JP6854006B2 - Communication systems, communication methods and programs - Google Patents

Description

The present invention relates to a communication system, a communication method and a program, and more particularly to a communication system including a transmitting device and a movable receiving device.

In Patent Document 1, the applicant applies Plug and Play (hereinafter, also referred to as PnP) technology between a mobile vehicle-mounted server or between a mobile vehicle-mounted server and a peripheral device. Proposed to communicate.

Further, as a method for reducing the burden of pairing between wireless communication devices, for example, it is known to perform Bluetooth (registered trademark) pairing using near field type short-range wireless communication (NFC).

Japanese Unexamined Patent Publication No. 2015-170311

In the technique described in Patent Document 1, the PnP technique is applied to perform a process of notifying a service that can be provided, and then a process of transmitting and receiving data. Here, there is a certain limit on the time during which the mobile body stays within the communicable range, and during that time, notification processing and data transmission / reception processing are performed. Even in the case of inter-vehicle communication, there is a possibility that the communication is stable and a certain period of time can be secured, for example, when the communication is stopped due to waiting for a signal or the like. However, in the case of a moving body that is moving, the time that can be used for data transmission / reception processing may decrease.

Further, in the pairing between wireless communication devices using the conventional short-range wireless communication, it is utilized that the short-range wireless communication is in a one-to-one communication state. However, a mobile communication device may be in a situation where it can communicate with a large number of devices and the like. Further, for example, if an in-vehicle server mounted on an automobile and a peripheral device are connected by short-range wireless communication, the automobile is made to collide with the peripheral device. This is clearly unrealistic. As described above, the connection process using short-range wireless communication cannot be applied to the connection process of a general mobile communication device.

Therefore, the present invention provides a communication system or the like suitable for effectively utilizing a communicable area when a transmitting device and a movable receiving device communicate using PnP. The purpose is.

The first aspect of the present invention is a communication system including a transmitting device and a movable receiving device, wherein the transmitting device includes a transmitting side long-range communication means, a transmitting side short-range communication means, and PnP. The receiving device includes an information notification means and a service providing means, and the receiving device includes a receiving side long-distance communication means, a receiving side short-distance communication means, a PnP information receiving means, and a service enjoying means, and the transmitting side long-distance communication. The communicable distance of the means and the receiving side long-distance communication means is longer than the communicable distance of the transmitting side short-distance communication means and the receiving side short-distance communication means, and the receiving side long-distance communication means is the transmitting side. The information transmitted by the long-distance communication means is received, the receiving-side short-distance communication means performs data communication with the transmitting-side short-distance communication means, and the service providing means is the transmitting-side short-distance communication means. The PnP information notifying means announces PnP information using the transmitting side long-distance communication means, and the PnP information specifies a service that specifies a service that can be provided by the service providing means. Information and connection information for the receiving side short-range communication means to connect to the transmitting side short-range communication means are included, and the PnP information receiving means uses the receiving side long-range communication means to announce the PnP information. Upon receiving the PnP information announced by the means, the service enjoying means determines whether or not to receive the service provided by the service providing means by referring to the service specific information included in the PnP information, and determines whether or not to receive the service provided by the service providing means. With reference to the connection information included in the information, the receiving side short-range communication means prepares for connection to connect to the transmitting side short-range communication means, and the service enjoying means is connected to the transmitting side short-range communication means. When the receiving side short-range communication means cannot communicate, the connection waits, and when the transmitting side short-range communication means and the receiving side short-range communication means can communicate with each other, the transmitting side short-range communication means. And the receiving side short-distance communication means are connected to make a request for use of the service to be provided, and the service enjoying means provides the service for which the usage request is received to the service enjoying means.

The second aspect of the present invention is the communication system of the first aspect, the service providing means provides measurement information obtained by one or a plurality of sensors, and the service specific information is measurement information. The service enjoying means is connected to the service providing means when the measurement information provided by the service providing means is obtained by one sensor. It is determined whether to receive the measurement information of the one sensor or not to connect to the service providing means, and when the measurement information provided by the service providing means is obtained by a plurality of sensors, the service is provided. Whether to connect to the means to receive all the measurement information of the plurality of sensors, to connect to the service providing means to receive some measurement information of the plurality of sensors, or not to connect to the service providing means. The service providing means requests the service providing means to use a part or all of the service, and the service providing means requests the service receiving means to use the service from the service receiving means. It provides some or all of the requested services.

A third aspect of the present invention is the communication system according to the first or second aspect, wherein the transmitting side long-distance communication means includes a beacon signal transmitting means for transmitting beacon information and the receiving side long-distance communication means. The PnP information notifying means includes the PnP information in the beacon signal transmitted by the beacon signal transmitting means, announces the PnP information, and announces the PnP information, and receives the PnP information. The device connects to the transmitting side short-distance communication means instead of the long-distance data communication means to receive the service.

