Relay apparatus, transmitting apparatus, communication system, receiving apparatus, and communication method

A transmitting apparatus comprising:

• a transmitter that transmits a wireless signal addressed to a receiving apparatus;
• a delivery confirmation receiver that at a reception timing when a given period that starts after transmission of the wireless signal by the transmitter elapses, receives delivery confirmation information concerning the wireless signal;
• a receiver that receives from a relay apparatus that regenerates and relays the wireless signal transmitted by the transmitter, relay information indicating that the wireless signal is to be regenerated and relayed;
• and
• a timing controller that delays the reception timing by a given amount, if the relay information is received by the receiver.

A communication system comprising:

• a transmitting apparatus that transmits a wireless signal addressed to a receiving apparatus and that at a reception timing when a given period that starts after transmission of the wireless signal elapses, receives delivery confirmation information concerning the wireless signal;
• a relay apparatus that regenerates and relays the wireless signal transmitted by the transmitting apparatus, and that transmits to the transmitting apparatus, relay information indicating that the wireless signal is to be regenerated and relayed;
• and
• the receiving apparatus that receives the wireless signal regenerated and relayed by the relay apparatus, wherein
• the transmitting apparatus delays the reception timing by a given amount, upon receiving the relay information transmitted by the relay apparatus.

A receiving apparatus comprising:

• a receiver that receives a wireless signal that is transmitted by a transmitting apparatus, and regenerated and relayed by a relay apparatus, the transmitting apparatus, after a given period that starts after transmission of the wireless signal to the receiving apparatus, receiving delivery confirmation information concerning the wireless signal;
• a transmission judger that judges whether delivery confirmation information concerning the wireless signal received by the receiver can be transmitted at the reception timing at the transmitting apparatus;
• and
• a notifier that, if the transmission judger judges that the delivery confirmation information cannot be transmitted at the reception timing, notifies the transmitting apparatus of relay information indicating that the wireless signal received by the receiver is regenerated and relayed by the relay apparatus to make the transmitting apparatus to delay the reception timing by a given amount.

A communication system comprising a receiving apparatus, a relay apparatus that regenerates and relays a wireless signal, and a transmitting apparatus that after a given period that starts after transmission of the wireless signal to the receiving apparatus, receives delivery confirmation information concerning the wireless signal, wherein:

• the transmitting apparatus transmits the wireless signal addressed to the receiving apparatus and at a reception timing when a given period that starts after transmission of the wireless signal elapses, receives delivery confirmation information concerning the wireless signal,
• the relay apparatus regenerates and relays the wireless signal transmitted by the transmitting apparatus,
• the receiving apparatus receives the wireless signal regenerated and relayed by the relay apparatus, and notifies the transmitting apparatus of relay information indicating that the wireless signal is regenerated and relayed by the relay apparatus, and
• the transmitting apparatus delays the reception timing by a given amount, upon receiving the relay information transmitted by the relay apparatus.

A communication method of a communication system that includes a receiving apparatus and a transmitting apparatus that after a given period that starts after transmission of a wireless signal to the receiving apparatus, receives delivery confirmation information concerning the wireless signal, the communication method comprising:

• receiving and decoding the wireless signal transmitted by the transmitting apparatus;
• determining whether the decoded wireless signal is subject to relay;
• notifying, if the wireless signal to subject to relay, the transmitting apparatus of relay information indicating that the wireless signal is to be regenerated and relayed to make the transmitting apparatus to delay the reception timing by a given amount and the relay information including delay information indicating a period of time that the wireless signal is delayed consequent to regeneration and relay by the relay apparatus;
• and
• transmitting to the receiving apparatus, the wireless signal that has been determined to be subject to relay.

A communication method comprising:

• transmitting a wireless signal addressed to a receiving apparatus;
• receiving at a reception timing when a given period that starts after transmission of the wireless signal elapses, delivery confirmation information concerning the wireless signal;
• receiving from a relay apparatus that regenerates and relays the wireless signal transmitted at the transmitting, relay information indicating that the wireless signal is to be regenerated and relayed;
• and
• performing timing control of delaying the reception timing by a given amount, if the relay information is received.

A communication method of a communication system that includes a relay apparatus that regenerates and relays a wireless signal, and a transmitting apparatus that after a given period that starts after transmission of the wireless signal to a receiving apparatus, receives delivery confirmation information concerning the wireless signal, the communication method comprising:

• receiving the wireless signal that is transmitted by the transmitting apparatus, and regenerated and relayed by the relay apparatus;
• judging whether delivery confirmation information concerning the wireless signal received by the receiver can be transmitted at the reception timing at the transmitting apparatus;
• and
• notifying, if the delivery confirmation information cannot be transmitted at the reception timing, the transmitting apparatus of relay information indicating that the received wireless signal is regenerated and relay by the relay apparatus to make the transmitting apparatus to delay the reception timing by a given amount.