CN106210064B - A kind of extensive remotely-sensed data distribution method of controllable P 2 P based on authorization - Google Patents
A kind of extensive remotely-sensed data distribution method of controllable P 2 P based on authorization Download PDFInfo
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- CN106210064B CN106210064B CN201610555676.6A CN201610555676A CN106210064B CN 106210064 B CN106210064 B CN 106210064B CN 201610555676 A CN201610555676 A CN 201610555676A CN 106210064 B CN106210064 B CN 106210064B
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- 238000009826 distribution Methods 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000013475 authorization Methods 0.000 title claims abstract description 19
- 238000013523 data management Methods 0.000 claims abstract description 48
- 238000007726 management method Methods 0.000 claims abstract description 36
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 238000012550 audit Methods 0.000 claims abstract description 4
- 238000003860 storage Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 5
- 230000004044 response Effects 0.000 claims description 3
- 230000002123 temporal effect Effects 0.000 claims 3
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 3
- 238000012795 verification Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 13
- 238000005516 engineering process Methods 0.000 description 5
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000010200 validation analysis Methods 0.000 description 1
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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
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
- H04L63/102—Entity profiles
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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
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
- H04L67/1074—Peer-to-peer [P2P] networks for supporting data block transmission mechanisms
- H04L67/1078—Resource delivery mechanisms
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Abstract
The invention discloses a kind of extensive remotely-sensed data distribution methods of controllable P 2 P based on authorization, remotely-sensed data is issued including remotely-sensed data owner, remotely-sensed data user downloads remotely-sensed data, three processes of monitoring management of remotely-sensed data management platform, present invention employs the data transmission methods based on P2P, it is convenient for users to use there is no the performance bottleneck that multi-user's downloading causes Resource Server；Entire remote sensing resources are intended to a kind of state of optimization, and remote sensing blocks of files can be uniformly distributed in systems, after avoiding the node for possessing rare blocks of files from leaving system caused by system wither away, effectively extend the life cycle of system；Platform is managed to the identity audit of P2P user terminal and Authority Verification by remotely-sensed data, is avoided remotely-sensed data and is flowed into inappropriate P2P user terminal, ensure that the safety of remotely-sensed data；Remotely-sensed data manager is enhanced to the control ability of data distribution, improves controllable safety in remotely-sensed data distribution procedure.
Description
Technical field
The present invention relates to distributed computing, remotely-sensed data, data distribution information technology fields, and in particular to one kind is based on awarding
The extensive remotely-sensed data distribution method of the controllable P 2 P of power.
Background technique
Remote sensing image technology is increasingly mature, and high-resolution series remote sensing satellite constantly goes up to the air, and remotely-sensed data amount is sharply increasing
It is long.Remotely-sensed data needs to be distributed and share to all types of user after appropriate save, preferably to use remotely-sensed data.
In face of the remotely-sensed data of magnanimity, establish a set of extensive remotely-sensed data dissemination system, for user provide the shared of remotely-sensed data and
Distribution is necessary.
Single remotely-sensed data file size is usually even more big hundreds of million, during data distribution, occupies network
Resource is than more serious, the huge flow pressure of structure paired data the distribution server.Using P2P (Peer-to-Peer) technology, benefit
With the mutual data sharing of client, the above problem can effectively solve.P2P is otherwise known as " point-to-point " technology, in network
Client data are both provided, also downloading data also occupies upstream bandwidth while downlink occupies, and makes full use of that client's is upper
Row bandwidth provides resource for other users, realizes the acceleration and extension of network.To which the task of data distribution is assembled from dependence
The all clients in entire P2P network are expanded in several less data distributing servers.
Traditional P2P technology using completely distributed equity operating mode, it is difficult to realize the control of server-side, and remote sensing number
According to usually distribution is responsible for by some specialized agency, needs to extend the control ability of enhancing server-side in P2P mechanism, can just expire
The empowerment management requirement of sufficient specialized agency, thus it is proposed that a kind of extensive remotely-sensed data distribution of controllable P 2 P based on authorization
Method.
Summary of the invention
The purpose of the present invention is to provide a kind of extensive remotely-sensed data distribution methods of controllable P 2 P based on authorization, with solution
Certainly the problems mentioned above in the background art.
