Local area network of serial intelligent cells

• US 8,908,673 B2
• Filed: 04/26/2007
• Issued: 12/09/2014
• Est. Priority Date: 07/28/1998
• Status: Expired due to Fees

• Current Assignee: MOSAID Technologies Inc. (f/k/a Conversant Intellectual Property Management)
• Original Assignee: MOSAID Technologies Inc. (f/k/a Conversant Intellectual Property Management)
• Inventors: Binder, Yehuda
• Primary Examiner(s): Pham, Chi H
• Assistant Examiner(s): Boakye, Alexander O
• Application Number:
  US11/790,555
• Publication Number:
  US 20070195719A1
• Time in Patent Office: 2,784 Days
• Field of Search: 370/436, 370/502, 370/535, 370/295, 370/337, 370/342, 370/343, 370/347, 370/441, 370/254, 370/908, 370/447, 340/310.11
• US Class Current: 370/351
• CPC Class Codes: H04B 2203/5437 Wired telephone
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/545 Audio/video application, e.g. interphone
• CPC Class Codes: H04B 2203/5458 Monitor sensor; Alarm systems
• CPC Class Codes: H04B 3/54 Systems for transmission via power distribution lines
• CPC Class Codes: H04B 3/542 the information being in digital form
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04L 12/2803 Home automation networks
• CPC Class Codes: H04L 12/2838 Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths adaptations of television systems for transmission by electric cable for domestic distribution H04N7/106; hybrid transport H04L12/6418; home network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 2012/2843 Mains power line
• CPC Class Codes: H04L 2012/2845 Telephone line
• CPC Class Codes: H04L 43/00 Arrangements for monitoring or testing data switching networks
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 67/00 Network arrangements or protocols for supporting network services or applications user-to-user messaging H04L51/00; network arrangements, protocols or services for supporting real-time applications in data packet communications networks H04L65/00
• CPC Class Codes: H04M 19/02 providing ringing current or supervisory tones, e.g. dialling tone or busy tone
• CPC Class Codes: Y10S 370/908 Local area network

Abstract

A serial intelligent cell (SIC) and a connection topology for local area networks using Electrically-conducting media. A local area network can be configured from a plurality of SIC'"'"'s interconnected so that all communications between two adjacent SIC'"'"'s is both point-to-point and bidirectional. Each SIC can be connected to one or more other SIC'"'"'s to allow redundant communication paths. Communications in different areas of a SIC network are independent of one another, so that, unlike current bus topology and star topology, there is no fundamental limit on the size or extent of a SIC network. Each SIC can optionally be connected to one or more data terminals, computers, telephones, sensors, actuators, etc., to facilitate interconnectivity among such devices. Networks according to the present invention can be configured for a variety of applications, including a local telephone system, remote computer bus extender, multiplexers, PABX/PBX functionality, security systems, and local broadcasting services. The network can use dedicated wiring, as well as existing wiring as the in-house telephone or electrical wiring.

Claims

1. A device for coupling data signals and DC power to or from first and second wirings that simultaneously carry said DC power and said data signals, said device comprising:

a first transceiver communicatively coupled to said first wiring for full-duplex serial data communication thereover;

a first transformer coupled to pass only first data signals between said first wiring and said first transceiver;

a second transceiver communicatively coupled to said second wiring for full-duplex serial data communication thereover;

a second transformer coupled to pass only second data signals between said second wiring and said second transceiver;

a third transceiver communicatively coupled to a third wiring for full-duplex data communication thereover;

a power supply coupled to each of said first and second transformers through a respective center-tap to provide said DC power onto said first and second wirings; and

a single enclosure housing said first, second and third transceivers, said first and second transformers and said power supply, wherein;

said third transceiver is communicatively coupled to said first transceiver for passing third data signals between said third and first wirings;

said third transceiver is communicatively coupled to said second transceiver for passing fourth data signals between said third and second wirings;

said device is configured to multiplex said first and second data signals onto said third wiring; and

said device is addressable in a network.

2. The device according to claim 1, wherein said device is connectable to a power source to receive and couple power to said power supply.

3. The device according to claim 1, wherein a data rate on said third wiring is higher than data rates on said first and second wirings.

