CN103825943B - SCORM Standard Coursewares Play System and its implementation based on P2P - Google Patents
SCORM Standard Coursewares Play System and its implementation based on P2P Download PDFInfo
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- CN103825943B CN103825943B CN201410063563.5A CN201410063563A CN103825943B CN 103825943 B CN103825943 B CN 103825943B CN 201410063563 A CN201410063563 A CN 201410063563A CN 103825943 B CN103825943 B CN 103825943B
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Abstract
The invention discloses a kind of SCORM Standard Courseware Play Systems based on P2P, it is characterised in that include：P2P LIST SERVERs, P2P clients, Active plug-in units.Implementation method based on the SCORM Standard Courseware Play Systems of P2P, the present invention is not on the premise of traditional SCORM courseware VODs learning system general frame and user's occupation mode is changed, introduce P2P technologies and solve high concurrent, the problem handled up greatly, solve the online courseware learning system user rapid growth of traditional forms of enterprises SCORM, region disperses, hardware puts into big problem, existing courseware study VOD system is allow to meet the learning demand of enterprise's Web- Based Training rapid growth, improve the quality that courseware is played, reduce corporate training cost input, can be widely applied to other enterprise's Web- Based Trainings.
Description
Technical field
The present invention relates to a kind of program request learning system, and in particular to a kind of SCORM Standard Coursewares program request based on P2P learns
Training system, the invention further relates to a kind of SCORM Standard Coursewares Play System and its implementation based on P2P, the invention belongs to
In field of computer technology.
Background technology
Online courseware study is one of main business in enterprise's Web- Based Training, and traditional courseware is most of being based on
Based on the audio/video multimedia courseware of SCORM standards, existing SCORM courseware VODs mode is issued by streaming media service,
When a broadcasting user increases and during concurrent program request, relatively large load pressure, existing streaming media server and the network bandwidth are produced to system
It is difficult to support preferable service performance.
The content of the invention
To solve the deficiencies in the prior art, it is an object of the invention to provide a kind of SCORM Standard Coursewares based on P2P are broadcast
Place system and its implementation.
In order to realize above-mentioned target, the present invention is adopted the following technical scheme that：
SCORM Standard Courseware Play Systems based on P2P, it is characterised in that include：P2P LIST SERVERs, P2P client
End, Active plug-in units.
The aforesaid SCORM Standard Courseware Play Systems based on P2P, it is characterised in that the P2P clients include：
Segment information synchronization module：For segment information is updated to P2P LIST SERVERs；
Heartbeat link block：Heartbeat packet is sent to P2P LIST SERVERs for timing；
Sectional management module：For managing size starting, the end position of each segmentation；
Exception management module：For processing to the exception that P2P clients are received when P2P is transmitted；
Load balancing module：For load balance process is carried out when P2P LIST SERVERs select source；
The P2P LIST SERVERs include：
Heartbeat and renewal management module：For receiving the heartbeat packet of P2P clients, update terminal resource and possess situation；
Resource request management module：For receiving the request of P2P clients, selecting source to process and generate seed list；
P2P transport modules：For realizing that P2P is transmitted；
The Active plug-in units are carried in courseware webpage, are responsible for the transmission download of P2P clients, webpage closing information.
The implementation method of the aforementioned SCORM Standard Courseware Play Systems based on P2P, it is characterised in that comprise the steps：
Step one：After user clicks on Video Courseware, webpage Active plug-in units blocking streaming media service access request, and to
P2P clients send download request, and the return state of the request that waits for downloads, and when the state of return is successfully, start P2P services
Pattern, is otherwise streaming media service pattern；
Step 2：After P2P clients receive plug-in request, local P2P clients send to P2P LIST SERVERs and download
Seed file is asked, and asks seed list file；
Step 3：After P2P LIST SERVERs receive request, seed is selected, generate seed list, be sent to request P2P
Client；
Step 4：Local P2P clients select loading source based on seed list, start multi-thread concurrent and download courseware；
Step 5：After P2P clients receive the download application of other P2P clients, accepting applications and starting is transmitted across
Journey, and P2P LIST SERVERs are updated, the current Thread Count of this terminal adds 1.
