CN106415689B - Pedestrian detection - Google Patents
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- CN106415689B CN106415689B CN201480076930.3A CN201480076930A CN106415689B CN 106415689 B CN106415689 B CN 106415689B CN 201480076930 A CN201480076930 A CN 201480076930A CN 106415689 B CN106415689 B CN 106415689B
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Abstract
Location information communication method, vehicular communication unit and pedestrian's device based on Wi-Fi are provided.One of the method includes: that the communication device being mounted on the first vehicle determines whether that the location information that the second vehicle is received in the first predetermined amount of time, second vehicle are shorter than the first preset distance at a distance from first vehicle；And if not, broadcasting the location information of first vehicle in the one 802.11 management frame.By using the method, pedestrian detection rate can be improved and can reduce wireless channel congestion.
Description
Technical field
The present invention relates generally to pedestrian detections.
Background technique
Currently, pedestrian detection method occurs in driving assistance system to improve driving safety.In some solutions
In scheme, to detect pedestrian, vehicle obtains the location information of pedestrian by Wi-Fi direct.In Wi-Fi direct method, it is
The location information for obtaining pedestrian, the electronic device being installed on vehicle need to establish Wi-Fi with the electronic device carried by pedestrian
Connection.If all electronic devices carried from pedestrian send its location information to vehicle, radio communication channel may be congestion
's.Accordingly, there exist the needs to new pedestrian detection method, to improve detection rates and to mitigate wireless channel congestion.
Summary of the invention
In one embodiment, a kind of location information communication method based on Wi-Fi is provided.The described method includes: peace
Communication device on the first vehicle determines whether the location information that the second vehicle is received in the first predetermined amount of time, institute
It is shorter than the first preset distance at a distance from first vehicle to state the second vehicle；And if not, in the one 802.11 management frame
The location information of the first vehicle of middle broadcast.
In some embodiments, above method can be repeatedly executed.
In some embodiments, the location information communication method may further include: receives from first pedestrian's device
To after the location information of first pedestrian's device, institute's rheme of the first pedestrian device is broadcasted in the 2nd 802.11 management frame
Confidence breath.
In some embodiments, the location information communication method may further include: from the first pedestrian device
After the location information for receiving the first pedestrian device, second time period is set；Determine whether in the second time period
In the location information of second pedestrian's device is received from other vehicles, wherein the second pedestrian device and first pedestrian fill
It the distance between sets shorter than the second preset distance；And if not, described first is broadcasted in the 2nd 802.11 management frame
The location information of pedestrian's device.
In some embodiments, the one 802.11 management frame or the 2nd 802.11 management frame can be beacon
Frame.In some embodiments, the location information of first vehicle can carry basic service set identifier within a beacon frame
(Basic Service Set Identifier, BSSID) field or service set identifier (Service Set
Identifier, SSID) in field.In some embodiments, the received location information of institute of the first pedestrian device can
In the BSSID field or ssid field of carrying within a beacon frame.
In some embodiments, the one 802.11 management frame or the 2nd 802.11 management frame can be other
The frame of type, such as probing response frame, auth response frame and association response frame.
In some embodiments, first preset distance or second preset distance can be 20 meters.
In some embodiments, the location information of first vehicle can be from the positioning being mounted on first vehicle
Device, such as global positioning system (global positioning system, GPS) device obtains.
In some embodiments, the location information communication method may further include: is receiving first pedestrian
After one location information in device and the second pedestrian device, it is based on the first pedestrian device and second row
One and the first vehicle location information in people's device is calculated in the first pedestrian device and second pedestrian
The distance between one and first vehicle in device；And if distance calculated is shorter than preset distance, report is generated
It is alert.
In some embodiments, the preset distance can be 10 meters.
In one embodiment, a kind of location information communication method based on Wi-Fi is provided.The described method includes:
After the location information that first pedestrian's device receives the first pedestrian device, the communication device that is mounted on the first vehicle
The location information of the first pedestrian device is broadcasted in the one 802.11 management frame.
In some embodiments, the location information communication method may further include: from the first pedestrian device
After the location information for receiving the first pedestrian device, first time period is set；Determine whether at described first
Between Duan Zhongcong other vehicles receive the location information of second pedestrian's device, wherein the second pedestrian device and the first row
The distance between people's device is shorter than the first preset distance；And if not, described first is broadcasted in the one 802.11 management frame
The location information of pedestrian's device.
In some embodiments, the location information communication method may further include: determines whether in the second pre- timing
Between the location information of the second vehicle, second vehicle, second preset distance of ratio at a distance from first vehicle are received in section
It is short；And if not, the location information of first vehicle is broadcasted in the 2nd 802.11 management frame.
