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Mapping of EPS Bearer Id, E-RAB Id, RB Id?

+6 votes
2,482 views

I am reading about this IDs and getting doubt about mapping of these ids... Please provide some example to clear this mapping between these IDs

posted Oct 26, 2013 by Sachidananda Sahu

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1 Answer

+1 vote

In LTE, data reaches from external world to UE via a pipe. This pipe consists of ERAB + logical channel + drb identity.

Form PGW to SGW and from SGW to till eNodeB GTP E-RAB is being used.
For an UE, enodeB configures logical channel at its own stack and allocated drb identity for an UE.

There is one to one mapping between these 3 ids.

answer Oct 26, 2013 by Vimal Kumar Mishra
can you make it more clear by taking some example with number ???
Similar Questions
+2 votes

Hello all,

I am trying to create Dedicated EPS bearer to the dongle, But the issue is when MME receives create bearer request from the SGW, it sends Activate Dedicated Bearer Context Request to UE dongle, But UE is not responding with Activate Dedicated Bearer Context Accept message.?

Could anybody please come with possible solutions for the same?

By the UE is sending combined EPS attach.?

0 votes

I have a query related to Dedicated Bearer Creation.

If two UEs are attached to the network and if network is triggering the Dedicated Bearer Creation, how network identifies for which UE it has to create the Dedicated Bearer. Because as part of Create Bearer Request that is from PGW-SGW-MME we are no where specifying the IMSI value or something else related to UE. So how will network identify the UE and initiate the Bearer Creation.?

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