Network coded cooperative communication (NCCC) scheme for cluster networks
Mummana, Suresh Babu
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To effectively combat unreliability of fading channels in wireless networks we developed an energy efficient algorithm that employ cooperation diversity and network coding among terminals in a network, and a method to incorporate this algorithm into cluster network topology. Cooperative diversity technique allows us to create a virtual antenna array, trading off costs--in power, bandwidth and complexity--for the greater benefits gained by exploiting spatial diversity in the channel. Network coding is a new transmission paradigm that takes the advantage of broadcast nature of wireless medium and proved its strength in optimizing, improving the performance and is particularly suitable when robust operation is of high importance. By contrast, classical network architectures only employ point-to-point transmission and thus forge these benefits. Our scheme provides distributed method that selects the best cooperative relay from a set of N available relays with data from the global RSSI table to achieve diversity gains to the order of number of relays in the network. Such diversity gains translate into greatly improved robustness to fading for the same transmit power, or substantially reduced transmitting power for the same level of performance. The simplicity of the technique, allows for immediate implementation in existing radio hardware such as CC1000, CC2420 etc., and its adoption could provide for improved flexibility, reliability and efficiency in present and future wireless cellular and vehicular ad-hoc networks. The performance of the network coded cooperative communication scheme is evaluated in terms of the probability of system outage (P s ) and total power consumption (P t ).