MOBILE COMMUNICATION METHOD AND MOBILE STATION Russian patent published in 2013 - IPC H04W12/04 

FIELD: radio engineering, communication.

SUBSTANCE: in the disclosed method, a radio communication handover target base station (Target eNB) receives from a switching centre a first key (K_eNB[n+1]) for generating a second key (K_eNB[n+1][0]), wherein K_eNB[n+1] is determined by a parameter (KI); the Target eNB then generates a certain key (Ko) used for communication between the Target eNB and UE, from the K_eNB[n+1][0]; the UE then receives the KI contained in the handover command signal; the UE, upon receiving said signal from a radio communication handover source base station (Source eNB), when the received KI is greater than the previous KI stored in the UE, generates a K_eNB[n+1] for generating K_eNB[n+1][0] based on the master key (K_Asme) and the previous first key (K_eNB[n]) determined by the previous KI, wherein the KI is obtained by increasing the previous KI used when generating K_eNB[n], used to generate the previous (K_eNB[n+1][0]), used to generate the previous Ko used for communication between the Source eNB and UE.

EFFECT: simple procedure for generating a communication key.

2 cl, 12 dwg