Cisco ASR 5000 Series, Обзор продукта

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CDMA2000 Wireless Data Services
▀ Understanding Simple IP and Mobile IP
▄ Cisco ASR 5000 Series Product Overview
OL-22938-02
How Simple IP Works
As described earlier, Simple IP uses two basic communications protocols, PPP and IP. The following figure depicts
where each of these protocols are used in a Simple IP call.
Figure 73. Simple IP Protocol Usage
As depicted in the figure above, PPP is used to establish a communications session between the MN and the PDSN.
Once a PPP session is established, the Mobile Node (MN) and end host communicate using IP packets.
The following figure and table provides a high-level view of the steps required to make a Simple IP call that is initiated
by the MN to an end host. Users should keep in mind that steps 2, 3, 11, and 12 in the call flow are related to the Radio
Access Node (RAN) functions and are intended to show a high-level overview of radio communications iterations, and
as such are outside the scope of packet-based communications presented here.