JP2009206679A - Service execution device, service execution program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication terminal for performing an application based on an ambient situation by estimating the degree of ambient congestion without using various sensors and without performing complicated calculations. <P>SOLUTION: A radio communication part M11 receives a plurality of pieces of relaying data which are relaying data being a wireless relay target and include state information indicating a predetermined state of a transmission source and the number of hops indicating the number of relays by a repeater system from the transmission source up to now. A hop summing-up part extracts the state information and the number of hops from the relaying data to analyze them when the radio communication part M11 receives the relaying data, sums up the number of hops in each state shown by the state information to generate the number of hops summing-up results. A service execution control part M16 compares the number of hops summing-up results summed up by the number of hops summing-up part with the service execution condition of a service execution condition storage area M105, determines a service program to be executed, and selects the determined service program from the service storage area M105 to execute the determined service program. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a radio communication terminal and a radio communication system characterized by information propagation by broadcast. Estimate the degree of congestion of vehicles and people from multiple arbitrary data over a certain period according to the sum of the number of hops for each state and the total number of data for each number of hops, and application and service operations according to the situation This is related to an environment-dependent application (context-aware) for changing the password.

  A method of changing the operation or service of an application according to the surrounding situation is called context-aware. For example, by using a position sensor such as GPS (Global Positioning System), when a user is located at a specific location, a voice explanation of an object placed at that location is given according to the location. It may be possible to provide specific services that depend on them. In addition, by using a camera, a weight sensor, etc., the congestion level of the place is monitored, and a service is provided according to the situation. For example, according to the degree of congestion inside the elevator, there is a service that provides voice guidance indicating that the elevator is busy or over capacity. On the other hand, ad hoc communication is characterized in that data is propagated (transferred) via a plurality of wireless communication terminals, and the number of wireless communication terminals that propagate is called the hop number. By using this number of hops, for example, it is used for data transmission control such as stopping data propagation when a certain number of hops is exceeded and preventing data from spreading.

  Patent Document 1 proposes a method of changing screen data to be displayed according to the number of hops in metadata. Patent Document 2 proposes a wireless network control method that uses the number of hops to estimate the distance from the local station to the destination wireless station and changes the quality of service that can be transmitted according to the hop value. In Patent Document 3, in order to efficiently use a connection in a network, information regarding a change in the number of hops is used when a connection rearrange request is transmitted and adjusted between a plurality of edge routers using the connection. To do.

  In a conventional environment-dependent application, various sensors such as a camera and a GPS are added to a target wireless communication terminal, and the behavior of the application or service is changed according to the change. Further, as another solution method, the surrounding environment of the target user is monitored in the infrastructure facility, and a service corresponding to the situation is provided. Therefore, the cost of installing various sensors and cameras in each wireless communication terminal and infrastructure facility has occurred. On the other hand, position estimation using ad hoc communication has been performed by performing complicated calculations such as distance and azimuth calculation.

As described above, in a service model using ad hoc communication between wireless communication terminals such as inter-vehicle communication, the number of hops and a service corresponding to the hop number are executed in a single terminal. Whether the traffic is congested is calculated by various sensors such as a camera, a vehicle detector, and a GPS attached to the vehicle or installed on the infrastructure side. On the other hand, position estimation using ad hoc communication has been performed by performing complicated calculations such as distance and azimuth calculation.
JP 2005-157475 A JP 2004-289411 A JP 2003-273908 A

This invention
(1) Without using various sensors,
(2) Another object of the present invention is to estimate the degree of congestion in the surroundings without performing complicated calculations, and to start an application or provide a service according to the surrounding situation.

The service execution apparatus according to the present invention includes:
Receiving a plurality of relay data, which are relay data to be wirelessly relayed, including state information indicating a predetermined state of the transmission source and the number of hops indicating the number of relays by the relay device from the transmission source to the present A wireless communication unit,
When the wireless communication unit receives the relay data, the state information and the number of hops are extracted from the relay data, and the state information and the hop number are analyzed to analyze the state information. A hop count totaling unit that counts the hop count for each state to create a hop count count result;
And a program execution unit for determining a service program to be executed based on the hop count totaling result totaled by the hop count totaling unit and executing the determined service program.

  According to the present invention, there is provided a service execution device that estimates the degree of congestion in the surroundings based on the total number of hops without using various sensors and does not perform complicated calculations, and executes a program according to the surrounding situation. Can be provided.

Embodiment 1 FIG.
The first embodiment will be described with reference to FIGS. FIG. 1 is an overall view showing the wireless communication terminal of Embodiment 1 and its radio wave range. In FIG. 1, wireless communication terminals 1 to 7 are wireless communication terminals, such as mobile phones, car navigation systems, and sensor nodes.
(1) Each wireless communication terminal can perform broadcast transmission of arbitrary data held by the wireless communication terminal to the surrounding area within its communicable radio wave range.
(2) Further, the wireless communication terminal can always receive data transmitted from other wireless communication terminals in the vicinity, and can further broadcast-transmit the received data to the surroundings. However, whether transmission is possible is determined depending on the status information attached to the received data. Here, each time the received data is broadcasted, the number of hops of the data is increased by one.
(3) Further, each wireless communication terminal does not hold network construction information such as routing information for network construction, and all wireless communication terminals are connectless.
(4) Radio wave range 1 to radio wave range 7 indicate radio wave ranges in which wireless communication terminal 1 to wireless communication terminal 7 can perform wireless communication, respectively. Within this radio wave range, arbitrary data can be transmitted and received between the wireless communication terminals.

