[原创]

liuguo_hello

<p class="MsoNormal" align="center" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 0cm; TEXT-ALIGN: center; mso-char-indent-count: 0;"><b><span lang="EN-US" style="FONT-SIZE: 16pt; LINE-HEIGHT: 150%; mso-bidi-font-size: 12.0pt;"><font face="Times New Roman">BGW</font></span></b><b><span style="FONT-SIZE: 16pt; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">组网方式先容</span></b><b><span lang="EN-US" style="FONT-SIZE: 16pt; LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><p></p></span></b></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0;"><font size="3"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">由于</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><font face="Times New Roman">IP</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">地址的缺乏，目前各运营商的网络中存在私网现象，一般来说私网都独自规划</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><font face="Times New Roman">IP</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">地址，且通过</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><font face="Times New Roman">NAT</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">设备与公网相连，利用基于端口的</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><font face="Times New Roman">NAT</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">转换，用有限的公网</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><font face="Times New Roman">IP</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">实现私网用户的数据业务。</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><p></p></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0;"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">这种方式显然不适用于软交换系统下的终端，因为这种方式只能转换数据包网络层的源</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">地址和传输层中的源端口号，将之替换成公网的</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">和相应的端口号，而软交换和终端设备的互通过程中有很多信息是在传输层上的应用层中传递的。</span><span lang="EN-US"><font face="Times New Roman">NAT</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">设备并不能对之转换。</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20.9pt;"><font size="3"><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">宽带网关设备</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><font face="Times New Roman">ZXSS10 BGW</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">正是为解决公私网互通的问题而开发的产品。它不但可以对网络和传输层中的地址和端口进行转换，还可对应用层中的内容进行处理。</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">根据用户私有网络规模及设备配备不同，</span><span lang="EN-US"><font face="Times New Roman">BGW</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">主要有以下两种典型的应用场合：</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 38.9pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; tab-stops: list 38.9pt; mso-list: l0 level1 lfo1;"><font size="3"><font face="Times New Roman"><span lang="EN-US" style="mso-fareast-font-family: &quot;Times New Roman&quot;;"><span style="mso-list: Ignore;">1、</span></span><span lang="EN-US">BGW</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">放置于公网与私网用户之间，这种环境，一般用户私网规模相对较大（在一百线以上），</span><span lang="EN-US"><font face="Times New Roman">ZTE</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">为每个用户私网配置一个</span><span lang="EN-US"><font face="Times New Roman">BGW</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">，</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><font face="Times New Roman">BGW</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">一个网口接私网，配置私网地址，一个网口接公网，配置公网地址；</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt 38.9pt; TEXT-INDENT: -18pt; mso-char-indent-count: 0; tab-stops: list 38.9pt; mso-list: l0 level1 lfo1;"><font size="3"><font face="Times New Roman"><span lang="EN-US" style="mso-fareast-font-family: &quot;Times New Roman&quot;;"><span style="mso-list: Ignore;">2、</span></span><span lang="EN-US">BGW</span></font><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">放置于公网中，两个网口都配置公网地址，私网中的用户通过</span><span lang="EN-US"><font face="Times New Roman">NAT</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">与</span><span lang="EN-US"><font face="Times New Roman">BGW</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">相连，</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><font face="Times New Roman">BGW</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">可</span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">供多个私网使用。这种环境，一般用户私网规模相对较小（在几线至几十线左右），每个用户私网都配置了用于与公网基于数据业务互通的</span><span lang="EN-US"><font face="Times New Roman">NAT</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">设备。</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 0;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;"><font size="3">下面分别先容两种组网方式的工作原理。</font></span><a name="_Toc43708257"></a></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; mso-char-indent-count: 0;"><font size="3"><span style="mso-bookmark: _Toc43708257;"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">一</span></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">、</span><span lang="EN-US"><font face="Times New Roman">BGW</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">放置于公网与私网用户之间</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20.9pt;"><font size="3"><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><font face="Times New Roman">BGW</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">在网络中，位于用户私网与运营商公网之间，完成地址转换及用户接入控制功能。