CN104717308B - A kind of implementation method of vehicle-mounted cloud - Google Patents
A kind of implementation method of vehicle-mounted cloud Download PDFInfo
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- CN104717308B CN104717308B CN201510160869.7A CN201510160869A CN104717308B CN 104717308 B CN104717308 B CN 104717308B CN 201510160869 A CN201510160869 A CN 201510160869A CN 104717308 B CN104717308 B CN 104717308B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
Abstract
The track that this vehicle-mounted net is included between access node and the class node of vehicle node two, two access nodes constitutes vehicle-mounted cloud domain；One access node belongs to more than one vehicle-mounted cloud domain, and access node is equipped with an IPv6 address in each affiliated vehicle-mounted cloud domain；Data in vehicle-mounted cloud only have validity in vehicle-mounted cloud domain；The unicast address of vehicle node includes two parts：Part I is vehicle-mounted cloud domain ID, it is global route prefix, the vehicle-mounted cloud domain of unique mark one, the home address or the vehicle-mounted cloud domain ID of Care-of Address obtained in a vehicle-mounted cloud domain is all identical, and its value is equal to the vehicle-mounted cloud domain ID of access node in identical vehicle-mounted cloud domain；Vehicle node in Part II vehicle node ID, the vehicle-mounted cloud domain of its unique mark one, the present invention obtains service data using mode of unicast, therefore reduces the delay for obtaining service data and cost, improves service quality.
Description
Technical field
The present invention relates to a kind of implementation method, more particularly to a kind of implementation method of vehicle-mounted cloud.
Background technology
Vehicle-mounted cloud is built upon on vehicle-mounted net and can provide a kind of service mode of local service.In recent years, Hen Duoyan
Study carefully work and be directed to vehicle-mounted cloud, to enable vehicle drive people's quick obtaining network service.With the development of vehicle-mounted network technology,
Vehicle-mounted cloud can turn into a kind of following pattern for providing service.
At present, the implementation pattern of vehicle-mounted cloud is realized by broadcasting, therefore delay and cost reduce net all than larger
Network service performance.Therefore, the hot issue of delay and cost as Recent study that vehicle-mounted cloud provides service how is reduced.
The present invention realizes vehicle-mounted cloud by way of unicast substitution broadcast, so as to reduce the delay that vehicle-mounted cloud provides service
And cost, so as to effectively improve network service performance.
The content of the invention
Goal of the invention：The technical problems to be solved by the invention are that there is provided a kind of vehicle-mounted cloud in view of the shortcomings of the prior art
Implementation method.
Technical scheme：The invention discloses a kind of implementation method of vehicle-mounted cloud, the vehicle-mounted net includes access node and car
Track between the class node of node two, two access nodes constitutes vehicle-mounted cloud domain；One access node belongs to more than one
Vehicle-mounted cloud domain, access node is equipped with an IPv6 address in each affiliated vehicle-mounted cloud domain；Data in vehicle-mounted cloud are only in car
Carrying has validity in cloud domain；
The unicast address of vehicle node includes two parts：Part I is vehicle-mounted cloud domain ID, and it is global route prefix, only
Vehicle-mounted cloud domain ID all phases of one one vehicle-mounted cloud domain of mark, the home address obtained in a vehicle-mounted cloud domain or Care-of Address
Together, its value is equal to the vehicle-mounted cloud domain ID of access node in identical vehicle-mounted cloud domain；Part II vehicle node ID, its unique mark one
Vehicle node in individual vehicle-mounted cloud domain, it is made up of access node ID and inside ID, one access of access node ID unique marks
Node, with network uniqueness in vehicle-mounted net, internal ID distributes to vehicle node by the access node ID access nodes identified,
Therefore vehicle node ID has uniqueness in vehicle-mounted cloud domain；Vehicle node often passes through an access node, then it represents that it will enter
Enter a new vehicle-mounted cloud domain, now, the vehicle node obtains the car in new vehicle-mounted cloud domain from the access node passed through
Cloud domain ID, node ID and inside ID are carried, and constitutes the Care-of Address in new vehicle-mounted cloud domain；
In vehicle-mounted cloud domain, each services provided service data by data ID unique marks；Vehicle node is used
Data address obtains a kind of service data for servicing and providing：One data address includes two parts, and Part I is data ID,
A kind of service data for servicing and providing uniquely is provided；In Part II vehicle node ID, the vehicle-mounted cloud domain of its unique mark one
Vehicle node, it is made up of access node ID and inside ID, one access node of access node ID unique marks, with vehicle-mounted net
Interior network uniqueness, internal ID distributes to vehicle node by the access node ID access nodes identified；Service in the present invention
It can only be provided by vehicle node.
