CN1523848A - 具有nat的网络中的sip服务方法 - Google Patents

具有nat的网络中的sip服务方法 Download PDF

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CN1523848A
CN1523848A CNA2003101246176A CN200310124617A CN1523848A CN 1523848 A CN1523848 A CN 1523848A CN A2003101246176 A CNA2003101246176 A CN A2003101246176A CN 200310124617 A CN200310124617 A CN 200310124617A CN 1523848 A CN1523848 A CN 1523848A
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China
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nat
user agents
address
message
port
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CN100466650C (zh
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��ѡ��
金选建
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Ericsson LG Enterprise Co Ltd
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LG Electronics Inc
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Abstract

在具有NAT的网络中提供一种SIP服务方法。NAT内的一个代理的专用地址/端口可以在NAT的一个静态映射表中注册以用来从NAT的外部访问NAT内部的代理。如果报文到达映射到属于代理的专用IP地址/端口的NAT的公共IP地址/端口，所有的SIP报文可能会自动转发到映射到公共地址的代理的专用IP地址/端口。如果代理想把报文转发到NAT的外部，则用映射到代理的专用IP地址/端口的公共IP地址/端口在NAT建立一个与外部的连接。

Description

具有NAT的网络中的SIP服务方法
本申请要求了2002年12月27日申请的韩国专利申请号为10-2002-0084994的优先权，在此引入其主要内容作为参考。
发明背景
发明领域
本发明的实施方案涉及一种在具有网络地址转换(NAT)的网络中的会话启动协议(SIP)服务方法。更具体而言，本发明的实施方案涉及在具有网络地址转换的网络中的一种SIP服务方法，它能通过实时协议(RTP)中继器和NAT的静态映射表来实现SIP服务。
相关背景技术
网络地址转换(NAT)可以作为一种用于解决有关因特网协议(IP)消耗以及大的路由规模的问题的方法。在一个通信网络中，NAT在网络层，也就是OSI模型的第三层，把专用IP地址转换成公共IP地址。NAT使多路专用IP地址转换成有限数量的公共IP地址成为可能，反之亦然，从而使多路用户共享公共IP地址。
NAT将内部访问信息(即，内部IP地址/端口对)映射到外部的或者公共的访问信息(即，外部的或公共的IP地址/端口对)。依据是否为任一和每一个目的地址产生一个新的映射值(即，一个映射值不可以用于另一个地址)或者是否为一个目的地址产生的一个映射值可以被用于另一个目的地址，NAT可能是四种类型中的一种：完整体，受限体，端口受限体和对称(symmetric)。
四种类型的NAT中，前三种可为另一个目的地址使用一为连接某一目的地址而产生的映射值。至于对称的NATs，为某一目的地址产生的映射值不可被用作其它任何一个目的地址。因此，可为各个目的地址产生一个映射值。
SIP是一个可供多媒体数据传输和因特网电话呼叫等使用的标准的协议。SIP可用于初始化、修改和终止一个包括一个或多个参与者的会话。另一方面，一个会话描述协议(SDP)可用于在相关会话中为多媒体服务通信描述会话信息。
图1是解释一个在呼叫建立完成之前实现的信号处理过程和一个媒介流过程，其中，在通过NAT提供SIP服务的情况下连接呼叫和发送RTP数据。
图1中，代理(X’，Y’)(130，230)安装于NATs的外部(120，220)。如果相关域(域A，域B)的用户代理商(X，Y)(110，210)发出SIP请求，代理(130，230)决定这样的呼叫请求应该发送到哪一个目的。代理(130，230)可能也修改相关的报头和前述的行为。
图1中，用户代理商X(SIP UA X，110)属于域A(域A，100)，用户代理商Y(SIP UA Y，120)属于域B(域B，200)。如果用户代理商X(110)向属于不同域的用户代理商Y(120)发出一个呼叫请求，那么信号处理过程就会如下进行。
首先，如果用户代理商X(110)经由NAT(120)向代理X’(SIP代理X’)(130)发送一个呼叫请求，代理X’(SIP代理X’)(130)通过把转接报头参数(接收的，报告)加到SIP报文中从而发出一个呼叫请求。在发信号的步骤中，为了促进NAT流通，从一个请求报文(用于初始的呼叫请求)到一个结束报文(用于最后的呼叫结束)的所有SIP报文必须通过那些代理。因此，要用到代理需求和记录路由报头。
另一方面，通过相关的NAT220从代理Y’(代理Y’)(230)到用户代理商Y(210)的呼叫请求的传输以及此外的一个响应的接收，均是由用户代理商Y(210)以代理Y，(230)注册的方式解决的。如果代理Y’(230)和用户代理商Y(210)一直是连接的或处于UDP情况，那么NAT的问题可以采用如下方式解决：一种信号脉冲方法，转换报头，无效报头，以及与转接报头的参数一起的选项要求，等。这时，代理Y’(230)存储转接报头的参数(接收，报告)，该参数是在报文接头域中的注册期间而不是信息期间获得的。以此方式，NAT中的用户代理商Y(210)通过使用存储的信息可能被又一次的连接以用于将来的传输。
这种连接方式下，由于NAT的一个UDP绑定的有效期通常是大约1分钟，用户代理商Y(210)必须以小于1分钟的时间间隔不断的发送注册报文来保持激活NAT UDP绑定。
一旦SIP信号结束，用户代理商X(110)和用户代理商Y(210)之间借助于相互传输RTP数据来通信，从而媒介流通过NAT。
为了与用户代理商Y(210)通信，用户代理商X(110)包括接收一个SDP报文中的媒介流所需要的信息，该SDP报文是在SIP报文本体中包含的(即，包括IP地址，端口和媒介数据，等。在域中m＝(媒介)及c＝(连接))。用户代理商X(110)发送这个报文。因此，可以利用不同的方法。如果NAT是完整体类型，受限体类型或端口受限体类型，则，使用了由微软提议的一通用插件和播放(UPnP)和某一具体服务器(NAT探测器或STUN服务器)等的一个外部查询和STUN(通过NATs的UDP的简单遍历)协议将被利用。
根据该方法，相关的终端可以直接向NAT请求NAT的外部访问信息(外部IP：端口)，该外部访问信息在信号或相关终端向其它服务器(NAT探测器或STUN服务器)请求提供信息之前映射到NAT的内部访问信息(内部IP：端口)。接着，终端包括在SDP的m＝(媒介)和c＝(连接)域中的NAT的外部IP和端口信息(外部IP：端口)并且发送这个信息。以这种方式可以解决媒介流的NAT问题。
然而，上述方法(即，使用NAT探测器或STUN服务器的方法)只能适用于NATs的三种类型。对称的NAT情况下，外部用户代理商(210)只有从用户代理商X(110)接收到大量的RTP数据后才可能识别出相关访问信息(IP：端口)(NAT绑定)。因此，外部用户代理商必须一直等到它接收到RTP数据。这就是所谓的“连接定向媒介”。
这时，内部用户代理商包括SDP报文中的a＝方向：激活行(零或更多的媒介属性)并且发送这个信息。因此，外部代理商忽略SDP报文中的访问信息(IP：端口)。
上述在具有NAT的网络中的SIP服务方法可能有如下问题。首先，为了与信号连接，在SIP标准文件RFC2543中，没有把转接报头参数的报告定义成一个必要的应用项目。因此，大部分的代理不能使用报告来解决NTP问题，这是因为即使报告包括在SIP报文中他们也会忽略报告。
更进一步，即使通过RFC3261的TCP连接是RFC2543中建议的，UDP也是缺省值并且TCP支持不是一个必要的条件。这样，许多SIP终端可能不支持TCP。因此，为了用UDP提供服务，NAT UDP绑定需要连续地被激活以使代理与NAT中的终端连接。为了这个目的，终端必须在接下来的通用存活期结束之前连续的发送注册报文。从而，这些方法在网络中产生了大量的数据流并且使得网络负载很重。
此外，上面提到的信号脉冲方法和转换报头等不是RFC2543的必要条件，因此终端不支持这样的方法或报头。
另一方面，出现下列RTP媒介流的问题。在RTP步骤中的问题可能有所不同，这取决于应用的方法或协议。微软建议的通用插件和播放(UPnP)在NATs中不能运行，而且，为了支持插件和播放(UPnP)协议，需要在普通的NATs中应用通用的插件和播放协议。这就需要大量的花费来实现这个目的。
假设在外部查询方法中，用于发送RTP的端口必须与接收RTP的端口相同。而且，在通过连接NAT探测器获得的映射值变成另外的某时段通路上的值之前，必须使用映射值将SIP报文发送到相关的目的地。假设NAT的受限体类型或NAT的端口受限体类型中，在从另外一个组接收媒介数据之前，相关媒介路径必须通过发送媒介数据来激活。此外，假设在对称的NAT中，每一个目的地址的映射值是不同的。这样，通过连接NAT探测器或STUN服务器获得的映射值不能被用于连接其它的任意组。因此，上述方法可能不适用。
同样，假设在一个对称的NAT中，如果外部用户代理商不在NAT中，那么外部用户代理商必须支持a＝方向：有效接头。然而，这不是RFC2543中必须应用的必要条件，并且许多终端不支持这个特点。而且，如果外部用户代理商在对称的NAT中，那么一个叫做RTP中继器的具体组件必须被插入到两个用户代理商之间的RTP流量的中间。
发明概述
本发明的目标是至少解决上述问题和/或缺点以及至少提供以下所述的优点。
本发明的实施方案试图解决下列相关问题：用于NAT通路的先前SIP组件中的软件升级问题，网络流量增加问题，SIP方法或新的NATs报头的补充问题，不同公司的SIP组件的不兼容性以及现有的NATs的升级与替换问题。更进一步，本发明的实施方案试图提供一种可应用到所有类型的NATs中的SIP服务方法。
本发明的实施方案可在具有NAT的网络中提供一种SIP服务方法。这可能包括在一个静态映射表中注册一个在NAT中的代理专用地址/端口以致于可从NAT的外部访问NAT内的代理。如果报文到达NAT的公共IP地址/端口，该NAT的公共IP地址/端口映射到代理专用的IP地址/端口，那么所有的SIP报文可被自动发送到映射到公共地址的代理专用IP地址/端口。如果代理要把报文发送到NAT的外部，就可能要用映射到代理专用IP地址/端口的公共IP地址/端口在NAT建立一个到外部的连接。
如果NAT内的代理要把报文发送到NAT的外部，SIP服务方法可以增加转接报头的参数，包括在相关NAT静态映射表中注册的代理的公共IP地址和端口而不是代理的专用IP地址和端口。接着就可以发送报文了。
本发明的实施方案还可包括：一个第一用户代理商为一个第二用户代理商发送一个SIP请求报文到一个第一代理，第一代理是在和第一用户代理商位于同一域的NAT的静态映射表中注册的。在位于域外部的RTP中继器中，通过第一代理的内部操作可以为媒介处理过程创建和保存多路公共地址/端口对。第一代理可以将SDP报文中的专用访问信息(IP地址/端口对)改变成一个多路公共访问信息值，该SDP报文是从第一用户代理商接收到的。通过一个在另外的NAT中的静态映射表中注册的第二代理，SIP请求报文可被发送到第二用户代理商。通过位于和第二用户代理商相同的NAT中的第二代理，第二用户代理商发送一个对应于请求报文的响应报文给第一代理。基于从第二用户代理商接收到的响应报文，第一代理可在SDP中将专用访问信息值(IP地址/端口对)修改成一个在RTP中继器中创建的剩余的公共访问信息值并且把响应报文发送到第一用户代理商。为了得到NAT绑定值以建立一个语音通信路径，每个用户代理商可向请求报文或响应报文中修改过的公共访问信息值发送具体媒介因此就创建了NAT绑定值。创建的NAT绑定值可被映射到先前在RTP中继器中创建的多路公共访问信息值。这些绑定值被存储起来。基于接收到的响应报文，第一用户代理商为响应报文发送一个确认。然后如此设置的呼叫结束。
