WO2022190385A1 - メッセージ中継装置、車載装置、通信システム、メッセージ中継方法及びプログラム記録媒体 - Google Patents
メッセージ中継装置、車載装置、通信システム、メッセージ中継方法及びプログラム記録媒体 Download PDFInfo
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- WO2022190385A1 WO2022190385A1 PCT/JP2021/010201 JP2021010201W WO2022190385A1 WO 2022190385 A1 WO2022190385 A1 WO 2022190385A1 JP 2021010201 W JP2021010201 W JP 2021010201W WO 2022190385 A1 WO2022190385 A1 WO 2022190385A1
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- 238000000034 method Methods 0.000 title claims description 23
- 238000004891 communication Methods 0.000 title description 22
- 230000005540 biological transmission Effects 0.000 claims description 78
- 238000010586 diagram Methods 0.000 description 24
- 238000012545 processing Methods 0.000 description 10
- 230000006870 function Effects 0.000 description 6
- 230000001934 delay Effects 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004590 computer program Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/28—Cell structures using beam steering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Definitions
- the present invention relates to a message relay device, an in-vehicle device, a communication system, a message relay method, and a program recording medium.
- Vehicle-to-vehicle communication also called V2V communication; V2V stands for Vehicle-to-Vehicle
- V2V communication is being researched to exchange information about surrounding vehicles and road conditions with other vehicles.
- Vehicle-to-vehicle communication is roughly divided into direct communication using a PC5 interface and communication via a base station using a UU interface.
- Patent Document 1 discloses a distribution area determination unit that determines a distribution area in which a plurality of mobile bodies to be distributed information are located, and a distribution area determining unit that determines a distribution area in which a plurality of mobile bodies to be distributed information are located, and based on position information of the plurality of mobile bodies located in the distribution area.
- a transmission target determination unit that selects and determines a mobile object for unicast transmission via a mobile communication base station; and a unicast transmission target mobile object via the mobile communication base station.
- an information transmission unit that performs cast transmission.
- the server of Patent Literature 1 determines an area to distribute the dangerous event information based on the content of the received information (see paragraph 0038). Then, a vehicle located within the distribution area is selected based on the positional information of the moving body (vehicle) grasped in advance (see paragraph 0039).
- An object of the present invention is to provide a message relay device, an in-vehicle device, a communication system, a message relay method, and a program recording medium that can contribute to reducing transmission delays in communication between mobile units via a base station.
- a delivery request is sent from a first antenna pointing in a first direction, a second antenna pointing in a second direction different from the first direction, and one mobile object.
- setting information defining a relationship between a receiving unit capable of receiving a message including area information and directed to another mobile unit, and a distribution request area indicated in the distribution request area information and an antenna to be selected, the first and the second antenna, and a transmitter for transmitting a message received by the receiver using the selected antenna.
- an in-vehicle device comprising means for transmitting a message for another mobile object containing the delivery request area information to the message relay device described above.
- a third aspect provides a communication system including the above message relay device and the above vehicle-mounted device.
- a message relay device comprising a first antenna pointing in a first direction and a second antenna pointing in a second direction different from the first direction, Receives a message for another mobile including distribution request area information from one mobile, and based on setting information that defines the relationship between the distribution request area indicated in the distribution request area information and the antenna to be selected, A message relay method is provided for selecting one of the first antenna and the second antenna and transmitting the received message using the selected antenna. The method is tied to a particular machine, a message repeater with said first and second antennas.
- the vehicle-mounted device transmits a message for another mobile object including delivery request area information to the message relay device, and transmits the message relay device to the delivery request area information.
- One of the first antenna and the second antenna is selected based on setting information that defines the relationship between the indicated distribution request area and the antenna to be selected, and reception is performed using the selected antenna.
- a message relay method is provided that causes a message to be sent. The method is tied to a particular machine, a vehicle-mounted device capable of transmitting messages to a message relay device equipped with said first and second antennas.
- a computer program (hereinafter “program") is provided for realizing each function of the message relay device and the vehicle-mounted device described above.
- This program is input to the computer device via an input device or an external communication interface, stored in a storage device, and drives the processor according to predetermined steps or processes.
