Control information transmitting method, transmitter, and transmitting and receiving apparatus

A control information transmitting method of transmitting, to a communication partner, control symbols obtained by assigning control information for controlling transmission power to symbols of phase modulation, so as to control a transmission power of said communication partner, comprising the steps of:

• selecting as said control information for controlling transmission power, one of control information which indicates raising said transmission power of said communication partner, control information which indicates lowering said transmission power of said communication partner, and control information which includes contents of one control information previously sent to said communication partner and which indicates holding said transmission power of said communication partner, and
• transmitting to said communication partner said control symbols assigned to said control information selected in said step of selecting.

A control information transmitting method for transmitting, to a communication partner, control symbols obtained by assigning control information for controlling transmission power to symbols of phase modulation, so as to control the transmission power of said communication partner, said control information transmitting method comprising the steps of:

• using “n” band slots having a plurality of rectangular subcarriers for communication with said communication partner, providing “k” subcarriers for transmitting control symbols respectively in the band slots (wherein, n≧k} from among the “n” band slots, and assigning said control symbols one by one to said subcarriers for transmitting the control symbols.

A transmitter for transmitting, to a communication partner, control symbols obtained by assigning control information for controlling transmission power to symbols of phase modulation, so as to control the transmission power of said communication partner, said transmitter comprising:

• symbol producing means for producing said control symbols by using, as said control information, control information which indicates raising said transmission power of said communication partner, control information which indicates lowering said transmission power of said communication partner, and control information which includes contents of the control information previously sent to said communication partner and which indicates holding said transmission power of said communication partner, and for assigning one of said control information to said symbols;
• and
• transmitting means for transmitting said control symbols to said communication partner.

A transmitter for transmitting, to a communication partner, control symbols obtained by assigning control information for controlling transmission power to symbols of the phase modulation, so as to control the transmission power of said communication partner, said transmitter comprising:

• means for providing a plurality of rectangular subcarriers used to communicate with said communication partner, means for assigning said control symbols to the subcarriers, excluding both ends and a center of a transmission band, from among a plurality of said subcarriers, and means for transmitting subcarriers.

A transmitter for transmitting, to a communication partner, control symbols obtained by assigning control information for controlling transmission power to symbols of phase modulation, so as to control the transmission power of said communication partner, said transmitter comprising:

• means for using “n” band slots having a plurality of rectangular subcarriers for communication with said communication partner, means for respectively providing “k” subcarriers for transmitting control symbols in the band slots (wherein, n≧k) from among the “n” band slots, and means for assigning said control symbols one by one to said subcarriers and for transmitting the control symbols.

A transmitting and receiving apparatus for receiving, from a communication partner, control symbols obtained by assigning control information for controlling transmission power to symbols of phase modulation, so as to control a transmission power of the apparatus based on the control symbols, said transmitting and receiving apparatus comprising:

• means for using “n” band slots having a plurality of rectangular subcarriers for communication, when “k” subcarriers for transmitting control symbols are respectively provided in the band slots (where, n≧k) from among the “n” band slots, and means for assigning the same control symbols one by one to said subcarriers for transmitting the control symbols, wherein said control symbols are composed in accordance with a carrier to interference power ratio of each band slot to decode said control information from the composed control symbols, and then the transmission power of the apparatus is controlled based on the decoded control information.

A transmitting and receiving apparatus for receiving, from a communication partner, control symbols obtained by assigning control information for controlling transmission power to symbols of phase modulation, so as to control a transmission power of the apparatus based on the control information, said transmitting and receiving apparatus comprising:

• means for using “n” band slots having a plurality of rectangular subcarriers for communication, when “k” subcarriers for transmitting control symbols are respectively provided in the band slots (where, n≧k) from among the “n” band slots, and means for assigning the same control symbols one by one to said subcarriers for transmitting the control symbols, wherein said control symbols are picked up from the band slot having a most preferable carrier to interference power ratio to decode said control information, and then the transmission power of the apparatus is controlled based on the decoded control information.