Calculation in the NGN Networks of Indexes of Reliability of Tracts of Transmission of Packet Information

Abstract

Abstract:The article describes the main elements that make up the transport network NGN. Shows the relevance of research of reliability of the NGN network, as well as the need of numerical calculation of complex indexes of reliability of tracts of transmission of packet information is given. On the developed imitating model of the NGN network indexes of reliability of tracts of transmission of packet information are calculated when using mechanisms of reservation, and also at their absence. Numerical calculation of the main indexes of reliability (failure rate λ, average time of restoration of communications of Т в , average time of a time between failures Т о , К г the coefficient of availability, probability P(t) of no-failure operation in the range of t, coefficient of operational readiness R г ) the NGN network equipment (router, switch) for the main period of operation is given. By the received results conclusions are makes. Keywords: network of the following generations, transport network, public communication network, softswitch, reliability of the NGN network, complex indexes of reliability, the reservation mechanism, tract of transmission of packet information, fault in the equipment of NGN network. IntroductionThe basis of NGN (Next Generation Network) is made by a universal transport network with switching of the packets, realizing functions of transport level and level of management of switching and transmission.A part of the transport NGN network can be: the transit nodes which are carrying out functions of transmission and switching; the terminal (boundary) nodes providing access of subscribers to a multiservice network; the controllers of the alarm system which are carrying out functions of information processing of the alarm system, management of calls and connections; the locks, allowing to carry out connection of traditional communication networks (PSTN -public switching telecommunication network, NDT -network of data transmission, CNMS-communication network of mobile stations). Controllers of the alarm system can be taken out in the separate devices intended for service of several nodes of switching. Terminal and transit nodes of a transport network can carry out functions of nodes of services, i.e. the structure of functions of boundary nodes can be expanded thanks to addition of functions of service. For building of such nodes is used the technology of flexible switching (Softswitch). (Goldshteyn et al., 2011).

Results of simulation modeling of technical parameters of a multiservice network

“…The authors substantiate the expediency of determining the technical parameters of an info-communication network based on a systematic approach, taking into account the reliability of each network level. The scientific novelty of this work lies in the fact that using the previous works of the author, it is proposed to solve the problem of studying the technical parameters of multiservice communication networks using system analysis and using the Matlab software environment [1]- [3].…”

Algorithm of optimal technology selection of broadband access network

“…Designing methods of broadband access networks are widely studied in literature [1,[6][7][8][9][10][11][12][13][14][15][16]. There are special algorithms and techniques that allow optimize and automate the designing process of the access network based on copper cables at the planning stage during network modernization.…”