Transmitter-receiver, and method for controlling transmission power of the same

A transmission/reception apparatus comprising:

• detecting means for detecting a received quality of a received signal;
• reading means for reading a symbol and an amplitude of a TPC bit in the received signal;
• control means for multiplexing the TPC bit with a transmission signal and setting an amplitude of said transmission signal for each bit;
• and
• transmitting means for transmitting said transmission signal with the amplitude set in said control means,
• wherein said general amplitude setting means obtains an increase or decrease amount from an output from said amplitude reading means, and sets, as the amplitude of a signal other than the TPC bit, a value obtained by adding or subtracting said increase or decrease amount to or from an amplitude at a previous transmission time based on an output from said symbol determining means, and said TPC bit amplitude setting means sets, as the amplitude of the TPC bit, a value obtained by multiplying the amplitude of the signal other than the TPC bit by an amount from said ratio determining means.

A transmission/reception apparatus comprising:

• detecting means for detecting a received quality of a received signal;
• reading means for reading a symbol and an amplitude of a TPC bit in the received signal;
• control means for multiplexing the TPC bit with a transmission signal and setting an amplitude of said transmission signal for each bit;
• and
• transmitting means for transmitting said transmission signal with the amplitude set in said control means,
• wherein said detecting means comprises measuring means for measuring a SIR of the received signal;
• storage means for storing a reference SIR;
• difference calculating means for calculating a difference between a measured SIR and the reference SIR;
• and ratio calculating means for obtaining a ratio of the measured SIR and the reference SIR,
• wherein said ratio calculating means converts a calculated ratio into an increasing function to output, and
• wherein said ratio calculating means converts the calculated ratio into the increasing function by a calculation using a log and a square root.

A transmission/reception apparatus comprising:

• recognizing means for recognizing a compressed mode for decreasing a spreading factor of a signal;
• reading means for reading a symbol and an amplitude of a transmit power control signal in a received signal;
• and
• transmit power control means for performing transmit power control for the compressed mode at the time of the compressed mode, while performing transmit power control based on the symbol and the amplitude of said transmit power control signal at the time the compressed mode is cancelled.

A transmit power control method comprising:

• detecting step of detecting a received quality of a received signal;
• reading step of reading a symbol and an amplitude of a TPC bit in the received signal;
• control step of multiplexing the TPC bit with a transmission signal and setting an amplitude of said transmission signal for each bit;
• and
• transmitting step of transmitting said transmission signal with the amplitude set in said control step,
• wherein said control step comprises a symbol setting step of setting the symbol of the TPC bit in the transmission symbol;
• a TPC bit amplitude setting step of setting the amplitude of the TPC bit in the transmission signal;
• and a general amplitude setting step of setting the amplitude of a bit other than the TPC bit in the transmission signal, and
• wherein said symbol setting step comprises the step of setting the symbol using an output in said difference calculating step, and said TPC bit amplitude setting step comprises the step of setting the amplitude using an output from said ratio calculation step.

A transmit power control method comprising:

• detecting step of detecting a received quality of a received signal;
• reading step of reading a symbol and an amplitude of a TPC bit in the received signal;
• control step of multiplexing the TPC bit with a transmission signal and setting an amplitude of said transmission signal for each bit;
• and
• transmitting step of transmitting said transmission signal with the amplitude set in said control step,
• wherein said control step comprises a symbol setting step of setting the symbol of the TPC bit in the transmission symbol;
• a TPC bit amplitude setting step of setting the amplitude of the TPC bit in the transmission signal;
• and a general amplitude setting step of setting the amplitude of a bit other than the TPC bit in the transmission signal, and
• wherein said general amplitude setting step comprises the steps of obtaining an increase or decrease amount from an output in said amplitude reading step;
• setting, as the amplitude of the signal other than the TPC bit, a value obtained by adding or subtracting said increase or decrease amount to or from an amplitude at a previous transmission time based on an output in said symbol determining step;
• and setting, as the amplitude of the TPC bit, a value obtained by multiplying the amplitude of the signal other than the TPC bit by an amount in said ratio determining step.

