JPH11252612A - Radio private branch of exchange and radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the radio private branch of exchange and the radio communication system where a mobile set (PS) in a private area is directly accessible to a public PHS network when part of an enterprise using the private branch of exchange is within an area of the public PHS in the area of the private PHS and at the outside of the area of the public PHS covering a base station connecting to the private branch of exchange. SOLUTION: A relay CS 18 is installed in a service area 131 of a public CS 13 and is operated for the public CS 13 as if it were three public PS. A PS 19 is accessible to other PS 19 in a same enterprise 15 and is directly accessible to a public PHS network 12 via a private CS 17, a private branch of exchange 16, the relay CS 18 and the public CS 13 within an area of a private CS 17 even at the outside of the service area of the private CS 17 from a place anywhere the enterprise 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless private branch exchange and a wireless communication system, and more particularly, to a public PHS (Personal).
The present invention relates to a wireless private branch exchange and a wireless communication system capable of making and receiving calls to and from a Handyphone System) network.

[0002]

2. Description of the Related Art FIG. 7 is a block diagram showing an example of a conventional wireless communication system having a wireless private branch exchange. In the figure, in a business establishment 15, one private branch exchange (PBX or key telephone device) 23 is connected to one or more private radio base stations (C
S) 22 is connected, and the relay device 24 is installed. The mobile station (PS) 19 is located in the area 240 of the relay device 24 and the service area 221 of the local CS 22. The private branch exchange 23 is connected to the public network 11 via the public line 14.
It is connected to the.

Further, public PHS (Personal Handyphone)
A public CS 13 is connected to the (System) network 12 to form a service area 131. The office 15 is only partially in the service area 131 of the public CS 13. The relay device 2 is provided in a part of the business office 15 in the service area 131.
4 is installed, and converts public radio waves to private use within the area 240 and transmits them. PS19 is premises CS22
Only in the overlapping portion of the area 221 and the area 240 of the relay device 24, the mobile terminal is in a simultaneous standby state of receiving the control signals of both the local CS 22 and the relay device 24, and can make and receive calls for both the private company and the public company.

Since the output of the radio wave of the public PHS network 12 is smaller than that of a portable telephone, in a building, it often reaches only a window. Therefore, it is common to install the relay device 24 for use in the building of the business office 15 near a window of the building.

FIG. 8 is a block diagram showing an example of the relay device 24. 7, the same components as those in FIG. 7 are denoted by the same reference numerals. In FIG. 8, the relay device 24 is a public PS unit 2
41, a self-service CS unit 242, and a protocol conversion unit 243. The public PS unit 241 operates as if it were a public PS with respect to the public CS 13 and transmits and receives public radio waves.

[0006] The self-operated CS unit 242
It operates as if it were a private CS and transmits and receives private radio waves. Then, the protocol conversion unit 243 converts between the public and privately owned protocols. The “radio wave” here indicates a frequency and a protocol.

FIG. 9 shows the public CS 13, the relay device 24 and the PS.
19 shows a transmission / reception timing example. PHS signal is TD
The MA / TDD method (that is, the access method is a time division multiple access (TDMA) method and the transmission method is the TDD method), 5 msec is defined as one frame, one frame is divided into eight time slots, and four time slots are further divided. Each is divided into uplink (from PS to CS) and downlink (from CS to PS).

[0008] In FIG. 9, the public CS 13 communicates with the relay device 24 through the slots 11, 21. . . At the timing of slot 15, 25. . . Is received at the timing of In addition, the relay device 24 communicates with the PS 19 in the slots 13, 23. . . At the timing of slot 1
7, 27. . . Is received at the timing of At this time, the relay device 24 converts the public signal received from the public CS 13 in the slot 11 into a private signal, transmits it to the PS 19 in the slot 13, and converts the private signal received from the PS 19 in the slot 17 into a public signal. After conversion, slot 2
5 to the public CS 13 and repeats this.

FIG. 10 shows the public CS 13, the relay device 24 and P
It is another example of the transmission / reception timing of S19. FIG.
0, the public CS 13 communicates with the relay device 24 in the slots 11, 21. . . At the timing of slot 15, 25. . . Is received at the timing of Also,
The relay device 24 communicates with the PS 19 in the slots 17, 2
7. . . At the timing of slots 13 and 2
3. . . Is received at the timing of At this time, the relay device 24 converts the public signal received from the public CS 13 in the slot 11 into a private signal,
After transmitting to S19, the private signal received from PS19 in slot 13 is converted into a public signal, and then transmitted to public CS13 in slot 15, and this is repeated.

In FIGS. 9 and 10, the repeater 24 uses every other slot. However, this is because the conventional repeater uses a transceiver and a frequency setting synthesizer to reduce the size and cost. This is because there is only one and the adjacent slot cannot be used because the frequency cannot be switched in time between the completion of transmission of a certain slot and the start of transmission of the next slot.

In order to make adjacent slots usable by one transceiver, two synthesizers are prepared, the first and third slots use one synthesizer, and the second and fourth slots use the other synthesizer. Like using
It is common to alternate between the two synthesizers.

