Relay transmission system, base station, relay station, and method
AssigneeNtt Docomo, Inc.
InventorKenichi Higuchi
Life of this patent
Estimating the term…
Abstract
A base station used in a relay transmission system is disclosed. The base station includes a metric provision unit providing a metric indicating radio propagation conditions of a user equipment terminal; a relay information generation unit generating a relay information for the user equipment terminal based on the metric, the relay information indicating whether an uplink signal is to be transmitted via one or more relay stations; a scheduling unit generating an allocation plan of radio resources based on the relay information; and a control signal transmission unit transmitting a control signal including a scheduling information indicating the allocation plan.
Claims19
A base station used in a relay transmission system, the base station comprising:
- a metric provision unit configured to provide a metric indicating radio propagation conditions of a user equipment terminal;
- a relay information generation unit configured to generate relay information for the user equipment terminal based on the metric, the relay information indicating whether an uplink signal is to be transmitted via one or more relay stations;
- a scheduling unit configured to generate an allocation plan of radio resources based on the relay information;
- and
- a control signal transmission unit configured to transmit a control signal including scheduling information indicating the allocation plan.
A method used in a base station of a relay transmission system, the method comprising:
- a metric providing step of providing a metric indicating radio propagation conditions of a user equipment terminal;
- a relay information generating step of generating relay information for the user equipment terminal based on the metric, the relay information indicating whether an uplink signal is to be transmitted via one or more relay stations;
- a scheduling step of generating an allocation plan of radio resources based on the relay information;
- and
- a control signal transmitting step of transmitting a control signal including scheduling information indicating the allocation plan.
A relay station used in a relay transmission system, the relay station comprising:
- a receiving unit configured to receive an uplink signal from a user equipment terminal;
- an amplification unit configured to amplify the uplink signal based on an instruction signal;
- a transmission unit configured to transmit the uplink signal in uplink, the uplink signal having been amplified by the amplification unit;
- a demodulation unit configured to receive and demodulate a control signal including scheduling information of uplink radio resources;
- and
- an instruction signal generation unit configured to generate the instruction signal by determining whether the uplink signal is required to be relayed for the user equipment terminal based on the control signal, wherein
- the instruction signal indicates whether the uplink signal is to be amplified depending on whether the uplink signal is required to be relayed.
A method used in a relay station in a relay transmission system, the method comprising:
- a receiving step of receiving an uplink signal from a user equipment terminal;
- an amplifying step of amplifying the uplink signal based on an instruction signal;
- and
- a transmitting step of transmitting the uplink signal in uplink, the uplink signal having been amplified in the amplifying step, wherein
- a control signal including scheduling information of uplink radio resources is received and demodulated,
- the instruction signal is generated by determining whether the uplink signal is required to be relayed for the user equipment terminal based on the control signal, and
- the instruction signal indicates whether the uplink signal is to be amplified depending on whether the uplink signal is required to be relayed.
A relay transmission system including one or more user equipment terminals, one or more relay stations, and a base station,
- the base station comprising:
- a metric provision unit configured to provide a metric indicating radio propagation conditions of each of the user equipment terminals;
- a relay information generation unit configured to generate relay information for each of the user equipment terminals based on the corresponding metric, the relay information indicating whether an uplink signal is to be transmitted via one or more of the relay stations;
- a scheduling unit configured to generate an allocation plan of radio resources based on the relay information;
- and
- a control signal transmission unit configured to transmit a control signal including scheduling information indicating the allocation plan,
- at least one of the relay stations comprising
- a receiving unit configured to receive an uplink signal from one of the user equipment terminals;
- an amplification unit configured to amplify the uplink signal based on an instruction signal;
- a transmission unit configured to transmit the uplink signal in uplink, the uplink signal having been amplified by the amplification unit;
- a demodulation unit configured to receive and demodulate a control signal including scheduling information of uplink radio resources;
- and
- an instruction signal generation unit configured to generate the instruction signal by determining whether the uplink signal is required to be relayed for the one of the user equipment terminals based on the control signal, wherein
- the instruction signal indicates whether the uplink signal is to be amplified depending on whether the uplink signal is required to be relayed.
Dependencies are inferred from the claim text.