Physical layer collision avoidance (PLCA) device and method for automatically determining node identity for PLCA device

A method for automatically determining a node identity for a physical layer collision avoidance device, applicable to the physical layer collision avoidance device, comprising:

• generating a random number as identification information of the physical layer collision avoidance device, wherein the physical layer collision avoidance device maintains an identification information table and a device count;
• receiving a first synchronization packet, wherein the first synchronization packet comprises first identification information of a first physical layer collision avoidance device;
• determining a first comparison result between the identification information of the physical layer collision avoidance device and the first identification information of the first physical layer collision avoidance device;
• updating the identification information table and the device count based on the first comparison result;
• controlling the communication circuit to send a synchronization packet corresponding to the physical layer collision avoidance device based on the first comparison result;
• and
• determining the node identity for the physical layer collision avoidance device in a physical layer collision avoidance network based on the identification information table.