JPH0722423B2 - Mobile wireless communication system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Industrial field of application" The present invention has a wireless connection device arranged in each wireless zone, a wireless telephone moves in a wireless connection area consisting of a plurality of wireless zones, and the wireless connection area is wirelessly connected. The present invention relates to mobile radio communication in which line control is performed by a radio line control device and communication is performed using radio.

“Prior Art” In a conventional mobile wireless communication system, there is a car phone as a system that provides a wireless network between a wireless terminal and a fixed telephone network and extends public telephone service to a wireless telephone. This mobile phone simultaneously calls incoming calls to wireless phones from a wireless base station in each wireless zone in a location registration area consisting of multiple wireless zones, and controls the wireless base stations from the response signals. The line control device determines which wireless zone the wireless telephone is in. However, advanced technology such as multi-station simultaneous transmission is required. Also, each time a call is made from the wireless telephone, a call is made. Since it is a method of determining the wireless zone, a complicated and large-scale wireless line control function is required, such as a large load on the wireless line control device. Further, it is necessary to determine the arrangement of wireless zones and the frequencies used in each wireless zone in consideration of interference between adjacent zones.

As described above, the price of the system is expensive because the car telephone uses the advanced wireless line control technology. In addition, there are many costs for installing the system. Therefore, for example, it is economically difficult to apply to a small-scale system having a service area such as an area (region) limited to public facilities in a building or city.

An object of the present invention is to greatly simplify the method of controlling a wireless line and to construct a mobile communication system economically even when applied to a small service area such as a building or a limited area. To provide a communication method.

[Means for Solving Problems] According to the present invention, a wireless line control device that controls wireless line control of a wireless control area including a plurality of wireless zones, and a wireless line control device connected to the wireless line control device by a wired line, The wireless connection device is arranged in each zone, and the wireless connection device is connected to the wireless connection device by a wireless line, and consists of wireless telephones that move within the wireless connection area, and the wireless line control device has a connection function with a fixed telephone network, It has a switching function between the fixed telephone network line for incoming and outgoing call connection and a wired line to the wireless connection device, and a subscriber memory required for the exchange process. The wireless line control device and each wireless connection The device and each wireless telephone have their own device identification code.When making a call, receiving a call, and controlling location registration, these identification codes are combined to identify each other. The wireless connection device has a position registration function, and by performing the position registration, the wireless telephone and the wireless line control device synchronously store the identification codes required for making and receiving calls in their respective memories, and The registered identification code determines the combination of a wireless connection device and a wireless telephone set that can access each other, and the connection control for calling and receiving calls is a one-to-one wireless connection for which a correspondence relationship has been established by the location registration. It is performed between the telephone and the wireless connection device.

As described above, according to the present invention, the wireless line control device performs only the exchange process at the time of making or receiving a call, the connection control in the wireless section is closed between the wireless connection device and the wireless telephone, and the position registration is performed by one wireless connection device. The wireless line control device has a subscriber memory (which stores the contents of the position registration) for exchange processing, and the wireless line control device obtains the position information of the wireless telephone by the position registration. There is no need to set a special line for control between the wireless connection and the wireless connection, and there is no need to decide the location of the wireless zone or the frequency used in the wireless zone when constructing the system. . Therefore, according to the method of the present invention, the scale and configuration of the wireless line control device are simplified and the construction at the time of system installation is easy as compared with the conventional technique.

[Embodiment] Device Configuration FIG. 1 shows a configuration example of a mobile radio communication system according to the present invention. The wireless line control device 11 is connected to a fixed telephone network 12 via a connection line 13, and further, a plurality of wireless connection devices 14 and a wired line.
Connected through 15. Each wireless connection device 14 is provided in each wireless zone 16, a wireless control area is configured by these wireless zones 16, and wireless line control of the wireless control area is performed by the wireless line control device 11. A wireless telephone 17 moving in the wireless control area is connected to a nearby wireless connection device 14 by a wireless line 18. Wireless line controller
The network between 11 and the plurality of wireless connection devices 14 is a star network centered on the wireless line control device 11. Further, this wire line 15 can use any transmission line, but if it is configured with the same line as a 2W general telephone subscriber line, for example,
The line laid for fixed telephones can be reused as is.
A method of transmitting in the voice band, for example, a tone signal or a model signal can be applied to the control signal transmission.