The functions of the wireless communication terminal assumed in the first embodiment are listed below.
(1) Each wireless communication terminal in Embodiment 1 performs ad hoc communication. Data transmission / reception of ad hoc communication in the first embodiment is based on distribution and propagation of arbitrary data by broadcasting of each wireless communication terminal, and does not construct a network or hold a routing table. The first embodiment is connectionless.
(2) The wireless communication terminal can store arbitrary data received from surrounding wireless communication terminals.
(3) The wireless communication terminal can preferentially transmit data having a large number of hops among the accumulated arbitrary data.
(4) The number of hops in the first embodiment is the number of data propagation in ad hoc communication, and the number is transmitted each time a wireless communication terminal transmits (relays, propagates) data from another wireless communication terminal. Is increased by 1. That is, each wireless communication terminal relays data by increasing the number of hops by one when relaying data.
(5) The wireless communication terminal is in the state of “the state of itself (the wireless communication terminal that is itself)” or “the state of the vehicle (the vehicle when the wireless communication terminal is mounted on the vehicle)” in any data. It is added as information and broadcast transmission.
(6) The wireless communication terminal has a means for determining whether or not transfer is possible according to “status information” included in arbitrary data received by broadcast propagation, and for transferring the information.
(7) The wireless communication terminal extracts the state of the transmission source from “state information” attached to a plurality of arbitrary data received during a certain period, and, for example, the number of hops for each state The application operation and service operation to be held are changed according to the ratio of the sum, or according to the ratio of the maximum value or the minimum value of the number of hops for each state.

  FIG. 2 is a diagram illustrating an example of hardware resources of the wireless communication terminal M1 realized by a computer. In FIG. 2, the wireless communication terminal M1 includes a CPU 810 (Central Processing Unit: also called a central processing unit, processing unit, arithmetic unit, microprocessor, microcomputer, processor) that executes a program. The CPU 810 is connected to a ROM (Read Only Memory) 811, a RAM (Random Access Memory) 812, a display device 813, an operation key 814, a wireless communication unit 816, and a magnetic disk device 820 via a bus 825, and these hardware devices. To control. A storage device such as a flash memory may be used instead of the magnetic disk device 820.

  The RAM 812 is an example of a volatile memory. Storage media such as the ROM 811 and the magnetic disk device 820 are examples of nonvolatile memories. These are examples of a storage device or a storage unit, a storage unit, and a buffer. The wireless communication unit 816, the operation key 814, and the like are examples of an input unit and an input device. The wireless communication unit 816, the display device 813, and the like are examples of an output unit and an output device.

  The magnetic disk device 820 stores an operating system 821 (OS), a program group 823, and a file group 824. The programs in the program group 823 are executed by the CPU 810 and the operating system 821.

  The program group 823 stores a program that executes a function described as “˜unit” in the description of the embodiment described below. The program is read and executed by the CPU 810.

  In the file group 824, information described as “restriction condition”, “execution condition”, etc., “determination result”, “calculation result”, “extraction” Information described as “result”, “generation result”, “processing result of”, data, signal values, variable values, parameters, etc. are stored as items of “˜file” and “˜database”. Yes. The “˜file” and “˜database” are stored in a recording medium such as a disk or a memory. Information, data, signal values, variable values, and parameters stored in a storage medium such as a disk or memory are read out to the main memory or cache memory by the CPU 810 via a read / write circuit, and extracted, searched, referenced, compared, and calculated. • Used for CPU operations such as calculation, processing, output, and display. Information, data, signal values, variable values, and parameters are temporarily stored in the main memory, cache memory, and buffer memory during the CPU operation of extraction, search, reference, comparison, calculation, calculation, processing, output, and display. Is done.

  In the description of the embodiment described below, data and signal values are recorded on a recording medium such as a memory of the RAM 812 and a magnetic disk of the magnetic disk device 820. Data and signals are transmitted on-line via the bus 825, signal lines, cables, and other transmission media.

  Further, in the description of the embodiments described below, what is described as “to part” may be “means”, “to circuit”, and “to device”, and “to step” and “to”. “Procedure” and “˜Process” may be used. That is, what is described as “˜unit” may be realized by firmware stored in the ROM 811. Alternatively, it may be implemented only by software, only hardware such as elements, devices, substrates, wirings, etc., or a combination of software and hardware, and further a combination of firmware. Firmware and software are stored as programs in a recording medium such as a magnetic disk or a flash memory. The program is read by the CPU 810 and executed by the CPU 810. That is, the program causes the computer to function as “to part” described below. Alternatively, the procedure or method of “to part” described below is executed by a computer.

