Title of Invention	A METHOD AND SYSTEM FOR PERFORMING TRANSMIT POWER CONTROL AT A SUBSCRIBER UNIT
Abstract	A novel and improved method for performing transmit power control is described. A signal is transmitted at a transmit power and includes a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitting at a pilot channel transmit power. The receive energy of the pilot channel is measured, and a decrease power control command is generating when the receive energy is greater than a receive energy threshold. If the receive energy is less than the receive energy threshold, an increase power control command is generated. The power control command is transmitted to the system generating the signal.

Title of Invention

A METHOD AND SYSTEM FOR PERFORMING TRANSMIT POWER CONTROL AT A SUBSCRIBER UNIT

Abstract

A novel and improved method for performing transmit power control is described. A signal is transmitted at a transmit power and includes a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitting at a pilot channel transmit power. The receive energy of the pilot channel is measured, and a decrease power control command is generating when the receive energy is greater than a receive energy threshold. If the receive energy is less than the receive energy threshold, an increase power control command is generated. The power control command is transmitted to the system generating the signal.

Full Text	a reverse link transmit power includes at least a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitted at a pilot channel transmit power. At a receive system the receive energy of the pilot channel is measured, and a decrease power control command is generating when the receive energy is greater than a receive energy threshold. If the receive energy is less than the receive energy threshold an increase power control command is generated. The power control command is transmitted to the system generating the reverse link signal. Accordingly, the present invention provides a method for performing transmit power control at a subscriber unit on a reverse link signal transmitted at a reverse link transmit power, wherein the reverse link signal has a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitted at a pilot channel transmit power, comprising the steps of: measuring at a base station a receive energy of the reverse link pilot channel; generating a power control command in accordance with a comparison of said receive energy measurement with an energy threshold, wherein said power control command comprises an increase or decrease command; receiving said power control command at said subscriber unit; examining said power control command at said subscriber unit to determine whether the command is to be applied to either the reverse link traffic channel, the reverse link pilot channel, or the entire reverse link signal; and selectively adjusting the transmit power of either the reverse link pilot channel, the reverse link traffic channel, or the entire reverse link signal in accordance with the examining step. The present invention also provides a system for performing transmit power control at a subscriber unit on a reverse link signal transmitted at a reverse link transmit power, wherein the reverse link signal has a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitted at a pilot channel transmit power, comprising: power control system that measures at a base station a receive energy of the reverse link pilot channel, for generating a power control command in accordance with a comparison of said receive energy measurement with an energy threshold, wherein said power control command comprises an increase or decrease command; receiver at said subscriber unit that receives said power control command; examination system that examines at said subscriber unit said power control command to determine whether the command is to be applied to either the reverse link traffic channel, the reverse link pilot channel, or the entire reverse link signal; and a power controller that selectively adjusts the transmit power of either the reverse link pilot channel, the reverse link traffic channel, or the entire reverse link signal in accordance with said examination by said examination system. The features, objects, and advantages of the present invention will become more apparent from the detailed description set forth below when taken in conjunction with the drawings in which like reference characters identify correspondingly throughout and wherein: FIG. 1 is a block diagram of a cellular telephone system; FIG. 2 is a block diagram of a subscriber unit or cellular telephone configured in accordance with one embodiment of the invention; and FIG 3 is a block diagram of a base station configured in accordance with an exemplary embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 is a block diagram of a subscriber unit or cellular telephone configured with one embodiment of the invention. During operation encoder 12 convolutionally encodes user data 10 to generate encoded symbols 14. User data 10 is typically vocoded voice information provided at a variable data rate, although any type of digital data may be transmitted. The user data is processed in 20 ms increments, or frames, in which the amount of data contained in each frame varies in response to changes in the data rate. Traffic channel modulator 16 modulates encoded symbols 14 with a traffic channel code to generate traffic channel symbols 18. Additionally, traffic channel modulator 16 increases or decreases the gain of the traffic channel in response to channel gain adjust command 62 as described below. The gain of the traffic channel is further adjusted by traffic channel modulator 16 in response to changes in the amount of data being transmitted during each 20 ms frame WE CLAIM : 1. A method for performing transmit power control at a subscriber unit on a reverse link signal transmitted at a reverse link transmit power, wherein the reverse link signal has a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitted at a pilot channel transmit power, comprising the steps of: measuring at a base station a receive energy of the reverse link pilot channel; generating a power control command in accordance with a comparison of said receive energy measurement with an energy threshold, wherein said power control command comprises an increase or decrease command; receiving said power control command at said subscriber unit; examining said power control command at said subscriber unit to determine whether the command is to be applied to either the reverse link traffic channel, the reverse link pilot channel, or the entire reverse link signal; and selectively adjusting the transmit power of either the reverse link pilot channel, the reverse link traffic channel, or the entire reverse link signal in accordance with the examining step. 2. The method as claimed in claim 1 comprising the step of transmitting said power control command via a forward link signal. 3. The method as claimed in claim 1, wherein the reverse link traffic channel is received at a set of power levels and a corresponding set of transmission rates. 4. The method as claimed in claim 1, wherein the step of measuring and the step of generating are continuously performed throughout transmission of said reverse link traffic channel. 5. The method as claimed in claim 1, wherein the step of selectively adjusting is also performed in response to a measurement of a forward link receive energy. 6. A system for performing transmit power control at a subscriber unit on a reverse link signal transmitted at a reverse link transmit power, wherein the reverse link signal has a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitted at a pilot channel transmit power, comprising: power control system that measures at a base station a receive energy of the reverse link pilot channel, for generating a power control command in accordance with a comparison of said receive energy measurement with an energy threshold, wherein said power control command comprises an increase or decrease command; receiver at said subscriber unit that receives said power control command; examination system that examines at said subscriber unit said power control command to determine whether the command is to be applied to either the reverse link traffic channel, the reverse link pilot channel, or the entire reverse link signal; and a power controller that selectively adjusts the transmit power of either the reverse link pilot channel, the reverse link traffic channel, or the entire reverse link signal in accordance with said examination by said examination system. 7. The system as claimed in claim 6, wherein said receiver receives said power control command via a forward link signal. 8. The system as claimed in claim 6, wherein said base station receives the reverse link traffic channel at a set of power levels and a corresponding set of transmission rates. 9. The system as claimed in claim 6, wherein said power control system continuously measures said receive energy of the reverse link pilot channel throughout transmission of said reverse link traffic channel, and continuously generates said power control command throughout transmission of said reverse link traffic channel. 10. The system as claimed in claim 6, wherein said power controller selectively adjusts the transmit power of either the reverse link pilot channel, the reverse link traffic channel, or the entire reverse link signal further in response to a measurement of a forward link receive energy. 11. A method for performing transmit power control at a subscriber unit substantially as herein described with reference to figures 2 and 3 of the accompanying drawings. 12. A system for performing transmit power control at a subscriber unit substantially as herein described with reference to figures 2 and 3 of the accompanying drawings.

