Asymmetric digital subscriber line technology and the future of remote access networking

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Implications of Implementing HDTV Over Digital Subscriber Line Networks

This thesis addresses the different challenges a telecommunications company would face when trying to implement an HDTV video service over a Digital Subscriber Line (DSL) connection. Each challenge is discussed in detail and a technology, protocol, or method is suggested to overcome that particular challenge. One of the biggest challenges is creating a network architecture that can provide enough bandwidth to support video over a network that was originally designed for voice traffic. The majority of the network connections to a customer premises in a telephony network consists of a copper pair. This type of connection is not optimal for high bandwidth services. This limitation can be overcome using Gigabit Ethernet (GE) over fiber in the core part of the network and VDSL2 in the access part of the network. For the purposes of this document, the core portion of the network is considered to be an area equal to several counties or approximately 50 miles in radius. The core network starts at the primary central office (CO) and spreads out to central offices in suburbs and small towns. The primary central office is a central point in the telecom operator\u27s network. Large trunks are propagated from the primary central office to smaller central offices making up the core network. The access portion of the network is considered to be an area within a suburb or small town from the central office to a subscriber\u27s home. Appendix A, located on page 60, contains a network diagram illustrating the scope of each of the different portions of the network. Considerations must also be given for the internal network to the residence such as category 5 (Cat5) cable or higher grade and network equipment that can provide up to 30 Megabits per second (Mbps) connections or throughput. The equipment in the telecommunications network also plays a part in meeting the challenge of 30 Mbps bandwidth. GE switches should be used with single mode fiber optic cable in the core part of the network. Digital Subscriber Line Access Multiplexers (DSLAM) with the capability to filter Internet Group Management Protocol (IGMP) messages should be used in the access part of the network to facilitate bandwidth utilization. Placement of this equipment and how the data is aggregated is another issue to consider when implementing HDTV service. Another major challenge facing the implementation of HDTV over DSL networks is controlling quality of service (QoS) throughout the network. Class of Service (CoS) and Differentiated Services (DiffServ) is a method of QoS that would enable video packets to have a higher priority and less delay than other data packets. The consumer could have data, video, and voice traffic all over the same DSL connection. Data, video and voice packets would need to have a different priority in order to maintain appropriate QoS levels for each service. The use of advanced technology in video encoding will be essential to the success of the video service. MPEG-2, MPEG-4, and Windows Media 9 are just a few of the video encoding technologies that could be used to reduce the necessary bandwidth for HDTV. The advancement of this technology is essential to allow telecommunications providers to offer HDTV. Another challenge for the telecom operator concerns the security of the network and service after implementation. Theft of service will be another area that the telecomm operator will be forced to resolve. The cable operators currently face this issue and lose millions of dollars in revenue. Authentication, IP filtering and MAC address blocking are a few possible solutions to this problem

IPTV deployment - Trigger for advanced network services!

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Statistical Analysis of VoDSL Technology for the Efficiency of Listening Quality of 640k/640k

Next-generation Internet technology will offer high performance and high capacity traffic aggregation and scalability. Voice over Digital Subscriber Line (VoDSL) technology allows service providers to offer multiple telephone lines over a single subscriber line in addition to high speed data transmission services. This article provides a baseline test for the Listening Quality (LQ) using VoDSL access technology by using Voice/Listening Quality (V/LQ) transmission with voice compression while countinously downloading files. The result will be to enable the efficiency of the LQ and its statistical analysis based on a Digital Subscriber Line (DSL) service at level 640K/640K for each American National Standards Institute (ANSI) and Carrier Serving Area (CSA) loops

Design and Optimization of FTTH Architecture

Recently, the growth of Internet and uses of digital contents have significantly increased the demand for high-speed access network. Similar cases are also seen for the use of intranet and extranet services. The limitation of current access network such as the asymmetric digital subscriber line (ADSL) in terms of low bit rate and short of coverage span resulted in the exploration on fibre access scenario. Fibre-tothe- home (FTTH) brings the broadband access network capabilities directly to the customer premises with high splitting ratio and wide fibre span. It is seen as the linchpin technology to enable the future applications such as voice, video and data run, satisfying the ever-increasing need for bandwidth. This thesis shows the study of FTTH access network based on passive optical network (PON). The two types of FTTH; A-PON and Super-PON have been studied thoroughly to optimize their architecture to help network engineers in designing the system. The cost analysis is also carried out. The simulation is done using OptSim 3.0 and the result is verified with the experiment in the laboratory. It is found that the optimum configuration of a A-PON FTTH access systems with the bit rate of 2Gb/s with the use of 32 branching number is at the distance of 20 km. The power enhancement offered by Erbium-doped Fibre Amplifier (EDFA) provides for large distribution branches (thus the subscribers) and the length of fibre span can be extended up to 100 km

Service Platform for Converged Interactive Broadband Broadcast and Cellular Wireless

A converged broadcast and telecommunication service platform is presented that is able to create, deliver, and manage interactive, multimedia content and services for consumption on three different terminal types. The motivations of service providers for designing converged interactive multimedia services, which are crafted for their individual requirements, are investigated. The overall design of the system is presented with particular emphasis placed on the operational features of each of the sub-systems, the flows of media and metadata through the sub-systems and the formats and protocols required for inter-communication between them. The key features of tools required for creating converged interactive multimedia content for a range of different end-user terminal types are examined. Finally possible enhancements to this system are discussed. This study is of particular interest to those organizations currently conducting trials and commercial launches of DVB-H services because it provides them with an insight of the various additional functions required in the service provisioning platforms to provide fully interactive services to a range of different mobile terminal types