# CDMA PDSN Overview

This overview module describes the Cisco Packet Data Serving Node (Cisco PDSN) feature.

It includes the following sections:

Feature Overview

System Overview

Benefits

For More Information

Related Features and Technologies

Related Documents

## Feature Overview

Cisco PDSN is a hardware and IOS software feature that enables a Cisco 7500 series router to function as a gateway between the wireless Radio Access Network (RAN) and the Internet. With Cisco PDSN enabled on a router, a stationary or roaming mobile user can access the Internet, a corporate network intranet, or Wireless Application Protocol (WAP) services. Cisco PDSN supports both Simple IP operation and Mobile IP operation.

Note :Cisco PDSN supports both Simple IP operation and Mobile IP operation, which are referred to as service types. The service type available to a user is determined by the mobile station and by the type of service offered by the service provider. In the context of PDSN, a mobile station is the end user in both Simple IP and Mobile IP operation.

## System Overview

The CDMA2000 network architecture is defined in TIA/EIA/IS-835 Wireless IP Network Standard (also known as 3GPP2 TSG-P and as TR45.6). A typical CDMA2000 network includes terminal equipment, mobile termination, base transceiver stations (BTS), base station controllers (BSC), PDSNs, and other CDMA network and data network entities. In a CDMA cellular network, PDSN is the interface between a BSC and a network router.

## Benefits

### Common IP Data Services Layer

Each standard is aligned with IP.

Second generation (2G) data investment is aligned with third generation (3G) investment.

Enables seamless delivery of IP-based services.

### Common Core Architecture for all Air Interfaces

Supports existing air interfaces.

Consistent with wireline network evolution.

Supports hybrid, multi-standard networks.

### Proxy Mobile IP

Enables Simple IP mobile stations to benefit from mobility.

Improves the customer experience by minimizing disruption to applications when handoff occurs.

### Intelligent PDSN Selection

Selects best PDSN based on workload and prior sessions.

Enables optimal performance.

Scales without disruption service.

### Standard Cisco Hardware and Software

Cisco hardware platforms are proven in some of the largest networks in the world.

PDSN runs with the standard Cisco IOS feature set, which includes rich IP, security, QoS, mobile IP, and voice-data integration capability.

## For More Information

Cisco IOS IP and IP Routing Configuration Guide

IP Routing Protocol-Independent Protocols

Configuring IP Routing Protocols

Cisco IOS Software Release 12.1 Features, No. 1078

## Related Features and Technologies

Mobile IP

Point-to-Point protocol (PPP)

Authentication Authorization and Accounting (AAA)

Virtual Private Data Network (VPDN)

Remote Authentication Dial-In User Service (RADIUS)

## Related Documents

Cisco IOS Security Command Reference and Configuration Guide

Cisco IOS Dial Services Command Reference

Cisco IOS IP and IP Routing Command Reference and Configuration Guide

Cisco IOS Dial Services Configuration Guide

Virtual Private Network Services

## Related Topics

CDMA PDSN System Statistics

CDMA PDSN PCF Statistics

CDMA PDSN Session Statistics

Registration Statistics

RP Update Statistics Information