JPH11284762A - Channel multiplexer, data communication system and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the transmission rate by using plural channels through callback. SOLUTION: An S interface transmission/reception section 2 sends/receives information for call control to/from a terminal adaptor TA connecting with an ISDN or a PHS(personal handy phone system) communication network. A 1st communication call termination section 3 terminates a protocol of a 1st communication call sent at first. A 2nd communication call termination section 4 terminates a protocol of a 2nd communication call to connect with a terminal to be called back based on information of the 1st communication call. A serial interface section 5 makes serial communication with the TA. A control section 6 allows the 1st communication call terminal section 3 to terminate the 1st communication call and allows the 2nd communication call termination section 4 to terminate the 2nd communication call respectively based on the information received by the S interface transmission/reception section 2 for callback control, and sets up data link of the 1st and 2nd communication calls and then connects the data link between the communication calls and the called opposite party.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a channel multiplexing apparatus for multiplexing a plurality of communication lines, and a data communication system and method using the same.

[0002]

2. Description of the Related Art Personal handy phone systems (Pe)
rsonal HandyphoneSystem: P
With the spread of HS), opportunities for transmitting and receiving data using this PHS are increasing. For example, data is stored in a data terminal device (Data Terminal Equipment).
ment: DTE) to adapter (Adapter: A)
DP (Personal Status)
n: PS) using base station and PHS network
Although transmitted to the communication partner of the N network, multiplex communication may be performed on the ISDN network using two slave units and a channel multiplexer in order to complete data transmission quickly.

[0003]

In the conventional data communication system described above, when data communication is performed, both the first communication call in which the ADP is the first call and the second communication call in which the ADP is the second call are made. In the case of an apparatus that performs the second communication call, the channel multiplexing apparatus becomes the non-initiating side of the second communication call, and this is determined by timeout, especially when the connection of the second communication call fails, so that the waiting time increases. In the case of an apparatus that performs multiplexing between a slave unit and a base station, since two communication channels are connected between the slave unit and the base station to perform multiplexing, multiplexing is performed using an existing slave unit and base station. There is a problem that communication cannot be performed. Further, since the destination subaddress has a maximum of 20 digits, it is not possible to specify all of the telephone number (10 digits) of the communication partner, the separator (1 digit), and the telephone number (10 digits or more) of the slave unit to be called back. For this reason, a countermeasure is made by using a normal sub address.

Further, if only the telephone number of the handset on the calling side of the first communication call is specified in the calling address of the second communication call to be called back, the second communication call can be called back to itself. The destination address and destination address are the same. Further, if the telephone number of the channel multiplexing device is specified as the originating address of the second communication call to be called back, it is impossible to distinguish when another communication partner receives an incoming call via the channel multiplexing device at the same time. There is.

[0005] The present invention has been made in view of the above points, and an object of the present invention is to improve the communication speed by calling back from a channel multiplexing device and performing communication using a plurality of communication lines. It is an object of the present invention to provide a channel multiplexing device and a data communication system and method capable of doing so.

[0006]

According to the data communication system of the present invention, the terminal side allocates the call control information of the communication line to be called back to use a plurality of communication lines to the call control information of the communication line to which the terminal first connects. As a result, the channel multiplexing device on the communication network side calls back to the terminal side, and multiplexed communication is performed when the connection of the called back communication line is successful.

[0007] The channel multiplexing apparatus of the present invention comprises an ISDN
An S interface transmission / reception unit for transmitting / receiving information for call control to / from a terminal adapter or a PHS communication network connected to a network, and a first communication call termination for terminating a protocol of a first communication call originated first Serial communication between the terminal adapter, a second communication call termination unit for terminating a protocol of a second communication call for connecting to a terminal to be called back based on the information of the first communication call; A first communication call to the first communication call termination unit and a second communication call to the second communication call termination unit based on the information received by the S interface transmission / reception unit. A control unit for terminating and performing a callback control to establish a data link for the first and second communication calls and thereafter connecting the data link between the communication call and a called party. Equipped with a.

