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Local segment-shared protection based on source egress gateway selection for multi-domain optical mesh networks

Science china(Information Sciences) 2011年第2期54卷 227-235页

作者： ZHANG ShengFeng1,3, PENG YunFeng1,2, DU Shu1, YANG XiaoLong1,2 & LONG KePing1,2 1research center for optical internet and Mobile Information networks, university of Electronic Science and Technology of china, Chengdu 611731, china 2Institute of Advanced Network Technology and New Serives (ANTS), university of Science and Technology Beijing, Beijing 100083, china 3research center for optical internet networks, chongqing university of posts and telecommunications, chongqing 400065, china 1. research center for optical internet and Mobile Information networks University of Electronic Science and Technology of China Chengdu 611731 China3. Research Center for Optical Internet Networks Chongqing University of Posts and Telecommunications Chongqing 400065 China2. Institute of Advanced Network Technology and New Serives (ANTS) University of Science and Technology Beijing Beijing 100083 China

Survivability for multi-domain optical networks is becoming a key parameter due to expanding network. In order to provide the shared-path-protected lightpath in multi-domain optical mesh networks, we propose a protection solution, called GSLSSP. A new source egress gateway selecting mechanism is adopted in this solution. For each connection request, this mechanism can enable the source node to select a better egress gateway node to the destination domain and compute one inter-domain working path near the optimal path with the cooperating of this gateway node, under scalability and domain privacy constraint of multi-domain networks. And then one intra-domain link-disjoint local segment-backup path for each working-segment path is computed out in each single-domain passed by the working path. Simulation evaluation shows that the proposed scheme can provide 100% protection ability for multiple failures. Besides, it is effective in multi-domain path protection with more efficient resource utilization, lower blocking probabilities and less inter-domain cost than other schemes.

关键词： survivability optical mesh networks multi-domains multiple failures segment-shared protection

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Multi-function Device Based on Two Terahertz optical Asymmetric Demutiplexers

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Chinese Journal of Lasers 1999年第5期8卷 3-5页

作者： HONG Xiaobin LIN Jintong(optical Communication R & D center, Beijing university of posts and telecommunications, Beijing 100876, china) 北京邮电大学光通信R&D中心北京 100876 北京邮电大学光通信R&D中心北京

A multi-function device based on two terahertz optical asymmeric demultiplexers (TOAD) is proposed, which can be used simultancously as demultiplexing, data regeneration,clock recovery and wavelength conversion unit. The device can work at an ultra-high speed optical time-division multiplexing (OTDM) system with relativey low speed components.

关键词： OTDM clock recovery phase-lock loop (PLL) terahertz optical asymmetric demultiplexer (TOAD) data regeneration wavelength conversion

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无线网络下一种新的显式误码通知机制

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通信学报 2003年第8期24卷 51-57页

作者：徐昌彪隆克平杨士中重庆邮电学院光互联网及无线信息网络研究中心重庆400065 重庆大学通信工程学院重庆400044

提出了一种显式误码通知机制,并详细阐述了此机制的具体实现。理论分析和数值计算结果表明,即便是在较高误码率下,此机制仍能有效地将误码丢包显式地通知给数据源端,从而为改善无线环境下的TCP性能奠定了坚实的基础。

关键词：传输控制协议无线网络显式误码通知

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光突发交换网络中的闭环竞争解析

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通信学报 2004年第12期25卷 76-81页

作者：徐昌彪隆克平黄胜重庆邮电学院光互联网及无线信息网络研究中心重庆400065

为改善光突发交换网络(OBS)的性能,深入探讨了光突发交换网络中的闭环竞争解析,提出了OBS网络中的主动资源预留方案OBS-RED和显式竞争通知方案OBS-ECN。OBS-RED采用随机早期丢弃策略,即根据数据信道拥塞情况,随机早期地丢弃控制分组。OB... 详细信息

