CoopGeo: A Beaconless Geographic Cross-Layer Protocol for Cooperative Wireless Ad Hoc Networks
Teck Aguilar, Syue-Ju Syue, Vincent Gauthier, Hossam Afifi and, Chin-Liang Wang

TL;DR
CoopGeo is a novel cross-layer protocol for cooperative wireless ad hoc networks that improves relay and forwarder selection, leading to better performance over existing protocols.
Contribution
It introduces a joint MAC-network and MAC-PHY cross-layer framework for relay and forwarder selection in cooperative ad hoc networks.
Findings
Outperforms BOSS in packet error rate
Reduces transmission error probability
Increases saturated throughput
Abstract
Cooperative relaying has been proposed as a promising transmission technique that effectively creates spatial diversity through the cooperation among spatially distributed nodes. However, to achieve efficient communications while gaining full benefits from cooperation, more interactions at higher protocol layers, particularly the MAC (Medium Access Control) and network layers, are vitally required. This is ignored in most existing articles that mainly focus on physical (PHY)-layer relaying techniques. In this paper, we propose a novel cross-layer framework involving two levels of joint design---a MAC-network cross-layer design for forwarder selection (or termed routing) and a MAC-PHY for relay selection---over symbol-wise varying channels. Based on location knowledge and contention processes, the proposed cross-layer protocol, CoopGeo, aims at providing an efficient, distributed…
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