KR101943225B1 - Method of allocating resource for vehicle-to-vehicle communication - Google Patents

Abstract

In a resource allocation method for V2V (Vehicle-to-Vehicle) communication, a base station acquires traveling route information of each of a plurality of vehicles, a base station receives a V2V connection request signal from a connection request vehicle among a plurality of vehicles, The base station selects a vehicle having the longest traveling route in the future and the connection request vehicle as a connection target vehicle among the plurality of vehicles based on the traveling route information of each of the plurality of vehicles, Assigns a resource block to the pair, and performs V2V communication using the resource block allocated to the connection request vehicle and the connection target vehicle.

Description

[0001] METHOD OF ALLOCATING RESOURCE FOR VEHICLE-TO-VEHICLE COMMUNICATION [0002]

The present invention relates to V2V (Vehicle-to-Vehicle) communication, and more particularly, to a resource allocation method for V2V communication.

Recently, as the demand for vehicle services such as driving safety, infotainment, driving assistance, and automatic driving has increased, much research has been done on V2V (Vehicle-to-Vehicle) .

V2V communication is a technology that enhances the infotainment function of the vehicle and supports the safe driving and autonomous driving of the vehicle by sharing information about the multimedia data or information about the surrounding vehicles and the road environment acquired while the vehicle is traveling with other nearby vehicles.

Generally, in order for a vehicle to perform V2V communication, first, a discovery process is performed to scan whether a vehicle capable of performing V2V communication exists, and a V2V communication is performed around the vehicle through a discovery process If it finds a vehicle that can be carried out, it performs V2V communication with the vehicle.

As described above, since the V2V communication is performed between adjacent vehicles running on the road, when the distance between the vehicles becomes large during the V2V communication between the adjacent vehicles, the V2V communication is disconnected.

However, since vehicles running on the road have different traveling routes, there is a problem that V2V communication has a relatively short network lifetime.

In addition, when the V2V communication that is being performed is disconnected, the vehicle must perform a discovery process for searching whether there is a vehicle capable of performing V2V communication in the vicinity, so that the overhead for V2V communication is relatively .

Korean Patent Publication No. 10-2012-0024230 (March 14, 2012) Korean Patent Publication No. 10-2016-0029323 (2013.03.15) Korean Patent Publication No. 10-2015-0072809 (June 30, 2015)

An object of the present invention is to provide a resource allocation method for V2V (Vehicle-to-Vehicle) communication that can increase network lifetime and reduce communication overhead .

In order to accomplish one object of the present invention, in a resource allocation method for V2V (Vehicle-to-Vehicle) communication according to an embodiment of the present invention, a base station acquires traveling route information of each of a plurality of vehicles , The base station receives a V2V connection request signal from a connection requesting vehicle among the plurality of vehicles, and the base station transmits the V2V connection request signal to the connection request vehicle among the plurality of vehicles based on the traveling route information of each of the plurality of vehicles The vehicle selecting unit selects a vehicle whose traveling path is the longest in the future as a connection target vehicle, and the base station allocates a resource block to the pair of the connection request vehicle and the connection target vehicle, The vehicle performs V2V communication using the allocated resource block.

In one embodiment, the step of the base station acquiring the traveling route information of each of the plurality of vehicles further comprises the steps of: obtaining the traveling route information of the corresponding vehicle from the navigation device included in each of the plurality of vehicles And receiving the data.

In one embodiment, the step of the base station acquiring the traveling route information of each of the plurality of vehicles further comprises the step of acquiring the traveling route information from the navigation server to guide each of the plurality of vehicles to a destination, And receiving the traveling route information of each of the plurality of vehicles.

In one embodiment, the step of the base station acquiring the traveling route information of each of the plurality of vehicles further comprises the steps of: the base station controlling the plurality of vehicles so that the plurality of vehicles move to the self- And receiving the traveling route information of each of the plurality of vehicles from the traveling route information.

