三网融合
2010-11-02 15:51:31 作者：cadmin 来源： 浏览次数：0
五、integration of telecom, radio and TV, and Internet networks
5.1 Triple play
C'est un autre vétéran d'Arianespace qui, début avril, a pris la suite de Michel Bartolomey à la tête de l'établissement de Kourou du leader mondial des lancements de satellites. En effet, Patrick Loire ne compte pas moins de vingt-sept années de bons et loyaux services chez Arianespace où il a franchi tous les échelons, débutant comme simple technicien pour arriver au poste de directeur.
5.2 The death of triple play: How broadband, satellite and cable operators were blindsided by consumer tech companies
FOUR YEARS ago, every provider who had a coaxial, broadband or cable socket in people's homes started to see if they could provide services in addition to their core offerings to the extent that each grasped the opportunity to provide video-on-demand, telephony and Internet services. However, the success of each type of player has been qualified. What went wrong? How did the providers miscalculate so significantly? The basic truth is that they all underestimated each other and how consumers would be able to see through their complex pricing structures and service agreements.
5.3 Admission region of triple-play services in wireless home networks
A heterogeneous wired and wireless network architecture is considered for home networks to support Internet Protocol TV (IPTV), voice, and data, the so-called triple-play services. To satisfy the quality of service (QoS) requirements for different traffic classes, class-based queueing (CBQ) is deployed at home gateways and routers. To estimate the network capacity and decide on an appropriate resource management scheme, we develop an analytical framework to quantify the maximum number of IPTV connections that can be supported with guaranteed QoS over wired and multi-hop wireless networks. We extend the fluid-flow model to capture both the burstiness of IPTV sources and the time-varying characteristics of multi-hop wireless paths. Heterogeneous traffic and CBQ are considered in the model. Simulation results over wired and multi-hop wireless paths are given which validate the analysis. The results presented provide important guidelines for the planning of future home networks for triple-play services. They also provide important insights into how to efficiently support heterogeneous traffic with stringent QoS requirements over wireless and wired networks.
5.4 Triple vision
Service providers are increasingly turning their attention to the concept of 'three-screen' delivery. But what does it mean in practice? Stuart Thomson searches for a definition. What is a 'three-screen strategy' and why is it important? The so-called 'triple-play' of offering TV, broadband and telephony (including mobile telephony) is well established, but it has until now largely been a matter of marketing three services in a bundle as a way to increase revenue per subscriber and reduce churn. The idea that platform operators could use their access to different devices used by their customer s inside and outside their homes as a way to offer new content-based services is something new.
5.5 Triple-play Services using Random Diagonal Code for Spectral Amplitude Coding OCDMA Systems
In this paper, a new code called Random Diagonal (RD) code for spectral amplitude coding optical code division multiple access (OCDMA) networks is presented. This code is compared with other codes like MQC, MFH and Hadamard which use the same technique. In our work, we utilized this code in one of the OCDMA applications which is called "triple-play" services (audio, video, and data) with different quality-of-service (QoS) requirements ; this service is performed by using multiple weights of RD code. The results characterizing the bit-error-rate (BER) with respect to the total number of active users show that RD code offers a significant improved performance over other types of codes. Furthermore, this code can accommodate 20 additional users with smaller code weight at BER of 10~(-9). In variable weight system, we have shown that using this type of system does not only suppress the Phase Intensity Induced Noise (PIIN), but also that RD code with large weight always have the best performance, when other users of different weights are present in the system.
5.6 Delivering Quadruple Play with IPTV over IMS
The interest in Internet Protocol Television (IPTV) services is increasing as these are perceived as a potential source of new revenues by telecommunications service providers. IPTV services are already being deployed by many of them around the globe and tend to be packaged as triple play solutions, including telephony and Internet or even quadruple play with wireless aspects.
5.7 TRIPLE PLAY, ADSL, IPTV, FTTH
Der AXS-200 SharpTESTER von Exfo setzt neue Massstäbe für das Testen und Zertifizieren von FTTH- und Kupfernetzen. Der modulare Tester ist leistungsstark, anwenderfreundlich, kostengünstig und ausbaubar. Im Kommunikationsbereich ist ein rasant steigender Bedarf für höhere Bandbreite in den Zugangsnetzen festzustellen, weil die Anbieter von Telefon-, Radio-, TV-, Internet- und Datendiensten immer mehr als Gesamtanbieter dieser Dienste auftreten.
