A Multihop Rendezvous Protocol for Cognitive Radio-based Emergency Response Network

TL;DR

This letter proposes a novel Multihop Dual Modular Clock Algorithm (M-DMCA) for efficient node discovery in cognitive radio-based emergency response networks and achieves a 24% reduction in rendezvous time compared to the multihop Extended Modular Clock Algorithm (EMCA), outperforming existing rendezvous protocols.

Abstract

This letter proposes a novel Multihop Dual Modular Clock Algorithm (M-DMCA) for efficient node discovery in cognitive radio-based emergency response networks. M-DMCA supports dual-channel selection per timeslot and incorporates a three-way handshake mechanism to significantly reduce rendezvous time. Performance evaluation under a worst-case scenario with 20 nodes, asymmetric channel sets of size 20, channel similarity index (m) as 2, and high primary radio activity shows that M-DMCA achieves a 24% reduction in rendezvous time compared to the multihop Extended Modular Clock Algorithm (EMCA), outperforming existing rendezvous protocols.

Figures (12)

• Figure 1: Example of CR based emergency response network
• Figure 2: Distributed Clock Architecture and timeslot duration
• Figure 3: Two-way handshake (2-WH)
• Figure 4: Three-way handshake (3-WH)
• Figure 5: Symmetric 10-CH with 0%PR (a) 2-WH vs (b) 3-WH