JP2008011310A - Wireless communication system - Google Patents

Abstract

【Task】
In the case of renewal of radio equipment and maintenance inspection of a radio communication system, it is desired to realize a radio communication system capable of renewing equipment and performing maintenance inspection by a simple method without stopping the operation of the radio system.
[Solution]
In a radio communication system having a control station, a base station, and a mobile station, the base station has a detachable board, and a transceiver for transmitting and receiving to and from the mobile station on the board and a microcomputer for controlling the transceiver The control station has a line connection device, a board attaching / detaching mechanism section for detachably attaching the base station board, and a system microcomputer connected to the microcomputer via the board attaching / detaching mechanism section. When the base station board is removed from the board attaching / detaching mechanism, the system microcomputer reads the data of the transmitting / receiving unit immediately before removing the base station board from the microcomputer and stores it in the storage part of the system microcomputer. Configured to do.
[Selection] Figure 7

Description

  The present invention relates to a wireless communication system, and more particularly to a wireless communication system that facilitates board replacement.

  Conventionally, in a wireless communication system, when a mobile station such as a train (hereinafter referred to as a mobile station) communicates across a plurality of base station zones, a different base station identification signal is transmitted from each base station, and the mobile station In general, a method of connecting a mobile station and a base station by using a series of sequences such as returning a received base station identification signal as a base station designation signal has been common. According to this method, when the next zone is free, the connection can be continued, and the zone in which the mobile station exists can be occupied, so that there is an advantage of good communication efficiency.

  An example of a conventional wireless communication system (see, for example, Patent Document 1) is shown in FIG. In FIG. 5, reference numerals 501 and 502 denote leaky coaxial cables (hereinafter referred to as LCX cables) that perform radio wave radiation and reception, and configure different radio zones for the LCX cables 501 and 502. Reference numeral 503 denotes a base station A that is connected to the LCX cable 501 and constitutes an LCX zone (referred to as LCX zone A) of the LCX cable 501. This base station 503 constitutes a radio base station by using an antenna duplexer 505, a receiver Rx 506, a transmitter Tx 507, and a base station identification signal generator 508. Similarly, reference numeral 504 denotes a base station B that is connected to the LCX cable 502 and constitutes an LCX zone (referred to as LCX zone B) of the LCX cable 502. This base station 504 constitutes a radio base station by using an antenna duplexer 509, a receiver Rx510, a transmitter Tx511, and a base station identification signal generator 512. Each base station 503 and 504 transmits a different base station identification signal, and the mobile station 530 returns the received base station identification signal as a base station designation signal. Each base station is connected to the control device 520, and supplies the base station designation signal returned from the mobile station 530 to the control device 520. Based on the base station designation signals detected by the base station designation signal detectors 521 and 522, the control device 520 switches the switch 523 to select a base station system to receive. Similarly, the switch 524 selects a transmission base station system. The line connection device 525 is connected to the control device 520 and terminals 526 and 527 such as telephones.

  On the other hand, the mobile station 530 receives radio waves from the LCX cables 501 and 502 by the antenna 531, demodulates by the receiver Rx 533 through the duplexer 532, and supplies the demodulated signal to the line connection device 536. The other output from the receiver Rx 533 is supplied to the base station identification signal detector 535, and the result is output to the line connection device 536. The transmission output from the line connection device 536 is combined with the base station designation signal according to the base station identification signal and transmitted from the antenna 531 via the transmitter Tx 534 and the duplexer 532.

  Next, the operation of the system shown in FIG. 5 will be described. In FIG. 5, the signal generated from the base station identification signal generator 508 in the base station A 503 is transmitted from the transmitter 507 and is always transmitted from the LCX cable 501 via the duplexer 505. Similarly, a signal generated from the base station identification signal generator 512 in the base station B 504 is transmitted from the transmitter 511 and is always transmitted from the LCX cable 502 via the duplexer 509. These identification signals are different between LCX zone A and LCX zone B. When the mobile station 530 passes through the LCX zone A, the radio wave from the LCX cable 501 is received by the antenna 531 of the mobile station 530, and the base station identification signal detector 535 passes through the duplexer 532 and the receiver 533. A base station identification signal CC1 is detected.

  When the mobile station 530 transmits, a communication line is connected to the base station A503 in the LCX zone A by adding a signal designating the LCX zone A as a base station designating signal. When the mobile station 530 leaves the LCX zone A and enters the adjacent LCX zone B, the radio wave from the LCX zone B is received by the antenna 531 of the mobile station 530 and the base station identification signal detector 535 receives the LCX. The identification signal CC2 of the base station B504 in zone B is detected. In addition, the base station designation signal used for transmission designates LCX zone B, so that the communication line is connected to base station B 504 in LCX zone B. As described above, communication between different zones of the mobile station and the plurality of base stations is sequentially switched to perform communication. In the above conventional example, two base stations, the base station A 503 and the base station B 504, have been described, but actually, a plurality of base stations are installed at intervals of several to several tens of kilometers.

  Now, the train radio system currently used is changed from the spatial wave system to the LCX cable system, and the quality of the train radio line is improved, the capacity of the line is increased, or a new data line is introduced. As a result, train radio lines are also widely used for passenger services such as business telephones such as command telephones, public telephones, and text news. When carrying out high-speed and high-density operation, it is appropriate and prompt for passengers and passengers. It is an indispensable facility for providing information.

  However, recent communication technology has undergone significant development, and even in train radio systems, it is inevitable to digitize the system and update the system in order to respond to further operational efficiency, enhanced maintenance functions, and improved passenger service. I ’m here. Furthermore, in recent railway companies, there are cases where two and three railway companies enter the vehicle with each other from the viewpoint of convenience of passengers, business expansion or securing passengers. In addition, even within a railway company, when a different communication system is used to update the railway equipment, it is problematic in terms of cost to upgrade the equipment on all lines or switch to another communication system at the same time. There are cases where partial equipment upgrades or other communication methods are employed, but in any case, huge costs are required to update equipment. Also, in the case of maintenance inspections, it is required that the operation of the entire radio system be stopped in the public train system as much as possible, and only a part of the radio system is stopped or the equipment is Realization of a wireless communication system that can be updated and maintained is desired.

JP 2000-49683 A

  Even in the case of renewal and maintenance inspections of radio equipment in a radio communication system, it is possible to stop only a part of the radio system without stopping the operation of the entire radio system, or to update and maintain the equipment with a simple method. Realization of a communication system is desired.

  The objective of this invention is providing the radio | wireless communications system which can perform the update and maintenance inspection of radio | wireless equipment easily.

  Another object of the present invention is to provide a wireless communication system that can update or maintain a wireless facility without stopping the operation of the entire wireless system.

  Still another object of the present invention is to provide a wireless communication system capable of renewing and maintaining a wireless facility by replacing a board.

  The present invention provides a wireless communication system having a control station, a plurality of base stations connected to the control station, and a mobile station connected to the base station via a radio channel, wherein the base station is a detachable first A first transceiver for transmitting and receiving to and from the mobile station on the first substrate, and a first microcomputer for controlling the first transceiver and the control station A first line connection device to which a signal from the first transmission / reception unit of the station is input, a first substrate attachment / detachment mechanism unit for detachably attaching the first substrate of the base station, and the first substrate attachment / detachment In the case of having a first system microcomputer connected to the first microcomputer via a mechanism unit and removing the first board of the base station from the first board attaching / detaching mechanism part, the first system microcomputer Is the first transmission / reception immediately before the first board of the base station is removed. It reads the section data from said first microcomputer is configured to store in the storage unit of the first system microcomputer.

  In the wireless communication system of the present invention, when the first board is removed from the first board attaching / detaching mechanism and the second board is attached to the first board attaching / detaching mechanism, the first system is provided. The microcomputer is configured to write the data of the first transmission / reception unit read from the first microcomputer to the second microcomputer on the second substrate.

  Further, the present invention provides a wireless communication system having a control station, a plurality of base stations connected to the control station, and a mobile station connected to the base station through a radio channel, the mobile station being detachable A second board, and a second transceiver for transmitting and receiving to and from the base station on the second board, and a second microcomputer for controlling the second transceiver and the mobile station, A second circuit connection device to which a signal from the second transmission / reception unit of the second substrate is input; a second substrate attaching / detaching mechanism unit for detachably attaching the second substrate from the mobile station; In the case of having a second system microcomputer connected to the second microcomputer via a second board attaching / detaching mechanism, and removing the second board of the mobile station from the second board attaching / detaching mechanism, The second system microcomputer immediately before removing the second board of the mobile station It reads the data of the second transceiver from said second microcomputer configured to store in the storage unit of the second system microcomputer.

  In the wireless communication system of the present invention, when the second board is removed from the second board attaching / detaching mechanism and the third board is attached to the second board attaching / detaching mechanism, the second system is provided. The microcomputer is configured to write the data of the second transmission / reception unit read from the second microcomputer to the third microcomputer on the third substrate.

  As described above, according to the present invention, it is possible to realize a wireless communication system capable of only updating a part of a wireless system or updating equipment or performing maintenance and inspection with a simple method. In addition, it is possible to provide a wireless communication system that can easily replace a board without stopping the operation of the entire wireless system even in the case of renewal or maintenance inspection of the wireless equipment of the wireless communication system.

