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CN-116058046-B - Enhancement of GC-DCI for REDCAP UE spatial multiplexing

CN116058046BCN 116058046 BCN116058046 BCN 116058046BCN-116058046-B

Abstract

A method of providing Downlink Control Information (DCI) to a plurality of User Equipments (UEs) is provided. The method includes assigning each of a plurality of UEs to a group of a set of groups, each group being identified by a group radio network identifier (G-RNTI), and transmitting the G-RNTI, a size of the group, and a location within the group to each of the plurality of UEs. In this way, group common DCI (GC-DCI) may be sent to the group, where the UE may determine whether it has a grant by its assigned position in the group and retrieve the grant from the grant block in the GC-DCI.

Inventors

  • LEI JING
  • XU HUILIN
  • JI TINGFANG

Assignees

  • 高通股份有限公司

Dates

Publication Date
20260508
Application Date
20210730
Priority Date
20210729

Claims (20)

  1. 1. A method of providing downlink control information, DCI, to a plurality of user equipments, UEs, comprising: compiling a group common DCI (GC-DCI) packet including a group radio network identifier, G-RNTI, indicating an assigned group, a grant for a selected UE that is a member of the assigned group, and an indication for the UEs in the group as to whether the grant is included for the UE, and Transmitting the group common DCI (GC-DCI) packet to a particular group, the group common DCI (GC-DCI) packet having a grant for a selected one of the UEs assigned to the particular group, Wherein the UEs in the particular group identify the group based on the G-RNTI, determine whether the UEs have grants included in the group common DCI (GC-DCI) based on the indication, and recover the grants from the group common DCI (GC-DCI) based on the location of the UEs in the particular group, Wherein compiling the set of common DCI (GC-DCI) packets comprises: Determining a grant for a set of UEs in the group associated with a particular G-RNTI; Setting the indication by setting respective bits in a group bitmap, the group bitmap comprising K bits, wherein K is the size of the group, and wherein a location for each UE in the set of UEs is activated in the group bitmap, and Constructing the group common DCI (GC-DCI) packet including a DL/UL flag, a grant bitmap, a grant block including grants for each UE in the UE set in order of the position of the UE, and a block including CRC masked with the G-RNTI, and Wherein the group common DCI (GC-DCI) packet includes a grant end EOG flag and the method further includes determining that a number of grants is too large and, if so, partitioning the grants, wherein constructing the group common DCI (GC-DCI) packet includes constructing a sequence of group common DCI (GC-DCI) packets to be transmitted, wherein a last group common DCI (GC-DCI) packet has the EOG flag not activated to indicate no further grants.
  2. 2. The method of claim 1, further comprising assigning each of the plurality of UEs to one of a set of groups, each group being identified by the G-RNTI, wherein assigning each of the plurality of UEs to one of the set of groups comprises implementing criteria for grouping including consideration of one or more factors from the set consisting of UL/DL traffic pattern, transport block size for PDSCH/PUSCH transmissions, DL/UL coverage, transmission configuration indicator TCI status, transmission receive beams.
  3. 3. The method of claim 1, further comprising transmitting to each of the plurality of UEs the G-RNTI comprising the particular group of the UE, a position of the UE in the particular group, and a size of the particular group, wherein transmitting to each UE comprises, for each of the plurality of UEs, Assembling a message packet including said G-RNTI, said size of said group and said location within said group, and The message packet is sent to the UE through dedicated radio resource control, RRC, signaling.
  4. 4. The method of claim 1, wherein the grant indicates one or more of a demodulation reference signal, DMRS, resource assignment, a power control command, and a PUCCH resource indicator.
  5. 5. The method of claim 4, wherein the DMRS resource assignment, the power control command, and/or the PUCCH resource indicator are ordered within the group.
  6. 6. The method of claim 5, wherein the DMRS resource assignments are ordered first by orthogonal antenna ports and then by an order of scrambling IDs assigned to the DMRS resources.
  7. 7. The method of claim 5, wherein the DMRS resource assignment, the power control command, and/or the PUCCH resource indicator are explicitly indicated in the grant for each UE.
  8. 8. The method of claim 5, wherein the DMRS resource assignment, the power control command, and/or the PUCCH resource indicator are implicit in the position of the grant in the grant block.
  9. 9. The method of claim 1, further comprising: for each UL grant in the grant block, receiving an ACK or NACK according to an associated PUCCH resource indicator, and For each DL grant in the grant block, a spatially multiplexed PUSCH transmission is received according to an associated power control command in the grant.
  10. 10. The method of claim 4, wherein the PUCCH resource indicator and the power control command in the grant are explicit within the grant.
  11. 11. The method of claim 4, wherein the PUCCH resource indicator and the power control command in the grant are implicitly in a position of the grant in the grant block.
  12. 12. A method of receiving downlink control information, DCI, from a base station, BS, into a user equipment, UE, comprising: Receiving a group common DCI (GC-DCI) packet from the BS, the group common DCI (GC-DCI) packet including a group radio network identifier, G-RNTI, indicating an assigned group, a grant for a selected UE that is a member of the assigned group, and an indication for a UE in the group as to whether the grant is included for the UE; Determining, based on the G-RNTI, that the group common DCI (GC-DCI) packet points to the assigned group including the UE; Determining, from the indication in the group common DCI (GC-DCI) packet, whether the UE has a grant included in the group common DCI (GC-DCI) packet; if the UE has a grant included in the group common DCI (GC-DCI) packet, the grant is received according to a location of the UE in the assigned group, Wherein receiving a group common DCI (GC-DCI) packet from the BS includes receiving the group common DCI (GC-DCI) packet from the BS through dedicated radio resource control RRC signaling, Wherein receiving the grant comprises: Determining a position of the grant in a grant block of the group common DCI (GC-DCI) packet based on a number of activation bits in a grant bitmap preceding the position in the assigned group, and Recovering the grant from the location of the grant in the grant block, and Wherein recovering the grant comprises: determining whether the location of the grant occurs in the group common DCI (GC-DCI) packet, and If not, it is determined whether a grant end flag is set, and if so, a next set of common DCI (GC-DCI) packets is received.
