JP2005260772A - Radio communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that a conventional taxi allocating AVM system can not communicate information such as destination to a taxi driver even if a customer informs such information when he or she requests a management center to allocate a taxi, and the destination of the customer who rides on the taxi is unknown until he or she gets on the taxi. <P>SOLUTION: In a radio communication system of collecting information of a base station and a plurality of mobile stations by polling at the base station, the base station has a central processing unit, and a member registering database combined with the central processing unit. The central processing unit has a function of retrieving the member registering database based on an allocation request from a customer and a function of transmitting the retrieval result to the mobile station. The mobile station has a display portion. The mobile station having received the allocation request from the base station is arranged so that the member registering database retrieval result of the central processing unit may be displayed on the display portion of the mobile station. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a wireless communication system, and more particularly, to a wireless communication system that realizes optimal dispatch with an AVM (Automatic Vehicle Monitoring) system for taxi dispatch.

  With the development of wireless communication technology, positioning technology using radio waves has greatly developed. Today, GPS (Global Positioning System) positioning systems using artificial satellites are used to position GPS receivers with an accuracy of around 10m around the world. Information can be obtained. This GPS positioning system is mainly used for car navigation, marine navigation, surveying, etc. In addition, with recent development of mobile communication systems, mobile data communication for a wide area can be easily performed. Such a GPS positioning system and a mobile communication system are fused, and a mobile location management system and a character transmission system are put into practical use. It is used for the purpose.

  FIG. 7 shows a block diagram of an AVM system for taxi dispatch using GPS. 7, reference numerals 701-1, 701-2,... 701-M denote base stations. Note that the base station is collectively referred to as a base station 701. Reference numeral 702 denotes a management center, which is connected to a plurality of base stations 701 through dedicated lines 703. Reference numerals 704-1, 704-2,... 704-N denote mobile stations (taxi). Note that the mobile station is collectively referred to as a mobile station 704. Reference numeral 705 denotes a communication area in which the base station 701-1 can communicate, that is, a so-called communication zone, which indicates that the mobile station 704 and the base station 701-1 located in the communication area 705 can communicate with each other. Reference numeral 706 denotes a GPS satellite, and each mobile station 704 can receive position information 707 from the GPS satellite 706 and obtain position information (longitude, latitude) of the own vehicle. In response to an instruction from the management center 702, each base station 701 transmits a polling signal PO1 to each mobile station 704, and each mobile station responds to this polling signal PO1 with polling response signals SR1, SR2,. Send SRn to the base station. That is, in this system, the management center 702 collects vehicle dynamics information in the order of the vehicle numbers of the mobile stations 704 in the communication area 705 by specifying the mobile station vehicle number from each base station 701. Note that the management center 702 can be configured integrally with the base station 701.

  Next, a specific example of the above-described polling method will be described with reference to FIG. FIG. 8 is a diagram for explaining a polling system for all mobile stations (taxi) in a conventional taxi dispatch AVM system. FIG. 8A shows a polling signal PO1 transmitted from the base station 701. FIG. In this case, for example, if the polling signal PO1 uses 5 frames (for example, 1 frame = 40 ms), the length of 1 polling signal is 200 ms. Assuming that the data collection speed in this case is 2,400 bps, if this polling signal is transmitted to 250 mobile stations, the polling period T will be about 60.4 seconds if the idle period (10.4 seconds) is also included. .

  Polling response signals from the mobile stations 704-1, 704-2,... 704-N (N = 250 in FIG. 8) with respect to the polling signal PO1 are shown in FIG. As described above, polling response signals SR1, SR2,... SR250 are transmitted from each mobile station to the base station 701 at a predetermined timing. Therefore, in this conventional polling system, the polling cycle T1 is repeated for 60.4 seconds, and it takes about 1 minute to recognize all vehicle positions. That is, the vehicle search is performed once per minute.

