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. 06, 2001
Filed:
Jun. 04, 1997
Applicant:
Inventors:
Assignee:
NTT Mobile Communications Network Inc., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04L 1/228 ; H04L 1/256 ; H04Q 7/20 ; H04B 7/00 ;
U.S. Cl.
CPC ...
H04L 1/228 ; H04L 1/256 ; H04Q 7/20 ; H04B 7/00 ;
Abstract
A perch channel transmission and cell selection method for a CDMA mobile communication system which is capable increasing a system capacity by reducing an amount of interference power. In this method, each base station intermittently transmits a perch channel which is spread by using a spread code assigned to each base station. Then, a mobile station receives more than one perch channels transmitted from more than one base stations, measures a receiving level of an intermittently transmitted portion of each received perch channel, and judges a located cell according to measured receiving levels of these more than one perch channels.