JPH0716265B2 - Circuit allocation system Switching system by subscriber line - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a switching system using a line allocation type subscriber line, and particularly to a time division multiple access system for subscriber lines in a switching system of an integrated service digital network (ISDN). TDMA, which is a combination of the TDMA method) and the line allocation method (DA method) that assigns a specific line from the group of lines that are commonly pooled each time a call occurs as a wireless line control method.
-It relates to a system configuration method when a wireless communication system such as a satellite communication system based on the DA system is applied.

[Conventional technology]

When the wireless communication system is applied to the subscriber line, and the satellite communication system is taken as an example, conventionally, various devices are arranged as shown in FIG. 1 is a home device, 2 is a network terminating device, 13
Reference numeral 0 is subscriber earth station devices, 4 is a satellite, 150 is a base station radio system device, 160 is a base station exchange system device, and 6 is an existing repeater exchange in a terrestrial communication network. Note that 134 and 151 are wireless transceivers for satellite communication. The interface condition between the in-home device 1 and the network terminating device 2 is specified by the ISDN user network interface. In this configuration, the subscriber line of the wireless system by the TDMA-DA system is set to the exchange of the base station switching system device 160 every time one in-home device calls, but in ISDN, the D channel for signal is used. It is necessary to set a plurality of B channels for information and a layer 1 control line for controlling start / stop of layer 1 from the exchange side. In the following description, it is assumed that the D channel and the layer 1 control line are set in the same section at the same time, and therefore two channels are set for each line setting (one or two lines depending on the implementation method). Further, since the exchange of the base station switching system equipment 160 identifies each of the two network termination equipments from the accommodation position of the 161 subscriber line signaling equipment corresponding to each other one by one, the specific two network termination equipments are identified. Of 161
It is necessary to control the path connection so as to properly connect to the subscriber line signaling device. From the subscriber line signaling device 161, the B channel is connected to 162 channel switches, and the D channel and layer 1 control line are connected to 164 control devices. FIG. 7 is a diagram for explaining the control sequence of this device, and supplements the following explanation of the operation.

When the in-home device 1 of the ISDN user network interface (basic interface) makes a call (transmits an INFO signal), the network terminating device 2 detects the activation of layer 1 and extracts the layer 1 from the in-station interface device 131. The information of the control line is monitored by 132 monitoring devices and notified to 135 control devices.
Next, the control device 135 contacts the base station control device 153 through the DA control line 141, and the base station control device 153 allocates 142 as the radio channel for the D channel and the layer 1 control line. The switch is closed so that it can be connected to the subscriber line signal device 161, and control information is sent to the control device 135 via the DA control line 141.
Close the switch so that it can be connected to 132. As a result, the activation of layer 1 is notified to the control device 164 and the subscriber line signaling device 161 is activated. Subsequently, a layer 2 control signal is exchanged between the in-home device 1 and the subscriber line signaling device 161, to establish a layer 2, and a layer 3 is established between the in-home device 1 and the control device 164.
Enables sending and receiving signals. Next, the home device 1 sends a call setting signal to the control device 164, and the control device 164 analyzes this and requests the base station control device 153 to set the channel for the B channel through the control line 165. 153 assigns the wireless line 143 and sets the wireless line 143 under the same control as the line setting control of the wireless line 142. When the base station control device 153 notifies the control device 164 of the completion of the line setting via the control line 165, the control device 164 selects the line of the relay connection signaling device 163 in order to connect with the relay exchange 6 of the terrestrial network. The B channel from the subscriber line signal device 161 is connected to the relay connection signal device 163 by closing the communication path switch of the above, and the address signal for the relay connection is sent from the control device 164 to the relay exchange 6. The method described above has an advantage that a wireless channel can be efficiently used because a signal channel and a communication channel are allocated for each call.

[Problems to be Solved by the Invention]

The above-mentioned conventional exchange system has the following drawbacks.

Since the D channel wireless line is allocated for each call and then the B channel wireless line is allocated, the connection delay time becomes large. Also, if the wireless channel is insufficient and the channel for the D channel cannot be assigned, the call processing cannot be performed.

