WO2022113229A1

WO2022113229A1 - Radio communication system and central station

Info

Publication number: WO2022113229A1
Application number: PCT/JP2020/043969
Authority: WO
Inventors: 健吾勇惣
Original assignee: 三菱電機株式会社
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2022-06-02
Also published as: JPWO2022113229A1

Abstract

This radio communication system comprises a central station (2), multiple base stations (3, 4), and mobile stations (5, 6) each of which communicates with the central station (2) via any of the multiple base stations. The central station (2): obtains service availability information indicating services available to the mobile stations in association with radio methods usable by the respective base stations; determines, on the basis of position registration information transmitted from a mobile station entering a service area of a serving base station among the multiple base stations (3, 4) to the serving base station, a radio method usable for communications between the serving base station and the mobile station entering the service area; and determines a service available to the mobile station entering the service area by referring to the service availability information on the basis of the usable radio method.

Description

Wireless communication system and central station

This disclosure relates to wireless communication systems and central stations.

There is a wireless communication system including a mobile station mounted on a train, a base station installed along the train path and wirelessly communicating with the mobile station, and a central station communicating with the mobile station via the base station. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2014-60668 (page 13, FIG. 1)

However, in the conventional wireless communication system, a single wireless system is used for wireless communication between the mobile station and the base station, and the new base station, which is a base station using the new wireless system, and the conventional one. Mixing with old base stations, which are base stations that use wireless systems, was not considered. Therefore, when the new base station and the old base station coexist, there is a problem that the service that can be provided by the central station and the wireless system are not properly linked.

This disclosure is made to solve the above problems, and an object of the present disclosure is to appropriately link the wireless system used between the mobile station and the base station with the service that can be provided by the central station.

The wireless communication system of the present disclosure includes a central station, a plurality of base stations, and a mobile station that communicates with the central station via any of the plurality of base stations, and the central station includes the plurality of base stations. Corresponding to the wireless system that can be used by each of the above-mentioned base stations, the service provision availability information indicating the services that can be provided to the mobile station is acquired, and the area under the control of any one of the plurality of base stations is obtained. Based on the location registration information transmitted from the mobile station that has entered the mobile station to the base station that has the mobile station under its control, the base station that has the mobile station under its control and the base station that has entered the subordinate area. It is possible to determine the wireless system that can be used for communication with the mobile station, refer to the service provision availability information based on the available wireless system, and provide the service to the mobile station that has entered the subordinate area. Service is confirmed.

The central station of the present disclosure is the central station in a wireless communication system having a central station, a plurality of base stations, and a mobile station that communicates with the central station via any of the plurality of base stations. , Acquires service provision availability information indicating services that can be provided to the mobile station corresponding to the wireless system that can be used by each of the plurality of base stations, and one of the plurality of base stations. Based on the location registration information transmitted from the mobile station that entered the subordinate area of the mobile station to the base station that subordinates the mobile station, the base station that subordinates the mobile station and the subordinate area The wireless system that can be used for communication with the mobile station that has entered is determined, and the mobile station that has entered the subordinate area with reference to the service provision availability information based on the available wireless system. Determine the services that can be provided to.

According to this disclosure, there is an effect that the wireless system used between the mobile station and the base station can be appropriately linked with the service that can be provided by the central station.

It is a figure which shows schematic the structure of the wireless communication system by Embodiment 1. FIG. FIG. 5 is a functional block diagram schematically showing a configuration of a central station of a wireless communication system according to the first embodiment. FIG. 5 is a functional block diagram schematically showing a configuration of a new base station which is a base station of a wireless communication system according to the first embodiment. FIG. 5 is a functional block diagram schematically showing a configuration of an old base station which is a base station of a wireless communication system according to the first embodiment. FIG. 5 is a functional block diagram schematically showing a configuration of a new mobile station which is a mobile station of a wireless communication system according to the first embodiment. FIG. 5 is a functional block diagram schematically showing a configuration of an old mobile station which is a mobile station of a wireless communication system according to the first embodiment. It is a figure which shows the relationship between the digital wireless system and the service which can be provided in the wireless communication system by Embodiment 1. FIG. It is a sequence diagram (the 1) which shows the operation of the wireless communication system by Embodiment 1. FIG. FIG. 2 is a sequence diagram (No. 2) showing the operation of the wireless communication system according to the first embodiment. FIG. 3 is a functional block diagram schematically showing a configuration of a central station of a wireless communication system according to a second embodiment. It is a figure which shows the example of the base station composition table held in the configuration management part of the central station of the wireless communication system by Embodiment 2. FIG. FIG. 3 is a functional block diagram schematically showing a configuration of a new base station which is a base station of a wireless communication system according to the second embodiment. FIG. 3 is a functional block diagram schematically showing a configuration of a new mobile station which is a mobile station of a wireless communication system according to the second embodiment. It is a figure which shows the example of the next base station composition table held in the configuration management part of the new mobile station which is the mobile station of the wireless communication system by Embodiment 2. FIG. It is a sequence diagram which shows the operation which dynamically determines the base station composition of the wireless communication system by Embodiment 2. FIG. It is a sequence diagram (the 1) which shows the operation of the wireless communication system by Embodiment 2. FIG. FIG. 2 is a sequence diagram (No. 2) showing the operation of the wireless communication system according to the second embodiment.

