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US-12621769-B2 - Method and device for wireless communication

US12621769B2US 12621769 B2US12621769 B2US 12621769B2US-12621769-B2

Abstract

The present application provides a method and device for wireless communications, comprising as a response to a first event, measuring first reference RSRP; executing a link quality evaluation based on a first measurement criterion; wherein when a difference value between the first reference RSRP and current RSRP is less than a first threshold, the first measurement criterion is satisfied; when a difference value between the first reference RSRP and the current RSRP is not less than a first threshold, the first measurement criterion is not satisfied; the meaning of the phrase of executing a link quality evaluation based on a first measurement criterion comprises: when the first measurement criterion is satisfied, an evaluation on first radio link quality is completed within a first evaluation period. The present application can better save electricity through the first measurement criterion.

Inventors

  • Yu Chen
  • Xiaobo Zhang

Assignees

  • Apogee 5G Global, LLC

Dates

Publication Date
20260505
Application Date
20230801
Priority Date
20220811

Claims (20)

  1. 1 . A user equipment (UE) for wireless communications, the UE comprising: a transceiver; and a processor, wherein the transceiver and the processor are configured to: detect occurrence of at least one event from a set of events, wherein the set of event comprises reconfiguring a Reference Signal (RS) resource set, in response to detecting the at least one event, perform measurement on the RS resource set to determine a reference RS Receiving Power (RSRP), determine that a measurement criterion is satisfied upon determining that a difference value between the reference RSRP and a current RSRP is less than a first threshold value, determine that the measurement criterion is not satisfied when the difference value between the first reference RSRP and the current RSRP is not less than the first threshold value, on a condition that the measurement criterion is satisfied, evaluate a first radio link quality within a first evaluation period, and on a condition that the first measurement criterion is not satisfied, evaluate the radio link quality within a second evaluation period.
  2. 2 . The UE according to claim 1 , wherein measuring the reference RSRP includes setting a value of the reference RSRP to a value of the current RSRP.
  3. 3 . The UE according to claim 2 , wherein the set of events comprises: receiving a configuration of the first measurement criterion, a MAC of a cell group configured with the measurement criterion successfully completing a random access procedure, a difference value between the current RSRP and the reference RSRP being greater than 0, or the measurement criterion not being satisfied within the first time period.
  4. 4 . The UE according to claim 3 , wherein reconfiguring the RS resource set includes receiving a first signaling indicative of activating or de-activating at least one RS resource in the RS resource set, and wherein the first signaling is a physical-layer signaling or a MAC-layer signaling.
  5. 5 . The UE according to claim 3 , wherein reconfiguring the RS resource set includes receiving a second signaling indicative of adding or modifying or releasing at least one RS resource in the RS resource set, and wherein the second signaling is an RRC signaling.
  6. 6 . The UE according to claim 3 , wherein reconfiguring the RS resource set includes receiving a third signaling indicating that a QCL parameter of the RS resource set is a QCL parameter, and wherein before the third signaling is received, a QCL parameter of the RS resource set is a second QCL parameter.
  7. 7 . The UE according to claim 3 , wherein reconfiguring the RS resource set includes receiving a fourth signaling indicative of executing a cell handover, and wherein the fourth signaling is a physical-layer signaling or a MAC-layer signaling.
  8. 8 . The UE according to claim 3 , wherein reconfiguring the RS resource set includes receiving a fifth signaling used to respond to a first signal, and wherein the UE transmits the first signal upon detecting a beam failure.
  9. 9 . The UE according to claim 1 , wherein the set of events comprises: receiving a configuration of the measurement criterion, a Media Access Control (MAC) of a cell group configured with the measurement criterion successfully completing a random access procedure, a difference value between the current RSRP and the reference RSRP being greater than 0, or the measurement criterion not being satisfied within the first time period.
  10. 10 . The UE according to claim 1 , wherein reconfiguring the RS resource set includes receiving a first signaling indicative of activating or de-activating at least one RS resource in the first RS resource set, and wherein the first signaling is a physical-layer signaling or a MAC-layer signaling.
  11. 11 . The UE according to claim 1 , wherein reconfiguring the RS resource set includes receiving a second signaling indicative of adding or modifying or releasing at least one RS resource in the RS resource set, and wherein the second signaling is a Radio Resource Control (RRC) signaling.
  12. 12 . The UE according to claim 1 , wherein reconfiguring the RS resource set includes receiving a third signaling indicating that a Quasi Co-Location (QCL) parameter of the RS resource set is a first QCL parameter, and wherein before the third signaling is received, a QCL parameter of the RS resource set is a second QCL parameter.
  13. 13 . The UE according to claim 12 , wherein the third signaling indicates a first time window, and wherein the UE executes a measurement on the RS resource set based on the first QCL parameter within the first time window, and wherein after the end of the first time window, the UE executes a measurement on the RS resource set based on the second QCL parameter.
  14. 14 . The UE according to claim 13 , wherein the transceiver and the processor are further configured to: reset a power control adjustment state to 0 before or at the beginning of the first time window.
  15. 15 . The UE according to claim 1 , wherein the set of events includes an expiration of a timer.
  16. 16 . The UE according to claim 1 , wherein reconfiguring the RS resource set includes receiving a fourth signaling, indicative of executing a cell handover, and wherein the fourth signaling is a physical-layer signaling or a MAC-layer signaling.
  17. 17 . The UE according to claim 1 , wherein reconfiguring the RS resource set includes receiving a fifth signaling used to respond to a first signal, and wherein the UE transmits the first signal upon detecting a beam failure.
  18. 18 . The UE according to claim 1 , wherein the set of events includes receiving a signal after executing reconfiguration WithSync comprised in spCellConfig, reconfiguration WithSync comprised in spCellConfig not triggering a random access.
  19. 19 . The UE according to claim 1 , wherein the RS resource set only comprises one of a Channel State Information Reference Signal (CSI-RS) and a Synchronization Signal Block (SSB).
  20. 20 . A method in a user equipment (UE) for wireless communications, the method comprising: detecting occurrence of at least one event from a set of events, wherein the set of event comprises reconfiguring a Reference Signal (RS) resource set; in response to detecting the at least one event, perform measurement on the RS resource set for determining a reference RSRP; determining that a measurement criterion is satisfied upon determining that a difference value between the reference RSRP and a current RSRP is less than a threshold value; determining that the measurement criterion is not satisfied when the difference value between the reference RSRP and the current RSRP is not less than the threshold value; on a condition that the measurement criterion is satisfied, evaluating a radio link quality within a first evaluation period, and on a condition that the measurement criterion is not satisfied, evaluating the radio link quality is completed within a second evaluation period.