A transmission/reception apparatus, comprising:

• a detector that detects a received quality of a received signal;
• a reader that reads a symbol of a transmit power control bit and a ratio of an amplitude of a signal other than the transmit power control bit to an amplitude of the transmit power control bit in the received signal;
• a transmit power controller that determines whether to increase or decrease a transmit power based on said symbol and determines an amount of the increase or decrease based on said amplitude ratio;
• a transmit power control bit generator that generates a generated transmit power control bit based on the received quality;
• a controller that multiplexes the generated transmit power control bit on a transmission signal and sets an amplitude of said transmission signal on a per bit basis;
• and
• a transmitter that transmits said transmission signal with said amplitude set in said controller.

The transmission/reception apparatus according to claim wherein said controller further comprises:

• a symbol setter that sets the symbol of the generated transmit power control bit;
• a transmit power control bit amplitude setter that sets the amplitude of the generated transmit power control bit;
• and
• a general amplitude setter that sets the amplitude of other bits than the generated transmit power control bit in the transmission signal.

A transmission/reception apparatus, comprising:

• a recognizer that recognizes a compressed mode in which a spreading factor of a signal is reduced;
• a reader that reads a symbol of a transmit power control bit and a ratio of an amplitude of a signal other than the transmit power control bit to an amplitude of the transmit power control bit in a received signal;
• and
• a transmit power controller that performs, at the time of the compressed mode, a transmit power control for the compressed mode, and that determines, when the compressed mode is cancelled, to increase or decrease a transmit power value based on the symbol and determines an amount of the increase or decrease based on the amplitude ratio.

A communication terminal apparatus comprising a transmission/reception apparatus, the communication terminal apparatus comprising:

• a detector that detects a received quality of a received signal;
• a reader that reads a symbol of a transmit power control bit and a ratio of an amplitude of a signal other than the transmit power control bit to an amplitude of the transmit power control bit in the received signal;
• a transmit power controller that determines whether to increase or decrease a transmit power based on said symbol and determines an amount of the increase or decrease based on said amplitude ratio;
• a transmit power control bit generator that generates a generated transmit power control bit based on said received quality;
• a controller that multiplexes the generated transmit power control bit on a transmission signal and sets an amplitude of said transmission signal on a per bit basis;
• and
• a transmitter that transmits said transmission signal with the amplitude set in said controller.

A base station apparatus comprising a transmission/reception apparatus, said base station apparatus comprising:

• a detector that detects a received quality of a received signal;
• a reader that reads a symbol of a transmit power control bit and a ratio of an amplitude of a signal other than the transmit power control bit to an amplitude of the transmit power control bit in the received signal;
• a transmit power controller that determines whether to increase or decrease a transmit power based on said symbol and determines an amount of the increase or decrease based on said amplitude ratio;
• a transmit power control bit generator that generates a generated transmit power control bit based on the received quality;
• a controller that multiplexes the generated transmit power control bit on a transmission signal and sets an amplitude of said transmission signal on a per bit basis;
• and
• a transmitter that transmits said transmission signal with the amplitude set in said controller.

A transmit power control method, comprising:

• detecting a received quality of a received signal;
• reading a symbol of a transmit power control bit and a ratio of an amplitude of a signal other than the transmit power control bit to an amplitude of the transmit power control bit in the received signal;
• performing a transmit power control for determining whether to increase or decrease a transmit power based on said symbol and determines an amount of the increase or decrease based on said amplitude ratio;
• generating a generated transmit power control bit based on the received quality;
• performing a control for multiplexing the generated transmit power control bit on a transmission signal and setting an amplitude of said transmission signal on a per bit basis;
• and transmitting said transmission signal with the amplitude in said control step.