公开(公告)号：US20250080321A1

公开(公告)日：2025-03-06

申请号：US18556168

申请日：2023-05-30

Applicant: ZHEJIANG LAB

Inventor： Nan HAO ,  Xingming ZHANG ,  Xiangming ZHU ,  Zhenting LI ,  Mengmeng LIU

IPC: H04L9/06 ,  H04L9/32

Abstract: The present disclosure provides methods and apparatuses for improving user security of satellite-ground integrated network systems. On the basis of the satellite-ground integrated network pipeline only authenticates a terminal in a satellite-ground integrated network, a two-stage authentication based on CA digital certificates and user characteristic information is put forward for users and services using the terminal. The two-stage authentication includes: firstly, when a first spatio-temporal information ciphertext digest obtained from spatio-temporal information ciphertext in a service request by using a digest algorithm is consistent with a second spatio-temporal information ciphertext digest obtained by decrypting a digital signature in the service request using a user public key, the user is legal; furthermore, when spatio-temporal information characteristics obtained by decrypting the spatio-temporal information ciphertext using a private key of the satellite-ground integrated core network are consistent with spatio-temporal characteristics in the digital certificate, the verification succeeds.

公开(公告)号：US20240305849A1

公开(公告)日：2024-09-12

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

CPC classification number: 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：US20250031256A1

公开(公告)日：2025-01-23

申请号：US18259572

申请日：2023-03-03

Applicant: ZHEJIANG LAB

Inventor： Nan HAO ,  Xingming ZHANG ,  Hong ZHANG ,  Jun ZHU ,  Xiangming ZHU ,  Ning ZHENG

IPC: H04W76/12 ,  H04W12/084 ,  H04W76/11 ,  H04W76/25

Abstract: A method of signaling interaction in 5G space-ground integrated heterogeneous network architecture is provided, which enables publicly available data for trusted satellite discovery to be registered to the 5G core network based on the function framework of the 5G core network. When searching for satellites, a gNB can utilize the publicly available data of the trusted satellite registered in the 5G core network to speed up satellite searching, improve satellite link services, and filter out untrusted satellites. By the method provided by the present disclosure, it can effectively improve the satellite search speed in the 5G space-ground integrated architecture, improve satellite link availability, reduce authentication complexity of satellites in ground networks in heterogeneous network architecture.

公开(公告)号：US20230261742A1

公开(公告)日：2023-08-17

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

CPC classification number: H04B7/18593 ,  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.