Hereinafter, the wireless communication system and the central station according to the embodiment will be described with reference to the drawings. The wireless communication system is, for example, a train communication system applicable to a train as a mobile body and its management system. The following embodiments are merely examples, and it is possible to appropriately combine the embodiments and change the embodiments as appropriate.

<< 1 >> Embodiment 1
<< 1-1 >> Configuration FIG. 1 is a diagram schematically showing a configuration of a wireless communication system according to the first embodiment. The wireless system A and the wireless system B are digital wireless systems that are different from each other. The digital radio system is, for example, a train radio communication system applicable to a train as a mobile body. The digital wireless system extended in the new system will be referred to as a wireless system (second wireless system) A, and the digital wireless system used from the conventional system will be referred to as a wireless system (first wireless system) B. The wireless system is also referred to as a wireless transmission system. Further, the digital radio system extended in the new system may further include other radio systems for the new system other than the radio system A. That is, the wireless communication system according to the embodiment may include a plurality of wireless systems for the new system.

In the wireless communication system according to the first embodiment, for example, one central station 2 is placed. The central station 2 is a control device placed in a command room that manages the operation of the train, and the commander can make a call from the command telephone 1 in the command room to the train crew or the crew on the command telephone 1. You can receive incoming calls from. The arrow in the traveling direction shown in FIG. 1 indicates a direction along the traveling path (that is, the railroad track) of the train.

Under the central station 2, a mobile station, which is a mobile radio station, and a plurality of base stations, which are radio stations that control radio communication, are placed. A mobile station is a wireless communication device mounted on a train as a mobile body. As shown in FIG. 1, the wireless communication system according to the first embodiment has a plurality of base stations such as a new base station 3-1, a new base station 3-2, a new base station 3-3, and an old base station 4-. 1. It has an old base station 4-2 and an old base station 4-3. Each of the new base station 3-1 and the new base station 3-2 and the new base station 3-3 is also referred to as "new base station 3". Each of the old base station 4-1 and the old base station 4-2 and the old base station 4-3 is also referred to as "old base station 4". The number of new base stations, the number of old base stations, and the arrangement of new base stations and old base stations are not limited to those shown in FIG.

The new base station 3-1, the new base station 3-2, and the new base station 3-3 are base stations updated to the new system, and are both wireless system A and wireless system B due to the expansion of the digital wireless system. Digital wireless system can be used. The old base station 4-1, the old base station 4-2, and the old base station 4-3 are base stations that have not been updated from the conventional system, and only the radio system B can be used, and the radio system A is not used. It is possible.

Multiple base stations in the wireless communication system are sequentially updated from the old base station to the new base station according to the system update stage. Therefore, in the transitional period of the transition from the conventional system to the new system, the wireless communication system is operated in a state where the old base station and the new base station coexist.

Each train is equipped with a mobile station for communicating with the central station 2. The train crew can talk to the commander of the central station 2 using the operation panel installed in the mobile station. The new mobile station 5-1 and the new mobile station 5-2 are mobile stations corresponding to the new system, and both wireless system A and wireless system B can be used by expanding the digital wireless system. Each of the new mobile station 5-1 and the new mobile station 5-2 is also referred to as "new mobile station 5". The old mobile station 6-1 and the old mobile station 6-2 are mobile stations that are continuously used from the conventional system, and only the radio system B can be used, and the radio system A cannot be used. The mobile stations in the wireless communication system are sequentially updated from the old mobile station to the new mobile station. Each of the old mobile station 6-1 and the old mobile station 6-2 is also referred to as "old mobile station 6". Therefore, in the transitional period of the transition from the conventional system to the new system, the wireless communication system is operated in a state where the old mobile station and the new mobile station coexist.

FIG. 2 is a functional block diagram schematically showing the configuration of the central station 2 of the wireless communication system according to the first embodiment. In FIG. 2, n is an integer of 1 or more. Although FIG. 2 shows six base stations, the number of base stations is not limited to six. As shown in FIG. 2, the central station 2 includes a terminal control unit 21 and a communication control unit 22.

The terminal control unit 21 controls the command telephone 1. The terminal control unit 21 receives an operation from the command telephone 1 and instructs the communication control unit 22 to transmit to the new base station 3 or the old base station 4. Further, the terminal control unit 21 controls the command telephone 1 according to the content received from the new base station 3 or the old base station 4 via the communication control unit 22.

The communication control unit 22 throws the telegram from its own station to the new base station 3 or the old base station 4 in the wireless communication system. Further, the communication control unit 22 notifies the terminal control unit 21 of the telegram from the new base station 3 or the old base station 4.

