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In this paper a flow-based model balancing queues at the nodes of MPLS-network is proposed. The novelty of the model is that it, in the contrast to the previously known models takes into account the features of the Traffic Engineering Queues technology. This technology has a purpose to ensuring load balancing of the node buffer resource.
Distributed stream processing relies on in-network operator placement to achieve an optimal resource allocation which can use the pool of machines and network resource efficiently. Due to the QoS (Quality of Service) constraints imposed by the application, operator placement is usually treated as an optimization problem with constraints. Trying to get a global optimization is challenging since it's...
Overlay multicast is an effective approach to the problem of streaming distribution. Other approaches proposed for streaming, i.e., unicast transmission and IP multicast have several drawbacks. The former method is not scalable with the growing number of users. The latter method - IP multicast - requires strong cooperation with ISPs (Internet Service Providers) what is not always realizable due to...
For the multi-constrained routing problem, there are several constrained parameters such as the bandwidth, delay, packet loss rate, delay jitter, the QoS parameters influence each other. It has been proved as a NP-Complete problem, traditional linear method often have some difficulties in solving this problem. The application of ant colony algorithm or genetic algorithm often has a slow convergence...
In order to evaluate the influence of neighbors' quality to P2P streaming system's performance during scheduling, this paper establishes a markov chain based differential function model to analyze the relationship between peer's average startup delay and probability neighbors have wanted data as well as neighbors' available upload bandwidth. This paper also proposes a scheduling feedback algorithm,...
The problem how to improve the quality of server(QoS) of the heterogeneous network must be studied and solved, for long round trip times (RTTs), not negligible packet error rates (PER), and downlink-uplink asymmetry, etc. Posing new challenges to the QoS given by transmission control protocol (TCP). the paper proposes a Diff-selective(diff-sel) policy, which can solve the problem by selecting different...
Anycast is a new type of communication service, and has been defined as a standard communication mode of the IPv6. With the more and more application need of anycast service, anycast routing problem (ARP) has recently become an important topic to study. An anycast routing algorithm based on genetic algorithm and particle swarm optimization is proposed in this paper. The algorithm overcomes the disadvantages...
The key challenges of the QoS-oriented satellite MAC technology are conditioned mainly by long-delay space medium. They represent phenomena of MAC's performance degradation (ldquotime barrierrdquo) and dynamical instability (ldquodynamic barrierrdquo) which appear when the propagation time increases. The delay-tolerant MACs should guarantee an effective overcoming of both barriers. We showed that...
The problem of computing the bandwidth-delay-constrained least-cost QoS multicast routing is a NP-complete problem. A novel shuffled frog leaping (SFL) algorithm is proposed to deal with the Qos multicast routing problem effectively and efficiently in this paper. The experimental results show that the proposed algorithm can find optimal solution quickly and has a good scalability.
The quality of service, in networks, aims at improving communication behavior under a correct data transmission and an optimal use of resources. It is the degree of users' satisfaction of services that a communication system provides. In this connection, the quality of service in multi-hop networks, including MANETs, poses various problems than in wired networks. It requires that the network complies...
While IEEE 802.16 standardizes the PHY and MAC layers of wireless metropolitan area networks (MAN), optimal scheduling which is crucial in providing QoS, remains to be an open issue. In this paper, we propose an optimization based uplink scheduling algorithm which aims at maximizing the throughput while guaranteeing the negotiated QoS parameters for all connections. Unlike typical strict priority...
Anycast is a new ldquoone-to-one-of-manyrdquo communication method in IPv6 networks. QoS anycast routing problem is a nonlinear combination optimization problem, which is proved to be a NP complete problem. Based on improved particle swarm optimization algorithm, an anycast routing algorithm with multiple QoS constraints is proposed. This algorithm uses a special add operator to make the worst path...
The problem of social utility maximization for transmission services over a shared network link is addressed. The standard approach to such case, based on problem decomposition and optimal bandwidth allocation through adequate price setting, is extended towards a case where packet delay impacts user utility. A simple yet realistic class of functions modeling utility is proposed. A price-driven allocation...
This paper explores the attributes, layering models and objective functions in cross layer designs for mobile ad hoc wireless networks by taking all the statistical characteristics and constraints from the physical (PHY) layer, media access control (MAC) layer and network (NET) layer into consideration. This paper reviews the entire network optimization across all the PHY/MAC/NET layers. At the PHY...
Equivalent bandwidth (EqB) is defined as the minimum service rate to be provided to a traffic buffer to guarantee a certain degree of quality of service (QoS) in terms of objective parameters (packet loss, delay, jitter). EqB techniques are usually obtained analytically for homogeneous traffic trunks, with respect to a single QoS constraint. Modern network solutions often imply the aggregation of...
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