DELAR: Device/energy/load aware relaying in heterogenous wireless ad hoc networks

Wei Lia, Yanchao Zhang, Wenjing Lou, Yuguang Fang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Scopus citations


Energy conservation is of great importance for mobile ad hoc networks in which most nodes are equipped with limited energy sources. In this paper, we propose a novel device/energy/load aware relaying scheme (DELAR) for heterogeneous mobile ad hoc networks, where some nodes, called P-nodes, are powered by powerful external or renewable energy sources. In DELAR the heterogeneity of nodal energy capabilities or device types, nodal residue energy information, and nodal load status are nicely incorporated into established routing protocols with the aim of prolonging the network lifetime as much as possible. In addition, we also resolve the rather challenging issue of how to support the MAC-layer acknowledgements in the presence of unidirectional links caused by asymmetrical power capabilities. Unlike other schemes that resort to outband channels or higher layer solutions when facing this problem, we propose an Asymmetric MAC (A-MAC) as an elegant solution. Taking full advantage of P-nodes, DELAR can significantly prolong the network lifetime; meanwhile, it strikes a good balance between power efficiency and the overall system performance. Moreover, our scheme operates in a distributed manner and is easy to implement. Detailed simulation study is carried out to justify and validate the effectiveness and efficiency of our scheme.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE Military Communications Conference MILCOM
Number of pages7
StatePublished - 2004
Externally publishedYes
EventMILCOM 2004 - 2004 IEEE Military Communications Conference - Monterey, CA, United States
Duration: Oct 31 2004Nov 3 2004


OtherMILCOM 2004 - 2004 IEEE Military Communications Conference
Country/TerritoryUnited States
CityMonterey, CA

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Electrical and Electronic Engineering


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