JP2844550B2 - Off-talk communication device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention utilizes an idle time of a telephone network for connecting an exchange of a telephone office and a telephone at a user's home, and uses a center outside the office and a user's home. The present invention relates to an off-talk communication device for communicating with the device.

[Conventional technology]

Generally, a telephone communication system has a configuration in which an exchange of a central office is connected to a telephone at a user's home via a telephone network. When a telephone receiver is taken off-hook, a loop is formed between the exchange and the telephone network. The call is made by a signal formed and transmitted through this loop.

By the way, conventionally, there has been known an off-talk communication system for transmitting broadcast data such as music data to a user's house by one-way communication using the telephone network when the telephone network is idle. In this off-talk system, a center device for sending analog information such as voice and music is provided at a center installed outside the office, and the telephone network is selectively switched to an exchange or a center device by an in-station device provided at a telephone office. At the same time, a home device having a speaker was connected to the telephone network at the user's home, and when the receiver was off-hook, the internal device was switched to the exchange side to enable communication, and the receiver was placed. At the time of on-hook or the like, the in-station device is switched to the center device, and broadcast data sent from the center device is sent to each in-home device via the telephone network.

In this case, a plurality of center devices are actually connected to one in-station device, and the in-station device is turned on / off and the center device is selected (change of the channel of broadcast data) by remote control from each in-home device. be able to.

[Problems to be solved by the invention]

However, in the above-mentioned conventional off-talk communication system, since one-to-many one-way communication is performed from the center device to each home device, remote control such as turning on / off the intra-office device and selecting the center device can be performed from the home device at best. Therefore, information could not be sent from the center to a specific user's home as downlink data, or information could be sent from a specific user's home to the center as upstream data. Therefore, for example, (a) sending downlink data from the center to a specific user's home, and confirming on the center side with the uplink data whether or not the downlink data has correctly arrived at the user's home, (b) user It is impossible to receive music requests and instructions from homes as uplink data at the center, and (c) construct a protocol for error-free communication between the center and the user's home.

The present invention has been made in view of such a point, and a purpose thereof is to provide a communication window between broadcast data to be transmitted from the center device to the home device in the off-talk communication, and through this window. It is an object of the present invention to provide an off-talk communication device capable of realizing an expanded information transmission function between a center and a user's home by performing one-to-one two-way communication between the center and the user's home.

[Means for solving the problem]

In order to achieve the above object, in the present invention, in off-talk communication, one-to-one two-way communication is performed between a center and a user's house by packet communication.

Specifically, the solution taken by the present invention is that the telephone network exchange connects the telephone exchange at the telephone office and the telephone at the user's home.
It is assumed that an off-talk communication device is configured to transmit broadcast data from a center outside the station to a user's home via the telephone network. On the other hand, the center receives the output of the control device, which outputs the downlink data and the control signal, and the input of the uplink data, and receives the output of the control device based on the downlink data from the control device separately from the broadcast data. A first packet transmitter for creating a packet, receiving the output of the first packet transmitter and the broadcast data from the center equipment, and selectively outputting the packet or the broadcast data to the telephone network based on a control signal from the control device; A data switch and a first packet receiver which receives various signals from the telephone network, selects a packet addressed to the control device from the terminal device from the signals, extracts uplink data from the packet, and outputs the data to the control device And a first communication means controller for controlling the procedure of the transmitter by the first packet transmitter and the first packet receiver. A terminal device for outputting uplink data and inputting downlink data at a user's home; and a second packet receiving the output of the terminal device, creating a packet based on the uplink data from the terminal device, and outputting the packet to the telephone network. A transmitter and a second packet receiver that receives various signals from the telephone network, selects a packet addressed to the terminal device from the control device from the signals, extracts downlink data from the packet, and outputs the data to the terminal device. , A second packet transmitter, and a second communication procedure controller for controlling a procedure of transmission and reception by the second packet receiver.

