A first communications device , wherein the first communications device being a first terminal device comprises a processing module and a transceiver module ; the processing module is configured to determine a capability identifier of the first communications device, wherein the capability identifier of the first communications device is one of one or more capability identifiers corresponding to the first communications device; and the transceiver module is configured to send the capability identifier of the first communications device to a second communications device , wherein the capability identifier of the first communications device is used to determine a communication capability of the first communications device ; wherein the processing module is specifically configured to: when the first communications device supports reporting the capability identifier of the first communications device , determine the capability identifier of the first communications device and send the capability identifier to the second communications device , and wherein when the first communications device does not support reporting the capability identifier of the first communications device , the first communications device is configured to send indication information to the second communications device , wherein the indication information is used to indicate that the first communications device does not support reporting the capability identifier of the first communications device . the processing module is configured to determine a capability identifier of the first communications device, wherein the capability identifier of the first communications device is one of one or more capability identifiers corresponding to the first communications device; and the transceiver module is configured to send the capability identifier of the first communications device to a second communications device , wherein the capability identifier of the first communications device is used to determine a communication capability of the first communications device ; wherein the processing module is specifically configured to: when the first communications device supports reporting the capability identifier of the first communications device , determine the capability identifier of the first communications device and send the capability identifier to the second communications device , and wherein when the first communications device does not support reporting the capability identifier of the first communications device , the first communications device is configured to send indication information to the second communications device , wherein the indication information is used to indicate that the first communications device does not support reporting the capability identifier of the first communications device . when the first communications device supports reporting the capability identifier of the first communications device , determine the capability identifier of the first communications device and send the capability identifier to the second communications device , and wherein when the first communications device does not support reporting the capability identifier of the first communications device , the first communications device is configured to send indication information to the second communications device , wherein the indication information is used to indicate that the first communications device does not support reporting the capability identifier of the first communications device . <EOS>