Conventionally, a radio communication system using a public PHS in a private area is known (Japanese Patent Laid-Open No. 8-331).
647). In this method, a wired connection is made directly from the public PHS network to the PBX, and the premises CS alternately transmits and receives self-owned and public radio waves.

In the wireless communication system described in JP-A-8-182037, similarly to the system described in JP-A-8-331647, a wired connection is directly made from the public PHS network to the PBX, and the premises CS is self-owned. Transmitting and receiving radio waves. Furthermore, the location registration database of the private network and the public P
The system configuration is closer to the public PHS network, such as by mutually communicating the location registration database of the HS network.

[0014] Conventionally, the outside line side of the PBX is connected to a public P.
A device connected to a public CS of an HS network is also known (Japanese Patent Application Laid-Open No. 9-191483). This device is connected to a public CS by a pseudo PS called a P trunk, and the P trunk is replaced with a conventional outside trunk, and the outside line is made wireless.

[0015]

However, in the conventional wireless private branch exchange shown in FIG. 7, outgoing / incoming calls in the public PHS are limited to the area 240 of the relay device 24, and the private PHS
Since the entire area cannot be covered, there is a problem that access to the public PHS network 12 cannot be performed from the entire business establishment 15.

The conventional relay device 24 is originally developed for home use, and is not intended for use at the business office 15, so that the relay device 24 should not be used by anyone other than the PS of the owner of the relay device 24. To be used, PS-I of available PS
Although D is registered, there is a problem that the number of PSs that can be registered is about 10, which is not enough for use in the entire office 15.

Further, in the conventional wireless private branch exchange shown in FIG. 7, since the conventional repeater 24 has only one transceiver and one synthesizer as described above, a maximum of two slots can be simultaneously used. Since only transmission and reception can be performed and two slots are required for relaying one call, only one relay device 24 can relay only one call at a time. Further, since the control signal cannot be transmitted during the call, the other PS cannot receive the control signal from the relay device 24 during the call, and the public PHS network 1
There is also a problem that the state 2 is out of service area.

In the wireless communication system described in Japanese Patent Laid-Open No. Hei 8-331647, since a wired connection is made with a public PHS network, negotiation and construction with a public PHS operator are required, and large traffic is expected. Without it, it is difficult to negotiate with public PHS operators, so it is difficult to introduce them into small-scale establishments.

In the wireless communication system described in JP-A-8-182037, since the system is large-scale due to mutual communication of a location registration database and the like, the system described in JP-A-8-331647 is used. In addition, it is difficult to introduce it in small business establishments, and large-scale changes are required on the public PHS network side, such as mutual communication between the local area network and the location registration database of the public PHS network.
There is a problem in authentication and security because the side also charges the public PHS network.

In the wireless private branch exchange described in Japanese Patent Application Laid-Open No. 9-191483, the extension side is the same as the conventional one, that is, a wired terminal or a private PHS network independent of the public PHS network. Not directly accessible. This is apparent from the fact that the prior art aims at making the outside line wireless and simplifying the line installation.

The present invention has been made in view of the above points,
Private PH covered by base station connected to private branch exchange
In the area of S and outside the area of the public PHS, if the part of the office using the private branch exchange is within the area of the public PHS, the mobile unit (P
It is an object of the present invention to provide a wireless private branch exchange and a wireless communication system in which S) can directly access a public PHS network.

It is another object of the present invention to provide a wireless private branch exchange and a wireless communication system which can easily and inexpensively construct a system.

Still another object of the present invention is to provide a wireless private branch exchange and a wireless communication system capable of increasing the number of mobile stations that can be registered and increasing the line capacity.

[0024]

In order to achieve the above object, a private branch exchange according to the present invention is provided with a communication channel for one or more private radio base stations installed on the premises and a public radio base station outside the premises. A communication path switch for connecting and disconnecting between channels including at least a connection with a communication channel of one or more relay radio base stations installed in the service area and on the premises, and the communication channel is connected to the communication path switch A tone generation circuit for generating various tones is connected to each control channel of the local radio base station and the relay radio base station to transmit and receive control signals, and based on the control signals, a channel of a speech path switch. A control unit for performing connection / disconnection control between the premises and a premises mobile device that performs wireless communication with the premises radio base station, a public telephone number, an authentication key, and location registration information. Having at least a stored database, and a local mobile base station and a public wireless base station located in the area of any local wireless base station among the local wireless base stations installed on the local premises. This is a configuration in which communication between them is performed via a relay wireless base station.

In order to achieve the above object, a wireless communication system according to the present invention is provided in a service area of at least one premises radio base station installed on the premises and a public radio base station outside the premises, and , One or more relay radio base stations installed in the premises and capable of wireless communication with a public radio base station, and setting and connection of a communication channel between the premises radio base station and the relay radio base station When there are a plurality of private radio base stations, a private branch exchange for setting and disconnecting a communication channel between the private radio base stations and a private radio base station for wireless communication 1
Communication between the mobile station and the public wireless base station via the private wireless base station, the private branch exchange, and the relay wireless base station, and the private wireless base station and the private wireless base station. Communication between mobile units is performed via an exchange.