  13. 13. The method of claim 12, wherein determining that the group common DCI (GC-DCI) packet points to the assigned group comprises: retrieving a group identifier from the group common DCI (GC-DCI) packet, and Determining that the group identifier is the G-RNTI of the assigned group.
  14. 14. The method of claim 12, wherein determining whether the UE has a grant included in the set of common DCI (GC-DCI) packets comprises: retrieving a grant bitmap from the set of common DCI (GC-DCI) packets; Retrieving bits of the grant bitmap in the locations in the assigned group, and If the bit is activated, it is determined to include the grant.
  15. 15. The method of claim 12, wherein the grant indicates one or more of a demodulation reference signal, DMRS, resource assignment, a power control command, and/or a PUCCH resource indicator.
  16. 16. The method of claim 15, wherein the demodulation reference signal, DMRS, resource assignment, the power control command, and/or the PUCCH resource indicator are explicit in the grant.
  17. 17. The method of claim 15, wherein the position of the grant in the grant implicitly indicates the demodulation reference signal, DMRS, resource assignment, the power control command, and/or the PUCCH resource indicator in the grant.
  18. 18. The method according to claim 15, wherein: If the grant is a DL grant, Power control is applied to PUCCH transmissions in accordance with the power control command associated with the grant, Transmitting an ACK or NACK according to an associated PUCCH resource indicator associated with the grant, an Decoding spatially multiplexed PDSCH transmissions according to an associated DMRS resource allocation associated with the grant, and If the grant is a UL grant, Applying power control to spatially multiplexed PUSCH transmissions in accordance with the power control command associated with the grant, and The spatially multiplexed PUSCH is sent according to the DMRS resource assignment associated with the grant.
  19. 19. A base station BS, comprising: a transceiver; a communication module coupled to the transceiver to receive communications and transmit communications to a plurality of user equipments, UEs, and A processor coupled to the transceiver and the communication module, the processor executing instructions to: compiling a group common downlink control information, DCI, (GC-DCI) packet including a group radio network identifier, G-RNTI, indicating an assigned group, a grant for a selected UE being a member of the assigned group, and an indication for the UEs in the group as to whether the grant is included for the UE, and Transmitting the group common DCI (GC-DCI) packet to a particular group, the group common DCI (GC-DCI) packet having a grant for a selected one of the UEs assigned to the particular group, Wherein the UEs in the particular group identify the group based on the G-RNTI, determine whether the UEs have grants included in the group common DCI (GC-DCI) based on the indication, and recover the grants from the group common DCI (GC-DCI) based on the location of the UEs in the particular group, Wherein the instructions for compiling the set of common DCI (GC-DCI) packets include instructions for: Determining a grant for a set of UEs in the group associated with a particular G-RNTI; Setting the indication by setting respective bits in a group bitmap, the group bitmap comprising K bits, wherein K is the size of the group, and wherein a location for each UE in the set of UEs is activated in the group bitmap, and Constructing the group common DCI (GC-DCI) packet including a DL/UL flag, a grant bitmap, a grant block including grants for each UE in the UE set in order of the position of the UE, and a block including CRC masked with the G-RNTI, and Wherein the group common DCI (GC-DCI) packet includes a grant end EOG flag and the instructions further include instructions for determining that a number of grants is too large and, if so, partitioning the grants, wherein the instructions for constructing the group common DCI (GC-DCI) packet includes instructions for constructing a sequence of group common DCI (GC-DCI) packets to be transmitted, wherein a last group common DCI (GC-DCI) packet has the EOG flag that is not activated to indicate no further grants.
  20. 20. A user equipment device, comprising: a transceiver; a communication module coupled to the transceiver for receiving and transmitting communications to the base station BS, and A processor coupled to the transceiver and the communication module, the processor executing instructions to: Receiving a group common downlink control information, DCI, (GC-DCI) packet from the BS, the group common DCI (GC-DCI) packet including a group radio network identifier, G-RNTI, indicating an assigned group, a grant for a selected UE that is a member of the assigned group, and an indication for UEs in the group as to whether the grant is included for the UE; Determining, based on the G-RNTI, that the group common DCI (GC-DCI) packet points to the assigned group including the UE; Determining whether the UE has a grant included in the group common DCI (GC-DCI) packet according to the indication in the group common DCI (GC-DCI) packet, and If a grant is included in the group common DCI (GC-DCI) packet, the grant is received according to a location of the UE in the assigned group, Wherein the instructions for receiving a group common DCI (GC-DCI) packet from the BS include instructions for receiving the group common DCI (GC-DCI) packet from the BS through dedicated radio resource control RRC signaling, Wherein the instructions for receiving the grant comprise instructions for: Determining a position of the grant in a grant block of the group common DCI (GC-DCI) packet based on a number of activation bits in a grant bitmap preceding the position in the assigned group, and Recovering the grant from the location of the grant in the grant block, and wherein the instructions for recovering the grant include instructions for: determining whether the location of the grant occurs in the group common DCI (GC-DCI) packet, and If not, it is determined whether a grant end flag is set, and if so, a next set of common DCI (GC-DCI) packets is received.