Each function of the terminal control unit 21 and the communication control unit 22 can be realized by a processing circuit. This processing circuit may be configured with dedicated hardware, or may be realized by a processor such as a CPU (Central Processing Unit) that executes a program that is software stored in a memory as a storage device for storing information. good. Further, the processing circuit may be realized by hardware, software, firmware, or a combination thereof.

FIG. 3 is a functional block diagram schematically showing the configuration of the new base station 3, which is the base station of the wireless communication system according to the first embodiment. As shown in FIG. 3, the new base station 3 includes a communication control unit 31, a multiplexing unit 32, and a wireless communication unit 33.

The communication control unit 31 communicates with the central station 2. The multiplexing unit 32 multiplexes a plurality of telegrams received from the central station 2 and transmits them to the wireless communication unit 33 in the form of a wireless frame. Further, the multiplexing unit 32 separates the wireless frame received from the wireless communication unit 33 into a plurality of telegrams and transmits them to the central station 2. The wireless communication unit 33 terminates wireless communication with the new mobile station 5 or the old mobile station 6.

Each function of the communication control unit 31, the multiplexing unit 32, and the wireless communication unit 33 can be realized by a processing circuit. This processing circuit may be configured with dedicated hardware, or may be realized by a processor that executes a program stored in memory. Further, the processing circuit may be realized by hardware, software, firmware, or a combination thereof.

FIG. 4 is a functional block diagram schematically showing the configuration of the old base station 4, which is the base station of the wireless communication system according to the first embodiment. As shown in FIG. 4, the old base station 4 includes a communication control unit 41, a multiplexing unit 42, and a wireless communication unit 43.

The communication control unit 41 communicates with the central station 2. The multiplexing unit 42 multiplexes a plurality of telegrams received from the central station 2 and transmits them to the wireless communication unit 43 in the form of a wireless frame. Further, the multiplexing unit 42 separates the wireless frame received from the wireless communication unit 43 into a plurality of telegrams and transmits them to the central station 2. The wireless communication unit 43 terminates wireless communication with the new mobile station 5 or the old mobile station 6.

Each function of the communication control unit 41, the multiplexing unit 42, and the wireless communication unit 43 can be realized by a processing circuit. This processing circuit may be configured with dedicated hardware, or may be realized by a processor that executes a program stored in memory. Further, the processing circuit may be realized by hardware, software, firmware, or a combination thereof.

FIG. 5 is a functional block diagram schematically showing the configuration of the new mobile station 5, which is the mobile station of the wireless communication system according to the first embodiment. As shown in FIG. 5, the new mobile station 5 includes a wireless communication unit 51, a multiplexing unit 52, a call control unit 53, a terminal control unit 54, and a voice control unit 55.

The wireless communication unit 51 terminates wireless communication with the new base station 3 or the old base station 4. The multiplexing unit 52 multiplexes the telegram received from the wireless communication unit 51. The call control unit 53 manages the call state with another station via the terminal control unit 54 or the wireless communication unit 51. The voice control unit 55 encodes the voice signal. The terminal control unit 54 controls the operation panel, which is a user operation unit. The terminal control unit 54 receives a call from the command telephone 1 and instructs the call control unit 53 to make a call to another station.

Each function of the wireless communication unit 51, the multiplexing unit 52, the call control unit 53, the terminal control unit 54, and the voice control unit 55 can be realized by a processing circuit. This processing circuit may be configured with dedicated hardware, or may be realized by a processor that executes a program stored in memory. Further, the processing circuit may be realized by hardware, software, firmware, or a combination thereof.

FIG. 6 is a functional block diagram schematically showing the configuration of the old mobile station 6, which is the mobile station of the wireless communication system according to the first embodiment. As shown in FIG. 6, the old mobile station 6 includes a wireless communication unit 61, a multiplexing unit 62, a call control unit 63, a terminal control unit 64, and a voice control unit 65.

The wireless communication unit 61 terminates wireless communication with the new base station 3 or the old base station 4. The multiplexing unit 62 multiplexes the telegram received from the wireless communication unit 61. The call control unit 63 manages the call state with another station via the terminal control unit 64 or the wireless communication unit 61. The voice control unit 65 encodes the voice signal. The terminal control unit 64 controls the operation panel, which is a user operation unit. The terminal control unit 64 receives a call from the command telephone 1 and instructs the call control unit 63 to make a call to another station.

Each function of the wireless communication unit 61, the multiplexing unit 62, the call control unit 63, the terminal control unit 64, and the voice control unit 65 can be realized by a processing circuit. This processing circuit may be configured with dedicated hardware, or may be realized by a processor that executes a program stored in memory. Further, the processing circuit may be realized by hardware, software, firmware, or a combination thereof.

