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US 11,153,027 B2Granted
Layered modulation for machine type communication (MTC) transmissions from multiple transceiver stations
AssigneeKYOCERA Corporation
InventorsAmit Kalhan, Henry Chang
Life of this patent
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Abstract
A first transceiver station broadcasts information to machine type communication (MTC) devices in the coverage area of the transceiver station using layered modulation where MTC devices receiving the broadcast above a signal quality threshold can recover the MTC information by applying a high modulation order. MTC devices receiving the broadcast below the quality threshold, recover a portion of the MTC information by applying a lower modulation order and recover the remaining portion of the MTC information transmitted from a second transceiver.
Claims19
A method comprising:
- broadcasting, from a base station, machine type communication (MTC) information in a first transmission using layered modulation such that a first MTC device receiving the first transmission above a signal quality threshold can recover the MTC information using a high modulation order and such that a second MTC device receiving the first transmission below the signal quality threshold can recover a portion of the MTC information using a lower modulation order lower than the high modulation order;
- receiving the first transmission at a relay station;
- retrieving a remaining portion of the MTC information at the relay station;
- receiving, from the second MTC device, an indicator indicating whether the relay station is to transmit the remaining portion of the MTC information, wherein the transmitting, from the relay station, the remaining portion of MTC information is based on the indicator;
- and
- transmitting, from a the relay station, the remaining portion of the MTC information in a second transmission such that the second MTC device receiving the second transmission can recover the remaining portion of the MTC information to recover the MTC information.
3 more elements
A machine type communication (MTC) device comprising:
- a receiver configured to:
- receive, from a base station, a first signal comprising MTC information, the first signal modulated using layered modulation such that the MTC information is modulated with a high modulation order and that a portion of the MTC information is modulated with a lower modulation order lower than the higher modulation order;
- receive, from a relay station, a second signal comprising a remaining portion of the MTC information, wherein the first signal was received at the relay station and the relay station retrieved the remaining portion of the MTC information from the first signal;
- a transmitter configured to transmit, to the relay station, an indicator indicating whether the relay station is to transmit the remaining portion of the MTC information, wherein the transmitting, from the relay station, the remaining portion of MTC information is based on the indicator;
- and
- a demodulator configured to demodulate the first signal using the lower modulation order to recover the portion of MTC information and to demodulate the second signal to recover the remaining portion of the MTC information such that the MTC information is received at the MTC device.
3 more elements
A relay station comprising:
- a receiver configured to:
- receive, from a base station, machine type communication (MTC) information in a first transmission using layered modulation such that a first MTC device receiving the first transmission above a signal quality threshold can recover the MTC information using a high modulation order and such that a second MTC device receiving the first transmission below the signal quality threshold can recover a portion of the MTC information using a lower modulation order lower than the high modulation order, and
- receive, from the second MTC device, an indicator indicating whether the relay station is to transmit a remaining portion of the MTC information, wherein the transmitting, from the relay station, the remaining portion of MTC information is based on the indicator;
- a controller configured to retrieve the remaining portion of the MTC information from the received first transmission;
- and
- a transmitter configured to transmit the remaining portion of the MTC information in a second transmission such that the second MTC device receiving the second transmission can recover the remaining portion of the MTC information to recover the MTC information.
3 more elements
Dependencies are inferred from the claim text.