Method and device for transmitting configuration information of reference signal and method and device for receiving configuration information of reference signal

A communication device, comprising:

• one or more processors;
• and
• a memory that stores a computer program, wherein
• the one or more processors execute the computer program stored in the memory to cause the communication device to receive capability information transmitted from a second communication device, wherein the capability information comprises a number of orbital angular momentum (OAM) modes supported by the second communication device;
• and transmit configuration information of an OAM measurement reference signal to the second communication device, wherein the configuration information is configured to indicate an antenna port of the second communication device for measuring the OAM measurement reference signal and an OAM mode value corresponding to the antenna port, wherein a correspondence relationship is established between the OAM mode value and the number of OAM modes, and the OAM mode value is determined according to the number of OAM modes supported by the second communication device.