RRC Resume Timer Control to Stop Unnecessary UE Actions
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Solution Overview
Problem
In the context of 5G NR, the existing mechanisms for handling RRC connection resume procedures are inadequate due to the introduction of encrypted messages, leading to issues with timers not being stopped correctly, resulting in unnecessary UE actions and inefficiencies.
Innovation Solution
Implementing a timer-based mechanism in the UE to stop connection establishment upon specific events, such as receiving a suspend or release message, or performing a cell reselection, thereby preventing unnecessary actions and ensuring timely termination of the procedure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the UE sends an RRCConnectionResumeRequest message to resume the connection, then the connection can be re-established faster with reduced signaling, but the timer may not be stopped correctly when receiving encrypted suspend or release messages, leading to unnecessary UE actions
Solution Approach 1:
The UE is configured with a timer before sending the RRCConnectionResumeRequest message. This timer is stopped in advance when specific conditions are met (receiving suspend/release messages or performing cell reselection), preventing unnecessary actions before they occur. The preliminary configuration of the timer and its stopping conditions ensures that the UE does not perform redundant operations while maintaining fast connection resume capability.
2Productivity
If the UE continues the connection establishment procedure after timer expiry, then the procedure may complete successfully, but unnecessary actions are performed wasting battery power and network resources
Solution Approach 1:
The system implements a feedback mechanism where the UE monitors for specific messages (suspend or release) and events (cell reselection) during the connection establishment procedure. When these feedback signals are received, the UE stops the timer and terminates the procedure appropriately. This feedback-driven approach ensures that the UE stops the procedure exactly when needed, avoiding unnecessary battery consumption while maintaining high productivity through efficient resource utilization.
Data Source
AI summary
A method for avoiding unnecessary actions in a connection establishment comprises sending a request to a network node to initiate the connection establishment, upon sending the request to the network node, starting a timer for the connection establishment, wherein an expiration of the timer stops the connection establishment for a user equipment (UE), and stopping the timer to stop the connection establishment upon the UE receiving a suspend message or a release message, or upon the UE performing a cell reselection procedure while the timer is running. The timer may prevent the UE from waiting the connection establishment to be completed if there is an error or bad transmission in the connection establishment. Furthermore, the timer to stop the connection establishment may avoid unnecessary actions and inform other layers in the network when the timer expires to stop the connection establishment.