JP2011019104A - Wireless base station, broadcasting system with the same, and method of controlling wireless base station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless base station or the like for performing activities for data collection from a communication terminal receiving broadcast, while continuing the broadcast within a specific area.SOLUTION: The wireless base station 300 executes broadcasting processing (S6, S6a, ...) of transmitting broadcast data to a plurality of communication terminals by broadcasting at a transmission speed higher than a reproduction speed of the broadcast data in a communication terminal 400. Furthermore, the wireless base station executes terminal data acquisition processing of defining times which follow broadcasting times B, Ba, ..., being transmission times of broadcast data and are within difference times between the broadcasting times and reproduction times of the broadcast data, as terminal data acquisition times A, Aa, ..., for acquiring prescribed data from communication terminals and waiting for reception of prescribed data from the plurality of communication terminals for these terminal data acquisition times and storing prescribed data on reception (S12, S12a, ...).

Description

  The present invention relates to a control technology for a radio base station that performs radio communication with one or more communication terminals.

  Recently, in some trains, a monitor is arranged on the upper part of a door or the like, and operation information and advertisements are often displayed on the monitor. In the environment of a train, it is very attractive from the advertisement data provider side because there are many passengers who are sitting or standing in a limited area. However, on the monitor at the top of the door, the number of people who can watch is limited, and since there is no sound, it feels unsatisfactory. For this reason, it is preferable that advertisements can be provided to both passengers from both the sound and the screen.

  Therefore, it is conceivable to distribute advertisements to personally owned mobile phones as one method for realizing this.

  Most of the recent mobile phones have a reception function for one-segment broadcasting (one-segment broadcasting of digital terrestrial broadcasting) and can receive television broadcasting. In the advertising business, rating of the audience rating is very important in determining the value of the advertisement. It is desirable to be able to measure the audience rating, and a mobile phone has an advantage that the communication function can be used. As a method corresponding to these, although it is not limited to the setting in the train, a method for collecting viewing information of a television broadcast by a mobile phone equipped with a one-seg reception function of the mobile phone is described in Patent Document 1 below. .

  In this method, viewing information for specifying a television broadcast program is transmitted to a totaling server via a mobile band communication network and the Internet using a mobile phone that has received the television broadcast.

  As a method for collecting data such as broadcast viewing information, in addition to the above method, for example, a method using a wireless LAN described in Patent Document 2 is also conceivable. In addition, in this patent document 2, after establishing connection once between many communication terminals and a base station, and attaching an identifier to each communication terminal that has established connection, all identifiers are divided into a plurality of groups, A technique for reducing the probability of a communication collision when data is collected from each communication terminal by requesting data transmission for each group is described.

JP 2006-60547 A JP 2007-288312 A

  However, in the method described in Patent Literature 1, when a train-specific broadcast program, advertisement, or the like is to be provided by one-segment broadcasting, since it is less public, there is a range in which broadcast can be received due to output restrictions of the Radio Law. The radius is only about 2 m with the antenna at the center. Furthermore, the cellular phone service does not cover the subway area and the like, and there are areas that cannot be used for collecting broadcast viewing information. For this reason, the method of patent document 1 is not a realistic method regarding the broadcast in a train and collection of the viewing information.

  In addition, when data such as broadcast viewing information is collected by the wireless LAN described in Patent Document 2, if broadcasting is attempted using the wireless LAN, the collection of data such as viewing information is efficiently performed. Therefore, there is a problem that it is difficult to maintain the continuity of broadcasting while performing activities for collecting data.

  The present invention pays attention to such problems of the prior art, and provides a technique capable of maintaining continuity of broadcasting while performing activities for data collection in a limited environment such as in a train. For the purpose.

A radio base station according to the invention for solving the above problems is
Broadcasting the broadcast data together with the reproduction control information related to the reproduction speed at a transmission speed higher than the reproduction speed of the broadcast data at the communication terminal via the predetermined communication channel to the one or more communication terminals;
The time following the broadcast time, which is the transmission time of the broadcast data, and the time during the difference time between the broadcast time and the reproduction time of the broadcast data determined by the reproduction speed information is determined from the communication terminal as the predetermined data. Terminal data acquisition time for obtaining the data, and during the terminal data acquisition time, waiting for reception of the predetermined data from the one or more communication terminals, the second communication means using the predetermined communication channel When the predetermined data is received from the communication terminal, the predetermined data is stored in the data storage means.

In addition, a radio base station according to another invention is
According to a unique identifier assigned in advance for each communication terminal, the identifier for each communication terminal is divided into a plurality of groups,
When a communication address notification permission for a communication terminal having an identifier belonging to one group of the plurality of groups is transmitted by broadcast and a message for the communication address notification station from a communication terminal belonging to the one group is received, A communication address acquisition process for storing the communication address included in the message is stored in the communication address storage means, and when the communication address acquisition process for the communication terminals belonging to the one group is completed, the communication address acquisition process is performed for all the groups. Until the end of the communication address acquisition process of the communication terminals belonging to another group,
Communication is sequentially performed with each communication terminal indicated by one or more communication addresses stored in the communication address storage unit at a time when a predetermined condition is satisfied.

  According to the present invention, continuity of broadcasting can be maintained while performing activities for data collection in a limited environment such as in a train.

  In addition, according to another invention, since the communication activity for data collection is performed for each of a plurality of groups related to the communication terminal and the number of communication objects is reduced, the probability of communication collision in this communication activity can be reduced, This communication activity can be performed efficiently.

It is a systematic diagram of the in-vehicle broadcast system in one embodiment concerning the present invention. It is a lineblock diagram of a train broadcast data server and a vehicle broadcast data server in one embodiment concerning the present invention. It is a block diagram of the wireless base station and communication terminal in one Embodiment which concerns on this invention. It is explanatory drawing which shows the data structure of the station information in one Embodiment which concerns on this invention, station list information, and the next stop station information. It is explanatory drawing which shows the data structure of the browsing history table in one Embodiment which concerns on this invention. It is explanatory drawing which shows the data structure of the polling list in one Embodiment which concerns on this invention. It is a sequence diagram which shows operation | movement of the in-vehicle broadcast system in one Embodiment which concerns on this invention. It is explanatory drawing which shows the various display screens of the communication terminal in one Embodiment which concerns on this invention. It is explanatory drawing which shows the data structure of the various communication frames in one Embodiment which concerns on this invention.

  Hereinafter, an embodiment of a broadcasting system according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the broadcast system according to the present embodiment is an in-car broadcast system that performs in-car broadcast for each vehicle of the train 1.

  The in-car broadcast system includes a station server 500 installed in a fixed station such as a station, a train broadcast data server 100 installed in a part of the conductor room 2 of the vehicle 1a and receiving broadcast data from the station server 500, A vehicle broadcast data server 200 that is installed for each vehicle 1b, 1c and receives broadcast data from the train broadcast data server 100, and a base station that wirelessly outputs the broadcast data from the vehicle broadcast data server 200 within each vehicle 1b, 1c. 300. In addition to the train broadcast data server 100, an operation monitoring device 600 that monitors the operation status of the train 1 and outputs operation information is installed in the conductor room 2.

