The consumer electronic bus symbol encoding sublayer: a twisted pair implementation

The consumer electronic bus (CEbus) is the communication standard for home automation systems. The implementation of the consumer electronic bus physical layer symbol encoding sublayer (PLSE) is presented. The PLSE performs several functions in the CEbus node. It is responsible for decoding and encoding CEbus symbols into the proper signal duration on the physical medium. It is also responsible for detecting and reporting medium failures to the layer system management and provides the medium access control (MAC) sublayer with a time base specific to each medium. The circuit can be realized using discrete components and can be easily implemented on a VLSI circuit. The circuit controller base clock may be scaled to adapt to the PLSE to various data signalling rates, while maintaining constant symbol encoding and decoding relative errors