  First, before describing the present invention, a wireless communication system to which the present invention is applied will be described with reference to FIGS. The wireless communication system described here is described in detail in Japanese Patent Application No. 2006-110612 (application date: April 13, 2006) filed earlier by the present applicant. FIG. 1 is a block diagram showing a schematic configuration of a radio communication system to which the present invention is applied. For example, an analog A radio communication system and an analog B radio communication system are connected. Such a connection is conceivable, for example, when Company A and Company B get on a train with each other. In FIG. 1, 101-A represents an analog A-type control station. 101-B represents a control station where analog A system and analog B system coexist. Reference numeral 101-C denotes an analog B system control station. In addition, when representing the control station, it is referred to as the control station 101. 102- (m-4), 102- (m-3), 102- (m-2), 102- (m-1), and 102-m are base station A (m-4) and base station A, respectively. (M-3), base station A (m-2), base station A (m-1), and base station Am. In addition, when representing an analog A type base station, it is referred to as base station A102. 103-1, 103-2, 103-3, and 103-4 represent the base station B1, the base station B2, the base station B3, and the base station B4, respectively. In addition, when representing an analog B system base station, it is referred to as a base station B103. 104- (m-4), 104- (m-3), 104- (m-2), 104- (m-1), 104-m are leaky coaxial cables (hereinafter abbreviated as LCX) LCX. (M-4), LCX (m-3), LCX (m-2), LCX (m-1), and LCXm are represented. Note that the analog A type LCX is referred to as LCX 104. 105-1, 105-2, 105-3, and 105-4 represent LCX1, LCX2, LCX3, and LCX4, respectively. Note that the analog B type LCX is referred to as LCX 105. Reference numeral 106 denotes a mobile station such as a train.

  The control station 101, the base station A102, the base station B103, the LCX 104, and the LCX 105 described above are connected by a transmission path as shown in FIG. 1, and communication zones (m-4),. ... Are arranged separately for each four. The LCXs 104 and 105 are installed, for example, along railway lines, and communication between the mobile station 106 and the base station A 102 and the base station B 103 is performed via the LCXs 104 and 105.

  Here, the analog A method and the analog B method will be described. As explained earlier, we explained that there are cases where railroad companies carry vehicles into each other, and that old and new systems may coexist in the same railway company due to railway equipment upgrades, etc. In such a case, the analog A method is, for example, the frequency emitted from the LCX is F1, and the frame structure for communication signal transmission is T1, whereas the analog B method is, for example, emitted from the LCX. It is conceivable that the frequency to be transmitted is F2 and the frame configuration for communication signal transmission is T2. As described above, communication systems having different frequency and signal frame configurations cannot naturally communicate with each other. The wireless communication system described here realizes a wireless communication system that can transmit and receive to both communication methods when the communication methods are different. In FIG. 1, the control station A 101-A is located in the analog A system zone, and the control station 101-C is located in the analog B system zone. However, the control station 101-B is located in a zone in which an analog A zone and an analog B zone are mixed. The base station A102- (m-4) and the base station A102- (m-3) are located in the zone of the control station A101-A, and the base station A102- (m-2) and base station A102- (m -1), the base station A102-m, the base station B103-1, and the base station B103-2 are located in the zone of the control station B101-B, and the base station B103-3 and the base station B103-4 are the control station C101. Located in the -C zone.

  Next, the control station 101 and the base stations 102 and 103 will be described with reference to FIGS. FIG. 2 is a block diagram of a schematic configuration showing a part of the base station A102- (m-2), the base station A102- (m-1) and the control station 101-B located in the analog A system zone. The (m−3) base stations A of the base station A 102-1 to base station A 102- (m−3) are all located in the analog A system zone, and therefore all the configurations thereof are shown in FIG. Therefore, the base station A102- (m-2) and the base station A102- (m-1) are representatively described. Similarly, since (n-1) base stations B of base station B 103-2 to base station B 103-n are all located in the analog B zone, the configuration is almost the same as the configuration shown in FIG. It is. The only difference is, for example, the difference between the analog A system and the analog B system. Therefore, the base station A102- (m-2) and the base station A102- (m-1) are representatively described. Here, for convenience of explanation, the analog A method is a method in which, for example, the frequency emitted from the LCX described above is F1, and the frame configuration for communication signal transmission is T1, in this embodiment. In the present embodiment, the analog B method is a method in which, for example, the frequency emitted from the LCX described above is F2, and the frame configuration for communication signal transmission is T2, but the present invention is not limited to this. Absent. The configuration and operation of the embodiment shown in FIG. 2 are almost the same as those of the conventional wireless communication system shown in FIG.

  In FIG. 2, the base station A102- (m-2) configuring the zone (M-2) includes an antenna duplexer 201, a receiver ARx202, a transmitter ATx203, and a base station identification signal generator 204. Similarly, the base station A 102-(m−1) includes an antenna duplexer 210, a receiver ARx 211, a transmitter ATx 212, and a base station identification signal generator 213. Here, each of the base stations A102- (m-2) and 102- (m-1) transmits different base station identification signals, for example, AS (m-2) and AS (m-1) as identification IDs. Then, the mobile station 106 returns the received base station identification signal as a base station designation signal. Each base station is connected to the control unit 220 and supplies the base station designation signal returned from the mobile station 106 to the control unit 220. Based on the base station designation signals detected by the base station designation signal detectors 221 and 222, the control unit 220 switches the switch 223 to select a base station system to receive. Similarly, the switch 224 selects the transmission base station system. The line connection device 225 is connected to the control unit 220 and terminals 226 and 227 such as telephones.

  FIG. 3 is a block diagram of a schematic configuration of a part of the control station B and the base station A 102-m and the base station B 103-1. Note that the base station A 102-m and the base station B 103-1 are located in a zone where the analog A system zone is switched to the analog B system zone. In FIG. 3, a base station A 102-m is a base station A 102-m that is connected to the LCX 104-m and forms an LCX zone m. The base station A 102-m includes an antenna duplexer 301, an analog A system receiver ARx302, an analog A system transmitter ATx303, and a base station identification signal generator 304 that generates a base station identification signal ASm. The base station B 103-1 is a base station B 103-1 connected to the LCX 105-1 and configuring the LCX zone 1 of the LCX 105-1. This base station B 103-1 constitutes a radio base station by using an antenna duplexer 310, an analog B system receiver BRx 311, an analog B system transmitter BTx 312 and a base station identification signal generator 313 for generating a base station identification signal BS1. Accordingly, each base station A 102-m and base station B 103-1 transmits different base station identification signals ASm and BS1.

  Reference numeral 305 denotes a base station designation signal detector that detects a base station designation signal transmitted from the mobile station 106 described later via the base station A 102-m. Reference numeral 306 denotes an interface unit (I / F unit), and the base station A 102 -m is connected to the line connection device 324 via the I / F unit 306. Reference numeral 314 denotes a base station designation signal detector that detects a base station designation signal transmitted from the mobile station 106 described later via the base station B 103-1. Reference numeral 315 denotes an interface unit (I / F unit), and the base station B 103-1 is connected to the line connection device 324 via the I / F unit 315. Reference numeral 321 denotes a control unit which receives base station designation signals from the base station designation signal detection units 305 and 314 and controls the I / F units 306 and 315 based on the base station designation signals. Reference numeral 322 denotes a counter, and 323 denotes a storage unit. 325 and 326 are terminal devices such as telephones.

  FIG. 4 shows a block diagram of a schematic configuration of the mobile station 106. In FIG. 4, 401 is an analog A system transmission / reception unit, 402 is an analog B system transmission / reception unit, 403 is a control unit, 404 is a line connection device, and 405 and 406 are terminal devices such as telephones. The analog A system transceiver 401 includes an antenna 411, an antenna duplexer 412, an analog A system receiver 413, an analog A system transmitter 414, a base station identification signal detector 415 that detects a base station identification signal, and an I / F unit 416. It consists of The analog B system transceiver 402 includes an antenna 421, an antenna duplexer 422, an analog B system receiver 423, an analog B system transmitter 424, a base station identification signal detector 425 that detects a base station identification signal, and an I / F. Part 426. The control unit 403 includes a counter 431 and a storage unit 403, and controls the I / F units 416 and 426 based on detection signals from the base station identification signal detectors 415 and 424.

  Next, the operation of this wireless communication system will be described with reference to FIGS. First, it is assumed that the mobile station 106 is traveling in the direction of the arrow shown in FIG. The case where the mobile station 106 passes through the zone (m-2) of the base station A102- (m-2) will be described with reference to FIG. The base station identification signal AS (m-2) generated by the base station identification signal generator 204 in the base station A102- (m-2) is transmitted from the analog A system transmission unit 203 and passes through the duplexer 201. Thus, the data is always transmitted from the LCX cable 104- (m-2). In the analog A method at this time, as described above, for example, a signal having a frequency F1 and a frame configuration for communication signal transmission T1 is transmitted. Similarly, the base station identification signal AS (m−1) generated by the base station identification signal generator 213 in the base station A 102- (m−1) is transmitted from the analog A system transmission unit 212, and is shared by the duplexer 210. Is always transmitted from the LCX cable 104- (m-1).

