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    • 1. 发明申请
    • Method for Implementing Multicast in Virtual Router-Based Virtual Private Network
    • 在基于虚拟路由器的虚拟专用网中实现组播的方法
    • US20070147372A1
    • 2007-06-28
    • US11554310
    • 2006-10-30
    • Enhui LiuChunyue ZhouYue ZhangHongke Zhang
    • Enhui LiuChunyue ZhouYue ZhangHongke Zhang
    • H04B7/216H04L12/56
    • H04L12/4641H04L12/18H04L12/4633H04L45/00H04L45/04H04L45/16H04L45/48H04L45/586
    • A method for implementing multicast in a Virtual Router-based Virtual Private Network (VR-VPN), including: establishing a local multicast tree in each VPN site and a Service Provider (SP) multicast tree connecting each VPN site; setting a Proxy Source/Rendezvous Point (RP) for a multicast source on each VR; the multicast source transmitting multicast data to the Proxy Source/RP on an ingress VR, the Proxy Source/RP forwarding the multicast data to a local receiver along the local multicast tree, and transmitting the multicast data to an egress VR along the SP multicast tree after encapsulating the multicast data; the egress VR de-encapsulating the multicast data and discarding the multicast data or forwarding the multicast data to the local site according to local state. The present invention may improve the transmission efficiency, and reduces multicast on backbone routers, thereby improving the scalability of the network.
    • 一种在基于虚拟路由器的虚拟专用网(VR-VPN)中实现组播的方法,包括:在每个VPN站点建立本地组播树,以及连接每个VPN站点的服务提供商(SP)组播树; 在每个VR上为组播源设置代理源/集合点(RP); 组播源在入口VR上向组播源/ RP发送组播数据,代理源/ RP沿着本地组播树将组播数据转发给本地接收者,并将组播数据沿SP组播树发送到出口VR 封装组播数据后; 出口VR根据本地状态解封装组播数据,丢弃组播数据或将组播数据转发到本地站点。 本发明可以提高传输效率,减少骨干路由器上的组播,从而提高网络的可扩展性。
    • 2. 发明授权
    • Method of multicast source filtering
    • 组播源过滤方法
    • US07593402B2
    • 2009-09-22
    • US11518325
    • 2006-09-08
    • Xiaofeng SongXiaodan ChenHongke ZhangEnhui Liu
    • Xiaofeng SongXiaodan ChenHongke ZhangEnhui Liu
    • H04L12/56
    • H04L12/18H04L45/00H04L45/16
    • A method for filtering multicast sources, so that when the multicast routing protocol is based on the Source-Specific Multicast (SSM) model, resource consumption of inquiry routers can be reduced and the multicast packet forwarding efficiency can be improved. In the present invention, the inquiry router determines whether it is the Any-Source Multicast (ASM) model or the SSM model that the multicast routing protocol running in the network is based on. If it is the ASM model, maintain the source filtering method in the related art. If it is the SSM model, cancel the source filtering process or only performing the source filtering process in the inclusive mode. In the situation that only the source filtering process in the inclusive mode is performed, the additional filtering mode switching function or static configuration by software guarantees that the inquiry router is only in the inclusive mode, thereby avoiding the mode switching.
    • 一种过滤组播源的方法,当组播路由协议基于源特定组播(SSM)模型时,可以减少查询路由器的资源消耗,提高组播报文的转发效率。 在本发明中,查询路由器确定是否是在网络中运行的组播路由协议基于的任意源组播(ASM)模型或SSM模型。 如果是ASM模型,请在相关技术中维护源过滤方法。 如果是SSM模型,请取消源过滤处理或仅在包含模式下执行源过滤处理。 在仅执行包含模式的源过滤处理的情况下,通过软件的附加过滤模式切换功能或静态配置保证了查询路由器仅处于包容性模式,从而避免了模式切换。
    • 3. 发明申请
    • Method of multicast source filtering
    • 组播源过滤方法
    • US20070064695A1
    • 2007-03-22
    • US11518325
    • 2006-09-08
    • Xiaofeng SongXiaodan ChenHongke ZhangEnhui Liu
    • Xiaofeng SongXiaodan ChenHongke ZhangEnhui Liu
    • H04L12/56
    • H04L12/18H04L45/00H04L45/16
    • A method for filtering multicast sources, so that when the multicast routing protocol is based on the Source-Specific Multicast (SSM) model, resource consumption of inquiry routers can be reduced and the multicast packet forwarding efficiency can be improved. In the present invention, the inquiry router determines whether it is the Any-Source Multicast (ASM) model or the SSM model that the multicast routing protocol running in the network is based on. If it is the ASM model, maintain the source filtering method in the related art. If it is the SSM model, cancel the source filtering process or only performing the source filtering process in the inclusive mode. In the situation that only the source filtering process in the inclusive mode is performed, the additional filtering mode switching function or static configuration by software guarantees that the inquiry router is only in the inclusive mode, thereby avoiding the mode switching.
