JP2001352571A - Mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the mobile communication system of a low cost by reducing the number of using lines between the public exchange and a repeater and suppressing capital investment for system construction. SOLUTION: This system is constituted of plural mobile stations 50, plural radio base stations 40, the repeater 20 and the public exchange 30. A repeater station 20 is provided with a CPU 21 operated by program control, a memory 22 for storing a caller number inside an originating call setting message from an originating mobile station and a collated result and a TDSW 23 for connecting a speech path between the public exchange and the radio base station by the control of the CPU 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a mobile communication system,
In particular, the present invention relates to a mobile communication system that performs communication using a portable mobile terminal such as a PHS (Personal Handy-phone System).

[0002]

2. Description of the Related Art A conventional example of this type of mobile communication system is as follows.
For example, it is disclosed in "Mobile Communication System and Base Station" of Japanese Patent Application Laid-Open No. 8-237736. This conventional mobile communication system and base station are composed of a base station 1, a mobile terminal 2 and an exchange 3, as shown in FIG. The base station 1 includes an antenna 4, a duplexer 5, a transmitting unit 6, a receiving unit 7, time-division processing units 8, 9, a conversion processing unit 1.
0, interface unit 11, switching unit 12, exchange processing unit 1
3, a control unit 14 and a registration memory 15 are included.

[0003] In other words, this mobile communication system has a switching system 3
Is a communication system in which a mobile terminal 2 communicates via a base station 1 connected to the mobile terminal 2. The registration memory 15 of the base station 1
The mobile terminal 2 existing in the area is registered. The exchange processing unit 13 performs exchange connection. The control unit 14 controls the switching processing unit 13 so as to connect a communication path between the calling mobile terminal and the called mobile terminal in the area.

[0004] The operation of the conventional mobile communication system and base station having such a configuration is as follows. That is,
A location registration request from the mobile terminal 2 is sent to a higher system management station (not shown) and registered in the registration memory 15. When the calling mobile terminal and the called mobile terminal in the area of the base station 2 are registered in the registration memory 15,
A call path between the calling mobile terminal and the called mobile terminal is connected. Alternatively, a specific mobile terminal 2 is stored in the registration memory 1 in advance.
5, and searches the registration memory 15 in response to a position registration request of the mobile terminal 2 from within the area of the base station 1.
For a location registration request from a specific mobile terminal 2, a flag indicating presence in the area of the base station 1 is set, so that a call from the mobile terminal 2 within the area of the base station 1 can be registered in the registration memory 15. Search for. When the flag for the called mobile terminal or the flag for both the calling mobile terminal and the called mobile terminal is set in the registration memory 15, the flag between the calling mobile terminal and the called mobile terminal is set. Is connected, the processing load on the exchange 3 is reduced.

[0005]

The problem of the prior art described above is that the registration memory of the mobile terminal or the area in the base station area which is referred to when connecting the calling mobile terminal and the called mobile terminal. The setting of the flag indicating the presence of a request requires a location registration request from the mobile terminal. That is, each time the mobile terminal moves into the area of the base station, it is necessary to send a location registration request, so that it is necessary to set a different paging area for each base station. Therefore, each time the mobile terminal moves between base stations, a location registration request is sent to the upper system management station. This is enormous when considering a public mobile communication system in which an unspecified number of mobile terminals may exist in the area of the base station, especially in a public PHS where the area covered by the base station is small. Number of location registration requests will be sent. Therefore, the load on the transmitting base station also increases, and the load on the public exchange and the system management station that receive the location registration request also increases. Also, when the mobile terminal moves out of the base station area, the base station has no means for detecting the movement of the mobile station outside the area. Some means of clearing the registration is required.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a relay apparatus which can control a plurality of radio base stations under control of a relay apparatus which controls communication between mobile stations in a radio area formed by the subordinate radio base stations. A mobile communication system capable of:

[0007]

SUMMARY OF THE INVENTION A mobile communication system according to the present invention comprises a plurality of mobile stations, a plurality of radio base stations having a radio area for service of these mobile stations, a relay device connected to these radio base stations, and A public exchange, wherein the relay device is a CP that operates under program control.
U, a memory for storing a caller ID and a collation result in an outgoing call setting message from a calling mobile station, and a TDSW for connecting a communication path between a public exchange and a radio base station under the control of a CPU. Are connected by a relay device.

