An alternative non-cooperative transmission scheme based on coded redundant information

Abstract

Some of the future wireless networks are related tothe provision of higher data rates and lower energy consumption.In contrast to the clear increasing spectrum demand, bandwidthis a limited resource. Cooperative diversity allows to increasethe spectral efficiency and the reliability of the communication.However, in scenarios with high node density and high mobiledata traffic volume the collaboration between multiple nodes canbe a huge challenge. In this paper we focus on cognitive radioscenarios in which the users are only allowed to transmit with alimited power and have few opportunities to access the medium.Then, we propose an alternative non-cooperative transmissionscheme based on coded redundant information through whichusers can automatically revert back, when cooperation is notpossible. The results indicate that the proposed method outper-forms direct transmission and simple repetition schemes, in termsof reliability, as well as spectral and energy efficiency.