A method of communicating between a first device (e.g., an AP) and each of with a legacy device and a non-legacy device (e.g., STAs) includes, at the first device, generating a first information field for the legacy device, generating a second information field for the non-legacy device, generating a frame including the first information field and the second information field, and transmitting the frame, wherein the first information field includes a first value by which the legacy device identifies the first information field as valid, wherein the second information field includes a second value by which the legacy device identifies the second information field as invalid.