Method for loss reduction in a communication interface

Patent metadata

Field	Value
Publication number	US-12388562-B2
Application number	US-202217873077-A
Country	US
Kind code	B2
Filing date	Jul 25, 2022
Priority date	Aug 12, 2021
Publication date	Aug 12, 2025
Grant date	Aug 12, 2025

Abstract

A method for loss reduction in a communication interface having differential power loss as a function of a transmitted bit. A data format of transmitted data and/or a data format of address data that characterize the addresses of communication subscribers is selected as a function of the expected number of bits having higher power loss and/or the expected number of bits having lower power loss in the data, in such a way that the number of bits having lower power loss is increased.

First claim

What is claimed is:

1. A method for providing loss reduction in a communication interface having differential power loss as a function of transmitted bits, the method comprising:
selecting: (i) a data format of transmitted data to be transmitted using the communication interface, or (ii) a data format of address data that characterize: (a) addresses of communication subscribers or (b) addresses of messages of the communication subscribers, wherein the selecting of the data format of the transmitted data or the data format of the address data is a function of: (i) an expected number of bits, in the transmitted data or the address data, having higher power loss during transmission of the transmitted data or the address data, or (ii) an expected number of bits, in the transmitted data or the address data, having lower power loss during transmission of the transmitted data or the address data, wherein the data format is selected so that a number of bits within the transmitted data or the address data having the lower power loss during transmission is increased and a number of bits within the transmitted data or the address data having the higher power loss during transmission is decreased, wherein the communication interface is a CAN bus, wherein dominant bits on the CAN bus are the bits having the higher power loss and recessive bits on the CAN bus are the bits having the lower power loss, wherein each dominant bit of the dominant bits represents a logical zero and each recessive bit of the recessive bits represents a logical one, and wherein the higher power loss and the lower power loss are power losses in a bus driver module for the CAN bus during transmission of the transmitted data or the address data;
wherein the addresses of the communication subscribers or the addresses of messages of the communication subscribers are selected based on an assignment table using 1-of-n encoding, wherein the one-of-n encoding encodes log 2n bits in a code-word of n bits, and wherein the communication subscribers include a plurality of sensors, wherein the addresses are assigned to the sensors to uniquely identify each sensor, wherein all of the addresses assigned to the sensors, in a binary representation, contains a plurality of bits including at most one zero.

2. The method as recited in claim 1 , wherein the selecting includes selecting the data format of the transmitted data, wherein the transmitted data are measurement data, and the data format of the measurement data is selected as a function of a type of measurement that the measurement data represents, wherein the type of measurement is a distance measurement or a relative speed measurement.

3. The method as recited in claim 1 , wherein the selected data format is communicated to an electronic control device that controls the communication interface.

4. The method as recited in claim 1 , wherein the selecting includes selecting the data format of the transmitted data, and wherein a standard value for unused values within the data format is selected, as a function of: (i) the expected number of bits in the transmitted data having the higher power loss during transmission of the transmitted data, or (ii) the expected number of bits in the transmitted data having the lower power loss during transmission of the transmitted data, the standard value being selected so that the number of bits having the lower power loss during transmission is increased.

5. The method as recited in claim 1 , wherein the selecting includes selecting the data format of the transmitted data, and wherein a data compression method is used, the data compression method having a dictionary, the dictionary being selected based on the expected number of bits in the transmitted data having the higher power loss during transmission of the transmitted data, or the expected number of bits in the transmitted data having lower power loss during transmission of the transmitted data, so that the number of bits in the transmitted data having the lower power loss during transmission of the transmitted data is increased.

6. The method as recited in claim 1 , wherein the transmitted data include measurement data from a radar sensor in a vehicle, wherein an expected number of bits in the measurement data having the higher power loss during transmission is higher than an expected number of bits in the measurement data having the lower power loss during transmission, and the data format for the transmitted data is selected so as to invert the measurement data so that the number of bits within the transmitted data having the lower power loss during transmission of the transmitted data is increased and the number of bits within the transmitted data having the higher power loss during transmission of the transmitted data is decreased.

7. The method as recited in claim 1 , wherein the selecting of the data format of the transmitted data or the address data includes selecting the data format of the transmitted data, wherein the transmitted data are measurement data, and the data format of the measurement data is selected as a function of a position of sensors in a vehicle that provide the measurement data, wherein the data format for the transmitted data is selected so as to invert measurement data from a sensor located in a first end of the vehicle and so as not to invert measurement data from a sensor located in a second end of the vehicle, the first end being an opposite end of the vehicle relative to the second end.

8. A non-transitory machine-readable storage medium, on which is stored a computer program, which is executable by a processor of an electronic control device, comprising:
a program code arrangement having program code for providing loss reduction in a communication interface having differential power loss as a function of transmitted bits, by performing the following:
selecting: (i) a data format of transmitted data to be transmitted using the communication interface, or (ii) a data format of address data that characterize: (a) addresses of communication subscribers or (b) addresses of messages of the communication subscribers, wherein the selecting of the data format of the transmitted data or the address data is a function of: (i) an expected number of bits, in the transmitted data or the address data, having higher power loss during transmission of the transmitted data or the address data, or (ii) an expected number of bits, in the transmitted data or the address data, having lower power loss during transmission of the transmitted data or the address data, the data format being selected so that a number of bits in the transmitted data or the address data, having lower power loss during transmission is increased and a number of bits within the transmitted data or the address data having the higher power loss during transmission is decreased, wherein the communication interface is a CAN bus, wherein dominant bits on the CAN bus are the bits having the higher power loss and recessive bits on the CAN bus are the bits having the lower power loss, wherein each dominant bit of the dominant bits represents a logical zero and each recessive bit of the recessive bits represents a logical one, and wherein the higher power loss and the lower power loss are power losses in a bus driver module for the CAN bus during transmission of the transmitted data or the address data;
wherein the addresses of the communication subscribers or the addresses of the messages of the communication subscribers are selected based on an assignment table using 1-of-n encoding, wherein the one-of-n encoding encodes log 2n bits in a code-word of n bits, and wherein the communication subscribers include a plurality of sensors, wherein the addresses are assigned to the sensors to uniquely identify each sensor, wh

Assignees

• Bosch Gmbh Robert

Inventors

• Schoor Michael
• Beyer Theresa

Classifications

• H04L1/0004

  applied to control information · CPC title

• H04L12/40 Primary

  Bus networks · CPC title

• H04L2012/40215

  Controller Area Network CAN · CPC title

• H04L2012/40273

  the transportation system being a vehicle · CPC title

• H04L1/0006 Primary

  by adapting the transmission format · CPC title