A look at PDP Context in UMTS networks

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A look at PDP Context in UMTS networks
look at PDP Context in UMTS networks
By
Zahid Ghadialy
Last Updated: 04/11/2007
Packet Data Protocol (PDP)
A Packet Data Protocol (PDP) context offers a packet data
connection over which the UE and the network can exchange IP packets.
Usage of these packet data connections is restricted to specific
services. These services can be accessed via so-called access points.
Packet Data Protocol Context is one of the most important concepts for the UMTS Packet Data Architecture.
The PDP Context has a record of parameters, which consists of
all the required information for establishing an end-to-end connection:

• PDP Type
  
• PDP address type
  
• QoS profile request (QoS parameters requested by user)
  
• QoS profile negotiated (QoS parameters negotiated by network)
  
• Authentication type (PAP or CHAP)
  
• DNS type (Dynamic DNS or Static DNS)
  

The PDP Context is mainly designed for two purposes for the terminal.

• Firstly PDP Context is designed to allocate a Packet Data Protocol
  (PDP) address, either IP version 4 or IP version 6 type of address, to
  the mobile terminal.
  
• Secondly it is used to make a logical connection with QoS
  profiles, the set of QoS attributes negotiated for and utilized by one
  PDP context, through the UMTS network.

Multiple PDP Context
As mobile phones develop, there will be a need to serve parallel
applications running on them with simultaneous PS calls. These PS calls
can differ in their QoS (Quality of Service) parameters, and/or in the
target network (PDN