4. The device according to claim 1, wherein at least one of said first and second wirings includes a twisted wire pair that is connected to carry only said DC power.

5. The device according to claim 1, wherein said DC power is carried over a respective wiring using distinct, dedicated wiring.

6. The device according to claim 1, wherein said DC power and data are carried over same wire pairs in at least one of said wirings.

7. The device according to claim 6, wherein said DC power and said data are carried frequency multiplexed over said at least one of said wirings.

8. The device according to claim 1, wherein said device has a manually assigned address.

9. The device according to claim 1, wherein said device has an automatically assigned address.

10. The device according to claim 1, wherein said device has an address assigned by a unit communicating with said device.

11. The device according to claim 1, wherein said device is further connectable to one or more data terminal equipments (DTE).

12. The device according to claim 1, wherein at least one of said data signals includes a digitized telephony signal.

13. The device according to claim 12, wherein said device is connectable to a telephone unit.

14. The device according to claim 1, wherein said device is further addressable in a Local Area Network (LAN).

15. The device according to claim 1, wherein:

at least one of said transceivers is a Local Area Network (LAN) transceiver; and

at least one wiring is a LAN wiring.

16. The device according to claim 15, wherein:

at least one of said transceivers is an Ethernet transceiver, and at least one of said wirings is an Ethernet wiring.

17. The device according to claim 1, wherein at least one of said wirings is connected to perform packet-based data communication.

18. The device according to claim 1, wherein communication over said first wiring is independent of communication over said second wiring.

19. The device according to claim 1, wherein:

said device further functions as a time domain multiplexer providing a bandwidth shareable by said first and second wirings.

20. The device according to claim 1, wherein:

data carried over said third wiring comprises distinct first and second data streams; and

said device is operative to pass only said first data stream between said first and third wirings and to pass only said second data stream between said second and third wirings.

21. The device according to claim 1, wherein said first and second transceivers are Ethernet transceivers.

22. The device according to claim 1, wherein said first, second and third transceivers are Ethernet transceivers, and said third transceiver supports a higher data rate than said first and second transceivers.

23. A system for carrying DC power and data signals over a plurality of wirings for use with at least one equipment that is a source or destination of data, said system comprising:

first, second and third devices, each of said devices containing at least one power consuming circuit; and

first and second wirings in a building, each of said wirings comprising at least two conductors, said first wiring being connected for coupling said first and second devices to form a first data bi-directional communication link and said second wiring being connected for coupling said first and third devices to form a second digital data bi-directional communication link;

wherein;

each of said first and second wirings is connected to simultaneously carry both power and data signals;

each of said devices is either an equipment that is a source or destination of data, or is connectable to an equipment that is a source or destination of data;

at least one of said first, second and third devices is connectable to a power source for coupling said power source to said first and second wirings; and

at least two of said first, second and third devices are powered only by power carried over the respective wiring connected to said devices.

24. The system according to claim 23 wherein at least one of said devices is wall mountable in said building.

25. The system according to claim 23 wherein communication over said first communication link does not preclude communication over said second communication link.

26. The system according to claim 23, wherein a same protocol is used on both said first and second communication links.

27. The system according to claim 23, wherein at least part of at least one of said first and second wirings is in at least one wall of said building and is connected via an outlet.

28. The system according to claim 23, wherein said DC power and data are carried in at least one of said wirings over separate wires.

29. The system according to claim 23, wherein said DC power and data are carried in at least one of said wirings over said same wires.

30. The system according to claim 29, wherein said DC power and the data are carried frequency multiplexed over said at least one of said wirings.

31. The system according to claim 23, wherein at least one of said devices is addressable in a network.

32. The system according to claim 31, wherein said at least one of said devices has a manually assigned address.

33. The system according to claim 31, wherein said at least one of said devices has an automatically assigned address.

34. The system according to claim 31, wherein said at least one of said devices has an address assigned by a data terminal equipment (DTE) communicating with said at least one of said devices.

35. The system according to claim 31, wherein said at least one of said devices is addressable in a local area network.

36. The system according to claim 23, wherein at least one of said communication links is connected to carry a digitized telephony signal.

37. The system according to claim 36, wherein at least one of said devices is further a telephone unit or is connectable to a telephone unit.

