JPH11340974A - Method and equipment for indoor cable communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To remotely control the local communication environment of multiple channels and the ON/OFF of a household equipment power source by superimposing a signal, with which another code division multi-access(CDMA) device is shifted from standby state to active state, on the CDMA signal of indoor wiring. SOLUTION: This system is provided with an ISDN line 11, an indoor wiring 32, a digital subscriber unit(DSU) 13, a CDMA communication equipment 34 and a general communication equipment or computer 36. In the case of the CDMA, a digital signal and a key code signal for modulation are superimposed by keying operation and multi-channel data communication is performed by changing the key code signal while using the same frequency band in a communication system for spreading the spectrum of the digital signal over wide bands. The CDMA communication of multi-channel is allocated to a high frequency range, conventional analog telephone communication is allocated to a low frequency range and a special signal in the low frequency range is allocated to every communication equipment so that the relevant equipment is changed from standby state to active state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology for constructing a multi-channel indoor digital communication environment using existing telephone line equipment and for reducing standby power of communication and home electric appliances installed indoors.

[0002]

2. Description of the Related Art Conventionally, two methods have been proposed as methods for constructing an indoor data communication network using a digital public line such as ISDN.

[0003] A first conventional technique is to use a DSU (Digital Subscriber Unit) and a TA (Terminal Adapter). FIG. 1 shows this, 11 is an ISDN line, 12 is an indoor wiring composed of two two-wire stranded wires, 13 is a DSU, 14 is a TA, and 16 is a general communication device or computer. In this configuration, the DSU communicates with the TA and i-interface through the indoor wiring.
To exchange data. This configuration is not possible with a telephone line consisting of a single two-wire twisted wire which is conventionally installed in a home, and in this method, the ISDN i-interfa
There is a disadvantage that only two lines defined by the CE standard can be used.

[0004] A second method is to use an Ether network for indoor wiring. FIG. 2 shows this, 11 is an ISDN line, 22 is an indoor wiring composed of two two-wire strands, 13 is a DSU, 24 is a router for an Ether network, and 26 is an Ether-compatible communication device. Or a computer. The Ether network is a method that is very generally used as a local area network of a business office or the like. Although this method can easily construct a multi-channel local communication environment, it has a drawback that it is not possible to use a telephone line consisting of a single two-wire twisted wire conventionally installed in a home. .

[0005] Further, there is no mechanism or method for remotely controlling ON / OFF of the power of home appliances using the communication environment in these communication methods.

[0006]

SUMMARY OF THE INVENTION The present invention provides a multi-channel local communication using a telephone line consisting of a single two-wire twisted wire conventionally installed in a home without additional wiring work in the home. It is an object of the present invention to provide a communication method and a communication device that enable remote control of ON / OFF of an environment and home appliances using a local communication environment.

[0007]

SUMMARY OF THE INVENTION According to the present invention, a DSU coupled to an ISDN and a plurality of indoor communication devices are coupled with a two-wire stranded cable, CDMA multiplexed and transmitted, and a CDMA device is changed from a standby state to an operating state. The transition to is performed by an external signal or a signal superimposed on the CDMA signal.

[0008]

FIG. 3 shows an embodiment of the first aspect of the present invention. 11 is an ISDN line, 32 is an indoor wiring composed of one two-wire stranded wire, 13 is a DSU, 34 is a CDMA communication device, and 36 is a general communication device or computer.

CDMA is a communication system in which a digital signal and a key code signal for modulation are superimposed by tapping operation to spread the spectrum of the digital signal over a wide band. The same frequency band is used, and multi-channel data communication is performed by changing the key code signal. Is what you do. If this method is used for priority transmission and the frequency band used is higher than the voice band, voice communication such as conventional telephones on the low frequency side will not be disturbed by CDMA signals, and can be performed in exactly the same way as conventional. .

In this configuration, the DSU and general communication equipment are C
Data is exchanged with the DMA communication device via indoor wiring. Further, as shown in FIG. 4, multi-channel CDMA communication is assigned to the high frequency region, conventional analog telephone communication is assigned to the low frequency region, and a special signal in the low frequency region is assigned to each communication device, and this signal appears on the line. And the device to which the signal is assigned shifts from the standby state to the operating state. For example, when a dial tone is assigned, a device in the home can be shifted from a standby state to an operating state by telephone from outside.

