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Title:
ACQUIRING PERMANENT IDENTIFIER OF USER EQUIPMENT BY GATEWAY IN MOBILE COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2019/134182
Kind Code:
A1
Abstract:
A gateway (GW) acquires an International Mobile Subscriber Identity (IMSI) of a user equipment (UE) without requesting a mobile management entity (MME) of a core network (CN) to provide it. The GW detects arrival of a S1AP message for the UE. If the GW does not have the IMSI of the UE, and if a NAS payload of the S1AP message is ciphered, send to the UE a rejecting message indicating detaching the UE from the CN, causing the UE to request re-attaching to the CN in a S1AP message that is an Initial UE Message, which contains a temporary identifier of the UE. Then alter the Initial UE Message with a fabricated temporary identifier not recognizable by the MME and send the altered message to the MME, causing the MME to ask the UE to identify itself with the IMSI, which is read by the GW.

Inventors:
MUI, Ka Ho (Flat G, 33/F Block 5, Kingsford Terrace, Kowloon, Hong Kong, Kong, CN)
TSANG, Yau Yau Yolanda (4/F Flat A, Roca Centre Block 2, 466 King'Road, North Point, Hong Kong, Kong, CN)
WONG, Yee Simon (13D Block 7, Noble Hill 38 Ma Sik Road, Sheung Shui, NT, Hong Kong, Kong, CN)
Application Number:
CN2018/072203
Publication Date:
July 11, 2019
Filing Date:
January 11, 2018
Export Citation:
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Assignee:
HONG KONG APPLIED SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE COMPANY LIMITED (5/F Photonics Centre, 2 Science Park West AvenueHong Kong Science Park, Shatin, New Territories, Hong Kong, Kong, CN)
International Classes:
H04W8/08
Attorney, Agent or Firm:
CHINA PAT INTELLECTUAL PROPERTY OFFICE (2nd Floor, Zhongguancun Intellectual Property Building Block B, No.21 Haidian South Road, Haidian District, Beijing 0, 100080, CN)
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