CN109451344A - P2p流媒体系统中基于关联规则的缓存替换方法 - Google Patents

P2p流媒体系统中基于关联规则的缓存替换方法 Download PDF

Info

Publication number
CN109451344A
CN109451344A CN201811623063.7A CN201811623063A CN109451344A CN 109451344 A CN109451344 A CN 109451344A CN 201811623063 A CN201811623063 A CN 201811623063A CN 109451344 A CN109451344 A CN 109451344A
Authority
CN
China
Prior art keywords
video
user
frequency band
correlation rule
super node
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201811623063.7A
Other languages
English (en)
Inventor
桂易琪
鞠爽爽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yangzhou University
Original Assignee
Yangzhou University
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yangzhou University filed Critical Yangzhou University
Priority to CN201811623063.7A priority Critical patent/CN109451344A/zh
Publication of CN109451344A publication Critical patent/CN109451344A/zh
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/433Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4335Housekeeping operations, e.g. prioritizing content for deletion because of storage space restrictions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/61Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/612Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60Network streaming of media packets
    • H04L65/65Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/50Network services
    • H04L67/56Provisioning of proxy services
    • H04L67/568Storing data temporarily at an intermediate stage, e.g. caching
    • H04L67/5682Policies or rules for updating, deleting or replacing the stored data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/433Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4331Caching operations, e.g. of an advertisement for later insertion during playback
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/442Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44213Monitoring of end-user related data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/466Learning process for intelligent management, e.g. learning user preferences for recommending movies
    • H04N21/4667Processing of monitored end-user data, e.g. trend analysis based on the log file of viewer selections
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47End-user applications
    • H04N21/472End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47202End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47End-user applications
    • H04N21/472End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47217End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/632Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing using a connection between clients on a wide area network, e.g. setting up a peer-to-peer communication via Internet for retrieving video segments from the hard-disk of other client devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Human Computer Interaction (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Social Psychology (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

P2P流媒体系统中基于关联规则的缓存替换方法,属于P2P流媒体技术领域,主要是根据用户的历史播放记录,推断出用户的兴趣爱好,即用关联规则找出用户进行VCR操作时的规律,事先将热点视频存入超级节点,以提高用户要观看的视频正好存储在缓存中的概率。