<< 1-2 >> Operation Next, the operation of the wireless communication system according to the first embodiment will be described. FIG. 7 is a diagram showing a relationship between a digital wireless system and a service that can be provided (that is, service provision availability information) in the wireless communication system according to the first embodiment. The service provision availability information is information stored in the storage device in advance. The service provision availability information is information acquired and used by the central station 2. The service provision availability information may be stored in a storage device in the central station 2 or may be stored in an external storage device. That is, the service provision availability information may be stored in a storage device that can be acquired by the central station 2. The service Sub can be provided when at least one of the radio system A and the radio system B digital radio system is available. The service Sab is provided, for example, by radio system A when both radio system A and radio system B are available. Service Sa is a service provided by using the wireless system A. Service Sa is a service that cannot be provided when only the wireless system B can be used. The service Sb is a service provided by using the wireless system B. The service Sb is a service that cannot be provided when only the wireless system A can be used.

FIG. 8 is a sequence diagram (No. 1) showing the operation of the wireless communication system according to the first embodiment. The illustrated operation includes a handover operation, which is an operation of switching the base station with which the mobile station communicates. If a mobile station that has entered the area under the control of a certain base station can use a plurality of wireless systems, the location registration information is predetermined for each of the multiple wireless systems for the base station under the control of the mobile station. It is configured to send in sequence at different time intervals. The predetermined time interval is shorter than the time from the start of the reception waiting timer, which will be described later, to the time-out.

First, it is assumed that the new mobile station 5-1 and the old mobile station 6-1 are in the subordinate area of the new base station 3-3. In step ST101, the radio communication unit 51 of the new mobile station 5-1 transmits the location registration information to the new base station 3-3 using the radio system A, which is a digital radio system. The radio communication unit 33 of the new base station 3-3 has received the location registration information from the new mobile station 5-1 using the radio system A via the communication control unit 31 of the new base station 3-3. , Notify Central Station 2. The communication control unit 22 of the central station 2 determines whether or not the radio system A can be used for communication with the new mobile station 5-1 based on the notification received from the new base station 3-3. Further, the communication control unit 22 of the central station 2 activates a reception waiting timer for the location registration information transmitted using the wireless system B, which is a digital wireless system, when the notification is received from the new base station 3-3. ..

In step ST102, the radio communication unit 51 of the new mobile station 5-1 transmits the location registration information using the radio system B for communication with the new base station 3-3. The radio communication unit 33 of the new base station 3-3 has received the location registration information transmitted from the new mobile station 5-1 using the radio system B, that is, the communication control unit 31 of the new base station 3-3. Notify the central station 2 via. The communication control unit 22 of the central station 2 determines whether or not the radio system B can be used for communication with the new mobile station 5-1 based on the notification received from the new base station 3-3. Further, the communication control unit 22 of the central station 2 stops the reception waiting timer of the location registration information transmitted by using the wireless method B when the notification is received from the new base station 3-3.

In step ST103, the communication control unit 22 of the central station 2 wirelessly communicates with the new mobile station 5-1 in communication with the new mobile station 5-1 based on the notification received in steps ST101 to ST102 indicating that the location registration information has been received. It is determined that both methods B can be used, and the digital radio system used in the new mobile station 5-1 is determined to be, for example, the radio system A.

In step ST104, the communication control unit 22 of the central station 2 provides the service provision availability information (that is, the service that can be provided and the service that cannot be provided) shown in FIG. 7 based on the digital radio system determined in step ST103. With reference to the information shown), it is determined that the service Sab, the service Sa, and the service Sb can be provided to the new mobile station 5-1 and the service that can be provided is determined.

In step ST105, the radio communication unit 51 of the new mobile station 5-1 that has moved to the area under the control of the old base station 4-1 transmits the location registration information using the radio system A for communication with the old base station 4-1. do. However, since the wireless communication unit 43 of the old base station 4-1 cannot use the wireless system A, it cannot receive the location registration information from the new mobile station 5-1 and notifies the central station 2 of the location registration information. Do not do.

In step ST106, the radio communication unit 51 of the new mobile station 5-1 transmits the location registration information using the radio system B for communication with the old base station 4-1. The radio communication unit 43 of the old base station 4-1 has received the location registration information transmitted from the new mobile station 5-1 using the radio system B, that the communication control unit 41 of the old base station 4-1 has received. Notify the central station 2 via. The communication control unit 22 of the central station 2 can use the wireless system B for communication with the new mobile station 5-1 based on the notification received from the old base station 4-1 indicating that the location registration information has been received. Judge that there is. Further, the communication control unit 22 of the central station 2 activates the reception waiting timer of the location registration information received by the wireless method A when the notification is received from the old base station 4-1.

In step ST107, the communication control unit 22 of the central station 2 causes a timeout (that is, a reception timeout) of the reception waiting timer for the notification of the location registration information transmitted from the old base station 4-1 using the wireless system A. It is determined that the radio system A cannot be used for communication with the new mobile station 5-1.

In step ST108, the communication control unit 22 of the central station 2 determines that only the wireless system B can be used for communication with the new mobile station 5-1 based on the notification of the location registration information received in steps ST105 to ST107. Then, the available wireless system is determined.