A fourth aspect of the present invention is a communication system according to any one of the first to third aspects, wherein there are a plurality of the transmission devices, and the PnP information notification means included in the transmission device is another transmission. When the PnP information is received from the device, the PnP information is announced including the position information of the other transmitting device and the service that the service providing means included in the other transmitting device can provide.

A sixth aspect of the present invention is a method of communicating between a transmitting device and a movable receiving device, wherein the transmitting device includes a transmitting side long-range communication means, a transmitting side short-range communication means, and PnP information notification. The receiving device includes means, a receiving side long-distance communication means, a receiving side short-range communication means, a PnP information receiving means, and a service enjoying means, and the transmitting side long-distance communication means and the receiving side long-distance. The communicable distance of the communication means is longer than the communicable distance of the transmitting side short-distance communication means and the receiving side short-distance communication means, and the receiving side long-distance communication means is transmitted by the transmitting side long-distance communication means. Upon receiving the information, the receiving side short-range communication means performs data communication with the transmitting side short-range communication means, and the PnP information notification means uses the transmitting side long-range communication means to perform data communication on the receiving side. The announcement step of announcing PnP information including connection information for the short-range communication means to connect to the transmission side short-range communication means, and the PnP information receiving means use the receiving side long-range communication means to announce the PnP information. And the service enjoying means prepare for connection for the receiving side short-range communication means to connect to the transmitting side short-range communication means with reference to the connection information included in the PnP information. When the preparation step and the service enjoying means cannot communicate with the transmitting side short-range communication means and the receiving side short-range communication means, the connection standby is performed, and the transmitting side short-range communication means and the receiving side short-range communication are performed. It includes a connection step for connecting the transmitting side short-range communication means and the receiving side short-range communication means when the means are ready to communicate.

A seventh aspect of the present invention is to use a computer in a communication device including a plurality of communication units having different communicable distances as a PnP information notification means and a service providing means of the first aspect, and / or a first aspect. It is a program for functioning as a PnP information receiving means and a service enjoying means.

The invention of the present application may be regarded as a computer-readable recording medium that constantly records the program of the seventh aspect.

According to each viewpoint of the present invention, in vehicle-to-vehicle communication and road-to-vehicle communication, PnP communication (exchange of connection information, sensor information, etc.) is realized by long-distance communication, and actual sensor data acquisition and the like are realized by short-distance communication. By doing so, the difference in distance between long-distance communication and short-distance communication is used to acquire authentication information for short-distance communication (high-speed communication) in advance to shorten the connection time required for data communication, and the other party can use it. It is possible to select the information to have in advance.

Further, according to the fourth aspect of the present invention, it is possible to automatically create a map of the position information of each transmitting device and the service provided by each transmitting device through the exchange of PnP information.

It is a figure which shows an example of the communication system which concerns on embodiment of this invention. It is a flow chart which shows an example of the operation of the transmission device 3 and the reception device 5 of FIG. It is a figure which shows an example of API design. It is a figure which shows the specific example of the operation of the transmitting device 3 and the receiving device 5 of FIG. It is FIG. 1 for demonstrating the case where there are a plurality of transmission devices. It is FIG. 2 for demonstrating the case where there are a plurality of transmission devices. It is a figure which shows the case where the role of both a transmitting device and a receiving device is realized by one node. It is a figure which shows an example of the process using the node 51 of FIG. It is a figure which shows the outline of the system of (a) inter-vehicle communication and (b) road-to-vehicle communication of the present invention.

Hereinafter, examples of the present invention will be described with reference to the drawings. The embodiment of the present invention is not limited to the following examples.

FIG. 1 is a diagram showing an example of a communication system according to an embodiment of the present invention. In this example, for the sake of simplicity, the case where the device that provides the service and the device that receives the service are different will be described.

The communication system 1 includes a transmitting device 3 that provides services (an example of the "transmitting device" of the present invention) and a receiving device 5 (an example of the "receiving device" of the present invention) that receives services.

An example of the configuration of the transmission device 3 will be described with reference to FIG. 1A. The transmission device 3 includes a PnP processing unit 11, a service processing unit 13, a control unit 15, and a sensor unit 17. The PnP processing unit 11 includes a transmitting side long-distance communication unit 19 (an example of the "transmitting side long-distance transmitting means" in the present claim) and a PnP information notification unit 21 (an example of the "PnP information notifying means" in the present claim). And a PnP information storage unit 23. The service processing unit 25 includes a transmitting side short-distance communication unit 25 (an example of the "sending side short-distance transmitting means" of the present claim), a service providing unit 27 (an example of the "service providing means" of the present claim), and the service providing unit 25. The sensor information storage unit 29 is provided.