设置的呼叫之后，SIP服务方法进一步包括RTP中继器，它能使两个用户代理商相互之间通过公共访问信息和映射的NAT绑定值发送和接收媒介，所述的NAT绑定值是RTP中继器本身具有的。
本发明的其他优点、目的、特性和具体实施例将会在下面的描述中分部地阐明并且分部地对于那些本领域的普通技术人员来说；基于下面的分析是清楚的或可从本发明的实例中得到。
附图简述
下面是附图的简述，其中相同的参考数字表示相同的元件。其中：
图1描述了在具有NAT的网络中的SIP服务的网络结构和根据一个实施例的SIP服务的例子；
图2描述了根据本发明的一个实施例，具有SIP服务方法的一种网络结构；及
图3是一个流程图，描述了根据本发明的一个实施例，在具有NAT的网络中的SIP服务方法。
优选实施例的详细描述
现在参照相应的图来描述在具有NAT的一个网络中的一种SIP服务方法的优选实施例。
因为没有任何的修改就在终端间用SIP协议在IP网络上通信是有难度的，网络工程任务组(IETF)内的不同工作组可能会通过网络草案等提出解决这个问题的方法。
IETF提议了三种方法来解决上述问题。一种是在NAT中包括一个可以识别SIP协议的应用层网关(ALG)。另一种是使用IPv6协议。另外一种是使用中间盒体通信(MIDCOM)来控制NAT。然而，这些提议方法真正要实现需要很长的时间。于是，每个SIP工作组或每个相关的公司可能设计自己的短期方法并且使用该方法在NAT环境中提供SIP服务。
各自的短期方法依靠相关公司使用的协议或NAT支持这个协议。因此，这些方法可以被用于在有关领域中已经使用过的NAT环境中。代替地，可通过更新或替换现有的NATs提供SIP服务。
进一步，RFC2543，也就是SIP的一个标准建议，不会给NAT通路提供足够的标准。因此，为了用上述方法提供服务，依照RFC2543制作的许多代理或代理商可给RFC3261实施一个更新情报，或实施部分的修改，其中，RFC3261是现有的标准。
而且，使用的协议或方法可能因为NAT的类型而有所不同。在这些情况下，本发明提供了一种方法，用于在一个NAT环境中使用SIP代理商或代理提供SIP服务，这些SIP代理商或代理可以在所有的NAT类型中通用并且是依照RFC2543的。本发明的实施例为信号处理使用NAT的一个静态映射表以及为媒介处理使用NAPT功能的RTP中继器。
NATs通过使用静态映射表而不考虑NATs的类型把内部访问信息(内部IP地址：端口对)存储为映射到相关公共访问信息(公共IP地址：端口对)的信息。本发明的实施例通过事先映射代理，存储相关信息以及不用任何修改的使用该信息来提供SIP服务。
在SIP协议中，DNS查询用于查找某一代理。因此，在相关NAT中注册的代理的公共访问信息(公共IP地址：端口)会事先在DNS域名服务器中注册。
本发明的实施例将参照一个对称的NAT类型来解释，这种对称的NAT类型是在大学和公司中应用最广泛的方法。
图2描述了应用本发明实施方案的一种网络结构。更确切的说，图2描述了一种SIP服务方法，用于具有NAT的网络中。图2还描述了一个NAT网络域A(300)中的一个用户代理商UA X(310)和一个NAT网络域B(400)中的一个用户代理商UAY(410)之间的数据交换。
如图2所示，域A(300)和或B(400)分别包括NATs(330，430)。SIP代理(320，420)包括在NATs(330，430)中，用于信号处理。SIP代理X’和Y’(320，420)的专用Ips在各自的NATs(330，430)中的静态映射表(340，440)中注册。在NATs(330，430)的外部提供一个RTP中继器(350)用于在NATs(330，430)间传输媒介数据。
代理(SIP代理X’，SIP代理Y’)(320，420)位于NATs的内部，有效的注册NAT内部用户(310，410)和实施通过NATs的设备的通路。代理(320，420)有用于访问NAT内部用户(310，410)的专用IP地址/端口信息。在图2所示的例子中，域A(300)中的代理(320)有专用IP10.0.0.1，域B(400)中的代理(420)有专用1P20.0.0.1。代理(320，420)发送和接收基于静态映射表(340，440)的信号报文并且创建和重置与RTP中继器(350)有关的IP地址/端口。
为了传输媒介流，代理(320，420)检测接收者UAY(410)是否和UAX(310)属于同一个域，并且决定是否使用RTP中继器(350)。如果确定接收者UAY(410)属于不同的域，代理(320，420)通过专用信号与NATs外部的RTP中继器(350)交换信号。
因此，为了从NAT的外部访问相关的代理，可在NAT的静态映射表中注册NAT内部的代理的专用IP地址/端口。这个时候分配的NAT的专用IP地址/端口可以用于连接到NAT的外部。因此，到达NAT的专用IP地址/端口的所有报文被自动发送到映射到相关公共IP地址的代理的专用IP地址/端口。
此外，如果一个代理向NAT的外部发送报文，用映射到代理的专用IP地址/端口的公共IP地址/端口使NAT连接到外部。优选的，代理在要传送到外部的报文中增加转接报头。要传送的转接报头参数，包括在相关NAT的静态映射表中注册的公共IP地址/端口信息(不是相关代理的专用IP地址/端口信息)。
RTP中继器(350)位于NATs(330，430)的外部，促进NATs(330，430)间的媒介传输并且控制从专用侧到公共侧的媒介流的流量。对于这样的RTP中继器(350)，在接收到媒介流之前，在呼叫建立时或在呼叫步骤之前分配IP地址/端口。RTP中继器(350)实施关于源地址/端口和目的地址/端口的NAPT功能。为了实现该目的，NATs(330，430)内部的用户代理商(SIPUAX，SIPUAY)(310，410)有相同的端口用于发送和接收媒介流。
图3根据本发明的一个实施例描述了在具有NATs的网络中的一种用于SIP服务的信号方法。其它的实施例也在本发明的范围之内。图3还描述了从呼叫建立的信号到图2所示网络的媒介流连接过程中的SIP报文的流程图。
用户代理商UA X(310)为用户代理商UAY(410)向代理X’(320)发送SIP请求报文(S301)，代理X’(320)是在和用户代理商UA X(310)位于同一个域的NAT的静态映射表中注册的。SDP报文包括专用IP地址/端口(PXA：px)上的信息，而用户代理商UAX(310)要通过该专用IP地址端口接收RTP数据。
基于代理X’(320)接收到请求报文，RTP中继器(350)建立和存储多路公共IP地址/端口对。这是用于要实施的与代理X’(320)相关的媒介处理的访问信息(S303)。创建的访问信息可能是用在用户代理商UAX(310)的内部操作中的地址/端口(A：py*)和用在用户代理商UAY(410)的内部操作中的地址/端口(A：px*)。RTCP也可以建立基于RTP的绑定。这时，RTP中继器(350)不能识别出NATs的地址/端口信息，用户(310，410)将被绑定。
代理X’(320)在从用户代理商UAX(310)接收到的SDP报文中将专用访问信息(IP地址/端口对)修改成一个多路公共IP地址/端口对并且通过代理Y’(420)向用户代理商UAY(410)发送SIP请求报文(S305)，其中所述的多路公共IP地址/端口对是由RTP中继器(350)创建的，代理Y’(420)是在其它NAT中的静态映射表中注册的。这时候，SDP报文包括由代理X’(320)修改过的RTP中继器(350)的地址/端口(A：px*)。
用户代理商UA Y(410)通过NAT内部的代理Y’(420)向代理X’(320)发送一个响应报文(200 OK)来对请求报文作出响应，这里的NAT就是用户代理商UA Y(410)本身所属的NAT。这时，SDP报文包括专用IP地址/端口(PYA：py)，用户代理商UAY(410)要通过该专用IP地址/端口接收数据。
当代理X’(320)接收到用户代理商UAY(410)的响应报文(200 OK)时，用预先由RTP中继器(350)建立的公共IP地址：端口对中剩余的一个(A：py*)对SDP报文中的专用访问信息(IP地址：端口对)进行修改并且将其发送到用户代理商UAX(310)(S309)。
用户代理商UAX(310)接收到响应报文后(S309)，为了获得NAT绑定值以用于建立语音通信路径，每个用户代理商(310，410)通过向修改过的公共访问信息值发送某个媒介来创建NAT绑定值，该公共访问信息值是在请求报文或响应报文中的SDP报文内的。RTP中继器(350)将以这种方式创建的NAT绑定值映射到先前创建的多路公共值并且这些值被存储起来(S311，S313)。
换言之，用户代理商UAX(310)一接收到响应报文(200 OK)就立刻(或充分的立刻)向RTP中继器(350)发送媒介(如，背景噪音)(S311)。当第一个RTP包被发送到RTP中继器(350)时，RTP中继器(350)存储在RTP包通过NAT期间建立的NAT源地址/端口(NX：px‘)。然后，假设这个地址/端口值是用于到用户代理商UAX(310)的媒介传输的外部代表值，RTP中继器(350)就将来自用户代理商UA Y(410)的所有RTP数据都传送到这个地址/端口(NX：px‘)。
用户代理商UAY(410)在传送响应报文(200 OK)后也立刻(或充分的立刻)传送媒介(S313)。RTP中继器(350)存储NAT源地址/端口(NY：py‘)并且将来自用户代理商UAX(310)的所有RTP数据都传送到这个地址/端口(NY：py‘)。
因此，用户代理商UAX(310)为响应报文发送一个确认(ACK)(S315)然后呼叫建立结束。
接下来，通过使用公共访问信息和RTP中继器(350)所拥有的映射的NAT绑定值，在两个用户代理商(310，410)之间进行媒介传输和接收(S317)。
一旦建立起通过NATs(330，430)的媒介路径，即使相关用户没有行为(如，即使没有语音包传输)，有效报文也会为已建立的绑定的连续激活而定期的被发送出去。
如果用户代理商UAX(310)发送一个结束报文来结束呼叫(S319)，代理X‘(320)把这个结束报文发送给RTP中继器(350)并且在这个RTP中继器中创建的所有相关呼叫的映射绑定值都被删除(删除端口绑定)(S321)。
此外，另一方面，代理X‘(320)把这个结束报文发送给代理Y‘(420)，相应的通知用户代理商UAY(410)。一旦从用户代理商UAY(410)，经过代理Y‘和代理X‘，到用户代理商UAX(310)发送一个响应于这个结束报文的响应报文(200 OK)，媒介可能不会再被传送了。
如上所述，根据本发明，用SIP组件和NATs以及借助于包括一个NAPT功能的RTP中继器来提供SIP方法，其中的NATs不用通过NAT的静态映射表修改或置换。SIP方法可以应用于所有类型的NAT。
前述的实施例和优点仅仅是作为举例，不用于限制本发明。本发明所教导的内容可以容易的应用到其它类型的装置中。本发明的描述只是例证式的，不是用来限制权利要求的范围。对于本领域的技术人员来说多种选择，修改，和变化是显而易见的。

Claims (18)

1.一种会话启动协议(SIP)服务方法包括：
在网络地址转换(NAT)的静态映射表中注册一代理的专用网络协议(IP)地址/端口，该专用IP地址/端口用于从NAT的外部访问该代理；以及
基于到达映射到专用IP地址/端口的NAT的公共IP地址/端口的报文，传送所有的SIP报文给专用IP地址/端口。
2.如权利要求1所述的方法，进一步包括如果代理想把报文传送到NAT的外部，则使用公共IP地址/端口连接NAT的外部。
3.如权利要求2所述的方法，其中，连接到外部包括把转接报头增加到SIP报文中。
4.如权利要求3所述的方法，其中，连接到外部进一步包括在转接报头的参数中注册公共IP地址端口。
5.如权利要求4所述的方法，其中，在转接报头中注册公共IP地址/端口，而不注册代理的专用IP地址/端口。