(Configuration of wireless communication terminal)
FIG. 3 is a block diagram showing a configuration of radio communication terminal M1 (service execution device) according to the first embodiment.
Note that transmission data, status information, and the like described in the description of FIG. 3 are shown in FIGS.
10 to 17 show an operation flow of the wireless communication terminal M1.
18 to 20 are diagrams for explaining the first embodiment.
FIGS. 21 to 23 are diagrams for explaining the second embodiment.
FIG. 24 is a diagram for explaining the third embodiment.

In the wireless communication terminal M1 shown in FIG. 3, each component has the following functions.
(1) The wireless communication unit M11 broadcasts and transmits arbitrary data (relay data) stored in the data storage area, or receives arbitrary data (relay data) from surrounding wireless communication terminals.
(2) The transmission control unit M12 controls the transmission of arbitrary data based on the transmission constraint conditions such as the transmission interval and transmission availability stored in the transmission constraint condition storage area M104. Further, when broadcast transmission is performed, the hop count stored in the hop count storage area M10312 of any transmission data M1031 is increased by one.
(3) The reception data processing unit M13 requests the hop number analysis unit M15 to analyze the number of hops stored in the received arbitrary data, and requests the transmission control unit M12 to perform the broadcast transfer.
(4) In response to a request from the hop number analysis unit M15, the state information analysis unit M14 analyzes the state attribute stored in the state information attached to the received arbitrary data, and returns the analysis result to the hop number analysis unit M15. To do.
(5) The hop number analysis unit M15 analyzes the number of hops for each state attribute acquired by the state information analysis unit M14 from a plurality of arbitrary data received for a certain period of time, and the count result is a hop count count result storage area. Store in M102. Note that the state information analysis unit M14 and the hop number analysis unit M15 constitute a hop number totalization unit.
(6) The service execution control unit M16 executes applications according to service execution conditions stored in the service execution condition storage area M105, and executes and changes services.
(7) The transmission data creation unit M17 creates transmission data M1031 for broadcast transmission.

(Each storage area)
(1) The state information storage area M101 is a storage area for storing the state information (FIG. 5) of the wireless communication terminal M1.
(2) The hop count counting result storage area M102 is a storage area for storing the hop count counting result (FIG. 8) analyzed by the hop count analysis unit M15.
(3) The general-purpose data storage area M103 is a data storage area for storing arbitrary data to be transmitted.
(4) The transmission constraint condition storage area M104 is a storage area for storing transmission constraint conditions (FIG. 6) representing transmission timing for transmitting arbitrary data, conditions of state information that can be transmitted, and the like.
(5) The service execution condition storage area M105 is a storage area for storing application programs stored in the service storage area M106 or service execution conditions (FIG. 9) for executing the execution behavior.
(6) The service storage area M106 is a storage area for storing application programs and services that can be executed by the wireless communication terminal M1.
(7) The hop number processing restriction condition storage area M107 stores the hop number processing restriction condition for the hop number analysis unit M15 to determine whether the received data should be counted from the state information M1011 (FIG. 5). Is a storage area.

(Transmission data M1031)
FIG. 4 shows the transmission data M1031. The transmission data M1031 is naturally received data M1031 when it is transmitted and received. The transmission data M1031 is created by each wireless communication terminal M1 by the transmission data creation unit M17 and propagated by broadcast. In this figure,
(1) The “data storage area M10311” is an arbitrary data storage area.
(2) The “hop number storage area M10312” is an area for storing the number of hops of the data, and is incremented by one every time the data is broadcast.
(3) The “status information storage area M10313” is an area in which the status information M1011 of the wireless communication terminal that first transmitted the data is stored.
(4) The “transmission constraint condition storage area M10314” stores the transmission constraint conditions in the transmission constraint condition storage area M104 of the wireless communication terminal that created the transmission data.

(Status information)
FIG. 5 is a diagram showing the state information M1011. The state information is information stored when each wireless communication terminal M1 holds the state information storage area M101 and creates transmission data. The state information can be freely set as to what kind of information is the “state information”. If the wireless communication terminal is mounted on the vehicle, The state can be set as “state information”.
In this figure,
(1) “Speed” indicates a numerical value of the traveling speed of the wireless communication terminal (vehicle).
(2) “Advancing direction” indicates the advancing direction of the wireless communication terminal (vehicle).
In the case of this figure, it represents that the wireless communication terminal M1 is traveling westward at a speed of 10 km / h. Note that FIG. 5 is an example of the state information and is not limited to this.

(Transmission constraint condition M1041)
FIG. 6 is a diagram illustrating the transmission constraint condition M1041. The transmission restriction condition M1041 is a condition used when each wireless communication terminal M1 holds the transmission restriction condition storage area M104 and transmits arbitrary data.
In this figure,
(1) “State” refers to the state of the wireless communication terminal (vehicle).
(2) “Transmission interval” refers to the transmission interval for each state.
For example, when the state of the wireless communication terminal M1 is traveling 10 km / h westward as shown in the state information of FIG. 5, the “state” corresponds to “6 to 10 km / h” and is 13 times / minute. It shows that arbitrary data can be transmitted at intervals. Note that FIG. 6 is an example of the transmission constraint condition and is not limited to this.