In some embodiments, the one 802.11 management frame or the 2nd 802.11 management frame can be beacon
Frame.In some embodiments, the first pedestrian device received location information can be carried on the BSSID word of beacon frame
In section or ssid field.In some embodiments, the location information of first vehicle can be carried on the BSSID word of beacon frame
In section or ssid field.
In some embodiments, the one 802.11 management frame or the 2nd 802.11 management frame can be other
The frame of type, such as probing response frame, auth response frame and association response frame.
In some embodiments, first preset distance or second preset distance can be 20 meters.
In some embodiments, the location information of first vehicle can be from the positioning device being mounted on the first vehicle
(such as GPS device) obtains.
In some embodiments, the location information communication method may further include: is receiving first pedestrian
After one location information in device and the second pedestrian device, it is based on the first pedestrian device and second row
One and the first vehicle location information in people's device is calculated in the first pedestrian device and second pedestrian
The distance between one and described first vehicle in device；And if distance calculated is shorter than preset distance, produce
Raw alarm.
In some embodiments, the preset distance can be 10 meters.
In one embodiment, a kind of location information communication method based on Wi-Fi is provided.The method can include:
First pedestrian's device broadcasts its location information in 802.11 management frames.
In some embodiments, the location information communication method may further include: determines whether to connect from the first vehicle
The location information of second pedestrian's device is received, the second pedestrian device compares preset distance at a distance from the first pedestrian device
It is short；And if not, the location information of first pedestrian's device is broadcasted in 802.11 management frames.
In some embodiments, the first pedestrian device can be periodically or in the position for receiving the second vehicle
The location information of the first pedestrian device is broadcasted after information.
In some embodiments, 802.11 management frame can be probe request.The position of first pedestrian's device
Information can be carried in the ssid field or BSSID field of probe request.
In some embodiments, 802.11 management frame can be other kinds of frame, such as checking request frame and
Association request frame.
In some embodiments, the preset distance can be 20 meters.
In some embodiments, the location information of the first pedestrian device can be from being mounted on the first pedestrian device
On positioning device (such as GPS device) obtain.
In one embodiment, a kind of communication system being mounted on the first vehicle is provided.The communication system can wrap
Receiver, transmitter and processing unit are included, the processing unit is configured for: determining receiver whether in the first predetermined time
The location information of the second vehicle, second vehicle, first preset distance of ratio at a distance from first vehicle are received in section
It is short；And if not, control the location information that the transmitter broadcasts first vehicle in the one 802.11 management frame.
In some embodiments, the processing unit may be additionally configured to repeat above procedure.
In some embodiments, the processing unit may be additionally configured to: in receiver from first pedestrian
After device receives the location information of the first pedestrian device, control transmitter broadcasts institute in the 2nd 802.11 management frame
State the location information of first pedestrian's device.
In some embodiments, the processing unit may be additionally configured to: in receiver from first pedestrian
After device receives the location information of the first pedestrian device, second time period is set；Determine the receiver whether
The location information of second pedestrian's device is received in second time period from other vehicles, wherein the second pedestrian device with it is described
The distance between first pedestrian's device is shorter than the second preset distance；And if not, control transmitter is managed the 2nd 802.11
The location information of the first pedestrian device is broadcasted in frame.
In some embodiments, the one 802.11 management frame or the 2nd 802.11 management frame can be beacon
Frame.In some embodiments, the processing unit may be additionally configured to add the location information of first vehicle
Into the BSSID field or ssid field of beacon frame.In some embodiments, the processing unit may be additionally configured to
The location information of the first pedestrian device is added in the BSSID field or ssid field of beacon frame.
In some embodiments, the one 802.11 management frame or the 2nd 802.11 management frame can be other
The frame of type, such as probing response frame, auth response frame and association response frame.
In some embodiments, first preset distance or second preset distance can be 20 meters.
In some embodiments, the communication device may further include output device.The processing unit may go back quilt
It is configured to: believing in one position that the receiver receives in the first pedestrian device and the second pedestrian device
After breath, the position based on one and described first vehicle in the first pedestrian device and the second pedestrian device
Confidence breath, calculates one between first vehicle in the first pedestrian device and the second pedestrian device
Distance；And if distance calculated is shorter than preset distance, control output device generates alarm.
In some embodiments, the preset distance can be 10 meters.
In some embodiments, the communication system may further include the position for being configured for obtaining first vehicle
The positioning device (such as GPS device) of confidence breath.
In one embodiment, a kind of communication system being mounted on the first vehicle is provided.The communication system can wrap
Receiver, transmitter and processing unit are included, the processing unit is configured for: being received in receiver from first pedestrian's device
After the location information of the first pedestrian device, controls the transmitter and broadcast described first in the one 802.11 management frame
The location information of pedestrian's device.
