JPS5847341A - Mobile communication system - Google Patents

Abstract

PURPOSE:To attain the control of connection with high efficiency, by connecting numbers of base radio stations which are distributed with extremely high density to the terminals of the end offices in an ordinary telephone network. CONSTITUTION:A mobile control station is set at a lower position of an end office EO in the stage of exchange in a telephone network. A mobile control center is set at a position equivalent to a trunk exchange stage comprising an office rank of a toll center TC, a district center DC and a regional center RC. For a call given from a mobile telephone, the circuit is connected in the same procedure as the connection of circuit in a telephone network from the office EO. For an incoming call to the mobile telephone, a circuit is once set to the mobile control center from the office EO or the centers TC, DC and RC. In a range from the mobile control center to the incoming side end office EO where the mobile telephone exists, there is connected by the telephone network.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to connection control for a mobile communication system connected to a public telephone network.

The line configuration of current car telephones is as shown in FIG. In FIG. 1, Re is an abbreviation for a general office, DC is a central office, TC is an abbreviation for a central office, and EO is an abbreviation for an end office, which represents the switching hierarchy in a general telephone network.

AMC is a mobile telephone exchange, MC8 is a radio network control center,
MBS is an abbreviation for wireless base station. There is one AMC station in each of the Tokyo and Osaka service areas, and MC8 has a few laps per AMC, and MBS has one station per AMC.
There are several rounds per 8 or more. When calling from a landline phone to a car phone, the subscriber must, for example, call 030-31~XXXX
Dial XX. 030 is an identification number representing a car phone, 31 is a number representing the current location of the car, and 31 shows an example of Tokyo.

xxxxxx is the subscriber number of the car phone. At 030, I learned that the call was to a car phone on EO and TC of the general telephone network, and then at 031, I heard that the call was to an AM in Tokyo.
It is connected to C, and then AMC and MC8.

It is connected to the car phone via the MBS route.

In the case of a car phone, since the range of movement of the car is wide, the area covered by the MBS consists of small zones with a radius of several tens of meters. Further increasing the subscriber capacity can be achieved by further reducing the area of the MBS and increasing the repeat utilization rate of the radio frequency. For example, if a zone configuration with a radius of 500 m can be achieved, the capacity will theoretically be 100 times that of a zone configuration with a radius of 5 km. In actual cases, the utilization rate will be lower than this due to interlaced propagation, but an improvement of at least 10 times can be expected. Such a minimal zone configuration may not be applicable to a car phone because the frequency of channel changes during a call is extremely high considering the speed at which the car is running; however, in the case of a mobile phone, is quite conceivable.

When configuring such a small zone, a wireless base station (MBS)
are installed in enormous density and quantity, so it is not necessarily advantageous to install mobile exchanges for toll exchanges like conventional AMCs in terms of processing capacity. Since there are dozens of MBSs per local exchange area, it is more appropriate to think of mobile exchanges as compatible with local exchanges.

The object of the present invention is to realize a line configuration and a connection control system in a mobile communication system in which an extremely large number of MBSs are arranged in an extremely small zone configuration as described above. The invention will now be explained in detail with reference to the drawings.

FIG. 2 shows an example of a line configuration according to the present invention. A plurality of radio base stations are connected to one mobile control station.

Furthermore, the communication lines from one or more mobile control stations are connected one-to-one to the subscriber lines of the EO of the general telephone network. Furthermore, a mobile control center will be provided to handle the intercity exchange schedule. The number for the mobile station is given as mobile service identification number + mobile subscriber number, for example 040XXXXXXX.

The mobile device always registers the location of the existing mobile control station area. This method is similar to the current car telephone system, in which a number identifying each mobile control station is sent in the transmission signal from the base station, and when the mobile unit moves, this mobile control station identification number is This can be realized by a method such as sending a location registration signal when the location changes. A location registration signal from a mobile device is transmitted via a radio base station to a mobile control station, and the mobile control station registers the location of the mobile device with a mobile control center via a control line. The mobile control center has a subscriber mail 41J for each subscriber, and the location information of that subscriber.

