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The latest experiences hint that the QoS (Quality of Service) approaches adopted by IMS (IP Multimedia Subsystem) technologies are still suffering from a primary containment factor due to the nondifferentiation between IPTV (Internet Protocol Television) video components. The success of IPTV services depends on how the customer perceives QoS related to the provided stream. The satisfaction of this...
Quality of Service (QoS) in data networks refers to control mechanisms for reservation of network resources and traffic prioritization for specific network applications and types of data flows. Every network application can have their own demands for specific QoS parameters, such as bandwidth, delay, jitter or packet loss. Rapid grow of Internet has initiated the development of the Internet protocol...
The Software Defined Networking (SDN) paradigm separates the control plane from the packet forwarding plane, and provides applications with a centralized view of the distributed network state. Thanks to the flexibility and efficiency of the traffic flow management, SDN based traffic engineering increases network utilization and improves Quality of Service (QoS). In this paper, an SDN based traffic...
This paper offers a comparative analysis of quality of service (QoS) of the queuing disciplines Priority Queuing (PQ), Custom Queuing (CQ), Weighted Fair Queuing (WFQ), Class-Based Weighted Fair Queuing (CBWFQ) and Low-Latency Queuing (LLQ), with self-similar and long-range dependent traffic, through experimental measurements with routers. We take into account two different classes of traffic: real-time...
Qos of broadband network is important. ISPs have some methods for evaluate it. But they are not efficient enough. This paper present a new method in which delay and scale of windows of TCP messages are used for evaluating performance of broadband. Comparison between delay or scale of window s of samples is the core idea of the method. There are two kinds of comparison. One is absolute terms of above-mentioned...
Congestion in today's mobile networks is mainly managed by end to end congestion control algorithms such as TCP. However, in spite of its many merits, TCP does not cope well with the high variability inherent to radio links and customer experience may sometimes be poor as TCP reveals unable to rapidly grasp such a fluctuating bandwidth. To remedy this problem, we introduce in this paper a new proposal...
Given the growing demands for network services based sometimes on reduced resources, efficient solutions are continuously developed in order to operate the network infrastructures in optimum conditions. From network management viewpoint, the main challenge is related to traffic management solutions using data flow limitations for some specific users while giving higher priorities to others. If for...
In the current Internet system, there are many problems using anonymity of the network communication such as personal information leaks and crimes using the Internet system. As the study for solving this problem, there is the study of Policy Based Network Management (PBNM). This is the scheme for managing a whole Local Area Network (LAN) through communication control for every user. As one scheme...
With the increasing usage of cloud computing and dependence on a diverse set of distributed applications, users are reliant on consistent outcomes from a shared infrastructure. This drives the need for improved QoS guarantees for heterogeneous communication requirements over shared networks. The Recursive Inter-Network Architecture (RINA) is a fundamental programmable network architecture that provides...
The IP Multimedia Subsystem (IMS) is a standard network technology merging voice, data, and multimedia services. IMS is well integrated with existing voice and data in wire and wireless networks. To ease the integration with the Telecom and Internet networks, IMS use SIP (Session Initiation Protocol). The main components of IMS are CSCF's and HSS servers. They are responsible of processing and routing...
The video, voice, multimedia next-generation applications are using real-time data transmissions. Therefore, taking into account that all these applications are transmitted “over IP”, variable bandwidth has to be provided for specific situations in order to prevent network congestion. The active equipments meet these requirements and provide the network management. However, how will it be if the network...
This paper describes an architecture for global queue management (GQM). Global refers to the set of all queues in routers present in some network flow path. The main idea of the architecture is the detection of some anomaly somewhere downstream and the propagation of the local decision to a set of upstream routers or switches. The upstream devices are free to act as they wish. GQM is useful to boost...
A method to automatically configure the limitation mechanism in Flow-Aware Networks is presented in this paper. First, the concept of Flow-Aware Networking with special focus on the limitation mechanism is outlined. The automatic limitation mechanism i.e., a mechanism which automatically selects the most suitable flow admission limit during a measurement cycle is proposed, presented and analyzed....
In order to solve the problem of on-board optical burst switching assembly algorithm cannot realize completely QoS guarantee, an on-board optical burst switching weight-weighted round robin assembly algorithm based on the QoS guarantee(QWRRA) is proposed in this paper. In this assembly algorithm, IP packet will be inserted in different queue according to the different destination and QoS level when...
With the evolution of software-defined networking (SDN) paradigm, traffic management in data center networks has become flexible and scalable. The existing solution using OpenFlow, the rate-guaranteeing mechanism, is inefficient as it limits the rate of the flows by dropping batches of packets to achieve the desired throughput. In this paper, we propose BASIS, a solution based on Bayesian inference...
The performance of the Internet is dominated by that of the TCP which in turn depends that of its congestion control algorithm. The primary purpose of the TCP is to take care of the congestion collapse of Internet and also to act as resource optimization mechanism in best effort environment. However, this makes TCP to be unfriendly with real time applications for which UDP is preferred. There is no...
The IP Multimedia Subsystem (IMS) enables the convergence of voice, data, and multimedia services. IMS is well integrated with existing voice and data networks, while adopting many of their key characteristics. SIP (Session Initiation Protocol) provides a pathway to build a single unified network, bridging the gap that previously existed between the once-separated Telecom and Internet networks. The...
Nowadays, world is on going to “Convergence Era”, where data, voice, and video overcome to pass through same network, like IP network. Unfortunately, the fast growth of application technology has not been supported yet by default IP network in the case of quality of service. We have known, that voice over IP services have sensitivity to delay, jitter and latency. And it require of different bandwidth...
Mobile operators are today facing the daunting challenge of providing cheap and valuable services to ever more demanding customers. As a matter of fact, mobile standards have not yet really addressed this expectation of open, cheap and flexible web oriented internet access. As an alternative, we introduced an IP-centric QoS model mainly inspired by IP policies commonly found in fixed networks. In...
For the purposes of efficient network resource management and QoS (Quality of Service) support of different video services, this paper proposes a fine grained classification scheme for Internet video traffics based on hierarchical clustering. We study a number of QoS and network resource requirements related statistical features of some typical video applications and validate their effectiveness in...
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