6.如权利要求4所述的方法，其中，连接到外部进一步包括把报文传送到NAT的外部。
7.一种会话启动协议(SIP)服务方法包括：
从第一用户代理商向第一代理发送SIP请求报文，该第一代理在与第一用户代理商位于同一域的网络地址转换(NAT)的静态映射表中注册；
在实时协议(RTP)中继器里存储多路公共访问信息，该实时协议中继器位于媒介处理过程的域的外部；
在第一代理，将会话描述协议(SDP)报文内的专用访问信息变成一个多路公共访问信息，该报文是在从第一用户代理商接收的；以及
通过在另一个NAT的静态映射表中注册的第二代理给第二用户代理商发送SIP请求报文。
8.如权利要求7所述的方法，进一步包括：
通过第二代理从第二用户代理商向第一代理发送对应于SIP请求报文的响应报文，第二代理位于和第二用户代理商相同的NAT中。
9.如权利要求8所述的方法，进一步包括：
把SDP报文中的专用访问信息值修改成存储在RTP中继器中的多路公共访问信息中的一个，并把响应报文发送给第一用户代理商。
10.如权利要求9所述的方法，进一步包括：
把具体媒介发送给请求报文或者响应报文内的经过修改的公共访问信息值从而创建NAT的绑定值，并且把所创建的绑定值映射到存储在RTP中继器内的多路公共访问信息值。
11.如权利要求10所述的方法，进一步包括使两个用户代理商用存储的公共访问信息和映射的NAT绑定值相互之间发送和接收媒介。
12.如权利要求11所述的方法，其特征在于公共访问信息和映射的NAT绑定值是存储在RTP中继器内的。
13.如权利要求10所述的方法，进一步包括：
在接收到的响应报文时，从第一用户代理商发送确认报文。
14.如权利要求13所述的方法，其特征在于当第一用户代理商接收到响应报文后，该方法进一步包括：
在RTP中继器内存储在RTP包通过NAT期间所产生的NAT源访问信息，认为该源访问信息是第一用户代理商的媒介传送的外部代表值，并且将从第二用户代理商接收到的所有RTP数据发送到该源访问信息。
15.如权利要求13所述的方法，进一步包括：
在第二用户代理商发送完响应报文后，从第二用户代理商发送媒介，在RTP中继器中存储NAT源访问信息，并且将从第一用户代理商接收到的RTP数据发送到NAT源访问信息。
16.如权利要求7所述的方法，其特征在于如果在两个用户代理商之间建立媒介路径用于传输和接收媒介流，为维持已建立的绑定需定时发送激活的报文
17.如权利要求7所述的方法，进一步包括：
如果第一代理从第一用户代理商接收到结束报文，就把这个结束报文发送给RTP中继器；并且
删除在RTP中继器内建立的所有相关呼叫的绑定值从而结束呼叫。
18.如权利要求15所述的方法，其特征在于用户代理商的用于发送媒介的端口和其用于接收媒介的端口是相同的。
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100403729C (zh) * 2004-09-28 2008-07-16 王安生 Sip软交换系统中呼叫控制与媒体流穿越私网的方法
CN100463448C (zh) * 2005-09-02 2009-02-18 中兴通讯股份有限公司 一种网络端口地址转换的实现方法
CN102118527A (zh) * 2009-12-31 2011-07-06 北京大唐高鸿数据网络技术有限公司 一种可穿透私网的VoIP设备管理系统及其方法
CN101090398B (zh) * 2006-06-16 2011-12-28 阿尔卡特朗讯公司 会话起始协议信令代理内环路的检测
CN101453493B (zh) * 2007-12-07 2013-01-02 友讯科技股份有限公司 网络终端装置通过用户代理相互联机的方法
US9008081B2 (en) 2006-12-14 2015-04-14 Rpx Clearinghouse Llc Serving gateway proxies for non-SIP speakers in a next generation network

Families Citing this family (213)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100514196B1 (ko) * 2003-02-14 2005-09-13 삼성전자주식회사 네트웍 어드레스 변환 및 세션 관리 시스템 및 그 방법
TWI257217B (en) * 2003-11-10 2006-06-21 Inst Information Industry Method to detect the form of network address translation
TWI255113B (en) * 2003-11-10 2006-05-11 Inst Information Industry Method of media relay passing through Network Address Translation equipments to be decreased
DE10353925B4 (de) * 2003-11-18 2009-12-24 Nec Europe Ltd. Verfahren zum Austausch von Daten zwischen zwei Hosts
KR100552513B1 (ko) * 2003-12-17 2006-02-14 삼성전자주식회사 브이오아이피 서비스를 제공하는 장치 및 그 방법
US7680065B2 (en) * 2005-01-18 2010-03-16 Cisco Technology, Inc. System and method for routing information packets
TWI245521B (en) * 2004-06-01 2005-12-11 Realtek Semiconductor Corp Network address-port translation device and method
US7574595B2 (en) * 2004-06-22 2009-08-11 Interdigital Technology Corporation Transparent session initiated protocol
US8050272B2 (en) 2004-06-29 2011-11-01 Damaka, Inc. System and method for concurrent sessions in a peer-to-peer hybrid communications network
US8009586B2 (en) 2004-06-29 2011-08-30 Damaka, Inc. System and method for data transfer in a peer-to peer hybrid communication network
US7933260B2 (en) 2004-06-29 2011-04-26 Damaka, Inc. System and method for routing and communicating in a heterogeneous network environment
US7570636B2 (en) 2004-06-29 2009-08-04 Damaka, Inc. System and method for traversing a NAT device for peer-to-peer hybrid communications
US7706401B2 (en) * 2004-08-13 2010-04-27 Verizon Business Global Llc Method and system for providing interdomain traversal in support of packetized voice transmissions
US7602748B2 (en) * 2004-08-13 2009-10-13 Verizon Business Global Llc Fixed-mobile communications with mid-session mode switching
KR100601124B1 (ko) * 2004-08-26 2006-07-19 주식회사 나라비전 Ｓｉｐ 서비스 기반의 ｔｃｐ채널 제공 방법
US7826602B1 (en) * 2004-10-22 2010-11-02 Juniper Networks, Inc. Enabling incoming VoIP calls behind a network firewall
US8200827B1 (en) 2004-10-25 2012-06-12 Juniper Networks, Inc. Routing VoIP calls through multiple security zones
US7948890B2 (en) 2004-12-14 2011-05-24 Industrial Technology Research Institute System and method for providing a communication channel
WO2006081877A1 (de) * 2005-02-03 2006-08-10 Siemens Aktiengesellschaft Verfahren zum routen von internetverbindungen über netzübergänge
KR100673514B1 (ko) * 2005-02-04 2007-01-24 주식회사 파이오링크 ＳｌＰ 로드밸런서에서 레지스터 기능을 수행하는 방법 및이를 수행하는 ＳｌＰ로드밸런서
KR100612252B1 (ko) * 2005-02-28 2006-08-14 삼성전자주식회사 패킷 통신 서비스를 제공하는 시스템 및 그 방법
KR100694206B1 (ko) * 2005-02-28 2007-03-14 삼성전자주식회사 사설망에서의 ｓｉｐ 서비스 제공 장치 및 그 방법
KR100785294B1 (ko) * 2005-02-28 2007-12-12 삼성전자주식회사 패킷 통신 서비스를 제공하는 시스템 및 그 방법
TWI267293B (en) * 2005-03-09 2006-11-21 Plustek Inc Multimedia conference system and method which enables communication between private network and Internet
US7522618B2 (en) * 2005-03-18 2009-04-21 Panasonic Corporation Communication apparatus, communication system and communication method
GB2412461B (en) * 2005-05-05 2006-03-29 Business Serve Plc Method for the remote configuration of voice over IP telephones and voice over IP telephone adapters
KR100727069B1 (ko) * 2005-10-27 2007-06-12 주식회사 케이티프리텔 Ｓｉｐ 기반의 무선 패킷 교환망 시스템에서의 타망 연동방법 및 그 시스템
KR100785307B1 (ko) * 2006-02-01 2007-12-12 삼성전자주식회사 아이피 사설교환기를 통한 데이터 중계 전송 시스템 및 그방법
US8140707B2 (en) 2006-04-24 2012-03-20 Kt Corporation Inter working system
KR100726185B1 (ko) * 2006-04-24 2007-06-11 주식회사 케이티프리텔 서로 다른 ｉｐ 주소를 사용하는 ｉｐ 네트워크 간 연동제공 시스템, 게이트웨이 장치, 서버 및 연동 제공 방법
