JP3397128B2 - Data communication method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication method using a channel multiplexer for multiplexing a plurality of communication lines.

[0002]

2. Description of the Related Art Personal handy phone system (Pe
rsonal Handyphone System: P
With the spread of (HS), the chances of transmitting and receiving data using this PHS are increasing. For example, data may be data terminal equipment (Data Terminal Equipment).
ment: DTE) to adapter (Adapter: A
Handset (Personal Status) via DP
n: PS) and ISD using a base station and PHS network
Although it is transmitted to the communication partner of the N network, in order to complete the data transmission quickly, two slave units and a channel multiplexer are used, and the multiplexed communication may be performed to the ISDN network.

[0003]

In the above-mentioned conventional data communication system, when performing data communication, both the first communication call which is the first call and the second communication call which is the second call are originated by ADP. In the case of the device, the channel multiplexer is the non-initiating side of the second communication call, and this is determined by a timeout especially when the connection of the second communication call fails, so that the waiting time increases. In the case of a device that multiplexes between a slave unit and a base station, since two communication channels are connected between the slave unit and the base station for multiplexing, the existing slave unit and base station are used for multiplexing. There is a problem that it is not possible to perform communicative communication. Further, since the destination sub-address has a maximum of 20 digits, it is not possible to specify all the telephone number (10 digits) of the communication partner, the separator (1 digit), and the telephone number (10 digits or more) of the handset to be called back. For this reason, it is usually supported by using a subaddress.

Furthermore, if only the telephone number of the handset of the calling party of the first communication call is designated as the calling address of the calling back second communication call, when calling back to itself, the second communication call is called. The source address and destination address of will be the same. Further, if the telephone number of the channel multiplexer is designated as the calling address of the second communication call to be called back, it becomes impossible to distinguish when there is an incoming call from another communication partner via the channel multiplexer at the same time. There is.

The present invention has been made in view of the above points, and an object thereof is to improve the communication speed by calling back from the channel multiplexer and communicating using a plurality of communication lines. Data communication possible
To provide a method .

[0006]

Data communication method of the Summary of the Invention The present invention, the terminal side connects the adapter and the first handset and the second handset to the data terminal equipment, the communication network side is received in PHS network In a data communication method in a system including a channel multiplexer connected to a base station and a PHS network and a terminal adapter connecting the channel multiplexer to an ISDN network, the data terminal device is configured to transmit the data via the adapter. The control unit sends the telephone numbers of the second slave unit, the channel multiplexer and the communication partner to the first slave unit, and the first slave unit receiving the control command calls the telephone number. It is assigned to control information and is assigned to the channel multiplexer as a first
, The channel multiplexer detects the telephone number of the second slave unit from the call control information at the time of the incoming call and calls the second slave unit as a second communication call. Back, the second slave transmits an incoming call to the adapter, and the adapter establishes a communication protocol with the channel multiplexer using the communication lines of the first and second slaves. After the communication protocol is established, the channel multiplexer detects the telephone number of the first slave unit from the call control information and assigns it to the caller number. At the same time, the channel adapter uses a control command together with the telephone number of the communication partner to detect the terminal adapter. The terminal adapter which has received the call sends it to the communication partner as a third communication call, and after the call connection is completed, it is transmitted to the channel multiplexer, and the channel multiplexer receives this. To connect the communication line with the serial adapter with a communication partner.

[0007]

[0008]

[0009]

[0010]

Further, in the data communication method of the present invention, when the second communication call cannot be connected, it is judged that the first communication call and the third communication call are not multiplexed and the channel multiplexing is performed. performed in apparatus, the origination address of the second communication call, be specified by distinguishing the first handset and column deleted first handset
As a result, the call type of the second communication call is callback
Or whether to determine a separate incoming of the, by specifying to delete digits of the telephone number of the communication partner and telephone number of the second handset to call back to the subaddress, wear subarrays
The telephone number is designated within the maximum number of digits of the dress .

