A.10 Security Functions

25.4673GPPRelease 17Stage 2TSUTRAN architecture for 3G Home Node B (HNB)

The radio interface is ciphered/integrity protected upon request of the Core Network. The ciphering/ integrity protection is done within UTRAN at the HNB. However, the HNB-GW stores the ciphering and integrity protection related RANAP parameters exchanged in the UE dedicated RANAP signalling messages. The HNB-GW includes the stored ciphering/integrity protection information in the Relocation Request message to the target HNB.