QoS

The Internet is growing to the point of needing more serious, scalable management infrastructure. Telecommunications companies and Internet Service Providers alike face the pressures of upgrading and provisioning their networks while constraining their infrastructure costs to maintain profitability and to stay competitive in an industry that is financially stressed with tight profit margins. In order to be financially successful in this environment, service providers will have to support a variety of services and applications on a combined packet infrastructure, carrying increased varieties of traffic with different performance characteristics and predictable levels of managed Quality of Service (QoS). Multi-Protocol Label Switching (MPLS) traffic engineering enables service providers to engineer their networks to provide such QoS; however, this task brings along with it a plethora of management challenges. This paper discusses these management challenges and our experience with the design and implementation of a policy-based management system, PECAN, for managing MPLS networks. PECAN provides the ability for a network operator to define high-level policies that control the operation of the management system. These high-level policies control admission of traffic into the network based on the QoS guarantees required; placement of traffic flows on MPLS traffic engineered paths; and the feedback loop between network fault/performance monitoring and reconfiguration of the network to alleviate the effects of any observed problems.

In this paper faults are processed and models of faults in telecommunications networks are proposed in relation to services and revenues. The probability of faults occurring is estimated. Cost models are presented predicting the amount of revenue loss. We relate faults to services with detailed relationship between them being shown.

In this paper, we propose an orthogonal frequency division multiplexing (OFDM) based underwater acoustic multimedia system. An essential feature of this system is that it offers larger power and schemes providing significant error protection for the transmission sensor data information that requires higher quality of service (QoS). To realize maximum resource utilization, or minimum total transmission power, we also include an adaptive modulation strategy into the system. Thus, in the proposed underwater acoustic multimedia system, high power, low speed modulation, and scheme providing significant error protection schemes are employed for the transmission of sensor data messages that require a stringent bit-error rate (BER). In contrast, low power, high speed modulation, and less capable error protection schemes are provided for messages that can tolerate a high BER. A simulation is carried out to verify the proper functioning of the proposed system in a practical underwater acoustic multimedia scenario.

This paper describes a new architecture which addresses Quality of Service (QoS) by creating unique flows for applications, services, or subnets. A flow is a dedicated and independent path from the NIC hardware to the socket layer in which the QoS layer is integrated into the protocol stack instead of being implemented as a separate layer. Each flow has dedicated hardware and software resources allowing applications to meet their specified quality of service within the host.

In multi-tenant cloud systems today, provisioning of resources for new tenancy is based on selection from a catalogue published by the cloud provider. The published images are generally a stack of appliances with Infrastructure (IaaS) and Platform (PaaS) layers and optionally Application layers (SaaS). Such a ready-made model enables quicker and streamlined resource provisioning to clients. However, this approach poses certain challenges to clients in the short run and providers in the long run. Unique tenancy requirements from each client are forcibly generalized by selecting one of the available images from the catalogue as the tenancy requirements are not modeled or validated to start with. Moreover, resource provisioning is mostly done towards addressing the peak load expectations in the tenancy. Such a static approach does not help in adapting to dynamically changing tenancy requirements, most often leading to the tenants owning and subsequently paying for more than what they n...

A main challenge for service providers is managing service-level agreements (SLAs) with their customers while satisfying their business objectives, such as maximizing profits. Most current systems fail to consider business objectives and thus to provide a complete SLA management solution. This work proposes an SLA-driven management solution that aims to maximize the provider's profit by reducing resource costs as well as fines owning to SLA violations. Specifically, this work proposes a framework that comprises multiple, configurable control loops and supports automatically adjusting service configurations and resource usage in order to maintain SLAs in the most costeffective way. The framework targets services implemented on top of large-scale distributed infrastructures, such as clouds. Experimental results demonstrate its effectiveness in maintaining SLAs while reducing provider costs.