To achieve the above object, the invention provides the following technical scheme: a kind of extensive remote sensing of controllable P 2 P based on authorization
Data distributing method, including remotely-sensed data owner issues remotely-sensed data, remotely-sensed data user downloads remotely-sensed data, remote sensing number
According to three processes of monitoring management of management platform, there are two types of realize mould for the remotely-sensed data resource owner publication data phase
Formula: mode 1: remotely-sensed data owner manages platform by logging in remotely-sensed data, uploads shared remotely-sensed data to remotely-sensed data
Platform is managed, realizes that the distribution of remotely-sensed data is shared；Mode 2: since single remotely-sensed data remote sensing image file size usually exists
Hundreds of million is even more big, for and needs shared number GB limited in network bandwidth or bigger remotely-sensed data, remotely-sensed data resource
Person by remotely-sensed data be uploaded to remotely-sensed data management platform inconvenience, remotely-sensed data resource person can physical copy need it is to be sharing
Remotely-sensed data file realizes that the distribution of remotely-sensed data is shared to remotely-sensed data management platform.
It includes with the next stage that the remotely-sensed data user, which downloads remotely-sensed data, and remotely-sensed data user logs in remotely-sensed data
Platform is managed, searches in the remotely-sensed data publication page and downloads the corresponding specific information of remotely-sensed data and describe file, it is objective to pass through P2P
Download remotely-sensed data in family end.
The realization system of the monitoring management of the remotely-sensed data management platform includes remotely-sensed data information management server, cloud
Storage, seed resource server and tracking server.
Preferably, the implementation process of the mode 1 is as follows:
(1) remotely-sensed data owner logs in remotely-sensed data and manages platform, uploads shared remotely-sensed data；
(2) the remotely-sensed data information management server in remotely-sensed data management platform checks the body of remotely-sensed data owner
Part, permission then receives the remotely-sensed data file uploaded from remotely-sensed data owner after passing through, storage beyond the clouds, while notifying to plant
Child resource server describes file according to the information of remotely-sensed data file generated corresponding data；
(3) the seed resource server publishing information of remotely-sensed data management platform describes file to remotely-sensed data and manages platform
In tracking server；
(4) tracking server in remotely-sensed data management platform receives the information from seed resource server and describes text
Part, and describe according to information the information such as user name and time in file and do Hash variation and generate PassKey to create special letter
Breath description file；
(5) special information is described file and is handed down to seed resource clothes by the tracking server in remotely-sensed data management platform
Business device, and provided in tracking server and file is described by page download remotely-sensed data information；
(6) specific information that seed resource server receives that tracking server is sent describes file, and specifies this special letter
The storage path of remotely-sensed data corresponding to breath description file, provides remote sensing as a permanent Seed for remotely-sensed data demander
Data resource.
Preferably, the implementation process of the mode 2 is as follows:
(1) remotely-sensed data owner directly will by the remotely-sensed data information management server in remotely-sensed data management platform
Need remotely-sensed data storage to be sharing beyond the clouds；
(2) the seed resource server in remotely-sensed data management platform is opened, remote sensing number to be sharing in cloud storage is specified
According to P2P client describes file automatically according to the information of remotely-sensed data file generated corresponding data；
(3) the seed resource server publishing information of remotely-sensed data management platform describes file to remotely-sensed data and manages platform
In tracking server；
(4) tracking server in remotely-sensed data management platform receives the information from seed resource server and describes text
Part, and describe according to information the information such as user name and time in file and do Hash variation and generate PassKey to create special letter
Breath description file；
(5) special information is described file and is handed down to seed resource clothes by the tracking server in remotely-sensed data management platform
Business device, and provided on tracking server and file is described by page download remotely-sensed data information；
(6) specific information that seed resource server receives that tracking server is sent describes file, and specifies this special letter
The storage path of remotely-sensed data corresponding to breath description file, provides remote sensing as a permanent Seed for remotely-sensed data user
Data resource.