In some embodiments, the processing unit may be additionally configured to: in the receiver from described first
After pedestrian's device receives the location information of the first pedestrian device, first time period is set；Determining the receiver is
The no location information for receiving second pedestrian's device from other vehicles in the first time period, wherein second pedestrian fills
It is shorter than the first preset distance to set the distance between described first pedestrian device；And if not, the transmitter is controlled in institute
State the location information that the first pedestrian device is broadcasted in the one 802.11 management frame.
In some embodiments, whether the processing unit may be additionally configured to: determining the receiver
The location information of the second vehicle, second vehicle ratio second at a distance from first vehicle are received in two predetermined amount of time
Preset distance is short；And if not, control the position that the transmitter broadcasts first vehicle in the 2nd 802.11 management frame
Confidence breath.
In some embodiments, the one 802.11 management frame or the 2nd 802.11 management frame can be beacon
Frame.In some embodiments, the processing unit may be additionally configured to the location information of the first pedestrian device
It is added in the BSSID field or ssid field of beacon frame.In some embodiments, the processing unit may also be configured
For the location information of first vehicle to be added in the BSSID field or ssid field of beacon frame.
In some embodiments, the one 802.11 management frame or the 2nd 802.11 management frame can be other
The frame of type, such as probing response frame, auth response frame and association response frame.
In some embodiments, first preset distance or the second preset distance can be 20 meters.
In some embodiments, the communication device may further include output device.The processing unit may go back quilt
It is configured to: believing in one position that the receiver receives in the first pedestrian device and the second pedestrian device
After breath, the position based on one and described first vehicle in the first pedestrian device and the second pedestrian device
Confidence breath, calculates one between first vehicle in the first pedestrian device and the second pedestrian device
Distance；And if distance calculated is shorter than preset distance, control output device generates alarm.
In some embodiments, the preset distance can be 10 meters.
In some embodiments, the communication system may further include the position for being configured for obtaining first vehicle
The positioning device (such as GPS device) of confidence breath.
In one embodiment, first pedestrian's device is provided.First pedestrian's device may include receiver, transmitter and place
Device is managed, the processing unit is configured for: being controlled the transmitter and is broadcasted first pedestrian in 802.11 management frames
The location information of device.
In some embodiments, the processing unit may be additionally configured to: determine whether to receive from the first vehicle
To the location information of second pedestrian's device, the second pedestrian device compares preset distance at a distance from the first pedestrian device
It is short；And if not, control the position letter that the transmitter broadcasts the first pedestrian device in 802.11 management frames
Breath.
In some embodiments, the processing unit can be configured for controlling the transmitter periodically or in institute
It states receiver and receives the location information for broadcasting the first pedestrian device after the location information of the second vehicle.
In some embodiments, 802.11 management frame can be probe request.In some embodiments, institute
Stating processing unit may be additionally configured to for the location information of the first pedestrian device to be added to the SSID of probe request
In field or BSSID field.
In some embodiments, 802.11 management frame can be other kinds of frame, such as checking request frame and
Association request frame.
In some embodiments, the preset distance can be 20 meters.
In some embodiments, the first pedestrian device may further include being configured for obtaining first pedestrian
The positioning device of the location information of device.
Detailed description of the invention
Foregoing and other feature of the invention will become from the description and the appended claims carried out below in conjunction with attached drawing
It must be more fully apparent from.It should be understood that these figures only describe some embodiments according to the present invention, and therefore it is not construed as pair
The limitation of the scope of the invention, thus will come that more clear and the present invention will be described in more detail by using attached drawing.
Fig. 1 is the schematic diagram of the driving scene on road；
Fig. 2 is the flow chart of the location information communication method 100 based on Wi-Fi according to an embodiment；
Fig. 3 is the flow chart of the location information communication method 200 based on Wi-Fi according to an embodiment；
Fig. 4 is the flow chart of the location information communication method 300 based on Wi-Fi according to an embodiment；
Fig. 5 is the schematic block diagram of the communication system 400 being mounted on the first vehicle according to an embodiment；And
Fig. 6 is the schematic block diagram of the communication system 500 being mounted on third pedestrian's device according to an embodiment.
Specific embodiment
In the following discussion, with reference to attached drawing, the attached drawing forms a part of the invention.In the accompanying drawings, the same symbol is logical
Often mark same parts, unless context dictates otherwise.The illustrative embodiment described in detailed description, drawings and claims
It is not intended to limit.In the case where not departing from the spirit or scope of theme proposed in this paper, other embodiments can be used
And other changes can be made.It will be readily understood that as substantially described and shown in the drawings of the invention each herein
Aspect can be arranged, replaced, combined and be designed with a variety of different configurations, and all these different configurations are all bright by the present invention
Really cover and becomes a part of the invention.
