MANET Virtual Buffer Zones for Faster Route Recovery
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Solution Overview
Problem
Existing routing protocols in Mobile Ad-hoc Networks (MANETs) suffer from high routing overhead, long route discovery times, and high packet loss due to frequent route changes, particularly in dynamic network topologies.
Innovation Solution
A system using a Virtual Buffer Zone Manager (VBZM) that maintains virtual buffer zones around each node, adjusting their size based on network conditions, and a modified AODV routing protocol with a VBZU message to optimize route discovery and congestion control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If reactive routing protocols (AODV, DSR) are used to reduce routing overhead, then routing overhead is reduced, but route discovery time increases
Solution Approach 1:
The patent maintains routing tables proactively at each node, pre-computing and storing routing information before it is needed. This allows the system to respond quickly to topology changes without initiating full route discovery processes, thus reducing route discovery time while maintaining controlled routing overhead through selective table maintenance.
Solution Approach 2:
The routing tables are dynamically updated based on topology change notifications (TCN) and distance vector information. The system transitions from static routing tables to dynamic, adaptive tables that automatically adjust to network conditions, resolving the contradiction between proactive maintenance and reactive updates.
2Loss of time
If proactive routing protocols are used to reduce route discovery time, then route discovery time is reduced, but routing overhead increases
Solution Approach 1:
Instead of maintaining routing information for all nodes uniformly across the network, the patent implements routing tables with selective information storage at each node. Each node maintains routing tables containing only relevant routing information for its local context and neighboring areas, reducing overall routing overhead while maintaining fast local route discovery.
Solution Approach 2:
The routing system is segmented into distributed routing tables at each node rather than a centralized routing database. This segmentation allows each node to independently manage its own routing information, reducing the total amount of routing overhead messages needed while maintaining quick route discovery capabilities.
3Measurement precision
If routing tables are updated frequently to adapt to topology changes, then routing accuracy is improved, but packet loss increases
Solution Approach 1:
The patent uses distance vector information and topology change notifications to predict and prepare for routing changes before they fully impact data transmission. By cushioning against topology changes through proactive routing table updates and alternative route maintenance, the system maintains routing accuracy while preventing packet loss during transitions.
Solution Approach 2:
The system implements feedback mechanisms where nodes send topology change notifications and distance vector information to their neighbors. This feedback loop allows routing tables to be updated accurately based on real network conditions while controlling the frequency and impact of updates, thereby maintaining routing accuracy without excessive packet loss.
Data Source
AI summary
The present disclosure relates to a mobile ad-hoc network (MANET), specifically to the management of routing protocols, and more particularly to a system and method to reduce rerouting time in MANET using virtual buffer zone technique. The system includes a plurality of nodes, each having a virtual buffer zone, which is a buffer area around the node. When a node detects a change in the network topology, it broadcasts a message to all the nodes within its virtual buffer zone. The nodes in the buffer zone update their routing tables accordingly, which reduces the rerouting time in the network.