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CN-122029883-A - Uplink data segmentation triggered by delay state

CN122029883ACN 122029883 ACN122029883 ACN 122029883ACN-122029883-A

Abstract

Aspects of the present disclosure relate to UL data segmentation triggered by a delay state. In one aspect, a UE receives at least one UL split threshold from one of a first base station and a second base station, the at least one UL split threshold associated with a delay state for a UL split bearer. Based on the at least one UL split threshold, the UE performs UL data transmission of UL split bearers using both a primary path associated with a primary RLC entity of the UE and a secondary path associated with a split secondary RLC entity of the UE.

Inventors

  • DAI MINGZENG
  • XU XIAOYING
  • WU LIANHAI

Assignees

  • 联想(北京)有限公司

Dates

Publication Date
20260512
Application Date
20231016

Claims (20)

  1. 1. A User Equipment (UE), comprising: Processor, and A transceiver coupled to the processor, Wherein the processor is configured to: receiving at least one Uplink (UL) split threshold from one of a first base station and a second base station via the transceiver, the at least one UL split threshold being associated with a delay state for a UL split bearer, and UL data transmission of the UL split bearer is performed using both a primary path associated with a primary Radio Link Control (RLC) entity of the UE and a secondary path associated with a split secondary RLC entity of the UE based on the at least one UL split threshold.
  2. 2. The UE of claim 1, wherein: The at least one UL split threshold includes a first UL split threshold for a remaining time associated with a delay state, and The processor is configured to use both the primary path and the secondary path for UL data transmission of the UL split bearer by: UL data transmission of the UL split bearer is performed using both the primary path and the secondary path based on determining that a minimum remaining time of UL data is less than or equal to the first UL split threshold for remaining time.
  3. 3. The UE of claim 1, wherein: the at least one UL split threshold includes a second UL split threshold for an amount of data associated with the delay state, and The processor is configured to use both the primary path and the secondary path for UL data transmission of the UL split bearer by: UL data transmissions of the UL split bearer using both the primary path and the secondary path based on determining that an amount of data associated with the delay state is greater than or equal to the second UL split threshold for an amount of data.
  4. 4. The UE of claim 1, wherein: The at least one UL split threshold includes a first UL split threshold for a remaining time associated with a delay state and a second UL split threshold for an amount of data associated with the delay state, and The processor is configured to use both the primary path and the secondary path for UL data transmission of the UL split bearer by: UL data transmission of the UL split bearer using both the primary path and the secondary path based on determining that the minimum remaining time of UL data is less than or equal to the first UL split threshold for remaining time and that an amount of data associated with the delay state is greater than or equal to the second UL split threshold for an amount of data.
  5. 5. The UE of claim 3 or 4, wherein the amount of data associated with the delay state comprises one of: A first amount of data of a first set of data packets associated with the primary path, wherein a remaining time of the first set of data packets is less than or equal to a threshold for triggering a reporting of a Delay Status Report (DSR), A second amount of data for a second set of data packets associated with the secondary path, wherein a remaining time of the second set of data packets is less than or equal to the threshold for triggering the reporting of the DSR, or And a sum of the first data amount and the second data amount.
  6. 6. The UE of claim 1, wherein the at least one UL segmentation threshold comprises a third UL segmentation threshold, and The processor is configured to use both the primary path and the secondary path for UL data transmission of the UL split bearer by: UL data transmission of the UL split bearer using both the primary path and the secondary path based on determining that a total amount of a first amount of data to be transmitted in a Packet Data Convergence Protocol (PDCP) entity of the UE and a second amount of data to be initially transmitted in the primary RLC entity and the split secondary RLC entity of the UE is equal to or greater than the third UL split threshold.
  7. 7. The UE of claim 1, wherein the processor is further configured to: A first Delay Status Report (DSR) of the UL split bearer and a second DSR of the UL split bearer are transmitted via the transceiver to the first base station and the second base station over the primary path and the secondary path, respectively, wherein the first DSR is associated with the primary path and the second DSR is associated with the secondary path.
  8. 8. The UE of claim 7, wherein: The processor is further configured to: Triggering the reporting of the first DSR based on determining that the minimum remaining time of UL data associated with the primary path is less than or equal to a first threshold for triggering the reporting of the first DSR, and The UL data associated with the primary path includes at least one of: A Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU) or a PDCP Protocol Data Unit (PDU) to be routed to the primary RLC entity or to both the primary RLC entity and the segmented secondary RLC entity, and RLC SDUs or RLC PDUs to be transmitted in the primary RLC entity.
  9. 9. The UE of claim 8, wherein the UL data associated with the primary path comprises a first set of data packets associated with the primary path, the first DSR comprises an amount of data for the first set of data packets, and a remaining time of the first set of data packets is less than or equal to the first threshold for triggering reporting of the first DSR.