Preferably, it is as follows to download remotely-sensed data operating process by the remotely-sensed data user:
(1) remotely-sensed data user logs in remotely-sensed data and manages platform, and remotely-sensed data manages platform validation user identity, mentions
The downloading of file is described for the remotely-sensed data information of authorization, remotely-sensed data user downloads specific information and describes file, P2P client
The automatic starting in end, and request remotely-sensed data seed Peer list message is sent to tracking server；
(2) tracking server communicates again with remotely-sensed data information management server, whether checks remotely-sensed data user
It has permission and downloads this remotely-sensed data, if there is downloading this remotely-sensed data permission, tracking server returns to this remotely-sensed data at random
Neighbor node and seed list directly return to null if tracking server if not downloading this remotely-sensed data permission；
(3) remotely-sensed data user obtains the neighbor node and seed list of this remotely-sensed data from tracking server, with kind
Peer communication in sublist, requests resource, realizes the downloading of remotely-sensed data, if that receive is null, illustrates without under
The right of this remotely-sensed data is carried, then downloading is less than data.
Preferably, the remotely-sensed data information management server is mainly responsible for the information and permission of management remotely-sensed data user
And the request of remotely-sensed data owner's shared data is handled, remotely-sensed data is stored beyond the clouds, and remotely-sensed data user passes through remote sensing number
Real information is filled in remotely-sensed data information management server according to management platform, registers new user, remotely-sensed data system administration people
The authenticity of member's audit registration user information, authorizes Sharing of remote sensing data or remotely-sensed data downloading or Sharing of remote sensing data and downloading
Permission, the remotely-sensed data user for authorizing Share Permissions, which passes through remotely-sensed data and manages platform and upload, shares real-time remotely-sensed data text
Part, and kept records of in information management server, the remotely-sensed data user for authorizing download permission manages platform by remotely-sensed data
It downloads special information and describes file, when using P2P client request data resource, information management server is verified under user
Permission is carried, whether notice tracking server distributes remotely-sensed data seed Peer list.
Preferably, the seed resource server mainly generates information according to the remotely-sensed data in cloud and describes file, will believe
Breath description file is sent to Tracker server, and Tracker server describes user name and time etc. in file according to information
Information, which does Hash variation and generates PassKey, to be created special information and describes file, is issued this specific information and is described file to seed
Resource Server, seed resource server receive specific information and describe file, provide remotely-sensed data as a permanent Seed
Downloading, realize the sharing of remotely-sensed data.
Preferably, it participation node all in the main tracking system of the tracking server and collects and counts these nodes
State and provide inquiry and the remote sensing number of remotely-sensed data resource information so that swap file block is removed in discovery mutually between node
It is believed that the downloading of breath description file, remotely-sensed data demander open remotely-sensed data by P2P client and describe file, connect
Tracker server, Tracker server check client-side information by remotely-sensed data information management server, verify user
Whether have permission and download this remotely-sensed data, if there is permission download remotely-sensed data, then returns to the neighbor node of remotely-sensed data at random
And seed list, if directly return null, if there is permission download remotely-sensed data, client takes from Tracker without permission
Business device gets seed list, communicates with the Peer in seed list, requests remotely-sensed data resource, and irregularly to Tracker
Server communication reports remotely-sensed data resource downloading situation, for the safety of remotely-sensed data, in order to enhance remotely-sensed data management
Platform is to the control ability of P2P client in terms of remotely-sensed data user, in the report resource downloading feelings of response P2P client
Condition, Tracker server incidentally reply specific information and give P2P client, and control P2P client requests resource to seed list,
It realizes that special P 2 P user obtains less than remotely-sensed data, protects the safety of remotely-sensed data information.
Compared with prior art, the beneficial effects of the present invention are: 1, for traditional remotely-sensed data distribution rely on a small number of moneys
Source server and network bandwidth are insufficient, and present invention employs the data transmission methods based on P2P, and there is no multi-user's downloadings to cause
The performance bottleneck of Resource Server；2, remotely-sensed data management platform provides directly publication remotely-sensed data file for Resource Manager,
Or it is autonomously generated the mode that a variety of Sharing of remote sensing data such as publication seed file are distributed, it is convenient for users to use；3, remote sensing
Data management platform uses minimum blocks of files priority principle and blocking algorithm, and entire remote sensing resources are intended to a kind of shape of optimization
State, remote sensing blocks of files can be uniformly distributed in systems, after avoiding the node for possessing rare blocks of files from leaving system caused by system
It withers away, effectively extends the life cycle of system；4, the letter of remotely-sensed data information management server management remotely-sensed data user
Breath and permission manage platform to the identity audit of P2P user terminal and Authority Verification by remotely-sensed data, avoid remotely-sensed data stream
Enter inappropriate P2P user terminal, ensure that the safety of remotely-sensed data；5, directly broadcast and incidentally message are passed through based on tracker
The downloading behavior that can control P2P user terminal enhances remotely-sensed data manager to the control ability of data distribution, supports dividing
During hair, cancel P2P client authorization, forced interruption downloading improves controllable safety in remotely-sensed data distribution procedure.
