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Full-Text Articles in Physical Sciences and Mathematics
Label Switching Using The Ipv6 Address Hierarchy, P. Boustead, Joe F. Chicharo
Label Switching Using The Ipv6 Address Hierarchy, P. Boustead, Joe F. Chicharo
Faculty of Informatics - Papers (Archive)
Current label switching protocols can use routing, address, and address hierarchy information to group flows for cut-throughs that bypass IP forwarding. This paper examines a label switching solution that uses the IP version 6 (IPv6) address structure to classify and cut-through flows based on address hierarchy. The performance of this approach is examined using actual backbone traffic traces with associated hierarchical address information obtained from Internet address registries, routing arbiter databases and route servers. This hierarchical address information is used to map a hierarchical address structure over the packet level trace. We investigate the relationship between aggregation bit-mask size versus …
Unfairness And Capture Behaviour In 802.11 Adhoc Networks, C. Ware, J. Judge, Joe F. Chicharo, E. Dutkiewicz
Unfairness And Capture Behaviour In 802.11 Adhoc Networks, C. Ware, J. Judge, Joe F. Chicharo, E. Dutkiewicz
Faculty of Informatics - Papers (Archive)
We address issues with the performance of IEEE 802.11, when used in the adhoc mode, in the presence of hidden terminals. We present results illustrating the strong dependence of channel capture behavior on the SNR observed on contending hidden connections. Experimental work has illustrated that in a hidden terminal scenario, the connection having the strongest SNR is able to capture the channel, despite the use of the RTS-CTS-DATA-ACK 4-way handshake designed to alleviate this problem. Our results indicate that the near-far SNR problem may have a significant effect on the performance of an adhoc 802.11 network.