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AuthorMousavifar S.A.
AuthorKhattab T.
AuthorHasna , Mazen
Available date2022-04-26T11:06:57Z
Publication Date2010
Publication NameGLOBECOM - IEEE Global Telecommunications Conference
ResourceScopus
Identifierhttp://dx.doi.org/10.1109/GLOCOM.2010.5683480
URIhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-79551647971&doi=10.1109%2fGLOCOM.2010.5683480&partnerID=40&md5=3f95499b7835927082a545f87f27fb37
URIhttp://hdl.handle.net/10576/30551
AbstractIn a wireless sensor network with relaying capability, intermediate relay nodes are with limited energy budget. To maximize lifetime of relay nodes, selective relay strategies, requiring full channel state information (CSI), are used to utilizes the best relaying channel. Pilot overhead on relay nodes lifetime is reduced by assuming pilot transmission from destination instead of relay nodes. This is only valid if channel reciprocity is assumed. It is evident that channel reciprocity is not valid for low cost simple transceivers, such as sensor node transceivers. In this paper a novel sequential random (SR) selective cooperative relay strategy is proposed in amplify and forward (AF) relay networks for applications with non reciprocal links. The outage probability of SR strategy is derived and its average lifetime, average number of pilot signals per transmitted message, and average transmit energy per message are simulated. SR strategy uses less number of pilots than selective cooperative relay strategies (S-CRSs). A dynamic transmit power threshold is adopted for the proposed SR strategy to improve its performances. In contrast to S-CRSs, in which each relay knows its CSI to the destination before every transmission, SR acquires CSI on the need-to-know basis and significantly outperforms the lifetime of S-CRSs for large number of relays and relatively good channel conditions. The proposed SR selects relay nodes in a distributed manner which makes it suitable for heterogeneous ad-hoc sensor networks in which some relays have processing capabilities and less restricted energy supply, i.e. these relays can act as the intermediate destinations.
Languageen
PublisherIEEE
SubjectAd-hoc sensor networks
Amplify-and-forward
Average lifetime
Average numbers
Channel conditions
Channel reciprocity
Cooperative relay
Energy budgets
Energy efficient
Energy supplies
Low costs
Outage probability
Pilot signals
Processing capability
Random selection
Relay network
Relay node
Relay strategies
Strategy use
Transmit power
Amplification
Channel state information
Communication systems
Sensor nodes
Sensors
Telecommunication
Telecommunication equipment
Transceivers
Wireless networks
Wireless sensor networks
TitleSequential random selection relaying for energy efficient wireless sensor networks
TypeConference Paper
dc.accessType Abstract Only


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