Mobile Networks Architecture by Andr? Perez

By Andr? Perez

This booklet explains the evolutions of structure for mobiles and summarizes the several technologies:
– 2G: the GSM (Global approach for cellular) community, the GPRS (General Packet Radio carrier) community and the sting (Enhanced information for international Evolution) evolution;
– 3G: the UMTS (Universal cellular Telecommunications approach) community and the HSPA (High pace Packet entry) evolutions:
- HSDPA (High velocity Downlink Packet Access),
- HSUPA (High velocity Uplink Packet Access),
- HSPA+;
– 4G: the EPS (Evolved Packet approach) network.
the phone provider and information transmission are the 2 major providers supplied via those networks. The evolutions are essentially dictated via the rise within the price of information transmission around the radio interface among the community and mobiles.
This booklet is meant as a quite simply comprehensible help to assist scholars and execs wishing to fast collect the most strategies of networks for mobiles comprehend the applied sciences deployed.

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32). 32). The outbound communication stays under the control of the original MSC. 32). 1 explains the data transmission service provided by the GPRS (General Packet Radio Service) mobile network. This service is implemented in PS (Packet Service) mode, which has a resource shared by a set of flows reserved for it. 2 kbps is obtained by carrying out a concatenation of the radio channel’s eight slots. 2 explains the architecture of the GPRS mobile network, which consists of two sub-systems. The BSS (Base Station Sub-system) access network defined within the GSM network is evolving with regard to the method for allocating the radio resource to the mobile.

All data exchanged between the MS and the MSC/VLR will be encrypted at the level of the link between the BTS and the MS. When the mobile changes cells during a communication, the security information is sent from the previous BTS to the new one across the network in order to allow the communication to continue in encrypted mode. 24. 3. 1. Principles A mobile that is switched on must be able to receive and transmit calls. It must select a cell and permanently monitor the beacon channels of neighboring cells to 42 Mobile Networks Architecture detect an eventual change of cell.

6 kbps thanks to a new type of modulation, for which a new channel coding scheme (CS) is defined. 1. Services The GSM (Global System for Mobile) network is used to implement a data transmission service in circuit mode. This mode monopolizes a radio channel, whatever the activity of the terminal may be. 4 kbps. The logical channel used is the TCH (Traffic CHannel). The HSCSD (High Speed Circuit Switched Data) service is a data transmission service in circuit mode that allows a single user to occupy up to four logical TCHs of a radio carrier.

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