RLC Timer Compensation for Faster Retransmission Requests
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Solution Overview
Problem
In wireless communication systems, particularly in HSPA+ and similar technologies, there is a delay in retransmission requests due to the timer T1 mechanism, which waits for missing data before reordering and delivering packets, leading to inefficiencies in data delivery and increased latency.
Innovation Solution
A method and apparatus that compensate for the timer value when restarting timer T1 by considering the time difference between the initial data loss and the subsequent data reception, allowing for immediate retransmission requests and reducing delays in data delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the timer T1 is restarted without compensation, then the timer management is simple, but the retransmission request delay increases
Solution Approach 1:
The patent applies parameter changes by adjusting the timer T1 value dynamically based on the time difference between data loss occurrence and timer expiration. When the timer is restarted, the system calculates the elapsed time since data loss and subtracts this from the original timer value, thereby modifying the timer parameter to compensate for the delay and ensure timely retransmission requests.
2Ease of manufacture
If the timer T1 value is not compensated, then the data management is straightforward, but the retransmission timing becomes inaccurate
Solution Approach 1:
The patent implements feedback by continuously monitoring the time difference between data loss occurrence and timer expiration, then using this feedback information to adjust the timer value on restart. The system calculates the elapsed time since data loss and uses this feedback to compensate the timer, ensuring accurate retransmission timing while maintaining relatively simple data management procedures.
Data Source
AI summary
A method and an apparatus for data management through timer compensation in a wireless communication system are provided. In the method, when a data loss occurs at a first point, whether a data loss has occurred previously and so whether a timer is being driven are determined. Whether the driven timer stops or expires at a second point is determined. When the timer stops or expires at the second point, a timer value is compensated for with consideration of a time difference between the first point and the second point. A timer for the data loss of the first point is restarted based on the compensated timer value. Therefore, a delay of a retransmission request time for lost data in an RLC (Radio Link Control) layer may be minimized.