CN105282216B - 用于保持兴趣存活于内容中心网络中的方法和系统 - Google Patents
用于保持兴趣存活于内容中心网络中的方法和系统 Download PDFInfo
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Abstract
一个实施例提供一种促进内容请求装置处理可能的超时事件的系统。在操作期间，所述系统通过内容产生装置从内容请求装置接收与第一兴趣消息相对应的包，其中所述第一兴趣包含名称。响应于确定需要另外的时间来产生用于所述第一兴趣的匹配的内容对象，所述系统产生指示时间段的通知消息，在所述时间段之后将通过所述内容请求装置发出第二兴趣。所述第二兴趣的所述名称可以与所述第一兴趣的所述名称相同或者是如所述通知消息中所指示的新名称。所述系统向所述内容请求装置发送所述通知消息，由此促进所述内容请求装置处理可能的超时事件。
Description
技术领域
本发明大体上涉及数字内容的分配。更确切地说，本发明涉及通过内容产生装置向内容请求装置提供可能的超时事件的通知，以便保持兴趣存活于内容中心网络(CCN)中。
背景技术
互联网和电子商务的扩增持续产生大量的数字内容。内容中心网络(CCN)架构已经设计以促进访问和处理此类数字内容。CCN包含实体或节点，例如网络客户端、转发器(例如，路由器)及内容产生者，所述内容产生者通过发送针对各种内容项的兴趣包和接收返回的内容对象包而彼此通信。CCN兴趣和内容对象通过它们的唯一名称标识，所述名称通常是分层结构式可变长度标识符(HSVLI)。HVLI可以包含从最一般层级到最特定层级排序的连续名称成分。当通过网络将兴趣包从内容请求节点路由到内容产生节点时，每个中间CCN路由器在其待决兴趣表(PIT)中添加与所述兴趣相对应的项且将所述兴趣转发到下一CCN路由器。当将匹配的内容对象包从内容产生节点发送回到请求节点时，所述内容对象包沿着所述兴趣的逆向路径。每个中间CCN路由器沿着在相对应的PIT项中所列的请求接口转发内容对象，且随后去除PIT项，指示兴趣已经满足。
当PIT项超时时，还可以通过CCN节点(或路由器)去除PIT项。在向节点的PIT添加兴趣后，所述节点可以选择其认为适当的任何超时值。PIT项可以在不同的情形下超时。一种情况是由于网络中拥塞导致，所述拥塞导致系统丢弃兴趣或匹配的内容对象。另一情况是当内容产生节点或负责产生匹配的内容对象的应用在其可以发回响应之前需要执行计算密集型任务(例如，花费45秒)时。在两种情况中，PIT项超时可以导致请求节点重新表达兴趣，所述重新表达有时是反复的且经过较短时间段。PIT项超时还可以使得中间CCN路由器在多个接口上发送经重新表达的兴趣，因此增加网络流量且产生另外的拥塞。
发明内容
一个实施例提供一种促进内容请求装置处理可能的超时事件的系统。在操作期间，所述系统通过内容产生装置从内容请求装置接收与第一兴趣消息相对应的包，其中所述第一兴趣包含名称。响应于确定需要另外的时间来产生用于第一兴趣的匹配的内容对象，所述系统产生指示时间段的通知消息，在所述时间段之后将通过内容请求装置发出第二兴趣。第二兴趣的名称可以与第一兴趣的名称相同或者是如通知消息中所指示的新名称。所述系统向内容请求装置发送通知消息，由此促进内容请求装置处理可能的超时事件。
在一些实施例中，通知消息进一步指示待发出的第二兴趣的名称，其中第二兴趣的名称与第一兴趣的名称相同或不同。
在一些实施例中，通知消息是内容对象，由此促进中间路由器在其待决兴趣表(PIT)中去除与第一兴趣相对应的项。
在一些实施例中，通知消息进一步指示内容产生装置产生内容以响应于第一兴趣。
