Relay UE Inactivity Timers for RRC Release Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The challenge of maintaining an RRC connection between a relay UE and a network while minimizing power consumption, especially when there is no data transmission or reception, leading to potential communication disruptions.
Innovation Solution
Implementing Uu data and sidelink data inactivity timers to manage the RRC connection release, ensuring continuous data relay by the relay UE if the timers do not expire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the RRC connection is maintained between relay UE and network, then communication reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements dynamic connection management by introducing separate inactivity timers for Uu link and sidelink. The RRC connection state is dynamically adjusted based on real-time data activity on different links, allowing the system to transition between connected and idle states optimally, thus resolving the contradiction between maintaining reliable connection and reducing power consumption.
Solution Approach 2:
The patent segments the inactivity detection mechanism into two independent timers: one for Uu link data inactivity and another for sidelink data inactivity. This segmentation allows independent monitoring of each link's data activity, enabling precise control over when to release the RRC connection, thereby balancing reliability and power consumption.
2Use of energy by moving object
If the RRC connection is released to save power, then power consumption is reduced, but communication continuity deteriorates
Solution Approach 1:
The patent performs preliminary detection of data inactivity on both Uu link and sidelink before releasing the RRC connection. By monitoring both links simultaneously and only releasing when both are inactive, the system ensures that power is saved without compromising communication continuity, as the connection is maintained as long as any data transmission is occurring.
3Use of energy by moving object
If data inactivity timer is used to release RRC connection, then power consumption is reduced, but risk of premature connection release increases
Solution Approach 1:
The patent introduces a dual-timer mechanism as an intermediary between data activity detection and RRC connection release decision. The separate Uu and sidelink inactivity timers act as mediators that filter out transient inactivity periods, ensuring the connection is only released when both links have been inactive for the configured timer duration, thus preventing premature release while still enabling power savings.
Data Source
AI summary
Provided are a method for performing wireless communication by a first device relaying communication between a second device and a base station, and an apparatus for supporting same. The method may comprise the steps of: establishing a first radio resource control (RRC) connection to the base station; establishing a PC5 connection to the second device; on the basis that there is no data transmission and reception between the first device and the base station, initiating a Uu data inactivity timer; on the basis that there is no data transmission and reception between the first device and the second device, initiating a sidelink (SL) data inactivity timer; and on the basis that the Uu data inactivity timer and the SL data inactivity timer are expired, releasing the first RRC connection between the first device and the base station.