JP2630214B2 - Time division multiplexer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a time division multiplexer.
Especially when setting channels in a time division multiplexer.
Or, tea and flexibly respond to the request for a new channel utilization
Related to a time-division multiplexing device that can set the
You .

[0002]

2. Description of the Related Art Conventionally, a channel set in a time-division multiplexing device is known.
Nell, those <br/> fixedly set based on the channel allocation information previously prepared were common. Therefore , time-division multiplexing is required in line with the expansion of network system equipment, etc.
If it becomes necessary to increase the number of channels used by the device, such channel assignment information should be newly created and
It is supported by downloading to the split multiplexing device.
Was .

[0003]

However, this is not the case.
In such a conventional technique, a channel set in a time-division multiplexing device is set.
The channel is fixed by the channel assignment information input to the device.
It is decided fixedly, and when changing the setting, a new
Create channel allocation information and submit it to the time division multiplexer
I had to fix it. For this reason, can not timely response also to the use request of the new channel, network
There was a disadvantage that the operation of the network system was inflexible .

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional disadvantages described above. In response to a new channel use request, a time division multiplexing device automatically executes channel allocation control, and is flexible and timely. It is an object of the present invention to provide a time division multiplexing device which can cope with such problems.

[0005]

SUMMARY OF THE INVENTION A time division multiplexing apparatus according to the present invention comprises a channel interface unit for connecting and accommodating a terminal device, a line interface unit for accommodating a transmission line, and logical channel allocation of the channel interface unit. A multiplexing setting unit that accumulates and outputs virtual channel information used for, and time-division multiplexes signals input from the channel interface unit and outputs them to the line interface unit,
And a multiplexing unit that separates the time-division multiplexed signal input from the line interface and outputs the same to the channel interface unit. The multiplexing unit inputs the virtual channel information output from the multiplexing setting unit, and logically associates the channel numbers of the channel interface units input / output to / from the multiplexing unit with the time slot positions to be multiplexed and separated. Virtual channel access signal for efficient channel allocation and line interface
Timing of input / output of multiplexed signals input / output to
And an address generator for creating and that line access signal. The channel interface unit includes a channel use declaration unit that is connected to the channel interface unit and outputs terminal device information in use. Then, when the terminal device information is input from the channel use declaration device, logical channel allocation is performed by associating the channel number of the channel interface unit of the terminal device with the virtual channel access signal output by the address creator, A channel assignment control unit is provided for controlling transmission of the logical channel assignment information to the time division multiplexing device on the communication partner side.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing an example of a communication network system to which the time division multiplexing device of the present invention is applied. In order to simplify the description, a network in which the time division multiplexing device is composed of only two devices is shown. Represents the system. Incidentally, the present invention
Is not limited by the number of time division multiplexers installed in the network system .

[0008] In FIG. 1, 1-1 division multiplexer when applying the present invention, 1-2 is a channel allocation control unit to be described later, the channel assignment information set in the channel assignment control unit 1-3 To the time-division multiplexer on the other end of the communication
Called control path for transmission
This is a control transmission path. The control path 1-3 can be realized, for example, by allocating a part of a band in a transmission path denoted by a reference numeral 1-4 connecting the time division multiplexers. Channel assignment set by channel assignment control unit 1-2
This information is time-shared by the communication partner through control path 1-3.
Transmitted to the channel assignment control unit of the multiplexer,
The same channel assignment is performed in the division multiplexing device.

Next, in order to facilitate understanding of the present invention, FIG.
The outline of the conventional time-division multiplexing device will be described with reference to FIG.
2-1 division multiplexer conventional time, in which shows by blocking its internal. The channel interface unit 2-2 is connected to this time division multiplexing device such as a terminal device.
Interface device for converting a signal transmitted / received to / from an external device , such as an external device.
CCITT V. 28 recommended signals and time-division multiplexing equipment
Conversion to TTL level signals used for
U. Time-division multiplexers usually have multiple channel interfaces.
It has a source part . Line interface section 2-3
Is a signal multiplexed through a multiplexing unit 2-4 described later.
And the transmission used for communication with the time-division multiplexer on the other end of the communication
An interface unit that converts signals on the road.
For example, the TTL level used for processing in the time-division multiplexing device
Bell signal and CCITT G. 703 Recommendation
And conversion of the signal .

The multiplexing section 2-4 is arranged between the channel interface section 2-2 and the line interface section 2-3.
It is, received from a plurality of channel interface units 2-2
Multiplexed signals and transmit them to line interface unit 2-3
Received from the line interface unit 2-3 .
Separating the multiplexed signal to the channel interface unit 2-2
To communicate. The multiplexing unit 2-4 performs such multiplexing.
Channel access, which is a signal for performing
Address generator for generating source and line access signals
2-6 .

