Résultats de recherche pour « Wireless Mesh Network »

Interference is one of the most challenging issues in wireless network. Communication between a transmitter and receiver pair causes radio wave propagation to interfere with other nearby communication that may result blocking that link. In Multicast, since almost simultaneous communication takes place along several branches of a Multicast distribution tree, these branches tend to mutually block each other due to interference. In this research we introduced an Interference-Aware Multicast routing protocol. First, it divides the nodes in the Multicast distribution tree in three GORby-Groups: Transmit, REC1 (receiving) and REC2 (standby). Then we calculate the SINR of the node based on interferences caused by all the nodes within that GORby-Group, assuming when the given node is in the transmit mode then all the nodes within its GORby-Group will also be in the transmit mode. Then we use the computed SINRs in our join Multicast group algorithm to achieve the most SINR.

<p>Wireless mesh network (WMN) is popular for providing decentralized and relatively inexpensive Internet access, especially in Community network and geographically challenged areas of deployment. In this thesis, we proposed using OSPF as the underlying routing protocol in the Wireless Mesh Backbone (WMB) network. We investigated the convergence and configuration issues of OSPF in WMB network. We evaluated the performance of OSPF and compared with AODV (reactive ad hoc protocol) and OLSR (proactive ad hoc protocol). We proposed using multiple subinterfaces under a single physical wireless interface in configuring multiple subnets to deal with the hidden nodes problem in WMB networks. We also proposed using the BGP protocol to interconnect multiple OSPF areas for the sub-urban topology. The performance of this approach in terms of convergence time was studied. </p>

Interference is one of the most challenging issues in wireless network. Communication between a transmitter and receiver pair causes radio wave propagation to interfere with other nearby communication that may result blocking that link. In Multicast, since almost simultaneous communication takes place along several branches of a Multicast distribution tree, these branches tend to mutually block each other due to interference. In this research we introduced an Interference-Aware Multicast routing protocol. First, it divides the nodes in the Multicast distribution tree in three GORby-Groups: Transmit, REC1 (receiving) and REC2 (standby). Then we calculate the SINR of the node based on interferences caused by all the nodes within that GORby-Group, assuming when the given node is in the transmit mode then all the nodes within its GORby-Group will also be in the transmit mode. Then we use the computed SINRs in our join Multicast group algorithm to achieve the most SINR.

<p>Wireless mesh network (WMN) is popular for providing decentralized and relatively inexpensive Internet access, especially in Community network and geographically challenged areas of deployment. In this thesis, we proposed using OSPF as the underlying routing protocol in the Wireless Mesh Backbone (WMB) network. We investigated the convergence and configuration issues of OSPF in WMB network. We evaluated the performance of OSPF and compared with AODV (reactive ad hoc protocol) and OLSR (proactive ad hoc protocol). We proposed using multiple subinterfaces under a single physical wireless interface in configuring multiple subnets to deal with the hidden nodes problem in WMB networks. We also proposed using the BGP protocol to interconnect multiple OSPF areas for the sub-urban topology. The performance of this approach in terms of convergence time was studied. </p>