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Transmission Control Protocol (TCP) is the most commonly used transport protocol on the Internet. All indications assure that it will be an integral part of the future internetworks. In this paper, we present how regular TCP which was designed for wired networks is not suitable for dynamic spectrum access networks. We develop an analytical model to estimate the TCP throughput of Dynamic spectrum access...
Cognitive radio networks deal with opportunistic spectrum access leading to greater utilization of the spectrum. The extent of utilization depends on the primary user's traffic and also on the way the spectrum is accessed by the primary and secondary users. In this paper Continuous-time Markov chains are used to model the spectrum access. The proposed three- dimensional model represents a more accurate...
Wireless mesh network (WMN) appears to be a promising alternative for next generation wireless networking. Wireless mesh networks have applications ranging from civilian wireless Internet applications to tactical and emergency response applications. Though wireless mesh networks appear as a viable alternative to the existing wireless infrastructure, there are still many issues which require more investigation...
The concept of cognitive radio networks has introduced a new way of sharing the open spectrum flexibly and efficiently. However, there are several issues that hinder the deployment of such dynamic networks. The common control channel problem is one of such issue. Cognitive radio networks are designed by assuming the availability of a dedicated control channel. In this paper, we identify and discuss...
Cognitive networks enable efficient sharing of the radio spectrum. Multi-hop cognitive network is a cooperative network in which cognitive users take help of their neighbors to forward data to the destination. Control signals used to enable cooperation communicate through a common control channel (CCC). Such usage introduces conditions like channel saturation which degrades the overall performance...
Cognitive networks enable efficient sharing of the radio spectrum. Control signals used to setup a communication are broadcast to the neighbors in their respective channels of operation. But since the number of channels in a cognitive network is potentially large, broadcasting control information over all channels will cause a large delay in setting up the communication. Thus, exchanging control information...
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