NAS algorithm transmission method and device

摘要

Disclosed are an NAS algorithm transmission method and device, which are used to achieve the process of determining an NAS algorithm by an HSS and sending same to an MME, so that an operator an modify subscription information about the HSS according to a BOSS end, and freely configure the NAS algorithm in accordance with subscribers of different qualifications. An NAS algorithm notification method provided in the application comprises: a home subscriber server (HSS) determining an NAS algorithm list which comprises an NAS encryption algorithm list and an NAS integrity algorithm list; and the HSS sending the NAS algorithm list to a mobility management entity (MME).

主权项

1. A notification method of a Non Access Stratum, NAS, algorithm, the method comprises:
determining, by a Home Subscriber Server, HSS, a list of NAS algorithms comprising a list of NAS encryption algorithms and a list of NAS integrity algorithms; and sending, by the HSS, the list of NAS algorithms to a Mobility Management Entity, MME, so that the MME selects the NAS algorithm from the list of NAS algorithms and notifying the UE of the selected NAS algorithm, and MME and UE perform encryption protection and integrity protection for a NAS message using the selected the NAS algorithm; wherein the step of selecting and notifying by the MME comprises: determining, by the MME, a set A1 of NAS encryption algorithms and a set A2 of NAS integrity algorithms supported by the MME; determining, by the MME, a set B1 of NAS encryption algorithms and a set B2 of NAS integrity algorithms supported by the UE; determining, by the MME, the set C1 of NAS encryption algorithms and the set C2 of NAS integrity algorithms in the list of NAS algorithms; determining, by the MME, an intersection D1 of the sets A1, B1 and C1 and an intersection D2 of the sets A2, B2 and C2; and notifying, by the MME, the UE of NAS encryption algorithms in the intersection Dl and NAS integrity algorithms in the intersection D2.