The Experts below are selected from a list of 2130 Experts worldwide ranked by ideXlab platform
Wen-de Zhong - One of the best experts on this subject based on the ideXlab platform.
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An optical Multicast Packet switch using multi-wavelength converters and shared fiber delay lines
2010 Photonics Global Conference, 2010Co-Authors: Qirui Huang, Wen-de ZhongAbstract:This paper studies the traffic performance of our recently proposed Multicast Packet switch using multi-wavelength converters and shared fiber delay lines (FDLs) under a correlated traffic model. Simulation results show that with a few multi-wavelength converters, the proposed Multicast switch can achieve almost the same traffic performance as the broadcast-and-select switch. The complexity evaluation shows that the proposed Multicast switch requires much fewer SOA gates to achieve the same Packet loss probability as the broadcast-and-select switch.
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Wavelength-routed optical Multicast Packet switches
2010 IEEE International Conference on Communication Systems, 2010Co-Authors: Wen-de Zhong, Qirui HuangAbstract:Multicasting in the optical layer is anticipated to significantly reduce the cost and complexity for future optical Packet switched networks by taking full advantage of the huge fiber bandwidth to support the increasing Multicast applications. This paper reviews recent research work on optical Multicast Packet switching. Key technologies and architectures of wavelength-routed Multicast Packet switches are discussed in terms of their advantages and challenges.
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A Wavelength-Routed Multicast Packet Switch With a Shared-FDL Buffer
Journal of Lightwave Technology, 2010Co-Authors: Qirui Huang, Wen-de ZhongAbstract:In this paper, we propose a wavelength-routed Multicast Packet switch using a set of fiber delay lines as a shared buffer for both unicast and Multicast Packets. To avoid Multicast Packet contention, a Multicast Packet could be replicated in multiple timeslots by means of multi-wavelength conversion in conjunction with the shared-FDL buffer. Moreover, a Packet scheduling technique is designed to assist the operation of the newly proposed switch. We investigate the traffic performance and the complexity in terms of component counts of the newly proposed switch in comparison with our previously reported Multicast switch and the broadcast-and-select switch by simulation. Performance evaluation shows that the proposed switch with assistance of the Packet scheduling technique can effectively avoid the performance deterioration caused by the increase of Multicast traffic, leading to a much better performance than our previously reported Multicast switch. In addition, the results show that the proposed switch exhibits an efficient and cost-effective configuration for Packet Multicasting over other switch architectures.
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Multiwavelength Multicast Packet Switch: Performance Analysis and Evaluation
IEEE\ OSA Journal of Optical Communications and Networking, 2010Co-Authors: Qirui Huang, Wen-de ZhongAbstract:This paper presents a multiwavelength Multicast Packet switch and studies its Multicast traffic performance analytically and by simulation. The switch employs the broadcast-and-select architecture to realize Packet Multicasting and enables multiple optical Packets to be concurrently transmitted to the same output fiber of the switch. By means of a multi-timeslot replication scheme, a Multicast Packet is allowed to be replicated in multiple timeslots to reduce the output contention. An analytical model of the switch with the multi-timeslot replication scheme is developed and then verified by simulation. We compare traffic performance of the switch with and without the multi-timeslot replication scheme through simulation. It is shown that the Packet loss probability and delay of the switch are considerably deteriorated as the Multicast traffic ratio increases without using the multi-timeslot replication scheme; with the multi-timeslot replication scheme, the switch can achieve a much lower Packet loss probability and delay, which is not affected by the Multicast traffic ratio, and thus a higher throughput. Scalability analysis indicates that the switch with more wavelengths per fiber can achieve a fixed Packet loss probability with less power loss.
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A wavelength-routed Multicast Packet switch with a shared fiber delay lines buffer
2010Co-Authors: Qirui Huang, Wen-de ZhongAbstract:We present a wavelength-routed Multicast Packet switch where both unicast and Multicast Packets can share a set of fiber delay lines for contention resolution and buffering. Simulation results show that the switch can effectively avoid the deterioration of Packet loss probability induced by the increase of Multicast traffic.
Qirui Huang - One of the best experts on this subject based on the ideXlab platform.
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An optical Multicast Packet switch using multi-wavelength converters and shared fiber delay lines
2010 Photonics Global Conference, 2010Co-Authors: Qirui Huang, Wen-de ZhongAbstract:This paper studies the traffic performance of our recently proposed Multicast Packet switch using multi-wavelength converters and shared fiber delay lines (FDLs) under a correlated traffic model. Simulation results show that with a few multi-wavelength converters, the proposed Multicast switch can achieve almost the same traffic performance as the broadcast-and-select switch. The complexity evaluation shows that the proposed Multicast switch requires much fewer SOA gates to achieve the same Packet loss probability as the broadcast-and-select switch.