Detailed description of the invention
Fig. 1 is based on the schematic diagram for authorizing the controllable extensive remotely-sensed data management system of P2P；
Fig. 2 is the schematic diagram that extensive remotely-sensed data manages platform shared data；
Fig. 3 is the schematic diagram that extensive remotely-sensed data manages platform downloading data；
Fig. 4 is Peer relation schematic diagram in extensive remotely-sensed data management system；
Fig. 5 is that most rare piece selects algorithm flow schematic diagram；
Fig. 6 is that remotely-sensed data manages 1 schematic diagram of platform courses P2P user downloading data mode；
Fig. 7 is that remotely-sensed data manages 2 schematic diagram of platform courses P2P user downloading data mode.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that the described embodiment is only a part of the embodiment of the present invention, instead of all the embodiments.Based on this
Embodiment in invention, every other reality obtained by those of ordinary skill in the art without making creative efforts
Example is applied, shall fall within the protection scope of the present invention.
Fig. 1-7 is please referred to, the present invention provides a kind of technical solution: a kind of extensive remote sensing number of controllable P 2 P based on authorization
According to distribution method, including remotely-sensed data owner issues remotely-sensed data, remotely-sensed data user downloads remotely-sensed data, remotely-sensed data
Three parts of monitoring management of platform are managed, there are two types of implementation patterns for the remotely-sensed data resource owner publication data phase:
Mode 1: remotely-sensed data owner manages platform by logging in remotely-sensed data, uploads shared remotely-sensed data to remotely-sensed data management
Platform realizes that the distribution of remotely-sensed data is shared；Mode 2: since single remotely-sensed data remote sensing image file size is usually hundreds of
Million is even more big, will for and needs shared number GB limited in network bandwidth or bigger remotely-sensed data, remotely-sensed data resource person
Remotely-sensed data is uploaded to the inconvenience of remotely-sensed data management platform, and remotely-sensed data resource person can the remote sensing to be sharing of physical copy need
Data file realizes that the distribution of remotely-sensed data is shared to remotely-sensed data management platform；
It includes with the next stage that the remotely-sensed data user, which downloads remotely-sensed data, and remotely-sensed data user logs in remotely-sensed data
Platform is managed, searches in the remotely-sensed data publication page and downloads the corresponding specific information of remotely-sensed data and describe file, it is objective to pass through P2P
Download remotely-sensed data in family end；
The realization system of the monitoring management of the remotely-sensed data management platform includes remotely-sensed data information management server, cloud
Storage, seed resource server and tracking server.
Fig. 1 is the present invention is based on the schematic diagram of the extensive remotely-sensed data management system of the P2P of authorization, which includes three
A part: remotely-sensed data owner, remotely-sensed data manage platform, remotely-sensed data user.Wherein:
Remotely-sensed data owner: being the supplier of remotely-sensed data, shares remotely-sensed data to remotely-sensed data and manages platform.Remote sensing
Information management server verifying user information and permission, handle the sharing request of user in data management.
Remotely-sensed data manages platform: being the core of the extensive remotely-sensed data management system of the P2P the present invention is based on authorization
Part, including remotely-sensed data information management server, cloud storage, seed resource server and tracking server, main verifying are used
The legitimacy and permission at family are responsible for receiving the remotely-sensed data that remotely-sensed data owner shares, automatically generate the information of remotely-sensed data
Meta file is described, is published to that tracking server provides the inquiry of remotely-sensed data for remotely-sensed data user and information describes meta file
Downloading, and provide data resource for seed resource server as permanent Seed.