在一些实施例中，内容产生装置接收与第二兴趣相对应的包。响应于确定用于第二兴趣的匹配的内容对象是可获得的，所述系统产生匹配的内容对象以响应于第二兴趣，其中所述匹配的内容对象将与第一兴趣相对应的内容包含为净荷。此外，响应于确定用于第二兴趣的匹配的内容对象是不可获得的，所述系统产生指示时间段的另外的通知消息，在所述时间段之后将通过内容请求装置发出第三兴趣。
在一些实施例中，所述系统通过内容请求装置产生与第一兴趣消息相对应的包，其中所述第一兴趣包含名称。所述系统向内容产生装置发送第一兴趣。所述系统接收指示时间段的通知消息，在所述通知消息之后将发出第二兴趣。响应于达到在通知消息中指示的时间段的期满，所述系统产生与第二兴趣消息相对应的包。所述系统接收匹配的内容对象以响应于第二兴趣，由此促进内容请求装置处理可能的超时事件。
在一些实施例中，响应于发送第二兴趣，内容请求装置接收指示时间段的另外的通知消息，在所述时间段之后将发出第三兴趣。
在一些实施例中，内容请求装置发送第二兴趣，其中第二兴趣包含在通知消息中指示的名称。
在一些实施例中，内容请求装置从待决兴趣表(PIT)去除一项，其中所述项与第一兴趣相对应。
在一些实施例中，内容请求装置在PIT中产生一项，其中所述项与第二兴趣相对应。
附图说明
图1图示根据本发明的实施例的促进内容请求装置处理可能的超时事件的示例性网络。
图2图示根据本发明的实施例的在内容请求装置与内容产生装置之间的示例性通信。
图3呈现图示根据本发明的实施例的通过内容请求装置处理内容的方法的流程图。
图4呈现图示根据本发明的实施例的通过内容产生装置处理需要另外的时间来产生匹配的内容对象的兴趣包的方法的流程图。
图5A图示根据本发明的实施例的第一CCN兴趣消息和通知消息的示例性格式。
图5B图示根据本发明的实施例的第二CCN兴趣消息和匹配的CCN内容对象的示例性格式。
图6图示根据本发明的实施例的促进内容请求装置处理可能的超时事件的示例性计算机和通信系统。
在图式中，相同参考标号指代相同图式元件。
具体实施方式
呈现以下描述以使得所属领域的技术人员能够制造并且使用实施例，并且在特定应用以及其要求的背景下提供以下描述。所属领域的技术人员将易于清楚对所揭示的实施例的各种修改，并且在不脱离本发明的精神和范围的情况下，本文中本所定义的一般原理可应用于其它实施例和应用。因此，本发明不限于所示出的实施例，而是应符合与本文中所揭示的原理和特征一致的最宽范围。
概述
本发明的实施例提供一种系统，所述系统在内容产生装置(例如，服务器)需要另外的时间来产生匹配的内容对象以响应于来自内容请求装置(例如，客户端)的兴趣时促进处理可能的超时事件。在操作期间，内容产生者从内容请求者接收第一兴趣消息且确定需要另外的时间来产生匹配内容对象。内容产生者向内容请求者发送通知消息，且包含估计计算将采用的时间连同将用于随后发送的第二兴趣中的名称。通知消息可以是内容对象，其名称与第一兴趣消息的名称相同或不同。当通知消息通过网络行进返回时，每个中间路由器将逆向路径上的内容对象转发为第一兴趣且从其待决兴趣表(PIT)去除相对应的项。内容请求者接收通知消息且记录持续时间。一旦持续时间期满，内容请求者使用通知消息中提供的名称发送第二兴趣。内容产生者随后将具有第二兴趣名称的内容对象发送回到内容请求者。匹配的内容对象将匹配第一兴趣的内容包含为净荷。当内容对象通过网络行进返回时，每个中间路由器将逆向路径上的内容对象转发为第二兴趣且从其PIT去除相对应的项。
内容产生者负责通知内容请求者正在进行响应性内容对象的产生。中间CCN路由器不跟踪在内容产生者处的计算进展且不需要在计算时间的持续时间上维持与第一兴趣相关联的状态。因此，第一兴趣通过内容产生者对内容请求者的通知和由内容请求者发出的经适当延迟的第二兴趣而“保活”。此解决方案减少了不必要的PIT项超时的量且释放PIT空间，这转而通过减少CCN中经重新表达的所发送且未决的兴趣的数目来较少网络拥塞。
在CCN中，每一内容片个别地得到命名，且每一数据片绑定到唯一名称，所述唯一名称区分所述数据与任何其它数据片，例如，相同数据的其它版本或来自其它源的数据。此唯一名称允许网络装置通过散播指示唯一名称的请求或兴趣来请求数据，且可独立于数据的存储位置、网络位置、应用以及传输方式而获得数据。以下术语用于描述CCN架构：
内容对象：单个命名数据片，其绑定到唯一名称。内容对象是“持久性的”，这意味着内容对象可以在计算装置内或跨越不同计算装置四处移动，但不发生改变。如果内容对象的任何成分改变，则造成所述改变的实体创建包含经更新内容的新内容对象，且将所述新内容对象绑定到新的唯一名称。
唯一名称：CCN中的名称通常是位置独立的且唯一地标识内容对象。数据转发装置可以使用名称或名称前缀来朝向产生或存储内容对象的网络节点转发数据包，而不管所述内容对象的网络地址或物理位置。在一些实施例中，名称可以是分层结构式可变长度标识符(HSVLI)。HSVLI可以划分成若干分层成分，所述成分可以不同方式构造。例如，个别名称成分parc、home、ccn以及test.txt可以左向前缀为主的方式构造以形成名称“/parc/home/ccn/test.txt”。因此，名称“/parc/home/ccn”可以为“/parc/home/ccn/test.txt”的“父代”或“前缀”。另外的成分可以用于区分内容项的不同版本，例如协作文档。
在一些实施例中，名称可以包含非分层标识符，例如从内容对象的数据(例如，校验和值)和/或从内容对象的名称的元素导出的散列值。基于散列的名称的描述在第13/847,814号美国专利申请案中得到描述。名称还可以是扁平标记。在下文中，“名称”用于指名称数据网络中的数据片的任何名称，例如分层名称或名称前缀、扁平名称、固定长度名称、任意长度名称或标记(例如，多协议标记交换(MPLS)标记)。
兴趣：包，其指示对于数据片的请求，且包含所述数据片的名称(或名称前缀)。数据消费者可跨越信息中心网络散播请求或兴趣，CCN路由器可朝向存储装置(例如，缓存服务器)或可以提供所请求数据以满足所述请求或兴趣的数据产生者传播所述请求或兴趣。
本文中所揭示的方法不限于CCN网络且同样适用于其它架构。CCN架构的描述在第12/338,175号美国专利申请案中得到描述。
图1图示根据本发明的实施例的促进内容请求装置处理可能的超时事件的示例性网络100。网络100可以包含内容请求装置116、内容产生装置118以及路由器或在节点102、104、106、108、110、112和114处的其它转发装置。节点可以是计算机系统、终端表示用户和/或可以生成兴趣或产生内容的装置。节点还可以是边缘路由器(例如，CCN节点102和114)或核心路由器(例如，中间CCN路由器104到112)。
内容请求装置116可以产生在内容片中的第一兴趣。网络100将兴趣路由到CCN路由器102，所述CCN路由器在其待决兴趣表(PIT)中添加一项且将所述兴趣转发到中间CCN路由器110。接收第一兴趣的每个CCN路由器执行相同的动作，在其PIT中添加一项且将第一兴趣转发到CCN路由路径中的下一跳(例如，CCN路由器110、112、114)。随后，CCN路由器114在其PIT中添加一项且将第一兴趣转发到内容产生装置118。装置118确定需要另外的计算时间来产生匹配的内容对象，因此装置118将通知消息发送回到内容请求装置116。通知消息可以是具有与第一兴趣相同的名称的内容对象，且可以进一步包含指示一定量的时间的持续时间(例如，30秒)，在所述一定量的时间之后，将通过内容请求装置116发出第二兴趣。通知消息还可以包含用于第二兴趣中的新名称。当通知消息行进回到内容请求装置116时，在逆向CCN路由路径上的每个CCN路由器(例如，CCN路由器114、112、110以及102)以及随后的装置116接收通知消息且去除用于第一兴趣的相对应的PIT项。
当在通知消息中指示的持续时间过去时，内容请求装置116使用在通知消息中提供的新名称发出第二兴趣。第二兴趣以与第一兴趣相同的路径行进(例如，通过CCN路由器102、110、112以及114)且到达内容产生装置118，所述内容产生装置在反向方向上沿着相同的路径将匹配的内容对象发送回内容请求装置116。每个中间路由器再次将匹配的内容对象转发到逆向数据路径中的前一跳节点且去除用于第二兴趣的相对应的PIT项。
在一些实施例中，内容请求装置116在通知消息中指示的持续时间已经过去之前可以发出第二兴趣。作为响应，如果匹配的内容对象是可获得的，那么内容产生装置118可以发送匹配的内容对象。替代地，内容产生装置118可以确定仍需要另外的计算时间来产生响应性内容对象。装置118可以发送指示时间段的第二(或另外)保活通知消息，在所述时间段之后将通过内容请求装置116发出第三兴趣。第二通知消息可以包含第三兴趣的名称，所述名称与第二兴趣的名称相同或不同。图2图示根据本发明的实施例的在内容请求装置(例如，图1中的装置116)和内容产生装置(例如，图1中的装置118)之间的示例性通信200。在内容请求装置116和内容产生装置118下方的竖直线指示时间的经过。在操作期间，内容请求装置116向内容产生装置118发送具有名称“/a/b/c/d”的第一兴趣(操作202)。装置118确定需要另外的计算时间来产生匹配的内容对象，且产生呈内容对象形式的通知消息(操作204)。装置118发送通知消息(即具有名称“a/b/c/d”的内容对象)和另外的信息以指示给请求装置116以通过在稍后的时间重新表达第一兴趣(作为第二兴趣)以保持第一兴趣存活(操作206)。通知消息包含以下消息：在发出第二兴趣之前等待(例如)另外的30秒且将新名称“/a/b/c/d1”用于第二兴趣。内容请求装置116监视时间，且当在通知消息中指示的持续时间已经过去时，使用如在通知消息中指示的新名称“/a/b/c/d1”发送第二兴趣(操作208)。同时，内容产生装置118已经成功地完成匹配第一兴趣的内容对象的产生(操作210)，因此装置118将匹配的内容对象发送回到装置116(操作212)。
图3呈现图示根据本发明的实施例的通过内容请求装置处理内容的方法的流程图300。在操作期间，系统通过内容请求装置产生与第一兴趣消息相对应的包(操作302)。系统产生相对应的PIT项且向内容产生装置发送第一兴趣(操作304)。内容请求装置接收指示时间段的通知消息，在所述时间段之后将发出第二兴趣(操作306)。通知消息可以呈内容对象的形式且还可以包含新名称以用于第二兴趣。系统去除用于第一兴趣的相对应的PIT项(操作308)。
内容请求装置确定在通知消息中指示的持续时间的期满且产生与第二兴趣消息相对应的包(操作310)。第二兴趣包含在通知消息中指示的新名称。在一些实施例中，第二兴趣包含与第一兴趣相同的名称。系统产生相对应的PIT项且向内容产生装置发送第二兴趣(操作312)。响应于第二兴趣，内容请求装置接收内容对象，所述内容对象将匹配第一兴趣的内容包含为其净荷(操作314)。最终，因为第二兴趣已经满足，所以系统去除用于第二兴趣的相对应的PIT项(操作316)。
图4呈现图示根据本发明的实施例的通过内容产生装置处理需要另外的时间来产生匹配的内容对象的兴趣包的方法的流程图400。在操作期间，系统通过内容产生装置接收与第一兴趣消息相对应的包(操作402)。系统确定需要另外的时间来产生匹配的内容对象以响应于第一兴趣(操作404)且产生指示时间段的通知消息，在所述时间段之后将发出第二兴趣(操作406)。所述时间段指示内容产生装置需要用来执行所需用以产生内容对象的计算的一定量的时间。任选地，通知消息还包含将用于第二兴趣中的名称。系统向内容请求装置发送通知消息(操作408)。在已经经过指定的持续时间之后，内容产生装置接收与第二兴趣相对应且包含在通知消息中指示的名称的包(操作410)。内容产生装置在已经完成必需的计算后产生内容对象以响应于第二兴趣(操作412)。内容对象将与第一兴趣相对应的内容包含为净荷。内容产生装置随后向内容请求装置发送此内容对象(操作414)。
应注意，第一兴趣和第二兴趣都可以行进通过包含多个中间CCN路由器的网络。这些CCN路由器中的每一者在其待决兴趣表(PIT)中添加用于适当的兴趣的相对应的项且将所述兴趣转发到CCN路由路径中的下一跳上。此外，通知消息和匹配的内容对象两者可以对应地作为第一兴趣和第二兴趣沿着逆向路径行进通过相同的网络。在一个实施例中，一旦从内容产生装置接收通知消息，逆向路径上的每个CCN路由器就去除在其PIT中的相对应的项。因此，从内容产生装置到内容请求装置的通知允许系统通过所得且经适当延迟的第二兴趣“保活”第一兴趣，同时释放在中间CCN路由器中的PIT空间。
图5A图示根据本发明的实施例的第一CCN兴趣消息500和通知消息520的示例性格式。第一兴趣500包含具有值“/a/b/c/d”的名称502。通知消息520包含：具有值“/a/b/c/d”的名称522，所述名称与第一兴趣500的名称502相同；指示持续时间的具有值“30秒”的等待持续时间524字段，在所述持续时间之后内容请求装置将发送第二兴趣；以及具有值“/a/b/c/d1”的第二兴趣名称526，所述名称不同于第一兴趣500的名称502。在一些实施例中，第二兴趣名称526可以具有与第一兴趣500的名称502的值相同的值。
图5B图示根据本发明的实施例的第二CCN兴趣消息540和匹配的CCN内容对象560的示例性格式。第二兴趣540包含具有值“/a/b/c/d1”的名称542，所述名称与通知消息520的第二兴趣名称526相同。匹配的内容对象560包含：具有值“/a/b/c/d1”的名称562，所述名称与第二兴趣540的名称542相同；以及具有等于与具有名称502“/a/b/c/d”的第一兴趣500匹配的内容的值的净荷564。
图6图示根据本发明的实施例的促进内容请求装置处理可能的超时事件的示例性计算机和通信系统602。计算机和通信系统602包含处理器604、存储器606、以及存储装置608。存储器606可以包含易失性存储器(例如，RAM)，所述易失性存储器充当管理存储器并且可用于存储一或多个内存池。此外，计算机和通信系统602可以耦接到显示装置610、键盘612和指向装置614。存储装置608可以存储操作系统616、内容处理系统618和数据630。
内容处理系统618可以包含指令，所述指令在通过计算机和通信系统602执行时可以使得计算机和通信系统602执行本发明中所描述的方法和/或过程。确切地说，内容处理系统618可以包含用于进行以下操作的指令：通过内容产生装置从内容请求装置接收与第一兴趣消息相对应的包，其中第一兴趣包含名称(通信机制620)。内容处理系统618还可以包含用于进行以下操作的指令：响应于确定需要另外的时间来产生匹配的内容对象而产生指示时间段的通知消息，在所述时间段之后将发出第二兴趣(通知消息机制622)。内容处理系统618可以包含用于向内容请求装置发送通知消息的指令(通信机制620)。内容处理系统618可以进一步包含用于进行以下操作的指令：接收与第二兴趣相对应的包(通信机制620)，且响应于确定用于第二兴趣的匹配的内容对象是可获得的，产生匹配的内容对象以响应于第二兴趣(内容产生机制628)。内容处理系统618可以包含用于进行以下操作的指令：响应于确定用于第二兴趣的匹配的内容对象是不可获得的，产生指示时间段的另外的通知消息，在所述时间段之后将通过内容请求装置发出第三兴趣(通知消息机制622)。
