Scrambling data for use with vehicle communication protocol
A scrambling method of data on a J1939 communication system of a vehicle involves at least moving data from one of a PGN and a PGN/SPN location to another PGN or PGN/SPN location at a first controller on the vehicle before transmitting data and then re-ordering the data at a second controller. Some embodiments further comprise encrypting data either before or after shifting, but before transmitting so as to further complicate efforts to interpret meaningful data from the transmission. The second controller may be on the vehicle or may be remotely located.
1. A refuse collection vehicle, comprising:
a chassis supporting a refuse service body;
a communications bus configured to transmit data according to a J1939 transmission protocol comprising a plurality of Parameter Group Numbers (PGNs); and
a controller communicatively coupled to the communications bus, the controller configured to:
receive data corresponding to an operation of the refuse service body, the received data having a first PGN assignment;
process the received data to shift data from the first PGN assignment to a second PGN assignment; and
direct the processed data through the communications bus via the J1939 transmission protocol according to the second PGN assignment.
2. The refuse collection vehicle of claim 1 , wherein the received data comprises eight bytes in a first order, the eight bytes having the first PGN assignment.
3. The refuse collection vehicle of claim 2 , wherein the controller is configured to process the received data to rearrange the eight bytes into a second order.
4. The refuse collection vehicle of claim 3 , further comprising a second controller communicatively coupled to the communications bus, the second controller configured to receive and process the data having the second order of the eight bytes and the second PGN assignment to shift and rearrange the eight bytes back to the first order and the first PGN assignment.
5. The refuse collection vehicle of claim 1 , wherein the refuse service body comprises a grabber arm and a sensor responsive to a position of the grabber arm, and wherein the data corresponding to operation of the refuse service body comprises output from the sensor.
6. The refuse collection vehicle of claim 5 , wherein the refuse service body further comprises an arm control joystick, and wherein the data corresponding to operation of the refuse service body comprises output from the arm control joystick.
7. The refuse collection vehicle of claim 5 , wherein the data corresponding to operation of the refuse service body comprises information scanned from an RFID tag associated with a refuse can engaged by the grabber arm.
8. The refuse collection vehicle of claim 1 , wherein the controller is further configured to receive data corresponding to operation of the chassis and associate chassis data with service body data as event data, and wherein processing the received data comprises processing the event data.
9. The refuse collection vehicle of claim 8 , wherein the event data further comprises a time stamp and location data.
10. The refuse collection vehicle of claim 1 , wherein the communications bus comprises a CAN protocol bus.
11. The refuse collection vehicle of claim 1 , wherein the controller is further configured to inject ghost values into the received data.
12. The refuse collection vehicle of claim 1 , wherein the controller is configured to change a shift pattern for processing the received data as a function of time.
13. The refuse collection vehicle of claim 1 , further comprising a transmitter configured to receive the processed data over the communications bus and transmit the data over a wireless network to a remote computing device.
14. The refuse collection vehicle of claim 1 , wherein the controller is configured to direct the processed data to an OBD II port.
15. A refuse collection vehicle, comprising:
a chassis supporting a refuse service body;
a CAN bus configured to transmit data according to a J1939 transmission protocol comprising a plurality of Parameter Group Numbers (PGNs);
a controller communicatively coupled to the CAN bus, the controller configured to:
receive data corresponding to an operation of the refuse service body, the received data having a first PGN assignment;
process the received data to shift data from the first PGN assignment to a second PGN assignment;
direct the processed data through the CAN bus via the J1939 transmission protocol according to the second PGN assignment; and
a transmitter configured to receive the processed data over the CAN bus and transmit the data over a wireless network to a remote computing device.
16. The refuse collection vehicle of claim 15 , wherein the refuse service body comprises a grabber arm and a sensor responsive to a position of the grabber arm, and wherein the data corresponding to operation of the refuse service body comprises output from the sensor.
17. The refuse collection vehicle of claim 15 , wherein the controller is further configured to receive data corresponding to operation of the chassis and associate chassis data with service body data as event data, and wherein processing the received data comprises processing the event data.
18. The refuse collection vehicle of claim 17 , wherein the controller is configured to change a shift pattern for processing the received data as a function of time.
19. The refuse collection vehicle of claim 15 , wherein the received data comprises eight bytes in a first order, the eight bytes having the first PGN assignment.
20. The refuse collection vehicle of claim 19 , wherein the controller is configured to process the received data to rearrange the eight bytes into a second order.