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Attempts by the research community to meet expectations arising from future Internet systems, and specifically to provide Quality of Service (QoS) for multimedia multi-user sessions, have resulted in mechanisms such as MultiUser Aggregated Resource Allocation (MARA). Its results have been promising, mainly because it drastically reduces signaling and processing overhead, despite its limitations in...
Recently cognitive radio based dynamic spectrum access techniques have been anticipated to solve the problem of spectrum scarcity and spectrum under-utilization. With multiple cognitive radio network operating in a given region, a network has to mitigate the harmful effects of interference from licensed users and other cognitive radio networks. To this end we propose a self co-existence protocol for...
The transmission of mobile video in wireless networks encounters several problems such as limited bandwidth and unstable data transmission, which are rather bad for smooth and high-quality video play. This paper proposes a novel QoS model, which adjusts the video quality dynamically to make the clients accept the videos with different bit rates smoothly during playing. This model makes the video bit...
Ant colony optimization algorithm is widely used in various NPC problems for the global optimization, self learning ability and other characteristics, and achievements were made in WSNs field. Based on the study of Ant colony algorithm, in this paper, we propose a new energy-effective QoS routing algorithm. The algorithm is to speeds up the convergence of ant colony algorithm by using SNGF to optimize...
This article proposes a method of video transmission by partition based on network differentiated service. The method firstly divides videos spatially and temporally into partitions according to a significant area deciding algorithm, and then establishes QoS indexes and set the service type for different video partitions according to network available bandwidths and MPEG-4 frame types. Using different...
Voice over IP (VoIP) is increasingly replacing fixed line telephone systems globally due to lower cost, call quality improvement. More and more application improvement and Video communication is emerging as an alternative to traditional public communication. End-to-end QoS for large Enterprise consists of three general areas: cutomer premises QoS ("LAN QoS"), Service Provider (SP) core network...
Online game's traffic becomes one of the important traffic over the Internet. In last decade, popularity of the Massively Multiplayer Online Game (MMOG) rapidly increased. Most of MMOG are constructed based on client-server architecture. MMOG needs a network with very low-latency point-to-point in upstream direction and low-latency broadcasted from server to client in downstream direction. In the...
Mobile Network Operators (MNOs) are currently facing challenging times. With flat revenues and intense competition from ‘Over The Top’ (OTT) providers, they are searching for new opportunities that will enable revenue growth. The impending migration towards LTE presents a number of challenges as well as opportunities, especially in the area of Policy Control. The Evolved Packet Core (EPC) architecture...
In this paper, we design an architecture to implement a QoS system based on OpenFlow. The system can filter malicious packets that have no permission to gain quality of service, and can guarantee scheduling the fastest path for QoS packets in working network. By predicting and estimating current network flows, we implement to assign optimal path for QoS flow without affecting the rest of the normal...
With the development of the server virtualization technology and the rapid growth of network applications, datacenters have received significant attention because of its cost-effective and promising for large date storage, HPC, cloud computing and diversified network services and applications. Similar to the CPU and memory resource, the network should be shared by co-located tenants in a manner of...
Transition to Next Generation Networks is likely to raise questions about how inter-operator interconnections should take place in a heterogeneous environment. The NGN architecture introduces several degrees of complexity, requiring decisions on issues like the layers and planes at which the interconnection among different service provider. domains should take place and how adequate quality of service...
This paper explores the feasibility of Exascale Cloud Computing over the Nobel-EU (European Union) IP backbone network. The EU represents an attractive environment for Exascale Cloud Computing, due to its well-established IP infrastructure with relatively low edge distances. An Exascale Cloud Computing system linking hundreds of data-centers can interconnect potentially millions of servers, considerably...
Recent advances in information and communication technology resulted in increased use of multimedia applications. Multimedia transmission over Mobile Adhoc Networks (MANETs) with high Quality of Service (QoS) is a challenging task due to mobility of the nodes. The problems associated with multimedia transmission are loss of packets or frames and delay in receiving the packets at destination. To maintain...
In this paper we introduce a mathematical model to analyze the performance of Wi-Fi networks carrying voice calls, TCP controlled file downloads, and video streaming traffic. We derive the voice call capacity, TCP throughput, video streaming throughput, and bandwidth utilization using the proposed five-dimensional Markov model. We show that there exists a correlation among the queue size of client...
The integration of EPON and WiMAX access networks has demonstrated considerable promise as an access solution applicable to the architecture of Fixed Mobile Convergence (FMC). The complementary features of these two systems provide high bandwidth and mobility, while reducing network deployment costs. Despite the fact that many network hardware architectures have been proposed for integrated EPON/WiMAX...
Packet schedulers are the key to guarantee quality of service in computer networks. The rate-controlled EDF schedulers embrace the good characteristics of output smoothness. But the methods used in the existing EDF schedulers to calculate eligible time are based on a real or virtual global system time, which is too complex to be implemented in high-speed networks. The paper presents a specific and...
Internet Service providers offer today a variety of of audio, video and data services. Traditional approaches for quality assessment of video services were based on Quality of Service (QoS) measurement. These measurements are considered as performance measurement at the network level. However, in order to make accurate quality assessment, the video must be assessed subjectively by the user. However,...
In this paper, we proposed a three-tier platform for providing group streaming service over mobile network environments with Fixed Mobile Convergence (FMC) techniques. The upper layer server takes responsibility of Quality of Service (QoS) computing and scheduling for serving heterogeneously grouped streaming requests. The middle layer servers take care of streaming packets' collection, packetization,...
Envisioning to meet the expectations arising from the Future Internet, and specifically to provide efficient Quality of Service (QoS) support for multimedia multi-user sessions, the attempts by the research community have resulted in mechanisms such as Multi-User Aggregated Resource Allocation (MARA). The MARA mechanism adopts an over-provisioning centric strategy to control surplus class-based bandwidth...
In Wireless Wide Area Network (WWAN), QoS are important, especially in Multimedia applications like Skype calls. The Internet is today facing a change of the traffic type dominating the aggregates at network core and edges. Interactive VoIP and videoconferencing are currently having an exponential growth of usage. To dynamically determine the appropriate streaming bit rate and quality, the server...
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