Multi-radio mesh network link switching module
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Solution Overview
Problem
Conventional multi-radio mesh networks are excessively dependent on time-scale usage reports and fail to efficiently manage variations in wireless link states, leading to data loss when a selected link experiences issues.
Innovation Solution
A multi-radio mesh network system and method that switches user data to an available alternative wireless link based on link state, utilizing a wireless access switching module to change frame structures and select optimal paths, ensuring continuous data transmission by re-routing through available links.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If constant periodic monitoring of wireless resource state is performed to select optimal wireless resources for MRTD, then wireless resource selection accuracy is improved, but system complexity and processing overhead increase
Solution Approach 1:
The patent pre-calculates and stores multiple alternative routes with different time scales before actual data transmission is needed. When a link fails, the system can immediately switch to a pre-computed alternative route without performing real-time monitoring and calculation, thus resolving the contradiction between selection accuracy and system complexity.
2Reliability
If user data is retained on standby in the queue when transmission link fails, then data reliability is improved, but data loss increases due to excessive retention time
Solution Approach 1:
The patent dynamically adjusts the retention time of user data in queues based on the state of wireless links and alternative route availability. When alternative routes are available, retention time is reduced; when no alternatives exist, retention time is extended. This dynamic adjustment resolves the contradiction between maintaining data reliability and minimizing data loss due to excessive retention.
3Productivity
If multiple wireless links are used for simultaneous transmission, then throughput is improved, but signal interference increases
Solution Approach 1:
The patent segments the wireless network into multiple interfaces, each operating on mutually orthogonal channels. By allocating different orthogonal channels to different interfaces, the system enables simultaneous transmission on multiple links without signal interference, thus resolving the contradiction between improving throughput and reducing interference.
Data Source
AI summary
In a multi-radio mesh network system supporting at least two different wireless communication standards and a method of controlling the same, a wireless access switching module determines whether user data en-queued in the queue of a first wireless link and retained on standby cannot be transmitted. The wireless access switching module switches the user data, en-queued in the queue of the first wireless link and retained on standby, to an available second wireless link. The wireless access switching module changes a frame structure according to different wireless access techniques. When access is possible through the second wireless link, a forwarder searches for a local neighbor directly connected to a transmitting node and a receiving node, and forwards the user data. According to the invention, and in contrast to conventional techniques, available multi-wireless resources can be used more efficiently, flexibly and optimally up to the last moment, thereby reducing re-transmission and packet drop. Thus, each hop supports fast data forwarding so as to improve network performance.