CN104767796A - Hot resource management method for internet of vehicles based on mobile P2P - Google Patents
Hot resource management method for internet of vehicles based on mobile P2P Download PDFInfo
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Abstract
The invention provides a hot resource management method for an internet of vehicles based on mobile P2P. The method has the actual advantages that hot resources are divided into local hot resources and network hot resources, and the hot degree and the high quality degree of the resources are utilized for judging whether the resources are the hot resources or not; for the characteristic that the resource requirements for the internet of vehicles are correspondingly different if the behaviors and hobbies and interests and the like of terminal nodes are different, the current state that bandwidth resources of vehicles and roadside servers are short in the internet of vehicles is combined, the mobile P2P technology is utilized, the abundant bandwidth resources among the vehicles are fully utilized, therefore, the bandwidth resource shortage of the vehicles and the roadside servers is relieved, and the multimedia application of the terminal nodes is improved.
Description
Technical field
The present invention relates to car networked resources management domain, more specifically, relate to a kind of car based on mobile P 2 P networking hot point resource management method.
Background technology
Magnanimity intelligent transportation data in car networking, in the urgent need to seeking new, information interaction and information processing manner efficiently.P-2-P technology (Peer-to-Peer, P2P) provides the new method of nodes information interaction, makes the source of node acquisition number certificate no longer be limited to existing a few station server, and each node can both obtain data and provide data.P2P is the abbreviation of Peer-to-Peer, i.e. peer-to-peer network technology, is the computing capability and the bandwidth that rely on participant in network, instead of dependence is concentrated on less several station servers as traditional C/S model.Be mainly used in the collaborative of resource to upload and download.Mobile P 2 P is the abbreviation of Mobile Peer-to-Peer, namely moves peer to peer technology, as the term suggests being exactly by the application of P2P technology on mobile terminals, is the fusion of mobile technology and P2P technology.Due to the particularity of mobile environment own, as the connection status of alterable height, shorter network attachment time, unstable network environment, add that plurality of wireless networks coexists, and the special nature of the performance requirement of carrier-class have studied to mobile P 2 P and brings new challenge.
Under car networked environment, due to the difference such as behavior and hobby of terminal node, also can distinguish to some extent accordingly the resource requirement of car networking, so the popular degree of different resource under same environment is different, under car networked environment, some resource can be caused very high by demand, and some resources requirement is very low, and hot point resource is the resource that demand is very high, the multimedia application such as such as current more popular song, video, advertisement, and the effect of multimedia application determines the real experiences effect of user.But, in car networking, the bandwidth resources of vehicle and trackside server are nervous, but the communications bandwidth resources between vehicle and vehicle is abundant, if but adopt traditional C/S model to download, will be all great test to bandwidth sum communication, simultaneously, the efficiency downloaded can reduce greatly, and the real experiences effect of terminal node also can reduce greatly.
Summary of the invention
The invention provides a kind of car based on mobile P 2 P networking hot point resource management method, realize making full use of bandwidth resources abundant between vehicle, alleviate the bandwidth resources anxiety of vehicle and trackside server, the effect of the multimedia application of raising terminal node.
In order to reach above-mentioned technique effect, technical scheme of the present invention is as follows:
A kind of networking of the car based on mobile P 2 P hot point resource management method, wherein the car of mobile P 2 P is networked the terminal node comprising network center, be deployed in the ordinary node in roadside unit RSU or trackside cloud platform and be deployed in board units OBU, ordinary node and network center's wired connection, wired connection between ordinary node, between terminal node and wireless connections between terminal node and ordinary node, comprise the following steps:
S1: obtain network hotspot resource by network center, by assessment resource hot topic degree M and water K and then obtain local hot point resource within the scope of ordinary node, is combined into hot point resource by network hotspot resource and local hot point resource;
S2: the resource information list that this locality has by ordinary node shares to the ordinary node of surrounding, when arbitrary ordinary node receives the resource information list from ordinary node is around shared, this ordinary node integrates existing resource information list in the mode of superposition;
S3: in period of time T, arbitrary ordinary node pushes the IP address information of hot point resource and correspondence thereof to the terminal node entering its coverage, and terminal node connects and downloaded resources to this ordinary node according to IP address information.
