top button
Flag Notify
    Connect to us
      Facebook Login
      Site Registration Why to Join

Facebook Login
Site Registration

LTE: Does the encoding steps for PLMN vary in case of two and three digits MNC at eNodeB ?

+4 votes

This is the format, I know PLMN is encoded.

enter image description here

Is there any change in the above format for three digits MNC ?

posted Jun 1, 2018 by Vimal Kumar Mishra

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

2 Answers

+2 votes

I have always seen the same encoding steps in case of two and three digits MNC. I checked with my colleagues as well. If you are getting different encoding results then probably this would a bug in code at eNodeB. Let's others to respond on this query but I am 100% confident on my answer.

answer Jun 3, 2018 by Harshita
Thanks Harshita to spend some time to my query. Ganesh answer is correct, PLMN is encoded differently at NAS and S1-AP layers in case of 3 digits MNC. For reference, please go through the 36.413, section which tells about encoding format of PLMN at S1-AP layer. PLMN enconding at the NAS layer anyway captured at 24.301.
Thanks Vimal to correct me and sharing references. I'll go through those references and get back to you if I have any doubt or need more clarity.
+1 vote

In case of 2 digits MNC, there is no difference in NAS and S1-AP PLMN encoding. But in case of three digits MNC, NAS and S1-AP results differently. For more details on PLMN encoding, refer NAS and S1-AP specifications.

answer Jun 6, 2018 by Ganesh
Thanks Ganesh for your valuable answer.
Similar Questions
0 votes

When target eNodeB is not able to allocate resource for all the bearers which comes as part of Handover Request message, it sends handover request ack with partial success since "E-RABs Failed to Setup List" is present in HOReqAck message.
What MME or source eNodeB does in that case ? Does any action taken by MME for the E-RABs which failed to setup at target eNodeB or some other actions taken ?

+1 vote

As one failure message is defined in specification for the path switch procedure then what would be the behavior of target eNodeB after getting failure response from the MME ? Action would be vendor specific or standard action has been defined for this scenario ?

+3 votes

Need clarity on following items:
1. What is the use of "UE selected plmn" information for an eNodeB ?
2. Is the ECGI/TAI constructed based on the primary plmn (PLMN broadcasted in 0th index in SIB1 ) or based on the UE selected PLMN ?

+1 vote

What is the significance of UE capability Information at MME ? What decisions are affected based on the UE capability information ?

Contact Us
+91 9880187415
#280, 3rd floor, 5th Main
6th Sector, HSR Layout
Karnataka INDIA.