Since the number of 161 subscriber line signaling devices (subscriber accommodation terminals) required for the exchange of the base station switching system device 160 needs to be equal to the number of network terminating devices of 2, wireless line devices are simultaneously used in the wireless section. The number of subscriber line signaling equipment 161 of the exchange cannot be limited even if the number of equipment is limited to the number of in-home equipment.If there are many subscriber earth stations under the control of the wireless base station, 160 In some cases, the size of the central office switching system becomes large, resulting in a redundant configuration.

Although the switch of the TDMA device 152 for allocating the line and the call path switch of the switch 162 are the same type of device, the switch 161 has the subscriber line signaling device and the call path switch 162.
However, the TDMA device 152 and the communication path switch 162 cannot be integrated because they have to be placed in front, and the device configuration becomes redundant.
Further, it is redundant to separately install the control devices of the base station control devices 153 and 164 for the wireless system device and the exchange.

The wireless device and the exchange are connected by a dedicated control line of 165 to send and receive control signals, but the selection control of the communication path becomes complicated and causes performance deterioration.

In satellite communication, long-distance wireless communication is possible in a wide area, so subscriber earth stations can be scattered throughout the country, but when communicating with premises equipment of the terrestrial network, the base station is used because it goes through the base station. If it is in a remote place, the distance of the ground line becomes long and it is redundant. Even if multiple base stations are installed, the base station corresponding to the subscriber's earth station is fixed.Therefore, in order to replace the base station for each call, prepare a wireless line group for the base station. Each time a call is made, it is necessary for the caller to switch to the line group of the base station that he wants to use.

The object of the present invention is the drawbacks of the prior art (a large delay time, there may be a shortage of lines for signal channels, the size of the exchange is redundant, the configuration of the communication path switch is redundant, DA control of exchange wireless communication. However, the TDMA-DA wireless system is applied to the subscriber line.
It is to provide a method of simply configuring a switching system for ISDN. It should be noted that the present invention applies wireless communication to a subscriber line for connecting an individual home device to an exchange, and since its traffic volume is extremely small compared to an interoffice line, it is always set in parallel. It also includes a method of sharing the DA control line with the D channel.

[Means for Solving the Problems]

In order to achieve the above object, the present invention uses wireless communication by time division multiple access for subscriber line transmission means that connects an exchange and a plurality of home devices, and is commonly used every time a call is generated as a wireless line control method. The DA method, which is a circuit allocation method that allocates a specific circuit from the pooled circuit group and sets the circuit, is applied, and the common channel type subscriber line signaling method typified by ISDN interface is applied to control the switching operation. In the switching system, an intra-station interface device is arranged between the network terminating device and the in-home device side time division multiple access device in order to connect the network terminating device to the in-home device side time division multiple access device. The B channel for information, the DA channel for signals, and the Layer 1 control line for controlling Layer 1 at the user network interface point are separated and drawn out. Is connected to a time division multiple access system wherein the home device side, the D channel and Layer 1 control line is the
Connect to the control device installed on the base station side by using multiplex or existing permanent line to control the DA system, and make a series of subscriptions corresponding to all intra-station interface devices under the control of the base station. By assigning a person accommodating position number, exchange control is performed as an integrated system including the time division multiple access wireless line by the DA method.

The wireless communication system of the exchange system uses the time division multiple access satellite circuit communication system based on the DA system, and divides the TDMA device on the base station side into a plurality of remote locations to separate points from the existing terrestrial communication network. By connecting by, when the in-home device in the existing terrestrial communication network and the in-home device of the subscriber earth station perform satellite communication, the nearest base station is automatically selected and connected to minimize the communication distance of the terrestrial communication network. It is also effective to control the communication system according to the above and configure the communication system with one wireless line group common to the base stations.