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 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, and the terminal side is connected to the DTE 10.
PSa12 and PSb13 are connected via DP11, and the communication network side connects the base station 14 accommodated in the PHS network 15 and the channel multiplexer 1 connected to the PHS network and the channel multiplexer 1 to the ISDN network 17. It is composed of 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 the communication partner. The ADP 11 interprets the control command input from the DTE 10 and exchanges call control information with the PSa 12 and PSb 13 and the channel multiplexer 1 to exchange the call control information.
And multiplex communication of the second communication call. PSa12 and PSb13 perform wireless communication with the base station 14.

[0014] The base station 14 provided in the communication network side PHS
It is housed in the network 15 and wirelessly communicates with PSa12 and PSb13. The channel multiplexer 1 receives a call from ADP 11 via PSa 12, calls back to ADP 11 via PSb 13, and at the same time sends a control command to TA 16 to send it to a communication partner. TA16 is a channel multiplexer 1
Control commands are exchanged between and to communicate with the communication partner.

Referring to FIG. 2, the channel multiplexer 1
It is of connected TA and the PHS communication network connected to an ISDN network
S interface transmitting / receiving unit 2 for transmitting / receiving call control information to / from the first and second handset units, and a first communication call terminating unit for terminating the protocol of the first communication call originally made. Serial communication is performed between the unit 3, the second communication call termination unit 4 that terminates the protocol of the second communication call for connecting to the terminal to be called back based on the information of the first communication call, and the TA. A serial interface unit 5 for performing the operation and a control unit 6 for controlling each of these units by a program stored in advance are provided.

The control unit 6 includes an S interface transmission / reception unit 2
A call back call control unit for terminating the first communication call to the first communication call terminating unit 3 and further terminating the second communication call to the second communication call terminating unit 4 based on the information received by 61, and a multiplexing control unit 62 that establishes the data links of these first and second communication calls and then connects the data links of these communication calls and the called party.

The operation will be described below with reference to FIGS. 1 and 3. First, an outline of the operation of the above-described data communication system will be described with reference to FIG. DTE10 is ADP11
The PSb 12, the channel multiplexer 1, and each telephone number of the communication partner are sent to PSa 12 via the control command. At this time, a normal telephone number or a special number is given as the telephone number of the channel multiplexer 1. The PSa 12 receiving this assigns the received telephone number to the call control information and makes a call to the channel multiplexer 1 as the first communication call, and the channel multiplexer 1 selects P from the call control information at the time of the incoming call.
The telephone number of Sb13 is detected and PSb13 is called back as a second communication call.

PSb 13 informs ADP 11 of the incoming call, and A
The DP 11 establishes a communication protocol with the channel multiplexer 1 using the communication lines PSa 12 and PSb 13, and the channel multiplexer 1 detects the telephone number of PSa 12 from the above call control information after the communication protocol is established. Then, it is assigned to the caller's 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. Receiving this, the TA 16 calls the communication partner as a third communication call and, after completion of the call connection, informs the channel multiplexer 1, and the channel multiplexer 1 receives this and communicates between the ADP 11 and the communication partner. Connect the line.

Next, details of the operation will be described with reference to FIG. When using two communication channels by callback, the DTE 10 designates the telephone number of the channel multiplexer 1, the telephone number of PSb 13, and the telephone number of the communication partner to the ADP 11, and the dial command (AT
D) is transmitted. Normally, when data communication is performed using a modem, AT commands are used, and most of the AT commands start with [AT] and are designated by the characters that follow. "D" of [ATD] represents a dial, and the telephone number of the other party is designated after "D". Upon receiving this dial command, the ADP 11 designates the telephone number of the channel multiplexer 1 as the destination address, the telephone number of PSb 13 and the separator and the telephone number of the communication partner as the destination subaddress, and further designates the caller number notification. Channel control serial signal
Send to. In the case of ISDN or PHS, it is possible to connect a plurality of terminals to one telephone number and specify a subaddress for identifying and receiving a call. When the other terminal is designated by the sub address, a separator is placed between the telephone number and the sub address to distinguish the telephone number and the sub address. The separator is usually "*", "#", "/", "\"
Etc. are used. Further, when a call is made from the ADP to the PS with a caller number, the control serial “off-hook” corresponding to the call is sent out, “calling address notification” which is the control serial designating the caller number.