[0008] According to a preferred embodiment of the mobile communication system of the present invention, the CPU of the relay device includes a collating unit for collating the caller number stored in the memory with the caller call in the incoming call setting message; Reading means for reading the collation result of the collation means when a response corresponding to the setting message is received from a subordinate radio base station; and TD when the collation results match.
A connection means for controlling the SW and connecting the communication path is configured.
The CPU constitutes a sending means for sending a disconnection message to the public exchange when the calling path is connected by the connecting means. When the repeater connects the communication channel of the receiving base station and the communication channel of the receiving base station, the sending means sends a disconnection signal to the public exchange with the call number of the calling call. The mobile station and the radio base station are a PHS communication system.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration and operation of a preferred embodiment of a mobile communication system according to the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing the configuration of a preferred embodiment of a mobile communication system according to the present invention. This mobile communication system includes a relay device 20, a public exchange 3
0, a plurality of radio base stations 40a to 40n (hereinafter, these radio base stations are collectively referred to by reference numeral 40) and a plurality of mobile stations 50a to 50n communicating with the plurality of radio base stations 40 (hereinafter, collectively referred to as "base stations"). In some cases, reference numeral 50 is used. The relay device 20 has a CP
U (central processing unit) 21, memory 22, and TDS
W23.

[0011] The relay device 20 and the public exchange 30 are connected by an I 'or T1 / E1 interface for public PHS. The relay device 20 and the wireless base station 40 are connected by an I ′ interface or a unique interface. Also,
The wireless base station 40 and the mobile station 50 are connected by a public PHS wireless interface. CPU 2 of relay device 20
1 operates under program control. The memory 22
It stores the caller number in the "call setup message" from the calling mobile station 50 and the collation result of the memory 22 with the caller number in the "call setup message" from the public exchange 30. The TDSW 23 connects a communication path between the public exchange 30 and the wireless base station 40 under the control of the CPU 21.

The CPU 21 of the relay device 20 constitutes the following various means. That is, the originating mobile station 5 is stored in the memory 22.
Storage means 21A for storing the caller number in the "call setting message" from 0. Collating means 21B for collating the caller number in the "incoming call setting message" with the caller number stored in storage means 21A. This matching means 21B
Storage means 21C for storing in the memory 22 the result of the comparison. Radio base station 4 under the control of the response to the incoming call setting message
A reading unit 21D for reading out the collation result from the storage unit 21C from the memory 22 when it is 0; This reading means 2
If the result of the caller ID collation read by 1D is the same, the TDSW 23 is controlled to connect the communication path between the radio base station 40 where the calling mobile station 50 is present and the radio base station 40 where the called mobile station 50 is present. Connection means 21E. When the communication path of the radio base station 40 where the originating mobile station 50 exists and the radio base station 40 where the destination mobile station 50 exists is connected by the relay device 20 by the connecting means 21E, the call of the originating mobile station is sent to the public exchange 30. Sending means 21F for sending a disconnection message to the user.

Each of these means 21A to 21F generally operates as follows. The mobile station 50a is the radio base station 4
When a call is transmitted from the radio area 0a to the mobile station 50n existing in the radio area of the radio base station 40n, the originating mobile station 50a, the terminating mobile station 50n and the public exchange 3
2, the call control message sequence shown in FIG. 2 is normally performed via the radio base stations 40a and 40n and the relay device 20. When receiving the "call setup message" from the calling mobile station 50a, the relay device 20 transfers the call to the memory 22 by the storage means 21A for storing the caller number in the "call setup message" from the calling mobile station 50a. The caller number of the station 50a is stored. afterwards,
The "outgoing call setup message" is relayed to the public exchange 30. On the other hand, the public exchange 30 has the terminating mobile station 50.
n to the relay device 20.