KR100758971B1 (ko) * 2006-05-09 2007-09-14 주식회사 케이티프리텔 스턴 바인딩 프로토콜을 확장한 스턴 바인딩 메시지를이용하여 서로 다른 ｉｐ 도메인 간의 연동을 위한 통신시스템, 응용 계층 게이트웨이 장치, 스턴 서버 및 통신방법
US8437757B2 (en) * 2006-06-30 2013-05-07 Nokia Corporation Systems for providing peer-to-peer communications
US8204065B2 (en) 2006-09-29 2012-06-19 Avaya Ecs Ltd. Network address translation in session initiation protocol based application
US8929360B2 (en) * 2006-12-07 2015-01-06 Cisco Technology, Inc. Systems, methods, media, and means for hiding network topology
KR100872240B1 (ko) * 2006-12-26 2008-12-05 엘지노텔 주식회사 Ｓｉｐ 기반 통신 서비스 제공시스템 및 그 방법
US20080165683A1 (en) * 2007-01-04 2008-07-10 Debanjan Saha Method, system, and program product for enhancing network communications between endpoints
US9055517B2 (en) * 2007-02-26 2015-06-09 Blackberry Limited System and method of user-directed dynamic domain selection
US7995562B2 (en) * 2007-02-26 2011-08-09 Research In Motion Limited System and method to trigger a mobile device in different domains based on unsuccessful initialization or handover
JP4411332B2 (ja) * 2007-03-20 2010-02-10 パナソニック株式会社 Ｉｐ通信装置及びｉｐ通信システム並びにこれらのｉｐ通信方法
US8725883B2 (en) * 2007-05-11 2014-05-13 Nokia Corporation Method for the establishing of peer-to-peer multimedia sessions in a communication system
US8184622B2 (en) * 2007-07-23 2012-05-22 Samsung Electronics Co., Ltd. Integrated internet telephony system and signaling method thereof
WO2009032854A2 (en) 2007-09-03 2009-03-12 Damaka, Inc. Device and method for maintaining a communication session during a network transition
US8862164B2 (en) 2007-09-28 2014-10-14 Damaka, Inc. System and method for transitioning a communication session between networks that are not commonly controlled
US20090094684A1 (en) * 2007-10-05 2009-04-09 Microsoft Corporation Relay server authentication service
WO2009070718A1 (en) 2007-11-28 2009-06-04 Damaka, Inc. System and method for endpoint handoff in a hybrid peer-to-peer networking environment
FR2925247B1 (fr) * 2007-12-18 2011-11-04 Alcatel Lucent Controle de l'interface d'emission d'un message de reponse sip
CN101911645B (zh) * 2008-01-07 2016-06-08 西门子企业通讯有限责任两合公司 用于验证通信关系的端点之间的密钥信息的方法和端点
US20090185673A1 (en) * 2008-01-17 2009-07-23 Avaya Technology Llc Voice-Over-IP Call Recording in Call Centers
US9456054B2 (en) 2008-05-16 2016-09-27 Palo Alto Research Center Incorporated Controlling the spread of interests and content in a content centric network
US20100040046A1 (en) * 2008-08-14 2010-02-18 Mediatek Inc. Voip data processing method
KR101013996B1 (ko) * 2008-10-10 2011-02-14 플러스기술주식회사 클라이언트의 nat 사용 여부 판단 및 공유대수 검출방법
US8923293B2 (en) 2009-10-21 2014-12-30 Palo Alto Research Center Incorporated Adaptive multi-interface use for content networking
US8892646B2 (en) 2010-08-25 2014-11-18 Damaka, Inc. System and method for shared session appearance in a hybrid peer-to-peer environment
US8874785B2 (en) 2010-02-15 2014-10-28 Damaka, Inc. System and method for signaling and data tunneling in a peer-to-peer environment
US8725895B2 (en) 2010-02-15 2014-05-13 Damaka, Inc. NAT traversal by concurrently probing multiple candidates
US8689307B2 (en) 2010-03-19 2014-04-01 Damaka, Inc. System and method for providing a virtual peer-to-peer environment
US9043488B2 (en) * 2010-03-29 2015-05-26 Damaka, Inc. System and method for session sweeping between devices
US9191416B2 (en) 2010-04-16 2015-11-17 Damaka, Inc. System and method for providing enterprise voice call continuity
US8352563B2 (en) 2010-04-29 2013-01-08 Damaka, Inc. System and method for peer-to-peer media routing using a third party instant messaging system for signaling
US8446900B2 (en) 2010-06-18 2013-05-21 Damaka, Inc. System and method for transferring a call between endpoints in a hybrid peer-to-peer network
US8611540B2 (en) 2010-06-23 2013-12-17 Damaka, Inc. System and method for secure messaging in a hybrid peer-to-peer network
JP4802295B1 (ja) * 2010-08-31 2011-10-26 株式会社スプリングソフト ネットワークシステム及び仮想プライベート接続形成方法
US8468010B2 (en) 2010-09-24 2013-06-18 Damaka, Inc. System and method for language translation in a hybrid peer-to-peer environment
US8743781B2 (en) 2010-10-11 2014-06-03 Damaka, Inc. System and method for a reverse invitation in a hybrid peer-to-peer environment
US9264459B2 (en) * 2010-12-16 2016-02-16 Palo Alto Research Center Incorporated SIP-based custodian routing in content-centric networks
US9178917B2 (en) * 2010-12-16 2015-11-03 Palo Alto Research Center Incorporated Custodian routing with network address translation in content-centric networks
KR101065040B1 (ko) * 2010-12-29 2011-09-19 주식회사 지트론 Ｉｐ단말기 및 클라이언트가 통신하기 위한 통신방법
US8407314B2 (en) 2011-04-04 2013-03-26 Damaka, Inc. System and method for sharing unsupported document types between communication devices
US8694587B2 (en) 2011-05-17 2014-04-08 Damaka, Inc. System and method for transferring a call bridge between communication devices
US8478890B2 (en) 2011-07-15 2013-07-02 Damaka, Inc. System and method for reliable virtual bi-directional data stream communications with single socket point-to-multipoint capability
US20130308628A1 (en) * 2012-05-15 2013-11-21 Viber Media, Inc. Nat traversal for voip
RU2595526C2 (ru) * 2012-07-04 2016-08-27 Хуавэй Текнолоджиз Ко., Лтд. Способ, устройство и система для записи мультимедийных данных
