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Does a UE define or indicate Access Point Name during Attach procedure?

+1 vote
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Does a UE define or indicate Access Point Name during Attach procedure?
posted Aug 11, 2013 by Salil Agrawal

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2 Answers

+1 vote
 
Best answer

UE does not need to (but it can if it is configured with one) to define APN. This can be a parameter fetched from HSS that is e.g. assigned as a default server for all the UEs in this PLMN for initial attach.

answer Aug 12, 2013 by Deepak Dasgupta
+2 votes

Only when a UE intends to create a PDN connection, it sends Attach request embedded with ESM PDN connectivity request, it indicates APN in the 'Access point Name' IE. Otherwise it would'nt. It would simply attach to the existing PDN(already connected previously).
This link provides comprehensive PCAPs for all messages.
http://www.sharetechnote.com/html/BasicCallFlow_LTE.html

answer Aug 11, 2013 by Chandra Javalkar
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