The implementation method of the aforementioned SCORM Standard Courseware Play Systems based on P2P, it is characterised in that the step one is wrapped
Include：
Step 1a：When user clicks on Video Courseware, if P2P services are not actuated, courseware video automatically switches to Streaming Media
Service, the process is transparent to learner；
Step 1b：After user clicks on Video Courseware broadcasting, also in transmitting procedure, P2P LIST SERVERs are unexpected for courseware
Abnormal, P2P clients detect P2P LIST SERVER exceptions, and eject prompting frame, and then P2P clients are automatically exited from.
The implementation method of the aforementioned SCORM Standard Courseware Play Systems based on P2P, it is characterised in that the P2P is serviced not
The situation of startup includes：P2P clients are not actuated, P2P LIST SERVER exceptions.
The implementation method of the aforementioned SCORM Standard Courseware Play Systems based on P2P, it is characterised in that the step three guarantees
Include：According to selecting source policy to select 6 seeds, select if less than 6 all, be sky if not.
The implementation method of the aforementioned SCORM Standard Courseware Play Systems based on P2P, it is characterised in that the step 4 bag
Include：If seed number is more than or equal to 4, in order using first 4 as loading source, if seed number is more than 1 and is less than 4, plant
In sublist, all of seed, is directly downloaded to the application of P2P LIST SERVERs if seed list is sky all as loading source.
The implementation method of the aforementioned SCORM Standard Courseware Play Systems based on P2P, it is characterised in that the step 5 bag
Include：When the P2P client upload Thread Counts reach 4, this P2P client will not be made by P2P LIST SERVERs when source is selected
For seed node.
The implementation method of the aforementioned SCORM Standard Courseware Play Systems based on P2P, it is characterised in that the step 5 bag
Include：
Step 5a：When P2P clients just start to download, P2P clients directly can be carried out down from P2P LIST SERVERs
Carry；After P2P LIST SERVERs reach the upload upper limit, download will not be provided if there are P2P client applications again, prompting can be ejected
Frame " P2P LIST SERVERs are busy, please refresh courseware webpage and relearn "；
Step 5b：After the complete segmentation of P2P client downloads, P2P LIST SERVERs can be automatically updated, then has other
P2P clients are applying downloading the resource, you can the P2P clients of complete segmentation go to download the segmentation under；If P2P clients
Uploading Thread Count and reaching the upper limit 4, P2P LIST SERVERs will not then select this P2P client upload to be provided for other P2P clients
Service；
Step 5c：When the resource seed amount of P2P client applications exceedes setting numerical value, P2P LIST SERVERs can basis
Strategy and equilibrating mechanism are selected 6 and are sent to P2P clients and be downloaded, and all send if less than 6.
The implementation method of the aforementioned SCORM Standard Courseware Play Systems based on P2P, it is characterised in that described tactful and equal
Weighing apparatus mechanism includes following three types：
The first kind：For the user that checks in the network segment of areal, after logging in system by user, system will recognise that user belongs to
In the student in which area, the P2P client downloads of this area can be provided；P2P clients access P2P mesh with this P2P client
When record server selects source, the user in this area is only selected；
Equations of The Second Kind：When P2P LIST SERVERs select source, number sequencing selection is uploaded according to thread；
3rd class：When P2P LIST SERVERs select source, sequencing selection is differed from according to the heartbeat turnaround time.
The invention has benefit that：The present invention is not changing traditional SCORM courseware VODs learning system general frame
On the premise of user's occupation mode, introduce P2P technologies and solve the problems, such as high concurrent, handle up greatly, solve the traditional forms of enterprises
The online courseware learning system user rapid growth of SCORM, region dispersion, hardware put into big problem, make existing courseware study point
Broadcast system can meet the learning demand of enterprise's Web- Based Training rapid growth, improve quality, reduction enterprise that courseware is played
Training cost puts into, and can be widely applied to other enterprise's Web- Based Trainings.
