Negotiating Packet Transmission Duration to Mitigate Wireless Interference
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Solution Overview
Problem
In TDMA-based wireless communication systems, especially those using ISM radio bands like Bluetooth, BLE, and BLR, overlapping frequency bands cause interference due to the lack of collision avoidance mechanisms, leading to degraded transmission and reception performance.
Innovation Solution
A communications apparatus with multiple radio modules negotiates a maximum and preferred packet transmission duration to mitigate interference by activating a protection scheme, such as sending a clear-to-send message to mute other devices during packet transmission, thereby optimizing packet transmission duration and reducing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If TDMA-based wireless communication services operate in overlapping frequency bands without collision avoidance mechanisms, then device complexity is reduced, but transmission performance and reliability degrade due to interference and packet collisions
Solution Approach 1:
The patent applies preliminary action by determining the maximum packet transmission duration before actual packet transmission occurs. The communication apparatus negotiates and establishes the maximum duration parameter in advance, which then guides the transmission process to avoid collisions without requiring complex real-time collision avoidance mechanisms.
2Productivity
If packet transmission duration is extended to improve data throughput, then productivity increases, but the probability of packet collisions and interference increases
Solution Approach 1:
The patent applies parameter changes by dynamically determining and negotiating the maximum packet transmission duration parameter. Instead of using fixed transmission durations, the system adjusts this parameter based on channel conditions and interference levels, optimizing the balance between throughput and collision probability.
3Reliability
If maximum packet transmission duration is limited to reduce collisions, then reliability improves, but transmission efficiency and productivity may decrease
Solution Approach 1:
The patent applies dynamics by making the maximum packet transmission duration a negotiable and adaptable parameter rather than a fixed value. The communication apparatuses exchange information about their maximum durations and negotiate preferred durations, allowing the system to dynamically adjust transmission parameters to achieve both reliability and efficiency.
Data Source
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AI summary
A communications apparatus includes a radio module providing a predetermined wireless communications service and communicating with a peer communications apparatus in a predetermined frequency band in compliance with a predetermined protocol. The radio module includes a processor. The processor determines a maximum packet transmission duration, transmits information regarding the maximum packet transmission duration to the peer communications apparatus and negotiates a preferred packet transmission duration with the peer communications apparatus.