The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 07, 2015
Filed:
Oct. 29, 2009
Chae Gwon Lim, Seoul, KR;
Tae Sun Yeoum, Seoul, KR;
Sung Ho Choi, Suwon-si, KR;
Jong Moon Chung, Seoul, KR;
William Jin Ho Song, Seoul, KR;
Dae Young Lee, Seoul, KR;
Chae Gwon Lim, Seoul, KR;
Tae Sun Yeoum, Seoul, KR;
Sung Ho Choi, Suwon-si, KR;
Jong Moon Chung, Seoul, KR;
William Jin Ho Song, Seoul, KR;
Dae Young Lee, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Industry-Academic Cooperation Foundation, Yonsei University, Seoul, KR;
Abstract
A data forwarding method and system is provided for avoiding data loss during a vertical handover by forwarding data through an IP tunnel established between a newly introduced network entity called a Data Forwarding Function of the serving network and a Forward Attachment Function of a target network. A data forwarding method of a data forwarding unit located in a serving network for a vertical handover according to the present invention includes receiving an address of a forwarding attachment unit located in a target network and a data forwarding preparation request that are transmitted by a user equipment; establishing an Internet Protocol (IP) tunnel to the forwarding attachment unit according to the data forwarding preparation request; and forwarding, when a vertical handover is initiated, handover packets to the forwarding attachment unit through the IP tunnel.