JPH1066173A - Channel-allocating device and channel-allocating method of multiple communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the utilization efficiency of a data channel and also to enable fast allocation processing. SOLUTION: This device is provided with a transmitting part 4b which secures a specific channel of a transmission line of terminal stations 6 and 10 and transmits it to a base station 3 when a call occurs, a detecting part 4a which secures the specific channel that is transmitted by the station 3 to the stations 6 and 10 for the stations 6 and 10 and performs channel detection to allow the terminals 6 and 10 to use it, a connecting part 4c which connects the specific channel that is transmitted by the part 4b to a specific channel of an interface of an ISDN exchange 1, and a connecting part 4c which connects a specific channel of the exchange 1 which is contained in subscriber's terminals 9 and 13 which notify that a call occurs by a terminal station which receives the notice of use permission and the specific channel of a transmission line. Thereby, since only necessary data channels can be acquired, a data channel which is held by invalidness can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a channel allocating device and a channel allocating method for a multiplex communication system, and more particularly to a channel allocating device and a channel allocating method for a multiplex communication system used for a line such as an ISDN line.

[0002]

2. Description of the Related Art Conventionally, as described in, for example, Japanese Patent Application Laid-Open No. 3-162147, a channel allocating apparatus of this type of multiplex communication system includes a D channel in which each communication channel is a signal channel, a data channel, and a data channel. B channel. For example, when a channel is composed of 2B + D like a basic interface of an ISDN line, a communication channel of 2B + D is fixedly allocated irrespective of the number of used channels of the data channel. Further, when a subscriber company terminal device needs a channel, the control device can allocate the channel to a necessary channel using a control channel dedicated to channel allocation. This control channel is composed of a subscriber terminal number, control information, and a communication channel number. Therefore, in such an apparatus, one channel is allocated by one control order, and three control order transmissions are required to allocate three channels of 2B + D.

[0003] Conventionally, channel allocation devices include:
A demand assignment type allocating device that allocates a communication channel between a base station and a terminal station only when a call occurs to a subscriber terminal device has been used.

[0004]

However, in the channel allocating apparatus of the conventional multiplex communication system, the channel which one subscriber terminal wants to use is only one of the B channel and the D channel, or only the D channel. If the other one or two B-channels of the communication channel are invalidated and put on hold at the time of, when another subscriber terminal wants to use the channel under demand assignment, there is a channel that is not being used. Nevertheless, the subscriber terminal device may not be able to use the channel. Therefore, the communication channel is 2
In a ternary multiplex communication system or the like which is fixedly configured as B + D, there is a problem that a channel which is suspended due to invalidity under demand assignment occurs and the use efficiency of the communication channel is reduced.

[0005] In addition, the conventional channel allocating device can allocate only one channel to one subscriber terminal device in one frame. Therefore, when a plurality of subscriber terminal devices request channels at the same time, all subscriber channels are requested. It took time to finish notifying the user terminal device of an available channel. Therefore, in such a device, the D channel and B
Since channel assignment is performed after a request from the subscriber terminal device for channel assignment, it takes time to acquire a channel when a channel assignment request is issued from multiple subscriber terminal devices simultaneously. was there.

It is an object of the present invention to perform high-speed allocation processing by eliminating data channels that are suspended due to invalidation and improving the use efficiency of data channels.

Another object of the present invention is to notify a subscriber terminal device of a data channel that can be used at the time of making a call, thereby enabling quick acquisition of a data channel and improving transmission efficiency.

[0008]

According to the present invention, there is provided a multiplex communication system for allocating a communication channel between a base station and a terminal station when a call is generated in a subscriber terminal. In the channel allocation device, a terminal station secures a specific channel of a transmission path when a call occurs, a reporting means for reporting to the base station, and a specific channel reported by the base station for the terminal station, Means for permitting use of the terminal, first connecting means for connecting to the specific channel reported by the reporting means and the specific channel of the interface of the exchange, And a second connection means for connecting the specific channel of the exchange housed in the subscriber terminal device which has notified the above and the specific channel of the transmission line.

Therefore, according to the present invention, a D channel, which is a signal channel, is allocated to each subscriber terminal device,
By notifying the terminal station accommodated in the subscriber terminal device of the B channel which is a common data channel, it is possible to shorten the time for acquiring the channel. In addition, the subscriber terminal device can request the necessary number of data channels from the terminal station using the signal channel at the time of calling. In addition, the terminal station that has received the request can use the required number of data channel use requests that have already been notified to the base station. As a result, only the necessary data channels can be acquired, and the data channels that are suspended due to invalidation can be eliminated.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A channel allocating apparatus and a channel allocating method for a multiplex communication system according to an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a channel allocation device of a multiplex communication system according to one embodiment of the present invention. In FIG. 1, a channel allocating device is an base station 3 having an ISDN exchange 1, subscriber terminal devices 9 and 13, and a control device 4 for controlling the connection therebetween.
And terminal stations 6, 10 having control devices 7, 11 for controlling communication between the subscriber terminal devices 9, 13 and the terminal stations 6, 10.
It consists of.