In one embodiment, the base station selects, as the connection target vehicle, a vehicle having the longest running route from the connection requesting vehicle among the plurality of vehicles based on the traveling route information of each of the plurality of vehicles Includes the steps of: the base station determining vehicles that are within V2V communicatable distance from the connection request vehicle among the plurality of vehicles as candidate vehicles; and determining, based on the traveling route information of each of the candidate vehicles, And selecting the connection request vehicle as the connection target vehicle among the candidate vehicles, the vehicle having the longest running path in the future.

In this case, the step of the base station selecting, as the connection target vehicle, the vehicle having the longest traveling path with the connection requesting vehicle among the candidate vehicles based on the traveling route information of each of the candidate vehicles, The base station determining branch points existing on a future traveling route of the connection request vehicle as reference bifurcations based on the traveling route information of the connection request vehicle as the reference bifurcations, And selecting a candidate vehicle that includes the largest number of the reference bifurcations consecutively from the current position on the future traveling route as the connection target vehicle among the candidate vehicles based on the candidate vehicle.

In one embodiment, the step of allocating resource blocks to the connection request vehicle and the pair of connection target vehicles by the base station comprises the steps of: allocating resource blocks to the pair of the connection request vehicle and the connection target vehicle, And a resource block having a carrier frequency separated by at least a separation frequency from a carrier frequency of a resource block allocated to the pair of adjacent vehicles to a pair of the connection request vehicle and the connection target vehicle And the like.

In one embodiment, the step of allocating resource blocks to the connection request vehicle and the pair of connection target vehicles by the base station comprises the steps of: allocating resource blocks to the pair of the connection request vehicle and the connection target vehicle, Determining a carrier frequency of a resource block, determining a size of a separation frequency based on a moving direction of the pair of connection request vehicle and the connection target vehicle and a moving direction of the pair of adjacent vehicles, Allocating a resource block having a carrier frequency of a resource block allocated to the pair and a carrier frequency spaced apart from the separation frequency to a pair of the connection request vehicle and the connection target vehicle.

In this case, the step of determining the magnitude of the separation frequency based on the moving direction of the pair of the connection request vehicle and the pair of adjacent vehicles and the moving direction of the pair of the adjacent vehicles may include: Determining the separation frequency as a first frequency when the moving direction of the pair is the same as the moving direction of the pair of adjacent vehicles, and determining the moving direction of the pair of connection request vehicles and the pair of adjacent vehicles And determining the separation frequency as a second frequency larger than the first frequency when the moving directions of the first and second frequency bands are opposite to each other.

In one embodiment, the base station selects a vehicle that is within the V2V communication range for each of the plurality of vehicles on the basis of the traveling route information of each of the plurality of vehicles and matches the longest traveling route in the future, And connecting them to each other as a pair.

In this case, the step of the base station selecting, as the connection target vehicle, the vehicle whose traveling path is the longest in the future with the connection request vehicle among the plurality of vehicles based on the traveling route information of each of the plurality of vehicles And determining that the connection target vehicle is a vehicle in which the base station is connected to the connection request vehicle among the plurality of vehicles by the candidate pair.

The resource allocation method for V2V (Vehicle-to-Vehicle) communication according to the embodiments of the present invention can effectively increase the network lifetime of the V2V communication.

In addition, the resource allocation method for V2V communication according to the embodiments of the present invention can effectively reduce the overhead for V2V communication.

In addition, the resource allocation method for V2V communication according to the embodiments of the present invention can effectively prevent inter-carrier interference (ICI) that may occur in V2V communication.