The length of data address is less than the length of the unicast address of vehicle node, and vehicle node distinguishes number by address size
According to address and the unicast address of vehicle node；The unicast address length sum of vehicle node is the car in 128 bits, unicast address
It is [64,112] to carry cloud domain ID length and set interval, and the length of data address is less than 128 bits.
Access node preserves more than one tables of data, and tables of data table name is data ID, and each list item includes two domains：One
Individual domain is vehicle node ID, and another domain is life span；
Vehicle-mounted cloud be carried in it is vehicle-mounted provide service using the communication of vehicle-mounted net on the net, the vehicle-mounted cloud by first node and cloud into
Member is constituted, and first node and cloud member are vehicle nodes, and each first node preserves a cloud membership table, and each list item includes two
Domain：One domain is the vehicle node ID of cloud member, and another domain is the resource that cloud member can be provided, and resource for example stores appearance
Amount, CPU speeds of service etc.；
When a vehicle node V1, which is ready to pass through operation application program, provides service data, it is by oneself labeled as vehicle-mounted
The first node of cloud, then creates vehicle-mounted cloud according to following processes：
Step 101：Start；
Step 102：Vehicle node V1 broadcast resource request messages, the source address of resource request message load is vehicle node
ID, the load of resource request is broadcasting area parameter h initial value and the type of request resource, such as computing resource and storage
Resource, resource request message is often broadcasted once, and range parameter h successively decreases 1；
Step 103：Neighbours' vehicle node is received after resource request message, if it has the resource that vehicle node V1 is asked
A resource response message is then returned to, resource response message load can provide the type of resource for it, and neighbours' vehicle node will
Broadcasting area parameter h successively decreases 1, then judges whether broadcasting area parameter h is more than 1, if greater than 0, then continues to broadcast the money
Source request message, otherwise abandons the resource request message；
Step 104：Vehicle node V1 detects the resource response message of all returns, and judges to return in resource response message
Resource type whether can meet the service requirement of application program, if can meet, carry out step 106, otherwise carry out step
105；
Step 105：Vehicle node V1 increase broadcasting area parameters h initial value, for example, be incremented by 1 or 2 by h, return to step
Rapid 102；
Step 106：The node for returning to resource response message is added to cloud membership table by vehicle node V1, and to each cloud into
Member returns to resource confirmation message, and the load of resource confirmation message is the subprogram for the application program run；
Step 107：Cloud member is received after resource confirmation message, and vehicle node V1 is labeled as into first node, then processing point
The subprogram matched somebody with somebody, and return result to vehicle node V1；
Step 108：The result for the subprogram that vehicle node V1 processing cloud members return simultaneously forms complete service data, so
Afterwards data sharing message, the service data that data sharing Message Payload provides for vehicle node V1 are sent to each cloud member unicast
And data ID；The access nodes of vehicle node V1 also simultaneously into the vehicle-mounted cloud domain in place send tables of data and create message, data
Table creates the vehicle node ID that Message Payload is data ID and all cloud members；
Step 109：Cloud member is received after data sharing message, preserve data sharing Message Payload in service data and
Data ID；Access node receives tables of data and created after message, sets up a tables of data, the entitled data ID of the table, in the table
In increase the life span in a list item, list item for vehicle node V1 and each cloud member and be set to maximum, such as 10 points
Clock；
Step 110：Terminate；
Broadcasting area parameter h maximum is no more than 10；Life span in tables of data list item is set to maximum and not surpassed
Spend 120 minutes.
By said process, vehicle-mounted cloud, which is set up, to be completed, and each cloud member can provide service data, it is achieved thereby that service
Data sharing, and service data is provided a user by distributed way.
