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US 9,635,656 B2Granted
Data communication method, communication system and mobile terminal
AssigneeMitsubishi Electric Corporation
InventorsMiho Maeda, Mitsuru Mochizuki, Keiko Tada, Yasushi Iwane
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Abstract
In a communications system which complies with LTE including a base station 2 which transmits data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method, and a mobile terminal 3, in a case in which an uplink scheduling request signal SR is transmitted by using an S-RACH when an Ack/Nack signal is being transmitted by using an Ack/Nack exclusive channel, the transmission of the Ack/Nack signal is stopped while the uplink scheduling request signal SR is transmitted.
Claims3
A data communication method which is implemented by a communication system, the method comprising:
- transmitting data by a base station using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method;
- transmitting, by a mobile terminal, a quality notification signal for notifying downlink communication quality to said base station;
- transmitting, by said mobile terminal, a scheduling request signal to said base station requesting allocation of radio resources from said base station before transmitting transmission data to said base station;
- and
- performing, by said mobile terminal:
- a quality notification process that includes transmitting said quality notification signal to said base station;
- a scheduling request signal transmission process that includes transmitting said scheduling request signal to said base station;
- a first control process that includes, when the mobile terminal has not been allocated a radio resource for transmitting said transmission data, transmitting said scheduling request signal to said base station;
- and
- a second control process that includes, when said quality notification process coincides with said scheduling request signal transmission process, stopping said quality notification process during a time interval during which said mobile terminal transmits said scheduling request signal.
7 more elements
A communications system comprising:
- a base station configured to transmit data by using an OFDM (Orthogonal Frequency Division Multiplexing) method as a downlink access method;
- and
- a mobile terminal configured to transmit a quality notification signal for notifying downlink communication quality to said base station, and to transmit a scheduling request signal with which to make a request for allocation of radio resources to said base station before transmitting transmission data to said base station,
- wherein said mobile terminal includes:
- a transmitter configured to transmit said quality notification signal to said base station, and to transmit said scheduling request signal to said base station;
- and
- a controller configured to perform a first control process that includes, when the mobile terminal has not been allocated a radio resource for transmitting said transmission data, transmitting said scheduling request signal to said base station, and a second control process that includes, when a transmission of said quality notification signal coincides with that of said scheduling request signal in said transmitter, stopping transmitting said quality notification signal during a time interval during which said transmitter transmits said scheduling request signal.
4 more elements
A mobile terminal configured to:
- transmit a quality notification signal for notifying downlink communication quality to a base station, and
- transmit a scheduling request signal with which to make a request for allocation of radio resources to said base station before transmitting transmission data to said base station, wherein said mobile terminal includes:
- a transmitter configured to transmit said quality notification signal to said base station, and to transmit said scheduling request signal to said base station;
- and
- a controller configured to perform a first control process that includes, when the mobile terminal has not been allocated a radio resource for transmitting said transmission data, transmitting said scheduling request signal to said base station, and a second control process that includes, when a transmission of said quality notification signal coincides with that of said scheduling request signal in said transmitter, stopping transmitting said quality notification signal during a time interval during which said transmitter transmits said scheduling request signal.
2 more elements
Dependencies are inferred from the claim text.