1 is a flowchart illustrating a resource allocation method for V2V (Vehicle-to-Vehicle) communication according to an embodiment of the present invention.
2 to 4 are diagrams illustrating V2V communication systems according to embodiments of the present invention.
5 shows an example of a step in which the base station of FIG. 1 selects, as a connection target vehicle, a vehicle whose connection route is the longest in the future traveling route and a connection request vehicle among a plurality of vehicles based on the traveling route information of each of the plurality of vehicles Fig.
FIG. 6 is a flowchart illustrating a process of selecting, as a connection target vehicle, a vehicle whose connection route is the longest in the future and the connection request vehicle among the plurality of vehicles based on the traveling route information of each of the plurality of vehicles, FIG.
FIG. 7 is a flowchart showing an example of a step of selecting, as a connection target vehicle, a vehicle whose connection route is the longest in the future traveling route and the connection request vehicle among the candidate vehicles based on the traveling route information of each of the candidate vehicles in FIG. to be.
8 is a view for explaining a process in which the base station of FIG. 7 selects a connection request vehicle among the candidate vehicles based on the traveling route information of each of the candidate vehicles and a vehicle whose longest traveling route matches the longest traveling route as the connection target vehicle .
9 is a flowchart showing an example of a step in which the base station of FIG. 1 allocates a resource block to a pair of a connection request vehicle and a connection target vehicle.
10 is a flowchart showing another example of a step in which the base station of FIG. 1 allocates a resource block to a pair of a connection request vehicle and a connection target vehicle.
11 and 12 are diagrams for explaining a process in which a base station determines a size of a separation frequency based on a movement direction of a pair of a connection request vehicle and a connection target vehicle and a movement direction of a pair of adjacent vehicles.
13 is a flowchart illustrating a resource allocation method for V2V communication according to another embodiment of the present invention.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

The present invention is capable of various modifications and various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms may be used for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprise", "having", and the like are intended to specify the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, , Steps, operations, components, parts, or combinations thereof, as a matter of principle.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be construed as meaning consistent with meaning in the context of the relevant art and are not to be construed as ideal or overly formal in meaning unless expressly defined in the present application .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is a flowchart illustrating a resource allocation method for V2V (Vehicle-to-Vehicle) communication according to an embodiment of the present invention.

2 to 4 are diagrams illustrating V2V communication systems according to embodiments of the present invention.

The resource allocation method for V2V communication shown in FIG. 1 may be performed through one of the V2V communication systems 10a, 10b, and 10c of FIGS.

Hereinafter, a resource allocation method for V2V communication according to embodiments of the present invention will be described with reference to FIGS.

1, the base station 100 acquires travel route information (DPI) of each of a plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 running on a road (Step S100).

The travel route information DPI of each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 may indicate the travel route of the corresponding vehicle from the current position to the future.

2, the V2V communication system 10a includes a base station 100 and a plurality of vehicles 200-1, 200-2, 200-3, 200-4, 200-5 ).

Each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 performs communication with the base station 100 based on a wireless communication standard such as LTE (Long Term Evolution) communication can do.

In addition, each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 guides the driver to a traveling route from the current position to the destination when the destination is input And a navigation device.

In this case, the base station 100 transmits the corresponding travel route information (DPI) of the vehicle from the navigation device included in each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, Can be received.

3, the V2V communication system 10b includes a base station 100, a plurality of vehicles 200-1, 200-2, 200-3, 200-4, 200-5 And a navigation server 300. The navigation server 300 includes a navigation server 300,

Each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 includes a base station 100 and a navigation server (not shown) based on wireless communication standards such as Long Term Evolution 300).

Each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 can transmit a destination to the navigation server 300. [ When the navigation server 300 receives the destination from each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5, It is possible to determine the route and provide the traveling route to the corresponding vehicle. Accordingly, the driver of each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 operates the corresponding vehicle in accordance with the traveling route provided from the navigation server 300, You can easily reach your destination.

In this case, the base station 100 receives the travel route information DPI of each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 from the navigation server 300 .

4, the V2V communication system 10c includes a base station 100, a plurality of vehicles 200-1, 200-2, 200-3, 200-4, 200- 5, and an automatic driving server 400.

Each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 is connected to the base station 100 and the autonomous mobile server 200-3 based on wireless communication standards such as Long Term Evolution (LTE) Lt; RTI ID = 0.0 > 400 < / RTI >

Each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 operates in an autonomous mode in which the vehicle can move under the control of the autonomous server 400 without intervention of the driver .

In the autonomous mode, each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 may transmit a destination to the autonomous mobile server 400. [ When the autonomous mobile server 400 receives the destination from each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5, It is possible to determine the traveling route and control the corresponding vehicle so that the corresponding vehicle moves along the traveling route. Therefore, in the autonomous mode, each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 can move along the traveling path under the control of the autonomous traveling server 400 .

In this case, the base station 100 receives the travel route information DPI of each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 from the autonomous travel server 400 can do.

