Method, system realizing RRC signal order integrality protection referring to SRNS relocation and wireless network controller

The invention discloses a method relating to the relocation of SRNS for realizing the integrity protection of RRC signaling. TRNC sends message to UE by adopting the serial number which is added with bias and the corresponding superframe number. To be more specific, the SRNC adds bias to the stored serial number and modifies the superframe number; the serial number and the superframe number are sent to the TRNC which sends message to a user terminal by the received serial number and the superframe number; or the SRNC sends the reserved serial number and the superframe number to the TRNC whichadds bias to the serial number and modifies the superframe number; messages are sent to a user terminal by the serial number and the superframe number. The invention also discloses a system relating to the relocation of the SRNS for realizing the integrity protection of RRC signaling and a radio network controller. The invention can realize the sameness of the user terminal as the serial number and the superframe number of the TRNC, thereby ensuring the realization of the integrity protection in the process of the relocation of the SRNS, more particularly, the situation that the SRNC excessively sends information in the process of relocation, and further reducing words dropping.