公开(公告)号：US5570366A

公开(公告)日：1996-10-29

申请号：US443793

申请日：1995-05-18

申请人： Murray C. Baker ,  Roger Y. M. Cheung ,  Partha P. Bhattacharya ,  Roberto M. Kobo ,  Eduardo M. Kolbe ,  Mahmoud Naghshineh

发明人： Murray C. Baker ,  Roger Y. M. Cheung ,  Partha P. Bhattacharya ,  Roberto M. Kobo ,  Eduardo M. Kolbe ,  Mahmoud Naghshineh

IPC分类号： H04L12/46 ,  H04W4/06 ,  H04W88/10 ,  H04J3/02

摘要： In communication systems which include high speed wired local area networks (LANs) and low speed wireless LANs, the bandwidth of the wireless LANs can be severely impacted. It has been found that many broadcast or multicast messages which are forwarded to the wireless LANs are not required as the mobile terminals which would receive the messages are not required to act on them. The present invention provides a means and method to filter out unneeded messages so that they do not impact the bandwidth of the wireless network. Each access point for each wireless LAN maintains a table of parameters for each associated mobile terminal in the connected wireless LAN. The parameters in that table are compared to the parameters in message frames received by the access point and only those messages having parameters found in the table are put on the wireless LAN. The level of filtering can be controlled by specifying which parameters are to be used for filtering messages. The tables at each access point are maintained current by moving table entries from access point to access point as mobile terminals move from wireless LAN to wireless LAN and by removing inactive table entries from the table when a predetermined interval of inactivity is encountered and a terminal is determined to be no longer in active contact with the access point.

摘要翻译： 在包括高速有线局域网（LAN）和低速无线LAN的通信系统中，无线LAN的带宽可能受到严重影响。 已经发现，不需要转发到无线LAN的许多广播或多播消息，因为将不需要接收消息的移动终端对它们起作用。 本发明提供了一种滤除不需要的消息使得它们不影响无线网络的带宽的手段和方法。 每个无线LAN的每个接入点维护连接的无线LAN中每个相关移动终端的参数表。 该表中的参数与接入点接收到的消息帧中的参数进行比较，只有表中发现的具有参数的消息才放在无线LAN上。 可以通过指定哪些参数用于过滤消息来控制过滤的级别。 当移动终端从无线局域网移动到无线局域网时，通过将表条目从接入点移动到接入点，并且当遇到预定的不活动时间间隔，并且终端是 确定不再与接入点保持联系。

公开(公告)号：US5490139A

公开(公告)日：1996-02-06

申请号：US314554

申请日：1994-09-28

申请人： Murray C. Baker ,  Partha P. Bhattacharya ,  Jeane S.-C. Chen ,  Roger Y. M. Cheung ,  Arvind Krishna ,  Peter E. Reissner ,  Mahmoud Naghshineh

发明人： Murray C. Baker ,  Partha P. Bhattacharya ,  Jeane S.-C. Chen ,  Roger Y. M. Cheung ,  Arvind Krishna ,  Peter E. Reissner ,  Mahmoud Naghshineh

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04W40/24 ,  H04W40/28 ,  H04W40/36 ,  H04W92/02 ,  H04B7/26 ,  H04L12/66

CPC分类号： H04W92/02 ,  H04L45/00 ,  H04L45/34 ,  H04W40/248 ,  H04W40/28 ,  H04W40/36

摘要： A method of routing packets through a fixed source routing communications network from and to mobile units. With this invention an initial access point is determined when a communications session is established to or from a mobile unit through the network. Location information is updated each time the mobile unit moves out of the range of one access point and into the range of another access point of the network. When packets for the session are to be transmitted to the mobile unit from the wired network, the packets are forwarded from the initial access point to a current access point, which by definition is in the range of the mobile unit. When packets for the session are to be transmitted from the mobile unit and to the wired network, the access point intercepts these packets and routes them to their destination and/or initiates route discovery to those destinations. When packets are to be transmitted between mobiles at different access points. The packets are sent between the current access points and not through the home access points.

摘要翻译： 一种通过固定源路由通信网络从和移动单元路由数据包的方法。 利用本发明，当通过网络建立通信会话或从移动单元建立通信会话时确定初始接入点。 每当移动单元移出一个接入点的范围并进入网络的另一接入点的范围时，更新位置信息。 当会话的分组将从有线网络发送到移动单元时，分组从初始接入点转发到当前接入点，其定义在移动单元的范围内。 当会话的分组要从移动单元和有线网络传输时，接入点拦截这些分组并将它们路由到目的地和/或发起到这些目的地的路由发现。 当分组将在不同接入点的移动台之间传输时。 分组在当前接入点之间发送，而不是通过家庭接入点发送。

公开(公告)号：US06587466B1

公开(公告)日：2003-07-01

申请号：US09320903

申请日：1999-05-27

申请人： Partha P. Bhattacharya ,  Sanjay D. Kamat ,  Rajendran R. Rajan ,  Saswati Sarkar

发明人： Partha P. Bhattacharya ,  Sanjay D. Kamat ,  Rajendran R. Rajan ,  Saswati Sarkar

IPC分类号： H04L1228

CPC分类号： H04L41/0893 ,  H04L47/2441

摘要： An apparatus, a search tree structure, methods and computer devices for constructing and using the structure to efficiently accomplish policy based service differentiation in packet networks is presented. This invention reduces the number of steps performed to implement packet classification. It uses a method of preprocessing a given set of policy rules by modeling the conditions in the rules as multidimensional hyper-cubes, a simple and compact search tree is constructed. Using this search tree, packet classification is achieved determining all applicable policies for a packet with a few compare and branch instructions.

摘要翻译： 提出了一种用于构建和使用该结构以有效地完成分组网络中的基于策略的服务差异的装置，搜索树结构，方法和计算机装置。 本发明减少了实现分组分类所执行的步骤数量。 它使用通过将规则中的条件建模为多维超立方体来预处理给定的策略规则集的方法，构建了一个简单而紧凑的搜索树。 使用这个搜索树，实现了分组分类，确定了具有少量比较和分支指令的分组的所有适用策略。