  FIG. 9A shows the contents of the polling signal PO1, and FIG. 9B shows the polling response signal SR. In FIG. 9A, the data length (polling signal length) is 200 ms, and the signal type 901 is information indicating a polling signal, for example. The polling vehicle number designation 902 is information for collecting the dynamic information of each mobile station by designating each mobile station 704-1, 704-2,. Reference numeral 903 denotes a spare bit. Also in FIG. 9B, the data length (polling response signal length) is also 200 ms, and the signal type 904 is information indicating that it is a polling response signal. The movement information 905 is vehicle movement information such as empty / actual vehicle information, vehicle speed information, and vehicle abnormality information of the mobile station. The position information 906 is the current location of the host vehicle that the mobile station obtains from GPS, and is, for example, latitude and longitude information.

  Thus, in a wireless communication system such as the conventional taxi dispatch AVM system described above, the mobile station itself detects and stores the current position of the mobile station using GPS. Then, based on the periodic polling signal from the base station, each mobile station transmits a dedicated transmission slot (polling response signal) assigned to each mobile station number of the dynamic position information of each mobile station with the base station. To return. In the base station, polling is sequentially performed for all the mobile stations, and the position dynamic information of all the mobile stations is grasped. In addition, at least one base station is connected to the management center, and the management center is closest to the mobile station that is most suitable for dispatch, for example, the customer based on the location dynamic information of the mobile station according to the dispatch request from the customer. Search for mobile stations and dispatch taxi vehicles. The mobile station designated for dispatch moves to the customer and places the customer on it.At this time, the customer tells the crew the designated place of the customer, for example, the customer's home, and the crew operates the mobile station. It is normal to go to the destination.

  In such a taxi dispatch AVM system, the customer informs the management center of his / her current position and requests a mobile station to dispatch. The management center searches for a mobile station by wireless operation, and performs an operation of dispatching the mobile station to the current position of the customer. The management center uses the GPS system and data transmission technology by polling to search for the optimal vehicle according to the customer's current location information, and improves the efficiency of vehicle allocation by transmitting vehicle allocation information in characters, etc. It was only a plan. In addition, even if the customer requested the delivery of the mobile station (taxi) to the management center, even if the information such as the destination is transmitted, the capacity of the dispatch information transmission data is small, that is, from the amount of dispatch data and the reception rate of the mobile station, In the conventional AVM system for taxi dispatch, it is impossible to transmit information such as a destination to a crew member of a mobile station in advance. In addition, although the mobile station side recognizes the dispatch information up to the current location of the customer, the destination after the ride has remained unknown until the customer puts the customer.

Not particularly found.

  In the conventional AVM system for taxi dispatch, the mobile station is mostly dispatched to the customer's current location. Even if the customer requests taxi dispatch from the management center, the taxi crew will be informed. It cannot be transmitted, and the destination of the customer after the customer gets on the vehicle remains unknown until the customer gets on.

  An object of the present invention is to provide a wireless communication system that realizes optimal vehicle allocation according to customer needs.

  Another object of the present invention is to provide a wireless communication system that informs a crew member of destination information based on a vehicle dispatch request from a customer by registering information such as a destination of the customer in advance.

  Still another object of the present invention is to provide a wireless communication system capable of displaying a customer destination route from a car navigation device and customer destination information.

  The present invention relates to a base station and a wireless communication system that collects information of each mobile station in the base station by polling. The base station is a central processing unit, and a member registration database coupled to the central processing unit The central processing unit has a function of searching the member registration database based on a vehicle allocation request from a customer and a function of transmitting the search result to the mobile station. The mobile station that has received a dispatch request from the base station is configured to display the member registration database search result of the central processing unit on the display unit of the mobile station.

  In the wireless communication system of the present invention, the central processing unit of the base station is configured to transmit dispatch data and customer destination data to the mobile station.

  In the wireless communication system of the present invention, the mobile station further includes a car navigation device having a map database, and the display unit of the mobile station is based on the customer destination data and the map database of the car navigation device. Configured to display the customer's destination route.

  In the wireless communication system of the present invention, the customer destination data is latitude, longitude data, and destination character data representing the location of the destination.