  The train broadcast data server 100 and the vehicle broadcast data server 200 installed in each vehicle 1b, 1c are connected to each other via a communication line 5 so as to be capable of wired communication. Further, the vehicle broadcast data server 200 and the base station 300 are connected to each other via a communication line 6 so as to be capable of wired communication.

  Broadcast data or the like wirelessly output from the base station 300 in each vehicle 1b, 1c is received by a communication terminal 400 such as a mobile phone owned by the passenger G in each vehicle 1b, 1c. Note that the wireless communication between the base station 300 and the communication terminal 400 is executed according to, for example, a wireless LAN system defined by IEEE 802.11.

  The station server 500 holds broadcast data broadcast in the vehicles 1b and 1c of the train 1 in addition to station information to be described later, and is installed in the conductor compartment 2 of the train 1 wirelessly. To the train broadcast data server 100.

  As shown in FIG. 2, the train broadcast data server 100 is a vehicle server that performs wired communication with a station-side communication interface 110 that wirelessly communicates with a station server 500 and a vehicle broadcast data server 200 that is installed for each of the vehicles 1b and 1c. Side communication interface 115, monitoring apparatus side communication interface 116 that performs wired communication with the operation monitoring apparatus 600, CPU 120 that executes various arithmetic processes, RAM 130 that becomes a work area of the CPU 120, and various data are stored in advance. ROM 135, auxiliary storage device 140 such as a hard disk drive device, disk storage / reproduction device 150 that performs storage processing and reproduction processing on a disk storage medium such as a CD (Compact Disc), microphone 160, and microphone 160 Converting an analog sound signal from a digital sound signal , And a voice modulator 161 for compressing it, and.

  In the auxiliary storage device 140, a station information file 141 storing station information for each of a large number of stations, a video broadcast content file 142 storing content data (broadcast data) for video broadcast, and browsing of the video broadcast content A browsing history table 143 in which a history is stored is provided. Further, the auxiliary storage device 140 stores various programs 144 in advance. The data stored in the station information file 141 and the video broadcast content file 142 are all provided from the station server 500. The data stored in the browsing history table 143 is provided from the communication terminal 400 via the base station 300 and the vehicle broadcast data server 200. Various programs 144 are reproduced by the disk storage / reproduction device 150 from the disk storage medium D in which these programs are stored, and stored in the auxiliary storage device 16. The various programs 144 may be provided from the station server 500, and the station information may be provided from the disk storage medium D.

  The CPU 120 functions as the communication control unit 121 and the storage control unit 122 by executing various programs 144 stored in the auxiliary storage device 140.

  The communication control unit 121 controls the station-side communication interface 110, the vehicle server-side communication interface 115, and the monitoring device-side communication interface 116, creates data transmitted by these communication interfaces 110, 115, and 116, and converts it into a communication frame. At the same time, the communication frames received by these communication interfaces 110, 115, and 116 are disassembled and analyzed. Specifically, the communication control unit 121 determines, from station information stored in the station information file 141, station list information (to be described later) and the next stop, according to the train position indicated by the operation information sent from the operation monitoring device 600. Create station information. Further, announcement audio data sent from the microphone 160 via the audio modulator 161, broadcast content data stored in the video broadcast content file 142, station list information, next stop station information, etc. are stored in a communication frame, According to the position, the vehicle server side communication interface 115 sends out. In addition, the communication control unit 121 stores the data stored in the browsing history table 142 in a communication frame, and transmits this from the station side communication interface 110.

  The storage control unit 122 stores data in the auxiliary storage device 140 and reads data from the auxiliary storage device 140. Specifically, the storage control unit 122 receives station information, video broadcast content data, and the like sent from the station server 500, a browsing history sent from the vehicle broadcast data server 200, and the like from the communication control unit 121, This is stored in the corresponding files 141, 142, 143 of the auxiliary storage device 140. Further, station information, video broadcast content data, and the like stored in the auxiliary storage device 140 are read out and passed to the communication control unit 121.

  The vehicle broadcast data server 200 includes a base station side communication interface 210 that performs wired communication with the base station 300, a train server side communication interface 215 that performs wired communication with the train broadcast data server 100, a CPU 220 that executes various arithmetic processes, and the CPU 220. RAM 230 serving as a work area, ROM 235 storing various data in advance, auxiliary storage device 240 such as a hard disk drive, and disk storage for performing storage processing and reproduction processing on a disk storage medium such as a CD / Reproducing apparatus 250.

  The auxiliary storage device 240 is provided with a browsing history table 243 in which browsing history of video broadcast content is stored. Further, various programs 244 are stored in advance in the auxiliary storage device 240. Data stored in the browsing history table 243 is provided from the communication terminal 400 via the base station 300. Various programs 244 are reproduced from the disk storage medium D in which these programs are stored by the disk storage / reproduction device 250 and stored in the auxiliary storage device 16.

  The CPU 220 functions as the communication control unit 221 and the storage control unit 222 by executing various programs 244 stored in the auxiliary storage device 240.

  The communication control unit 221 controls the base station side communication interface 210 and the train server side communication interface 215, creates data transmitted by these communication interfaces 210, 215, and converts them into communication frames. The communication frame received by 215 is disassembled and analyzed. Specifically, the communication control unit 221 disassembles and analyzes various requests and various data communication frames sent from the train broadcast data server 100, and converts them into communication frames again as necessary, so that the base station From the side communication interface 210. In addition, the communication control unit 221 disassembles and analyzes the communication interface of the browsing history sent from the base station 300, passes it to the storage control unit 222, and stores it in the browsing history table 243 of the auxiliary storage device 240. Let Further, in response to the browsing history request from the train broadcast data server 100, the communication control unit 221 converts the data in the browsing history table 243 into a communication frame and sends it from the train server side interface 215.

  The storage control unit 222 stores data in the auxiliary storage device 240 and reads data from the auxiliary storage device 240. Specifically, the storage control unit 222 receives the browsing history or the like sent from the base station 300 from the communication control unit 221 and stores it in the corresponding file 243 or the like of the auxiliary storage device 240. In addition, data is read from the browsing history table 243 of the auxiliary storage device 240 and passed to the communication control unit 221.

  As illustrated in FIG. 3, the base station 300 includes a vehicle server side communication interface 310 that performs wired communication with the vehicle broadcast data server 200, a terminal side communication interface 315 that performs wireless communication with the communication terminal 400, and a CPU 320 that executes various arithmetic processes. A RAM 330 serving as a work area of the CPU 320, a ROM 335 that stores various data in advance, and a flash ROM 340 that stores various programs 344 and the like.

  The flash ROM 340 is provided with a polling list 341 in which communication addresses of a plurality of communication terminals 400 are stored, and a browsing history table 343 in which browsing history of video broadcast content is stored. Further, as described above, various programs 344 are stored in the flash ROM 340 in advance. Data stored in the browsing history table 343 and the polling list 341 is basically provided from the communication terminal 400.

