EP 1281244 A2 20030205 - A METHOD AND AN APPARATUS FOR IMPROVING STABILITY AND CAPACITY IN CDMA MEDIUM DATA RATE SYSTEMS
Title (en)
A METHOD AND AN APPARATUS FOR IMPROVING STABILITY AND CAPACITY IN CDMA MEDIUM DATA RATE SYSTEMS
Title (de)
VERFAHREN UND VORRICHTUNG ZUR VERBESSERUNG DER STABILITÄT UND KAPAZITÄT IN CDMA SYSTEMEN MIT MITTLEREN DATENRATE
Title (fr)
PROCEDE ET APPAREIL PERMETTANT D'AMELIORER LA STABILITE ET LA CAPACITE DE SYSTEMES CDMA A CADENCE DE TRANSMISSION MOYENNE
Publication
Application
Priority
- US 0115382 W 20010511
- US 57020900 A 20000512
Abstract (en)
[origin: WO0189099A2] A novel method and apparatus for achieving optimum capacity and stability in IS-95-B based medium data rate systems. Each user served by a base station is allocated a constant portion of available transmission power. A data are transmitted to each user at this allocated transmission power and a data rate is varied in accordance with the user's channel condition. This strategy removes the variation in transmission power when a user switches between a maximum and minimum rate, thus increasing stability and capacity of the system. The capacity is further increased by allocating a constant portion of a total available transmission power of a base station is allocated to a power for data transmission power for data transmission on a fundamental forward channel and a power for transmission on supplemental forward channels. Each user is allocated one fundamental channel. Rate of transmission of data to a user is varied by allocating supplemental forward channels based on the RF conditions of a communication link and the required data rate of each of the user. The allocation is controlled by a scheduling method. In another aspect of the invention the base station, transmitting on a fixed power is allowed to gradually adjust this fixed power to allow changes in a long term data throughput.
IPC 1-7
IPC 8 full level
H04B 7/005 (2006.01); H04B 7/26 (2006.01); H04J 13/00 (2011.01); H04W 52/26 (2009.01); H04W 52/34 (2009.01)
CPC (source: EP KR)
H04W 52/267 (2013.01 - EP KR); H04W 52/34 (2013.01 - KR); H04W 52/346 (2013.01 - EP); H04W 72/0473 (2013.01 - KR)
Citation (search report)
See references of WO 0189099A2
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 0189099 A2 20011122; WO 0189099 A3 20020718; AU 6308201 A 20011126; CN 1636327 A 20050706; EP 1281244 A2 20030205; JP 2004501549 A 20040115; KR 100854201 B1 20080826; KR 20020097262 A 20021231; TW 545001 B 20030801
DOCDB simple family (application)
US 0115382 W 20010511; AU 6308201 A 20010511; CN 01812323 A 20010511; EP 01937334 A 20010511; JP 2001585412 A 20010511; KR 20027015116 A 20021111; TW 90111298 A 20010615