This work addresses analytically the impact of multi-cell, multi-operator interference on the overall radio resources when multiple operators co-exist and share a common pool of spectrum. We propose a centralised dynamic spectrum allocation (DSA) scheme that is able to measure the interference level and interact dynamically to minimise interference and enhance spectrum utilisation while maintaining a satisfactory level of QoS. Furthermore, a concise system model and framework able to describe the interaction among different operators is presented.

The streaming of multimedia contents (e.g., Mobile TV) is a bandwidth intensive service. The network operator's aim is to provide an acceptable user experience at minimal network resource usage. It is important from the network operator's perspective to be aware of: 1) the thresholds at which the user's perception of service quality becomes unacceptable; and 2) the degree of influence of each of the Quality of Service (QoS) parameters on the user perception. However, very little is known about the formal methods to optimize the use of QoS mechanisms in relation to the user's Quality of Experience (QoE). In this paper, we explain how the user's QoE can be captured. A statistical modelling technique is employed which, correlates QoS parameters with estimates of QoE perceptions and identifies the degree of influence of each QoS parameters on the user perception. The network operator can apply this information to efficiently, and accurately undertake network dimensioning and service provisioning strategies. This proposed methodology is applied to demonstrate QoE management strategies, thus paving the way towards QoE-aware QoS management.

The fundamental characteristic which differentiates MANETs from other wireless or wired networks is mobility. Therefore, MANET routing protocols are designed to adaptively cater for dynamic changes in topology while maximizing throughput and packet delivery ratio, and minimizing delay, routing load and energy consumption. A major design issue for an efficient and effective routing protocol for real MANETs is, therefore, to achieve optimum values of performance parameters under network scenarios where nodes are subjected to different types of mobility that dynamically change the network topology. Our simulative study on MANET routing protocols and mobility models aims to determine the performance of current MANET routing protocols with respect to various mobility models implemented in ns-2. We compare a number of reactive and proactive routing protocols including AODV, DSR, DSDV, OLSR and DYMO. The results of our extensive network simulations are tabulated along with a comprehensive analysis. The effort allows a fair comparison of the capabilities and limitations of different types of mobility patterns and their suitability for contemporary MANET routing protocols.

Current information and communication services are growing rapidly in directions very different from those pursued in the past. The strong drive for these services' fast development and deployment has not been accompanied by a proper understanding of their engineering and design principles, and for the most part, the services' satisfactory qualitative performance is being obtained by the strength approach of over-provisioning. Thus, there is a strong need for a deeper quantitative understanding of the services' functioning, an understanding that leads to clear design and control methods that it turn make the services' efficient deployment and exploitation possible. The research performed within this paper covers analytical and design aspects of technical and economical challenges emerging in multiservice networks and was conducted from a methodological perspective of evolving network infrastructure. The paper focuses on challenging issues in the planning and design of enterprise communication infrastructure and also determines strategies for the successful implementation converged networks.

Seamless handover between different access technologies is a great challenge as it needs to obey different performance of QoS and security constraints. Subscribers are becoming more demanding regarding roaming capabilities across different networking technologies such as WiFi, WiMAX, and CDMA as they claim service continuity with QoS requirement and good security features. In this paper, a QoS based vertical handover mechanism between WiMAX and WiFi networks is proposed by applying the Signal to Interference and Noise Ratio SINR. The Media Independent Handover MIH (IEEE 802.21) protocol is adopted to assist in the handover decisions by providing a suitable platform for vertical handovers. The performance of the proposed SINR based vertical handover algorithm and RSS based vertical handover algorithm have been evaluated in terms of the maximum downlink throughputs.

Cloud can be defined as a new computing paradigm
that provides scalable, on-demand, and virtualized resources for
users. In this style of computing, users can access a shared
pool of computing resources which are provisioned with minimal
management efforts of users. Yet there are some obstacles and
concerns about the use of clouds. Guaranteeing quality of service
(QoS) by service providers can be regarded as one of the main
concerns for companies tending to use it. Service provisioning
in clouds is based on service level agreements representing a
contract negotiated between users and providers. According to
this contract, if a provider cannot satisfy its agreed application
requirements, it should pay penalties as compensation. In this
paper, we intend to carry out a comprehensive survey on the
models proposed in literature with respect to the implementation
principles to address the QoS guarantee issue.

