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检索条件"任意字段=Conference on Scalability and Traffic Control in IP Networks"

共 5941 条记录，以下是4721-4730 订阅

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WSAP: provide loss rate differentiation with active queue management

引用

International conference on Communication Technology (ICCT)

作者： Miao Zhang Jianping Wu Chuang Lin Ke Xu Department of Computer Science Tsinghua University Beijing China

ISBN: (纸本)7563506861

How to provide service differentiation on the Internet is a hot research topic. One proposal is to provide loss rate differentiation by assigning levels of drop precedence to ip packets. In this paper, we propose a new AQM mechanism, weighted SAP (WSAP) to achieve this goal. WSAP is based on a new AQM algorithm simple adaptive proportional (SAP). WSAP can approximate proportional loss rate differentiation, while keeping high link utilization and short queuing delay. Compared with WRED and RIO, WSAP is easier to configure and can provide better performance. Furthermore, an architecture for differentiated service is proposed in this paper. In the design of this architecture, we pay more attention to the characteristics of network traffic in the Internet and try to preserve the Internet's original design principles.

关键词： traffic control ip networks Quality of service Web and internet services Telecommunication traffic Computer science Proposals Delay Diffserv networks TCPip

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A virtual time simulator for studying QoS management functions in UTRAN

A virtual time simulator for studying QoS management functio...

引用

IEEE conference on Vehicular Technology (VTC)

作者： D. Soldani J. Laiho Nokia Group Nokia Networks IP Mobility Networks Finland

The issue of QoS management in the radio interface has not been widely studied and the effects of parameters and algorithms in the user and control plane on different bearer services in high traffic situation have been rarely addressed. This paper describes a virtual time simulator for studying and validating enhanced QoS management functions before their deployment throughout the UMTS radio access network (UTRAN). Several simulations have been run to look into the feasibility of such a tool, and one relevant case is discussed in this paper, where the effectiveness of radio resources utilisation and differentiation among bearer services in terms of call block ratio, throughput, queuing time, object transfer delay and served guaranteed bit rate (GB) traffic load is investigated. The simulation results show the proposed simulator to be an appropriate tool for analysing QoS management functions.

关键词： Radio spectrum management Analytical models Radio control Communication system traffic control traffic control 3G mobile communication Radio access networks Throughput Delay effects Bit rate

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Cooperation of multiple simulators for Mobile ip networks

Cooperation of multiple simulators for Mobile IP networks

引用

International conference on Advanced Information Networking and Applications (AINA)

作者： Y. Onoe Y. Atsumi F. Sato T. Mizuno Multimedia Laboratories NTT DoCoMo Yokosuka Kanagawa Japan Graduate School of Science and Engineering Shizuoka University Japan Faculty of Information Shizuoka University Hamamatsu Shizuoka Japan

In the field of mobile communication, not only has the scale of network environments increased over the last few years, but there has also been a steady increase in the diversity of mobile communication protocols and service applications due to the spread of mobile Internet applications. To enable these networks to be designed and developed efficiently, it is therefore necessary to have some way of simulating entire systems in order to evaluate different schemes, predict the traffic levels and try out alternative designs. In this study, we simulate a large-scale wide-area mobile Internet environment by allowing multiple existing simulators to cooperate with each other. Specifically, by calling a wireless data link protocol software simulator on an OPNET from an ns-2 simulator running a wide-area network simulation, we have conducted a simulated evaluation of a TCP/ip communication protocol suite including a W-CDMA environment, thereby confirming the validity of this approach.

关键词： ip networks Mobile communication Wireless application protocol Web and internet services Predictive models Telecommunication traffic traffic control Large-scale systems TCPip Multiaccess communication

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Implementing QoS capabilities in ipv6 networks and comparison with MPLS and RSVP

Implementing QoS capabilities in IPv6 networks and compariso...

