CALCULATIONOF THE PARAMETERS OF UTN WITH CHANNEL SWITCHING IN THE STAGE OF NEXT GENERATION NETWORK IMPLEMENTATION
MINISTRY OF EDUCATION AND SCIENCE OF UKRAINE
ODESSA NATIONAL O.S.POPOV ACADEMY OF TELECOMMUNICATIONS
Switching systems department
COURSE PROJECT
for: Switching systems of information distribution
on theme: Telecommunication network design
Student 4 course ICC TE 4.1.01 group
Korovkina K. V.
(name, surname)
National scale
Quantity points: Mark: ECTS
Odesa 2016
CONTENTS
INTRODUCTION.. 3
TASK.. 4
1 Analysis of existing analogue to digital circuit switching network. 6
2 Calculation of loads for UTN with time switching. 9
2.1 Planning the subscriber groups. 9
2.2 Planning subscriber traffic intensity. 10
2.3 Calculation of the q-coefficients. 13
2.4 Calculation of traffic intensities at the out of SM.. 15
2.5 Calculation of traffic intensities for analogue PE. 17
2.6 Interstation distribution load on UTN. The gravitational coefficients. 18
3 TRUNKS AND AMOUNT OF E1 TRUNKS REQUIRED TO HANDLE THE LOADS FOR HTE-31/32. 21
4 BLOCK DIAGRAM OF PROJECTED NGN NETWORK FOR UTN.. 24
5 FUNCTIONAL SCHEME OF DESIGNED PSS SI-3000. 27
CONCLUSIONS. 29
LIST OF LITERATURE. 30
INTRODUCTION
DSS – is single territory distributed complex of software and hardware equipment, that consists of support equipment, remote switching modules, remote subscriber modules.
Support equipment performs digital switching control of calls and centralizes function of technical operation and system servicing.
Remote switching modules – are the autonomic part of DSS equipment, that can perform its functions independently on the network like separate station and only in technical operation and controlling procedures depends from SE.
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Remote subscriber modules – are remote from SE or RSwM part of system equipment, that is fully controlled from SE or RSwM and acts like switching of subscriber lines.
RSwM and RSuM switch into switching module SE by the digital switching lines DSL.
DSL – are nternal switching lines, in which the bitrate = 2048 kbit/s, cycle structure 32 channel intervals, each of them with bitrate = 64 kbit/s. (E1 trunks).
DSS “Kvant – E” – is narrowband DSS that have module construction, territory distributed switching, decentralized software control and abilities of centralized technical servicing.
Has only one subscriber access subsystem, and control switching system on the base of switching field with channel switching.
SI2000 - digital switching system. Automatic telephone exchange production ISKRATEL. Extremely flexible and compatible EWSD when compared with other modern EWSDsuperior to all existing TDM switching systems in switching old EWSD integration with modern signaling protocols.
There are several versions: the second version, the fourth version, 5th and 6th version and the version that was later presented to the market as a product name SI3000 networks to NGN. In most of the work takes EWSD products 5 version.
TASK
CALCULATIONOF THE PARAMETERS OF UTN WITH CHANNEL SWITCHING IN THE STAGE OF NEXT GENERATION NETWORK IMPLEMENTATION
TASK FACTORS
Urban Telephone Network (UTN) with 6-digit numbering plan is made up of 3 nodal areas (NA).
Digital Nodal Area (DNA-3) is based on Kvant-E digital switching system including HTE-31/32 that supports NHTE-31/32 subscribers, two Remote Switching Modules (NRSwM-1 and NRSwM-2 subscribers supported) and three Remote Subscriber Modules supporting NRSubM-1, NRSubM-2, NRSubM-3 subscribers.
Analogue-digital Nodal Area (ADNA-4) is based on SI-2000/v.5 digital switching system that includesHTE-41/42and supports NHTE-41/42 subscribers and two SANs (NSAN-1 and NSAN-2 subscribers supported) that provide network access for two analogue PEs of ATSK-U type (one analogue PE per each SAN). PE-45 supports N45 subscribers while PE-47 supports N47 subscribers.
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DNA-5 is based on SI-2000/v.5 digital switching system including HTE-51/52 that supports NHTE-51/52 subscribers.
A Toll Exchange provides the planned telephone network with toll communications. The TX contains SSP (numbering plan 0-800-xxxxxx, 0-900-xxxxxx) and Softswitch class 4.
Coefficients KNA-3, KNA-4, KNA-5 denote shares (expressed in %) of private phones within every nodal area. A share of payphones equals 0.01 of TX’s subscriber capacity. A share of subscribers with access to SSP is 0.01. Initial data are given at table 1.
In UTN a Call-center (Special Services Center) works, implemented in SI-2000/v.5 equipment which provides access to emergency (1-xx), ordering (17-xx) and reference information services (15-xx).
In considered planned UTN first step of Next generation network (NGN) development. This stage assume installation in HTE-51/52 equipment of Packet Switching System (PSS) based on SI-3000. Designed PSS SI-3000 consists of media equipment, signaling gateway and call server CS with Softswitch class 5 functions. For designed network is supposed to organizea multiservice network for NmcipBAN new subscribers, that can be connected with analogue (ASL) and high-speed digital lines ADSL-2+ (their share is KADSL2+)that connected to nodes ipBAN, that are placed in the network (exact positionis choosed by yourself). For existing subscribers of HTE-51/52is assumed providing of multiservice access for NmcBAN subscribers with ADSL lines by mean of installation with HTE-51/52 required quantity of multiservice access nodes AN-BB BAN with capacity 240 ADSL.
TASKS
1. Draw and analyze diagram of the existing UTN. Develop and shortly describe scheme of existing network in which show TX and Call-center. Show all necessary public exchanges and sign code, type of equipment and numbering of subscriber lines. Show types and directions of trunks.
2. Calculate loads for UTN with time switching. Determine shares of subscriber groups. Calculate subscriber loads and loads within TXs. Calculate values of the load created by outgoing calls, including loads towards Call-center and SSP. Set the necessary attraction coefficients for the TEs. Calculate load values between telephone exchanges of the net.
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