With the "bandwidth-on-demand" as a promising service provisioning model for next-generation ip over WDM optical networks, online traffic grooming emerges as a fundamental issue. This paper studies the perfo...
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With the "bandwidth-on-demand" as a promising service provisioning model for next-generation ip over WDM optical networks, online traffic grooming emerges as a fundamental issue. This paper studies the performance analysis of the multihop online traffic grooming algorithm in mesh WDM optical networks, and develops a theoretical performance analysis model.
In a multipath network with a naive traffic partitioning scheme, varied packet loss rates as well as varied delays on multiple paths could seriously reduce TCP bandwidth. We propose a scheme, called dial-controlled ha...
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In a multipath network with a naive traffic partitioning scheme, varied packet loss rates as well as varied delays on multiple paths could seriously reduce TCP bandwidth. We propose a scheme, called dial-controlled hash (DCH), for dynamically partitioning traffic flows across multiple paths. DCH allows for fine-grained load balance, minimizes path oscillation for each traffic flow, and does not require per-flow state maintenance or packet tagging. We evaluate DCH in two simulated networks, a parallel link topology and a corporate intranet with trace-based traffic generation. In both simulations, we compare the proposed scheme to a number of alternatives. DCH reduces path oscillation by a factor of 1.6-37 and improves TCP bandwidth by up to 66that, without a good flow partitioning scheme, there is a limit on how much one can save by using low-quality networks in combination with high-quality ones.
Peer-to-peer (P2P) technology is attracting attention as a foundation for major next-generation Internet applications, and is already in widespread noncommercial service. However, networks are currently designed and m...
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Peer-to-peer (P2P) technology is attracting attention as a foundation for major next-generation Internet applications, and is already in widespread noncommercial service. However, networks are currently designed and managed on the assumption of client-server Web traffic. So, future growth in peer-to-peer traffic will introduce novel considerations to the design and management of networks. In this paper, we define models for peer-to-peer and client-server traffic, and evaluate several network topologies from the viewpoint of traffic volume and the variation of traffic on each link. We clarify the characteristics of network topologies that make them suitable for handling growth in the proportion of peer-to-peer traffic.
In a QoS-enabled network environment, there are two major concerns from both user's and provider's points of views: are there enough resources available for a particular traffic flow and what is the price for ...
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ISBN:
(纸本)1402074182
In a QoS-enabled network environment, there are two major concerns from both user's and provider's points of views: are there enough resources available for a particular traffic flow and what is the price for this flow? These two questions are exactly what admission control and pricing try to answer. An architecture that integrates pricing and admission control seems very promising. In this paper, we propose a tariff-based pricing architecture that integrates pricing and admission control for the DiffServ networks. We also study some pricing setting strategies for our architecture and evaluate our strategies through simulations.
traffic engineering is aimed at distributing traffic so as to "optimize" a given performance criterion. The ability to carry out such an optimal distribution depends on both the routing protocol and the forw...
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traffic engineering is aimed at distributing traffic so as to "optimize" a given performance criterion. The ability to carry out such an optimal distribution depends on both the routing protocol and the forwarding mechanisms in use in the network. In ipnetworks running the OSPF or IS-IS protocols, routing is over shortest paths, and forwarding mechanisms are constrained to distributing traffic uniformly over equal cost shortest paths. These constraints often make achieving an optimal distribution of traffic impossible. In this paper, we propose and evaluate an approach, based on manipulating the set of next hops for routing prefixes, that is capable of realizing near optimal traffic distribution without any change to existing routing protocols and forwarding mechanisms. In addition, we explore the tradeoff that exists between performance and the overhead associated with the additional configuration steps that our solution requires. The paper's contributions are in formulating and evaluating an approach to traffic engineering for existing ipnetworks that achieves performance levels comparable to that offered when deploying other forwarding technologies such as MPLS.
In this paper, we propose a call admission control (CAC) scheme for wireless cellular networks supporting self-similar data traffic, which is rarely discussed in previous literature. The grade of service (GoS) at the ...
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In this paper, we propose a call admission control (CAC) scheme for wireless cellular networks supporting self-similar data traffic, which is rarely discussed in previous literature. The grade of service (GoS) at the call level is represented by handoff call dropping probability, while the quality of service (QoS) at the packet level is represented by transmission accuracy and delay. The effective bandwidth for the data traffic is derived to support the QoS requirements. The user and call transition functions are derived to compute the handoff call dropping probability. The proposed CAC scheme is to ensure satisfaction of both QoS and GoS, and to achieve maximal resource utilization.
In this paper, we proposed a DiffServ based multicast media gateway, which is called adaptive differentiated service multicast gateway (ADMG), to achieve the QoS guarantee and scalability considerations for multimedia...
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ISBN:
(纸本)0780379659
In this paper, we proposed a DiffServ based multicast media gateway, which is called adaptive differentiated service multicast gateway (ADMG), to achieve the QoS guarantee and scalability considerations for multimedia presentation systems. The purpose of the ADMG system is twofold: (1) improve the bandwidth utilization by doing bandwidth reservation based on the layered-media aggregation and (2) improve the receiving quality of the layered media streams while the network is under heavy traffic by dynamically adjusting the sending rate according to the networking situation.
We present an active queue management policy and we study its ability to steer, in a distributed fashion, an entire TCP/ip network into global max-min fairness of its long-lived flows. A previously proposed technique,...
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We present an active queue management policy and we study its ability to steer, in a distributed fashion, an entire TCP/ip network into global max-min fairness of its long-lived flows. A previously proposed technique, initially applicable to circuit-switched networks and feedback-based flow controlnetworks is adapted to the realities of packet-switching and TCP flow/congestion control, together with a per-hop policy, called FairShare. The proposed solution is evaluated using several example topologies, including linear, loop, and irregular topologies as well as dynamic load fluctuations.
This paper proposed a sort of self-organizing ip QoS architecture based on adaptive edge control (QAAC) and presented its routing realization algorithms (called DSQR, distributed scalable QoS routing algorithm). In QA...
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ISBN:
(纸本)0769520332
This paper proposed a sort of self-organizing ip QoS architecture based on adaptive edge control (QAAC) and presented its routing realization algorithms (called DSQR, distributed scalable QoS routing algorithm). In QAAC architecture, active probe would cooperate with passive regulate and artificial intelligence would control the proportion of probe packets, chromosome packets and information packets, in order to provide effective QoS for users. This architecture can enhance network adaptive and scalable through the user's adaptive and self-organizing behaving and QAAC will coexistence with traditional best effort services and architectures. The simulation results show that QAAC and DSQR are effective and applied to provide preferable service. This will accommodate the next generation network development and application requirements much more.
The unique nature of mobile ad-hoc networks (MANETs) imposes several challenges when providing QoS. traffic travelling on a MANET can be local traffic arriving from and targeting a node within the ad-hoc network. Traf...
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The unique nature of mobile ad-hoc networks (MANETs) imposes several challenges when providing QoS. traffic travelling on a MANET can be local traffic arriving from and targeting a node within the ad-hoc network. traffic that is not local to the MANET is likely to travel over fixed networks that employ DiffServ, IntServ, or a combination of both. This paper investigates the interaction and the relation between a MANET network and a hosting access domain that provide QoS support potentially based on two distinct paradigms (namely IntServ, and DiffServ). The objective is to achieve a high level of autonomy. In this paper we propose a framework solution to the inter-domain agreements and the use of aggregate RSVP for collective resource reservations.
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