JP2632550B2 - ISDN subscriber wireless communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a user terminal apparatus and a subscriber line exchange in an integrated services digital network (hereinafter referred to as ISDN) for providing a standard user network interface. The present invention relates to a subscriber communication system using a wireless line as a subscriber transmission path.

[Conventional technology]

An ISDN communication network providing an internationally defined standard user / network interface has been constructed. In this ISDN communication network, there is a method in which a wireless line is used as a subscriber transmission path between a subscriber line exchange that provides a service to a user and a terminal device of the user who receives the service. The communication method using the wireless line is such that a plurality of terminal devices can be connected and a user station device having a built-in wireless device and a base station device facing the user station device and connected to a subscriber line exchange. Is constituted by a wireless line. Conventionally, as this wireless communication system, a demand assignment type subscriber wireless communication system in which a wireless line is shared by each user station device and a wireless line that is not being used for a necessary user station device is allocated has been adopted.

[Problems to be solved by the invention]

In this conventional demand-assigned subscriber wireless communication system, a user station device installed on the user side terminates a user-network interface with a terminal device. And control of setting or canceling of the wireless line. Also, in the base station apparatus, the call control signal is terminated at the subscriber transmission line interface with the subscriber exchange, and the call from the subscriber line exchange is received at this termination point.
The end of the call was detected, and the setting of the wireless line was set or canceled. Further, within a wireless line between a user station apparatus and a base station apparatus, connection control is performed using a procedure unique to a wireless system.

For this reason, in the user station device, a user station composed of Layer 1, Layer 2, and Layer 3 defined by the ISDN protocol is used.
Since a function for processing all network interfaces is required, the user station device has a complicated configuration, and it has been difficult to realize an economical user station device.

SUMMARY OF THE INVENTION The present invention solves the above-described problems. A wireless line is configured by a user station device that does not require a processing function of layer 2 or more defined by the ISDN protocol. It is an object of the present invention to provide an economical ISDN subscriber wireless communication system that does not significantly change existing subscriber line exchanges configured to be connected.

[Means for solving the problem]

The present invention provides at least one user station device having a subscriber transmission line connecting a terminal device and a subscriber line exchange connected to one or more terminal devices, and a base station connected to the subscriber exchange and facing the user station device. In the ISDN subscriber wireless communication system configured with a wireless line between the base station device and a target user station device and a base station device in response to a call request, Means for detecting, in the user station apparatus, a start or stop signal of layer 1 defined by the user / network interface of the terminal apparatus, and means for requesting allocation or release of a communication radio line based on the detection signal of the means; With
A means for detecting a start signal or a stop signal of layer 1 defined by the subscriber line exchange interface from the subscriber line exchange; and a detection output of the means or a request from the user station apparatus. Means for performing assignment setting or release control of a communication wireless line with the user station device.

[Action]

The present invention relates to a case where a wireless line is configured as a subscriber transmission path of an ISDN communication network between a user station apparatus connected to a terminal apparatus and a base station apparatus connected to a subscriber line exchange.

In the present invention, the user station device and the base station device
A function of detecting a start signal or a stop signal of the layer 1 of the DN is provided, and by detecting the start signal or the stop signal of the layer 1, the setting release control of the radio line between the opposing user station device or the base station device is provided. I do.

For this reason, it is not necessary to provide the user station device with a function of processing Layer 2 and Layer 3 defined by ISDN.
It is possible to build an economic system.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings. First
FIG. 1 is a diagram showing an outline of a system configuration of an ISDN subscriber wireless communication system according to an embodiment of the present invention. Although FIG. 1 illustrates an example in which one terminal device is connected to a user station device and one user station device faces the base station device, for simplicity of description, Generally, according to ISDN communication network rules, a plurality of terminal devices are connected to a user station device,
A plurality of user station devices face the base station device.