Description of the drawings
Fig. 1 is the system operation schematic diagram of the present invention；
Fig. 2 is the P2P services of the present invention and streaming media service switching flow figure；
Fig. 3 is the P2P transmission basic flow sheets of the present invention；
Fig. 4 is the abnormality processing flow chart of the P2P transmission of the present invention；
Fig. 5 is that the P2P LIST SERVERs of the present invention select source policy flow chart.
Specific embodiment
Make specific introduction to the present invention below in conjunction with the drawings and specific embodiments.
With the development of the Internet media communications, P2P this new technique changes original centralized from mechanism
Content distribution models, are particularly suited for the larger content sharing application of number of users.It is high for enterprise Web- Based Training user
Speed increases, the centralized present situation for issuing courseware study content, and P2P technologies are highly suitable in online learning System, to carry
The bearing capacity of the system of liter.Therefore, object of this investigation is not change existing network university system framework and user user
In the case of formula, propose feasible scheme to be improved based on the online courseware learning system of P2P, change traditional SCORM standards class
Part program request learning system is difficult to the problem tackled high concurrent, handle up greatly so that existing courseware study VOD system can meet Soviet Union
The learning demand of TV university rapid growth, the quality for improving courseware broadcasting, reduction corporate training cost input.
The technical problem to be solved is：
How the compatibility issue of system two kind mode of operations is ensured, existing on-line study system is streaming media on demand service
Pattern, if on the original basis, based on a kind of new distributed resource release model of P2P Technology designs, needs to ensure whole system
Mutual switching of the system in terms of two kinds of service modes, it is complementary to one another；
How Media Player players support P2P mode of operation problems, under existing system mode of operation, Media
Player passes through real time streaming protocol RTP, RTCP and udp protocol with media P 2 P LIST SERVER as P2P clients
Content transmission is carried out, system is worked using " transmitting when playing " mode；
P2P system for content issues problem of load balancing, and the problem of load balancing in P2P systems refers to how to ensure in multiple systems
When system terminal concurrence is played, prevent seed and select hot issue, the P2P mechanism advantage of itself is that same content is played
User it is more, the speed that user later downloads is faster, but if good mechanism does not avoid its hot issue, its advantage
Just it is difficult to bring into play.
To solve above-mentioned technical problem, the present invention provides a kind of SCORM Standard Courseware Play Systems based on P2P, including
P2P LIST SERVERs, P2P clients and Active plug-in units, it is characterised in that traditional SCORM Standard Coursewares VOD system utilizes B/
S frameworks, on the basis of being serviced using streaming media playing, are to solve the problems, such as high concurrent, the easy congestion of centralized courseware issuing, not
On the premise of changing original system general frame and user's occupation mode, introduce P2P technologies and solve.With reference to shown in Fig. 1, the system
Mainly include P2P LIST SERVERs and P2P clients, Active plug-in units.
Wherein, P2P clients include：
Segment information synchronization module：For segment information is updated to P2P LIST SERVERs；
Heartbeat link block：Heartbeat packet is sent to P2P LIST SERVERs for timing；
Sectional management module：For managing size starting, the end position of each segmentation；
Exception management module：For processing to the exception that P2P clients are received when P2P is transmitted；
Load balancing module：For load balance process is carried out when P2P LIST SERVERs select source；
P2P LIST SERVERs include：
Heartbeat and renewal management module：For receiving the heartbeat packet of P2P clients, update terminal resource and possess situation；
Resource request management module：For receiving the request of P2P clients, selecting source to process and generate seed list；
P2P transport modules：For realizing that P2P is transmitted；
Active plug-in units are carried in courseware webpage, are responsible for the transmission download of P2P clients, webpage closing information.