On the other hand, the wireless line between the wireless connection device 14 and the wireless telephone 17
In this example, a configuration based on multi-channel access control is applied to 18, for example, one control channel is shared by all the wireless connection devices 14 and the wireless telephones 17, and the communication channel is a plurality of channels. Each time a call is made, a free channel is selected and used. Channels for calls can be fixedly assigned to each wireless zone like car phones, but here, the wireless connection device 14 selects a calling channel that is not used in the surrounding wireless zones from all the calling channels. However, it is possible to apply a dynamic assignment type distributed control method that is used for each outgoing call and incoming call. The wireless connection device 14, like the connection device of a multi-channel type cordless telephone, needs to perform an empty channel search for periodically monitoring an idle call channel during standby.

The wireless line control device 11 is an interface node with the general fixed telephone network 12, and if the interface condition is a subscriber line interface, the wireless line control device 11 will be a subscriber line exchange or PBX (private branch exchange) of the fixed telephone network 12.
The subscriber line originating from is terminated as a connection line 13. Therefore, the wireless line control device 11 is connected to the connection line 13 and the wireless telephone.
Information corresponding to 17 is stored, and correspondence between the wireless telephone 17 and the wireless zone 16 (or the wireless connection device 14), that is, position information of the wireless telephone 17 is stored. These memories are stored in the subscriber memory. When an incoming call or an outgoing call is detected in accordance with a control sequence described later, the subscriber memory is referred to and an exchange process between the connection line (subscriber line) 13 and the wired line 15 to the wireless connection device 14 is performed. To do. Further, the position information of the wireless telephone 17 is initialized or updated based on a position registration request that arrives at the wireless line controller 11 from the wireless telephone 17 via the wireless connection device 14. Details of the specific method will be described later.

Next, the wireless connection devices 14 are arranged such that each wireless connection device constitutes one wireless zone 16. One of the roles of the wireless connection device 14 is an interface function between the wired line 15 from the wireless line control device 11 and the wireless line 18 with the wireless telephone 17, and as will be described later, call processing such as calling and receiving calls. Each control of the wireless line 18 and the wired line 15 and a call link are opened. Further, since the outgoing call and the incoming call are connected using the wireless connection device 14 registered by the location registration, the wireless connection device 14 tells the destination wireless phone 17 the identification code (so-called ID) of the wireless phone. ) Is called to generate the incoming call signal, or from the calling signal issued by the unspecified wireless telephone 17, the own wireless connection device is selected.
A call signal addressed to 14 is detected by reading the ID of the wireless connection device contained in this signal, and a response is returned.
A call path with an arbitrary wireless telephone 17 is opened according to the ID exchange method. These specific control procedures will be described in detail later.

Finally, the wireless telephone 17 transmits a call-out signal addressed to the wireless connection device 14 in accordance with the call-out request of the user, opens a call path necessary for a call, and receives an incoming call signal from the wireless connection device 14. The basic function is to respond to the call and establish the necessary communication path for incoming calls. In addition to this, it has functions necessary for location registration corresponding to two location registration methods described later.

Call control The call control sequence from the wireless telephone 17 is shown in FIG. First, when a user of the wireless telephone 17 performs a call operation, for example, an off-hook operation of the wireless telephone 17, a call signal is transmitted from the wireless telephone 17. This calling signal is sent out on a shared control channel for multi-channel access. The calling signal includes the identification code (ID: B) of the wireless connection device 14 acquired by position registration in advance, the identification signal (ID: C) of the own wireless telephone 17 indicating the originator, and other systems. The system identification code (this is
For example, the identification code of the radio network controller 11 may be used; ID:
A) and are included.

