Timing control of relay station controlled by network

A communication control apparatus that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control apparatus comprises at least one processor that performs, by a timing controller, controlling an uplink transmission timing of the relay station to the radio access network in the relay of the uplink communication to be before the timing at which a propagation delay between the relay station and the radio access network is subtracted from a next downlink reception timing in the time division duplex of the relay station from the radio access network in the relay of the downlink communication.

A communication control apparatus that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control apparatus comprises at least one processor that performs, by a communication controller, delaying the uplink communication by the relay station to the radio access network until the further next uplink transmission timing in the time division duplex, if the timing at which an uplink processing delay of the relay station in the relay is added to an uplink reception timing of the relay station from the communication device in the relay of the uplink communication is after the timing at which a propagation delay between the relay station and the radio access network is subtracted from a next downlink reception timing in the time division duplex of the relay station from the radio access network in the relay of the downlink communication.

A communication control apparatus that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control apparatus comprises at least one processor that performs, by a communication controller, causing the relay station to perform the uplink communication to the radio access network by using at least one flexible symbol allocated to an uplink symbol, if the timing at which an uplink processing delay of the relay station in the relay is added to an uplink reception timing of the relay station from the communication device in the relay of the uplink communication is after the timing at which a propagation delay between the relay station and the radio access network is subtracted from a next downlink reception timing in the time division duplex of the relay station from the radio access network in the relay of the downlink communication.

A communication control apparatus that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control apparatus comprises at least one processor that performs, by a communication controller, increasing the number of uplink symbols allocated to an uplink reception timing and an uplink transmission timing of the relay station in the relay of the uplink communication, if the timing at which an uplink processing delay of the relay station in the relay is added to an uplink reception timing of the relay station from the communication device in the relay of the uplink communication is after the timing at which a propagation delay between the relay station and the radio access network is subtracted from a next downlink reception timing in the time division duplex of the relay station from the radio access network in the relay of the downlink communication.

A communication control apparatus that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control apparatus comprises at least one processor that performs, by a communication controller, adjusting a downlink processing delay of the relay station in the relay of the downlink communication, if the timing at which an uplink processing delay of the relay station in the relay is added to an uplink reception timing of the relay station from the communication device in the relay of the uplink communication is after the timing at which a propagation delay between the relay station and the radio access network is subtracted from a next downlink reception timing in the time division duplex of the relay station from the radio access network in the relay of the downlink communication.

A communication control apparatus that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control apparatus comprises at least one processor that performs, by a communication controller, imposing an upper limit on an uplink processing delay of the relay station in the relay of the uplink communication.

A communication control apparatus that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control apparatus comprises at least one processor that performs, by a processing delay sharing device, sharing from the relay station to the radio access network, at least one of a downlink processing delay of the relay station in the relay of the downlink communication and an uplink processing delay of the relay station in the relay of the uplink communication.

A communication control method that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control method comprises controlling an uplink transmission timing of the relay station to the radio access network in the relay of the uplink communication to be after the timing at which an uplink processing delay of the relay station in the relay is added to an uplink reception timing of the relay station from the communication device in the relay.

A communication control method that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control method comprises controlling an uplink transmission timing of the relay station to the radio access network in the relay of the uplink communication to be before the timing at which a propagation delay between the relay station and the radio access network is subtracted from a next downlink reception timing in the time division duplex of the relay station from the radio access network in the relay of the downlink communication.

A computer-readable medium storing a communication control program that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control program causes a computer to perform controlling an uplink transmission timing of the relay station to the radio access network in the relay of the uplink communication to be after the timing at which an uplink processing delay of the relay station in the relay is added to an uplink reception timing of the relay station from the communication device in the relay.

A computer-readable medium storing a communication control program that controls by time division duplex a communication network comprising a radio access network, a communication device capable of communicating with the radio access network, and a relay station that relays downlink communication and uplink communication between the radio access network and the communication device under the control of the radio access network, wherein

• the communication control program causes a computer to perform controlling an uplink transmission timing of the relay station to the radio access network in the relay of the uplink communication to be before the timing at which a propagation delay between the relay station and the radio access network is subtracted from a next downlink reception timing in the time division duplex of the relay station from the radio access network in the relay of the downlink communication.