(Hop number processing constraint M1071)
FIG. 7 shows the hop number processing restriction condition M1071. The hop number processing restriction condition M1071 is a restriction condition for determining whether or not to perform the hop number process in a plurality of reception data M1031 received by the wireless communication terminal M1 at a predetermined time. In the figure,
(1) “State” refers to the state of the wireless communication terminal (vehicle).
(2) “Possibility of hop number processing” is a flag indicating whether or not to perform hop number processing.
For example, in the case of the hop number processing restriction condition as shown in FIG. 7, if the vehicle speed is “0 to 100 km / h”, the hop number processing is performed, but if it is more than that, the hop number processing is not performed. Point to. Note that FIG. 7 is an example of the hop number constraint condition and is not limited to this.

(Hop count total result M1021)
FIG. 8 shows the hop count summary result M1021. The hop count total result M1021 is information that each wireless communication terminal M1 analyzes and counts within a certain period of time by the hop count analysis unit M15 and holds in the hop count count storage area M102. In this figure,
(1) “Number of hops” indicates the number of hops of arbitrary data received within a certain period of time.
(2) “Number” indicates the number of each hop.
In the case of FIG.
The number of hops and the number distribution of each state “0 km / h to 5 km / h”, “6 km / h to 10 km / h”, and “11 km / h to 15 km / h” are shown. From this figure, "0 km / h to 5 km / h"
The number of hops of data received from a vehicle traveling on the road is relatively small, and the number of hops of data received from a vehicle traveling at “11 km / h to 15 km / h” is relatively large. From this result, it can be seen that the speed of the vehicle in the vicinity is slow and the speed of the vehicle in the distance is faster.

(Service execution condition M1051)
FIG. 9 shows the service execution condition M1051. The service execution condition M1051 is stored in the service execution condition storage area M105. A service execution condition M1051 in FIG. 9 shows an example of a service execution condition held by a signal controller (wireless communication terminal) connected to the traffic light in FIG. In this figure,
(1) “Service” is a service item to be executed when the hop number condition is satisfied. It is also possible to specify an application to be executed when the hop number condition is satisfied.
(2) “Hop number condition” specifies the condition of the hop number totaling result for executing the specified service.
(3) “Operation” describes an application operation when the hop number condition is satisfied. In this case, in the service for changing the split (the ratio of the blue time) to the cycle length for the signal control in the wireless communication terminal 7 (“service”), a plurality of arbitrary data acquired within a certain time as the condition of the number of hops is north. When the ratio of the maximum number of hops of the vehicle facing to the maximum number of hops of the vehicle facing west is 1: 2 ("condition"), the green time of the north-facing signal and the blue time of the west-facing signal is 1: 2. The operation of changing the blue time (“operation”) is described as follows. FIG. 9 is an example of service execution conditions and is not limited to this.

(Overall operation)
FIG. 10 is a flowchart showing the overall operation of the wireless communication terminal M1. The overall processing flow of the wireless communication terminal M1 will be described with reference to FIG. In the following description of the overall operation and operations A to F, the sequence diagram of FIG. 17 is also referred to. Each wireless communication terminal processes reception data from the reception data processing unit M13 for reception of arbitrary data (transmission data shown in FIG. 4) from other wireless communication terminals by broadcast propagation (S1). At this time, the received data processing unit M13 determines whether or not the data has been successfully received within a certain time (S2).

(If judged successful)
When it is determined that the reception data processing unit M13 has succeeded, the reception data processing unit M13 requests the hop number analysis unit M15 to analyze the reception data (transmission data in FIG. 4) (successful in S2). Upon receipt of the request, the hop number analysis unit M15 receives the “status information” stored in the status information storage area M10313 by the status information analysis unit M14 (the status information stored in the received data may be referred to as received data status information). ) Is received, the analysis result is received, the hop count is analyzed for each “state attribute” of the status information, and the hop count count result M1021 is created, reflected, and corrected, and the hop count count result is stored. Save in the area M102 (S3). Then, the service execution control unit M16 executes the application or service stored in the service storage area M106 in accordance with the service execution condition M1051 stored in the service execution condition storage area M105 (S4).

(If it is determined to have failed)
On the other hand, when reception of arbitrary data from another wireless communication terminal fails during a certain period (failed in S2), the transmission data creation unit M17 creates transmission data (S5).

  Finally, the transmission control unit M12, for the data received by the wireless communication unit M11 or the transmission data created by the transmission data creation unit M17, is stored in the hop number storage area M10312 (the number of hops newly created) The number of hops of the transmission data is zero) and is broadcast to the surroundings using the wireless communication unit M11 (S6). Then, the process returns to the reception waiting state again.

(Operation A of Transmission Control Unit M12)
FIG. 11 is a flowchart of processing of the transmission control unit M12. Processing of the transmission control unit M12 in each wireless communication terminal M1 will be described using FIG.

  First, the transmission control unit M12, when requested by another module for broadcast transmission of received data or transmission of its own transmission data, the transmission constraint condition storage area M104 or the reception data transmission constraint condition storage area M10314 (FIG. 4). ) To obtain the transmission constraint condition M1041 (T1). That is, if “success” in step S2 of FIG. 10, when step S3 ends, the transmission control unit M12 acquires the transmission constraint condition stored in the transmission constraint condition storage area M10314 of the received data, and transmits this transmission control condition. The condition is used for the received data determination process (step T2). In addition, in the case of “failure” in S2 of FIG. 10, transmission data is created. In this case, the transmission control unit M12 acquires the transmission constraint condition stored in the transmission constraint condition storage area M104, and this The transmission control condition is used for transmission data determination processing (step T2).