Full Text

a reverse link transmit power includes at least a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitted at a pilot channel transmit power. At a receive system the receive energy of the pilot channel is measured, and a decrease power control command is generating when the receive energy is greater than a receive energy threshold. If the receive energy is less than the receive energy threshold an increase power control command is generated. The power control command is transmitted to the system generating the reverse link signal.
Accordingly, the present invention provides a method for performing transmit power control at a subscriber unit on a reverse link signal transmitted at a reverse link transmit power, wherein the reverse link signal has a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitted at a pilot channel transmit power, comprising the steps of: measuring at a base station a receive energy of the reverse link pilot channel; generating a power control command in accordance with a comparison of said receive energy measurement with an energy threshold, wherein said power control command comprises an increase or decrease command; receiving said power control command at said subscriber unit; examining said power control command at said subscriber unit to determine whether the command is to be applied to either the reverse link traffic channel, the reverse link pilot channel, or the entire reverse link signal; and selectively adjusting the transmit power of either the reverse link pilot channel, the reverse link traffic channel, or the entire reverse link signal in accordance with the examining step.
The present invention also provides a system for performing transmit power control at a subscriber unit on a reverse link signal transmitted at a

reverse link transmit power, wherein the reverse link signal has a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitted at a pilot channel transmit power, comprising: power control system that measures at a base station a receive energy of the reverse link pilot channel, for generating a power control command in accordance with a comparison of said receive energy measurement with an energy threshold, wherein said power control command comprises an increase or decrease command; receiver at said subscriber unit that receives said power control command; examination system that examines at said subscriber unit said power control command to determine whether the command is to be applied to either the reverse link traffic channel, the reverse link pilot channel, or the entire reverse link signal; and a power controller that selectively adjusts the transmit power of either the reverse link pilot channel, the reverse link traffic channel, or the entire reverse link signal in accordance with said examination by said examination system.
The features, objects, and advantages of the present invention will become more apparent from the detailed description set forth below when taken in conjunction with the drawings in which like reference characters identify correspondingly throughout and wherein:
FIG. 1 is a block diagram of a cellular telephone system;
FIG. 2 is a block diagram of a subscriber unit or cellular telephone configured in accordance with one embodiment of the invention; and
FIG 3 is a block diagram of a base station configured in accordance with an exemplary embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIG. 2 is a block diagram of a subscriber unit or cellular telephone configured with one embodiment of the invention. During operation encoder 12 convolutionally encodes user data 10 to generate encoded symbols 14. User data 10 is typically vocoded voice information provided at a variable data rate, although any type of digital data may be transmitted. The user data is processed in 20 ms increments, or frames, in which the amount of data contained in each frame varies in response to changes in the data rate.
Traffic channel modulator 16 modulates encoded symbols 14 with a traffic channel code to generate traffic channel symbols 18. Additionally, traffic channel modulator 16 increases or decreases the gain of the traffic channel in response to channel gain adjust command 62 as described below. The gain of the traffic channel is further adjusted by traffic channel modulator 16 in response to changes in the amount of data being transmitted during each 20 ms
frame