An example of the configuration of the receiving device 5 will be described with reference to FIG. 1 (b). The receiving device 5 includes a PnP processing unit 31, a service processing unit 33, and a control unit 35. The PnP processing unit 31 includes a receiving side long-distance communication unit 37 (an example of the "receiving side long-distance communication means" in the present claim) and a PnP information receiving unit 39 (an example of the "PnP information receiving means" in the present claim). And a PnP information storage unit 41. The service processing unit 33 includes a receiving side short-distance communication unit 43 (an example of the "reception side short-distance communication means" in the present claim), a service enjoying unit 45 (an example of the "service enjoying means" in the present claim), and A sensor information storage unit 47 is provided. The control unit 35 includes a movement route storage unit 49.

The present invention applies PnP to realize vehicle-to-vehicle communication and road-to-vehicle communication. Here, PnP is a means for transmitting services that can be provided by a terminal or an application to a communication partner in advance. This method uses Plug and Play (PnP) for communication as a basic technology, and aims to improve convenience by properly using transmission means having different characteristics.

In the present invention, the communication between the transmitting device 3 and the receiving device 5 is roughly classified into PnP communication and data communication. The PnP communication is a communication that informs other nodes of information that identifies a service that can be provided by the transmitting device 3. Data communication is communication that provides services that can be provided and exchanges actual data.

The transmitting side long-distance communication unit 19 and the receiving side long-distance communication unit 37 are referred to as a "long-distance communication unit". The transmitting side short-distance communication unit 25 and the receiving side short-distance communication unit 43 are referred to as "short-distance communication units".

The long-distance communication unit and the short-distance communication unit will be described. As shown in Table 1, various communication units are currently prepared in the physical layer of information processing devices such as servers and smartphones. These differ in transmission characteristics such as communicable distance and communication speed. Note that each communication path having a different physical layer, such as WiFi and Ethernet (registered trademark), is referred to as a "transmission means". Different transmission means have different transmission characteristics. As a general tendency, the longer the communicable distance, the slower the communication speed, and the faster the communication speed, the shorter the communicable distance.

The long-distance communication unit and the short-distance communication unit are different transmission means (communication paths having different physical layers). The communicable distance of the long-distance communication unit is longer than the communicable distance of the short-distance communication unit. In the following, the long-distance communication unit uses LoRa in the 920 MHz band suitable for long-distance communication, and the short-distance communication unit uses WiFi as an example.

The sensor unit 17 measures one or a plurality of physical quantities. The sensor information storage unit 29 stores the measurement information obtained by the sensor unit 17. For example, it is assumed that the sensor unit measures acceleration and temperature, and the sensor information storage unit 29 stores the measurement information for 72 hours.

The service providing unit 27 provides the receiving device 5 with a part or all of the measurement information stored in the sensor information storage unit 29 in response to the usage request of the service enjoying unit 45. The service enjoyment unit 45 may, for example, request the use of both acceleration and temperature, or may request the use of acceleration only (temperature only). For example, you may request the use of measurement information measured within 24 hours. When the physical quantity measured by the sensor unit 17 is one, the service enjoying unit 45 determines whether or not to obtain the measurement information of the physical quantity, and requests the use of the physical quantity.

The PnP information storage unit 23 stores PnP information. The PnP information includes service specific information that identifies a service that can be provided by the service providing unit 27, and connection information (authentication information, etc.) for the receiving side short-distance communication unit 43 to connect to the transmitting side short-distance communication unit 25. .. In this example, the service specific information is information that specifies, for example, the type of physical quantity (acceleration, temperature, etc.) measured by the sensor unit 17, the measurement period (accumulation for 72 hours, etc.), and the like.

The PnP information notification unit 21 announces PnP information using the transmission side long-distance transmission unit 19. The PnP information receiving unit 39 receives the PnP information using the receiving side long-distance communication unit 37 and stores it in the PnP information storage unit 41.

The service enjoyment unit 45 refers to the service specific information included in the PnP information, and determines whether or not to receive the provision of a part or all of the services by the service providing means. When receiving the service, the receiving side short-range communication unit prepares for connection to connect to the transmitting side short-range communication means by referring to the connection information included in the PnP information.