[Action]

According to the present invention, the in-office interface device is placed in front of the TDMA device on the in-home device side, and the D channel and the layer 1 control line drawn from the in-station interface device are multiplexed to the DA control line or the base line is provided by a permanent attached line. It is connected to the control device of the station, and the devices of multiple subscriber earth stations and base stations to be installed for multiple subscribers are integrated into one and the whole system is configured as one switching system (that is, TDMA on the in-home device side). The most important feature is that the subscriber accommodation position of the exchange and the relay line accommodation position of the terrestrial communication network on the base station side TDMA device are defined corresponding to the intra-station interface device connected to the device, and are centrally managed). And As a result, the communication path switch and the TDMA switch of the exchange, which were separately installed and controlled in two stages in the conventional technology, are integrated in the same device.
Logically, it can be integrated into one-step switch control. This facilitates control of line connection. In addition, as described in the third embodiment of the present invention, a function of transmitting and receiving control information between the parent base station having a control function of the entire system by dividing the communication path switch of the base station into a plurality of parts and the communication path portion and the parent base station. By remotely arranging multiple child base stations with each other and connecting each child base station to the nearest terrestrial network switching station, it is possible to communicate from the subscriber earth station to the parent or child base stations in each area via satellite lines. Therefore, by automatically selecting the base station, the effect of minimizing the communication distance of the terrestrial communication network can be obtained.

Embodiments will be described below with reference to the drawings.

〔Example〕

Example 1 and Example 2 described below are basic aspects of the invention, and Example 3 is one more aspect.

Embodiment 1 FIG. 1 is a diagram for explaining a first embodiment of the present invention,
1 is a home device having an I interface, 2 is a network terminating device, 230 is a subscriber earth station device, 4 is a communication satellite, 250 is a base station device, 6 is an ISDN existing repeater exchange, and is a subscriber line. The satellite communication system is applied for transmission. The blocks of the subscriber earth station devices 230 and the base station devices 250 are the main part of the invention, and the transit exchange 6 is for explaining the connection with the terrestrial network. 231 and 237 are internal interface devices, 232
Reference numerals 238 and 238 are subscriber line signaling devices for accommodating the D channels, and are an intra-office interface device 231 and a subscriber line signaling device 232.
ISDN basic interface, in-station interface device 23
The 7 and subscriber line signaling device 238 accommodates the primary group interface. 233 and 252 are TDMA switch units, and 234 and 251 are TDMA units.
The device is a wireless line control function unit and wireless transmission / reception devices. A control device 235 is a D channel signal of the subscriber line signal devices 232 and 238, layer 1 control information of the intra-office interface devices 231 and 237, and a connection release command for the switch of the TDMA device switch unit 233 to be an existing DA control device of 241. Satellite and 236
And 254 through the data communication control device, there is a function to bidirectionally transfer data to and from the control device of 255. For example, as will be described below again, the D channel information of the subscriber signaling device 232 is the data defined by the format of the ISDN user network interface layer 2 with the device identification number of the in-office interface device 231 added. The transmission procedure for the satellite line, which is specified for DA control, is transferred.

