| GPRS
Alternatives |
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| n | GPRS
functional architecture |
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| – | GSM
transmission must deal with two semi-independent aspects so is |
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| divided
into two functional entities |
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| • | GPRS
radio resource allocation deals with efficient usage of radio |
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| interface
channels |
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| • | GPRS
packet transport mechanism deals with efficient packet |
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| routing
through GSM infrastructure to the interworking function |
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| (IWF2)
with the external Packet Data Network (PDN) |
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| • | two
functions are connected by another interworking function |
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| (IWF1) |
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