As shown in figure 1, user is in terminal during order video courseware, the Active plug-in units in courseware webpage are by IP Information On Demand
Notify P2P clients；P2P clients interact application foradownloaded video Courseware Resource again with P2P LIST SERVERs；P2P directory services
Device receives P2P client requests, generates seed list, and feeds back to P2P clients；P2P clients are carried out according to seed list
Download.Idiographic flow description comprises the steps：
Step one：After user clicks on Video Courseware, webpage Active plug-in units block streaming media service access request first, to
P2P clients transmission download request, and the return state of request is waited, when the state of return is successfully, start P2P service moulds
Formula, is otherwise streaming media service pattern；
Step 2：After P2P clients receive plug-in request, local P2P clients send to P2P LIST SERVERs and download
Seed file is asked, and asks seed list file；
Step 3：After P2P LIST SERVERs receive request, 6 seeds are selected according to source policy is selected（If less than 6
Select all, be sky if not）, seed list is generated, request P2P clients are sent to；
Step 4：Local P2P clients select loading source based on seed list, start multi-thread concurrent and download courseware.If
Seed number is more than or equal to 4, then in order using first 4 as loading source, if seed number is less than 4 more than 1, own in list
Seed all as loading source, if list for sky, directly to the application of P2P LIST SERVERs download；
Step 5：After P2P clients receive the download application of other P2P clients, accepting applications and starting is transmitted across
Journey, and update the current biography Thread Count of P2P LIST SERVERs this terminals and add 1.When the P2P client upload Thread Counts reach 4,
P2P LIST SERVERs will not be using this P2P client as seed node when source is selected.
Furthermore：In P2P services with the design of streaming media service switchover policy, Fig. 2 describes P2P services and stream matchmaker
The strategy design of body service switching, mainly includes：
Switch before P2P service transmissions start：When user clicks on Video Courseware, if P2P services are not actuated, either
P2P clients are not actuated, or P2P LIST SERVER exceptions, and courseware video council automatically switches to streaming media service, the process pair
Learner is transparent；
Switch in P2P service transmissions：User click on Video Courseware play after, courseware also in transmitting procedure, P2P mesh
Record server is abnormal suddenly, and P2P clients can detect P2P LIST SERVER exceptions, and eject prompting frame, and " courseware transmission is lost
Lose, courseware please be close and reopened, study schedule will not be lost ", then P2P clients are automatically exited from.
In P2P transmission strategy designs, such as Fig. 3 describes the elementary tactics flow process of P2P transmission：
When just starting to download, there is no other seed P2P clients, P2P clients directly can be entered from P2P LIST SERVERs
Row is downloaded.After P2P LIST SERVERs reach the upload upper limit, then there is the application of P2P clients then not provide P2P client downloads,
Prompting frame " P2P LIST SERVERs are busy, please refresh courseware webpage and relearn " can be ejected.
After the complete segmentation of P2P client downloads, P2P LIST SERVERs can be automatically updated, then has other P2P client
End is applying downloading the resource, you can the P2P clients of complete segmentation go to download the segmentation under.If P2P client upload lines
Number of passes reaches the upper limit 4, and P2P LIST SERVERs will not then select this P2P client to provide upload service for other P2P clients.
When the resource seed amount of P2P client applications exceedes setting numerical value（Manually can set, such as 10）, P2P mesh
Record server can be selected 6 according to certain strategy and equilibrating mechanism and be sent to P2P clients and be downloaded, if less than 6
All send.
Fig. 4 describes the exception policy flow process of P2P transmission, after the download of P2P client application section resources, if connecting which
In the failure of certain seed P2P clients, then apply to P2P LIST SERVERs again, update seed list, select one it is new
P2P clients continue failure thread and download.Thus, if can not still connecting download after being repeated 2 times, being then no longer attempt to application other
User continues to complete download as source, but completes the thread directly to P2P LIST SERVERs and download.
