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Implementing multiple channels among the multi-radio nodes of wireless mesh networks (WMNs) improve the capacity of the network. In this paper, we propose channel aware routing metric (CARM) as a new routing metric that facilitates the use of available channels in 802.11 WMNs. It chooses a route that has better link quality, reduced switching delay and better channel diversity. Unlike all the other...
In this paper, we propose a cross-layer routing protocol design over multi-power, multi-interface wireless mesh networks (WMNs). Variable transmission power levels cause different network connectivity and impact the route discovery. Further, different power levels have different network spatial reusability and interference. These features affect the network throughput and end-to-end delay. We incorporate...
Despite the many routing protocols to choose from in the existing wireless network literature, routing has remained a challenging problem in the actual deployment of wireless mesh and ad hoc networks. To address some of the issues involved with routing in wireless mesh networks, in this paper we attempt to make routing more sensitive to the dynamics of the network such as interference, traffic load...
IEEE P1900.4 is an emerging standard for optimized radio resource utilization where cognitive radio technologies are used for efficient spectrum utilization. In this paper, we design and implement a cognitive wireless network system based on open documents of IEEE P1900.4, and evaluate its performance using UDP streaming and HTTP download. Our experiments show interesting results that total network...
Wireless mesh network (WMN) has become a popular access network architecture. But because of its multi-hop nature, co-channel interference and contention, the attainable capacity of a wireless node in a WMN is significantly less than the radio capacity. We propose a overlay architecture for a WMN, where a wireless-ring (WRing) is deployed over the regular mesh for carrying wireless mesh traffic only...
Cognitive radio networks offer the promise of adaptively allocating resources on the fly. In this paper, we describe an interference mitigation technique that relies on intelligent resource allocation across a mesh network. In previous work, we presented a method for improving the performance of wireless mesh networks (WMN) through the use of multichannel wormhole switching. An approximate 800-fold...
In this paper, we propose an adaptive pacing scheme at the link layer for IEEE 802.11 based multihop wireless networks. Our objective is to improve the performance of higher layer protocols without any modifications to them. Our adaptive pacing scheme estimates the four-hop transmission delay in the network path without incurring any additional overheads, and accordingly paces the packets to reduce...
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