38. A device for coupling first, second and third wirings, each wiring being connected for carrying a respective one of first, second and third full-duplex data signals, said device further being operative for supplying DC power, said device comprising:

a first transceiver communicatively coupled to said first wiring for full-duplex packet-based data communication over said first wiring;

a second transceiver communicatively coupled to said second wiring for full-duplex packet-based data communication over said second wiring;

a third transceiver communicatively coupled to said third wiring for full-duplex packet-based data communication over said third wiring;

a DC power supply for supplying said DC power to be carried over said first and second wirings; and

a single enclosure housing said first, second and third transceivers and said DC power supply,

wherein;

said first, second and third transceivers are communicatively coupled to pass data between said wirings;

said device is configured to multiplex said first and second full-duplex data signals onto said third wiring; and

said device is addressable in a network.

39. The device according to claim 38, wherein said data signals carried over one of said wirings is independent of data signals carried over said other wirings.

40. The device according to claim 38, wherein a data rate on said third wiring is higher than data rates on said first and second wirings.

41. The device according to claim 38, wherein:

said data signals carried over said third wiring comprises distinct first and second data streams; and

said device is operative to pass only said first data stream between said first and third wirings and to pass only said second data stream between said second and third wirings.

42. The device according to claim 38, wherein said device has a manually assigned address.

43. The device according to claim 38, wherein said device has an automatically assigned address.

44. The device according to claim 38, wherein said device has an address that is assigned by a unit coupled to said device through a local area network.

45. The device according to claim 38, wherein:

said wirings are local area network wirings.

46. The device according to claim 38, wherein said transceivers are Ethernet transceivers.

47. The device according to claim 38, wherein said device is constructed to have at least one of the following:

a form substantially similar to that of a standard outlet;

wall mounting elements substantially similar to those of a standard wall outlet;

a shape allowing direct mounting in an outlet opening or cavity; and

a form to substitute for a standard outlet.

48. The device according to claim 38, wherein said device is wall-mountable.

49. The device according to claim 38, wherein said device is mountable into an outlet cavity.

50. The device according to claim 38, wherein said DC power is carried over at least one of said wirings using one or more dedicated twisted wire pairs separated from one or more other twisted wire pairs carrying a full duplex data signal.

51. The device according to claim 38, wherein DC power and full duplex data signals are carried together over the same wires.

52. The device according to claim 51, further comprising a transformer coupled for passing only data signals between one of said wirings carrying DC power and the respective transceiver that is communicatively coupled to said one of said wirings.

53. The device according to claim 38, further comprising firmware and a processor executing said firmware, said processor being coupled to control all said transceivers.

54. The device according to claim 38, further comprising a current limiter between said DC power supply and said first wiring for limiting DC current flow into said first wiring.

55. The device according to claim 54 wherein said current limiter is a fuse.

56. The device according to claim 54, wherein said device is further operative to measure said DC current supplied to said first wiring.

57. The device according to claim 38, wherein said device is further operative for on/off control of said DC power from said DC power supply to said first wiring.

58. The device according to claim 57, wherein said on/off control effected by said device is responsive to a data signal.

59. The device according to claim 38, wherein said device is addressable in a local area network.

60. The device according to claim 38, wherein said first and second transceivers are Ethernet transceivers.

61. The device according to claim 38, wherein said first, second and third transceivers are Ethernet transceivers, and said third transceiver supports a higher data rate than said first and second transceivers.

62. A network for coupling data signals and DC power, said network comprising:

first, second and third devices, each enclosed in a single enclosure and addressable in said network; and

first and second wirings in a building, each of said wirings being connected to concurrently carry data signals and DC power,

wherein;

said first and second devices are connected by said first wiring for full-duplex, packet-based data communication between said first and second devices;

said first and third devices are connected by said second wiring for full-duplex, packet-based data communication between said first and third devices;

said first device is further capable of providing DC power to said first and second wirings;

said second device is capable of being powered by DC power carried over said first wiring; and

said third device is capable of being powered by DC power carried over said second wiring.

63. The network according to claim 62, wherein data signals carried over said first wiring are independent of data signals carried over said second wiring.

64. The network according to claim 62, wherein:

said network is further operative as a multiplexer; and

at said first device is connected to a high data rate connection whose bandwidth is multiplexed to at least one of said wirings.

