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Quality of Service (QoS) is primary characteristic of Mobile Ad hoc Networks (MANETs) with power as a vital ingredient. A MANET topology considers minimum power management scheme for routing the packets from source to destination. Due to dynamic mobility of nodes power conservation in MANET environment becomes challenging. Normally Routes break during the data transmission. Failure of routes will...
An appropriate selection is of great importance to Web service composition. Current approaches normally focus on the average performance of quality of service (QoS) of Web services while not paying more attention to the performance such as stability considering the changing environments. In addition, Web services are differentiated from others with same functions which are provided by various physical...
In Recent times, real time applications are increasing gradually which have specific Quality of Service (QoS) requirements. IEEE 802.11e is aimed to provide such QoS. 802.11e uses traffics differentiation among flows using a parameter set. The flows are admitted using their priority. The voice and video flows are admitted in most of the times due to their higher priority. This causes the increase...
Software Defined Networking (SDN) is in the process of revolutionizing the way of managing networks by providing a new way to support current and future services. However, by relocating the control functionality in a remote entity, the measurements' accuracy of the resources' utilization becomes more difficult, which complicates the decision making. Although there are previous works focusing on the...
Network densification is currently seen as one ofthe key techniques enabling Radio Access Networks (RANs) tomeet the performance and functional requirements of the 5Gparadigm in urban areas. Avoiding the connection of small cellsto the power grid facilitates their deployment and reduces bothcapital and operational expenditures (CAPEX and OPEX). Inthis paper, we propose an approach to enable net-Zero...
QoS guarantees for real-time HD video transmission can be assured by proper resource allocation. The TFD option of the IP protocol can be used to convey signaling information about required resources for a given transmission. In this paper the new traffic description for TFD option, based on analysis of scene changes, is presented. The traffic description was carried out in two stages. First, scene...
Today's datacenter is shared among various applications with different QoS requirements, which poses a great challenge to deliver low delay transport with high throughput. Most of works address this challenge by reducing the in-network delay, but assumes a negligible local delay. However, we show that this assumption does not hold for a multi-tenant datacenter that a physical machine is shared by...
Quality of service (QoS) requirements have paved the way to a great deal of research about scheduling and resource allocation mechanisms. The fairness and throughput maximization have been considered as classical techniques. These techniques fail to fit with different QoS requirements over the Long Term Evolution (LTE) systems. These QoS requirements are presented in the form of scheduling priorities,...
The EDCA protocol was designed to enhance the functionality of the IEEE 802.11 WLAN through the introduction of different channel access parameter values for different traffic types. This enables some degree of service guarantee for traffic depending on their QoS requirements. While the improved standard has recommended values for the channel accessing parameters, it does not take into account the...
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...
Adaptive modulation and coding (AMC), power control (PC) and automatic repeat request protocols (ARQ) represent very important link adaptation (LA) techniques for future generations of wireless communication systems. In order to improve the efficiency of these systems, some combination schemes of these LA techniques have been proposed in the literature. Most of these schemes were interested in the...
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...
The exponential increase in capacity and data rate demands, along with the diversification of use cases and verticals that are planning to use cellular radio access networks (RANs) to provide connectivity, has prompted the development of the fifth generation (5G) of radio access technology. Traffic steering, which aims at optimum mapping of the data flows to the appropriate RAN access points (APs),...
Smart Grid (SG)-aware cellular networks are expected to decrease their energy consumption and consequently decrease the global carbon emissions. At the same time, cellular operators are required to meet the end-user requirements in terms of throughput. In this paper we propose a novel strategy to pave the way for the cellular operators to integrate with the SG. Our strategy is based on Dynamic Spectrum...
In order to solve the problem of on-board optical burst switching assembly algorithm cannot realize completely QoS guarantee, an on-board optical burst switching weight-weighted round robin assembly algorithm based on the QoS guarantee(QWRRA) is proposed in this paper. In this assembly algorithm, IP packet will be inserted in different queue according to the different destination and QoS level when...
This paper aims to improve the QoS of IEEE802.11e standard. It is intelligently performed by adjusting the contention parameters of the MAC layer based on desired priorities of the nodes. We focus on CW and AIFS that are used for calculating the back-off time to have traffic priority in accessing the channel in EDCA part of IEEE802.11e standard. The proposed scheme is called SN-EDCA (Smart Node-EDCA)...
File-sharing is an important feature for web real-time applications. The traditional way of implement file-sharing is uploading files to file server by a sender, then receivers can download and display on browsers in time. With the increasing awareness of the data security, the way hosting file data by a third party server can not meet the needs of users. Discarding the server side seems like a good...
The IEEE 802.16m based broadband wireless access is a promising technology to provide high speed and wide coverage communications for wireless users. However, how to achieve the desired utilization of the radio frequency bandwidth resource in such networks is an open issue as it covers the radio channel capacity exploitation, channel transmission bandwidth utilization optimization and resource utilization...
For service level agreement aware service composition problem, the sharing property is integrated into it to further decrease the cost and make more applications can be successfully deployed. Based on the characteristic of this problem, the attributes of throughput, latency and cost are simultaneous considered and a multi-objective service sharing optimization model is built. To make more feasible...
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...
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