Remotely-sensed data user: can log in remotely-sensed data management platform, inquire remotely-sensed data information and download corresponding letter
Breath description meta file, passes through client downloads remotely-sensed data.
In the following, will be to core in this system: remotely-sensed data manages platform, is analyzed in conjunction with diagram: remotely-sensed data
Managing platform is made of remotely-sensed data information management server, cloud storage, seed resource server and tracking server.Its
In:
Remotely-sensed data information management server is responsible for managing the information of remotely-sensed data user and permission and handles remotely-sensed data
The request of owner's shared data, stores remotely-sensed data beyond the clouds.Seed resource server is generated according to the remotely-sensed data in cloud
Information describes file, and information is described file and is sent to tracking server, tracking server describes the use in file according to information
The information such as name in an account book and time, which do Hash variation and generate PassKey, to be created special information and describes file, is issued this specific information and is retouched
File is stated to seed resource server.Seed resource server receives specific information and describes file, as a permanent Seed
The downloading of remotely-sensed data is provided, realizes the sharing of remotely-sensed data.All participation nodes in the main tracking system of tracking server
And the state of these nodes is collected and counts, so that swap file block is removed in discovery mutually between node, and provide remotely-sensed data money
The inquiry of source information and remotely-sensed data information describe the downloading of file.Remotely-sensed data demander opens remote sensing by P2P client
Data description file connects tracking server.Tracking server checks client letter by remotely-sensed data information management server
Breath, verifies whether user has permission this remotely-sensed data of downloading, if there is permission download remotely-sensed data, then returns to remotely-sensed data at random
Neighbor node and seed list；If without permission, directly return null.If there is permission download remotely-sensed data, client
Seed list is got from Tracker server, is communicated with the Peer in seed list, requests remotely-sensed data resource, and indefinite
Phase to Tracker server communication, reports remotely-sensed data resource downloading situation.For the safety of remotely-sensed data, in order to enhance
The control ability of P2P client in terms of remotely-sensed data manages platform to remotely-sensed data user, in the report of response P2P client
Resource downloading situation, Tracker server incidentally reply specific information and give P2P client, control P2P client to seed list
Resource is requested, realizes that special P 2 P user obtains less than remotely-sensed data, protects the safety of remotely-sensed data information.
As shown in Fig. 2, being the data sharing schematic diagram of the extensive remotely-sensed data management platform of P2P based on authorization.Specifically
For, remotely-sensed data resource-side shared data the following steps are included:
(1) remotely-sensed data owner logs in remotely-sensed data and manages platform, uploads shared remotely-sensed data；
(2) the remotely-sensed data information management server in remotely-sensed data management platform receives on remotely-sensed data owner
The remotely-sensed data file of biography, storage beyond the clouds, while notifying seed resource server to correspond to number according to remotely-sensed data file generated
According to information file is described；
(3) the seed resource server publishing information of remotely-sensed data management platform describes file to remotely-sensed data and manages platform
In tracking server；
(4) tracking server in remotely-sensed data management platform receives the information from seed resource server and describes text
Part, and describe according to information the information such as user name and time in file and do Hash variation and generate PassKey to create special letter
Breath description file；
(5) special information is described file and is handed down to seed resource clothes by the tracking server in remotely-sensed data management platform
Business device, and provided in tracking server and file is described by page download remotely-sensed data information；
(6) specific information that seed resource server receives that tracking server is sent describes file, and specifies this special letter
The storage path of remotely-sensed data corresponding to breath description file.Remote sensing is provided as a permanent Seed for remotely-sensed data demander
Data resource.
As shown in figure 3, being the data downloading schematic diagram of the extensive remotely-sensed data management platform of P2P based on authorization.Specifically
For, remotely-sensed data resource-side shared data the following steps are included:
(1) remotely-sensed data user downloads specific information and describes file, and P2P client starts automatically, and to follow-up service
Device sends request remotely-sensed data seed Peer list message.
(2) tracking server is communicated with remotely-sensed data information management server, checks whether remotely-sensed data user has the right
Limit downloads this remotely-sensed data, and if there is downloading this remotely-sensed data permission, tracking server returns to the neighbours of this remotely-sensed data at random
Node and seed list；If not downloading this remotely-sensed data permission, null is directly returned if tracking server.