This paper treats a MPLS VPN implementation in a network, which was initially configured for fulfilling the demands for mainly voice and ADSL services. At the beginning, the architecture of TK (Telecom of Kosova) NGN network with its corresponding elements and functionality is described. Then, based on business customers' demands, the reconfiguration of MPLS VPN in a full mesh LSP form is presented. The standardized methodology used for creation of new services was of great support for fast provision of those services. This experience has demonstrated all the advantages of a network based MPLS VPN approach in a full mesh LSP network. At the end, the example of the full mesh LSP network topology configuration is presented. Currently, the established network is used to offer VPN services to a bank located in 4 different towns in Kosova, and later for the other customers with the similar demands.

The widespread Internet of Things (IoT) utilization in almost every scope of our life made it possible to automate daily life tasks with no human intervention. This promising technology has immense potential for making life much easier and open new opportunities for newly developed applications to emerge. However, meeting the diverse Quality of Service (QoS) demands of different applications remains a formidable topic due to diverse traffic patterns, unpredictable network traffic, and resource-limited nature of IoT devices. In this context, application-tailored QoS provisioning mechanisms have been the primary focus of academic research. This paper presents a literature review on QoS techniques developed in academia for IoT applications and investigates current research trends. Background knowledge on IoT, QoS metrics, and critical enabling technologies will be given beforehand, delving into the literature review. According to the comparison presented in this work, the commonly considered QoS metrics are Latency, Reliability, Throughput, and Network Usage. The reviewed studies considered the metrics that fit their provisioning solutions.

In this paper, we present a generic framework for performance evaluation of video streams. We embrace the perspective of a streaming application, and model the playback buffer level at given network and playback conditions. That way, our model enables flexible, adaptable evaluation of a wide variety of streaming methods and protocols. We test our model on HTML5 and Flash video as served by the YouTube web site. We find universal achievable limits in any streaming process, and explore quality trade-offs every application has to decide on.

Interest in broadband wireless access (BWA) has been growing due to increased user mobility and the need for data access at all times. IEEE 802.16e based WiMAX networks promise the best available quality of experience for mobile data service users. Unlike wireless LANs, WiMAX networks incorporate several quality of service (QoS) mechanisms at the Media Access Control (MAC) level for guaranteed services for data, voice and video. The problem of assuring QoS is basically that of how to allocate available resources among users in order to meet the QoS criteria such as delay, delay jitter and throughput requirements. IEEE standard does not include a standard scheduling mechanism and leaves it for implementer differentiation. Scheduling is, therefore, of special interest to all WiMAX equipment makers and service providers. This paper discusses the key issues and design factors to be considered for scheduler designers. In addition, we present an extensive survey of recent scheduling research. We classify the proposed mechanisms based on the use of channel conditions. The goals of scheduling are to achieve the optimal usage of resources, to assure the QoS guarantees, to maximize goodput and to minimize power consumption while ensuring feasible algorithm complexity and system scalability.

Long lasting Ethernet standards have grown beyond traditional LAN networks through MAN to WAN environment, where it has become the technology which many providers use for developing convergent networks that transport new generation services, such as triple-play widely deployed everywhere – from airports and hotels to large cruise ships. The question of network suitability for providing various communication services has to be considered in practice, especially in case of large ships, as the content of traffic is very diverse with exceptionally variable intensity. Under such specific circumstances for ships theoretical models cannot be directly applied. Rather, network design and implementation depend on practical preliminary test results and analysis. To this end, the out-of-service simulation of either network or user equipment was done according to the RFC 2544 recommendation by means of a smart test device that generates the appropriate test traffic over the Ethernet link from a ...

