Title :
Optimal Transmission Power for Single- and Multi-Hop Links in Wireless Packet Networks With ARQ Capability
Author :
Seo, Hanbyul ; Lee, Byeong Gi
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ.
fDate :
5/1/2007 12:00:00 AM
Abstract :
In this paper, we rigorously investigate the energy minimization problem for wireless packet networks with automatic repeat request (ARQ) capability. We first formulate the problem for the single-hop case under constrained packet delay and reliability and derive the necessary and sufficient condition for the optimal transmission power at each ARQ stage. We formulate a global rule of optimal transmission power control that achieves optimality regardless of the delay and reliability constraints. Then we extend it to encompass the multi-hop case by dividing the overall problem into two subproblems-energy determination for each ARQ stage and energy distribution among the constituent nodes. We show that the optimality condition established for the single-hop case is also applicable to solve the energy determination problem in the multi-hop case, rendering an optimal solution to the energy distribution problem. Numerical examples reveal that a significant amount of energy is saved by adopting the optimal transmission power and the performance gain is strongly correlated with the decreasing property of the frame error rate
Keywords :
automatic repeat request; error statistics; packet radio networks; power control; radio links; telecommunication control; telecommunication network reliability; ARQ; automatic repeat request; constrained packet delay; frame error rate; multihop links; optimal transmission power control; reliability constraints; single-hop links; wireless packet networks; Automatic repeat request; Delay; Energy efficiency; Error correction; Interference; Power control; Spread spectrum communication; Sufficient conditions; Wireless application protocol; Wireless sensor networks; Automatic repeat request (ARQ) protocol; energy minimization; transmission power control; wireless data network;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2007.894104