Description

Enhancement of GC-DCI for REDCAP UE spatial multiplexing Technical Field The present application relates to wireless communication systems, and more particularly, to spatially multiplexed Group Common (GC) Downlink Control Information (DCI) for User Equipment (UE) of reduced capacity (REDCAP). Background Wireless communication systems are widely deployed to provide various types of communication content such as voice, video, packet data, messaging, broadcast, and so on. These systems are able to support communication with multiple users by sharing available system resources (e.g., time, frequency, and power). A wireless multiple-access communication system may include multiple Base Stations (BSs), each supporting communication for multiple communication devices, which may be otherwise referred to as User Equipment (UE), simultaneously. To meet the increasing demand for extended mobile broadband connectivity, wireless communication technologies are evolving from Long Term Evolution (LTE) technology to next generation New Radio (NR) technology, which may be referred to as 5 th generation (5G). For example, NR is designed to provide lower latency, higher bandwidth or higher throughput, and higher reliability than LTE. NR is designed to operate over a wide variety of spectral bands (e.g., from a low frequency band below about 1 gigahertz (GHz) and a mid-frequency band from about 1GHz to about 6GHz, to a high frequency band such as a millimeter wave (mm wave) frequency band). NR is also designed to operate across different spectrum types, from licensed spectrum to unlicensed spectrum and shared spectrum. Spectrum sharing enables operators to opportunistically aggregate spectrum to dynamically support high bandwidth services. Spectrum sharing may extend the benefits of NR technology to operational entities that may not be able to access licensed spectrum. The 5G standard allows for the complexity of resource allocation for communications between network components. The resources include time domain, frequency domain, modulation scheme, and other details of physical communication. In particular, the BS may provide resource scheduling for each UE coupled thereto through Downlink Control Indicator (DCI) signaling transmitted from the BS, which may manage both downlink and uplink resource scheduling. However, UEs included in the network proliferate. Furthermore, many of these UEs may have limited capabilities (i.e., reduced capabilities) for communication. Such UEs include, for example, sensor devices or simple control systems attached to various devices. The resources required to schedule the resources for each of these devices can be large. Thus, there is a need for better resource allocation for a large number of UEs coupled to a limited capability of the network. Disclosure of Invention The following outlines some aspects of the disclosure to provide a basic understanding of the techniques discussed. This summary is not an extensive overview of all contemplated features of the disclosure, and is intended to neither identify key or critical elements of all aspects of the disclosure nor delineate the scope of any or all aspects of the disclosure. Its sole purpose is to present some concepts of one or more aspects of the disclosure in a summarized form as a prelude to the more detailed description that is presented later. In some aspects, a method of providing Downlink Control Information (DCI) to a plurality of User Equipments (UEs) includes assigning each of the plurality of UEs to one of a set of groups, each group being identified by a group radio network identifier (G-RNTI), transmitting the G-RNTI, a size of the group, and a location within the group to each of the plurality of UEs, and transmitting a group common DCI (GC-DCI) packet to a particular group, the GC-DCI packet having a grant for a selected one of the UEs assigned to the particular group. In some aspects, a method of receiving Downlink Control Information (DCI) from a Base Station (BS) includes receiving a message packet from the BS, the message packet including a group radio network identifier (G-RNTI) indicating an assigned group, a size of the assigned group, and a location in the assigned group, receiving a group common DCI (GC-DCI) packet, determining that the GC-DCI packet points to the group indicated by the G-RNTI, determining whether a grant is included based on the location in the assigned group, and receiving the grant if the grant is included. A Base Station (BS) according to some aspects includes a transceiver, a communication module coupled to the transceiver to receive communications and to transmit communications to a plurality of User Equipments (UEs), and a processor coupled to the transceiver and the communication module to execute instructions to assign each UE of the plurality of UEs to one of a set of groups, each group identified by a group radio network identifier (G-RNTI), transmit the G-RNTI, a size of the group, and a lo