公开(公告)号：US12192556B2

公开(公告)日：2025-01-07

申请号：US18592565

申请日：2024-03-01

Applicant: ZHEJIANG LAB

Inventor： Xiangming Zhu ,  Shanyun Liu ,  Nan Hao

IPC: H04N21/2665 ,  H04N21/2183

Abstract: A content caching method for a satellite terrestrial integrated network with differentiated interests and access modes, including: collecting user proportion information, content popularity distribution information, cache capacity information, and link delay information in the satellite terrestrial integrated network; determining a content caching problem of the collaboration of base stations and a satellite for a delay optimization based on differentiated user interests and differentiated access modes; solving the content caching problem to obtain a content caching strategy of the collaboration of the base stations and the satellite; and based on the obtained content caching strategy, caching contents in the base stations and the satellite to provide a content service for base station access users and satellite access users in the satellite terrestrial integrated network.

公开(公告)号：US12289157B2

公开(公告)日：2025-04-29

申请号：US18085495

申请日：2022-12-20

Applicant: ZHEJIANG LAB

Inventor： Bin Yang ,  Shanyun Liu ,  Xiangming Zhu ,  Yinan Qi ,  Xingming Zhang ,  Yongdong Zhu ,  Tao Xu ,  Peijun Chen ,  Kainan Zhu

IPC: H04B7/185 ,  H04W12/06

Abstract: Disclosed is a two-phase access authentication method integrating spatial-temporal features in space-air-ground integrated networks. In the method, an access authentication is divided into two phases: a primary authentication phase and a continued authentication phase. In the primary authentication phase, a user equipment and a satellite are respectively initialized and registered through a ground network control center. In the authentication phase, a fast and secure access is achieved by using a user ID, facial features, and other authentication factors. In the continued authentication phase, data of a user flow and behavior features are acquired, and feature comparison is performed by using historical user data; and a security level and an authentication decision are output. According to the disclosure, the spatial-temporal features are integrated to perform access authentication on a satellite-ground communication network, the authentication not only achieves a fast access, but also continuously ensures the system security in a service phase.