  Then, when the transmission data is created, the transmission control unit M12 acquires the state information M1011 from the state information storage area M101 for its own state information, inquires the transmission restriction condition M1041, and determines whether the condition is satisfied. Confirm (T2). Further, in the case of reception data, the transmission control unit M12 acquires “reception data state information” stored in the state information storage area M10313, and transmits the transmission restriction condition stored in the transmission restriction condition storage area M10314. Inquire and confirm whether the condition is satisfied (T2).

  At this time, if the condition is not satisfied in step T2, the process ends. On the other hand, when the transmission control unit M12 determines that the condition is satisfied, the transmission control unit M12 determines whether the transmission restriction condition of the corresponding one (the transmission restriction condition of the transmission restriction condition storage area M10314 or the transmission data is the reception data. For example, information on the transmission interval is acquired from the transmission constraint condition storage area M104) (T3). For example, when the state information of the own wireless communication terminal M1 is a value like the state information M1011 shown in FIG. 5, the transmission data is transmitted at an interval of 13 times / minute according to the transmission restriction condition M1041. Then, the transmission data M1031 is transmitted by the wireless communication unit M11 according to this transmission interval (T4). The same applies to received data. And it ends.

(Operation B of the received data processing unit M13)
FIG. 12 shows a flowchart of processing of the received data processing unit M13. The process of the reception data processing unit M13 will be described using FIG. First, the reception data processing unit M13 acquires reception data from another wireless communication terminal by the wireless communication unit M11 (U1). Then, the hop number analysis unit M15 is requested to perform the hop number analysis process on the received data (U2). Next, the transmission control unit M12 is requested to broadcast the received data (U3). And it ends.

(Operation C of Hop Number Analysis Unit M15)
FIG. 13 is a flowchart of the processing of the hop number analysis unit M15. The processing of the hop number analysis unit M15 will be described with reference to FIG. First, upon receiving an analysis request from the reception data processing unit M13, the hop number analysis unit M15 acquires reception data state information from the reception data M1031, and requests the state information analysis unit M14 to analyze the state (W1). The hop number analysis unit M15 receives the analysis result from the state information analysis unit M14. In addition, the hop number analysis unit M15 acquires the hop number process restriction condition M1071 from the hop number process restriction condition storage area M107 (W2). Then, the received data state information is compared with the hop number process restriction condition M1071, and it is determined whether or not the hop number process is performed (W3). For example, it is assumed that the received data status information of certain received data has the contents shown in FIG. Further, it is assumed that the hop number processing restriction condition M1071 is the content of FIG. In this case, the speed state is 10 km / h, and the hop number processing restriction condition M1071 is satisfied. Therefore, the hop number analysis unit M15 determines that the received data is a hop number processing target. Next, when the received data state information satisfies the hop number processing restriction condition M1071, the hop number analysis unit M15 refers to the hop number storage area M10312 of the received data, so that the hop for each state indicated by the received data state information The number is totaled to obtain the hop count total result M1021 (W4). Then, the hop count analysis unit M15 stores the obtained hop count count result M1021 in the hop count count result storage area M102 (W5). Then, the process ends.

(Operation D of state information analysis unit M14)
FIG. 14 is a flowchart of the process of the state information analysis unit M14. The processing of the state information analysis unit M14 will be described with reference to FIG. First, when the state information analysis unit M14 is requested to analyze the reception data state information from the hop number analysis unit M15, arbitrary data to be analyzed for the reception data state information (reception data in which the reception data state information is stored). The received data status information is obtained from (1) and analyzed (V1). Next, each state attribute of the analyzed state is analyzed (V2). Here, the “state attribute” corresponds to, for example, the “speed” value or the “traveling direction” value of the state information M1011 shown in FIG. Then, the state information analysis unit M14 returns the analysis result (the speed is 10 km / h or the traveling direction is west) of the received data state information to the requesting hop number analysis unit M15 ( V3). As described above, the state information analysis unit M14 analyzes the content of the reception data state information. Then, the process ends.

(Operation E of service execution control unit M16)
FIG. 15 is a flowchart of the process of the service execution control unit M16. The process of the service execution control unit M16 will be described using FIG. First, the service execution control unit M16 acquires the hop count total result M1021 from the hop count total result storage area M102 (X1). Next, the service execution condition M1051 is acquired from the service execution condition storage area M105 (X2). Next, it is determined whether the hop count total result M1021 satisfies the service execution condition M1051 (X3). At this time, when the service execution condition is satisfied, the service execution control unit M16 acquires the application indicated by the service execution condition M1051 from the service storage area M106 (X4). At this time, a service change content (a program for changing the service) may be used instead of the application. Then, the service execution control unit M16 executes the application (or program for changing the service) (X5). And it ends.

