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US-12628100-B2 - Paging for highly directional systems

US12628100B2US 12628100 B2US12628100 B2US 12628100B2US-12628100-B2

Abstract

Apparatus for paging for highly directional systems. A WTRU receives a default and/or a dynamic set of active SSBs which indicates the beams/SSBs is used to receive paging DCI, e.g. DCI scrambled with P-RNTI, over PDSCH. A WTRU utilizes the default and/or dynamic set of active SSBs in order to determine PDCCH monitoring occasions, PMOs, that are monitored in the WTRU's paging occasions, POs. A WTRU sends paging activating requests to activate a suitable SSB using associated UL signal/resources, if the suitable SSB fulfills a SSB criteria, if the activation duration has elapsed and if the monitoring duration has elapsed. A WTRU may send one or more paging activation requests to activate multiple SSBs, e.g., a field of view, FOV, around a suitable SSB. Said paging activation requests implements a minimal feedback-based paging procedure for paging in highly directional systems, to which the gNB replies with paging configuration for the suitable SSB.

Inventors

  • Sanjay Goyal
  • Hussain Elkotby
  • Ravikumar Pragada
  • Tanbir Haque
  • Alpaslan Demir
  • Patrick Cabrol
  • Mihaela Beluri

Assignees

  • INTERDIGITAL PATENT HOLDINGS, INC.

Dates

Publication Date
20260512
Application Date
20210902

Claims (20)

