Patent ID: 9693378
Date: 2017-06-27
CPC Classifications: H04B,H04W

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.