  Thus, when the mobile station 106 passes through the zone (m-2) of the base station A102- (m-2), the analog A system transmission / reception unit 401 of the mobile station 106 transmits the base station A102- (m-2). ) And signals. That is, the antenna 411 receives the radio wave from the LCX cable 104-(m−2), and the base station identification signal AS (m (m) is received by the base station identification signal detector 415 via the duplexer 412 and the analog A system receiving unit 413. -2) is detected. When this signal is detected, the base station identification signal detector 415 supplies the base station identification signal AS (m−2) to the control unit 403. Upon receiving this signal, the control unit 403 counts the base station A 102-(m−2) with the counter 431 and controls the I / F unit 416 to connect to the line connection device 404. The operation of the control unit 403 will be described later.

  On the other hand, the mobile station 106 that has detected the base station identification signal AS (m−2) transmits a signal designating the base station A 102− (m−2), for example, the base station designation signal AS (m−2). Attached to the signal to be transmitted from 106 is transmitted. The signal attached with the base station designation signal AS (m−2) from the mobile station 106 is transmitted from the line connection device 404 to the I / F unit 416, the analog A system transmission unit 414, the duplexer 412, and the antenna 411 to the LCX cable 104−. To (m-2). When the base station A102- (m-2) receives the signal from the mobile station 106 from the LCX cable 104- (m-2), the base station designation signal detection unit via the duplexer 201 and the analog A system reception unit 202 At 221, the base station designation signal AS (m−2) is detected and supplied to the switches 223 and 224. The switches 223 and 224 have a function of controlling switching of the base station 102. In this example, the switches 223 and 224 show only switching between the base station A102- (m-2) and the base station A102- (m-1), but when there are three or more base stations. , Each has a function of switching operation. In the case of FIG. 2, since the base station designation signal AS (m−2) is detected, the switches 223 and 224 determine that the mobile station 106 is passing through the zone (m−2) and connect to the line. Device 225 is connected to analog A system receiver 202 and analog A system transmitter 203. As a result, the terminal devices 405 and 406 of the mobile station 106 can communicate with the terminal devices 226 and 227 of the control station B. In this example, the base station identification signal AS (m-2) and the base station designation signal AS (m-2) are the same signal, but the base station designation signal may be different from the base station identification signal. it can.

  Similarly, when the mobile station 106 enters the zone (m-1) of the base station A102- (m-1), the analog A system transmission / reception unit 401 of the mobile station 106 transmits signals to the base station A102- (m-1). Send and receive. That is, the antenna 411 receives the radio wave from the LCX cable 104- (m−1), and the base station identification signal AS (m (m) is received by the base station identification signal detector 415 via the duplexer 412 and the analog A system receiving unit 413. -1) is detected. When this signal is detected, the base station identification signal detector 415 supplies the control unit 403 with the base station identification signal AS (m−1). Upon receiving this signal, the control unit 403 counts the base station A 102-(m−1) with the counter 431 and controls the I / F unit 416 to connect to the line connection device 404. The operation of the control unit 403 will be described later.

  On the other hand, the mobile station 106 that has detected the base station identification signal AS (m−1) transmits a signal designating the base station A102- (m−1), for example, the base station designation signal AS (m−1), to the mobile station. Attached to the signal to be transmitted from 106 is transmitted. The signal attached with the base station designation signal AS (m−1) from the mobile station 106 is transmitted from the line connection device 404 to the I / F unit 416, the analog A system transmission unit 414, the duplexer 412, and the antenna 411 to the LCX cable 104−. To (m-1). When the base station A 102-(m−1) receives the signal from the mobile station 106 from the LCX cable 104-(m−1), the base station designation signal detection unit via the duplexer 210 and the analog A system reception unit 211. At 222, the base station designation signal AS (m−1) is detected and supplied to the switches 223 and 224. The switches 223 and 224 have a function of controlling switching of the base station 102 as described above. In the case of FIG. 2, since the base station designation signal AS (m−1) is detected, the switches 223 and 224 determine that the mobile station 106 is passing through the zone (m−1), The line connection device 225 is connected to the analog A system receiver 211 and the analog A system transmitter 212. As a result, the terminal devices 405 and 406 of the mobile station 106 can communicate with the terminal devices 226 and 227 of the control station B. In this way, the base station 102 is sequentially switched in accordance with the progress of the mobile station 106 so that the mobile station 106 and the base station 102 can communicate with each other.

  In the above description, when the mobile station 106 passes through the zone of the same communication method, that is, the analog A method, the base station 102 is sequentially switched by the above switching, and the communication is continued. However, when the communication systems are different, for example, when the mobile station 106 enters the analog B system zone from the analog A system zone, that is, the mobile station 106 moves from the base station A 102-m to the base station B 103-1. In this case, switching cannot be performed as described above. This is because the base station A 102-m and the base station B 103-1 have different communication systems, and the analog A system transmission / reception unit 401 of the mobile station 106 cannot receive a signal from the base station B 103-1.

  A method for solving this problem will be described with reference to FIGS. First, in the storage unit 323 of the control unit 321 and the storage unit 432 of the control unit 403 shown in FIGS. 3 and 4, the base station ID (or number) and the zone crossing counter No. Is remembered. Hereinafter, this table is referred to as a base station ID table.

表１において、通信方式は、アナログＡ方式、アナログＢ方式を表し、基地局名（またはＩＤ）は、図１に示す各基地局１０２および１０３を表す。ゾーン渡りカウンタＮｏ．は、移動局１０６が所定の基地局のゾーンから次の基地局のゾーンへ移るときに各制御部３２１のカウンタ３２２および制御部４０３のカウンタ４３１のカウント番号をカウントする、所謂、ゾーン渡りカウンタＮｏ．を表している。

In Table 1, the communication method represents the analog A method and the analog B method, and the base station name (or ID) represents each of the base stations 102 and 103 shown in FIG. Zone crossing counter No. The mobile station 106 counts the count numbers of the counter 322 of each control unit 321 and the counter 431 of the control unit 403 when the mobile station 106 moves from the zone of the predetermined base station to the zone of the next base station. . Represents.

  Now, as described above, when the mobile station 106 is passing through the base station A 102- (m−1), the base station designation signal AS (m−1) is supplied to the switches 223 and 224. did. The base station designation signal AS (m−1) of these switches 223 and 224 is also supplied to the control unit 321 (not shown). Therefore, the control units 321 and 403 refer to the base station ID table shown in Table 1 stored in the respective storage units 323 and 432 so that the mobile station 106 is passing through the communication zone of which base station. I know if there is.

  Next, a case where the mobile station 106 moves from the zone m of the base station A 102-m to the zone 1 of the base station B 103-1 will be described. First, the base station identification signal ASm generated by the base station identification signal generator 303 in the base station A 102-m is transmitted from the analog A system transmission unit 303, and always passes through the duplexer 301 to the LCX cable 104-. m. On the other hand, the base station identification signal BS1 generated by the base station identification signal generator 313 in the base station B 103-1 is transmitted from the analog B system transmission unit 312 and always passes through the duplexer 310 and the LCX cable 105-1. Sent from

  Thus, while the mobile station 106 passes through the zone m of the base station A 102-m, the analog A system transmission / reception unit 401 of the mobile station 106 transmits and receives signals to and from the base station A 102-m. That is, the antenna 411 receives the radio wave from the LCX cable 104-m, and the base station identification signal detector 415 detects the base station identification signal ASm via the duplexer 412 and the analog A system receiver 413. When this signal is detected, the base station identification signal detector 415 supplies the base station identification signal ASm to the control unit 403. When the control unit 403 receives this signal, the counter 431 is based on the base station ID table shown in Table 1 and the zone crossing counter No. Is incremented by 1 to “19”. Here, m is, for example, 20. That is, there are 20 analog A type base stations. And the zone crossing counter No. It can be seen that 19 is still an analog A base station. Therefore, the control unit 403 controls the I / F unit 416 to connect to the line connection device 404.

  On the other hand, the mobile station 106 that has detected the base station identification signal ASm transmits a signal that designates the base station A102-m, for example, a base station designation signal ASm attached to a signal that is transmitted from the mobile station 106. The signal attached with the base station designation signal ASm from the mobile station 106 is transmitted from the line connection device 404 to the I / F unit 416, the analog A system transmission unit 414, the duplexer 412, and the antenna 411 to the LCX cable 104-m. When the base station A 102-m receives the signal from the mobile station 106 from the LCX cable 104-m, the base station designation signal detection unit 305 receives the signal from the mobile station 106 via the duplexer 301 and the analog A system reception unit 302. Is detected. The detected base station designation signal ASm is supplied to the control unit 321. When the control unit 321 receives this signal, the counter 322 is based on the base station ID table shown in Table 1 and the zone crossing counter No. Is incremented by 1 to “19”.

  In the control unit 321, it can be seen from the base station ID table shown in Table 1 stored in the storage unit 323 that it is still passing through the base station A 102-m, so that the control unit 321 includes the I / F unit 306. To connect the line connection device 324 to the base station 102-m. As a result, the terminal devices 405 and 406 of the mobile station 106 can communicate with the terminal devices 325 and 326 of the control station 101-B.

