top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

LTE : How to know cell type ?

+3 votes
418 views

There is an IE Cell Type, which tells about the size of a cell (very small, small, medium and large) . I have concern how an UE realize about the size of a cell ?

posted Feb 13, 2014 by Vimal Kumar Mishra

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

1 Answer

0 votes

As u mentioned cel type talks about size of a cell (very small, small, medium and large) ,
This information will not help to UE any how ,But this info is help ful for Neighboring ENBs,so that they can know from where the UE came and can judge the handover failure (due to interference too ).

This we send in UE history info which contains the info about the last visited ENODEBs .

If X2 is there is there Neighbour ENB get this info history info in X2- HandoverRequest message otherwise it can also come in sourceenbtotargetenb transparent container in S1AP messages

answer Feb 13, 2014 by Sachidananda Sahu
Similar Questions
+11 votes
LTE: In RRC connected mode, when an UE moves from one cell to another cell what messaging happen ?

If I am right, an eNodeB can support multiple cells and each cell has different pci.
Now suppose enodeB has two cells i.e cell1 and cell2. If I am going right, both the cell(s) should have different PCIs.
I have assumed UE is attached to cell1 and due to mobility, it is moved to cell2. During this movement, what message shall be exchanged between UE and enodeB. And Is there any message send to MME regarding the new cell ?

+3 votes
LTE: How does an eNodeB construct ECGI and TAI for an UE while sending messages like "Initial UE message " ?

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 ?

+2 votes
LTE: Why "Handover Type" IE is included in both handover messages i.e Handover Required and Handover Request ?

I was looking into IEs of handover required and handover command messages defined in 36.413 specification.
Sending "handover type" in handover required message towards the MME make sense but again get back the same IE in handover command message from MME in the handover command message, I could not make out the reason behind it.
Can someone please explain the reason of presence of "Handover Type" IE in the handover command message when eNodeB already knows which type of request it sent to MME for an UE ?

Is there any possibility MME can change the type of Handover in handover command message ? If yes then what could be the scenarios ?

...