Multiple PDP Contexts Information

Multiple PDP Contexts Overview

The Multiple PDP Contexts functionality allows you to test the UEs running simultaneous PS services, for example, to test the UE that is sending/receiving emails while performing video stream. There are two categories for multiple PDP contexts:

• multiple primary PDP contexts: provides connections to different target networks (PDNs, Packet Data Network). Two or more PDP contexts are independent from one another, each of them uses a unique PDP address. Each PDP context has its own QoS (Quality Of Service) and NSAPI (Network Layer Service Access Point Identifier). Besides, each individual PDP context has a separate RAB (Radio Access Bearer).
• secondary PDP contexts: provides connections to the same PDN but with different QoS. (Not supported yet)

The test set supports to setup multiple (up to two) primary PDP contexts simultaneously with the UE. You can enable/disable the primary PDP contexts independently from one another, with each PDP context using its own IP address (either IPv4 or IPv6) and QOS profile, see Multiple PDP Contexts Parameters .

Operating Considerations

• The test set establishes the requested PDP context based on GPRS Radio Access Bearer , rather than the QOS. You must set the GPRS Radio Access Bearer to 64K PS or HSUPA UL/HSDPA DL PS .
• Setting the QOS profile for each PDP context does not mean that the test set will actually adjust its transmission and reception based on the configured QoS profile. The test set only signals these parameters to the UE via the Active PDP Context Accept message.
• Multiple primary PDP contexts can only be setup one after another. After the first primary PDP context is setup, the second context must be initiated from the UE by sending an Activate PDP Context Request message to the test set. Once two primary PDP contexts are setup, the test set will ignore any additional PDP context requests from the UE.
• For multiple PDP contexts, you can also configure the test set to ignore/reject any PDP Activation request from UE by setting the Activate PDP Context Ignore State (CALL:SERVice:GPRS:IGNore[:STATe] ) or the Activate PDP Context Reject State (CALL:SERVice:GPRS:REJect[:STATe] ). Besides, you can set the rejectable APNs by Access Point Name Settings .
• The following functionalities are not compatible with multiple PDP contexts: External 8960 Handover , Downlink Power Control Information , Ciphering, Compressed Mode , Continuous Packet Connectivity and Simultaneous Services .
• You should set the following settings to their permitted value, or the test set will automatically change it to an appropriate one based on the standard: Maximum Bitrate for Uplink , Maximum Bitrate for Downlink , Guaranteed Bitrate for Uplink , Guaranteed Bitrate for Downlink , Maximum SDU Size . For example, setting the Maximum Bitrate for Uplink to 70 will cause the the test set to change it to 64 automatically. See their GPIB commands for the permitted value range.

Multiple PDP Contexts Setup

You can set two DUT IP addresses to support at most two primary PDP contexts, see DUT IP Setup . The actual DUT IP address used (can be an IPv4 address or an IPv6 address) for each PDP connection is according to the UE's requests and your DUT IP settings.

Related Topics

CALL:MS:IP:ADDRess