The service enjoying unit 45 waits for connection when the transmitting side short-distance communication unit 13 and the receiving side short-distance communication unit 43 cannot communicate with each other. When the transmitting side short-distance communication unit 13 and the receiving side short-distance communication unit 43 are ready to communicate, the transmitting side short-distance communication unit 13 and the receiving side short-distance communication unit 43 are connected to connect the receiving side short-distance communication unit 43 to the receiving side short distance. The communication unit 43 performs data communication with the transmission side short-range communication unit 29. The service enjoyment unit 45 requests the use of some or all of the services to be provided. The service providing unit 27 uses the transmitting side short-distance communication unit 25 to provide a part or all of the services requested for use.

The control units 15 and 35 control the operations of the transmission device 3 and the reception device 5, respectively. When the user of the receiving device 5 inputs a destination, the control unit 35 searches for a route from the current location to the destination. The movement route storage unit 49 stores the route to the destination.

The amount of data of PnP information is small, and in principle, it is sent to a plurality of communication devices, and ACK is unnecessary. It may be periodically transmitted by the transmission side long-distance transmission unit 19. By periodically transmitting PnP information by the transmitting side long-distance communication unit 19, it can be treated like a beacon signal of the transmitting side short-distance communication unit 25, and the communicable distance of the beacon signal for notifying PnP information and PnP. The communicable distance of data communication using information can be made different.

In addition, the communication unit may periodically send out a beacon signal. For example, the PnP information may be announced by using the beacon signal periodically transmitted by the transmitting side long-distance communication unit 19. That is, the transmission side long-distance communication unit 19 includes a beacon signal transmission unit and a long-distance data communication unit. The beacon signal transmission unit periodically transmits beacon information. The communicable distance of the long-distance data communication unit is longer than the communicable distance of the short-distance communication unit 25. The PnP information notification unit 21 announces the PnP information by including the PnP information in the beacon signal periodically transmitted by the beacon signal transmission unit. The service enjoying unit 45 may use the receiving side short-distance communication unit 43 to connect to the transmitting side short-distance communication unit 25 instead of the transmitting side long-distance data communication unit to receive the service. Usually, for example, a beacon signal periodically transmitted by Bluetooth (registered trademark) is used for connecting by Bluetooth (registered trademark), so that the communication range of the beacon signal and data communication is almost the same. On the other hand, by using the beacon signal transmitted by the long-distance communication unit, connection information can be sent to the short-range communication unit having a high communication speed but a short communication distance by using the beacon signal having a long communication distance. It can be announced on a regular basis.

Further, the sensor information storage unit 29 is not limited to storing the measurement information measured by the transmission device 3, and may store the measurement information measured by another device. Further, the service providing unit 27 may provide other information such as contents related thereto in addition to the measurement information.

The outline of the present invention will be described with reference to FIGS. 1 (c) to 1 (e). In the communication system 1, the transmitting device 3 has a range (broken line circle) in which short-distance communication by the short-distance communication unit is possible with the receiving device 5, and long-distance communication by the long-distance communication unit is outside the range. There is a possible range (dotted circle).

As shown in FIG. 1C, when the transmitting device 3 and the receiving device 5 are sufficiently separated from each other and the receiving device 5 is outside the dotted circle, communication cannot be performed.

As shown in FIG. 1D, long-distance communication is possible when the receiving device 5 approaches the transmitting device 3, the receiving device 5 is inside the dotted circle, and is outside the broken line circle. Therefore, the receiving device 5 receives the PnP information, prepares the communication in the short-distance communication unit, and specifies the service to be provided. On the other hand, short-distance communication is not possible. Therefore, for short-distance communication, when the communication is ready, the connection standby state is set.

As shown in FIG. 1 (e), short-distance communication is possible when the receiving device 5 is closer to the transmitting device 3 and the receiving device 5 is inside the broken line circle. Therefore, the receiving device 5 receives the service provided by the transmitting device 3 by data communication using short-distance communication. As a result, preparation processes such as connection preparation and service identification are completed before short-distance communication becomes possible, so that the state in which short-distance communication is possible can be effectively utilized.

FIG. 2 is a flow chart showing an example of the operation of the transmitting device 3 and the receiving device 5 of FIG.

With reference to FIG. 2A, the control unit 15 stores PnP information in the PnP information storage unit 23 (step STA1). The PnP information notification unit 21 announces PnP information using long-distance communication (step STA2). The control unit 15 determines whether or not to modify the PnP information (step STA3). If no correction is made, the process returns to step STA2. If it is corrected, the PnP information is corrected (step STA4), and the process returns to step STA2. The modification of the PnP information will be specifically described with reference to FIG. 6 (particularly with reference to (c)) and FIG. 7 (particularly with reference to (g)).