US9280546B2 (en) 2012-10-31 2016-03-08 Palo Alto Research Center Incorporated System and method for accessing digital content using a location-independent name
US9400800B2 (en) 2012-11-19 2016-07-26 Palo Alto Research Center Incorporated Data transport by named content synchronization
US10430839B2 (en) 2012-12-12 2019-10-01 Cisco Technology, Inc. Distributed advertisement insertion in content-centric networks
US9978025B2 (en) 2013-03-20 2018-05-22 Cisco Technology, Inc. Ordered-element naming for name-based packet forwarding
US9935791B2 (en) 2013-05-20 2018-04-03 Cisco Technology, Inc. Method and system for name resolution across heterogeneous architectures
US9185120B2 (en) 2013-05-23 2015-11-10 Palo Alto Research Center Incorporated Method and system for mitigating interest flooding attacks in content-centric networks
US9027032B2 (en) 2013-07-16 2015-05-05 Damaka, Inc. System and method for providing additional functionality to existing software in an integrated manner
US9444722B2 (en) 2013-08-01 2016-09-13 Palo Alto Research Center Incorporated Method and apparatus for configuring routing paths in a custodian-based routing architecture
US9357016B2 (en) 2013-10-18 2016-05-31 Damaka, Inc. System and method for virtual parallel resource management
US9407549B2 (en) 2013-10-29 2016-08-02 Palo Alto Research Center Incorporated System and method for hash-based forwarding of packets with hierarchically structured variable-length identifiers
US9276840B2 (en) 2013-10-30 2016-03-01 Palo Alto Research Center Incorporated Interest messages with a payload for a named data network
US9282050B2 (en) 2013-10-30 2016-03-08 Palo Alto Research Center Incorporated System and method for minimum path MTU discovery in content centric networks
US9401864B2 (en) 2013-10-31 2016-07-26 Palo Alto Research Center Incorporated Express header for packets with hierarchically structured variable-length identifiers
US10101801B2 (en) 2013-11-13 2018-10-16 Cisco Technology, Inc. Method and apparatus for prefetching content in a data stream
US10129365B2 (en) 2013-11-13 2018-11-13 Cisco Technology, Inc. Method and apparatus for pre-fetching remote content based on static and dynamic recommendations
US9311377B2 (en) 2013-11-13 2016-04-12 Palo Alto Research Center Incorporated Method and apparatus for performing server handoff in a name-based content distribution system
US10089655B2 (en) 2013-11-27 2018-10-02 Cisco Technology, Inc. Method and apparatus for scalable data broadcasting
US9503358B2 (en) 2013-12-05 2016-11-22 Palo Alto Research Center Incorporated Distance-based routing in an information-centric network
US9379979B2 (en) 2014-01-14 2016-06-28 Palo Alto Research Center Incorporated Method and apparatus for establishing a virtual interface for a set of mutual-listener devices
US10172068B2 (en) 2014-01-22 2019-01-01 Cisco Technology, Inc. Service-oriented routing in software-defined MANETs
US10098051B2 (en) 2014-01-22 2018-10-09 Cisco Technology, Inc. Gateways and routing in software-defined manets
US9374304B2 (en) 2014-01-24 2016-06-21 Palo Alto Research Center Incorporated End-to end route tracing over a named-data network
US9954678B2 (en) 2014-02-06 2018-04-24 Cisco Technology, Inc. Content-based transport security
US9531679B2 (en) 2014-02-06 2016-12-27 Palo Alto Research Center Incorporated Content-based transport security for distributed producers
US9678998B2 (en) 2014-02-28 2017-06-13 Cisco Technology, Inc. Content name resolution for information centric networking
US10089651B2 (en) 2014-03-03 2018-10-02 Cisco Technology, Inc. Method and apparatus for streaming advertisements in a scalable data broadcasting system
US9836540B2 (en) 2014-03-04 2017-12-05 Cisco Technology, Inc. System and method for direct storage access in a content-centric network
US9473405B2 (en) 2014-03-10 2016-10-18 Palo Alto Research Center Incorporated Concurrent hashes and sub-hashes on data streams
US9626413B2 (en) 2014-03-10 2017-04-18 Cisco Systems, Inc. System and method for ranking content popularity in a content-centric network
US9391896B2 (en) 2014-03-10 2016-07-12 Palo Alto Research Center Incorporated System and method for packet forwarding using a conjunctive normal form strategy in a content-centric network
US9407432B2 (en) 2014-03-19 2016-08-02 Palo Alto Research Center Incorporated System and method for efficient and secure distribution of digital content
US9916601B2 (en) 2014-03-21 2018-03-13 Cisco Technology, Inc. Marketplace for presenting advertisements in a scalable data broadcasting system
US9363179B2 (en) 2014-03-26 2016-06-07 Palo Alto Research Center Incorporated Multi-publisher routing protocol for named data networks
US9363086B2 (en) 2014-03-31 2016-06-07 Palo Alto Research Center Incorporated Aggregate signing of data in content centric networking
US9716622B2 (en) 2014-04-01 2017-07-25 Cisco Technology, Inc. System and method for dynamic name configuration in content-centric networks
US9473576B2 (en) 2014-04-07 2016-10-18 Palo Alto Research Center Incorporated Service discovery using collection synchronization with exact names
US9390289B2 (en) 2014-04-07 2016-07-12 Palo Alto Research Center Incorporated Secure collection synchronization using matched network names
US10075521B2 (en) 2014-04-07 2018-09-11 Cisco Technology, Inc. Collection synchronization using equality matched network names