In order to receive the service of the ISDN communication network to be connected, the terminal device 1 has a layer 1 (first layer) function unit 11, a layer 2 (second layer) function unit 12, and a layer 3 ( It has a (third layer) function unit 13 and is connected to the user station device 2 at a user / network interface definition point 3 defined by ISDN.

The user station device 2 includes a layer 1 processing unit 21 to which the terminal device 1 is directly connected and which provides the terminal device 1 with a layer 1 function on the network side of the user / network interface.
The wireless communication apparatus includes a wireless device 22 that transmits data from the terminal device 1 processed by the device 21 to the base station device 5 and a wireless channel control unit 23 that controls the wireless channel 4 with the base station device 5. Radio line control unit
23 is connected to the layer 1 processing unit 21, and the wireless channel control unit 23 is connected via the wireless device 22 to the wireless channel control unit 53 of the opposite base station device 5.

The user station device 2 and the base station device 5 are connected by a wireless line 4 by respective wireless devices 22 and 51. The wireless line 4 includes a plurality of communication wireless lines (wireless channels) 41 and one or a plurality of control wireless lines (wireless channels) 42. This wireless line for communication
41 is used for transmitting and receiving data transmitted between the terminal device 1 and the subscriber line switch 6, but is not always set between the user station device 2 and the base station device 5. Instead, it is set by the connection control between the radio channel management control unit 53 of the base station device 5 and the radio channel control unit 23 of the user station device 2 as needed. The control wireless line 42 is used for performing control such as setting control of the communication wireless line 41.

The base station device 5 is a wireless device facing the user station device 2.
51, a layer 1 processing unit 52, and a wireless channel management control unit 53. The wireless device 51 is connected to the user station device 2 via the wireless line 4 and sends data from the user station device 2 to the layer 1 processing unit 52 and the wireless line management control unit 53.
The data from the layer 1 processing unit 52 and the wireless line management control unit 53 are sent to the user station device 2. The base station device 5 and the subscriber line switch 6 are connected by a subscriber transmission line interface 7, and the layer 1 processing unit 52 of the base station device 5 transmits data from the terminal device 1 through the subscriber transmission line interface 7. It has the function of converting it into a specified signal. Further, the wireless line management control unit 53 performs management control of the communication wireless line 41 and the control wireless line.

The subscriber line switch 6 includes a subscriber line interface 7
And a layer 2 processing unit 62 for processing layers 2 and 3 of the user / network interface, a layer 3 processing unit 63, and a communication path device 64. To the relay system 8.

Next, the operation of the communication system of this embodiment will be described with reference to FIG. 2 and FIG.

FIG. 2 is a sequence diagram showing a connection procedure triggered by a case where a call is made from the terminal device 1.

Now, assuming that a call is made on the terminal device 1, the layer 3 function unit 13 of the terminal device 1
The function unit 11 is started. Thereby, the layer 1 functional unit 11
A layer 1 start signal specified by the user / network interface is transmitted to the user station device 2. User station device 2
The layer 1 processing unit 21 of the terminal device 1
The activation signal detects the activation of the layer 1 of the terminal device 1 and notifies the wireless channel control unit 23 of the detection.

The detection of the layer 1 signal of the terminal device 1 in the layer 1 processing section 21 can be easily realized because the ISDN defines the layer 1 activation signal. When a plurality of terminal devices are connected to the user station device 2, the layer 1 processing unit 21 can operate in response to a layer 1 activation signal from any of the terminal devices. IS when conflict occurs
The start signal of one terminal device is selected by the contention control defined by the DN.

Based on the detection result of the layer 1 activation signal, the radio line control unit 23 of the user station device 2
42, Notify the wireless channel management control unit 53 of the base station device 5 of the activation of the layer 1 of the terminal device 1 via the wireless device 51 of the base station device 5. Upon receiving the layer 1 activation notification from the wireless channel control unit 23, the wireless channel management control unit 53 selects a vacant communication wireless channel 41 and uses the result as an assignment signal to send the wireless device 51 and control wireless channel 42 , Via the wireless device 22 to the wireless channel control unit 23 of the user station device 2,
The activation of the corresponding communication wireless line 41 of the wireless device 51 is controlled. Also, the activation of the layer 1 of the terminal device 1 is notified to the layer 1 processing unit 61 of the subscriber line exchange 6 by the subscriber transmission line interface 7.