(3) remotely-sensed data user obtains the neighbor node and seed list of this remotely-sensed data from tracking server, with kind
Peer communication in sublist, requests resource, realizes the downloading of remotely-sensed data.If that receive is null, illustrate without under
The right of this remotely-sensed data is carried, then downloading is less than data.
Exist in order to which more intuitive P2P extensive remotely-sensed data dissemination system of the explanation based on authorization can effectively solve remotely-sensed data
The pressure of server is big when distribution is shared, data distribution not in time the disadvantages of, it is extensive the following detailed description of the P2P based on authorization
The process of remotely-sensed data dissemination system shared data.Assuming that this remotely-sensed data is divided into 100 data slots altogether, number is
D1, D2 ... ..., D100 have a user to want to download this remotely-sensed data, and the number of user is respectively U1, U2 ... ..., U100,
Seed information that the information and seed client (number Us) of 100 users provides (including IP address, port numbers, client
End ID, the data slot for having downloaded completion) all on Tracker server, then this 101 back end just constitute
101 Peer nodes in P2P system, relation schematic diagram between any two node as shown in figure 4, can directly be counted
According to exchange.Detailed process is as follows:
After node U1 is connected to Tracker server, discovery only have node Us have data, just at random from node Us under
A data slice D1 is carried, after the completion of node U1 downloading data segment D1, the information of completion is just passed to Tracker service
Device.
After node U2 is connected to Tracker server, downloading data piece D1 is thought, discovery only has node U1, Us to possess number
According to piece D1, just selection is downloaded apart from oneself routing nearest node, after the completion of node U2 downloading data piece D1, also complete
At information pass to Tracker server.
After node U3 is connected to Tracker server, downloading data piece D1 is thought, discovery only has node U1, and U2, Us possess
Data slice D1, just selection is downloaded apart from oneself routing nearest node, after the completion of node U3 downloading data piece D1, also
The information of completion passes to Tracker server.
Data carry out data exchange according to basic law above, realize that multiple users download remotely-sensed data.
It can be seen that from process above and downloading data wanted not necessarily to download from server, it can be by any other
Node is downloaded, and the exchanged form of this data can choose shortest route, greatly shortens the number of turnover of data packet, from
And transmission speed is improved, decrease the pressure of data server.
As shown in figure 5, being that most rare piece used by this remotely-sensed data management platform selects algorithm flow schematic diagram.In user
When downloading remotely-sensed data, force preferentially to download principle using minimum blocks of files.Minimum blocks of files, which preferentially refers to, ties a downloading
For point, when selecting next blocks of files being downloaded, that least file in its neighbor node set is all preferentially selected
Block goes to download, and those relatively large number of blocks of files in systems, downloading of putting behind.In this " minimum preferential plan of blocks of files
Under slightly ", whole system can be intended to a kind of state of optimization, and blocks of files can be uniformly distributed in systems, improve whole system
Performance.And avoid possess rare blocks of files node leave after system caused by system wither away, effectively extend system
Life cycle.The process of minimum blocks of files priority algorithm of the invention is as follows:
Each node obtains each file piece by the availability of the file piece of all nodes being successfully connected of traversal
Availability.When each node possesses the piece, the numerical value of this document piece availability adds one.All node institutes being successfully connected are traversed
After the piece possessed, obtain one have recorded it is all be successfully connected node include the file piece oneself possessed node number this
A array is known as availability array, and the minimum value of this array is then to possess the piece node number in this network, and also representing should
Piece is that this nodes at least possesses.Threshold value, i.e. threshold value=[(100+ are calculated according still further to some proportion by this value
RangePercent) * the piece number minimum value]/100.If each value of this availability array is compared numerical value with threshold value
Less than threshold value, then the piece is marked as rare file piece, is recorded with a file piece availability boolean array.And if minimum
Availability directly sets 999 for minimum availability between 10 to 999, then can set rare for all rare degree,
Node and seed number in the BT network of expression at this time is enough, can any select file piece downloading.
It as shown in Figure 6 and Figure 7, is two kinds of tools for enhancing remotely-sensed data management platform to P2P client downloads data management
The scheme that body is realized.Remotely-sensed data manages control of the platform to P2P client, can be by tracking server, by directly broadcasting
Notice control is realized with incidentally message control two schemes.
