JPH0771332B2 - Wide area mobile phone system - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mobile communication system, and more particularly to a communication system capable of providing wide area services with a simple configuration.

[Conventional technology]

FIG. 1 shows the configuration of an automobile telephone system as an example of a mobile communication system, in which 51 is a fixed telephone network and 52 is a fixed telephone network.
Is a common line signaling network, 53 is an automobile telephone exchange, 54 is a wireless line control device, 55 is a wireless base station, 56 is a mobile unit, 57 is a communication line, and 58 is a common line signal line.

As shown in the figure, in a mobile communication system such as a car telephone, a node for which a home memory is installed is always used for control so that a trace exchange can be easily performed even when a radio telephone moves between radio line controllers. Must be connected by a line.

On the other hand, a cordless telephone in which the rosette of the telephone is wirelessly replaced is a mobile communication system in which the telephone is wireless with a simple system configuration, but the movable range is limited to the vicinity of the rosette.

[Problems to be solved by the invention]

Among the conventional mobile communication systems as described above, the system adopting the former car telephone system complicates the configuration of the base station system that controls the control, while the latter system adopts the case of the latter cordless phone system. Has a problem that it is difficult to widen the service area because the movable range of the mobile device is limited to the vicinity of the rosette.

The present invention has been made in view of such conventional problems, and an object thereof is to provide a communication system capable of realizing a mobile communication system capable of providing wide-area services with a simple configuration.

[Means for solving problems]

According to the invention, the above mentioned objects are achieved by the means recited in the claims.

That is, according to the present invention, in a mobile communication system, when a wireless telephone moves between different call connection areas, the destination wireless channel control apparatus newly performs location registration in accordance with a request from the wireless telephone, and the wireless channel connecting apparatus. This location registration is used as an opportunity to allocate a telephone line for a call to the wireless telephone, and thereafter, the wireless telephone directly uses the fixed telephone network to the wireless line control device having the home memory of the wireless telephone. Remote file access is performed using the dial keys on the telephone, and by transferring the information necessary for guiding the incoming call to the destination such as the destination telephone number, the home of the wireless telephone can be used even in the call connection area of the destination. It enables a call connection equivalent to the call connection area under the wireless line control device in which a memory exists.

〔Example〕

FIG. 2 is a diagram showing the configuration of an embodiment of the present invention,
1 is a fixed telephone network, 2 is a wireless line controller in the home zone to which the wireless telephone 4 belongs, 3 and 13 are wireless connection devices, 5 and 15
Is a home memory, 6 and 16 are call connection areas, 7 and 17 are subscriber lines, 8 and 18 are file access subscriber lines, and 12 is a wireless line control device in the home zone to which the wireless telephone 14 belongs.

In FIG. 2, each wireless line control device 2, 12 has its own call connection area 6, 16 and a home memory 5 or 15 corresponding to each area. The wireless line control devices 2 and 12 are connected to the fixed telephone network 1 by subscriber lines 7 and 17. Call connection from the fixed telephone network 1 to the wireless telephone 4 is executed as follows.

The fixed telephone network subscriber makes a call to the telephone number of the subscriber line accommodating the radio network controller 2 (the telephone number of the radio telephone). That is, the telephone number of the subscriber line and the telephone number of the wireless telephone are associated with each other in advance in a one-to-one correspondence.

The wireless line control device 2 on the receiving side detects an incoming call to the subscriber line, searches the home memory 5 by the telephone number, and searches for the position information of the corresponding wireless telephone 4.

The wireless line control device 2 performs the incoming call operation using the wireless connection device 3 corresponding to the position information of the corresponding wireless telephone 4.

On the other hand, when a call is made from the wireless telephone 4 side, the wireless line control device 2 intervenes in the connection operation up to the sending of the dial signal to the fixed telephone network switch, and the subsequent call connection is based on the dial signal as in a normal telephone. Is performed as a process on the fixed telephone network side.

In addition to the basic connection operation described above, as a method that enables a call even when an arbitrary wireless telephone moves to an area under the control of a wireless line controller other than the wireless line controller having the home memory of the wireless phone, The following methods are possible.

That is, in order to enable movement of the wireless telephone (hereinafter referred to as roaming) across the wireless line control devices,
For example, when the wireless telephone 4 moves to the position of the wireless telephone 14, a. Location registration in the destination wireless network controller 12 b. Payout of the subscriber line 17 from the destination wireless network controller 12 c. Home wireless Three procedures are required to notify the line control device 2 of the transfer destination.

The method of performing this procedure is shown in FIGS.

FIG. 3 shows a control sequence for roaming registration, and mainly shows the operations relating to a and b, and FIG. 4 shows a roaming destination notification sequence to the home radio network controller, showing the operation relating to c. It represents.

The user of the wireless telephone 4 (hereinafter referred to as Rome) who has roamed to the area of the wireless line control device 12 in which his / her home memory does not exist is a wireless telephone which the wireless line control device 12 has not previously specified (in this case, the wireless roaming roaming device). It is necessary to receive the payout of the subscriber line 17 so that the subscriber line 17 prepared for telephone call of the telephone set 4) can be used during roaming (this procedure is called roaming registration).

This is the above procedure of a and b, and consists of the following two procedures. A description will be given based on FIG.