On the other hand, in FIGS. 2 to 4, the V2V communication systems 10a, 10b and 10c have five vehicles 200-1, 200-2, 200-3, 200-4 and 200 -5), but the present invention is not limited thereto. Depending on the embodiment, the V2V communication systems 10a, 10b, 10c may include any number of vehicles running on the road having a plurality of bifurcation points.

Referring again to FIG. 1, a connection request vehicle for performing V2V communication among a plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 is connected to the base station 100 via a V2V connection The request signal can be transmitted (step S200).

When the base station 100 receives the V2V connection request signal from the connection request vehicle among the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 (step S200) Based on the travel route information DPI of each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5, a plurality of vehicles 200-1, 200-2, 200 -3, 200-4, and 200-5 from the current location and the connection request vehicle, the vehicle with the longest traveling route may be selected as the connection target vehicle (step S300).

FIG. 5 is a flowchart illustrating a process of selecting, as a connection target vehicle, a connection request vehicle and a vehicle whose traveling path is the longest among the plurality of vehicles based on the traveling route information of each of the plurality of vehicles, Fig.

FIG. 6 is a flowchart illustrating a process of selecting, as a connection target vehicle, a vehicle whose connection route is the longest in the future and the connection request vehicle among the plurality of vehicles based on the traveling route information of each of the plurality of vehicles, FIG.

5 and 6, the base station 100 receives the V2V connection request signal from the connection request vehicle among the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 (Step S200), the vehicles within the V2V communication distance from the connection request vehicle among the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 are selected as candidate vehicles (Step S310).

For example, if the first vehicle 200-1 among the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 corresponds to the connection request vehicle and the base station 100 200-2, 200-3, 200-4, and 200-5 at the time of receiving the V2V connection request signal from the connection request vehicle 200-1, 4, the base station 100 selects one of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 as the connection request vehicle 200-1 200-2 within the V2V communication range with the connection request vehicle 200-1, except for the fourth vehicle 200-4 and the fifth vehicle 200-5, which are outside the V2V communication range, And the third vehicle 200-3 as the candidate cars 200-2 and 200-3.

Then, the base station 100 determines, based on the traveling route information DPI of each of the candidate vehicles, a vehicle having the longest running route from the current position to the connection requesting vehicle among the candidate vehicles as the connection target vehicle (Step S320).

For example, as shown in FIG. 6, on the basis of the traveling route information DPI of the connection request vehicle 200-1, the connection request vehicle 200-1, The candidate vehicle 200-2 is judged to be traveling along the road and the candidate vehicle 200-2 travels along the upper road passing the future point IS from the present position on the basis of the traveling route information DPI of the candidate vehicle 200-2 And it is determined that the candidate vehicle 200-3 will travel along the lower road from the present position past the fork point IS on the basis of the traveling route information DPI of the candidate vehicle 200-3, The second vehicle 200-2 among the candidate vehicles 200-2 and 200-3 has the longest running route with the connection request vehicle 200-1 for the longest time, -2) can be selected as the connection target vehicle.

7 is a flowchart illustrating an example of a step S320 of selecting, as a connection target vehicle, a vehicle whose connection route is the longest in the future and the connection request vehicle among the candidate vehicles based on the travel route information of each of the candidate vehicles in FIG. Fig.

8 is a view for explaining a process in which the base station of FIG. 7 selects a connection request vehicle among the candidate vehicles based on the traveling route information of each of the candidate vehicles and a vehicle whose longest traveling route matches the longest traveling route as the connection target vehicle .

Referring to FIGS. 7 and 8, the base station 100 can determine the bifurcations existing on the future traveling route of the connection request vehicle as reference bifurcations based on the traveling route information (DPI) of the connection request vehicle (step S321 ).

8, among the plurality of bifurcation points IS existing on the road based on the traveling route information DPI of the connection request vehicle 200-1, the connection request vehicle 200-1 (R_IS1, R_IS2, R_IS3, R_IS4, R_IS5, and R_IS6) existing on the future traveling route of the vehicle.