Next, when the wireless connection device 14 having the same identification code as the wireless connection device ID: B and the system ID: A in this calling signal receives this calling signal, a calling response signal is transmitted. Send to wireless phone 17. At this time, the code (channel designation) of the call channel used for the call is transmitted at the same time. In this way, control is performed in advance by checking the connection destination by collating the identification code (ID) stored in the sending and receiving sides, and when the other party is able to check, the transmission to any communication channel and the transfer to the receiving side at the same time. Composed by. Further, the wireless connection device 14 that has accepted the call in this manner sends a call signal including the ID: C of the wireless telephone to the upper wireless line control device 11, and the wireless line control device
At 11, the connection line 13 on the fixed telephone network 12 side is selected based on the signal emitted by the wireless connection device 14. The call connection from the wireless telephone 17 is made by the wireless line control device 11 as described above.
Call 13 side (close loop of station line) and complete. The user of the wireless telephone 17 may hear the dial tone from the fixed telephone network 12 and perform the dial operation.

Incoming Call Control Next, an incoming call control sequence for the wireless telephone 17 is shown in FIG. In this case, when a subscriber of the fixed telephone network 12 dials the dial number of the wireless telephone 17 which he / she wants to call, the connection line (subscriber line) 13 corresponding to the wireless telephone 17 is captured and the wireless line control device 11 is notified. Then, an incoming call using the incoming call signal (16 Hz signal) is made to the connection line 13 from the fixed telephone network 12 side. In the wireless line controller 11, this
When a 16 Hz signal is detected, the called wireless telephone (ID: C) is found from the subscriber memory from the number of the connection line 13 and the wireless memory 17 determines in which wireless zone the wireless telephone 17 is registered. Then, the incoming call signal including the ID: C is sent to the wireless connection device (ID: B) in the wireless zone. The wireless connection device that has received this incoming signal
Immediately after the call signal ID: A, I
Send from the control channel including D: B and ID: C. Since the wireless telephone 17 in the standby state constantly monitors the control channel, when it receives this incoming call signal including its own ID: C, it immediately sends out an incoming call response signal to the wireless connection device 14 on the calling side. Upon receiving this response, the wireless connection device 14 transmits the code (channel designation) of the communication channel to the wireless telephone 17 as in the case of calling, and shifts to the communication channel. After shifting to the call channel, the wireless telephone 17 rings the bell and starts calling. At this time, when the wireless telephone 17 side goes off-hook, an off-hook signal is sent out, the wireless connection device 14 receiving this signal informs this off-hook to the wireless line control device 11, and the wireless line control device 11 triggers this off-hook to send the fixed telephone network. Responding to 16Hz on the 12 side (closing the loop), the incoming connection is completed. The method of using the identification code (ID) at this time is a method of collating the other party for both transmission and reception as in the case of calling.

In the case of the above incoming and outgoing calls, at the end of the call, an off-hook signal including the identification code is transmitted by the off-hook operation from the wireless telephone 17, and the wireless line control device 11 opens the line loop on the fixed telephone network 12 side.

Location Registration Next, FIG. 4 shows a location registration processing control sequence for making a call and receiving a call by the wireless telephone 17 selecting the wireless connection device 14 of the connection destination, that is, the existing wireless zone 16. This example
A method of starting location registration by the user operating a special key of the wireless telephone 17 (in this case, a location registration button) will be described. When the user presses the location registration button on the wireless telephone 17 side, a signal requesting location registration is sent from the wireless telephone 17. The position registration request signal does not include the identification code ID: B of the wireless connection device of the connection destination, unlike the call origination signal, but includes only its own ID: C and system ID: A. Each wireless connection device 14 that has received this position registration request signal is connected to the wireless line control device 11.
In response, a location registration request signal including the identification code (ID: C) of the requesting wireless telephone and its reception level information is transmitted.
The wireless line control device 11 receives the position registration request signal transmitted from the plurality of wireless connection devices 14, determines the wireless zone 16 in which the requesting wireless telephone 17 exists, and determines whether the wireless zone 16 is wireless. The wireless telephone 17 is notified that the location registration is completed by relaying the connection device 14. At this time, as a method for determining the zone in which the mobile station is located, it is appropriate to use the strength of the reception level performed by the mobile phone, in this case, the level at which the location registration request signal is received by the wireless connection device 14. The wireless telephone 17 that has requested the location registration waits for the location registration completion signal, receives the location registration completion signal, and at the same time stores the identification code ID: B of the transmission source wireless connection device 14 included in this signal to perform the location registration. The process ends.