The multiplex setting unit 2-5 stores information defining how the multiplex unit 2-4 operates, transmits the information to the multiplex unit 2-4, and operates the multiplex unit. Let it.

The multiplexing section 2-4 will be described in more detail. Based on the information transmitted from the multiplexing setting unit 2-5, the multiplexing unit 2-4 multiplexes the signal of the specific channel interface unit 2-2 at a specific time slot position on the time axis. A creator 2-6 creates a channel access signal. At the timing of this channel access signal, the signal of the specific channel interface unit 2-2 is multiplexed on the time axis at the position of a specific time slot. Furthermore,
The multiplexed signal is transmitted to the line interface unit 2-3 at the timing of the line access signal generated by the address generator 2-6, and transmitted to the partner time division multiplexing device.

Conversely, a signal transmitted from the other party's time division multiplexing device is received by the line interface unit 2-3, and at the timing of the line access signal generated by the address generator 2-6. The signal is taken into the multiplexing unit 2-4, separated into signals corresponding to the respective channel interface units 2-2, and transmitted to the specific channel interface unit 2-2 at the timing of the channel access signal generated by the address generator 2-6. It is transmitted to a terminal device or the like.

FIG. 3 shows an example of the signal flow described above.

Now, the present invention is applied to the conventional time-division multiplexing apparatus described above, in which the channel allocation control unit 1-2 shown in FIG.
, Which will be described in detail below. FIG. 4 shows an example of a block diagram in the time division multiplexing device of the present invention.

The multiplex setting unit 4-1 is provided in the conventional multiplex setting unit shown in FIG.
Function similar to that of multiplex setting section 2-5 of the time-division multiplexing apparatus
Has the information about the channel interface unit is not the real information corresponding to the conventional physical channel, storing channel used logically division within multiplexer when a temporary <br/> virtual information. This virtual information performs the multiplexing function.
Discuss the maximum number of channels of the emerging time-division multiplexer.
This is setting information that can be set physically. For example, hours and minutes
Currently 10 terminal devices, etc., accommodated in the split multiplexing device
However without physically be 10 channels only there is no need to multiplex, the time division multiplexer Nde expected the possibility of future expansion of
In multiple possible maximum number of channels, such as those set aside a 1000 channel information to a virtual enemy. Also many
The multiplexing setting unit 4-1 also stores control path setting information for transmitting a signal of a communication controller 4-10 that performs communication control of channel assignment information with a time division multiplexing device on the communication partner side , which will be described later. Has functions. The signal of the multiplex setting unit 4-1 is transmitted to the multiplex unit 4-2 and the channel assignment control unit 4-3.

The multiplexing unit 4-2 performs multiplexing / demultiplexing based on the signal of the multiplexing setting unit 4-1 in the same manner as in the conventional system. Here, the channel access signal generated by the address generator 4-6 in the multiplexing unit 4-2 is a virtual channel access signal because the channel information of the multiplexing setting unit 4-1 is virtual information. . The channel allocation control unit 4-3 includes a channel use detector 4-7 and an address converter 4-8 for converting a virtual channel access signal into a real channel access signal.
And a communication controller 4-10 for controlling communication of channel allocation information between the other party's time division multiplexing device and a controller 4-9 for controlling channel allocation.

The channel use detector 4-7 detects whether or not the channel interface unit 4-4 is actually used, and transmits the detected information to the controller 4-9. As specific detection information, for example, mounting information that the hardware of the channel interface unit 4-4 is mounted on the time division multiplexing device,
CCITT V. Various types of information such as the information that the ER signal of the H.24 recommendation is turned on can be considered, but the type of the detection information source does not matter.

The controller 4-9 includes a channel utilization detector 4-
7 (the channel interface unit 4-
Based on the actual information) corresponding to the fourth physical channel, multi
Channel use detection is performed using the timing of any particular virtual channel access signal in the virtual channel access signal group created by the address creating unit 4-6 of the multiplexing unit 4-2.
Channel interface unit 4 transmitted from unit 4-7
It is determined at which time slot position on the time axis the signals corresponding to the four physical channels are multiplexed, and the resulting determination information is transmitted to the address converter 4-8 . . This
Terminal accommodated in the channel interface unit 4-4
Physical channels and time-division multiplexing devices corresponding to devices
Was associated with the virtual channel used for control within
Will be. Also, here convey information determined to division multiplexer when the communication partner, by also perform control of the same correspondence to the division multiplexer when the other party between both devices Ji <br/> Yaneru since communication is possible, to transmit the same determination information to the communication controller 4-9 in this order. The number of controllable channels can be up to the number of virtual channels defined by the multiplex setting unit 4-1.