Subscriber class (VIP or not, etc.), frequency fee, etc. (hereinafter referred to as subscriber information) are stored. If there are multiple mobile control centers, each mobile subscriber is registered with a particular mobile control center (referred to as a home memory station). In this case, for example, by assigning a number to the first 1 or 2 digits of the subscriber number so that the mobile control center can be identified, the home memory station can be known from the subscriber number (for example, I XXXXXX is assigned to the mobile control center in Osaka). 2 XXXXXX represents a registered mobile subscriber). FIG. 3 shows the control procedure in the case of a call originating from a mobile subscriber.

The numbers in the following description correspond to the numbers shown in FIG.

(2) The mobile device transmits a calling signal consisting of the mobile device number, dialed number, etc. to the wireless base station.

■、■、The mobile control station that received the calling signal from the wireless base station selects the wireless base station that has received the signal from the mobile device most strongly, and selects the existing wireless base station of the mobile device. At the same time, it accesses the mobile control center (11), which is the home memory station of the mobile device, through the control line and reads subscriber information (such as whether or not the subscriber is a regular subscriber).

(2) If the mobile control station determines that Q connection is possible based on this subscriber information, it performs call processing to the EO in the same manner as in the case of a normal fixed telephone. In other words, it supplements a vacant line among the multiple communication paths to the EO, closes the DC loop (equivalent to off-hook in a regular phone), and converts the dial number received from the mobile device into a dial pulse or PR multiplier signal to reach the EO. Send to.

Connection is made from EO using exactly the same procedure as a regular telephone.

(2), (2) When the called subscriber answers, a subscriber response signal is returned to the calling EO.

(2) In EO, charging starts from this point, and a charging pulse is sent to the mobile control station. The mobile control station counts these billing pulses and calculates frequency charges for the mobile device. The method of transmitting the charging pulse is, for example, EO.
This can be easily realized by applying the EO and public telephone interface as the ink interface of the mobile control station.

(2) When the mobile device ends the call, (2) notifies the mobile control center (1) of the home memory station of the frequency fee at that time. The mobile control center (1) of the home memory station adds this amount to the frequency fee in the subscriber information.

FIG. 4 shows a connection control procedure when a call arrives at a mobile station. The numbers in the following description correspond to the numbers shown in FIG.

■When dialing from a landline telephone to call a mobile device, I
When the mobile terminal learns that the call is coming from 040 or TC to the mobile device, it connects the line to the nearest mobile control center (1).

(2) The mobile control center (1) learns the home memory station from the mobile subscriber number and queries the mobile control center (2), which is the home memory station, for subscriber information via a control line. .

■The mobile station receives notification of the existing mobile control station number, etc. of the mobile station from the mobile control center (2), which is the home memory station.
The control center (1) notifies the originating TC or BO of the EO number of the existing mobile control station of the mobile device via the control line (common line signal) K. The TC or EO that receives this determines the charging index based on this EO number.

For example, the existing mobile control station number of the mobile device is 0422-5.
7-3000. 0422-57 is the area and city area code of EO that the mobile control station carries, and 3000 is the EO area code.
This is the representative number assigned to the line from the station to the mobile control station. When a plurality of mobile control stations are connected to one EO, a different representative number is assigned to each mobile control station.

■The mobile control center (1) leaves the call line between the calling party's general phone and the mobile control center (1) on hold and calls 0422-57.
-3000 dial number connects to the existing EO of the mobile device and even to the mobile control station. Since the plurality of lines from the EO to the mobile control station are represented by a representative number, the call will arrive at the mobile control station on one of the available lines.

(2) The mobile control station sends a response signal to the EO by, for example, closing a DC loop. For the EO, this is the same as a response from the subscriber of the telephone set connected to that line, so a response signal is returned to the upper station.

■When the response signal is received by the mobile control center (1) in this way, the mobile control center (1) sends the temporarily stored mobile device number XXXXXXX to the mobile control station through the set telephone line. do. This signal can be realized, for example, as a summer signal.