  Next, assuming that the mobile station 106 further travels and enters the zone 1 of the base station B 103-1, the analog A system transmission / reception unit 401 of the mobile station 106 is connected to the analog B system base station B 103-1. The signal from the existing LCX cable 105-1 cannot be received. However, the analog B system transmission / reception unit 402 of the mobile station 106 can receive a signal from the LCX cable 105-1 connected to the analog B system base station B 103-1.

  In the control unit 321 of the control station 101-B and the control unit 403 of the mobile station 106, as described above, the zone crossing counter No. 19 is counted, the next zone crossing counter No. 20, since switching from the analog A zone to the analog B zone is stored in advance in the storage units 323 and 403, the control unit 101 -B control unit 101 -B at a predetermined time when the mobile station 106 proceeds. 321 turns off the I / F unit 306, turns on the I / F unit 315, and connects the line control device 324 to the analog B system base station 103-1. Similarly, the control unit 403 of the mobile station 106 turns off the I / F unit 416, turns on the I / F unit 426, and connects the line connection device 404 to the analog B system transmission / reception unit 402. At the same time, the counters 322 and 431 of the control units 321 and 403 are incremented by 1, and the zone crossing counter No. Is “20”.

  As a result, the base station identification signal BS1 generated by the base station identification signal generator 312 in the base station B 103-1 is transmitted from the analog B system transmission unit 312 and passes through the duplexer 310 to the LCX cable 105-. 1 is transmitted.

  Therefore, the analog B system transmission / reception unit 402 of the mobile station 106 transmits / receives a signal to / from the base station B 103-1. In other words, the antenna 421 receives the radio wave from the LCX cable 105-1, and the base station identification signal detector 425 detects the base station identification signal BS1 via the duplexer 422 and the analog B system receiving unit 423. When this signal is detected, the base station identification signal detector 425 supplies the base station identification signal BS1 to the control unit 403. As a result, the line connection device 404 attaches the base station designation signal BS1 to the transmission signal and transmits it to the LCX cable 105-1 from the I / F unit 426, analog B system transmission unit 424, duplexer 422, and antenna 421. In the base station B 103-1, the signal from the mobile station 106 is supplied to the duplexer 310, the analog B system receiving unit 311, and the base station designation signal detector 314. The base station designation signal detector 314 detects the base station designation signal BS 1 transmitted from the mobile station 106 and supplies it to the control unit 321. The control unit 321 increments the counter 322 by one based on the base station designation signal BS1, Is 20. Further, as the mobile station 106 sequentially passes through the base station 103, the switching to the analog B system base station 103 described above is the same as that described for the analog A system base station 102. Description is omitted.

  Next, a method for sequentially switching base stations according to the progress of the mobile station 106 will be described. First, switching of base station A 102-1 to base station A 102- (m−1) located in the analog A system zone will be described with reference to FIG. The LCX cable at the boundary of each base station zone is as shown in FIG. In FIG. 6, the horizontal axis indicates the distance, and the vertical axis indicates the electric field strength E of the radio wave leaked from the LCX cable. Reference numeral 601 denotes an electric field strength curve of a leaked radio wave from the LCX cable 1, and reference numeral 602 denotes an electric field strength curve of a leaked radio wave from the LCX cable 2. L indicates the gap of the LCX cable and has a length of about 1 m to several m. As is apparent from FIG. 6, in the gap portion L between the LCX cables 1 and 2, the electric field strength decreases and the base station zone changes. That is, this corresponds to a change in the base station designation signal.

  This will be described by taking the base station A102- (m-2) and the base station A102- (m-1) as an example. When the mobile station 106 is moving in the zone (m-2) of the base station A102- (m-2), the analog A system receiver 413 of the analog A system transceiver 401 of the mobile station 106 is connected to the base station A102-. A sufficient level of radio waves is received from the (m-2) LCX cable 104- (m-2) (corresponding to the LCX1 shown in FIG. 6), thereby communicating with the base station A102- (m-2). Has been done. When the antenna 411 of the mobile station 106 gradually approaches the gap portion L between the LCX cables 1 and 2, the electric field strength of the leaked radio wave that can be received by the analog A system receiving unit 413 gradually decreases as shown by the electric field strength curve 601. , And decreases below the threshold Eth. This information is supplied from the analog A system receiving unit 413 to the control unit 403. In this example, the electric field strength can be measured by detecting the gain of an RF amplification unit (not shown) of the analog A system reception unit 413 input from the antenna 411, for example. The same applies to the following description.

  On the other hand, the analog A system receiver 413 of the analog A system transceiver 401 of the mobile station 106 is connected to the LCX cable 104- (m-1) (corresponding to LCX2 shown in FIG. 6) of the base station A 102- (m-1). .) Starts to be received, and as the mobile station 106 progresses, the electric field strength of the leaked radio wave that can be received by the analog A system receiving unit 413 gradually increases as indicated by the electric field strength curve 602, and finally exceeds the threshold value Eth. To increase. This information is supplied from the analog A system receiving unit 413 to the control unit 403. Therefore, in the control unit 403, when the electric field strength from the LCX cable 104- (m-2) decreases below the threshold value Eth (or the electric field strength from the LCX cable 104- (m-1) increases above the threshold value Eth. At the time), the counter 431 is incremented by 1, and the zone crossing counter No. Is “19”. In this way, the counter 431 is incremented by 1, and the zone crossing counter No. The method of incrementing by one is the same when changing other base station zones. The threshold Eth can be experimentally determined in advance.

  Next, zone switching between the base station A 102-m and the base station B 103-1 will be described. In this case, the zone switching needs to be switched from the analog A communication system to the analog B communication system. First, when the mobile station 106 is moving in the zone m of the base station A 102-m, the analog A system receiving unit 413 of the analog A system transmitting / receiving unit 401 of the mobile station 106 is connected to the LCX cable 104- of the base station A 102-m. m (corresponding to LCX1 shown in FIG. 6) is received at a sufficient level, and communication is performed with base station A 102-m. When the antenna 411 of the mobile station 106 gradually approaches the gap portion L between the LCX cables 1 and 2, the electric field strength of the leaked radio wave that can be received by the analog A system receiving unit 413 gradually decreases as shown by the electric field strength curve 601. , And decreases below the threshold Eth. This information is supplied from the analog A system receiving unit 413 to the control unit 403. Further, when the mobile station 106 advances, finally, the analog A system receiving unit 413 cannot receive the signal of the base station A 102-m. Of course, the analog A system receiving unit 413 cannot communicate with the analog B system base station B 103-1 having a different communication system.

  Therefore, in this example, the timing shown in Table 2 is set for the timing of switching from the analog A communication system to the analog B communication system.

即ち、表２に示すようにアナログＡ方式受信部４１３で受信できる漏洩電波の電界強度Ｅ（図６の電界強度曲線６０１で示される電界強度）が次第に減少し、閾値Ｅｔｈ以下（Ｅ≦Ｅｔｈ）となった場合、制御部４０３は、記憶部４３２に記憶されているゾーン渡りカウンタＮｏ．を参照し、その時点で、ゾーン渡りカウンタＮｏ．が“１９”であれば、制御部４０３は、Ｉ／Ｆ部４１６をＯＦＦし、Ｉ／Ｆ部４２６をＯＮする。これによってアナログＢ方式送受信部４０２が回線接続装置４０４に接続される。その結果、移動局１０６のアナログＢ方式送受信部４０２のアナログＡ方式受信部４２３には、基地局Ｂ１０３−１のＬＣＸケーブル１０５−１（図６のＬＣＸ２に相当する。）からの信号が受信され始め、移動局１０６の進行に従って、アナログＢ方式受信部４２３で受信できる漏洩電波の電界強度が電界強度曲線６０２で示されるように次第に増加する。これによって移動局１０６のアナログＢ方式送受信部４０２は、アナログＢ方式の基地局Ｂ１０３−１と通信を行うことができる。

That is, as shown in Table 2, the electric field intensity E (the electric field intensity indicated by the electric field intensity curve 601 in FIG. 6) of the leaked radio wave that can be received by the analog A system receiving unit 413 gradually decreases and is equal to or less than the threshold Eth (E ≦ Eth). In this case, the control unit 403 controls the zone crossing counter No. stored in the storage unit 432. At that time, the zone crossing counter No. If “19”, the control unit 403 turns off the I / F unit 416 and turns on the I / F unit 426. As a result, the analog B system transmission / reception unit 402 is connected to the line connection device 404. As a result, the analog A system receiver 423 of the analog B system transceiver 402 of the mobile station 106 receives a signal from the LCX cable 105-1 (corresponding to LCX2 in FIG. 6) of the base station B 103-1. First, as the mobile station 106 advances, the electric field strength of the leaked radio waves that can be received by the analog B system receiver 423 gradually increases as indicated by the electric field strength curve 602. As a result, the analog B system transmission / reception unit 402 of the mobile station 106 can communicate with the analog B system base station B 103-1.

