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US-20260129708-A1 - METHOD AND DEVICE IN A NODE FOR A TIME INTERVAL AND AN ACCESS PROCEDURE IN WIRELESS COMMUNICATION

US20260129708A1US 20260129708 A1US20260129708 A1US 20260129708A1US-20260129708-A1

Abstract

Disclosure discloses a method and a device in a node used for wireless communications. A node first receives first information, and then transmits a first signal and triggers a first timer, the first timer is expired and triggers a first procedure; the first information is used to determine a first time interval length; the first timer is started in a first time window, the first time window comprising a positive integer number of slots; a time interval between an end time of transmission of the first signal and a start of the first time window is equal to the first time interval length; the first procedure is related to the type of the first timer. By associating a start time of timing of the first timer with the first time interval length, the present disclosure optimizes the RRM and/or RLM timer design in NTN, thus improving the overall performance.

Inventors

  • Qi Jiang
  • Xiaobo Zhang

Assignees

  • APOGEE NETWORKS, LLC

Dates

Publication Date
20260507
Application Date
20251229
Priority Date
20200513

Claims (20)

  1. 1 . A user equipment (UE) comprising: a transceiver and at least one processor, wherein the transceiver and the at least one processor are configured to: receive radio resource control (RRC) signaling information; determine a time interval length based on the RRC signaling information; transmit a signal; trigger a timer based on the transmission of the signal, wherein the timer is started in a time window, wherein a time interval between an end time of transmission of the signal and a start of the time window is equal to the time interval length, wherein the time window is related to a round trip time (RTT) between the UE and a base station; and trigger a procedure based on a determination that the timer is expired, wherein the procedure is related to a type of the timer.
  2. 2 . The UE of claim 1 , wherein the transceiver and the at least one processor are further configured to retransmit the signal.
  3. 3 . The UE of claim 1 , wherein the signal is a Msg3.
  4. 4 . The UE of claim 1 , wherein the transceiver and the at least one processor are further configured to receive a further signal before the timer is expired.
  5. 5 . The UE of claim 4 , wherein the further signal is a Msg4.
  6. 6 . The UE of claim 1 , wherein the base station is a satellite base station.
  7. 7 . The UE of claim 1 , wherein the UE and the base station are in a non-terrestrial network (NTN).
  8. 8 . The UE of claim 1 , wherein the timer and the procedure are used for radio link management.
  9. 9 . The UE of claim 1 , wherein the timer and the procedure are used for radio resource management.
  10. 10 . The UE of claim 1 , wherein the time interval length is related to a timing advance.
  11. 11 . A method in a user equipment (UE), the method comprising: receiving radio resource control (RRC) signaling information; determining a time interval length based on the RRC signaling information; transmitting a signal; triggering a timer based on the transmission of the signal, wherein the timer is started in a time window, wherein a time interval between an end time of transmission of the signal and a start of the time window is equal to the time interval length, wherein the time window is related to a round trip time (RTT) between the UE and a base station; and triggering a procedure based on a determination that the timer is expired, wherein the procedure is related to a type of the timer.
  12. 12 . The method of claim 11 , further comprising: retransmitting the signal.
  13. 13 . The method of claim 11 , wherein the signal is a Msg3.
  14. 14 . The method of claim 11 , further comprising: receiving a further signal before the timer is expired.
  15. 15 . The method of claim 14 , wherein the further signal is a Msg4.
  16. 16 . The method of claim 11 , wherein the base station is a satellite base station.
  17. 17 . The method of claim 11 , wherein the UE and the base station are in a non-terrestrial network (NTN).
  18. 18 . The method of claim 11 , wherein the timer and the procedure are used for radio link management.
  19. 19 . The method of claim 11 , wherein the timer and the procedure are used for radio resource management.
  20. 20 . The method of claim 11 , wherein the time interval length is related to a timing advance.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. Patent Application No. 17/974,547 filed on October 27, 2022, which is a continuation of International Application No. PCT/CN2021/093478, filed May 13, 2021, which claims the priority benefit of Chinese Patent Application No.202010401057.8, filed on May 13, 2020, and claims the priority benefit of Chinese Patent Application No.202010428699.7, filed on May 20,2020 the full disclosure of which is incorporated herein by reference. BACKGROUND TECHNICAL FIELD The present disclosure relates to transmission methods and devices in wireless communication systems, and in particular to the design of a timer in Radio Resource Management (RRM) or Radio Link Monitoring (RLM) procedure, as well as a corresponding method and device for radio signal transmission. RELATED ART In a 5G system, a variety of timers have been defined to ensure operations of an RLM or an RRM procedure, for example, as provided in the Technical Specification (TS) 38.331, a T304 is used for procedures relevant to Radio Resource Control (RRC) reconfiguration, or, a T312 is used for procedures relevant to measurement report submission and handover of a corresponding cell, however, the above timers are generally designed for application scenarios of Terrestrial Network (TN), in which there isn’t any large transmission delay in existence. At the 3GPP RAN #75 plenary meetings, a study item (SI) of Non-Terrestrial Networks (NTN) over NR was approved, which starts with R15 and proceeds in the subsequent R17 where a WI is initiated to standardize relevant techniques. In view of NTN scenarios, the above timer designs shall be optimized in another way. SUMMARY In NTN scenario, a Round Trip Time (RTT) is required to be introduced in an interaction between a terminal and a base station. Compared with TN, satellites orbiting at higher altitude, such as a Geostationary Earth Orbiting (GEO) satellite, may be deferred by a transmission latency of up to dozens of milliseconds, which in turn will cause great impact on the time counting of a timer, and then influences the timer’s design. A solution put forward to address the issue is to increase the expiration term for the existing timers in RRM and RLM, but that will raise another issue of unnecessary power consumption. Targeting the application scenarios and requirements of NTN, the present disclosure provides a solution. It should be noted that if no conflict is incurred, embodiments in a first node in the present disclosure and the characteristics of the embodiments are also applicable to a base station, and embodiments in a second node in the present disclosure and the characteristics of the embodiments are also applicable to a terminal. Meanwhile, the embodiments in the present disclosure and the characteristics in the embodiments can be arbitrarily combined if there is no conflict. Furthermore, although originally targeted at scenarios with larger transmission delay, the present disclosure is also applicable to scenarios with normal transmission delay, and, although originally targeted at terminal-base station scenarios, the present disclosure is also applicable to inter-terminal scenarios and radio signal transmissions between terminal and other communication nodes, where technical effects similar to those in the terminal-base station scenario will be achieved. Additionally, the adoption of a unified solution for various scenarios (including but not limited to terminal-base station communications) contributes to the reduction of hardcore complexity and costs. The present disclosure provides a method in a first node for wireless communications, comprising: receiving first information; transmitting a first signal and triggering a first timer; and determining that a first timer is expired and triggering a first procedure; herein, the first information is used to determine a first time interval length; the first timer is started in a first time window, the first time window comprising a positive integer number of consecutive slots; a time interval between an end time of transmission of the first signal and a start of the first time window is equal to the first time interval length; the first timer and the first procedure are both used for radio link management, or the first timer and the first procedure are both used for radio resource management; the first procedure is related to a type of the first timer. In one embodiment, a technical feature of the above method lies in that when the first timer is triggered by the first signal, a start time for timing of the first timer is deferred by the first time interval length, which ensures that an RTT between a terminal and a base station is not counted by the first timer, thus optimizing the timer design. In one embodiment, another technical feature of the above method lies in that the first node does not need to monitor any feedback from a base station in a time resource corresponding to