Optimal common transmit power in ad hoc wireless networks

Power conservation is one of the most important issues for ad hoc wireless networks where nodes are likely to rely on limited battery power. Transmitting at unnecessarily high power not only reduces the lifetime of the nodes and the network, but also introduces excessive interference. It is in the network designer's best interest to have each node transmit at the lowest possible power while preserving network connectivity. In this paper, we investigate the optimal common transmit power, defined as the minimum transmit power used by all nodes necessary to guarantee network connectivity. In particular, we show that for a given route BER and node spatial density, there exists a global optimal data rate at which the transmit power can be globally minimized. Moreover, we also show that there exists a critical node spatial density at which the optimal transmit power is the minimum possible for a given data rate and a given route BER.

[1]  Gianluigi Ferrari,et al.  Performance of ad hoc wireless networks with Aloha and PR-CSMA MAC protocol , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).

[2]  Gianluigi Ferrari,et al.  Route reservation in ad hoc networks: is it a good idea? , 2005, IEEE Wireless Communications and Networking Conference, 2005.

[3]  G. Ferrari,et al.  Is the number of neighbors in ad hoc wireless networks a good indicator of connectivity? , 2004, International Zurich Seminar on Communications, 2004.

[4]  Thomas G. Robertazzi,et al.  Critical connectivity phenomena in multihop radio models , 1989, IEEE Trans. Commun..

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

[6]  P. R. Kumar,et al.  Power Control in Ad-Hoc Networks: Theory, Architecture, Algorithm and Implementation of the COMPOW Protocol , 2002 .

[7]  Jie Wu,et al.  Computation of minimal uniform transmission power in ad hoc wireless networks , 2003, 23rd International Conference on Distributed Computing Systems Workshops, 2003. Proceedings..

[8]  M. J. Riezenman,et al.  Wireless broadband in a box , 2002 .

[9]  Ian F. Akyildiz,et al.  Sensor Networks , 2002, Encyclopedia of GIS.

[10]  Kwang-Cheng Chen,et al.  Power efficient topology control in wireless ad hoc networks , 2004, 2004 IEEE Wireless Communications and Networking Conference (IEEE Cat. No.04TH8733).

[11]  S. Panichpapiboon,et al.  Sensor networks with random versus uniform topology: MAC and interference considerations , 2004, 2004 IEEE 59th Vehicular Technology Conference. VTC 2004-Spring (IEEE Cat. No.04CH37514).

[12]  Gianluigi Ferrari,et al.  Impact of mobility on the BER performance of multi-hop ad hoc wireless networks , 2004, IEEE Global Telecommunications Conference, 2004. GLOBECOM '04..

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

[14]  Norman Abramson,et al.  The Throughput of Packet Broadcasting Channels , 1977, IEEE Trans. Commun..

[15]  Ram Ramanathan,et al.  Topology control of multihop wireless networks using transmit power adjustment , 2000, Proceedings IEEE INFOCOM 2000. Conference on Computer Communications. Nineteenth Annual Joint Conference of the IEEE Computer and Communications Societies (Cat. No.00CH37064).

[16]  Srikanth V. Krishnamurthy,et al.  Distributed power control in ad-hoc wireless networks , 2001, 12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598).

[17]  Gianluigi FERRARI,et al.  Spectral Efficiency-Connectivity Tradeoff in Ad Hoc Wireless Networks , 2004 .

[18]  Christian Bettstetter,et al.  How to achieve a connected ad hoc network with homogeneous range assignment: an analytical study with consideration of border effects , 2002, 4th International Workshop on Mobile and Wireless Communications Network.