Description

P2P流媒体系统中基于关联规则的缓存替换方法
技术领域
本发明属于P2P流媒体技术领域,主要是根据用户的历史播放记录,推断出用户的兴趣爱好,即用关联规则找出用户进行VCR操作时的规律,事先将热点视频存入超级节点,以提高用户要观看的视频正好存储在缓存中的概率。
背景技术
流媒体是应用流式传输技术在网络上传播音频、视频或多媒体文件。流媒体应用的一个最大好处是用户不需要花费很长时间将数据全部下载到本地才能播放,而只需要将起始几秒的数据先下载到本地的缓冲区中就可以开始播放,然后边下载边播放,当网络实际连线速度小于播放所耗用资源的速度时,播放程序就会取用这一小段缓冲区的资料,避免播放中断,也使播放品质得以维持。因此,设计一种有效的缓存替换算法具有重要的意义。
在本发明提出之前,P2P流媒体缓存替换领域,最开始使用LRU、LFU、FIFO策略来替换,再到后来根据视频段的流行度来替换,用这些方法进行缓存替换的缺点有:
(1)将上一次访问时间作为决定是否缓存的唯一标准,会导致流行度较高或者系统中预先分发的视频段被删除,并且容易发生视频段刚刚被替换出去又被请求使用的状况,不适用于当前的服务需求。
(2)根据视频段的访问频率来计算缓存的价值,倾向于缓存请求量较高的视频段,存在缓存污染的问题,即访问频率较高的视频段即使不再被访问,依然占据着缓存空间。
(3)虽然在考虑视频流行度的同时提高了命中率,却增加了网络的流量,故存在副本不均匀的问题。
发明内容
本发明的目的就在于克服上述缺陷,研制P2P流媒体系统中基于关联规则的缓存替换方法。
P2P流媒体系统中基于关联规则的缓存替换方法,其主要技术特征在于如下步骤:
(1)获取用户的历史访问记录;
(2)计算每个视频段出现的频率,用关联规则找出支持度最高的3个段,即为待缓存段;
(3)进行缓存替换。本发明提出了两种缓存替换方法:基于关联规则的选择替换方法CRA-AR和基于关联规则的先进先出替换方法FIFO-AR。在CRA-AR中,首先用关联规则预测待缓存段,然后判断待缓存的视频段是否在超级节点中,得到缓存列表cache list,存在则cache(1,i)=1,不存在则cache(1,i)=0;其中i表示第i个待缓存视频段的标号。再有选择地进行缓存替换,当超级节点还有剩余空间时,直接将待缓存视频段存入超级节点,当超级节点没有剩余空间时,则将超级节点中流行度最低的视频段替换掉,如果流行度最低的视频段不止一个,则替换掉最先缓存的视频段。在FIFO-AR中,同样先用关联规则预测待缓存段,然后判断待缓存的视频段是否在超级节点中,得到缓存列表cache list,存在则cache(1,i)=1,不存在则cache(1,i)=0;其中i表示第i个待缓存视频段的标号。再按先进先出进行缓存替换,当超级节点还有剩余空间时,直接将待缓存视频段存入超级节点,当超级节点没有剩余空间时,则将超级节点中先进来的视频段先替换,后进来的视频段后替换。
(4)完成缓存替换操作后,计算请求视频段的响应时间;
(5)用户访问超级节点,计算命中率。
所述步骤(1)根据用户的历史播放记录,构建用户矩阵;通过步骤(2)推断出用户的兴趣爱好,即用关联规则找出用户进行VCR操作时的规律。
所述步骤(3)事先将热点内容存入超级节点,以提高用户要观看的视频正好在缓存中的概率;通过步骤(4)计算响应时间;通过步骤(5)计算命中率。
命中率是衡量缓存替换算法性能的标准,命中率越高,替换策略就越好。本发明的命中率是指超级节点在进行缓存替换后,用户即将要看的视频段存储在超级节点中的概率。使用命中率矩阵(MZ)存储超级节点中视频段的命中情况,如果命中,则置1;如果没有命中,则置0。其中i表示第i个用户节点(Userpeer),j表示用户节点中即将要观看的第j个视频段。假设有M个用户节点,每个用户节点有N个预选视频段。则命中率为:
本发明的优点和有益效果在于根据视频的流行度,结合数据挖掘中的关联规则对用户的喜好进行预测,具有较高的命中率。
在P2P流媒体点播系统中,用户可进行VCR操作,即可随时进行快进、快退等跳转。本发明在综合现有P2P视频点播系统的基础上进行了改进。因为要想能够很好地实现VCR交互式操作,最好将视频段预先取到缓存中。然而,用户的带宽是有限的,在保证视频正常播放的情况下,不能另外下载过多的数据,而且用户也不愿意自己的缓存空间被过多占用,因此需要采用关联规则找出用户进行VCR操作时的规律,有选择地预取。本发明给出节点的播放记录,超级节点通过这些播放记录,根据关联规则得出待缓存的段。再结合流行度进行段缓存和段替换,结果表明该技术可以提高视频段的命中率,降低响应时延,使用户得到更好的体验,扩展了该技术在流媒体领域的应用范围和实用性。