Next, the relay device 20 that has received the "terminated call setting message" for the terminating mobile station 50n stores the caller number in the "terminated call setting message" for the terminating mobile station 50n in the memory 22 by the storage means 21A. The collating unit 21B performs collation of the transmitted caller number, reads the collation result by the reading unit 21D, stores the collation result in the memory 22, and then sends the “incoming call setting message” for the terminating mobile station 50n to the subordinate radio base station 40. Send out. The "response message" from the terminating mobile station 50n is transmitted to the radio base station 40.
When the relay apparatus 20 receives the caller number via n, the relay apparatus 20 reads the collation result of the stored caller number from the memory 22 by the reading unit 21F. If the collation results match, the originating mobile station 50a and the terminating mobile station 50n
When it is determined that the mobile station is present in the wireless area of the wireless base stations 40a and 40n under the control of the base station 0, the "response message" from the terminating mobile station 50n is not relayed to the public exchange 30 via the wireless base station 40a. It is transmitted to the originating mobile station 40a. After that, the TDSW 23 is controlled by the connection means 21E, and the communication path between the radio base station 40a and the radio base station 40n is connected so that the originating mobile station 50a and the terminating mobile station 50n are in a communication state.

Since the call path of the originating mobile station 50a and the terminating mobile station 50n is connected by the relay device 20, the "opening operation of the call" on the side of the public exchange 30 continues as the originating mobile station by the connecting means 21E. The communication path between the terminal 50a and the terminating mobile station 50n is connected. Thereafter, the sending means 21F sends to the public exchange 30 a "disconnection message" to which the same call number as used when relaying the "call setup message" from the originating mobile station 50a to the public exchange 30 is added. . As a result, the public exchange 30 sends the originating mobile station 50a.
And release the call of the terminating mobile station 50n. FIG. 3 shows a call control sequence in the case where the originating mobile station 50a and the terminating mobile station 50n are present in a wireless area formed by the wireless base station 40 under the relay device 20 and connect a communication path within the relay device 20. Show. FIG. 3 shows an operation sequence among the originating mobile station 50a, the terminating mobile station 50n, the originating radio base station 40a, the terminating base station 40n, the relay device 20, and the public exchange 30. However, FIG. 3 is sufficiently clear to a person skilled in the art, so that a detailed description is omitted.

Next, the overall operation of the mobile communication system according to the present invention will be described in detail with reference to the block diagram of FIG. 1 and the flowcharts of FIGS. First, a description will be given with reference to FIG. When the mobile station 50a originates a call from the radio area of the radio base station 40a to the mobile station 50n existing in the radio area of the radio base station 40n, the originating mobile station 50a, the terminating mobile station 50n, and the public exchange 30 2, the “call control message sequence” shown in FIG. 2 is normally performed via the radio base stations 40 a and 40 n and the relay device 20. The relay device 20 includes the originating mobile station 50
Receives "call setup message" from a (step A1)
Then, the caller number in the "outgoing call setting message" is read (step A2). Then, the caller number of the calling mobile station 50a is stored in the memory 22 by the storage means 21A (step A3), and the "call setting message" is relayed to the public exchange 30 (step A4).

Next, a description will be given with reference to FIG. The public exchange 30 sends an “incoming call setup message” for the terminating mobile station 50 n to the relay device 20. The relay device 20
An "incoming call setup message" for the incoming mobile station 50n is received (step B1). Next, the caller number in the "incoming call setting message" is read (step B2). C
The collation unit 21B compares the caller number in the “incoming call setting message” read by the storage unit 21A in the PU 21 with the caller number stored in the memory 22 (step B3). This collation result is read out by the reading means 21D.
Is stored in the memory 22 (step B4). Thereafter, it relays the "incoming call setup message" for the incoming mobile station 50n and sends it out to the subordinate radio base station 50 (step B5).

Further description will be made with reference to FIG. The "response message" from the terminating mobile station 50n is transmitted to the radio base station 40.
Then, the relay apparatus 20 receives the received data via the n (step C1).
Then, the relay device 20 reads the collation result of the caller ID stored in the storage unit 21C from the memory 22 by the reading unit 21D (step C2), and determines whether the read results match (step C3). When the collation results match, it is determined that the originating mobile station 50a and the terminating mobile station 50n are present in the wireless area of the wireless base stations 50a and 50n under the relay device 20 (step C3: Y
ES), instead of relaying the "response message" from the terminating mobile station 50n to the public exchange 30, the "response message" is sent to the radio base station 40a where the originating mobile station 50a exists (step C4). . Next, TDSW23
To connect the communication path between the transmitting-side wireless base station 40a and the receiving-side wireless base station 40n by the connecting means 21E in the CPU 21 (step C5). As a result, the originating mobile station 50a and the terminating mobile station 50n are brought into a talking state.