为改善光突发交换网络(OBS)的性能,深入探讨了光突发交换网络中的闭环竞争解析,提出了OBS网络中的主动资源预留方案OBS-RED和显式竞争通知方案OBS-ECN。OBS-RED采用随机早期丢弃策略,即根据数据信道拥塞情况,随机早期地丢弃控制分组。OBS-ECN的实现需要OBS-RED的支持。在OBS-ECN中,不是随机丢弃控制分组,而是将这一信息显式地通知边缘节点,边缘节点再作相应的处理。OBS-RED与OBS-ECN的应用,有利于提高网络吞吐量和链路带宽资源利用率,大大减少数据突发的阻塞概率。

关键词：光突发交换闭环竞争解析 OBS—RED OBS—ECN

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The Tunable Parameter Based Deflection Routing Algorithm for OBS networks

The Tunable Parameter Based Deflection Routing Algorithm for...

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2005'第四届光互联网国际学术会议

作者： Xiaolong Yang Keping Long Qianbin Chen Yujun Kuang Yun Li Sheng Huang Special research Centre for optical internet and Wireless Information networks (COIWIN) chongqing university of posts & telecommunications 400065 chongqing china

＜正＞The burst contention has a strong impact on the performance of optical burst switching （OBS） network, and currently, various contention resolution schemes have been proposed. Among them, the deflection routing is more attractive due to its looser requirement for optical buffer in capability and quantity. However, due to their unreasonable deflection controls, its conventional versions （i.e., directly drop, unconditional deflection, and limited deflection） possibly have less effect on resolving contentions when the traffic load increases. Therefore, this paper proposes the tunable-parameter deflection routing （TPDR） algorithm, which consists of the definition of a tunable-parameter （i.e., deflection probability） to control the deflecting of contending bursts, and the nonlinear programming to search the optimum deflection path in terms of the burst loss probability （BLP） and the path length. The simulation results show that it can improve the overall BLP and the BLP of each individual priority, and alleviate the offset-time deficit on QoS guarantee.

关键词： optical Burst Switching (OBS) Contention Deflection Routing Deflection Probability QoS

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STUDY ON AN ARCHITECTURE FOR MPLS-BASED HIERARCHICAL MOBILE IP TO SUPPORT IP DIFFSERV MODEL

STUDY ON AN ARCHITECTURE FOR MPLS-BASED HIERARCHICAL MOBILE ...

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2005全球移动通信大会

作者： Qian-Bin Chen Ya-Juan Liu Yun Li Yu-Jun Kuang Ke-Ping Long Special research Centre of optical internet and Wireless Information networks (COIWIN) chongqing university of posts and telecommunications chongqing 400065 china

＜正＞Because of the distinct features of Multi-Protocol Label Switching （MPLS）, such as faster table lookup and less control overhead, extends use of MPLS in mobile environments have been attracted many researches. In this paper, we present a QoS network architecture for integrating MPLS with Mobile IP （MIP） based on IP Differentiated Services （DiffServ） model and bring forward node’s functional model and procedure involved in the architecture. In addition, we implement the integration of MPLS, MIP and DiffServ in NS-2 simulator. From the simulation results, we conclude that the architecture can support DiffServ model.

关键词： Multi-Protocol Label Switching (MPLS) Hierarchy Mobile IP Protocol (HMIP) DiffServ model

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research on Protection Mechanism for EPON

Research on Protection Mechanism for EPON

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第九届全国青年通信学术会议

作者： Huandong Zhao , Zhizhong Zhang Shanghai research & Development center of china Telecom Group,200122 chongqing university of posts and telecommunications, 400065

＜正＞ Ethernet Passive optical network （EPON） technology is getting more and more attention by the telecommunication industry as the "last mile" solution. Advantages of using an EPON for local access networks are numerous. High network reliability is very important to EPON. Here the protection schemes for EPON are discussed. Firstly, four protection schemes recommended in ITU G.983.1, which also can be used in EPON too, are analyzed in detail. We analyses the merits and demerits of the four protection schemes. Based on these analyses, some new improved proposals on them are put forward.