In the method for the invention, show that it will be from current vehicle-mounted when a vehicle node V1 is by an access node
Cloud domain VCD1 enters a new vehicle-mounted cloud domain VCD2；If vehicle node V1 is that data ID is provided in vehicle-mounted cloud domain VCD1 is C1
Cloud member when, vehicle node V1 obtains vehicle-mounted cloud domain VCD2 data simultaneously by nullifying cloud member identities during access node
Table, comprises the following steps：
Step 201：Start；
Step 202：Access node is received after vehicle node V1 beacon frame, is judged according to vehicle node V1 move angle
Go out vehicle node V1 to travel from vehicle-mounted cloud domain VCD1 to vehicle-mounted cloud domain VCD2, access node is deleted from table name for C1 tables of data
Data-message is sent except vehicle node V1, and to vehicle node V1, data-message load is all numbers in vehicle-mounted cloud domain VCD2
According to table；
Step 203：Vehicle node V1 is received after data-message, records tables of data all in vehicle-mounted cloud domain VCD2；
Step 204：Terminate；
By said process, the vehicle node in the new vehicle-mounted cloud domain of an entrance can obtain the tables of data in new vehicle-mounted cloud domain,
The service that vehicle-mounted cloud domain where being known by tables of data can be provided, while applying for this service data.
In the method for the invention, when vehicle node V5 is new from current vehicle-mounted cloud domain into one by an access node
Vehicle-mounted cloud domain VCD1 when, vehicle node V5 obtains vehicle-mounted cloud domain VCD1 tables of data by access node；
Vehicle node V5 passes through service datas of following Procedure Acquisition data ID for C1：
Step 301：Start；
Step 302：Vehicle node V5 selection life span most long vehicle node V2 in table name is C1 tables of data, together
When build a data address, the vehicle node ID of data address is vehicle node V2 vehicle node ID, and data ID is C1, so
A data request information is built afterwards, and data request information destination address is the address date newly built, last vehicle node V5
The data request information of structure is sent to the next-hop node that destination node is vehicle node V2；
Step 303：Next-hop node is received after data request information, if it is access node or had been detached from vehicle-mounted
Cloud domain VCD1, then abandon the message, carries out step 309, otherwise performs step 304；
Step 304：The data ID for the destination address that next-hop node passes through data request information judges that vehicle node V5 is needed
The service data that data ID is C1 is obtained, if next-hop node can provide the service data that data ID is C1, then hold
Row step 306, otherwise performs step 305；
Step 305：Data request information is sent to destination node for vehicle node by next-hop node according to routing iinformation
V2 next-hop node, return to step 303；
Step 306：Next-hop node returns to a data response message to vehicle node V5, and the load of data response message is
Data ID is C1 service data；
Step 307：Vehicle node V5 is received after data response message, preserves the service data that data ID is C1, and to connecing
Ingress, which is sent, adds cloud message, and it is the data ID that this step is preserved to add cloud Message Payload；
Step 308：Access node is received after addition cloud message, and car is increased in table name is data ID C1 tables of data
Node V5 list item, life span is set to maximum；
Step 309：Terminate；
In said process, if vehicle node V2 is departing from vehicle-mounted cloud domain VCD1 and in vehicle node V5 to vehicle node V2
Routed path on do not have intermediate node can provide data ID be C1 service data, then vehicle node V5 table name be C1
Tables of data in reselect a life span most long vehicle node and perform step 301~step 309 and obtain data ID and be
C1 service data；
By said process, vehicle node obtains service data by mode of unicast from closest cloud member, from
And the delay for obtaining service data and cost are effectively reduced, while the vehicle node for obtaining service data also transitions into cloud member
Data are provided, the stability of cloud number of members is so may insure, so that it is guaranteed that obtaining the success rate of service data.
Beneficial effect：The invention provides a kind of implementation method of vehicle-mounted cloud, vehicle node passes through provided by the present invention
Vehicle-mounted cloud implementation method can obtain service data from closest cloud member with mode of unicast, shorten acquisition service data
Delay and cost, service quality is improved, present invention can apply to fields such as road conditions monitoring, vehicle managements, with wide
General application prospect.
Brief description of the drawings
The present invention is done with reference to the accompanying drawings and detailed description and further illustrated, of the invention is above-mentioned
And/or otherwise advantage will become apparent.
Fig. 1 is vehicle-mounted cloud architectural schematic of the present invention.
Fig. 2 is unicast address structural representation of the present invention.