  The CPU 320 functions as the communication control unit 321 and the storage control unit 322 by executing various programs 344 stored in the flash ROM 340.

  The communication control unit 321 controls the vehicle server-side communication interface 310 and the terminal-side communication interface 315 to create data to be transmitted by these communication interfaces 310 and 315, convert them into communication frames, and also use these communication interfaces 310 and 315. Disassemble and analyze the received communication frame. Specifically, the communication control unit 321 disassembles and analyzes the communication frames of various requests and various data sent from the vehicle broadcast data server 200, and converts them into communication frames again as necessary. The data is transmitted from the interface 315. Further, the communication control unit 321 disassembles and analyzes the communication interface including the browsing history and the communication address transmitted from the communication terminal 400, and passes this to the storage control unit 322, and the correspondence table 341 of the flash ROM 340 and the like. , 343. Further, in response to the browsing history request from the vehicle broadcast data server 100, the communication control unit 321 converts the data in the browsing history table 343 into a communication frame and sends it from the vehicle server side interface 310.

  The storage control unit 322 stores data in the flash ROM 340 and reads data from the flash ROM 340. Specifically, the storage control unit 322 receives a browsing history, a communication address, and the like sent from the communication terminal 400 from the communication control unit 221, and stores them in the correspondence tables 341, 343 and the like of the flash ROM 340. Further, the storage control unit 322 reads data from the browsing history table 343 of the flash ROM 340 and passes it to the communication control unit 321.

  A communication terminal 400 such as a mobile phone owned by a passenger G who is a user of the in-car broadcast system has a first communication interface 410 that wirelessly communicates with other communication devices via a mobile phone network, and a wireless communication device 400 that communicates with the base station 300 wirelessly. A two-communication interface 415, a CPU 420 that executes various arithmetic processes, a RAM 430 that becomes a work area of the CPU 420, a ROM 435 that stores various data in advance, a flash ROM 440 that stores various programs 444, and the like , An input key 451, a display 452, a microphone 453, a speaker 454, and an interface 450 such as an input key 451. In addition, a headphone 455 is connected to the communication terminal 400.

  The flash ROM 440 stores a MAC address 441 serving as a communication address for wireless communication using the second communication interface 415, various programs 444, and a communication address for the wireless communication using the first communication interface. ing. The flash ROM 440 is provided with a browsing history table 443 for video broadcast contents. Further, information 442 of the station where the owner of the communication terminal 400 gets off is stored in the flash ROM 440 in the course of wireless communication with the base station 300 of the in-car broadcast system. Further, information (station list information) 431 of all the stop stations of the vehicle is stored in the RAM 430 in the course of wireless communication with the base station 300 of the in-car broadcast system.

  The CPU 420 executes various programs 444 stored in the flash ROM 440, thereby controlling the first communication control unit 421 that controls communication by the first communication interface 410 and the second communication that controls communication by the second communication interface 415. A control unit 422, a storage control unit 423 that controls storage and reading of data with respect to the RAM 430 and the flash ROM 440, a display control unit 424 that controls display of the display 452, and an audio control unit 425 that controls the speaker 454 and the microphone 453. , An input control unit 426 that controls the input key 451, and a station comparison unit 427 that determines whether or not the station is an exit station of the owner of the communication terminal 400.

  In the in-car broadcast system described above, the train broadcast data server 100 communicates directly with the station server 500. However, a dedicated communication device that communicates with the station server 500 is provided, and this dedicated communication device is used. The train broadcast data server 100 and the station server 500 may communicate with each other.

  The in-vehicle broadcast system described above has a vehicle broadcast data server 200 for each vehicle 1b, 1c in addition to the train broadcast data server 100. In order to reduce the load on the train broadcast data server 100 due to the need to communicate with a large number of communication terminals 400, the train broadcast data server 100 can be provided with high processing capability. The vehicle broadcast data server 200 may be omitted.

  In the above, the base station 300 is provided with a function for storing the polling list 341 in addition to the function as a base station. However, these functions may be realized by separate devices.

  Next, the operation of the in-car broadcast system of this embodiment will be described with reference to the sequence diagram shown in FIG.

  Here, it is assumed that the station information file 141 of the train broadcast data server 100 has already stored station information for each station including at least all the stations where the train 1 stops. As shown in FIG. 4, the station information 10 includes a station order number 11 indicating the stop order from the first station of the station, an ID 12 of a railway company that operates the train, and a route on which the train travels. It has route ID13, the up / down code | symbol 14 which shows whether the said train is an uplink operation or a downlink operation, station ID15 of the said station, and the station name 16 shown by the character data.

  As the railway company ID, for example, “01” is assigned to the railway company “A railway company”, and “02” is assigned to the railway company “B railway company”. As the route ID, for example, “001” is assigned to the route “Tokaido Line”, and “002” is assigned to the route “Yamanote Line”. As uplink / downlink codes, “0” is assigned to the uplink and “1” is assigned to the downlink. Station IDs are “001” at Tokyo Station, “002” at Shimbashi Station, “003” at Shinagawa Station, and “012” at Oiso Station.

  Therefore, for example, when the station information is “12-01-001-012-Otsuchi”, the railway company operating the train at the “12” station from the first station is “A railway company”. This indicates that the route on which the train travels is the “Tokaido Line” and the station is “Oiso”.

  In addition, in the video broadcast content file 142 of the train broadcast data server 100, video broadcast content data to be broadcast before the train 1 arrives at the terminal station, and which broadcast content is to be broadcast in each operation section in what order. Is already stored. The video broadcast content data is stored in the video broadcast content file 142 in association with the ID of the content for each of a plurality of contents. The broadcast program program is stored in the video broadcast content file 142 in association with the ID of the video broadcast content data to be broadcast for each of a plurality of operation sections.

  The communication control unit 121 of the train broadcast data server 100 has the operation information sent from the operation monitoring device 600 stopped at the stop station, or within a predetermined time or distance from the departure from the stop station. In this case, the station list information is created, stored in the body of the communication frame, and transmitted from the vehicle server side communication interface 115 to the vehicle broadcast data server 200 installed for each vehicle 1b, 1c multiple times. Send (S1).

  The station list information is a bundle of station information for each stop station from the next stop station to the end station among many pieces of station information stored in the station information file 141. For this reason, when the Tokaido Line, Tokyo departure, and Odawara end train leaves Shimbashi Station, as shown in FIG. 4, the station list information 10a is the end station “Odawara” from “Shinagawa” station. "It becomes a bunch of station information for each stop to the station. The station list information is a bundle of station information for each stop station from the next stop station to the end station, but is a bundle of station information for each stop station from the start station to the stop station. Also good. In this way, by configuring the station list information, it is possible to confirm the information of the station that has been overtaken even when the passenger has overtaken.