Next, another method of position registration in which the wireless telephone 17 selects the wireless connection device 14 of the connection destination will be described. The control sequence is shown in FIG. 5, and the system configuration for the explanation is shown in FIG. From the wireless connection devices 14a and 14b side, the position information including the identification code ID: X, ID: B of the own wireless connection device and the system identification code ID: A is periodically notified for each wireless zone 16. As shown in FIG. 6, on the side of the wireless telephone 17, the identification code I of the wireless connection device stored in itself by the movement is stored.
When D: X and the identification code ID: B of this wireless connection device to be notified are different, the wireless connection device 14b that transmitted the notification signal
To the location registration update request. This location registration update signal includes ID: A, ID: B, ID: C. Upon receiving the position registration update request signal, the wireless connection device 14b transmits a position registration update signal including the identification code ID: C of the requesting wireless telephone to the wireless line control device 11, and at the same time, the requesting wireless telephone 17
A signal for notifying that the update has been completed is sent to and the position registration update processing ends. Upon receiving this completion signal, the requesting wireless telephone 17 updates the memory for storing the identification code of the wireless connection device of the connection destination, and the process ends.

In this way, location registration can be automatically performed while the wireless telephone is on standby.

[Advantages of the Invention] As described above, according to the present invention, the line control function performed by the radio line control device is minimized, and the radio line 18 uses the multi-channel access technology conventionally used in cordless telephones and the like. A simple mobile communication system can be realized by applying a control method to achieve distributed control. The method of the present invention can achieve a great economic efficiency as compared with a car phone, while it can provide a service by adding a location registration function as compared with a cordless phone which has been developed as a wireless phone that enables indoor movement. The area can be expanded.
Moreover, the system can be installed only by the work of connecting the wireless line control device to the general subscriber line from the PBX or the general subscriber exchange and the work of installing the wireless connection device, and the installation work can be simplified.

Specific effects are shown below.

 Economical system construction is possible.

Mobile phone services, etc. can be realized in limited areas such as buildings.

If it is installed in the building, the extension of the PBX can be used and the construction is simple.

Note that the multi-channel access control method does not necessarily have to be used. Further, in the wireless line control device, the control line for the wireless telephone and the call line may be shared.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of the system of the present invention, and FIG.
FIG. 4 is a diagram showing an outgoing call control sequence, FIG. 3 is a diagram showing an incoming call control sequence, FIG. 4 is a diagram showing an example of a location registration control sequence, and FIG. 5 is another example of a location registration control sequence. FIG. 6 and FIG. 6 are block diagrams showing an example of a system configuration used for the explanation of FIG.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Reference number within the agency FI Technical indication location 7304-5K H04Q 7/04 C (72) Inventor Akiho Sasaki 1-2356 Takeshi, Yokosuka City, Kanagawa Japan (72) Inventor Takeshi Hattori 1-2356 Takeshi, Yokosuka City, Kanagawa Japan Telegraph and Telephone Corporation Second Research Laboratory

Claims (1)

[Claims] 1. A wireless line control device for controlling wireless line control of a wireless connection area consisting of one or more wireless zones, and a wireless connection device connected to the wireless line control device by a wired line and arranged in each wireless zone. And a wireless telephone connected to these wireless connection devices by a wireless line and moving in the wireless connection area. The wireless line control device has a function of connecting to a fixed telephone network and the fixed line for connecting and receiving a call. The wireless network controller, the wireless connection device, and the wireless telephone have an exchange processing function between a telephone network line and a wired line to the wireless connection device, and a subscriber memory required for the exchange process. Each has a device identification code, and when controlling call origination, call reception, and location registration, these identification codes are combined to identify each other. It has a position registration function for selecting a connection device, and by performing the position registration, the wireless telephone and the wireless line control device synchronously store the identification codes necessary for making and receiving calls in their respective memories. , The combination of the wireless connection device and the wireless telephone that are mutually accessible is determined by the identification code registered in the position,
The connection control for calling and receiving calls is a mobile wireless communication system that is performed between a one-to-one wireless telephone whose correspondence is established by the location registration and a wireless connection device.