The internet has been undergoing rapid and continuous growth over the past few years. The most significant development the telecommunication industry has witnessed is the evolution of Voice over IP technology. This technology uses the internet as a medium for transmitting voice during a telephone conversation between two or more parties. VoIP technology comes with numerous benefits like reduced call cost and wide variety of add-ons to both the service providers and the end users. Despite all these, the technology is subjected to security risk because of the open nature of the internet. Much emphasis has been placed on the quality of service of VoIP over the years and dark eyes have been turned on its security. This study therefore aims to identify the security threats and attack VoIP can be exposed to during transmission, produce a VoIP system using the open source Asterisks before securing the network using IPSec VPN

Wireless Sensor Networks (WSNs) are composed selforganized wireless ad hoc networks which comprise of a large number of resource constrained sensor nodes. The major areas of research in WSN is going on hardware, and operating system of WSN, deployment, architecture, localization, synchronization, programming models, data aggregation and dissemination, database querying, architecture, middleware, quality of service and security. This paper study highlights ongoing research activities and issues that affect the design and performance of Wireless Sensor Network.

Nowadays cellular technology is going to be emerged rapidly. Based on the demand of the users, next generation cellular system is being able to provide a variety of applications for users' satisfaction. The Universal Mobile Telecommunication (UMTS) System is one of the features of cellular communication that is able to yield the different types of services as per users' satisfaction. Video and voice conferencing have a great deal of demand over the cellular network. The quality of service (QoS) is the major concern for real time application in this area. For suitable service to fulfill the users' demand, it is necessary to improve the QoS. Next generation/4G network will be intelligent and common platform to integrate all other wireless technologies. To attain better performance for voice and video conferencing in the heterogeneous network, proper adaption of QoS is required. In this paper, we consider the 3G/UMTS network to implement the QoS and analyze the results. The simulation result is evaluated based on some parameters such as Packet Loss, End to End Delay, Packet Delay Variation, Throughput and Jitter. Investigation of the simulation result shows that the proper adaption of QoS provides the better performance regarding these parameters. In order to improve the performance of existing parameters in UMTS network, we analyze the simulation results. Finally on the basis of results in UMTS/3G network; we study the QoS performance for B3G/4G wireless network and propose integration scheme to develop the QoS performance based on existing QoS parameters for heterogeneous network in 4G.

In this article, we propose new methods to reduce the handoff blocking probability in the 3rd Generation Partnership Project Long Term Evolution wireless networks. This reduction is based on an adaptive call admission control scheme that provides QoS guarantees and gives the priority of handoff call over new call in admission. The performance results of the proposed schemes are compared with other competing methods using simulation analysis. Simulation results show the major impact on the performance of the 3rd Generation Partnership Project Long Term Evolution network, which is reflected in increased resource utilization ratio to (99%) and in the ability in satisfying the requirements of QoS in terms of call blocking probability (less than 0.0628 for Voice over IP service) and dropping probability rate (less than 0.0558).

Cloud Computing provides a convenient means of remote on-demand and pay-per-use access to computing resources. However, its ad hoc management of quality-of-service and SLA poses significant challenges to the performance, dependability and costs of online cloud services. The paper precisely addresses this issue and makes a threefold contribution. First, it introduces a new cloud model, the SLAaaS (SLA aware Service) model. SLAaaS enables a systematic integration of QoS levels and SLA into the cloud. It is orthogonal to other cloud models such as SaaS or PaaS, and may apply to any of them. Second, the paper introduces CSLA, a novel language to describe QoS-oriented SLA associated with cloud services. Third, the paper presents a control-theoretic approach to provide performance, dependability and cost guarantees for online cloud services, with time-varying workloads. The proposed approach is validated through case studies and extensive experiments with online services hosted in clouds such as Amazon EC2. The case studies illustrate SLA guarantees for various services such as a MapReduce service, a cluster-based multi-tier e-commerce service, and a low-level locking service.