  As described above, to connect an analog B wireless communication system to an analog A wireless communication system, it is necessary to change the configuration of the control station 101 or the configuration of the base station 103. Significant construction period and cost are required. However, the wireless communication system used in public institutions such as trains has a problem that the system cannot be stopped for a long time. Similarly, such a problem occurs when the digital method is adopted as the analog method. Furthermore, similar problems occur in the case of system maintenance, inspection, or replacement of defective parts.

  The present invention provides a method for solving these problems, and an embodiment of the present invention will be described below with reference to the drawings. FIG. 7 shows a block diagram of a schematic configuration of one embodiment of the present invention, and shows a specific configuration of the control station B and the base stations Am and B1 shown in FIG. In addition, the same code | symbol is attached | subjected to the same thing as FIG. In FIG. 7, reference numeral 701 denotes the control station B. 702-m and 703-1 indicate the base station Am and the base station B1, respectively, and the base station 702-m and the base station 703-1 indicate mounting boards on which components such as circuits are mounted, respectively. Each mounting board may be composed of one mounting board, or may be composed of a plurality of mounting boards depending on the scale. In this embodiment, a description will be given with one mounting board. . The same applies to the following embodiments. Further, in the present embodiment, the control station B, the base station 702-m, and the base station 703-1 are described, but the same applies to other control stations and other base stations, and thus description thereof is omitted.

  A system microcomputer 704 controls the board 702-m of the control station B and the base station Am and the board 703-1 of the base station B1. The system microcomputer 704 incorporates the function of the control unit 321 shown in FIG. Reference numeral 705 denotes, for example, a bus line through which various signals are transmitted. The I / Fs 306 and 315 are connected to the bus line 705. The bus line 705 can also be configured by a transmission path such as a LAN (Local Area Network).

  Reference numerals 706-1 and 706-2 denote substrate attachment / detachment mechanisms, and 707 denotes a substrate attachment / detachment detection unit. The substrate attachment / detachment detection unit 707 detects the attachment / detachment state of the substrates 702-m, 703-1 from the substrate attachment / detachment mechanism units 706-1, 706-2, and sends this detection signal to the system microcomputer 704. Reference numeral 715 denotes a power supply unit. The power supplied from the power supply unit 715 supplies power to the substrates 702-m and 703-1 via the substrate attaching / detaching mechanism units 706-1 and 706-2. The power supply / removal of the substrate attaching / detaching mechanism units 706-1 and 706-2 is configured by a stopcock insertion / removal mechanism that allows the substrate to be attached / detached when the power is on, and the power supply unit is attached when the substrates 702-m and 703-1 are attached / detached. There is a feature that it is not necessary to turn on / off the power source 715. Of course, the power supply unit 715 can be turned ON / OFF by the system microcomputer 704 when the boards 702-m and 703-1 are attached and detached. Reference numeral 708 denotes an operation display unit, and 709 denotes a storage unit.

  Reference numerals 710-1 and 710-2 denote microcomputers that control the boards 702-m and 703-1, respectively. 711-1 and 711-2 are bus lines connected to the microcomputers 710-1 and 710-2, respectively, and 712-1 and 712-2 are I / Fs. Reference numerals 713-1 and 713-2 denote connectors, for example, connectors configured to be detachable from the LCX cables 104-m and 105-1 shown in FIG. 3.

  Next, the operation of the configuration of FIG. 7 will be described. In FIG. 7, a system microcomputer 704 is connected to a microcomputer 710-1 on a board 702-m and a microcomputer 710-2 on a board 703-1 via a bus line 705 and board attaching / detaching mechanisms 706-1 and 706-2. Yes. The operation data operated on the operation display unit 708 is transmitted to the microcomputers 710-1 and 710-2 via the system microcomputer 704. On the other hand, the microcomputers 710-1 and 710-2 control the operations of the base 702-m and the board 703-1 based on the control from the system microcomputer 704, and if necessary, the microcomputers 710-1 and 710-2 Data is also sent to the system microcomputer 704.

  Now, in this state, it is assumed that, for example, the substrate 703-1 needs to be replaced as a result of the system change or the maintenance inspection of the substrate 702-m or the substrate 703-1 as described above. In this case, the operator operates the operation display unit 708 of the control station B 701 to instruct the system microcomputer 704 to stop the operation of the board 703-1. The system microcomputer 704 instructed to stop the operation reads the operation data and setting data immediately before the operation stop of the board 703-1 from the microcomputer 710-2 of the board 703-1 via the bus line 705, and also stores it in the storage unit 709. Remember. Then, the microcomputer 710-2 is stopped. Here, the operation data, setting data, and the like are, for example, the frequency received by the base station B1, F2, the frame configuration T2, the base station identification signal BS1, and the like as described with reference to FIG. As a result, the system microcomputer 704 stores the operation data, setting data, and the like immediately before the operation stop, and therefore operates the substrate attaching / detaching mechanism unit 706-2 to separate the substrate 703-1 from the control station B701. At the same time, the connector 713-2 is disconnected from the LCX cable 105-1.

  Next, a new substrate is mounted instead of the substrate 703-1. This will be described with reference to FIG. FIG. 8 shows a substrate 801 to be replaced with the substrate 703-1. In FIG. 8, 802 is a microcomputer, 803 is a bus line, 804 is an I / F, 805 is a connector, 806 is a duplexer, 807 is a receiver, 808 is a transmitter, and 809 is a base station. It is an identification signal generator. The board 801 is mounted instead of the board 703-1 shown in FIG. The substrate 801 is a substrate that has not been set with any data yet, or has been erased when old data or settings have been set. Then, the board attaching / detaching mechanism portion 706-2 and the connector 805 are operated to connect the board 801 to the control station B 701. When the substrate 801 is connected, as described above, the substrate attaching / detaching mechanism portion 706-2 is constituted by a stopcock insertion / removal mechanism that allows the substrate to be attached / detached, so that power from the power supply portion 708 is supplied to the substrate 801. . The substrate attachment / detachment detection unit 707 detects that the substrate 801 is attached to the substrate attachment / detachment mechanism unit 706-2 and transmits a detection signal to the system microcomputer 704.

  Receiving this detection signal, the system microcomputer 704 first transmits operation data, setting data, etc. immediately before the operation stop of the board 703-1 to the microcomputer 802 of the board 801 via the bus line 705 and the board attaching / detaching mechanism section 706-2. To do. Therefore, the microcomputer 802 initializes each component mounted on the substrate 801 and then based on the operation data and setting data immediately before the operation stop of the substrate 703-1 transmitted from the system microcomputer 704, the substrate 801. Set each part. That is, for the receiver 807, for example, the reception frequency is set to F2 and the frame configuration is set to T2, and for the transmitter 808, the transmission frequency is set to F2 and the frame configuration is set to T2. Further, the base station identification signal generator 809 is set to be the base station identification signal BS1. As a result, the new board 801 can operate normally as an analog B base station B1.

  In the above embodiment, a new board 801 shown in FIG. 8 is installed instead of the board 703-1 of the analog B base station B1, and the operation immediately before the operation of the board 703-1 transmitted from the system microcomputer 704 is performed. The case where each component mounted on the board 801 is set based on data and setting data and operates as the board 801 of the analog B base station B1 has been described. For example, the analog A base station Am When replacing the board 702-m of FIG. 8 with the board 801 shown in FIG. The data is read into the microcomputer 704 and stored in the storage unit 709. Thereafter, the board 702-m is replaced with a new board 801, and then the receiver 807, for example, receives the frequency F1 and the frame based on the operation data and setting data immediately before the board 702-m stops. The configuration is set to T1, and for the transmitter 808, the transmission frequency is set to F1, and the frame configuration is set to T1. Also, the base station identification signal generator 809 is set to be the base station identification signal ASm. As a result, the new board 801 can be operated normally as an analog A-type base station Am. Since the same applies to the boards of other base stations, detailed description will be omitted.

  Next, as for the mobile station 106, the system change and the maintenance inspection can be easily performed by exchanging the boards in the same manner as the base station. Hereinafter, this will be described with reference to FIG. FIG. 9 shows a block diagram of a schematic configuration of an embodiment of a mobile station. In FIG. 9, reference numeral 901 denotes a system microcomputer, which includes the control unit 403 in FIG. 902 is a bus line, 903-1 and 903-2 are substrate attachment / detachment mechanisms, 904 is a substrate attachment / detachment detection unit, 905 is an operation display unit, 906 is a storage unit, 907 is an I / F, and 908 is It is a power supply part. Reference numeral 911-1 denotes, for example, an analog A system transceiver board, and 911-2 denotes an analog B system transceiver board. 912-1 and 912-2 are microcomputers, 913-1 and 913-2 are bus lines, and 914-1 and 914-2 are I / Fs. In addition, the same code | symbol is attached | subjected to the same thing as FIG.

  Next, the operation of the configuration of FIG. 9 will be described. In FIG. 9, a system microcomputer 901 is connected to the microcomputer 912-1 on the board 911-1 and the microcomputer 912-2 on the board 911-2 via the bus line 902 and the board attaching / detaching mechanisms 903-1 and 903-2. Yes. The operation data operated on the operation display unit 905 is transmitted to the microcomputers 912-1 and 912-2 via the system microcomputer 901. On the other hand, the microcomputers 912-1 and 912-2 control the operations of the base 911-1 and the board 911-2 based on the control from the system microcomputer 901, and the microcomputers 912-1 and 912-2 as necessary. Data is also sent to the system microcomputer 901.

