Search

CN-122029880-A - Delayed status report enhancement

CN122029880ACN 122029880 ACN122029880 ACN 122029880ACN-122029880-A

Abstract

The present disclosure provides systems, apparatus, devices, and methods, including computer programs encoded on a storage medium, for delayed status report enhancement. The UE (102) receives (410) from the network entity (104) a configuration of the DSR for data in the logical channel buffer. The configuration indicates a first time remaining threshold that triggers DSR. The UE (102) transmits (416) the DSR to the network entity (104) when a first remaining delay time from discarding of data in the logical channel buffer of the first logical channel is less than a first remaining time threshold. DSR indicates a first remaining delay time of a first logical channel and a second remaining delay time of a second logical channel.

Inventors

  • Abdullatif Salah
  • WU ZHIXIANG

Assignees

  • 谷歌有限责任公司

Dates

Publication Date
20260512
Application Date
20240927
Priority Date
20230929

Claims (18)

  1. 1.A method of wireless communication at a user equipment, UE, (102), comprising: Receiving (410) from a network entity (104) a configuration of a delay status report, DSR, for data in a logical channel buffer, the configuration indicating a first time remaining threshold for triggering the DSR, and Transmitting (416) the DSR to the network entity (104) when a first remaining delay time from discarding of the data in the logical channel buffer of a first logical channel is less than the first remaining time threshold, the DSR indicating the first remaining delay time of the first logical channel and a second remaining delay time of a second logical channel.
  2. 2. The method of claim 1, wherein the first logical channel is included in a first logical channel group, LCG, and the second logical channel is included in a second LCG.
  3. 3. The method of claim 2, wherein the configuration indicates the first time remaining threshold for the first logical channel for the first LCG and a second time remaining threshold for the second logical channel for the second LCG, the first time remaining threshold being different from the second time remaining threshold, wherein the second time remaining delay time for the second logical channel is less than the second time remaining threshold.
  4. 4. The method of claim 2, wherein the configuration indicates the first time remaining threshold for the first logical channel for the first LCG and a second time remaining threshold for the second logical channel for the second LCG, the first time remaining threshold being different from the second time remaining threshold, wherein the second time remaining delay time for the second logical channel is not less than the second time remaining threshold.
  5. 5. The method of claim 2, wherein the configuration indicates the first time remaining threshold for the first logical channel for the first LCG and a second time remaining threshold for the second logical channel for the second LCG, wherein the first time remaining threshold and the second time remaining threshold are the same, wherein the second time remaining delay time for the second logical channel is less than the second time remaining threshold.
  6. 6. The method of claim 2, wherein the configuration indicates the first time remaining threshold for the first logical channel for the first LCG and a second time remaining threshold for the second logical channel for the second LCG, wherein the first time remaining threshold and the second time remaining threshold are the same, wherein the second time remaining delay time for the second logical channel is not less than the second time remaining threshold.
  7. 7. The method of any one of claims 1 to 6, further comprising: The data in the logical channel buffer is received as a protocol data unit, PDU, set comprising PDUs in the PDU set having a shortest remaining delay time, the first remaining delay time indicated in the DSR being equal to the shortest remaining delay time of the PDUs in the PDU set.
  8. 8. The method of any of claims 1-7 wherein the DSR indicates the first remaining delay time using an index of at least one of: the first time proportion of the packet data convergence protocol PDCP discard timer, A second time proportion of the first remaining time threshold triggering the DSR, or A time interval of a maximum value of the first remaining delay time.
  9. 9. The method of any of claims 2-8 wherein the DSR indicates: The first remaining delay time of the first logical channel in the first LCG and the second remaining delay time of the second logical channel in the second LCG based on the number of bits in the bit field, A buffer size corresponding to an amount of data associated with each of the first remaining delay time and the second remaining delay time based on a capacity of the data in the logical channel buffers of the first logical channel and the second logical channel, and LCG identifiers ID of the first LCG and the second LCG.
  10. 10. The method of any one of claims 1 to 9, further comprising: -receiving (420) downlink control information, DCI, from the network entity (104), the DCI scheduling uplink transmission of the data in the logical channel buffers of the first logical channel during the first remaining delay time and the second logical channel during the second remaining delay time.
  11. 11. The method of claim 10, further comprising: The DSR is cancelled when the scheduled uplink transmission includes all of the data in the logical channel buffer associated with the DSR.
  12. 12. The method of any one of claims 1 to 11, further comprising: A radio resource control, RRC, reconfiguration message is received from the network entity, the DSR being cancelled based on receipt of the RRC reconfiguration message.
  13. 13. A method of wireless communication at a network entity (104), comprising: Transmitting (410) to the user equipment, UE, (102) a configuration of a delay status report, DSR, for data in a logical channel buffer, the configuration indicating a first remaining time threshold at which the DSR is triggered, and The DSR is received (416) from the UE (102) when a first remaining delay time from discarding of the data in the logical channel buffer of a first logical channel is less than the first remaining time threshold, the DSR indicating the first remaining delay time of the first logical channel and a second remaining delay time of a second logical channel.
  14. 14. The method of claim 13, wherein the first logical channel is included in a first logical channel group, LCG, and the second logical channel is included in a second LCG.
  15. 15. The method of claim 14, wherein the configuration indicates the first time remaining threshold for the first logical channel for the first LCG and a second time remaining threshold for the second logical channel for the second LCG, the first time remaining threshold being different from the second time remaining threshold.
  16. 16. The method of claim 14, wherein the configuration indicates the first time remaining threshold for the first logical channel for the first LCG and a second time remaining threshold for the second logical channel for the second LCG, wherein the first time remaining threshold and the second time remaining threshold are the same.
  17. 17. The method of any of claims 14 to 16 wherein the DSR indicates: The first remaining delay time of the first logical channel in the first LCG and the second remaining delay time of the second logical channel in the second LCG based on the number of bits in the bit field, A buffer size corresponding to an amount of data associated with each of the first and second remaining delay times based on a capacity of the data in the logical channel buffers of the first and second logical channels, and LCG identifiers ID of the first LCG and the second LCG.
  18. 18. An apparatus for wireless communication, comprising a memory, a transceiver, and a processor coupled to the memory and the transceiver, the apparatus configured to implement the method of any of claims 1-17.

