RRC Resume Timer Stopping After Suspend or Cell Reselection
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Solution Overview
Problem
In the context of 5G NR, the existing mechanisms for handling RRC connection resume procedures are inefficient due to the inability to stop timers accurately when encrypted messages are received, leading to unnecessary UE actions and battery consumption, especially in scenarios where network synchronization is lost.
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 optimizing resource usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE continues the connection establishment procedure after timer expiry, then the procedure may complete successfully, but unnecessary UE actions and battery consumption occur
Solution Approach 1:
The patent applies preliminary action by stopping the timer at specific events (integrity check failure, receiving suspend/release messages, cell reselection) before the timer expires. This prevents the UE from continuing unnecessary connection establishment procedures, thereby avoiding wasted battery consumption while maintaining reliability by stopping at appropriate checkpoints.
2Use of energy by moving object
If the UE stops the timer early upon receiving encrypted messages, then battery is conserved, but the connection establishment may be prematurely terminated
Solution Approach 1:
The patent implements feedback mechanisms by monitoring specific events during the connection establishment procedure. The timer is stopped based on feedback from integrity check results, received messages (suspend/release), and cell reselection status. This feedback-driven approach ensures the timer is stopped only when appropriate conditions are met, balancing battery conservation with connection establishment reliability.
3Reliability
If the UE performs integrity checks on all received messages, then message security is ensured, but processing time and energy increase
Solution Approach 1:
The patent applies preliminary action by performing integrity checks at specific points in the procedure and stopping the timer upon failure. This allows the UE to detect security issues early without completing the entire connection establishment procedure, thereby reducing overall processing time while maintaining security through targeted integrity verification.
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.