Resource Allocation In Wireless Relay Networks

Resource Allocation in Wireless Relay Networks

The idea of using cooperating relays has been much discussed in the past decade. In a wireless communication system, relaying techniques can offer significant benefits in the throughput enhancement and range extension. On the other hand, cognitive radio is an interesting concept for solving the problem of spectrum availability by reusing the underutilized licensed frequency bands. In a cognitive radio network, relays can be particularly useful for reducing the transmission power at the source and thus reduce the interference to the primary users. In this thesis, we study resource allocation problems for cognitive radio networks that employ relays. In this work, the transmission power of the nodes (users and relays) is the resource that we wish to allocate. The power allocation problems are formulated as non-convex non-linear programs and they do not have a structure that could guarantee the quality of the solution. We present a method of transforming the proposed optimization problems to a new formulation so that f-optimal algorithms can be designed. In general, the transformed problem exhibits certain properties, which enable us to solve the optimization problems to a desirable accuracy by applying known global optimization techniques. We note that the global optimization techniques require significant computations to solve our proposed optimizations. Therefore, we propose low complexity heuristics that provide suboptimal solutions to the given optimization problems. The simulation results show that the performance of the heuristics is close to their respective optimal solutions.

Resource Allocation in Next-Generation Broadband Wireless Access Networks

With the growing popularity of wireless networks in recent years, the need to increase network capacity and efficiency has become more prominent in society. This has led to the development and implementation of heterogeneous networks. Resource Allocation in Next-Generation Broadband Wireless Access Networks is a comprehensive reference source for the latest scholarly research on upcoming 5G technologies for next generation mobile networks, examining the various features, solutions, and challenges associated with such advances. Highlighting relevant coverage across topics such as energy efficiency, user support, and adaptive multimedia services, this book is ideally designed for academics, professionals, graduate students, and professionals interested in novel research for wireless innovations.

Dynamic Resource Allocation and Optimization in Wireless Relay Networks