Select in source policy ＆ equilibrium treatment mechanism in P2P services,
P2P LIST SERVERs select the seed that be adapted to generate seed according to the priority orders of following strategy when source is selected
List, and it is sent to the P2P clients of request.As shown in Figure 5：
First, user is checked in the network segment of areal：After logging in system by user, system will recognise which area user belongs to
Student, the P2P client downloads of this area can be provided.This P2P client access P2P LIST SERVER choosings of P2P clients
During source, the user in this area can be only selected；
2nd, number sequencing selection is uploaded according to thread：The timing of P2P clients sends a heartbeat to P2P LIST SERVERs and connects
Bag is connect, the information such as subsidiary some upload threads, heartbeat turnaround time stamp in bag, P2P LIST SERVERs can record these information simultaneously
These data can be used when source is selected.In order to keep current state to update, the time of heartbeat packet is set as comparing conjunction in 1 minute
Reason.P2P clients can send heartbeat packet to P2P LIST SERVERs, update.P2P mesh
When record server selects source, also can be ranked up according to the upload Thread Count of user, prioritizing selection uploads the few P2P clients of thread
As source, the quality in source had so both been can ensure that, it is also possible to accomplish load balancing；
3rd, sequencing selection is differed from according to the heartbeat turnaround time：The heartbeat packet that P2P clients send, can calculate one back and forth
Time difference, this time difference can reflect the problem of certain network bandwidth and machine performance.Root when P2P LIST SERVERs select source
Sort according to the size of time difference, prioritizing selection time difference little client computer is used as source.
The present invention is in the premise for not changing traditional SCORM courseware VODs learning system general frame and user's occupation mode
Under, introduce P2P technologies and solve the problems, such as high concurrent, handle up greatly, solve the online courseware learning systems of traditional forms of enterprises SCORM and use
Family rapid growth, region dispersion, hardware put into big problem, allow existing courseware study VOD system to meet enterprise and train online
The learning demand of exercising system rapid growth, the quality for improving courseware broadcasting, reduction corporate training cost input, can be widely applied to
Other enterprise's Web- Based Trainings.
The basic principles, principal features and advantages of the present invention have been shown and described above.The technical staff of the industry should
Understand, the invention is not limited in any way for above-described embodiment, it is all to be obtained by the way of equivalent or equivalent transformation
Technical scheme, all falls within protection scope of the present invention.
Claims (9)
1. SCORM Standard Courseware Play Systems based on P2P, it is characterised in that include：P2P LIST SERVERs, P2P clients,
Active plug-in units；
The P2P clients include：
Segment information synchronization module：For segment information is updated to P2P LIST SERVERs；
Heartbeat link block：Heartbeat packet is sent to P2P LIST SERVERs for timing；
Sectional management module：For managing size starting, the end position of each segmentation；
Exception management module：For processing to the exception that P2P clients are received when P2P is transmitted；
Load balancing module：For load balance process is carried out when P2P LIST SERVERs select source；
The P2P LIST SERVERs include：
Heartbeat and renewal management module：For receiving the heartbeat packet of P2P clients, update terminal resource and possess situation；
Resource request management module：For receiving the request of P2P clients, selecting source to process and generate seed list；
P2P transport modules：For realizing that P2P is transmitted；
The Active plug-in units are carried in courseware webpage, are responsible for the transmission download of P2P clients, webpage closing information.
2. described in claim 1 based on P2P SCORM Standard Courseware Play Systems implementation method, it is characterised in that include as
Lower step：
Step one：After user clicks on Video Courseware, webpage Active plug-in units blocking streaming media service access request, and it is objective to P2P
Family end sends download request, and the return state of the request that waits for downloads, and when the state of return is successfully, starts P2P service modes,
Otherwise it is streaming media service pattern；
Step 2：After P2P clients receive plug-in request, local P2P clients send to P2P LIST SERVERs and download seed
File request, asks seed list file；
Step 3：After P2P LIST SERVERs receive request, seed is selected, generate seed list, be sent to request P2P client
End；
Step 4：Local P2P clients select loading source based on seed list, start multi-thread concurrent and download courseware；
Step 5：After P2P clients receive the download application of other P2P clients, transmitting procedure is accepted applications and starts, and
P2P LIST SERVERs are updated, the current Thread Count of this terminal adds 1.