In the above-described wireless private branch exchange and wireless communication system of the present invention, a private mobile station located in an area of any private wireless base station among private wireless base stations installed in the private premises, that is, Even if the mobile station is out of the service area of the public wireless base station and is located in the area of the private wireless base station, the mobile station can access the public wireless base station via the private wireless base station, the private branch exchange, and the relay wireless base station. Communication with stations is possible.

Therefore, in a private branch exchange installed at an office where only public parts of the premises can reach the public radio waves, such as at a window, a relay radio base station installed at a place where public radio waves can reach, such as a window, is used. By converting a public radio wave into a private radio base station via a switchboard and relaying it to a private radio wave, it is possible to access the public network even in a premises where the public radio wave does not reach.

Further, the above-mentioned public wireless base station is a public wireless base station.
It is set to perform wireless communication with the HS network, and even if the mobile station is located outside the service area of the public wireless base station, it passes through the local wireless base station, private branch exchange, and relay wireless base station. Communication with the public PHS network.

Further, in the present invention, the relay radio base station includes one transceiver and two synthesizers for frequency setting, and performs simultaneous transmission and reception of four slots.
This is desirable because two to four calls can be made at the same time.

In the present invention, the private branch exchange notifies the relay radio base station of only the public telephone number of the private mobile station located in the area of the private radio base station from the internal database. This is desirable because the load on the control unit inside the private branch exchange can be reduced.

Further, in the present invention, the private radio base station alternately transmits a private control signal and a public control signal for public access at intermittent transmission timings, and also controls the private control signal and the public control signal. It is desirable that the control signals include CS-IDs different from each other, since it is possible to determine whether the control signal is from the mobile station to the relay radio base station or from the relay radio base station to the mobile station.

[0032]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a configuration diagram of an embodiment of a wireless private branch exchange and a wireless communication system according to the present invention. The terms and procedures used in this embodiment are based on the second generation cordless telephone system standard (RCR STD-28) issued by the Association of Radio Industries and Businesses. In addition, in a plurality of drawings, the same reference numeral indicates the same component.

In the radio communication system according to the embodiment shown in FIG. 1, a public network 11 including a public PHS network 12 is connected to a public radio base station (CS) 13 while a business office is connected via a public line 14. 15 is connected to a private branch exchange 16. Private branch exchange (PBX) installed in the business office 15
At least one local radio base station (CS) 17 and one or more relay radio base stations (CS) 18 are connected to the key telephone device 16. In addition, a mobile station (PS) 19 also exists at an arbitrary position.

The private branch exchange 16 includes a call path switch 161 for connecting a call path, a control unit 162 for controlling the entire private branch exchange 16, a dial tone (DT), a busy tone (BT),
A tone generation circuit 163 for generating a tone such as a ring back tone (RBT) is provided. The control unit 162 includes a PS database 1621 that stores information such as an extension number of a PS used for the premises, a public telephone number, an authentication key, and location registration information.

The communication path switch 161 has a premises CS 17,
The communication channels of the relay CS 18 and the tone generation circuit 163 are connected, and connection / disconnection between the channels is performed according to an instruction from the control unit 162. The control unit 162 includes a premises C
S17, the control channel of the relay CS18 is connected, and transmission and reception of control signals are performed.

The premises CS 17 alternately transmits premises control signals and public control signals for public access at intermittent transmission timings. Although these two control signals both use a private frequency and a private protocol, the use of different CS-IDs for private use and public access makes it possible to determine which control signal is up (PS to CS). It is possible to identify whether it is a signal to or not.

Also, the control signal between the private CS 17 and the private branch exchange 16 has a signal format to which an identifier for distinguishing between private use and public use is added similarly to the wireless section. This identifier is a terminal termination point identifier (T
Methods such as discrimination by EI) and addition of a header for identifying the mode to the message of layer 3 are possible, but the means is not limited in this embodiment.

The relay CS 18 includes one transceiver and two synthesizers for frequency setting, and enables simultaneous transmission and reception of four slots. However, most of the public CSs 13 use one of the four slots for the control channel, and up to three calls can be made at the same time. In this embodiment, the relay CS 18 also makes three calls at the same time. Up to. Thereby, one relay CS 18 is installed in the service area 131 of the public CS 13 and the public C
For S13, it operates as if it were three public PSs.

When the public CS 13 includes a plurality of transmitting / receiving units and can perform four or more calls at the same time, the relay CS 18 of the present embodiment can simultaneously perform up to four calls.

The PS 19 can listen to and make calls to both the private control signal and the public control signal which are transmitted alternately. In the case of an outgoing call, a selection is made by button operation on the PS 19 as to whether to initiate a call for a private use (premise mode) or to call for a public use (public mode). When the PS 19 originates a call in the private mode, the PS 19 places the private CS-ID in the destination identification code of the control signal and initiates the call. Control unit 162
Receives the information via the private CS 17, identifies that the call is in the private mode, and performs a call connection process in the private branch exchange 16.

When the PS 19 calls in the public mode, P
In step S19, a call is made by inserting the public CS-ID into the destination identification code of the control signal. The control unit 162 receives the information via the local CS 17, identifies that the call is a public mode call, connects to an empty port of the relay CS 18,
18 to transfer the call setup message received from the local CS 17.