  As described above, according to the present invention, since information such as the destination of the customer is registered in advance, it is possible to inform the crew to the destination information based on the vehicle dispatch request from the customer, so it is optimal for the customer's needs. It is possible to realize a wireless communication system that realizes efficient vehicle allocation. Further, since the customer's destination route can be displayed on the mobile station from the car navigation device and the customer's destination information, the customer can be sent to the destination without bothering the customer and the crew. In particular, even if the destination is not communicated to the crew for some reason, it is possible to reliably deliver the customer to the destination with the information from the management center.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention. The configuration of a wireless communication system used in the present invention, for example, an AVM system for taxi dispatch is the same as that of the system shown in FIG. In FIG. 1, first, the transmitting radio of the base station 701 will be described with reference to FIG. Reference numeral 101 denotes a central processing unit, 102 denotes a storage unit, 103 denotes a polling signal generation unit, 104 denotes a data transmission request signal generation unit, 105 denotes a radio, and 106 denotes an antenna. The configuration of the mobile station 704 will be described with reference to FIG. In FIG. 2B, 107 is an antenna, 108 is a radio, 109 is a polling signal receiving unit, 110 is a data transmission request signal receiving unit, 111 is a slot setting unit, 112 is a storage unit, 113. Is a charge meter, 114 is a data generation unit, 115 is a car navigation device, 116 is an operation display unit, and 117 is a GPS antenna. The car navigation device 115 includes a position detection unit 118 that detects position information from the GPS antenna 117 and a map database 119.

  Next, this operation will be described. First, the transmission radio of the base station 701 executes an operation for obtaining various information from the mobile station 704, for example. Therefore, the storage unit 102 of the central processing unit 101 stores a mobile station number and generates a polling signal including information specifying the mobile station number to be transmitted in response to the first slot generated by the polling signal generation unit 103, and a data transmission request signal generation. The data transmission request signal to the mobile station generated by the unit 104 is transmitted from the wireless device 105 to each mobile station 104 via the antenna 106.

  The radio wave transmitted from the transmitting radio is received by the radio 108 via the antenna 107 on the mobile station 704 side. Among these, the polling signal is received by the polling signal receiving unit 109, and the vehicle number at the head of the slot is received. From the vehicle number of each mobile station.

  On the other hand, the data transmission request signal receiving unit 110 detects a data transmission request signal from the base station 701. Signals detected by the polling signal receiving unit 109 and the data transmission request receiving unit 110 are sent to the slot setting unit 111. The slot setting unit 111 sets the transmission slot timing of the data transmission slot of the local station. Further, the slot setting unit 111 continuously monitors the signal from the data transmission request signal receiving unit 110, and when the data transmission request signal is detected when the data transmission slot of the local station is reached, The generation unit 114 is activated to transmit data to be transmitted to the base station 701 via the radio 108 and the antenna 107.

  Note that the data generation unit 114 generates data by detecting, for example, an empty vehicle / actual vehicle based on a signal from the charge meter 113. The slot setting unit 111 is reset when the detection signal from the data transmission request signal receiving unit 110 is exhausted. The position detection unit 118 of the car navigation device 115 detects the position of the vehicle, for example, longitude and latitude, for example, using a GPS system. The map database 119 stores map data. For example, the map database 119 displays the current location of the host vehicle on the map from the position of the host vehicle detected by the position detector 118, that is, longitude and latitude information. In addition, the destination of the mobile station can be searched from the map database and displayed on the map as well. In addition, since the car navigation apparatus 115 is already well known, the detailed description about the structure and operation | movement is abbreviate | omitted. The operation display unit 116 has functions for performing operations of the mobile station, necessary data input, information display from the base station, car navigation display, and the like. The operation display unit 116 can also be configured integrally with the car navigation device 115. Reference numeral 117 denotes a GPS antenna.

  Next, the polling method used in the above-described embodiment of the present invention will be described with reference to FIGS. The polling system shown in FIG. 3 groups mobile stations in a wireless communication system such as an AVM system for taxi dispatch that consists of a large number of mobile stations, for example, several hundred mobile stations, and efficiently collects mobile station dynamic information. Shows when to do. That is, in order to collect dynamic information of all hundreds of mobile stations in one polling cycle in a short time, it takes too much time for polling, and it is difficult to transmit a polling response signal. Therefore, in FIG. 3, for example, a system is adopted in which the dynamic information of 150 mobile stations is collected by one polling signal PO1, and the dynamic information of the next 150 mobile stations is collected by the next polling signal PO2. doing.

