Patent ID: 9686683
Date: 2017-06-20
CPC Classifications: H04L,H04W

Claim:
1. A secure Small Data Transmission (SDT) method for a Machine Type Communication (MTC) device group, comprising a process of generating, by an MTC device and an MTC Interworking Function (MTC-IWF), a shared key K IWF on the basis of a Generic Bootstrapping Architecture (GBA) key agreement process: sending, by the MTC device, to a Bootstrapping Server Function (BSF), an initialization request carrying MTC device identification information and MTC device group identification information; after receiving the initialization request from the MTC device, sending, by the BSF, to a Home Subscriber Server (HSS), a retrieval request carrying the MTC device identification information, MTC device SDT capability information and the MTC device group identification information; determining, by the HSS, whether the MTC device belongs to the MTC device group or not according to the MTC device identification information and the MTC device group identification information; when determining that the MTC device belongs to the MTC device; group, determining, by the HSS, whether the MTC device has a small data sending and receiving capability or not; when determining that the MTC device belongs to the MTC device group and has the small data sending and receiving capability, sending, by the HSS, user security configuration information and an Authentication and Key Agreement (AKA) authentication vector generated on the basis of an MTC device group key to the BSF; and performing, by the BSF, AKA authentication with the MTC device according to the received AKA authentication vector; and after the AKA authentication between the BSF and the MTC device succeeds, generating, by the MTC device and the BSF, a root key Ks; and generating, by the MTC device, the BSF and the MTC-IWF, K wherein the method further comprises: after at least one MTC device in the MTC device group creates a shared key K performing, by the BSF, AKA vector authentication with the further MTC device according to a recently adopted authentication vector corresponding to the MTC device group identifier after determining that there is K generating, by the further MTC device, the BSF and the MTC-IWF, K