Upon receiving this call setup message, the relay CS 18 establishes a radio link with the public CS 13 and transmits the call setup message. Similarly, messages after the call setup are also in the local CS 17-control unit 162-relay CS1.
8 and transfer the PS 19 to the public PHS network 12.

FIG. 2 is a timing chart of transmission and reception of control signals between the local premises CS 17 and PS 19. Premises CS1
Reference numeral 7 intermittently transmits a private control signal and a public control signal at their own timing. However, in order not to overlap both timings, the same intermittent transmission cycle
The timing is shifted and transmission is performed alternately. here,
The intermittent transmission cycle is 5 for one frame of the TDMA / TDD system.
The value is n times the value of msec. Also, PS19 is
It receives both on-premise and public control signals. The two control signals both use a private frequency and a private protocol.

FIG. 3 is a timing chart showing transmission / reception of communication signals of the entire system. The signal of PHS is TDMA /
This is a TDD system, in which 5 msec is defined as one frame, one frame is divided into eight time slots, and further four slots are up (from PS to CS) and down (from CS to PS).
To).

In FIG. 3, the public CS 13 communicates with the relay CS 18 in the slots 11, 21. . . At the timing of the frame period, and the slots 15, 25. . . At the timing of the frame period. In addition, campus CS1
7 is connected to PS19, and slots 13, 23. . . At the timing of the frame period of
7. . . At the timing of the frame period.

At this time, the control unit 162
1 to pass the signal received from the public CS 13 to the relay CS 18 to the local CS 17, from which the signal is transmitted to the PS 19 in the slot 13, the signal received from the PS 19 in the local CS 17 to the relay CS 18 in the slot 17, and
5 to the public CS 13 and repeats this.

However, in FIG. 3, for simplicity of explanation, the transmission / reception timing between the public CS 13 and the relay CS 18 and the transmission / reception timing between the local CS 17 and the PS 19 are the same, and the transmission is performed in the slot two after the reception However, in reality, the timings of the two do not always match. Also, the relay CS18-control unit 162
Since the communication processing time between the local CSs 17 is added, the delay from the actual reception to the transmission becomes larger than the timing in FIG.

Next, the operation of the embodiment of the present invention will be described with reference to the system configuration diagram of FIG. 1 and the sequence diagrams of FIGS. 4, 5 and 6.

First, the premises CS1 shown in FIGS. 1 and 4 are used.
7 (17-1), one PS19 (P
The operation when calling from the S19-1) the PS19 (PS19-2) located in the area of another premises CS17 (17-2) in the premises mode will be described.

The PS 19-1 selects the private mode by operation on the PS, dials the extension number, and performs a call completion operation such as pressing a call button. The establishment request message is sent to the local CS1
7-1 (step A1 in FIG. 4). Premises CS1
7-1, upon receiving the link channel establishment request message, searches for a free communication channel and slot (carrier sense), and uses the found free channel and slot to transmit a link channel assignment message to PS19.
-1 (step A2 in FIG. 4), and since the destination identification code included in the link channel establishment request message is the private CS-ID, it is recognized that this call is a call in the private mode. I do.

Here, the PS 19-1 and the premises CS 17-1
Transitions from the control channel to the talk channel on the allocated slot, and on layer 1 and layer 2 on the talk channel.
(Step A3 in FIG. 4). Thereafter, transmission and reception of layer 3 messages are performed, and PS19-1
Sends a call setup message (step A in FIG. 4).
4).

Local CS 17 receiving the call setup message
-1 adds an identifier indicating that the message is in the private mode, and transmits the message to the control unit 162 in the private branch exchange 16 (step A5 in FIG. 4). The addition of this identifier is a layer 3 between the local CS 17-1 and the control unit 162 thereafter.
Messages are sent and received. The control unit 162 that has received the call setting message returns a call setting acceptance message to the PS 19-1 via the local CS 17-1 (step A6 in FIG. 4), and the PS database 16
21 and checks whether the extension number of the PS 19-1 is registered. If the extension number is registered, the PS authentication procedure is started (step A7 in FIG. 4). The details of the authentication procedure are omitted because they are not directly related to the present invention.

When the validity of PS19-1 is confirmed in the authentication procedure, control unit 162 obtains the extension number of PS19-2 from the called number information element of the call setup message, and acquires the extension number of PS19-1.
2 is obtained from the PS database 1621, and transmits a call setup message with a local mode identifier added to the local CS 17-2 of the obtained general call area number (FIG. 4
Step A8).

Local CS 17 receiving the call setup message
-2 transmits an incoming call message using the local CS-ID as the calling identification code to the PS 19-2 (step A in FIG. 4).
9). The PS 19-2 that has received the incoming call message transmits a link channel establishment request using the local CS-ID as a destination identification code to the local CS 17-2 (step A1 in FIG. 4).
0).