[0008] In the data communication system of the present invention, the terminal side connects an adapter, a first slave unit and a second slave unit to a data terminal device, and the communication network side includes a base station accommodated in a PHS network and a PH.
A data communication system comprising a channel multiplexing device connected to an S network and a terminal adapter connecting the channel multiplexing device to an ISDN network, wherein the channel multiplexing device is a terminal adapter or a terminal adapter connecting to an ISDN network. An S interface transmission / reception unit that transmits / receives information for call control to / from a PHS communication network, a first communication call termination unit that terminates a protocol of a first communication call that is initially transmitted, A second communication call terminating unit for terminating a protocol of a second communication call for connecting to a terminal to be called back based on information of the communication call; a serial interface unit for performing serial communication with the terminal adapter; A first communication call is terminated to the first communication call termination unit based on the information received by the S interface transmission / reception unit. To terminate the communication call to the second communication call termination for call-back control the first and second
After establishing the data link of the communication call, a channel multiplexing device including a control unit for connecting the communication call and the data link with the called party is used.

Further, in the data communication method of the present invention, the terminal side connects the adapter, the first slave unit and the second slave unit to the data terminal device, and the communication network side includes the base station accommodated in the PHS network. P
In a data communication method in a system including a channel multiplexing device connected to an HS network and a terminal adapter connecting the channel multiplexing device to an ISDN network, the data terminal device is connected to the first child through the adapter. The second slave unit, the channel multiplexing device, and the telephone number of the communication partner are transmitted to the unit by a control command, and the first slave unit receiving this transmits the telephone number to call control information. A call is made to the channel multiplexing device as a first communication call, and the channel multiplexing device detects the telephone number of the second handset from the call control information at the time of the incoming call, and sends the second handset to the second handset. Call back as a second communication call, the second handset communicates the incoming call to the adapter, and the adapter uses the communication lines of the first and second handset to provide the channel multiplexing equipment. Establishing a communication protocol with the,
After the communication protocol is established, the channel multiplexing device detects the telephone number of the first slave unit from the call control information, assigns the telephone number to the caller number, and simultaneously transmits the telephone number of the detected communication partner to the terminal adapter by a control command. And
The terminal adapter receiving the call initiates a third communication call to the communication partner, and after completion of the call connection, informs the channel multiplexing device. Connect the communication line with.

In a data communication method according to the present invention, a terminal connects an adapter, a first slave unit and a second slave unit to a data terminal device, and the communication network side includes a base station and a PHS network accommodated in a PHS network. In a data communication method in a system comprising a channel multiplexing device connected to a communication device and a terminal adapter connecting the channel multiplexing device to an ISDN network, when a call is received from a communication partner, a first communication call is transmitted from the communication partner. An incoming call to the channel multiplexing device, a second communication call from the channel multiplexing device to the first handset, and a third communication call from the channel multiplexing device to the second handset. And the connection of the second communication call and the third communication call is performed simultaneously.

Further, in the data communication method according to the present invention, when the second communication call cannot be connected, the channel multiplexing judgment is made to perform communication between the first communication call and the third communication call without multiplexing. The telephone address of the second slave unit that specifies the originating address of the second communication call by differentiating the first slave unit and the first slave unit whose digits have been deleted, and calls back to the destination sub-address. In this configuration, the number and the telephone number of the communication partner are specified by deleting digits.

[0012]

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1, a data communication system using a PHS network is illustrated.
The PSa 12 and the PSb 13 are connected via the DP 11, and the communication network side connects the base station 14 accommodated in the PHS network 15, the channel multiplexer 1 connected to the PHS network, and the channel multiplexer 1 to the ISDN network 17. And a terminal adapter (Terminal Adapter: TA) 16. The DTE 10 provided on the terminal side exchanges control commands with the ADP 11 to communicate with a communication partner. The ADP 11 interprets a control command input from the DTE 10 and exchanges call control information with the PSa 12 and PSb 13 and the channel multiplexing device 1 to perform first control.
And multiplex communication of the second communication call. The PSa 12 and the PSb 13 perform wireless communication with the base station 14.

A base station 14 provided on the communication network side is accommodated in a PHS network 15 and performs wireless communication with PSa12 and PSb13. The channel multiplexing device 1 converts the ADP 11 to the P
An incoming call is received via Sa12, a callback is made to ADP11 via PSb13, and at the same time, a control command is sent to TA16 and transmitted to a communication partner. The TA 16 exchanges control commands with the channel multiplexer 1 and communicates with the communication partner.

Referring to FIG. 2, channel multiplexing apparatus 1
Is an S interface transmission / reception unit 2 for transmitting / receiving information for call control to / from a TA or PHS communication network connected to an ISDN network, and a first terminal for terminating a protocol of a first communication call that has been initially transmitted. A communication call termination unit 3, a second communication call termination unit 4 for terminating a protocol of a second communication call for connecting to a terminal to be called back based on information of the first communication call, and TA A serial interface unit 5 for performing serial communication, and a control unit 6 for controlling these units by a program stored in advance are provided.

