Communicating Systems & Networks: Traffic & Performance by Kenneth D. Kok

By Kenneth D. Kok

Techniques that make sure site visitors functionality in telecommunication platforms and a strategy that may be utilized to all stages of improvement are offered during this advent to telecommunication networks.

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Additional resources for Communicating Systems & Networks: Traffic & Performance

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Care must therefore be taken, in the Telecommunication Networks and Traffic 37 event of a large proportion of local traffic, to evaluate correctly the number of calls generated by subscribers. In other words, for the same subscriber traffic value in erlangs, the number of calls to be processed at node level will be lower the greater the proportion of local traffic. Network switched traffic: TD + TA + TT = 77 + TO - TT, which correspond to the same characteristics as at subscriber level. Note in particular that a pure toll exchange has to handle only half the total of the incoming traffic and outgoing traffic.

In the UMTS network, the whole network evolves. A distinction is drawn between the radio part, RNS (radio network subsystem) and the core network part, CN (core network). The RNSs form the access network. They include as before radio resources, but with higher bit rates in this case, and the RNC. e. UMTS terrestrial radio access network, for the general public network) consists of radio resources as before (but with a higher bit rate, the BTS becomes Node B), and of the RNC (radio network controller) which controls all the B Nodes of the UTRAN.

G. 64 kbit/s). This means that it is easy to evaluate the resources used: in this case, as many 64 kbit/s channels as are indicated by applying the Erlang formula. The same voice service in a packet network will make it necessary to distinguish between coding with or without silence suppression, and thus between packet flows (of fixed length) at variable bit rate (and thus with an inter-arrival time that is to be defined) or at constant bit rate. If furthermore we consider e-mail type services, or more generally webassociated services, we will not only find flows of variable bit rates but also packets and flows of packets with highly variable lengths, with laws (packet length, flow arrival times) to be defined.

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