WE CLAIM :
1. A method for performing transmit power control at a subscriber unit on a reverse link signal transmitted at a reverse link transmit power, wherein the reverse link signal has a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitted at a pilot channel transmit power, comprising the steps of: measuring at a base station a receive energy of the reverse link pilot channel; generating a power control command in accordance with a comparison of said receive energy measurement with an energy threshold, wherein said power control command comprises an increase or decrease command; receiving said power control command at said subscriber unit; examining said power control command at said subscriber unit to determine whether the command is to be applied to either the reverse link traffic channel, the reverse link pilot channel, or the entire reverse link signal; and selectively adjusting the transmit power of either the reverse link pilot channel, the reverse link traffic channel, or the entire reverse link signal in accordance with the examining step.
2. The method as claimed in claim 1 comprising the step of transmitting said power control command via a forward link signal.
3. The method as claimed in claim 1, wherein the reverse link traffic channel is received at a set of power levels and a corresponding set of transmission rates.

4. The method as claimed in claim 1, wherein the step of measuring and the step of generating are continuously performed throughout transmission of said reverse link traffic channel.
5. The method as claimed in claim 1, wherein the step of selectively adjusting is also performed in response to a measurement of a forward link receive energy.
6. A system for performing transmit power control at a subscriber unit on a reverse link signal transmitted at a reverse link transmit power, wherein the reverse link signal has a traffic channel transmitted at a traffic channel transmit power, and a pilot channel transmitted at a pilot channel transmit power, comprising: power control system that measures at a base station a receive energy of the reverse link pilot channel, for generating a power control command in accordance with a comparison of said receive energy measurement with an energy threshold, wherein said power control command comprises an increase or decrease command; receiver at said subscriber unit that receives said power control command; examination system that examines at said subscriber unit said power control command to determine whether the command is to be applied to either the reverse link traffic channel, the reverse link pilot channel, or the entire reverse link signal; and a power controller that selectively adjusts the transmit power of either the reverse link pilot channel, the reverse link traffic channel, or the entire reverse link signal in accordance with said examination by said examination system.
7. The system as claimed in claim 6, wherein said receiver receives said power control command via a forward link signal.

8. The system as claimed in claim 6, wherein said base station receives the
reverse link traffic channel at a set of power levels and a corresponding
set of transmission rates.
9. The system as claimed in claim 6, wherein said power control system
continuously measures said receive energy of the reverse link pilot
channel throughout transmission of said reverse link traffic channel, and
continuously generates said power control command throughout
transmission of said reverse link traffic channel.
10. The system as claimed in claim 6, wherein said power controller
selectively adjusts the transmit power of either the reverse link pilot
channel, the reverse link traffic channel, or the entire reverse link signal
further in response to a measurement of a forward link receive energy.
11. A method for performing transmit power control at a subscriber unit
substantially as herein described with reference to figures 2 and 3 of the
accompanying drawings.
12. A system for performing transmit power control at a subscriber unit
substantially as herein described with reference to figures 2 and 3 of the
accompanying drawings.

Documents:

113-mas-1998- abstract.pdf

113-mas-1998- claims duplicate.pdf

113-mas-1998- claims original.pdf

113-mas-1998- correspondence others.pdf

113-mas-1998- correspondence po.pdf

113-mas-1998- description complete duplicate.pdf

113-mas-1998- drawings.pdf

113-mas-1998- form 1.pdf

113-mas-1998- form 26.pdf

113-mas-1998- form 3.pdf

113-mas-1998- form 4.pdf

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Patent Number

207796

Indian Patent Application Number

113/MAS/1998

PG Journal Number

26/2007

Publication Date

29-Jun-2007

Grant Date

27-Jun-2007

Date of Filing

19-Jan-1998

Name of Patentee

QUALCOMM INCORPORATED

Applicant Address

6455 LUSK BOULEVARD, SAN DIEGO, CALIFORNIA 92121.

Inventors:

#	Inventor's Name	Inventor's Address
1	SERGE WILLENEGGER	3425 LEBON DRIVE, #732, SAN DIEGO, CALIFORNIA 92122.
2	YU-CHEN YOU	9979 RIVERHEAD DRIVE, SAN DIEGO, CALIFORNIA 92129.
3	EDWARD G TIEDEMANN Jr.	4350 bromfield avenue, san diego, california 92122.
4	JOSEPH P ODENWALDER	14967 RANCHO REAL, DEL MAR, CALIFORNIA 92014.

PCT International Classification Number

H04B007/05

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	08/792,531	1997-01-31	U.S.A.