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Multi-path Routing with End-to-end Statistical QoS
- Provisioning in Underlay Cognitive Radio Networks, IEEE INFOCOM Workshop
, 2011
"... Abstract-Since the radio access of secondary users is typically confined to ensure sufficient operation for primary users in underlay cognitive radio networks (CRNs), the inevitably induced latency and interference pose new challenges on existing routing schemes for Quality-of-Service (QoS) provisi ..."
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Abstract-Since the radio access of secondary users is typically confined to ensure sufficient operation for primary users in underlay cognitive radio networks (CRNs), the inevitably induced latency and interference pose new challenges on existing routing schemes for Quality-of-Service (QoS) provisioning. Due to stringent accessing and interference constraints, secondary users appeal to exploit multi-path routing based on multi-hop relaying protocol to support QoS requirements. Via our model, we derive the end-to-end delay statistics including medium access and retransmission delay, where we successfully relate path diversity to end-to-end reliability and optimize the delivery delay by adjusting transmission power. We analyze the performance of the duplication-based and coding-aided multi-path routing schemes, where opportunistic transmission is employed to improve the delivery delay due to channel awareness, and encoding packets on multiple paths further achieves throughput efficiency. This paper firstly presents insights and performance analysis to facilitate multi-path routing with QoS provisioning in underlay CRN.
Jawaharlal Nehru Technological University,
"... In the Internet, video streaming requires greater amount of network bandwidth and other resources as the number of user requests increases. In case of traditional centralized directory server approach all the users requests are directly handled by the centralized server and each user request will se ..."
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In the Internet, video streaming requires greater amount of network bandwidth and other resources as the number of user requests increases. In case of traditional centralized directory server approach all the users requests are directly handled by the centralized server and each user request will send dedicated stream by the server, which requires higher end server, server cost will become more and greater amount of network bandwidth utilized by this server. To solve these problems peer to peer technology as emerged for the distribution of video streams to the larger requests over the network. In P2P VoD architecture adopted both the peer to peer and proxy based architectural design of a VOD system for larger community of users over the network. Hence our proposed Peer to Peer Video on Demand Architecture using V-Chaining improves the overall performance of the system by efficient utilization of uplink bandwidth and smaller amount of buffer space among the peers. In this paper we have introduce architecture for handle the large number of user requests over the communication network and ease of implementation.
Source-Directed Path Diversity in the Interdomain Routing
"... Abstract—The Internet has abundant path redundancy, especially in the interdomain routing. However, current routing system can not exploit the Internet path diversity and utilize the disjoint end-to-end paths efficiently. The unawareness of sources to the path selection and the best paths advertisem ..."
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Abstract—The Internet has abundant path redundancy, especially in the interdomain routing. However, current routing system can not exploit the Internet path diversity and utilize the disjoint end-to-end paths efficiently. The unawareness of sources to the path selection and the best paths advertisement mechanism in the interdomain routing make it difficult to use disjoint end-to-end paths. In this paper, we present the Source-Directed Path Diversity (SDPD), leveraging which sources can specify the alternate paths to forward the traffic besides the default path. In SDPD, the packets carry the Source-Directed Tag (SDT) in the packet headers to hint the BGP routers the preference of the sources on the path selection, while the BGP routers forward the packets independently based on the sources' indication. Moreover, we propose the multipath advertisement of the BGP route reflectors in SDPD to reduce the filtration of the redundant paths in the interdomain routing. We evaluate the SDPD through simulations over a synthetic Internet-like topology. The simulation results show that the SDPD can exploit alternate paths with low similarity and stretch efficiently.
