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GPRS : General Packet Radio System - page 19 / 20

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Networks: L17

19

Handover to GSM

limited initial 3G coverage requires interoperability with GSM

need to swap to GSM when moving out of WCDMA cell range

»

though same quality of service not possible e.g. fast data rates

a positive effect on capacity through load sharing when possible

handset has to identify which is the best GSM cell to swap to

Inter-frequency handover

in high capacity areas where multiple 5MHz carriers are deployed

some users may need to be swapped to a lower-loaded band

Channel type switching

common channels and dedicated channels

depending on the amount of data the user needs to transmit

a dedicated channel when large amount of data e.g. voice, web page

common channel for control information

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