(Operation F of transmission data creation unit M17)
FIG. 16 is a flowchart of the process of the transmission data creation unit M17. The process of the transmission data creation unit M17 will be described with reference to FIG. First, the service execution control unit M16 stores state information (second state information) related to its own wireless communication terminal in the state information storage area M10313 of the transmission data M1031 (Y1). Next, the transmission data creation unit M17 sets the hop count in the hop count storage area M10312 of the transmission data M1031 to “0” (zero) (Y2). Next, the transmission restriction condition stored in the transmission restriction condition storage area M104 is stored in the transmission restriction condition storage area M10314 of the transmission data M1031 (Y3). Then, the transmission data creation unit M17 stores general-purpose data to be transmitted in the data storage area M10311 of the transmission data M1031 (Y4). And it ends.

Example 1
The general operation of radio communication terminal M2 in Embodiment 1 has been described above. Hereinafter, specific examples of application of the wireless communication terminal M1 according to the first embodiment will be described as Examples 1 to 3 according to the first embodiment.

  Embodiment 1 will be described with reference to FIGS. Example 1 is a right turn lane congestion elimination method in a traffic light control system using inter-vehicle communication.

  In conventional signal control equipment, the traffic flow of a vehicle is adjusted by controlling traffic signals related to the route on which the sensor is installed according to the vehicle status by a sensor such as a camera or a vehicle sensing device connected to the traffic control center. Was. In the case of the conventional method, it is necessary to install various sensors on the road side, which not only requires installation cost but also includes vehicles that cannot be detected depending on the installation location. The first embodiment solves this conventional problem, and each vehicle broadcasts vehicle information (state information) by inter-vehicle communication, and receives a plurality of vehicle information (state information) signals ( A service to be executed by the radio communication terminal M1) on the traffic light side to change the split and cycle length of its traffic light by counting the distribution of the number of hops for each other information such as turn signal information (status information) It is possible to determine the program and execute the determined service program.

  FIG. 18 is a diagram illustrating a situation assumed in the first embodiment. At the intersection where the signal Signal1_1 is disposed, there are five right-turn vehicles on the right-turn lane: a right-turn vehicle C1_R1, a right-turn vehicle C1_R2, a right-turn vehicle C1_R3, a right-turn vehicle C1_R4, and a right-turn vehicle C1_R5. Followed by two straight-ahead vehicles. Each vehicle in FIG. 18 is equipped with a wireless communication terminal M1. At this time, although the Signal 1_1 is straight blue, the straight vehicle C1_D1 and the straight vehicle C1_D2 cannot travel straight due to traffic jams of the right turn vehicle C1_R1 to the right turn vehicle C1_R5. In the first embodiment, all vehicles (wireless communication terminals M1 mounted in the respective vehicles) broadcast their own transmission data including vehicle information (status information) such as the blinker status and speed status of the vehicle (vehicle). Assuming that, transmission data including vehicle information (state information) of other vehicles is also incremented by one each time it is broadcast or transmitted. In FIG. 18, for easy understanding, the broadcast radio wave ranges of each vehicle are set as radio wave range I1_R1, radio wave range I1_R2, radio wave range I1_R3, radio wave range I1_R4, radio wave range I1_R5, radio wave range I1_D1, and radio wave range I1_D2. It is assumed that the range is a range in which vehicle information can be transmitted to at least one front and rear vehicle. For example, the hop number of the vehicle information transmitted from the right turn vehicle C1_R3 to the SigCon1_1 (the signal controller and the wireless communication terminal M1) via the right turn vehicle C1_R2 and the right turn vehicle C1_R1 is “3”.

  With the above operation, vehicle information is transmitted only once in a certain period, and vehicle information transmitted from other vehicles behind is transferred by increasing the number of hops by one. As a result, the distribution of the number of hops for each turn signal information received by the signal controller SigCon1_1 is as shown in the “distribution of the number of hops for each turn signal information” in FIG. FIG. 19A shows the hop number distribution of “straight car”, and is a result of totalizing “winker information” indicating neither right turn nor left turn. FIG. 19B shows the hop number distribution of the “right turn car”, and is a result of totalizing “winker information” indicating the right turn. From the distribution graph of FIG. 19, the signal controller SigCon1_1 has a small number of hops in the vehicle group in front of itself, that is, in the place close to the signal controller SigCon1_1, there are many right-turn vehicles and a large number of hops. It can be known that there are many left-turn vehicles in places far from the signal controller SigCon1_1. Therefore, the signal controller SigCon1_1 changes the split so that the lighting time of the right auxiliary signal is longer than the red signal and the blue signal of the signal device Signal1_1 connected to the signal controller SigCon1_1, for example. That is, the radio communication terminal M1 arranged in the traffic light executes the service program.

  As a result, not only signal control for eliminating the traffic jam in the right turn lane is possible, but also signal control for smoothing the traffic of the vehicle that should have been able to travel straight by the traffic jam in the right turn lane.

(Example 2)
Next, Embodiment 2 will be described with reference to FIGS. The second embodiment is a method for eliminating traffic congestion at an intersection in a traffic signal control system using inter-vehicle communication.

  At intersections, traffic is congested in all directions, and it is often difficult to proceed. The second embodiment solves this problem. Like the first embodiment, each vehicle broadcasts vehicle information (state information) through inter-vehicle communication and receives a plurality of vehicle information signals ( The wireless communication terminal M1 arranged in the traffic light changes the split and cycle length of its traffic light according to the ratio of the maximum number of hops for each other information such as traveling direction information (determines a service program to be executed). Can be executed).