[Action]

With the configuration described above, according to the present invention, broadcast data is transmitted from a center outside the office to the user's home via the telephone network during an idle time of the telephone network, such as when the receiver is put on-hook at the user's home. Can be

In this case, the downlink data from the control device is separately formed into a packet by the first packet transmitter, and the packet or the broadcast data is selected by the data switch, output to the telephone network, and sent to the user's home. Second at user's house
A packet addressed to the terminal device is selected from the signal of the telephone network by the packet receiver, and downlink data is extracted from the packet and output to the terminal device.

On the other hand, uplink data from the terminal device is formed into a packet by the second packet transmitter, output to the telephone network, and sent to the center. In the center, a packet addressed to the control device is selected from a signal of the telephone network by the first packet receiver, and uplink data is extracted from the packet and output to the control device.

During these, the first packet transmitter and the first packet receiver are controlled by the first communication procedure controller, and the second packet transmitter and the second packet receiver are controlled by the second communication procedure controller.

Since the above communication is one-to-one bidirectional communication, transmission of downlink data from the control device to a specific terminal device and transmission of uplink data from the specific terminal device to the control device are interferences between the terminal devices. For example, (a) sending downlink data of a specific terminal device from the control device, and confirming at the center with the uplink data whether or not the downlink data has correctly reached the terminal device, (b) terminal device The center receives a music request or command from the center as uplink data, and (c) constructs a protocol for performing error-free communication between the control device and the terminal device.

〔Example〕

 Hereinafter, embodiments will be described with reference to the drawings.

FIG. 1 shows an off-talk communication system provided with an off-talk communication device of an embodiment. In the figure, 20 is a telephone office,
Reference numeral 30 denotes a user's home, a telephone exchange 20 is provided at the telephone office 20, and a telephone 31 is provided at the user's home 30.
It is connected to a telephone 31 via a telephone network 40 composed of analog lines. Then, when the receiver of the telephone set 31 is picked up and goes off-hook, a loop is formed between the exchange 21 and the telephone network 40, and a call is made by a signal transmitted through this loop. Reference numeral 10 denotes a center installed outside the office. The center 10 is provided with first to third center devices 17, 17 ', 17 "for transmitting analog information such as voice and music.
Reference numeral 11 denotes a host computer as a control device, which outputs downstream data and control signals, and inputs upstream data. The telephone station 20 is provided with an intra-office device 22. The intra-office device 22 allows the telephone network 40 to be selectively switched and connected to the exchange 21 or the three center devices 17, 17 ', 17 ". Further, a terminal device 32 is provided in the user's home 30.
And a home device 38 having a speaker are connected to a telephone network 40 and provided. The terminal device 32 includes a MIDI sound source driven by MIDI data and an image device, and performs output of upstream data and input of downstream data.

In the basic configuration described above, when the receiver is off-hook, the intra-office device 22 is switched to the exchange side to enable communication. Analog information transmitted from any of the three center devices 17, 17 ', 17 "is transmitted to the home device 38 via the telephone network 40. That is, one-to-many communication is performed as in the conventional case. The on / off of the intra-office device 22 and the selection of the center device 17, 17 ', 17 "(change of channel) can be performed by remote control from the in-home device 38.

Next, the host computer 11 and the first center device 17
And the block configuration between the terminal device 32 and the home device 38 will be described. First, the following elements are incorporated in the center 10.

The first packet transmitter (12) has a function of receiving an output from the host computer 11 and creating a packet based on downlink data from the host computer 11. That is, the downlink data is divided and tailored into packets by adding flags, IDs, control information, and error control codes.

Data switch (13) Output (packet) of first packet transmitter 12 and first
It has a function of receiving broadcast data from the center device 17 and selectively outputting packets or broadcast data based on a control signal from the host computer 11. That is,
In order to open a communication window between broadcast data, broadcast data and communication data are switched. Reading of broadcast data is stopped during communication.