In step ST109, the communication control unit 22 of the central station 2 is based on the availability information of the digital radio system determined in step ST108 (that is, information indicating the usable radio system and the unusable radio system). With reference to the service provision availability information shown in FIG. 7, it is determined that the service Sub and the service Sb can be provided to the new mobile station 5-1 and the service that can be provided is determined.

FIG. 9 is a sequence diagram (No. 2) showing the operation of the wireless communication system according to the first embodiment. The operation shown in FIG. 9 is shown as an operation following FIG. If a mobile station that has entered the area under the control of a certain base station can use only one wireless system, the location registration information should be transmitted to the base station under the control of the mobile station by the wireless system that can be used. It is configured in.

In step ST110, the radio communication unit 61 of the old mobile station 6-1 transmits the location registration information using the radio system B for communication with the new base station 3-3. The radio communication unit 33 of the new base station 3-3 has received the location registration information transmitted from the old mobile station 6-1 using the radio system B, that is, the communication control unit 31 of the new base station 3-3. Notify the central station 2 via. Upon receiving the notification from the new base station 3-3, the communication control unit 22 of the central station 2 determines that the radio system B can be used for communication with the old mobile station 6-1. Further, when the communication control unit 22 of the central station 2 receives the notification from the new base station 3-3, the communication control unit 22 activates the reception waiting timer of the location registration information transmitted by the wireless method A.

In step ST111, the communication control unit 22 of the central station 2 has the old mobile station 6-1 due to the timeout of the reception waiting timer of the notification of the location registration information transmitted from the new base station 3-3 using the wireless system A. It is determined that the wireless system A cannot be used for communication with the user.

In step ST112, the communication control unit 22 of the central station 2 determines that only the wireless system B can be used for communication with the old mobile station 6-1 based on the notification of the location registration information received in steps ST110 to ST111. Then, the usable wireless system is determined to be the wireless system B.

In step ST113, the communication control unit 22 of the central station 2 refers to the service provision availability information shown in FIG. 7 based on the availability information of the digital radio system determined in step ST112, and the old mobile station 6-1. It is determined that the service Sab and the service Sb can be provided, and the service that can be provided is determined.

In step ST114, the radio communication unit 61 of the old mobile station 6-1 transmits the location registration information using the radio system B for communication with the old base station 4-1. The radio communication unit 43 of the old base station 4-1 has received the location registration information transmitted from the old mobile station 6-1 using the radio system B, that the communication control unit 41 of the old base station 4-1 has received. Notify the central station 2 via. The communication control unit 22 of the central station 2 determines that the radio system B can be used for communication with the old mobile station 6-1 by receiving the notification from the old base station 4-1. Further, when the communication control unit 22 of the central station 2 receives the notification from the old base station 4-1, the communication control unit 22 activates the reception waiting timer of the location registration information transmitted by the wireless method A.

In step ST115, the communication control unit 22 of the central station 2 causes the old mobile station 6-1 due to the timeout of the reception waiting timer of the notification of the location registration information transmitted from the old base station 4-1 using the wireless system A. It is determined that the wireless system A cannot be used for communication with the user.

In step ST116, the communication control unit 22 of the central station 2 determines that only the wireless system B can be used for communication with the old mobile station 6-1 based on the notification of the location registration information received in steps ST114 to ST115. And determine the services that can be provided.

In step ST117, the communication control unit 22 of the central station 2 refers to the service provision availability information shown in FIG. 7 based on the availability of the digital radio system determined in step ST116 to the old mobile station 6-1. It is determined that the service Sab and the service Sb can be provided, and the service that can be provided is determined.

In each of the above steps, the digital wireless system used for communication may be switched to any of three or more digital wireless systems. In addition to the combination of the types of the new base station and the old base station and the types of the new mobile station and the old mobile station, the judgment of whether or not the digital radio system can be used can also be switched based on the state of the base station or the wireless device of the mobile station. It is possible. For example, in steps ST105 to ST107, even if the new base station 3-3 cannot receive wireless communication using the wireless system A due to a failure of the wireless device corresponding to the wireless system A, the central station 2 may use the new base station 2. By not receiving the notification of the location registration information transmitted using the wireless system A from the station 3-3, it is possible to determine that the wireless system A cannot be used.

<< 1-3 >> Effect As described above, the wireless communication system or the central station 2 according to the first embodiment is from a mobile station that has entered the subordinate area of any one of a plurality of base stations. Based on the location registration information transmitted to the base station under the control of the mobile station, the wireless system that can be used for communication between the base station under the control of the mobile station and the mobile station within the control area is determined. Then, based on the available wireless system, the service that can be provided to the mobile station that has entered the subordinate area is determined by referring to the service provision availability information. That is, if the wireless communication system according to the first embodiment or the central station 2 is used, the availability of the digital wireless system is determined based on the location registration information transmitted by the mobile station at the time of handover in the area under the base station. Dynamically switching the wireless system that can be used between stations and the services that can be provided by the central station regardless of the type (that is, the device of the new system to the device of the conventional system) or the state of the base station / mobile station. The effect of being able to do is obtained.

