EP 1782548 A4 20120829 - APPARATUS AND METHOD FOR DETERMINING USER CODE IN QUASI-SYNCHRONOUS CDMA SYSTEM, AND APPARATUS AND METHOD FOR GENERATING AND SPREADING USER CODE USING THE SAME
Title (en)
APPARATUS AND METHOD FOR DETERMINING USER CODE IN QUASI-SYNCHRONOUS CDMA SYSTEM, AND APPARATUS AND METHOD FOR GENERATING AND SPREADING USER CODE USING THE SAME
Title (de)
VORRICHTUNG UND VERFAHREN ZUR BESTIMMUNG VON BENUTZERCODE IN EINEM QUASISYNCHRONEN CDMA-SYSTEM UND VORRICHTUNG UND VERFAHREN ZUM ERZEUGEN UND SPREIZEN VON BENUTZERCODE DAMIT
Title (fr)
APPAREIL ET PROCEDE POUR LA DETERMINATION DE CODE D'UTILISATEUR DANS UN SYSTEME A ACCES MULTIPLE PAR REPARTITION DE CODE (AMRC) QUASI-SYNCHRONE, ET APPAREIL ET PROCEDE POUR LA GENERATION ET L'ETALEMENT DE CODE D'UTILISATEUR METTANT EN OEUVRE UN TEL APPAREIL
Publication
Application
Priority
- KR 2004003409 W 20041222
- KR 20040061348 A 20040804
Abstract (en)
[origin: WO2006014044A1] Provided are an apparatus and method for selecting a user code according to the number of access users in a quasi-synchronous CDMA system, and an apparatus and method for generating/spreading a user code using the same based on scrambling. The apparatus of the present researches minimize interference elements among user codes in a range of a synchronous error by classifying user codes into two code groups in a base station of a quasi-synchronous CDMA system, selecting a specific code group according to present access user numbers, transmitting the specific code group to a terminal, generating a user code according to the code group in the terminal, and using a scrambling code pattern minimizing a correlation characteristic among user codes. The user code selecting apparatus includes : an access user counting block for counting present access user number upon a user access/termination request signal from a terminal; a code group selecting/converting block for selecting a user to convert a code group of the present access user by checking a value of access user counting block upon a user access request signal from the terminal, selecting a corresponding user code group, and checking a value of the access user counting block and a code group of the termination request user upon a user access termination request signal from the terminal; and a code group selection/conversion signal transmitting block for transmitting the code group selection/conversion signal to the terminal upon a control of the code group selecting/converting block.
IPC 8 full level
H04J 13/16 (2011.01); H04J 13/00 (2011.01); H04J 13/10 (2011.01); H04W 16/10 (2009.01); H04J 13/18 (2011.01)
CPC (source: EP KR)
H04B 1/7073 (2013.01 - KR); H04J 13/16 (2013.01 - EP); H04J 13/18 (2013.01 - KR); H04L 1/0003 (2013.01 - EP); H04J 13/0048 (2013.01 - EP); H04J 13/10 (2013.01 - EP); H04J 13/18 (2013.01 - EP)
Citation (search report)
- [XYI] US 2002089950 A1 20020711 - SOUROUR ESSAM [US], et al
- [XYI] WO 9912284 A1 19990311 - ERICSSON TELEFON AB L M [SE]
- See references of WO 2006014044A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2006014044 A1 20060209; EP 1782548 A1 20070509; EP 1782548 A4 20120829; KR 100662506 B1 20061228; KR 20060012725 A 20060209
DOCDB simple family (application)
KR 2004003409 W 20041222; EP 04808540 A 20041222; KR 20040061348 A 20040804