Description  Claims  Drawing  Cited references 

EP2482574A1   [0005] 
EP2552155A1   [0009] 

3GPP TSG-RAN WG2, R2-140049   [0006] 
3GPP TS 23.401 v12.3.0   [0007] 
3GPP TSG-RAN WG2, R2-134620   [0008]