JP2004078563A - Communication method between movable bodies - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plurality of masters in one network, and to use one terminal as a master for a plurality of networks at the same time. <P>SOLUTION: When a master terminal 111 registers an optional mobile terminal 112-116 as a member of a virtual logical network A-D, a logical network code of the virtual logical network is assigned to the mobile terminal, data communication in the virtual logical network is managed by the logical network code, and state management of the virtual logical network is carried out by the logical network code. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an inter-mobile communication method, and more particularly to an inter-mobile communication method in which a plurality of masters can exist in one network and one terminal can simultaneously become a master of a plurality of networks.
[0002]
[Prior art]
2. Description of the Related Art With the development of communication technology, communication between mobile bodies such as between vehicles (called vehicle-to-vehicle communication) has become possible. However, in the conventional vehicle-to-vehicle communication, a driver specifies a partner to be connected, connects to the partner via a network, and performs communication.
For this reason, in the conventional vehicle-to-vehicle communication, it was not possible to automatically connect to and communicate with an optimum partner due to a change in the environment or situation of the driver or the vehicle, or at the request of the driver.
[0003]
For example, when the traveling speed decreases, or when you want to reroute, from the preceding vehicle on the same lane or traveling in the direction of rerouting, if it is possible to obtain the position and the vehicle speed of the vehicle, it is convenient to determine the congestion situation ahead, Conventional vehicle-to-vehicle communication could not.
In addition, depending on the driving situation of the own vehicle, there may be times when it is desired to give thanks (at the time of interruption) or caution (at the time of entering a main road or a highway) to a predetermined vehicle in the vicinity. It was not possible with inter-vehicle communication.
The above is an example, but in various other cases, even if it is convenient to be able to connect to and communicate with a predetermined vehicle, conventional vehicle-to-vehicle communication has not been possible.
[0004]
For this reason, the following inter-vehicle communication methods have been proposed. In this communication method, as shown in FIG. 5, (1) information is obtained from other mobile bodies 11 to 16 via the physical network while the car 10 is running or stopped, and (2) obtained. Referring to the information, a mobile that satisfies a predetermined condition is registered as a member of the virtual logical network A corresponding to the condition, and a mobile that satisfies another condition is registered as another virtual logical network B to Register as a member of D. In such a state, (3) when there is a change in the environment and situation of the driver or the vehicle, or when there is a request from the driver, one virtual logical network corresponding to these events is selected from a plurality of virtual logical networks, {Circle around (4)} The selected virtual logical network is set as an actual operation network, and is connected to a predetermined mobile unit constituting the actual operation network to request or notify necessary information.
[0005]
[Problems to be solved by the invention]
In the configuration of FIG. 5, the inter-vehicle communication control device of the own vehicle 10 is a master terminal of a plurality of virtual logical networks A to D. Also, the other vehicles 11 to 16, which are slaves, form a virtual logical network similarly to the own vehicle 10 and become the master terminal, so that one virtual logical network has a plurality of master terminals.
[0006]
However, conventionally, as shown in FIG. 6, only one master can exist in one network, and a plurality of masters cannot exist in one network. Conventionally, as shown in FIG. 7, one terminal cannot be simultaneously the master of a plurality of networks. Conventionally, the logical network disappears when the master terminal disappears, or the logical network cannot survive unless a separate master terminal is generated, and furthermore, any terminal can simultaneously become the master at any time. could not. For this reason, the conventional technology has a problem that the inter-vehicle communication method proposed in FIG. 5 cannot be realized.
As described above, an object of the present invention is to allow a plurality of masters to exist in one network, and to allow one terminal to simultaneously become the master of a plurality of networks.
[0007]
[Means for Solving the Problems]
According to the present invention, a communication control device of an arbitrary vehicle serves as a master terminal, acquires information from another mobile terminal via a physical network, and refers to the obtained information to a mobile terminal satisfying a predetermined condition. A mobile terminal satisfying other conditions is registered as a member of a virtual logical network according to the condition, and a mobile terminal satisfying another condition is registered as a member of the virtual logical network according to the condition. The present invention can be applied to an inter-mobile communication method in which a communication partner is determined by a network member to perform communication. When making a mobile terminal a member of a predetermined virtual logical network, the master terminal, which is a mobile terminal, notifies the mobile terminal of the logical network code of the virtual logical network. Then, by adding the logical network code to the transmission data, data communication within only one virtual logical network becomes possible. Also, by assigning the logical network code to the notification information regarding the status such as acquisition of virtual logical network configuration data or departure from the virtual logical network, status management only within a predetermined virtual logical network can be performed.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
(A) Features of the Network of the Present Invention FIGS. 1 and 2 are explanatory diagrams showing the features of the network of the present invention. As shown in FIG. 1, a feature of the present invention is that two or more masters M1 and M2 can exist in one network NW. In the figure, a large car is a master and a small car is a slave. Another feature of the present invention is that, as shown in FIG. 2, one terminal M3 can simultaneously become a master of many networks NW1 and NW2.