(2) The mobile control station calls the mobile device from the wireless base station using the received mobile device number.

(2) Based on the automatic response signal from the called mobile device, the mobile control station learns the existing wireless base station of the mobile device in the same way as when making a call. The mobile device notifies the mobile subscriber of the incoming call by a bell or the like.

(2) The mobile control station transmits the mobile device response signal to the mobile control center (1) within the access line using a tone signal or the like.

[Phase] When the mobile control center (1) receives this, it sends a ring bank tone to the originating telephone.

@ When the called mobile subscriber answers, the signal is relayed to the mobile control center (1) via the mobile control amount.

At this point, the mobile control center (1) transfers the information from the originating phone to the mobile control center (1) and from the destination mobile device to the mobile control center (1).
) line and sends the same signal as a general incoming telephone subscriber responds to the @0 originating EO. At the originating EO or TC, the call requesting connection to the upper station (mobile control center (1)) at 040 XXXXXXX appears to be answered by the called subscriber for the first time at this point, so it is the same as in a normal case. Connections and calls are made as follows.

In the above explanation, the mobile control station and the mobile control center have been described as independent stations, but this is the same even when they are functionally merged with an EO or TC.

In addition, in the line configuration shown in Figure 2, the mobile control center is TC and RC.
Although an example is shown in which the terminal is connected to the existing network, the effect of the present invention is the same even if it is connected to the toll exchange floor of the existing network.

In addition, in the explanation of FIG. 3, an example was explained in which a billing pulse for the mobile device is sent to the mobile control station, but after the end of the call, the EO notifies the mobile control station of the frequency, or the mobile control station itself can also dial the number. A method may also be used in which a billing index is determined and the number of calls is calculated.

Furthermore, if a common channel signal network is established between the exchanges, all signals between the destination EO and the mobile control center (1) described in FIG. 4 can be transmitted by common channel signals.

As explained above, according to the present invention, a large number of radio base stations arranged at a very high density can be connected to the EO terminal of the general telephone network, thereby enabling efficient and practical table control.

[Brief explanation of the drawing]

Fig. 1 is a line configuration diagram of a current car telephone, Fig. 2 is a line configuration diagram of an embodiment of the present invention, Fig. 3 is a diagram illustrating an outgoing connection from a mobile device in an embodiment of the present invention, and Fig. 4 The figure is a diagram illustrating an incoming call connection to a mobile device in an embodiment of the present invention. RC: General office, DC: Central office, TC: Central office, EO: Terminal office, AMC: Car telephone exchange,
MC8...Radio line control station, MBS...Radio base station. 10 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] l. A mobile control station is provided below the terminal station in the switching hierarchy in a telephone network configuration, and is located at a position corresponding to the long-distance switching hierarchy consisting of the central office, central office, and general office hierarchy. A mobile control station is installed in the mobile terminal, and when a call is made from a mobile device, the line is connected from the terminal station using the same procedure as the line connection in the telephone network. A mobile communication system characterized in that a line is once set up from a station or a central office to the mobile control center, and the telephone network is used to connect the mobile control center to the destination terminal station where the mobile device currently exists. 2. In the mobile communication system according to claim 1, the subscriber dial for incoming calls to the mobile device is mobile.
The service identification number shall be the mobile subscriber number, and the connection from the mobile control center to the terminating mobile control station shall be made using a number corresponding to a specific subscriber in the terminating terminal station, and the mobile subscriber number shall be transmitted after connection. A mobile communication system characterized by λ A mobile communication system according to claim 1, characterized in that the interface conditions between the mobile control station and the terminal station are the same as those in public telephones of a general telephone network. In the mobile communication system according to claim 2, when a call arrives at a mobile device, a subscriber response signal in the existing telephone network is sent as a mobile subscriber number transmission request signal from the destination mobile control station to the mobile control center. A mobile communication system characterized by the use of 5. In the mobile communication system according to claim 1, when a call arrives at a mobile device, after receiving an automatic response signal from the mobile device at the mobile control center, the mobile control center sends a message to the calling party. A mobile communication system characterized by transmitting a ringback tone.