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Cell activation failed

Publication Date:  2018-01-04 Views:  79 Downloads:  0
Issue Description
We are trying to active the cell, but due to the clock resources, we can't perform this process. 


Alarm Information


Handling Process

For the firtst time i suggest to check the below possible causes:

I) Please check the GPS status.

II) You can check the clockmode and you should set according to TDD configuration.

Root Cause

The issue was that the clock synchronization was configured as "frequency" and the "clock sync mode" it shoud be configured as time. 

Once this configuration was modified the issue was solved. 

Solution

Cell status showing clock error shown below.


Display dynamic parameters of cells
-----------------------------------
Local Cell ID  Cell instance state  Reason for latest state change  Cell latest setup time  Cell latest setup operate type  Cell latest remove time  Cell latest remove operate type  Cell power save state  Symbol shutdown state  Anti Interfere Status in High Speed Scenario  Primary BBP information  Cell topology type  Maximum transmit power(0.1dBm)

                      
0              Uninstall            Cell setup succeeded.            2018-01-03 10:05:30     Cell Healthy Check              2018-01-03 07:12:08      Block Cell High                  Uninstall              Uninstall              Disable                                       NULL                     Invalid Type        65538                        
1              Uninstall            No clock resources available.    2018-01-03 11:03:22     Cell Healthy Check              2017-01-03 07:12:08      Cell Setup Fail                  Uninstall              Uninstall              Disable                                       NULL                     Invalid Type        65538                        

Suggestions

List Clock Synchronization Mode
-------------------------------
Clock Synchronization Mode  =  FREQ
Frame Sync Switch  =  OFF
Locked System Clock Source  =  Local Standard Clock


For TDD you need to change the FREQUENCY to TIME. .

You shoud check if the change was succesfully executed. 

Display System Clock Status
---------------------------
                 Cabinet No.  =  0
                 Subrack No.  =  0
                    Slot No.  =  7
        Current Clock Source  =  GPS Clock
  Current Clock Source State  =  Normal
          Clock Working Mode  =  Auto

                  PLL Status  =  Locked

  Clock Synchronization Mode  =  TIME

GSM Frame Bit Offset(1/8bit)  =  0
       GSM Frame Sync Switch  =  ON


END