65. The network according to claim 62, wherein at least one of said devices has a manually assigned address.

66. The network according to claim 62, wherein at least one of said devices has an automatically assigned address.

67. The network according to claim 62, wherein at least one of said devices has an address assigned by a unit coupled to said at least one of said devices through a local area network.

68. The network according to claim 62, wherein said wirings are local area network wirings and are connected using local area network connectors.

69. The network according to claim 62, wherein said data communication is Ethernet based.

70. The network according to claim 62, wherein at least one of said devices is further constructed to have at least one of the following:

a form substantially similar to that of a standard outlet;

wall mounting elements substantially similar to those of a standard wall outlet;

a shape allowing direct mounting in an outlet opening or cavity; and

a form to substitute for a standard outlet.

71. The network according to claim 62, wherein at least one of said devices is wall-mountable in said building.

72. The network according to claim 62, wherein at least one of said devices is mountable into an outlet cavity.

73. The network according to claim 62, wherein each of said wirings comprises at least one first twisted wire pair connected for carrying DC power and at least one second twisted wire pair, separate from said first twisted wire pair, connected for carrying full duplex data signals.

74. The network according to claim 62, wherein said wirings are connected for carrying DC power full duplex data signals together over said same wires.

75. The network according to claim 62, further comprising a current limiter for limiting said DC current flowing into said first wiring.

76. The network according to claim 75, wherein said current limiter is a fuse.

77. The network according to claim 62, wherein at least one of said first, second and third devices is addressable in a local area network.

78. An apparatus for time domain multiplexing/de-multiplexing between a high data rate connection and multiple low data rate connections, for use with local area network wiring segments in a building, each segment being connected to carry full duplex data signals, said apparatus comprising:

a plurality of low data rate connectors, each for connecting to a distinct local area network wiring segment;

a plurality of low data rate transceivers, each coupled to a respective one of said low data rate connectors, for transmitting and receiving full-duplex serial data signals with the respective local area network wiring segment;

a high data rate connector for connecting to one of said local area network wiring segments; and

a high data rate transceiver coupled to said high data rate connector for transmitting and receiving full-duplex serial data signals with said one of the local area network wiring segments,

wherein;

said apparatus is capable of operating as a time-domain demultiplexer and as a time-domain multiplexer;

data signals received from said high data rate connector are capable of being divided into multiple distinct streams and each distinct stream is transmitted into one of said plurality of low data rate connectors,

data signals received from said plurality of low data rate connectors are capable of being combined into a single data stream that can then be transmitted to said high data rate connector; and

said apparatus is addressable in a local area network,

wherein;

at least one of said local area network wiring segments is connected to concurrently carry DC power together with said full-duplex data signals;

said apparatus further comprises;

an AC power connector for connecting to powerline wiring to receive AC power therefrom; and

an AC/DC power supply connected to said AC power connector to be power fed by said AC power and to supply DC power, and

said AC/DC power supply is coupled to at least one of said connectors for feeding DC power onto said wiring.

79. The apparatus according to claim 78, wherein said apparatus has a manually assigned address.

80. The apparatus according to claim 78, wherein said apparatus has an automatically assigned address.

81. The apparatus according to claim 78, wherein said apparatus has an address that is assigned by a data unit coupled to said apparatus through a local area network.

82. The apparatus according to claim 78, wherein each one of said high data rate and low data rate transceivers is operative for point-to-point communication only with a single mating transceiver of substantially a same type.

83. The apparatus according to claim 78, wherein each one of said high data rate and low data rate transceivers is a local area network transceiver.

84. The apparatus according to claim 83, wherein each one of said high data rate and low data rate transceivers is an Ethernet transceiver and each one of said low data rate and high data rate connectors is an Ethernet connector.

85. The apparatus according to claim 78, further comprising a single enclosure housing said transceivers and connectors, wherein said single enclosure is constructed to have at least one of the following:

a form substantially similar to that of a standard outlet;

wall mounting elements substantially similar to those of a standard wall outlet;

a shape allowing direct mounting in an outlet opening or cavity; and

a form to substitute for a standard outlet.

86. The apparatus according to claim 78 further comprising a single enclosure housing said transceivers and connectors, wherein said single enclosure is wall mountable.

