A and / or B" or "at least one of A and B" may include any and all combinations of words enumerated along with the expression. For instance, the expression "A and / or B" or "at least one of A and B" may include A, B, or both A and B. The wording "the first, " "the second" or the like is only used to clearly illustrate the embodiments of the present disclosure, but is not used to limit the substance of the present disclosure.
Claims
1.A user equipment (UE) , comprising:at least one memory; andat least one processor coupled with the at least one memory and configured to cause the UE to:receive downlink control information (DCI) scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels;determine a maximum number of transport blocks (TBs) schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; andreceive or transmit the set of data channels on the first set of cells based on the DCI.2.The UE of claim 1, wherein the at least one processor is configured to cause the UE to receive a list of cell combinations associated with the second set of cells, and the list of cell combinations comprises at least one entry, each of which indicates one or more cells of the second set of cells and a maximum number of schedulable TBs or data channels on each of the one or more cells; andwherein the maximum number of TBs schedulable by the DCI is determined based on a first entry indicated by the DCI from the at least one entry, and the first set of cells is indicated by the first entry.3.The UE of claim 1, wherein the at least one processor is configured to cause the UE to determine a size of a new data indicator (NDI) field in the DCI based on the determined maximum number of TBs schedulable by the DCI.4.The UE of claim 3, wherein the NDI field comprises a set of blocks, and each block of the set of blocks corresponds to a cell scheduled by the DCI among the first set of cells and comprises a set of sub-blocks with each corresponding to a schedulable TB on a corresponding scheduled cell.5.The UE of claim 1, wherein the at least one processor is configured to cause the UE to determine a size of a redundancy version (RV) field in the DCI based on the determined maximum number of TBs schedulable by the DCI.6.The UE of claim 5, wherein the RV field comprises a set of blocks, and each block of the set of blocks corresponds to a cell scheduled by the DCI among the first set of cells and comprises a set of sub-blocks with each corresponding to a schedulable TB on a corresponding scheduled cell.7.The UE of claim 4 or 6, wherein the set of blocks is ordered according to cell index (es) of the first set of cells; andwherein the set of sub-blocks is ordered according to start transmission time (s) of TB (s) scheduled by the DCI on the corresponding scheduled cell.8.The UE of claim 2, wherein the set of data channels are downlink channels and the at least one processor is configured to cause the UE to:transmit hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on a maximum value of maximum numbers of TBs or data channels schedulable by the DCI among all entries in the list of cell combinations.9.The UE of claim 1, wherein the at least one processor is configured to cause the UE to receive the high layer signaling for configuring the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI.10.The UE of claim 1, wherein the indicator in the DCI indicates the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI from a set of values.11.The UE of claim 3, wherein the NDI field comprises a set of blocks, each of which corresponds to a TB schedulable by the DCI.12.The UE of claim 5, wherein the RV field comprises a set of blocks, each of which corresponds to a TB schedulable by the DCI.13.The UE of claim 11 or 12, wherein the set of blocks is ordered in a time-first frequency-second manner or a frequency-first time-second manner.14.The UE of claim 9, wherein the set of data channels are downlink channels and the at least one processor is configured to cause the UE to:transmit hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on the maximum number of TBs schedulable by the DCI or the maximum number of data channels schedulable by the DCI.15.The UE of claim 10, wherein the set of data channels are downlink channels and the at least one processor is configured to cause the UE to:transmit hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits corresponding to the DCI, wherein a number of the HARQ-ACK information bits is based on a maximum value in the set of values.16.A base station (BS) , comprising:at least one memory; andat least one processor coupled with the at least one memory and configured to cause the BS to:transmit, to a user equipment (UE) , downlink control information (DCI) scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels;determine a maximum number of transport blocks (TBs) schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; andtransmit to the UE or receive from the UE the set of data channels on the first set of cells based on the DCI.17.The BS of claim 16, wherein the at least one processor is configured to cause the BS to transmit, to the UE, a list of cell combinations associated with the second set of cells, and the list of cell combinations comprises at least one entry, each of which indicates one or more cells of the second set of cells and a maximum number of schedulable TBs or data channels on each of the one or more cells; andwherein the maximum number of TBs schedulable by the DCI is determined based on a first entry indicated by the DCI from the at least one entry, and the first set of cells is indicated by the first entry.18.The BS of claim 16, wherein the at least one processor is configured to cause the BS to transmit, to the UE, the high layer signaling for configuring the maximum number of TBs schedulable by the DCI or a maximum number of data channels schedulable by the DCI.19.A processor, comprising:at least one controller coupled with at least one memory and configured to cause the processor to:receive downlink control information (DCI) scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels;determine a maximum number of transport blocks (TBs) schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; andreceive or transmit the set of data channels on the first set of cells based on the DCI.20.A method for wireless communication, comprising:receiving downlink control information (DCI) scheduling a set of data channels on a first set of cells among a second set of cells, wherein each cell of the first set of cells is scheduled with one or more data channels of the set of data channels;determining a maximum number of transport blocks (TBs) schedulable by the DCI based on a maximum number of schedulable TBs on each cell of the first set of cells, high layer signaling, or an indicator in the DCI; andreceiving or transmitting the set of data channels on the first set of cells based on the DCI.
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