  When receiving the station list information from the train broadcast data server 100, the vehicle broadcast data server 200 sends it to the base station 300 (S2). The base station 300 stores this station list information in the body of the wireless communication frame, stores “F” indicating broadcast in the destination column of the header, and transmits this (S3). The station list information from the train broadcast data server 100 is added with an instruction to broadcast the station list information, and the base station 300 broadcasts the station list information according to the instruction. .

  When the second communication interface 415 of the communication terminal 400 owned by the passenger G in the vehicles 1b and 1c receives the station list information, the second communication control unit 422 stores the station list information in the storage control unit 422. The data is passed and stored in the RAM 430, and a reception lamp or the like is blinked in order to notify the passenger G who is the owner of the communication terminal 400 of the reception of data or the like. When the passenger G notices the reception of the data or the like and performs an operation for prompting the display of the reception data or the like, the display control unit 424 displays the station list information on the display 452 based on the station list information 431 stored in the RAM 430. Display (S4). At this time, for example, when the communication terminal 400 receives the station list information 10a shown in FIG. 4 on the display 452, as shown in FIG. 8, the terminal “Odawara” is reached from “Shinagawa” station as the next stop station. A disembarking station input screen 452a is displayed in which the names of the stopping stations up to the station are shown in order.

  When the passenger G operates the input key 451 and designates one of the station names from the next stop station to the end station displayed on the display 452 as the exit station, the input control unit 426 receives this and stores it. It passes to the control unit 423. The storage control unit 423 stores the station information of the getting-off station in the flash ROM 440 as the getting-off station information 442, that is, registers the getting-off station information 422 (S5). In addition, although the registration process (S5) of the above getting-off station is drawn in FIG. 7 when the communication terminal 400 receives station list information, the passenger G is drawing immediately, this passenger G is the said train. If you are in the middle of riding, you can receive the service for getting off the station at a later time.

  When the communication control unit 121 of the train broadcast data server 100 sends the station list information from the vehicle server side communication interface 115 to the vehicle broadcast data server 200 a plurality of times (S1), it is stored in the video broadcast content file 142 of the auxiliary storage device 140. From the storage control unit 122, the broadcast control program 122 obtains the video broadcast content data of the content ID indicated by the broadcast program program from the plurality of video broadcast content data stored in the video broadcast content file 142. Then, this is stored in a communication frame and sent from the vehicle server side communication interface 115 to the vehicle broadcast data server 200 installed for each of the vehicles 1b and 1c (S6).

  Here, data stored in the communication frame will be described with reference to FIG.

  The communication frame 20 has a MAC header 21 and a MAC body. The MAC header 21 stores a destination address 22 and a transmission source address. The destination address 22 stores “F” indicating that the communication frame 20 is broadcast. An IP packet is stored in the MAC body, and a destination address 24 and the like are stored in the header 23 of the IP packet. The destination address 24 stores a broadcast address. A plurality of video data 25 for each video frame is stored in the payload of the IP packet. The video data 25 of one video frame includes a content ID 26, a PSC (Picture Start Code) that is a code indicating video start, a TR (Temporal Reference) 27 that is a video frame number, and PTYPE (Picture Type Information) that indicates a video type. ), A TM (Time Stamp) 28 indicating the time from the playback time of the first video frame to the playback time of the video frame, and a video data body 29. In the above, one video broadcast content data is a bundle of data of a plurality of video frames 25.

  The communication control unit 121 of the train broadcast data server 100 sends the video data at a transmission speed higher than the reproduction speed of the video data body 26, for example, at a transmission speed about twice the reproduction speed. In order to increase the transmission rate, a transmission time shortening process for storing data 25 for a plurality of video frames in the payload of one communication frame is performed, and this communication frame is sent from the vehicle server side communication interface 115 to the vehicle broadcast data server 200. The communication control unit 121 continuously executes this process for a predetermined broadcast time B (S6).

  When receiving the video data communication frame, the vehicle broadcast data server 200 throughputs the frame and sends it to the base station 300 (S7). Then, the base station 300 wirelessly transmits a MAC frame containing a plurality of video data 25 in the IP packet of the video data communication frame (S8). This MAC frame has a MAC header and a MAC body. The MAC frame stores a destination address, a transmission source address, and the like. As the destination address, “F” indicating broadcast is stored in accordance with the destination address (broadcast address) 24 (FIG. 9) of the IP header 23 in the communication frame from the vehicle broadcast data server 200. The MAC body stores a plurality of video data 25 as they are in the IP packet of the received communication frame.

  Note that the transmission rate of the communication frame from the vehicle broadcast data server 200 to the base station 300 and the transmission rate of the communication frame from the base station 300 to the communication terminal 400 are the communication from the train broadcast data server 100 to the vehicle broadcast data server 200. It is substantially the same as the frame transmission rate.

  When the second communication interface 415 of the communication terminal 400 receives the communication frame of the video data, the second communication control unit 422 passes the video data in the communication frame to the storage control unit 423 and stores it in the RAM 430. At the same time, in order to notify the passenger G who is the owner of the communication terminal 400 of the reception of data or the like, a reception lamp or the like is blinked. When the passenger G notices the reception of the data, etc. and performs an operation for prompting the display of the received data, the display control unit 424 receives the video data stored in the RAM 430 from the storage control unit 423 and displays it. It is displayed on 452 (S9). At this time, the display control unit 424 causes the display 452 to display the video data body in the video data according to the time stamp (reproduction control information) included in the video data.

  In this way, the video data body is played back according to the time stamp, so the video data body is played back at an appropriate playback speed regardless of the transmission speed of the video data. Therefore, when the transmission speed of one video broadcast content data is about twice the reproduction speed and the broadcast time B which is the transmission time of this data is 5 seconds, the reproduction time of this data is about 10 seconds. .

  When the storage control unit 422 passes all the video data of one video broadcast content data to the display control unit 424, the storage control unit 422 stores the content ID included in the video data in the browsing history table 443 of the flash ROM 440. (S10).

  When the second communication control unit 422 is receiving a video data communication frame, the storage control unit 423 displays the video data in the communication frame if the display 452 is not ready to display the video data. While being sequentially stored in the RAM 430, when the amount of video data in the RAM 430 exceeds a predetermined amount, the video data exceeding the predetermined amount is deleted in chronological order. Here, the storage control unit 423 stores the content ID in the browsing history table 443 on condition that all video data of one video broadcast content data is passed to the display control unit 424. Even when a part of video data in one video broadcast content data is transferred to the display control unit 424, the content ID may be stored in the browsing history table 443. In addition, here, the content ID is used to identify the browsed content, but instead of this, the reproduction time zone of the video data may be used.

  The communication control unit 121 of the train broadcast data server 100 secures the second and subsequent broadcast times Ba, Bb,... After sending the video data at the first broadcast time B, and at these broadcast times Ba, Bb,. The video data in the video broadcast content data stored in the video broadcast content file 142 is sequentially stored in a communication frame and sent to the vehicle broadcast data server 200 (S6a, 6b,...). The start timing of these broadcast times Ba, Bb,... Is a timing at which video display time on the communication terminal 400 side continues. Specifically, as described above, the start timing of the broadcast times Ba, Bb,... Is about twice as fast as the playback speed of one video broadcast content data. If the data reproduction time is about 10 seconds, it is about 5 seconds after the end of the previous broadcast time.