    • 一种过滤组播源的方法,当组播路由协议基于源特定组播(SSM)模型时,可以减少查询路由器的资源消耗,提高组播报文的转发效率。 在本发明中,查询路由器确定是否是在网络中运行的组播路由协议基于的任意源组播(ASM)模型或SSM模型。 如果是ASM模型,请在相关技术中维护源过滤方法。 如果是SSM模型,请取消源过滤处理或仅在包含模式下执行源过滤处理。 在仅执行包含模式的源过滤处理的情况下,通过软件的附加过滤模式切换功能或静态配置保证了查询路由器仅处于包容性模式,从而避免了模式切换。
    • 4. 发明申请
    • System and method for mobile host implementing multicast service
    • 移动主机实现组播业务的系统和方法
    • US20070053357A1
    • 2007-03-08
    • US11525879
    • 2006-09-22
    • Enhui LiuBo ShenHongke ZhangYulan Liu
    • Enhui LiuBo ShenHongke ZhangYulan Liu
    • H04L12/56
    • H04L12/18H04W80/04H04W88/14
    • A system and a method for a Mobile Host (MH) implementing a multicast service, wherein each MH corresponds to a Dynamic multicast Agent (DMA); the DMA needs to implement dynamic switch according to the path that the MH passes when moving; if the DMA of the MH is switched to the MSA of the current multicast sub-network, the MH joins the multicast group directly, thereby optimizing the transmission path of the multicast. The present invention can not only make the multicast distributing tree reconstruction caused by moving of the MH less frequent, but also avoid a too long tunnel form between the DMA and the MSA of a foreign multicast sub-networks, thereby optimizing the transmission path of the multicast packet. The present invention can also make the best use of network resources, and prevent the DMA from becoming the bottleneck of network communication while avoiding tunnel congregation.
    • 一种用于实现多播服务的移动主机(MH)的系统和方法,其中每个MH对应于动态多播代理(DMA); DMA需要根据MH在移动时通过的路径来实现动态切换; 如果MH的DMA切换到当前组播子网的MSA,则MH直接加入组播组,从而优化组播的传输路径。 本发明不仅可以使由移动MH引起的组播分发树重构较少频繁,而且可以避免外部组播子网的DMA与MSA之间的过长的隧道形式,从而优化传输路径 组播数据包。 本发明还可以充分利用网络资源,防止DMA成为网络通信的瓶颈,同时避免隧道聚集。
    • 5. 发明申请
    • Method of preparing polymethylene-polyphenyl-polyamine
    • 聚亚甲基 - 多苯基多胺的制备方法
    • US20080249261A1
    • 2008-10-09
    • US11873056
    • 2007-10-16
    • Jiansheng DingJianfeng ChenHongke ZhangHaikui ZouWeiqi HuaPengyuan ZhangShuchang SunGuangwen ChuLimin Xu
    • Jiansheng DingJianfeng ChenHongke ZhangHaikui ZouWeiqi HuaPengyuan ZhangShuchang SunGuangwen ChuLimin Xu
    • C08F2/01
    • C08G73/0266C08L79/02
    • The present invention provides a method of preparing polymethylene-polyphenyl-polyamine (briefly referred to as polyamine, DAM), in which a high gravity rotating bed is used as the mixing reactor of formaldehyde and aniline hydrochloride, the mixing solution of aniline hydrochloride and circulation solution and the formaldehyde are fed into the high gravity rotating bed reactor proportionally to carry out mixing and condensation reaction under a condition of a very high gravity; the materials leaving the high gravity rotating bed reactor is introduced into a stirred vessel to proceed with the pre-condensation reaction and obtain a condensation solution; and the process steps of heating, molecular rearrangement, neutralization, water washing and purification, etc. are completed to obtain the refined DAM. With the method according to the present invention, the main by-products is obviously reduced in the condensation process, the phenomenon of deposit attaching to the inner walls of circulation pipes and heat exchanger and blockage are prevented in the condensation process, the impurity content is low in the refined DAM, and the subsequent product MDI has a lighter color, the product quality is stable and may be improved to a certain extent.