[0011] Between the ISDN exchange 1 and the base station 3, I
ISDN line 1 using SDN basic interface 2
00 is connected. The base station 3 and the terminal station 6 are connected by a multi-way multiplex communication transmission line 102. Further, between the terminal stations 6 and 10 and the subscriber terminal devices 9 and 13, ISDN lines 104 and 106 are
Connect to each other. The control device 4 in the base station 3
A B channel, which is a data channel for calling, and a B channel, which is a data channel of the ISDN basic interface 2, are connected to each of the terminal stations 6 and 10. In addition, terminal stations 6 and 1
0, the control devices 7, 11 are connected to the respective subscriber terminal devices 9,
A detecting unit 4a for detecting a call by a D channel which is a signal channel from the transmitting unit 13; and a transmitting unit for transmitting a required number of data channel use requests of the subscriber terminal devices 9 and 13 to the base station 3. 4b and multidirectional multiplex communication transmission line 10
2 and a connection unit 4c for connecting the channel of the ISDN basic interface 2.

Next, the operation of the channel allocating device of the multiplex communication system according to the embodiment of the present invention will be described with reference to the sequence diagram of FIG. In the description of the operation, FIG. 1 is referred to. In the following processing, processing 1 is described as T1.

In T1, control unit 4 of base station 3
Are all terminal stations 6 under one or more base stations 3
10 is notified of a B channel, which is a data channel for calling, via the multi-way multiplex communication transmission line 102. Next, in T2 to T4, the subscriber terminal devices 9 and 13 set the ISDN basic interface 8 for setup.
The number of B channels to be used for calling and using the D channel which is a signal channel allocated through the ISD from the control devices 7 and 11 of the terminal stations 6 and 10 via the base station 3
The N exchange 1 can be notified.

Next, in T5 to T9, the ISDN exchange 1, the base station 3, the terminal stations 6, 11 and the subscriber terminals 9, 13 are called, and a setup permission signal is transmitted from the base station 3 to the terminal stations 6, 10. . As a result, the control device 7 of the terminal station 6 can secure the B channel for calling that has been notified in advance from the base station 3 and notify the control device 4 of the base station 3 of the use of the secured B channel. it can. That is,
The control device 4 of the base station 3 confirms that the B channels notified by the terminal stations 6 and 10 are not the B channels allocated to the other terminal stations, and then transmits a setup permission signal in each of T8 and T9. Can be notified to the terminal stations 6 and 10 that use. Also, the control devices 7, 11 of the terminal stations 6, 10 which have received the setup permission signal.
Is connected to the B channel of the multi-way multiplex communication transmission line 102 on the base station 3 side and the data channel which is the B channel of the ISDN basic interfaces 8 and 12 on the subscriber terminal devices 9 and 13 side.

Next, at T10, the base station 3 notifies the terminal stations 6 and 10 of a data channel for calling. That is, a new B channel for calling can be secured in place of the B channel allocated to the terminal stations 6 and 10, and the new B channel can be notified to one or more terminal stations 6 and 10. When the above processing is completed, T11 to T13
Thus, the subscriber terminal devices 9 and 13 can be sequentially called via the ISDN exchange 1, the base station 3, and the terminal stations 6 and 10.

Next, another operation of the channel allocating apparatus of the multiplex communication system according to the embodiment of the present invention will be described with reference to FIG. This operation will be described with reference to FIG.

In T30 and T31, the control device 4 of the base station 3 notifies one or more terminal stations 6 and 10 under the control of the plurality of base stations 3 of the B channel which is a different data channel. deep. That is, at this time, the control device 4 of the base station 3 can notify each of the terminal stations 6 and 10 of a different B channel for calling.

At T32, the subscriber terminal device 9 sets the I
Using the D channel, which is a signal channel allocated via the SDN basic interface 8, the number of B channels, which is the number of data channels to be used for calling, is used for the terminal station 6.
To the control device 7. Thus, the setup on the D channel in the terminal device 6 is completed.

Next, at T33, the terminal station 6 sets up the base station 3 in the D channel with respect to the base station 3. Then, at T34, the base station 3 instructs the ISDN exchange 1 to perform the setup. I do.
Subsequently, at T35, a command for calling the D channel is issued from the ISDN exchange 1 to the terminal station 6 via the base station 3. At this time, at T36, the base station 3 notifies the terminal station 6 of the B channel for calling of the terminal station 6.

