Method and apparatus for controlling power in a variable rate communication system

In a variable rate communication system wherein a first communication device for the transmission of a data packet of variable rate data in a data frame of a predetermined data capacity to a second communication device wherein when said data packet is less than said data capacity generating repeated versions of bits in said data packet and providing a first version of said data packet bits and said repeated versions of said data packet bits in said data frame and wherein in a transmission power for transmitting said data frame is scaled in accordance with said data rate, a system for adjusting said transmission power of said first communication device comprising:

• data source means for generating frames of data at a variable data rate wherein said frames of data are generated in accordance with a set of allowed transition rates;
• receiver means for receiving a power control signal;
• control processor means for determining a power adjustment signal in accordance with said power control signal;
• and
• transmitter means responsive to said power adjustment signal, for transmitting each of said frames of data at a corresponding predetermined power level.

In a variable rate communication system wherein a first communication device for the transmission of a data packet of variable rate data in a data frame of a predetermined data capacity to a second communication device wherein when said data packet is less than said data capacity generating repeated versions of bits in said data packet and providing a first version of said data packet bits and said repeated versions of said data packet bits in said data frame and wherein in a transmission power for transmitting said data frame is scaled in accordance with said data rate, a system for controlling said transmission power of said first communication device at said second communication device comprising:

• receiver means for receiving said data frame;
• power measurement means for measuring power of said received data frame;
• comparison means for comparing said measured power against a set of threshold values wherein each threshold value of said set of threshold values corresponds to a different rate hypothesis of a set of rate hypotheses to provide a power control signal wherein said power control signal is indicative of a power adjustment command for a rate hypothesis and wherein said rate hypothesis is selected in accordance with the probability of said data frame being of a rate equal to said rate hypothesis;
• and
• transmitter means for transmitting said power control signal.

In a variable rate communication system wherein a first communication device for the transmission of a data packet of variable rate data in a data frame of a predetermined data capacity to a second communication device wherein when said data packet is less than said data capacity generating repeated versions of bits in said data packet and providing a first version of said data packet bits and said repeated versions of said data packet bits in said data frame and wherein in a transmission power for transmitting said data frame is scaled in accordance with said data rate, a system for adjusting said transmission power of said first communication device comprising:

• receiver means for receiving a power control signal for a rate hypothesis;
• control processor means for determining a power adjustment signal in accordance with said power control signal and with a predetermined rate hypothesis format determining the rate of said rate hypothesis and wherein said rate hypothesis format is determined in accordance with the data frame having been transmitted at a rate equal to the rate hypothesis to provide a transmitter adjustment signal;
• and
• transmitter means responsive to said transmitter adjustment signal, for transmitting said data frame at a predetermined power level.

In a variable rate communication system wherein a first communication device for the transmission of a data packet of variable rate data in a data frame of a predetermined data capacity to a second communication device wherein when said data packet is less than said data capacity generating repeated versions of bits in said data packet and providing a first version of said data packet bits and said repeated versions of said data packet bits in said data frame and wherein in a transmission power for transmitting said data frame is scaled in accordance with said data rate, a method for controlling said transmission power of said first communication device at said second communication device comprising the steps of:

• receiving said data frame;
• measuring power of said received data frame;
• comparing said measured power against a set of threshold values wherein each threshold value of said set of threshold values corresponds to a different rate hypothesis of a set of rate hypotheses determined in accordance with a set of allowed rate transitions to provide a power control signal;
• and
• transmitting said power control signal.

In a variable rate communication system wherein a first communication device for the transmission of a data packet of variable rate data in a data frame of a predetermined data capacity to a second communication device wherein when said data packet is less than said data capacity generating repeated versions of bits in said data packet and providing a first version of said data packet bits and said repeated versions of said data packet bits in said data frame and wherein in a transmission power for transmitting said data frame is scaled in accordance with said data rate, a method for adjusting said transmission power of said first communication device comprising the steps of:

• determining a current data rate of a plurality of variable data rates in accordance with a set of allowed transition rates;
• generating frames of data at said current data rate;
• receiving a power control signal;
• determining a power adjustment signal in accordance with said power control signal;
• determining a transmit power level in response to said power adjustment signal;
• and
• transmitting said frames of data at said power level.

