MIMO wireless communication system, MIMO transmission method, and apparatus
First Claim
1. A multiple-input multiple-output transmission method comprising:
- performing, by a first user equipment, cellular uplink communication with a base station;
performing, by the first user equipment, and at the same time as the cellular uplink communication, device-to-device communication with at least one second user equipment, wherein a same time-frequency resource is used for the cellular uplink communication and the device-to-device and the device-to-device and the cellular uplink communications are separate communications;
using, by the first user equipment, a first precoding matrix to perform precoding processing on data transmitted in the cellular uplink communication, so as to make interference of the cellular uplink communication in the device-to-device communication lower than a first specified threshold, where the first precoding matrix is set by a channel used by the device-to-device communication; and
using, by the first user equipment, a second precoding matrix to perform precoding processing on data transmitted in the device-to-device communication, so as to make interference of the device-to-device communication in the cellular uplink communication lower than a second specified threshold, where the second precoding matrix is set by a channel used by the cellular uplink communication.
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Abstract
Embodiments of the present invention provide a MIMO wireless communication system, a MIMO transmission method, and an apparatus, which relate to the field of communications technologies and are invented to effectively improve transmission efficiency and decrease a transmission delay. The MIMO wireless communication system includes: a base station, a first user equipment, and at least one second user equipment, where the first user equipment performs cellular uplink communication with the base station, and performs device-to-device communication with the at least one second user equipment, and the same time-frequency resource is used in the cellular uplink communication between the first user equipment and the base station and the device-to-device communication between the first user equipment and the second user equipment. The present invention is applicable to wireless communication technologies.
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Citations
13 Claims
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1. A multiple-input multiple-output transmission method comprising:
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performing, by a first user equipment, cellular uplink communication with a base station; performing, by the first user equipment, and at the same time as the cellular uplink communication, device-to-device communication with at least one second user equipment, wherein a same time-frequency resource is used for the cellular uplink communication and the device-to-device and the device-to-device and the cellular uplink communications are separate communications; using, by the first user equipment, a first precoding matrix to perform precoding processing on data transmitted in the cellular uplink communication, so as to make interference of the cellular uplink communication in the device-to-device communication lower than a first specified threshold, where the first precoding matrix is set by a channel used by the device-to-device communication; and using, by the first user equipment, a second precoding matrix to perform precoding processing on data transmitted in the device-to-device communication, so as to make interference of the device-to-device communication in the cellular uplink communication lower than a second specified threshold, where the second precoding matrix is set by a channel used by the cellular uplink communication. - View Dependent Claims (2, 3)
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4. A user equipment comprising:
- a memory, and a processor coupled to the memory, which includes processor-executable instruction that when executed causes the processor to implement the following operations;
performing cellular uplink communication with a base station; performing at the same time as the cellular uplink communication, device-to-device communication with at least one second user equipment, wherein a same time-frequency resource is used in the cellular uplink communication and the device-to-device and device-to-device cellular uplink communications are separate communications; using a first precoding matrix to perform precoding processing on data transmitted in the cellular uplink communication, so as to make interference of the cellular uplink communication in the device-to-device communication lower than a first threshold, where the first precoding matrix is set by a channel used by the device-to-device communication; and using a second precoding matrix to perform precoding processing on data transmitted in the device-to-device communication, so as to make interference of the device-to-device communication in the cellular uplink communication lower than a second specified threshold, where the second precoding matrix is set by a channel used by the cellular uplink communication. - View Dependent Claims (5, 6)
- a memory, and a processor coupled to the memory, which includes processor-executable instruction that when executed causes the processor to implement the following operations;
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7. A multiple-input multiple-output wireless communication system comprising:
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a base station, a first user equipment, and at least one second user equipment, wherein the first user equipment performs cellular uplink communication with the base station, and performs at the same time as the cellular uplink communication, device-to-device communication with the at least one second user equipment, and a same time-frequency resource is used for the cellular uplink communication between the first user equipment and the base station and the device-to-device communication between the first user equipment and the second user equipment, where the device-to-device and cellular uplink communications are separate communications; the first user equipment uses a first precoding matrix to perform precoding processing on data transmitted in the cellular uplink communication, so as to make interference of the cellular uplink communication in the device-to-device communication lower than a first specified threshold where the first precoding matrix is set by a channel used by the device-to-device communication; and the first user equipment uses a second precoding matrix to perform precoding processing on data transmitted in the device-to-device communication, so as to make interference of the device-to-device communication in the cellular uplink communication lower than a second specified threshold, where the second precoding matrix is set by a channel used by the cellular uplink communication. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification