公开(公告)号：US06639920B2

公开(公告)日：2003-10-28

申请号：US10102912

申请日：2002-03-22

申请人： Yoshito Sakurai ,  Shinobu Gohara ,  Kenichi Ohtsuki ,  Takao Kato ,  Hiroshi Kuwahara ,  Eiichi Amada

发明人： Yoshito Sakurai ,  Shinobu Gohara ,  Kenichi Ohtsuki ,  Takao Kato ,  Hiroshi Kuwahara ,  Eiichi Amada

IPC分类号： H04J326

CPC分类号： H04L49/30 ,  H04J2203/0012 ,  H04L12/56 ,  H04L12/5601 ,  H04L12/6402 ,  H04L49/101 ,  H04L49/106 ,  H04L49/15 ,  H04L49/1553 ,  H04L49/1584 ,  H04L49/205 ,  H04L49/25 ,  H04L49/254 ,  H04L49/255 ,  H04L49/256 ,  H04L49/3009 ,  H04L49/3018 ,  H04L49/3081 ,  H04L49/309 ,  H04L49/35 ,  H04L2012/5651 ,  H04L2012/5652 ,  H04L2012/5681 ,  H04L2012/6481 ,  H04Q11/0407 ,  H04Q11/0421 ,  H04Q11/06

摘要： A switching system for integratedly switching voice, data, image information and the like. The switching system comprises a plurality of front-end modules each adapted to perform a switching processing in association with a subscriber line or a trunk line, and a single or a plurality of central modules for interconnecting the plurality of front-end modules in star-type fashion and switching information prevailing between the front-end modules, in unit of block accommodating the information and a header added thereto to contain connection control information and in accordance with the contents of the header. The front-end modules are connected to the central module via inter-module highways each having frames occurring at a predetrmined period and time slots contained in each frame to carry blocks.

公开(公告)号：US06580722B1

公开(公告)日：2003-06-17

申请号：US09138586

申请日：1998-08-21

申请人： Radia J. Perlman

发明人： Radia J. Perlman

IPC分类号： H04J326

CPC分类号： H04L12/1836 ,  H04L12/185 ,  H04L12/1886

摘要： Data units are tunneled through topological restrictions that reside in a path between a first network device and a second network device. For example, a remote network device that resides outside of the domain of a multicast group obtains access to the multicast group by tunneling through the boundary of the domain. A proxy device within the domain functions as a member of the multicast group on behalf of the remote network device. Data units that are transmitted from the remote network device to the proxy device are tunneled to the multicast group via the proxy device. Data units that are transmitted from the multicast group to the proxy device are tunneled to the remote network device via the proxy device.

摘要翻译： 数据单元通过驻留在第一网络设备和第二网络设备之间的路径中的拓扑限制进行隧道传送。 例如，驻留在组播组域之外的远程网络设备通过隧道通过域的边界获得对多播组的访问。 域内的代理设备作为组播组的成员，代表远程网络设备。 从远程网络设备传输到代理设备的数据单元通过代理设备被隧道传输到组播组。 从组播组发送到代理设备的数据单元通过代理设备被隧道传输到远程网络设备。

公开(公告)号：US06542514B1

公开(公告)日：2003-04-01

申请号：US09220748

申请日：1998-12-23

申请人： Koichi Yamada

发明人： Koichi Yamada

IPC分类号： H04J326

CPC分类号： H04L12/1881 ,  H04L47/12 ,  H04L47/15 ,  H04L47/28

摘要： A broadcast communication system comprises a transmitting terminal which is effective to transmit broadcast data and a start time of the broadcast data. A first message processing device receives the broadcast data and the start data from the transmitting terminal. The first message processing device transmits the broadcast data based on a schedule and the start time to a second message processing device. The second message processing device receives the broadcast data and the start time from the first message processing device and generates executable broadcast traffic information based on prior traffic information and based on the start time. The second message processing device further selectively conveys the broadcast data to one of a plurality of receiving terminals. The second message processing device further forwards the executable broadcast traffic information to the first message processing device. The first message processing device produces the schedule of the broadcast data based on the executable broadcast traffic information.

