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:
Nov. 01, 2005
Filed:
May. 07, 2003
Sharada Raghuram, Buffalo Grove, IL (US);
Richard C. Burbidge, Hook, GB;
Donald A. Dorsey, Vernon Hills, IL (US);
Sharada Raghuram, Buffalo Grove, IL (US);
Richard C. Burbidge, Hook, GB;
Donald A. Dorsey, Vernon Hills, IL (US);
Motorola Inc, Schaumburg, IL (US);
Abstract
A method for a radiotelephone to scan for a higher priority (including home) public land mobile network (PLMN) without searching in all possible RATs and frequencies includes a first step of establishing an inclusive list of all frequencies in all radio access technologies (RATs) in use by the higher priority or home public land mobile network. A next step includes camping the radiotelephone on the higher priority or home PLMN. A next step includes obtaining the inclusive list from the establishing step by the camped radiotelephone from the higher priority or home PLMN. Afterwards, when the radiotelephone roams to a lower priority visited PLMN, it can begin scanning for the home (and higher priority) PLMN using only those frequencies from the inclusive list, thereby saving battery power.