Fig. 6 is incidentally message control program, can aperiodically be communicated with Tracker by client when downloading file,
Then, Tracker server incidentally intends obstruction nodal information list ChokePeerList(PeerID, ResourceName,
ResourceHash corresponding P2P client) is given, P2P client blocks corresponding connection according to ChokePeerList, real
Now control is blocked P2P client and obtains remotely-sensed data.
Fig. 7 is direct broadcast notification scheme, one request service of P2P client reserves each first, Tracker server
Before P2P user terminal does not complete remotely-sensed data downloading, special P 2 P client ends relative can be directly pushed to all
Peer in Peer, Peer list receives Tracker notification message, all in accordance with notification message execution, realizes control P2P client
The function of obtaining remotely-sensed data, to guarantee the safety of remotely-sensed data.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (4)
1. a kind of extensive remotely-sensed data distribution method of controllable P 2 P based on authorization, including remotely-sensed data owner issue remote sensing
Data, remotely-sensed data user download three parts of monitoring management of remotely-sensed data, remotely-sensed data management platform, and feature exists
In: there are two types of implementation patterns for the remotely-sensed data resource owner publication data phase: mode 1: remotely-sensed data owner passes through
It logs in remotely-sensed data and manages platform, upload shared remotely-sensed data to remotely-sensed data and manage platform, realize the distribution of remotely-sensed data
It is shared；Mode 2: due to single remotely-sensed data remote sensing image file size usually hundreds of million it is even more big, in Netowrk tape
Width is limited and needs shared number GB or bigger remotely-sensed data, remotely-sensed data resource person that remotely-sensed data is uploaded to remotely-sensed data pipe
The inconvenience of platform, remotely-sensed data resource person can physical copy need remotely-sensed data file to be sharing to put down to remotely-sensed data management
Platform realizes that the distribution of remotely-sensed data is shared；Wherein:
The implementation process of the mode 1 is as follows:
(1) remotely-sensed data owner logs in remotely-sensed data and manages platform, uploads shared remotely-sensed data；
(2) the remotely-sensed data information management server in remotely-sensed data management platform checks the identity of remotely-sensed data owner, power
Limit then receives the remotely-sensed data file uploaded from remotely-sensed data owner after passing through, storage beyond the clouds, while notifying seed to provide
Source server describes file according to the information of remotely-sensed data file generated corresponding data；
(3) the seed resource server publishing information of remotely-sensed data management platform describes file into remotely-sensed data management platform
Tracking server；
(4) tracking server in remotely-sensed data management platform receives the information from seed resource server and describes file, and
User name in file described according to information and temporal information do Hash variation generate key assignments and created according to the key assignments it is special
Information describes file；
(5) special information is described file and is handed down to seed resource service by the tracking server in remotely-sensed data management platform
Device, and provided in tracking server and file is described by page download remotely-sensed data information；
(6) specific information that seed resource server receives that tracking server is sent describes file, and this specific information is specified to retouch
The storage path for stating remotely-sensed data corresponding to file provides remotely-sensed data as a permanent seed for remotely-sensed data demander
Resource；
The implementation process of the mode 2 is as follows:
(1) remotely-sensed data owner directly manages the remotely-sensed data information management server in platform by remotely-sensed data and will need
Shared remotely-sensed data uploads storage beyond the clouds；
(2) the seed resource server in remotely-sensed data management platform is opened, remotely-sensed data to be sharing in cloud storage is specified,
P2P client describes file automatically according to the information of remotely-sensed data file generated corresponding data；
(3) the seed resource server publishing information of remotely-sensed data management platform describes file into remotely-sensed data management platform
Tracking server；
(4) tracking server in remotely-sensed data management platform receives the information from seed resource server and describes file, and
User name in file described according to information and temporal information do Hash variation generate key assignments and created according to the key assignments it is special
Information describes file；
(5) special information is described file and is handed down to seed resource service by the tracking server in remotely-sensed data management platform
Device, and provided on tracking server and file is described by page download remotely-sensed data information；
(6) specific information that seed resource server receives that tracking server is sent describes file, and this specific information is specified to retouch
The storage path for stating remotely-sensed data corresponding to file provides remotely-sensed data as a permanent seed for remotely-sensed data demander
Resource.