To improve driving safety, it is necessary to obtain the location information of pedestrian during driving for vehicle.
Fig. 1 is the schematic diagram of the driving scene on road.
With reference to Fig. 1, vehicle V0 to V8 is just travelled on road, and pedestrian's device P0 to P5 is present in the two sides of road
On.In some embodiments, each pedestrian's device can be carried by pedestrian or cyclist.
It is assumed that each of vehicle V0 to V8 and pedestrian's device P0 to P5 are equipped with wireless transmission and reception device, it is described
Vehicle and pedestrian's device can transmit its location information in frame.In some embodiments, vehicle V0 is to V8 and pedestrian
Each of device P0 to P5 can obtain location information equipped with positioning device (such as GPS device).Wi-Fi service
It can be arranged on vehicle V0 to V8 and pedestrian's device P0 to P5, and they may open Wi-Fi to send and receive
Frame.
Fig. 2 is the flow chart of the location information communication method 100 based on Wi-Fi according to an embodiment.
With reference to Fig. 2, in S101, the first vehicle determines whether in the first predetermined amount of time from close to the of the first vehicle
Two vehicles receive the location information of second vehicle.
In some embodiments, the location information of second vehicle can be carried in 802.11 management frames.Some
In embodiment, location information can be indicated by GPS coordinate.In some embodiments, the first predetermined amount of time can be three
Second.
In some embodiments, determine whether the second vehicle leans on based on the location information of the first vehicle and the second vehicle
Nearly first vehicle.In some embodiments, the location information of the first vehicle can be obtained from the GPS device being mounted on the first vehicle
?.In some embodiments, if than scheduled distance (such as 20 meters) at a distance from the first vehicle is between the second vehicle
Shorter, the first vehicle can determine that the second vehicle is proximate to the first vehicle.
With reference to Fig. 1, hereinafter, for purposes of illustration using vehicle V0 as the first vehicle.In the first predetermined amount of time, vehicle
V0 can receive 802.11 management frames of the location information including vehicle V1 from vehicle V1, and determine whether vehicle V1 leans on
Nearly vehicle V0.For example, if what is calculated by vehicle V0 is (such as than scheduled distance at a distance from vehicle V0 is between vehicle V1
20 meters) it is 10 meters shorter, method 100 can advance to S103, not broadcast the location information of the first vehicle.If vehicle V0 with
For the distance between vehicle V1 than scheduled apart from longer, method 100 can advance to S105.
In S105, the first vehicle broadcasts its location information in the one 802.11 management frame.
In some embodiments, the one 802.11 management frame can be beacon frame.In some embodiments,
Its location information (such as GPS coordinate) can be added in the BSSID field of beacon frame by one vehicle.And the SSID of beacon frame
Field may include the bit sequence for indicating Apply Names.For example, bit sequence " 010 " can be carried in the ssid field of beacon frame
To indicate that " pedestrian detection " is applied.In practice, the first vehicle can receive various frames, and only the part of various frames can
To be to apply relevant 802.11 management frame to " pedestrian detection ".First vehicle can be managed based on being carried on relevant 802.11
The bit sequence of " pedestrian detection " application is indicated in frame to identify relevant 802.11 management frame.In some embodiments, first
Its identifier (ID) can be added in the one 802.11 management frame by vehicle.
In some embodiments, its location information can be added in the ssid field of beacon frame by the first vehicle.?
In some embodiments, the one 802.11 management frame can be other kinds of frame, such as probing response frame, auth response frame and
Association response frame.
In some embodiments, if being not received by the location information of other vehicles in the first predetermined amount of time,
First vehicle directly can broadcast its location information in the one 802.11 management frame.For example, in the first predetermined amount of time, vehicle
V0 may not receive location information from any other vehicle, so that vehicle V0 broadcasts its location information.
In some embodiments, S101 to S105 can be performed periodically.
From finding out above, first vehicle is based on determining whether receive the position letter of the vehicle close to the first vehicle
Breath, broadcasts its location information in the one 802.11 management frame.Therefore, mitigate channel congestion.
Fig. 3 is the flow chart of the location information communication method 200 based on Wi-Fi according to an embodiment.
In S201, after the location information that first pedestrian's device receives first pedestrian's device, the first vehicle is set
Determine second time period.
In some embodiments, the location information of the first pedestrian device can be carried in 802.11 management frames.?