Further, described resource hot topic degree M equals the times N of the terminal node unduplicated request downloaded resources in period of time T 0 in ordinary node coverage divided by period of time T, i.e. M=N/T0.
Further, the water K of described resource is represented by the quantity of the integrality of this resource in resource information list and owner, and the integrality of this resource in the resource information list of arbitrary ordinary node is higher or have that the quantity of ordinary node of this resource is more just represents that the water K of this resource is larger.
Further, the process obtaining local hot point resource in described step S1 is as follows:
In period of time T 1, obtain some local resources that popular degree M is greater than or equal to popular bottom valve value M0, this local resource is carried out overall ranking according to the size of water K and popular degree M, choose a front P local resource and become the local hot point resource that in next period of time T 1, ordinary node pushes to terminal node, wherein, the size of M0 is determined by the quantity of the terminal node in ordinary node coverage.
Further, described resource information list comprises resource and deposits list, resource request list and trackside the Resources list, and wherein, resource deposits the IP address information that list comprises resource description field and its correspondence; Resource request list comprises resource description field, click volume, popular degree and water; The IP address information that trackside the Resources list comprises adjacent ordinary node and the resource description field of this locality deposited; Resource deposits the Resources list that list is ordinary node all terminal nodes in whole coverage; Resource request list is the statistics of terminal node to the resource downloading information in whole coverage; Trackside the Resources list is ordinary node to the statistics of the around resource situation of ordinary node.
Further, the detailed process of described step S3 is as follows:
S61: ordinary node pushes hot point resource and corresponding resource description field thereof to the terminal node entered in its coverage, when end node users is selected to obtain certain hot point resource, terminal node obtains the information of respective resources according to pushed resource description field from the Resources list of ordinary node, and information initiates resource download request to all ordinary nodes of resource according to this, ordinary node upgrades resource click volume corresponding in resource request list and the information of popular degree simultaneously;
S62: terminal node is in downloaded resources process, when moving to neighbours' ordinary node coverage from an ordinary node coverage, terminal node is initiated the request of the resource that acquisition is being downloaded to new ordinary node and is enclosed a upper ordinary node information, if current ordinary node has this resource, just send this resource; If no, just connect with a upper ordinary node and obtain this resource concurrence and deliver to terminal node.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
The present invention is divided into local and network hotspot resource two class hot point resource, utilize the popular degree of resource and water to judge resource whether hot point resource, for the difference such as behavior and hobby of terminal node, to the characteristic that the resource requirement of car networking also can be distinguished accordingly to some extent, be combined in car networking, the present situation of the bandwidth resources anxiety of vehicle and trackside server, utilize mobile P 2 P technology, make full use of bandwidth resources abundant between vehicle, alleviate the bandwidth resources anxiety of vehicle and trackside server, improve the real experiences effect of the multimedia application of terminal node.
Accompanying drawing explanation
Fig. 1 is the scene graph applying mobile P 2 P technology in car networking three-tier architecture figure;
Fig. 2 is that hot point resource of the present invention downloads schematic flow sheet.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent;
In order to better the present embodiment is described, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product;
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Below in conjunction with drawings and Examples, technical scheme of the present invention is described further.
Embodiment 1
As shown in Figure 1, the car networking based on mobile P 2 P in the present invention comprises network center, ordinary node and terminal node, and ordinary node is deployed in roadside unit RSU or trackside cloud platform, and terminal node is deployed in board units OBU.Ordinary node and network center's wired connection, connected by cable network between ordinary node, be connected between terminal node and between terminal node with ordinary node by radio communication.Wherein, ordinary node is responsible for caching resource, Content Management, terminal node is carried out to authentication management and provide resource searching service; Terminal node is the requesting party of resource and shares side.