[0009]
(B) Virtual logical network for performing inter-vehicle communication FIG. 3 is an explanatory diagram of a virtual logical network for performing inter-vehicle communication to which the present invention can be applied.
{Circle around (1)} An inter-vehicle communication control device (not shown) of the vehicle of interest 101, while the vehicle is running or stopped, transmits a moving object (vehicle, walking, etc.) via a physical network constituted by physical communication means. ) To obtain necessary information. Here, the physical network is a network in a range where physical communication is possible with peripheral vehicles and pedestrians by the vehicle-to-vehicle communication technology, and as a communication means, a wireless LAN, Bluetooth Bluetooth, and a mobile phone (mobile IP, IPV6, etc.) are considered. Can be The necessary information is information necessary for determining whether or not predetermined conditions described later such as a moving object ID, a driver attribute, an in-vehicle device attribute, and a vehicle position / speed are satisfied.
[0010]
{Circle around (2)} Next, the inter-vehicle communication control device configures one virtual logical network with one or more moving objects satisfying a predetermined condition with reference to the obtained information, and similarly, sets the condition for each other condition. A different virtual logical network is formed by the moving objects that satisfy the conditions. That is, a virtual logical network is formed by generating a member table MBTi (i = 1, 2, 3,...) And a resource table RSTi for each virtual logical network. The member table MBTi indicates the members constituting the virtual logical network, and the resource table RSTi indicates the capability (communication means, input / output means, information to be provided) RM _ij of each member. In the figure, as a virtual logical network,
A: Peripheral vehicle driver network,
B: friend network C: same lane traveling network D: communication navigation user network is shown.
[0011]
The peripheral vehicle driver network A is a virtual logical network including the peripheral vehicle, the peripheral driver, and the pedestrian of the vehicle of interest, and determines whether to belong to this network based on the position information. When forming a group with friends, friends, family, etc. and driving, the friend network B is a virtual logical network in which the vehicles forming the group are members, and determines whether or not to belong to this network based on the driver attribute. decide. The same lane traveling network C is a virtual logical network in which vehicles traveling on the same lane and in the same direction as the vehicle of interest are members, and whether to belong to this network based on the position information of each vehicle and the guidance route of the vehicle of interest. To determine. The communication navigation user network D is a virtual logical network having vehicles that can exchange map data as members, and determines whether or not to belong to this network based on the in-vehicle device attributes.
[0012]
(3) Then, the inter-vehicle communication control device selects a virtual logical network capable of providing necessary information from the plurality of virtual logical networks according to a change in the environment and situation of the driver or the vehicle, or at the request of the driver. The selected virtual logical network is set as an actual operation network, and is connected to a predetermined member (mobile) constituting the actual operation network to request or notify necessary information.
For example, if the inter-vehicle communication control device detects that the speed of the target vehicle has been continuously reduced for a predetermined time or more, the same lane traveling network C is set as the actual operation network. Next, the capability (current position) of the member (vehicle) of the actual operation network is checked, a vehicle ahead or an intermediate vehicle is determined, and a request is made to the vehicle to transmit the vehicle speed. Here, if the sent vehicle speed is lower than the set speed, it can be determined that the vehicle is congested ahead.
[0013]
Alternatively, the vehicle-to-vehicle communication control device sets the peripheral vehicle driver network A to the actual operation network when detecting that the vehicle has entered the main road or the highway. Then, the capability (current position) of the members (vehicles) of the actual operation network is checked, a vehicle behind the own vehicle on the main road or the highway is determined, and a notification that the vehicle is about to enter is sent to the vehicle. Upon receiving the notification of the consent from the vehicle volume, a thank-you message is sent to the vehicle after the entry is completed.
[0014]
(C) Inter-vehicle communication control device FIG. 4 is a block diagram of the inter-vehicle communication control device of the present invention.
The network management unit 51 generates a virtual logical network. That is, an arbitrary mobile unit is registered as a member of the virtual logical network. At this time, a logical network code of the virtual logical network is assigned to the mobile. In addition, the network management unit 51 also holds the logical network code LNCS given when it became a slave, in addition to the logical network code LNCM of the virtual logical network for which it is the master. Then, if the logical network code attached to the transmitted data matches any of the held logical network codes, the data is taken in. If the logical network code does not match any of the logical network codes, the data is discarded.
[0015]
The logical network code units 52 ₁ , 52 ₂ , 52 ₃ ,. . . Are provided corresponding to predetermined logical network codes, respectively, and have the same configuration. Network information managing section 53 of the logical network code unit 52 ₁ stores the network information of the virtual logical network (Figure 1 member table, and resource table). The transmission data handle unit 54 attaches a logical network code to the transmission data created with reference to the network information of the network information management unit 53, and sends the transmission data to the physical network 50 from the network management unit 51. The status data handle unit 55 attaches a logical network code to the created status data and sends the status data to the network 50 from the network management unit 51. Similarly, the other logical network code sections 52 ₂ , 52 ₃ ,. . . Also works.
