Abstract
In the previous chapter, we have examined medium access control (MAC) layer issues in cooperative networks and have introduced several cooperative MAC protocols to help exploit cooperative advantages from the MAC layer. In this chapter, we take a further look at other higher-layer issues in cooperative networks, including quality-of-service (QoS), routing, and security. First, we examine the advantages of cooperation in terms of enhancing the QoS for networks that support, e.g., multimedia applications. The concept of effective capacity is utilized to characterize the QoS and conditions are provided on when a certain QoS requirement can be met. Secondly, we introduce the role of cooperative transmissions in network routing problems.
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