TY - GEN
T1 - Efficient recovery algorithms for wireless mesh networks with cognitive radios
AU - Hincapie, Roberto
AU - Zhang, Li
AU - Tang, Jian
AU - Xue, Guoliang
AU - Wolff, Richard S.
AU - Bustamante, Roberto
PY - 2009
Y1 - 2009
N2 - Cognitive radios allow unlicensed wireless users to access channels that are in the licensed spectrum bands. However, in a wireless network with cognitive radios, when a licensed user becomes active on a channel in a certain area, nodes and links that were using that channel must release it, which will cause traffic failures. Simple and effective recovery schemes are needed to re-allocate available resources for the failed traffic. In this paper, we study the failure recovery in wireless mesh networks with cognitive radios. We formally formulate the corresponding problems as integer linear programming problems. By solving them, we can obtain optimal solutions. Moreover, an efficient distributed heuristic algorithm is presented for fast recovery. Simulation results show that the performance given by our distributed algorithm is close to that of the optimal solutions.
AB - Cognitive radios allow unlicensed wireless users to access channels that are in the licensed spectrum bands. However, in a wireless network with cognitive radios, when a licensed user becomes active on a channel in a certain area, nodes and links that were using that channel must release it, which will cause traffic failures. Simple and effective recovery schemes are needed to re-allocate available resources for the failed traffic. In this paper, we study the failure recovery in wireless mesh networks with cognitive radios. We formally formulate the corresponding problems as integer linear programming problems. By solving them, we can obtain optimal solutions. Moreover, an efficient distributed heuristic algorithm is presented for fast recovery. Simulation results show that the performance given by our distributed algorithm is close to that of the optimal solutions.
KW - Cognitive radio
KW - Mathematical programming
KW - Recovery
KW - Wireless mesh network
UR - http://www.scopus.com/inward/record.url?scp=70449465372&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=70449465372&partnerID=8YFLogxK
U2 - 10.1109/ICC.2009.5198977
DO - 10.1109/ICC.2009.5198977
M3 - Conference contribution
AN - SCOPUS:70449465372
SN - 9781424434350
T3 - IEEE International Conference on Communications
BT - Proceedings - 2009 IEEE International Conference on Communications, ICC 2009
T2 - 2009 IEEE International Conference on Communications, ICC 2009
Y2 - 14 June 2009 through 18 June 2009
ER -