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In this article, we analyze the performance evaluation of WiFi technology in conformance with IEEE 802.11b/n/ac standards and Wireless Distribution System (WDS) for indoor environments with and without obstacles. We present different scenarios by varying the distance between transmitter and receiver. We analyzed the performance of the network by using the intrusive technique of traffic injection with...
Broadband signal transmission through communication channels in home environments is one of the interesting topics in the field of intelligent buildings. Building designers are interested in transferring multimedia content with minimum cost, energy consumption, and acceptable quality. Limitations and drawbacks of existing transmission systems such as coaxial cable, wireless transmission, etc., have...
In Recent times, real time applications are increasing gradually which have specific Quality of Service (QoS) requirements. IEEE 802.11e is aimed to provide such QoS. 802.11e uses traffics differentiation among flows using a parameter set. The flows are admitted using their priority. The voice and video flows are admitted in most of the times due to their higher priority. This causes the increase...
Broadband Internet user base is growing at an exponential pace in India. The market pressures are forcing the Internet service providers (ISPs) to sell their service offerings aggressively, resulting in a growing discrepancy between consumer expectations and service offerings from the ISPs. This discrepancy is often evident in experienced vs offered Internet connection service. We study the Quality...
Usage of wireless networks is rising in popularity. In this setting different kinds of networks for indoor environments, such as Ad-Hoc, IEEE 802.11b (Wi-Fi) and Wireless Distribution System (WDS) has been developed. In this paper, an analysis of Quality of Service (QoS) has been made for each network in order to verify the values of bit rate, delay, jitter and packet loss. For performance comparison...
Non-elastic traffics are typically sensitive to assigned bandwidth and transmission delays which need quality-of-service (QoS) support to satisfy their different bandwidth requirements. QoS-based bandwidth allocation can be easily realized in a centralized manner for networks with central controllers. Since the centralized manner needs a central node to assign bandwidth, it is not suitable for distributed...
The one of challenges in VoIP networks development is how to manage network traffics. The reason for the challenge is VoIP traffics have to use internet networks to bring their messages. Meanwhile, internet is convergent networks which are very busy, because many applications use the internet. The implementation of queuing mechanisms which can distinguish network traffics is the one of mechanisms...
The performance management is specified Quality of services (QoS) parameters is throughput, jitter, packet loss and delay. Network performance (NP) is very challenging to predict and guarantee in QoS performance because many service and applications rapidly increased. From that, Broadband wired assessment was conducted among 5 regions in Malaysia with 25 locations. Assessment is to benchmarking network...
WiMAX refers to Wireless Interoperable implementations of the IEEE 802.16 standards ratified by the WiMAX Forum has a main goal to deliver wireless communications with quality of service in a secured environment. The WiMAX MAC layer is designed to support different types of applications and services having different Quality of service (QoS) requirements. In addition of providing higher throughput...
Wimax is an broadband wireless technology based on IEEE 802.16. It is very helpful and cheaper than other possible solutions. It is purely based on the 4G technology for the upcoming generation. In wireless technology the major problem is speed, Quality of Service, data rates in order to overcome that they going for some valuable technology. In this paper we consider WIMAX and WLAN for controlling...
Enhancing network performance has been studied by a number of researchers. The need to provide greater throughput on network infrastructure has been the key driver for these studies. The use of jumbo frames is considered one of the methodologies that can be employed to increase data throughput on networks. It can carry data payloads ranging from 1500Bytes to 9000Bytes which can be supported by Gigabit...
Multimedia services are typically much more sensitive to throughput, delay, and packet loss than traditional services. These parameters do not reveal the quality of service (QoS) perceived by users. This paper designs and implements a Quality of Experience (QoE) measurement framework to capture users' perceptions. The concept of framework is first to create a sample database in the analysis center,...
Quality of service (QoS) in wireless mesh networks is an active area of research which is driven by the increasing demand for multimedia content delivered wirelessly. The IEEE 802.16 (WiMAX) standard identifies four classes of service targeting throughput, delay, and jitter. In this paper, we achieve two main objectives. (1) We present a routing metric sensitive to both interference and throughput...
A good scheduling algorithm in wireless networks is the key for the efficient use of wireless medium. This paper presents a hybrid scheduling algorithm, called Contention-Vector based Hybrid Scheduling (CVHS) algorithm, for wireless networks wherein stations can sense each other. Examples of such wireless networks include wireless LANs and small wireless ad hoc networks. CVHS offers collision-free...
In WiMAX architecture to avoid congestion at the base station, a mechanism namely WiMAX Fair Intelligent Congestion Control (WFICC) was proposed in [11]. WFICC ensures that the traffic is scheduled in such a way that the base station output buffer operates around a target operating point, without violating the Quality of Service (QoS) requirements of connections. However, only preliminary results...
Even though different wireless Network Access Technologies (NAT) with different specifications and applications have been developed, no single wireless technology can satisfy the anytime, anywhere, and any service wireless access needs of mobile users. A real seamless mobile environment is only realized by considering vertical and horizontal handoffs together. One of the major design issues in heterogeneous...
Enhanced Distributed Channel Access (EDCA) is a mandatory part of the IEEE 802.11e standard which provides Medium Access Control (MAC) layer solution for Quality of Service (QoS) provisioning in Wireless Local Area Networks (WLANs). It is a contention based protocol which prioritizes channel access to QoS traffic using four Access Categories (ACs). In this paper, we introduce the performance evaluation...
Many global distributed cloud computing applications and services running over the Internet, between globally dispersed clients and servers, will require certain levels of Quality of Service (QoS) in order to deliver and give a sufficiently smooth user experience. This would be essential for real-time streaming multimedia applications like online gaming and watching movies on a pay as you use basis...
This paper addresses the problem of service specification and mapping across providers, supposing centralized approach, via the third party agent that manages negotiation process in a group of domains. A general structure of the service specification form is suggested. It contains technical parameters related with a particular service request. Based on such general form, we further propose, implement...
In this paper, we propose a consistent random backoff (CRB) scheme to reduce the channel access delay jitter in voice over wireless local area networks (VoWLANs). In the CRB scheme, a contention window (CW) size at each backoff stage is determined by hashing the session identifier and the talk spurt index. Therefore, all packets in the same talk spurt of a session have the same CW sizes if they are...
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