87. The apparatus according to claim 78, further comprising a single enclosure housing said transceivers and connectors, wherein said single enclosure is mountable into an outlet cavity.

88. The apparatus according to claim 78, wherein one or more dedicated twisted wire pairs of at least one of said segments are connected for carrying said DC power, which dedicated twisted wire pairs are separated from one or more other twisted wire pairs connected for carrying a full duplex data signal.

89. The apparatus according to claim 78, wherein said DC power and a full duplex data signal are carried together over same twisted wire pairs of at least one of said segments.

90. The apparatus according to claim claim 78, further comprising a current limiter coupled between said AC/DC power supply and a connector for limiting DC current flowing into said wiring segment connected to said at least one connector.

91. The apparatus according to claim 90, wherein said current limiter is a fuse.

92. The apparatus according to claim 78, wherein said apparatus is further operative to measure DC current supplied to one of said wiring segments.

93. The apparatus according to claim 78, further comprising one or more transformers coupled for passing only a data signal between a connector connected to a wiring segment that is also connected to carry DC power and a respective transceiver.

94. The apparatus according to claim 78, further comprising firmware and a processor for executing said firmware, said processor being coupled to control all of said transceivers.

95. A network for carrying data and power signals, said network comprising:

first, second and third nodes, each of said nodes containing at least one power consuming circuit; and

first and second wiring segments in a building, each of said segments comprising at least two conductors, said first wiring segment coupling said first and second nodes to form a first bi-directional communication link and said second wiring segment coupling said first and third nodes to form a second bi-directional communication link,

wherein;

at least one of said first and second wiring segments is connected for simultaneously carrying both data and power signals;

said first communication link is connected to carry data independent of data carried by said second communication link;

each of said first, second and third nodes is connectable to a data terminal equipment unit for coupling said data terminal equipment unit to at least one of said first and second communication links;

at least one of said first, second and third nodes is connectable to a power source for coupling said power source to at least one power signal over one of said first and second wiring segments connected to said first node; and

at least said second node is powered by a power signal carried over said first wiring segment connected to said second node.

96. The network according to claim 95, wherein at least one of said first, second and third nodes is included in an outlet.

97. The network according to claim 96, wherein at least one of said first, second and third nodes is included in one of a telephone outlet and a power outlet.

98. The network according to claim 95, wherein at least one of said first and second wiring segments is composed of wiring previously installed in said building.

99. The network according to claim 95, wherein at least one of said first and second wiring segments is one of:

telephone wiring; and

power wiring.

100. The network according to claim 95, wherein said power signal is carried over at least one of said first and second wiring segments using distinct/dedicated wiring.

101. The network according to claim 95, wherein said power and data signals are carried frequency multiplexed over at least one of said first and second wiring segments.

102. The network according to claim 95, wherein at least one of said first, second and third nodes is addressable.

103. The network according to claim 102, wherein said at least one of said first, second and third nodes has a manually assigned address.

104. The network according to claim 102, wherein said at least one of said first, second and third nodes has an automatically assigned address.

105. The network according to claim 102, wherein said at least one of said first, second and third nodes has an address assigned by a data terminal equipment unit connected to said at least one of said first, second and third nodes.

106. The network according to claim 102, wherein said at least one of said first, second and third nodes is addressable in a local area network.

107. The network according to claim 95, further comprising an enclosure of a data terminal equipment unit housing at least one of said first, second and third nodes.

108. The network according to claim 95, wherein at least one of said first and second communication links is connected to carry a digitized telephony signal.

109. The network according to claim 95, wherein at least one of said first, second and third nodes is further connectable to a telephone unit.

110. The network according to claim 95, further comprising a power connector coupled to receive a power signal carried by said network for powering said at least one power consuming circuit contained in one of said first, second and third nodes.

111. The network according to claim 95, wherein said power signal is a direct current signal.

112. A system for distribution of an audio signal in a building, said system comprising:

first, second and third devices, each of said devices comprising at least one power consuming circuit and a single enclosure housing said at least one power consuming circuit; and

first and second Local Area Network (LAN) wirings in said building, said wirings being at least in part in walls of said building and connected to said devices via an outlet opening or outlet cavity,

wherein;

said first wiring connects said first and second devices together and said second wiring connects said first and third devices together;

each of said first and second wirings is connected to simultaneously carry both DC power and analog audio signals;

at least a first one of said devices is connectable to a power source for coupling said power source to said first and second wirings;

at least said second and third devices are powered only by DC power carried over the respective wiring connected to said devices;

at least said second and third devices are wall mounted in said building; and

said system is operative to carry an analog audio signal received by one of said devices to at least one another one of said devices.

