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1. 发明授权

US06917614B1 Multi-channel support for virtual private networks in a packet to ATM cell cable system 有权
标题翻译：多信道支持ATM信元分组中的虚拟专用网络
公开(公告)号：US06917614B1
公开(公告)日：2005-07-12
申请号：US09398267
申请日：1999-09-17
申请人： Mark E. Laubach , Sanford L. Helton , Alireza Raissinia , Paul A. Gordon , Malay M. Thaker , Kathleen M. Nichols
发明人： Mark E. Laubach , Sanford L. Helton , Alireza Raissinia , Paul A. Gordon , Malay M. Thaker , Kathleen M. Nichols
IPC分类号： H04L12/28 , H04L12/46 , H04L12/56
CPC分类号： H04L47/10 , H04L12/2801 , H04L47/15 , H04L47/2416 , H04L47/2491 , H04L47/32 , H04L47/50 , H04L47/527 , H04L47/564 , H04L47/626 , H04L47/823 , H04L49/606 , H04L2012/5606 , H04L2012/5664
摘要： A two-way cable network offering high-speed broadband communications delivered via virtual private networks over a multi-channel shared media system. Bi-directional transmission of packet to ATM cell based communications is established between a head end communication controller and a number of subscriber terminal units, whereby individual cells are prioritized and routed according to a virtual connection. Virtual connections are organized to support multiple virtual private networks in a shared media CATV system. The virtual private network to which a particular STU belongs is user selectable and has the flexibility of handling multi up/downstream channels with different MAC domains. The present invention can also handle non-ATM MAC domains via the same common ATM switch. To overcome the limited number of addresses inherent to common ATM switches, a mapping/remapping function is implemented in the port cards. Furthermore, downstream as well as upstream traffic are filtered at each STU. In one embodiment, information pertaining to downstream traffic is used to implement predictive scheduling in order to improve the timing associated with the request/grant cycle. In another embodiment, a user has the ability to select a quality of service that best suits the needs of the current application. In a further embodiment, the scheduling function is associated with each of the receivers in order to provide improved scalability.
摘要翻译：双向有线网络，通过多渠道共享媒体系统通过虚拟专用网络提供高速宽带通信。在头端通信控制器和多个用户终端单元之间建立了分组到基于ATM信元的通信的双向传输，由此根据虚拟连接对单个小区进行优先级排队和路由。组织虚拟连接以支持共享媒体CATV系统中的多个虚拟专用网络。特定STU所属的虚拟专用网络是用户可选择的，并且具有处理具有不同MAC域的多个上行/下行信道的灵活性。本发明还可以通过相同的公共ATM交换机来处理非ATM MAC域。为了克服普通ATM交换机固有的有限数量的地址，在端口卡中实现映射/重映射功能。此外，在每个STU，对下游流量和上游流量进行过滤。在一个实施例中，使用与下游业务相关的信息来实现预测调度，以便改善与请求/许可周期相关联的定时。在另一个实施例中，用户具有选择最适合当前应用的需要的服务质量的能力。在另一实施例中，调度功能与每个接收机相关联，以便提供改进的可扩展性。

2. 发明授权

US6028860A Prioritized virtual connection transmissions in a packet to ATM cell cable network 失效
标题翻译：将分组中的优先虚拟连接传输到ATM信元有线网络
公开(公告)号：US6028860A
公开(公告)日：2000-02-22
申请号：US731958
申请日：1996-10-23
申请人： Mark E. Laubach , Sanford L. Helton , Alireza Raissinia , Paul A. Gordon , Michael J. Sabin , Malay M. Thaker , Kathleen M. Nichols
发明人： Mark E. Laubach , Sanford L. Helton , Alireza Raissinia , Paul A. Gordon , Michael J. Sabin , Malay M. Thaker , Kathleen M. Nichols
IPC分类号： H04N7/173 , H04L12/56 , H04L27/00 , H04Q11/04 , H04L12/28 , H04H1/00 , H04L12/43 , H04N7/10
CPC分类号： H04Q11/0478 , H04L2012/561 , H04L2012/5638
摘要： Bi-directional communications system in a CATV network utilizing cell-based Asynchronous Transfer Mode (ATM) transmissions. Packet data existing in any one of several different formats are first converted into ATM cells by a headend controller. Individual cells are then assigned a virtual connection by the headend controller. Based on the virtual connection, the cells can be prioritized and routed to their intended destinations. The cells are transmitted in a shared radio frequency spectrum over a standard cable TV network. A subscriber terminal unit demodulates the received RF signal and processes the cells for use in a computer. Likewise, computers may transmit packet data to their respective subscriber terminal units which are sent to the headend controller over the same CATV network. Hence, the present invention offers a flexible, effective, economic, and fully integrated multimedia bearer system granting immediate support for Internet services, traditional voice telephony, and digital video services over a CATV network.
摘要翻译：利用基于单元的异步传输模式（ATM）传输的CATV网络中的双向通信系统。存在于几种不同格式中的任何一种的分组数据首先通过头端控制器转换成ATM信元。然后通过头端控制器分配单个单元的虚拟连接。基于虚拟连接，单元格可以被优先排序并路由到其预期的目的地。这些小区通过标准有线电视网络以共享射频频谱传输。用户终端单元解调所接收的RF信号并处理在计算机中使用的小区。同样，计算机可以将分组数据发送到它们各自的用户终端单元，这些用户终端单元通过相同的CATV网络被发送到头端控制器。因此，本发明提供了一种灵活的，有效的，经济的和完全集成的多媒体承载系统，其通过有线电视网络为互联网服务，传统语音电话和数字视频服务提供即时支持。

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