5.8 The telcos triple play model has failed
Paul Budde, BuddeComm The incumbent telcos have largely failed to use triple or quadruple play effectively as a mechanism to propel themselves into the new market of digital media. From a marketing perspective this was not exactly a forgone conclusion, but perhaps
5.9 Performance Evaluation Study For Qos-aware Triple Play Services Over Entry-level Xdsl Connections
Nowadays IT and telecom worlds and specifically all network, service, and content providers show special interest in multiservice delivery. The concurrent provision of video or TV content, voice, and fast Internet via the same network and user equipment, known as "triple play service", constitutes one of the major concerns in modern telecommunications due to the latest developments in the areas of video and audio encoding which strain the capacity of content delivery systems. The combination of the above technologies has raised significant quality of service related issues. Problems such as full exploitation of available bandwidth, providing adequate quality of service to subscribers and meeting the requirements of all three supported services (video, voice, and data), must be addressed. Based on this framework, the paper examines the performance of the most common packet scheduling techniques (PQ, WFQ, WFQ-LL) used in IP triple play architecture, considering also two different packetization schemes applied to single-layer video. The performance of these scheduling algorithms is assessed, in order to propose the most appropriate solution, supporting the triple play bundle. The evaluation of schedulers is based on simulations designed taking into account existing triple play networks, while trace files are used for the simulation of video flows.
5.10 STA of Andorra deploys Comverse IPTV solution to enhance its triple-play offering
Comverse, a supplier of software and systems enabling network-based multimedia-enhanced communication and billing services, announced that STA, the Andorran telecommunications operator, has enhanced its triple-play offering by deploying the Comverse IPTV solution.
5.11 Triple Play: How Do We Secure Future Benefits?
Recent technological developments make it possible to provide all telecommunications services (TV, telephony and internet) via the TV cable and fixed telephony network. Moreover, a new infrastructure based on optical fibre (to the home) is emerging in some places, which may in the future replace both existing networks. Making use of the available economic literature, the paper analyzes some of the consequences of the emergence of one electronic communications market. It focuses on two policy issues: the consequences of convergence of technologies and competition between networks for regulation in the short and medium runs, and the role of public investment in the rollout of optical fibre. It concludes that the present state of regulation may have some undesirable effects in the face of convergence and that public investment in a new general purpose infrastructure may have important advantages.
5.12 Lexcom chooses Wave7 Trident7 FTTH network system for complete triple-play network overlay
Lexcom, a full-services communications company based in Lexington, North Carolina, is deploying the Trident7 Universal Access Platform from Wave7 Optics to provide a triple-play of RF and IP video, voice, and data services to homes and businesses throughout their service region. Wave7 Optics is a supplier of GE-PON and GPON standards-based FTTP (fiber-to-the-premises) equipment for residential and business services.
5.13 Monitoring der Triple Play Performance
IP-basierte Netze werden nicht nur für den Internet-Zugang sondern auch für Triple-Play-Zusatzangebote genutzt. Neue Dienste wie VolP oder IPTV erfordern einen besseren Kundenservice und ein intelligenteres Performance-Monitoring.
5.14 Combining Push and Pull Scheduling for Mobile Data Broadcasting in Convergence Networks
Considering digital multimedia broadcasting (DMB) with reverse channels, we propose a novel scheduling algorithm for data dissemination as a combination of push and pull schemes. After collecting statistics of requests from clients, the server partitions the data items into hot and cold sets, according to the number of requests. The broadcast server schedules and broadcasts hot items periodically based on a push algorithm. On an empty slot between hot items scheduled, the server broadcasts a cold item based on an on-demand pull mechanism. Simulations show that our proposed algorithm achieves high successful response ratio with a response time small enough to be practical.
5.15 Operations support systems and technologies for broadband convergence networks and services in Korea
In the past few years, Korea has been leading the world in the areas of high-speed broadband Internet infrastructure, Internet household penetrations, online games, Internet shopping, cyber trading, and a variety of value-added services. To achieve these, the government, service providers, and vendors have made lots of investments in building the high-speed broadband Internet infrastructure over the past 10 years. Recently they have been building new high-speed backbones (e.g., BcN) and access networks (e.g., WiBro, HSDPA, DMB). In order to support the operations and management of these networks and services, service providers and vendors have developed various operations support systems (OSSs). Many of these OSSs have been developed with international/industry standards and state-of-the-art technologies. Some of these have been deployed for the first time since no such networks and services yet exist in the world other than in Korea. The articles that are included in this issue will help readers understand the cutthroat competition in telecommunications market, operations and management technologies, advanced customers needs and future trends in Korea.
