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The dynamic and shared nature of wireless medium imposes an adverse barrier to supporting QoS for video streaming applications in wireless networks. In this paper, we investigate a case study of video streaming in a wireless mesh network to obtain important observations on the factors which impact video quality in multihop wireless mesh networks. Based on our analysis of the case study, we propose...
This paper presents a Cross-layer Network Management System (NMS) that allows Service Providers (SPs) to perform cost-effective network resource reservations with their Network Operators (NOs). The novelty of our NMS is that it offers a fresh and promising approach to use the end-users satisfaction level as the metric to perform the resource management. We show that our system is capable of achieving...
Providing wireless service without spatial restriction has been realized due to rapid growth of IEEE 802.11 based wireless technologies. Recently, available bandwidth ("AB") estimation of the wireless medium has received much attention with the widespread use of real-time multimedia applications which requires certain level of QoS (Quality of Service) guarantees. In this paper, we propose...
The mobile cellular systems are expected to support multiple services with guaranteed Quality of Service(QoS). But, the ability of wireless systems to accommodate expected growth of traffic load and broadband services is limited by available radio frequency spectrum. Call Admission Control (CAC) is one of the resource management functions, which regulates network access to ensure QoS provisioning...
We present a scheme for flow management with heterogeneous access technologies available indoors and in a campus network such as GPRS, 3G and Wi-Fi. Statistical learning is used as a key for optimizing a target variable namely video quality of experience (QoE). First we analyze the data using passive measurements to determine relationships between parameters and their impact on the main performance...
An adaptive resource management scheme for LEO satellite networks supporting multiple classes of multimedia traffic with different Quality of Service (QoS) requirements is proposed in this paper. The key ingredient in this scheme is a novel reserved bandwidth sharing strategy that contributes to achieving high bandwidth utilization by exploiting the dynamic characteristic of reserved bandwidth. Based...
In realistic mobile heterogeneous environment, the quality perceived by user is variable and dependant on following major factors: available bit rate variation, packet loss and latency. Even though QoS management is enabled in most modern telecommunication systems, it does not ensure the actual end-user perceived quality of service level. Therefore, to make sure that operator follows SLA provisions,...
This paper considers optimizing the utilization of radio resources in a heterogeneous networks consisting of a WLAN and a CDMA network. We propose a joint admission control scheme for multimedia traffic that exploits vertical handoffs as an effective tool to enhance radio resource management while guaranteeing handoff users' QoS requirements. The network resources utilized by the vertical handoff...
This paper deals with an algorithm of the Satellite Terminal, more precisely, it contributes to the Quality of Service management of the return link, a central problem in satellite network (compared to wire network) due to the satellite delay and the scare uplink resources. Instead of oversizing the connection, which could be very expensive, we aim at reaching an optimal exploitation of uplink resources...
With the rapid development of network technology and network services, the users' requirements of network QoS are also improved. The traditional Active Queue Management(AQM) mechanisms are not adequate to provide QoS guarantee to multimedia video traffics effectively. To provide better quality of service to the multimedia applications in Mobile Ad Hoc Network(MANETs), whose resource is limited and...
Wireless networks will carry various multimedia applications such as voice, video and data in the future. In order to provide service quality for delay sensitive applications such as voice and video, it is necessary that mobile ad hoc networks (MANETs) support quality of service (QoS) routing in terms of bandwidth and delay. Content-based communication is a competent candidate for such dynamic networks...
In this paper, we propose a network performance monitoring method which can measure delay of each network using the RTCP(Real-time Transport Control Protocol) timestamp fields to detect a trouble section in interworking environment. According to the increment of real-time multimedia service provision, network performance monitoring method is necessarily needed for QoS management of real-time services...
Paper develops investigations of the network resident adaptation functions, the impact of reconfigurations to end-user service provisioning as well as the cost of network operation and maintenance, following the requirement that functions for efficient Software Download (SD), End to End Reconfiguration (E2R) and QoS enhancements need to be implemented Carry out Feasibility study of Dynamic Network...
The advent of IP communications challenged the use of legacy charging methods. Moreover, the diversity of Internet applications complicates the deployment of charging schemes in converged networks. Charging requires the collection of accounting information of resource usage, a process that consumes system resources that are needed for service delivery. Flat rate charging is popular on the Internet;...
As telecom service providers worldwide are deploying next generation networks (NGN) to offer multimedia services, they have recognized that traditional network management principles based on ITU-T's telecommunications management network (TMN) model is no longer sufficient. To provide multimedia services that would satisfy customers' service quality demands, they must implement the new management model...
Next Generation Network (NGN) management represents an enormous challenge due to the large number of managed elements, the variety of roles the managed entities play in the network and the difficulty of orchestrating management actions. Several NGN standardization bodies point toward policy based management as the best approach for NGN network management. This paper describes a management solution...
The approach currently being taken by ETSI (BSM) to standardisation for performance management (and in particular monitoring) is described. This paper describes parameters, instruments and methods that can be used to manage a BSM sub-network. The final objective is to arrive at a consensus for a standard on this subject.
The following topics are dealt with: coding; modulation; broadband satellite multimedia; telecommunication security; radio resource management; interplanetary communications; free-space optical links; quality of service; and delay tolerant networking.
Recently there has been a renewed interest on mobile communications via satellite. Therefore, the DVB-S2/-RCS standard has been updated with some countermeasures to combat fading effects of the mobile scenario. The focus of this paper is on multimedia traffic management on the DVB-S2 forward link to collective terminals on trains. In our study, we consider ACM, PHY margins, and LL-FEC coding to counteract...
The following topics are dealt with: reliability; quality of service; computer networks; radio networks; telecommunication network management; communication theory; protocols; telecommunication network routing; OFDM systems; telecommunication channel; multimedia communication; and optical communication.
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