  10. 10. The UE of claim 7, wherein: The processor is further configured to: triggering the reporting of the second DSR based on determining that the minimum remaining time of UL data associated with the secondary path is less than or equal to a second threshold for triggering the reporting of the second DSR, and The UL data associated with the secondary path includes at least one of: A Packet Data Convergence Protocol (PDCP) Service Data Unit (SDU) or a PDCP Protocol Data Unit (PDU) to be routed to the segmented secondary RLC entity or to both the primary RLC entity and the segmented secondary RLC entity, and RLC SDUs or RLC PDUs to be transmitted in the segmentation secondary RLC entity.
  11. 11. The UE of claim 1, wherein the processor is further configured to: A Delay Status Report (DSR) of the UL split bearer is sent via the transceiver to the first and second base stations over the primary and secondary paths, respectively, wherein the DSR is associated with both the primary and secondary paths.
  12. 12. The UE of claim 11, wherein: The processor is further configured to: triggering the reporting of the DSR based on determining that a minimum remaining time of UL data associated with both the primary path and the secondary path is less than or equal to a threshold for triggering the reporting of the DSR, and The UL data associated with both the primary path and the secondary path includes at least one of: Packet Data Convergence Protocol (PDCP) Service Data Units (SDUs) or PDCP Protocol Data Units (PDUs) to be transmitted, and RLC SDUs or RLC PDUs to be transmitted in the primary RLC entity and the segmented secondary RLC entity.
  13. 13. The UE of claim 12, wherein the UL data associated with both the primary path and the secondary path comprises a third set of data packets associated with both the primary path and the secondary path, the DSR comprises an amount of data for the third set of data packets, and a remaining time of the third set of data packets is less than or equal to the threshold for triggering reporting of the DSR.
  14. 14. The UE of claim 13, wherein the third set of data packets comprises a first subset of data packets in the primary RLC entity, a second subset of data packets in the segmented secondary RLC entity, and a third subset of data packets in a PDCP entity of the UE.
  15. 15. The UE of claim 14, wherein the processor is further configured to: Providing a first amount of data from the first subset of data packets of the primary RLC entity to a second Medium Access Control (MAC) entity of the UE associated with the segmented secondary RLC entity; Providing a second data amount from the second subset of data packets of the segmented secondary RLC entity to a first MAC entity of the UE associated with the primary RLC entity, and Providing a third data amount from the third subset of data packets of the PDCP entity to the first MAC entity and the second MAC entity, respectively.
  16. 16. The UE of claim 14, wherein the processor is further configured to: providing a first amount of data from the first subset of data packets of a MAC entity of the UE associated with the primary RLC entity to a second Medium Access Control (MAC) entity of the UE associated with the segmented secondary RLC entity; providing the first MAC entity with a second amount of data from the second subset of data packets of the second MAC entity, and Providing a third data amount from the third subset of data packets of the PDCP entity to the first MAC entity and the second MAC entity, respectively.
  17. 17. The UE of claim 1, wherein: The processor is further configured to: Receiving an indication from one of the first base station and the second base station via the transceiver, the indication indicating that the secondary path is used for at least one Protocol Data Unit (PDU) set having at least one value of PDU Set Importance (PSI), and The processor is configured to use both the primary path and the secondary path for UL data transmission of the UL split bearer by: Based on the indication, UL data transmission of the at least one PDU set with the at least one value of PSI is performed using the secondary path.
  18. 18. The UE of claim 17, wherein the processor is further configured to: A first Delay Status Report (DSR) of the UL split bearer and a second DSR of the UL split bearer are transmitted via the transceiver to the first base station and the second base station over the primary path and the secondary path, respectively, wherein the first DSR is associated with the primary path and the second DSR is associated with the secondary path.
  19. 19. A processor for wireless communication, comprising: At least one memory, and A controller coupled to the at least one memory and configured to cause the controller to: Receiving at least one Uplink (UL) split threshold from one of a first base station and a second base station, the at least one UL split threshold being associated with a delay state for a UL split bearer, and UL data transmission of the UL split bearer is performed using both a primary path associated with a primary Radio Link Control (RLC) entity of the UE and a secondary path associated with a split secondary RLC entity of the UE based on the at least one UL split threshold.
  20. 20. A method for wireless communication, comprising: Receiving at a User Equipment (UE) at least one Uplink (UL) split threshold from one of a first base station and a second base station, the at least one UL split threshold being associated with a delay state for a UL split bearer, and UL data transmission of the UL split bearer is performed using both a primary path associated with a primary Radio Link Control (RLC) entity of the UE and a secondary path associated with a split secondary RLC entity of the UE based on the at least one UL split threshold.

