Adaptive Node Role Switching in Wireless Mesh Networks
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Solution Overview
Problem
Current wireless communication networks are limited in their ability to maintain connectivity as network topology changes, particularly in military and broadband applications, where a single mode of operation (PMP or mesh) is required, and there is a need for adaptive protocols to manage dynamic changes in node roles and network structure.
Innovation Solution
The method involves configuring nodes to operate using either ad hoc or point-to-multipoint protocols, allowing them to dynamically change roles between mesh and PMP modes to maintain optimal connectivity, with a centralized or distributed algorithm determining the appropriate protocol for each node based on network topology changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single operating mode (PMP or mesh) is used in wireless networks, then the network operation is simplified and standardized, but the network cannot adapt to dynamic topology changes and maintain connectivity when nodes move
Solution Approach 1:
The patent implements dynamic role assignment where nodes can change their operational mode (PMP base station, PMP subscriber station, or mesh node) based on real-time network topology. This allows the network to adapt to mobile scenarios while maintaining standardized protocols within each role, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent enables nodes to perform multiple functions by supporting three different operational modes within a single standardized framework. Nodes can dynamically switch between PMP base station, PMP subscriber station, and mesh node roles, providing universal adaptability without requiring multiple separate systems.
2Reliability
If nodes dynamically change roles between PMP and mesh modes, then network connectivity is maintained during topology changes, but the complexity of managing multiple protocols increases
Solution Approach 1:
The patent employs a distributed algorithm where nodes exchange capability information and topology data to dynamically determine optimal role assignments. This feedback mechanism enables automatic adaptation to topology changes while maintaining connectivity, reducing the perceived complexity through decentralized decision-making.
Solution Approach 2:
The patent enables nodes to autonomously determine their own roles based on local topology information and capability exchanges with neighboring nodes. This self-service approach allows dynamic role assignment without requiring centralized control, simplifying the management of multiple operational modes.
3Productivity
If PMP protocol is used for efficient network capacity utilization, then network efficiency is improved, but connectivity cannot be maintained when subscriber stations move outside base station range
Solution Approach 1:
The patent implements dynamic role transitions where subscriber stations can become mesh nodes when moving outside PMP base station range. This maintains data forwarding capability while preserving the efficient PMP protocol for nodes within range, balancing productivity and reliability.
Solution Approach 2:
The patent segments the network into multiple operational zones where different protocols are optimally applied. PMP protocol serves nodes within base station range for efficient capacity utilization, while mesh protocol handles nodes outside range for extended connectivity coverage.
Data Source
AI summary
A process and system for enhancing connectivity among nodes of a wireless communications network by adapting to changes in the network topology. Nodes of the network are configured to operate according to either (i) an ad hoc protocol wherein a given node assumes a role of a mesh node capable of connecting with other like-configured nodes, or (ii) a point-to-multipoint protocol wherein the given node assumes a role of either a base station, or a subscriber station being served by another node which is assuming the role of a base station. A determination is made as to whether each node should operate according to the ad hoc protocol or the point-to-multipoint protocol, in order to maintain an optimum state of connectivity among all nodes of the network. The determined operating protocol is then implemented for each node.