Fig. 3 is data address structural representation of the present invention.
Fig. 4 is the schematic flow sheet of the present invention for creating vehicle-mounted cloud.
Fig. 5 is the schematic flow sheet of the present invention for obtaining tables of data.
Fig. 6 is the schematic flow sheet of the present invention for obtaining service data.
Embodiment：
The invention provides a kind of implementation method of vehicle-mounted cloud, vehicle node is existing by vehicle-mounted mysorethorn provided by the present invention
Method can obtain service data from closest cloud member with mode of unicast, shorten the delay for obtaining service data and generation
Valency, improves service quality, present invention can apply to fields such as road conditions monitoring, vehicle managements, before having a wide range of applications
Scape.
Fig. 1 is vehicle-mounted cloud architectural schematic of the present invention.The vehicle-mounted net includes access node 1 and vehicle section
Track between 2 liang of class nodes of point, two access nodes 1 constitutes vehicle-mounted cloud domain 3；One access node 1 belongs to more than one
Vehicle-mounted cloud domain 3, access node 1 is equipped with an IPv6 address in each affiliated vehicle-mounted cloud domain 3；Data in vehicle-mounted cloud only exist
There is validity in vehicle-mounted cloud domain 3.
Fig. 2 is unicast address structural representation of the present invention.The unicast address of vehicle node includes two parts：First
Part is vehicle-mounted cloud domain ID, and it is global route prefix, and the vehicle-mounted cloud domain of unique mark one is obtained in a vehicle-mounted cloud domain
The vehicle-mounted cloud domain ID of home address or Care-of Address is identical, and its value is equal to the vehicle-mounted cloud of access node in identical vehicle-mounted cloud domain
Domain ID；Vehicle node in Part II vehicle node ID, the vehicle-mounted cloud domain of its unique mark one, it is by access node ID and interior
Portion ID is constituted, one access node of access node ID unique marks, and with network uniqueness in vehicle-mounted net, internal ID is saved by access
The access node that point ID is identified distributes to vehicle node, therefore vehicle node ID has uniqueness in vehicle-mounted cloud domain；Vehicle
Node often passes through an access node, then it represents that it will enter a new vehicle-mounted cloud domain, now, and the vehicle node is from described
The access node passed through obtains the vehicle-mounted cloud domain ID, access node ID and inside ID in new vehicle-mounted cloud domain, and constitutes new car
Carry the Care-of Address in cloud domain.
Fig. 3 is data address structural representation of the present invention.In vehicle-mounted cloud domain, each services provided clothes
Data of being engaged in are by data ID unique marks；Vehicle node obtains a kind of service data for servicing and providing using data address：One number
Include two parts according to address, Part I is data ID, a kind of service data for servicing and providing uniquely is provided；Part II car
Vehicle node in node ID, the vehicle-mounted cloud domain of its unique mark one, it is made up of access node ID and inside ID, and access is saved
One access node of point ID unique marks, with network uniqueness in vehicle-mounted net, internal ID is by connecing that access node ID is identified
Ingress distributes to vehicle node；
The length of data address is less than the length of the unicast address of vehicle node, and vehicle node distinguishes number by address size
According to address and the unicast address of vehicle node.The unicast address length sum of vehicle node is the car in 128 bits, unicast address
It is [64,112] to carry cloud domain ID length and set interval, and the length of data address is less than 128 bits.