The first modem unit (14) has a function of receiving an output of the data switch 13, converting a packet or broadcast data into an analog signal, outputting the analog signal to the telephone network 40, and converting an analog signal from the telephone network 40 into a digital signal. Have. Perform full-duplex communication.

The packet receiver (15) has a function of receiving an output of the first modem unit 14, selecting a packet addressed to the control device from a digital signal, extracting uplink data from the packet, and outputting it to the host computer 11. The uplink data includes data to be communicated and control data related to control of a communication procedure.

The first communication procedure controller (16) has a function of controlling the first packet transmitter 12 and the first packet receiver 15 so that packet transmission and packet reception are performed according to a specific protocol. This element has different specifications depending on the protocol used. For example, if no error is found in the received packet, an acknowledgment packet is transmitted, and if there is an error, a negative acknowledgment packet is transmitted to request retransmission. In this way, control is performed so that data can be transmitted and received accurately using the transmission control packet.

The following elements are incorporated in the user's house 30.

The second packet transmitter (33) has a function of receiving an output of the terminal device 32 and creating a packet based on uplink data from the terminal device 32. That is, uplink data is divided, and a flag, an ID, control information, and an error control code are added before the packet.

A second modem section (34) receiving the output of the second packet transmitter 33, converting the packet into an analog signal, outputting the analog signal to the telephone network 40, and
It has the function of converting analog signals from 40 to digital signals. Perform full-duplex communication.

Broadcast data extractor (35) The broadcast data extractor (35) has a function of receiving the output of the second modem unit 34 and extracting broadcast data from a digital signal.

The second packet receiver (36) has a function of receiving an output of the second modem unit 34, selecting a packet addressed to a terminal device from a digital signal, extracting downlink data from the packet, and outputting the data to the terminal device 32. The downlink data includes data to be communicated and control data relating to control of a communication procedure.

Second communication procedure controller (37) The second communication procedure controller (37) has a function of controlling the second packet transmitter 33 and the second packet receiver 36 in correspondence with the first communication procedure controller 16.

Here, the downlink data sent from the host computer 11 to the terminal device 32 include music data (MIDI data) for karaoke and image data.

  Usage fee.

  List of song titles.

There is.

In addition, the following data is transmitted as uplink data from the terminal device 32 to the host computer 11.

Confirmation signal from terminal device 32. Host computer 11
This is a confirmation signal for confirming whether or not downlink data has correctly arrived from the server.

Request for music. This is a request signal for desired music data and image data.

ID signal from the terminal device 32. Check the terminal ID and confirm the center
It is intended to facilitate terminal management at 10.

Failure signal from terminal device 32. Terminal device 32 at center 10
This is to grasp the failure state of.

An operation signal from the terminal device 32. Terminal device 32 at center 10
This is to grasp the operation state of.

With the above configuration, the center 10 is connected via the telephone network 40 when the telephone network 40 is idle, such as when the receiver is on-hook.
Broadcast data is sent to the user's home 30. In that case, when switching to the first center device 17, the host computer
Bidirectional communication is performed between 11 and the terminal device 32. That is, the downlink data from the host computer 11 is formed into a packet by the first packet transmitter 12, and this packet or the broadcast data is selected by the data switch 13, converted into an analog signal by the first modem unit 14, and Output to the network 40. The analog signal is converted into a digital signal by the second modem unit 34 in the user's home 30, the broadcast data is extracted by the broadcast data extractor 35 and output to the home device 38, and the downstream data of the packet addressed to the terminal device is output. Are extracted by the second packet receiver 36 and output to the terminal device 32.

On the other hand, the uplink data from the terminal device 32 is formed into a packet by the second packet transmitter 33, and the packet is converted into an analog signal by the second modem unit 34 and output to the telephone network 40. The analog signal is converted into a digital signal by the first modem unit 14 in the center 10, and the upstream data of the packet addressed to the host computer is extracted by the first packet receiver 15 and output to the host computer 11.