- this program can display the results of processing, including intermediate states, at each stage via a display device as required, or can communicate with the outside via a communication interface.
- a computer device for that purpose typically includes a processor, a storage device, an input device, a communication interface, and optionally a display device, which are interconnected by a bus, as an example.
- the program can also be recorded on a computer-readable (non-transitory) storage medium.
- FIG. 2 is a schematic diagram showing the arrangement of antennas in the base station according to the first embodiment of the present invention
- FIG. 4 is a diagram for explaining the contents of a message type included in a message by the in-vehicle device according to the first embodiment of the present invention
- FIG. 4 is a diagram for explaining processing contents by message type by the base station according to the first embodiment of the present invention
- FIG. 4 is a diagram showing an example of setting information set in the base station according to the first embodiment of the present invention
- FIG. FIG. 4 is a diagram for explaining the operation of the base station according to the first embodiment of the present invention
- FIG. 4 is a diagram for explaining the operation of the base station according to the first embodiment of the present invention
- FIG. 9 is a diagram for explaining the operation of the base station according to the second embodiment of the present invention
- FIG. 10 is a diagram showing the positional relationship between a base station and adjacent base stations according to the third embodiment of the present invention
- FIG. 12 is a diagram for explaining processing contents by message type by the base station according to the third embodiment of the present invention
- FIG. 4 is a diagram showing an example of setting information set in the base station according to the first embodiment of the present invention
- FIG. 4 is a diagram for explaining the operation of the base station according to the first embodiment of the present invention
- FIG. 12 is a diagram for explaining the operation of the base station according to the third embodiment of the present invention.
- FIG. 12 is a diagram for explaining the operation of the base station according to the third embodiment of the present invention. It is a figure which shows the structure of the computer mounted in the message relay apparatus or vehicle-mounted apparatus of this invention.
- connection lines between blocks in drawings and the like referred to in the following description include both bidirectional and unidirectional connections.
- the unidirectional arrows schematically show the flow of main signals (data) and do not exclude bidirectionality.
- a program is executed via a computer device, and the computer device includes, for example, a processor, a storage device, an input device, a communication interface, and, if necessary, a display device.
- this computer device is configured to be able to communicate with internal or external devices (including computers) via a communication interface, regardless of whether it is wired or wireless. Also, although there are ports or interfaces at the input/output connection points of each block in the figure, they are omitted from the drawing.
- a message receiving unit comprising a first antenna 14, a second antenna 15, a receiving unit 11, an antenna selecting unit 12 and a transmitting unit 13 is provided. It can be realized by a relay device.
- the first antenna 14 points in the first direction.
- a second antenna 15 points in a second direction different from the first direction.
- the receiving unit 11 receives a message for another mobile including distribution request area information from one mobile 20 via one of the antennas 14 and 15 .
- this distribution request area information for example, information that directly or indirectly designates the transmission areas (distribution request areas) of the antennas 14 and 15 can be used.
- directly specifying information it is possible to adopt a method of distributing location information and arrangement information of transmission areas (distribution request areas) corresponding to traveling sections of roads to the moving body 20 in advance. .
- the antenna selection unit 12 selects one of the first antenna 14 and the second antenna 15 based on setting information that defines the relationship between the distribution request area and the selected antenna. Further, when a distribution request area not defined in the setting information is set, the antenna selection unit 12 does not select an antenna.
- FIG. it is also possible to adopt a method of determining the delivery area by a more sophisticated method according to the message content.
- the transmitting section 13 uses the antenna selected by the antenna selecting section 12 to transmit the message received by the receiving section 11 .
- FIG. 2 is a diagram for explaining the operation of one embodiment of the present invention.
- the moving object 20 acquires information that it wants to notify to other moving objects.
- the moving body 20 has detected an accident in front of the area 11 (Area11).
- the mobile 20 uses broadcasting to send a message intended for other mobiles containing the delivery request area information.
- the area 12 (Area 12) that can be transmitted by the antenna 15 of the message relay device 10 is designated as the delivery request area information.
- the message relay device 10 that receives such a message for another mobile operates as follows.
- the antenna selection unit 12 refers to the setting information and selects the antenna 15 corresponding to the distribution request area 12 (Area12) from among the antennas 14 and 15 .
