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I found this URL about EDGE. Though it would be useful to you.

http://www.tml.tkk.fi/Opinnot/T-109.551/2003/kalvot/Positioning_EDGE.ppt#304,1,POSITIONING EDGE IN THE MOBILE NETWORK EVOLUTION

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Posted by hudson

Lingam,

Here are some difference in GPRS. Please see this help. Thanks SKK

In the Base Station Controller (BSC), there are separate territories for the GPRS and EGPRS. In other words, the GPRS traffic primarily uses non-EDGE transceiver (TRX) and the EGPRS traffic uses EDGE transceiver (TRX). In a GPRS load situation or when a GPRS territory does not exist, it is possible that the GPRS traffic (GPRS Temporary Block Flows - TBF) uses a EGPRS capacity from the EGPRS territory.

When a GPRS Temporary Block Flow (TBF) takes place via GPRS territory (via a non-EDGE TRX), the CS-2 coding scheme needs only 16 kbit/s from the Abis interface resources, in this example. Therefore, one sub-timeslot from the fixed "pool" of Abis resources (i.e. a 16 kbps channel) is used.

When a GPRS Temporary Block Flow (TBF) takes place via EGPRS territory (via an EDGE TRX), the CS-2 coding scheme needs a 16 kbit/s master Abis channel and one 16 kbit/s slave channel from the EDAP. This is because the EDGE transceiver (TRX) uses different transcoder formats, rate adapter unit (TRAU) formats, and synchronization schemes. This means that master Abis channels and EDAP resources are only used by the EGPRS territory. The EDAP is not used by the GPRS territory.

That is, each EGPRS radio timeslot takes one master sub-timeslot from the fixed "pool" and four slave sub-timeslots (= one timeslot) from the EDAP.

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Posted by karthi