Ce papier présente l'analyse et la conception d'un système de communication sans fil basé sur la technologie Bluetooth destinée à la commande à distance de manipulateurs mobiles. Une présentation de la technologie Bluetooth et de ses mécanismes de transmission sont présents ainsi qu'une caractérisation du domaine de fonctionnement de la commande à distance d'un manipulateur mobile en présence de retards. ABSTRACT. This paper proposes a solution to control some remote mobile manipulators using Bluetooth technology. Some Bluetooth specifications and performances are presented as well as experimental results. A remote mobile manipulator control case is theoretically studied including the stability analysis with time delay. Some simulations results prove the robustness of this control law versus time delay. MOTS-CLÉS : Bluetooth, commande robuste, temps réel, sans fil, QdS.

Long-Term Evolution (LTE), an emerging and promising fourth generation mobile technology, is expected to offer ubiquitous broadband access to the mobile subscribers. In this paper, the performance of Frame Level Scheduler (FLS), Exponential (EXP) rule, Logarithmic (LOG) rule and Maximum-Largest Weighted Delay First (M-LWDF) packet scheduling algorithms has been studied in the downlink 3GPP LTE cellular network. To this aim, a single cell with interference scenario has been considered. The performance evaluation is made by varying the number of UEs ranging from 10 to 50 (Case 1) and user speed in the range of [3, 120] km/h (Case 2). Results show that while the number of UEs and user speed increases, the performance of the considered scheduling schemes degrades and in both case FLS outperforms other three schemes in terms of several performance indexes such as average throughput, packet loss ratio (PLR), packet delay and fairness index.

In gigabit passive optical networks (GPONs), the ports of the optical line terminal (OLT) support passive optical networks (PONs). An optical split ratio supported on an OLT chassis determines the number of optical network units (ONUs) which can share PON link capacity. Generally, network planners tend to do dimensioning for PON link capacity (OLT port) based on the number of subscribers and their type (i.e. residential or business). Although this dimensioning approach is simple, it does not guarantee a selection of optical split ratio which can optimally allocate bandwidth to end-subscribers. In this paper, we develop an integrated mathematical framework for optimally dimensioning resources in an GPON access network, namely OLT capacity. This framework comprises three resource-dimensioning approaches which are based on user requirements: GPON link utilization and capacity optimization. Our mathematical framework has been integrated into software for GPON resource dimensioning, which we have developed to evaluate the support and performance of services in GPON access networks.

Dynamic Adaptive Streaming over HTTP (DASH) enhances the Quality of Experience (QoE) for users by automatically switching quality levels according to network conditions. Various adaptation schemes have been proposed to select the most suitable quality level during video playback. Adaptation schemes are currently based on the measured TCP throughput received by the video player. Although video buffer can mitigate throughput fluctuations, it does not take into account the effect of the transition of quality levels on the QoE. In this paper, we propose a QoE-aware DASH system (or QDASH) to improve the user-perceived quality of video watching. We integrate available bandwidth measurement into the video data probes with a measurement proxy architecture. We have found that our available bandwidth measurement method facilitates the selection of video quality levels. Moreover, we assess the QoE of the quality transitions by carrying out subjective experiments. Our results show that users prefer a gradual quality change between the best and worst quality levels, instead of an abrupt switching. Hence, we propose a QoE-aware quality adaptation algorithm for DASH based on our findings. Finally, we integrate both network measurement and the QoE-aware quality adaptation into a comprehensive DASH system.

Performance of wireless networks lies in the physical link and the most influential are the physical conditions such as distance, because the weaker the radio frequencies that can receive and make access to the network is slow, but the barrier of wall thickness (Fresnel Zone) and the adjacent signal interference (interference Co-Channel) of the other components could also lower the quality of the received signal enduser. Of problems occurred that may affect the overall performance of the network parameter AP is QoS (Quality of Service) such as delay, jitter, throughput, and packet loss. aims to determine the optimal wireless network performance to provide a good network quality of the physical aspects that guarantee a given QoS tailored to the applications used and the efficiency of the network Wireless LAN (Hotspot) at the University of Bina Darma for each enduser.

