JP3501835B2 - Communication node - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a communication node of a communication system. In particular, a PB (push button) signal depressed at the terminal is sent to the communication node via a control line by a control signal, and a PB sound signal is generated according to the control signal, and the communication line connected to the communication partner is generated. And a PB sound generation device of a communication node that sends out the PB sound to the communication node. 2. Description of the Related Art FIG. 8 is a block diagram of a conventional communication node, and shows a communication node of a radio system. FIG. 9 is a diagram showing a PB sound generation sequence of a conventional communication node. Conventionally, in the case of a wireless communication system, an apparatus having a configuration as shown in FIG. 8 has been used as a device for generating a PB sound from a PB number transmitted by a control signal via a wireless control line in a wireless communication system. I was In FIG. 8, 1
Is a wireless terminal, 3 is a wireless base station that performs wireless communication with the wireless terminal 1, 2b is a wireless communication line that transmits and receives communication information between the wireless terminal 1 and the wireless base station 3, and 2d is a wireless terminal that communicates with the wireless terminal 1. A radio control line for transmitting and receiving control signals to and from the station 3;
Is a communication node that performs connection control (hereinafter, referred to as an exchange node), 4b is a wired communication line for transmitting and receiving communication information between the wireless base station 3 and the exchange node 5, and 4d is a wireless base station 3
A wired control line for transmitting and receiving control signals between the wireless terminal 1 and the switching node 5; a switch 6 for switching a route to transmit a PB sound to a communication partner of the wireless terminal 1;
The B sound generation units and 13 are control units that control the queued PB sound generation unit 14 and the switch 6 according to a control signal from the wireless terminal 1. Here, the queued PB sound generator 14 includes a queue 17 for accumulating a PB control signal from the wireless terminal 1,
PB sound source 16 that generates a PB sound according to a PB control signal
And a selector 15 for switching between voice (call path) and PB sound (PB sound source path). [0005] In FIG. 8 and FIG. 9, when PB “#” is pressed by the wireless terminal 1 in the state 1, the wireless terminal 1 transmits FACILITY (FAC, “#”) as a PB control signal.
When the control unit 13 of the switching node 5 receives the PB control signal, the control unit 13 captures the queued PB sound generation unit 14 and registers the PB control signal FACILITY (FAC, "#") in the queue 17 as a queue. . Continuously, PB on wireless terminal 1
When “9” is pressed, FACILITY (FAC, “9”) is transmitted from the wireless terminal 1 as a PB control signal, and when the control unit 13 receives the PB control signal, the control unit 13 transmits the PB control signal FACILITY Queue 1 with (FAC, "9") as the queue
7 (state 2). The PB sound generator 14 with cue periodically reads the state of the cue 17 and takes out a PB control signal (cue) registered on a first-come, first-served basis and retrieves a PB sound (“#” in this case) according to the PB information. ) Is generated in the PB sound source 16 for a specified time, and in synchronization with this, the selector 15 is connected to the PB sound source 16 to transmit a PB signal to the communication partner. Further, the cue-added PB sound generator 14 periodically reads the state of the cue 17, takes out the registered cue, and outputs a PB sound (in this case, “9”) according to the PB information to the PB sound source 16. A specified time is generated, and in synchronization with this, the selector 15 is connected to the PB sound source 16 to transmit a PB sound signal to the other party (state 3). When the queued PB sound generating unit 14 periodically reads the state of the queue 17 and finds that there is no registered queue for a certain period of time or more, the control unit 13 is informed that "no PB control signal". Notify that Control unit 1
3 receives the notification of "no PB control signal", instructs the switch 6 to disconnect the connection with the cueing PB sound generation unit 14, and simultaneously releases the cueing PB sound generation unit 14 (state 4 = State 1). [0009] However, in such a conventional communication node, once the queued PB sound generation unit is once captured, it remains occupied by one wireless terminal for a certain period of time. One queued PB sound generation unit cannot be shared by a plurality of users at the same time, and not only a huge number of queued PB generation units are required according to the traffic demand,
Also, there is a problem that the traffic prediction is difficult. That is, since the cue-added PB sound generation section includes not only a simple memory circuit but also a circuit for physically generating a PB sound signal, an electronic circuit including a large number of transistors and power for driving the electronic circuit are required. It is necessary, and providing a large number of these circuits increases the scale of the device and becomes extremely expensive. The present invention solves the above problems,
One PB sound generation device can provide PB to multiple users in common.