- the transmitter 13 broadcasts the message received by the receiver 11 using the antenna 15 selected by the antenna selector 12 .
- the message sent by the mobile unit 20 and intended for other mobile units is broadcast to the area 12 (Area 12) using the antenna 15 of the message relay device 10.
- FIG. As a result, other moving bodies located in area 12 can obtain information that an accident has occurred in front of area 11 (Area11).
- FIG. 3 shows the message relay device 10 when the delivery request area indicated by the delivery area information is the delivery area X2 of another message relay device X other than the message relay device 10.
- the antenna selection unit 12 refers to the setting information and does not select an antenna when it determines that neither of the antennas 14 and 15 is supported. Since antenna selection is not performed, the transmitting section 13 also suppresses transmission of the message received by the receiving section 11 .
- the distribution request area is an area that is not compatible with any of the antennas 14 and 15, it is possible to save radio wave resources by suppressing message transmission using broadcast. .
- FIG. 4 is a diagram showing the configuration of the first embodiment of the present invention.
- a configuration including a base station 100 and a vehicle 200 equipped with an in-vehicle device 210 capable of transmitting a message for another mobile object such as another vehicle containing message type information to the base station 100. It is shown.
- the base station 100 is a base station that functions as a message relay device.
- a fifth-generation communication system (5G) used for realizing communication between vehicles and road infrastructure called C-V2X or a base station compatible with LTE (Long Term Evolution) can be used.
- C-V2X a fifth-generation communication system
- LTE Long Term Evolution
- the base station 100 will be described as a base station compatible with 5G.
- the in-vehicle device 210 mounted on the vehicle 200 includes a message creation unit 211 and a message transmission unit 212.
- the message creation unit 211 operates when a predetermined event occurs, and creates a message for other mobile units containing information called a message type that can be interpreted by the antenna selection unit 102 (FIG. 5) of the base station. .
- the text (body) of the message can include information for reporting the occurrence of an accident or the like, the existence of falling objects, damage to the road, and the like.
- the message transmission unit 212 transmits the message created by the message creation unit 211 to the base station 100 . Details of the message type will be described in detail later with reference to FIG.
- FIG. 5 is a diagram showing the configuration of a base station according to the first embodiment of the present invention.
- a configuration including three antennas 104 to 106, reception section 101, antenna selection section 102, and transmission section 103 is shown.
- antennas 104-106 are directional antennas, each having an angular coverage of approximately 120°.
- antennas 104 to 106 are capable of transmitting messages to areas A104 to A106, respectively.
- the receiving unit 101 When the receiving unit 101 receives a message for another mobile object from the vehicle 200, it notifies the antenna selecting unit 102 of the combination of the message type and the receiving antenna included in the header or the like.
- Antenna selection section 102 selects a transmission antenna from the message type and reception antenna information based on preset setting information.
- Transmitter 103 broadcasts a message from the antenna selected by antenna selector 102 .
- FIG. 7 is a diagram for explaining the content of the message type included in the message by the in-vehicle device 210 of this embodiment.
- the message type of this embodiment is composed of a combination of two information elements.
- the first information element indicates the traveling direction (absolute bearing) of the vehicle, and "1" is east (E), "2" is north (N), "3" is west (W), and "4" is Represents South (S).
- the second information element indicates the message transmission request direction as viewed from the vehicle, with "1" indicating the front (F) and "2" indicating the rear (R).
- message type 1-1 indicates that the message is requested to be transmitted forward from a vehicle heading east.
- message types 1-2 indicate that the message is requested to be transmitted backwards from a vehicle heading east.
- FIG. 8 is a diagram for explaining the processing contents of messages received by the antenna 104 of the base station 100 according to the first embodiment of the present invention, by message type.
- the vehicle that is the source of the message is located within a range from due south to northeast of base station 100 . If a message of type 1-1 is received from such a vehicle, the sender is traveling eastward and is required to send a message further ahead.
- base station 100 does not have an antenna capable of transmitting a message to the east of distribution area A104 of antenna 104, so base station 100 discards the message of message type 1-1. Become.
