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The concept of effective capacity offers a novel methodology to investigate the impact that design decisions at the physical layer may have on system performance at the link layer. Assuming a constant flow of incoming data, the effective capacity characterizes the maximum arrival rate that a wireless system can support as a function of its service requirements. Service requirements in this framework...
This paper considers a two-user, quasi-static multiple access channel with hybrid-automatic repeat request (HARQ) and user cooperation. The protocol uses incremental redundancy HARQ packet transmission from both users until at least one userpsilas packet is successfully decoded. If one userpsilas packet is successful before the other, the successful user begins to act as a relay for the other user...
Network coding has gained significant attention in recent years as a means to improve throughput, especially in multicast scenarios. These capacity gains are achieved by combining packets algebraically at various points in the network, thereby alleviating local congestion at the nodes. The benefits of network coding are greatest when the network is heavily utilized or, equivalently, when the sources...
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