<< 2 >> Embodiment 2
<< 2-1 >> Configuration In the first embodiment, the central station 2 uses the digital wireless system by receiving the location registration information transmitted from the mobile station by each digital wireless system regardless of the old and new types of the subordinate base stations. I explained the system to judge whether it is possible or not. In the second embodiment, a wireless communication system including a configuration management unit for the central station 2b to dynamically determine the old and new types of subordinate base stations will be described.

The configuration of the wireless communication system according to the second embodiment is the same as that of the wireless communication system according to the first embodiment. Therefore, in the description of the second embodiment, FIG. 1 is also referred to.

FIG. 10 is a functional block diagram schematically showing the configuration of the central station 2b of the wireless communication system according to the second embodiment. The central station 2b shown in FIG. 10 differs from that of the first embodiment in that it has a configuration management unit 2b3. As shown in FIG. 10, the central station 2b includes a terminal control unit 2b1, a communication control unit 2b2, and a configuration management unit 2b3. The configuration management unit 2b3 is a functional unit for dynamically managing the base station configuration, and is a table (that is, a base station) that holds information indicating the base station configuration (that is, base station configuration information) in the wireless communication system. It has a configuration table) and manages the old and new distinction of the base station based on the notification from the base station. The base station configuration information may be stored in an external storage device of the central station 2b. That is, the base station configuration information may be stored in a storage device that can be acquired by the central station 2b.

Each function of the terminal control unit 2b1, the communication control unit 2b2, and the configuration management unit 2b3 can be realized by the processing circuit. This processing circuit may be configured by dedicated hardware, or may be realized by a processor that executes a program that is software stored in a memory as a storage device for storing information. Further, the processing circuit may be realized by hardware, software, firmware, memory, or a combination thereof.

FIG. 11 is a diagram showing an example of a reference station configuration table showing base station configuration information held in the configuration management unit 2b3 of the central station 2b of the wireless communication system according to the second embodiment. In FIG. 11, “BSID” indicates a base station identifier (for example, a base station number). "NAME" indicates the name of the base station. "BS TYPE" indicates the old and new types of base stations (for example, whether it is a base station of a new system or a base station of a conventional system).

FIG. 12 is a functional block diagram schematically showing the configurations of the new base stations 3b-1, 3b-2 and 3b-3, which are the base stations of the wireless communication system according to the second embodiment. As shown in FIG. 12, the new base stations 3b-1, 3b-2 and 3b-3 have the configuration management unit 3b4 in the new base stations 3-1, 3-2, 3-3 in the first embodiment, respectively. It is an addition. The configuration management unit 3b4 manages the base station number uniquely set for each base station and the old and new types of the base station.

Each function of the communication control unit 3b1, the multiplexing unit 3b2, the wireless communication unit 3b3, and the configuration management unit 3b4 can be realized by the processing circuit. This processing circuit may be configured with dedicated hardware, or may be realized by a processor that executes a program stored in memory. Further, the processing circuit may be realized by hardware, software, firmware, memory, or a combination thereof.

FIG. 13 is a functional block diagram schematically showing the configuration of the new mobile stations 5b-1 and 5b-2, which are mobile stations of the wireless communication system according to the second embodiment. As shown in FIG. 13, the new mobile stations 5b-1 and 5b-2 are the new mobile stations 5-1 and 5-2 of the first embodiment plus the configuration management unit 5b6, respectively. The configuration management unit 5b6 holds the configuration management unit 5b6 in the next base station configuration table notified from the configuration management unit 2b3 of the central station 2b.

Each function of the wireless communication unit 5b1, the multiplexing unit 5b2, the call control unit 5b3, the terminal control unit 5b4, the voice control unit 5b5, and the configuration management unit 5b6 can be realized by the processing circuit. This processing circuit may be configured with dedicated hardware, or may be realized by a processor that executes a program stored in memory. Further, the processing circuit may be realized by hardware, software, firmware, memory, or a combination thereof.

FIG. 14 is a diagram showing an example of a next base station configuration table, which is the next base station configuration table held in the configuration management unit 5b6 of the new mobile station 5b, which is the mobile station of the wireless communication system according to the second embodiment. .. In FIG. 14, “BSID” indicates a base station identifier (eg, base station number). "NAME" indicates the name of the base station. "BS TYPE" indicates the old and new types of base stations.

<< 2-2 >> Operation Next, the operation of the wireless communication system according to the second embodiment will be described. FIG. 15 is a sequence diagram showing the operation of the wireless communication system according to the second embodiment. This operation includes an operation of dynamically determining the base station configuration. In the second embodiment, the mobile station entering the subordinate area of any one of the plurality of base stations is a mobile station based on the base station configuration information which is the information indicating the configuration of the plurality of base stations. It is determined whether or not to transmit the location registration information to the base station under the control of.