  For example, in FIG. 21, a traffic light Signal2_1 for a vehicle facing north and a traffic light Signal2_2 for a vehicle facing east are connected to a signal controller SigCon2_1 (wireless communication terminal M1). Assume that a north-facing vehicle C2_N1 travels and an east-facing vehicle C2_E1, a vehicle C2_E2, and a vehicle C2_E3 stop at an intersection where the signal Signal2_1 and the signal Signal2_2 are arranged. At this time, as in the first embodiment, each vehicle propagates vehicle information (state information) including vector information such as the traveling direction to the signal controller SigCon2_1 (wireless communication terminal M1) by broadcast propagation. For the sake of clarity in FIG. 21, the broadcast radio wave ranges of each vehicle are a radio wave range I2_N1, a radio wave range I2_E1, a radio wave range I2_E2, and a radio wave range I2_E3. It is assumed that vehicle information propagated from the front is not propagated (transferred).

  The signal controller SigCon2_1 measures the maximum number of hops in each direction based on this vector information, thereby obtaining a “table of the maximum number of hops in each direction” as shown in FIG. In this case, the ratio of the maximum number of hops between the north-facing vehicle and the west-facing vehicle is 1: 3, and it can be seen that there are more west-facing vehicles than north-facing vehicles. Based on this result, the signal controller SigCon2_1 adjusts the split (execution of the service program) so that the time of the green signal of the traffic light Signal2_2 for the west-facing vehicle is longer than the time of the green signal of the traffic light Signal2_1 for the north-facing vehicle. Is possible.

  Further, as shown in “sum of hops in each direction” shown in FIG. 23, the signal controller SigCon2_1 can cope with a case where the number of hops due to broadcast propagation is fluid by using the sum in each direction. .

  This provides efficient splits and cycle lengths at intersections that are chronically congested and facilitates traffic at those intersections.

(Example 3)
Next, Embodiment 3 will be described with reference to FIG. The third embodiment describes a method for switching a mobile phone service according to the degree of congestion around itself. In the third embodiment, the wireless communication terminal M1 is a mobile phone.

FIG. 24 is a diagram illustrating an overall outline of the third embodiment. For example, in a busy commuter train, it is preferable to set a manner mode that turns off the ringing tone of a mobile phone. For example, it is assumed that all mobile phones broadcast their own “mobile phone state information” to the surroundings at certain intervals. In this case, “mobile phone state information” can be set freely, but is information indicating the presence of a mobile phone, for example. The broadcast “mobile phone state information” is assumed to be propagated. Each mobile phone counts the number of hops of the “mobile phone state information” that is propagated around. If there is a large percentage of “mobile phone state information” with a hop number of 1, there are many people around the mobile phone. It is estimated that the manner mode setting program is executed.

  By this method, when there are many people around, it is possible to automatically switch to the manner mode.

  In addition, as a function of the mobile phone, there is a technology that makes it difficult to see the screen from the surroundings by reducing the contrast of the mobile phone screen in order to prevent the mobile phone screen from being seen from the surroundings. However, this function is realized by changing the mode manually. However, by using the above method, when the ratio of the “cell phone status information” with a hop number of 1 is large, it is determined that there are many people in the vicinity, and the contrast of the screen of its own cell phone is automatically determined. It is possible to execute a program for switching modes so as to lower the value.

  As described above, in mobile phone applications and services, the services can be automatically switched according to the surrounding conditions.

  In the first embodiment described above, arbitrary data is broadcast-distributed / propagated to an unspecified number of surrounding wireless communication terminals, and the information sender is determined only by counting the number of hops from a plurality of wireless communication terminals received for a certain period of time. An ad hoc communication system has been described that estimates the degree of congestion in the surroundings without specifying the cost and without increasing the amount of calculation. Also, an ad hoc communication system and a wireless communication terminal that automatically change the behavior of an application or service according to the situation have been described.

  In the first embodiment described above, in a wireless communication terminal and a wireless communication system characterized by broadcast information propagation, a plurality of arbitrary data is summed up for each transmitter state and the number of data is counted for each hop number. The ad hoc communication system and the wireless communication terminal that estimate the surrounding situation by activating the service and start the service or application suitable for the situation have been described.

