Method and apparatus for establishing non-standard data rates in a wireless communication system

• US 7,130,362 B2
• Filed: 11/16/2005
• Issued: 10/31/2006
• Est. Priority Date: 12/18/2001
• Status: Expired due to Term

• Current Assignee: VIXS Incorporated
• Original Assignee: VIXS Incorporated
• Inventors: Girardeau, James, Wallace, Bradley, Aardema, Christopher Alan
• Primary Examiner(s): Bayard, Emmanuel
• Application Number:
  US11/281,013
• Publication Number:
  US 20060067418A1
• Time in Patent Office: 349 Days
• Field of Search: 375/225, 375/316, 375/340, 375/341, 375/141, 375/146, 370/430
• US Class Current: 375/340
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0015 characterised by the adaptation strategy
• CPC Class Codes: H04L 1/0046 Code rate detection or code type detection H04L1/0038 takes precedence; detection of the data rate H04L25/0262; for packet format H04L1/0091
• CPC Class Codes: H04L 1/0068 by puncturing

Abstract

A wireless communication device capable of receiving data using non-standard data includes a receiver section, a demodulation mapping module, a decoding module, and a rate determination module. The receiver section is operably coupled to convert a radio frequency signal into a digital signal. The demodulation mapping module is operably coupled to demodulate the digital signal to produce demodulated data. The decoding module is operably coupled to decode the demodulated data based on the coding rate to produce decoded data. The rate determination module is operably coupled to determine the coding rate from at least one of the digital signal and the demodulated data, wherein the coding rate is one of a plurality of standard coding rates or a non-standard coding rate that is selected for a given transmission.

Claims

1. A wireless communication device capable of receiving data using non-standard data rates in a wireless communication system, the wireless communication device comprises:

receiver section operably coupled to convert a radio frequency signal into a digital signal;

demodulation mapping module operably coupled to demodulate the digital signal to produce demodulated data;

rate determination module operably coupled to determine a standard coding rate, when the radio frequency signal was modulated at one of a plurality of standard coding rates and to determine a non-standard coding rate when the radio frequency signal was modulated at the non-standard coding rate;

decoding module operably coupled to decode the demodulated data based on the standard coding rate to produce decoded data when the radio frequency signal was modulated at one of a plurality of standard coding rates, and to decode the demodulated data based on the non-standard coding rate to produce decoded data when the radio frequency signal was modulated at the non-standard coding rate.

2. The wireless communication device of claim 1 further comprises:

processing module; and

memory operably coupled to the processing module, wherein the memory includes operational instructions that cause the processing module to;

function as the demodulation mapping module to demodulate the digital signal based on a modulation mode; and

function as the rate determination module to determined the modulation mode from at least one of the digital signal and the demodulated data, wherein the demodulation mode is one of a plurality of standard demodulation modes or a non-standard demodulation mode that is selected for the given transmission.

3. The wireless communication device of claim 1, wherein the rate determination module is further operably coupled to:

interpret a message indicating the non-standard data rate.

4. The wireless communication device of claim 1, wherein the rate determination module is further operably coupled to change at least one of:

the non-standard code that corresponds to the non-standard data rate; and

a constellation decoding to a non-standard constellation decoding scheme with the demodulation mapping module.

5. The wireless communication device of claim 1 further comprises:

receiving the radio frequency signal in accordance with a standard specified data rate for a given data transmission;

determining whether data rate of the given data transmission can be adjusted from the standard specified data rate by a non-standard data rate adjustment; and

when the data rate of the given data transmission can be adjusted from the standard specified data rate by a non-standard data rate adjustment, indicating the non-standard data rate adjustment.

6. The wireless communication device of claim 5, wherein the receiving the radio frequency signal further comprises:

receiving the radio frequency signal in accordance with a first standard data rate of a plurality of standard data rates for the given transmission;

determining whether the first standard data rate provides an acceptable error rate for the given transmission;

when the first standard data rate provides an acceptable error rate, utilizing the first standard data rate as the standard specified data rate; and

when the first standard data rate does not provide an acceptable error rate, indicating another standard data rate of the plurality of standard data rates until the another standard data rate provides the acceptable error rate.

7. The wireless communication device of claim 6, wherein the first standard data rate further comprises at least one of:

a lowest standard data rate of the plurality of standard data rates;

a highest standard data rate of the plurality of standard data rates;

an arbitrary one of the plurality of standard data rates;

the first standard data rate based on a histogram of previously used standard data rates of a wireless communication device of the given data transmission; and

the first data rate based on standard data rates utilized to support other data transmissions.

8. The wireless communication device of claim 6 further comprises:

determining whether the first standard data rate provides an acceptable error rate by;

determining whether an error indication is less than a lower error threshold;

when the first standard data rate does not provide an acceptable error rate, indicating the another standard data rate of the plurality of standard data rates to have a greater data rate than the first standard data rate.