    • 本发明提供了使用高重力旋转床作为甲醛和苯胺盐酸盐的混合反应器的多亚甲基 - 多苯基多胺(简称为多胺,DAM)的制备方法,盐酸苯胺和循环的混合溶液 溶液和甲醛按比例进料到高重力旋转床反应器中,以在非常高的重力条件下进行混合和缩合反应; 将离开高重力旋转床反应器的材料引入搅拌容器中以进行预缩合反应并获得缩合溶液; 完成加热,分子重排,中和,水洗净化等工艺步骤,得到精制DAM。 根据本发明的方法,冷凝过程中主要副产物明显减少,在冷凝过程中防止了附着在循环管内壁和热交换器上的沉积现象,堵塞现象,杂质含量为 精炼DAM低,后续产品MDI颜色较浅,产品质量稳定,可在一定程度上提高。
    • 10. 发明授权
    • Method of preparing polymethylene-polyphenyl-polyamine
    • 聚亚甲基 - 多苯基多胺的制备方法
    • US07893301B2
    • 2011-02-22
    • US11873056
    • 2007-10-16
    • Jiansheng DingJianfeng ChenHongke ZhangHaikui ZouWeiqi HuaPengyuan ZhangShuchang SunGuangwen ChuLimin Xu
    • Jiansheng DingJianfeng ChenHongke ZhangHaikui ZouWeiqi HuaPengyuan ZhangShuchang SunGuangwen ChuLimin Xu
    • C07C211/00
    • C08G73/0266C08L79/02
    • The present invention provides a method of preparing polymethylene-polyphenyl-polyamine (briefly referred to as polyamine, DAM), in which a high gravity rotating bed is used as the mixing reactor of formaldehyde and aniline hydrochloride, the mixing solution of aniline hydrochloride and circulation solution and the formaldehyde are fed into the high gravity rotating bed reactor proportionally to carry out mixing and condensation reaction under a condition of a very high gravity; the materials leaving the high gravity rotating bed reactor is introduced into a stirred vessel to proceed with the pre-condensation reaction and obtain a condensation solution; and the process steps of heating, molecular rearrangement, neutralization, water washing and purification, etc. are completed to obtain the refined DAM. With the method according to the present invention, the main by-products is obviously reduced in the condensation process, the phenomenon of deposit attaching to the inner walls of circulation pipes and heat exchanger and blockage are prevented in the condensation process, the impurity content is low in the refined DAM, and the subsequent product MDI has a lighter color, the product quality is stable and may be improved to a certain extent.
    • 本发明提供了使用高重力旋转床作为甲醛和苯胺盐酸盐的混合反应器的多亚甲基 - 多苯基多胺(简称为多胺,DAM)的制备方法,盐酸苯胺和循环的混合溶液 溶液和甲醛按比例进料到高重力旋转床反应器中,以在非常高的重力条件下进行混合和缩合反应; 将离开高重力旋转床反应器的材料引入搅拌容器中以进行预缩合反应并获得缩合溶液; 完成加热,分子重排,中和,水洗净化等工艺步骤,得到精制DAM。 根据本发明的方法,冷凝过程中主要副产物明显减少,在冷凝过程中防止了附着在循环管内壁和热交换器上的沉积现象,堵塞现象,杂质含量为 精炼DAM低,后续产品MDI颜色较浅,产品质量稳定,可在一定程度上提高。