Wireless Communication Path Switch Timer Control
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Solution Overview
Problem
In wireless communication systems, there is a challenge in successfully switching from a direct path to an indirect path during handovers, leading to potential communication interruptions and delays due to improper timer control and lack of effective evaluation criteria for establishing an indirect path.
Innovation Solution
A method involving the use of timers for controlling handovers, where a first message initiates a switch from a direct path to an indirect path, and a first signal received before timer expiration stops the timer, ensuring successful RRC re-establishment and feedback through RRC messages transmitted via direct and indirect paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a timer is set to control the switch from direct path to indirect path, then the handover process can be managed, but the delay becomes too long or communication interruptions occur when the timer expires improperly
Solution Approach 1:
The patent implements feedback mechanisms where the remote UE monitors whether the indirect path has been successfully established during the timer period. Based on this feedback, the timer is stopped early if success is achieved, or allowed to expire if unsuccessful, enabling adaptive timer control that balances reliability and delay.
Solution Approach 2:
The timer control is made dynamic rather than static. The timer can be stopped at different times depending on whether indirect path establishment succeeds, allowing the system to adapt to actual network conditions and avoid unnecessary delays while maintaining reliability.
2Reliability
If the remote UE waits or attempts unrestrictedly during path switch, then the indirect path establishment can be ensured, but excessive delay or communication interruption occurs
Solution Approach 1:
The patent applies partial action by allowing the UE to attempt indirect path establishment only to the extent necessary (monitored by the timer), rather than unrestricted waiting. The timer sets a reasonable boundary that prevents excessive waiting while still allowing sufficient time for successful establishment.
Solution Approach 2:
The system uses feedback from the indirect path establishment process to control the timer behavior. When establishment succeeds, feedback stops the timer early; when it fails, the timer expires naturally, preventing unnecessary delays in both scenarios.
3Adaptability or versatility
If traditional timers are used for direction communication, then general communication timing can be managed, but special scenarios like path switching cannot be dealt with effectively
Solution Approach 1:
The patent applies local quality by creating a specialized timer mechanism specifically for path switching scenarios, rather than using generic timers universally. This specialized timer has specific behaviors and evaluation criteria tailored to indirect path establishment, improving reliability for this particular function.
Solution Approach 2:
The patent introduces an intermediary evaluation mechanism that assesses whether the indirect path has been successfully established before allowing timer expiration. This intermediary layer adapts the traditional timer concept to handle the special requirements of path switching scenarios.
Data Source
AI summary
Present application receiving a first message, the first message indicating a switch from a direct path to an indirect path; and starting a first timer; an expiration of the first timer triggering an RRC re-establishment; receiving a first signal on a sidelink after the action of starting a first timer and before the expiration of the first timer; and stopping the first timer as a response to receiving the first signal; and transmitting a second message, the second message used for feedback of the first message; herein, the first message is transmitted via the direct path; the second message is transmitted via the indirect path; the first message and the second message are RRC messages, respectively; the second message is relayed by a transmitter of the first signal. By receiving the first message and the first signal the present application can perform path switch.