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Resource allocation mechanisms are important in assigning all available resources in the network. Scheduling is one of the resource allocation mechanism which will determine the performance of the network. This paper provides the performance analysis on three different scheduling algorithms in the Long Term Evolution-Advanced downlink transmission system with realistic channel model for urban macro...
Long Term Evolution (LTE) is a breakthrough in broadband technology which aims to support several high level quality and real time multimedia services for the mobile users. This paper proposes a resource block preserver (RBP) scheduling algorithm which optimizes the performance of the downlink transmission system in LTE network. The resource block preserver algorithm has two layers, upper and lower...
Carrier aggregation has been introduced by 3rd Generation Partnership project (3GPP) in order to meet the IMT-Advanced requirements. Using carrier aggregation, multiple component carriers with a different bandwidth, dispersed within intra or inter bands can be simultaneously utilised to provide higher data rates, better coverage and lower latency resulting a better user experience. However, carrier...
Machine to machine communication (M2M) or machine type communication (MTC) facilitates communication without any human intervention. These applications will support an enormous number of stations (STAs). To mitigate degradation of the throughput and delay performance in wireless local area networks (WLAN) that employ carrier sense multiple access collision avoidance (CSMA/CA) protocol with request...
Device to Device (D2D) communications are an important part of next generation wireless systems, and a key technology to improve local services and overall system throughput. This paper proposes Optimized Network Coding (ONC) to boost the performance of D2D communications. ONC leverages on using network coding combined with improved scheduling to increase the throughput of D2D links. We describe the...
Long Term Evolution (LTE), a standard developed by the 3rd Generation Partnership Project (3GPP), is currently the 4G mainstream technology, providing technology convergence for this generation of cellular communication systems. LTE networks promise data transmission rates of 100 Mbps in the downlink channel. For this high throughput it needs to optimize the use of network resources. LTE uses scheduling...
Recently, wireless LANs are utilized in various situations. However, inefficient channel utilization is still a serious problem. One of effective solutions is to prevent packet loss and to transmit packets at a higher rate. While the backoff algorithm in IEEE 802.11 avoids only the packet loss caused by collision, other existing works tackle the packet loss caused by channel fading by transmitting...
In this paper, we present a novel request algorithm for distributed scheduling in wireless mesh networks (WMNs). In the distributed scheduling, each node determine its own scheduling such as transmission time and resource allocation according to three way handshaking procedure composed of request, grant, and confirm messages. The proposed request algorithm called multi-link request (MLR) allows each...
The increasing demand for data traffic through high capability mobile devices and the trade-off between revenues and costs for upgrading the communication infrastructures strongly push the network operators to make the best use of the available network resources, which renews and reinforces the interest on resource management strategies. In this respect, a key challenge consists in finding a proper...
To significantly enhance the overall capacity of future cellular systems, LTE-A specifications have recently introduced the possibility to make available multiple carriers for a given base station (this technique is known as Carrier Aggregation), thus increasing the number of physical resources available for mobile users. The Radio Resource Management process, which aims at distributing physical resources...
Scheduling is very important in real time environment, where users must be provided services by considering factors like QoS and channel quality. A novel analysis on the performance of downlink packet scheduling algorithms in Long Term Evolution (LTE) networks is presented. LTE with multimedia traffic is modelled with Network Simulator (NS-3) in compliance to 3GPP specifications. This paper analyses...
In this paper, the optimal scheduling problem is studied to maximize network utility according to proportional fairness policy in multi-user multiple-input and multiple-output (MU-MIMO) uplink cellular networks. An optimization framework is developed to maximize the aggregate utility and to compute the optimal scheduling parameters in a single cell cellular network. The optimization problem is a very...
In this paper, the optimal scheduling problem is studied in multi-user MIMO (MU-MIMO) single-hop uplink cellular networks. An optimization framework is developed to compute the optimal max-min throughput and the optimal scheduling of the users. The optimization problem is found to be a very complex linear program. The optimization problem is solved for several medium size cellular networks using an...
A real-time adaptive resource allocation algorithm considering the end user's Quality of Experience (QoE) in the context of video streaming service is presented in this work. An objective no-reference quality metric, namely Pause Intensity (PI), is used to control the priority of resource allocation to users during the scheduling process. An online adjustment has been introduced to adaptively set...
Distributed Stream Processing Systems (DSPSs) are attracting increasing industrial and academic interest as flexible tools to implement scalable and cost-effective on-line analytics applications over Big Data streams. Often hosted in private/public cloud deployment environments, DSPSs offer data stream processing services that transparently exploit the distributed computing resources made available...
Novel applications such as micro-blogging and algorithmic trading typically place a very high load on the underlying storage system. They are characterized by a stream of very short requests, and thus they require a very high I/O throughput. The traditional solution for supporting such applications is to use an array of hard disks. With the advent of solid state drives (SSDs), storage vendors are...
In this work, we propose a dynamic Inter-Cell Interference Coordination (ICIC) and scheduling for LTE-A system. The objective is to enhance edge users' throughput and guaranty fairness among all users in the cell. Based on Reference Signal Receiving Power (RSRP) values collected from a set of collaborative base stations, users are classified into: cell edge or cell center. Then, a simple static power...
In order to address the ever increasing high capacity demands, next generation wireless networks are required to revolutionize the infrastructure design and air interface technologies. In this paper, we introduce a cooperative non-orthogonal multiple access (NOMA) technique with successive interference cancellation (SIC) in wireless heterogeneous networks. Aiming to improve the system capacity, the...
Recently, inter-session opportunistic network coding has been considered as a promising technology for improving the performance of a wireless multi-hop network (WMN). However, most existing work in this field did not consider the issue of how the wireless medium is accessed could largely affect the performance of localized network coding. In this paper, we theoretically analyze the throughput improvement...
Time-frequency resource conversion (TFRC) is a recently proposed network resource allocation strategy. By exploiting user behavior, it withdraws spectrum resources strategically from connection(s) not focused on by the user, to relieve network congestion effectively. Aiming at supporting the exponentially increasing traffic volume, especially on-demand data services, in this work we propose TFRC-based...
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