The local CS 17-2 performs carrier sense similarly to the case of the PS 19-1, and after transmitting the link channel assignment message (step A11 in FIG. 4), establishes the layer 1 and layer 2 links on the communication channel. (Step A12 in FIG. 4). When Layer 1 and Layer 2 are established, PS 19-2 sends an incoming call response message to the local C
The local CS 17-2 transmits the call setup message to the PS1 (S17-2) (step A13 in FIG. 4).
9-2 (step A14 in FIG. 4). Upon receiving the call setting message, the PS 19-2 returns a call setting accepting message (step A15 in FIG. 4).

The call setting acceptance message is sent to the local CS 17-2.
Is transferred to the control unit 162 (step A1 in FIG. 4).
6). Then, similarly to the case of PS19-1, the control unit 162 activates the reference to the authentication procedure of the PS database 1621 (step A17 in FIG. 4). PS19 in the authentication procedure
-2, the PS 19-2 sounds a ringing tone and sends the calling message to the local CS 17-2.
(Step A18 in FIG. 4).

The paging message is transferred from the local CS 17-2 to the control unit 162, the local CS 17-1, and the PS 19-1 (steps A19 to A21 in FIG. 4). Further, the control unit 162 controls the tone generation circuit 163 of the communication path switch 161.
Ring back tone (RBT) channel and local CS
The channel used by PS19-1 of 17-1 is connected, and the RBT is transmitted to PS19-1 (step A22 in FIG. 4).

When the PS 19-2 performs a response operation, a response message is transmitted from the PS 19-2 to the local CS 17-2 (step A23 in FIG. 4), and the response message is transmitted through the same route as the call message to the PS 19-1. (Steps A24 to A26 in FIG. 4). Also, the calling side PS
19-1 to the local CS 17-1 to the control unit 162 and the receiving side PS 19-2 to the local CS 17-2 to the control unit 162 independently transmit and receive a response confirmation message (steps A27 to A30 in FIG. 4).

Further, the control unit 162 controls the communication path switch 1
The channel used by PS19-1 of the local CS 17-1 at 61 and the channel used by PS19-2 of the local CS 17-2 are connected (step A31 in FIG. 4). The extension call is established by the procedure so far.

When the PS 19-1 ends the call, it transmits a disconnection message (step A32 in FIG. 4). The disconnection message is sent from the local CS 17-1 to the control unit 162 and the local CS 17
-2 and PS19-2 (steps A33 to A35 in FIG. 4), and the control unit 162 determines the channel used by the PS19-1 of the local CS17-1 of the communication path switch 161 and the local CS17-2. The connection of the channel used by PS19-2 is disconnected.

Next, release and release completion messages are transmitted and received independently of each of the calling side and the called side (step A36 in FIG. 4).
-A39, A40-A43), PS19-1 and premises CS
The radio channel disconnection and the radio channel disconnection completion message are transmitted and received between the PS 17-1 and the PS 19-2 and the local CS 17-2 (steps A44, A45, A in FIG. 4).
46, A47), the call disconnection is completed. The operation of this extension call is the same as that of the conventional private PHS system, except that a private identifier is added to the layer 3 message.

Next, referring to FIG. 1 and FIG.
The operation when one PS 19 located in the area of No. 17 calls the public PHS network 12 in the public mode will be described. P
In step S19, the public mode is selected by an operation on the PS, and the public network 1 is selected.
After dialing the telephone number 1 and performing a call completion operation such as pressing a talk button, a link channel establishment request message using the public CS-ID as a destination identification code is transmitted to the local CS 17 (step B1 in FIG. 5). . The local CS 17 performs carrier sense in the same manner as in the case of the above-described extension call, transmits a link channel assignment message to the PS 19 (step B2 in FIG. 5), and establishes a layer 1 and layer 2 link on the call channel. (Step B in FIG. 5)
3) Since the destination identification code included in the link channel establishment request message is the public CS-ID, it recognizes that this call is a call in the public mode.

When the synchronization between the layers 1 and 2 is established, the PS 19 transmits a call setup message to the local CS 17 (step B4 in FIG. 5). The local CS 17 receiving the call setup message adds an identifier indicating that the message is in the public mode, and transmits the message to the control unit 162 in the private branch exchange 16 in FIG. 1 (step B5 in FIG. 5). The addition of this identifier is performed by the local CS 17 and the control unit 16 thereafter.
2 is performed for all transmission and reception of the layer 3 message.

Control unit 162 receiving the call setup message
Adds the PS-ID of the PS 19 to the call setup message and sends it to the relay CS 18 (step B6 in FIG. 5). The relay CS 18 having received the call setup message uses the PS-ID added to the call setup message to the public CS 13.
Sends a link channel establishment request message to the
Step B7). The public CS 13 transmits the channel selected by carrier sensing to the relay CS 18 in a link channel assignment message (step B8 in FIG. 5), and establishes a layer 1 and layer 2 link on the communication channel (step in FIG. 5). B9).

When the layer 1 and the layer 2 are established, the relay CS 18 transmits a call setup message from which the PS-ID has been removed to the public CS 13 (step B1 in FIG. 5).
0). The public CS 13 transmits a call setting acceptance message (step B11 in FIG. 5), and this message is
It is transferred to the 18-control unit 162-the local CS 17-PS 19 (steps B12 to B14 in FIG. 5). The subsequent Layer 3 messages are transparently transferred between the PS 19 and the public CS 13, and although there is a conversion between the private and public protocols, it is logically as if the PS 19 and the public CS 13 were used.
Transmit and receive a layer 3 message as if they were communicating directly.