  The video data transmitted from the train broadcast data server 100 is sent to the communication terminal 400 via the vehicle broadcast data server 200 and the base station 300 (S7a, S7b,..., S8a, S8b,. ). If the display 452 of the communication terminal 400 is not ready to display video data, the video data is displayed (S9a, S9b,...) And the history is registered in the flash ROM 440 (S10a, S10b,. …,).

  Thereafter, the broadcast and reproduction of the video broadcast content data is continued until a predetermined time before the train 1 arrives at the station.

  By the way, since the train broadcast data server 100 transmits video data at regular time intervals, the base station 300 also receives video data at regular time intervals and wirelessly transmits it. For this reason, the base station 300 becomes an idle time for communication processing during this fixed time interval, that is, between the broadcast time of the train broadcast data server 100 and the next broadcast time.

  Therefore, in this embodiment, the time during the idle time is set as the terminal data acquisition time A, and the base station 300 uses the terminal data acquisition time A to set the communication address of the communication terminal 400 in the service area of the base station 300, Here, a terminal data acquisition process for acquiring a MAC address is executed.

  In this terminal data acquisition process, the communication control unit 320 of the base station 300 refers to the polling list 341 provided in the flash ROM 340 and prompts communication (association request) from the communication terminal 300 having a specific MAC address.

  Here, the polling list 341 will be described with reference to FIG.

  The polling list 341 includes a group name area 341a that stores group names when a plurality of communication terminals 400 are grouped, and an end number that stores the end number of the MAC address of the communication terminal 400 belonging to the group. It has an area 341b and a MAC address area 341c in which the last number of MAC addresses are stored.

  In the group name area 341a, four group names A to D are stored in advance. That is, here, the plurality of communication terminals 400 are divided into four groups. In the end number area 341b of group A, 0, 4, 8, and C among the end numbers of the MAC address are stored in advance. That is, among 0 to 9, A, B, C, D, E, and F that are the end numbers of the MAC address, 0 and the end numbers every four from 0 are stored. Hereinafter, similarly, 1, 5, 9, and D are stored in advance in the end number area 341b of the group B, and 2, 6, A, and E are stored in advance in the end number area 341b of the group C. 3, 7, B, and E are stored in advance in the D end number area 341b.

  Here, in order to group a large number of communication terminals 400, the MAC address of each communication terminal 400 is used. However, in addition to the MAC address, the number allocation element of the individual device is strong and the randomness of the number is high. As long as it is an identification number, for example, the manufacturing number or device number of the communication terminal may be used. On the other hand, if the lots are the same, such as the lot numbers, the identification numbers that are the same are less random, so it is not preferable to use them for grouping.

  The communication control unit 320 of the base station 300 refers to the polling list 341 and first selects the communication terminals 400 belonging to the group A, that is, the communication terminals 400 whose MAC address end numbers are 0, 4, 8, and C. A beacon (communication address notification permission) to be an association target is broadcast and transmitted from the terminal-side communication interface 315.

  The beacon communication frame 30 includes a MAC header 31 and a MAC body 35 as shown in FIG. The MAC header 31 stores a destination address 32, a source address 33, and the like. The destination address 32 here is “F” indicating broadcast. The MAC body 35 includes a beacon general information element 36 including an SSID (Service Set ID) that is an identifier of the base station 300, and the MAC address of the communication terminal 400 to be associated with the end of “0, 4, 8 and the tail limit information 37 indicating C ″. Here, the tail limit information 37 is contained in a vendor specification frame that can be uniquely defined by a wireless LAN manufacturer or the like in the MAC frame.

  When the second communication control unit 421 of the plurality of communication terminals 400 in the vehicles 1b and 1c receives this beacon, it reads the MAC address in the flash ROM 440, and the end number of its own MAC address is included in the beacon. It is determined whether or not the restriction information 37 is satisfied. If the end number of the own MAC address does not satisfy the end restriction information 37, the association request accompanying the beacon is not performed, and if the end number of the own MAC address satisfies the end restriction information 37, the association accompanying the beacon. Make a request. That is, the second communication control unit 421 creates the association request communication frame 40 shown in FIG. 9 and returns it to the base station 300. The communication frame 40 also has a MAC header 41 and a MAC body 45. The MAC header 41 stores the address of the base station 300 as the destination address 42 and the address of the communication terminal 400 as the source address 43. ing. Further, the MAC body 45 contains a message 46 indicating that it is an association request.

  When the communication control unit 321 of the base station 300 receives the association request from the communication terminal 400, the source address included in the association request is passed to the storage control unit 322, and the group in the polling list 341 shown in FIG. A is stored in the MAC address area 341c of A. Then, the communication control unit 321 of the base station 300 sends an association response to the communication terminal 400 that has sent this association request, and receives an ACK (ACKnowledgement) from the communication terminal 400.

  The base station 300 relates to the above terminal data acquisition process, that is, transmission of a beacon that is a communication address notification permission (S11), reception of an association request (S12), registration of a communication address, transmission of an association response, and reception of an ACK. This is repeated for all groups until the terminal data acquisition time ends. In FIG. 7, only the beacon transmission (S 11) and the association request reception (S 12) are drawn out of the above-described processes during the terminal data acquisition process in order to simplify the drawing.

  The base station 300 executes this terminal data acquisition process basically after all the broadcast times B, Ba,. For this reason, in the present embodiment, communication terminals that are turned on while the train is running can be included in the polling list 341 without omission. Here, basically, terminal data acquisition processing based on grouping is executed at all broadcast times, Ba, and subsequent terminal data acquisition times A, Aa,..., But the train leaves the station. After that, the first time, and until the second time, since the probability of communication collision in the terminal data acquisition process is high, the terminal data acquisition process based on the grouping is executed. You may perform a terminal data acquisition process, without reducing or the number of groups. In the terminal data acquisition time for the first time, and for the second and subsequent times, the terminal data acquisition process is not executed during the entire time period, and is allocated to other communications, broadcasting supplementary data, etc. during the free time. May be.

  In the terminal data acquisition process, the communication terminal 400 does not transmit an association request even if it receives a beacon targeted for its own group after that, when an association for registering its own address has already been probable.

  The communication control unit 121 of the train broadcast data server 100 indicates that the operation information sent from the operation monitoring device 600 indicates that the arrival time to the next stop station or the distance to the next stop station is within a predetermined distance. In the case shown, a browsing history request is sent to the base station 400 via the vehicle broadcast data server 200 (S13, S14).

  Upon receiving this browsing history request, the communication control unit 321 of the base station 300 extracts one address from the MAC address area 341c of the polling list 341, and uses this address as the destination address, and the browsing history request is a communication terminal of the address. 400 (S15).

