Research on the configuration process of User IP in 3G mobile communication network (China Telecom CDMA2000)

Research on the PPP process at the RP Port

PPP Negotiation process as shown in the following:

In the process of establishing PPP, pdsn need and FAAA. HAAA Interaction. At the same time in the packet data business process This interaction more frequent, introduced as follows, there are two cases, simple IP, mobile IP:

Simple IP

Similar to dial-up Internet, each IP address assigned to MS is dynamically variable.

Implementation of MS as a calling packet data call, simple protocol, easy to implement

When switching PPP links, data traffic that is in progress needs to be interrupted. as follows:

simple ip the Span style= "FONT-FAMILY:CALIBRI;" >IPCP ip address pool obtained ip address when switching pdsn

The case where the user-assigned IP address is found in the configuration ACK message in the IPCP process as seen in the specific packet:

Mobile IP

Provides an IP routing mechanism that enables MS to be connected to any subnet with a permanent IP Address

The implementation of Ms as a call or called packet Data communication, and to ensure that MS while switching the PPP link is still maintaining ongoing communication. as follows:

The user always accesses the attribution network regardless of whether roaming, and assigns to obtain the static or dynamic IP address in the attribution network,(assigned by HA to user )roaming does not interrupt the connection, MIP RRP messages that are seen in a specific packet:

Research on the radius of the PI Port

After the configuration of the IP and other user data services begins , Pdsn will send a billing request to AAA as follows: Contains the configured IP address.