The invention relates to a communication method and device, which are used for transmitting signals by using satellites simultaneously supporting a transparent forwarding mode and a regenerative forwarding mode. The network equipment indicates a first uplink
time domain position and a first downlink
time domain position through the first information, the first uplink
time domain position is used for transmitting an uplink
signal of a first forwarding mode in a first period, and the first downlink time domain position is used for transmitting a downlink
signal of the first forwarding mode in the first period. The
satellite indicates a third uplink time domain position and a third downlink time domain position through fifth information, the third uplink time domain position is used for transmitting the uplink
signal of the first forwarding mode, and the third downlink time domain position is used for transmitting the downlink signal of the first forwarding mode. Therefore, the network equipment can be used as an uplink and downlink time reference point of the signal of the first forwarding mode, the
satellite can be used as a time reference point of the signal of the second forwarding mode, the signal of the first forwarding mode is located in an uplink and downlink time domain position reserved by the
satellite, and no interference exists between the signals of the two forwarding
modes.