Title:QoS-Adaptive Routing Protocol Design for Multi-Hop Cognitive Radio Networks Considering Multi-Link Interference
VOLUME: 1 ISSUE: 2
Author(s):Xin-Lin Huang, Gang Wang, Qing-Quan Sun and Zhuo-Ran Cai
Affiliation:Communication Research Center, Harbin Institute of Technology, Harbin 150001, P. R. China
Keywords:Routing protocol, quality of service (QoS), transmission efficiency, multi-link interference, cumulative end-to-end
delay, packet delivery ratio.
Abstract:Recently, cross-layer routing design for cognitive radio networks (CRNs) has been studied widely. However,
none of the previous literatures discuss multi-link interference (in routing protocol design), which results in queuing delay
and backoff delay. A large queuing and backoff delay will reduce the transmission efficiency of a link and increase the
cumulative end-to-end delay. In this paper, we first propose a multi-link interference model, and derive the transmission
efficiency of a link. Then, in order to improve the transmission efficiency (thus the quality of service) under multi-link
interference situation, we propose a source routing protocol based on on-demand routing and dynamic channel
assignment. The channel assignment tries to maximize the transmission efficiency of links along the selected path. Hence,
our proposed routing protocol can reduce the average cumulative end-to-end delay of all flows and increase the packet
delivery ratio.