Existing multimedia software in e-learning do not provide par excellence multimedia data service to the common user; hence e-learning services are still short of intelligence and sophisticated end user tools for visualization and retrieval. Network QoS (Quality of Servcie) becomes critical with precision requiring low motion video streaming, over wireless scarce resource networks having fluctuating bandwidth, fading channels, multiple paths and requirement of minimal and optimal power usage. In this project, QoS for low motion video streaming with best perceptual quality is being guaranteed with novel techniques. We consider educational videos for our research. Our strategy is to segment video into different segments and code by our pooled compression scheme (CEZW+), and employ Forward Error Correction coded OFDM signals for transmission over MIMO (Multiple Input Multiple Output) wireless channels.

We guarantee transmission QoS for such compressed video streaming with maximum reliability and perceptual quality; selective video frames transmission for least data redundancy; high data rates with MIMO systems; optimal power allocation for transmission at different BW levels; and preferential allocation of fluctuating bandwidth according to relative importance of segmented video blocks. We exploit both Spatial Multiplexing and Alamouti Space Time Block Coding for transmission. Experimentation results demonstrate effectiveness of our proposed schemes. We exploit low motion video characteristics to achieve maximum compression and streaming throughput. The MIMO system is implemented on Xilinx Spartan FPGA (Field Programmable Gate Array). Parallel implementation of MIMO-OFDM internal configuration on FPGA through specifically designed process which uses System Generator tool guarantees optimal performance of testbed which is measured through parameters like prototype development time, synthesis error elimination, processing time for transmission bit generation and decoding, FPGA resource utilization and reliability over conventional algorithms for FPGA implementation like those employing VHDL, and Verilog. The results are compared with the state of the art transmission and hardware schemes over the network to illustrate the superior performance of our approach.

Scheduling flows in the Internet has sprouted much interest in the research community, leading to the development of many queueing models, capitalizing on the heavy-tail property of flow size distribution. Theoretical studies have shown that 'size-based' schedulers improve the delay of small flows without almost no performance degradation to large flows. On the practical side, the issues in taking such schedulers to implementation have hardly been studied. This work looks into practical aspects of making size-based scheduling feasible in future Internet. In this context, we propose a flow scheduler architecture comprising three modules -Size-based scheduling, Threshold-based sampling and Knockout buffer policy -for improving the performance of flows in the Internet. Unlike earlier works, we analyze the performance using five different performance metrics, and through extensive simulations show the goodness of this architecture.

IEEE 802.16 standard has been proposed to support wide-range wireless broadband access. It is based on a common medium access control (MAC) protocol compliance with several physical layer specifications and operates in two modes Point-to-multipoint (PMP) and mesh mode. Physical layer specifications and MAC protocol signaling are already well defined for the standard. But, scheduling policies for IEEE 802.16 have been left as open issue to be explored by equipment manufactures. The objective of this survey is to investigate scheduling issues to ensure quality of service (QoS) support for WiMAX networks. Design issues for the development of schedulers have been presented. Classification and characteristics of various techniques based on their fundamental working principle are considered and summarized. Impact-able future issues in the area of QoS support for WiMAX have also been discussed.

The IP Multimedia Subsystem (IMS) adopted in the core of Next Generation Networks (NGNs) promises to make network management easier by separating the control and the transport planes. Therefore, an interface between applications and the underlying transport network has been defined that offers a dynamic and efficient management of network resources based on a policy-based resource control engine. The resulting resource management framework enables the delivery of both the existing carrier grade existing and the next generation Quality of Service (QoS) sensitive services across operator-controlled networks using heterogeneous transport technologies. This review sheds some light into the policy control layer concept and the extended nomenclature introduced by current standardization works. The approaches of international standards development organizations, such as the Third Generation Partnership Project (3GPP), the International Telecommunication Union (ITU), the European Telecommunications Standards Institute (ETSI), the WiMAX Forum, and CableLabs are reviewed and compared with each other revealing the common architectural trend. Challenges and works in progress of NGN resource management towards Fixed and Mobile Convergence (FMC) are discussed as well.

