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. 27, 2010
Filed:
Nov. 08, 2004
Sung-won Lee, Seongnam-si, KR;
Dong-ho Cho, Daejeon, KR;
Sun-ho Lee, Daejeon, KR;
Jee-young Song, Daejeon, KR;
Hye-jeong Lee, Daejeon, KR;
Sung-Won Lee, Seongnam-si, KR;
Dong-Ho Cho, Daejeon, KR;
Sun-Ho Lee, Daejeon, KR;
Jee-Young Song, Daejeon, KR;
Hye-Jeong Lee, Daejeon, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A method and system for supporting Internet Protocol (IP) mobility of a Mobile Node (MN) in a mobile communication system. In the mobile communication system supporting Mobile IP (MIP) and Session Initiation Protocol (SIP), MIP location registration is performed in a Home Agent (HA) through a first FA (Foreign Agent) of a first foreign network in which the MN is located. When the MN receives a SIP invite message from a Correspondent Node (CN), it sends, to the CN, a SIP response OK message in which a home address of the MN is recorded. The CN sends a packet to the home address of the MN in a state in which a SIP call of the MN is established. The number of signaling messages and a delay time associated with a handover can be reduced, because the CN sends packets only to the home address of the MN regardless of a changed location of the MN.