Thereafter, the base station 100 transmits a candidate vehicle, which includes the largest number of the reference bifurcations consecutively from the current position, on the future traveling route among the candidate vehicles based on the traveling route information DPI of each of the candidate vehicles, It is possible to select the target vehicle (step S323).

For example, as shown in Fig. 8, based on the traveling route information DPI of the candidate vehicle 200-2, the candidate vehicle 200-2 selects the future bifurcations R_IS1, R_IS2, R_IS3, R_IS6), the candidate vehicle 200-2 may successively include three reference bifurcations R_IS1, R_IS2, and R_IS3 from the current position on the future traveling route.

On the other hand, the candidate vehicle 200-3 sequentially passes future bifurcations R_IS1, IS1, R_IS3, R_IS4, R_IS5, R_IS6 from the current position on the basis of the traveling route information DPI of the candidate vehicle 200-3 The candidate vehicle 200-3 may successively include one reference point R_IS1 from the current position on the future traveling route.

Therefore, the second vehicle 200-2 among the candidate vehicles 200-2 and 200-3 can continuously transmit the reference bifurcations R_IS1, R_IS2, R_IS3, R_IS4, R_IS5, and R_IS6 on the traveling route from the current position continuously The base station 100 can select the second vehicle 200-2 as the connection target vehicle.

Referring again to FIG. 1, after the base station 100 selects the connection target vehicle (step S300), a resource block may be allocated to the pair of the connection request vehicle and the connection target vehicle (step S400 ).

The resource blocks allocated to the pair of the connection request vehicle and the connection target vehicle may include a carrier frequency used for the pair of connection request vehicle and the connection target vehicle to perform V2V communication.

9 is a flowchart showing an example of a step S400 of allocating a resource block to a connection request vehicle and a connection target vehicle in the base station of FIG.

Wherein the control unit determines whether or not a carrier frequency of a resource block allocated to a pair of the connection request vehicle and the connection target vehicle matches a carrier frequency of a resource block allocated to a pair of adjacent vehicles adjacent to the pair of connection request vehicles If the difference is small, inter-carrier interference (ICI) may occur in the V2V communication between the connection request vehicle and the connection target vehicle.

9, the base station 100 determines a carrier frequency of a resource block allocated to a pair of adjacent vehicles adjacent to a pair of the connection request vehicle and the connection target vehicle (step S410) A resource block having a carrier frequency that is separated from the carrier frequency of the resource block allocated to the pair of the connection request vehicle and the separation target frequency can be allocated to the pair of the connection request vehicle and the connection target vehicle at step S420.

In one embodiment, the size of the separation frequency may be predetermined and stored in the base station 100.

Therefore, the resource allocation method for the V2V communication according to the embodiments of the present invention can effectively prevent the carrier-to-carrier interference in the V2V communication between the connection request vehicle and the connection target vehicle.

10 is a flowchart showing another example of the step S400 of allocating a resource block to a connection request vehicle and a connection target vehicle in the base station of FIG.

Generally, vehicles traveling on the road move at a high speed, so that a frequency transition may occur in signals transmitted and received for V2V communication between vehicles due to the Doppler effect. At this time, the frequency shift relatively increases as the relative speed between the vehicles increases, and the frequency shift also decreases as the relative speed between the vehicles becomes relatively small.

As shown in FIG. 10, the base station 100 can grasp a carrier frequency of a resource block allocated to a pair of adjacent vehicles adjacent to a pair of the connection request vehicle and the connection target vehicle (step S410).

In addition, the base station 100 may determine the size of the separation frequency based on the movement direction of the pair of the connection request vehicle and the connection target vehicle and the movement direction of the pair of adjacent vehicles (step S415).

11 and 12 are diagrams for explaining a process in which a base station determines a size of a separation frequency based on a movement direction of a pair of a connection request vehicle and a connection target vehicle and a movement direction of a pair of adjacent vehicles.

11, when the moving directions of the pairs of the connection request vehicle 200-1 and the connection target vehicle 200-2 and the moving directions of the pairs of the adjacent vehicles 200-6 and 200-7 are the same The relative speed between the pair of the connection request vehicle 200-1 and the connection target vehicle 200-2 and the pair of the adjacent vehicles 200-6 and 200-7 may be relatively low.

