Wireless Mesh Route Construction Using Reception Power Metrics
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Solution Overview
Problem
Existing wireless mesh network route construction methods using IEEE 802.11s are not optimal, especially when communication devices with different standards are mixed, as they rely on theoretical maximum communication speeds that do not account for varying radio wave environments, leading to suboptimal performance, especially when devices move or communication speeds need to be adjusted.
Innovation Solution
The method calculates a metric value based on reception power instead of theoretical maximum communication speed, using a definition table to associate reception power with metric values, allowing for dynamic and optimal route construction in wireless mesh networks, even when devices are in motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a metric value is determined based on theoretical maximum communication speed, then compatibility between communication devices with different standards is improved, but route construction optimality deteriorates
Solution Approach 1:
The patent changes the parameter basis for metric calculation from theoretical maximum communication speed to actual reception power measurements. This allows the metric to dynamically reflect real communication conditions while maintaining compatibility across different IEEE 802.11 standards (a, ac, ax) through universal reception power measurement, thereby resolving the contradiction between compatibility and optimality
Solution Approach 2:
The patent introduces feedback mechanisms where reception power is continuously measured and used to update metric values. This feedback loop enables the routing protocol to adapt to changing radio wave environments and actual communication conditions, improving route construction optimality without sacrificing compatibility
2Loss of time
If route construction is performed before communication starts, then routing decisions are made in advance, but optimal transmission rate cannot be achieved due to unknown actual communication conditions
Solution Approach 1:
The patent performs preliminary reception power measurements during the route construction phase, before actual data transmission begins. This preliminary action provides initial metric values for route selection while allowing subsequent adjustments based on actual communication performance, balancing advance routing decisions with adaptive optimization
Solution Approach 2:
The patent makes the metric value dynamic by continuously updating it based on measured reception power during communication. This allows the routing protocol to adapt routes in real-time according to actual communication conditions, resolving the contradiction between advance route construction and optimal transmission rate achievement
3Device complexity
If a fixed metric calculation method based on communication standards is used, then implementation is simplified, but adaptability to varying radio wave environments deteriorates
Solution Approach 1:
The patent enables the system to self-adjust metric values by automatically measuring reception power and updating metrics without complex external configuration. This self-service approach maintains implementation simplicity while significantly improving adaptability to varying radio wave environments through automatic environmental assessment
Data Source
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AI summary
To provide a communication device provided with: a storing part that stores a definition table where a reception power and a metric value are associated with each other, and a cumulative metric value; a receiving part that receives a broadcast signal transmitted from another communication device; a calculating part that acquires a metric value corresponding to a reception power of the broadcast signal received by the receiving part from the definition table, and then calculates a cumulative metric value based on the acquired metric value and a metric value included in the received broadcast signal; and a determining part that updates a cumulative metric value stored in the storing part to the calculated cumulative metric value if the calculated cumulative metric value is smaller than the cumulative metric value stored in the storing part, and determines the other communication device transmitting the broadcast signal of the calculated cumulative metric value as a route construction target in the wireless mesh network.