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In this paper, we discuss the issues of the QoS routing for group communications in Cognitive Radio (CR) networks. The problem of our concern is: given a CR ad hoc network and a QoS group communication request, how to set up a communication connection so that the total bandwidth consumption of the communication is minimized while the QoS requirement is met. In this paper, we focus on the bandwidth...
The explosive growth in the use of real-time applications on mobile devices has resulted in new challenges to the design of routing protocols for cognitive radio ad hoc networks (CRANs). In this paper, we propose a new on-demand Quality-of-Service (QoS) routing, namely an energy efficient QoS routing (EQR) protocol for CRANs using TDMA. It can establish QoS routes with reserved bandwidth on a per...
Cognitive radio network has received increasing attention in recent few years. Cognitive radio network is viewed as a novel network for improving the utilization of a precious natural resource: the radio electromagnetic spectrum. This paper first gives a general overview of the background and concept of cognitive radio network. Then we focus on the routing algorithm based on the QoS requirement. In...
In this paper, we study QoS routing in wireless mesh networks with cognitive radios, which involves route selection, channel allocation and scheduling. It turns out to be a hard problem because of the impact of interference and channel heterogeneity. We formally model it as an optimization problem and present an integer linear programming (ILP) formulation to provide optimal solutions. We then present...
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