Next, the operation of this device will be described below by taking as an example the case where the home device 1 makes a call according to the procedure specified by the ISDN user network interface (basic interface). The signal sequence is shown in FIG. 2 for reference. When the in-home device 1 makes a call (transmits an INFO signal), the network terminating device 2 sends a layer 1
Of the start of the internal interface device 231 is notified to the control device 235 through the layer 1 control line extracted from the intra-station line termination device of the intra-office interface device 231, and the control device 235 notifies the control device 255.
The control device 255 activates 232 subscriber line signaling devices via the control device 235 to enable transmission and reception of layer 2 control signals. Next, when the network terminating device 2 notifies the establishment of the synchronization of the layer 1 (receives the INFO signal), the in-home device 1 transmits the layer 2
When it is notified to the subscriber line signaling device 232 via the D channel drawn from the intra-office interface device of 231, the control signal (SABME) for establishing the Further, when the control device 235 notifies the control device 255, the control device 255 sets the condition for establishing the layer 2, and controls the layer 2 from the subscriber line signaling device 232 to the home device 1 via the control device 235. Notify by signal (UA signal). As a result, the home device 1 and the control device 23
It becomes possible to transmit and receive signals by the layer 2 format between 5 and the accommodating position number of the in-station interface device 231 excluding the flag pattern at the beginning and the end of the layer 2 format in the control device 235 and the FCS code for error control. Is sent to the data communication control device for satellite communication 236 as data and is transferred to the data communication control device 254 by the transmission control procedure of satellite communication and passed to the control device 255. The control unit 255 extracts the ISDN layer 3 format from the data and executes the control specified by the layer 3. That is, when the call setting signal including the called party number or the like is transmitted from the home device 1, the call setting signal is passed to the control device 255, and the control device 255 analyzes the called number or the like included in the call setting signal to control the DA system. Allocate 242 satellite lines for the incoming B channel, and
Path connection information is sent to the switches of the DMA device switch sections 233 and 252 to connect the intra-station interface device 231, the satellite line 242, and the satellite line 242 and the relay connection signal device 253. Here, the means for sending the path connection information from the control device 255 to the TDMA device switch unit 233 is provided by the satellite line 241 as described above. In addition, the control device 255 to connect to the ground line
Sends an address signal to the relay connection signaling device 253 and extends the B channel to the relay exchange 6 to connect to the terrestrial network (CCITT No. 7 signaling can be applied as an example of this procedure).

The same applies when an incoming call is made from the repeater exchange 6 to the in-home device 1, and is as follows. When an address signal arrives from the repeater exchange 6 to the control device 255 via the relay connection signaling device 253 using, for example, the CCITT No. 7 signaling system, the control device 255 sends a layer 1 start instruction via the data communication control device 254 to the data communication control device. The control device 235 is notified by the transmission control procedure of 254, and when the layer 1 between the in-home device 1 and the network terminating device 2 is activated by using the layer 1 control line of the in-office interface device 231, the control device 235 receives the report. . Next, the control device 255 sends a control signal (SABME) for instructing the subscriber line signaling device 232 via the control device 235 to the home device 1 via the D channel, and the home device 1 sends the control signal. When the establishment of layer 2 is notified (UA signal), the control device 23
Receive a report from 5. The control device 255 sets 242 satellite lines by DA control, edits the call setting signal of the ISDN layer 3 in the home device 1 and sends it to the home device 1. Subsequent layer 3 control such as callee response and communication termination is also executed between the in-home device 1 and the control device 255 in the same manner as described above according to the definition of the ISDN user network interface. For example, when the subscriber line is released from the network side, the control device 255 disconnects the layer 3 and transmits and receives a release signal to the in-home device 1, and then releases the layer 2 to the subscriber line signal device 232 and the layer 1 Is instructed to the in-office interface device 231 to perform the restoration.

Next, a case will be described in which 11 in-home devices make a call according to the definition of the primary group interface. According to the provision of the user network interface, it is premised that the layer 1 is always activated between the network terminating devices for the primary groups of the home devices 11 and 21, so that by connecting the home device 11 to the network terminating device 21, the layer 1 It is in operation.
The state information (in operation, failure, etc.) of Layer 1 on the Layer 1 control line drawn from the interface device for primary group of 237 is notified to the control device 235, and if it is in operation, the primary information of 238 The group subscriber line signaling device is activated. When the in-home device 11 makes a call, the layer 2 is established by exchanging control signals of the layer 2 in the same manner as the basic interface according to the definition of the interface for the primary group. Next, the in-home device 11 notifies the control device 255 by adding the incoming call number and the number of B channels required for communication to the layer 3 call setup signal.
Upon receiving this, the 55 allocates a line equivalent to the satellite line 242 for the required number of B channels, and the TDMA device switch unit 233.
And 252, the relay connection signal device 253 is activated, and the relay exchange 6 is connected.
A device for controlling a layer 3 signal for an incoming call to the home device 11 or the like
It is analyzed by 255 and realized by similarly controlling the devices of each part.

