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In next generation wireless networks like WiMAX, a dynamic Call Admission Control (CAC) plays an important role to ensure Quality of Service (QoS) of existing users and to efficiently utilize network resources. We propose a predictive CAC namely Wireless Fair Intelligent Admission Control (WFIAC) that admits or rejects a new incoming connection base on resource availability and load in the network...
While optimization models for traffic engineering in multi-service networks are known, survivability is a key issue not introduced so far in consideration in such models. In this paper, the novelty and contribution is that new optimization models that address the off-line survivability-supported Traffic Engineering (TE) problem in multi-service networks are presented. In such networks traffic demands...
Data request task scheduling is one of the important issues for P2P VoD systems. However the existing data scheduling strategies in P2P VoD system is not fair enough. They make many nodes, which upload data actively, bear very heavy load, while those selfish nodes providing no resource sit idle. This paper presents an admission control strategy on serving nodes combining with the incentive mechanism...
We present a server selection and admission control algorithm for IPTV networks that uses available bandwidth estimation to assess bandwidth available on the path from an end-user point of attachment to one or more IPTV content servers and that employs a revenue maximising admission decision process that prioritizes requests for high revenue content item types over requests for lower revenue item...
Wireless mesh networks (WMNs) have become immensely popular these days. In order to satisfy user service requirements, multimedia applications need quality of service (QoS) support. Since the mesh routers are usually stationary in WMNs, a better performance is expected in WMNs as compared to ad hoc networks. But sustaining QoS in wireless mesh networks still remains a challenging task. A fundamental...
Wireless mesh networks (WMNs) have recently emerged as a promising technology for next-generation of wireless communications. In WMNs, admission control is deployed to control traffic loads and to prevent the wireless mesh backbone from being overloaded. Existing admission control protocols could be classified as either stateful or stateless approaches, based on network state information. Both the...
Service providers offering IP-based video on demand services often replicate video content in multiple content servers with different network points of attachment. When a request for a content item arrives from an end-user, a decision must be made as to whether the request should be admitted and, if so, which server should be used. To ensure adequate quality-of-service this admission control / server...
Call admission control plays an important role in International Telecommunication Union-Telecommunication Standardization Sector (ITU-T) Quality of Services (QoS) architecture of next generation network (NGN). We extend both BPC and BPC-IF call admission control [23] to exploit their capability of robustness and fairness in response to the variation of network status. Simulation results show that...
Accessing remote services in mobile ad hoc networks (MANETs) can be slow and sometimes impossible due to frequent disconnection of mobile nodes. Caching techniques can be used to improve the service accessibility and the network performance. In this paper we propose a replication based caching strategy that uses wisely the cache redundancy to overcome the latency problem that exists in the cooperative...
Wireless Mesh Networks (WMNs) have emerged as a key technology for next generation wireless networks showing rapid progress and inspiring numerous applications. Advanced antenna techniques, scheduling algorithms, admission control and routing schemes have attracted increased research interests aiming to optimize the performance of WMNs and satisfy their vast and diverse traffic requirements. However...
The Quality of Service (QoS) support of multimedia services over wireless Mobile Ad hoc Networks (MANETs) is one of the hottest challenges facing todays research community working on this area. Most existing works on QoS in ad hoc networks has been carried out under the assumption that the underlying QoS architecture is reservation based. In such architecture, mobile nodes maintain per-flow state...
In recent studies, an equal-spacing-based (equal-SP) design was developed to generalize and enhance the reference design in IEEE 802.11e standard. Different from the reference design in which all streams will be scheduled in a common minimum spacing, the equal-SP design may schedule different streams with different spacings and it might improve bandwidth utilization of the reference design, up to...
In this paper, we propose a new dynamic resource allocation (DRA) scheme to support the constantly increasing online video stream traffic, especially high definition (HD) video streams. Our DRA scheme is based on online traffic prediction using seasonal time analysis. Our scheme seeks to provide accurate traffic prediction, to minimize the resource negotiation frequency, and to increase the utilization...
This paper considers optimizing the utilization of radio resources in a heterogeneous networks consisting of a WLAN and a CDMA network. We propose a joint admission control mechanism for multimedia traffic that exploits vertical handoff as an effective tool to enhance radio resource management while guaranteeing handoff user's QoS requirements. The network resources utilized by the vertical handoff...
Recent technological advances in miniaturization and wireless communication have made Wireless Sensor Networks an active research field. The increasing number of multimedia and real-time applications for Wireless Sensor Networks has led to a growing interest in Quality of Service for this category of networks. In this paper, we propose a QoS-geographic and energy aware routing protocol for Wireless...
This paper proposes a novel admission control architecture for video-on-demand servers, which provide deterministic guarantees on the maximum delay of video traffic and increase the network resource utilization. The framework take advantage of the fact that stored video streams can be processed off-line to calculate the space and time parameters in order to estimate its effective bandwidth under the...
This paper considers optimizing the utilization of radio resources in a heterogeneous networks consisting of a WLAN and a CDMA network. We propose a joint admission control scheme for multimedia traffic that exploits vertical handoffs as an effective tool to enhance radio resource management while guaranteeing handoff users' QoS requirements. The network resources utilized by the vertical handoff...
In this paper, we extend unicast admission control based on path segment measurement technique to multicast environment. The proposed scheme does not impose any requirements on the network routers other than the ability to prioritize the packets. We develop an edge probing mechanism that measures a segment of the network path instead of measuring the full path. With path segment probing, we show that...
This paper introduces a novel admission control algorithm called dynamic measured sum (DMS), which is based on active measurements of the actual load. The kernel of the algorithm is the dynamical adjustment of the measurement period length, which hence enables a better matching to the traffic changes and results in an obvious improvement of delay performance. Furthermore, the multi-class admission...
Quality of Service (QoS) support for traffic plays an important role in Wireless Sensor Networks (WSNs). In WSNs, traffic is usually a mix of time-sensitive packets and reliability-demanding packets. Hence, admission control regardless of the characteristics of packets is not efficient. In this paper, taking both delay and reliability into account, we propose a novel admission control algorithm for...
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