- base station 100 has antenna 105 capable of transmitting a message to area A105 west of distribution area A104 of antenna 104, so base station 100 selects antenna 105.
- FIG. 6 if a message of message type 2-1 is received, the source is traveling north and is required to send a message ahead.
- base station 100 has antenna 106 capable of transmitting in area A106 north of delivery area A104 of antenna 104, so base station 100 selects antenna 106.
- base station 100 when the base station 100 receives a message of message type 2-2, the source of the message is traveling northward, and the base station 100 is requested to transmit the message to that direction. As shown in FIG. 6, base station 100 does not have an antenna capable of transmitting messages south of delivery area A104 of antenna 104, so base station 100 discards messages of message type 2-2. Become.
- FIG. 9 is a diagram showing an example of setting information set in the base station according to the first embodiment of the present invention.
- a message type to be transferred and an antenna (transmitting antenna) to be selected at that time are specified for each receiving antenna.
- Combinations not specified in the setting information are discarded because the distribution request area is the area in which the base station 100 can transmit.
- FIG. 10 is a diagram showing the operation when vehicle 200 heading east (E) from the southeast position of base station 100 discovers an accident ahead.
- message generator 211 of in-vehicle device 210 of vehicle 200 transmits message MSG (1-2) including message type 1-2 to base station 100 in order to inform the following vehicle of the occurrence of the accident. .
- the base station 100 that has received the message MSG(1-2) refers to the setting information illustrated in FIG. 8 and selects the antenna 105 as the transmission antenna for the message MSG(1-2). Base station 100 then broadcasts message MSG(1-2) received from vehicle 200 using antenna 105 selected above. This enables vehicle 200 located in area A105 in FIG. 6 to receive message MSG(1-2). Note that in the above process, the transmit antenna 105 is selected without computation based on the message type contained in the message MSG(1-2). Therefore, the transmission delay becomes smaller than that of the method disclosed in Patent Document 1 or the like.
- FIG. 11 shows the operation when the vehicle 200 heading east (E) from the southeast position of the base station 100 detects an abnormality on the road on which it has traveled.
- the message generator 211 of the in-vehicle device 210 of the vehicle 200 transmits a message MSG(1-1) including the message type 1-1 to the base station 100 in order to inform the oncoming vehicle of the occurrence of the accident. .
- the base station 100 that received the message MSG(1-1) does not select an antenna because the setting information illustrated in FIG. Discard the received message MSG(1-1). This avoids wasteful use of radio resources of the base station 100 and surrounding vehicles.
- FIG. 12 is a diagram for explaining the operation of the base station according to the second embodiment of the present invention.
- the message creation unit 211a of the in-vehicle device 210a of the present embodiment can designate the number of repeated transmissions of the message in addition to the message type as the message for other mobile units.
- the message transmission interval is described as being a predetermined time, but the transmission source vehicle 200a may set an arbitrary transmission interval.
- the message for other mobile units should be made to include the transmission interval, and the base station 100a side should add a function to interpret this. Just do it.
- FIG. 13 is a diagram showing the positional relationship between a base station and adjacent base stations according to the third embodiment of the present invention.
- adjacent base stations 100-N, 100-E, 100-S, and 100-W are arranged to the north, south, east, and west of the base station 100b.
- the connections between the base station 100b and the adjacent base stations 100-N, 100-E, 100-S, and 100-W may be wired or wireless.
- the neighboring base stations 100-N, 100-E, 100-S, and 100-W will be described as having a function of transmitting a message when receiving a message transmission request from the base station 100b. .
- FIG. 14 is a diagram for explaining the contents of processing by message type by the base station 100b of this embodiment.
- the difference from the processing contents for each message type shown in FIG. 8 is that for the message types for which no transmission antenna is selected in FIG.
- the message types for which no transmission antenna is selected in FIG. For example, in the example of FIG. 8, when a message of message type 1-1 is received, the message is discarded, but in the example of FIG. , to request the transmission of a message.
- a message of message type 2-2 when a message of message type 2-2 is received, the message is discarded, but in the example of FIG. to request the transmission of a message.
- FIG. 15 is a diagram showing the operation when vehicle 200-1, which is heading west (W) southeast of base station 100b, discovers an accident ahead.
