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：US20250132810A1

公开(公告)日：2025-04-24

申请号：US19002805

申请日：2024-12-27

Applicant: ZHEJIANG LAB

Inventor： Nan HAO ,  Xingming ZHANG ,  Xiangming ZHU ,  Fujun ZHANG

IPC: H04B7/185 ,  H04W12/108 ,  H04W60/00

Abstract: A method and a device for improving pipeline safety of a space-terrestrial network architecture. The method pre-registers the profile of a base station in the network repository function network element of a 5G core network; after receiving a relay pipeline connection establishment request initiated by a base station, a relay satellite sends a network function verification request to the network repository function network element through a network expose function network element; after receiving a response to a network function discovery request of the base station, the network expose function network element sets the corresponding verification result of the base station according to whether there is base station registration information and responds to a verification request of the network element; and finally, the relay satellite verifies the verification result cell carried in the received response to determine the legality of the current access to the base station.

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：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.