Data transmission system over building wiring

• US 4,675,668 A
• Filed: 01/13/1986
• Issued: 06/23/1987
• Est. Priority Date: 12/30/1982
• Status: Expired due to Fees

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Machino, Katsuyuki, Tanaka, Hidehiko, Ise, Masahiro, Terasaka, Teiji, Matsubara, Toshiyuki
• Primary Examiner(s): Weldon, Ulysses
• Application Number:
  US06/818,068
• Time in Patent Office: 526 Days
• Field of Search: 340/310 R, 340/310 A, 340/310 CP, 340/825.08, 340/825.18, 340/825.52, 375/3, 375/4, 179/170 J, 178/70 R, 455/14, 370/88
• US Class Current: 340/9.1
• CPC Class Codes: H02J 13/00007 using the power network as support for the transmission
• CPC Class Codes: H04B 2203/5408 using protocols
• CPC Class Codes: H04B 2203/5425 improving S/N by matching impedance, noise reduction, gain control
• CPC Class Codes: H04B 2203/5458 Monitor sensor; Alarm systems
• CPC Class Codes: H04B 2203/5466 using three phases conductors
• CPC Class Codes: H04B 2203/5491 using filtering and bypassing
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: Y02B 90/20 Smart grids as enabling technology in buildings sector smart grids supporting the management or operation of end-user stationary applications in general, or like technologies with no associated climate change mitigation effect Y04S20/00
• CPC Class Codes: Y04S 40/121 using the power network as support for the transmission

Abstract

A data transmission method over building wiring includes a plurality of transmission sections. One of these sections is selected from the plurality of transmission sections to be a data transmission source machine for providing data. The data is transmitted from the data transmission source to the remaining transmission sections. If a transmission section is not selected it is used to relay the data to one of the remaining transmission sections wherein it is received by a final data transmission section. A data transmission section used in the method, comprises a data receiving part for receiving the transmitted data, a relay counter part for counting the number of relaying the transmitted data, and data relaying part for steps of relaying the-received data.

Claims

1. A method of transmitting a data message from a selected transmitting one of a plurality of transmission sections to a selected receiving one of said transmission sections wherein each of said transmission sections is identified by a self address and said selected receiving one of said transmission sections is identified by a final data transmission address in said data message, said method comprising:

(a) transmitting said data message from said selected transmitting one of said plurality of transmission sections to at least one adjacently disposed one of said plurality of transmission sections;

(b) said adjacently disposed one of said plurality of transmission sections comparing its said self address to said final data transmission address, receiving said data message if there is a coincidence thereof, and relaying said data message to at least one of said plurality of transmission sections adjacently disposed thereto if there is no coincidence;

repeating step (b) until a said coincidence is detected;

wherein said data message includes a relay number indicative of a number of steps of relaying which have been performed;

wherein said transmission sections include a relay counter and a predetermined relay count;

said step of relaying including the steps of,

setting said relay counter of said adjacently disposed one of said plurality of transmission sections to said relay number;

comparing said relay counter to said predetermined relay count;

incrementing said relay number included in said data message prior to relay of said data message; and

completing said step of relaying when said relay counter equals said predetermined relay count.

2. The method of claim 1 wherein said step of transmitting transmits said data message to all adjacent ones of said plurality of transmission stations.

3. The method of claim 1 wherein said step of receiving includes steps of,

comparing said relay number to said predetermined relay count;

and

checking for an error if said relay number does not equal said predetermined relay count.