With reference to FIG. 2B, the PnP information receiving unit 39 determines whether or not the PnP information has been received by long-distance communication (step STB1). If not received, the process of step STB1 is repeated. When the PnP information is received, it is compared with the PnP information stored in the PnP information storage unit 41 to determine whether or not the PnP information is new PnP information (step STB2). If it is not new PnP information, the process returns to step STB1. If it is new PnP information, the new PnP information is stored in the PnP information storage unit 41 (step STB3), and the process returns to step STB1. If the previously received PnP information is not received for a certain period of time, the PnP information may be deleted. Further, if the PnP information continuously received from the same transmission device is changed, the changed PnP information may be stored in the PnP information storage unit 41, and the PnP information before the change may be deleted. When the PnP information is changed, if the service enjoyment unit 45 is in the connection standby state, the service enjoyment unit 45 changes to the connection standby state based on the changed PnP information instead of the connection standby state based on the PnP information before the change.

With reference to FIG. 2C, the service enjoyment unit 45 determines whether or not new PnP information is stored in the PnP information storage unit 41 (step STC1). If new PnP information is not stored, the process proceeds to step STC4. When the new PnP information is stored, it is determined whether or not to use a part or all of the services provided by the transmitting device (step STC2). If not used, proceed to step STC4. If it is to be used, preparations for connecting to the transmission side short-range communication unit 25 of the transmission device 5 that announces new PnP information and preparations for a usage request to the service provision unit 27 are made (step STC3), and the step Proceed to STC4.

In step STC4, the receiving side short-distance communication unit 43 is waiting for the connection preparation for short-distance communication with the transmitting side short-distance communication unit 25 to be completed and to approach the distance where short-distance communication is possible. Judge whether it is in the connection standby state. If it is not in the connection standby state, the process returns to step STC1. If it is in the connection standby state, it is determined whether or not short-distance communication is possible (step STC5). If short-distance communication is not possible, the connection standby state is left and the process returns to step STC1. If short-distance communication is possible, the receiving-side short-distance communication unit 43 performs connection processing to the transmitting-side short-distance communication unit 25 (step STC6), and the service enjoying unit 45 requests the service providing unit 27 to use the service. (Step STC7), the service enjoying unit 45 receives the service provided by the service providing unit 27 (step STC8), and returns to step STC1.

With reference to FIG. 2D, the service providing unit 27 determines whether or not there is a usage request from the service enjoying unit 45 using the short-distance communication (step STD1). If there is no usage request, the process returns to step STD1. If there is a usage request, the service for which the usage request has been made is provided using short-distance communication (step STD2), and the process returns to step STD1.

FIG. 3 shows an example of API design.

The network information list will be described with reference to FIGS. 3A and 3C. The URI is / network / restapi /. Of the arguments in FIG. 3A, the UUID, network type code, and network ID of the vehicle-mounted server are indispensable. FIG. 3C shows an example of the JSON format.

The service information list will be described with reference to FIGS. 3 (b) and 3 (d). The URI is / service / restapi /. Of the arguments in FIG. 3B, the UUID and service type code of the in-vehicle server, and the network type code and server URI for registration and update are indispensable. (D) shows an example of the JSON format.

A specific example of the operation of the transmitting device 3 and the receiving device 5 of FIG. 1 will be described with reference to FIG. With reference to FIG. 4A, the sensor unit 17 of the transmission device 3 measures the air temperature with a temperature sensor, and photographs a predetermined portion with a surveillance camera. The transmission device 3 announces the self-function list and the authentication information as PnP information. The temperature sensor function and the surveillance camera function are registered in the self-function list. The receiving device 5 receives the PnP information. With reference to FIG. 4B, the receiving device 5 requests the transmitting device 3 to use the surveillance camera function registered in the self-function list of the transmitting device 3. With reference to FIG. 4C, the transmitting device 3 provides the receiving device 5 with image information taken by the surveillance camera in response to a usage request.

FIG. 4D is a sequence diagram showing an example of the operation of the transmitting device 3 and the receiving device 5. The APP of the transmission device 3 registers the function in the PnP Stack. The PnP Stack of the transmitting device 3 announces the self-function list to the PnP Stack of the receiving device 5. In the receiving device 5, the APP refers to the self-function list of the PnP STack and requests data from the Data Stack. The Data Stack of the receiving device 5 requests data from the Data Stack of the transmitting device 3. In the transmitting device 3, the Data Stqack refers to the data of the APP and notifies the Data Stack of the receiving device 5. The Data Stack of the receiving device 5 notifies the APP of the notified data.

A case where there are a plurality of transmitting devices will be described with reference to FIG.