As described above, 232 subscriber line signaling devices are placed in the block of the subscriber earth station devices 230, and the satellite line 241 line is connected.
By sharing DA control, D channel information transfer, and layer 1 control lines, the signal line for D channel can be used at all times without setting for each call, so connection delay time is shortened compared to the conventional method. , D channels can be secured at all times. Further, the switch of the TDMA device switch unit 252 has a wireless section on the left and a ground line on the right in the figure.
Since it is possible to serve also as the operation of the exchange by selecting and connecting each vacant line for each call, the TDMA device switch unit 252 can also serve as the communication path switch which is required in the prior art. Further, the accommodation position of this system is defined by giving a serial number to the intra-office interface device 231, and the switch of the TDMA device switch unit 252 has only to have a size capable of accommodating a wireless line as a communication path. When the wireless line is set in accordance with the traffic amount of the intra-station interface device 231, the switch of the TDMA device switch unit 252 can be appropriately configured in accordance with the traffic amount without waste due to the wireless effect. Further, since separate switches are not provided for exchange and wireless, the path matching process between the switches, which is a problem in the conventional technique, becomes unnecessary.

In ISDN, packet communication is defined by layer 3 using the D channel, and in the first embodiment, 255 control devices are provided with a communication function for connecting to the packet communication network to connect to the packet communication network. Packet communication from the home device 1 becomes possible. In this case, it is necessary to secure the line capacity of the satellite line 241, but since it is applied to the subscriber line, the network terminating device 2 accommodated in the subscriber earth station devices 230 has one or several lines. If so, satellite line 241 is 1
You can do it on the line. When the traffic of the packet is large, the configuration of the second embodiment described below is desirable.

As is clear from the above, all the drawbacks of the prior art could be eliminated by this method.

A plurality of base stations will be described in Example 3 below.

Embodiment 2: FIG. 3 is a diagram for explaining the second embodiment of the present invention.
Is a home device having an I interface, 2 is a network terminating device, 330 is a subscriber earth station device, 4 is a communication satellite, 350 is a base station device, 6 is an ISDN existing repeater exchange, and 333 and 351 are satellite communications. Wireless transmission / reception devices. 341 is a permanent line for transferring information for DA control. 342
Is a permanent line for extending the D channel and the layer 1 control line drawn from the in-office interface device 331 to the control line separating device 354 that separates the layer 1 control line and the D channel. Separated (control line separation device 354 if two lines are set separately)
D channel is a 355 subscriber line signaling device,
Layer 1 control lines connect to the 356 controller. FIG. 4 shows the control sequence.

When the in-home device 1 performs a calling operation with this device, it is detected by the network terminating device 2 in the same manner as in FIG. 1, and the in-office interface device 331 notifies the control device 356 of layer 1 activation through the layer 1 control line. Starts the subscriber line signaling device 355 and activates Layer 2
When it is in the operating state that enables transmission and reception of signals,
It is possible to exchange layer 2 control signals (SABME, UA) between the in-home device 1 and the subscriber line signaling device 355 to establish layer 2, and to transmit and receive a layer 3 signal between the in-home device 1 and the control device 356. Become. Next, the calling signal of layer 3 is sent from the home device 1.
When it is transferred to the control device of 356, the control device 356 identifies that it is a signal from the home device 1 from the accommodation position of the subscriber line signal device 355, analyzes the called number included in the calling information, and analyzes the B channel. The satellite connection circuit 343 is allocated for use in transmitting the path connection information to the switches of the TDMA device switch sections 332 and 352, and the intra-station interface device 331 and the satellite circuit 343 and the satellite circuit 343 and the relay connection signal device 353 are connected. Control device
The line of satellite line 341 and the control unit of 334 are used to send path connection information from 356 to TDMA device switch 332. Further, in order to connect to the terrestrial line, the relay connection signaling device 353 is activated to notify the call to the transit exchange 6 and connect the B channel to the terrestrial network. Hereinafter, the effect of the invention is the same as that of the first embodiment except that the satellite line 342 is required.
There is a feature that the configuration of the subscriber earth station devices 330 can be simplified.

