DocumentCode :
2652094
Title :
Enhancing Coverage and Reducing Power Consumption in Peer-to-Peer Networks Through Airborne Relaying
Author :
Feng, Qixing ; McGeehan, Joe ; Nix, Andrew R.
Author_Institution :
Centre for Commun. Res., Bristol Univ.
fYear :
2007
fDate :
22-25 April 2007
Firstpage :
954
Lastpage :
958
Abstract :
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.
Keywords :
ad hoc networks; directive antennas; mobile radio; MANET; P2P multihop relays; air-to-ground channel; airborne relaying; directional antenna; hemispheric antenna; line-of-sight; mobile ad-hoc networks; non-LoS; obstructed LoS; peer-to-peer networks; sparse mobile distribution; support cooperative relays; wireless sensor networks; Ad hoc networks; Directional antennas; Energy consumption; Line-of-sight propagation; Peer to peer computing; Protective relaying; Relays; Shadow mapping; Spread spectrum communication; Wireless sensor networks;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2007. VTC2007-Spring. IEEE 65th
Conference_Location :
Dublin
ISSN :
1550-2252
Print_ISBN :
1-4244-0266-2
Type :
conf
DOI :
10.1109/VETECS.2007.205
Filename :
4212633
Link To Document :
بازگشت