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Who will decide whether particular service has to use GBR or NGBR, whether UE will decide this or ENB will decide?

+1 vote
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Who will decide whether particular service has to use GBR or NGBR, whether UE will decide this or ENB will decide?
posted Jul 17, 2017 by Akhilesh

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1 Answer

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Best answer

ENodeB does not modify QoS parameters for a bearer whether it is default or dedicated bearer.
Based on application, UE triggers "Bearer Resource Allocation Request" NAS message to request network to create a dedicated bearer. Now network based on subscription details present in SPR (Subscriber Profile Repository), it decides whether it should initiate "Dedicated bearer creation or not".
Dedicated bearer creation can be initiated from network side also such as VoLTE call. In VoLTE call SIP messages gets exchanged between UE and SIP nodes and after that application function node (AF) initiates dedicated bearer creation by initiating AAR message to PCRF.
In short, eNodeB does not know which application is running between UE and network. For eNodeB, it is just a radio bearer.

answer Jul 18, 2017 by Harshita
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