附图说明
图1——本发明中步骤(2)中支持度曲线;
图2——本发明方法的系统流程示意图;
图3(a)、图3(b)——本发明与其他方法在用户正常访问时的命中率比较图;
图4(a)、图4(b)——本发明与其他方法在用户非正常访问时的命中率比较图;
图5——本发明与其他方法的用户响应时间比较图。
具体实施方式
本发明的技术思路是:
P2P流媒体点播系统主要由3个部分组成:源服务器(Source server)、超级节点(Super node)、用户节点(User node)。设置参数模型如下:
(1)节点的播放记录Playback record:节点在播放视频段时,会将记录保存下来,即用户过去一段时间内所访问的段序号,形成一个记录列表,通过关联规则找出用户进行VCR操作时的规律,有选择地预取待缓存的视频段。
(2)用户节点User node:部分用户在观看视频时,会进行前进、倒退、暂停等VCR操作,他们通常只观看自己感兴趣的视频段或热点视频段。用户节点里存储着用户即将要访问的视频段序号。
(3)超级节点Super node:超级节点用来存储预先缓存的视频段。在获取待缓存段后,若超级节点的空间足够,则直接存储待缓存的视频段;若超级节点的空间不够,则将流行度最低的视频段替换出去,腾出一段缓存空间,用来存待缓存的视频段。如果流行度最低的视频段不止一个,则替换掉最先缓存的视频段。
如图2所示,根据用户的历史播放记录,推断出用户的兴趣爱好,即用关联规则找出用户进行VCR操作时的规律,事先将热点视频存入超级节点。以提高用户要观看的视频正好存储在缓存中的概率。当用户请求视频段时,若视频在缓存中,则向用户返回视频段。在提高命中率的同时,还能保证数据传输的实时性。若出现视频不在缓存中的情况,则超级节点优先从邻居节点获取即将观看的视频。若邻居节点里没有该视频,则从其他超级节点或者服务器获取,然后根据流行度进行缓存替换。最后用户访问超级节点并计算命中率。
在关联规则中,根据以往的用户访问记录,提取待缓存段,本发明提出的改进的关联规则如下表所示:
首先根据用户的历史访问记录,提取流行度最高的视频段,有时流行度最高的视频段有一个或多个。再从所有提取出的视频段中,找出支持度最高即出现频率最高的一个或多个视频段,如上表所示视频段8的支持度为4/7,视频段9的支持度为2/7,视频段10的支持度为1/7,所以选择视频段8进行缓存。
实施例:
本发明重点在于使用关联规则(AR)进行预取,为了验证本发明所提出的算法的性能,特地将本发明提出的基于关联规则的选择替换方法(CRA-AR)和基于关联规则的先进先出替换方法(FIFO-AR)分两种情况(用户正常访问和非正常访问)与基于流行度的先进先出替换方法(FIFO-P)和基于流行度的视频点播方法(VOVOP)进行比较。
从图3(a)中可看出,当用户正常访问时,用户访问满足泊松分布,流行度较高的段用户访问的概率就越大。CRA-AR将流行度较低的段替换成value列表中的段,可以有效提高超级节点中视频段的命中率。FIFO-AR将排在最前面的视频段替换出去,排在最前面的视频段也有可能是流行度较高的段,导致命中率略微下降。所以相比于FIFO-P,本发明提出的CRA-AR和FIFO-AR的命中率是有较大提升的。
在图3(b)中,VOVOP算法根据用户的访问记录,提取出现次数最多的段,但访问记录中的段出现频率与段全局出现频率有所差距,所以会影响到命中率。也可说明融入了关联规则的方法,相比于VOVOP有明显优势。
由图4(a)可知,当用户非正常访问时,用户访问随机性较高,波动较大,CRA-AR,FIFO-AR以及FIFO-P的命中率都有较大下降,低于0.67。其中CRA-AR的命中率略低于FIFO-AR,但是仍高于FIFO-P。
在图4(b)中,由于VOVOP算法对段流行度的依赖程度不高,所以命中率几乎维持不变,但仍低于本发明所提CRA-AR和FIFO-AR的命中率。由此可见,基于关联规则的缓存替换策略比传统的基于流行度的缓存替换策略性能更为优越。
图5为100个用户节点从超级节点中请求视频段时的总响应时间。从图5中可以看出,CRA-AR和FIFO-AR的响应时间基本持平,FIFO-P和VOVOP的响应时间偏高,所以本发明提出的融入了关联规则的缓存替换方法具有较低的响应时延和较高的命中率。