- message creation unit 211 of in-vehicle device 210 of vehicle 200-1 sends message MSG (3-2) including message type 3-2 to base station 100 in order to inform the following vehicle of the occurrence of the accident. Send.
- the base station 100b that received the message MSG(3-2) refers to the setting information illustrated in FIG. 14 and selects the adjacent base station 100-E as the transmission base station for the message MSG(3-2). . Then, the base station 100b requests the selected base station 100-E to broadcast the message MSG(3-2) received from the vehicle 200-1. Upon receiving the request, the neighboring base station 100-E broadcasts the message MSG(3-2) received from the vehicle 200-1 as requested by the base station 100b. As a result, as shown in FIG. 15, vehicles 200-2 and 200-3 following vehicle 200-1 can be notified early of the accident ahead.
- FIG. 16 is a diagram showing the operation when vehicle 200-1, which is heading east (E) from the southeast position of base station 100b, discovers that a foreign object (TIRE) has fallen in the oncoming lane while traveling. is.
- message creation unit 211 of in-vehicle device 210 of vehicle 200-1 sends message MSG(1-1) including message type 1-1 to base station 100b in order to inform the oncoming vehicle of the existence of the falling object. to send.
- the base station 100b that received the message MSG(1-1) refers to the setting information illustrated in FIG. 14 and selects the adjacent base station 100-E as the transmission base station for the message MSG(1-1). .
- the base station 100b requests the selected adjacent base station 100-E to broadcast the message MSG(1-1) received from the vehicle 200-1.
- the base station 100-E that received the request broadcasts the message MSG(1-1) received from the vehicle 200-1 as requested by the base station 100b.
- vehicles 200-2 and 200-3 traveling in the oncoming lane of vehicle 200-1 can be quickly notified of the presence of a fallen object ahead.
- the adjacent base station 100-E does not particularly select the antenna. Also good. For example, in the case of FIG. 15, when the adjacent base station 100-E is requested by the base station 100b to transmit a message of message type 3-2, the adjacent base station 100-E selects a specific antenna of the adjacent base station 100-E. It can also be configured to send messages to 200-2 only.
- the base station 100b selects an adjacent base station without considering the distance to the adjacent base station.
- the distance to the station may be considered to determine whether or not to send the message. For example, if the distance from the neighboring base station is several kilometers or more, depending on the content of the message, there is a possibility that there is no need to notify or the effect of the warning is diminished. In such a case, it is preferable that the base station 100b decides whether or not to request the neighboring base station to transmit the message, taking into consideration the contents of the message and the distance to the neighboring base station.
- the expression form of the message type is not limited to this.
- the vehicle travel direction absolute azimuth
- the left and right direction and the distance from the own vehicle may be specified.
- the distance from the own vehicle it may be possible to specify "rear, range of 300 to 1000 m from the own vehicle".
- setting information corresponding to these message types may be set in the antenna selector of the message relay device (base station) as well.
- a vehicle is assumed as a moving object, but the present invention can also be applied to relaying messages between pedestrians, flying objects (drones), and the like.
- the base station is used as the message relay device.
- a program that causes a computer (9000 in FIG. 17) functioning as a base station or an in-vehicle device of a vehicle to realize the functions of these devices.
- a computer is exemplified by a configuration comprising a CPU (Central Processing Unit) 9010, a communication interface 9020, a memory 9030, and an auxiliary storage device 9040 in FIG. That is, the CPU 9010 in FIG. 17 may execute a message transmission program and a message transfer program to update each calculation parameter held in the auxiliary storage device 9040 or the like.
- a CPU Central Processing Unit
- each part (processing means, function) of each device shown in the above-described first to third embodiments executes the above-described processing using the hardware in the processor installed in these devices. It can be implemented by a computer program that causes
- the above-described message relay device can employ a configuration in which the message is discarded when the antenna selection section does not select an antenna based on the setting information.
- the delivery request area information included in the message received by the message relay device is information specifying the transmission areas of the first and second antennas of the message relay device,
- the antenna selection unit can adopt a configuration that selects an antenna corresponding to the transmission area.