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Wavelength-routed optical Multicast Packet switches
2010 IEEE International Conference on Communication Systems, 2010Co-Authors: Wen-de Zhong, Qirui HuangAbstract:Multicasting in the optical layer is anticipated to significantly reduce the cost and complexity for future optical Packet switched networks by taking full advantage of the huge fiber bandwidth to support the increasing Multicast applications. This paper reviews recent research work on optical Multicast Packet switching. Key technologies and architectures of wavelength-routed Multicast Packet switches are discussed in terms of their advantages and challenges.
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A Wavelength-Routed Multicast Packet Switch With a Shared-FDL Buffer
Journal of Lightwave Technology, 2010Co-Authors: Qirui Huang, Wen-de ZhongAbstract:In this paper, we propose a wavelength-routed Multicast Packet switch using a set of fiber delay lines as a shared buffer for both unicast and Multicast Packets. To avoid Multicast Packet contention, a Multicast Packet could be replicated in multiple timeslots by means of multi-wavelength conversion in conjunction with the shared-FDL buffer. Moreover, a Packet scheduling technique is designed to assist the operation of the newly proposed switch. We investigate the traffic performance and the complexity in terms of component counts of the newly proposed switch in comparison with our previously reported Multicast switch and the broadcast-and-select switch by simulation. Performance evaluation shows that the proposed switch with assistance of the Packet scheduling technique can effectively avoid the performance deterioration caused by the increase of Multicast traffic, leading to a much better performance than our previously reported Multicast switch. In addition, the results show that the proposed switch exhibits an efficient and cost-effective configuration for Packet Multicasting over other switch architectures.
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Multiwavelength Multicast Packet Switch: Performance Analysis and Evaluation
IEEE\ OSA Journal of Optical Communications and Networking, 2010Co-Authors: Qirui Huang, Wen-de ZhongAbstract:This paper presents a multiwavelength Multicast Packet switch and studies its Multicast traffic performance analytically and by simulation. The switch employs the broadcast-and-select architecture to realize Packet Multicasting and enables multiple optical Packets to be concurrently transmitted to the same output fiber of the switch. By means of a multi-timeslot replication scheme, a Multicast Packet is allowed to be replicated in multiple timeslots to reduce the output contention. An analytical model of the switch with the multi-timeslot replication scheme is developed and then verified by simulation. We compare traffic performance of the switch with and without the multi-timeslot replication scheme through simulation. It is shown that the Packet loss probability and delay of the switch are considerably deteriorated as the Multicast traffic ratio increases without using the multi-timeslot replication scheme; with the multi-timeslot replication scheme, the switch can achieve a much lower Packet loss probability and delay, which is not affected by the Multicast traffic ratio, and thus a higher throughput. Scalability analysis indicates that the switch with more wavelengths per fiber can achieve a fixed Packet loss probability with less power loss.
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A wavelength-routed Multicast Packet switch with a shared fiber delay lines buffer
2010Co-Authors: Qirui Huang, Wen-de ZhongAbstract:We present a wavelength-routed Multicast Packet switch where both unicast and Multicast Packets can share a set of fiber delay lines for contention resolution and buffering. Simulation results show that the switch can effectively avoid the deterioration of Packet loss probability induced by the increase of Multicast traffic.
Sanjay Jha - One of the best experts on this subject based on the ideXlab platform.
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A high-throughput routing metric for reliable Multicast in multi-rate wireless mesh networks
Proceedings - IEEE INFOCOM, 2011Co-Authors: Xin Zhao, Chun Tung Chou, Jun Guo, Archan Misra, Sanjay JhaAbstract:We propose a routing metric for enabling high-throughput reliable Multicast in multi-rate wireless mesh networks. This new Multicast routing metric, called expected Multicast transmission time (EMTT), captures the combined effects of 1) MAC-layer retransmission-based reliability, 2) transmission rate diversity, 3) wireless broadcast advantage, and 4) link quality awareness. The EMTT of one-hop transmission of a Multicast Packet minimizes the amount of expected transmission time (including that required for retransmissions). This is achieved by allowing the sender to adapt its bit-rate for each ongoing transmission/retransmission, optimized exclusively for its next-hop receivers that have not yet received the Multicast Packet. We model the rate adaptation process as a Markov decision process (MDP) and derive an efficient procedure for computing EMTT from the theory of MDP. We present receiver-initiated algorithms and describe protocol implementation for the EMTT-based Multicast routing problem. Numerical results are presented to demonstrate the accuracy of the proposed algorithms against optimal solutions to the Multicast routing problem. Simulation experiments confirm that, in comparison with single-rate Multicast, multi-rate Multicast using the EMTT metric effectively reduces the overall Multicast transmission time while yielding higher Packet delivery ratio and lower end-to-end latency.
Howard Jay Siegel - One of the best experts on this subject based on the ideXlab platform.