Therefore, a frequency transition of a signal transmitted and received for V2V communication between the connection request vehicle 200-1 and the connection target vehicle 200-2 and transmission and reception for V2V communication between the adjacent vehicles 200-6 and 200-7 The frequency shift of the signal to be generated can be relatively small.

In this case, the base station 100 may determine the separation frequency to be a relatively small first frequency.

12, the moving direction of the pair of connection request vehicle 200-1 and the connection target vehicle 200-2 and the moving direction of the pair of adjacent vehicles 200-8 and 200-9 The relative speed between the pair of the connection request vehicle 200-1 and the connection target vehicle 200-2 and the pair of the adjacent vehicles 200-6 and 200-7 may be relatively high.

Therefore, a frequency transition of a signal transmitted / received for V2V communication between the connection request vehicle 200-1 and the connection target vehicle 200-2 and transmission / reception for V2V communication between adjacent vehicles 200-8 and 200-9 The frequency shift of the signal to be generated can be relatively large.

In this case, the base station 100 may determine the separation frequency as a second frequency greater than the first frequency.

In one embodiment, the magnitude of the first frequency and the magnitude of the second frequency may be predetermined and stored in the base station 100.

10, the base station 100 determines the size of the separation frequency based on the movement direction of the pair of connection request vehicles and the pair of adjacent vehicles and the movement direction of the pair of adjacent vehicles (step S415) A resource block having a carrier frequency of a resource block allocated to the pair of adjacent vehicles and a carrier frequency spaced apart from the separation frequency may be allocated to the connection request vehicle and the pair of connection target vehicles in operation S420.

Therefore, the resource allocation method for V2V communication according to the embodiments of the present invention can efficiently use the frequency resource while effectively preventing carrier interference from occurring in the V2V communication between the connection request vehicle and the connection target vehicle .

Referring back to FIG. 1, the connection request vehicle and the connection target vehicle can perform V2V communication using the allocated resource block (step S500).

Generally, in order for a vehicle to perform V2V communication, first, a discovery process is performed to scan whether a vehicle capable of performing V2V communication exists, and a V2V communication is performed around the vehicle through a discovery process If it finds a vehicle that can be carried out, it performs V2V communication with the vehicle.

As described above, since the V2V communication is performed between adjacent vehicles running on the road, if the distance between the vehicles becomes large during the V2V communication between the adjacent vehicles, the V2V communication can be disconnected.

However, since vehicles running on the road have different traveling routes, there is a problem that V2V communication has a relatively short network lifetime, and when the V2V communication which is being performed is disconnected, There is a problem that the overhead for V2V communication is relatively large since the discovery process for searching whether there is a vehicle capable of performing communication is performed again.

On the other hand, according to the resource allocation method for V2V communication according to the embodiments of the present invention, as described above with reference to FIGS. 1 to 12, the base station 100 includes a plurality of vehicles 200-1 200-2, 200-3, 200-3, 200-4, and 200-5 so that the base station 100 can acquire the traveling route information DPI of each of the plurality of vehicles 200-1, 200-2, 200- 200-2, 200-3, 200-4, and 200-5, when receiving the V2V connection request signal from the connection request vehicle in the plurality of vehicles 200-1, 200-2, 200-3, 200-4, 200-2, 200-3, 200-4, and 200-5 based on the travel route information DPI of the connection request vehicle and the current position from the current position of the connection request vehicle among the plurality of vehicles 200-1, 200-2, 200-3, 200-4, A matching vehicle may be selected as a connection target vehicle and a resource block may be allocated to a pair of the connection request vehicle and the connection target vehicle.

Therefore, the resource allocation method for V2V communication according to the embodiments of the present invention can effectively increase the network lifetime of the V2V communication.

In addition, when each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 transmits the V2V connection request signal to the base station 100, Each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 performs a discovery process to search for a target vehicle to perform V2V communication You do not need to do it. Therefore, the resource allocation method for V2V communication according to the embodiments of the present invention can effectively reduce the overhead for V2V communication.