- the delivery request area information included in the message received by the message relay device is information including the traveling direction of the moving body and the transmission request direction based on the position of the moving body
- the antenna selection unit may select an antenna capable of transmitting the message based on setting information that defines a transmission antenna based on a combination of the distribution request area information and the antenna that received the message. can.
- the antenna selection unit of the message relay device described above The moving body located in the first direction is a message traveling in the first direction and having the second direction as a transmission request direction; selecting the second antenna for any message traveling in the second direction and having the first direction as a transmission request direction; A moving body positioned in the second direction is a message traveling in the second direction and having the first direction as a transmission request direction; It is possible to employ a configuration in which the first antenna is used to select a message traveling in the first direction and requesting transmission in the second direction.
- the number of transmission requests can be set for the message received by the message relay device, The transmitting unit may repeat transmission of the message at predetermined time intervals for the number of times designated as the number of transmission requests.
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Abstract
Description
続いて、本発明の第1の実施形態について図面を参照して詳細に説明する。図4は、本発明の第1の実施形態の構成を示す図である。図4を参照すると、基地局100と、この基地局100にメッセージタイプ情報を含んだ他の車両等の他の移動体向けのメッセージを送信可能な車載装置210を搭載した車両200を含む構成が示されている。
続いて、メッセージ中にメッセージの繰り返し送信回数を設定できるようにした第2の実施形態について図面を参照して詳細に説明する。第2の実施形態は、第1の実施形態とほぼ同様の構成にて実現できるので、以下、その相違点を中心に説明する。図12は、本発明の第2の実施形態の基地局の動作を説明するための図である。
続いて、メッセージタイプによって指定された配信要求エリアが1つの基地局では送信不可能なエリアであっても複数の基地局が連携により適切なエリアに配信できるようにした第3の実施形態について図面を参照して詳細に説明する。図13は、本発明の第3の実施形態の基地局と隣接基地局の位置関係を示す図である。以下の説明では、図13に示すように、基地局100bの東西南北に隣接基地局100-N、100-E、100-S、100-Wが配置されているものとして説明する。なお、基地局100bと、隣接基地局100-N、100-E、100-S、100-W間の接続は有線であっても無線であってもよい。
[第1の形態]
(上記第1の視点によるメッセージ中継装置参照)
