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UBC Theses and Dissertations

Novel protocols for the two-hop half-duplex relay network Zlatanov, Nikola


Wireless communication has enabled people to be connected from anywhere and at any time. This has had a profound impact on human society. Currently, wireless communication is performed using the communication protocols developed for cellular and wireless local area networks. Although these protocols support a broad range of mobile services, they do not fully exploit the capacity of the underlying networks and cannot satisfy the exponential growth in demand for higher data rates and more reliable connections. Therefore, new communication protocols have to be developed for general wireless networks in order to meet this demand. Ultimately, these protocols will have to be able to reach the fundamental limits of information flow in wireless networks, i.e., the network capacity. However, due to the complexity of the problem, it is currently not known how to design such protocols for general wireless networks. Therefore, in order to get insight into this problem, as a first step, communication protocols for very simple wireless networks have to be devised. Later, the gained knowledge can be exploited to design protocols for more complex networks. In this thesis, we propose new communication protocols for the simplest half-duplex relay network, which is also the most basic building block of any wireless network, the two-hop half-duplex relay network. This network is comprised of a source, a half-duplex relay, and a destination where a direct source-destination link is not available. For the considered relay network, we propose three novel communication protocols. The first proposed protocol achieves the capacity of the considered network when fading on the source-relay and relay-destination links is not present. The second and third protocols significantly improve the average data rate and the outage probability, respectively, of the considered network when both the source-relay and the relay-destination links are affected by fading.

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Attribution-NonCommercial-NoDerivs 2.5 Canada