Wireless Mesh Relay Node Frequency Division Multiplexing
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Solution Overview
Problem
Current wireless mesh networks face limitations in range, reliability, and throughput, with existing techniques such as increasing transmission power being restricted by regulations and mesh networking offering only partial improvements.
Innovation Solution
Implementing multiple-input multiple-output (MIMO) communication, frequency division multiplexing (FDM), and time division multiplexing (TDM) in intermediary nodes, along with dual circuitry to operate as both access points and station nodes, allowing for concurrent operation on different frequencies and dynamic frequency selection based on real-time network parameters, and coherent combining of transmissions to enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If transmission power is increased to improve range, then range is improved, but regulatory limits prevent further power increase
Solution Approach 1:
The patent transitions from single-frequency communication to multi-frequency communication, adding a frequency dimension to the communication system. This allows the network to achieve extended range not by increasing power in the traditional dimension, but by utilizing multiple frequency channels simultaneously, effectively solving the range limitation imposed by regulatory power constraints.
Solution Approach 2:
The patent segments the communication spectrum into multiple frequency channels and assigns different channels to different geographic regions or network segments. This segmentation allows each segment to operate independently on optimized frequencies, achieving overall network range extension without requiring any single node to transmit at prohibited power levels.
2Reliability
If mesh networking is implemented to improve reliability, then reliability is improved, but throughput is reduced due to multi-hop routing
Solution Approach 1:
The patent introduces frequency division as an additional dimension for data flow management. By assigning different frequency channels to different hops or paths in the mesh network, the system can maintain multiple simultaneous data flows, thereby preserving throughput while achieving the reliability benefits of mesh networking through dynamic path selection.
Solution Approach 2:
The patent dynamically changes communication parameters including frequency selection, transmission power levels, and routing paths based on real-time network conditions. This parameter optimization allows the mesh network to adapt to varying traffic loads and channel conditions, maintaining high throughput while ensuring reliable delivery through alternative paths when needed.
3Productivity
If frequency division multiplexing is used to enable concurrent communications, then throughput is improved, but interference between frequency channels may increase
Solution Approach 1:
The patent implements feedback mechanisms where nodes continuously monitor channel quality, interference levels, and transmission success rates. Based on this feedback, the system dynamically adjusts frequency assignments, power levels, and routing decisions to minimize interference while maximizing throughput, ensuring optimal performance in varying radio conditions.
Solution Approach 2:
The patent applies different frequency channels and transmission parameters to different geographic locations and network segments based on local conditions. This localized optimization allows each region to use the most appropriate frequency and power settings for its specific environment, reducing co-channel interference while maintaining high throughput in each local area.
Data Source
AI summary
Disclosed are methods and apparatuses related to the routing of communications in a wireless mesh network so as to provide improved range, reliability and/or throughput. At least some aspects of the techniques and apparatuses can be implemented in an intermediary node (relay node) on a wireless mesh network. The relay node and other devices on the wireless network may implement a form of multiple-input multiple-output (MIMO) communication, such as multi-user MIMO (MU-MIMO). The devices on the network can communicate in accordance with IEEE standard 802.11.