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Streaming of video over wireless heterogeneous networks coping with the problem of packet loss which affects the perceived video quality. The service providers usually use the Peak Signal to Noise Ratio PSNR as a metric measure for the quality of their provided service. So they use the quality of service QoS of the network as a sign on the quality of their presented service. The QoS deal with the objective tests of the provided service, which mean the measure of PSNR of the presented objects. The presented objects may not get the satisfaction of the network users due to many factors although that the PSNR of the used service is enough for presenting the service. Recently the service providers use the Quality of Experience QoE term which deal with the subjective test of the presented object (i.e. the user satisfaction measure). In this paper we propose a new model to identify the importance or the significance of the role of the QoE assessment for the service providers. To verify our proposed model we did a referendum for 55 participants in order to assess their judgment on the quality of some presented videos. The results of the referendum match the consideration of the proposed model.

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In the article mathematical model for routing in the MPLS network is proposed. Also method of two-level routing on the basis of goal coordination principle in the MPLS network is offered. The method is used to increase the scalability of flow-based routing strategies.

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Considered the MPLS network is the future for all the needs and applications of networks and most efficient .With the development of companies and organizations to keep pace with the ever-changing business climate, companies’ networking needs are becoming more dynamic. Their networks must be able to transfer sophisticated applications quickly and efficiently while minimizing costs. MPLS is a technology that can be very beneficial to companies and this paper outlines what MPLS is, the benefits that MPLS delivers and how MPLS can satisfy companies -networking requirements. But the problem is when they went all the companies and service providers to the Internet Protocol IP, it has become important to find a more efficient way approve of this type of approach, MPLS simplifies the network infrastructure by allowing the improvement of multiple technologies and applications such as voice, video and data. MPLS provides enhanced security & high availability through the below-mentioned theories & analysis we can see that the MPLS is faster than traditional routing technique. If we can improve hardware facilities and software platform by real-time routers then we can notice the significant difference. This is indicated by the work paper from improving the performance of data transfer to ensure confidentiality and speed of transfer.

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Having frameworks that allow the implementation of personal agentson mobile devices, such as JADE- LEAP, is essential towards afuture massive deployment of service-providing agents and theirwidespread social acceptance. This paper presents how JADE-LEAPmay be used to implement a personal agent on a Mobile device. Thisagent belongs to a multi-agent system that allows the user to requesta URL. The personal agent communicates wirelessly, via Wi-Fi, withthe rest of the agents of the multi-agent system, in order to serve theuser the required files. This work produces better quality inperformance through the reduction of over-head traffic by localizingdata transfer. The localization will affect the total bit rate, increasethe availability and reduce latency.

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The multicast technology implements a very high-efficiency point-to-multipoint data transmission over IP networks (IPv4 and IPv6). Multicast reduces network load, eliminates traffic redundancy, and saves network bandwidth. Therefore, multicast used widely in LAN/WAN applications such as online games, video conferencing and IPTV. The multicast technology implements varied protocols such as DVMRP(Distance Vector Multicast Routing Protocol), MOSPF(Multicast Open Shortest Path First), or PIM-DM (Protocol Independent Multicast- Dense Mode) which considered source tree type, while PIM-SM (Protocol Independent Multicast- Sparse Mode) and CBT (Core Based Tree) uses shared tree. Current paper focuses on the performance evaluation of the two multicast protocols: PIM-SMv4 and PIM-SMv6 based on QoS metrics like throughput, jitter, datagram loss and Data received. PIM-SM over IPv6 showed good results compared with PIM-SM over IPv4 by 1.04%, 0.64%, 32.56% and 89.84% in terms of data received, throughput, jitter and datagram loss respectively .GNS3 simulator/emulator and JPERF used to evaluate this performance

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Broadband satellite is playing a main role in provision global coverage and onboard processing ability over IP networks to assess user applications. In order to lower the cost, get better security, solve IPv4 addressing limitation, expand the expected advantages of modern routing and mobility characteristics; the next-generation satellite systems ought to support IPv6 and seamlessly incorporate with terrestrial networks including wireless local loops. Satellite communication links have a number of limitations compared to terrestrial communications networks such as large delay and high header overhead for IPv6 consumes the bandwidth and causes lower transmission effectiveness; however, the quality of service (QoS) (such as delay, jitter, and goodput) is adversely influenced by these demerits. Current paper proposes UDP/IPV6 header compression over Multi-Protocol Label Switch (MPLS) via satellite scheme called (MPLSHCompViaSat). The aim of the proposed scheme is to save the required bandwidth in order to provide better network utilization and consequently improves the efficiency and QoS. For the sake of performance evaluation, the proposed scheme has been tested using Network Simulator (NS2).

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One of the Quality of Service (QoS) routing problems is link-constrained, path constrained routing, and example of such problem is delay and bandwidth-constrained routing. Here, the proposed solution is presented through our proposal routing algorithms DCUR-AB (Delay Constraint Unicast Routing at Available Bandwidth) and ADCUR-AB (Adaptive Delay Constraint Unicast Routing at Available Bandwidth). DCUR-AB and ADCUR-AB routing algorithms are proposed to solve the most popular QoS problem (Delay-constrained routing problem). Our proposed algorithms solve this problem in addition to take into account one of the important network resource (bandwidth).From experimental results for DCUR-AB it is found that this algorithm has a limitation searching to find the optimal path with taking into account the bandwidth constrained, therefore; it is proposed here another routing algorithm called ADCUR-AB that has a wide search to find the optimal path, then a practical comparison between the two proposed algorithms results is applied and it is found that the second algorithm is better than the first one.

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In this paper, new analysis and performance of robust error-model are presented for MPEG-4 video stream over wireless point-to-point network. Analytical expressions assume a noisy wireless environment causing frequent and random bit errors associated with packets. By this model, the temporal video scalability can be evaluated under TCP-Friendly Rate Control (TFRC) transmission when the Bose-Chaudhuri-Hochquenghem (BCH) channel coding is employed as a forward-error- correction (FEC) at a radio link layer. A FEC provides an efficient throughput access on wireless network. The numerical results clearly indicate that a quality of service (QoS) can be improved at low channel SNR region when the maximum channel coding throughput is achieved.

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AbstractQuality of service (QoS) is a corner stone in recent Internet applications. One of the requirements of achieving QoS in routers is scheduling algorithms. Priority Queuing (PQ) is the simplest most used scheduling algorithm. This algorithm may cause starvation in less priority queues. Time Expired (TE) algorithm is a refine of PQ which discards packets that would reach the receiver out of time. Thus improving throughput and delay for less priority queues with the discard of retarded usefulpackets in time sensitive – loss tolerant Internet applications. A simulation study using OPNET Modeler is carried out. The results show a 20% improvement in throughput of less priority applications. The delay performance is improved for all applications by a factor of 4% to 42% Keywords: QoS, Scheduling Algorithms, Priority Queuing Algorithm,OPNET

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Traditionally, path selection within routing is formulated as a shortest path optimization problem. The objective function for optimization could be any one variety of parameters such as number of hops, delay, cost...etc. The problem of least cost delay constraint routing is studied in this paper since delay constraint is very common requirement of many multimedia applications and cost minimization captures the need to distribute the network. So an iterative algorithm is proposed in this paper to solve this problem. It is appeared from the results of applying this algorithm that it gave the optimal path (optimal solution) from among multiple feasible paths (feasible solutions).

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