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EP-4740582-A1 - EVERAGING RATING INFORMATION FOR CUSTOMIZING LTM MOBILITY WITH SERVICE SPECIFIC PREFERENCES

EP4740582A1EP 4740582 A1EP4740582 A1EP 4740582A1EP-4740582-A1

Abstract

A wireless transmit/receive unit (WTRU) may receive a configuration associated with a plurality of candidate cells. The WTRU may send, for example to a network, a request for handover rating information (HRI) for the plurality of candidate cells. The request may include service description information associated with services running at the WTRU. The WTRU may receive a response from the network. The response may include the HRI for the plurality of candidate cells. The HRI may include an indication of how suitable each of the plurality of candidate cells is to become a target cell for the WTRU. The WTRU may select a candidate cell of the plurality of candidate cells based on the HRI. The WTRU may send an indication of the selected candidate cell to the network.

Inventors

  • OGNENOSKI, Ognen
  • MARTIN, BRIAN
  • CONCEICAO, Filipe
  • MOURAD, ALAIN
  • KULKARNI, MILIND
  • PELLETIER, BENOIT

Assignees

  • Interdigital Patent Holdings, Inc.

Dates

Publication Date
20260513
Application Date
20240703

Claims (20)

  1. 1 . A method implemented by a wireless transmit/receive unit (WTRU), the method comprising: receiving a configuration associated with a plurality of candidate cells; sending, to a network, a request for handover rating information (HRI) for the plurality of candidate cells, the request comprising service description information associated with services running at the WTRU; receiving a response from the network, the response comprising the HRI for the plurality of candidate cells, wherein the HRI comprises an indication of how suitable each of the plurality of candidate cells is to become a target cell for the WTRU, and wherein the HRI is based on the service description information; selecting a candidate cell of the plurality of candidate cells based on the HRI; and sending an indication of the selected candidate cell to the network, wherein the indication comprises selection information associated with the selection of the candidate cell.
  2. 2. The method of claim 1, wherein the HRI comprises one or more of an indication of a number of active services at the WTRU, an indication of a number of services the WTRU intends to run after the execution of a handover (HO), or an indication of an interference level or radio link related measurements associated with the plurality of candidate cells.
  3. 3. The method of claim 1 , wherein the HRI is specific to the services running at the WTRU.
  4. 4. The method of claim 1, wherein the request to the network further comprises one or more of a first identifier for a service associated with the WTRU, a second identifier for a service associated with HRI, or a third identifier associated with a predicted service.
  5. 5. The method of claim 1 , further comprising: receiving a request for rating information of the selected candidate cell; performing measurements on the selected candidate cell; and sending a measurement report to the network, the measurement report comprising measured HRI associated with the selected candidate cell.
  6. 6. The method of claim 1, further comprising sending a sidelink message to one or more other WTRUs, wherein the sidelink message comprises the indication of the selected candidate cell.
  7. 7. The method of claim 1, wherein the configuration associated with a plurality of candidate cells comprises a configuration associated with the selected candidate cell, the method further comprising: receiving a medium access control (MAC) control element (CE) associated with the selected candidate cell; determining to apply the configuration associated with the selected candidate cell; and performing a random access procedure with the selected candidate cell.
  8. 8. The method of claim 1 , wherein the request for HRI comprises a first request for HRI, the method further comprising: receiving a second request for HRI from the selected candidate cell, the second request for HRI comprising a request for information associated with a cell previously connected to the WTRU.
  9. 9. The method of claim 8, further comprising sending a response to the second request for HRI to the selected candidate cell, the response comprising the HRI for one or more of the selected candidate cell or the cell previously connected to the WTRU.
  10. 10. The method of claim 1, wherein the selection information associated with the selection of the candidate cell comprises one or more of a confidence interval associated with the selected candidate cell, an error margin associated with the selected candidate cell, or an accuracy coefficient associated with the selected candidate cell.
  11. 11. A wireless transmit/receive unit (WTRU) comprising a processor, the processor configured to: receive a configuration associated with a plurality of candidate cells; send, to a network, a request for handover rating information (HRI) for the plurality of candidate cells, the request comprising service description information associated with services running at the WTRU; receive a response from the network, the response comprising the HRI for the plurality of candidate cells, wherein the HRI comprises an indication of how suitable each of the plurality of candidate cells is to become a target cell for the WTRU, and wherein the HRI is based on the service description information; select a candidate cell of the plurality of candidate cells based on the HRI; and send an indication of the selected candidate cell to the network, wherein the indication comprises selection information associated with the selection of the candidate cell.
  12. 12. The WTRU of claim 11 , wherein the HRI comprises one or more of an indication of a number of active services at the WTRU, an indication of a number of services the WTRU intends to run after the execution of a handover (HO), or an indication of an interference level or radio link related measurements associated with the plurality of candidate cells.
  13. 13. The WTRU of claim 11 , wherein the HRI is specific to the services running at the WTRU.
  14. 14. The WTRU of claim 11 , wherein the request to the network further comprises one or more of a first identifier for a service associated with the WTRU, a second identifier for a service associated with HRI, or a third identifier associated with a predicted service
  15. 15. The WTRU of claim 11 , wherein the processor is further configured to: receive a request for rating information of the selected candidate cell; perform measurements on the selected candidate cell; and send a measurement report to the network, the measurement report comprising measured HRI associated with the selected candidate cell.
  16. 16. The WTRU of claim 11 , wherein the processor is further configured to send a sidelink message to one or more other WTRUs, wherein the sidelink message comprises the indication of the selected candidate cell.
  17. 17. The WTRU of claim 11 , wherein the configuration associated with a plurality of candidate cells comprises a configuration associated with the selected candidate cell, wherein the processor is further configured to: receive a medium access control (MAC) control element (CE) associated with the selected candidate cell; determine to apply the configuration associated with the selected candidate cell; and perform a random access procedure with the selected candidate cell.
  18. 18. The WTRU of claim 11 , wherein the request for HRI comprises a first request for HRI, wherein the processor is further configured to: receive a second request for HRI from the selected candidate cell, the second request for HRI comprising a request for information associated with a cell previously connected to the WTRU.
  19. 19. The WTRU of claim 18, wherein the processor is further configured to send a response to the second request for HRI to the selected candidate cell, the response comprising the HRI for one or more of the selected candidate cell or the cell previously connected to the WTRU.
  20. 20. The WTRU of claim 11 , wherein the selection information associated with the selection of the candidate cell comprises one or more of a confidence interval associated with the selected candidate cell, an error margin associated with the selected candidate cell, or an accuracy coefficient associated with the selected candidate cell.