Upon receiving the communication wireless line assignment signal from the wireless line management control unit 53, the wireless line control unit 23
In addition to controlling the activation of the communication wireless line 41 allocated to the communication device 22, the control unit 21 instructs the layer 1 processing unit 21 to complete the activation of the layer 1. Based on this, the layer 1 processing unit 21
A layer 1 activation completion signal is sent to the terminal device 1 to complete the activation sequence of the layer 1 of the user / network interface.

Through the above processing, it is possible to set the communication wireless line 41 each time the terminal device 1 makes a call. Also, in the case of an end call, the layer 1 function unit of the terminal device 1 is made in the same manner as the outgoing call
Layer 1 defined by user / network interface from 11
Since the stop signal is transmitted, the set communication wireless line 41 can be released by detecting the stop signal.

Next, the operation in the case of an incoming call to the terminal device 1 from the network side will be described with reference to the sequence diagram of FIG.

3 is different from the operation shown in FIG. 2 only in that the operation proceeds based on a layer 1 activation signal from the subscriber line exchange 6. Further, the detection of the layer 1 signal from the subscriber exchange 6 in the layer 1 processing section 52 can be easily realized by a signal standardized by the subscriber transmission line interface 7.

Even when a plurality of user station devices 2 are opposed to the base station device 5, a code for identifying the destination user station device is given to the radio channel control signal passing through the control radio channel 42. In addition, the control wireless line 42 can be shared by each user station device. Further, even when a plurality of terminal devices 1 are connected to one user station device 2, the start or stop control in layer 1 is performed by performing layer 1 start or stop control commonly to all connected terminal devices. It is possible.

Although the description of the present embodiment has been made with reference to the example of the fixed wireless line in which the user station apparatus and the base station apparatus face each other, it goes without saying that a satellite line and a mobile wireless line can be used as the wireless line.

〔The invention's effect〕

As described above, the present invention provides a user station device and a base station device with a layer 1 signal detection function, so that the user station device can set up and release a communication wireless channel without performing layer 2 or higher processing. Can be realized.

Therefore, the configuration of the user station device can be simplified, an economical user station device can be provided, and a system using a wireless line for the ISDN communication network can be economically constructed.

Further, it is possible to efficiently use a demand-assigned wireless line as a subscriber transmission line without modifying an existing subscriber line exchange configured to connect terminal devices via a wired transmission line. The effect is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a subscriber transmission line according to one embodiment of the present invention. FIG. 2 is a sequence diagram showing an example of a connection procedure triggered by a call from a terminal device of the embodiment. FIG. 3 is a sequence diagram showing an example of a connection procedure triggered by an incoming call from the network side in the embodiment. 1 ... terminal device, 2 ... user station device, 3 ... user
Network interface definition point, 4 ... wireless line, 5 ... base station device, 6 ... subscriber line switch, 7 ... subscriber transmission line interface, 8 ... relay system.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location H04Q 7/30

Claims (1)

(57) [Claims] A subscriber transmission line connecting a terminal device and a subscriber line exchange is connected to one or more terminal devices, and at least one user station device is connected to the subscriber line exchange and faces the user station device. In the ISDN subscriber wireless communication system, this wireless line is set up or released between the target user station device and the base station device in response to a call request. Means for detecting to the user station device a layer 1 start or stop signal defined by the user / network interface of the terminal device, and issues a request for allocation or release of a communication radio line based on the detection signal of the means. Means for detecting a start signal or a stop signal of Layer 1 defined by a subscriber line interface from the subscriber line exchange, and a detection of this means. Means for performing assignment setting or release control of a communication wireless line with the user station device in accordance with output / output or a request from the user station device.