2. the extensive remotely-sensed data distribution method of a kind of controllable P 2 P based on authorization according to claim 1, feature exist
In the remotely-sensed data information management server is mainly responsible for the information for managing remotely-sensed data user and permission and handles remote sensing number
According to the request of owner's shared data, remotely-sensed data is stored beyond the clouds, and remotely-sensed data user manages platform by remotely-sensed data and exists
Remotely-sensed data information management server fills in real information, registers new user, and remotely-sensed data system manager audits registration and uses
The authenticity of family information is authorized the permission of Sharing of remote sensing data or remotely-sensed data downloading or Sharing of remote sensing data and downloading, is authorized
The remotely-sensed data user of Share Permissions is managed platform and uploaded by remotely-sensed data shares real-time remotely-sensed data file, and in information
Management server is kept records of, and the remotely-sensed data user for authorizing download permission manages platform by remotely-sensed data and downloads special letter
Breath description file, when using P2P client request data resource, information management server verifies the download permission of user, notice
Whether tracking server distributes remotely-sensed data seed Peer list.
3. the extensive remotely-sensed data distribution method of a kind of controllable P 2 P based on authorization according to claim 1 or 2, special
Sign is that the seed resource server mainly generates information according to the remotely-sensed data in cloud and describes file, and information is described text
Part is sent to Tracker server, and Tracker server describes user name in file according to information and temporal information is Hash
Variation, which generates key assignments and creates special information according to the key assignments, describes file, issues this specific information and describes file to seed money
Source server, seed resource server receive specific information and describe file, provide remotely-sensed data as a permanent seed
Downloading, realizes the sharing of remotely-sensed data.
4. the extensive remotely-sensed data distribution method of a kind of controllable P 2 P based on authorization according to claim 1, feature exist
In, all participation nodes and collection and the state for counting these nodes in the main tracking system of tracking server, so as to
Swap file block is removed in discovery mutually between node, and provides inquiry and the remotely-sensed data information description text of remotely-sensed data resource information
The downloading of part, remotely-sensed data demander open remotely-sensed data by P2P client and describe file, connect Tracker server,
Tracker server checks client-side information by remotely-sensed data information management server, verifies whether user has permission downloading
This remotely-sensed data then returns to the neighbor node and seed list of remotely-sensed data if there is permission download remotely-sensed data at random, if
There is no permission, directly return null, if there is permission download remotely-sensed data, client gets seed from Tracker server
List is communicated with the Peer in seed list, requests remotely-sensed data resource, and is irregularly reported to Tracker server communication
Remotely-sensed data resource downloading situation, for the safety of remotely-sensed data, in order to enhance remotely-sensed data management platform to remotely-sensed data
The control ability of P2P client in terms of user, in the report resource downloading situation of response P2P client, Tracker service
Device incidentally replys specific information and gives P2P client, and control P2P client requests resource to seed list, realizes special P 2 P user
It obtains less than remotely-sensed data, protects the safety of remotely-sensed data information.
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| CN107104956B (en) * | 2017-04-13 | 2019-07-26 | 重庆市环境科学研究院 | A kind of remote sensing distribution method and system based on user's priority |
| CN107404526A (en) * | 2017-07-25 | 2017-11-28 | 桂林电子科技大学 | P2P remotely-sensed data network self-adapting dissemination systems and method based on SDN |
| CN110955731A (en) * | 2019-12-13 | 2020-04-03 | 深圳先进技术研究院 | Multi-source remote sensing big data processing method and device based on Chord ring |
| CN112988816A (en) * | 2021-03-16 | 2021-06-18 | 支付宝(杭州)信息技术有限公司 | Business rule loading method, device and equipment |
| CN113220807A (en) * | 2021-04-01 | 2021-08-06 | 辽宁工程技术大学 | Automatic remote sensing data publishing and online process monitoring method |
| CN113114761B (en) * | 2021-04-12 | 2022-09-20 | 中共陕西省委党校 | Data sharing exchange excitation system and method based on distributed service |
| CN114827137B (en) * | 2022-03-28 | 2024-04-30 | 中国电子科技集团公司第五十四研究所 | Remote sensing data product on-orbit distribution method based on earth observation space cloud service |
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