Ask Your Question
0

Correlation-id in S1AP

asked 2019-01-29 12:33:38 +0000

Emi Y gravatar image

In S1AP NAS layer, Additional information IE, how do we know that it's correlation-id? There is no indication for it at the standard.

edit retag flag offensive close merge delete
add a comment

1 Answer

Sort by ยป oldest newest most voted
0

answered 2019-01-29 20:41:39 +0000

Pascal Quantin gravatar image

updated 2019-01-29 21:24:07 +0000

Hi,

I based this on 3GPP 24.301 CR 0640 and 3GPP 24.171 (that suggests to use the correlation ID as the Routing Identifier):

The Routing identifier is the Correlation ID, which is defined in 3GPP TS 29.171 [7], so that the MME can map the Routing identifier to the Correlation identifier when the MME receives an S1-AP Transport Message.

edit flag offensive delete link more

Comments

Thanks. Can I assume that when I have S1AP with LPP container, the additional information IE in NAS layer will be correlation-id?

Emi Y gravatar imageEmi Y ( 2019-02-03 13:44:26 +0000 )edit

Based on 3GPP requirement, yes it should be as explained above. Wireshark will decode it as correlation id if the generic message container type was set to LPP. Please do not forget to accept my answer so that it can be easily found by new comers searching the same question. See the FAQ for details.

Pascal Quantin gravatar imagePascal Quantin ( 2019-02-03 18:31:21 +0000 )edit
add a comment

Your Answer

Please start posting anonymously - your entry will be published after you log in or create a new account.

Add Answer

Question Tools

subscribe to rss feed

Stats

Asked: 2019-01-29 12:33:38 +0000

Seen: 521 times

Last updated: Feb 03 '19