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Can we have same address for default and dedicated bearers related to the same UE. If yes then why, if no then why not?

+1 vote
Can we have same address for default and dedicated bearers related to the same UE. If yes then why, if no then why not?
posted Aug 31, 2015 by Harshita Dhaliwal

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By address, do you mean ip address ? If yes, then a single UE can be given a single IP Address as a part of the Attach process. In the Attach Accept message, the UE gets the PDN information like IP address , IPV4 network etc.  When the default bearer is established, the IP address is granted. For dedicated bearers, there will be different QoS characteristics. The characteristics of the dedicated bearers are described as a part of Traffic Flow Templates.
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2 Answers

+1 vote

Yes, Same IP address can be assigned for both default and dedicated bearer to a single UE as long as both of the bearers belong to same APN. IP is assigned per APN basis.

answer Sep 7, 2015 by Asad Mehmood
0 votes

Network allocates IP addresses to UE on per PDN basis. First time network allocates an IP address to UE for default PDN. Next time on wards, UE may request to another IP address by using PDN connectivity request.
An UE may hold max of 8 E-RAB .
All of those E-RABs may be default bearers or combination of dedicated and default bearer(s).
At least one default bearer for an UE, is necessary to maintain connectivity with the network.

All the dedicated bearers associated with one default bearer will use the same IP address.

answer Sep 4, 2015 by Vimal Kumar Mishra
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+2 votes

Hi Folks,

I am trying to create multiple dedicated bearers for UE with same tft set. Is it possible to have same tft set for multple dedicated bearers.?

The reason for asking this is I am actually facing a problem while creating multiple dedicated beares. As soon as second dedicated bearer established for UE, UE is sending Bearer Resource Modification with cause (Regular Deactivation). Couldn't able to find why it is happening.!

Please provide some suggestions..


+1 vote

If UE is put in IDLE state and can save battery then why we need DRX for the same..

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