公开(公告)号：US06721805B1

公开(公告)日：2004-04-13

申请号：US09439951

申请日：1999-11-12

申请人： Pravin Bhagwat ,  Chatschik Bisdikian ,  Frank James Janniello ,  Ibrahim Korpeoglu ,  Mahmoud Naghshineh ,  Puneet Pandoh

发明人： Pravin Bhagwat ,  Chatschik Bisdikian ,  Frank James Janniello ,  Ibrahim Korpeoglu ,  Mahmoud Naghshineh ,  Puneet Pandoh

IPC分类号： G06F1516

CPC分类号： H04L69/32 ,  H04L69/08 ,  H04L69/323 ,  H04L69/324

摘要： The present invention provides shared communication medium capability to the plethora of computer devices, like the PCCAs, that normally are able to communicate with other devices via dedicated point-to-point links, e.g., via the practically universal RS-232 ports. It allows the sharing of the communication medium in a dynamic fashion depending on the instantaneous traffic demands by the various communicating devices. It further allows the emulation of point-to-point links over the shared communications medium in such a way that applications running on a PCCA use the shared medium transparently. Thus, this invention enables applications designed to operate over a point-to-point connection to operate over the shared medium without any modifications of the applications or the point-to-point devices. It enables the shared medium communications and dynamic communication resource allocation by using a device's I/O ports designed for point-to-point communications with dedicated communication resource allocation.

摘要翻译： 本发明为诸如通常能够通过专用点对点链路与其他设备通信的计算机设备（例如通过实际上通用的RS-232端口）通常提供共享的通信介质能力。 它允许根据各种通信设备的即时业务需求以动态方式共享通信介质。 它进一步允许在共享通信介质上仿真点对点链路，使得在PCCA上运行的应用使用共享媒体是透明的。 因此，本发明使得能够通过点对点连接进行操作的应用能够在共享介质上进行操作，而无需对应用或点对点设备进行任何修改。 它通过使用设计用于与专用通信资源分配进行点对点通信的设备的I / O端口来实现共享介质通信和动态通信资源分配。

公开(公告)号：US06651105B1

公开(公告)日：2003-11-18

申请号：US09439952

申请日：1999-11-12

申请人： Pravin Bhagwat ,  Chatschik Bisdikian ,  Ibrahim Korpeoglu ,  Mahmoud Naghshineh

发明人： Pravin Bhagwat ,  Chatschik Bisdikian ,  Ibrahim Korpeoglu ,  Mahmoud Naghshineh

IPC分类号： G06F1516

CPC分类号： H04L63/0428 ,  H04L29/06 ,  H04L63/08 ,  H04L67/14 ,  H04L69/08 ,  H04L69/16 ,  H04L69/168 ,  H04L69/32 ,  H04L69/323 ,  H04L69/324 ,  H04W80/04

摘要： The present invention provides a method, apparatus and computer product for a mobile device to roam securely and seamlessly from one access point to another access point without disrupting an active PPP connection. The method includes establishing, maintaining, and terminating a PPP connection between a mobile device and a PPP server via an access point, wherein the mobile device is equipped with a serial asynchronous communication interface. The PPP server is attached to a packet switched data network, and the access point is acting as a bridge between the serial communication interface and the packet switched communication interface. Also provided is a method to emulate a direct RS-232 cable connection between a mobile device and another computer located several hops away from the mobile device. It provides a method of keeping the RS-232 cable emulation between the mobile device an another computer system intact despite changes in mobile device's location in the network. It also provides a method of exchanging cookies between peers at the PPP connection establishment time and using them for fast reauthentication. This is a secure method of switching from one PPP proxy to another PPP proxy without disrupting the end to end PPP connection.

摘要翻译： 本发明提供一种用于移动设备从一个接入点到另一个接入点安全无缝地漫游而不中断活跃的PPP连接的方法，设备和计算机产品。 该方法包括通过接入点建立，维护和终止移动设备和PPP服务器之间的PPP连接，其中移动设备配备有串行异步通信接口。 PPP服务器连接到分组交换数据网络，接入点作为串行通信接口和分组交换通信接口之间的桥梁。 还提供了一种模拟移动设备与位于离移动设备几跳的另一计算机之间的直接RS-232电缆连接的方法。 它提供了一种将移动设备之间的RS-232电缆仿真保持在另一计算机系统的方法，尽管移动设备在网络中的位置发生变化。 它还提供了一种在PPP连接建立时间间在对等体之间交换cookie的方法，并使用它们进行快速重新认证。 这是一种从一个PPP代理切换到另一个PPP代理的安全方法，而不会中断PPP端连接。