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:
Jan. 31, 2006
Filed:
Nov. 15, 2002
Kadathur S. Natarajan, Wilmette, IL (US);
Karthikeyan Arumugam, Wauconda, IL (US);
Muddasani S. Reddy, Lake Bluff, IL (US);
Mary M. Valdivia, Lake Zurich, IL (US);
Ajoy K. Singh, Round Lake, IL (US);
Kadathur S. Natarajan, Wilmette, IL (US);
Karthikeyan Arumugam, Wauconda, IL (US);
Muddasani S. Reddy, Lake Bluff, IL (US);
Mary M. Valdivia, Lake Zurich, IL (US);
Ajoy K. Singh, Round Lake, IL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
An apparatus and method for performing Mobile/IP handoff between different access technologies. Associated with each access technology are two thresholds, a Low Water Mark and a High Water Mark. The method uses these water marks to its access technology selection in a particular environment. Using the method, a mobile noderemains on its preferred network when the signal strength on the preferred network (interface) is above the low water mark. When the signal strength on the preferred network drops below the high water mark, the method calculates the low water mark for the network. When the signal strength on the preferred network drops below the low water mark (LWM), the method initiates handoff to the next available network that meets certain conditions. The method initiates handoff back to the preferred network when the signal strength measurement on the preferred network is again above the high water mark.