  The second communication control unit 422 of the communication terminal 400 that has received this browsing history request acquires the content ID from the browsing history table 443 of the flash RAM 440 via the storage control unit 423. As shown in FIG. 5, the browsing history table 443 includes one or more IDs of contents browsed by the communication terminal 400. And the 2nd communication control part 422 of the communication terminal 400 puts 1 or more content ID which this browsing history 443 shows in a communication packet, and returns this to the base station 300 as a response (S16).

  Upon receiving this response, the communication control unit 321 of the base station 300 passes the content ID included in this response to the storage control unit 322. When the storage control unit 322 receives the content ID, the storage control unit 322 stores the browsing result corresponding to the content ID in the browsing history table 343 of the flash ROM 340.

  Specifically, as shown in FIG. 5, the browsing history table 343 of the base station 300 includes a content ID area in which a content ID is stored and a browsing number area in which the number of browsing contents of the content ID is stored. . If the content ID received from the communication control unit 321 is not stored in the content ID area of the browsing history table 343, the storage control unit 322 stores the content ID in the content ID area and the number of browsing for the content ID. “1” is stored in the area. If the content ID received from the communication control unit 321 is stored in the content ID area of the browsing history table 343, “1” is added to the numerical value in the browsing number area for the content ID.

  The communication control unit 321 of the base station 300 sequentially transmits the above browsing history requests to the communication terminals 400 of each address stored in the MAC address area 341c of the polling list 341, and responses from the communication terminals 400. Each time it is received, the browsing result is passed to the storage control unit 322 and stored in the browsing history table 343. When the communication control unit 321 of the base station 300 sequentially transmits the above browsing history requests to the communication terminals 400 of each address stored in the MAC address area 341c of the polling list 341, and executes processing for the response. All of the data in the browsing history table 432 is sent as browsing history to the vehicle broadcast data server 200 (S17).

  The storage control unit 322 of the base station 300 responds to this request from the communication terminal 400 even though the communication control unit 321 of the base station 300 sends a browsing history request to the communication terminal 400 (S15). If no response is received, the corresponding address in the polling list is deleted. Thus, when the response to the browsing history request is not returned from the corresponding communication terminal 400, specifically, the base station 300 before the communication terminal of the customer G boarding at the A station arrives at the B station. In response to the terminal data acquisition process in (Polling response), this customer G gets off at the B station, and the train leaves the B station, and then the base station 300 transmits a browsing request in the new terminal data acquisition process. This is the case (S15). That is, this communication address deletion process is performed in order to delete the communication address of the communication terminal 400 that no longer exists in the vehicles 1b and 1c.

  When the communication control unit 221 of the vehicle broadcast data server 200 sequentially receives browsing histories from all the base stations 300 under management, the communication control unit 221 passes the browsing histories to the storage control unit 222, and the browsing history provided in the auxiliary storage device 240. Store in the table 243. As shown in FIG. 8, the browsing history table 243 includes a content ID area and a browsing number area, similarly to the browsing history table 343 of the base station 300. The browsing history table 243 stores the browsing history total results from all base stations 300 under the control of the vehicle broadcast data server 200. When receiving the browsing history from all the managed base stations 300, the communication control unit 221 of the vehicle broadcast data server 200 sends all the data in the browsing history table 243 as the browsing history to the train broadcast data server 100 (S18). .

  When the communication control unit 121 of the train broadcast data server 100 sequentially receives browsing histories from all the vehicle broadcast data servers 200 under management, the communication control unit 121 passes these to the storage control unit 122 and is provided in the auxiliary storage device 140. It is stored in the browsing history table 143. As shown in FIG. 8, the browsing history table 143 includes an operation section area in which an operation section is stored in addition to the content ID area and the browsing number area. The storage control unit 122 stores the operation section in the operation section area based on the operation information sent from the operation monitoring apparatus 600, and stores each vehicle data server in the content ID area and the browsing number area corresponding to the operation section. The browsing history from 200 is stored.

  When the communication control unit 121 of the train broadcast data server 100 receives browsing histories from all the vehicle data servers 200 under management, the communication control unit 121 sends the next stop station information to the base station 300 via the vehicle broadcast data server 200. (S20, S21). This next stop station information is the station information of the next stop station among many pieces of station information stored in the station information file 141. For this reason, as shown in FIG. 4, when the train from Tokaido Line, Tokyo, and the end of Odawara stops next at "Oiso" station, the station information of this "Oiso" station becomes the next stop station information 10b. Therefore, the storage control unit 122 reads the station information of the next stop station determined from the operation information sent from the operation monitoring device 600 from the station information file 141 and passes it to the communication control unit 121. Upon receiving this station information, the communication control unit 121 sends this station information as next stop station information to the base station 300 via the vehicle broadcast data server 200 as described above.

  When receiving the next stop station information, the communication control unit 321 of the base station 300 broadcasts the next stop station information (S22).

  When the second communication control unit 422 of the communication terminal 400 receives the next stop station information, it passes this next stop station information to the station comparison unit 427. The station comparison unit 427 reads the getting-off station information stored in the flash ROM 440, and determines whether the station indicated by the getting-off station information is the same as the station indicated by the next stop station information (S23). If the station indicated by the getting-off station information is the same as the station indicated by the next stop station information, a getting-off notification instruction is given to each of the display control unit 424 and the voice control unit 425. As a result, the voice control unit 425 creates voice data indicating that the user should get off at the next stop station, and outputs the voice data from the headphones 455. In addition, the display control unit 424 creates display data indicating that the user should get off at the next stop station, and displays a get-off notification screen 452d on the display 452 as shown in FIG. 8 (S24).

  Here, the getting-off notification is performed by sound and video, but when the communication terminal 400 is provided with a vibration function, the vibration function may be operated as the getting-off notification.

  The train 1 stops at the next stop station after the above processing is completed. When the train 1 departs from this station, the in-car broadcast system executes the process described above again.

As described above, in the present embodiment, the following effects can be obtained.
(1) In this embodiment, processing for shortening the transmission time of video broadcast content data is performed, and the time during the difference time between this transmission time and the playback time of this data is defined as the terminal data acquisition time. In addition, since the communication activity for collecting data from the communication terminal is performed, the communication activity for collecting data can be performed while maintaining the continuity of broadcasting.

That is, in this embodiment, the video terminal can be continuously displayed so as not to hinder the viewability of the video broadcast content by the owner of the communication terminal 400, and the communication terminal is used by utilizing the reverse side of the display time. We are conducting communication activities to collect data from 400.
(2) In this embodiment, the communication terminals are divided into a plurality of groups in advance by MAC addresses, etc., and the communication activity for data collection is performed for each group to reduce the number of communication objects. The probability of communication collision in this communication activity can be reduced, and this communication activity can be performed efficiently.

Note that, as described above, the technique described in Patent Document 2 described in the Background Art section establishes a connection between a number of communication terminals and a base station, and assigns an identifier to each communication terminal that has established the connection. After all the identifiers are divided into multiple groups, the communication probability during data collection after grouping can reduce the collision probability. As a result, communication activities cannot be performed efficiently.
(3) In this embodiment, the terminal data acquisition process is repeated many times with a large number of communication terminals existing in the vehicle before the train arrives at the next station from one station. Since the browsing history is collected sequentially from the many communication terminals that acquired the communication address immediately before arriving at the next station, the situation where many passengers get off and get on at the same time However, browsing history can be collected efficiently without missing.