</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><p></p></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20.9pt;"><font size="3"><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><font face="Times New Roman">BGW</font></span><span style="LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">在网络中的位置如下图所示：</span><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><p></p></span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20.9pt;"><span lang="EN-US" style="LINE-HEIGHT: 150%; mso-bidi-font-size: 10.5pt;"><shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" opreferrelative="t" ospt="75" coordsize="21600,21600"><stroke joinstyle="miter"></stroke><formulas><f eqn="if lineDrawn pixelLineWidth 0"></f><f eqn="sum @0 1 0"></f><f eqn="sum 0 0 @1"></f><f eqn="prod @2 1 2"></f><f eqn="prod @3 21600 pixelWidth"></f><f eqn="prod @3 21600 pixelHeight"></f><f eqn="sum @0 0 1"></f><f eqn="prod @6 1 2"></f><f eqn="prod @7 21600 pixelWidth"></f><f eqn="sum @8 21600 0"></f><f eqn="prod @7 21600 pixelHeight"></f><f eqn="sum @10 21600 0"></f></formulas><path oconnecttype="rect" gradientshapeok="t" oextrusionok="f"></path><lock aspectratio="t" vext="edit"></lock></shapetype><shape id="_x0000_i1025" type="#_x0000_t75" style="WIDTH: 414.75pt; HEIGHT: 311.25pt;"><imagedata otitle="BGW" src="file:///C:\DOCUME~1\xadata\LOCALS~1\Temp\msohtml1\01\clip_image001.jpg"><font size="3"></font></imagedata></shape><p></p></span></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 24pt; mso-char-indent-count: 2.0;"><font size="3"><span lang="EN-US"><font face="Times New Roman">BGW</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">放置于运营商公网与用户私网之间，通过两个以太网接口分别与两网相连，并实现两网间的互通。</span></font><a name="_Toc43708259"></a></p><span style="mso-bookmark: _Toc43708259;"></span><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20.9pt;"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">考虑到不同的用户私网可能采用相同的私网地址进行规划，当它们均要接入运营商公网时，单纯根据</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">地址难以定位到指定的用户私网的某一设备。</span><span lang="EN-US"><font face="Times New Roman">ZTE Softswitch</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">系统为用户私网的每一台设备（如</span><span lang="EN-US"><font face="Times New Roman">MG</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">、</span><span lang="EN-US"><font face="Times New Roman">IAD</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">、智能终端等）分配一个独一无二的域名，将根据域名与</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">地址绑定的方式完成用户私网设备的寻址。</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20.9pt;"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">私网中的终端的</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">包到达</span><span lang="EN-US"><font face="Times New Roman">BGW</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">后，</span><span lang="EN-US"><font face="Times New Roman">BGW</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">会将</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">包中的源私网地址和端口号转换成</span><span lang="EN-US"><font face="Times New Roman">BGW</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">的外口的公网地址和端口号，且如果应用层中有内容涉及到私网地址和端口号也会进行相应的转换，且将目的</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">和端口号转换成</span><span lang="EN-US"><font face="Times New Roman">SS</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">的</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">和相应的端口号。转换后会有一张表将之对应起来，并且要和域名对应起来。这个</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">包会发给</span><span lang="EN-US"><font face="Times New Roman">SS</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">。</span><span lang="EN-US"><font face="Times New Roman">SS</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">收到的</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">包的源地址已是公网地址，是可达的，所以回应时</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">包会发向</span><span lang="EN-US"><font face="Times New Roman">BGW</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">的外口。</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20.9pt;"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">同样</span><span lang="EN-US"><font face="Times New Roman">BGW</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">从</span><span lang="EN-US"><font face="Times New Roman">SS</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">收到</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">包后也会进行逆向的转换，根据上面的对应关系，将</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">包的源地址和端口号转换成内网口的私网地址和相应的端口号，目的地址和端口号转换成终端的私网</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">地址和端口号，且将应用层中的相应</span><span lang="EN-US"><font face="Times New Roman">IP</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">地址和端口号也要进行相应的转换。</span></font></p><p class="MsoNormal" style="MARGIN: 0cm 0cm 0pt; TEXT-INDENT: 20.9pt;"><font size="3"><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">这样一来，终端和</span><span lang="EN-US"><font face="Times New Roman">SS</font></span><span style="FONT-FAMILY: 宋体; mso-ascii-font-family: &quot;Times New Roman&quot;; mso-hansi-font-family: &quot;Times New Roman&quot;;">之间就可以正常通讯了，无论时信令还是语音包，都可最终到达其真是的目的地。</span></font></p>