The control unit terminates the first communication call to the first communication call termination unit 3 based on the information received by the S interface transmission / reception unit 2, and further terminates the second communication call to the second communication call termination unit 4. A callback control unit 61 for terminating and controlling a callback, and a multiplexing control unit 62 for establishing a data link for the first and second communication calls and then connecting the data link between the communication call and a called party. And

The operation will be described below with reference to FIGS. First, an operation outline of the above-described data communication system will be described with reference to FIG. DTE10 is ADP11
The PSb 13, the channel multiplexing device 1, and each telephone number of the communication partner are transmitted to the PSa 12 via the control command via the control command. At this time, a normal telephone number or a special number is given as the telephone number of the channel multiplexing device 1. Upon receiving this, the PSa 12 allocates the received telephone number to the call control information and calls the channel multiplexing device 1 as a single communication call.
The telephone number of Sb13 is detected, and PSb13 is called back as a second communication call.

The PSb 13 informs the ADP 11 of the incoming call.
The DP 11 establishes a communication protocol with the channel multiplexing device 1 using the PSa 12 and PSb 13 communication lines. After the communication protocol is established, the channel multiplexing device 1 detects the telephone number of the PSa 12 from the above-described call control information. Then, it is assigned to the caller number and sent to the TA 16 by a control command together with the telephone number of the communication partner detected at the same time. Upon receipt of this, the TA 16 calls the communication partner as a third communication call, and after the call connection is completed, the call is transmitted to the channel multiplexer 1. The channel multiplexer 1 receives this and communicates with the ADP 11 and the communication partner. Connect the line.

Next, the operation will be described in detail with reference to FIG. When two communication channels are used by the callback, the DTE 10 specifies the telephone number of the channel multiplexing device 1, the telephone number of the PSb 13, and the telephone number of the communication partner to the ADP 11, and issues a dial command (AT
D). Normally, when performing data communication using a modem, an AT command is used. In this AT command, most commands start with [AT], and the command is specified by a character following the AT. “A” in [ATD] indicates a dial, and specifies the other party's telephone number after “D”. The ADP 11 receives this dial command, specifies the telephone number of the channel multiplexing device 1 as the destination address, specifies the telephone number and separator of the PSb 13 as the destination sub-address, and specifies the telephone number of the communication partner, and further specifies the caller ID notification. The channel control serial signal is
Is sent to In the case of ISDN or PHS, a plurality of terminals can be connected to one telephone number, and a sub-address can be designated for identification and reception. When specifying the destination terminal by the subaddress, a telephone number and a subaddress are distinguished by placing a separator between the telephone number and the subaddress. Separators are usually “*”, “#”, “/”, “￥”
Are used. In addition, when a call is transmitted from the ADP to the PS with a caller number, a "calling address notification" which is a control serial for designating the caller number is transmitted prior to the control serial "off hook" corresponding to the call.

At this time, the destination subaddress is ISDN or P
Since the HS standard specifies a maximum of 20 digits, PSb
The first octet and third octet “0” of the 13th telephone number and the first octet “0” of the communication partner's telephone number are deleted and designated. The normal telephone numbering system always starts with "0" to distinguish it from a special number (such as 110). Since the PS to be called back and the called party are not special numbers, "0" can be unconditionally added by the channel multiplexing device, and can be deleted on the calling side.

For example, if the 10-digit telephone number of PSb13 is “050123456”, deleting the digit results in “51”.
234567 "and 8 digits, and 1
If the 0-digit telephone number is “0398765432”, removing the digits will result in 9 digits, such as “398765432”.
The PSa 12 receives the control serial signal and sets up the call (S
(ETUP: first communication call), its own telephone number as the originating address, the telephone number of the channel multiplexer 1 as the destination address,
A first communication call is issued to the channel multiplexing apparatus 1 by designating the telephone number of the PSb 13, the separator, and the telephone number of the communication partner in the destination sub-address.

