By Emmanuel Seurre;Patrick Savelli;Pierre-Jean Pietri

This publication is helping you know the way the GPRS procedure is used as a huge expertise construction block for the rising cellular web; the ebook additionally will give you unique insurance of quite a lot of very important themes.

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HTML & Web Design Tips & Techniques

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It was indeed chosen by the operators and manufacturers involved in the system design to provide high-data-rate packet-switched services with minimized impacts on the GSM standard. 1. The details related to the physical layer are presented in Chapter 4. One of the main GPRS characteristics is that a physical connection is established in uplink only when the MS needs to send continuous data to the network, and in downlink only when the network needs to send continuous data to the MS. This physical connection is released in one direction as soon as the sending entity Chapter 3: Overview of GPRS 39 40 Chapter 3: Overview of GPRS has no more data to send.

1 lists the new interfaces with SS7 network. 1: New Interfaces with the SS7 Network Interface Name Gr Gc Gf Gd Gs Localization SGSN-HLR GGSN-HLR SGSN-EIR SGSN-SMS GMSC or SGSN-SMS IWMSC SGSN-MSC/VLR Mandatory/Optional Mandatory Optional Optional Optional Optional Gr Interface The Gr interface is defined between the SGSN and HLR. It allows the SGSN to retrieve or update GPRS subscription and GPRS location information in the HLR during location-management or authentication procedures. The MAP protocol has been modified to take into account this interface.

The subnetwork formed by the SGSNs and the GGSNs is called the GPRS core network. In order to reuse the GSM nodes, new interfaces have been defined between the GSM network nodes and the different elements of the GPRS core network. 1. The protocol layer has been split into two planes. On one side there is the transmission plane, which is mainly used for the transfer of user data. The signaling plane is used for the control and support of the transmission plane functions. 2 deals with the transmission and signaling planes.

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