It is an object of the present invention to provide a communication node capable of transmitting a sound signal. An object of the present invention is to reduce the size of the device, reduce the power consumption of the device, and reduce the cost of the device. An object of the present invention is to provide a simple control method for relaying a PB signal to an outgoing line by a switch for switching connection. According to the present invention, there is provided a switch for accommodating a plurality of incoming communication lines and a plurality of outgoing communication lines, and for performing switching connection between the incoming communication line and the outgoing communication line. (6), and a control unit (8) for the switch. The control unit (8) controls the switch (6) based on the connection control information arriving on the control line, and controls the output line. In a communication node including control means for transmitting information necessary for connection control as a PB sound signal, a PB sound generation circuit (7) for simultaneously and continuously generating all PB sounds is provided. The output of the sound generation circuit (7) is fixedly connected to the input side of the switch, and the control means sequentially selects the output of the PB sound generation circuit (7) at the timing of the PB sound relay, and selects the output side. Switch to connect to the line. It is characterized by including means for controlling the switch (6). Further, according to the present invention, the control section (8) analyzes PB sound generation control means (9, 10) for analyzing information to be transmitted to the outgoing line from connection control information arriving on a control line.
Buffer means (12) for storing the connection control information analyzed by the control of the PB sound generation control means (9, 10) in the order of arrival, and the switch (6) referring to the contents of the buffer means (12). It is preferable to have a switch control means (11) for performing the control of (1). Further, the PB sound generation control means (9, 1
0) is a call path management table indicating an input / output time slot number of the switch (6) and a telephone number started to be managed at the time of starting a call of the wireless terminal (1), and a PB sound source of the switch (6). The buffer means (12) includes a PB sound source path management table indicating the entry time slot number of the path and a PB registration flag management table indicating whether a PB sound generation request has been made. PB sound generation control signal storage indicating the cue index, the number of digits of the PB signal requested to be generated, the PB signal requested to be generated, the input / output time slot number of the speech path of the switch, and the input time slot number of the sound source path of the PB sound. Can include a table. Another aspect of the present invention is a PB sound signal relay control method for an exchange. That is, all PB sounds are given simultaneously and continuously to a plurality of input terminals of the exchange switch (6) of the communication line, and the switch is connected to the communication partner at a timing corresponding to the PB signal to be relayed. By sequentially connecting to the outgoing line, the PB sound signal can be relayed. The PB sound generating circuit (7) of the present invention may be provided with one (or a small number) of switches in principle. The PB sound generation circuit (7) according to the present invention has 0-9, *,
{Circle around (4)} Further, in the case of the hexadecimal system, all the PB signals corresponding to A to D are continuously and simultaneously generated. The output of this PB sound generation circuit is fixedly connected to the input terminal of the switch, and the switch sequentially selects this input terminal in accordance with the timing of relaying the PB sound signal, so that the corresponding output line is connected. A PB sound signal can be transmitted. With this configuration, it is not necessary to connect a large number of PB sound generators having a large hardware scale according to the traffic. Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a communication node according to an embodiment of the present invention. In FIG. 1, a communication node includes a wired communication line 4b and a plurality of output lines as a plurality of incoming communication lines connected to a wireless base station 3 connected to a wireless terminal 1 via a wireless communication line 2b and a wireless control line 2d. A switch 6 for accommodating the side communication line and performing an exchange connection between the wired communication line 4b and the outgoing communication line; and a control unit 8 of the switch 6. The control unit 8 controls the connection of the switch 6. The means 11 and the control of the switch 6 are executed based on the PB sound generation request control signal as connection control information arriving via the wired control line 4d from the wireless base station 3 as a control line and transmitted to the communication partner of the outgoing line. Control means for transmitting information to be transmitted as a PB sound signal. The feature of the present invention is that PB
A PB sound generating circuit 7 for simultaneously and continuously generating all of the sounds is provided. An output of the PB sound generating circuit 7 is fixedly connected to an input side of the switch 6. It is characterized by including means for controlling the switch 6 so that the output is sequentially selected at the timing of PB sound relay and connected to the outgoing line. The PB sound generation circuit 7 generates PB sounds corresponding to the dial “0” to the dial “9”, the dial “*” and the dial “#” in parallel and continuously. The control unit 8 includes a PB sound generation control unit 9 as a PB sound generation control unit for analyzing information to be transmitted to the outgoing line from a PB sound generation request control signal arriving on the wired control line 4d. It includes a path management means 10 and a buffer means 12 for storing PB sound generation control information in the order of arrival as connection control information analyzed under the control of the PB sound generation control means 9. Perform control. The operation of the communication node having such a configuration will be described. FIG. 2 is a diagram showing a PB sound generation control sequence of the communication node according to the present invention. FIG. 3 is a diagram showing an outline of an operation of generating a PB sound by the communication node according to the present invention. FIG. 4 is a diagram showing the contents of the PB registration flag management table of the PB sound generation control means of the communication node of the present invention. FIG. 5 is a diagram showing the contents of the PB sound generation control information accumulation table of the buffer means of the communication node of the present invention. FIG. 6 is a communication path management table and PB of the communication path management means of the communication node according to the present invention.
