JPH07327022A - Line setting device - Google Patents

Abstract

PURPOSE:To utilize a transmission line effectively by allocating the interface of a request source to an idle band as a residual capacity of a transmission line not occupied by a 1st channel interface group in response to a line setting request from a 2nd channel interface group. CONSTITUTION:Channel interfaces CHA-1 to n belong to a low speed channel interface group 101 set by a fixed setting system and channel interfaces CHB-1 to 3 (102-104) belong to a low speed channel interface group 111 set by a setting request. Then the channel interface group 101 having a fixed speed is always allocated to a band A of a transmission line 109 and a remaining band B of the transmission line 109 is allocated after a setting request is set to the channel interface group 111. Then a line setting control section 107 manages the residual capacity of the band B and the capacity of the channel with a setting request and the residual capacity are compared to discriminate the propriety of allocation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line setting device, and more particularly, it accommodates channel interfaces for various media such as voice, image, data, and fax (facsimile), and multiplexes these to provide a transmission line such as a high-speed digital line. The present invention relates to a multiplexing method for multimedia to be sent to.

[0002]

2. Description of the Related Art In a conventional multimedia multiplexer of this type, various kinds of media information from a low-speed channel interface are efficiently multiplexed and a line (generally a time slot) of a transmission line such as a high-speed digital line is connected. When setting, the line is always set to the band on the transmission line based on the predetermined speed band information and connection route information for each accommodated channel interface. Has been adopted.

[0003]

In the line setting method in such a conventional multiplexer, the line is always set in the band on the transmission line for each low speed channel interface. Therefore, like LAN connection data, file transfer data, image signals, etc., the traffic is bursty (that is, the time when the line is used is indefinite and a short time or a specific short time, and when it is used, In the case of an interface having a characteristic that a wide band is required), there is a problem that the band allocated to it is not effectively used.

Therefore, the present invention has been made to solve the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a line setting device for effectively utilizing a transmission line. It is in.

[0005]

According to the present invention, a first channel interface group having a fixed data rate and always having a line setting, and a second channel group having a variable data rate and generating a line setting request. Accommodating interfaces and
A line setting device for setting a line of these channel interfaces to a transmission line of a predetermined capacity, comprising means for constantly setting the line of the first channel interface group, and the second device.
Line setting means for allocating the line setting to the remaining capacity of the transmission line which is not occupied by the first channel interface group in response to the line setting request from the channel interface group. A setting device is obtained.

[0006]

In the multimedia channel interface, a first channel interface group having a fixed data rate and always having a line setting, and a variable data rate having a line setting as necessary are sufficient. There are two channel interface groups. Therefore, in the present invention,
This request source interface is assigned in response to a line setting request from the second channel interface group in an empty band as the remaining capacity of the transmission line that is not occupied by the first channel interface group. is there.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a system block diagram of an apparatus according to an embodiment of the present invention. In the figure, the line setting switch 105 includes a plurality of channel interfaces CHA-1 to CHA-n,
CHB-1 to CHB-3 are accommodated, the respective channel interfaces are multiplexed, the line is set in the band of the transmission line 109, and the line interface (LIF) 108 is sent to the transmission line 109 as an upstream signal. On the contrary, it has a function of separating a downlink signal supplied from the transmission line 109 via the line interface 108 and switching it to a desired channel interface to derive it.

In this example, the channel interfaces CHA-1 to CHA-n are a group of low-speed channel interfaces in which a line is set by a fixed setting method, and the band A (equivalent to a time slot) of the transfer path 109 shown in FIG. 2 is used. It is assumed that the line is set.

Channel interface CHB-1 (10
2), CHB-2 (103), and CHB-3 (104) are low-speed channel interface groups whose lines are set in response to a setting request, and the band B of the transmission path 109 shown in FIG. ) Is set to the line.

In FIG. 2, the band A is 1024 Kb.
/ S (corresponding to 16 time slots), and the band B is 51
It is shown as being 2 Kb / s (equivalent to 8 time slots). The opposite station control signal 113 is transmitted and received through a control line which is always set exclusively between the opposite station devices, and the same line setting as the line setting executed by the main line setting switch 105 is transmitted to the opposite station. It is a control signal for notifying and executing.

In addition to the above functions, the line setting switch 105 has a line setting control unit 107, and this line setting control unit 107 includes a fixed setting type line setting control function and a setting request type line setting control function. .

The former fixed setting type line setting control function controls the fixed setting of the band A setting type low speed channel interface group 101. The latter setting request type line setting control function detects and responds to the line setting request from each of the interfaces 102 to 104 of the band B setting type low speed channel interface group 111 to perform the line setting control, and the remaining band B remains. It manages the capacity (remaining bandwidth) and calculates whether or not the required bandwidth is allocated to this remaining bandwidth.