Fig. 4 is the schematic flow sheet of the present invention for creating vehicle-mounted cloud.Access node preserves more than one tables of data,
Tables of data table name is data ID, and each list item includes two domains：One domain is vehicle node ID, and another domain is life span；
Vehicle-mounted cloud be carried in it is vehicle-mounted provide service using the communication of vehicle-mounted net on the net, the vehicle-mounted cloud by first node and cloud into
Member is constituted, and first node and cloud member are vehicle nodes, and each first node preserves a cloud membership table, and each list item includes two
Domain：One domain is the vehicle node ID of cloud member, and another domain is the resource that cloud member can be provided, such as memory capacity,
CPU speeds of service etc.；
When a vehicle node V1, which is ready to pass through operation application program, provides service data, it is by oneself labeled as vehicle-mounted
The first node of cloud, then creates vehicle-mounted cloud according to following processes：
Step 101：Start；
Step 102：Vehicle node V1 broadcast resource request messages, the source address of resource request message load is vehicle node
ID, the load of resource request is broadcasting area parameter h initial value and the type of request resource, such as computing resource and storage
Resource, resource request message is often broadcasted once, and range parameter h successively decreases 1；
Step 103：Neighbours' vehicle node is received after resource request message, if it has the resource that vehicle node V1 is asked
A resource response message is then returned to, resource response message load can provide the type of resource for it, and neighbours' vehicle node will
Broadcasting area parameter h successively decreases 1, then judges whether broadcasting area parameter h is more than 1, if greater than 0, then continues to broadcast the money
Source request message, otherwise abandons the resource request message；
Step 104：Vehicle node V1 detects the resource response message of all returns, and judges to return in resource response message
Resource type whether can meet the service requirement of application program, if can meet, carry out step 106, otherwise carry out step
105；
Step 105：Vehicle node V1 increase broadcasting area parameters h initial value, for example, be incremented by 1 or 2 by h, return to step
Rapid 102；
Step 106：The node for returning to resource response message is added to cloud membership table by vehicle node V1, and to each cloud into
Member returns to resource confirmation message, and the load of resource confirmation message is the subprogram for the application program run；
Step 107：Cloud member is received after resource confirmation message, and vehicle node V1 is labeled as into first node, then processing point
The subprogram matched somebody with somebody, and return result to vehicle node V1；
Step 108：The result for the subprogram that vehicle node V1 processing cloud members return simultaneously forms complete service data, so
Afterwards data sharing message, the service data that data sharing Message Payload provides for vehicle node V1 are sent to each cloud member unicast
And data ID；The access nodes of vehicle node V1 also simultaneously into the vehicle-mounted cloud domain in place send tables of data and create message, data
Table creates the vehicle node ID that Message Payload is data ID and all cloud members；
Step 109：Cloud member is received after data sharing message, preserve data sharing Message Payload in service data and
Data ID；Access node receives tables of data and created after message, sets up a tables of data, the entitled data ID of the table, in the table
In increase the life span in a list item, list item for vehicle node V1 and each cloud member and be set to maximum, such as 10 points
Clock；
Step 110：Terminate；
Broadcasting area parameter h maximum is no more than 10；Life span in tables of data list item is set to maximum and not surpassed
Spend 120 minutes.
By said process, vehicle-mounted cloud, which is set up, to be completed, and each cloud member can provide service data, it is achieved thereby that service
Data sharing, and service data is provided a user by distributed way.
Fig. 5 is the schematic flow sheet of the present invention for obtaining tables of data.When a vehicle node V1 passes through an access
Show that it will enter a new vehicle-mounted cloud domain VCD2 from current vehicle-mounted cloud domain VCD1 during node；If vehicle node V1 is vehicle-mounted
When the cloud member that data ID is C1 is provided in the VCD1 of cloud domain, vehicle node V1 during access node by nullifying cloud member identities simultaneously
Vehicle-mounted cloud domain VCD2 tables of data is obtained, is comprised the following steps：
Step 201：Start；
Step 202：Access node is received after vehicle node V1 beacon frame, is judged according to vehicle node V1 move angle
Go out vehicle node V1 to travel from vehicle-mounted cloud domain VCD1 to vehicle-mounted cloud domain VCD2, access node is deleted from table name for C1 tables of data
Data-message is sent except vehicle node V1, and to vehicle node V1, data-message load is all numbers in vehicle-mounted cloud domain VCD2
According to table；
Step 203：Vehicle node V1 is received after data-message, records tables of data all in vehicle-mounted cloud domain VCD2；
Step 204：Terminate；
By said process, the vehicle node in the new vehicle-mounted cloud domain of an entrance can obtain the tables of data in new vehicle-mounted cloud domain,
The service that vehicle-mounted cloud domain where being known by tables of data can be provided, while applying for this service data.
