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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Kokalj-Filipovic, S. Spasojevic, P. Yates, R. Soljanin, E. |
| Copyright Year | 2008 |
| Description | Author affiliation: Dept. of Electr. & Comput. Eng., Rutgers Univ., North Brunswick, NJ (Kokalj-Filipovic, S.; Spasojevic, P.; Yates, R.) |
| Abstract | This paper studies decentralized strategies for facilitating data collection in circular wireless sensor networks, which rely on the stochastic diversity of data storage. The goal is to allow for a reduced delay collection by a mobile data collector (MDC) who accesses the network at a random position and random time. We consider a two-phase data collection: the push phase is mechanized through source packet dissemination strategies based on network coding; the pull phase is based on polling of additional packets from their original source nodes. Dissemination is performed by a set of relays which form a circular route to exchange source packets. The storage nodes within the transmission range of the routeiquests relays linearly combine and store overheard relay transmissions. MDC first collects a set of packets in its physical proximity and, using a message-passing decoder, attempts recovering all original source packets from this set. Whenever the decoder stalls a source packet which restarts decoding is polled/doped from its original source. The number of doped packets can be surprisingly small and, hence, the push-pull doping strategy may have the least collection delay when the density of source nodes is sufficiently large. Furthermore, the Ideal Soliton fountain encoding is a good linear combining strategy at the storage nodes whenever doping is employed. |
| Starting Page | 545 |
| Ending Page | 550 |
| File Size | 616195 |
| Page Count | 6 |
| File Format | |
| ISBN | 9781424422463 |
| DOI | 10.1109/CISS.2008.4558585 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2008-03-19 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Wireless sensor networks Delay effects Diversity reception Stochastic processes Memory Doping Solitons Network coding Decoding Relays |
| Content Type | Text |
| Resource Type | Article |
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