  Therefore, when polling is performed on 150 mobile stations with a polling signal length of 40 ms, the polling period T2 is 12.4 seconds including the suspension period of 6.4 seconds. If there are 300 mobile stations, vehicle search can be performed once every 24.8 seconds. In FIG. 3A, only the polling signal PO1 is shown. Normally, however, the base station always keeps an empty line signal in order to synchronize information exchange between the base station and the mobile station. Is outgoing. In the present embodiment, the group is divided into 150 groups, but can be further subdivided into groups with a smaller number.

  FIG. 4A shows the contents of the polling signal PO1. As in FIG. 9A, the polling signal PO1 is composed of a signal type 401, a polling vehicle number designation 402 and a spare 403, and the data length (polling signal length) is composed of 40 ms.

  Next, polling response signals from the mobile stations 704-1, 704-2,... 704-N correspond to the polling signal PO1, as shown in FIG. Signals SR1, SR2,... SR150 (polling response signal length 40 ms) are transmitted to base station 701 at a predetermined timing. Note that the polling response signal is generically referred to as a polling response signal SR. Therefore, in this polling method of the present invention, for example, the polling cycle T2 for 150 mobile stations is repeated for 12.4 seconds, and for recognizing the positions of all 300 vehicles, it is 1 in 24.8 seconds. Vehicle searches can be performed once.

  FIG. 4B shows the contents of the polling response signal SR. The polling response signal SR includes a signal type 404, dynamic information 405, and position information 406, and a data length (polling response signal length) includes 40 ms. Note that the content of each data shown in FIG. 4 is equivalent to the content of the data shown in FIG.

  As described above, the operation with the polling signal length of 40 ms and the polling response signal length of 40 ms is described in our earlier application, Japanese Patent Application No. 2004-806 (filing date: January 6, 2004). ing. That is, a special polling response burst is adopted for the frame format of 1 frame 40 ms, and the receiver of the base station 701 simply receives the polling response burst and performs AGC (automatic gain control) and AFC (automatic control). (Frequency control) can be stably controlled. Therefore, the system can be stably operated with the polling signal length of 40 ms and the polling response signal length of 40 ms without deteriorating the reception error rate characteristic. Detailed description will be omitted.

  In order to facilitate understanding of the present invention, a conventional dispatch data transmission system will be described with reference to FIG. 10 before describing the present invention. In the conventional taxi dispatch AVM system, since the data collection speed is 2,400 bps as described above, one dispatch data is about 1,500 ms as shown in FIG. The reception rate is improved by sending this data twice. Therefore, the time taken for one dispatch data transmission is about 3.1 seconds. However, in this conventional AVM system for taxi dispatch, it is not possible to increase the dispatch data capacity beyond the amount of dispatch data and the reception rate at the mobile station, and it is not possible to send additional data such as customer destination information. It is not possible. FIG. 10B shows an example of dispatch data, where 1001 is a signal type, for example, an area for displaying dispatch data, and 1002 is dispatch character data, that is, a character for instructing a crew member to dispatch. An area for sending information (up to 127 characters), 1003 is a spare area.

  Therefore, in the present invention, a new function is added to a conventional wireless communication system, for example, an AVM system for taxi dispatch, that is, a customer's dispatch request is registered by previously registering information such as the customer's destination. Based on this, a wireless communication system for notifying crew members of destination information is realized. This will be described in detail below. FIG. 2 is a block diagram showing an embodiment of a base station used in the present invention. In FIG. 2, 201 is a map database, 202 is a member registration database, 203 is a display unit, and 204 is an operation unit. In addition, the same code | symbol is attached | subjected to the same thing as FIG. In FIG. 2, the member registration database 202 is, for example, in the taxi dispatch AVM system, the location of the passenger registered as a member, the location where the member frequently visits (store, company, etc.), the location of the golf course, etc. Are stored as a table. For example, Table 1 shows a database of customers registered as members as a table.

