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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...
In this paper, we address cloud VoIP scheduling strategies to provide appropriate levels of quality of service to users, and cost to VoIP service providers. This bi-objective focus is reasonable and representative for real installations and applications. We conduct comprehensive simulation on real data of twenty three on-line non-clairvoyant scheduling strategies with fixed threshold of utilization...
In this paper, we address cloud VoIP service orchestration and scheduling to provide appropriate levels of quality of service to users, and performance to VoIP service providers. We consider voice quality affected by call processing, and cost contributed by billing hours for used VMs in a cloud. We believe that this biobjective focus is reasonable and representative for real installations and applications...
Cognitive Radio Network (CRN) is one of the emerging technologies to improve the spectrum utilization where Secondary Users (SUs) opportunistically uses the spectrum without creating significant interference to Primary Users (PUs). However, in CRN channel characteristics varies widely due to the random arrival of PUs which leads to call dropping/call blocking. Excessive call dropping reduces the quality...
SpaceFibre is the upcoming European standard for on-board high-speed communications. The need for data-rate beyond 1 Gb/s is already present in space missions, and it is currently fulfilled by non-standard approaches based on Serialiser/Deserialiser components such as Texas Instruments TLK2711. The SpaceFibre standard also integrates Quality of Service and Fault Detection, Isolation and Recovery mechanisms,...
This paper explains the performance of voice over LTE system using different voice codec. LTE is the third generation partnership program 3GPP communication system which is wireless in nature and is also the first IP based system. VoLTE (Voice over LTE) is expected to be deployed in the near future for providing voice services. It's ability to reach high throughput is promising in both downlink and...
In this paper we propose a mechanism entitled Delay-Aware Packet Prioritisation (DAPP) that works at WiFi packet queue level. DAPP enqueues packets according to their time spent in the network, such that more delayed packets are enqueued towards the head of the queue. We study the effects of such an approach in wireless multi-hop scenarios where VoIP packets with various delay impairments reach a...
Achieving high-quality voice conference calls over the Internet is a difficult task. Heterogeneous mobile devices and network dynamics must be properly managed by multiparty VoIP systems to ensure a good quality of experience. In this paper, we propose a multiparty VoIP system based on SDN technology that uses both multicast distribution and dynamic stream adaptation to optimize the conference call...
The growing popularity of outsourced enterprise VoIP services poses a significant quality assurance issue for service providers. VoIP traffic is very sensitive to network impairments and maintaining high QoS across multiple domains can be challenging. We propose to use SDN and our implementation of intermediate VoIP call quality measurement to provide an advanced VoIP monitoring service. Our solution...
The introduction of new diagnosis treatment systems and devices in hospital environments presents an enormous challenge in terms of strategies and operational planning. These systems, which are generally interconnected, generate huge volumes of information of a heterogeneous nature that may be processed using resources that are external to the hospital. Correct design of hospital communications would...
Ensuring satisfactory Quality of Service (QoS) is a vital consideration in deploying multimedia streaming service, especially when deploying over wireless network. Selecting suitable parametric values for each streaming parameter is one of a crucial factor. This work is concerned with one of the parameters commonly known as ‘Packetization Interval’ which has direct influences on several critical QoS...
To attain the Voice over Internet Protocol (mVoIP) for mobile framework through adaptively in Software Defined Networking (SDN) in a more better and efficient manner. The key parameters or obstacles that come across in improving the Quality of Experience of mVoIP can be optimization of path of the data during forwarding for flows in VoIP and selection of optimized codes for the network congestion...
Performance evaluation of VoIP is done by considering the network parameters jitter, packet end to end delay, and packet delay variation. Integration of Quality of Service (QoS) with the Internet Protocol (IP) and Multiprotocol Label Switching (MPLS)networks should enhance the performance of the network. Various scheduling algorithms can be used for implementing QoS on a network. In this paper, the...
Managing VoIP service using QoS analysis is a vital issue for obtaining voice desired quality. Quality improvement and rational resource utilization are two parameters involved in determining VoIP service functionality. Which parameter outweighs the other one is a permanent challenge affecting developers' decisions. Hence every now and then different approaches are introduced impacting on VoIP service...
The rapid growth of wireless mobile communications raises the critical issue of meeting user expectations and requirements. This paper deals with the subjective assessment of the perceived quality of video calling services delivered on a real LTE/4G network. The main goal is to determine the list of parameters that are predominantly impacting the Quality of Experience (QoE). The influencing parameters...
The Voice over IP (VoIP) service demands high priority over other services and applications. Some constrains are associated with this real-time service, such as delay and throughput which need to be addressed before delivering to the customer. The mobility in IP networks is a demand that facilitates IP applications and services, especially in wireless networks. This paper demonstrates the performance...
In recordings of naturals environments there is often a predominant color due to the type environment such as a forest, a desert or ocean. Currently, there are a wide range of available video codecs that provide different compression results for different types of videos based on their predominant colors. Any way to save video flows bandwidth becomes a system to save or earn money. In this paper,...
Long Term Evolution (LTE) is a 3GPP standard for wireless transmission systems. It is also the first 3GPP wireless standard full IP-based. Due to its possibility to reach very high throughput (e.g. 100 Mbps in downlink), an efficient end-to end QoS treatment is needed in order to guarantee a good QoS perceived by end user (QoE). Voice service delivered by LTE systems is Voice over IP (VoIP) service,...
This paper describes how user-specific QoS requirements are a critical innovation that may be used to improve spectral utilization in wireless systems. Rate adaptation and MAC scheduling algorithms that process user-specific QoS to improve system capacity are proposed and evaluated. Through dynamically adapting the AMR codec mode or video data rate and the MAC scheduling algorithm to the user-specific...
Voice over Internet Protocol (VoIP) has become a recent topic of research in both the Internet and the Telecommunication industry. The terrific increase in popularity of VoIP services is a result of huge growth in broadband usage. Both in wired as well as in wireless communication, VoIP is replacing the traditional telephony techniques. To ensure a good quality speech through VoIP, certain Quality...
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