FIG. 4 is a diagram showing the contents of a sound source path management table. FIG. 7 is a detailed diagram showing the contents of the PB sound generation control information accumulation table of the buffer means of the communication node of the present invention. In FIG. 1, in the case of a high-efficiency speech coded speech signal such as radio speech coding as in the present radio communication system, an encoding design suitable for speech transmission is made, and in the radio communication line 2b. Since non-voice such as PB sound causes coding distortion, it is converted into information indicating a PB signal, transmitted as a radio control signal through the radio control line 2d, and transmitted through the wire communication line 4b via the radio base station 3. There is a need to. In the present wireless communication system, the control unit 8 controls the switch 6 based on a control signal including information indicating the number of the PB pressed by the wireless terminal and a PB sound generation request,
A path connected to a required PB sound source is selected from a PB sound pattern generated by the PB sound generation circuit 7, and the PB sound is transmitted to the communication partner of the wireless terminal 1. In FIGS. 2 and 3, it is assumed that the control signal for the PB sound generation request uses a facility message (FACILITY) and facility information (FAC) in the ISDN user network interface. , 8, 7, 6, and # "will be described. The wireless terminal 1 transmits FACILITY (FAC, "9, 8, 7, 6, #") to the wireless control line 2d as a PB sound generation request control signal. When the switching node 5 receives the PB sound generation request control signal from the wireless base station 3 via the wired control line 4d, the PB sound generation control means 9 analyzes the PB sound generation request control signal and switches the wireless terminal 1 Recognized numbers CRi and PB
Recognize the numbers "9, 8, 7, 6, #, 5 digits"
The call path management table in the communication path management means 10 shown in FIG. 6A is indexed by i, and the time slot number of the switch 6 (input side number = αi, output side number = βj) and the call of the wireless terminal 1 The telephone number DNi of the wireless terminal 1 that has been managed at the start is extracted (FIG. 6, 10-CRi) (S
1). Whether a request to generate a PB sound is made (ON) as shown in FIG.
It has a PB registration flag management table that manages whether it has not been performed (OFF), and indexes the PB registration flag management table to determine the registration status of the input side time slot number αi of the switch 6 extracted in sequence S1. (S
2). When the PB registration flag is OFF (FIG. 4, 9-α
In i), the PB registration flag is set ON (S4), and the telephone number DNi of the wireless terminal 1 is set in the PB registration flag management table (FIG. 4, 9-αi ′) (S3). Also, PB
If the registration flag is ON, it is determined whether the requesting telephone number DNi is equal to the already registered telephone number (S1).
5) If they are equal, the flow branches to sequence S6; if they are not equal, the flow branches to illegal processing (S16). In order to determine the registration location of the PB sound generation request control signal, the queue registration index shown in FIG. 5 is captured from the PB sound generation control information storage table in the buffer means 12 (S6). When the queue registration index is captured, the buffer unit 12 updates the queue registration index. Then, in the PB sound generation control information storage table (12- in FIG. 5) indicated by the index, the transmission digit number “5 digits” obtained in sequence S1, the generation request PB signal “9, 8, 7, 6, #”, Call path information (αi⇔β
j) is registered (S7). Next, the first digit is set (N = 1) in order to determine the PB sound source path of each generation request PB signal (S = 1).
8). Then, the first digit “9” is extracted from the generation request PB signal (S9), and FIG.
The PB sound source path management table shown in FIG.
0), the input time slot number (αp9 = PB sound source path) of the switch 6 corresponding to the PB sound source type “9” is obtained (S11) and stored in the index of the PB sound generation control information accumulation table (S12). Similarly, in order to obtain a PB sound source path for the second to fifth digits of the generation request PB signal, it is determined whether or not five processes have been completed up to the fifth digit (S14). When N <5, the value of N is updated (N = N + 1) (S13), and the sequence S9 to the sequence S14 are repeatedly executed, and the PB sound source paths (αp8, αp7, αp6, αp) of the remaining generation request PB signals are repeated.
p #) is stored in the index of the PB sound generation control information accumulation table (FIG. 5, 12- ') (S12), and N ≧ 5 is determined in sequence S14, and the registration process is completed. FIG. 7A shows the contents of the PB sound generation control information storage table of the buffer means, and FIG. 7B shows the status of queue registration in the PB sound generation control information storage table.
The switch control means 11 switches the switch 6 at regular intervals based on the communication path information registered in the buffer means 12.
