UE Initiated Dedicated Bearer

Jack Broderick jbroderick at councilrock.com
Mon Apr 26 15:43:27 UTC 2021


I am currently attempting to setup multiple PDN connections to support QOS
by creating a dedicated bearer, configuring the QOS profile and Traffic
Flow Template, then sending a request to the MME for this second context.

I have been following the 3GPP AT command guide to no avail:

1. Define a default bearer +CGDCONT: 1,"IP","internet","",0,0,0,0
2. Define a dedicated secondary bearer referencing the default
bearer: +CGDSCONT: 2,1,0,0
3. Define a QOS profile for the dedicated
bearer: AT+CGEQOS=2,2,2944,960,10000,10000
4. Define a traffic flow template for the QOS
profile: AT+CGTFT=2,5,0,,,"5205.5205"
5. Activate default bearer (successfully)

6. Activate dedicated bearer (unsuccessfully)

I then came across this MR
which appears to be related to creating multiple bearers and configuring
said profiles through MM. I didn't see anything specifically related to
QOS/dedicated bearers but it made me wonder if this goal could be
accomplished with MM.  I am curious if anyone has experience with creating
UE Initiated Dedicated bearers with AT commands? Or, more related to the
context of this forum, if there are provisions for this configuration
within MM.

Any support/comments would be greatly appreciated.


Jack Broderick
R&D Engineer
Council Rock
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