At this time, the destination sub-address is ISDN or P.
Since the HS standard specifies a maximum of 20 digits, PSb
The first octet and third octet "0" of the telephone number 13 and the first octet "0" of the telephone number of the communication partner are deleted and designated. The normal telephone number system always starts with "0" to distinguish it from special numbers (110, etc.). Since the PS to call back and the called party are not special numbers, "0" can be added unconditionally in the channel multiplexer, so that the calling side can delete them.

For example, if the 10-digit telephone number of PSb13 is "0501234567", deleting the digit results in "51".
8 digits, such as "234567", and 1
If the 0-digit telephone number is "0398765432," deleting the digit results in 9 digits, such as "398765432."
The PSa 12 receives the control serial signal and sets the call setup (S
(ETUP: first communication call), its own telephone number is used as the calling address, and the telephone number of the channel multiplexer 1 is used as the called address.
A first communication call is issued to the channel multiplexer 1 by designating the telephone number of the PSb 13, the separator and the telephone number of the communication partner as the destination sub-address.

The channel multiplexer 1 receives the call setup from the PSa 12, connects the first communication call with the PSa 12, and sets PSa 12 and PSb 13 at the call origination address of the call setup (SETUP: second communication call). If the telephone number of PSa12 is 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 with the deleted digits is designated, and the first address is designated as the destination address. A second communication call is issued to PSb13 by designating the telephone number of PSb13 from the called subaddress of the communication call. At present, the telephone numbers of PSa12 and PSb13 are not the same, but in the future, for example, when a service that allows the same number only for incoming calls is provided, by deleting the digits, it is determined whether it is a callback incoming call or a separate incoming call. The ADP side can determine whether it is an incoming call.

On the other hand, the channel multiplexer 1 uses the TA 22
To the calling address from the calling address of the first communication call PS
The telephone number of a12 is designated, the telephone number of the communication partner is designated from the called subaddress of the first communication call as the called address, and the dial command ATxxx is transmitted. At this time PSa
PSb1 deleted by ADP11 except the calling address of the second communication call when the telephone numbers of 12 and PSb13 are the same
"0" of the 1st octet and 3rd octet of the telephone number of 3 and "0" of the 1st octet of the telephone number of the communication partner are added and designated. After the call connection with the channel multiplexer 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 synchronization processing of the first communication call with the channel multiplexer 1.

The PSb 13 receives the call setup from the channel multiplexer 1, connects the second communication call with the channel multiplexer 1, and notifies the ADP 11 to that effect through a control serial signal. The channel multiplexer 1 is PSb1
After the call connection with the ADP 11, the second communication call is synchronized with the ADP 11. In the channel multiplexer 1, D
If channel connection is not possible, "disconnect" from the network is received, or if connection is not possible after in-band negotiation after D channel connection, the negotiation result is received, or if connection is not possible due to deterioration of line condition after D channel connection, a timeout occurs. , It is determined that the second communication call cannot be connected. The TA 16 receives the dial command ATD, and the telephone number of the channel multiplexer 1 is set as the calling address of the call setting (SETUP: third communication call), and the telephone number of the communication partner is set as the destination address from the destination subaddress of the first communication call. Is designated to make a third communication call to the communication partner. After completing the call connection with the communication partner, the TA 16 establishes the data link of the third communication call, and after completion, responds to the channel multiplexer 1 (CON
N) is sent to notify.

After the completion of the data link establishment of the third communication call, the channel multiplexer 1 performs the data link establishment processing of the first communication call and the second communication call with the ADP 11, and after the completion of the first communication call and the second communication call. The data links of the second communication call and the third communication call are connected. The ADP 11 responds to the DTE 10 (CON) after the data link establishment of the first communication call and the second communication call is completed.
N) is sent to notify. Addressing at the time of connection described above is as shown in FIG.

Next, in the reverse case of the above-mentioned connection, that is, when the communication partner receives a call, the first communication call is received from the communication partner to the channel multiplexer 1, and the second communication call is received by the channel multiplexer 1. To PSa12 and the third communication call from the channel multiplexer 1 to PSb13, and the second communication call and the third communication call are connected at the same time. The addressing in this case is as shown in FIG. 4B, but the other operation details are the same as the above-mentioned operation,
The description is omitted. Note that, for example, if the 10-digit telephone number of PSb13 is "0501234567", deleting the digit will result in an 8-digit number such as "51234567".