In a variable rate communication system wherein a first communication device for the transmission of a data packet of variable rate data in a data frame of a predetermined data capacity to a second communication device wherein when said data packet is less than said data capacity generating repeated versions of bits in said data packet and providing a first version of said data packet bits and said repeated versions of said data packet bits in said data frame and wherein in a transmission power for transmitting said data frame is scaled in accordance with said data rate, a method for controlling said transmission power of said first communication device at said second communication device comprising the steps of:

• receiving said data frame;
• measuring power of said received data frame;
• comparing said measured power against a set of threshold values wherein each threshold value of said set of threshold values corresponds to a different rate hypothesis of a set of rate hypotheses to provide a power control signal wherein said power control signal is indicative of a power adjustment command for a rate hypothesis and wherein said rate hypothesis is selected in accordance with the probability of said data frame being of a rate equal to said rate hypothesis;
• transmitting said power control signal.

In a variable rate communication system wherein a first communication device for the transmission of a data packet of variable rate data in a data frame of a predetermined data capacity to a second communication device wherein when said data packet is less than said data capacity generating repeated versions of bits in said data packet and providing a first version of said data packet bits and said repeated versions of said data packet bits in said data frame and wherein in a transmission power for transmitting said data frame is scaled in accordance with said data rate, a method for adjusting said transmission power of said first communication device comprising the steps of:

• receiving a power control signal for a rate hypothesis;
• determining a power adjustment signal in accordance with said power control signal and with a predetermined rate hypothesis format determining the rate of said rate hypothesis and wherein said rate hypothesis format is determined in accordance with the data frame having been transmitted at a rate equal to the rate hypothesis to provide a transmitter adjustment signal;
• determining a power level in response to said transmitter adjustment signal;
• and
• transmitting said data frame at said power level.

In a variable rate communication system wherein a first communication device for the transmission of a data packet of variable rate data in a data frame of a predetermined data capacity to a second communication device wherein when said data packet is less than said data capacity generating repeated versions of bits in said data packet and providing a first version of said data packet bits and said repeated versions of said data packet bits in said data frame and wherein in a transmission power for transmitting said data frame is scaled in accordance with said data rate, a system for controlling said transmission power of said first communication device at said second communication device comprising:

• a receiver for receiving said data frame and having an output;
• a power measurement circuit for measuring power of said received data frame, and having an input coupled to said receiver output and having an output;
• a comparison circuit having a first input coupled to said power measurement circuit output and having a second input for receiving a set of threshold values wherein each threshold value of said set of threshold values corresponds to a different rate hypothesis of a set of rate hypotheses determined in accordance with a set of allowed rate transitions and having an output to provide a power control signal in response to a comparison of said measured power value to said set of threshold values;
• and
• a transmitter having an input for receiving said power control signal, said transmitter for transmitting said power control signal.

In a variable rate communication system wherein a first communication device for the transmission of a data packet of variable rate data in a data frame of a predetermined data capacity to a second communication device wherein when said data packet is less than said data capacity generating repeated versions of bits in said data packet and providing a first version of said data packet bits and said repeated versions of said data packet bits in said data frame and wherein in a transmission power for transmitting said data frame is scaled in accordance with said data rate, a system for adjusting said transmission power of said first communication device comprising:

• a variable rate data source for generating frames of data at a variable data rate wherein said frames of data are generated in accordance with a set of allowed transition rates and having an output;
• a receiver having an input for receiving a power control signal and having an output;
• a control processor for determining a power adjustment signal in response to said power control signal and having an input for receiving said power control signal and having an output;
• and
• a transmitter responsive to said power adjustment signal, having a first input coupled to said a variable rate data source output and having a second input coupled to said control processor output for transmitting each of said frames of data at a corresponding predetermined power level.