FIG. 5A describes an example of determining the transmitting device 3 to be connected by using the moving path stored in the moving path storage unit 49 of the receiving device 5. It is assumed that the PnP information of each transmission device 3 includes the position information of the transmission device. 5 (a), the receiving apparatus 5 is in the range of long distance of the two transmission devices of the transmitting device A (3 ₁₎ and the transmission device B (3 _2). Here, comparing the position of each transmitting device with the moving path of the receiving device 3, it is expected that the destination is on the extension of the transmitting device B and does not reach the range of the short-range communication of the transmitting device A. Suppose. At this time, the receiving device 5 prepares for the short-distance communication of the transmitting device B, and does not prepare for the short-distance communication of the transmitting device A. As a result, in the receiving device 5, the connection preparation process of the transmitting device A can be omitted.

In FIG. 5 (b), the destination is located on an extension of the transmission apparatus C (3 ₃₎ and D (3 _4), the receiving device 5, and both short-range communication is expected to become available at the same time .. At this time, the degree of conformity between the sensor information required for the processing of the receiving device 5 and the function list announced by the transmitting devices C and D is determined, and the transmitting device having a large amount of necessary sensor information is preferentially connected. For example, assume that the receiving device 5 is an in-vehicle server, the transmitting device C holds the congestion information, and the transmitting device D holds the freeze information. If the season is summer, the receiving device 5 has a low need for freezing information because the possibility of freezing is low, and gives priority to the transmitting device C that holds the congestion information. On the other hand, in winter, the receiving device 5 has a high need for freezing information because the possibility of freezing increases, and the transmitting device D holding the freezing information has priority.

Another example in the case where there are a plurality of transmitting devices will be described with reference to FIG. In this example, the receiving device 5 _{cannot perform long-distance communication or short-distance communication with the transmitting device E (35} ), and can perform long-distance communication or short-distance communication with the transmitting device F ( ₃₆ ). With reference to FIG. 6A, it is assumed that the transmission device E has not initially collected the sensor information and has not announced the function list. It is assumed that the transmission device F is capturing an image by the surveillance camera function. Each transmitting device 3 transmits the information from which transmitting device 3 in the function list disclosed in the PnP information. It is assumed that the transmission device E starts collecting temperature information by the temperature sensor and starts publishing the function list with reference to FIG. 6B. With reference to FIG. 6C, the transmitting device E and the transmitting device F refer to the function list to be announced to each other, and announce the list of services provided by each transmitting device 3 as a function list. As a result, the receiving device 5 can know the service provided by the transmitting device E. Therefore, referring to FIG. 6D, the receiving device 5 requests the transmitting device F to use the temperature sensor function of the transmitting device E. The transmission device F requests the transmission device E to use the temperature sensor function. With reference to FIG. 6E, the transmitting device E relays the transmitting device F to provide the temperature sensor information to the receiving device 5.

In FIG. 6C, the transmitting device E includes its own position information in the PnP information, and the transmitting device F includes the position information of the transmitting device E in the PnP information corresponding to the service provided by the transmitting device E. By including the above, the receiving device 5 can grasp the position information of the transmitting device E and grasp the position where the information of the transmitting device E can be obtained. In this way, by managing the location information in addition to the function list by the PnP information, it is possible to create an index of "where to go and which service can be received". By utilizing this, it is possible to create a local information map that enables local production for local consumption of data that does not go through the cloud. This is expected to be used as, for example, tourist information and sales information.

With reference to FIG. 7, a case where one information processing device (also referred to as a node) realizes the roles of both the transmitting device and the receiving device will be described. The node 51 includes a PnP processing unit 53, a service processing unit 55, a control unit 57, and a sensor unit 59. The PnP processing unit 53 includes a long-distance communication unit 61, a PnP information notification unit 63, a PnP information receiving unit 65, and a PnP information storage unit 67. The service processing unit 55 includes a short-distance communication unit 69, a service providing unit 71, a service enjoying unit 73, and a sensor information storage unit 29. The control unit 57 includes a movement route storage unit 77.

The operation of each part of the node 51 of FIG. 7 is the same as the operation of the corresponding parts of the transmitting device 3 and the receiving device 5 of FIG. The PnP processing unit 53, the long-distance communication unit 61, the PnP information notification unit 63, the PnP information receiving unit 65, and the PnP information storage unit 67 are the PnP processing units 11 and 31, respectively, and the transmitting side long-distance communication unit. It corresponds to 19, the receiving side long-distance communication unit 37, the PnP information notification unit 21, the PnP information receiving unit 39, and the PnP information storage units 23 and 41. The service processing unit 55, the short-distance communication unit 69, the service providing unit 71, the service enjoying unit 73, and the sensor information storage unit 29 are the service processing units 13 and 33, the transmitting side short-distance communication unit 25, and the transmission side short-distance communication unit 25, respectively. It corresponds to the receiving side short-distance communication unit 43, the service providing unit 27, the service enjoying unit 45, and the sensor information storage units 29 and 47. The control unit 57 and the movement route storage unit 77 correspond to the control units 15 and 35 and the movement route storage unit 49, respectively. The sensor unit 59 corresponds to the sensor unit 17.