In addition, even when the vehicles are traveling along different routes during the V2V communication between the vehicles, and the V2V communication that is being performed is disconnected, when the corresponding vehicle transmits the V2V connection request signal to the base station 100 , The base station 100 can quickly reselect the connection target vehicle based on the traveling route information DPI of each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 .

For example, as described above with reference to FIG. 8, when the base station 100 selects the second vehicle 200-2 as the connection target vehicle for the connection request vehicle 200-1, the connection request vehicle 200- 1 and the connection target vehicle 200-2 can perform V2V communication from the first reference branch point R_IS1 to the third reference branch point R_IS3.

However, the connection request vehicle 200-1 moves toward the fourth reference branch point R_IS4 after passing through the third reference branch point R_IS3, whereas the connection target vehicle 200-2 moves to the third reference branch point Since the V2V communication between the connection request vehicle 200-1 and the connection target vehicle 200-2 is performed after passing through the third reference junction R_IS3, It can be disconnected later.

In this case, the connection request vehicle 200-1 may retransmit the V2V connection request signal to the base station 100, and the base station 100 may transmit the V2V connection request signal to the third vehicle 200-3 after the third reference point R_IS3, The third vehicle 200-3 can be quickly determined as the connection target vehicle because the future running route of the connection request vehicle 200-1 corresponds to the longest traveling route of the connection request vehicle 200-1. Therefore, the connection request vehicle 200-1 and the connection target vehicle 200-3 can perform V2V communication from the third reference point R_IS3 to the sixth reference point R_IS6.

In this way, even if the vehicles travel along different paths during V2V communication between the vehicles, and the V2V communication being performed is disconnected, the corresponding vehicle transmits the V2V connection request signal to the base station 100 The base station 100 can quickly determine the connection target vehicle based on the traveling route information DPI of each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 The resource allocation method for V2V communication according to the embodiments of the present invention can effectively improve the efficiency of V2V communication.

13 is a flowchart illustrating a resource allocation method for V2V communication according to another embodiment of the present invention.

The resource allocation method for V2V communication shown in FIG. 13 may further include a step S150 in the resource allocation method for V2V communication shown in FIG.

Therefore, a description overlapping with those described above with reference to FIGS. 1 to 12 will be omitted, and only differences from the resource allocation method for V2V communication shown in FIG. 1 will be described below.

13, the base station 100 acquires travel route information DPI of each of a plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 running on the road 200-2, 200-3, 200-4, 200-2, 200-3, 200-4, 200-2, 200-3, 200-3, 200-3, 200-3, and 200-4 after receiving the V2V connection request signal from the connection request vehicle (step S100) 5-2) within the V2V communication range for each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 based on the respective travel route information DPI, The vehicle having the longest matching time can be selected and connected to each other in advance as a candidate pair (step S150).

In this case, when the base station 100 receives the V2V connection request signal from the connection request vehicle among the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 S200), and a vehicle connected to the connection request vehicle among the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 as the candidate pair can be determined as the connection target vehicle.

According to the resource allocation method for V2V communication shown in FIG. 13, when the base station 100 receives the V2V connection from each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 If the V2V connection request signal is received from each of the plurality of vehicles 200-1, 200-2, 200-3, 200-4, and 200-5 before receiving the request signal, The base station 100 can more quickly determine the connection target vehicle in response to the V2V connection request signal by preliminarily selecting the vehicle and connecting it as the candidate pair in advance.

Therefore, the resource allocation method for V2V communication according to the embodiments of the present invention can improve the efficiency of V2V communication more effectively.

The present invention can be usefully used to improve the efficiency of V2V (Vehicle-to-Vehicle) communication.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. It will be understood that the invention may be modified and varied without departing from the scope of the invention.

