CN104717307A - Implementation method of vehicle-mounted cloud communication - Google Patents
Implementation method of vehicle-mounted cloud communication Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
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Abstract
The invention discloses an implementation method of vehicle-mounted cloud communication. A vehicle-mounted cloud is constructed on a vehicle-mounted network; the vehicle-mounted network comprises access nodes and a vehicle node, and one access node is uniquely identified by a geographic coordinate (x, y); the geographic coordinate of each access node has network uniqueness; and the vehicle node has a route function and realizes communication with an IPv6 internet by the nearest access node. The implementation method disclosed by the invention has the advantages that service data can be acquired from a nearest cloud member in a unicast mode, the delaying and the cost for acquiring the service data are reduced, and the service quality is improved. The implementation method can be applied in the fields of road condition monitoring and vehicle management and the like and has a wide application prospect.
Description
Technical field
The present invention relates to a kind of automobile wireless communication network implementation method, the implementation method of in particular a kind of vehicle-mounted cloud communication.
Background technology
Vehicle-mounted cloud to be based upon on vehicle-mounted net and can to provide a kind of service mode of local service.In recent years, vehicle-mounted cloud is devoted in a lot of research work, to enable vehicle drive people quick obtaining network service.Along with the development of vehicle-mounted network technology, vehicle-mounted cloud can become a kind of pattern providing service future.
At present, the implementation pattern of vehicle-mounted cloud realizes by broadcasting, therefore postpone and cost all larger, reduce network service performance.Therefore, how reducing vehicle-mounted cloud provides the delay of service and cost to become the hot issue of Recent study.
Summary of the invention
Goal of the invention: technical problem to be solved by this invention is for the deficiencies in the prior art, provides a kind of implementation method of vehicle-mounted cloud communication.
Technical scheme: the implementation method that the invention discloses a kind of vehicle-mounted cloud communication, described vehicle-mounted cloud is structured on vehicle-mounted net, and described vehicle-mounted net comprises access node and vehicle node, and an access node is by geographical coordinate (x, y) unique identification; The geographical coordinate of each access node has network uniqueness; Described vehicle node has routing function, and vehicle node realizes the communication with IPv6 the Internet by nearest access node;
Described vehicle-mounted cloud is made up of an access node and more than one vehicle node, and vehicle node is vehicle-mounted cloud member;
An access node forms a subnet with all vehicle node realizing communicating by oneself and IPv6 the Internet, and vehicle-mounted net is made up of more than one subnet;
The unicast address structure of access node and vehicle node is made up of three parts: Part I is access node ID, it is overall route prefix, unique identification subnet, access node ID is made up of two parts, i.e. the abscissa of access node geographic location and ordinate; Part II is address style, is made up of a bit, when this value is 1, shows that this address is unicast address; Part III is inner ID, and when vehicle node enters a new subnet, this vehicle node is obtained access node ID and inner ID by neighbours' vehicle node or access node and formed the address in new subnet with global uniqueness; Inside ID in the unicast address of access node is 0; The unicast address length of access node and vehicle node is 128 bits, and the length span of access node ID is [64,112];
Access node be stationary nodes for setting up vehicle-mounted cloud, and regularly publish the service data of access node geographic location; Each service data is by data ID unique identification; When vehicle node needs the service data of access node geographic location, data address is adopted to obtain service data; Data address is made up of two parts, and Part I is access node ID, and it is overall route prefix, unique identification subnet, and access node ID is made up of two parts, i.e. the abscissa of access node geographic location and ordinate; Part II is address style, is made up of a bit, when this value is 0, shows that this address is data address; Part III is data ID set, all data ID of service data of its content for obtaining; The length of data ID is decided by the kind number of service data, and the scope that arranges is for [4,8].
In the method for the invention, access node is regularly set up vehicle-mounted cloud and is provided the service data of address position, such as traffic information, temperature information etc.; Access node in each vehicle-mounted cloud and vehicle-mounted cloud member preserve a service data table, in order to record the service data that the vehicle-mounted cloud in place provides, each list item in this service data table comprises four territories: data ID, address location coordinate, data content, and life cycle; Wherein address location coordinate is preserve the access node of this list item or the address location coordinate of vehicle-mounted cloud member;
Access node AP1 in subnet A1 creates vehicle-mounted cloud by following process and provides service data:
Step 101: start;
Step 102: access node AP1 broadcasts one and creates cloud message, and this establishment cloud Message Source Address is the unicast address of access node AP1, creates the data ID set of all service datas that cloud Message Payload provides for created vehicle-mounted cloud;
Step 103: after the vehicle node in subnet A1 receives and creates cloud message, at least one service data judging oneself whether can provide access node AP1 and ask, if so, carry out step 104, otherwise carry out step 105:
Step 104: vehicle node returns cloud member message to access node AP1, cloud member Message Source Address is the unicast address of vehicle node oneself, the geographical position coordinates that cloud member Message Payload is vehicle node oneself and the service data that can provide; Return step 102;
Step 105: vehicle node forwards and creates cloud message;
Step 106: after access node AP1 waits for the scheduled time, arrange all cloud member message received, then service data table is created, this service data table table name is named with the access node ID of access node AP1, then the service data in cloud member message is joined in service data table, and sending a data sharing message to each cloud member, data sharing Message Payload is described service data table;
Step 107: after cloud member receives the data sharing message of access node, preserve service data table, table name is constant;
Step 108: terminate;
In step 106, the scheduled time is set to the delay that subnet diameter is multiplied by communication one jumping;
The life span of the list item in service data table crosses after date, and corresponding list item is deleted automatically from service data table;
After access node AP1 detects entry expiration, re-create vehicle-mounted cloud.
By said process, access node AP1 and all cloud members can provide the service data of access node AP1 address position, such as traffic information, temperature information etc.
In the method for the invention, when a vehicle node V6 needs the service data obtaining access node AP1 address position coordinates (x1, y1), this vehicle node adopts data address to obtain required service data:
Step 201: start;
Step 202: vehicle node V6 builds data address, access node ID is the access node ID of access node AP1, address style is 0, data ID set is the data ID set that vehicle node V6 needs the service data obtained, such as 1 and 2, then vehicle node V6 builds data request information, data request information source address is the unicast address of vehicle node V6, destination address is the data address built, and according to the geographical position of access node AP1 and routing table information, data request information is forwarded to next-hop node;
Step 203: after next-hop node receives data request information, judge oneself whether to have the service data table named with the access node ID of access node AP1 and the list item of this service data table all data that vehicle node V6 can be provided to apply for, if, then carry out step 204, otherwise carry out step 205;
Step 204: next-hop node is to vehicle node V6 return data response message, data response message destination address is the unicast address of vehicle node V6, source address is the unicast address of next-hop node, the service data that the load of data response message is applied for for vehicle node V6, namely table name is the corresponding list item of the service data table of the access node ID name of access node AP1, carry out step 206;
Step 205: data request information, according to the geographical position of access node AP1 and routing table information, is forwarded to down hop by next-hop node, returns step 203;
After step 206: vehicle node V6 receives data response message, preserve the service data obtained, then create service data table, this service data table table name is named with the access node ID of access node AP1, then joins in service data table by the service data of acquisition;
Step 207: terminate;
In said process, after vehicle node V6 obtains the service data of access node AP1, become cloud member, geographical position can be provided to be all or part of service data of access node AP1; Situation the worst in said process is that vehicle node V6 obtains data response message from access node AP1, i.e. service data, thus guarantees the success rate obtaining service data.
By said process, the member of the vehicle-mounted cloud created by access node AP1 can spread all over whole vehicle-mounted net in the life cycle of service data table, for guaranteeing that vehicle node can the service data of quick obtaining;
When the life span of all list items of the service data table of cloud member all crosses after date, this service data table of cloud member deletion, nullifies the identity of cloud member simultaneously;
Said process can guarantee the service data required for node acquisition that vehicle node is nearest from office, the worst situation is that access node AP1 is to vehicle node V6 return data response message, therefore effectively ensure that service quality, also improve the success rate obtaining data.
The mode that the present invention replaces broadcast by clean culture realizes vehicle-mounted cloud, thus reduces delay and cost that vehicle-mounted cloud provides service, thus effectively increases network service performance.
Beneficial effect: the implementation method that the invention provides a kind of vehicle-mounted cloud communication, vehicle node can obtain service data from nearest cloud member with mode of unicast by vehicle-mounted cloud implementation method provided by the present invention, shorten the delay and cost that obtain service data, improve service quality, the present invention can be applicable to the fields such as road conditions monitoring, vehicle management, is with a wide range of applications.
Accompanying drawing explanation
To do the present invention below in conjunction with the drawings and specific embodiments and further illustrate, above-mentioned and/or otherwise advantage of the present invention 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 vehicle-mounted cloud schematic flow sheet of establishment of the present invention.
Fig. 5 is the schematic flow sheet of acquisition service data of the present invention.
Embodiment:
The invention provides a kind of implementation method of vehicle-mounted cloud communication, vehicle node can obtain service data from nearest cloud member with mode of unicast by vehicle-mounted cloud implementation method provided by the present invention, shorten the delay and cost that obtain service data, improve service quality, the present invention can be applicable to the fields such as road conditions monitoring, vehicle management, is with a wide range of applications.
Fig. 1 is vehicle-mounted cloud architectural schematic of the present invention.Described vehicle-mounted cloud is structured on vehicle-mounted net, and described vehicle-mounted net comprises access node 1 and vehicle node 2, access node 1 by geographical coordinate (x, y) unique identification; The geographical coordinate of each access node 1 has network uniqueness; Described vehicle node 2 has routing function, and vehicle node 2 realizes the communication with IPv6 the Internet by nearest access node 1; Described vehicle-mounted cloud is made up of more than an access node 1 and one vehicle node 2, and vehicle node 2 is vehicle-mounted cloud member; An access node 1 forms a subnet 3 with all vehicle node 2 realizing communicating by oneself and IPv6 the Internet, and vehicle-mounted net is made up of more than one subnet 3.
Fig. 2 is unicast address structural representation of the present invention.The unicast address structure of access node and vehicle node is made up of three parts: Part I is access node ID, it is overall route prefix, unique identification subnet, access node ID is made up of two parts, i.e. the abscissa of access node geographic location and ordinate; Part II is address style, is made up of a bit, when this value is 1, shows that this address is unicast address; Part III is inner ID, and when vehicle node enters a new subnet, this vehicle node is obtained access node ID and inner ID by neighbours' vehicle node or access node and formed the address in new subnet with global uniqueness; Inside ID in the unicast address of access node is 0.The unicast address length of access node and vehicle node is 128 bits, and the length span of access node ID is [64,112].
Fig. 3 is data address structural representation of the present invention.Access node be stationary nodes for setting up vehicle-mounted cloud, and regularly publish the service data of access node geographic location; Each service data is by data ID unique identification; When vehicle node needs the service data of access node geographic location, data address is adopted to obtain service data; Data address is made up of two parts, and Part I is access node ID, and it is overall route prefix, unique identification subnet, and access node ID is made up of two parts, i.e. the abscissa of access node geographic location and ordinate; Part II is address style, is made up of a bit, when this value is 0, shows that this address is data address; Part III is data ID set, all data ID of service data of its content for obtaining.The length of data ID is decided by the kind number of service data, and the scope that arranges is for [4,8].
Fig. 4 is the vehicle-mounted cloud schematic flow sheet of establishment of the present invention.Access node is regularly set up vehicle-mounted cloud and is provided the service data of address position, such as traffic information, temperature information etc.; Access node in each vehicle-mounted cloud and vehicle-mounted cloud member preserve a service data table, in order to record the service data that the vehicle-mounted cloud in place provides, each list item in this service data table comprises four territories: data ID, address location coordinate, data content, and life cycle; Wherein address location coordinate is preserve the access node of this list item or the address location coordinate of vehicle-mounted cloud member;
Access node AP1 in subnet A1 creates vehicle-mounted cloud by following process and provides service data:
Step 101: start;
Step 102: access node AP1 broadcasts one and creates cloud message, and this establishment cloud Message Source Address is the unicast address of access node AP1, creates the data ID set of all service datas that cloud Message Payload provides for created vehicle-mounted cloud;
Step 103: after the vehicle node in subnet A1 receives and creates cloud message, at least one service data judging oneself whether can provide access node AP1 and ask, if so, carry out step 104, otherwise carry out step 105:
Step 104: vehicle node returns cloud member message to access node AP1, cloud member Message Source Address is the unicast address of vehicle node oneself, the geographical position coordinates that cloud member Message Payload is vehicle node oneself and the service data that can provide; Return step 102.
Step 105: vehicle node forwards and creates cloud message;
Step 106: after access node AP1 waits for the scheduled time, arrange all cloud member message received, then service data table is created, this service data table table name is named with the access node ID of access node AP1, then the service data in cloud member message is joined in service data table, and sending a data sharing message to each cloud member, data sharing Message Payload is described service data table;
Step 107: after cloud member receives the data sharing message of access node, preserve service data table, table name is constant;
Step 108: terminate;
In step 106, the scheduled time is set to the delay that subnet diameter is multiplied by communication one jumping;
The life span of the list item in service data table crosses after date, and corresponding list item is deleted automatically from service data table;
After access node AP1 detects entry expiration, re-create vehicle-mounted cloud.
By said process, access node AP1 and all cloud members can provide the service data of access node AP1 address position, such as traffic information, temperature information etc.
Fig. 5 is the schematic flow sheet of acquisition service data of the present invention.When a vehicle node V6 needs the service data obtaining access node AP1 address position coordinates (x1, y1), this vehicle node adopts data address to obtain required service data:
Step 201: start;
Step 202: vehicle node V6 builds data address, access node ID is the access node ID of access node AP1, address style is 0, data ID set is the data ID set that vehicle node V6 needs the service data obtained, such as 1 and 2, then vehicle node V6 builds data request information, data request information source address is the unicast address of vehicle node V6, destination address is the data address built, and according to the geographical position of access node AP1 and routing table information, data request information is forwarded to next-hop node;
Step 203: after next-hop node receives data request information, judge oneself whether to have the service data table named with the access node ID of access node AP1 and the list item of this service data table all data that vehicle node V6 can be provided to apply for, if, then carry out step 204, otherwise carry out step 205;
Step 204: next-hop node is to vehicle node V6 return data response message, data response message destination address is the unicast address of vehicle node V6, source address is the unicast address of next-hop node, the service data that the load of data response message is applied for for vehicle node V6, namely table name is the corresponding list item of the service data table of the access node ID name of access node AP1, carry out step 206;
Step 205: data request information, according to the geographical position of access node AP1 and routing table information, is forwarded to down hop by next-hop node, returns step 203;
After step 206: vehicle node V6 receives data response message, preserve the service data obtained, then create service data table, this service data table table name is named with the access node ID of access node AP1, then joins in service data table by the service data of acquisition;
Step 207: terminate;
In said process, after vehicle node V6 obtains the service data of access node AP1, become cloud member, geographical position can be provided to be all or part of service data of access node AP1;
By said process, the member of the vehicle-mounted cloud created by access node AP1 can spread all over whole vehicle-mounted net in the life cycle of service data table, for guaranteeing that vehicle node can the service data of quick obtaining;
When the life span of all list items of the service data table of cloud member all crosses after date, this service data table of cloud member deletion, nullifies the identity of cloud member simultaneously;
Said process can guarantee the service data required for node acquisition that vehicle node is nearest from office, the worst situation is that access node AP1 is to vehicle node V6 return data response message, therefore effectively ensure that service quality, also improve the success rate obtaining 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 as follows: when vehicle-mounted cloud number of members is constant, along with the increase of lane length, and the delay and the cost that obtain service data increase thereupon; When lane length is constant, along with the increase of vehicle-mounted cloud number of members,
The distribution area of vehicle-mounted cloud member is more extensive, and the delay and the cost that therefore obtain service data decline all thereupon.The average retardation that vehicle node obtains service data is 30ms, and average cost is 5.5.