Claims (4)

1.P2P流媒体系统中基于关联规则的缓存替换方法,其特征在于,包括如下步骤:
(1)获取用户的历史访问记录;
(2)计算每个视频段出现的频率,用关联规则找出支持度最高的3个段,即为待缓存段;
(3)采用两种缓存替换方法进行缓存替换:
①基于关联规则的选择替换方法CRA-AR:首先用关联规则预测待缓存段,然后判断待缓存的视频段是否在超级节点中,得到缓存列表cache list,存在则cache(1,i)=1,不存在则cache(1,i)=0;其中i表示第i个待缓存视频段的标号;
再有选择地进行缓存替换,当超级节点还有剩余空间时,直接将待缓存视频段存入超级节点,当超级节点没有剩余空间时,则将超级节点中流行度最低的视频段替换掉,如果流行度最低的视频段不止一个,则替换掉最先缓存的视频段;
②基于关联规则的先进先出替换方法FIFO-AR:先用关联规则预测待缓存段,然后判断待缓存的视频段是否在超级节点中,得到缓存列表cache list,存在则cache(1,i)=1,不存在则cache(1,i)=0;其中i表示第i个待缓存视频段的标号;
再按先进先出进行缓存替换,当超级节点还有剩余空间时,直接将待缓存视频段存入超级节点,当超级节点没有剩余空间时,则将超级节点中先进来的视频段先替换,后进来的视频段后替换;
(4)完成缓存替换操作后,计算请求视频段的响应时间;
(5)用户访问超级节点,计算命中率。
2.根据权利要求1所述的P2P流媒体系统中基于关联规则的缓存替换方法,其特征在于,所述步骤(1)根据用户的历史播放记录,构建用户矩阵。
3.根据权利要求2所述的P2P流媒体系统中基于关联规则的缓存替换方法,其特征在于,通过步骤(2)推断出用户的兴趣爱好,即用关联规则找出用户进行VCR操作时的规律。
4.根据权利要求1所述的P2P流媒体系统中基于关联规则的缓存替换方法,其特征在于,所述步骤(3)事先将热点内容存入超级节点,以提高用户要观看的视频正好在缓存中的概率。
CN201811623063.7A 2018-12-28 2018-12-28 P2p流媒体系统中基于关联规则的缓存替换方法 Pending CN109451344A (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811623063.7A CN109451344A (zh) 2018-12-28 2018-12-28 P2p流媒体系统中基于关联规则的缓存替换方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811623063.7A CN109451344A (zh) 2018-12-28 2018-12-28 P2p流媒体系统中基于关联规则的缓存替换方法

Publications (1)

Publication Number Publication Date
CN109451344A true CN109451344A (zh) 2019-03-08

Family

ID=65541964

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811623063.7A Pending CN109451344A (zh) 2018-12-28 2018-12-28 P2p流媒体系统中基于关联规则的缓存替换方法

Country Status (1)

Country Link
CN (1) CN109451344A (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109981760A (zh) * 2019-03-13 2019-07-05 扬州大学 基于贪心算法的p2p流媒体节点选择方法
CN110225136A (zh) * 2019-06-24 2019-09-10 维沃移动通信有限公司 一种离线缓存方法及移动终端
CN111083236A (zh) * 2019-12-31 2020-04-28 扬州大学 基于流行度度量的缓存替换方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101951395A (zh) * 2010-08-30 2011-01-19 中国科学院声学研究所 一种基于访问预测的P2P VoD系统服务端的数据缓存策略
CN104822068A (zh) * 2015-04-29 2015-08-05 四达时代通讯网络技术有限公司 流媒体代理缓存替换方法及装置
CN105491156A (zh) * 2016-01-08 2016-04-13 华中科技大学 一种基于sd-ran的全网协同内容缓存管理系统及方法
CN106776380A (zh) * 2016-11-28 2017-05-31 清华大学 终端内容缓存替换方法及替换装置
CN107480072A (zh) * 2017-08-22 2017-12-15 中南大学 基于关联模式的透明计算服务端缓存优化方法及系统
CN107911711A (zh) * 2017-10-24 2018-04-13 北京邮电大学 一种考虑分区的边缘缓存替换改进方法
CN108418855A (zh) * 2018-01-22 2018-08-17 北京邮电大学 基于命名数据网络ndn的主动缓存方法、装置及系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101951395A (zh) * 2010-08-30 2011-01-19 中国科学院声学研究所 一种基于访问预测的P2P VoD系统服务端的数据缓存策略
CN104822068A (zh) * 2015-04-29 2015-08-05 四达时代通讯网络技术有限公司 流媒体代理缓存替换方法及装置
CN105491156A (zh) * 2016-01-08 2016-04-13 华中科技大学 一种基于sd-ran的全网协同内容缓存管理系统及方法
CN106776380A (zh) * 2016-11-28 2017-05-31 清华大学 终端内容缓存替换方法及替换装置
CN107480072A (zh) * 2017-08-22 2017-12-15 中南大学 基于关联模式的透明计算服务端缓存优化方法及系统
CN107911711A (zh) * 2017-10-24 2018-04-13 北京邮电大学 一种考虑分区的边缘缓存替换改进方法
CN108418855A (zh) * 2018-01-22 2018-08-17 北京邮电大学 基于命名数据网络ndn的主动缓存方法、装置及系统

