US6493563B1

5G,4G,3G,2G

Title

Method of controlling initial power ramp-up in CDMA systems by using short codes

Application Number:

US20000721034

Publication Date:

10-12-2002

Current Assignee:

INTERDIGITAL INC

Family ID:

24689247

Application Date:

22-11-2000

Declaring Company:

INTERDIGITAL INC

Publication Country:

US

Priority Date:

27-06-1996

View on Espacenet goto-link

Title

Method of controlling initial power ramp-up in CDMA systems by using short codes

Application Number:

US20000721034

Family ID:

24689247

Publication Country:

US

Publication Date:

10-12-2002

Application Date:

22-11-2000

Priority Date:

27-06-1996

Current Assignee:

INTERDIGITAL INC

Declaring Company:

INTERDIGITAL INC

View on Espacenet goto-link

Abstract  Abstract

A system and method of controlling transmission power during the establishment of a channel in a CDMA communication system utilize the transmission of a short code from a subscriber unit to a base station during initial power ramp-up. The short code is a sequence for detection by the base station which has a much shorter period than a conventional spreading code. The ramp-up starts from a power level that is guaranteed to be lower than the required power level for detection by the base station. The subscriber unit quickly increases transmission power while repeatedly transmitting the short code until the signal is detected by the base station. Once the base station detects the short code it sends an indication to the subscriber unit to cease increasing transmission power. The use of short codes limits power overshoot and interference to other subscriber stations and permits the base station to quickly synchronize to the spreading code used by the subscriber unit.

Note:

The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)

The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

Family member:related patents or applications that share a common priority or original filing.

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