Method and device for transmitting information over a complex network

• US 7,995,592 B2
• Filed: 09/11/2007
• Issued: 08/09/2011
• Est. Priority Date: 09/14/2006
• Status: Expired due to Fees

• Current Assignee: EDELCOM Company
• Original Assignee: EDELCOM Company
• Inventors: Duranton, Rene
• Primary Examiner(s): Ngo; Ricky
• Assistant Examiner(s): NG, CHRISTINE Y
• Application Number:
  US12/310,978
• Publication Number:
  US 20090310623A1
• Time in Patent Office: 1,428 Days
• Field of Search: 370/389, 370/392, 370/401, 370/465, 370/475, 370/405
• US Class Current: 370/401
• CPC Class Codes: H04L 12/403 with centralised control, e.g. polling
• CPC Class Codes: H04L 12/4625 Single bridge functionality, e.g. connection of two networks over a single bridge
• CPC Class Codes: H04L 61/5038 for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
• CPC Class Codes: H05B 47/185 via power line carrier transmission

Abstract

The method of the invention comprises firstly prior allocation of an identifier to each module that might be concerned by the messages transmitted over the network, and when the module is installed on the network, associating said identifier with data relating to the geographical position of the location where the module is installed, in such a manner as subsequently to be able to identify the location of the module independently of its position in the network, and secondly, when sending a message over the network to a module, the modules that are capable of receiving the message, recognizing said message, and modules that have received the message systematically and synchronously repeating said message until the message has been transmitted over the entire network and all of the modules have received and re-sent the message at least once.

Claims

1. A method of transmitting a message by carrier current modulation over an electrical power distribution network for public lighting lamps having connected thereto a central unit or a zone unit together with a plurality of control/check modules that might be concerned by the message, the method comprising:

initially allocating to a module an identifier, and on installing the module in a position in the network, associating said identifier with data relating to a geographical location where the module is installed, so as to make it possible subsequently to identify the geographical location of the module from its identifier, independently of its installed position in the network; and

when sending a message over the network to the module and/or to the central unit, recognizing and/or validating the message in the modules that are connected to the network and that are suitable for receiving the message, and systematically and synchronously repeating the message over the network by means of those modules that have recognized and/or validated the messages, this repetition of messages enabling other modules to become able to receive the message, and after recognition and/or validation, of resending the message in turn, such that from each repetition, other modules understand the message and are able to resend the message again, this process repeating until the message has been sent over the entire network and all of the modules have received the message and resent the message at least once.

2. A method according to claim 1, wherein the modules resend messages in synchronous manner, and wherein the resending is synchronized by the operating frequency of crystal-clocked microprocessors forming part of said modules.

3. A method according to claim 2, wherein the resending of messages is synchronized on the basis of the instant at which the message is found to be valid by the microprocessor located in each module.

4. A method according to claim 1, wherein message sending is triggered by the central unit or by a zone unit.

5. A method according to claim 1, wherein said modules are control/check modules of the public lighting lamps.

6. A method according to claim 5, wherein the control/check modules comprise a crystal-clocked processor connected to a network interface that is connected to the electricity power distribution network via two circuits, comprising:

a receive circuit having a receive amplifier; and

a second circuit having a send amplifier.

7. A method according to claim 5, wherein the electricity power distribution network makes use of electricity cabinets, each cabinet powering lighting lamps in a determined zone via a distribution network having a tree structure, tree structure networks of different zones being capable of being interconnected by couplers enabling messages to be sent from one zone to another while leaving the electricity power distribution networks mutually isolated, the zones connected together by one or more couplers constituting a sector having a transmission unit identified by an internal number associated with the cabinets, said transmission unit being capable of communicating with a remote processor, and wherein each message comprises:

a preamble;

a message order number;

an identity of an origin of the message relying on an identifier of the remote processor, of the transmission unit, of the zone unit, or of the module;

an internal number of a sender;

a zone number and, optionally, an outgoing line number;

a number of a destination or destination group concerned;

setpoint data; and

check data for checking the message using a predetermined algorithm.