  In this state, it is assumed that the substrate 911-2 or the substrate 911-2 needs to be replaced, for example, as a result of the system change or the maintenance inspection as described above. In this case, the operator operates the operation display unit 905 of the mobile station 106 and instructs the system microcomputer 901 to stop the operation of the board 911-2. The system microcomputer 901 instructed to stop the operation reads the operation data and the setting data immediately before the operation stop of the board 911-2 from the microcomputer 912-2 of the board 911-2 via the bus line 902, and also stores it in the storage unit 906. Remember. Then, the microcomputer 912-2 is stopped. Here, the operation data, the setting data, and the like are, for example, the frequency F2 received from the base station B1, the frame configuration T2, and the like as described with reference to FIG. As a result, the system microcomputer 901 stores the operation data, setting data, and the like immediately before the operation stop, and therefore operates the substrate attaching / detaching mechanism unit 903-2 to disconnect the substrate 911-2 from the mobile station 106. Needless to say, the antenna 421 is configured to be detachable although not shown. The same applies to the following embodiments.

  Next, a new board is mounted instead of the board 911-2. This will be described with reference to FIG. FIG. 10 shows a substrate 1001 to be replaced with the substrate 911-2. In FIG. 10, 1002 is a microcomputer, 1003 is a bus line, 1004 is an I / F, 1005 is a duplexer, 1006 is a receiver, 1007 is a transmitter, 1008 is a base station identification signal detector, Reference numeral 1009 denotes an antenna. The board 1001 is mounted instead of the board 912-2 shown in FIG. The substrate 1001 is a substrate that has not yet been set with any data, or has been erased when old data or settings have been made. Then, the board attachment / detachment mechanism 903-2 is operated to connect the board 1001 to the mobile station 106. When the substrate 1001 is connected, the substrate attaching / detaching mechanism portion 903-2 is configured by a stopcock insertion / removal mechanism that can attach and detach the substrate as already described with reference to FIG. Supplied. The substrate attachment / detachment detection unit 904 detects that the substrate 1001 is attached to the substrate attachment / detachment mechanism unit 903-2, and transmits a detection signal to the system microcomputer 901.

  Receiving this detection signal, the system microcomputer 901 first transmits the operation data and setting data immediately before the operation stop of the substrate 911-2 to the microcomputer 1002 of the substrate 1001 via the bus line 902 and the substrate attaching / detaching mechanism unit 903-2. To do. Therefore, the microcomputer 1002 initializes each component mounted on the board 1001, and then, based on the operation data and setting data immediately before the operation stop of the board 911-2 transmitted from the system microcomputer 901, the board 1001. Set each part. That is, for the receiver 1006, for example, the reception frequency is set to F2 and the frame configuration is set to T2, and for the transmitter 1007, the transmission frequency is set to F2 and the frame configuration is set to T2. As a result, the new board 1001 can normally receive a signal from the analog B base station.

  FIG. 11 is a block diagram showing a schematic configuration of a wireless communication system for explaining another embodiment of the present invention. In the example shown in FIG. 11, although all are digital systems, the case where the digital A system and the digital B system coexist is shown. In FIG. 11, reference numeral 1101-A denotes a digital A type control station. 1101-B represents a control station in which the digital A system and the digital B system are mixed. Reference numeral 1101-C denotes a digital B system control station. In addition, when representing a digital control station, it is referred to as a digital control station 1101. 1102- (m-4), 1102- (m-3), 1102- (m-2), 1102- (m-1), 1102-m are digital base station A (m-4) and digital base, respectively. Station A (m-3), digital base station A (m-2), digital base station A (m-1), and digital base station Am are represented. When a digital A base station is represented, it is referred to as a digital base station A702. 1103-1, 1103-2, 1103-3, and 1103-4 represent the digital base station B1, the digital base station B2, the digital base station B3, and the digital base station B4, respectively. In addition, when representing a digital B system base station, it is referred to as a digital base station B1103. 1104- (m-4), 1104- (m-3), 1104- (m-2), 1104- (m-1), 1104-m are LCX (m-4) and LCX (m-3), respectively. ), LCX (m-2), LCX (m-1), and LCXm. In addition, when representing LCX, it is called LCX1104. Reference numerals 1105-1, 1105-2, 1105-3, and 1105-4 denote LCX1, LCX2, LCX3, and LCX4, respectively. In addition, when representing LCX, it is called LCX1105. Reference numeral 1106 denotes a mobile station such as a train.

  Now, the digital control station 1101, digital base station A 1102, digital base station B 1103, LCX 1104, and LCX 1105 described above are connected by transmission paths as shown in FIG. 11, and communication zones (m-4), (m− 3), (m-2), (m-1), m, 1, 2, 3, and 4 are arranged separately. 1104 and 1105 are laid along, for example, railroad tracks, and communication between the mobile station 1106 and the digital base station A 1102 and digital base station B 1103 is performed via these LCXs 1104 and 1105.

  The digital radio communication system shown in FIG. 11 is almost the same as the analog radio communication system shown in FIG. In other words, the digital wireless communication system is the same as the analog wireless communication system except that the circuit configuration is entirely a digital circuit and the transmitted signal is also a digital signal. The mobile station 1106 is also composed of digital circuits, and is substantially the same as the analog mobile station shown in FIG. That is, since the analog A system transmission / reception unit is changed to a digital A system transmission / reception unit and the analog B system transmission / reception unit is changed to a digital B system transmission / reception unit, the description of the configuration of the digital mobile station is omitted. To do. The operation of the digital wireless communication system is also similar to the analog method. Therefore, since the technology of the substrate attaching / detaching method of the present invention described above with reference to FIGS. 7 to 10 can be applied only by changing the circuit configuration to the digital method, detailed description is omitted.

  FIG. 12 is a block diagram showing a schematic configuration of a wireless communication system for explaining still another embodiment of the present invention. In the example shown in FIG. 12, the case where a digital system and an analog system coexist is shown. In FIG. 12, reference numeral 1201-A denotes a digital A type control station, which is the same as the digital A type control station 1101-A shown in FIG. Reference numeral 1201-B denotes a control station in which a digital A system and an analog B system are mixed. This will be described later. Reference numeral 1201-C denotes an analog B system control station, which is the same as the analog B system control station 101-C shown in FIG. 1202− (m−4), 1202− (m−3), 1202− (m−2), 1202− (m−1), and 1202−m represent digital A type base stations, and are shown in FIG. Digital base station A1102- (m-4), digital base station A1102- (m-3), digital base station A1102- (m-2), digital base station A1102- (m-1), digital base station A1102-m Corresponding to In addition, when representing a digital base station, it is referred to as a digital base station A1202. 1203-1, 1203-2, 1203-3, and 1203-4 represent the analog base station B, and the analog base station B103-1, the analog base station B103-2, and the analog base station B103- shown in FIG. 3 corresponds to the analog base station B103-4. In addition, when representing an analog base station, it is referred to as an analog base station B 1203.

  1204- (m-4), 1204- (m-3), 1204- (m-2), 1204- (m-1), 1204-m are leaky coaxial cables LCX (m-4), LCX (m-3), LCX (m-2), LCX (m-1), LCXm are represented, and the leaky coaxial cables LCX1104- (m-4), LCX1104- (m-3), LCX1104- shown in FIG. This corresponds to (m-2), LCX1104- (m-1), and LCX1104-m. 1205-1, 1205-2, 1205-3, and 1205-4 represent LCX1, LCX2, LCX3, and LCX4, respectively, and correspond to the LCX105-1, LCX105-2, LCX105-3, and LCX105-4 shown in FIG. . Reference numeral 1206 denotes a mobile station.

  Now, the digital control station 1201-A, the control station 1201-B, the analog control station 1201-C, the digital base station A 1202, the analog base station B 1203, the LCX 1204, and the LCX 1205 described above are connected by transmission lines as shown in FIG. In addition, the communication zones are arranged separately. The LCXs 1204 and 1205 are laid along, for example, railway lines, and communication between the mobile station 1206, the digital base station A 1202, and the analog base station B 1203 is performed via these LCXs 1204 and 1205.

  FIG. 13 shows a block diagram of a schematic configuration of another embodiment of the present invention, and shows a block diagram of a schematic configuration of a part of the control station 1201-B and the digital base station A 1202-m and the analog base station B 1203-1. Show. The digital base station A 1202-m and the analog base station B 1203-1 are located in a zone where the digital A system zone is switched to the analog B system zone. In FIG. 13, 1201 -B indicates the control station B. 1202-m and 1203-1 indicate the base station Am and the base station B1, respectively, and the base station 1202-m and the base station 1203-1 each indicate a mounting board on which components such as a circuit are mounted. Each mounting board may be composed of one mounting board, or may be composed of a plurality of mounting boards depending on the scale. In this embodiment, a description will be given with one mounting board. . Further, in the present embodiment, the control station 1201-B, the base station Am, and the base station B1 are described, but the same applies to other control stations and other base stations, and thus the description thereof is omitted.