Therefore, according to the above embodiment, since one-to-one bidirectional communication can be performed between the host computer 11 and the terminal device 32, transmission of downlink data from the host computer 11 to the specific terminal device 32, specific terminal device The transmission of uplink data from the terminal computer 32 to the host computer 11 can be performed without interference between the terminal devices. For example, (a) the downlink data is transmitted from the host computer 11 to a specific terminal device 32, and the downlink data is transmitted to the terminal device 32. (B) music request and command from the terminal device 32 as uplink data
10 and (c) constructing a protocol for performing error-free communication between the host computer 11 and the terminal device 32.

Further, since two-way communication is performed by packet communication, one channel can be simultaneously used for different purposes, and the terminal device 32 can be managed while music data service is continued.

Further, the data addressed to all the terminal devices can be transmitted at a time by using the broadcast property of the off-talk communication.

In the above embodiment, the music data is transmitted from the control device 11 to the terminal device 32 by MIDI data, but may be transmitted by the PCM method.

Although the broadcast data from the first center device is a digital signal, it may be an analog signal. In that case, a data switch is provided at the subsequent stage of the first modem, and the broadcast data is directly input to the data switch without passing through the first modem. The broadcast data extractor is directly connected to the telephone network without going through the second modem unit.

〔The invention's effect〕

As described above, according to the off-talk communication device of the present invention, one-to-one bidirectional communication can be performed between the control device and the terminal device, so that transmission and identification of downlink data from the control device to a specific terminal device can be performed. Transmission of uplink data from the terminal device to the control device can be performed without interference between the terminal devices. For example, (a) downlink data is transmitted from the control device to a specific terminal device, and this downlink data is accurately transmitted to the terminal device. Check at the center to confirm that the data has arrived,
(B) The center accepts music requests and commands from terminal devices as uplink data, and (c) constructs a protocol for error-free communication between the control device and the terminal devices. become.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an overall configuration of an embodiment. In the figure, 10 center, 11 host computer (control device), 12 first packet transmitter, 13 data switcher, 14 first modem unit, 15 first packet reception , 16 ... first communication procedure controller, 20 ... central office, 21 ...
... Exchange, 30 ... User's home, 31 ... Telephone, 32 ... Terminal device, 33 ... Second packet transmitter, 34 ... Second modem unit, 36 ... Second packet receiver, 37 ... Second communication procedure controller, 40... Telephone network.

Continuation of the front page (56) References JP-A-2-153665 (JP, A) JP-A-2-105767 (JP, A) JP-A-62-286095 (JP, A) JP-A-60-253082 (JP , A) JP-A-60-24591 (JP, A) JP-A-62-165460 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 11/00-11/10 H04H 1/00-1/14

Claims (1)

(57) [Claims] An off-talk communication in which broadcast data is sent from a center outside the office to a user's home via the telephone network during an idle time of a telephone network connecting a telephone exchange at a telephone office and a telephone at a user's home. In the device, the center has a control device that outputs downlink data and a control signal and an input of uplink data, and receives an output of the control device, and transmits a packet based on the downlink data from the control device separately from broadcast data. A first packet transmitter to be created; data switching for receiving an output of the first packet transmitter and broadcast data from a center device and selectively outputting packets or broadcast data to a telephone network based on a control signal from a control device; And various signals from the telephone network, select a packet from the terminal device addressed to the control device from these signals, extract the uplink data from this packet, and A first packet receiver for outputting to the traffic control device; and a first communication means controller for controlling a transmission / reception procedure by the first packet transmitter and the first packet receiver. And a second packet transmitter that receives the output of the terminal device, creates a packet based on the uplink data from the terminal device, and outputs the packet to the telephone network. A second packet receiver for receiving a signal, selecting a packet addressed to the terminal device from the control device from the signal, extracting downlink data from the packet, and outputting the data to the terminal device; a second packet transmitter and a second packet An off-talk communication device, comprising: a second communication procedure controller for controlling a transmission / reception procedure by a receiver.