8. A method according to claim 1, wherein an operating sequence executed by the module comprises the following operations:

a first stage of executing internal processing;

a second stage of detecting a presence of a carrier on the network, and returning to the first stage in an absence of the carrier, otherwise moving on to a third stage;

the third stage of detecting carrier modulation and a beginning of the message, returning to the first stage if no meaningful modulation is detected, otherwise moving on to a stage of decoding the message and then on to a stage of checking the validity of the message;

a fourth stage of validating the message and returning to the second stage if the message is not valid, otherwise moving on to a following stage;

a fifth stage of determining an existence or an absence of a new message, returning to the first stage if no new message is detected, otherwise moving on to a next stage;

a sixth stage of storing the new message in a memory of the module;

a seventh stage of resending the message over the network, this stage being triggered after an accurate time lapse from an origin determined by an end of the new message; and

an eighth stage of processing the new message.

9. A method of transmitting a message by carrier current modulation over an electrical power distribution network for public lighting lamps having connected thereto a central unit or a zone unit together with a plurality of control/check modules that might be concerned by the message, the method comprising:

initially allocating to a module an identifier, and on installing the module in a position in the network, associating said identifier with data relating to a geographical location where the module is installed, so as to make it possible subsequently to identify the geographical location of the module from its identifier, independently of its installed position in the network; and

when sending a message over the network to the module and/or to the central unit, recognizing and/or validating the message in the modules that are connected to the network and that are suitable for receiving the message, and systematically and synchronously repeating the message over the network by means of those modules that have recognized and/or validated the messages, this repetition of messages enabling other modules to become able to receive the message, and after recognition and/or validation, of resending the message in turn, such that from each repetition, other modules understand the message and are able to resend the message again, this process repeating until the message has been sent over the entire network and all of the modules have received the message and resent the message at least once, wherein;

said network is an electricity power distribution network for public lighting lamps, and wherein said modules are control/check modules of the lighting lamps, and

the electricity power distribution network makes use of electricity cabinets, each cabinet powering lighting lamps in a determined zone via a distribution network having a tree structure, tree structure networks of different zones being capable of being interconnected by couplers enabling messages to be sent from one zone to another while leaving the electricity power distribution networks mutually isolated, the zones connected together by one or more couplers constituting a sector having a transmission unit identified by an internal number associated with the cabinets, said transmission unit being capable of communicating with a remote processor, and wherein each message comprises;

a preamble;

a message order number;

an identity of an origin of the message relying on an identifier of the remote processor, of the transmission unit, of the zone unit, or of the module;

an internal number of a sender;

a zone number and, optionally, an outgoing line number;

a number of a destination or destination group concerned;

setpoint data; and

check data for checking the message using a predetermined algorithm.

10. A method of transmitting a message by carrier current modulation over an electrical power distribution network for public lighting lamps having connected thereto a central unit or a zone unit together with a plurality of control/check modules that might be concerned by the message, the method comprising at least the following steps:

initially allocating to a module an identifier, and on installing the module in a position in the network, associating said identifier with data relating to a geographical location where the module is installed, so as to make it possible subsequently to identify the geographical location of the module from its identifier, independently of its installed position in the network; and

when sending a message over the network to the module and/or to the central unit, recognizing and/or validating the message in the modules that are connected to the network and that are suitable for receiving the message, and systematically and synchronously repeating the message over the network by means of those modules that have recognized and/or validated the messages, this repetition of messages enabling other modules to become able to receive the message, and after recognition and/or validation, of resending the message in turn, such that from each repetition, other modules understand the message and are able to resend the message again, this process repeating until the message has been sent over the entire network and all of the modules have received the message and resent the message at least once, wherein an operating sequence executed by the module comprises the following operations;

a first stage of executing internal processing;

a second stage of detecting a presence of a carrier on the network, and returning to the first stage in an absence of the carrier, otherwise moving on to a third stage;

the third stage of detecting carrier modulation and a beginning of the message, returning to the first stage if no meaningful modulation is detected, otherwise moving on to a stage of decoding the message and then on to a stage of checking the validity of the message;

a fourth stage of validating the message and returning to the second stage if the message is not valid, otherwise moving on to a following stage;

a fifth stage of determining an existence or an absence of a new message, returning to the first stage if no new message is detected, otherwise moving on to a next stage;

a sixth stage of storing the new message in a memory of the module;

a seventh stage of resending the message over the network, this stage being triggered after an accurate time lapse from an origin determined by an end of the new message; and

an eighth stage of processing the new message.