And alternately control connection between the PB sound source path and the communication path. With this control, when the switch 6 connects the PB sound source path, the PB sound is transmitted from the PB sound generation circuit 7 to the communication partner. As described above, the present embodiment employs a wireless system, but the effects of the present invention are the same even in a wired system. Although the example in which the PB sound generation means is provided in the switching node has been described, the effect of the present invention is the same even when the PB sound generation means is provided in a wireless base station or another communication node. As described above, the present invention has the following excellent effects. By disposing various PB sound patterns generated by one PB sound generation circuit 7 before the switch 6 and fixedly connecting to the switch 6, a plurality of users can share a single PB sound generation circuit, In addition, since it becomes irrelevant to the traffic demand of the user making the PB sound generation request, the facility design becomes easy. From such effects, it is possible to reduce equipment cost, reduce the size of the device, and reduce power consumption. The control unit can be realized by software, and there is no need to consider equipment space. Since the buffer means has a means for storing information extracted from the PB sound generation request control signal transmitted from the wireless terminal, the wireless terminal continuously transmits the PB sound without waiting for the PB sound transmission completion signal from the switching node. A sound generation request control signal can be transmitted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of a communication node according to an embodiment of the present invention. FIG. 2 is a diagram showing a PB sound generation control sequence of the communication node according to the present invention. FIG. 3 is a diagram showing an outline of an operation of generating a PB sound by a communication node according to the present invention. FIG. 4 shows P of the PB sound generation control means of the communication node of the present invention.
The figure which shows the content of the B registration flag management table. FIG. 5 is a diagram showing the contents of a PB sound generation control signal accumulation table of the buffer means of the communication node of the present invention. FIG. 6 is a diagram showing contents of a communication path management table and a PB sound source path management table of a communication path management unit of the communication node of the present invention. FIG. 7 is a detailed view of a PB sound generation control signal accumulation table of the buffer means of the communication node of the present invention. FIG. 8 is a block diagram of a conventional communication node. FIG. 9 is a diagram showing a PB sound generation sequence of a communication node in a conventional example. [Description of Signs] 1 wireless terminal 2b wireless communication line 2d wireless control line 3 wireless base station 4b wired communication line 4d wired control line 5 switching node 6 switch 7 PB sound generation circuits 8, 13 control unit 9 PB sound generation control means 9 -State before registration of information in αi PB registration flag management table 9-State after registration of information in αi'PB registration flag management table 10 Communication path management means 10-CRi Communication path management information between wireless terminal and communication partner 11 Switch control Means 12 Buffering Means 12-State before registration of PB sound generation information storage table 12-'State after registration of PB sound generation information storage table 14 PB sound generation unit with queue 15 Selector 16 PB sound source 17 Queue Q-1P First sound source path information Q-1S of queue index First call path information Q-2P of queue index Queue index Second sound source path information Q-2S second call path information of queue index Q-4P fourth sound source path information of queue index Q-4S fourth call path information of queue index Q-5P fifth sound source path of queue index Information Q-5S Fifth call path information of queue index

Continuation of front page (72) Inventor Toshio Ishizaka 1-6-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-4-165890 (JP, A) JP-A-5-68270 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) H04Q 1/30-1/50

Claims (1)

(1) A switch (6) for accommodating a plurality of incoming communication lines and a plurality of outgoing communication lines, and performing an exchange connection between the incoming communication line and the outgoing communication line. ) And a control unit (8) for the switch. The control unit (8) executes the control of the switch (6) based on the connection control information arriving on the control line, and also controls the output line to A communication node including control means for transmitting information necessary for connection control as a PB sound signal, comprising a PB sound generation circuit (7) for simultaneously and continuously generating all PB sounds; The output of the circuit (7) is fixedly connected to the input side of the switch, and the control means sequentially selects the output of the PB sound generation circuit (7) at the timing of the PB sound relay and connects the output to the output line. Control the switch (6) to connect The control unit (8) includes a wireless terminal arriving on a control line.
From the connection control information sent from (1) to the outgoing line
PB sound generation control means (9, 1) for analyzing information to be transmitted
0) and the control of the PB sound generation control means (9, 10).
A buffer that stores the connection control information analyzed by the order of arrival
Buffer means (12) and the contents of the buffer means (12).
Switch control for controlling the switch (6) with reference to the switch
Means (11), wherein the PB sound generation control means includes an input / output side switch of the switch.
Time slot number and the
A call path table indicating the telephone number that has begun to manage,
Enter the input time slot number of the sound source path of the switch PB sound.
The PB sound source path management table shown in FIG.
PB registration flag management table indicating whether or not the registration is being performed
And the buffer means (12) includes a queue in the connection control.
Dex, number of digits of PB signal requested to generate, request generation
Input / output side tie of PB signal and communication path of the switch
Time slot number and input side time of PB sound source path
Includes PB sound generation control signal accumulation table indicating lot number
Communication node according to claim no possible.