  1. 1 . A wireless transmit/receive unit (WTRU), the WTRU comprising: a processor, the processor configured to: receive system information from a network node; determine first configuration information associated with a synchronization signal and physical broadcast control channel block (SSB) using the system information; determine, using the first configuration information, an uplink resource associated with the SSB, that the SSB meets an SSB criteria, that the SSB is inactive when an activation duration has elapsed, and that the WTRU is permitted to send an activation request for the SSB when a monitoring duration has elapsed, wherein the SSB criteria includes at least that a signal measurement of a beam surpasses a threshold; if the SSB does not meet the SSB criteria, refrain from sending the activation request and disregard the SSB for paging until a subsequent monitoring duration has elapsed; and if the SSB meets the SSB criteria: send a message to the network node using the uplink resource based on the determination that the SSB meets the SSB criteria, the SSB is inactive, and the WTRU is permitted to send the activation request, wherein the message indicates the beam associated with the SSB to be used to receive paging information; receive a second configuration information from the network node, wherein the second configuration information indicates that a paging occasion associated with the SSB has been activated to receive the paging information; and receive, via the beam during the paging occasion, the paging information.
  2. 2 . The WTRU of claim 1 , wherein the SSB meets the SSB criteria if the signal measurement of the beam surpasses the threshold.
  3. 3 . The WTRU of claim 1 , wherein the processor is further configured to determine a paging failure associated with the SSB.
  4. 4 . The WTRU of claim 1 , wherein the message is a first message, and wherein the processor is further configured to send a second message to the network node if the paging information has been received by the WTRU, wherein the second message indicates a request to resume or establish a connection.
  5. 5 . The WTRU of claim 1 , wherein the activation duration is a minimum duration over which the SSB is active.
  6. 6 . The WTRU of claim 1 , wherein the monitoring duration is based on an amount of mobility of the WTRU.
  7. 7 . The WTRU of claim 1 , wherein the threshold includes a reference signal strength indicator (RSSI) threshold.
  8. 8 . The WTRU of claim 1 , wherein the threshold includes a reference signal received power (RSRP) threshold.
  9. 9 . A method implemented in a wireless transmit/receive unit (WTRU), the method comprising: receiving system information from a network node; determining first configuration information associated with a synchronization signal and physical broadcast control channel block (SSB) using the system information; determining, using the first configuration information, an uplink resource associated with the SSB, that the SSB meets an SSB criteria, that the SSB is inactive when an activation duration has elapsed, and that the WTRU is permitted to send an activation request for the SSB when a monitoring duration has elapsed, wherein the SSB criteria includes at least that a signal measurement of a beam surpasses a threshold; if the SSB does not meet the SSB criteria, refraining from sending the activation request and disregarding the SSB for paging until a subsequent monitoring duration has elapsed; and if the SSB meets the SSB criteria: sending a message to the network node using the uplink resource based on the determination that the SSB meets the SSB criteria, the SSB is inactive, and the WTRU is permitted to send the activation request, wherein the message indicates the beam associated with the SSB to be used to receive paging information; receiving a second configuration information from the network node, wherein the second configuration information indicates that a paging occasion associated with the SSB has been activated to receive the paging information; and receiving, via the beam during the paging occasion, the paging information.
  10. 10 . The method of claim 9 , wherein the SSB meets the SSB criteria if the signal measurement of the beam surpasses the threshold.
  11. 11 . The method of claim 9 , further comprising determining a paging failure associated with the SSB.
  12. 12 . The method of claim 9 , wherein the message is a first message, further comprising sending a second message to the network node if the paging information has been received by the WTRU, wherein the second message indicates a request to resume or establish a connection.
  13. 13 . The method of claim 9 , wherein the activation duration is a minimum duration over which the SSB is active.
  14. 14 . The method of claim 9 , wherein the monitoring duration is based on an amount of mobility of the WTRU.
  15. 15 . The method of claim 9 , wherein the threshold includes a reference signal strength indicator (RSSI) threshold.
  16. 16 . The method of claim 9 , wherein the threshold includes a reference signal received power (RSRP) threshold.
  17. 17 . A non-transitory storage medium comprising instructions which, when executed by one or more processors, cause the one or more processors to perform a method implemented in a wireless transmit/receive unit (WTRU), the method comprising: receiving system information from a network node; determining first configuration information associated with a synchronization signal and physical broadcast control channel block (SSB) using the system information; determining, using the first configuration information, an uplink resource associated with the SSB, that the SSB meets an SSB criteria, that the SSB is inactive when an activation duration has elapsed, and that the WTRU is permitted to send an activation request for the SSB when a monitoring duration has elapsed, wherein the SSB criteria includes at least that a signal measurement of a beam surpasses a threshold; if the SSB does not meet the SSB criteria, refraining from sending the activation request and disregarding the SSB for paging until a subsequent monitoring duration has elapsed; and if the SSB meets the SSB criteria: sending a message to the network node using the uplink resource based on the determination that the SSB meets the SSB criteria, the SSB is inactive, and the WTRU is permitted to send the activation request, wherein the message indicates the beam associated with the SSB to be used to receive paging information; receiving a second configuration information from the network node, wherein the second configuration information indicates that a paging occasion associated with the SSB has been activated to receive the paging information; and receiving, via the beam during the paging occasion, the paging information.
  18. 18 . The non-transitory storage medium of claim 17 , wherein the method further comprises determining a paging failure associated with the SSB.
  19. 19 . The non-transitory storage medium of claim 17 , wherein the message is a first message and the method further comprises sending a second message to the network node if the paging information has been received by the WTRU, wherein the second message indicates a request to resume or establish a connection.
  20. 20 . The non-transitory storage medium of claim 17 , wherein the activation duration is a minimum duration over which the SSB is active.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS This application is the National Stage Entry under 35 U.S.C. § 371 of Patent Cooperation Treaty Application No. PCT/US2021/048872, filed Sep. 2, 2021, which claims the benefit of Provisional U.S. Application No. 63/075,108, filed Sep. 5, 2020, and Provisional U.S. Application No. 63/089,937, filed Oct. 9, 2020, the disclosures of which are incorporated herein by reference in their entireties. BACKGROUND Mobile communications using wireless communication continue to evolve. A fifth generation of wireless communications may be referred to as 5G. A 5G system may use directional and/or multiple beams and may use such beams for paging. SUMMARY Systems, methods, and instrumentalities are described herein for paging for highly directional systems. A minimal feedback enable paging procedure may be provided. A WTRU may receive a default and/or a dynamic set of active synchronization signal and physical broadcast control channel blocks (SSBs), may indicate the beams/SSBs which may be used to receive paging information (e.g., downlink control information (DCI) (e.g., DCI scrambled with Paging Radio Network Temporary Identifier (P-RNTI))), and/or a message over a Physical Downlink Shared Channel (PDSCH). A WTRU may utilize a default and/or dynamic set of active SSBs that may determine PDCCH monitoring occasions (PMOs) that may be monitored in the WTRU's paging occasions (POs). A WTRU may send messages (e.g., paging activating requests) to a network to activate a suitable SSB using associated UL signal/resources, for example: if not any of the SSBs given in a configured default of active SSBs (e.g., if any) is a WTRU's suitable SSB; if not any of the SSBs given in the active set of SSBs (e.g., dynamic information) received in the last minimum activate duration paging cycles is a WTRU's suitable SSB; if a WTRU has not sent a paging activation request that activates a SSB (e.g., the same SSB) in at least a last minimum paging activation request retransmission duration paging cycles; and if a WTRU monitors the PMOs associated with the SSB for last consecutive minimum monitoring duration paging cycles but has not received one or more (e.g., any) paging related DCI and paging message over those PMOs. A WTRU may send one or more paging activation requests to activate multiple SSBs (e.g., a field of view (FOV) around a suitable SSB). Different priorities may be assigned to different SSBs (e.g., based on the DL measurements, mobility/orientation prediction, etc.). Different transmission techniques may be used (e.g., transmit (Tx) power level) in sending paging activation request to activate different SSBs with different priorities. A WTRU may determine the mobility state based on the rate of beam and/or cell reselection. A WTRU may send a paging activation request associated with the WTRU's mobility state. A WTRU may determine/update the value of the monitoring duration paging cycles (e.g., minimum monitoring duration paging cycles) based on the WTRU's mobility state. A WTRU may determine/update the value of the paging activation request retransmission paging cycles (e.g., minimum paging activation request retransmission paging cycles) based on the WTRU's mobility state. A gNB may support a minimal feedback-based paging procedure. The minimal feedback-based paging procedure may dynamically activate a beam associated with the resource/resources used for the paging activation request, for a paging group (e.g., associated POs) of the WTRU, and for a minimum duration of minimum activation duration paging cycles. One or more downlink messages, including the identification of the newly/recently re-activated beams, may be sent to the associated WTRUs/paging group using the downlink control information (e.g., DCI scrambled with P-RNTI). The minimal feedback-based paging procedure may send DCI containing schedule information of paging message, DCI containing short message, and/or paging message over PDSCH to a paging group, for example. The active beams (e.g., default and dynamically activated beams) associated with the paging group may be used. A gNB may configure the WTRUs with multiple values. For example, the multiple values may be for a minimum activation duration, minimum paging activation request retransmission duration paging cycles, and/or minimum monitoring duration paging cycles based on a number of supported WTRU's mobility states. A gNB may dynamically activate a beam for a minimum duration of minimum activation duration paging cycles associated with a requesting WTRU's mobility state. A gNB may send one or more downlink messages containing the identification(s) of a number (e.g., all) the newly/recently (re-)activated beams to the associated WTRUs/paging group. A gNB may send one or more downlink messages with activation state indication(s) associated with the selected minimum activation duration for (e.g., each of) the newly/recently (re-)activated beams. A dynamic DRX/paging cycle