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WLC41-6: Cooperative Relay Networks Using Fountain Codes
- Source :
- GLOBECOM
- Publication Year :
- 2006
- Publisher :
- IEEE, 2006.
-
Abstract
- We investigate a cooperative communications scheme with N parallel relays, where both the transmissions from the source to the relays and from the relays to the destination use fountain codes. Receivers for fountain codes can accumulate mutual information, while traditional energy collection methods, such as repetition or cooperative space-time codes, only accumulate energy. As a consequence, using fountain codes can reduce the total energy required for transmitting data from the source to the destination. We first analyze the scenario where the source stops transmitting and the relay nodes start transmitting after L relay nodes have successfully decoded the source data. We optimize L, and also give closed-form equations for the energy savings that can be achieved by the use of mutual-information-collection at the receiver instead of traditional energy-collection methods. We then analyze an alternate scenario where each relay node starts its transmission to the destination as soon as it has decoded the source data, and helps the other relay nodes that are still in reception mode. Doing so further reduces the total transmission time and energy consumption.
- Subjects :
- Computer science
business.industry
Node (networking)
ComputerSystemsOrganization_COMPUTER-COMMUNICATIONNETWORKS
Data_CODINGANDINFORMATIONTHEORY
Energy consumption
law.invention
Spread spectrum
Transmission (telecommunications)
Relay
law
Fountain code
Computer Science::Networking and Internet Architecture
business
Relay channel
Computer Science::Information Theory
Computer network
Subjects
Details
- ISSN :
- 1930529X
- Database :
- OpenAIRE
- Journal :
- IEEE Globecom 2006
- Accession number :
- edsair.doi...........8c0ff5b50a174c2106e90ab24b159318