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1. WO2000033476 - DATA TRANSMISSION WITHIN A SPREAD-SPECTRUM COMMUNICATION SYSTEM

Publication Number WO/2000/033476
Publication Date 08.06.2000
International Application No. PCT/US1999/028540
International Filing Date 02.12.1999
Chapter 2 Demand Filed 10.05.2000
IPC
H04J 11/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
11Orthogonal multiplex systems
H04L 1/00 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
CPC
H04J 13/0044
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
13Code division multiplex systems
0007Code type
004Orthogonal
0044OVSF [orthogonal variable spreading factor]
H04J 13/20
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
JMULTIPLEX COMMUNICATION
13Code division multiplex systems
16Code allocation
18Allocation of orthogonal codes
20having an orthogonal variable spreading factor [OVSF]
H04L 1/0002
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
1Arrangements for detecting or preventing errors in the information received
0001Systems modifying transmission characteristics according to link quality, e.g. power backoff
0002by adapting the transmission rate
Applicants
  • MOTOROLA INC. [US]/[US]
Inventors
  • FELIX, Kenneth, A.
  • CUDAK, Mark, C.
  • GHOSH, Amitava
Agents
  • HAAS, Kenneth, A.
Priority Data
09/204,70203.12.1998US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) DATA TRANSMISSION WITHIN A SPREAD-SPECTRUM COMMUNICATION SYSTEM
(FR) TRANSMISSION DE DONNEES DANS UN SYSTEME DE COMMUNICATION A SPECTRE ETALE
Abstract
(EN)
Remote units (113) having large amounts of data to transmit will be dynamically assigned Orthogonal Variable Spreading Factor (OVSF) codes corresponding to higher data rates and remote units (113) with lower amounts of data to be transmitted will be assigned OVSF codes corresponding to lower data rates. Additionally, in an alternate embodiment of the present invention, once system interference becomes greater than a predetermined threshold, the data rate between the base station (100) and remote units (113) in communication with the base station (100) is reduced. The reduction of the data rate between the base station (100) and remote units (113) occurs by changing the current OVSF codes utilized by both the remote units (113) and the base station (100).
(FR)
Selon cette invention, les unités distantes (113) possédant des quantités importantes de données à transmettre se verront assigner des codes OVSF (facteur d'étalement variable orthogonal) qui correspondent à des débits de transmission plus élevés alors que les unités distantes (113) possédant des quantités moins importantes de données à transmettre se verront assigner des codes OVSF qui correspondent à des débits de transmission plus bas. En outre, dans un autre mode de réalisation de cette invention, une fois que l'interférence système dépasse un seuil prédéterminé, le débit de données entre la station de base (100) et les unités distantes (113) communiquant avec la station de base (100) est réduit. La réduction du débit de données entre la station de base et les unités distantes (113) se fait par le changement des codes OVSF courants utilisés par les unités distantes (113) comme par la station de base (100).
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