内容处理系统618可以另外包含用于进行以下操作的指令：通过内容请求装置产生与第一兴趣消息相对应的包，其中第一兴趣包含名称(通信机制620)。内容处理系统618可以包含用于进行以下操作的指令：向内容产生装置发送第一兴趣且接收指示时间段的通知消息，在所述时间段之后将发出第二兴趣(通信机制620)。内容处理系统618还可以包含用于进行以下操作的指令：响应于达到在通知消息中指示的时间段的期满，产生与第二兴趣消息相对应的包(重新表达兴趣机制624)。内容处理系统618可以包含用于发送第二兴趣的指令，其中第二兴趣包含与第一兴趣的名称相同或不同的名称(通信机制620)。内容处理系统618可以包含用于接收匹配的内容对象以响应于第二兴趣的指令(通信机制620)。内容处理系统618可以包含用于进行以下操作的指令：响应于发送第二兴趣，接收指示时间段的另外的通知消息，在所述时间段之后将发出第三兴趣(通信机制620)。
内容处理系统618可以进一步包含用于从待决兴趣表(PIT)移除一项的指令，其中所述项与第一兴趣相对应(待决兴趣表机制626)。内容处理系统618可以包含用于在PIT中产生一项的指令，其中所述项与第二兴趣相对应(待决兴趣表机制626)。
数据630可以包含通过本发明中所描述的方法和/或过程作为输入需要的或作为输出生成的任何数据。确切地说，数据630可以存储至少：与第一兴趣消息相对应的包；第一兴趣的名称；指示时间段的通知消息，在所述时间段之后将发出第二兴趣；等待持续时间；第二兴趣的名称；通知消息，其为内容对象；内容产生装置产生内容以响应于第一兴趣的指示符；与第二兴趣相对应且包含在通知消息中提供的名称的包；指示时间段的另外的通知消息，在所述时间段之后将发出第三兴趣；第三兴趣的名称；与第三兴趣相对应且包含第三兴趣的名称的包；将响应于第一兴趣的内容包含为净荷的内容对象；在待决兴趣表(PIT)中与第一兴趣相对应的项；与第二兴趣相对应的PIT项；以及与第三兴趣相对应的PIT项。
在此具体实施方式中所描述的数据结构和代码通常存储在计算机可读存储媒体上，所述计算机可读存储媒体可以是可以存储计算机系统可用的代码和/或数据的任何装置或媒体。计算机可读存储媒体包含但不限于易失性存储器、非易失性存储器、磁性和光学存储装置，例如磁盘驱动器、磁带、CD(压缩光盘)、DVD(数字多功能盘或数字视频光盘)、或能够存储现在已知或稍后开发的计算机可读媒体的其它媒体。
在具体实施方式部分中所描述的方法和过程可以实施为代码和/或数据，所述代码和/或数据可以存储于如上文所描述的计算机可读存储媒体中。当计算机系统读取且执行存储于计算机可读存储媒体上的代码和/或数据时，计算机系统执行实施为数据结构和代码且存储在计算机可读存储媒体内的方法以及过程。
此外，上文所描述的方法和过程可以包含在硬件模块或设备中。所述硬件模块或设备可以包含但不限于专用集成电路(ASIC)芯片、现场可编程门阵列(FPGA)、在特定时间处执行特定软件模块或一段代码的专用处理器或共享处理器以及现在已知或稍后开发的其它可编程逻辑装置。当激活硬件模块或设备时，这些硬件模块或设备执行其内部所包含的方法和过程。
Claims (9)
1.一种用于转发包的计算机实施的方法，所述方法包括：
通过内容产生装置从内容请求装置接收与第一兴趣消息相对应的包，其中所述第一兴趣包含名称；
