Cisco ASR 5000 Series, Обзор продукта

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GGSN Support in GPRS/UMTS Wireless Data Services
How GGSN Works ▀
Cisco ASR 5000 Series Product Overview ▄
OL-22938-02
The MS can now send and receive data to or from the PDN until the session is closed or times out. Note that
for Mobile IP, only one PDP context is supported for the MS.
13.
The FA periodically sends Proxy Mobile IP Registration Request Renewal messages to the HA. The HA sends
responses for each request.
14.
The MS can terminate the data session at any time. To terminate the session, the MS sends a Deactivate PDP
Context Request message that is received by the SGSN.
15.
The SGSN sends a Delete PDP Context Request message to the GGSN facilitating the data session. The message
includes the information elements necessary to identify the PDP context (i.e., TEID, and NSAPI).
16. The GGSN removes the PDP context from memory and the FA sends a Proxy Mobile IP Deregistration Request
message to the HA.
17. The GGSN returns a Delete PDP Context Response message to the SGSN.
18.
The HA replies to the FA with a Proxy Mobile IP Deregistration Request Response.
19.
The HA sends a RADIUS Accounting Stop request to the AAA server which the AAA server responds to.
20.
The SGSN returns a Deactivate PDP Context Accept message to the MS.
21.
The GGSN delivers the GGSN Charging Detail Records (G-CDRs) to a Charging Gateway (CG) using GTP
Prime (GTPP). Note that, though not shown in this example, the GGSN could optionally be configured to send
partial CDRs while the PDP context is active.
22.
For each accounting message received from the GGSN, the CG responds with an acknowledgement.
IPv6 Stateless Address Autoconfiguration Flows
The following figure and the text that follows describe a sample IPv6 stateless address auto configuration session setup
call flow in which the MS receives its IP address from the RADIUS DHCP server.