Next, a "disconnection message" to which the same call number as used when relaying the "call setup message" from the originating mobile station 50a to the public exchange 12 is added by the sending means 21F in the CPU 21. It is sent to the public exchange 30 (step C6). As a result, the public exchange 3
Release the 0 call. If the collation results do not match (step C3: NO), the "response message" from the terminating mobile station 50n is relayed to the public exchange 30 (step C7).

As is clear from the above description, in this embodiment, when a call is transmitted from a mobile station 50 located in the wireless area of the wireless base station 40 under the relay device 20, a radio base station under the same relay device 20 is transmitted. When there is an incoming call from a mobile station existing in the wireless area of the station 40, the caller number in the "outgoing call setting message" from the calling mobile station 50a and the "incoming call setting message" from the public exchange 30 in response thereto. When the caller IDs in "" match, the public telephone exchange 30 conventionally connects the communication path, but in this specific embodiment, the communication path can be connected in the relay device 20. As a result, the communication channel between the relay device 20 and the public exchange 30 can be reduced, and the use efficiency of the public exchange 30 can be improved.

Next, a more detailed description will be given using a specific example of the embodiment of the mobile communication system according to the present invention described above.
In FIG. 1, when the mobile station 50a makes a call from the radio area of the radio base station 40a to the mobile station 50n existing in the radio area of the radio base station 40n, as shown in the sequence diagram of FIG. The station 50a is a wireless base station 4
0a to the relay device 20 via the "outgoing call setting message"
Is sent. Therefore, the relay device 20 is connected to the originating mobile station 50.
When the "call setting message" from the calling mobile station 50a is received, the storage means 21A in the CPU 21 stores the caller number in the "call setting message" from the calling mobile station 50a.
The caller number of the calling mobile station 50a is stored in the memory 22.

It is assumed that the caller number of the calling mobile station 50a is, for example, "07050000141". For example, as shown in FIG. 7, the "call number of the outgoing call setting message" is sequentially stored in the memory 22 in the relay device 20. Thereafter, the "outgoing call setting message" is relayed to the public exchange 30. On the other hand, the public exchange 30 has the
0n to the relay device 20
To send to. The relay device 20 that has received the "terminated call setting message" for the terminating mobile station 50n stores the caller number and memory 22 in the "terminated call setting message" for the terminating mobile station 50b in FIG. The stored caller number is collated as shown.
The collation result is stored in the memory 2 by the storage means 21C.
After storing in FIG. 2 as shown in FIG. 8, the “terminating call setting message” for the terminating mobile station 50 n is transmitted to the subordinate radio base station 40.
To send to.

Next, a case will be described in which the relay device 20 receives a "response message" from the terminating mobile station 50n via the radio base station 40n. The relay device 20 includes the reading unit 2
The collation result of the caller number stored in the storage unit 21C is read from the memory 22 by 1D. When the collation results match and it is determined that the originating mobile station 50a and the terminating mobile station 50n are present in the radio area of the radio base stations 40a and 40n under the relay device 20, the terminating mobile station 50n
Is transmitted to the originating mobile station 50a via the radio base station 40a, as shown in the sequence diagram of FIG. After that, the TDSW 23 is transmitted by the transmitting means 21F in the CPU 21.
Control. Then, the communication path between the radio base station 50a and the radio base station 40n is connected by the connection means 21E in the CPU 21, and the originating mobile station 50a and the terminating mobile station 50n are set in a communication state.

[0024] As a "call release operation" on the side of the public exchange 30 which is continued because the communication path between the originating mobile station 50a and the terminating mobile station 50n is connected by the relay device 20, the originating mobile station is connected by the connecting means 21E. 50a and terminating mobile station 50n
Connect the call path of. Thereafter, as shown in the sequence diagram of FIG. 3, the same call number used when the "call setting message" from the originating mobile station 50a is relayed to the public exchange 30 by the sending means 21F in the CPU 21 is stored in the memory 22. The read and added "disconnection message" is sent to the public exchange 30. As a result, the public exchange 3
0 performs "release of call" between the originating mobile station 50a and the terminating mobile station 50n.