响应于确定需要另外的时间来产生用于所述第一兴趣的匹配的内容对象，产生指示时间段的通知消息，在所述时间段之后将通过所述内容请求装置发送第二兴趣；以及
向所述内容请求装置发送所述通知消息；
响应于发送所述通知信息，由所述内容产生装置从所述内容请求装置接收所述第二兴趣；
由所述内容产生装置生成所述匹配的内容对象；
响应于接收所述第二兴趣，由所述内容产生装置向所述内容请求装置发送所述匹配的内容对象，
由此促进所述内容请求装置处理可能的超时事件。
2.一种用于促进包的转发的计算机系统，所述系统包括：
处理器；以及
存储指令的存储装置，所述指令在通过所述处理器执行时使得所述处理器执行一种方法，所述方法包括：
通过内容产生装置从内容请求装置接收与第一兴趣消息相对应的包，其中所述第一兴趣包含名称；
响应于确定需要另外的时间来产生用于所述第一兴趣的匹配的内容对象，产生指示时间段的通知消息，在所述时间段之后将通过所述内容请求装置发送第二兴趣；以及
向所述内容请求装置发送所述通知消息；
响应于发送所述通知信息，由所述内容产生装置从所述内容请求装置接收所述第二兴趣；
由所述内容产生装置生成所述匹配的内容对象；
响应于接收所述第二兴趣，由所述内容产生装置向所述内容请求装置发送所述匹配的内容对象，
由此促进所述内容请求装置处理可能的超时事件。
3.一种用于促进包的转发的计算机系统，所述系统包括：
处理器；以及
存储指令的存储装置，所述指令在通过所述处理器执行时使得所述处理器执行一种方法，所述方法包括：
通过内容请求装置产生与第一兴趣消息相对应的包，其中所述第一兴趣包含名称；
向内容产生装置发送所述第一兴趣；
接收指示时间段的通知消息，在所述时间段之后将发出第二兴趣；
响应于达到在所述通知消息中指示的所述时间段的期满，产生与所述第二兴趣消息相对应的包；以及
向所述内容产生装置发送所述第二兴趣；
接收匹配的内容对象以响应于所述第二兴趣，
由此促进所述内容请求装置处理可能的超时事件。
4.根据权利要求3所述的计算机系统，其中所述方法进一步包括：
响应于发送所述第二兴趣，接收指示时间段的另外的通知消息，在所述时间段之后将发出第三兴趣。
5.根据权利要求3所述的计算机系统，其中所述通知消息进一步指示待发出的所述第二兴趣的名称，其中所述第二兴趣的所述名称与所述第一兴趣的所述名称相同或不同。
6.根据权利要求5所述的计算机系统，其中所述方法进一步包括：
发送所述第二兴趣，其中所述第二兴趣包含在所述通知消息中指示的所述名称。
7.根据权利要求3所述的计算机系统，其中所述通知消息是内容对象。
8.根据权利要求3所述的计算机系统，其中所述方法进一步包括：
从待决兴趣表(PIT)去除一项，其中所述项与所述第一兴趣相对应。
9.根据权利要求3所述的计算机系统，其中所述方法进一步包括：
在待决兴趣表(PIT)中产生一项，其中所述项与所述第二兴趣相对应。
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| US20160020990A1 (en) | 2016-01-21 |
| CN105282216A (zh) | 2016-01-27 |
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| US20170149647A1 (en) | 2017-05-25 |
| EP2975826B1 (en) | 2020-02-12 |
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| US9590887B2 (en) | 2017-03-07 |
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