Approximate Optimal Power Allocation Scheme for Wireless Ad hoe Networks in Rayleigh Fading Channels

In this paper, a distributed power allocation scheme for mobile ad hoc networks in Rayleigh fast fading environments is proposed. With fluctuated SINR, outage probability is introduced as a QoS parameter. An optimization model is formulated to minimize total transmit powers with constraint conditions that outage probability of each link should be satisfied. A closedform near optimal solution to the model is presented based on the exploration of power ratio factor at the boundary of system capacity. The solution is implemented in the networks by a distributed power allocation scheme. In terms of the scheme, each link can determine its power ratio factor independently. The inequity problem of the power allocation algorithms in incremental fashion is avoided. Meanwhile the scheme is more timesaving than those schemes in iterative manner. By performance evaluation, we verify our analysis on the optimization model and validate a better result of our scheme in comparison with the counterpart. That is, a larger system capacity is admissible by our method.

[1]  Zhisheng Niu,et al.  Uplink capacity optimization by power allocation for multimedia CDMA networks with imperfect power control , 2003, IEEE J. Sel. Areas Commun..

[2]  Aditya Dua.  Power controlled random access , 2004, 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577).

[3]  Roy D. Yates,et al.  Constrained power control , 1994, Wirel. Pers. Commun..

[4]  Jie Sun,et al.  Channel access and power control algorithms with QoS for CDMA based wireless ad-hoc networks , 2003, 14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications, 2003. PIMRC 2003..

[5]  Gerard J. Foschini,et al.  A simple distributed autonomous power control algorithm and its convergence , 1993 .

[6]  Marwan Krunz,et al.  A distributed transmission power control protocol for mobile ad hoc networks , 2004, IEEE Transactions on Mobile Computing.

[7]  Gregory J. Pottie,et al.  Channel access algorithms with active link protection for wireless communication networks with power control , 2000, TNET.

[8]  Tamer A. ElBatt,et al.  Joint scheduling and power control for wireless ad hoc networks , 2002, IEEE Transactions on Wireless Communications.

[9]  Peter W. Glynn,et al.  Distribute d power control for time varying wireless networks: Optimality and convergence , 2003 .

[10]  Anthony Ephremides,et al.  Joint scheduling and power control for wireless ad hoc networks , 2004, IEEE Trans. Wirel. Commun..

[11]  Vaduvur Bharghavan,et al.  A power controlled multiple access protocol for wireless packet networks , 2001, Proceedings IEEE INFOCOM 2001. Conference on Computer Communications. Twentieth Annual Joint Conference of the IEEE Computer and Communications Society (Cat. No.01CH37213).

[12]  I. Rubin,et al.  Distributed power controlled medium access control for ad-hoc wireless networks , 2003, 2002 14th International Conference on Ion Implantation Technology Proceedings (IEEE Cat. No.02EX505).

[13]  Elvino S. Sousa,et al.  Distributed resource allocation for DS-CDMA-based multimedia ad hoc wireless LANs , 1999, IEEE J. Sel. Areas Commun..