Rome manually performs a position registration operation on the wireless telephone 4. As a result, the wireless telephone 4 transmits the position registration request signal, and receives the response permission signal from the wireless connection device 13 which has received the position registration request signal, thereby selecting the connection destination wireless connection device 13 (this procedure is initialized). Called location registration). By this initial position registration, the roaming wireless telephone 4 can exchange signals with the wireless line control device 12 via the designated wireless connection device 13. At this time, if there are a plurality of wireless connection devices 13 that have received the location registration request signal, it is necessary to perform an operation such as selecting the wireless connection device 13 having the highest reception level in the wireless line control device 12, for example.

The user of the wireless telephone 4 performs the following operation in order to have one of the roaming subscriber lines 17 prepared in advance by the wireless line control device 12 be paid out. That is, a call for roaming registration is made to the wireless line control device 12 (this call needs to be operated by a special key in order to distinguish it from a call for communication). ).

Then dial the number of any roaming subscriber line from the dial keys. That is, Rome has a list of roaming subscriber line numbers in advance, and dials one of the numbers. If the dialed subscriber line is not a line issued by another roaming registration, the wireless line control device 12 permits use.

That is, the fact that the subscriber line is assigned to the Rome is temporarily registered in the memory in the control device 12. The permission is notified to Rome by, for example, a tone signal.

Also, if the dialed line is being issued, a tone (retry request tone) different from permission is notified. When Rome receives this retry request tone, he again dials another arbitrary roaming subscriber line number.

It goes without saying that the permission notification and the retry request may be digital signals instead of tones.

With the above operation, Rome can freely make a call at the roaming destination. However, as it is, since the incoming call to the Rome comes to the home wireless network controller, it is necessary to guide the roaming destination. This is the process of c, and the following operations are performed.

When the operation of b above is completed, a call is subsequently made to the subscriber line of the roaming contact line 8 of the home wireless line controller 2 (this is the same call as a normal call via the fixed telephone network). . When the home radio network controller 2 detects an incoming call from Rome on this subscriber line, it sends a tone for prompting a dial operation to identify the originating subscriber.

The calling Rome side dials this tone, the receiver's ID of the wireless telephone, and the subscriber line number issued at the roaming destination. In response to this, the control device 12 temporarily registers the fact in the home memory 5. By this operation, the wireless line control device 2 of the home memory can guide the incoming call to the roaming destination.

As the guidance method, it is possible to guide the roaming destination by a talkie, transfer the incoming call to the roaming destination radio network controller, and the like.

As an application example of the present invention, when the wireless line control device is housed in the PBX, a wide area mobile phone system is realized by housing the wireless line control device in each of the plurality of PBXs.

Further, by accommodating the wireless line control device in the fixed telephone network subscriber exchange, it is possible to develop it into a mobile communication service or a mobile phone service for a mobile body.

〔The invention's effect〕

The present invention is to extend the range of movement of a wireless telephone independently to a wireless connection area connected to a fixed telephone network in a mobile communication system in which an interface with the fixed telephone network is a general subscriber line.

At that time, without providing a specific control line between the wireless line control devices which are interface nodes with the fixed telephone network,
Moreover, it does not require modification of the fixed telephone network.

Therefore, by developing an existing technology such as a cordless telephone, it is possible to economically construct a wide area mobile communication system.

[Brief description of drawings]

FIG. 1 is a diagram showing the configuration of a car telephone system, FIG. 2 is a diagram showing the configuration of an embodiment of the present invention, FIG. 3 is a diagram showing a roaming registration control sequence, and FIG. 4 is a home wireless line. It is a figure which shows the roaming destination notification sequence to a control apparatus. 1 ... Fixed telephone network, 2 ... Wireless zone control device in home zone to which wireless telephone 4 belongs, 3, 13 ... Wireless connection device, 5,
15 …… Home memory, 6,16 …… Call connection area, 7,17…
… Subscriber line, 8,18 …… Subscriber line for file access, 12
... Wireless line controller in home zone to which wireless telephone 14 belongs

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshihiko Shibata 4-3-1 Tsunashima-higashi, Kohoku-ku, Yokohama-shi, Kanagawa Matsushita Communication Industrial Co., Ltd. (72) Mitsuo Sato 4 Tsunashima-higashi, Kohoku-ku, Yokohama-shi, Kanagawa 3-3-1 Matsushita Communication Industrial Co., Ltd. Examiner Toshiyuki Ikeda (56) References JP-A-59-133742 (JP, A)

Claims (1)

[Claims] 1. A wireless line control device for controlling a wireless line in a call connection area comprising one or more wireless zones and having a home memory for storing position information and the like of a wireless telephone is provided between a fixed telephone network and a wireless connection device. In a mobile communication system existing between the wireless communication devices, when a wireless telephone moves between different call connection areas, the destination wireless circuit control device newly performs location registration according to a request from the wireless communication device, This location registration is used as an opportunity to allocate a telephone line for a call to the wireless telephone, and then the wireless telephone directly uses the fixed telephone network to the wireless line control device having the home memory of the wireless telephone. Remote file access is performed using the dial keys of and the information necessary for guiding the incoming call to the destination such as the destination telephone number is transferred. Wide-area mobile phone system that.