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Enhancing coverage and reducing power consumption in peer-to-peer networks through airborne relaying

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

Original languageEnglish
Title of host publicationIEEE 65th Vehicular Technology Conference 2007-Spring, Dublin
Publisher or commissioning bodyInstitute of Electrical and Electronics Engineers (IEEE)
Pages954 - 958
Number of pages5
ISBN (Print)1424402654, 1424402662
StatePublished - 22 Apr 2007
Event65th Vehicular Technology Conference 2007 (VTC 2007-Spring) - Dublin, Ireland

Publication series

ISSN (Print)15502252


Conference65th Vehicular Technology Conference 2007 (VTC 2007-Spring)
Period1/04/07 → …


Over the years peer-to-peer (P2P) multi-hop relays have been studied for mobile ad-hoc networks (MANETs) to overcome poor signal coverage and to improve connectivity. However, for an urban environment, particularly with a sparse mobile distribution, a ground relay is not able to achieve significant benefits, mainly due to the extremely high pathloss and shadowing encountered. Dedicated airborne relay nodes, at a height of hundreds or thousands of meters, can provide much better coverage, and hence improve the connectivity, decrease the number of hops, reduce the power consumption, and support co-operative relays when integrated into mobile ad-hoc networks. An air node can also act as the sink for current wireless sensor networks (WSNs). Despite these potential advantages, the coverage from an air node located directly above an urban operating environment has not been adequately investigated in the literature. This paper compares the advantages of airborne relaying compared to more conventional peer-to-peer mobile relays. Three channel types are considered, i.e. line-of-sight (LoS), obstructed LoS (OLoS), and non-LoS (NLoS), each with their own likelihood, pathloss, and shadowing models. The practical gain pattern of a hemispheric antenna, or a directional antenna, is also carefully considered for the air node. Comparisons of the air-to-ground (A2G) channel and the mobile P2P channel demonstrate that airborne relays can enhance the coverage and reduce the power consumption significantly.

Additional information

Rose publication type: Conference contribution Additional information: With accompanying conference presentation Terms of use: Copyright © 2007 IEEE. Reprinted from IEEE 65th Vehicular Technology Conference Spring 2007. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of the University of Bristol's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to By choosing to view this document, you agree to all provisions of the copyright laws protecting it.

    Research areas

  • coverage, power consumption, connectivity, airborne relaying, peer-to-peer, directional antenna


65th Vehicular Technology Conference 2007 (VTC 2007-Spring)

Duration1 Apr 2007 → …

Event: Conference

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