Fountain codes for frequency occupancy information dissemination

Shao, X. and Cronie, H.S. and Hoeksema, F.W. and Slump, C.H. (2006) Fountain codes for frequency occupancy information dissemination. In: 17th Annual Workshop on Circuits, 23-24 Nov 2006, Veldhoven, The Netherlands.

PDF
Restricted to UT campus only: Request a copy
169Kb

Abstract:	Cognitive radio (CR) is defined as an intelligent wireless communication system based on secondary utilization of an already licensed frequency band. In order to communicate without interfering the legal users (primary users), cognitive radio nodes should have the same overview of the spectrum occupancy information. In other words, each cognitive radio node should disseminate frequency occupancy information (FOI) to other CR nodes reliably after sensing the environment. Normally, people employ retransmission protocols to communicate reliably. This leads to redundancy in reliable dissemination, especially in a multicasting or broadcasting situation. However, the application of fountain codes could make reliable dissemination possible without too much redundancy. A fountain-code based approach is more efficient than using retransmission protocols for disseminating large-sized file. In the paper we show this is also the case when applying fountain codes in disseminating a small FOI file (e.g. a binary vector originating from a 512 points FFT). Fountain codes only work optimally in an erasure channel. In the paper we show the utilization of error-correcting codes to convert a noisy channel into an erasure channel.
Item Type:	Conference or Workshop Item
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Signals and Systems (SAS)
Link to this item:	http://purl.utwente.nl/publications/63882
Export this item as:	BibTeX EndNote HTML Citation Reference Manager

Show download statistics for this publication

Repository Staff Only: item control page

Metis ID: 237864