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
谢海林: ""对等网络流媒体点播系统调度机制和缓存策略研究"", 《中国优秀硕士学位论文全文数据库》 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109981760A (zh) * 2019-03-13 2019-07-05 扬州大学 基于贪心算法的p2p流媒体节点选择方法
CN110225136A (zh) * 2019-06-24 2019-09-10 维沃移动通信有限公司 一种离线缓存方法及移动终端
CN110225136B (zh) * 2019-06-24 2021-05-07 维沃移动通信有限公司 一种离线缓存方法及移动终端
CN111083236A (zh) * 2019-12-31 2020-04-28 扬州大学 基于流行度度量的缓存替换方法

Similar Documents

Publication Publication Date Title
CN107181734B (zh) 一种cdn-p2p网络架构的流媒体缓存替换方法
US7028096B1 (en) Method and apparatus for caching for streaming data
KR101556453B1 (ko) 분할 멀티미디어를 위한 캐시 관리자 및 캐시 관리를 위한 대응 방법
CN109451344A (zh) P2p流媒体系统中基于关联规则的缓存替换方法
Cheng et al. A Measurement Study of a Peer-to-Peer Video-on-Demand System.
US7860950B2 (en) Metadata enabled push-pull model for efficient low-latency video-content distribution over a network
US20140223107A1 (en) Cache Replacement Method and System
CN102447973B (zh) 一种缓存调整的方法、装置和系统
CN100568957C (zh) 一种基于p2p技术的视频点播节目缓存方法
CN101304514B (zh) 一种视频点播系统及其数据缓存方法和调度服务器
JP2003167813A (ja) ストリームデータの蓄積・配信方法及びストリームデータの蓄積・配信システム
De Vleeschauwer et al. Performance of caching algorithms for IPTV on-demand services
He et al. VOVO: VCR-oriented video-on-demand in large-scale peer-to-peer networks
De Vleeschauwer et al. Optimum caching strategies for a telco CDN
CN103414747A (zh) 一种自适应流媒体缓存方法
Hong et al. A chunk-based caching algorithm for streaming video
Wu et al. Reuse time based caching policy for video streaming
Verhoeyen et al. Content storage architectures for boosted IPTV service
Hsu et al. A weighted segment-based caching algorithm for video streaming objects over heterogeneous networking environments
Liao et al. idare: Proactive data replication mechanism for p2p vod system
KR20220078244A (ko) 콘텐츠 조각 캐싱을 위한 캐시 파일 관리 방법 및 이를 수행하는 엣지 서버
Ponnusamy et al. Cache optimizatio Hot-Point Proxy (HPProxy) using Dual Cache Replacement Policy
Abbasi et al. COOCHING: cooperative prefetching strategy for P2P video-on-demand system
Li et al. Towards health of replication in large-scale P2P-VoD systems
He et al. Supporting VCR in peer-to-peer video-on-demand

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20190308

RJ01 Rejection of invention patent application after publication