Understanding digital subscriber line technology
Understanding digital subscriber line technology
Wireless Communications
Fast multiple access selection through variable power transmissions
IEEE Transactions on Wireless Communications
Single and multiple relay selection schemes and their achievable diversity orders
IEEE Transactions on Wireless Communications
Splitting algorithms for fast relay selection: generalizations, analysis, and a unified view
IEEE Transactions on Wireless Communications
Optimal timer based selection schemes
IEEE Transactions on Communications
Cooperative wireless communications: a cross-layer approach
IEEE Wireless Communications
Energy-constrained modulation optimization
IEEE Transactions on Wireless Communications
Cross-Layer Energy and Delay Optimization in Small-Scale Sensor Networks
IEEE Transactions on Wireless Communications
Cooperative Communications with Outage-Optimal Opportunistic Relaying
IEEE Transactions on Wireless Communications
Selection Cooperation in Multi-Source Cooperative Networks
IEEE Transactions on Wireless Communications
PHY-layer Fairness in Amplify and Forward Cooperative Diversity Systems
IEEE Transactions on Wireless Communications
Energy-Efficient Cooperative Relaying over Fading Channels with Simple Relay Selection
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Performance analysis of single relay selection in rayleigh fading
IEEE Transactions on Wireless 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
Voluntary energy harvesting relays and selection in cooperative wireless networks
IEEE Transactions on Wireless Communications
Improving fairness in IEEE 802.11 networks using MAC layer opportunistic retransmission
Computer Networks: The International Journal of Computer and Telecommunications Networking
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A common and practical paradigm in cooperative communication systems is the use of a dynamically selected 'best' relay to decode and forward information from a source to a destination. Such systems use two phases - a relay selection phase, in which the system uses transmission time and energy to select the best relay, and a data transmission phase, in which it uses the spatial diversity benefits of selection to transmit data. In this paper, we derive closed-form expressions for the overall throughput and energy consumption, and study the time and energy trade-off between the selection and data transmission phases. To this end, we analyze a baseline non-adaptive system and several adaptive systems that adapt the selection phase, relay transmission power, or transmission time. Our results show that while selection yields significant benefits, the selection phase's time and energy overhead can be significant. In fact, at the optimal point, the selection can be far from perfect, and depends on the number of relays and the mode of adaptation. The results also provide guidelines about the optimal system operating point for different modes of adaptation. The analysis also sheds new insights on the fast splitting-based algorithm considered in this paper for relay selection.