For this reason, when the video broadcast content is an advertisement, the advertiser can appropriately determine the advertising effect of the advertisement.
(4) In this embodiment, since the operation section where the content was broadcast is included as the browsing history, when the video broadcast content is an advertisement, the advertiser can grasp the regionality of the passenger and consider the regionality You will be able to provide advertisements.

Here, the operation section in which the content is broadcast is included as the browsing history, but a broadcast time zone may also be included.
(5) In the present embodiment, the passenger can enjoy the video broadcast content, and when the passenger gets close to the getting-off station, the getting-off notification is executed, so it is possible to avoid overpassing.

  In addition, although the above embodiment is an example which applied this invention to the in-vehicle broadcast of a train, you may apply this invention to the in-vehicle broadcast of other public transportation, such as a bus and a ship. Further, the present invention may be provided not only for in-car broadcasting but also for broadcasting in a specific area.

  In this embodiment, the terminal data acquisition time is secured during the display time of the video broadcast content, and the polling list is created by acquiring the MAC address of the terminal at this time. However, the polling list is simply created. In this case, the polling list may be created by executing terminal data acquisition processing based on grouping regardless of the display time of the video broadcast content.

  In the above, a mobile phone is exemplified as the communication terminal 400. However, any communication terminal 400 may be used as long as it is not a mobile phone and can perform wireless communication with the base station 300. Good. In this case, the first communication interface 410 that wirelessly communicates with other communication devices via the mobile phone network and the first communication control unit 421 that performs this control may be omitted.

  1: Train, 1a, 1b, 1c: Vehicle, 2: Conductor room, 10: Station information, 10a: Station list information, 10b: Next stop station information, 25: Video data, 28: Time stamp, 30: Beacon communication Frame: 40: communication frame for association request, 100: train broadcast data server, 110: station side communication interface, 115: vehicle server side communication interface, 120, 220, 320, 420: CPU, 121, 221, 321, 421 422: Communication control unit, 122, 222, 322, 422: Storage control unit, 130, 230, 330, 430: RAM, 140, 240: Auxiliary storage device, 340, 440: Flash ROM, 141: Station information file, 142 : Video broadcast content file, 143, 243, 343, 443: browsing history table, 1 44, 244, 344, 444: program, 200: vehicle broadcast data server, 210: base station side communication interface, 215: train server side communication interface, 300: base station, 310: vehicle server side communication interface, 315: terminal side Communication interface, 400: communication terminal, 410: first communication interface, 415: second communication interface, 500: station server, 600: operation monitoring device

Claims (16)