[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 made when the channel multiplexer confirms the connection between the second communication call and the third communication call, the connection time can be shortened. When the second communication call cannot be connected, the first communication call and the third communication call are used for communication without multiplexing, but this determination is also made by the channel multiplexer, so that the connection time is shortened. be able to.

Further, since multiplexing is carried out between the adapter and the channel multiplexer, it is possible to carry out multiplexed communication using the existing base station and slave unit.

Further, by designating the origination 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 in case. Since the telephone number of the second child device to call back to the destination sub-address and the telephone number of the communication partner are designated by deleting the digits, the setting is easier than when the calling sub-address is used.

[Brief description of 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 multiplexer of the present invention.

FIG. 3 is a sequence chart for explaining an embodiment of a data communication method of the present invention.

FIG. 4A is a diagram showing address designation at the time of calling. (B) is a figure which shows address designation at the time of an incoming call.

[Explanation of symbols]

1-channel multiplexer 2 S interface transceiver 3 First communication call termination unit 4 Second communication call termination unit 5 Serial interface section 6 control unit 10 Data Terminal Equipment (DTE) 11 Adapter (ADP) 12 Handsets (PSa) 13 Handset (PSb) 14 base stations 15 PHS network 16 Terminal adapter (TA) 17 ISDN network 61 Callback Call Control Unit 62 multiplexing control unit

─────────────────────────────────────────────────── --- Continuation of the front page (56) References JP-A-9-135225 (JP, A) JP-A-6-188939 (JP, A) JP-A-4-310051 (JP, A) JP-A-9- 181832 (JP, A) JP 11-275654 (JP, A) JP 11-261717 (JP, A) JP 11-177482 (JP, A) JP 11-122321 (JP, A) JP-A-11-27740 (JP, A) JP-A-10-28086 (JP, A) JP-A-5-304498 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04M 11/00-11/10 H04L 29/08 H04Q 7/38

Claims (4)

(57) [Claims] 1. A terminal side connects an adapter, a first slave unit and a second slave unit to a data terminal device, and a communication network side multiplexes channels connected to a base station accommodated in a PHS network and a PHS network. In a data communication method in a system composed of a multiplexer and a terminal adapter for connecting the channel multiplexer to an ISDN network, the data terminal device is connected to the first slave unit via the adapter and to the second slave unit. Device, the channel multiplexer, and each telephone number of a communication partner are transmitted by a control command, and the first slave receiving the control command assigns the telephone number to the call control information and sends the number to the channel multiplexer. The call is made as a first communication call, and the channel multiplexer detects the telephone number of the second handset from the call control information at the time of the incoming call, and makes a second communication call to the second handset. Call back and before The second slave transmits an incoming call to the adapter, and the adapter establishes a communication protocol with the channel multiplexer using the communication lines of the first and second slaves, After establishing the communication protocol, the channel multiplexer detects the telephone number of the first slave unit from the call control information and assigns it to the caller number, and at the same time sends it to the terminal adapter with a control command together with the telephone number of the communication partner detected. The terminal adapter which received the call makes a third communication call to the communication partner and, after completion of the call connection, informs the channel multiplexer, and the channel multiplexer receives this and communicates with the adapter. A data communication method characterized by connecting a communication line with a partner. 2. When the second communication call cannot be connected, the channel multiplexer determines whether to perform communication between the first communication call and the third communication call without multiplexing. The data communication method according to claim 1 . 3. The origination address designation of the second communication call is made to the first address.
By distinguishing and designating the cordless handset and the first cordless handset, it is determined whether the call type in the second communication call is a call-back incoming call or a separate incoming call. The data communication method according to item 1 . 4. A second method for calling back to a destination subaddress.
By specifying the handset telephone number of the telephone number of the communication partner with digits deleted, the data communication method of claim 1, wherein the designating the telephone number in the maximum number of digits subaddress .