Simplified quality indicator bit test procedures

• US 20020064133A1
• Filed: 03/30/2001
• Published: 05/30/2002
• Est. Priority Date: 10/11/2000
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Butsumyo, Vince Ryo, Chen, Tao, Aydin, Levent
• Granted Patent: US 6,735,216 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04W 52/18 TPC being performed according to specific parameters
• CPC Class Codes: H04W 52/26 using transmission rate or quality of service QoS [Quality of Service]

Abstract

In a code division multiple access communication system, a method and apparatus provide for an efficient testing of operating behavior of a quality indicator bit. The method and the accompanying apparatus include configuring a receiver to expect to receive a communication channel at a full data rate, and transmitting a signal from a transmitter to the receiver. The signal is carrying the communication channel at a data rate other than said full data rate, and at a power level for receiving at the full data rate. Consequently, the receiver fails to receive the communication channel at the full data rate. A received signal to noise ratio of the received signal at the receiver is determined. A value of the quality indicator bit is determined based on the determined signal to noise ratio. The determined value of the quality indicator bit is communicated to the transmitter.

Claims

1. In a code division multiple access communication system, a method for determining operating behavior of a quality indicator bit comprising:

a) configuring a receiver to expect to receive a communication channel at a full data rate;

b) transmitting a signal from a transmitter to said receiver, wherein said signal is carrying said communication channel at a data rate other than said full data rate, and at a power level for receiving at said full data rate;

c) failing to receive at said receiver said communication channel at said full data rate;

d) determining received signal to noise ratio of said signal at said receiver;

e) determining a value of said quality indicator bit based on said determined signal to noise ratio;

f) communicating to said transmitter said determined value of said quality indicator bit.

2. The method as recited in claim 1 further comprising:

repeating steps (b)-(f).

3. The method as recited in claim 1 further comprising:

determining said operating behavior of said quality indicator bit based on said communicated value of said quality indicator bit.

4. The method as recited in claim 1 wherein said determining operating behavior of said quality indicator bit is for determining behavior of said quality indicator bit in a forward dedicated control channel in said communication system.

5. The method as recited in claim 1 wherein said communication channel is a forward dedicated channel.

6. The method as recited in claim 1 wherein said receiver is associated with a mobile station, and said transmitter associated with a base station in said communication system.

7. The method as recited in claim 1 wherein said full data rate is at one of 9600 and 14400 bit per second data rate, and said other than the full rate is at one of 1500 and 1800 bit per second data rate.

8. The method as recited in claim 1 wherein said power level for receiving at said full data rate is at a power level corresponding to a power level used at a power control sub-channel.

9. In a code division multiple access communication system, an apparatus for determining behavior of a quality indicator bit comprising:

a receiver configured for expecting to receive at a full data rate;

a first transmitter configured for transmitting a signal to said receiver at a data rate other than said full data rate, and at a power level for receiving at said full data rate;

a controller at said receiver configured for detecting failure to receive at said receiver said signal at said full rate;

wherein said receiver in communication with said controller further configured for determining received signal to noise ratio of said signal at said receiver, and determining a value of said quality indicator bit based on said determined signal to noise ratio;

a second transmitter configured for communicating to said first transmitter said determined value of said quality indicator bit.

10. The apparatus as recited in claim 9 wherein said determining behavior of said quality indicator bit is for determining behavior of said quality indicator bit in a forward dedicated control channel in said communication system.

11. The apparatus as recited in claim 9 wherein said receiver is associated with a mobile station, and said first transmitter associated with a base station, and said second transmitter associated with said mobile station in said communication system.

13. The method as recited in claim 12 further comprising:

checking a received Quality Indicator Bit at the base station against the corresponding frames received at the mobile station for at least 100 frames.

14. The method as recited in claim 12 further comprising:

alternately enabling and disabling the transmission of a frame with power control bits only on the Forward Dedicated Control Channel.

15. The method as recited in claim 12 further comprising:

expecting to receive said Quality Indicator Bit in a pattern following the sent frame pattern of alternating ‘

0 ’

and ‘

1’

for said good and bad frames.

16. The method as recited in claim 14 further comprising:

expecting to receive said Quality Indicator Bit in a pattern following the sent frame pattern of alternating ‘

0 ’

and ‘

1’

for said enabling and disabling the transmission of frames.

12. A method in a communication system comprising:

connecting a base station and an AWGN generator to a mobile station antenna connector;

for each band class that the mobile station supports, configuring the mobile station to operate in a supported band class, and a radio configuration;

setting up a call using Dedicated Control Channel; and

sending alternating good and bad frames with data;

wherein the good frames are sent from the base station at a 9600 or 14400 bps data rate, and the bad frames are sent from the base station in at least one of a first and second way, wherein said first way includes communication at the 1500 or 1800 bps rates as in the Forward Fundamental Channel, and said second way includes communication at the 9600 or 14400 bps rate using a different radio configuration from the configured radio configuration under test.