In step ST201, the configuration management unit 3b4 of the new base stations 3b-1, 3b-2 and 3b-3 controls communication of the base station number it has and information indicating that it is the new base station at the time of activation. It is transmitted as base station information registration to the configuration management unit 2b3 of the central station 2b via the communication control unit 2b2 of the unit 3b1 and the central station 2b.

In step ST202, the configuration management unit 2b3 of the central station 2b updates the information of the base station notified by the base station configuration information table, and manages the old and new distinction information of the base station. The initial value of the old and new base station distinction information in the base station configuration information table is the old base station, and the new base station information is registered from the new base stations 3b-1, 3b-2 and 3b-3. The information is updated as a base station, and the information is retained as an old base station because the registration of the base station information is not received from the old base stations 4-1, 4-2 and 4-3.

FIG. 16 is a sequence diagram (No. 1) showing the operation of the wireless communication system according to the second embodiment. The illustrated operation includes a handover operation of switching a base station to communicate with while the mobile station is moving. If a mobile station that has entered the area under the control of a certain base station can use a plurality of wireless systems, the location registration information is predetermined for each of the multiple wireless systems for the base station under the control of the mobile station. It is configured to send in sequence at different time intervals. However, a mobile station that has entered the area under a certain base station depends on a wireless system that is known to be unusable based on the base station configuration information, even if multiple wireless systems can be used. Do not send location registration information.

Steps ST301 to ST304 are the same as steps ST101 to ST103 in the first embodiment. In step ST305, the configuration management unit 2b3 of the central station 2b becomes the new mobile station 5b-1 via the communication control unit 2b2 of the central station 2b, the communication control unit 3b1 of the new base station 3b-3, and the wireless communication unit 3b3. Notify the old and new distinction of the next base station. The new mobile station 5b-1 keeps the old and new distinction of the next base station received from the central station 2b in the configuration management unit 5b6.

In step ST306, the radio communication unit 5b1 of the new mobile station 5b-1 is located only in the radio system B based on the old and new distinction between the old and new base stations held by the configuration management unit 5b6 with respect to the old base station 4-1. Send registration information. The radio communication unit 43 of the old base station 4-1 has received the location registration information transmitted from the new mobile station 5b-1 using the radio system B, that the communication control unit 41 of the old base station 4-1 has received. Notify the central station 2b via. The communication control unit 22 of the central station 2b determines that the radio system B can be used for communication with the new mobile station 5b-1 by receiving the notification from the old base station 4-1. Further, the communication control unit 2b2 of the central station 2b does not start the reception waiting timer of the radio system A because the old and new distinction information of the old base station 4-1 held by the configuration management unit 2b3 is the old base station.

In step ST307, the communication control unit 2b2 of the central station 2b communicates with the new mobile station 5b-1 based on the notification of the location registration information received in step ST306 and the base station configuration information held by the configuration management unit 2b3. It is determined that only wireless method B can be used, and the services that can be provided are determined.

In step ST308, the communication control unit 2bh2 of the central station 2b sets the new mobile station 5b-1 with reference to the service provision availability information shown in FIG. 7 based on the availability of the digital radio system determined in step ST307. It is determined that the service Sab and the service Sb can be provided, and the service that can be provided is determined.

FIG. 17 is a sequence diagram (No. 2) showing the operation of the wireless communication system according to the second embodiment. The operation shown in FIG. 17 is shown as an operation following FIG.

In step ST309, the configuration management unit 2b3 of the central station 2b becomes the new mobile station 5b-1 via the communication control unit 2b2 of the central station 2b, the communication control unit 41 of the old base station 4-1 and the wireless communication unit 43. Notify the old and new distinction of the next base station. The new mobile station 5b-1 keeps the old and new distinction of the next base station received from the central station 2b in the configuration management unit 5b6.

In step ST310, the radio communication unit 61 of the old mobile station 6-1 transmits the location registration information using the radio system B for communication with the new base station 3b-3. The communication control unit 3b1 of the new base station 3b-3 indicates that the radio communication unit 3b3 of the new base station 3b-3 has received the location registration information transmitted from the old mobile station 6-1 using the radio system B. Notify the central station 2b via. Upon receiving the notification from the new base station 3b-3, the communication control unit 2b2 of the central station 2b determines that the radio system B can be used for communication with the old mobile station 6-1. Further, the communication control unit 2b2 of the central station 2b activates the reception waiting timer of the radio system A because the old and new distinction information of the new base station 3b-1 held by the configuration management unit 2b3 is the new base station.

In step ST311, the communication control unit 2b2 of the central station 2b has the old mobile station 6-1 due to the timeout of the reception waiting timer of the notification of the location registration information transmitted from the new base station 3b-3 using the wireless method A. It is determined that the wireless system A cannot be used for communication with the user.

In step ST312, the communication control unit 2b2 of the central station 2b determines that only the wireless system B can be used for communication with the old mobile station 6-1 based on the notification of the location registration information received in steps ST310 to ST311. And determine the services that can be provided.