The configuration and operation of the preferred embodiment of the mobile communication system according to the present invention have been described above in detail. However, such an embodiment is merely an example of the present invention and does not limit the present invention in any way. It will be readily apparent to those skilled in the art that various modifications can be made in accordance with the particular application without departing from the spirit of the invention.

[0026]

As is apparent from the above description, the mobile communication system according to the present invention has the following practically significant effects. First, the number of lines used between the public exchange and the relay device can be reduced. The reason is that, for a call between mobile stations located in a wireless area formed by a wireless base station subordinate to the relay device, a communication path is connected by the relay device without using a public exchange.

Further, when the relay device and the radio base station are installed as private branch exchanges, private communication can be performed without registering an extension. Also, since the number management of mobile stations is performed on the public exchange side, there is no limit on the number of mobile stations that can be used. The reason is that the calling party number in the “calling setup message” and the calling party number in the “incoming call setup message” are collated, and if they match, the relay device connects the calling mobile station and the called mobile station. Because you do.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a preferred embodiment of a mobile communication system according to the present invention.

FIG. 2 is a sequence diagram showing a “call control message sequence” of the mobile communication system shown in FIG.

FIG. 3 is a sequence diagram showing a “call control sequence” of the mobile communication system shown in FIG.

FIG. 4 is a flowchart showing an “outgoing call setup message receiving operation” from a calling mobile station in the mobile communication system shown in FIG. 1;

FIG. 5 is a flowchart showing an “incoming call setup message receiving operation” from the switching mobile station in the mobile communication system shown in FIG. 1;

FIG. 6 is a flowchart showing a “response message receiving operation” from a terminating mobile station in the mobile communication system shown in FIG. 1;

7 is a diagram showing an example of contents of a memory for storing a caller number in the mobile communication system shown in FIG.

8 is a diagram showing an example of the contents of a memory for storing a result of collating a caller number in the mobile communication system shown in FIG.

FIG. 9 is a block diagram showing a configuration of a conventional mobile communication system.

[Explanation of symbols]

 Reference Signs List 20 relay device 21 CPU (central processing unit) 22 memory 23 TDSW 30 public exchange 40a-40n radio base station 50a-50n mobile station

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) H04Q 3/60 F term (Reference) 5K049 AA01 BB00 CC03 CC04 CC11 DD04 FF01 FF11 FF12 FF16 FF32 HH01 5K051 AA03 BB01 CC01 CC04 CC07 DD01 DD02 DD06 DD07 DD13 DD15 EE01 EE02 HH12 HH13 HH14 HH15 HH18 HH19 HH26 5K067 AA42 BB04 DD17 DD26 EE02 EE10 EE16 HH11 HH22 HH23

Claims (5)

[Claims] 1. A mobile communication system comprising: a plurality of mobile stations; a plurality of radio base stations each having a radio area serving the mobile station; a relay device connected to the radio base stations; and a public exchange. The relay device is a CP operating under program control.
U, a memory for storing a caller number and a reference result in an outgoing call setting message from a calling mobile station, and the CPU
A TDSW for connecting a communication path between the public exchange and the radio base station under the control of the mobile station. A call between the mobile stations located in a radio area formed by each of the radio base stations is communicated by the relay device. A mobile communication system, characterized in that: 2. The relay apparatus according to claim 1, wherein said CPU checks said caller number stored in said memory against a caller number in an incoming call setting message, and said base station responds to said incoming call setting message. 2. A reading means according to claim 1, wherein said reading means reads out the result of the comparison by said collating means when it is from a station, and said connecting means connects said communication path by controlling said TDSW when said collation results match. Mobile communication system. 3. A transmission means for transmitting a disconnection message to the public exchange when a call from an originating mobile station is transmitted to the public exchange when the connection is established by the connection means. 3. The mobile communication system according to 2. 4. When the repeater connects the communication channel of the receiving base station and the communication channel of the receiving base station, the transmitting means sends a disconnection signal to the public exchange with the call number of the calling call. The mobile communication system according to claim 3, wherein 5. The mobile station and the radio base station, wherein Pers
The mobile communication system according to any one of claims 1 to 4, wherein the mobile communication system is an onal Handy-phone System (PHS) communication system.