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:
Dec. 05, 2006
Filed:
Aug. 09, 2000
Sang-hoon Seo, Kyoungki-do, KR;
Tae-gue Kim, Kyoungki-do, KR;
Tae-hoon Park, Kyoungki-do, KR;
In-hong Lee, Kyoungki-do, KR;
Sun Park, Kyoungki-do, KR;
Sang-Hoon Seo, Kyoungki-do, KR;
Tae-Gue Kim, Kyoungki-do, KR;
Tae-Hoon Park, Kyoungki-do, KR;
In-Hong Lee, Kyoungki-do, KR;
Sun Park, Kyoungki-do, KR;
SK Telecom Co. Ltd, , KR;
Abstract
A method for carrying out an idle handoff from a macrocell to a microcell (picocell) in a hierarchical cell structure includes the steps of: a) allocating different frequency assignments (FA) to the macrocell and the microcell in a same service band, to construct the hierarchical cell structure; b) transmitting cell structure information of neighboring base stations and pseudo noise (PN) code from base station to mobile station; c) checking whether the mobile station is in the hierarchical cell by using the cell structure information of neighboring base station; and d) checking whether a value of the pseudo noise (PN) code is greater than T_ADD and greater than Ec/Io of the macrocell by periodically searching the pseudo noise (PN) code of the microcell, to carry out an idle handoff to the microcell, wherein the T_ADD represents a value of base station pilot strength required for the base station of neighboring set to be included in a candidate set, the Ec represents an pilot energy accumulated during one pseudo noise (PN) chip period, and the Io represents a total power spectrum density within a reception bandwidth.