5.16 Flow-Aware Link Dimensioning for Guaranteed-QoS Services in Broadband Convergence Networks
In this work, we propose an analytic framework for dimensioning the link capacity of broadband access networks which provide universal broadband access services to a diverse kind of customers such as patient and impatient customers. The proposed framework takes into account the flow-level quality of service (QoS) of a connection as well as the packet-level QoS, via which a simple and systematic provisioning and operation of the network are provided. To that purpose, we first discuss the necessity of flow-aware network dimensioning by reviewing the networking technologies of the current and future access network. Next, we propose an analytic model for dimensioning the link capacity for an access node of broadband convergence networks which takes into account both the flow and packet level QoS requirements. By carrying out extensive numerical experiment for the proposed model assuming typical parameters that represent real network environment, the validity of the proposed method is assessed.
5.17 Wireless communication and broadcasting convergence network throughput（INSPEC）
Wireless communication and broadcasting convergence networks provide a potential solution to greater traffic throughput in the future. In this paper, the throughput of a convergence network is analyzed based on the standardization project for specific requirements for local and metropolitan area networks in China, referred to as broadband wireless multimedia systems. The convergence network is modeled as a combination of a broadcasting channel and a multi-access channel with interference. The throughput is then given as a function of the time resource allocation by calculating the channel capacity with interference. The maximum throughput and the optimal time resource allocation are then determined for a given delay constraint and traffic requirements. The results give guidelines for time resource allocation and system design for convergence networks.
5.18 Odeling and clustering analysis of broadband convergence networks （INSPEC）
In contemporary telecommunication systems Markov processes are seldom observed, and the widely used Markovian models don’t represent precisely the real system. In order to omit the need of modeling the system with a Markov chain we apply different clustering approaches for obtaining the steady state probabilities, which are represented by the data clusters. Some widely used data clustering methods are applied for performance evaluation of different telecommunication networks. However, in order to accomplish our investigation, we conduct our research with Markovian models, so that we have a solid ground for comparison, although the benefits of applying clustering techniques lie in the domain of the non-Markovian processes..
5.19 Intelligent Network Functionalities In Wireless 4g Networks: Integration Scheme And Simulation Analysis
In future wireless and mobile environments it is likely that mobile stations will be able to choose between multiple access networks offering competing services. Wireless 4C network should offer a wide use of information processing techniques, efficient manipulation of the network resources, and reuse of network functions. It should also allow the insertion of supplementary capacities making it easy to add services. In this article, first we study the design of intelligent services in wireless fourth generation networks. Then, we propose several intelligent network functionalities to determine the best network to use efficiently. Finally, we study the effect of the intelligent functions on the network performance using simulation analysis.
5.20 An Optimum Multiple Metrics Gateway Selection Mechanism in MANET and Infrastructured Networks Integration
This paper proposes an optimum mechanism to select appropriate gateway based on multiple node metrics: remaining energy, mobility or speed, and number of hops, for interconnected Mobile Ad Hoc Network (MANET) with infrastructured network. To choose an optimum gateway node, we use the Multiple Criteria Decision Making (MCDM) method called Simple Additive Weighting (SAW) to outrank the optimum gateway node. SAW method calculates the weights of gateway node by considering these three metrics. Node with the highest weight will be selected as a gateway. Simulation results show that our scheme can improve throughput performance, gateway lifetime, and packet delivery ratio of MANET and infrastructured network.
5.21 Ad hoc on demand multipath distance vector routing (AOMDV) over a distributed TDMA MAC protocol for QoS support in wireless ad hoc networks: integration issues and performance evaluation
This paper focuses on the problem of QoS multi-path in wireless ad hoc networks. An integration of a novel multi-path routing protocol and a distributed time division multiple access (TDMA) MAC protocol is proposed. The MAC considered is called evolutionary TDMA (E-TDMA) and the analysed multi-path routing protocol is the ad hoc on demand multi-path distance vector (AOMDV) protocol. The integrated approach multi-path routing and TDMA MAC protocol offers advantages typical of multi-path routing, in terms of reduced route discovery frequency and increased throughput. The advantage of the E-TDMA MAC is a higher throughput in comparison with the standard IEEE 802.11 MAC and the reduction of the contention interference due to the slot reservation mechanism for high-data traffic. Two schemes to build the multi-route are exploited. The simulation results show the benefits of the integrated routing-MAC protocol in terms of reduced overhead, higher throughput and reduced end-to-end delay for a scenario with very high mobility and heavy data traffic.