In some embodiments, 802.11 management frames may further include indicating application name identical with Apply Names described in S105
The bit sequence of title, so that the first vehicle can determine that 802.11 management frames are related to application and after executing in method 200
Continuous process.
In some embodiments, the second time period can be three seconds.In some embodiments, the first vehicle can
With the ID of the transmitter in the frame based on the location information for including first pedestrian's device of carrying, it is determined whether from another vehicle
Or the location information of first pedestrian's device is received from first pedestrian's device.
In S203, the first vehicle determines whether to receive in second time period from third vehicle to be filled close to the first pedestrian
The location information for the second pedestrian's device set.
In some embodiments, the second pedestrian is determined based on the location information of first pedestrian's device and second pedestrian's device
Whether device is close to first pedestrian's device.In some embodiments, if first pedestrian's device and second pedestrian's device it
Between distance it is more shorter than scheduled distance (such as 20 meters), the first vehicle can determine that two pedestrian's devices are close to each other.
With reference to Fig. 1, for example, vehicle V0 receives the location information of pedestrian's device P0 from pedestrian's device P0, and start
To second time period.If vehicle V0 receives pedestrian's device from another vehicle (for example, vehicle V4) in second time period
The location information of P1, vehicle V0 calculate the distance between pedestrian's device P0 and pedestrian's device P1.If it is determined that the distance is than pre-
Fixed distance (such as 20 meters) is shorter, and method 200 can advance to S205, not broadcast the location information of first pedestrian's device；It is no
Then advance to S207.
In S207, the first vehicle broadcasts the location information of first pedestrian's device in the 2nd 802.11 management frame.
In some embodiments, the 2nd 802.11 management frame can be beacon frame.In some embodiments, the first vehicle
Can by the location information (such as GPS coordinate) of received first pedestrian device be added in the BSSID field of beacon frame.
And the ssid field of beacon frame may include the bit sequence for indicating Apply Names identical with the one 802.11 management frame.One
In a little embodiments, its ID can be added in the 2nd 802.11 management frame by the first vehicle.
In some embodiments, the first vehicle can by the location information of received first pedestrian device be added to letter
In the ssid field for marking frame.In some embodiments, the 2nd 802.11 management frame can be other kinds of frame, such as detect
Response frame, auth response frame and association response frame.
In some embodiments, if being not received by the location information of second pedestrian's device in second time period,
First vehicle can directly broadcast the location information of first pedestrian's device in the 2nd 802.11 management frame.For example, vehicle V0 exists
The location information of pedestrian's device in addition to pedestrian's device P0 is likely not to have received in second time period, so that vehicle V0 is broadcasted
The location information of pedestrian's device P0.
In some embodiments, once receiving the location information of first pedestrian's device, the first vehicle can be directly wide
Broadcast received first pedestrian device location information.
From finding out above, after receiving location information from first pedestrian's device, the first vehicle can be based on determination
The no location information for receiving second pedestrian's device close to first pedestrian's device, broadcasts first in the 2nd 802.11 management frame
The location information of pedestrian's device, this can reduce channel congestion and is avoided broadcast storm.
In some embodiments, obtain one location information in first pedestrian's device and second pedestrian's device it
Afterwards, the first vehicle can calculate one in first pedestrian's device and second pedestrian's device between the first vehicle away from
From, and by the distance compared with scheduled distance.If distance is than scheduled apart from short, the first vehicle can produce alarm
To remind user.In some embodiments, preset distance can be 10 meters.
Fig. 4 is the flow chart of the location information communication method 300 based on Wi-Fi according to an embodiment.
In S301, after receiving the location information of the 4th vehicle from the 4th vehicle, third pedestrian's device setting the
Three periods.
In some embodiments, third pedestrian device (such as mobile phone) can be taken by pedestrian or cyclist
Band.In some embodiments, the third period can be three seconds.
In some embodiments, the location information of the 4th vehicle can be carried in 802.11 management frames.In some implementations
In scheme, 802.11 management frames may further include indicating Apply Names identical with Apply Names described in method 200
Bit sequence, so that third pedestrian device can determine whether 802.11 management frames are related to application and execute in method 300
Subsequent process.In some embodiments, Wi-Fi service can be arranged on third pedestrian's device, and third pedestrian
Device can open Wi-Fi to send and receive frame.
In S303, third pedestrian's device determines whether to receive in the third period from vehicle to be filled close to third pedestrian
The location information for the fourth line people's device set.
In some embodiments, the location information of fourth line people device can be carried in 802.11 management frames.And
802.11 management frames may further include the bit sequence for indicating Apply Names identical with Apply Names described in S301.