In step ST313, the communication control unit 2b2 of the central station 2b refers to the service provision availability information shown in FIG. 7 based on the availability of the digital radio system determined in step ST312, to the old mobile station 6-1. It is determined that the service Sab and the service Sb can be provided, and the service that can be provided is determined.

In step ST314, the old mobile station 6-1 transmits the location registration information using the radio system B for communication with the old base station 4-1. The radio communication unit 43 of the old base station 4-1 has received the location registration information transmitted from the old mobile station 6-1 using the radio system B, that the communication control unit 41 of the old base station 4-1 has received. Notify the central station 2b via. The communication control unit 22 of the central station 2b determines that the radio system B can be used for communication with the old mobile station 6-1 by receiving the notification from the old base station 4-1. Further, the communication control unit 2b2 of the central station 2b does not start the reception waiting timer of the radio system A because the old and new distinction information of the old base station 4-1 held by the configuration management unit 2b3 is the old base station.

In step ST315, the communication control unit 2b2 of the central station 2b communicates with the old mobile station 6-1 based on the notification of the location registration information received in step ST314 and the base station configuration information held by the configuration management unit 2b3. It is determined that only wireless method B can be used, and the services that can be provided are determined.

In step ST316, the communication control unit 2bh2 of the central station 2b refers to the service provision availability information shown in FIG. 7 based on the availability of the digital radio system determined in step ST315 to the old mobile station 6-1. It is determined that the service Sab and the service Sb can be provided, and the service that can be provided is determined.

<< 2-3 >> Effect As described above, if the wireless communication system according to the second embodiment is used, the configuration management unit 2b3 of the central station 2b manages the configuration information of the base station to manage the configuration information of the old base station. It is possible to determine whether or not the digital wireless system can be used without waiting for the reception timeout of the location registration information transmitted using the wireless system A in the subordinate area. Therefore, it is possible to obtain the effect that the time required for determining the digital wireless system to be used and the service to be provided can be shortened.

1 Command phone, 2, 2b Central station, 3, 3-1, 3-2, 3-3 New base station, 4, 4-1 4-2, 4-3 Old base station, 5, 5-1 5-2 New mobile station, 6, 6-1 and 6-2 Old mobile station, 21, 2b1 Terminal control unit, 22, 2b2 Communication control unit, 2b3 Configuration management unit, 31, 3b1 Communication control unit, 32, 3b2 Multiplex Chemical unit, 33, 3b3 wireless communication unit, 3b4 configuration management unit, 41 communication control unit, 42 multiplexing unit, 43 wireless communication unit, 51, 5b1 wireless communication unit, 52, 5b2 multiplexing unit, 53, 5b3 call control unit. , 54, 5b4 terminal control unit, 55, 5b5 voice control unit, 5b6 configuration management unit, 61 wireless communication unit, 62 multiplexing unit, 63 call control unit, 64 terminal control unit, 65 voice control unit.

Claims

Central station and
With multiple base stations,
A mobile station that communicates with the central station via any of the plurality of base stations,
Have,
The central station
The service provision availability information indicating the service that can be provided to the mobile station is acquired according to the wireless system that can be used by each of the plurality of base stations.
The mobile station is based on location registration information transmitted from the mobile station that has entered the area under the control of any of the plurality of base stations to the base station under the control of the mobile station. The radio system that can be used for communication between the base station under the control of the above and the mobile station that has entered the area under the control of the above is determined.
A wireless communication system that determines a service that can be provided to the mobile station that has entered the subordinate area by referring to the service provision availability information based on the available wireless system.
The mobile station that has entered the area under the control of any of the plurality of base stations is registered in the location of the base station under the control of the mobile station when a plurality of wireless systems can be used. The wireless communication system according to claim 1, wherein information is sequentially transmitted at predetermined time intervals in each of the plurality of wireless systems.
The mobile station that has entered the area under the control of any of the plurality of base stations is registered in the location of the base station under the control of the mobile station when one wireless system can be used. The wireless communication system according to claim 1 or 2, wherein information is transmitted by the one wireless method.
The mobile station that has entered the area under the control of any of the plurality of base stations
It has a configuration management unit that stores in advance base station configuration information, which is information indicating the configurations of the plurality of base stations.
The wireless communication system according to claim 1 or 2, wherein it is determined whether or not to transmit the location registration information to the base station under the control of the mobile station based on the base station configuration information.
The wireless communication system according to any one of claims 1 to 4, wherein the mobile station is a wireless communication device mounted on a train.
The central station in a wireless communication system having a central station, a plurality of base stations, and a mobile station that communicates with the central station via any of the plurality of base stations.
The service provision availability information indicating the service that can be provided to the mobile station is acquired according to the wireless system that can be used by each of the plurality of base stations.
The mobile station is based on location registration information transmitted from the mobile station that has entered the area under the control of any of the plurality of base stations to the base station under the control of the mobile station. The radio system that can be used for communication between the base station under the control of the above and the mobile station that has entered the subordinate area is determined.
A central station that determines services that can be provided to the mobile station that has entered the subordinate area by referring to the service availability information based on the available wireless system.