Description

CROSS REFERENCE TO RELATED APPLICATIONS This application claims the priority benefit of Chinese Patent Application 202210960483.4, filed on Aug. 11, 2022, the full disclosure of which is incorporated herein by reference. BACKGROUND Technical Field The present application relates to transmission methods and devices in wireless communication systems, and in particularly to measurement control for power saving. Related Art Application scenarios of future wireless communication systems are becoming increasingly diversified, and different application scenarios have different performance demands on systems. In order to meet different performance requirements of various application scenarios, 3rd Generation Partner Project (3GPP) Radio Access Network (RAN) #72 plenary decided to conduct the study of New Radio (NR), or what is called fifth Generation (5G). A work Item (WI) of NR was approved at 3GPP RAN #75 plenary to standardize NR. In communications, whether Long Term Evolution (LTE) or 5G NR involves features of accurate reception of reliable information, optimized energy efficiency ratio, determination of information efficiency, flexible resource allocation, scalable system structure, efficient non-access layer information processing, low service interruption and dropping rate and support for low power consumption, which are of great significance to the maintenance of normal communications between a base station and a UE, reasonable scheduling of resources and balancing of system payload. Those features can be called the cornerstone of high throughout and are characterized in meeting communication requirements of various service, improving spectrum utilization and improving service quality, which are indispensable in enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communications (URLLC) and enhanced Machine Type Communications (eMTC). Meanwhile, in the following communication modes, covering Industrial Internet of Things (IIoT), Vehicular to X (V2X), Device to Device communications, Unlicensed Spectrum communications, User communication quality monitoring, network planning optimization, Non-Territorial Networks (NTN), Territorial Networks (TN), and Dual connectivity system, there are extensive requirements in radio resource management and selection of multi-antenna codebooks as well as in signaling design, adjacent cell management, service management and beamforming. Transmission methods of information are divided into broadcast transmission and unicast transmission, both of which are essential for 5G system for that they are very helpful to meet the above requirements. The UE can be connected to the network directly or through a relay. With the increase of scenarios and complexity of systems, higher requirements are raised for interruption rate and time delay reduction, reliability and system stability enhancement, service flexibility and power saving. At the same time, compatibility between different versions of different systems should be considered when designing the systems. 3GPP standardization organization has done related standardization work for 5G and formed a series of standards. The standard contents can be referred to: In communication systems, power control is a very important issue. https://www.3gpp.org/ftp/Specs/archive/38_series/38.213/38213-h00.ziphttps://www.3gpp.org/ftp/Specs/archive/38_series/38.331/38331-h00.zip SUMMARY In the latest 3GPP research topic, the issue of power savings is involved. For a terminal, an important aspect of power consumption is performing measurement and link quality evaluation. In the link quality evaluation, the terminal measures downlink reference signal resources and processes the measurement result, such as using a filter for smoothing, to monitor link quality. When the quality of a current link is found to be worse than a certain threshold, the terminal can take corresponding measures to improve it, such as notifying the network or selecting a better link for communications. If power is saved and link quality is evaluated, a configuration of an appropriate evaluation time can be considered, however, if the evaluation time is too long, it means that the link quality will decrease for a long time before it can be detected, which may lead to communication quality degradation, dropped calls, and other issues. Therefore, how to better control link quality evaluation is a problem that needs to be addressed. The control of link quality evaluation can be achieved by comparing the current measurement result with a reference value, for example, when the current measurement result is not significantly different from the reference value, a time for link quality evaluation can be appropriately relaxed. If the measurement result undergoes significant changes, it indicates that the link quality changes rapidly, and more frequent measurements and evaluations are needed to track the changes in the link. But this cannot solve all the problems, since in some cases,