表１において、Ａ、Ｂ，・・・Ｎは、顧客名、（Ｘ１、Ｙ２）、・・（Ｘｎ、Ｙｎ）は、顧客の自宅位置の経度、緯度情報、行き先名は、自宅の住所である。また、（Ｍ２、Ｎ２）、・・（Ｍｎ、Ｎｎ）は、顧客の行きつけの場所位置等の経度、緯度情報、行き先名は、会社名、デパート名等で、それぞれ地図データベース上で地図表示できるように（緯度、経度）情報として記憶されている。また、顧客の行きつけの場所位置等は、タクシー会社等で、適宜、顧客サービスの目的からニーズに応じて変更、追加を行うことができる。なお、これらの顧客情報は、セキュリテイの観点から使用される無線通信システム内においてのみ使用が許されるように管理されていることは言うまでもない。

In Table 1, A, B,... N are customer names, (X1, Y2),... (Xn, Yn) are the longitude and latitude information of the customer's home location, and the destination name is the home address. is there. In addition, (M2, N2),... (Mn, Nn) are the longitude and latitude information of the customer's location, etc., and the destination name is the company name, department store name, etc., which can be displayed on the map database. (Latitude, longitude) is stored as information. In addition, the location of customers can be changed or added according to needs from the purpose of customer service at a taxi company or the like. Needless to say, such customer information is managed so as to be permitted only in the wireless communication system used from the viewpoint of security.

  Now, an AVM system for taxi dispatch according to the present invention will be described with reference to a conceptual diagram of a dispatch data transmission system shown in FIG. FIG. 5 (a) shows dispatch data from a base station. In the digital SCPC (Single Channel Per Carrier) system radio used in the present invention, the data transmission speed is 9,600 bps. Even if the destination information (latitude / longitude data of destination and destination name character data) shown in Table 1 is included in the dispatch data, one dispatch data may be about 950 ms (in the case of dispatch character data of 127 characters at the maximum). In addition, in order to improve the reception rate of data reception of the mobile station, it takes about 2.0 seconds to transmit the dispatch data once even if it is transmitted twice. FIG. 5B shows an example of the contents of the dispatch data signal according to the present invention. Reference numeral 501 denotes a signal type, for example, an area for indicating that the data is dispatch data. Reference numeral 502 denotes dispatch character data. An area for sending character information for instructing the crew to dispatch (up to 127 characters), 503 is a destination data area for sending latitude, longitude data, and destination name character data for the destination, and 504 is a spare area.

  Next, the operation of the present invention will be described with reference to FIG. First, it is assumed that there is a vehicle allocation request from the customer A to the customer's home P2 from the point P1 where the customer is currently located. When this vehicle allocation request is made, the base station 701 searches the mobile station 704 that is closest to the customer's current location and is an empty vehicle based on the operation sequence shown in FIG. As a result, it is assumed that the mobile station 704-3 is at a position closest to the current position of the customer A. In this case, the central processing unit 101 of the base station 701-1 collates with the member registration database 202 (table shown in Table 1) whether or not the customer A is a member. As a result, when the customer A is a member registered in the table shown in Table 1, the table shown in Table 1 is searched, and the customer's home location (longitude, latitude) P2 from the request for dispatch to the customer A's home. (X1, Y1) and the address of the destination name are read out.

In accordance with this result, the central processing unit 101 first transmits the dispatch data shown in FIG. 5 to the mobile station 704-3. The transmission timing is, for example, in the _DT period of the pause period (6.4 seconds) of the polling signal PO as shown in FIG. 3A, and in the area of the dispatch character data 502 as shown in FIG. 5B. The character information (maximum 127 characters) used to instruct the crew to dispatch the vehicle, the information of customer A's home (longitude X1, latitude Y1) and the destination name character data of customer A are sent using the destination data area 503. As a result, the mobile station 704-3 receives the transmission information D _R (shown in FIG. 3B) by the wireless device 108 and stores it in the storage unit 112.