The address translator 4-8, according to the judgment information transmitted from the controller 4-9, receives a specific virtual channel access signal from the group of virtual channel access signals transmitted from the address generator 4-6. The address is converted into an actual channel access signal for accessing the specific channel interface unit 4-4 and transmitted to the specific channel interface unit.

The communication controller 4-10 converts the judgment information transmitted from the controller 4-9 into a communicable signal and transmits it to the multiplexing unit 4-2 in order to transmit the information to the other party's time division multiplexer. After that, the data is transmitted to the other party's time division multiplexer via the line interface unit 4-5. The communicable signals include CCITT X. HDL of 25 Recommendations
Various protocols such as the C procedure are conceivable, but the type does not matter.

Conversely, when the judgment information is transmitted from the other party's time division multiplexer, the communication controller 4-10
Analyzes this determination information and outputs the channel utilization detector 4-7.
To the controller 4-9 in the same format as the information detected in
The controller performs the same control as that for controlling the information from the channel use detector 4-7, and transmits the information to the address converter 4-8.

The channel interface unit 4-4 has a channel interface detection unit 4-7 of a channel assignment control unit 4-3 in addition to the functions of the channel interface unit of the conventional time division multiplexer. And a channel use declaration unit 4-11 for transmitting the use of the unit. As described above, the channel use declaration device 4-11 does not care about the type of information source used.

The line interface unit 4-5 is exactly the same as the line interface unit of the conventional time-division multiplexing apparatus, and multiplexes the signal transmitted from the multiplexing unit 4-2 to the line access unit 4-6 of the address generator 4-6. Capture by signal,
An interface unit with an external device for transmitting a signal to a transmission path used for communicating a multiplexed signal with a counterpart time-division multiplexing apparatus or receiving a signal from the transmission path and transmitting the signal to the multiplexing unit 4-2. It is.

[0025]

As described above, the time division multiplexer according to the present invention is mounted on the channel interface unit.
Automatically recognizes terminal devices, etc., and
A number of channels are predefined in the time division multiplexer.
Channel assignment by associating with the virtual channel
Since control is performed, each time a terminal device is added as in the past,
There is no need to input detailed and fixed setting information. So
Communication using the time division multiplexer according to the present invention
Network system is a communication network system
Flexible network for easy design
This makes it possible to construct a network and to timely change the communication network system.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a communication network system to which a time division multiplexer according to the present invention is applied.

FIG. 2 is a block diagram illustrating an example of a conventional time division multiplexing device.

FIG. 3 is a flowchart showing time division multiplexed signals.

FIG. 4 is a block diagram showing an embodiment of a time division multiplexer according to the present invention.

[Explanation of symbols]

 4-1 Multiplexing setting unit 4-2 Multiplexing unit 4-3 Channel allocation control unit 4-4 Channel interface unit 4-5 Line interface unit 4-6 Address creator 4-7 Channel use detector 4-8 Address conversion Unit 4-9 Controller 4-10 Communication controller 4-11 Channel use declaration unit

Claims (1)

(57) [Claims] 1. A channel interface unit for connecting and accommodating a terminal device, a line interface unit for connecting and accommodating a transmission line, and a multiplex setting for accumulating and outputting virtual channel information used for logical channel assignment of the channel interface unit. And a multiplexing unit that time-division multiplexes a signal input from the channel interface unit and outputs the multiplexed signal to the line interface unit, and separates a time-division multiplexed signal input from the line interface and outputs the multiplexed signal to the channel interface unit A multiplexing unit, wherein the multiplexing unit inputs virtual channel information output by the multiplexing setting unit, and inputs / outputs the channel of the channel interface unit to / from the multiplexing unit. Logical channel assignment by associating numbers with multiplexed and separated time slot positions A virtual channel access signal for the line interface unit
An address creator for creating a line access signal serving as an input / output timing of a multiplexed signal to be input / output to / from the terminal; the channel interface unit outputs terminal device information that is connected to and accommodated by the channel interface unit and is in use When a terminal device information is input from the channel use declarer, a channel number of the channel interface unit of the terminal device is logically associated with a virtual channel access signal output by the address generator. A time-division multiplexing apparatus comprising: a channel allocation control unit for performing a proper channel allocation and transmitting the logical channel allocation information to a time-division multiplexing apparatus on the communication partner side.