Wireless Retransmission Counter Reset Mechanism
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Solution Overview
Problem
In wireless communication systems, managing retransmission counters efficiently is challenging due to limited resources and the need to minimize latency, especially in applications sensitive to delay and reliability.
Innovation Solution
A method is introduced where a retransmission counter associated with a data unit is incremented and reset to zero when it reaches a maximum value, with a max retransmission indication reported to the upper layer, and optionally resetting other counters within the same protocol data unit, facilitating efficient retransmission management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the retransmission counter is continuously incremented without reset, then the counter accurately tracks retransmission attempts, but the system complexity increases and latency accumulates
Solution Approach 1:
The patent applies the discarding and recovering principle by resetting the retransmission counter to zero when it reaches a maximum value. This allows the counter to be reused for new data units, preventing unlimited counter increments while maintaining accurate tracking of retransmission attempts within each data unit's lifecycle. The counter is discarded (reset) and recovered (reused) efficiently.
Solution Approach 2:
The patent changes the state parameter of the retransmission counter from a continuously increasing value to a bounded value that resets at a maximum threshold. This parameter change (from unbounded increment to bounded reset) resolves the contradiction by maintaining tracking accuracy while preventing system complexity from accumulating indefinitely.
2Productivity
If the retransmission counter is reset to zero after reaching max value, then the counter can be reused efficiently, but ambiguity may arise in tracking retransmission history
Solution Approach 1:
The patent segments the counter management into independent per-data-unit counters rather than a single cumulative counter. Each data unit has its own retransmission counter that is reset independently, allowing efficient reuse while maintaining clear association between counter values and specific data units. This segmentation eliminates ambiguity about which data unit the counter refers to.
Solution Approach 2:
The patent implements feedback mechanisms where the reset of retransmission counters is triggered by specific events (maximum value reach, successful transmission, or data unit release). This event-driven feedback ensures that counter resets occur at appropriate moments, maintaining productivity while preserving necessary retransmission history information through the feedback trigger conditions.
3Use of energy by moving object
If multiple data units share the same counter resource, then resource utilization improves, but counter management becomes ambiguous and error-prone
Solution Approach 1:
The patent segments the counter resource into multiple independent counters, one for each data unit, rather than sharing a single counter among multiple data units. This segmentation improves reliability by ensuring each counter accurately tracks its associated data unit's retransmissions without ambiguity, while the modular structure maintains efficient resource utilization through independent management.
Data Source
AI summary
The present invention relates to a method for performing retransmissions by a transmission end in a wireless communication system. In particular, the method includes the steps of: re-transmitting a data unit to a reception end; and increasing a retransmission counter associated with the data unit, when the retransmission counter associated with the data unit reaches to a max value, reporting a max retransmission indication to an upper layer and setting the retransmission counter associated with the data unit to zero.