10a, 10b, 10c: V2V (Vehicle-to-Vehicle) communication system
100: base station
200-1 to 200-9: vehicle
300: Navigation server
400: autonomous drive server

Claims (11)

The base station obtaining travel route information of each of the plurality of vehicles;
Receiving a V2V (Vehicle-to-Vehicle) connection request signal from the connection requesting vehicle among the plurality of vehicles;
Selecting, by the base station, as a connection target vehicle, a vehicle whose longest traveling route matches the connection requesting vehicle among the plurality of vehicles based on the traveling route information of each of the plurality of vehicles;
Allocating a resource block to the connection request vehicle and the pair of connection target vehicles; And
Wherein the connection request vehicle and the connection target vehicle perform V2V communication using the allocated resource block,
Wherein the step of allocating resource blocks to the connection request vehicle and the pair of connection target vehicles comprises:
Determining a carrier frequency of a resource block allocated to a pair of adjacent vehicles adjacent to the pair of the connection request vehicle and the connection target vehicle;
Determining a magnitude of the separation frequency based on a moving direction of the pair of connection request vehicles and the pair of adjacent vehicles and a moving direction of the pair of adjacent vehicles; And
Allocating a resource block having a carrier frequency of a resource block allocated to the pair of adjacent vehicles and a carrier frequency separated by more than the separation frequency to a pair of the connection request vehicle and the connection target vehicle, Resource allocation method. The method as claimed in claim 1, wherein the step of the base station acquiring the traveling route information of each of the plurality of vehicles comprises:
And the base station receiving the travel route information of the corresponding vehicle from a navigation device included in each of the plurality of vehicles. The method as claimed in claim 1, wherein the step of the base station acquiring the traveling route information of each of the plurality of vehicles comprises:
And the base station receiving the travel route information of each of the plurality of vehicles from a navigation server that guides a route for each of the plurality of vehicles to reach a destination. The method as claimed in claim 1, wherein the step of the base station acquiring the traveling route information of each of the plurality of vehicles comprises:
And the base station receiving the traveling route information of each of the plurality of vehicles from an autonomous traveling server that controls the plurality of vehicles so that the plurality of vehicles move to the autonomous traveling mode, . The method according to claim 1, wherein the base station selects, as the connection target vehicle, a vehicle whose traveling path is the longest among the plurality of vehicles based on the traveling route information of each of the plurality of vehicles, Lt; / RTI >
Determining, by the base station, among the plurality of vehicles, vehicles within a V2V communication distance from the connection request vehicle as candidate vehicles; And
The base station selecting V2V communication as the connection target vehicle, the vehicle having the longest traveling path of the connection requesting vehicle among the candidate vehicles, based on the traveling route information of each of the candidate vehicles, Resource allocation method. The method as claimed in claim 5, wherein the base station selects, as the connection target vehicle, a vehicle having the longest traveling path from the connection requesting vehicle among the candidate vehicles based on the traveling route information of each of the candidate vehicles Quot;
Determining, as reference bifurcations, bifurcations existing on a future traveling route of the connection request vehicle based on the traveling route information of the connection request vehicle; And
The base station selects a candidate vehicle that includes the largest number of the reference bifurcations consecutively from the current position on the future traveling route among the candidate vehicles based on the traveling route information of each of the candidate vehicles as the connection target vehicle / RTI > for a V2V communication. delete delete The method as claimed in claim 1, wherein the step of determining the magnitude of the separation frequency based on the movement direction of the pair of the connection request vehicle and the connection target vehicle and the movement direction of the pair of adjacent vehicles comprises:
Determining the separation frequency as a first frequency when the moving direction of the pair of the connection request vehicle and the pair of adjacent vehicles is the same as the moving direction of the pair of adjacent vehicles; And
Determining the separation frequency as a second frequency greater than the first frequency when the movement direction of the pair of connection request vehicles and the pair of adjacent vehicles is opposite to the movement direction of the pair of adjacent vehicles, Resource allocation method for communication. The method according to claim 1,
Selecting a vehicle whose traveling path is the longest in a future V2V communication range for each of the plurality of vehicles based on the traveling route information of each of the plurality of vehicles, and connecting the selected vehicles to each other as candidate pairs Further comprising the steps of: 11. The method according to claim 10, wherein the base station selects, as the connection target vehicle, a vehicle whose traveling path is the longest in the future from the connection request vehicle among the plurality of vehicles based on the traveling route information of each of the plurality of vehicles Lt; / RTI >
And determining that the connection target vehicle is a vehicle connected to the connection request vehicle among the plurality of vehicles by the base station.

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