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efficient Multicast Packet authentication using signature amortization
IEEE Symposium on Security and Privacy, 2002Co-Authors: Jungmin Park, Edwin K P Chong, Howard Jay SiegelAbstract:We describe a novel method for authenticating Multicast Packets that is robust against Packet loss. Our main focus is to minimize the size of the communication overhead required to authenticate the Packets. Our approach is to encode the hash values and the signatures with Rabin's Information Dispersal Algorithm (IDA) to construct an authentication scheme that amortizes a single signature operation over multiple Packets. This strategy is especially efficient in terms of space overhead, because just the essential elements needed for authentication (i.e., one hash per Packet and one signature per group of Packets) are used in conjunction with an erasure code that is space optimal. To evaluate the performance of our scheme, we compare our technique with four other previously proposed schemes using analytical and empirical results. Two different bursty loss models are considered in the analyses.
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IEEE Symposium on Security and Privacy - Efficient Multicast Packet authentication using signature amortization
Proceedings 2002 IEEE Symposium on Security and Privacy, 2002Co-Authors: Jungmin Park, Edwin K P Chong, Howard Jay SiegelAbstract:We describe a novel method for authenticating Multicast Packets that is robust against Packet loss. Our main focus is to minimize the size of the communication overhead required to authenticate the Packets. Our approach is to encode the hash values and the signatures with Rabin's Information Dispersal Algorithm (IDA) to construct an authentication scheme that amortizes a single signature operation over multiple Packets. This strategy is especially efficient in terms of space overhead, because just the essential elements needed for authentication (i.e., one hash per Packet and one signature per group of Packets) are used in conjunction with an erasure code that is space optimal. To evaluate the performance of our scheme, we compare our technique with four other previously proposed schemes using analytical and empirical results. Two different bursty loss models are considered in the analyses.
Patrick Seeling - One of the best experts on this subject based on the ideXlab platform.
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Multicast capacity of Packet switched ring wdm networks
IEEE Transactions on Information Theory, 2008Co-Authors: Michael Scheutzow, Martin Maier, Martin Reisslein, Patrick SeelingAbstract:Packet-switched unidirectional and bidirectional ring wavelength division multiplexing (WDM) networks with destination stripping provide an increased capacity due to spatial wavelength reuse. Besides unicast traffic, future destination stripping ring WDM networks also need to support Multicast traffic efficiently. This article examines the largest achievable transmitter throughput, receiver throughput, and Multicast throughput of both unidirectional and bidirectional ring WDM networks with destination stripping. A probabilistic analysis evaluates both the nominal capacity, which is based on the mean hop distances traveled by the Multicast Packet copies, and the effective capacity, which is based on the ring segment with the highest utilization probability, for each of the three throughput metrics. The developed analytical methodology accommodates not only Multicast traffic with arbitrary Multicast fanout but also unicast and broadcast traffic. Numerical investigations compare the nominal transmission, receiver, and Multicast capacities with the effective transmission, receiver, and Multicast capacities and examine the impact of number of ring nodes and Multicast fanout on the effective transmission, reception, and Multicast capacity of both types of ring networks for different unicast, Multicast, and broadcast traffic scenarios and different mixes of unicast and Multicast traffic. The presented analytical methodology enables the evaluation and comparison of future Multicast-capable medium access control (MAC) protocols for unidirectional and bidirectional ring WDM networks in terms of transmitter, receiver, and Multicast throughput efficiency.
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Multicast capacity of Packet switched ring wdm networks
International Conference on Computer Communications, 2005Co-Authors: Michael Scheutzow, Patrick Seeling, Martin Maier, Martin ReissleinAbstract:Packet-switched unidirectional and bidirectional ring wavelength division multiplexing (WDM) networks with destination stripping provide an increased capacity due to spatial wavelength reuse. Besides unicast traffic, future destination stripping ring WDM networks also need to support Multicast traffic efficiently. In this paper, we provide a probabilistic analysis of the mean hop distances traveled by Multicast Packet copies on the wavelength channels, and based on the mean hop distances analyze the nominal transmission capacity, reception capacity, and Multicast capacity of both unidirectional and bidirectional ring WDM networks with destination stripping. The developed analytical methodology accommodates not only Multicast traffic with arbitrary Multicast fanout but also unicast and broadcast traffic. In our numerical investigations we examine the impact of number of ring nodes and Multicast fanout on the transmission, reception, and Multicast capacity of both types of ring networks for different unicast, Multicast, and broadcast traffic scenarios and different mixes of unicast and Multicast traffic. Our analytical methodology provides a foundation for extended analyses of the Multicast capacity of WDM ring networks and enables the evaluation and comparison of future Multicast-capable medium access control (MAC) protocols for unidirectional and bidirectional ring WDM networks in terms of transmitter, receiver, and Multicast throughput efficiency.