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For protocol and system design in cognitive radio networks (CRNs), it is essential to identify which system settings or environmental conditions have great impacts on the quality-of-service (QoS) performance for secondary users (SUs) and how they influence it, which are still open issues. In this paper, an analytical framework to quantify the queue dynamics of a multi-SU multichannel CRN is developed...
In this paper, we investigate the TCP throughput performance enhancement for cognitive radio networks (CRNs) through lower-layer configurations. There is an interaction between TCP and the lower-layer operations. The TCP sending rate at the transport layer determines the packet arrival rate of the lower-layer buffer, and meanwhile it is influenced by the average round trip time and packet loss rate,...
In this paper, the queue dynamics of secondary users (SUs) in a multi-SU and multi-channel cognitive radio network is analyzed to obtain the expressions of quality of service (QoS) metrics. Specially, in the analysis, we take several lower-layer mechanisms and settings into account, including automatic repeat request (ARQ), finite-size buffer, adaptive modulation and coding (AMC) and non-ignorable...
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