关键词： Protection APON EPON Pre-ranging.

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A Differentiated Service Architecture for Wireless Ad Hoc networks

A Differentiated Service Architecture for Wireless Ad Hoc Ne...

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2005'第四届光互联网国际学术会议

作者： Zhao Wei-Hang Wang Yu-ling Li Yun Long Ke-ping (School of Electronic Engineering Beijing university of posts & telecommunications Beijing 100876 china) (Special research Centre for optical internet & Wireless Information networks CnongQing university of posts & telecommunications chongqing 400065 china)

＜正＞The QoS supporting is a hot researching issue in wireless ad hoc networks. In this paper, we propose a differentiated service architecture for wireless ad hoc networks. The performance of proposed architecture is evaluated by simulation. The simulation results show that the proposed architecture can provide better services for higher prioritized flows when the network resources are insufficient.

关键词： wireless ad hoc networks differentiated service architecture

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Network parameters awareness for routing discovery in autonomic optical internet

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The Journal of china Universities of posts and telecommunications 2009年第2期16卷 84-88,128页

作者： JIN Jin WANG Hong-xiang JI Yue-feng Key Laboratory of optical Communication and Lightwave Technologies,Beijing university of posts and telecommunications,Beijing 100876,china [a]Key Laboratory of optical Communication and Lightwave Technologies Beijing university of posts and telecommunications Beijing 100876 china

The article proposes a network parameter-awareness （NPA） method and applies it to routing discovery algorithms in autonomic optical internet. This NPA method can perceive the main parameters of the network, such as delay, jitter and traffic, which can represent the current situation of the network. And these parameters enable network to determine the appropriate nodes for routing discovery. The simulation results of evaluating performance of a network with NPA method and its routing applications show that the method and its applications in routing improve the performance of the network significantly with quality of service （QoS） guaranteed.

关键词： NPA autonomic optical internet self-aware muting QoS

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Spray and forward:Efficient routing based on the Markov location prediction model for DTNs

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Science china(Information Sciences) 2012年第2期55卷 433-440页

作者： DANG Fei1,YANG XiaoLong1,2 & LONG KePing2 1 research center for optical internet and Mobile Information networks(COIMIN),university of Electronic Science and Technology of china,Chengdu 611731,china 2 School of Computer and Communications Engineering,university of Science and Technology Beijing,Beijing 100083,china 1. research center for optical internet and Mobile Information networks (COIMIN) University of Electronic Science and Technology of China Chengdu 611731 China2. School of Computer and Communications Engineering University of Science and Technology Beijing Beijing 100083 China

Typical delay tolerant networks(DTNs)often suffer from long and variable delays,frequent connectivity disruptions,and high bit error *** DTNs,the design of an efficient routing algorithm is one of the key *** existing methods improve the accessibility probability of the data transmission by transmitting many copies of the packet to the network,but they may cause a high network *** address the tradeoff between a successful delivery ratio and the network overhead,we propose a DTN routing algorithm based on the Markov location prediction model,called the spray and forward routing algorithm(SFR).Based on historical information of the nodes,the algorithm uses the second-order Markov forecasting mechanism to predict the location of the destination node,and then forwards the data by greedy routing,which reduces the copies of packets by spraying the packets in a particular *** contrast to a fixed mode where a successful-delivery ratio and routing overhead are contradictory,a hybrid strategy with multi-copy forwarding is able to reduce the copies of the packets efficiently and at the same time maintain an acceptable successful-delivery *** simulation results show that the proposed SFR is efficient enough to provide better network performance than the spray and wait routing algorithm,in scenarios with sparse node density and fast mobility of the nodes.

关键词： delay tolerant networks spray and forward Markov position prediction routing algorithm

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