TY - GEN
T1 - Two-tiered constrained relay node placement in wireless sensor networks
T2 - 7th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks, SECON 2010
AU - Yang, Dejun
AU - Misra, Satyajayant
AU - Fang, Xi
AU - Xue, Guoliang
AU - Zhang, Junshan
PY - 2010
Y1 - 2010
N2 - In a wireless sensor network, short range multihop transmissions are preferred to prolong the network lifetime due to super-linear nature of energy consumption with communication distance. It has been proposed to deploy some relay nodes such that the sensors can transmit the sensed data to a nearby relay node, which in turn delivers the data to the base stations. In general, the relay node placement problems aim to meet certain connectivity and/or survivability requirements of the network by deploying a minimum number of relay nodes. In this paper, we study two-tiered constrained relay node placement problems, where the relay nodes can only be placed at some pre-specified candidate locations. To meet the connectivity requirement, we study the connected single-cover problem where each sensor node is covered by a relay node (to whom the sensor node can transmit data), and the relay nodes form a connected network with the base stations. To meet the survivability requirement, we study the 2-connected double-cover problem where each sensor node is covered by at least two relay nodes, and the relay nodes form a 2-connected network with the base stations. We focus on the computational complexities of the problems, and propose novel polynomial time approximation algorithms for these problems. For the connected single-cover problem, our algorithms have O(1) approximation ratios. For the 2-connected double-cover problem, our algorithms have O(1) approximation ratios for practical settings and O(ln n) approximation ratios for arbitrary settings. Experimental results show that the number of relay nodes used by our algorithms is no more than twice of the number of relay nodes used in an optimal solution.
AB - In a wireless sensor network, short range multihop transmissions are preferred to prolong the network lifetime due to super-linear nature of energy consumption with communication distance. It has been proposed to deploy some relay nodes such that the sensors can transmit the sensed data to a nearby relay node, which in turn delivers the data to the base stations. In general, the relay node placement problems aim to meet certain connectivity and/or survivability requirements of the network by deploying a minimum number of relay nodes. In this paper, we study two-tiered constrained relay node placement problems, where the relay nodes can only be placed at some pre-specified candidate locations. To meet the connectivity requirement, we study the connected single-cover problem where each sensor node is covered by a relay node (to whom the sensor node can transmit data), and the relay nodes form a connected network with the base stations. To meet the survivability requirement, we study the 2-connected double-cover problem where each sensor node is covered by at least two relay nodes, and the relay nodes form a 2-connected network with the base stations. We focus on the computational complexities of the problems, and propose novel polynomial time approximation algorithms for these problems. For the connected single-cover problem, our algorithms have O(1) approximation ratios. For the 2-connected double-cover problem, our algorithms have O(1) approximation ratios for practical settings and O(ln n) approximation ratios for arbitrary settings. Experimental results show that the number of relay nodes used by our algorithms is no more than twice of the number of relay nodes used in an optimal solution.
KW - Connectivity and survivability
KW - Relay node placement
KW - Wireless sensor networks
UR - http://www.scopus.com/inward/record.url?scp=77955115187&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77955115187&partnerID=8YFLogxK
U2 - 10.1109/SECON.2010.5508241
DO - 10.1109/SECON.2010.5508241
M3 - Conference contribution
AN - SCOPUS:77955115187
SN - 9781424471515
T3 - SECON 2010 - 2010 7th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks
BT - SECON 2010 - 2010 7th Annual IEEE Communications Society Conference on Sensor, Mesh and Ad Hoc Communications and Networks
Y2 - 21 June 2010 through 25 June 2010
ER -