Module for Exchanging Information By Carrier Currents and Method for Managing the Operation of Said Module

• US 20080090544A1
• Filed: 06/14/2005
• Published: 04/17/2008
• Est. Priority Date: 06/18/2004
• Status: Active Grant

• Current Assignee: Valeo Electronique et Systems de Liaison
• Original Assignee: Valeo Electronique et Systems de Liaison
• Inventors: Bories, Francis, Hubert, Vincent
• Granted Patent: US 7,945,296 B2
• Time in Patent Office: Days
• US Class Current: 455/334
• CPC Class Codes: H04B 2203/547 via DC power distribution
• CPC Class Codes: H04B 2203/5483 using coupling circuits
• CPC Class Codes: H04B 3/548 the power on the line being DC arrangements for feeding power H04L12/10; extracting feeding power from signals H04L25/02
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The module for exchanging information by carrier-currents (22, 24) for controlling an electrical member (12, 14) includes first receiver means (34A, 36A) for receiving an information-conveying signal. The first receiver means (34A, 36A) may take on two states, respectively an activated state and a deactivated state. The module (22, 24) further includes second receiver means (34B, 36B) for receiving a wakeup signal for activating the first receiver means (34A, 36A) to switch from the deactivated state to the activated state.

Claims

1. A module for exchanging information by carrier-currents for controlling an electrical member, the module being of the type comprising first receiver means for receiving an information-conveying signal, said first receiver means being capable of taking two states, respectively an activated state and a deactivated state, wherein the module further comprises second receiver means for receiving a wakeup signal for activating the first receiver means to cause them to pass from their deactivated state to their activated state.

2. The module according to claim 1, in which the first receiver means are responsive to signals at frequencies lying in a first frequency band, and the second receiver means are responsive to signals at frequencies lying in a second frequency band that is broader than the first frequency band.

3. The module according to claim 1, in which the first receiver means are responsive to signals at frequencies lying in a first frequency band, and the second receiver means are responsive to signals lying in a second frequency band that is disjoint from the first frequency band.

4. The module according to claim 1, in which the first receiver means include means forming a narrow bandpass filter and the second receiver means include means forming a broad bandpass filter functionally arranged upstream from the means forming a narrow bandpass filter in the propagation direction of a signal received by the module.

5. The module according to claim 1, including inhibit means for inhibiting signals received by the second receiver means, e.g. comprising means forming a filter or timer means.

6. The module according to claim 1, in which the carrier currents travel in an electric circuit connecting an electric power supply battery to an electrical member of a motor vehicle.

7. A method of managing the operation of a module according to claim 1, wherein the module is selectively put into a sleep state or into an operational state by respectively deactivating or activating the first receiver means, the second receiver means being active in both the sleep state and in the operational state.

8. The method according to claim 7, in which for the first receiver means being designed to receive management signals and the module being initially in an operational state, the module is switched to a sleep state after a predetermined time lapse following reception of a management signal requesting the module to go to sleep.

9. The method according to claim 8, in which the time lapse terminates after the management signals have ceased to be received.

10. The method according to claim 9, in which the management signals are formed using a modulated carrier wave, management signals ceasing to be received corresponding to the carrier wave ceasing to be received.

11. The method according to claim 9, in which the time lapse begins after the management signals cease to be received.

12. The method according to claim 9, in which:

on receiving the management signal requesting the module to go to sleep, the module is authorized to transmit only in response to management signals; and

the management signals cease to be received after the module has acknowledged proper reception of the management signal requesting it to go to sleep, in response to a management signal requesting an acknowledgment.

13. The method according to claim 9, in which the time lapse begins before the management signals cease to be received.

14. The method according to claim 7, in which:

for the module being initially in a sleep state, when the second receiver means receive a wakeup signal, the first receiver means are activated in order to put the module in an operational state;

the signal received by the module is observed over a predetermined observation time to determine whether it is meaningful; and

the module is returned to a sleep state if, at the end of the observation time, it is concluded that the signal received by the module is not meaningful.

15. The method for managing the operation of a module according to claim 5, in which method, when the module is in a sleep state, signals received by the second receiver means are inhibited for a predetermined inhibit time, wherein the module is selectively put into a sleep state or into an operational state by respectively deactivating or activating the first receiver means, the second receiver means being active in both the sleep state and in the operational state.

16. The method according to claim 15, in which, for the module initially being in a sleep state, on the second receiver means receiving a wakeup signal of duration longer than the inhibit time, the first receiver means are activated in order to put the module an operational state.

17. A method of managing the operation of at least two modules, the operation of each module being managed by a method according to claim 15, wherein the inhibit times of the modules are different.