Subsequently, an authentication procedure is performed in the public PHS network 12 (step B15 in FIG. 5).
When the validity of the call is confirmed, the public PHS network 12 causes the other PHS machine in the network to sound a ringing sound, and relays the calling message to the relay CS18-control unit 162-local CS17-P
The transfer is performed in the order of S19 (steps B16 to B1 in FIG. 5).
9). Further, when receiving the above-mentioned call message from the relay CS 18, the control unit 162 determines the channel used by the PS 19 of the local CS 17 of the communication path switch 161 and the channel used by the relay CS 18 for communication with the public CS 13. Connecting.

Further, the control unit 162
1 ringback tone (RB)
T) The channel is connected to the channel used by the PS 19 of the local CS 17, and an RBT is transmitted to the PS 19 (step B20 in FIG. 5). The partner PHS of the public PHS network 12
When the device performs a response operation, the response message is sent to the public CS13.
-Relay CS18-Control unit 162-Local CS17-PS1
9 (steps B21 to B24 in FIG. 5).

A response acknowledgment message for this response message is transferred from the PS 19 to the local CS 17-control unit 162-relay CS 18-public CS 13 (steps B25 to B28 in FIG. 5). Thereafter, a call is established (FIG. 5).
Step B29). After that, when the PS 19 ends the call and transmits a disconnect message (step B30 in FIG. 5), the disconnect message is transmitted to the local CS 17-control unit 162-relay C
S18—Transferred to the public CS13 (Step B in FIG. 5)
31-B33).

The subsequent release / release completion message is PS
19 and the public CS 13 are transmitted transparently, and are logically transmitted and received as if the PS 19 and the public CS 13 are directly communicating (steps B34 to B34 in FIG. 5).
B41). Then, the wireless channel disconnection and the wireless channel disconnection completion message are transmitted and received between the public CS 13 and the relay CS 18 and between the PS 19 and the local CS 17 (steps B42 to B45 in FIG. 5), and the call disconnection is completed. .

Next, the public PHS network 1 will be described with reference to FIGS.
One PS located in the area of CS 17 from a certain premises
The operation when a call is received in the public mode is described at 19.

When the public PHS network 13 receives a call, the public CS
13 transmits an incoming call message including the telephone number of the destination PS to the relay CS 18 (step C1 in FIG. 6). The relay CS 18 having received the incoming message transfers the received incoming message to the control unit 162 in the private branch exchange 16 (step C2 in FIG. 6). Thereby, the control unit 162
Refers to the PS database 1621 and checks whether the PS is located in the area of the premises CS17.

If the control unit 162 determines that it is present, it adds an identifier indicating the public mode to the received incoming call message and transmits the message to the local CS 17 (step C3 in FIG. 6). If not, do nothing. The local CS 17 that has received the incoming call message transmits an incoming call signal using the public CS-ID as a calling identification code to the PS 19 at the transmission timing of the public control signal (step C4 in FIG. 6).

The PS 19 that has received the incoming call signal transmits a link channel establishment request message to the local CS 17 (step C5 in FIG. 6). The local CS 17 performs carrier sense, selects an empty channel, and transmits a link channel assignment message to the PS 19 (step C6 in FIG. 6).
The layer 1 and layer 2 links are established on the traffic channel (step C7 in FIG. 6). When the layer 1 and the layer 2 are established, the PS 19 transmits an incoming call response message to the local CS 17 (Step C8 in FIG. 6). The incoming call response message is transferred from the local CS 17 to the control unit 162 and the relay CS 18 (steps C9 and C1 in FIG. 6).
0).

When receiving the call response message, the relay CS 18 transmits a link channel establishment request message to the public CS 13 (step C11 in FIG. 6). Public CS1
3 carries out carrier sense, selects a vacant channel, transmits a link channel assignment message to the relay CS 18 (step C12 in FIG. 6), and then establishes Layer 1 and Layer 2 links on the traffic channel (FIG. 6). Step C of
13). When Layer 1 and Layer 2 are established, relay C
S18 transmits an incoming call response message to the public CS 13 (step C14 in FIG. 6).

The subsequent layer 3 messages are transmitted to the PS 19 and the public CS in the same manner as the above-mentioned call to the public PHS network 12.
The call is transmitted transparently between the communication terminals 13 and the call is established and terminated by transmitting and receiving an authentication procedure, a call, a response, a response confirmation, a disconnection, a release and a release completion message. In addition, when the control unit 162 receives the calling message from the local CS 17, the control unit 162 sets the PS of the local CS 17 of the communication path switch unit 161.
19 used channels and relay CS 18 public CS
13 is connected to the channel used for communication, and the communication channel is disconnected when a disconnection message is received.

As described above, according to this embodiment, P
S19 can, of course, access another PS19 in the same business establishment 15, and can also access the public PHS from anywhere in the business establishment 15 outside the service area 131 of the public CS13 or within the area of the premises CS17.
The network 12 can be directly accessed.