[0016]
(D) The whole control vehicle-to-vehicle communication periodically (eg, once a second) determines whether there is a vehicle (a vehicle having a vehicle-to-vehicle communication device) that can communicate with the surroundings, and sends a response by transmitting radio waves. wait. The vehicles that have received the radio waves form a network with each other by returning a response to the inquiry. The exchange information needs to include at least an individual ID that can identify the vehicle.
[0017]
When the network is completed, communication between the other vehicle and the own vehicle is performed, and information exchange such as resource database information and vehicle current position information is performed. When making another vehicle a member of a predetermined virtual logical network, the network management unit 51 assigns a logical network code to the other vehicle. The network management unit 51 received resource information, an individual ID and the like, and inputs to the logic network code portion 52 of _the member added the virtual logical network. Thereby, the network information management unit 53 adds a member and a resource to the member table MBTi and the resource table RSTi. Note that the network management unit 51 of the other vehicle holds the logical network code assigned by the master vehicle as the logical network code LNCS of the slave. Hereinafter, similarly, each of the logical network code units 52 ₁ , 52 ₂ , 52 ₃ ,. . . Holds network information of the virtual logical network.
[0018]
In this state, when a change in the environment or situation of the driver or the vehicle or a request from the driver occurs, the logical network code units 52 ₁ , 52 ₂ , 52 ₃ ,. . . The transmission data handle unit 54 attaches a logical network code and a type (separation of transmission data / status data) to transmission data created with reference to the network information, and transmits the transmission data to the network 50 from the network management unit 51. The above is the case of multicasting (broadcasting) in a virtual logical network. If the transmission destination is determined, a destination address (individual ID) is added.
[0019]
In the case of multicast, a mobile having the same logical network code as the logical network code attached to the transmission data captures the transmission data, thereby enabling broadcast communication. In the case of individual communication, a mobile having the same logical network code / address as the logical network code / destination address attached to the transmission data takes in the transmission data.
When the slave terminal departs from the virtual logical network due to a stop or the like, the status data handle unit 55 creates the status data of departure, attaches a logical network code and a type (status) to the data, and sends the data to the network management unit 51. Send it to the network 50. This status data is fetched by the master terminal having the same logical network code. The master terminal deletes the slave from the configuration data of the virtual logical network and also deletes the slave from the network information.
[0020]
Further, in a case where a slave is provided in a predetermined virtual logical network, when data with a logical network code is transmitted from the master, the network management unit 51 of the slave causes the received logical network code to hold the logical logic for the slave. It is determined whether it matches one of the network codes LNCS. If they do not match, the network management unit 51 does not take in the data. If they match, the network management unit 51 inputs the data into the transmission data handle unit 54 of the predetermined logical network code unit indicated by the received and received logical network code.
[0021]
When information is requested from the master, the transmission data handle unit 54 attaches a logical network code and a type (separation of transmission data / status data) to transmission data created by referring to network information, and performs network management. The packet is transmitted from the unit 51 to the network 50.
[0022]
【The invention's effect】
According to the present invention described above, when the master makes an arbitrary mobile unit a member of a predetermined virtual logical network, the master notifies the mobile unit of the logical network code of the virtual logical network and transmits the logical network code to the transmission data. Since it is added, data communication only within one virtual logical network becomes possible.
Further, according to the present invention, the status management of only a predetermined virtual logical network can be performed by adding the logical network code to the notification information regarding the status such as the acquisition of the virtual logical network configuration information and the departure from the virtual logical network. .
[0023]
Further, according to the present invention, since a logical network code for specifying a virtual logical network is added to transmission data and status data, even when a plurality of masters exist in one network, or when one terminal Even if it is the master of the network, data communication can be performed only within one virtual logical network.
[Brief description of the drawings]
FIG. 1 is a first explanatory diagram showing features of a network according to the present invention.
FIG. 2 is a second explanatory diagram showing features of the network of the present invention.
FIG. 3 is an explanatory diagram of a virtual logical network configuration for performing inter-vehicle communication to which the present invention can be applied.
FIG. 4 is a configuration diagram of an inter-vehicle communication control device of the present invention.
FIG. 5 is an explanatory diagram of proposed inter-vehicle communication.
FIG. 6 is a first explanatory diagram showing features of a conventional network.
FIG. 7 is a second explanatory diagram showing features of a conventional network.
[Explanation of symbols]
50 Network 51 Network Management Units 52 ₁ , 52 ₂ Logical Network Code Unit 53 Network Information Management Unit 54 Transmission Data Handle Unit 55 Status Data Handle Unit

Claims (1)

In an inter-mobile communication method for configuring a plurality of virtual logical networks and performing communication between mobiles in the virtual logical network,
The master terminal, which is a mobile terminal, assigns a logical network code of the virtual logical network to the mobile terminal when making any mobile terminal a member of a predetermined virtual logical network,
The logical network code manages data communication in the virtual logical network and performs state management of the virtual logical network.
A communication method between mobile bodies, characterized in that:

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