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Maystrenko Alexandr

Faculty of computer information technologies and automatics

Department of automatics and telecommunication

Speciality Telecommunication systems and networks

Development and research TCS using NGN technology

Scientific adviser: Ph.D., docent Yaremko Igor

Resume Abstract

Abstract

Content

• Introduction
• 1. Theme urgency
• 2. Goals and objectives of the research
• 3. Problem solving
• Conclusion
• References

Introduction

Today the market of information and communication services to customers need a wide class of different services and applications involving a wide variety of protocols , technologies and data transmission speeds . The user preferably selected service provider based on price and product reliability.

In the current market situation overwhelmed by information and communication service providers : they are filled with numerous clients interfaces , network layers and too controlled a large number of control systems. Moreover, each service seeks to create its own network , causing operating costs for each service that is not conducive to the overall success and leads to the creation of a complex network of thin layers and low

1. Theme urgency

Building a high-speed multiservice network with the provision of a set of relevant modern standards of service quality requires the use of the equipment which supports bandwidth and quality features that are not yet widely used and confidently , at least today. The project of this type is relevant and appropriate, particularly in the new high-rise buildings, where there is no old networks and implementing DSL technology is not feasible .

2. Goals and objectives of the research

To the problem of building projects multiservice networks is providing the potential customers of such services , which are interesting for them today and for a certain period in advance and utility is for them to use these services. On the other hand return object design determines what is possible or even building a network that option when it makes sense.

The big problem with most access networks is the inability of other services, but access to the Internet, because the technology to build these networks do not support the required quality of service for real-time parameters of QoS. It also makes the network design problem based on the use of FOC and modern technology FTTx- date.

The aim is achieving certain social and economic impact. Social effect is to provide subscribers with services that satisfy their needs , leading to improved living and working conditions . Scope - private subscribers housing types in high density placement. The network can be used to transmit information of any type that provides fiber , which gives the following link, which will work and will be beneficial for years to come . An important characteristic of the network also support easy transition to new technologies in the future.

3. Problem solving ;

In today's broadband networks, selecting the most appropriate model of service delivery tend to have far-reaching and largely determines the amount of capital and operating costs of the operator on the development of the network, as well as, consequently, its further exploitation. There are two main ways : the service VLAN (S-VLAN) and client VLAN (C-VLAN). The model S-VLAN is a separate VLAN for each of the services: Internet access , IP- Telephony (VoIP), IP- TV (IPTV) and video on demand (VoD). IGMP protocol packets to control traffic subscription multicast (multicast), are always transmitted in the same S-VLAN, as the associated traffic IPTV.

Benefits:

Good for simple implementations of Triple Play services.

Each ONT, installed in the customer's home and connected to the optical lines - has an identical configuration.

Disadvantages:

On the side of customers, each service is connected to a port and associated with a particular service device. For this example, there are problems with the provision of IPTV services to view the broadcast video channels on PC.

Overly complicated implementation mechanism for dynamic control of bandwidth available for activation (Call Admission Control, CAS ). Due to the high computational load on the device ( which is associated with the processing of data packets for each service VLAN and the definition of total traffic for each subscriber ) implementation mechanism is not possible at the level of individual device access or BNG (Broadband Network Gateway).

disadvantage, given the growing popularity of the format HD. In the model of customer C-VLAN used by an individual VLAN for each subscriber. This model is the basis of network architecture in many systems, carrier-grade data for aggregation connections via leased lines , Metro Ethernet, Frame / ATM, PON. This arrangement of the network used by many major providers of broadband services .

Benefits:

Model C-VLAN allows the border router to manage bandwidth for each subscriber individually , and enables easy implementation mechanism SAS .

The model is well suited to provide services to Multi-Play, where any terminal device in the home network subscribers (PC / Notebook, IP-phone, STB, MP3- player, game console , etc.) can connect to any services.

Disadvantages:

In the simplest configuration, Ethernet- frames transmitted through the access device in a transparent manner . As a result, each RG must be configured individually for your C-VLAN.

The use of model C-VLAN pure ill-suited to distribute multicast traffic . In this case, the replication flow is at BSR, which requires a wider bandwidth for connection BSR (Broadband Service Router) and MSAN (Multiservice Access Node).

Because of the population density is appropriate to use architecture C-VLAN.

The most significant advantages of PON are:

Save fiber optic cable in the area of optical splitters to the central PBX or point of presence.

Save ports on the PBX or central point of presence where aggregation is performed .

Apply the analog video signal.

Ability to provide Triple Play services to the provision of video on any model : kabelnohotelebachennya as a service or as IPTV services

Reliability . Using fewer active elements in the network ensures its reliability, and in addition, contributes both to reduce sensitivity to the effects of adjacent lines, and reduce the impact on them.

In terms of this project , these benefits are more important than the disadvantages of passive networks : high operating speed of data transmission , the need for data encryption, and reliability is lower than Ethernet P2P due to the fact that multiple users using the same channel.

In our day to build PON- system operator may use equipment that is based on two groups of standards. GPON systems based on Recommendation ITU-T series G.984. The second group of solutions (GEPON) is based on the standards IEEE 802.3ah. Equipment GPON or GEPON has important technical differences , especially in terms of the operator. But consumers will find more similarities . For example , to distinguish terminal equipment GPON or GEPON is not possible. They have shared the same set of interfaces and functions , enabling the user to connect to the same port terminal equipment using the same connectors. According to experts, the Ukrainian market , technology GPON, based on standards ITU-T, provides better bandwidth usage of optical communication channel and ensures quality of service (QoS), which is important for transmitting video . Since GPON transport protocol based on Ethernet, it is unpredictable length packets may be a significant factor that reduces the quality of service, latency- critical . In order that subscribers have access to all services and service quality are required backbone network , which must maintain a certain level parameters of QoS.

The main criteria when choosing a solution for building the core network is performance, fault tolerance and supporting QoS. With the development of multimedia -intensive services such as IPTV and VoD, trunk segment operator infrastructure increasingly resembles the backbone , which fits network traffic. Therefore, the capacity of highways is a key characteristic that determines the choice of equipment.

A typical PON-network consists of:

Central station device OLT, which serves to aggregate flows;

Distributive optical network ODN (Optical Distribution Network), which consists of:

Backbone optical feeder (fiber);

Splitters, branching optical signal to the optical branches of trees;

End users of cable outlet (Drop-endings), which, depending on the type of end-user's device and the number of stages in the network splitters can be an optical fiber cables Ethernet, xDSL, E1;

End users of devices ONU or ONT, which, depending on the type installed in the distribution cabinet, in a building on the premises of the subscriber and provide end user access to different ports depending on the type and model of the device: Ethernet, sometimes VDSL - the main type of port, in addition - cable TV, phone, E1;

Network Management System AMS (Access Management System), which is used to control and monitor equipment PON.

In order to provide telecommunications services to the subscriber uses a technology WDM (Wavelength Division Multiplexing), when signals to the subscriber and the subscriber's transmitted at different wavelengths (1490nm and 1310nm respectively). For some types of ONU / ONT, with private access to TV video signal may "mix" in Optical Fiber cable TV signal on a separate wavelength of 1550 nm. Direct the flow level optical signals are broadcast. Each ONT, reading address fields, highlights of this total flow assigned to him only piece of information.