9. The wireless communication device of claim 6 further comprises:

determining whether the first standard data rate provides an acceptable error rate by;

determining whether an error indication is greater than an upper error threshold;

when the first standard data rate does not provide an acceptable error rate, selecting the another standard data rate of the plurality of standard data rates to have a lower data rate than the first standard data rate.

10. The wireless communication device of claim 6, wherein the determining whether the data rate of the given data transmission can be adjusted from the standard specified data rate by a non-standard data rate adjustment further comprises:

interpreting an error indication with respect to at least one of;

a lower error threshold and an upper error threshold;

determining error margin between the error indication and the at least one of the lower and upper error thresholds; and

determining the non-standard data rate adjustment based on the error margin.

11. The wireless communication device of claim 10, wherein the determining the non-standard data rate adjustment further comprises at least one of:

incrementing the data rate of the given data transmission by at least one non-standard data rate increment based on the error margin; and

calculating the non-standard data rate adjustment as a function of at least one of;

the error margin, the standard specified data rate, the lower error threshold, the upper error threshold, and the error indication.

12. A wireless communication device capable of receiving data using non-standard data rates in a wireless communication system, the wireless communication device comprises:

receiver section operably coupled to;

receive the radio frequency signal in accordance with a standard specified data rate for a given data transmission;

determine whether data rate of the given data transmission can be adjusted from the standard specified data rate by a non-standard data rate adjustment;

when the data rate of the given data transmission can be adjusted from the standard specified data rate by a non-standard data rate adjustment, indicating the non-standard data rate adjustment; and

convert a radio frequency signal into a digital signal;

demodulation mapping module operably coupled to demodulate the digital signal to produce demodulated data;

decoding module operably coupled to decode the demodulated data based on a coding rate to produce decoded data; and

rate determination module operably coupled to determine the coding rate from at least one of the digital signal and the demodulated data, wherein the coding rate is one of a plurality of standard coding rates or a non-standard coding rate that is selected for a given transmission.

13. The wireless communication device of claim 12 further comprises:

processing module; and

memory operably coupled to the processing module, wherein the memory includes operational instructions that cause the processing module to;

function as the demodulation mapping module to demodulate the digital signal based on a modulation mode; and

function as the rate determination module to determined the modulation mode from at least one of the digital signal and the demodulated data, wherein the demodulation mode is one of a plurality of standard demodulation modes or a non-standard demodulation mode that is selected for the given transmission.

14. The wireless communication device of claim 12, wherein the rate determination module is further operably coupled to change at least one of:

the coding rate to a non-standard code that corresponds to the non-standard data rate; and

a constellation decoding to a non-standard constellation encoding scheme with the demodulation mapping module.

15. The wireless communication device of claim 12, wherein the receiving the radio frequency signal further comprises:

receiving the radio frequency signal in accordance with a first standard data rate of a plurality of standard data rates for the given transmission;

determining whether the first standard data rate provides an acceptable error rate for the given transmission;

when the first standard data rate provides an acceptable error rate, utilizing the first standard data rate as the standard specified data rate; and

when the first standard data rate does not provide an acceptable error rate, indicating another standard data rate of the plurality of standard data rates until the another standard data rate provides the acceptable error rate.

16. The wireless communication device of claim 15, wherein the first standard data rate further comprises at least one of:

a lowest standard data rate of the plurality of standard data rates;

a highest standard data rate of the plurality of standard data rates;

an arbitrary one of the plurality of standard data rates;

the first standard data rate based on a histogram of previously used standard data rates of a wireless communication device of the given data transmission; and

the first data rate based on standard data rates utilized to support other data transmissions.

17. The wireless communication device of claim 15 further comprises:

determining whether the first standard data rate provides an acceptable error rate by;

determining whether an error indication is less than a lower error threshold;

when the first standard data rate does not provide an acceptable error rate, indicating the another standard data rate of the plurality of standard data rates to have a greater data rate than the first standard data rate.

18. The wireless communication device of claim 15 further comprises:

determining whether the first standard data rate provides an acceptable error rate by;

determining whether an error indication is greater than an upper error threshold;

when the first standard data rate does not provide an acceptable error rate, selecting the another standard data rate of the plurality of standard data rates to have a lower data rate than the first standard data rate.

19. The wireless communication device of claim 15, wherein the determining whether the data rate of the given data transmission can be adjusted from the standard specified data rate by a non-standard data rate adjustment further comprises:

interpreting an error indication with respect to at least one of;

a lower error threshold and an upper error threshold;

determining error margin between the error indication and the at least one of the lower and upper error thresholds; and

determining the non-standard data rate adjustment based on the error margin.

20. The wireless communication device of claim 19, wherein the determining the non-standard data rate adjustment further comprises at least one of:

incrementing the data rate of the given data transmission by at least one non-standard data rate increment based on the error margin; and

calculating the non-standard data rate adjustment as a function of at least one of;

the error margin, the standard specified data rate, the lower error threshold, the upper error threshold, and the error indication.