Third Embodiment: FIG. 5 is a diagram for explaining a third embodiment of the present invention. This is a modification of the first embodiment, and the switch of the TDMA device switch unit 252 of the first embodiment is divided into 552 and 553. The block numbers are combined with those in FIG. 1 of the first embodiment. The new number 7 is a relay exchange of the terrestrial network and is located at a remote place from the relay exchange 6. 8 is a home device in which the nearest base station is the base station devices 250, 9 is a home device in which the nearest base station is the base station devices 550, 600 is an existing ground network, 90 is the home device 9, 8
Reference numeral 0 indicates a subscriber line exchange of the in-home device 8. In addition,
The base station devices 250 are new base stations, the base station devices 550 are slave base stations, and the control device of 255 and the control device of 555 are connected by the data communication line of 557, and the control device 255 to the TDMA device switch unit 553. Connection control information to the ground network relay switch 7
The call control signal for relay connection to this data communication line
Transfer through 557. Further, the control device 255 has a route selection table and has a function of selecting the outgoing route to the relay exchange 6 or the terrestrial network relay exchange 7 from the incoming telephone number dialed by the in-home device 1 at the time of calling.

Now, when the home device 1 makes a call, the procedure proceeds as described with reference to FIG. 1, and the control device 255 refers to the route selection table at the stage where the path selection is performed from the destination number. If the telephone numbers of the devices 550 and the home device 8 are selected, the base station device 250 is selected as the base station and the path is set. When the base station devices 550 are used as base stations, control signals are transferred to the control device 555 through the data communication line 557. Thereafter, a call control signal for relay connection is sent to the relay exchange 6 or the terrestrial network relay exchange 7 to perform the relay connection according to the existing procedure. When an incoming call is received from the in-home device 9 to the in-home device 1, first, a terrestrial network routing method for receiving an incoming call from the in-home device 9 through the terrestrial repeater exchange 7 to the base station devices 550 is required. There is a way. As a method 1, when the subscriber number possessed by the base station devices 550 is given to the home device 1 and the home device 9 originates a call, this number is dialed. As method 2, similarly, the subscriber number (a) of the base station devices 550 is given to the home device 1, but at the same time, a special telephone number (succeeding a toll number that is not currently used, followed by a serial number ( In case of dialing from the in-home device 9, the special telephone number (b) is used to convert into the subscriber number of (a) in the existing terrestrial network to proceed with the relay connection. The method 1 has a drawback that the number of the in-home device 1 changes depending on whether the in-home device 8 makes a call to the in-home device 1 or the in-home device 9 makes a call to the in-home device 1. However, the method 2 has a number conversion table according to the place of origin. By preparing, there is an advantage that you can use the number (b) common throughout the country. Now, when the train of the terrestrial line reaches from the in-home device 9 to the terrestrial network repeater exchange 7, the address signal is transmitted from the terrestrial network repeater exchange 7 to the relay connection signal device 556.
Since it is notified to the control device 555 via the control device 555, the address signal is transferred to the control device 255 by the control device 555. Since the control device 255 receives a call with a different number (a) depending on the place of origin,
After identifying that this is the home device 1 by referring to the data registered in advance, the incoming call process is performed from the control device 255 to the home device 1 as described in the first embodiment.

As described above, by arranging multiple child base stations remotely and connecting to existing ground networks at multiple points, it is possible to automatically connect the in-home equipment of the ground network to the nearest base station, thus minimizing the line distance of the ground network. The effect that can be done occurs. Moreover, since there is only one wireless line group used in the DA system, there is no waste, and the caller of the subscriber earth station does not need to select the line group for the DA system of the base station. Further, in the case of making a call from the existing terrestrial network, Method 2 allows the caller to perform the call without being aware of the selection of the base station.