The channel multiplexing apparatus 1 receives the call setting from the PSa 12, connects the first communication call with the PSa 12, and sets the PSa 12 and the PSb 13 in the calling address of the call setting (SETUP: second communication call). If the telephone numbers of PSa12 are different, the telephone number of PSa12 is designated from the calling address of the first communication call. If the telephone numbers of PSa12 and PSb13 are the same, the telephone number of PSa12 whose digits have been deleted is designated, and the destination address is the first. The telephone number of PSb13 is designated from the destination subaddress of the communication call, and a second communication call is issued to PSb13. At present, the telephone numbers of PSa12 and PSb13 are not the same, but in the future, if a service that allows the same number to be limited to incoming calls is provided in the future, the digits are deleted to determine whether the incoming call is a callback or not. The ADP can determine whether the call has arrived.

On the other hand, the channel multiplexing device 1
To the calling address from the calling address of the first communication call to PS
The telephone number of a12 is designated, the telephone number of the communication partner is designated from the destination subaddress of the first communication call as the destination address, and the dial command ATxxxx is transmitted. At this time, PSa
PSb1 deleted by ADP11 except for the calling address of the second communication call when the telephone numbers of PSb12 and PSb13 are the same.
"0" in the first and third octets of the telephone number 3 and "0" in the first octet of the telephone number of the communication partner are specified. After the call connection with the channel multiplexing device 1 is completed, the PSa 12 notifies the ADP 11 to that effect by a control serial signal. The ADP 11 receives the control serial signal and performs a synchronization process of the first communication call with the channel multiplexing device 1.

The PSb 13 receives the call setting from the channel multiplexing device 1, connects a second communication call with the channel multiplexing device 1, and notifies the ADP 11 to that effect by a control serial signal. The channel multiplexing device 1 uses PSb1
After the completion of the call connection with the ADP 11, the second communication call is synchronized with the ADP 11. In the channel multiplexing apparatus 1, D
If the channel cannot be connected, reception of “disconnection” from the network or the connection cannot be established by in-band negotiation after the connection of the D channel. , It is determined that the second communication call cannot be connected. The TA 16 receives the dial command ATD, sets the calling address of the call setup (SETUP: third communication call) to the telephone number of the channel multiplexing apparatus 1, and sets the destination address to the destination telephone number from the destination subaddress of the first communication call. Is designated and a third communication call is made to the communication partner. After the call connection with the communication partner is completed, the TA 16 establishes the data link of the third communication call, and after completion, responds to the channel multiplexer 1 (CON).
N) for notification.

After completing the data link establishment of the third communication call, the channel multiplexing apparatus 1 performs data link establishment processing of the first communication call and the second communication call with the ADP 11, and after the completion, the first communication call and the The data link of the second communication call is connected to the data link of the third communication call. The ADP 11 responds to the DTE 10 after completing the data link establishment of the first communication call and the second communication call (CON
N) for notification. The address specification at the time of the connection described above is as shown in FIG.

Next, in the case opposite to the above connection, that is, when a call is received from a communication partner, a first communication call is received from the communication partner to the channel multiplexer 1, and a second communication call is received from the channel multiplexer 1. This can be realized by making an incoming call to the PSa 12 and a third communication call from the channel multiplexing device 1 to the PSb 13 and simultaneously connecting the second communication call and the third communication call. The address designation in this case is as shown in FIG. 4B, but the other operation details are the same as those described above.
Description is omitted. For example, if the 10-digit telephone number of PSb13 is "0501234567", if the digits are deleted, the number becomes 8 digits such as "512234567".

[0027]

As described above, according to the present invention, in the first communication call and the second communication call to be multiplexed, the second communication call is called back by the channel multiplexer.
The call connection of the second communication call and the third communication call can be performed simultaneously.
Since the end-to-end connection can be performed when the channel multiplexing device confirms the connection between the second communication call and the third communication call, the connection time can be reduced. If the second communication call cannot be connected, communication is performed by the first communication call and the third communication call without multiplexing, and this determination is also made by the channel multiplexing device, thereby shortening the connection time. be able to.

Further, since the multiplexing is performed between the adapter and the channel multiplexing device, it is possible to perform the multiplexing communication using the existing base station and the slave unit.

Further, by designating the originating address of the second communication call by distinguishing between the first slave unit and the first slave unit whose digits have been deleted, communication is performed by one first slave unit. It is also possible to handle cases. Since the telephone number of the second slave unit that calls back to the destination sub-address and the telephone number of the communication partner are specified by deleting digits, the setting is easier than when using the calling sub-address.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a data communication system of the present invention.

FIG. 2 is a block diagram showing an embodiment of a channel multiplexing device of the present invention.