Fig. 6 is the schematic flow sheet of the present invention for obtaining service data.When vehicle node V5 is saved by an access
When point enters a new vehicle-mounted cloud domain VCD1 from current vehicle-mounted cloud domain, vehicle node V5 obtains vehicle-mounted cloud domain by access node
VCD1 tables of data；
Vehicle node V5 passes through service datas of following Procedure Acquisition data ID for C1：
Step 301：Start；
Step 302：Vehicle node V5 selection life span most long vehicle node V2 in table name is C1 tables of data, together
When build a data address, the vehicle node ID of data address is vehicle node V2 vehicle node ID, and data ID is C1, so
A data request information is built afterwards, and data request information destination address is the address date newly built, last vehicle node V5
The data request information of structure is sent to the next-hop node that destination node is vehicle node V2；
Step 303：Next-hop node is received after data request information, if it is access node or had been detached from vehicle-mounted
Cloud domain VCD1, then abandon the message, carries out step 309, otherwise performs step 304；
Step 304：The data ID for the destination address that next-hop node passes through data request information judges that vehicle node V5 is needed
The service data that data ID is C1 is obtained, if next-hop node can provide the service data that data ID is C1, then hold
Row step 306, otherwise performs step 305；
Step 305：Data request information is sent to destination node for vehicle node by next-hop node according to routing iinformation
V2 next-hop node, return to step 303；
Step 306：Next-hop node returns to a data response message to vehicle node V5, and the load of data response message is
Data ID is C1 service data；
Step 307：Vehicle node V5 is received after data response message, preserves the service data that data ID is C1, and to connecing
Ingress, which is sent, adds cloud message, and it is the data ID that this step is preserved to add cloud Message Payload；
Step 308：Access node is received after addition cloud message, and car is increased in table name is data ID C1 tables of data
Node V5 list item, life span is set to maximum；
Step 309：Terminate；
In said process, if vehicle node V2 is departing from vehicle-mounted cloud domain VCD1 and in vehicle node V5 to vehicle node V2
Routed path on do not have intermediate node can provide data ID be C1 service data, then vehicle node V5 table name be C1
Tables of data in reselect a life span most long vehicle node and perform step 301~step 309 and obtain data ID and be
C1 service data；
By said process, vehicle node obtains service data by mode of unicast from closest cloud member, from
And the delay for obtaining service data and cost are effectively reduced, while the vehicle node for obtaining service data also transitions into cloud member
Data are provided, the stability of cloud number of members is so may insure, so that it is guaranteed that obtaining the success rate of service data.
Embodiment 1
Based on the simulation parameter of table 1, the present embodiment simulates the vehicle-mounted cloud implementation method in the present invention, and performance evaluation is such as
Under：In the case that traffic density is constant, with the speed increase of vehicle node, the probability that cloud member departs from this vehicle-mounted cloud domain increases
Plus, link stability weakens, therefore the delay of acquisition service data and cost increase therewith；When vehicle node speed is constant, with
The increase of vehicle node density, the quantity of cloud member is consequently increased, and distribution area is more extensive, therefore obtain service data
Delay and cost all decline therewith.The average retardation that vehicle node obtains service data is 25ms, and average cost is 4.
The simulation parameter of table 1
The invention provides a kind of thinking of the implementation method of vehicle-mounted cloud, the method and approach of the technical scheme are implemented
A lot, described above is only the preferred embodiment of the present invention, it is noted that come for those skilled in the art
Say, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should be regarded as
Protection scope of the present invention.Each component part being not known in the present embodiment can use prior art to be realized.