Description

Uplink data segmentation triggered by delay state Technical Field The present disclosure relates to wireless communications, and more particularly, to a User Equipment (UE), base station, and method for supporting Uplink (UL) data segmentation triggered by a delay state. Background A wireless communication system may include one or more network communication devices, such as base stations, which may also be otherwise referred to as enodebs (enbs), next-generation nodebs (gnbs), or other suitable terminology. Each network communication device, such as a base station, may support wireless communications for one or more user communication devices (which may also be otherwise referred to as UEs, or other suitable terminology). A wireless communication system may support wireless communication with one or more user communication devices by utilizing resources (e.g., time resources (e.g., symbols, slots, subframes, frames, etc.) or frequency resources (e.g., subcarriers, carriers)) of the wireless communication system. Additionally, the wireless communication system may also support wireless communications across multiple radio access technologies, including third generation (3G) radio access technologies, fourth generation (4G) radio access technologies, fifth generation (5G) radio access technologies, and other suitable radio access technologies other than 5G (e.g., sixth generation (6G)). Currently, in Dual Connectivity (DC), for split bearers, a Packet Data Convergence Protocol (PDCP) entity of a User Equipment (UE) is associated with two Radio Link Control (RLC) entities, namely a primary RLC entity and a split secondary RLC entity. Split bearers may be defined as bearers using both MgNB and SgNB resources in dual connectivity with radio protocols in both the primary gcb (MgNB) and the secondary gcb (SgNB). The segmentation of the secondary RLC entity may be defined as the RLC entity responsible for the segmentation bearer operation in addition to the primary RLC entity in the dual connectivity. If the PDCP entity is associated with two RLC entities, the segmentation secondary RLC entity is an RLC entity other than the primary RLC entity. If the PDCP entity is associated with more than two RLC entities, the segmentation secondary RLC entity is configured by an upper layer. Disclosure of Invention The present disclosure relates to a UE and method supporting UL data segmentation triggered by a delay state. With this UE and method, delay state information is considered for PDCP routing, e.g., for selecting only the primary path, or both the primary and secondary paths, for UL data transmission of split bearers. Some implementations of a UE described herein may include a processor and a transceiver coupled to the processor, wherein the processor is configured to receive, via the transceiver, at least one UL split threshold from one of a first base station and a second base station, the at least one UL split threshold being associated with a delay state for a UL split bearer, and to perform UL data transmission for the UL split bearer based on the at least one UL split threshold using both a primary path associated with a primary RLC entity of the UE and a secondary path associated with a split secondary RLC entity of the UE. In some implementations, the at least one UL split threshold includes a first UL split threshold for a remaining time associated with the delay state, and the processor is configured to perform UL data transmission for the UL split bearer using both the primary path and the secondary path based on determining that a minimum remaining time of UL data is less than or equal to the first UL split threshold for the remaining time. In some implementations, the at least one UL split threshold includes a second UL split threshold for an amount of data associated with the delay state, and the processor is configured to perform UL data transmission for the UL split bearer using both the primary path and the secondary path based on determining that the amount of data associated with the delay state is greater than or equal to the second UL split threshold for the amount of data. In some implementations, the at least one UL split threshold includes a first UL split threshold for a remaining time associated with the delay state and a second UL split threshold for an amount of data associated with the delay state, and the processor is configured to perform UL data transmission for UL split bearers using both the primary path and the secondary path based on determining that a minimum remaining time of UL data is less than or equal to the first UL split threshold for the remaining time and the amount of data associated with the delay state is greater than or equal to the second UL split threshold for the amount of data. In some implementations, the amount of data associated with the delay state includes one of a first amount of data of a first set of data packets associated with the primary path, wherein a