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This paper presents an iterative contending-user estimation method to analyze the normalized throughput, the packet-dropping probability, the average access delay, and the variance of the access delay for finite-population slotted ALOHA system supporting multiple access-class traffic. We demonstrate the way to extend the model to accurately predict the access delay of small data transmissions in OFDMA...
In this study, we describe the behavior of LTE over the sea and investigate the problem of radio resource block allocation in such SINR limited maritime channels. For simulations of such sea environment, we considered a network scenario of Bosphorus Strait in Istanbul, Turkey with different number of ships ferrying between two ports at a given time. After exploiting the network characteristics, we...
The frequency spectrum is an expensive and limited resource while the massive demand of telecommunication services both of data and number of connection continue to raise. The ordinary network becomes denser to meet the growing needs of the services. It can be done by introducing more cells in the network, with lower coverage than the ones that already exist or simply by splitting the existing cell,...
LTE/LTE-A is high speed wireless communication technology which got evolved from 2G/3G. LTE provides very high throughput in uplink and downlink and hence it is attracting more and more subscribers every day. This paper analyzes the performance of real time LTE network of two different LTE service providers through drive test. Test cases were performed under dynamic environment where the test user...
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...
Due to the requirement of high capacity to access broadband service as well as high spectrum efficiency, the frequency reuse of one is targeted to be applied in LTE network planning. But it can lead to a worse inter-cell interference levels experienced especially by users located at the cell edge area. Soft Frequency Reuse (SFR) is considered as an effective frequency reuse scheme for inter-cell interference...
Mobile phone users today require high-speed data communications to be able to enjoy some services. To always provide the best service to customers and anticipate the overload on the network, there needs to expand capacity with the implementation of LTE technology in areas of overload. Bandung including densely populated cities and buildings, which in doing expand network capacity is constrained by...
Long Term Evolution (LTE) is a standard proposed by 3GPP (3rd Generation Partnership Project) which capable of enhancing the performance of wireless system. However, fulfilling the indoor service requirements by extending the LTE coverage is insufficient since it is very difficult for the network operators to provision the QoS in the building. Hence, the deployment of Femtocell which complements the...
Nowadays, the current trend is to integrate WiFi with Long Term Evolution (LTE) networks in order to meet the growing demand for huge amounts of data traffic and provide ubiquitous coverage. Seamless mobility between heterogeneous networks with the required Quality of Services (QoS) provisioning for Mobile Terminals (MTs) is one of the most challenging issues while considering LTE-WiFi integration...
Mobile internet has been widely adopted and it is expected to rise to almost 4 billion users by 2020. Despite the research effort dedicated to the enhancement of its performance, there still exists a gap in the understanding of how TCP and its many variants work over LTE. To this end, this paper evaluates the extent to which five common TCP variants, CUBIC, NewReno,Westwood+, Illinois, and CAIA Delay...
Long Term Evolution (LTE) wireless communication system has adopted Orthogonal Frequency Division Multiple Access (OFDMA) technology to provide downlink transmissions to multiple User Equipment (UE) in a single transmission time interval. In OFDMA, UEs provide quantized channel quality information, called channel quality indicator (CQI), to the base station. CQI feedback is then used at the base station...
In recent years, vehicular communications have attracted much attention both in the research and technology development communities. What is more, they have been considered a very important use case not only for the most important current broadband wireless standards such as Long Term Evolution-Advanced (LTE-A), but also for the emerging generation communication systems included in the 5G framework...
In this demonstration we present a platform that encompasses all of the components required to realistically evaluate the performance of Dynamic Adaptive Streaming over HTTP (DASH) over a real-time NS-3 simulated network. Our platform consists of a network-attached storage server with DASH video clips and a simulated LTE network which utilises the NS-3 LTE module provided by the LENA project. We stream...
Uploading of huge files to cloud servers through mobile communication has been becoming more popular in recent years. However, current uploading throughput is frequently limited due to bottlenecks in server processing ability and/or narrow bandwidth sections of networks. For this study, we aimed to improve the user experience of uploading in future wireless access environments. We propose a novel...
In the context of a heterogeneous mobile environment, we analyze the eNodeB (eNB) Radio Link Control (RLC) buffer overflow problem for the 4G/LTE network, and show the benefits of deploying Active Queue Management (AQM) strategies at wireless access links. In order to satisfy the increasing demands of wireless mobile communications, LTE has been proposed as an all-IP-based network to bring higher...
Scheduling technique plays a significant role in distributions of Resource Blocks (RBs) in LTE system. In order to ensure the LTE system operates efficiently, the scheduler needs a good trade-off between the overall cell throughput and the fairness to all the users' equipment (UEs) in its respective cell. Improving the overall cell throughput while maintaining its fairness level is very crucial in...
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...
Licensed-assisted access (LAA), which conveys control signal via licensed anchor carrier and data information via both licensed and unlicensed bands, is a promising solution to enhance the throughput of wireless communications. In view of the potential impact on the incumbent services in the unlicensed band, how to design the medium access control (MAC) protocol for LAA system to make fair and friendly...
Random Linear Network coding (RLNC) has emerged as a promising solution for reliable multimedia delivery over mobile cellular networks. In this paper, we deploy Application Layer-RLNC (AL-RLNC) on the top of the existing Hybrid Automatic Repeat Request (HARQ) in 4G Long Term Evolution (LTE) networks. A simple implementation scenario composed of a user equipment, an eNB and a remote host is considered...
The mechanisms of allocating the resources in Long Term Evolution (LTE) cellular networks are very critical issues, because scheduling algorithms have the main responsibility for determining how to allocate radio resources for different users. In this work a dynamically adopted Proportional Fair (PF) scheduling strategy for capacity enhancement of LTE system is proposed. Performance comparison with...
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