Frame collision rate calculation method for frame on can bus, and can bus resource minimization method

A CAN bus resource minimization method, comprising:

• S1. setting an initial CAN bus communication rate;
• S2. at the CAN bus communication rate in step S1 and on the basis of an Erlang B formula in the queuing theory, calculating a frame collision rate of a frame of each priority, the running of which on a CAN bus is planned;
• S3. determining whether the frame collision rate of the frame of each priority calculated in step S2 exceeds an allowable frame collision rate upper limit associated with the respective priority;
• when the frame collision rate calculated in step S2 exceed the allowable frame collision rate upper limit, increasing the CAN bus communication rate in step S1, and returning to step S2 for continued iteration;
• when the frame collision rate calculated in step S2 does not exceed the allowable frame collision rate upper limit, decreasing the CAN bus communication rate in step S1, and returning to step S2 for continued iteration;
• and
• S4. outputting a minimum communication rate corresponding to the frame collision rate of the frame of each priority that does not exceed the allowable frame collision rate upper limit associated with the respective priority.

A computer-readable storage medium with a computer program stored thereon, wherein the computer program, when executed by a processor, can implement a CAN bus resource minimization method, wherein the CAN bus resource minimization method comprises:

• S1. setting an initial CAN bus communication rate;
• S2. at the CAN bus communication rate in step S1 and on the basis of an Erlang B formula in the queuing theory, calculating a frame collision rate of a frame of each priority, the running of which on a CAN bus is planned;
• S3. determining whether the frame collision rate of the frame of each priority calculated in step S2 exceeds an allowable frame collision rate upper limit associated with the respective priority;
• when the frame collision rate calculated in step S2 exceed the allowable frame collision rate upper limit, increasing the CAN bus communication rate in step S1, and returning to step S2 for continued iteration;
• when the frame collision rate calculated in step S2 does not exceed the allowable frame collision rate upper limit, decreasing the CAN bus communication rate in step S1, and returning to step S2 for continued iteration;
• and
• S4. outputting a minimum communication rate corresponding to the frame collision rate of the frame of each priority that does not exceed the allowable frame collision rate upper limit associated with the respective priority.