引用

Canadian conference on Electrical and Computer Engineering (CCECE)

作者： E.-B. Fgee W.J. Phillips W. Robertson S.C. Sivakumar Department of Engineering Mathematics Dalhousie University Halifax NS Canada Faculty of Commerce Saint Mary''s University Halifax NS Canada

With the growth of the Internet and intranets, and the use of multimedia applications, video and audio streams, QoS (quality of service) technology has become more relevant and important Yoram Bernet (2000). The next generation Internet protocol (ipv6) provides more features than ipv4 such as more address space and new fields that can be used to enhance and make the usage of ip networks more frequent even with sensitive traffic flows. Current ip networks provide best effort traffic delivery since no QoS features were implemented so other protocols are used to guarantee requests for sensitive traffic flows. ipv6 has implemented two fields that can be used as tools to implement QoS, the two fields are, flow label and traffic class. Flow label is a 20 bit field used by a source to label sequences of packets for which it requests special handling by ipv6 routers. traffic class is used to indicate the priority level of the traffic flow. ipv6 routers will look at the flow label field plus source address to process the flow packets Silvia Hagen (2002). In this paper, we will investigate ipv6 based end-to-end QoS methodology on quality of service parameters such as end-to-end delay, packet loss and throughput delay using simulations performed with network simulator (NS) Ref.3. The results obtained will be compared with two traditional end-to-end quality of service methods, viz., MPLS (multiprotocol label switching) and RSVP (resource reservation protocol).

关键词： Multiprotocol label switching Quality of service Telecommunication traffic ip networks Protocols Streaming media Space technology Web and internet services Next generation networking traffic control

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QoS constrained ip routing

QoS constrained IP routing

引用

Canadian conference on Electrical and Computer Engineering (CCECE)

作者： Z. Khan H. Hassanein School of Computing Queen's University Kingston ONT Canada

We propose an integrated routing protocol (IRP) as a solution to the delay-constrained least-cost routing problem. To guarantee the real-time delivery of packets, IRP establishes QoS channels in two stages: a forward routing stage and a backward setup stage (FRBS). Establishing a connection that provides a guaranteed service involves routing, signaling, call admission, and resource reservation. A comprehensive simulation model is developed to study the performance of the proposed scheme under different traffic characteristics and network parameters. Preliminary performance result shows that IRP enhances the probability of call acceptance by providing multiple paths choices between single pair of source and destination node. IRP is also shown to adapt better to changes in network paths and link characteristics as it achieves low call blocking ratios.

关键词： Delay Routing protocols Resource management Call admission control Telecommunication traffic traffic control Unicast Internet Communication system traffic control ip networks

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A distributed admission control model for CoS networks using QoS and SLS monitoring

A distributed admission control model for CoS networks using...

引用

IEEE International conference on Communications (ICC)

作者： S. Lima P. Carvalho A. Santos V. Freitas Department of Informatics University of Minho Braga Portugal

Achieving an admission control strategy for CoS networks covering both intra-domain and end-to-end operation is still an open issue. This paper discusses how AC can be carried out without adding significant complexity to the network control plane and proposes a distributed service-oriented AC model for these networks. The model only involves the network edge nodes leaving the network core unchanged. Ingress nodes perform implicit or explicit service-dependent AC based on both QoS and SLSs utilization metrics, obtained through edge-to-edge online monitoring performed at egress nodes. From an end-to-end perspective, the flow request is used both for AC and available service computation. Relevant aspects of the model interrelated areas and implementation key points are also discussed.

关键词： Admission control Laser sintering traffic control Communication system traffic control Condition monitoring Informatics Computer architecture ip networks Proposals Computational modeling

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Multicast loss recovery with active injection

Multicast loss recovery with active injection

引用

International conference on Computer Communications and networks (ICCCN)

作者： J. Peng B. Sikdar Electrical Computer and Systems Engineering Department Rensselaer Polytechnic Institute Troy NY USA

It is well known that request suppression, local recovery and retransmission scoping are the three crucial elements for scalability and efficiency in multicast loss recovery. None of existing multicast loss recovery schemes can simultaneously have good performance in all the three aspects without introducing significant overhead. The scheme proposed in this paper approaches the multicast loss recovery issue from a new perspective and achieves good performance in all the three aspects with very limited overhead. Our analysis shows that the proposed scheme has a significantly better overall performance as compared to existing schemes.