Next, a method in which the mobile station 704-3 informs the crew of the above-described information will be described with reference to FIG. 1B and FIG. FIG. 6 is a diagram showing a display screen of the operation display unit 116 of the mobile station 704-3. FIG. 6A shows a state displayed on the operation display unit 116 based on information on the point P1 where the customer A is currently located and the position (longitude X1, latitude Y1) P2 of the customer A's home. On the other hand, the mobile station 704-3 is equipped with a car navigation device 115, and transmits to the customer A the transmission information D _R sent from the map database 119 of the car navigation device and the central processing unit 101 of the base station 701-1. The car navigation device is driven based on the information on the vehicle allocation data (the location P1 where the customer A is currently located) and the location of the customer A's home (longitude X1, latitude Y1) P2, and as shown in FIG. The destination route R is displayed on the display unit 116 of the station 704-3. At the same time, the destination name can also be displayed (not shown). Therefore, when the crew member first receives a vehicle allocation request from the central processing unit 101 of the base station 701-1, the destination of the customer is stored in the storage device 112, and the customer A gets on the mobile station 704-3. When the customer A asks for the destination again, there is no need to operate the car navigation device 115, and when the customer A gets on the map, the name of the destination is displayed and the passenger can depart to the destination desired by the taxi. As an AVM system, it becomes a system with extremely high service for the customer, and it becomes an easy-to-operate system for the crew. In the above-described embodiment, the home position of the customer A has been described. However, in addition to this case, for example, the customer B registered in the member registration database 202 seems to use it for going to a place to go to, for example, a company. Even in this case, as in the case described above, the position of the company is registered as longitude and latitude as (M2, N2) as shown in Table 1, and the company name is also registered. At that time, the customer B can depart for the destination.

In the above embodiment, since doing the polling signal PO and a polling response signal SR by a 1 channel and receives a destination received information D _R in the rest period to receive the destination information D _T and the mobile station sending the base station and that although, in the case of schemes that use two channels, in particular, there is no need to use the rest period, as appropriate, can of course be transmitted and received destination information D _T and destination received information D _R.

  Although the present invention has been described in detail above, the present invention is not limited to the embodiments of the radio communication system described herein, and can be widely applied to radio communication systems other than those described above. Needless to say.

It is a block diagram which shows schematic structure of one Example of the base station and mobile station which are used for this invention. It is a block diagram which shows schematic structure of one Example of the base station of this invention. It is a figure for demonstrating the sequence of the polling system of one Example of this invention. It is a figure for demonstrating the polling signal and polling response signal of one Example of this invention. It is a figure which shows the dispatch data of one Example of this invention. It is a figure which shows the screen display of one Example of this invention. It is a figure which shows schematic structure of the radio | wireless communications system used for this invention. It is a figure for demonstrating an example of the sequence of the polling system of the conventional radio | wireless communications system. It is a figure for demonstrating an example of the conventional polling signal and a polling response signal. It is a figure which shows an example of the conventional dispatch data.

Explanation of symbols

  101: central processing unit, 102, 112: storage unit, 103: polling signal generation unit, 104: data transmission request signal generation unit, 105, 108: radio, 106, 107: antenna, 109: polling signal reception unit, 110 : Data transmission request receiving unit, 111: slot setting unit, 113: charge meter, 114: data generation unit, 115: car navigation device, 116: operation display unit, 117: GPS antenna, 118: position detection unit, 119, 201: Map database, 202: Member registration database, 203: Display section, 204: Operation section, 401, 404, 501: Signal type area, 402: Polling car number designation area, 403, 504: Reserve area, 405: Dynamic information area, 406: position information area, 502: dispatch character data area, 503: destination data area, 70 : Base station, 702: management center, 703: transmission line, 704: mobile station 705: a communication area, PO1: polling signal, SR: poll response signal.

Claims (3)

  In a wireless communication system in which information of a plurality of mobile stations is collected by polling a base station and the base station, the base station has a central processing unit, a member registration database coupled to the central processing unit, The central processing unit has a function of searching the member registration database based on a vehicle allocation request from a customer and a function of transmitting the search result to the mobile station, and each mobile station has a display unit, The wireless communication system, wherein the mobile station that has received a dispatch request from the base station displays the member registration database search result of the central processing unit on a display unit of the mobile station.   2. The wireless communication system according to claim 1, wherein the central processing unit of the base station transmits dispatch data and customer destination data to the mobile station.   3. The wireless communication system according to claim 2, wherein the mobile station further includes a car navigation device having a map database, and the display unit of the mobile station is based on the customer destination data and the map database of the car navigation device. A wireless communication system characterized by displaying a customer's destination route.

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