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Secondary Users (SUs) in a Cognitive Radio Network (CRN) face unpredictable interruptions in transmission due to the random arrival of Primary Users (PUs), leading to spectrum handoff or dropping instances. An efficient spectrum handoff algorithm, thus, becomes one of the indispensable components in CRN, especially for real-time communication like Voice over IP (VoIP). In this regard, this paper investigates...
Wireless Body Area Network over Software Defined Radio (SDR) Platform is the solution towards providing ubiquitous wireless health monitoring of patients over Internet. In this paper, a system is designed to enable ECG signals to be compressed and communicated to remote server at regular intervals over SDR platform comprised of Wireless Open Access Research Platform boards. To enable this, a TCP/IP...
Cognitive Radio Network (CRN) ensures higher utilization of spectrum by allowing secondary users to transmit in licensed frequency bands in absence of primary users. In order to reduce interference among these users, CRN imposes a maximum limit on total number of users that can be admitted in CRN. The overall user capacity is further increased by implementing VoIP based 2-tier CRN that allows another...
VoIP service demands strong QoS support for enhanced call quality and increased user satisfaction. Deploying VoIP in opportunistic communication models like cognitive radio requires thorough analysis of the factors involved in design and implementation. The objective of this paper is to implement VoIP successfully over a cognitive radio network and maintain the call quality at an acceptable limit...
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