In some embodiments, fourth line people is determined based on the location information of third pedestrian device and fourth line people's device
Whether device is close to third pedestrian's device.In some embodiments, the location information of third pedestrian device can be from being mounted on
Positioning device (such as GPS module) on three pedestrian's devices obtains.In some embodiments, if third pedestrian device with
The distance between fourth line people's device is more shorter than scheduled distance (such as 20 meters), and third pedestrian device can determine two pedestrians
Device is close to each other.
With reference to Fig. 1, for example, pedestrian's device P2 receives the location information of vehicle V3 from vehicle V3, and is started waiting
Three periods.If one in the third period from vehicle V0 into V8 of pedestrian's device P2 receives the position of pedestrian's device P4
Confidence breath, pedestrian's device P2 calculate the distance between pedestrian's device P2 and pedestrian's device P4.If it is determined that the distance is than predetermined
Distance (such as 20 meters) it is shorter, method 300 can advance to S305, not broadcast the location information of third pedestrian's device；Otherwise
Advance to S307.
In S307, third pedestrian device broadcasts its location information in the 3rd 802.11 management frame.
In some embodiments, the 3rd 802.11 management frame can be probe request.In some embodiments,
Its location information (such as GPS coordinate) can be added in the ssid field of probe request by three pedestrian's devices.And it detects
The ssid field of claim frame may further include the bit sequence for indicating Apply Names identical with Apply Names described above.?
In practice, third pedestrian's device can receive various frames, and only the part of various frames can be and " pedestrian detection " application
Relevant 802.11 management frame.Third pedestrian device can indicate " pedestrian's inspection based on being carried in relevant 802.11 management frame
Survey " bit sequence of application identifies relevant 802.11 management frame.In some embodiments, third pedestrian device can be by it
ID is added in the 3rd 802.11 management frame.
In some embodiments, its location information can be added to the BSSID of probe request by third pedestrian device
In field.In some embodiments, the 3rd 802.11 management frame can be other kinds of frame, such as checking request frame and pass
Join claim frame.
In some embodiments, if not receiving the position of fourth line people's device from vehicle in the third period
Information, third pedestrian device directly can broadcast its location information in the 3rd 802.11 management frame.For example, pedestrian's device P2 can
The location information that other pedestrian's devices can not received from vehicle V0 to V8 in the third period, so that pedestrian position P2 is wide
Broadcast its location information.
In some embodiments, third pedestrian device may not be broadcasted is touched by the location information for receiving the 4th vehicle
Its location information of hair.In some embodiments, third pedestrian device can be broadcast periodically its location information.Namely
It says, in each period, third pedestrian's device may determine whether to receive the fourth line close to third pedestrian device from vehicle
The location information of people's device.If not, third pedestrian device can broadcast its location information in the 3rd 802.11 management frame；Instead
?.
In some embodiments, when detecting that third pedestrian's device on lane or when close to lane, can execute base
In the location information communication method 300 of Wi-Fi.With reference to Fig. 1, pedestrian's device P5 can determine it far from road and need not broadcast
Its location information.
From finding out above, before the location information of broadcast third pedestrian device, third pedestrian's device is determined close to third
Whether another pedestrian's device of pedestrian's device has broadcasted its location information.If so, third pedestrian device may not broadcast
The location information of third pedestrian's device, this can mitigate channel congestion and be avoided broadcast storm.It is well known in the art
Be that 802.11 agreement regulation clients cannot receive frame from other clients.Here, vehicle as access point and pedestrian fill
It sets as client.Therefore, pedestrian's device cannot be received by the frame of other pedestrian's devices broadcastings.In embodiments above,
Third pedestrian device based on vehicle broadcast received pedestrian's device location information, execute determination process 303.
In the location information communication method above based on Wi-Fi, 802.11 management frames are overloads so as to vehicle
Or the location information of pedestrian's device, so that the vehicle and pedestrian device for having already turned on Wi-Fi may be implemented to broadcast its position letter
Breath, this ensures the fast propagation of location information and further ensures that driving safety.In addition, a part of vehicle or a part of pedestrian
Device may need not broadcast its location information, this can reduce channel congestion and is avoided broadcast storm.
Fig. 5 is the schematic block diagram of the communication system 400 being mounted on the first vehicle according to an embodiment.With reference to
Fig. 5, communication system 400 include positioning device 401, receiver 403, transmitter 405, processing unit 407, audible alarm generator
409 and storage device 411.
Positioning device 401 can be configured for obtaining the location information of the first vehicle, for example, the geography of communication system 400
Coordinate.In some embodiments, positioning device 401 can be GPS device.Receiver 403 can be configured for from other
Vehicle and pedestrian device receiving frame.Transmitter 405 can be configured for broadcast frame.