The address control memory 106 is a control memory for actually allocating within the band B according to the band allocation mode determined by the line setting control unit 107.

Reference numerals 112-a and 112-b denote intra-device multiplexing buses.

In such a configuration, when there is no setting request at all, the occupied state of the total band (total capacity) of the transmission line 109 is as shown in FIG. 3A, and the band A has the channel interfaces CHA-1 to CHA. All -n fixed setting type interface groups are fixedly allocated.

Here, the low-speed channel interface group 1
It is assumed that the “setting request” is generated from the interface 102 out of 11. The "setting request" from the interface 102 is transferred to the line setting switch 105 via the data time slot exclusively assigned to the interface on the internal device multiplexing bus 112-a,
The information is sent to the line setting control unit 107.

In the line setting control unit 107, "setting request" information and "operational band" from the interface group 111.
Information is constantly monitored for each channel to check whether or not a "setting request" is generated, and the "setting request" generated from the interface 102 is detected. Interface 10
The "operable bandwidth" information transferred together with the "setting request" from No. 2 is fixed at 384 Kb / s, and since the bandwidth B has an effective free bandwidth of 512 Kb / s at this point, the "setting request" of the interface 102 is "Setting state = ON" information and setting band = 384 indicating that the line setting has been accepted and the setting has succeeded at the same time via the downlink data time slot for the interface 102.
Kb / s "information is fed back.

It should be noted that this information, that is, the line setting for the interface 102 executed in this device must be executed in the opposite device as well, and as described above, this is for control which is always set exclusively between the opposite devices. This is realized by transferring the game control signal 113 from the line setting control unit 107 to the opposite device through the line.

The state at this time is shown in FIG. 3B, and the remaining effective free band of the band B is 128 Kb / s.

Next, assume that a setting request is issued from the interface 104 in this state. Also in this case, similarly, the “setting request” from the interface 104 and the accompanying “operable band” information are transferred to the line setting control unit 107. Interface 104 operable bandwidth = 128K
b / s to 256 Kb / s ", so 128 in the lowest low range
It can be set if it is Kb / s. Therefore, 128 Kb for "setting request" from this interface 104.
The setting is executed in the band of / s.

The result is the above-mentioned interface 102.
As in the case of, the “setting state = ON” information and “setting band = 128K” indicating that the setting has succeeded through the downlink data time slot for the interface 104.
b / s ”information is fed back. In this case as well, as in the case of the interface 102, the signal 113 transmits the signal 113 to the opposite device through a dedicated control line.
It will be notified from 07.

The state at this point is shown in FIG. 3C, and the remaining effective free band of the band B is zero. Therefore, after this, the interface 102 or 104 makes a “setting request”.
Until the setting is canceled, the setting cannot be made even if the interface 103 issues a "setting request".

[0024]

According to the present invention, by dividing the band of the transmission path into the band A for fixed setting and the band B for dynamically setting according to the setting request from the accommodated channel interface, the traffic can be reduced. It is preferable to keep the line occupied on average and continuously all the time.For the interface, the line is set in the fixed setting format as before, and the traffic is irregularly generated, the duration is short, and a wide band is occupied. For an interface with such characteristics, set it after considering the effective free bandwidth of the corresponding transmission line each time it occurs, from the "setting request" from that interface and the "operational bandwidth" information notified with it. By calculating the bandwidth and setting the line based on the result, it is possible to effectively use the limited bandwidth of the transmission path. It has the effect of.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing a band example of a transmission path.

FIG. 3A shows the case where there is no request for setting to band B,
FIG. 7B is a diagram showing a band occupation state of each transmission line when one setting request is generated and FIG.

[Explanation of symbols]

 101 band A setting type low speed channel interface group 105 line setting switch 106 address control memory 107 line setting control unit 108 line interface 109 transmission line

Claims (3)

[Claims] 1. A first channel interface group, which has a fixed data rate and is constantly set by a line, and a second channel interface group, which has a variable data rate and generates a line setting request, accommodate a predetermined capacity. A line setting device for line setting these channel interfaces to a transmission line, comprising means for constantly setting the first channel interface group, and responding to the line setting request from the second channel interface group. A line setting device for allocating the line setting to the remaining capacity of the transmission line that is not occupied by the first channel interface group. 2. The line setting means is configured to perform line setting according to the data rate of the channel interface for which the line setting request has been made and the available capacity of the transmission line at that time. The line setting device according to claim 1. 3. The line setting device according to claim 1, wherein each of the first and second channel interface groups is an interface of various information media.