Next, at T36-1, the subscriber station 13 passes through the subscriber terminal 9 to the terminal station 10 via the subscriber terminal 9.
Is notified of the number of D channels, and the terminal station 10 connects to the B channel. That is, T36, 36
In -1, the terminal device 7 of the terminal station 6 that has received the reception information notified to the control device 7 secures a B channel for calling that has been notified in advance from the base station 3 and performs multi-directional communication on the base station 3 side. The B channel of the multiplex communication transmission line 102 and the B channel of the ISDN basic interface 8 on the side of the subscriber terminal device 9 are connected, and the start of use of the B channel secured to the control device 4 of the base station 3 is set together with the setup instruction. 3 notifies the terminal station 6.

Further, in T37 to T39, the terminal station 1
0 to the base station 3 via the terminal station 6 to instruct the base station 3 to set up a D channel.
The N exchange 1 is notified of the information of the B channel to be used. Accompanying this, at T38, the signal channel which is the D channel is called. Accordingly, at T39,
The base station 3 calls the terminal station 10 for a data channel which is a B channel for calling the terminal station 10.

By the above processing, each subscriber terminal device 9,
Since the data channel, which is the B channel, between 13 can be secured without waiting for the reply from the base station 3, the channel can be secured more quickly.

Therefore, according to the present embodiment, a D channel, which is a signal channel, is allocated to each of the subscriber terminal devices 9 and 13, and the terminal stations 6 and 10 accommodated by the subscriber terminal devices 9 and 13 are allocated to the D channels. By notifying the B channel, which is a common data channel, the time required for channel acquisition can be reduced.

In this embodiment, the subscriber terminal devices 9, 1
No. 3 can request the required number of data channels from the terminal stations 6 and 10 using the signal channel at the time of calling. In addition, the terminal stations 6 and 10 that have received this can transmit to the base station 3 the necessary number of data channel use requests that have already been notified. As a result, only the necessary data channels can be acquired, and the data channels that are suspended due to invalidation can be eliminated.

[0025]

As described above, the channel allocating apparatus and the channel allocating method of the multiplex communication system according to the present invention provide the required number of data channels only for the subscriber who needs the data channel which is the B channel. Since the data channels can be allocated, the data channels can be used effectively.

Further, according to the present invention, since the data channel which is the B channel for calling is already notified, the channel can be used only by confirming that there is no contention for securing the data channel. And the like.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a channel allocation device and a channel allocation method of a multiplex communication system according to an embodiment of the present invention.

FIG. 2 is a sequence diagram illustrating an operation of the channel allocation device of the multiplex communication system of FIG.

FIG. 3 is another sequence diagram illustrating the operation of the channel allocation device of the multiplex communication system of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ISDN exchange 2 ISDN basic interface 3 Base station 4 Control device 6 Terminal station 7 Control station 8 Interface 9 Subscriber terminal device 10 Terminal station 11 Controller 12 Interface 13 Subscriber terminal device 100 ISDN line 102 Multi-way multiplex communication transmission line

Claims (4)

[Claims] 1. A base station connected to an exchange, a terminal station connected to the base station, and a subscriber terminal connected to the terminal station, and only when a call is generated to the subscriber terminal. A channel allocating device of a multiplex communication system for allocating a communication channel between the base station and the terminal station, wherein when the call occurs, the terminal station secures a specific channel of a transmission path and reports to the base station. A reporting unit that secures the specific channel reported by the base station for the terminal station, and a permission unit that permits the terminal station to use the specific channel. First connection means for connecting a specific channel of the interface of the exchange, and the subscriber terminal device in which the terminal station having received the use permission report has notified the occurrence of the call. And a second connection unit for connecting a specific channel of the exchange housed in the communication channel and a specific channel of the transmission line. 2. The terminal station secures a specific channel of a multi-way multiplex communication transmission path from the transmission path, reports to the base station, and reserves the specific channel reported by the base station for the terminal station. 2. The channel allocating apparatus according to claim 1, wherein the terminal station is notified of the specific channel that can be used at the time of calling. 3. A base station connected to an exchange, a terminal station connected to the base station, and a subscriber terminal connected to the terminal station, and only when a call is generated to the subscriber terminal. A channel allocation device of a multiplex communication system for allocating a communication channel between the base station and the terminal station, wherein when the call occurs, the terminal station secures a specific channel of a transmission path and reports to the base station. Securing the specific channel reported by the base station for the terminal station, and permitting the terminal station to use, connecting to the reported specific channel and the specific channel of the exchange. And a specific channel of the exchange housed in the subscriber terminal device, wherein the terminal station having received the report of the use permission has notified the occurrence of the call, and Connecting a specific channel of a transmission line. A channel allocation method for a multiplex communication system, comprising: 4. The terminal station secures a specific channel of a multi-way multiplex communication transmission path from the transmission path and reports the specific channel to the base station; and the terminal station reports the specific channel reported by the base station to the terminal station. 4. The method according to claim 3, further comprising: notifying the terminal station of the specific channel that can be used when making a call.