  Reference numeral 1331 denotes a system microcomputer, which controls the control station 1201-B and the board 1202-m of the base station Am and the board 1203-1 of the base station B1. The system microcomputer 1332 incorporates the function of the control unit 321 shown in FIG. Reference numeral 1343 denotes, for example, a bus line through which various signals are transmitted. The I / Fs 1336 and 1337 are connected to the bus line 1343. The bus line 1343 can also be configured by a transmission path such as a LAN (Local Area Network).

  Reference numerals 1338 and 1339 denote substrate attachment / detachment mechanisms, and 1340 denotes a substrate attachment / detachment detection unit. The substrate attachment / detachment detection unit 1340 detects the attachment / detachment state of the substrates 1202-m and 1203-1 from the substrate attachment / detachment mechanism units 1338 and 1339, and sends this detection signal to the system microcomputer 1331. Reference numeral 1341 denotes a power supply unit. The power supplied from the power supply unit 1341 supplies power to the substrates 1202-m and 1203-1 via the substrate attaching / detaching mechanism units 1338 and 1339. The power supply of the board attaching / detaching mechanism sections 1338 and 1339 is constituted by a stopcock insertion / removal mechanism that can attach and detach the board in the power-on state, and the power of the power supply section 1341 is turned on when the boards 1202-m and 1203-1 are attached and detached. There is a feature that does not need to be turned ON / OFF. However, the power supply unit 1341 can be turned ON / OFF by the system microcomputer 1331 when the boards 1202-m and 1203-1 are attached and detached. 1333 is a line connection device, 1334 and 1335 are terminal devices, 1332 is an operation display unit, and 1342 is a storage unit.

  On the board 1202-m of the digital base station Am, a connector 1301, an antenna duplexer 1302, a digital A system receiver ARx1303, a digital A system transmitter ATx1304, a base station identification signal ASm, for example, if m is 20, a digital signal A base station identification signal generator 1305 for generating “10100” (digital signal corresponding to analog number 20) is mounted. Reference numeral 1306 denotes a DAC (digital / analog converter) which converts a digital signal of the digital A system receiver ARx 1303 into an analog signal and supplies the analog signal to the I / F 1308. Reference numeral 1307 denotes an ADC (analog / digital converter) which converts an analog output signal from the I / F 1308 into a digital signal and supplies the digital signal to a digital A system transmitter ATx1304. Reference numeral 1309 denotes a microcomputer, which is connected to the I / F 1308 via the bus line 1310.

  The board 1203-1 of the analog base station B1 is the analog base station B1 that is connected to the LCX 1205-1 via the connector 1321 and constitutes the LCX zone 1 of the LCX 1205-1. The board 1203-1 of the analog base station B1 includes an antenna duplexer 1322, an analog B system receiver BRx1323, an analog B system transmitter BTx1324, a base station identification signal BS1, for example, A base station identification signal generator 1325 for generating 21 and a microcomputer 1327 are mounted. The microcomputer 1327 is connected to the I / F 1326 via the bus line 1328.

  Next, the operation of the configuration of FIG. 13 will be described. In FIG. 13, a system microcomputer 1331 is connected to a microcomputer 1309 on the board 1202-m and a microcomputer 1327 on the board 1203-1 via a bus line 1343 and board attaching / detaching mechanisms 1338 and 1339. The operation data operated on the operation display unit 1332 is transmitted to the microcomputers 1309 and 1327 via the system microcomputer 1331. On the other hand, the microcomputers 1309 and 1327 control the operations of the base 1202-m and the board 1203-1 based on the control from the system microcomputer 1331, and send the data of the microcomputers 1309 and 1327 to the system microcomputer 1331 as necessary. ing.

  In this state, it is assumed that the substrate 1202-m or the substrate 1203-1 needs to be replaced, for example, as a result of the system change or the maintenance inspection as described above. In this case, the operator operates the operation display unit 1332 of the control station 1201-B to instruct the system microcomputer 1331 to stop the operation of the board 1202-m. The system microcomputer 1331 instructed to stop the operation reads the operation data and the setting data immediately before the operation stop of the board 1202-m from the microcomputer 1309 of the board 1202-m via the bus line 1343 and stores it in the storage unit 1342. . Then, the microcomputer 1309 is stopped. Here, the operation data, setting data, and the like are, for example, the frequency received by the base station Am, F1, the frame configuration T1, the base station identification signal ASm, and the like as described with reference to FIG. In the board 1202-m, these operation data and setting data are digital data. As a result, the system microcomputer 1331 stores the operation data, setting data, and the like immediately before the operation stop, and therefore operates the substrate attaching / detaching mechanism unit 1338 to separate the substrate 1202-m from the control station 1201-B. At the same time, the connector 1301 is disconnected from the LCX cable 1204-m.

  Next, a new board is mounted instead of the board 1202-m. This will be described with reference to FIG. FIG. 14 shows a substrate 1401 to be replaced with the substrate 1202-m. 14, 1402 is a microcomputer, 1403 is a bus line, 1404 is an I / F, 1405 is a connector, 1406 is a duplexer, 1407 is a receiver, 1408 is a transmitter, 1409 is a base station. An identification signal generator, 1410 is a DAC, and 1411 is an ADC. The board 1401 is mounted instead of the board 1202-m shown in FIG. The board 1401 is a board that has not been set with any data yet, or has been erased when new board or old data is written or set. Then, the board attaching / detaching mechanism 1338 and the connector 1405 are operated to connect the board 1401 to the control station 1201-B. When the substrate 1401 is connected, the substrate attaching / detaching mechanism portion 1338 is constituted by a stopcock insertion / removal mechanism that can attach and detach the substrate, as described above, so that power from the power supply portion 1341 is supplied to the substrate 1401. Further, the board attachment / detachment detection unit 1340 detects that the board 1401 is attached to the board attachment / detachment mechanism unit 1338 and transmits a detection signal to the system microcomputer 1331.

  Receiving this detection signal, the system microcomputer 1331 transmits operation data, setting data, etc. immediately before the operation of the board 1202-m is stopped to the microcomputer 1402 of the board 1401 via the bus line 1343 and the board attaching / detaching mechanism 1338. Therefore, the microcomputer 1402 initializes each component mounted on the board 1401, and then, based on the operation data and the setting data immediately before the operation stop of the board 1202-m transmitted from the system microcomputer 1331, the board 1401. Operation data is written and data is set in each part 1401. That is, for the receiver 1407, for example, the frequency received by the digital receiver is set to F1 and the frame configuration is set to T1, and for the transmitter 1408, the frequency transmitted by the digital transmitter is F1 and the frame configuration is set to T1. Set to. Further, the base station identification signal generator 1409 is set to be a digital base station identification signal ASm. As a result, the new board 1401 can operate normally as a digital A type base station Am.

  In the above embodiment, it has been described that the new board 1401 shown in FIG. 14 is installed instead of the board 1202-m of the digital A base station Am, but for example, the board 1203 of the analog B base station B1. It goes without saying that the same configuration can be applied when the new substrate 801 shown in FIG.

  Next, still another embodiment of the present invention will be described with reference to FIGS. In the present embodiment, the mobile station 106 in a system in which a digital A system and an analog B system are mixed can be easily changed and maintained by replacing the board in the same manner as the base station. . In FIG. 15, reference numeral 1501 denotes a digital A type transmission / reception unit substrate. The digital A system transmission / reception unit board 1501 receives digital signals from the microcomputer 1502, the bus line 1503, the I / F 1504, the duplexer 1505, the digital A system reception unit 1506, the digital A system transmission unit 1507, and the digital A system reception unit 1506. A DAC (digital / analog converter) 1508 for converting to an analog signal, a base station identification signal detector 1510 for detecting a base station identification signal, an analog signal output from the I / F unit 1504 is converted to a digital signal output, and a digital A An ADC (analog / digital converter) 1509 is supplied to the system transmission unit 1507. In addition, the same code | symbol is attached | subjected to the same thing as FIG.

  The operation of the configuration of FIG. 15 will be described. In FIG. 15, a system microcomputer 901 is connected to a microcomputer 1502 on a board 1501 and a microcomputer 912-2 on a board 911-2 via a bus line 902 and board attaching / detaching mechanisms 903-1 and 903-2. The operation data operated on the operation display unit 905 is transmitted to the microcomputers 1502 and 912-2 via the system microcomputer 901. On the other hand, the microcomputers 1502 and 912-2 control the operations of the base 1501 and the board 911-2 based on the control from the system microcomputer 901, and the data of the microcomputers 1502 and 912-2 are also transferred to the system microcomputer 901 as necessary. Sending out.

  In this state, it is assumed that the substrate 1501 or the substrate 911-2 needs to be replaced, for example, as a result of system change or maintenance inspection as described above. In this case, the operator operates the operation display unit 905 of the mobile station 106 and instructs the system microcomputer 901 to stop the operation of the substrate 1502. The system microcomputer 901 instructed to stop the operation reads operation data and setting data immediately before the operation stop of the substrate 1501 from the microcomputer 1502 of the substrate 1501 via the bus line 902 and stores it in the storage unit 906. Then, the microcomputer 1502 is stopped. Here, the operation data, the setting data, and the like are, for example, the frequency F1, the frame configuration T1, etc. received from the digital base station Am as described in FIG. As a result, the system microcomputer 901 stores operation data, setting data, and the like immediately before the operation is stopped, and thus operates the substrate attaching / detaching mechanism unit 903-1 to separate the substrate 1501 from the mobile station 106.