关键词： Performance loss scalability Systems engineering and theory Economic indicators Performance analysis Communication system traffic control Delay Contracts Unicast Production

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Using virtual Sip links to enable QoS for signalling

Using virtual SIP links to enable QoS for signalling

引用

IEEE International conference on networks

作者： A.A. Kist R.J. Harris RMIT University Melbourne VIC Australia

The session initiation protocol (Sip) was used on a large scale as a session signalling protocol to provide legacy as well as new services. The 3rd Generation Partnership Project (3GPP) has decided to use the Sip protocol in the ip multimedia subsystem of future Universal Mobile Telecommunications System (UMTS) networks. If the Sip protocol is used in carrier grade networks, quality of service (QoS) observations are necessary to ensure quality service provisioning. This, in particular, is important since signalling will use multiservice ip transport networks and share its resources with other services. This paper proposes the concept of virtual Sip links (VSLs) that connect two Sip nodes. VSLs can be used to enable QoS provisioning in Sip signalling overlay networks. Methodologies are introduced to specify, define and dimension these virtual connections. The VSL specification uses the well-known concept of leaky buckets. Simple methodologies are established that are based on known results, to calculate message loss probabilities (MLPs) in leaky buckets. A simple, but efficient, queueing scheme is introduced that reduces the required network resources. Simulation results are given to validate the used models and to underline performance advantages for connections that use VSLs.

关键词： Quality of service ip networks Telecommunication traffic Telephony Transport protocols Large-scale systems traffic control Australia 3G mobile communication Probability

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User plane firewall for 3G mobile network

User plane firewall for 3G mobile network

引用

IEEE conference on Vehicular Technology (VTC)

作者： R.L. Gopal Tat Chan Ti-Shiang Wang Nokia Research Center Burlington MA Nokia Research Center Burlington MA USA

Adoption of Internet protocol (ip) in third generation (3G) wireless network systems opens up new attacks to mobile devices. In this paper we investigate various user plane threats and propose mechanisms to defend those attack. We then specify a mechanism to distribute user plane firewall filters seamlessly with the help of policy management.

关键词： Transport protocols Wireless networks Web and internet services Protection Mobile handsets ip networks Telecommunication traffic Communication system traffic control Batteries Access protocols

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High performance platform for multiple OpenAPIs

High performance platform for multiple OpenAPIs

引用

International conference on Telecommunications (ICT)

作者： S. Tanaka H. Shina T. Yamada S. Shiraishi NTT NTT Network Service Systems Laboratories Musashino Tokyo Japan

The amount of network traffic, especially data traffic, has grown rapidly in recent years. For data traffic, connectionless network is more suitable than connection-oriented network. Voice over ip (Voip) technologies are becoming practical. Call agents are being developed for the next generation network, called NGN-CA. They control various network elements and provide Voip telephony services and multimedia services. NGN-CA provides OpenAPI, which is standalized application programmer interface to control various network elements. Although various applications using OpenAPI are written, ordinary call agent supports only one OpenAPI because there is difference among call models of OpenAPIs. A call model has been proposed combining multiple OpenAPIs, especially JAIN CC and Parlay MPCCS and a high performance implementation supporting multiple OpenAPIs by using the combined call model. Various applications written in different OpenAPIs can be installed on the implementation and these applications can provide services on a call simultaneously.

关键词： Application software Communication system traffic control Internet telephony Telecommunication traffic traffic control Next generation networking Web and internet services Laboratories Programming profession ip networks

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