FIG. 3 is a sequence chart illustrating an embodiment of a data communication method according to the present invention.

FIG. 4A is a diagram showing address designation at the time of calling. FIG. 6B is a diagram showing address designation at the time of incoming call.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Channel multiplexer 2 S interface transmission / reception part 3 1st communication call termination part 4 2nd communication call termination part 5 serial interface part 6 control part 10 data terminal equipment (DTE) 11 adapter (ADP) 12 slave unit (PSa) 13 Handset (PSb) 14 Base station 15 PHS network 16 Terminal adapter (TA) 17 ISDN network 61 Callback call control unit 62 Multiplex control unit

Claims (8)

[Claims] An apparatus according to claim 1, wherein the terminal side assigns the call control information of the communication line to be called back to use a plurality of communication lines to the call control information of the communication line to which the terminal side first connects, so that the terminal from the channel multiplexer on the communication network side A data communication system that calls back to a communication side and performs multiplexed communication when connection of the communication line that has called back is successful. 2. An S interface transmission / reception unit for transmitting / receiving information for call control to / from a terminal adapter or a PHS communication network connected to an ISDN network, and terminating a protocol of a first communication call originated first. A first communication call terminating unit that terminates a protocol of a second communication call for connecting to a terminal to be called back based on the information of the first communication call; and the terminal adapter. A first communication call to the first communication call termination unit based on information received by the S interface transmission / reception unit, and a second communication call to the second communication call. (2) Terminating the communication call terminator, performing callback control and establishing a data link for the first and second communication calls, and then recalling data between the communication call and the called party. A channel multiplexing device comprising: a control unit for connecting a link. 3. The terminal side connects the adapter, the first handset and the second handset to the data terminal device, and the communication network side is a base station accommodated in the PHS network and channel multiplexing connected to the PHS network. A data communication system comprising a multiplexing device and a terminal adapter for connecting the channel multiplexing device to an ISDN network, wherein the channel multiplexing device uses the channel multiplexing device according to claim 2. Data communication system. 4. The terminal side connects the adapter, the first handset and the second handset to the data terminal device, and the communication network side is a base station accommodated in the PHS network and channel multiplexing connected to the PHS network. And a terminal adapter for connecting the channel multiplexing device to the ISDN network in a system, the data terminal device being connected to the first child device via the adapter and to the second child device. The first slave unit, which receives the telephone numbers of the communication device and the communication device with the communication device, transmits the telephone number to the call control information, and the first slave device receives the control information and transmits the telephone number to the channel multiplexer device. The channel multiplexing device detects the telephone number of the second handset from the call control information at the time of the incoming call, and makes a call to the second handset as a second communication call. Call back and before The second handset communicates an incoming call to the adapter, the adapter establishing a communication protocol with the channel multiplexer using the communication lines of the first and second handset, After establishing the communication protocol, the channel multiplexing device detects the telephone number of the first slave unit from the call control information and assigns it to the caller number, and simultaneously sends the detected telephone number of the communication partner together with the detected telephone number to the terminal adapter by a control command. Receiving the call, the terminal adapter calls the other party as a third communication call, and after completion of the call connection, informs the channel multiplexing device, and the channel multiplexing device receives the call and communicates with the adapter. A data communication method comprising connecting a communication line with a partner. 5. The terminal side connects the adapter, the first handset and the second handset to the data terminal device, and the communication network side is a base station accommodated in the PHS network and channel multiplexing connected to the PHS network. In a data communication method in a system comprising a multiplexing device and a terminal adapter for connecting the channel multiplexing device to an ISDN network, when a call is received from a communication partner, a first communication call is transmitted from the communication partner to the channel multiplexing device. An incoming call, a second communication call from the channel multiplexing device to the first handset, a third communication call from the channel multiplexing device to the second handset, A data communication method, wherein the connection of the first communication call and the connection of the third communication call are simultaneously performed. 6. The channel multiplexer according to claim 1, wherein when the second communication call cannot be connected, the channel multiplexing device determines whether to perform communication between the first communication call and the third communication call without multiplexing. The data communication method according to claim 4 or 5, wherein 7. The method according to claim 1, further comprising:
6. The data communication method according to claim 4, wherein the second slave unit and the first slave unit whose digits are deleted are specified separately. 8. A second call back to a destination subaddress.
6. The data communication method according to claim 4, wherein digits of the telephone number of the slave unit and the telephone number of the communication partner are deleted.