Processing unit 407 can be configured for: determining whether to receive in the first predetermined amount of time from the second vehicle and lean on
The location information of second vehicle of nearly first vehicle；The location information of first vehicle is added in the one 802.11 management frame；
And control transmitter 405 plays the one 802.11 management frame.In some embodiments, the first time period can be 3
Second.
In some embodiments, processing unit 407 may be additionally configured to: be filled in receiver 403 from the first pedestrian
After setting the location information for receiving first pedestrian's device, second time period is set；Determine whether in second time period from
Three vehicles receive the location information of second pedestrian's device close to first pedestrian's device；By received first pedestrian device
Location information is added in the 2nd 802.11 management frame；And control transmitter 405 broadcasts the 2nd 802.11 management frame.Some
In embodiment, second time period be can be 3 seconds.
In some embodiments, 802.11 management frame of the first or second can be beacon frame, probing response frame, verifying sound
Answer frame or association response frame.
In some embodiments, processing unit 407 may be also configured to: once receiver 401 receives the first row
One location information in people's device and second pedestrian's device, calculates the first vehicle and first pedestrian's device and the second pedestrian fills
It is the distance between one in setting；By the distance compared with scheduled distance；And if the distance is than scheduled
Apart from shorter, audible alarm generator 409 is controlled to generate alarm to refer to user.In some embodiments, scheduled
Distance can be 10 meters.
In some embodiments, receiver 403 and transmitter 405 may be integrally incorporated in a device, such as wireless network
Network interface card (Network Interface Card, NIC).Processing unit 407 can be CPU or MCU or DSP etc. or it
Any combination.Storage device 411 can storage program area and program instruction.
Fig. 6 is the schematic block diagram of the communication system 500 being mounted on third pedestrian's device according to an embodiment.
With reference to Fig. 6, the communication system 500 being mounted on third pedestrian's device may include positioning device 501, receiver 503, transmitter
505, processing unit 507 and storage device 509.In some embodiments, third pedestrian device can by pedestrian or ride from
Driving person carries.
Positioning device 501 can be configured for obtaining the location information of third pedestrian device, for example, communication system 500
Geographical coordinate.In some embodiments, positioning device 501 can be GPS module.Receiver 503 can be configured for from
Vehicle receiving frame.Transmitter 505 can be configured for broadcast frame.
Processing unit 507 can be configured for: receive the location information of the 4th vehicle from the 4th vehicle in receiver 503
Later, the third period is set；It determines whether receiver 503 receives in the third period from vehicle to fill close to third pedestrian
The location information for the fourth line people's device set；The location information of third pedestrian's device is added to the 3rd 802.11 management frame；With
And control transmitter 505 broadcasts the 3rd 802.11 management frame.
In some embodiments, the 3rd 802.11 management frame can be probe request, checking request frame or association and ask
Seek frame.
In some embodiments, receiver 503 and transmitter 505 may be integrally incorporated in a device, such as wirelessly
NIC.Processing unit 507 can be CPU or MCU or DSP etc. or any combination of them.Storage device 509 can store operation
System and program instruction.
According to an embodiment, it provides based on a kind of non-transitory comprising the computer program by transmitting location information
Calculation machine readable medium.When computer program is executed by processor, it will instruct processor: determine whether in predetermined amount of time
Inside receive the location information of the first vehicle close to processor；And if not, broadcasting its position in 802.11 management frames
Information.
Almost without difference between the hardware realization and software realization of system aspects；It the use of hardware or software is usually table
It is shown as this design alternative with efficiency trade-off.For example, if implementor determine speed and accuracy be it is most important, realize
Person may be selected based on hardware and/or firmware vehicle；If flexibility be it is most important, implementor may be selected with software reality
Based on existing；Alternatively, again alternatively, a certain combination of hardware, software and/or firmware may be selected in implementor.
Although disclosed herein various aspects and embodiment, other aspects and embodiment for this field that
It will be apparent for a little technical staff.Various aspects disclosed herein and embodiment are in order to for example, and not
Be considered as it is restrictive, following claims will indicate possessed by true scope and spirit.
Claims (10)
1. a kind of location information communication method based on Wi-Fi characterized by comprising
The communication device being mounted on the first vehicle determines whether the position that the second vehicle is received in the first predetermined amount of time
Information, second vehicle are shorter than the first preset distance at a distance from first vehicle；And
If not, broadcasting the location information of first vehicle in the one 802.11 management frame；
The method also includes:
After the location information that first pedestrian's device receives the first pedestrian device, second time period is set；
The location information for receiving second pedestrian's device from other vehicles in the second time period is determined whether, wherein described
The distance between second pedestrian's device and the first pedestrian device are shorter than the second preset distance；And
If not, broadcasting the location information of the first pedestrian device in the 2nd 802.11 management frame.
