Receiver-Controlled Multi-Node Cooperation

Liang Ye^1,2, Yue Li¹, Xue-Jun Sha¹, Esko Alasaarela²

(1. Communication Research Center, Harbin Institute of Technology, Harbin 150001, China; 2. Dept. of Electrical Engineering, University of Oulu, Oulu 90570, Finland)



Abstract:

Since wireless links in Ad hoc networks are more fragile than those in traditional wireless networks due to route flapping, multi-node cooperation plays an important role in ensuring the quality of service (QoS). Based on the authors¡¯ previous work, this paper proposes a receiver-controlled multi-node cooperation routing protocol, known as AODV-RCC. In this protocol, nodes form a cooperation group based on signal power. In a cooperation group, signal power between a partner and a transmitter, as well as signal power between the partner and the receiver, must be larger than the signal power between the transmitter and the receiver. Otherwise, the transmission will not benefit from cooperation. To avoid collision or congestion, each cooperation group only contains one partner. This partner offers both data and ACK cooperative retransmission. Its retransmission time should be shorter than the internal retry time of the transmitter¡¯s MAC layer, because it is better for the partner to retransmit firstly, as it offers a more reliable cooperative link. In AODV-RCC, it is the receiver that chooses the partner, because the link between the partner and the receiver is the most important. According to our simulation results, AODV-RCC shortens the end-to-end delay and increases the packet delivery ratio.

Key words:  multi-node cooperation  receiver-controlled  routing protocol  Ad hoc network

DOI£º10.11916/j.issn.1005-9113.2014.02.002

Clc Number:TN929.5

Fund: