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LTE: When does an eNodeB send Error Indication message to MME for an UE ?

+3 votes
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LTE: When does an eNodeB send Error Indication message to MME for an UE ?
posted Jan 28, 2016 by Harshita

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2 Answers

+1 vote

In simple words:

eNodeB should send Error Indication to MME for either of the following cases:

  1. When MME sends a message to eNB for a UE with wrong or missing or invalid enb-ue-s1ap-id/mme-ue-s1ap-id
  2. When MME sends a message to eNB for a UE with wrong values for any mandatory IE
answer Jan 31, 2016 by Sourav Mondal
0 votes

As per definition presents in the specification, when a node (either eNodeB or MME) receives an incoming message, and finds an error then it responds back to the sender with the Error Indication message.
In an online reference , I saw a call flow in which error indication message was being sent from eNodeB to MME when eNodeB has encountered an issue related to radio interface for an UE.

answer Jan 28, 2016 by Vimal Kumar Mishra
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