The present invention is not limited to the above embodiment. For example, in the above embodiment, in the case of an incoming call from the public PHS network 12, an incoming call message is transmitted to the control unit 162. The control unit 162 refers to the PS database 1621 to determine whether or not the call is to the PS 19 in its own system.
18 from the PS database 1621,
By notifying only the public telephone number information of S, the relay CS 18 may determine whether or not the call is to the PS 19 in the own system.

In this case, although the amount of memory required for the relay CS 18 increases, whether to respond to an incoming call is determined not by the control unit 162 but by the relay CS 18, so that the load on the control unit 162 can be reduced. Becomes possible.

Further, when the business office 15 is located at a place where the radio waves of the plurality of public CSs 13 can be received, the line capacity with the public network 12 can be increased by installing a plurality of relay CSs 18.

The PS-ID used by the relay CS 18 between the relay CS 18 and the public CS 13 is the PS-ID of the PS 19.
Although the -ID is transferred from the control unit 162 to the relay CS 18 and used, the number of PS-IDs equal to the maximum number of simultaneous calls (three in the present embodiment) is individually assigned to the relay CS 18 in advance. Alternatively, a method using the assigned PS-ID is also possible.

[0081]

As described above, according to the present invention,
Even if the mobile station is out of the service area of the public wireless base station and is located in the area of the private wireless base station, the mobile station is located in the private wireless base station, the private branch exchange, and the relay wireless base station. Communication between the mobile station and the public network can be made directly from the mobile station from anywhere in the premises within the area of the local wireless base station. Therefore, since the public wireless base station is set to perform wireless communication with the public PHS network, direct calls can be made from the private mobile device to the public PHS network.

Further, according to the present invention, since the mobile station in the premises and the public PHS network are wirelessly connected using the relay radio base station, individual negotiations and wiring work with the public PHS operator are performed. Is unnecessary, so that a wireless communication system can be easily and inexpensively constructed.

Further, according to the present invention, the relay radio base station includes one transceiver and two synthesizers for frequency setting, and performs simultaneous transmission and reception of four slots.
Since two or three calls can be made at the same time, the line capacity can be doubled or tripled as compared with the conventional relay device.

Further, according to the present invention, since a system for a private branch exchange is constructed, the number of mobile units that can be registered can be made larger than that of a conventional relay device, and the number of mobile units that can be registered in a larger office is increased. A sufficient number of mobile units can be secured for use.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of a wireless private branch exchange and a wireless communication system according to the present invention.

FIG. 2 is a timing chart of transmission and reception of control signals between the local premises CS and PS in FIG. 1;

FIG. 3 is a transmission / reception timing chart of a communication signal of the entire system of FIG. 1;

FIG. 4 shows one PS located in the area of the local CS in FIG. 1;
FIG. 7 is a sequence diagram in a case where a PS located in another premises CS is called from the premises in a premises mode.

FIG. 5 shows one PS located in the area of the premises CS in FIG. 1;
FIG. 6 is a sequence diagram when a public PHS network is called from a public mode in a public mode.

FIG. 6 is a sequence diagram in a case where a call is received in the public mode from the public PHS network of FIG. 1 to one PS located in the area of the local CS.

FIG. 7 is a configuration diagram of an example of a conventional wireless private branch exchange and a wireless communication system.

FIG. 8 is a block diagram of an example of a relay device in FIG. 7;

9 is an example of transmission / reception timing of a public CS, a relay device, and a PS in FIG. 7;

FIG. 10 is another example of the transmission / reception timing of the public CS, the relay device, and the PS in FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Public network 12 Public PHS network 13 Public wireless base station (public CS) 14 Public line 15 Office 16 Private branch exchange 17 Private wireless base station (local CS) 18 Relay wireless base station (relay CS) 19 Mobile station (PS) 131 Public CS service area 161 Call path switch 162 Control unit 163 Tone generation circuit 1621 PS database

────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 13, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

2. A service area for at least one premises radio base station installed on the premises and a public radio base station outside the premises, and
It is installed in the premises, for premises and capable of wireless communication one or more relay base station, the more one of wireless communication with the local radio base station between the public radio base station Mobile station and the area of the local wireless base station from the internal database.
(A) only the public telephone number of the premises mobile device located in
To the relay radio base station and
Communication channel between a radio base station and the relay radio base station
Setting / connection and when there are multiple local wireless base stations
Sets and disconnects the communication channel between the local wireless base stations.
And a Cormorant private branch exchange, the private radio base station, communication between the PBX and the relay radio base station and the mobile station via the public radio base station, and the local radio base station and the private branch exchange A wireless communication system for performing communication between the mobile devices via a mobile terminal.

3. A premises for a premises including different CS-IDs.
Control signals and public control signals for public access
It is set up on campus to transmit alternately at each intermittent transmission timing.
Within the service area of one or more premises radio base stations installed and a public radio base station outside the premises , and
Installed on the premises and between the public wireless base station
One or more relay wireless base stations capable of wireless communication with one or more wireless base stations, and one or more wireless base stations that wirelessly communicate with the local wireless base station.
A call between an internal mobile device and the private wireless base station and the relay wireless base station
Channel setting / connection and multiple local wireless base stations
In some cases, setting up a communication channel between the local wireless base stations
A private branch exchange that performs disconnection, the private wireless base station,
In front of the mobile station via a private branch exchange and a relay radio base station
Communication with the public wireless base station and the private radio
A wireless communication system for performing communication between a mobile station and a base station via a private branch exchange .