Claims (8)
1. a kind of implementation method of vehicle-mounted cloud, it is characterised in that vehicle-mounted net includes access node and the class node of vehicle node two, two
Track between individual access node constitutes vehicle-mounted cloud domain；One access node belongs to more than one vehicle-mounted cloud domain, access node
An IPv6 address is equipped with each affiliated vehicle-mounted cloud domain；Data in vehicle-mounted cloud only have effective in vehicle-mounted cloud domain
Property；
The unicast address of vehicle node includes two parts：Part I is vehicle-mounted cloud domain ID, and it is global route prefix, Wei Yibiao
Know a vehicle-mounted cloud domain, the home address or the vehicle-mounted cloud domain ID of Care-of Address obtained in a vehicle-mounted cloud domain is all identical,
Its value is equal to the vehicle-mounted cloud domain ID of access node in identical vehicle-mounted cloud domain；Part II vehicle node ID, its unique mark one
Vehicle node in vehicle-mounted cloud domain, it is made up of access node ID and inside ID, one access section of access node ID unique marks
Point, with network uniqueness in vehicle-mounted net, internal ID distributes to vehicle node by the access node ID access nodes identified, because
This vehicle node ID has uniqueness in vehicle-mounted cloud domain；Vehicle node often passes through an access node, then it represents that it will enter
One new vehicle-mounted cloud domain, now, the vehicle node obtain the vehicle-mounted of new vehicle-mounted cloud domain from the access node passed through
Cloud domain ID, access node ID and inside ID, and constitute the Care-of Address in new vehicle-mounted cloud domain；
In vehicle-mounted cloud domain, each services provided service data by data ID unique marks；Vehicle node uses data
Address acquisition is a kind of to service the service data provided：One data address includes two parts, and Part I is data ID, uniquely
A kind of service data for servicing and providing is provided；Vehicle in Part II vehicle node ID, the vehicle-mounted cloud domain of its unique mark one
Node, it is made up of access node ID and inside ID, one access node of access node ID unique marks, with vehicle-mounted net Intranet
Network uniqueness, internal ID distributes to vehicle node by the access node ID access nodes identified；
Access node preserves more than one tables of data, and tables of data table name is data ID, and each list item includes two domains：One domain
It is vehicle node ID, another domain is life span；
Vehicle-mounted cloud is carried in the vehicle-mounted communication for utilizing vehicle-mounted net on the net and provides service, and the vehicle-mounted cloud is by first node and cloud member's structure
Into first node and cloud member are vehicle nodes, and each first node preserves a cloud membership table, and each list item includes two domains：
One domain is the vehicle node ID of cloud member, and another domain is the resource that cloud member can be provided.
2. the implementation method of vehicle-mounted cloud according to claim 1, it is characterised in that the length of data address is less than vehicle section
The length of the unicast address of point, vehicle node distinguishes the unicast address of data address and vehicle node by address size.
3. the implementation method of vehicle-mounted cloud according to claim 1, it is characterised in that the unicast address length of vehicle node it
With for 128 bits, it is [64,112] that the vehicle-mounted cloud domain ID length in unicast address, which is set interval, and the length of data address is less than
128 bits.
4. the implementation method of vehicle-mounted cloud according to claim 1, it is characterised in that when a vehicle node V1 is ready to pass through
When running application program offer service data, oneself is labeled as the first node of vehicle-mounted cloud by it, is then created according to following processes
Vehicle-mounted cloud：
Step 101：Start；
Step 102：Vehicle node V1 broadcast resource request messages, the source address of resource request message load is vehicle node ID,
The load of resource request is broadcasting area parameter h initial value and the type of request resource；Resource request message often broadcasts one
Secondary, range parameter h successively decreases 1；
Step 103：Neighbours' vehicle node is received after resource request message, is returned if the resource that it has vehicle node V1 requests
A resource response message is returned, resource response message load can provide the type of resource for it, and neighbours' vehicle node will be broadcasted
Range parameter h successively decreases 1, then judges whether broadcasting area parameter h is more than 1, if greater than 0, then continuing to broadcast the resource please
Message is sought, the resource request message is otherwise abandoned；
Step 104：Vehicle node V1 detects the resource response message of all returns, and judges to return to the money in resource response message
Whether Source Type can meet the service requirement of application program, if can meet, and carry out step 106, otherwise carry out step 105；
Step 105：Vehicle node V1 increase broadcasting area parameters h initial value, return to step 102；
Step 106：The node for returning to resource response message is added to cloud membership table by vehicle node V1, and is returned to each cloud member
Resource confirmation message is returned, the load of resource confirmation message is the subprogram for the application program run；
Step 107：Cloud member is received after resource confirmation message, and vehicle node V1 is labeled as into first node, and then processing is distributed
Subprogram, and return result to vehicle node V1；
Step 108：The result for the subprogram that vehicle node V1 processing cloud members return simultaneously forms complete service data, Ran Houxiang
Each cloud member unicast sends data sharing message, data sharing Message Payload for the vehicle node V1 service datas provided and
Data ID；The access nodes of vehicle node V1 also simultaneously into the vehicle-mounted cloud domain in place send tables of data and create message, tables of data wound
It is the data ID and vehicle node ID of all cloud members to build Message Payload；
Step 109：Cloud member is received after data sharing message, preserves service data and data in data sharing Message Payload
ID；Access node receives tables of data and created after message, sets up a tables of data, the entitled data ID of the table, in the table for
The life span that vehicle node V1 and each cloud member increase in a list item, list item is set to maximum；
Step 110：Terminate.