Description

EVERAGING RATING INFORMATION FOR CUSTOMIZED LTM MOBILITY WITH SERVICE SPECIFIC PREFERENCES CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of United States Provisional Application No. 63/525, 194 filed on July 06, 2023, the entire contents of which are incorporated herein by reference. BACKGROUND [0002] There may be mechanisms and procedures for L1/L2 based inter-cell mobility for reducing the latency as an overarching goal, for example when compared to conventional L3 or conditional handover. L3 and conditional handover procedures may include delay, for example because of exchange of measurement reports and receipt of target configurations. LTM may allow fast application of configurations for candidate cells and/or dynamic switching between a Secondary Cell (SCell) and a Primary Cell (PCell), for example without radio resource control (RRC) signalling. [0003] RAN2 supported the baseline procedure for L1/2 Triggered Mobility (LTM). The baseline procedure may include one or more of LTM preparation, early sync, LTM execution, and/or LTM completion. An example of the baseline procedure is depicted in FIG.2. SUMMARY [0004] A wireless transmit/receive unit (WTRU) may receive a configuration. The configuration may be associated with a candidate cell. The WTRU may send a request, for example to a network. The request may be for rating information for the candidate cell. The request may include service description information. The WTRU may receive a response, for example from the network. The response may include the rating information for the candidate cell. The WTRU may send an indication, for example to the network. The indication may include a selected candidate cell. [0005] The request (e.g., to the network) may include one or more of a first identifier for a service associated with the WTRU, a second identifier for a service associated with a handover rating information (HRI), and/or a third identifier associated with a predicted service. The request (e.g., to the network) may include a list of one or more candidate cells and/or an indication of a handover rating information (HRI). The indication of an HRI may be associated with the one or more candidate cells. [0006] The WTRU may send a measurement report, for example to a base station. The measurement report may be a layer 1 (L1) measurement report. The WTRU may receive a medium access control (MAC) control element (CE) The MAC CE may include an indication of handover to a base station. The WTRU may perform a random channel access (RACH) procedure, for example on the base station. [0007] The WTRU may receive a request for rating information. The request for rating information may be for the candidate cell. The WTRU may send a measurement report, for example to a base station. The measurement report may include the rating information. [0008] A (e.g., first) WTRU may receive a configuration. The configuration may be associated with a candidate cell. The (e.g., first) WTRU may send a request. The request may be for rating information for the candidate cell. The request may include service description information. The WTRU may receive a multicast message. The multicast message may include the rating information for the candidate cell and/or an indication of another an anchor WTRU. [0009] The multicast message may include an indication that one or more other (e.g , second) WTRUs are included in a cluster. The (e.g., first) WTRU may send a sidelink message to one or more of the other (e.g., second) WTRUs, for example when the first WTRU is the anchor WTRU. The sidelink message may include an indication of a selected target cell. The (e.g., first) WTRU may receive a sidelink message reply, for example from one or more of the other (e.g., second) WTRUs. The sidelink message reply may include the selected target cell. The (e.g., first) WTRU may send an indication to a network. The indication to the network may include the selected target cell. [0010] The (e g., first) WTRU may receive a sidelink message from the anchor WTRU, for example when the (e.g., first) WTRU is not the anchor WTRU. The sidelink message may include an indication of a selected target cell. The (e.g., first) WTRU may send a sidelink message reply, for example to the anchor WTRU. The sidelink message reply may include the selected target cell. [0011] The (e.g., first) WTRU may send a measurement report, for example to a base station. The measurement report may be a layer 1 (L1) measurement report. The (e.g., first) WTRU may receive a medium access control (MAC) control element (CE). The MAC CE may include an indication of handover to a base station The (e.g., first) WTRU may perform a RACH procedure on the base station. [0012] A WTRU may receive a configuration associated with a plurality of candidate cells. The WTRU may send, for example to a network, a request for handover rating information (HRI) for the plurality of candidate cells. The request may include