3848093891

J

pp rru^rpL

GPRS Architecture

•New nodes: SGSN and GGSN

•New interfaces: Gb (BSC), Gs (MSC), Gr(HLR)

•New radio channels

•Packet switching modę

•Signalling piane for data transmission

•Different radio channel mapping

II

SEIWfPOL

SGSN - Serving GPRS Support Node

•Forwards incoming/outgoing IP packets to MS

•Provides IP packet routing to PDN destination

•Ciphering and authentication

•Data session management

•Logical link management to MS

•Mobility management

•Connection to HLR, MSC, BSC, GGSN

•Output of billing data

•Geographical SGSN service area