  Next, a new substrate is mounted instead of the substrate 1501. This will be described with reference to FIG. FIG. 16 shows a substrate 1601 to be replaced with the substrate 1501. In FIG. 16, 1602 is a microcomputer, 1603 is a bus line, 1604 is an I / F, 1605 is a duplexer, 1606 is a receiver, 1607 is a transmitter, 1608 is a DAC (digital / analog converter). 1609 is an ADC (analog / digital converter), 1610 is a base station identification signal detector, and 1611 is an antenna. The board 1601 is mounted instead of the board 1501 shown in FIG. Note that this substrate 1601 is a substrate that has not been written or set any data, or has been erased when old data has been written or set, as in the case described above. . Then, the board attachment / detachment mechanism unit 903-1 is operated to connect the board 1601 to the mobile station 106. When the substrate 1601 is connected, as already described in FIG. 9, the substrate attaching / detaching mechanism portion 903-1 is constituted by a stopcock insertion / removal mechanism that can attach and detach the substrate, so that power from the power supply portion 908 is supplied to the substrate 1601. Supplied. The board attachment / detachment detection unit 904 detects that the board 1601 is attached to the board attachment / detachment mechanism unit 903-1, and transmits a detection signal to the system microcomputer 901.

  Receiving this detection signal, the system microcomputer 901 first transmits operation data, setting data, etc. immediately before the operation of the substrate 1501 is stopped to the microcomputer 1602 of the substrate 1601 via the bus line 902 and the substrate attaching / detaching mechanism unit 903-1. Therefore, the microcomputer 1602 initializes each component of the board 1601, and then transmits data to each component of the board 1601 based on the operation data and the setting data immediately before the operation stop of the board 1501 transmitted from the system microcomputer 901. Write and set data. That is, for the receiver 1606, for example, the reception frequency is set to F1 and the frame configuration is set to T1, and for the transmitter 1607, the transmission frequency is set to F1 and the frame configuration is set to T1. As a result, the new board 1601 can normally receive a signal from the digital A base station Am. In addition, when replacing | exchanging an analog B system transmission-and-reception part board | substrate, it cannot be overemphasized that it replaces with the new board | substrate shown in FIG. 10 as mentioned above, and can be comprised similarly to the above-mentioned.

  Although the present invention has been described in detail above, the present invention is not limited to the embodiments of the wireless communication system described here, and systems having different systems such as wireless communication systems other than the above are mixed. Needless to say, even a case system can be easily adapted.

1 is a block diagram of a schematic configuration of a wireless communication system for explaining the present invention. FIG. 2 shows a block diagram of a schematic configuration of a control station and a base station of the wireless communication system shown in FIG. FIG. 2 is a block diagram of a schematic configuration of a control station and other base stations of the wireless communication system shown in FIG. 1. FIG. 2 shows a block diagram of a schematic configuration of a mobile station in the wireless communication system shown in FIG. 1. The block diagram of schematic structure of an example of the conventional radio | wireless communications system is shown. It is a figure which shows the electric field strength distribution for demonstrating operation | movement of the radio | wireless communications system shown in FIG. The block diagram of schematic structure of one Example of this invention is shown. The block diagram of schematic structure of one Example of the board | substrate used in the Example of FIG. 7 is shown. The block diagram of schematic structure of other one Example of this invention is shown. FIG. 10 is a block diagram of a schematic configuration of an embodiment of a substrate used in the embodiment of FIG. The block diagram of schematic structure of the radio | wireless communications system for demonstrating the other Example of this invention is shown. The block diagram of schematic structure of the radio | wireless communications system for demonstrating the further another Example of this invention is shown. The block diagram of schematic structure of other one Example of this invention is shown. The block diagram of schematic structure of one Example of the board | substrate used in the Example of FIG. 13 is shown. The block diagram of schematic structure of one more Example of this invention is shown. The block diagram of schematic structure of one Example of the board | substrate used in the Example of FIG. 15 is shown.

Explanation of symbols

  101, 1201: Control station, 102, 103: Base station, 104, 105, 501, 502, 1104, 1105, 1204, 1205: Leaky coaxial cable, 106, 1106, 1206: Mobile station, 201, 210, 301, 310 412, 422, 532, 806, 1005, 1302, 1322, 1406, 1505, 1605: Duplexer, 202, 211, 302, 413: Analog A system receiver, 203, 212, 303, 414: Analog A system transmission 204, 213, 304, 313, 508, 512, 809, 1305, 1325, 1409: base station identification signal generator, 220, 321, 403: control unit, 221, 222, 305, 314, 415, 425, 521, 522, 1008, 1510, 1610: Base station designation signal detection , 223, 224, 523, 524: Switch, 225, 324, 404, 525, 536, 1333: Line connection device, 226, 227, 325, 326, 405, 406, 526, 527, 1334, 1335: Terminal Devices, 311, 423: analog B system receiver, 312, 424: analog B system transmitter, 306, 315, 416, 426, 712, 804, 907, 914, 1004, 1308, 1326, 1336, 1337, 1404, 1504: I / F, 322, 431: Counter, 323, 432, 709, 906, 1342: Storage unit, 401: Analog A system transmission / reception unit, 402: Analog B system transmission / reception unit, 411, 421, 531, 1009: Antenna 503: Base station A, 504: Base station B, 506, 510, 533, 07, 1006, 1407: receiver, 507, 511, 534, 808, 1007, 1408: transmitter, 520: control device, 701: control station B, 702, 703, 801, 911, 1001, 1401, 1501, 1601, 1601 : Board, 704, 901, 1331: System microcomputer, 705, 711, 803, 902, 913, 1003, 1310, 1328, 1343, 1403, 1503: Bus line, 706, 903, 1338, 1339: Board attachment / detachment mechanism 707, 904, 1340: board attachment / detachment detection unit, 708, 905, 1332: operation display unit, 710, 802, 912, 1002, 1309, 1327, 1402, 1502, 1602: microcomputer, 713, 805, 1301, 1321, 1405 : Connector, 715, 908, 13 41: power supply unit, 1101: digital control station, 1102, 1103, 1202: digital base station, 1203: analog base station, 1207, 1306, 1410, 1508, 1608: DAC, 1303, 1506: digital A system receiving unit, 1304 1507: Digital A system transmission unit, 1307, 1411, 1509, 1609: ADC, 1323: Analog B system reception unit, 1324: Analog B system transmission unit, 1606: Digital reception unit, 1607: Digital transmission unit.

Claims (4)

  In a wireless communication system having a control station, a plurality of base stations connected to the control station, and a mobile station connected to the base station via a radio channel, the base station has a detachable first board. And a first transmission / reception unit for transmitting / receiving to / from the mobile station and a first microcomputer for controlling the first transmission / reception unit on the first substrate. A first line connection device to which a signal from the transmitter / receiver unit is input, a first board attaching / detaching mechanism part for detachably attaching the first board of the base station, and the first board attaching / detaching mechanism part. A first system microcomputer connected to the first microcomputer, and when removing the first board of the base station from the first board attaching / detaching mechanism, the first system microcomputer Data of the first transmitter / receiver immediately before removing the first board of the station. Wireless communication system characterized by storing from the first microcomputer reads the storage unit of the first system microcomputer to.   2. The wireless communication system according to claim 1, wherein the first system is removed when the first board is detached from the first board attaching / detaching mechanism and the second board is attached to the first board attaching / detaching mechanism. The microcomputer writes the data of the said 1st transmission / reception part read from the said 1st microcomputer into the 2nd microcomputer on the said 2nd board | substrate, The radio | wireless communications system characterized by the above-mentioned.   In a wireless communication system having a control station, a plurality of base stations connected to the control station, and a mobile station connected to the base station via a radio channel, the mobile station has a detachable second board. And a second transceiver for transmitting / receiving to / from the base station and a second microcomputer for controlling the second transmitter / receiver on the second board, wherein the mobile station is connected to the second board. A second line connection device to which a signal from the second transmission / reception unit is input; a second substrate attaching / detaching mechanism portion for attaching the second substrate to the mobile station in a removable manner; and the second substrate attaching / detaching mechanism. A second system microcomputer connected to the second microcomputer via a unit, and when removing the second board of the mobile station from the second board attaching / detaching mechanism, the second system microcomputer is The second transmission / reception immediately before removing the second board of the mobile station Wireless communication system, wherein a part of the data stored from the second microcomputer reads, in the storage unit of the second system microcomputer.   4. The wireless communication system according to claim 3, wherein when the second board is removed from the second board attaching / detaching mechanism and the third board is attached to the second board attaching / detaching mechanism, the second system is provided. The microcomputer writes the data of the said 2nd transmission / reception part read from the said 2nd microcomputer to the 3rd microcomputer on the said 3rd board | substrate, The radio | wireless communications system characterized by the above-mentioned.

Images