FIG. 2 is an overall view showing a wireless communication terminal and a radio wave range in the first embodiment. FIG. 3 is a hardware configuration diagram of the wireless communication terminal according to the first embodiment. 2 is a block diagram of a wireless communication terminal according to Embodiment 1. FIG. FIG. 3 shows a configuration of transmission data according to the first embodiment. FIG. 3 is a diagram illustrating state information according to the first embodiment. FIG. 3 is a diagram illustrating transmission constraint conditions according to the first embodiment. FIG. 3 is a diagram illustrating a hop number processing restriction condition according to the first embodiment. The figure which shows the hop count total result of Embodiment 1. FIG. FIG. 3 is a diagram illustrating service execution conditions according to the first embodiment. 3 is a flowchart showing overall processing of the wireless communication terminal according to the first embodiment. 5 is a flowchart of processing of a transmission control unit M12 according to the first embodiment. 5 is a flowchart of processing of a reception data processing unit M13 according to the first embodiment. 5 is a flowchart of processing of a hop number analysis unit 15 according to the first embodiment. 5 is a flowchart of processing of a state information analysis unit M14 according to the first embodiment. 6 is a flowchart of processing of a service execution control unit M16 according to the first embodiment. 10 is a flowchart of processing of a transmission data creation unit M17 according to the first embodiment. FIG. 3 is a sequence diagram showing overall processing of the wireless communication terminal according to the first embodiment. The figure which shows the broadcast propagation of the vehicle information of each vehicle in the intersection which has a right turn lane and an auxiliary signal in Example 1 of Embodiment 1. FIG. The example of the hop number count result utilized for the signal control in Example 1 of Embodiment 1. FIG. The figure which shows the result of having performed signal number control by totaling hop count by the signal controller Sig_Con1 in Example 1 of Embodiment 1. FIG. The figure which shows the broadcast propagation of the vehicle carrying the radio | wireless communication terminal in Example 2 of Embodiment 1, and a signal controller. The figure which shows the maximum number of hops for each direction in Example 2 of Embodiment 1. FIG. The figure which shows the sum of the number of hops for each direction in Example 2 of Embodiment 1. FIG. FIG. 5 is a diagram showing an overall outline in Example 3 of the first embodiment.

Explanation of symbols

  M1 wireless communication terminal, M11 wireless communication unit, M12 transmission control unit, M13 reception data processing unit, M14 state information analysis unit, M15 hop number analysis unit, M16 service execution control unit, M17 transmission data creation unit, M101 state information storage area , M102 hop count total result storage area, M103 general-purpose data storage area, M104 transmission restriction condition storage area, M105 service execution condition storage area, M106 service storage area, M107 hop number processing restriction condition storage area, M1031 transmission data, M10311 data storage Area, M10312 hop count storage area, M10313 status information storage area, M10314 transmission constraint condition storage area, M1011 status information, M1041 transmission constraint condition, M1071 hop count processing constraint condition, M1021 hop count count result M1051 service execution conditions.

Claims (8)

Receiving a plurality of relay data, which are relay data to be wirelessly relayed, including state information indicating a predetermined state of the transmission source and the number of hops indicating the number of relays by the relay device from the transmission source to the present A wireless communication unit,
When the wireless communication unit receives the relay data, the state information and the number of hops are extracted from the relay data, and the state information and the hop number are analyzed to analyze the state information. A hop count totaling unit that counts the hop count for each state to create a hop count count result;
A service execution apparatus comprising: a program execution unit that determines a service program to be executed based on the hop count totaling result totaled by the hop count totaling unit and executes the determined service program. The program execution unit is
2. The service execution apparatus according to claim 1, wherein a service program to be executed is determined based on at least two hop count counting results for each of the states counted by the hop count counting section. The program execution unit is
3. The service execution apparatus according to claim 1, wherein a service program to be executed is determined based on a distribution state of the hop number in the hop count totaling result. The service execution device further includes:
A service execution condition storage unit for storing a service execution condition indicating a hop number condition when the service program is executed by the program execution unit;
A program storage unit storing the service program executed by the program execution unit,
The program execution unit is
It is determined whether or not the hop count indicated by the hop count count result satisfies the hop count indicated by the service execution condition by comparing the hop count count result by the hop count count section and the service execution condition. Then, the service execution apparatus according to claim 1, wherein the service program stored in the program storage unit is executed. The wireless communication unit
Data can be sent,
The relay data received by the wireless communication unit is:
Including a transmission constraint condition indicating a condition for relaying the relay data in relation to the state indicated by the state information included in the relay data;
The service execution device further includes:
If it is determined whether the state of the state information included in the relay data satisfies the transmission constraint condition included in the relay data, and if it is determined that the transmission constraint condition is satisfied, the relay data is determined according to the transmission constraint condition The service execution apparatus according to claim 1, further comprising: a transmission control unit that causes the wireless communication unit to perform broadcast transmission. The service execution device further includes:
A state information storage unit storing second state information different from the state information included in the relay data;
A transmission data creation unit that creates transmission data including the second state information and a hop number storage area when the wireless communication unit fails to receive the relay data;
The communication control unit
6. The transmission data storing 1 indicating the hop count in the hop count storage area of the transmission data, and transmitting the transmission data storing the hop count of 1 to the wireless communication unit. Service execution device. A plurality of pieces of relay data, which is data for relaying a computer as a target of wireless relay, and includes state information indicating a predetermined state of the transmission source and the number of hops indicating the number of relays by the relay device from the transmission source to the present A wireless communication unit for receiving,
When the wireless communication unit receives the relay data, the state information and the number of hops are extracted from the relay data, and the state information and the hop number are analyzed to analyze the state information. A hop count totaling unit that counts the hop count for each state to create a hop count count result,
A program execution unit for determining a service program to be executed based on the hop count totaling result tabulated by the hop count tabulation unit and executing the determined service program;
Service execution program characterized by functioning as   A computer-readable recording medium on which the service execution program according to claim 7 is recorded.

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