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction contents]

[0024]

In order to achieve the above object, a private branch exchange according to the present invention is provided with a communication channel for one or more private radio base stations installed on the premises and a public radio base station outside the premises. A communication path switch for connecting and disconnecting between channels including at least a connection with a communication channel of one or more relay radio base stations installed in the service area and on the premises, and the communication channel is connected to the communication path switch And a tone generation circuit for generating various tones, and at least an extension number of a mobile terminal for the premises, a public telephone number, an authentication key, and location registration information for wireless communication between the premises radio base station. Database and inside the database
Mobile station for campus located in the area of the radio base station from
Notify only the public telephone number of
Control channels of the local radio base station and the relay radio base station.
Connected to send and receive control signals,
Connection between channels of the speech path switch based on the
A control unit for performing disconnection control, wherein a mobile station for a premises located in an area of an arbitrary premises radio base station among premises radio base stations installed on the premises and a public radio base station. Is performed through the relay wireless base station.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0025

[Correction method] Change

[Correction contents]

In order to achieve the above object, a wireless communication system according to the present invention is provided in a service area of at least one premises wireless base station installed on the premises and a public wireless base station outside the premises, and It is installed on the premises, and one or more relay radio base stations capable of wireless communication between said public radio base station, for premises least one of radio communication with the local radio base station Mobile premises and campus from internal database
Public mobile devices for premises located in the area of wireless base stations
Notifying the relay wireless base station of only the telephone number,
Communication channel between the local radio base station and the relay radio base station
Setting / connection and when there are multiple local wireless base stations,
A structure for setting and disconnecting a communication channel between local wireless base stations
And a inner exchange, private radio base station, the private branch exchange and the relay communication with the radio base station via the mobile station and the public radio base station, and the mobile station through the private radio base station and the private branch exchange The communication between them is performed.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0029

[Correction method] Deleted

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0030

[Correction method] Change

[Correction contents]

In the present invention, the private branch exchange is
Since only the public telephone number of the mobile station for the premises located in the area of the local radio base station is notified to the relay radio base station from the internal database, the load on the control unit inside the private branch exchange is reduced. Can be reduced .

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction contents]

Further, in the present invention, the private radio base station alternately transmits a private control signal and a public control signal for public access at the respective intermittent transmission timings, and also controls the private control signal and the public control signal. Since the control signals include different CS-IDs, the control for the premises is
Control signal or public control signal.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04B 7/26 109G

Claims (6)

[Claims] 1. A communication channel of one or more premises radio base stations installed in a premises, and one or more relay radio stations installed in the service area of a public radio base station outside the premises and installed in the premises. A communication path switch for performing connection and disconnection between channels including at least a connection with a communication channel of the base station; and a communication channel connected to the communication path switch,
A tone generation circuit that generates various tones, and the control channels of the local radio base station and the relay radio base station are connected to transmit and receive control signals, and between the channels of the communication path switch based on the control signals. A control unit that performs connection / disconnection control; and a database that stores at least an extension number, a public telephone number, an authentication key, and location registration information of a premises mobile device that wirelessly communicates with the premises radio base station. And
The relay wireless communication between the mobile station for premises and the public wireless base station located in the area of any local wireless base station among the local wireless base stations installed on the premises. A wireless private branch exchange characterized by being performed via a base station. 2. The relay unit according to claim 2, wherein the control unit notifies the relay wireless base station only of a public telephone number of the private mobile station located in the area of the private wireless base station from the database. The wireless private branch exchange according to claim 1, wherein: 3. Within a service area of one or more premises radio base stations installed on the premises and a public radio base station outside the premises, and
One or more relay wireless base stations installed in the premises and capable of wireless communication with the public wireless base station; and a communication channel between the local wireless base station and the relay wireless base station. When there are a plurality of local radio base stations, the setting and connection of a communication channel between the local radio base stations.
A private branch exchange that performs disconnection, and one or more private mobile units that perform wireless communication between the private wireless base station and the private wireless base station, the private branch exchange, and a relay wireless base station. A wireless communication system for performing communication between a mobile device and the public wireless base station and communication between the mobile device via the private wireless base station and a private branch exchange. 4. The wireless communication system according to claim 3, wherein said relay wireless base station includes one transceiver and two synthesizers for frequency setting, and performs simultaneous transmission and reception of four slots. 5. The private branch exchange notifies the relay wireless base station of only the public telephone number of the private mobile station located in the area of the private wireless base station from an internal database. The wireless communication system according to claim 3, wherein: 6. The private radio base station alternately transmits a private control signal and a public control signal for public access at respective intermittent transmission timings, and further comprises the private control signal and the public control signal. Are different CS-IDs
4. The wireless communication system according to claim 3, comprising: