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The rapid growth of traffic demands has posed challenges and difficulties on both the radio access networks (RANs) and the backhaul links. To stress these problems, caching technology, more specifically, caching user contents at the infrastructures of different RANs is proposed as an effective approach. In this paper, we consider the joint user association and cache content placement problem in cache-enabled...
Upload and download traffic often coexist in mobile networks. However, TCP download throughput could be substantially degraded by upload traffic even if the downlink is not the bottleneck. Previous works such as RSFC and TCP-RRE can substantially improve TCP download throughput in the presence of concurrent TCP upload flows, albeit at the expense of significantly degraded upload throughput performance...
We analyze the performance of IEEE 802.11ah technology in an actuation use case for connected lighting from the perspective of latency and power consumption at the actuator in the downlink direction. The study includes network configurations with different beacon frame transmission intervals, channel bandwidths, group of stations in power-save mode as well as unicast-multicast transmissions using...
Cloud resource management experienced massive strategy development throughout recent years. A traffic scheduling pattern becomes more significant in Cloud for adapting heterogeneous processing demands. We present priority-based traffic scheduling for downlink resource management aims to sustain Quality of Services (QoS) in Cloud which provide Cost-Effective Best Effort service (CEBE). Our traffic...
With an increasing use of Long-Term Evolution (LTE) in mobile networks, it is necessary to evaluate its performance. In this paper, we evaluate the performance of Long Term Evolution (LTE) for mobile networks under Transmission Control Protocol (TCP) traffic. We evaluate the performance of LTE for TCP traffic for both the directions uplink as well as downlink. During the evaluations, we focus on the...
Demands for multimedia application have been raised in the current technology era. Multiple simultaneous users may be streaming video or using VoIP call. Thus a better solution to ensure the QoS satisfaction for LTE downlink needs to be designed. Existing algorithm such as Modified Largest Weighted Delay First (MLWDF) have been widely used to cope with the situation arise. Still the need to inquire...
A large number of studies in the fields of consumer research, psychology and sociology have shown that individual user decisions influence people's satisfaction and likeability in the context of service consumption. However, so far this user-related aspect has been neglected in the context of QoE. To address this issue, we conducted three empirical user studies in which the participants were able...
Long Term Evolution-Advanced (LTE-A) is increasingly seen as a promising technology for serving Internet of Things (IoT) needs along with mobile user equipments (UEs), due to high data rate, low latency, priority services, etc. The major challenges of incorporating IoT devices into LTE-A are, a large number of IoT devices attempting to access the network in short time, their effect on existing UEs...
Large multimedia files are accessed by a high number of mobile users over the Internet. Therefore, the bandwidth demand for mobile Internet access is increasing exponentially. To answer users' demand, carrier aggregation is proposed in LTE-A. In carrier aggregation, the best available one or more component carriers of each band are assigned as primary and secondary component carriers to each user...
Internet usage over mobile devices is on the rise. The bandwidth demand for mobile Internet access is also increasing with the number of mobile users. To answer users' demand, carrier aggregation is proposed in LTE-A system. In carrier aggregation, the best available one or more component carriers of each band are assigned to each user to provide efficient services. Several works have been reported...
Excessive buffer sizes in access networks may result in long delays, the effect known under the name of bufferbloat. There exist mechanisms that can solve the problem, however their deployment may be difficult or not feasible. In this paper, we explore other approaches that may bring better performance if the known solutions cannot be applied. Our main finding is the paradoxical observation that adding...
Recent years, the demands of wireless networks in Taiwan grow fast because of users almost take a cam call or watch video streams on you tube. How to fulfill most users' demand under limited wireless internet resources situation becomes an important issue. In wireless networks resource management, the design of schedulers is the most important part. This paper proposed a scheduling scheme that meets...
The data traffic volumes are constantly increasing in cellular networks. Furthermore, a larger part of the traffic is generated by applications that require high data rates. Techniques including Coordinated Multipoint transmission (CoMP) can increase the data rates, but at the cost of a high overhead. The overhead can be reduced if only a subset of the users is served with CoMP. In this paper, we...
LTE has been identified as a new wireless standard by the 3rd Generation Partnership Project (3GPP) which is using the VoIP to transmit the voice services and packet the data for all services. Traffic scheduling plays an important role in LTE technology by assigning the shared resources among users in the most efficient manner. The main objective of this paper aims to design an efficient scheduling...
Managing and allocating available resources are vital in communication networks in order to attain a network design objective while keeping great satisfaction in quality of service (QoS) for all users. Resource allocation in multi-cell system can be described as maximizing of a system utility by allocating transmits power among users and spatial directions. Different resource scheduling algorithms...
In smart grid, the communication system plays an important role in the management and control of all fields of the electrical grid. As a popular wireless broadband communication technology, the Long Term Evolution (LTE) radio access technology defined by the 3rd Generation Partnership Project (3GPP) provides a promising solution for communication networks used in smart grid. Since Time Division Duplexing...
Fairness assurance in modern access networks constitutes a focal point of interest since it dramatically affects the quality of the provided services to the final users. Traffic balancing entails fair bandwidth distribution along with efficient service provisioning, inaugurating a challenging tradeoff between the system throughput and fairness. In this paper, the downlink scheduling effectiveness...
In this paper, a group based preamble selection is proposed for dynamic assignment of bandwidth to User Equipments (UEs). Conventional non-group based preamble selection suffers from low detection probability under multipath fading channel namely extended vehicular A (EVA). The contention BR in Long Term Evolution (LTE) networks shows improved performance when group based preamble selection is combined...
According to different priority based services, IEEE 802.16e WiMAX standard classifies packets as UGS, RTPS, eRTPS, nRTPS, BE. The standard treats all packets generated while browsing the internet as delay tolerant packets and classifies them as Best Effort (BE) packets. This includes BE packets generated while browsing secure websites. However, secure transactions are governed by time constraints...
In this paper, we propose an analytical model to evaluate the average packet delay and its standard deviation in a saturated IEEE 802.16 network. In addition, the bandwidth utilization of an uplink data frame and packet loss probability are also derived from the model. We show that our analytical model is accurate for a range of parameters by comparing it with simulation results. Using the analytical...
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