JPH0927793A - Line setting method for multimedia multiplexer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the transmission efficiency as a whole by temporarily storing a terminal system channel, for which connection delay is allowed, in a buffer memory and allocating this channel when an empty space is generated in a demand band. SOLUTION: When a connection request signal is outputted from a voice system channel or a terminal system channel, while referring to a table 41, a control part 4 identifies whether it is a voice system or a terminal system and further discriminates whether the connection delay is allowed for the terminal system or not. Concerning the voice system or the terminal system for which the connection delay is allowed, a switch 1 is controlled, connected to a time-division multiplex processing part 5 and preferentially allocated to the demand band. On the other hand, the terminal system, for which the connection delay is not allowed, is temporarily stored in a buffer memory 3. The control part 4 monitors the time-division multiplex processing part 5 and when the empty space is generated in the demand band, the terminal system channel in the buffer memory is allocated while referring to a table 42. When the buffer memory 3 overflows, the connecting processing of a bypass line is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line setting method for a demand assign type multimedia multiplexer.
In particular, it relates to line setting when voice channels and terminal channels coexist.

[0002]

2. Description of the Related Art Conventionally, in the line setting method of this kind of multimedia multiplexer, there is a demand processing section for performing this line setting processing in front of the time division multiplexing processing section, and each demand channel is connected to this demand processing section. The time-division multiplexing processing unit is controlled by the connection request signal of the demand channel which is once accommodated and called, and the demand channel is allocated to the empty demand band.

The demand bands are allocated in the order of the hoaxes and calls in which calls were made, and when the band is full, the demand lines are allocated to a detour line prepared such as a public line. Further, connection refusal is performed for further calls.

[0004]

As described above, in the conventional example, the demand band is immediately allocated to the demand channel call as long as the demand band is available. However, when the demand band is full, the overflowed demand Connection is refused to the channel, or a detour such as a public line is assigned.

In general, the number of calls on the demand channel fluctuates with time. Therefore, the overflow channels increase during the time when the calls are concentrated, and the demand bandwidth becomes vacant during the time when the calls are not concentrated, resulting in a decrease in the transmission efficiency as a whole. There is a problem of doing.

[0006]

According to the line setting method of a multimedia multiplexer of the present invention, a demand channel is classified into a voice system channel and a terminal system channel, and there is no allowable time until connection with the voice system channel. For channel calls, this is preferentially allocated to the demand band, and there is an allowable time until connection.For the terminal channel calls, it is temporarily stored in the buffer memory and allocated when the demant band is available. There is. Further, when the buffer memory overflows, the overflowing terminal channel may be connected to a public line and bypassed.

[0007] More specifically, a table in which the classification of voice channels or terminal channels for each demand channel and the allowable time until connection, the data rate, and the connection time for the terminal channels are registered in advance, In the former case, by referring to the table for the call of the demand channel, it is discriminated whether the audio system channel or the terminal system channel having an allowable time until connection of 0 or the terminal system channel having a non-allowable time until connection of 0 Is connected to the time division multiplexing unit for immediately allocating it to the demand band, and in the latter case, it is connected to the buffer memory by the first switch means, and the demand band of the time division multiplexing device is monitored to be free. When there is a second table, the terminal channel stored in the buffer memory is connected to the time division multiplexing unit by referring to the table. And a switch means.

When the buffer memory overflows, the second switch means may be provided with a function for connecting further calls of the terminal channel to the public line and bypassing the calls.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a multimedia multiplexing apparatus. FIG. 2 shows FIG.
A data type table included in the control unit of FIG. 3, and FIG. 3 is a connection information table.

The buffer memory 3 for accumulating the data of the terminal channel and the transmission data from the demand channel are immediately assigned to the time slot of the demand band by the time division multiplex processing unit 5 or temporarily stored in the buffer memory 3. Switch 1 for switching between accumulation and buffer memory 3
A switch 2 for selecting whether to output the data stored in the time division multiplex processing unit 5 or the detour line;
It comprises a switch 1 and a controller 4 for controlling the switch 2.