5. the implementation method of vehicle-mounted cloud according to claim 4, it is characterised in that broadcasting area parameter h maximum is not
More than 10.
6. the implementation method of vehicle-mounted cloud according to claim 4, it is characterised in that the life span in tables of data list item is set
Maximum is set to no more than 120 minutes.
7. the implementation method of vehicle-mounted cloud according to claim 1, it is characterised in that when a vehicle node V1 passes through one
Show that it will enter a new vehicle-mounted cloud domain VCD2 from current vehicle-mounted cloud domain VCD1 during access node；If vehicle node V1 is
When the cloud member that data ID is C1 is provided in vehicle-mounted cloud domain VCD1, vehicle node V1 is by nullifying cloud member identities during access node
Vehicle-mounted cloud domain VCD2 tables of data is obtained simultaneously, is comprised the following steps：
Step 201：Start；
Step 202：Access node is received after vehicle node V1 beacon frame, and car is judged according to vehicle node V1 move angle
Node V1 is travelled from vehicle-mounted cloud domain VCD1 to vehicle-mounted cloud domain VCD2, and access node deletes car from table name for C1 tables of data
Node V1, and data-message is sent to vehicle node V1, data-message load is all tables of data in vehicle-mounted cloud domain VCD2；
Step 203：Vehicle node V1 is received after data-message, records tables of data all in vehicle-mounted cloud domain VCD2；
Step 204：Terminate.
8. the implementation method of vehicle-mounted cloud according to claim 4, it is characterised in that when vehicle node V5 passes through an access
When node enters a new vehicle-mounted cloud domain VCD1 from current vehicle-mounted cloud domain, vehicle node V5 obtains vehicle-mounted cloud by access node
Domain VCD1 tables of data；
Vehicle node V5 passes through service datas of following Procedure Acquisition data ID for C1：
Step 301：Start；
Step 302：Vehicle node V5 selection life span most long vehicle node V2 in table name is C1 tables of data, while structure
A data address is built, the vehicle node ID of data address is vehicle node V2 vehicle node ID, and data ID is C1, then structure
Build a data request information, data request information destination address is the address date newly built, last vehicle node V5 is by structure
The data request information built is sent to the next-hop node that destination node is vehicle node V2；
Step 303：Next-hop node is received after data request information, if it is access node or has been detached from vehicle-mounted cloud domain
VCD1, then abandon the message, carries out step 309, otherwise performs step 304；
Step 304：The data ID for the destination address that next-hop node passes through data request information judges that vehicle node V5 needs to obtain
Fetch according to the service data that ID is C1, if next-hop node can provide the service data that data ID is C1, then perform step
Rapid 306, otherwise perform step 305；
Step 305：It is vehicle node V2's that data request information is sent to destination node by next-hop node according to routing iinformation
Next-hop node, return to step 303；
Step 306：Next-hop node returns to a data response message to vehicle node V5, and the load of data response message is data
ID is C1 service data；
Step 307：Vehicle node V5 is received after data response message, preserves the service data that data ID is C1, and save to access
Point, which is sent, adds cloud message, and it is the data ID that this step is preserved to add cloud Message Payload；
Step 308：Access node is received after addition cloud message, and vehicle section is increased in table name is data ID C1 tables of data
Point V5 list item, life span is set to maximum；
Step 309：Terminate；
In said process, if vehicle node V2 is departing from vehicle-mounted cloud domain VCD1 and in vehicle node V5 to vehicle node V2 road
There is no intermediate node to provide the service data that data ID is C1 on path, then vehicle node V5 is in the number that table name is C1
It is C1's according to reselecting a life span most long vehicle node in table and performing step 301~step 309 to obtain data ID
Service data.
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| CN103269478A (en) * | 2013-05-17 | 2013-08-28 | 南京邮电大学 | Rapid broadcasting method based on position information in vehicular network |
| CN104270461A (en) * | 2014-10-20 | 2015-01-07 | 常熟理工学院 | Car network implementation method |
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| CN103269478A (en) * | 2013-05-17 | 2013-08-28 | 南京邮电大学 | Rapid broadcasting method based on position information in vehicular network |
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