Embodiment based on this framework the inventive method comprises the steps:
1, hot point resource to comprise in the network obtained by network center the hot point resource { Res1 of before rank 10 ... Res10} and the local hot point resource assessed homogeneity resource hot topic degree M and water K within the scope of ordinary node RSU and obtain.Wherein, under the popular degree M >=threshold values M0 condition meeting a certain resource, whether a certain resource becomes local hot point resource is comprehensively determined by the size of the water K of this resource and popular degree M: by obtain local hot point resource be carry out overall ranking according to the size of water K and popular degree M, choose front 20 local hot point resource { Res11 ... the local hot point resource that Res30} pushes to terminal node as ordinary node in next 10S.Wherein, terminal node unduplicated request in 10s that M equals in RSU coverage downloads the times N of homogeneity resource divided by 10, i.e. M=N/10.Wherein, the value of water K and corresponding resource deposit integrality in list and the positive correlation of owner's quantity in resource.The size of M0 is determined by the quantity of OBU in RSU coverage.OBU uploads shared resource information list every 3s to RSU, when RSU receives the shared resource information list from OBU, then upgrades existing resource information in the Resources list with coverage mode.The Resources list comprises resource and deposits list, resource request list and trackside the Resources list, and it deposits in RSU.Wherein, resource deposits the IP address information that list comprises resource description field and its correspondence; Resource request list (table 1 shows) comprises resource description field, click volume, popular degree and water; The IP address information that trackside the Resources list (table 2 shows) comprises adjacent ordinary node and the resource description field of this locality deposited.Resource deposits the Resources list that list is RSU OBU in whole coverage; Resource request list is the statistics of RSU to the resource downloading information in whole coverage, conveniently arranges hot resource; Trackside the Resources list is the statistics of RSU to the resource situation of surrounding neighbours RSU, facilitates the trans-regional downloaded resources of OBU.
The list of table 1 resource request
| Resource name | Click volume | Hot topic degree | Water |
| ResA | N0 | N0/T | K0 |
| ResB | N1 | N1/T | K1 |
| ResC | N2 | N2/T | K2 |
| …… | …… | …… | …… |
| ResM | Nm | Nm/T | Km |
Table 2 trackside the Resources list
| IP 1 | Res A1 | Res A2 | Res A3 | …… | Res An |
| IP 2 | Res B1 | Res B2 | Res B3 | …… | Res Bn |
| …… | …… | …… | …… | …… | …… |
| IP M | Res M1 | Res M2 | Res M3 | …… | Res Mn |
2, the resource information list that this locality has by ordinary node RSU shares to the RSU of surrounding.When a certain RSU receives the shared resource information list from around RSU, this RSU integrates existing resource-sharing information around in the mode of superposition.
3, at 10s, ordinary node RSU0 pushes hot point resource { Res1 to terminal node OBU0 ... Res30 } and the IP address information { ip0 of correspondence ... ipn }, OBU0 is according to { ip0 ... ipn } connect and downloaded resources to resource segment owner.Its detailed implementation process is as follows, as shown in Figure 2:
A.RSU0 pushes { Res1 to entering OBU0 ... Res30 }.When OBU0 selects to obtain certain hot resource Resi, wherein
, OBU0 obtains the list information { ip0 of respective resources according to Resi from the Resources list of RSU0 ... ipn}, wherein n<m, and { ip0 according to this ... ipn} initiates resource download request to Resource Owner.RSU0 upgrades Ni and Mi of Resi in resource request list simultaneously.
B.OBU0 is in download Resi process, and when moving to neighbours' ordinary node RSU1 from RSU0, OBU0 initiates to obtain the Resources list request of downloading to RSU1 and encloses RSU0 information, if RSU1 has the list information of Resi, then replys this list information; If no, then to RSU0 Gains resources list information, and by this information-reply OBU0.
Obviously, the above embodiment of the present invention is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.All any amendments done within the spirit and principles in the present invention, equivalent to replace and improvement etc., within the protection range that all should be included in the claims in the present invention.