US9451032B2 (en) 2014-04-10 2016-09-20 Palo Alto Research Center Incorporated System and method for simple service discovery in content-centric networks
TWI565261B (zh) * 2014-04-17 2017-01-01 財團法人資訊工業策進會 用於即時通訊的網路位址轉換穿透系統與方法
US9203885B2 (en) 2014-04-28 2015-12-01 Palo Alto Research Center Incorporated Method and apparatus for exchanging bidirectional streams over a content centric network
US9992281B2 (en) 2014-05-01 2018-06-05 Cisco Technology, Inc. Accountable content stores for information centric networks
US9609014B2 (en) 2014-05-22 2017-03-28 Cisco Systems, Inc. Method and apparatus for preventing insertion of malicious content at a named data network router
US9455835B2 (en) 2014-05-23 2016-09-27 Palo Alto Research Center Incorporated System and method for circular link resolution with hash-based names in content-centric networks
US9276751B2 (en) 2014-05-28 2016-03-01 Palo Alto Research Center Incorporated System and method for circular link resolution with computable hash-based names in content-centric networks
US9516144B2 (en) 2014-06-19 2016-12-06 Palo Alto Research Center Incorporated Cut-through forwarding of CCNx message fragments with IP encapsulation
US9467377B2 (en) 2014-06-19 2016-10-11 Palo Alto Research Center Incorporated Associating consumer states with interests in a content-centric network
US9537719B2 (en) 2014-06-19 2017-01-03 Palo Alto Research Center Incorporated Method and apparatus for deploying a minimal-cost CCN topology
US9426113B2 (en) 2014-06-30 2016-08-23 Palo Alto Research Center Incorporated System and method for managing devices over a content centric network
US9699198B2 (en) 2014-07-07 2017-07-04 Cisco Technology, Inc. System and method for parallel secure content bootstrapping in content-centric networks
US9959156B2 (en) 2014-07-17 2018-05-01 Cisco Technology, Inc. Interest return control message
US9621354B2 (en) 2014-07-17 2017-04-11 Cisco Systems, Inc. Reconstructable content objects
US9729616B2 (en) 2014-07-18 2017-08-08 Cisco Technology, Inc. Reputation-based strategy for forwarding and responding to interests over a content centric network
US9590887B2 (en) 2014-07-18 2017-03-07 Cisco Systems, Inc. Method and system for keeping interest alive in a content centric network
US9535968B2 (en) 2014-07-21 2017-01-03 Palo Alto Research Center Incorporated System for distributing nameless objects using self-certifying names
CA2956617A1 (en) 2014-08-05 2016-02-11 Damaka, Inc. System and method for providing unified communications and collaboration (ucc) connectivity between incompatible systems
US9882964B2 (en) 2014-08-08 2018-01-30 Cisco Technology, Inc. Explicit strategy feedback in name-based forwarding
US9729662B2 (en) 2014-08-11 2017-08-08 Cisco Technology, Inc. Probabilistic lazy-forwarding technique without validation in a content centric network
US9503365B2 (en) 2014-08-11 2016-11-22 Palo Alto Research Center Incorporated Reputation-based instruction processing over an information centric network
US9391777B2 (en) 2014-08-15 2016-07-12 Palo Alto Research Center Incorporated System and method for performing key resolution over a content centric network
US9467492B2 (en) 2014-08-19 2016-10-11 Palo Alto Research Center Incorporated System and method for reconstructable all-in-one content stream
US9800637B2 (en) 2014-08-19 2017-10-24 Cisco Technology, Inc. System and method for all-in-one content stream in content-centric networks
US9497282B2 (en) 2014-08-27 2016-11-15 Palo Alto Research Center Incorporated Network coding for content-centric network
US10204013B2 (en) 2014-09-03 2019-02-12 Cisco Technology, Inc. System and method for maintaining a distributed and fault-tolerant state over an information centric network
US9553812B2 (en) 2014-09-09 2017-01-24 Palo Alto Research Center Incorporated Interest keep alives at intermediate routers in a CCN
US10069933B2 (en) 2014-10-23 2018-09-04 Cisco Technology, Inc. System and method for creating virtual interfaces based on network characteristics
US9590948B2 (en) 2014-12-15 2017-03-07 Cisco Systems, Inc. CCN routing using hardware-assisted hash tables
US9536059B2 (en) 2014-12-15 2017-01-03 Palo Alto Research Center Incorporated Method and system for verifying renamed content using manifests in a content centric network
US10237189B2 (en) 2014-12-16 2019-03-19 Cisco Technology, Inc. System and method for distance-based interest forwarding
US9846881B2 (en) 2014-12-19 2017-12-19 Palo Alto Research Center Incorporated Frugal user engagement help systems
US10003520B2 (en) 2014-12-22 2018-06-19 Cisco Technology, Inc. System and method for efficient name-based content routing using link-state information in information-centric networks
US9473475B2 (en) 2014-12-22 2016-10-18 Palo Alto Research Center Incorporated Low-cost authenticated signing delegation in content centric networking
US9660825B2 (en) 2014-12-24 2017-05-23 Cisco Technology, Inc. System and method for multi-source multicasting in content-centric networks
US9954795B2 (en) 2015-01-12 2018-04-24 Cisco Technology, Inc. Resource allocation using CCN manifests
US9602596B2 (en) 2015-01-12 2017-03-21 Cisco Systems, Inc. Peer-to-peer sharing in a content centric network
US9916457B2 (en) 2015-01-12 2018-03-13 Cisco Technology, Inc. Decoupled name security binding for CCN objects