An example of the operation of the node 51 will be described with reference to FIGS. 7 (b) to 7 (d). Between the node alpha (51 ₁₎ and the node β (51 _2), explaining an example of sharing of sensor information. Node α manages temperature measurement and freezing information. Node β manages speed information and video information taken by the drive recorder. With reference to FIG. 7B, the function list is announced as PnP information to each other. With reference to FIG. 7 (c), the node β requests the node α to measure the temperature and use the freezing information, and the node α requests the node β to use the velocity information. With reference to FIG. 7D, node α provides temperature measurement information and freezing information to node β, and node β provides velocity information to node α. As a result, sensor information can be shared between the node α and the node β.

An example of processing using the node 51 will be described with reference to FIG. Here, the transmission device G (3 ₇₎ and the node [delta] (51 ₄₎ is provided with a water depth sensor that together measure the water depth of the river. It is assumed that the transmitter G and the node δ are located upstream and downstream of the river, respectively, and cannot communicate directly with each other. Node δ is close to the city area, and there are many other devices capable of short-range communication nearby. On the other hand, the transmitting device G is located in a mountain and is separated from other devices, so that short-range communication with other devices is difficult. River administrator node with γ a (51 _3), are regularly patrol the river. Therefore, the node γ periodically enters the range of short-range communication between the transmitting device G and the node δ.

With reference to FIG. 8A, when the node γ is within the range of the long-distance communication of the transmitting device G, the node γ receives the function list announced by the transmitting device G. With reference to FIG. 8B, when the node γ enters the range of the short-range communication of the transmitting device G, the node γ requests the transmitting device G to use the water depth sensor function. Then, the transmission device G provides the water depth sensor information to the node γ.

With reference to FIG. 8D, the node γ has obtained the water depth sensor information of the communication device G and announces this. When the administrator moves and node γ falls within the range of long-distance communication of node δ, nodes γ and δ publish PnP information to the other. With reference to FIG. 8E, when the node γ is within the range of the short-range communication of the node δ, the node δ requests the node γ to use the water depth sensor function of the transmission device G. With reference to FIG. 8 (f), the node γ provides the water depth sensor information of the transmission device G to the node δ. With reference to FIG. 8 (g), the node δ can provide the water depth sensor function of the transmitter G. As a result, even if the transmission device G and the node δ cannot directly communicate with each other, the local information map can be expanded by using the moving node γ. Therefore, the communication load of the transmission device G can be reduced, and long-time measurement and the like can be realized. Further, since the node γ periodically falls within the range of the long-distance communication of the transmitting device G, it is possible to detect a failure of the transmitting device G by using this.

FIG. 9 is a diagram showing an outline of (a) vehicle-to-vehicle communication and (b) road-to-vehicle communication system of the present invention. Wi-Fi connection information exchange and sensor server information exchange are performed on a communication path capable of long-distance communication but with a low capacity, and sensor data acquisition is performed on a communication path capable of short-distance communication but large capacity communication. This makes it possible to acquire authentication information for high-speed communication in advance to shorten the connection time, and to select information held by the other party in advance.

1 Communication system, 3 Transmitter, 5 Receiver, 11,31,53 PnP processing unit, 13,33,55 Service processing unit, 15,35,57 Control unit, 17,59 Sensor unit, 19 Transmitter long-distance communication , 21,63 PnP information notification unit, 23,41,67 PnP information storage unit, 25 transmitting side short-distance communication unit, 27,71 service providing unit, 29,47,75 sensor information storage unit, 37 receiving side long distance Communication unit, 39,65 PnP information receiving unit, 43 receiving side short-distance communication unit, 45,73 service enjoying unit, 49,77 mobile route storage unit, 51 nodes, 61 long-distance communication unit, 69 short-distance communication unit

Claims (6)