Machine to machine (M2M) communication has received increasing attention in recent years. It exhibits features such as large number of devices and low data rates. In order to accommodate massive, energy efficient M2M traffic and to reduce the access delay and signalling overhead, the recommendation is to introduce a clustered network structure. In this effort, we consider machines (or devices) in a macro cell divided into clusters. The machines belonging to a cluster communicate to the cluster head/controller, which then aggregates the traffic and relays to the eNB. Unlike related work that focuses on formation of clusters and their energy consumption, in this paper we investigate the multi-objective optimization problem of throughput maximization and power control of cluster heads in interference-limited M2M communication. Our objective is to maximize the number of admitted MTC device controllers with least interference caused to conventional (human) devices such that their quality of service (QoS) is not affected by the M2M communications. To maximize the number of machines that can communicate while meeting the interference constraints of human devices and machines themselves, we formulate a mixed-integer non-linear programming (MINLP) problem. OPTI toolbox is used to optimize the power, capacity and maximum number of admitted machines collectively.

In this paper, a resource scheduling algorithm for Long Term Evolution (LTE) downlink is proposed. It provides Quality of Service (QoS) guarantee to Guaranteed Bit Rate (GBR) services and also suit to the Non Guaranteed Bit Rate (Non-GBR). Different services possess different QoS needs in LTE system, based on this, 3GPP divide them into several types. In view of the division, we set priorities for different kinds of services to guarantee the transportation of GBR services which have high QoS needs. At the same time, we take the Media Access Control (MAC) layer logical channel priority into account, and consider users' channel quality to acquire a higher cell throughput. Simulation results show that our scheme can improve the QoS of emergency services obviously at the cost of a certain amount of the non-real times'.

The utilization of communication model based on computer network technology is a technology that has been widely used. Communication model on computer network, using communication protocol which fits in with standard communication type that widely known as network protocol. The number of ports which identify network protocol according to IANA is numbering 65,536 ports. The utilization of network protocol in communication of computer network, is sometimes demanding communication priority which often known as QoS (Quality of Service). Referred communication priority is based on the number of communication model utilization which using network protocol as in HTTP protocol. The analysis of computer network traffic is one of the methods to find out the utilization of computer network communication protocol, so that can be a basis of priority setting (QoS). The utilization of Naïve Bayes is used to classify communication protocol in computer network. The utilization of wireshark application is used as network capture tool and the result achieved is classifying network protocol used as a setting reference of QoS.

Voice over Internet Protocol (VoIP) is one of the most important technologies in the world of communication. Around 20 years of research on VoIP, some Quality of Service (QoS) problems of VoIP are still remaining. During the past decade and with growing of wireless technologies, we have seen that many papers turn their concentration from Wired-LAN to Wireless-LAN. VoIP over Wireless LAN (WLAN) faces many challenges, due to the loose nature of wireless network. Issues like providing QoS at a good level, dedicating capacity for calls and having secure calls is more difficult rather than wired LAN. Therefore VoIP over WLAN (VoWLAN) remains a challenging research topic. Popularity of Voice over IP (VoIP) application such as Google Talk, Skype and MSN Messenger is making VoIP over WiMAX an eye-catching market and a driving force for both carriers and equipment suppliers. In this paper experimentally measured VoIP traffic and CBR traffic over the WiMAX network by using the different routing algorithm using QualNet 4.5.1 network simulation tool. In addition, this paper also shows that VoIP application can be best served with WiMAX rather than the CBR. Future work will involve simulating scenarios that are closer to the real world models.

Voice over internet protocol (VOIP) was been important technology for service providers because it has real time services. VOIP is a gigantism technology .its facility dispatch of voice data over Internet Protocol .This paper is study the performance of VoIP traffic over WiMAX networks. The vestige of various voice codec and statistical distribution for VoIP over WiMAX has been studied in detail [2] .there is a Parameters that beckon the Quality of Service such as throughput, delay, jitter and loss with obeisance to Silence Detection (SD) or Voice Activity Detection (VAD) in voice codec G.729.[2] The simulation result beckon that the pareto distribution in inter arrival time has a important vestige on the performance of VoIP in WiMAX network.[1]