Method of checking and acknowledging reception of data in a two-way radio communication system

A two-way radio communication system including:

• a base station that transmits information received via a transmission line, as a downstream signal;
• a plurality of radio communication terminal devices that receive information addressed to themselves via the downstream signal and that also transmit information generated by themselves as an upstream signal;
• and
• a plurality of relay stations that receive an upstream signal transmitted from the radio communication terminal devices and transmit the information included in said upstream signal to said base station via the transmission line, whereby said plurality of radio communication terminal devices transmit and receive information to and from one another via the base station and the relay station;
• said base station including:
• base station reception acknowledgment information generating means adapted to operate in such a manner that when said base station correctly receives information originating from a radio communication terminal device via the relay station and transmission line, said base station reception acknowledgment information generating means generates base station reception acknowledgment information indicating that said information has been correctly received;
• and
• base station reception acknowledgment information adding means adapted to operate in such a manner that when said base station transmits the information addressed to any of said plurality of radio communication terminal devices toward said plurality of radio communication terminal devices;
• wherein said base station reception acknowledgment information adding means adds to said information said base station reception acknowledgment information addressed to the radio communication terminal device that is the original sender of said information.

A two-way radio communication system comprising:

• a base station that transmits information received via a transmission line, as a downstream signal;
• a plurality of radio communication terminal devices that receive information addressed to themselves via the downstream signal and that also transmit information generated by themselves as an upstream signal;
• and
• a plurality of relay stations that receive an upstream signal transmitted from the radio communication terminal devices and transmit the information included in said upstream signal to said base station via the transmission line, whereby said plurality of radio communication terminal devices transmit and receive information to and from one another via the base station and the relay station;
• said base station including:
• a base station data processing unit adapted to operate in such a manner that when said base station correctly receives information originating from a radio communication terminal device via the relay station and transmission line, said base station data processing unit generates base station reception acknowledgment information indicating that said information has been correctly received;
• and
• a data adding unit adapted to operate in such a manner that when said base station transmits the information addressed to any of said plurality of radio communication terminal devices toward said plurality of radio communication terminal devices, said data adding unit adds to said information said base station reception acknowledgment information addressed to the radio communication terminal device from which said information originates.

A base station for use in a two-way radio communication system in which information sent from a radio communication terminal device at a sending end is received by a relay station, the received information is transferred to a base station via a transmission line, and the information originating from the radio communication terminal device at the sending end is further transferred from the base station to a radio communication terminal device designated as the destination of the information thereby allowing a plurality of radio communication terminal devices to transmit and receive information to and from each other,

• said base station including:
• base station reception acknowledgment information generating means adapted to operate in such a manner that when said base station correctly receives information originating from a radio communication terminal device via the relay station and transmission line, said base station reception acknowledgment information generating means generates base station reception acknowledgment information indicating that said information has been correctly received;
• base station reception acknowledgment information adding means adapted to operate in such a manner that when said base station transmits the information addressed to any of said plurality of radio communication terminal devices toward said plurality of radio communication terminal devices, said base station reception acknowledgment information adding means adds to said information said base station reception acknowledgment information addressed to the radio communication terminal device that is the original sender of said information;
• and
• transmission means for transmitting the information addressed to any of said plurality of radio communication terminal devices and said base station reception acknowledgment information added to said information toward said plurality of radio communication terminal devices.

A base station for use in a two-way radio communication system in which information sent from a radio communication terminal device at a sending end is received by a relay station, the received information is transferred to a base station via a transmission line, and the information originating from the radio communication terminal device at the sending end is further transferred from the base station to a radio communication terminal device designated as the destination of the information thereby allowing a plurality of radio communication terminal devices to transmit and receive information to and from each other,

• said base station including:
• a data processing unit adapted to operate in such a manner that when said base station correctly receives information originating from a radio communication terminal device via the relay station and transmission line, said data processing unit generates base station reception acknowledgment information indicating that said information has been correctly received;
• a data adding unit adapted to operate in such a manner that when said base station transmits the information addressed to any of said plurality of radio communication terminal devices toward said plurality of radio communication terminal devices, said data adding unit adds to said information said base station reception acknowledgment information addressed to the radio communication terminal device that is the original sender of said information;
• and
• a transmitter for transmitting the information addressed to any of said plurality of radio communication terminal devices and said base station reception acknowledgment information added to said information toward said plurality of radio communication terminal devices.

A computer-readable storage medium on which reception checking and acknowledging program is stored, for use in a two-way radio communication system in which information sent from a radio communication terminal device at a sending end is received by a relay station, the received information is transferred to a base station via a transmission line, and the information originating from the radio communication terminal device at the sending end is further transferred from the base station to a radio communication terminal device designated as the destination of the information thereby allowing a plurality of radio communication terminal devices to transmit and receive information to and from each other, wherein, in the process of transferring the information from the radio communication terminal device at the sending end to the radio communication terminal device at the destination, said reception checking and acknowledging program checks whether the information originating from the radio communication terminal device at the sending end has been correctly received and transmits data indicating the result to the radio communication terminal device at the sending end, said reception checking and acknowledging program comprising:

• a first step in which when said base station correctly receives information sent from a radio communication terminal device at the sending end via the relay station and transmission line, base station reception acknowledgment information indicating that said information has been correctly received is generated in said base station;
• and
• a second step in which when the information addressed to any of said plurality of radio communication terminal devices is transmitted from said base station toward said plurality of radio communication terminal devices, said base station reception acknowledgment information addressed to the radio communication terminal device at said sending end is added to said information and the resultant information is transmitted.