既有 GSM 系統增加 GPRS 功能所需的修改:
既有 GSM 系統增加 GPRS 功能所需的修改:
1.Core Network adds SGSN, GGSN
2.BS adds PCU
3.Upgrade software
SGSN -- software GPRS support node
GGSN -- gateway GPRS support node
PCU -- packet control unit
1.Core Network adds SGSN, GGSN
2.BS adds PCU
3.Upgrade software
SGSN -- software GPRS support node
GGSN -- gateway GPRS support node
PCU -- packet control unit
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