[第2の形態]
上記したメッセージ中継装置は、前記アンテナ選択部により、前記設定情報によるアンテナの選択が行われない場合、前記メッセージを破棄する構成を採ることができる。
[第3の形態]
上記したメッセージ中継装置が受信するメッセージに含まれる前記配信要求エリア情報は、前記メッセージ中継装置の前記第1、第2のアンテナの送信エリアを指定する情報であり、
前記アンテナ選択部は、前記送信エリアに対応するアンテナを選択する構成を採ることができる。
[第4の形態]
上記したメッセージ中継装置が受信するメッセージに含まれる前記配信要求エリア情報は、前記移動体の進行方向と前記移動体の位置を基準とする送信要求方向と、を含む情報であり、
前記アンテナ選択部は、前記配信要求エリア情報と、前記メッセージを受信したアンテナとの組み合わせにより送信アンテナを定めた設定情報に基づいて、前記メッセージを送信可能なアンテナの選択を行う構成を採ることができる。
[第5の形態]
上記したメッセージ中継装置の前記アンテナ選択部は、
前記第1の方向に位置する移動体が、
前記第1の方向に進み、かつ、前記第2の方向を送信要求方向とするメッセージ、
前記第2の方向に進み、かつ、前記第1の方向を送信要求方向とするメッセージのいずれかの場合に、前記第2のアンテナを選択し、
第2の方向に位置する移動体が、
前記第2の方向に進み、かつ、前記第1の方向を送信要求方向とするメッセージ、
前記第1の方向に進み、かつ、前記第2の方向を送信要求方向とするメッセージのいずれかの場合に、前記第1のアンテナで選択する構成を採ることができる。
[第6の形態]
上記したメッセージ中継装置が受信するメッセージには、送信要求回数を設定可能であり、
前記送信部は、前記送信要求回数に指定された回数分、前記メッセージの送信を所定の時間間隔で繰り返す構成を採ることができる。
[第7の形態]
上記したメッセージ中継装置は、隣接する隣接メッセージ中継装置と接続されており、
前記配信要求エリア情報によって規定される方向に位置する隣接メッセージ中継装置に対し、前記メッセージの送信を依頼する構成を採ることができる。
[第8の形態]
(上記第2の視点による車載装置参照)
[第9の形態]
(上記第3の視点による通信システム参照)
[第10の形態]
(上記第4の視点によるメッセージ中継方法参照)
[第11の形態]
(上記第5の視点によるメッセージ中継方法参照)
[第12の形態]
(上記第6の視点によるプログラム参照)
なお、上記第8~第12の形態は、第1の形態と同様に、第2~第7の形態に展開することが可能である。
11、101 受信部
12、102 アンテナ選択部
13、103 送信部
14 第1のアンテナ
15 第2のアンテナ
20 移動体
100 基地局
200、200a、200-1~200-3 車両
210、210a 車載装置
211、211a メッセージ作成部
212 メッセージ送信部
100、100a、100b 基地局
100-E、100-N、100-W、100-S 隣接基地局
104~106 アンテナ
9000 コンピュータ
9010 CPU
9020 通信インターフェース
9030 メモリ
9040 補助記憶装置
Claims (15)
- 第1の方向を指向する第1のアンテナと、
前記第1の方向とは異なる第2の方向を指向する第2のアンテナと、
一の移動体から、配信要求エリア情報を含む他の移動体向けのメッセージを受信可能な受信部と、
前記配信要求エリア情報に示された配信要求エリアと選択するアンテナとの関係を定めた設定情報に基づいて、前記第1のアンテナ及び前記第2のアンテナのいずれかのアンテナを選択するアンテナ選択部と、
前記選択したアンテナを用いて、前記受信部で受信したメッセージを送信する送信部と、
を備えるメッセージ中継装置。 - 前記アンテナ選択部により、前記設定情報によるアンテナの選択が行われない場合、前記メッセージを破棄する請求項1のメッセージ中継装置。
- 前記配信要求エリア情報は、前記メッセージ中継装置の前記第1、第2のアンテナの送信エリアを指定する情報であり、
前記アンテナ選択部は、前記送信エリアに対応するアンテナを選択する請求項1又は2のメッセージ中継装置。 - 前記配信要求エリア情報は、前記移動体の進行方向と前記移動体の位置を基準とする送信要求方向と、を含む情報であり、
前記アンテナ選択部は、前記配信要求エリア情報と、前記メッセージを受信したアンテナとの組み合わせにより送信アンテナを定めた設定情報に基づいて、前記メッセージを送信可能なアンテナの選択を行う請求項1又は2のメッセージ中継装置。 - 前記アンテナ選択部は、
前記第1の方向に位置する移動体が、
前記第1の方向に進み、かつ、前記第2の方向を送信要求方向とするメッセージ、
前記第2の方向に進み、かつ、前記第1の方向を送信要求方向とするメッセージのいずれかの場合に、前記第2のアンテナを選択し、
第2の方向に位置する移動体が、
前記第2の方向に進み、かつ、前記第1の方向を送信要求方向とするメッセージ、
