A communication method, a terminal device and a network device are provided. The communication method includes: a terminal device transmits a predetermined uplink sequence, the uplink sequence is used for indicating that the terminal device has a demand for determining a target network device; the terminal device receives a first downlink message transmitted by a network system according to the uplink sequence; and when the first downlink message is used for identifying a first network device, the terminal device determines that the target network device is the first network device according to the first downlink message, the first network device is determined by the network system according to location information of the terminal device.