LTE: How does Initial Context Setup Procedure work ?

Question

After initial context setup request,enodeb sends transfer syntax error.
What could be it reason
Does extended Bit set as true makes any difference.

Answer 1

Initial Context Setup Procedure is triggered by MME. The objective of this procedure is to establish a default bearer for an UE. This procedure may also establish dedicated bearer. It depends on NAS message.
For example: Attach Request just ask to establish a default bearer whereas service request message may map to a dedicated bearer establishment.