3. according to claim 2 based on P2P SCORM Standard Courseware Play Systems implementation method, it is characterised in that institute
Stating step one includes：
Step 1a：When user clicks on Video Courseware, if P2P services are not actuated, courseware video automatically switches to streaming media service,
The process is transparent to learner；
Step 1b：After user clicks on Video Courseware broadcasting, also in transmitting procedure, P2P LIST SERVERs are abnormal suddenly for courseware,
P2P clients detect P2P LIST SERVER exceptions, and eject prompting frame, and then P2P clients are automatically exited from.
4. according to claim 3 based on P2P SCORM Standard Courseware Play Systems implementation method, it is characterised in that institute
Stating the not actuated situation of P2P services includes：P2P clients are not actuated, P2P LIST SERVER exceptions.
5. according to claim 4 based on P2P SCORM Standard Courseware Play Systems implementation method, it is characterised in that institute
Stating step 3 includes：According to selecting source policy to select 6 seeds, select if less than 6 all, be sky if not.
6. according to claim 5 based on P2P SCORM Standard Courseware Play Systems implementation method, it is characterised in that institute
Stating step 4 includes：If seed number is more than or equal to 4, in order using first 4 as loading source, if seed number is more than 1 and little
In 4, then in seed list all of seed all as loading source, if seed list for sky, directly to P2P LIST SERVERs
Application is downloaded.
7. according to claim 6 based on P2P SCORM Standard Courseware Play Systems implementation method, it is characterised in that institute
Stating step 5 includes：When the P2P client upload Thread Counts reach 4, P2P LIST SERVERs will not be by this when source is selected
P2P clients are used as seed node.
8. according to claim 7 based on P2P SCORM Standard Courseware Play Systems implementation method, it is characterised in that institute
Stating step 5 includes：
Step 5a：When P2P clients just start to download, P2P clients directly can be downloaded from P2P LIST SERVERs；
After P2P LIST SERVERs reach the upload upper limit, download will not be provided if there are P2P client applications again, prompting frame can be ejected
" P2P LIST SERVERs are busy, please refresh courseware webpage and relearn "；
Step 5b：After the complete segmentation of P2P client downloads, P2P LIST SERVERs can be automatically updated, then has other P2P
Client is applying downloading the resource, you can the P2P clients of complete segmentation go to download the segmentation under；If in P2P clients
Passing Thread Count and reaching the upper limit 4, P2P LIST SERVERs will not then select this P2P client and upload clothes be provided for other P2P clients
Business；
Step 5c：When the resource seed amount of P2P client applications exceedes setting numerical value, P2P LIST SERVERs can be according to strategy
6 are selected with equilibrating mechanism it is sent to P2P clients and be downloaded, all sends if less than 6.
9. according to claim 8 based on P2P SCORM Standard Courseware Play Systems implementation method, it is characterised in that institute
Stating strategy and equilibrating mechanism includes following three types：
The first kind：For the user that checks in the network segment of areal, after logging in system by user, system will recognise which user belongs to
The student in individual area, can provide the P2P client downloads of this area；P2P clients this P2P client access P2P catalogue clothes
When business device selects source, the user in this area is only selected；
Equations of The Second Kind：When P2P LIST SERVERs select source, number sequencing selection is uploaded according to thread；
3rd class：When P2P LIST SERVERs select source, sequencing selection is differed from according to the heartbeat turnaround time.
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| CN107562887B (en) * | 2017-09-05 | 2020-09-04 | 北京华乐思教育科技有限公司 | Resource reference system and method for assisting PPT course preparation |
| CN110661829B (en) * | 2018-06-28 | 2021-09-21 | 杭州海康威视系统技术有限公司 | File downloading method and device, client and computer readable storage medium |
| CN109582393B (en) * | 2018-12-06 | 2022-03-15 | 国家电网有限公司 | Network courseware making method and device |
| CN111984868A (en) * | 2020-08-21 | 2020-11-24 | 上海二三四五网络科技有限公司 | Method and device for controlling webpage browsing in browser |
| CN115442385B (en) * | 2022-08-16 | 2024-10-01 | 浙江吉云教育科技集团有限公司 | Online education informatization teaching system of big data cloud platform |
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