Convex Optimization
Optimal relay assignment for cooperative communications
Proceedings of the 9th ACM international symposium on Mobile ad hoc networking and computing
Stochastic learning solution for distributed discrete power control game in wireless data networks
IEEE/ACM Transactions on Networking (TON)
Joint power allocation and relay selection in cooperative networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Joint power allocation and relay selection for multiuser cooperative communication
IEEE Transactions on Wireless Communications
Subcarrier-pair based resource allocation for cooperative multi-relay OFDM systems
IEEE Transactions on Wireless Communications
Relay selection and power allocation in cooperative cellular networks
IEEE Transactions on Wireless Communications
Cooperative wireless multicast: performance analysis and power/location optimization
IEEE Transactions on Wireless Communications
INFOCOM'10 Proceedings of the 29th conference on Information communications
Energy-efficient broadcasting with cooperative transmissions in wireless sensor networks
IEEE Transactions on Wireless Communications
Improving amplify-and-forward relay networks: optimal power allocation versus selection
IEEE Transactions on Wireless Communications
Selection Cooperation in Multi-Source Cooperative Networks
IEEE Transactions on Wireless Communications
Semi-Distributed User Relaying Algorithm for Amplify-and-Forward Wireless Relay Networks
IEEE Transactions on Wireless Communications
On Relay Assignment in Network-Coded Cooperative Systems
IEEE Transactions on Wireless Communications
Cooperative diversity in wireless networks: Efficient protocols and outage behavior
IEEE Transactions on Information Theory
Cooperative multihop broadcast for wireless networks
IEEE Journal on Selected Areas in Communications
Cooperative multicast for maximum network lifetime
IEEE Journal on Selected Areas in Communications
A simple Cooperative diversity method based on network path selection
IEEE Journal on Selected Areas in Communications
Joint optimization of relay strategies and resource allocations in cooperative cellular networks
IEEE Journal on Selected Areas in Communications
Spectrum Sharing for Multi-Hop Networking with Cognitive Radios
IEEE Journal on Selected Areas in Communications
Multicast Communications in Multi-Hop Cognitive Radio Networks
IEEE Journal on Selected Areas in Communications
Multicast Outage Probability and Transmission Capacity of Multihop Wireless Networks
IEEE Transactions on Information Theory
WSR Maximized Resource Allocation in Multiple DF Relays Aided OFDMA Downlink Transmission
IEEE Transactions on Signal Processing
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We investigate the joint problem of optimal relay selection and power allocation in wireless cellular networks considering both unicast and multicast traffic. We first present mixed Boolean-convex optimization models for both unicast and multicast traffic scenarios to maximize the overall network capacity and solve these combinatorial problems optimally using the branch and bound technique. We then show that obtaining the optimal solution is computationally infeasible for large network sizes. For unicast, similar to [1], we present an efficient water-filling based technique to obtain near optimal solutions. We show that, unlike unicast traffic, water-filling does not yield near optimal solutions in multicast scenarios. We thus adopt an algorithm based on sequential fixing for the multicast case which substantially reduces the computation time and achieves near optimal solutions. Furthermore, in the above scenarios, we assume that the power levels are drawn from a continuous range. To make the proposed methods more practical, we also consider scenarios when the number of power levels is finite (i.e., discrete). We present optimal and sub-optimal methods for solving this optimization problem and compare their performance with previous methods.