In addition, a personal computer or the like installed indoors can generate a special signal to shift another personal computer installed indoors from a standby state to an operating state.

Further, when communication is performed between a large number of devices by using one communication path, it is necessary to prevent a double access in which an already used channel is used repeatedly. However, in the conventional CDMA system, the data currently flowing through the communication line must be decoded with all key codes to detect the currently used channel. Since the used device can be identified only by detecting, if the used channel of the used device is known in advance, the already used channel can be easily detected and double access can be prevented. Can be. The first item of the present invention is the case where the first CDMA communication device collectively owns this double access prevention mechanism. The second item of the present invention is a case where each of the CDMA communication apparatuses has the dual access prevention mechanism in a distributed manner.

The third and fourth aspects of the present invention are the CDM of the first aspect.
A implements the communication device. FIG. 5 shows a third embodiment of the present invention.
It is an example of the section. A digital data transmitting / receiving unit (51) for transmitting / receiving data to / from a DSU / ONU or a computer / communication device; a CDMA modulation / demodulation unit (52) for mutually converting digital data and CDMA signals;
A communication device having a CDMA signal transmission / reception unit (53) for performing multi-channel communication using a CDMA signal with a communication device,
A standby control mechanism (54) for detecting a signal of a specific frequency or a specific voltage superimposed on the signal and shifting from a standby state to an operating state; and a mechanism (55) for superimposing a signal of a specific frequency or a specific voltage on a CDMA signal. is there. A digital data transmission / reception unit (51) is a block for controlling a protocol for transmitting / receiving digital data to / from a data communication unit of a computer, ISDN, or the like.
The A signal transmitting / receiving unit is a block that performs mutual modulation and demodulation of digital data and a CDMA signal, and superimposes the CDMA signal on a high frequency region. The standby control mechanism has a mechanism for detecting a signal of a specific frequency such as a dial tone superimposed on a low frequency region of the CDMA signal. When a signal having a predetermined strength or more is detected, the entire apparatus is switched from the standby state to the operation state. This is an operation for shifting. In addition, it has a function of superimposing a signal of a specific frequency on a low frequency region of a CDMA signal in order to shift another device to an operation state.

FIG. 6 shows a fourth embodiment of the present invention. A power supply control mechanism (6) that also supplies power to a computer or communication device that further supplies data to the embodiment of FIG.
The power control mechanism sends electricity to a computer or a communication device when the standby control mechanism shifts from the standby state to the operating state in synchronization with the standby control mechanism.

[0015]

As described above, when the present invention is used, multi-channel data communication can be performed using one existing two-wire stranded wire for telephone, which cannot be used for communication using an Ether network or TA used up to now. It is possible to connect and operate a conventional telephone at the same time, and turn on / off the power of a communication device and a computer at home from a remote place such as outside.
This has the advantage that the FF can be remotely controlled. For this reason, the devices in the home can usually be turned off and stand by, and the power consumption in the home can be reduced.

[Brief description of the drawings]

FIG. 1 is an example of conventional indoor communication using TA.

FIG. 2 is an example of conventional indoor communication using an Ether network.

FIG. 3 is an embodiment of the first and second aspects of the present invention.

FIG. 4 is an example of channel assignment in CDMA.

FIG. 5 is an embodiment according to the third aspect of the present invention.

FIG. 6 shows an embodiment according to the fourth aspect of the present invention.

