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The WiMAX network in the city of Baghdad is established by “The State Company for Internet Services” (SCIS). SCIS is a subsidiary of the Ministry of Communications (MoC) in Iraq. SCIS is responsible for the installation and operation of WiMAX networks and is also the prime “Wireless Internet service provider” (WISP) in Iraq. This paper presents a simulation model of a WiMAX network for the city of...
Voice transmission over the internet is the fundamental requirement of every organization. As a result various technologies have been introduced for the reliable transmission of voice over internet. Voice over Internet Protocol (VoIP) has emerged as a need for improvement of quality for a voice call. In this paper real time implementations have been performed for the VOIP over MPLS (Multi-Protocol...
This paper presents information about multi-access network and comparing a few technologies to provide the best quality of service. The paper provides a description of the basis for modeling a multi-access network. The models involved in the article take into condition an ability of setting priorities to a number of elected traffic classes. Solving the problem of prioritizing network traffic can increase...
In this paper we introduce and asses the performance of a new scheduling algorithm based on Earliest Due Date (EDD) mechanism. Our proposed scheduling algorithm enhances the performance of Real-Time (RT) flows such as video and Voice Over Internet Protocol (VOIP) in Long Term Evolution (LTE) cellular networks especially in downlink. The proposed scheduling scheme provides the lowest Packet Loss Ratio...
Femtocells have gained a lot of attention recently due to their advantages in terms of infrastructure cost saving and improved use rexperience in indoor environments. Several standards bodies, such as 3GPP, worldwide interpretability for microwave access (WiMAX) Forum, and IEEE802.16, have started to develop standard solutions to enable and optimize Femtocells operation. In this paper, a multi-level...
Today, One of the most important performance measures in the new burst traffic gets to 3G and 4G systems is the End-to-End jitter. However, in order to study and analyze Jitter, many works and models have been devoted to estimate and evaluate this parameter. In this paper, analytical formulas for jitter of interrupted Poisson traffic (IPP) and MMPP-2 are presented. We provide Jitter approximation...
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...
All-IP network in Indonesia are still few in number. It is estimated that more than 5 years from now there are a combination of non-IP networks and all-IP network. At this time, an international VoIP service in Indonesia is given by the regulated and unregulated providers. The regulation of VoIP services are included in government regulation number KM.23.2002 about internet telephony for public use...
Based on the ongoing development in the Long Term Evolution (LTE), it was brought in to satisfy user's needs and demands on the enhancement of the wireless network's Quality of Service, especially for real-time applications. Real-time applications require low delay; in order to have a better user's experience. Hence, a scheduling framework focuses on real-time applications has been proposed and developed...
LTE is one of the leading technologies to meet the requirements of 4G telecommunication systems. Important design parameters intended to achieve this goal include high data rate, low latency and efficient network bandwidth requirements. Scheduling in LTE is one of the most important functions of the eNodeB due to the existence of different subcarriers in OFDMA modulation and the frequency diversity...
In the event of the growing demands, Long-Term Evolution (LTE) was introduced to satisfy user's needs. User's demands are for improvement in the throughput as well as the Quality of Service (QoS) in the wireless network. Hence, through this research, tests on several uplink scheduling methods are carried out, and the data produced from the tests are collected and analyzed. Simulation results showed...
The Internet has now become such an important infrastructure that is capable of sending information within a very short time and easy to access. It is considered as public networks that provide affordable WAN services to most customers. Applications such as video conferencing, file transfer protocol and VoIP are the example of typical network applications supported by the Internet Protocol. Various...
Voice over Internet Protocol (VOIP) is a technology that transports voice data packets across packet-switched networks using the Internet Protocol (IP). Losing packets in the network is inevitable, and losing voice packets degrades audio quality. The Sender-Based loss-recovery techniques can be used to mitigate the undesired effects of packet loss in VOIP system. In this Paper we introduce a newly...
One of the most common ways, where anyone can communicate with each other very easily, and instantly, is, of course, the voice exchange. Public Switched Telephone Networks (PSTN), and Voice over Internet Protocol (VoIP) are common ways of transferring voice communications by using telephone network. These two ways have their own strengths and weaknesses. The two major positive points of the PSTN are...
One of the most interesting applications of single — sided Quality of Experience (QoE) metrics is their use in improving the quality of the service, as perceived by the user. This can be done either at the application level — by for example changing the encoding in use, or the level of error correction applied — or at the network level, for instance by choosing a different DiffServ marking strategy,...
Nowadays the use of Internet protocol (IP) has transformed the delivery of content and services over networks. The perspective of low costs communications determined a very fast development of Voice over Internet Protocol (VoIP) technologies. Along with voice, VoIP communications channels can transport video streams also. This type of VoIP communications, also known as videoconferencing, demands a...
Integration of different network services into a converged infrastructure is one of the most intensive challenges in the converged network application development area. Huge differences exist regarding several characteristics of data, voice and video content traffics. While data traffic requires error free services, real time applications like interactive video transfer and VoIP distress of the high...
The next generation technology of Voice over Internet Protocol (VoIP) allows voice to be delivered over the Internet Protocol based networks. The integration of VoIP and Wireless Local Area Network (WLAN) has become popular. However, WLAN architecture was primarily designed to carry data and not for real-time applications, such as VoIP. Hence, there is a need to enhance the quality of VoIP transmission...
In this paper we are given concept of our WiMAX (Worldwide Interoperability for Microwave Access) network performance for QoS monitoring and optimization solution for BS (Base Station) with multimedia application. In the communication sector, the optimal objective is to equate quality and cost. Due to its large coverage area, low cost of deployment and high speed data rates. WiMAX is a promising technology...
This paper proposes a solution for throughput and stringent delay problems of VoIP in Ad-Hoc mode of IEEE 802.11 WLAN standards. This paper analyses the behaviour different codecs and schemes of WLAN running on VoIP traffic and draws a conclusion on the performance of network based on the criteria of different QOS parameters. Later the suitability of different routing protocols like AODV, DSR, OLSR...
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