〔The invention's effect〕

As explained above, the TDMA-
In front of the DA radio equipment, pull the D channel into the subscriber line signal equipment of the base station by superimposing it on the DA control line,
Furthermore, since the subscriber accommodation position is defined corresponding to the interface device in the station, and the entire system is configured as one switching system, it is possible to easily control the line setting and improve the performance and to improve the performance of the wireless system. The TDMA switch and control unit can be integrated with the switching channel switch and control unit to reduce system components, and the size of the base station channel switch can be set by the traffic volume instead of the number of subscribers. , D channel is always available, so call control will not be hindered. Furthermore, it is possible to install multiple base stations separately,
When this feature is applied to satellite communication, it is possible to set multiple connection points with the ground network and automatically select the base station that can minimize the communication distance of the ground network. Moreover, each base station has a separate line group. Can be achieved with a single line group common to each base station without switching the line groups.

The application fields of the present invention are as follows.

By replacing the satellite line of the first embodiment with a terrestrial radio line, the operation principle can be made common to the application to the subscriber radio system by the TDMA-DA system and the application to mobile communication using the TDMA-DA system. It is possible.

The connection interface with the terrestrial network of the first embodiment shows the inter-office interface with the transit exchange.
It is also possible to connect to the subscriber line again to the user network interface.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention, and FIG. 2 is a first embodiment.
3 is a block diagram of the second embodiment of the present invention, FIG. 4 is a control sequence of the second embodiment, FIG. 5 is a block diagram of the third embodiment of the present invention, and FIG. FIG. 7 is a sequence diagram of a conventional technique. 1,11,8,9 ... In-home equipment, 2,21 ... Network terminating equipment, 4 ... Communication satellite, 6,7 ... Replacing switch, 130 ... Subscribing earth station equipment, 150 ... Base station radio system equipment, 160 ... Base station Exchange system equipment, 131, 231, 33
1, 237 ... Intra-station interface device, 132 ... Monitoring device, 1
33,152 ... TDMA device, 134,151 ... Wireless transceiver, 135,153,1
64,235,255,334,356,555 ... Control device, 141,142,143,241,
242,341,342,343 ... Satellite line, 230,330 ... Subscriber earth station equipment, 232,238,355 ... Subscriber line signaling equipment, 234,251,333,3
51 ... Radio station transceiver, 233,252,332,352,552,553 ... TDM
A equipment switch part, 250,350,550 ... Base station equipment, 163,25
3,353,554,556 ... Signal device for relay connection, 254 ... Data communication control device

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location H04Q 7/26 7/30

Claims (2)

[Claims] 1. A wireless communication system using time division multiple access is used as subscriber line transmission means for connecting an exchange and a plurality of home devices, and
As the wireless line control method, the DA method, which is a line allocation method that allocates a specific line from a group of lines that are commonly pooled each time a call occurs and sets the line, is also applied to control the switching operation. In a switching system applying the common channel type subscriber line signaling system typified by the above, in order to connect the network terminating equipment to the time division multiple access equipment on the home side, the network terminating equipment and the time division multiple access equipment on the home side In-station interface device is arranged in, and the in-station interface device separates and draws out the B channel for information, the D channel for signal, and the layer 1 control line for controlling layer 1 at the user network interface point, The B channel is connected to the in-home device side time division multiple access device, and the D channel and layer 1 control line are multiplexed on an existing line for controlling the DA system. Or, by connecting to the control device installed on the base station side using an attached permanent line, by assigning a series of subscriber accommodation position numbers corresponding to all in-station interface devices under the base station, The above
A switching system based on a subscriber line, which is characterized by performing switching control as an integrated system including a time division multiple access wireless line based on the DA method. 2. The wireless communication system of the exchange system is the
By using the time division multiple access satellite circuit communication system by the DA system, the TDMA device on the base station side is divided into multiple parts and remotely located to connect to the existing terrestrial communication network at different points, thereby When the in-home device inside and the in-home device of the subscriber earth station perform satellite communication, the nearest base station is automatically selected and connected to control the communication distance of the terrestrial communication network to the shortest, and the communication system is common to the base station. 2. A switching system by a subscriber line of a line allocation system according to claim 1, wherein said switching system comprises one wireless line group.