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In this paper, we study an adaptation method for mobile streaming over HTTP/2. Beside leveraging the server push feature of HTTP/2 to reduce request-related overheads, the proposed method can improve video quality by delivering gradual video bitrate transitions. Experimental results show that our method can provide smooth video quality while resulting in a low number of requests over a whole session.
Design of underwater wireless sensor networks (UWSNs) is difficult because of limited battery energy of sensor nodes. Low bandwidth and energy consumption are major problems that we face in UWSNs, due to dynamic behavior of water in underwater environment. In our scheme, circular field is divided into ten sub-regions and each region is divided into eight sectors. Two mobile sinks move to cover the...
With the rapid development of smart handled devices and mobile internet services, mobile network operators (MNOs) have experienced an explosive growth in traffic demand in cellular access networks. Intelligently offloading traffic through small-cell networks has been widely considered as an efficient approach for MNOs to relieve traffic congestion in cellular access networks and accommodate more mobile...
In this paper, we focus on the resource allocation based on scheduling algorithms. Unlike the existing solutions, we introduce the concept of Proportional-Integral-Derivative (PID) controller in the scheduling algorithm called PID-Scheduler in order to reach the system stability. The stability is considered in terms of throughput and delay which meet the nodes needs. In order to allocate the resources...
Following the explosion of Internet-enabled mobile devices and mobile services, users tend to expect network connectivity everywhere they go and at any time. In anticipation of these higher connectivity expectations and requirements especially for vehicular communication, several technologies like WiMAX, cellular networks (i.e., 3G/4G) and wireless mesh networks have been developed. While cellular...
Multi-hop relaying has been considered as a key technology for future wireless communication networks to overcome coverage and capacity problems in 5th generation mobile networks (5G). Recently, there has been increasing interest from 3GPP operators to integrate multi-hop relaying functionalities into LTE-A standards. However, many issues remain to be resolved due to the complexity of the multi-hop...
Due to unique characteristics of underwater environment, it is difficult to achieve energy efficiency, high throughput and low bit error rate. Radio signals do not propagate well in underwater environment so acoustic signals are used for communication. Acoustic signals offer low bandwidth, high bit error rate, low throughput and high end-to-end delay. Data packets often loose their path which effect...
Compared to current mobile networks, next-generation mobile networks are expected to support higher numbers of simultaneously connected devices and to achieve higher system spectrum efficiency and lower power consumption. To achieve these goals, we study the multi-sharing device-to-device (D2D) communication, which allows any cellular user equipment to share its radio resource with multiple D2D devices...
In literature, dynamic planning (base station (BS) on-off switching) is proposed as an efficient approach for energy saving at a low call traffic load condition. All related research efforts aim to employ dynamic planning to save energy for the network operators while satisfying the quality-of-service (QoS) for downlink mobile users. On the other hand, although switching off a BS can save energy for...
We study in this work user impatience by adopting a realistic realization: a user gets impatient when its throughput falls below a certain threshold for a given patience duration. We model such a behavior in a cellular network, transporting elastic flows, for a realistic user configuration with random arrivals, following a Poisson process, and departure after a finite duration, either upon transfer...
The Mobile Ad-hoc Network (MANET) is a volatile network, the nodes are in the movable state. The node can easily enter and exit from the network. The attacker node can easily enter into the network and affect the performance of the network. The malicious nodes are difficult to detect as any node can enter into the network easily. The detection of the malicious node is very important to secure and...
This paper deals with a method for QoE evaluationfor the services transmitting large amount of data perceived by the end user in relatively short time periods, e.g. streaming video in mobile operator network. Surprising factor of the new method relies on QoE/MOS evaluation, which is based on the smallest building unit which is a frame for a video session and evaluating throughput, packet delay and...
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,...
We propose a bandwidth allocation scheme utilizing simple statistical traffic analysis for TDM-PON based mobile fronthaul. Experiments show that excess bandwidth allocation can be reduced while achieving latency under 50 μs.
Mobile Content Delivery systems are becoming more popular with the increasing capacity demand by mobile subscribers. In order to reduce the total outgoing traffic a Content Delivery System for Mobile Operators (mCSDN) was proposed. The strength of the proposed system inspired by the idea of using Device-to-Device Communication (D2D), and Software Defined Networks (SDN) based middleware as the orchestrator...
Extensive research is being done on Wireless sensor Networks (WSNs) in present decade. WSNs consist of large number of sensor nodes which perform sensing of certain phenomena and send the sensed data to the sinks. This operation consumes energy of sensor nodes which effects the lifetime of a network. To prolong the lifetime of WSNs various strategies and routing algorithms have been proposed. Use...
By large tsunami damage due to the Great East Japan Earthquake, many existing network system stopped functioning in various factors. Even under such circumstances, some of the information communication method that including satellite communications, it was able to recover the Network Connectivity, actually quickly and effectively. Although there are some valid information communicating method in disaster,...
Heterogeneous networks (HetNets) and multicell cooperation are two key technologies in cellular networks that can improve network performance. The channel information of all the collaborating Base Stations (BSs) is one of the core factors to achieve better throughput performance gain in the coordinated multipoint (CoMP) communication. Here, we propose a novel method for handling Channel State Information...
This paper describes the performance of a state-of-the-art cell range expansion (CRE) technique: an adaptive control CRE for enhanced inter-cell interference coordination (eICIC) in Heterogeneous Network (HetNet). The features of the proposed adaptive control CRE technique are described through comparison with those of conventional methods. With eICIC in a HetNet, system-level computer simulation...
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...
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