Timer T319 Control for RRC Connection Resume in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems face challenges in managing the duration of RRC connection resume procedures, particularly during small data transmission and subsequent data transmission, where the timer T319 may expire prematurely, leading to unintended transitions to RRC_IDLE.
Innovation Solution
Implementing a method to control and configure timer T319 by starting, stopping, and restarting it based on specific conditions such as reception of RRC response messages, lower layer acknowledgments, UL grants, DL assignments, and PDCCH monitoring, allowing for flexible timer values and configurations tailored to small data and subsequent data transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If timer T319 is used to control the duration of RRC connection resume procedure, then the procedure duration is limited, but the timer may expire prematurely during small data transmission and subsequent data transmission
Solution Approach 1:
The patent applies dynamics by making the timer T319 configurable with different values based on the transmission scenario. The network can dynamically select between a first timer value for small data transmission and a second timer value for subsequent data transmission, allowing the timer to adapt to different procedural durations and avoid premature expiry while maintaining appropriate time limits.
2Productivity
If the timer is stopped upon reception of RRC response message, then the connection resume procedure is efficiently terminated, but the UE may not be ready for subsequent data transmission
Solution Approach 1:
The patent segments the timer control into distinct phases: a first timer value is used during the initial connection resume procedure, and a second timer value is applied when subsequent data transmission is detected. This segmentation allows the system to maintain efficiency during resumption while providing extended time availability for subsequent data transmission without requiring the UE to transition to RRC_CONNECTED state.
Data Source
AI summary
Methods and apparatuses are provided for starting a timer, or one or more timers, upon initiation of a RRC connection resume procedure, wherein the timer is used to control duration of the RRC connection resume procedure. The timer used to control the duration of RRC connection resume procedure can be well managed, controlled, and configured in the case of small data transmission and possible subsequent data transmission. The timer can be stopped by the UE without receiving a RRC response message of a RRC Resume Request message. The timer can be restarted upon completion of a random access procedure. There can be multiple timers, e.g., two in certain embodiments, of varying values and/or lengths.