Cooperative Communication with Untrustworthy Relays

Marwan Farhat (ANU)

APPLIED SIGNAL PROCESSING SERIES

DATE: 2011-10-27
TIME: 11:00:00 - 11:30:00
LOCATION: RSISE Seminar Room, ground floor, building 115, cnr. North and Daley Roads, ANU
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ABSTRACT:
In cooperative wireless networks, relay nodes are used to improve diversity, performance and channel capacity. In such a scheme, nodes (e.g. mobile stations) communicate with their neighbours forming a virtual antenna array. This array would assist in relaying the source messages to the destination. However, it is possible that some malicious nodes may enter the network and deteriorate its performance by relaying incorrect or noisy messages. Such a malicious act would certainly have negative effects on performance but can also potentially have major security implications. Moreover, nodes can also act selfishly and simply refuse to forward any messages. We attempt to answer the question if and when a relay should be used under such circumstances. Since the relay behaviour is characterised by a probabilistic cooperation model which exploits the uncertainty in the wireless channel, we use this to model and study the effects of "Trust" on the performance of the cooperative network using BER and Throughput as our measures.
BIO:
Marwan Farhat is a Master student with the school of Engineering at ANU with the focus of the Master being on Telecommunication, specifically digital and wireless communications. He holds a Bachelor degree in Software Engineering from Sydney University and has worked for a number of years in the I.T. industry in Sydney and Canberra.