[Explanation of symbols]

Reference Signs List 11 ISDN line 13 DSU 32 Indoor wiring composed of one two-wire stranded wire 34 CDMA communication device 36 General communication equipment or computer 51 Digital data transmission / reception unit 52 CDMA modulation / demodulation unit 53 that converts digital data and CDMA signals mutually 53 CDMA signal transmitting / receiving unit 54 standby control mechanism 55 mechanism for superimposing a signal of a specific frequency or a specific voltage on the CDMA signal 61 power supply control mechanism

Claims (4)

[Claims] 1. A method of performing digital communication with a server computer including indoor equipment and an external provider by using a general telephone line that is configured by a single two-wire twisted wire installed indoors, comprising: Digital service unit (DSU) and optical network unit (ON
U) A first CDMA communication device that modulates data of a digital / analog signal to the indoor side by the code division multi access (CDMA) method and passes the data through the indoor wiring, and second to second CDMA communication devices that exchange CDMA signals with the indoor wiring. N CDM
A CDMA communication device has a communication device A, and the second to N-th CDMA communication devices demodulate the received CDMA signal into a conventional digital signal by the CDMA communication device and supply the demodulated CDMA signal to each device such as a personal computer or a telephone. The digital signal output from each device such as a telephone is converted into the second to Nth CDMs.
A Output to indoor wiring by the communication device, and the first
To the N-th CDMA communication device to perform multi-channel indoor data communication,
The communication device is normally in a standby state, and the first CD
The MA communication device uses an external start signal or C
When a signal of a specific frequency or a specific voltage superimposed on the DMA signal is sensed, a transition is made from a standby state to an operation state, and
The N-th CDMA communication device has a function of detecting a signal of a specific frequency or a specific voltage superimposed on the CDMA signal of the indoor wiring and shifting from a standby state to an operation state. Has a function of superimposing a signal for shifting the CDMA device from the standby state to the operation state on a CDMA signal of the indoor wiring, and further has a function of the first CDMA communication device allocating a CDMA channel used by each CDMA communication device. An indoor wired communication method, comprising: 2. A method for performing digital communication with a server computer including indoor equipment and an external provider using a general telephone line that is configured by one existing two-wire stranded wire indoors, comprising: Digital service unit (DSU) and optical network unit (ON
U) A first CDMA communication apparatus for modulating data of a digital / analog signal to the indoor side by the code division multiple access (CDMA) method and passing the data through the indoor wiring, and second to second communication apparatuses for exchanging CDMA signals with the indoor wiring. N CDM
A CDMA communication device has a communication device A, and the second to N-th CDMA communication devices demodulate the received CDMA signal into a conventional digital signal by the CDMA communication device and supply the demodulated CDMA signal to each device such as a personal computer or a telephone. The digital signal output from each device such as a telephone is converted into the second to Nth CDMs.
A Output to indoor wiring by the communication device, and the first
To the N-th CDMA communication device to perform multi-channel indoor data communication,
The communication device is normally in a standby state, and the first CD
The MA communication device uses an external start signal or C
When a signal of a specific frequency or a specific voltage superimposed on the DMA signal is sensed, a transition is made from a standby state to an operation state, and
The N-th CDMA communication device has a function of detecting a signal of a specific frequency or a specific voltage superimposed on the CDMA signal of the indoor wiring and shifting from a standby state to an operation state. Has a function of superimposing a signal for shifting the CDMA device from the standby state to the operation state on the CDMA signal of the indoor wiring, further detects a channel used by the CDMA communication device in the indoor wiring, and detects a channel not used by the CDMA communication device. Indoor wired communication method, characterized by having a function of allocating a wireless communication. 3. A digital data transmitting / receiving unit for transmitting / receiving data to / from a DSU / ONU, a computer / communication device, etc., and a CD for converting digital data and CDMA signals between each other.
It has a CDMA signal transmission / reception unit that performs multi-channel communication with the MA modulation / demodulation unit and other CDMA communication devices using CDMA signals, detects a signal of a specific frequency or a specific voltage superimposed on the CDMA signal, and enters a standby state. An indoor wired communication device having a mechanism for shifting to an operation state and a mechanism for superimposing a signal of a specific frequency or a specific voltage on a CDMA signal. 4. A mechanism for sensing a signal of a specific frequency or a specific voltage superimposed on a CDMA signal and transitioning from a standby state to an operating state and for superposing a signal of a specific frequency or a specific voltage on a CDMA signal is provided in the CDMA communication apparatus. 4. The indoor wired communication device according to claim 3, further comprising a mechanism for supplying power to a computer or a communication device that supplies data when the CDMA communication device shifts from the standby state to the operation state.