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Cognitive Radio Ad-Hoc Network (CRAHN) is an emerging class of mobile ad hoc networks that provides each network node with a list of available channels. It is expected that the traditional routing approach will not work well in CRAHN, by which its performance may be determined by user and channel interferences, as well as by frequent topology changes. The result is varying connectivity conditions...
Real-time applications such as multimedia applications have high requirements on bandwidth, delay, jitter etc, which requires WMN (Wireless Mesh Networks) to support QoS. QoS routing is crucial to provide QoS. This paper focuses on QoS routing with bandwidth constraint in multi-radio multi-channel WMN, and proposes a new multi-metric and a QoS routing protocol MMQR. The routing metric has two advantages...
In multihop wireless networks each node is equipped with multiple radio interfaces, and multiple channels are available for communication. One of the major problems in such networks is the capacity reduction due to the interference among multiple simultaneous transmissions. In order to effectively minimize interference, this paper proposes a QoS routing protocol CATR based on channel assignment and...
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...
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