Achieving scalable capacity in wireless networks with adaptive power control

Wang Hei Ho, Soung Chang Liew

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

5 Citations (Scopus)


The seminar work of Gupta and Kumar [1] showed that multi-hop wireless networks with capacity scalable with the number of nodes, n, are achievable in theory. The transport capacity scales as Θ(√n). while the capacity scales as η(n). A subsequent study [2], on the other hand, showed that the capacity of IEEE 802.11 networks does not scale with n due to its carrier-sensing mechanism. This prior work, however, has not considered the use of power control. The main contributions of this paper are three-folds: 1) we provide an analytical framework for deriving the design requirements of adaptive power control strategies; 2) we demonstrate that 802.11 networks are scalable with power control; 3) however, an enhanced MAC protocol called Selective Disregard of NAVs (SDN) can achieve substantially higher capacity with an adaptive power control scheme; in particular, adaptive power control allows SDN to achieve capacity within 75% of the theoretical optimal capacity of infrastructure-mode wireless networks. A reason why adaptive power control works well is that it takes into consideration the fundamental mutual-interference relationships between links in the vicinity of each other, and adjust their relative transmit powers to reduce these interferences to a large extent that is possible theoretically.
Original languageEnglish
Title of host publicationProceedings - The IEEE Conference on Local Computer Networks - 30th Anniversary, LCN 2005
Number of pages9
Publication statusPublished - 1 Dec 2005
Externally publishedYes
EventIEEE Conference on Local Computer Networks - 30th Anniversary, LCN 2005 - Sydney, Australia
Duration: 15 Nov 200517 Nov 2005


ConferenceIEEE Conference on Local Computer Networks - 30th Anniversary, LCN 2005

ASJC Scopus subject areas

  • Engineering(all)

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