Table 1 simulation parameter
The invention provides the thinking of the implementation method of vehicle-mounted cloud communication; the method and access of this technical scheme of specific implementation is a lot; the above is only the preferred embodiment of the present invention; should be understood that; for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.The all available prior art of each component part not clear and definite in the present embodiment is realized.
Claims (10)
1. an implementation method for vehicle-mounted cloud communication, it is characterized in that, described vehicle-mounted cloud is structured on vehicle-mounted net, and described vehicle-mounted net comprises access node and vehicle node, and an access node is by geographical coordinate (x, y) unique identification; The geographical coordinate of each access node has network uniqueness; Described vehicle node has routing function, and vehicle node realizes the communication with IPv6 the Internet by nearest access node;
Described vehicle-mounted cloud is made up of an access node and more than one vehicle node, and vehicle node is vehicle-mounted cloud member;
An access node forms a subnet with all vehicle node realizing communicating by oneself and IPv6 the Internet, and vehicle-mounted net is made up of more than one subnet;
The unicast address structure of access node and vehicle node is made up of three parts: Part I is access node ID, it is overall route prefix, unique identification subnet, access node ID is made up of two parts, i.e. the abscissa of access node geographic location and ordinate; Part II is address style, is made up of a bit, when this value is 1, shows that this address is unicast address; Part III is inner ID;
Access node be stationary nodes for setting up vehicle-mounted cloud, and regularly publish the service data of access node geographic location; Each service data is by data ID unique identification; When vehicle node needs the service data of access node geographic location, data address is adopted to obtain service data; Data address is made up of two parts, and Part I is access node ID, and it is overall route prefix, unique identification subnet, and access node ID is made up of two parts, i.e. the abscissa of access node geographic location and ordinate; Part II is address style, is made up of a bit, when this value is 0, shows that this address is data address; Part III is data ID set, all data ID of service data of its content for obtaining.
2. the implementation method of vehicle-mounted cloud communication according to claim 1, it is characterized in that, when vehicle node enters a new subnet, this vehicle node is obtained access node ID and inner ID by neighbours' vehicle node or access node and is formed the address in new subnet with global uniqueness; Inside ID in the unicast address of access node is 0.
3. the implementation method of vehicle-mounted cloud communication according to claim 1, it is characterized in that, the unicast address length of access node and vehicle node is 128 bits, and the length span of access node ID is [64,112].
4. the implementation method of vehicle-mounted cloud communication according to claim 1, it is characterized in that, the length of data ID is decided by the kind number of service data, and the scope that arranges is for [4,8].
5. the implementation method of vehicle-mounted cloud communication according to claim 1, it is characterized in that, access node is regularly set up vehicle-mounted cloud and is provided the service data of address position; Access node in each vehicle-mounted cloud and vehicle-mounted cloud member preserve a service data table, in order to record the service data that the vehicle-mounted cloud in place provides, each list item in this service data table comprises four territories: data ID, address location coordinate, data content, and life cycle; Wherein address location coordinate is preserve the access node of this list item or the address location coordinate of vehicle-mounted cloud member.