Claims (6)
1. the networking of the car based on a mobile P 2 P hot point resource management method, wherein the car of mobile P 2 P is networked the terminal node comprising network center, be deployed in the ordinary node in roadside unit RSU or trackside cloud platform and be deployed in board units OBU, ordinary node and network center's wired connection, wired connection between ordinary node, between terminal node and wireless connections between terminal node and ordinary node, it is characterized in that, comprise the following steps:
S1: obtain network hotspot resource by network center, by assessment resource hot topic degree M and water K and then obtain local hot point resource within the scope of ordinary node, is combined into hot point resource by network hotspot resource and local hot point resource;
S2: the resource information list that this locality has by ordinary node shares to the ordinary node of surrounding, when arbitrary ordinary node receives the resource information list from ordinary node is around shared, this ordinary node integrates existing resource information list in the mode of superposition;
S3: in period of time T, arbitrary ordinary node pushes the IP address information of hot point resource and correspondence thereof to the terminal node entering its coverage, and terminal node connects and downloaded resources to this ordinary node according to IP address information.
2. the networking of the car based on mobile P 2 P hot point resource management method according to claim 1, it is characterized in that, described resource hot topic degree M equals the times N of the terminal node unduplicated request downloaded resources in period of time T 0 in ordinary node coverage divided by period of time T, i.e. M=N/T0.
3. the networking of the car based on mobile P 2 P hot point resource management method according to claim 1, it is characterized in that, the water K of described resource is represented by the quantity of the integrality of this resource in resource information list and owner, and the integrality of this resource in the resource information list of arbitrary ordinary node is higher or have that the quantity of ordinary node of this resource is more just represents that the water K of this resource is larger.
4. the networking of the car based on mobile P 2 P hot point resource management method according to claim 1, it is characterized in that, the process obtaining local hot point resource in described step S1 is as follows:
In period of time T 1, obtain some local resources that popular degree M is greater than or equal to popular bottom valve value M0, this local resource is carried out overall ranking according to the size of water K and popular degree M, choose a front P local resource and become the local hot point resource that in next period of time T 1, ordinary node pushes to terminal node, wherein, the size of M0 is determined by the quantity of the terminal node in ordinary node coverage.
5. the networking of the car based on mobile P 2 P hot point resource management method according to claim 1, it is characterized in that, described resource information list comprises resource and deposits list, resource request list and trackside the Resources list, wherein, resource deposits the IP address information that list comprises resource description field and its correspondence; Resource request list comprises resource description field, click volume, popular degree and water; The IP address information that trackside the Resources list comprises adjacent ordinary node and the resource description field of this locality deposited; Resource deposits the Resources list that list is ordinary node all terminal nodes in whole coverage; Resource request list is the statistics of terminal node to the resource downloading information in whole coverage; Trackside the Resources list is ordinary node to the statistics of the around resource situation of ordinary node.
6. the networking of the car based on mobile P 2 P hot point resource management method according to claim 5, it is characterized in that, the detailed process of described step S3 is as follows:
S61: ordinary node pushes hot point resource and corresponding resource description field thereof to the terminal node entered in its coverage, when end node users is selected to obtain certain hot point resource, terminal node obtains the information of respective resources according to pushed resource description field from the Resources list of ordinary node, and information initiates resource download request to all ordinary nodes of resource according to this, ordinary node upgrades resource click volume corresponding in resource request list and the information of popular degree simultaneously;
S62: terminal node is in downloaded resources process, when moving to neighbours' ordinary node coverage from an ordinary node coverage, terminal node is initiated the request of the resource that acquisition is being downloaded to new ordinary node and is enclosed a upper ordinary node information, if current ordinary node has this resource, just send this resource; If no, just connect with a upper ordinary node and obtain this resource concurrence and deliver to terminal node.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111064997A (en) * | 2018-10-16 | 2020-04-24 | 深圳市云帆加速科技有限公司 | Resource pre-distribution method and device |
| CN111064997B (en) * | 2018-10-16 | 2021-11-16 | 深圳市云帆加速科技有限公司 | Resource pre-distribution method and device |
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| CN112449248A (en) * | 2019-08-28 | 2021-03-05 | 杭州海康威视系统技术有限公司 | Video data on demand method and device and video on demand node |
| CN116405563A (en) * | 2023-06-08 | 2023-07-07 | 湖南快乐阳光互动娱乐传媒有限公司 | Resource acquisition method and system based on point-to-point content distribution network |
| CN116405563B (en) * | 2023-06-08 | 2023-08-18 | 湖南快乐阳光互动娱乐传媒有限公司 | Resource acquisition method and system based on point-to-point content distribution network |
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