【资料名称】：SGSN_Gr

【资料作者】：ericsson

【资料日期】：2010-03-09

【资料语言】：中文

【资料格式】：PDF

【资料目录和简介】：

Gr Protocol Stack

Gr interface is the connection between SGSN and HLR.
SGSN can connect to HLR directly or indirectly through STP (HSTP or LSTP).
The SCCP, TCAP and MAP layer are bearer independent, while the other layers
are bearer dependent.
Currently, in most of the live network, Gr protocol stack is established on
narrowband SS7 Bearer, whose physical layer is E1/T1.
Of course, the Gr protocol stack also can be established on broadband SS7 bearer
(ATM) or SS7-over-IP (M3UA/SCTP/IP/Ethernet).