Communication system with cross-compatibility and associated communication frame

摘要

The system transmits a command frame that has a part comprising a basic radio technology somfy (RTS) (RTM: Not defined) frame and a control field (CKS1), and another part comprising additional information and a control field (CKS2). A relay bit beginning the latter part has a predetermined value i.e. 1. The information is encrypted with the respective encryption keys transmitted in the former and latter parts.