Timer T321:
*Starts* upon receipt of measConfig including a reportConfig with the purpose set to reportCGI
*Stops* at either of following cases:
1. Upon acquiring the information needed to set all fields of globalCellId for the requested cell
2. upon receipt of measConfig that includes removal of the reportConfig with the purpose set to reportCGI
3. At expiry initiates the measurement reporting procedure, stop performing the related measurements and remove the corresponding measID