A communication system including a transmitting device and a movable receiving device.
The transmitting device includes a transmitting side long-distance communication means, a transmitting side short-distance communication means, a PnP information notification means, and a service providing means.
The receiving device includes a receiving side long-distance communication means, a receiving side short-distance communication means, a PnP information receiving means, and a service enjoying means.
The communicable distance of the transmitting side long-distance communication means and the receiving side long-distance communication means is longer than the communicable distance of the transmitting side short-distance communication means and the receiving side short-distance communication means.
The receiving side long-distance communication means receives the information transmitted by the transmitting side long-distance communication means, and receives the information transmitted by the transmitting side long-distance communication means.
The receiving side short-distance communication means performs data communication with the transmitting side short-distance communication means, and performs data communication with the transmitting side short-distance communication means.
The service providing means provides a service by using the transmitting side short-distance communication means.
The PnP information notifying means announces PnP information by using the transmitting side long-distance communication means.
The PnP information includes service specific information that identifies a service that can be provided by the service providing means, and connection information for the receiving side short-distance communication means to connect to the transmitting side short-distance communication means.
The PnP information receiving means receives the PnP information announced by the PnP information notifying means using the receiving side long-distance communication means, and receives the PnP information.
The means for enjoying the service is
With reference to the service specific information included in the PnP information, it is determined whether or not to receive the service provided by the service providing means.
With reference to the connection information included in the PnP information, the receiving side short-range communication means prepares for connection to connect to the transmitting side short-range communication means.
The means for enjoying the service is
When the transmitting side short-distance communication means and the receiving side short-range communication means cannot communicate with each other, the connection standby is performed.
A service that connects the transmitting side short-range communication means and the receiving side short-range communication means to receive the service when the transmitting side short-range communication means and the receiving side short-range communication means are in a state of being able to communicate with each other. Make a usage request for
The service enjoying means is a communication system that provides a service for which a usage request is received to the service enjoying means. The service providing means provides measurement information obtained by one or more sensors, and provides measurement information.
The service specific information identifies the type of sensor for which measurement information has been obtained.
The means for enjoying the service is
When the measurement information provided by the service providing means is obtained by one sensor, the service providing means is connected to receive the measurement information of the one sensor, or the service providing means is not connected to the measurement information. Decide whether
When the measurement information provided by the service providing means is obtained by a plurality of sensors, the service providing means may be connected to receive all the measurement information of the plurality of sensors, or the service providing means may receive all the measurement information. Determine whether to connect to receive some measurement information from the plurality of sensors or not to connect to the service providing means.
The service enjoying means requests the service providing means to use a part or all of the services.
The communication system according to claim 1, wherein the service providing means provides the service enjoying means with a part or all of the services for which the usage request is received from the service enjoying means. The transmitting side long-distance communication means
Beacon signal transmission means for transmitting beacon information and
A long-distance data communication means for performing data communication with the receiving side long-distance communication means is provided.
The PnP information notifying means announces the PnP information by including the PnP information in the beacon signal transmitted by the beacon signal transmitting means.
The communication system according to claim 1 or 2, wherein the receiving device is connected to the transmitting side short-distance communication means instead of the long-distance data communication means to receive a service. There are a plurality of the transmitters, and there are a plurality of the transmitters.
When the PnP information notifying means included in the transmitting device receives PnP information from another transmitting device, the PnP information can be provided with the position information of the other transmitting device and the service providing means included in the other transmitting device. The communication system according to any one of claims 1 to 3, which is publicly announced including various services. A method of communication between a transmitting device and a movable receiving device.
The transmitting device includes a transmitting side long-distance communication means, a transmitting side short-distance communication means, and a PnP information notification means.
The receiving device includes a receiving side long-distance communication means, a receiving side short-distance communication means, a PnP information receiving means, and a service enjoying means.
The communicable distance of the transmitting side long-distance communication means and the receiving side long-distance communication means is longer than the communicable distance of the transmitting side short-distance communication means and the receiving side short-distance communication means.
The receiving side long-distance communication means receives the information transmitted by the transmitting side long-distance communication means, and receives the information transmitted by the transmitting side long-distance communication means.
The receiving side short-distance communication means performs data communication with the transmitting side short-distance communication means, and performs data communication.
A public notice step in which the PnP information notifying means announces PnP information including connection information for the receiving side short-distance communication means to connect to the transmitting side short-distance communication means by using the transmitting side long-distance communication means.
The PnP information receiving means includes a receiving step of receiving the PnP information by using the receiving side long-distance communication means.
A preparatory step in which the service enjoying means prepares for connection for the receiving side short-distance communication means to connect to the transmitting side short-distance communication means by referring to the connection information included in the PnP information.
The means of enjoying the service
When the transmitting side short-distance communication means and the receiving side short-range communication means cannot communicate with each other, the connection standby is performed.
A communication method including a connection step for connecting the transmitting side short-range communication means and the receiving side short-range communication means when the transmitting side short-range communication means and the receiving side short-range communication means can communicate with each other. .. A computer in a communication device including a plurality of communication units having different communicable distances is used as the PnP information notification means and service providing means according to claim 1 and / or as the PnP information receiving means and service enjoying means according to claim 1. A program to make it work.

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