US9946743B2 (en) 2015-01-12 2018-04-17 Cisco Technology, Inc. Order encoded manifests in a content centric network
US9832291B2 (en) 2015-01-12 2017-11-28 Cisco Technology, Inc. Auto-configurable transport stack
US9462006B2 (en) 2015-01-21 2016-10-04 Palo Alto Research Center Incorporated Network-layer application-specific trust model
US9552493B2 (en) 2015-02-03 2017-01-24 Palo Alto Research Center Incorporated Access control framework for information centric networking
US10333840B2 (en) 2015-02-06 2019-06-25 Cisco Technology, Inc. System and method for on-demand content exchange with adaptive naming in information-centric networks
US10075401B2 (en) 2015-03-18 2018-09-11 Cisco Technology, Inc. Pending interest table behavior
US10116605B2 (en) 2015-06-22 2018-10-30 Cisco Technology, Inc. Transport stack name scheme and identity management
US10075402B2 (en) 2015-06-24 2018-09-11 Cisco Technology, Inc. Flexible command and control in content centric networks
US10616179B1 (en) * 2015-06-25 2020-04-07 Amazon Technologies, Inc. Selective routing of domain name system (DNS) requests
US10701038B2 (en) 2015-07-27 2020-06-30 Cisco Technology, Inc. Content negotiation in a content centric network
US9986034B2 (en) 2015-08-03 2018-05-29 Cisco Technology, Inc. Transferring state in content centric network stacks
US10610144B2 (en) 2015-08-19 2020-04-07 Palo Alto Research Center Incorporated Interactive remote patient monitoring and condition management intervention system
US9832123B2 (en) 2015-09-11 2017-11-28 Cisco Technology, Inc. Network named fragments in a content centric network
US10355999B2 (en) 2015-09-23 2019-07-16 Cisco Technology, Inc. Flow control with network named fragments
US10313227B2 (en) 2015-09-24 2019-06-04 Cisco Technology, Inc. System and method for eliminating undetected interest looping in information-centric networks
US9977809B2 (en) 2015-09-24 2018-05-22 Cisco Technology, Inc. Information and data framework in a content centric network
US10454820B2 (en) 2015-09-29 2019-10-22 Cisco Technology, Inc. System and method for stateless information-centric networking
US10263965B2 (en) 2015-10-16 2019-04-16 Cisco Technology, Inc. Encrypted CCNx
US9794238B2 (en) 2015-10-29 2017-10-17 Cisco Technology, Inc. System for key exchange in a content centric network
US10009446B2 (en) 2015-11-02 2018-06-26 Cisco Technology, Inc. Header compression for CCN messages using dictionary learning
US9807205B2 (en) 2015-11-02 2017-10-31 Cisco Technology, Inc. Header compression for CCN messages using dictionary
US10021222B2 (en) 2015-11-04 2018-07-10 Cisco Technology, Inc. Bit-aligned header compression for CCN messages using dictionary
US10097521B2 (en) 2015-11-20 2018-10-09 Cisco Technology, Inc. Transparent encryption in a content centric network
US9912776B2 (en) 2015-12-02 2018-03-06 Cisco Technology, Inc. Explicit content deletion commands in a content centric network
US10097346B2 (en) 2015-12-09 2018-10-09 Cisco Technology, Inc. Key catalogs in a content centric network
US10078062B2 (en) 2015-12-15 2018-09-18 Palo Alto Research Center Incorporated Device health estimation by combining contextual information with sensor data
US10257271B2 (en) 2016-01-11 2019-04-09 Cisco Technology, Inc. Chandra-Toueg consensus in a content centric network
US9949301B2 (en) 2016-01-20 2018-04-17 Palo Alto Research Center Incorporated Methods for fast, secure and privacy-friendly internet connection discovery in wireless networks
US10305864B2 (en) 2016-01-25 2019-05-28 Cisco Technology, Inc. Method and system for interest encryption in a content centric network
US10043016B2 (en) 2016-02-29 2018-08-07 Cisco Technology, Inc. Method and system for name encryption agreement in a content centric network
US10051071B2 (en) 2016-03-04 2018-08-14 Cisco Technology, Inc. Method and system for collecting historical network information in a content centric network
US10742596B2 (en) 2016-03-04 2020-08-11 Cisco Technology, Inc. Method and system for reducing a collision probability of hash-based names using a publisher identifier
US10003507B2 (en) 2016-03-04 2018-06-19 Cisco Technology, Inc. Transport session state protocol
US10038633B2 (en) 2016-03-04 2018-07-31 Cisco Technology, Inc. Protocol to query for historical network information in a content centric network
US9832116B2 (en) 2016-03-14 2017-11-28 Cisco Technology, Inc. Adjusting entries in a forwarding information base in a content centric network
US10212196B2 (en) 2016-03-16 2019-02-19 Cisco Technology, Inc. Interface discovery and authentication in a name-based network
US11436656B2 (en) 2016-03-18 2022-09-06 Palo Alto Research Center Incorporated System and method for a real-time egocentric collaborative filter on large datasets
US10067948B2 (en) 2016-03-18 2018-09-04 Cisco Technology, Inc. Data deduping in content centric networking manifests
US10091330B2 (en) 2016-03-23 2018-10-02 Cisco Technology, Inc. Interest scheduling by an information and data framework in a content centric network
US10033639B2 (en) 2016-03-25 2018-07-24 Cisco Technology, Inc. System and method for routing packets in a content centric network using anonymous datagrams
US10091025B2 (en) 2016-03-31 2018-10-02 Damaka, Inc. System and method for enabling use of a single user identifier across incompatible networks for UCC functionality
