Calculate loads for trunks and amount of E1 trunks that is required to handle the loads for THE-31/32.
4. Design block diagram of projected NGN network for UTN. For the block diagram designed in the p. 1 show projected packet switching system based on equipment SI3000: call server, media gateway, signaling gateway, application server, equipment of BAN, ipBAN included in PSS. Show the interaction of designed PSS with existing UTN.
5. Design functional scheme of designed PSS SI-3000. At functional scheme show: existed equipment of THE-51/52, all directions of connection, equipment of PSS SI-3000, including of ipBAN and BAN. Shortly describe equipment choice.
TASK TABLE
| А | 5 | В | 2 | С | 7 |
| NHTE-31/32 thsnd. | 15 | N45, thsnd. | 6 | N47, thsnd. | 4 |
| NHTE-41/42, thsnd. | 19 | NHTE-51/52, thsnd. | 16 | NRSwM-2 | 4096 |
| NRSwM-1 | 3072 | NRSubM-1 | 224 | NRSubM-3 | 128 |
| КNA-3 | 0,80 | NRSubM-2 | 256 | KNA-5 | 0,80 |
| NSAN-1 | 1 408 | NSAN-2 | 2 800 | NmcBAN, thsnd. | 960 |
| KNA-4 | 0,65 | KADSL2+ | 0,75 | ||
| NmcipBAN | 1200 |
1 Analysis of existing analogue to digital circuit switching network
In the considered UTNthe overlay method was used for introducing the digital equipment. Consider the main activities that are carried out using this method.
Overlay method is characterized by the presence of two independent single (analog and digital) networks, serving the same territory. Digital overlay network is formed by: the installation of new Digital Switching Systems (DSS), the dismantling of obsolete equipment and replacing it with digital, by expanding existing analog ATXwith digital equipment.
Introduction of DSSby an "overlay network" method is carried out by a single geographically dispersed set of hardware and software for one or more nodal areas of the UTN, and the binding factor is usage of the same type of equipment for UTN transportation system.
In this case, the following recommendations are used.
Host Transit Equipment (HTE, Host).DSS is used primarily as HTEwith the functions of association and distribution of raw and input local and long-distance connections for all or only part of the stations on the basis of remote switching modules (RSwM) and possibly DSS ofthe other systems, and as well as the Operation and Maintenance Center (OMC) for all territorially distributed system of equipment. In addition, depending on the requirements (including simultaneously), this HTE can serve as intelligence node (NCT) or intelligent call center (Callcenter); Mobile Switching Center (MSC); TX or International Switching Center (ISC); point of presence
|
|
|
IPOP Internet (Internet Point Presence) and gateway to IP packet networks, ATM, FR, Ethernet; point of switching intelligent services SSP (Service Switching Point). Remote switching module (RSwM). The feasibility of establishing a RSwM depends on the conformity of its features, which are determined by the type of the selected DSS, to the specific needs of the designed object in the network functions, subscriber capacity and the number of connecting lines (CL).
The Remote Subscriber Modules (RSuM) are used to reduce the subscriber line network costs (SL), in particular as hubs in places where small groups of subscribers - in the districts of private buildings.
For implemented DSS the necessary range of linear joints, methods and code signal exchange with existing analogue equipment and facilities existing in the DSS network should be provided. With the analog part of network the DCLis used only. The connection between the DSS is made usually with usage of fiber optic ring formed with SDH.
The new numbering plan, which involves the allocation of it as a digital single node area, with a capacity of about 100 000 subscribers is usually introduced to the implemented DSS.
Introduced DSS should provide functional completeness of the common channel signaling CCS-7 and have the status of a transit STP (SignalingTransfer Point) or terminal SP (Signaling Point) signaling point for the signaling interaction with existing DSS and TX.
In regards to the resources of centralized maintenance, integrated DSS will provide an opportunity of interaction with Telecommunication Management Network (TMN).
In order to provide customers of UTNwith a connection to the Internet network on commutated access (dial-up), at the HTEis organized an IPOP (Internet Point of Presence), that will through establishment of a multi-functional group of Internet servers provide an access to the world internet network. The server allocates the required number capacity and bandwidth to the Internet network in a digitalized and semi-permanently commutated direction of the connection (in the commutated field of DSS) to the HTE and, depending on the load – the serial number of subscriber numbers with modems for the user access.
|
|
|
By theTXis organized an assembly of the Service Switching Point (SSP).
To perform the necessary 1 part, it is required to depict a block diagram of the UTN .The block diagram shows anarrangement of the communication between TX and CSS:Network station type and code (numbering of SL can be omitted); CL bundles local communication; shows theTXwith an indication of the type of equipment, shows connection beams SSP and SSC to all focal areas ;for SSPit shows - the location and bundles of CL from all network stations with an indication of conductivity;by theTXis shown the Switching Services Point (SSP).
Analogue-Digital UTN nodulation (network with six-figure numbering) requires a network of nodal areas (NA), which are organized with the purpose of enlarging the CL beams. Considered UTN is based on analog and digital nodal areas.
Figure 1 – Structure scheme of existing network
2 Calculation of loads for UTN with time switching
It is necessary to plan traffic intensities in order to determine the necessary amount of telecommunication equipment resources to handle this traffic.
This process will have several steps:
Дата добавления: 2018-06-27; просмотров: 171; Мы поможем в написании вашей работы! |
Мы поможем в написании ваших работ!