Wireless Frame Retransmission Control via Retry Count Limits
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Solution Overview
Problem
Existing wireless communication systems, such as IEEE 802.11, face issues with excessive concentration of retransmissions to the same terminal or priority degree during burst transmission and aggregation, leading to inefficient use of transmission opportunities and inadequate retransmission allocation.
Innovation Solution
A wireless communication apparatus that includes a transmission manager to buffer and retransmit data frames based on retry counts and lifetime limits for each frame exchange sequence, preventing excessive retransmissions and ensuring fair bandwidth allocation among terminals and priority levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If retransmission is performed without limitation for each transmission data, then transmission reliability is improved, but transmission opportunity concentration on same terminal occurs
Solution Approach 1:
The patent introduces a frame exchange sequence counter that increments with each frame exchange sequence. When the counter reaches a predetermined threshold value, retransmission is restricted. This parameter-based control mechanism dynamically adjusts retransmission behavior based on the number of frame exchange sequences, preventing excessive concentration on single terminals while maintaining necessary retransmission reliability.
2Productivity
If aggregation frame transmission is performed to increase transmission efficiency, then bandwidth utilization is improved, but retransmission concentration on individual terminals increases
Solution Approach 1:
The patent implements a feedback mechanism where the frame exchange sequence counter provides information about the number of frame exchange sequences performed. This feedback is used to control retransmission behavior in aggregation frame scenarios, ensuring that even when multiple data frames are transmitted together, retransmissions are distributed across different frame exchange sequences rather than concentrated on individual terminals.
3Ease of operation
If retry count and lifetime limits are applied to each transmission data, then retransmission control is improved, but complex management of multiple parameters is required
Solution Approach 1:
The patent merges the frame exchange sequence counter with the existing retry count and lifetime management mechanisms. By integrating the sequence counter into the overall retransmission control framework, the patent manages multiple parameters (retry count, lifetime, and frame exchange sequence counter) in a unified manner, reducing the operational complexity compared to managing separate independent control mechanisms.
Data Source
AI summary
A wireless communication apparatus is disclosed. A transmitting device transmits a first aggregation frame in which first transmission data frames are aggregated. A measuring device measures a number value of retransmission of each of the first transmission data frames. A storage stores a limiting value of the number value of retransmission. A determination device determines whether the number value of retransmission of each of the first transmission data frames exceeds the limiting value. A transmission buffer buffers the first transmission data frames for which it is determined that the number value of retransmission does not exceed the limiting value, and discards the first transmission data frames for which it is determined that the number value of retransmission exceeds the limiting value, of the first transmission data frames. A retransmitting device retransmits the first aggregation frame in which the first transmission data frames buffered in the transmission buffer are aggregated.