前記第1の方向に進み、かつ、前記第2の方向を送信要求方向とするメッセージのいずれかの場合に、前記第1のアンテナで選択する、
請求項1から4いずれか一のメッセージ中継装置。 - 前記メッセージには、送信要求回数を設定可能であり、
前記送信部は、前記送信要求回数に指定された回数分、前記メッセージの送信を所定の時間間隔で繰り返す請求項1から5いずれか一のメッセージ中継装置。 - 前記メッセージ中継装置は、隣接する隣接メッセージ中継装置と接続されており、
前記配信要求エリア情報によって規定される方向に位置する隣接メッセージ中継装置に対し、前記メッセージの送信を依頼する請求項1から6いずれか一のメッセージ中継装置。 - 第1の方向を指向する第1のアンテナと、
前記第1の方向とは異なる第2の方向を指向する第2のアンテナと、
一の移動体から、配信要求エリア情報を含む他の移動体向けのメッセージを受信可能な受信部と、
前記配信要求エリア情報に示された配信要求エリアと選択するアンテナとの関係を定めた設定情報に基づいて、前記第1のアンテナ及び前記第2のアンテナのいずれかのアンテナを選択するアンテナ選択部と、
前記選択したアンテナを用いて、前記受信部で受信したメッセージを送信する送信部と、
を備えるメッセージ中継装置に対し、
前記配信要求エリア情報を含む他の移動体向けのメッセージを送信する手段を備える車載装置。 - 前記配信要求エリア情報として、前記メッセージ中継装置の前記第1、第2のアンテナの送信エリアを指定する情報を含む他の移動体向けのメッセージを送信可能な請求項8の車載装置。
- 前記配信要求エリア情報として、前記移動体の進行方向と前記移動体の位置を基準とする送信要求方向と、を含む情報を含む他の移動体向けのメッセージを送信可能な請求項8の車載装置。
- 第1の方向を指向する第1のアンテナと、
前記第1の方向とは異なる第2の方向を指向する第2のアンテナと、
一の移動体から、配信要求エリア情報を含む他の移動体向けのメッセージを受信可能な受信部と、
前記配信要求エリア情報に示された配信要求エリアと選択するアンテナの関係を定めた設定情報に基づいて、前記第1のアンテナ及び前記第2のアンテナのいずれかのアンテナを選択するアンテナ選択部と、
前記選択したアンテナを用いて、前記受信部で受信したメッセージを送信する送信部と、
を備えるメッセージ中継装置と、
前記配信要求エリア情報を含む他の移動体向けのメッセージを送信する手段を備える車載装置と、を含む通信システム。 - 第1の方向を指向する第1のアンテナと、
前記第1の方向とは異なる第2の方向を指向する第2のアンテナと、を備えたメッセージ中継装置が、
一の移動体から、配信要求エリア情報を含む他の移動体向けのメッセージを受信し、
前記配信要求エリア情報に示された配信要求エリアと選択するアンテナの関係を定めた設定情報に基づいて、前記第1のアンテナ及び前記第2のアンテナのいずれかのアンテナを選択し、
前記選択したアンテナを用いて、前記受信したメッセージを送信するメッセージ中継方法。 - 第1の方向を指向する第1のアンテナと、
前記第1の方向とは異なる第2の方向を指向する第2のアンテナと、を備えたメッセージ中継装置と接続された車載装置が、
前記メッセージ中継装置に対し、配信要求エリア情報を含む他の移動体向けのメッセージを送信し、
前記メッセージ中継装置に、前記配信要求エリア情報に示された配信要求エリアと選択するアンテナの関係を定めた設定情報に基づいて、前記第1のアンテナ及び前記第2のアンテナのいずれかのアンテナを選択させ、該選択したアンテナを用いて、受信したメッセージを送信させるメッセージ中継方法。 - 第1の方向を指向する第1のアンテナと、
前記第1の方向とは異なる第2の方向を指向する第2のアンテナと、を備えたメッセージ中継装置に搭載されたコンピュータに、
一の移動体から、配信要求エリア情報を含む他の移動体向けのメッセージを受信する処理と、
前記配信要求エリア情報に示された配信要求エリアと選択するアンテナの関係を定めた設定情報に基づいて、前記第1のアンテナ及び前記第2のアンテナのいずれかのアンテナを選択する処理と、
前記選択したアンテナを用いて、前記受信したメッセージを送信する処理と、を実行させるプログラムを記録したプログラム記録媒体。 - 第1の方向を指向する第1のアンテナと、
前記第1の方向とは異なる第2の方向を指向する第2のアンテナと、を備えたメッセージ中継装置と接続された車載装置に搭載されたコンピュータに、
前記メッセージ中継装置に対し、配信要求エリア情報を含む他の移動体向けのメッセージを送信する処理と、
前記メッセージ中継装置に、前記配信要求エリア情報に示された配信要求エリアと選択するアンテナの関係を定めた設定情報に基づいて、前記第1のアンテナ及び前記第2のアンテナのいずれかのアンテナを選択させ、該選択したアンテナを用いて、受信したメッセージを送信させる処理と、
を実行させるプログラムを記録したプログラム記録媒体。
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