US10320760B2 (en) 2016-04-01 2019-06-11 Cisco Technology, Inc. Method and system for mutating and caching content in a content centric network
US9930146B2 (en) 2016-04-04 2018-03-27 Cisco Technology, Inc. System and method for compressing content centric networking messages
US10425503B2 (en) 2016-04-07 2019-09-24 Cisco Technology, Inc. Shared pending interest table in a content centric network
US10027578B2 (en) 2016-04-11 2018-07-17 Cisco Technology, Inc. Method and system for routable prefix queries in a content centric network
US10404450B2 (en) 2016-05-02 2019-09-03 Cisco Technology, Inc. Schematized access control in a content centric network
US10320675B2 (en) 2016-05-04 2019-06-11 Cisco Technology, Inc. System and method for routing packets in a stateless content centric network
US10547589B2 (en) 2016-05-09 2020-01-28 Cisco Technology, Inc. System for implementing a small computer systems interface protocol over a content centric network
US10063414B2 (en) 2016-05-13 2018-08-28 Cisco Technology, Inc. Updating a transport stack in a content centric network
US10084764B2 (en) 2016-05-13 2018-09-25 Cisco Technology, Inc. System for a secure encryption proxy in a content centric network
US10103989B2 (en) 2016-06-13 2018-10-16 Cisco Technology, Inc. Content object return messages in a content centric network
US10305865B2 (en) 2016-06-21 2019-05-28 Cisco Technology, Inc. Permutation-based content encryption with manifests in a content centric network
US10148572B2 (en) 2016-06-27 2018-12-04 Cisco Technology, Inc. Method and system for interest groups in a content centric network
US10009266B2 (en) 2016-07-05 2018-06-26 Cisco Technology, Inc. Method and system for reference counted pending interest tables in a content centric network
US9992097B2 (en) 2016-07-11 2018-06-05 Cisco Technology, Inc. System and method for piggybacking routing information in interests in a content centric network
US10122624B2 (en) 2016-07-25 2018-11-06 Cisco Technology, Inc. System and method for ephemeral entries in a forwarding information base in a content centric network
US10069729B2 (en) 2016-08-08 2018-09-04 Cisco Technology, Inc. System and method for throttling traffic based on a forwarding information base in a content centric network
US10956412B2 (en) 2016-08-09 2021-03-23 Cisco Technology, Inc. Method and system for conjunctive normal form attribute matching in a content centric network
US10033642B2 (en) 2016-09-19 2018-07-24 Cisco Technology, Inc. System and method for making optimal routing decisions based on device-specific parameters in a content centric network
US10212248B2 (en) 2016-10-03 2019-02-19 Cisco Technology, Inc. Cache management on high availability routers in a content centric network
US10447805B2 (en) 2016-10-10 2019-10-15 Cisco Technology, Inc. Distributed consensus in a content centric network
US10135948B2 (en) 2016-10-31 2018-11-20 Cisco Technology, Inc. System and method for process migration in a content centric network
US10243851B2 (en) 2016-11-21 2019-03-26 Cisco Technology, Inc. System and method for forwarder connection information in a content centric network
CN109561164B (zh) * 2017-09-27 2021-02-09 华为技术有限公司 Nat表项的管理方法、装置及nat设备
CN108810012B (zh) * 2018-07-02 2020-11-10 北京明朝万达科技股份有限公司 基于sip协议的通信方法及装置

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10128493A1 (de) * 2000-06-16 2002-01-03 Ibm System und Verfahren zur Integration der Netzwerkadressen-Übersetzung mit IP-Sicherheit
US7797433B2 (en) * 2000-06-30 2010-09-14 Net2Phone System, method, and computer program product for resolving addressing in a network including a network address translator
AU2000262769A1 (en) * 2000-07-21 2002-02-05 Bertenyi, Balazs Sip sessions between ipv4 and ipv6 clients and sip based call setup in 3gpp ip multimedia subsystem with nat in place
GB2369746A (en) * 2000-11-30 2002-06-05 Ridgeway Systems & Software Lt Communications system with network address translation
US7437474B2 (en) * 2001-02-22 2008-10-14 Intel Corporation Proxy-less packet routing between private and public address realms
AU2002345633A1 (en) * 2001-06-08 2002-12-23 4Th Pass Inc. Method and system for two-way initiated data communication with wireless devices
US7209977B2 (en) * 2001-10-01 2007-04-24 International Business Machines Corporation Method and apparatus for content-aware web switching
US7143188B2 (en) * 2002-06-13 2006-11-28 Nvidia Corporation Method and apparatus for network address translation integration with internet protocol security
US7143137B2 (en) * 2002-06-13 2006-11-28 Nvidia Corporation Method and apparatus for security protocol and address translation integration

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100403729C (zh) * 2004-09-28 2008-07-16 王安生 Sip软交换系统中呼叫控制与媒体流穿越私网的方法
CN100463448C (zh) * 2005-09-02 2009-02-18 中兴通讯股份有限公司 一种网络端口地址转换的实现方法
CN101090398B (zh) * 2006-06-16 2011-12-28 阿尔卡特朗讯公司 会话起始协议信令代理内环路的检测
US9008081B2 (en) 2006-12-14 2015-04-14 Rpx Clearinghouse Llc Serving gateway proxies for non-SIP speakers in a next generation network
CN101453493B (zh) * 2007-12-07 2013-01-02 友讯科技股份有限公司 网络终端装置通过用户代理相互联机的方法
CN102118527A (zh) * 2009-12-31 2011-07-06 北京大唐高鸿数据网络技术有限公司 一种可穿透私网的VoIP设备管理系统及其方法

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