113. The system according to claim 112, wherein each one of at least two of said devices is mountable onto an a respective outlet opening or outlet cavity.

114. The system according to claim 112, wherein said second and third devices are further constructed to have at least one of the following:

a form substantially similar to that of a standard outlet;

wall mounting elements substantially similar to those of a standard wall outlet;

a shape allowing direct mounting in an outlet opening or cavity; and

a form to substitute for a standard outlet.

115. The system according to claim 112, wherein said second and third devices are connectable to an audio analog actuator for creating a physical phenomenon.

116. The system according to claim 115, wherein said analog actuator is a speaker.

117. The system according to claim 116, wherein said analog audio signal is part of an analog telephone signal, and said speaker is part of an analog telephone set.

118. The system according to claim 112, wherein at least one of said devices is connectable to an audio analog sensor for sensing a physical phenomenon.

119. The system according to claim 118, wherein said analog sensor is a microphone.

120. The system according to claim 119, wherein said analog audio signal is part of an analog telephone signal, and said microphone is part of an analog telephone set.

121. The system according to claim 112, wherein said wirings are Ethernet wirings, and each wiring is connected to a respective one of said devices via a respective Ethernet connector.

122. The system according to claim 112, wherein each of said second and third devices further comprises a respective visual indicator for indicating a status, said visual indicators being coupled to be powered by DC power carried over said wirings.

123. The system according to claim 122, wherein said visual indicator is a LED.

124. The system according to claim 112, wherein said DC power is carried in said wirings over dedicated wires separate from wires carrying said analog audio signal.

125. The system according to claim 112, wherein said DC power is carried in said wirings over same wires carrying said analog audio signal.

126. The system according to claim 112, wherein each of said second and third devices further comprises a respective DC/DC converter coupled to be powered by said DC power.

127. The system according to claim 112, wherein said system is operative to function as at least one of:

an intercom;

a PBX;

a PABX;

an entertainment signal broadcasting; and

an audio distribution system.

128. The system according to claim 112, wherein said audio signal carried over said first wiring does not preclude any other audio signal to be carried over said second wiring.

129. A method carried out in a device that couples data signals and DC power to or from first and second wirings that simultaneously carry said DC power and said data signals, said device including a single enclosure housing first, second and third transceivers, first and second transformers, and a power supply, and the method comprising:

carrying out full-duplex serial data communication over all of said first and second wirings and a third wiring, enabled by said first, second and third transceivers respectively;

establishing communication between said third transceiver and said first transceiver for passing third data signals between said third and first wirings;

establishing communication between said third transceiver and said second transceiver for passing fourth data signals between said third and second wirings;

employing said first transformer to pass only first data signals between said first wiring and said first transceiver;

employing said second transformer to pass only second data signals between said second wiring and said second transceiver;

providing said DC power onto said first and second wirings from said power supply that is coupled to each of said first and second transformers through a respective center-tap; and

multiplexing said first and second data signals onto said third wiring; and

addressing said device in a network.

130. The method according to claim 129, wherein a data rate on said third wiring is higher than data rates on said first and second wirings.

131. The method according to claim 129, wherein said DC power and data are carried over same wire pairs in at least one of said wirings.

132. The method according to claim 131, wherein said DC power and said data are carried frequency multiplexed over said at least one of said wirings.

133. The method according to claim 129, wherein an address defining the addressing is a manually assigned address.

134. The method according to claim 129, wherein an address defining the addressing is an automatically assigned address.

135. The method according to claim 129, wherein an address defining the addressing is assigned by a unit communicating with said device.

136. The method according to claim 129, wherein the addressing said device in a network is addressing said device in a local area network.

137. The method according to claim 129, wherein communication over said first wiring is independent of communication over said second wiring.

138. The method according to claim 129, wherein the multiplexing is time domain multiplexing.