2. a kind of location information communication method based on Wi-Fi characterized by comprising
After the location information that first pedestrian's device receives the first pedestrian device, first time period is set；
The location information for receiving second pedestrian's device from other vehicles in the first time period is determined whether, wherein described
The distance between second pedestrian's device and the first pedestrian device are shorter than the first preset distance；And
If not, the communication device being mounted on the first vehicle broadcasts the first pedestrian device in the one 802.11 management frame
The location information.
3. according to the method described in claim 2, it is characterized by further comprising:
Determine whether the location information that the second vehicle is received in the second predetermined amount of time, second vehicle and described first
The distance of vehicle is shorter than the second preset distance；And
If not, broadcasting the location information of first vehicle in the 2nd 802.11 management frame.
4. a kind of location information communication method based on Wi-Fi characterized by comprising
First pedestrian's device determines whether the location information that second pedestrian's device is received from the first vehicle, the second pedestrian dress
It sets shorter than preset distance at a distance from the first pedestrian device；And
If not, broadcasting the location information of the first pedestrian device in 802.11 management frames.
5. according to the method described in claim 4, it is characterized in that, the first pedestrian device periodically or is receiving
The location information of the first pedestrian device is broadcasted after the location information of two vehicles.
6. a kind of communication system being mounted on the first vehicle, which is characterized in that including receiver, transmitter and processing unit,
The processing unit is configured for:
Determine whether the receiver receives the location information of the second vehicle, second vehicle in the first pre- predetermined amount of time
It is shorter than the first preset distance at a distance from first vehicle；And
If not, the location information that the transmitter broadcasts first vehicle in the one 802.11 management frame is controlled,
The processing unit is additionally configured to:
In the receiver after the location information that first pedestrian's device receives the first pedestrian device, when setting second
Between section；
Determine whether the receiver is believed in the second time period from the position that other vehicles receive second pedestrian's device
Breath, wherein the distance between the second pedestrian device and the first pedestrian device are shorter than the second preset distance；And
If not, controlling the position letter that the transmitter broadcasts the first pedestrian device in the 2nd 802.11 management frame
Breath.
7. a kind of communication system being mounted on the first vehicle, which is characterized in that including receiver, transmitter and processing unit,
The processing unit is configured for:
In the receiver after the location information that first pedestrian's device receives the first pedestrian device, when setting first
Between section；
Determine whether the receiver is believed in the first time period from the position that other vehicles receive second pedestrian's device
Breath, wherein the distance between the second pedestrian device and the first pedestrian device are shorter than the first preset distance；And
If not, controlling the position letter that the transmitter broadcasts the first pedestrian device in the one 802.11 management frame
Breath.
8. system according to claim 7, which is characterized in that the processing unit is additionally configured to:
Determine whether the receiver receives the location information of the second vehicle, second vehicle in the second predetermined amount of time
With it is shorter than the second preset distance at a distance from first vehicle；And
If not, controlling the location information that the transmitter broadcasts first vehicle in the 2nd 802.11 management frame.
9. a kind of first pedestrian's device, which is characterized in that including receiver, transmitter and processing unit, the processing unit quilt
It is configured to:
Determine whether the location information that second pedestrian's device is received from the first vehicle, the second pedestrian device and described first
The distance of pedestrian's device is shorter than preset distance；And
If not, controlling the location information that the transmitter broadcasts the first pedestrian device in 802.11 management frames.
10. the first pedestrian device according to claim 9, which is characterized in that the processing unit is configured for controlling
The transmitter broadcasts first pedestrian periodically or after the location information that the receiver receives the second vehicle
The location information of device.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2014/076355 WO2015165002A1 (en) | 2014-04-28 | 2014-04-28 | Pedestrian detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106415689A CN106415689A (en) | 2017-02-15 |
| CN106415689B true CN106415689B (en) | 2019-07-16 |
Family
ID=
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398976A (en) * | 2007-09-28 | 2009-04-01 | 日产自动车株式会社 | Current position information reporting system, information center apparatus, and method thereof |
| CN102044145A (en) * | 2009-10-20 | 2011-05-04 | 通用汽车环球科技运作公司 | Vehicle to entity communication |
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101398976A (en) * | 2007-09-28 | 2009-04-01 | 日产自动车株式会社 | Current position information reporting system, information center apparatus, and method thereof |
| CN102044145A (en) * | 2009-10-20 | 2011-05-04 | 通用汽车环球科技运作公司 | Vehicle to entity communication |
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