Manual

Cisco Packet Data Serving Node (PDSN) Release 2.0

System Overview

12.3(11)T

Figure 5 CDMA Network —Mobile IP Scenario

The communication process occurs in the following order:

1. The mobile station registers with its Home Agent (HA) through an FA; in this case, the Cisco PDSN.

2. The HA accepts the registration, assigns an IP address to the mobile station, and creates a tunnel to

the FA. This results in a PPP link between the mobile station and the FA (or PDSN), and an IP-in-IP

or Generic Routing Encapsulation (GRE) tunnel between the FA and the HA.

As part of the registration process, the HA creates a binding table entry to associate the mobile

station’s home address with its Care-of address.

Note While away from home, the mobile station is associated with a care-of address. This address

identifies the mobile station’s current, topological point of attachment to the Internet, and is

used to route packets to the mobile station. In IS-835-B networks, the foreign agent’s

address is always used as the Care-of address.

3. The HA advertises that the network is reachable to the mobile station, and tunnels datagrams to the

mobile station at its current location.

4. The mobile station sends packets with its home address as the source IP address.

42690

Home Access

Provider Network

Home IP Network

Broker Network

HLR

RADIUS

Home IP Network,

Private Network,

Home Access

Provider Network

RAN

Visited Access

Provider Network

R-P

Interface

Visitor

Location

(VLR)

SS7

network

RADIUS

PDSN

obile station