In a radio base station comprising first communication means for receiving broadcast data and second communication means for wirelessly transmitting the broadcast data to one or more communication terminals,
Control means for controlling communication by the first communication means and the second communication means;
Data storage means for storing predetermined data;
Have
The control means includes
Broadcasting the broadcast data together with playback control information related to the playback speed at a transmission speed higher than the playback speed of the broadcast data at the communication terminal to the one or more communication terminals by the second communication means by a predetermined communication channel Execute broadcast processing,
The time following the broadcast time, which is the transmission time of the broadcast data, and the time during the difference time between the broadcast time and the reproduction time of the broadcast data determined by the reproduction speed information is determined from the communication terminal as the predetermined data. Terminal data acquisition time for obtaining the data, and during the terminal data acquisition time, waiting for reception of the predetermined data from the one or more communication terminals, the second communication means using the predetermined communication channel When receiving the predetermined data from the communication terminal, a terminal data acquisition process is executed for storing the predetermined data in the data storage means.
A wireless base station characterized by that. In the radio base station according to claim 1,
The reproduction control information of the broadcast data is information including a time stamp indicating the reproduction timing of the broadcast data.
A wireless base station characterized by that. In the radio base station according to any one of claims 1 and 2,
The control means allocates a plurality of the broadcast times at a timing at which broadcast data can be continuously reproduced on the communication terminal, and secures the data acquisition time following the broadcast time for each broadcast time, Execute the relevant process,
A wireless base station characterized by that. In the radio base station according to any one of claims 1 to 3,
A group in which the identifier for each communication terminal is divided into a plurality of groups according to a unique identifier assigned in advance for each communication terminal, and the group and an identifier belonging to the group are stored in association with each other Having storage means;
The data storage means is a communication address storage means for storing a communication address of a communication terminal as the predetermined data,
The control means is the terminal data acquisition process during the terminal data acquisition time,
The communication address notification permission for the communication terminal having the identifier belonging to one group of the plurality of groups is broadcasted by the second communication means, and the communication address notification permission from the communication terminal belonging to the one group is transmitted. When the second communication means receives the message, it executes a communication address acquisition process for storing the communication address included in the message in the communication address storage means, and acquires the communication addresses of the communication terminals belonging to the one group When the process is completed, the communication address acquisition process of the communication terminals belonging to another group is sequentially executed until the communication address acquisition process is completed for all the groups.
The control means causes the second communication means to sequentially communicate with a communication terminal indicated by each of the one or more communication addresses stored in the communication address storage means at a time when a predetermined condition is satisfied.
A wireless base station characterized by that. In the radio base station according to claim 4, comprising a browsing history storage means for storing a browsing history of the broadcast data,
The control means includes
The second communication means transmits the broadcast data content identification information together with the broadcast data,
At a time when the predetermined condition is satisfied, a request message for browsing history of the broadcast data is transmitted to the communication terminal indicated by each of the one or more communication addresses stored in the communication address storage means. When the second communication means receives the browsing history including the identification information of the content of the browsed broadcast data as a response to the request message, the browsing history is stored in the browsing history storage means.
A wireless base station characterized by that. The radio base station according to claim 5,
The control means includes
The browsing history stored in the browsing history storage means is transmitted to the transmission source of the broadcast data by the first communication means.
A wireless base station characterized by that. The radio base station according to claim 5 or 6,
If the second communication means does not receive a response to the request message from the communication terminal that has sent the broadcast data browsing history request message, the control means stores the communication address of the communication terminal in the communication address storage Erase from the means,
A wireless base station characterized by that. In a radio base station provided with radio communication means for radio communication with one or more communication terminals,
A group in which the identifier for each communication terminal is divided into a plurality of groups according to a unique identifier assigned in advance for each communication terminal, and the group and an identifier belonging to the group are stored in association with each other Storage means;
A communication address storage means for storing a communication address of the communication terminal;
Control means for controlling communication by the first communication means and the second communication means;
Have
A communication address notification permission for a communication terminal having an identifier belonging to one group of the plurality of groups is broadcasted by the wireless communication means, and a message for the communication address notification permission from the communication terminal belonging to the one group Is received by the wireless communication means, a communication address acquisition process for storing a communication address included in the message in the communication address storage means is executed, and a communication address acquisition process for communication terminals belonging to the one group is performed. When finished, the communication address acquisition process of communication terminals belonging to another group is sequentially executed until the communication address acquisition process for all groups is completed,
The wireless communication means sequentially communicates with a communication terminal indicated by one or more communication addresses stored in the communication address storage means at a time that satisfies a predetermined condition.
A wireless base station characterized by that. In the radio base station according to any one of claims 4 to 8,
The unique identifier assigned in advance for each communication terminal is a MAC address.
A wireless base station characterized by that. The radio base station according to any one of claims 1 to 4,
A broadcast data server for sending the broadcast data to the radio base station;
With
The broadcast data server is
First communication means for communicating with the outside and receiving the broadcast data;
Broadcast data storage means for storing the broadcast data;
Second communication means for communicating with the radio base station and transmitting the broadcast data stored in the broadcast data storage means to the radio base station;
Control means for controlling the first communication means and the second communication means, and storing the broadcast data received by the first communication means in the broadcast data storage means;
A broadcasting system characterized by comprising: The radio base station according to any one of claims 5 to 7,
A broadcast data server for sending the broadcast data to the radio base station;
With
The broadcast data server is
First communication means for communicating with the outside and receiving the broadcast data;
Broadcast data storage means for storing the broadcast data;
Second communication means for communicating with the radio base station and transmitting the broadcast data stored in the broadcast data storage means to the radio base station;
Browsing history storage means for storing the browsing history;
Controlling the first communication means and the second communication means, storing the broadcast data received by the first communication means in the broadcast data storage means, and viewing the browsing history received by the second communication means; Control means for storing in the history storage means;
A broadcasting system characterized by comprising: The broadcasting system according to claim 10, wherein
The radio base station and the broadcast data server are installed in a vehicle,
The broadcast data server is
Operation information acquisition means for acquiring all stop point names at which the vehicle stops and the current vehicle position;
While creating stop point list information using all the stop point names acquired by the operation information acquisition means, the next stop point information indicating the next stop point from the stop point name and the current vehicle position Operation broadcast information creation means to create;
Have
The control means of the broadcast data server causes the second communication means to transmit each of the stop point list information and the next stop point information to the radio base station according to the current vehicle position, After transmission of the stop point list information and before transmission of the next stop point information, the broadcast time and the data acquisition time are secured, and the broadcast data is transmitted to the radio base station by the second communication means. When the predetermined data received by the second communication means is stored in the data storage means, and the broadcast data is transmitted by the second communication means, the radio base station transmits the broadcast data to the data storage means. Transmitting the broadcast data and the reproduction control information at a transmission speed when transmitting to one or more communication terminals;
The control means of the radio base station, when the first communication means of the radio base station receives the stop point list information, the broadcast data, and the next stop point information, according to the receiving order, The second communication means causes the stop point list information, the broadcast data, and the next stop point information to be transmitted.
A broadcasting system characterized by that. The broadcasting system according to claim 11,
The radio base station and the broadcast data server are installed in a vehicle,
The broadcast data server is
Operation information acquisition means for acquiring all stop point names at which the vehicle stops and the current vehicle position;
While creating stop point list information using all the stop point names acquired by the operation information acquisition means, the next stop point information indicating the next stop point from the stop point name and the current vehicle position Operation broadcast information creation means to create;
Have
The control means of the broadcast data server causes the second communication means to transmit each of the stop point list information and the next stop point information to the radio base station according to the current vehicle position, After transmission of the stop point list information and before transmission of the next stop point information, the broadcast time and the data acquisition time are secured, and the broadcast data is transmitted to the radio base station by the second communication means. When the predetermined data received by the second communication means is stored in the data storage means, and the broadcast data is transmitted by the second communication means, the radio base station transmits the broadcast data to the data storage means. Transmitting the broadcast data and the reproduction control information at a transmission speed when transmitting to one or more communication terminals;
The control means of the radio base station, when the first communication means of the radio base station receives the stop point list information, the broadcast data, and the next stop point information, according to the receiving order, The second communication means transmits the stop point list information, the broadcast data, and the next stop point information, and requests the browsing history after the transmission of the broadcast data and before the transmission of the next stop point information. Send a message,
A broadcasting system characterized by that. In a control method for a radio base station, comprising: first communication means for receiving broadcast data; and second communication means for wirelessly transmitting the broadcast data to one or more communication terminals.
Broadcasting the broadcast data together with playback control information related to the playback speed at a transmission speed higher than the playback speed of the broadcast data at the communication terminal to the one or more communication terminals by the second communication means by a predetermined communication channel Broadcast processing to be sent in,
The time following the broadcast time, which is the transmission time of the broadcast data, and the time during the difference time between the broadcast time and the reproduction time of the broadcast data determined by the reproduction speed information is determined from the communication terminal as the predetermined data. Terminal data acquisition time for obtaining the data, and during the terminal data acquisition time, waiting for reception of the predetermined data from the one or more communication terminals, the second communication means using the predetermined communication channel Receiving the predetermined data from the communication terminal, a terminal data acquisition process for storing the predetermined data in the data storage means;
A control method for a radio base station, characterized in that The radio base station control method according to claim 14,
The data storage means is a communication address storage means for storing a communication address of a communication terminal as the predetermined data,
According to a unique identifier assigned in advance for each communication terminal, the identifier for each communication terminal is divided into a plurality of groups,
During the terminal data acquisition time, a communication address notification permission to a communication terminal having an identifier belonging to one group among the plurality of groups is broadcasted by the second communication means, and the communication terminal belonging to the one group When the second communication means receives the message for the communication address notification permission from the communication address, the communication address acquisition process is performed to store the communication address included in the message in the communication address storage means, and the one group When the communication address acquisition process of the communication terminals belonging to is completed, the communication address acquisition process of the communication terminals belonging to another group is sequentially executed until the communication address acquisition process is completed for all the groups,
Communicating with each communication terminal indicated by one or more communication addresses stored in the communication address storage means at the time when a predetermined condition is satisfied, sequentially by the second communication means,
A control method for a radio base station. In a control method for a radio base station comprising radio communication means for radio communication with one or more communication terminals,
According to a unique identifier assigned in advance for each communication terminal, the identifier for each communication terminal is divided into a plurality of groups,
A communication address notification permission for a communication terminal having an identifier belonging to one group of the plurality of groups is broadcasted by the wireless communication means, and a message for the communication address notification permission from the communication terminal belonging to the one group Is received by the wireless communication means, the communication address acquisition process is executed to store the communication address included in the message in the communication address storage means, and the communication address acquisition process of the communication terminals belonging to the one group is completed. Then, until the communication address acquisition processing for all groups is completed, the communication address acquisition processing of communication terminals belonging to another group is sequentially executed,
The wireless communication means sequentially communicates with each communication terminal indicated by one or more communication addresses stored in the communication address storage means at a time that satisfies a predetermined condition.
A control method for a radio base station.

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