MME selection by eNodeB

4G LTE
, ,
1

How enodeb selects MME from the pool area with respect to RC value… RC=relative capacity

2
  1. if RRC conn request message: UE provide MME id in identity number -> enb will select this MME.
  2. If UE not provide MME id:
  • based on priority: MME in the pool has higher priority, enb will select
  • based on capacity & load: Relative load = Number of dedicated S1-MME connections x 255/Relative capacity of the MME.
    eNodeB selects the MME with the minimum relative load in an MME pool.
3 Likes
3

Thanks great input… From where dedicated S1-MME connection details we can get.

4

enb know how many S1-connection for each MME in the pool. Each user in connected mode has 1 S1-connection.
You can check by DSP S1INTERFACE in Huawei enb command.

5

Can we have nokia enb details… Where we can check the dedicated connection.

6

Hi Hainm … your description is on point.
What I am not sure is how the eNodeB should select the correct MME when there is a handover from 3G to LTE.

7

Not have handover from 3G to 4G. When UE reselect from 3G to 4G, it does not have old GUTI number, enb will random chose any MME in the pool.

1 Like
8

I want to know how enode-B calculates the load of mme ?