The control unit 4 classifies terminal channels and voice channels for each received demand channel,
Further, it internally has a table 41 for registering an allowable time of connection delay for a terminal system channel and a table 42 for calculating and registering a data capacity from the data speed and connection time of the terminal system channel. This table 41,
Each of these pieces of information is registered in 42. Also, the capacity of the buffer memory 3 is determined to be a statistically appropriate capacity from each information of the table 42.

When the connection request signals 102 and 103 are output from the voice channel and the terminal channel, the control unit 4 refers to the table 1 to identify whether the data type is the voice channel or the terminal channel. To do.

When the demand channel is a voice channel in which connection delay is not allowed, the switch 1 is controlled to output the data 101 to the time division multiplexing processing 5, and the time slot is preferentially allocated to the demand band.

When the demand channel is a terminal system channel, the allowable connection delay time in Table 1 is referred to, and when the connection allowable time t = 0, the same as in the case of the voice system channel.
The data 103 is output to the time division multiplex processing unit 5, and the time slot is assigned to the demand band. When the connection permissible time t ≠ 0, the first switch unit 3 is controlled and the buffer memory 3
To accumulate.

After accumulating the terminal channel data 103 in the buffer memory 3, the control unit 4 starts monitoring the demand demand free band for the time division multiplexing processing unit 5 and refers to the table 2 to allow the connection delay. When an empty band occurs in the demand band within the time, the switch 2 is controlled, data is output to the time division multiplex processing unit 6, and time slot allocation to the demand band is performed.

While the terminal system data 103 is being stored in the buffer 3, when the data stored in the buffer 3 exceeds a predetermined capacity, or during the connection allowable time t, an empty band is set as the demand band. If it cannot be detected, the terminal system channel is determined to be an overflow call, the line connection processing of the public network, which is a detour line, is performed, and then the switch 2 performs the switching operation according to the instruction of the control unit 4, and the data in the buffer memory 3 is changed. Is output to the connected public line.

[0017]

As described above, according to the line setting method of the multimedia multiplexer of the present invention, voice channels and terminal channels which are not allowed to have connection delays are preferentially assigned to demand bands, and connection delays are allowed. Since the terminal channel is temporarily stored in the buffer memory and is allocated when the demand band has an empty space, there is no free time in the transmission path, and the transmission efficiency is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a multimedia multiplexing apparatus of the present invention.

FIG. 2 is a block diagram showing an example of contents of a table 41 of FIG.

3 is a block diagram showing an example of the contents of a table 42 of FIG.

[Explanation of symbols]

 1, 2 switch 3 buffer memory 4 control unit 5 time division multiplexing processing unit

Claims (4)

[Claims] 1. A demand channel is classified into a voice system channel and a terminal system channel, and for a call of a terminal channel for which there is no allowable time until connection with the voice system channel, this is preferentially assigned to a demand band until connection. The line setting method of the multimedia multiplexer, wherein the call of the terminal channel having the allowable time is temporarily stored in the buffer memory and is allocated when the demant band is available. 2. The line setting method for a multimedia multiplexer according to claim 1, wherein when the buffer memory overflows, the overflowing terminal system channel is connected to a public line and bypassed. 3. A table in which a classification of voice channels or terminal channels for each demand channel is registered in advance, and a permissible time until connection, a data rate, and a connection time are registered for the terminal channels, and a table of the demand channels For the call, by referring to the table, it is discriminated whether the channel is the voice channel or the terminal channel whose permissible time until connection is 0 or the terminal channel whose permissible time before connection is not 0, and in the former case, immediately First switch means for connecting to the time division multiplexer for allocation to the demand band, and in the latter case for connecting this to the buffer memory, and when the demand band of the time division multiplexer is monitored and there is a space A second connecting the terminal system channel stored in the buffer memory to the time division multiplexing unit by referring to the table;
A switch setting method for a multimedia multiplexing apparatus, comprising: 4. The second switch means, when the buffer memory overflows, for adding more calls to the terminal channel to the public line to bypass the call. Item 3. A line setting method for a multimedia multiplexer according to item 3.