Title :
A utility-based power-control scheme in wireless cellular systems
Author :
Xiao, Mingbo ; Shroff, Ness B. ; Chong, Edwin K P
Author_Institution :
Purdue Univ., West Lafayette, IN, USA
fDate :
4/1/2003 12:00:00 AM
Abstract :
Distributed power-control algorithms for systems with hard signal-to-interference ratio (SIR) constraints may diverge when infeasibility arises. We present a power-control framework called utility-based power control (UBPC) by reformulating the problem using a softened SIR requirement (utility) and adding a penalty on power consumption (cost). Under this framework, the goal is to maximize the net utility, defined as utility minus cost. Although UBPC is still noncooperative and distributed in nature, some degree of cooperation emerges: a user will automatically decrease its target SIR (and may even turn off transmission) when it senses that traffic congestion is building up. This framework enables us to improve system convergence and to satisfy heterogeneous service requirements (such as delay and bit error rate) for integrated networks with both voice users and data users. Fairness, adaptiveness, and a high degree of flexibility can be achieved by properly tuning parameters in UBPC.
Keywords :
cellular radio; distributed control; error statistics; integrated voice/data communication; power control; radiofrequency interference; telecommunication control; telecommunication traffic; SIR; bit error rate; cost; data users; delay; distributed power-control algorithms; fairness; heterogeneous service requirements; integrated networks; power consumption; signal-to-interference ratio; softened SIR requirement; system convergence; traffic congestion; utility-based power-control; voice users; wireless cellular systems; Costs; Distributed algorithms; Energy consumption; Power control; Quality of service; Resource management; Robust stability; Telecommunication traffic; Wireless cellular systems; Wireless networks;
Journal_Title :
Networking, IEEE/ACM Transactions on
DOI :
10.1109/TNET.2003.810314