Description

Delayed status report enhancement Cross Reference to Related Applications The present application claims the benefit and priority of U.S. provisional application Ser. No. 63/586,867, filed on 29 at 9 at 2023, and U.S. provisional application Ser. No. 63/609,564, filed on 13 at 12 at 2023, both entitled "Delay Status Reporting Enhancement (delayed State report enhancement"), which are expressly incorporated herein by reference in their entireties. Technical Field The present disclosure relates generally to wireless communications, and more particularly to delay status reporting of data in a logical channel buffer. Background The third generation partnership project (3 GPP) specifies a radio interface called the fifth generation (5G) New Radio (NR) (5G NR). The architecture of a 5G NR wireless communication system (5 GS) includes a 5G core (5 GC) network, a 5G radio access network (5G-RAN), a 5G User Equipment (UE), and the like. The 5G NR architecture strives to provide increased data rates, reduced latency, and/or increased capacity compared to previous generation cellular communication systems. In general, wireless communication systems provide various telecommunication services (e.g., telephony), video, data, messaging, etc.) based on multiple access techniques, such as Orthogonal Frequency Division Multiple Access (OFDMA) techniques, that support communication with multiple UEs. Improvements in mobile broadband continue to advance in such wireless communication technologies. For example, the UE transmits a Delay Status Report (DSR) to the network entity indicating delay information for data to be processed at the UE. There is an opportunity to define DSR in a manner that balances the desire to provide UE pending data information in a timely manner with the desire for limited overhead signaling. Disclosure of Invention The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects. This summary does not identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later. Augmented reality (XR) data transmitted between a User Equipment (UE) and a network entity may experience jitter caused by delay variations at an encoder-decoder (codec) that encodes the XR data. Thus, the UE transmits a Delay Status Report (DSR) to the network entity to indicate delay information for each Logical Channel (LCH) or each Logical Channel Group (LCG). In an example, the UE transmits DSR to indicate delay information of an LCH transmission buffer including XR data. In another example, the UE transmits DSR to indicate delay information of the LCG. DSR may also be used to report non-XR data. The DSR may also indicate the data capacity in the logical channel buffer along with the priority of the data. The network entity uses the information included in the DSR to perform "delay aware" uplink scheduling of the data in the logical channel buffers (e.g., based on urgency and/or priority of the data). The UE calculates a remaining time of the data unit in the logical channel transmission buffer before a Packet Data Convergence Protocol (PDCP) discard timer expires. For example, the UE indicates to the network entity via the DSR that the expiration time (e.g., discard time) of the PDCP discard timer is the remaining delay time before the discard of the data unit in the logical channel buffer should occur. The DSR may indicate to the network entity the remaining delay time and capacity information of the data in the logical channel buffer. In some examples, the UE has data waiting to be processed in multiple logical channel buffers at the same time, but the DSR is only configured to indicate the remaining delay time of one logical channel. Aspects of the present disclosure address the above and other drawbacks by implementing a medium access control-control element (MAC-CE) for DSR to indicate remaining delay times and data capacity information for multiple logical channels. The DSR is triggered based on a threshold criterion (e.g., remaining delay time) that satisfies at least one of the logical channels in the LCG. According to some aspects, a UE receives (and the network entity transmits to the UE) a configuration of DSR for reporting data in a logical channel buffer. The configuration indicates a first time remaining threshold that triggers DSR. The UE transmits (and the network entity receives) the DSR to the network entity when a first remaining delay time from discarding of data in the logical channel buffer of the first logical channel is less than a first remaining time threshold. DSR indicates a first remaining delay time of a first logical channel and a second remaining delay time of a second logical channel. D