6. the implementation method of vehicle-mounted cloud communication according to claim 1, it is characterized in that, the access node AP1 in subnet A1 creates vehicle-mounted cloud by following process and provides service data:
Step 101: start;
Step 102: access node AP1 broadcasts one and creates cloud message, and this establishment cloud Message Source Address is the unicast address of access node AP1, creates the data ID set of all service datas that cloud Message Payload provides for created vehicle-mounted cloud;
Step 103: after the vehicle node in subnet A1 receives and creates cloud message, at least one service data judging oneself whether can provide access node AP1 and ask, if so, carry out step 104, otherwise carry out step 105:
Step 104: vehicle node returns cloud member message to access node AP1, cloud member Message Source Address is the unicast address of vehicle node oneself, the geographical position coordinates that cloud member Message Payload is vehicle node oneself and the service data that can provide; Return step 102;
Step 105: vehicle node forwards and creates cloud message;
Step 106: after access node AP1 waits for the scheduled time, arrange all cloud member message received, then service data table is created, this service data table table name is named with the access node ID of access node AP1, then the service data in cloud member message is joined in service data table, and sending a data sharing message to each cloud member, data sharing Message Payload is described service data table;
Step 107: after cloud member receives the data sharing message of access node, preserve service data table, table name is constant;
Step 108: terminate;
In step 106, the scheduled time is set to the delay that subnet diameter is multiplied by communication one jumping;
The life span of the list item in service data table crosses after date, and corresponding list item is deleted automatically from service data table;
After access node AP1 detects entry expiration, re-create vehicle-mounted cloud.
7. the implementation method of vehicle-mounted cloud communication according to claim 6, is characterized in that, when a vehicle node V6 needs to obtain access node AP1 address position coordinates (x
1, y
1) service data time, this vehicle node adopt data address obtain required service data:
Step 201: start;
Step 202: vehicle node V6 builds data address, access node ID is the access node ID of access node AP1, address style is 0, data ID set is the data ID set that vehicle node V6 needs the service data obtained, then vehicle node V6 builds data request information, data request information source address is the unicast address of vehicle node V6, destination address is the data address built, and according to the geographical position of access node AP1 and routing table information, data request information is forwarded to next-hop node;
Step 203: after next-hop node receives data request information, judge oneself whether to have the service data table named with the access node ID of access node AP1 and the list item of this service data table all data that vehicle node V6 can be provided to apply for, if, then carry out step 204, otherwise carry out step 205;
Step 204: next-hop node is to vehicle node V6 return data response message, data response message destination address is the unicast address of vehicle node V6, source address is the unicast address of next-hop node, the service data that the load of data response message is applied for for vehicle node V6, namely table name is the corresponding list item of the service data table of the access node ID name of access node AP1, carry out step 206;
Step 205: data request information, according to the geographical position of access node AP1 and routing table information, is forwarded to down hop by next-hop node, returns step 203;
After step 206: vehicle node V6 receives data response message, preserve the service data obtained, then create service data table, this service data table table name is named with the access node ID of access node AP1, then joins in service data table by the service data of acquisition;
Step 207: terminate.
8. the implementation method of vehicle-mounted cloud communication according to claim 7, is characterized in that, after vehicle node V6 obtains the service data of access node AP1, become cloud member, and geographical position can be provided to be all or part of service data of access node AP1.
9. the implementation method of vehicle-mounted cloud communication according to claim 7, it is characterized in that, the member of the vehicle-mounted cloud created by access node AP1 can spread all over whole vehicle-mounted net in the life cycle of service data table, for guaranteeing that vehicle node can the service data of quick obtaining.
10. the implementation method of vehicle-mounted cloud communication according to claim 7, is characterized in that, when the life span of all list items of the service data table of cloud member all crosses after date, this service data table of cloud member deletion, nullifies the identity of cloud member simultaneously.
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