摘要翻译： 广播通信系统包括有效发送广播数据的发送终端和广播数据的开始时间。 第一消息处理装置从发送终端接收广播数据和开始数据。 第一消息处理设备基于时间表和开始时间将广播数据发送到第二消息处理设备。 第二消息处理设备从第一消息处理设备接收广播数据和开始时间，并且基于先前的交通信息并基于开始时间生成可执行广播交通信息。 第二消息处理装置进一步选择性地将广播数据传送到多个接收终端之一。 第二消息处理装置还将可执行广播业务信息转发到第一消息处理装置。 第一消息处理设备基于可执行广播业务信息产生广播数据的调度。

公开(公告)号：US06392993B1

公开(公告)日：2002-05-21

申请号：US09106403

申请日：1998-06-29

申请人： Keith S. Hamilton ,  Robert Steven Meizlik

发明人： Keith S. Hamilton ,  Robert Steven Meizlik

IPC分类号： H04J326

CPC分类号： H04L47/283 ,  H04L12/1877 ,  H04L12/1895 ,  H04L47/10 ,  H04L47/12 ,  H04L47/323 ,  H04L47/35

摘要： In a network with a sending system networked to at least one receiving system, it is sometimes desirable to transfer relatively short messages between the sending system and one or more receiving systems in a highly reliable yet highly efficient manner. The present invention defines two short message protocols, one of which relies on a statistical model and the other of which uses positive acknowledgement to track receipt of transmitted packets by intended recipient. The statistical reliability mode is based on the observation that for each packet in a message that is transmitted, the probability that at least one packet of the message is received by a given system increases. Thus, in the statistical reliability mode messages are divided into a guaranteed minimum number of packets, with additional packets being added if the message length is insufficient to fill the minimum number of packets. The positive reliability mode of the present invention periodically sets an acknowledgement flag in the packets transmitted for a message. Receiving systems send an acknowledgement in response to receipt of that packet. The sending system tracks receipt of acknowledgements by intended recipient and retransmits any unacknowledged packets so as to positively assure the packets are received. Receiving systems send negative acknowledgements to request retransmission of missing packets. Negative acknowledgement suppression is implemented at both the sender and receiver to prevent a flood of negative acknowledgements from overwhelming the network. Packets are transmitted by the sending system at a transmission rate selected to avoid any adverse impact on the packet loss rate of the network.

摘要翻译： 在具有联网到至少一个接收系统的发送系统的网络中，有时期望以高度可靠但高效的方式在发送系统和一个或多个接收系统之间传送相对较短的消息。 本发明定义了两个短消息协议，其中之一依赖于统计模型，另一个协议使用肯定确认来跟踪预期接收者发送的分组的接收。 统计可靠性模式基于对于发送的消息中的每个分组的观察，由给定系统接收到消息的至少一个分组的概率增加。 因此，在统计可靠性模式中，如果消息长度不足以填充最小数量的分组，则消息被分成保证的最小数量的分组，其中添加附加分组。 本发明的正可靠性模式在针对消息发送的分组中周期性地设置确认标志。 接收系统响应收到该分组而发送确认。 发送系统跟踪预期接收者的确认的接收，并重发任何未确认的分组，以便确保接收到分组。 接收系统发送否定确认请求重传丢失的数据包。 在发送方和接收方都实施负确认抑制，以防止大量的否定确认压倒网络。 分组由发送系统以选择的传输速率发送，以避免对网络的分组丢失率的任何不利影响。

公开(公告)号：US06389025B2

公开(公告)日：2002-05-14

申请号：US09873280

申请日：2001-06-05

申请人： Yoshito Sakurai ,  Shinobu Gohara ,  Kenichi Ohtsuki ,  Takao Kato ,  Hiroshi Kuwahara ,  Eiichi Amada

发明人： Yoshito Sakurai ,  Shinobu Gohara ,  Kenichi Ohtsuki ,  Takao Kato ,  Hiroshi Kuwahara ,  Eiichi Amada

IPC分类号： H04J326

CPC分类号： H04L49/30 ,  H04J2203/0012 ,  H04L12/56 ,  H04L12/5601 ,  H04L12/6402 ,  H04L49/101 ,  H04L49/106 ,  H04L49/15 ,  H04L49/1553 ,  H04L49/1584 ,  H04L49/205 ,  H04L49/25 ,  H04L49/254 ,  H04L49/255 ,  H04L49/256 ,  H04L49/3009 ,  H04L49/3018 ,  H04L49/3081 ,  H04L49/309 ,  H04L49/35 ,  H04L2012/5651 ,  H04L2012/5652 ,  H04L2012/5681 ,  H04L2012/6481 ,  H04Q11/0407 ,  H04Q11/0421 ,  H04Q11/06

摘要： A switching system for integratedly switching voice, data, image information and the like. The switching system comprises a plurality of front-end modules each adapted to perform a switching processing in association with a subscriber line or a trunk line, and a single or a plurality of central modules for interconnecting the plurality of front-end modules in star-type fashion and switching information prevailing between the front-end modules, in unit of block accommodating the information and a header added thereto to contain connection control information and in accordance with the contents of the header. The front-end modules are connected to the central module via inter-module highways each having frames occurring at a predetrmined period and time slots contained in each frame to carry blocks.

摘要翻译： 一种用于集成地切换语音，数据，图像信息等的切换系统。 交换系统包括多个前端模块，每个前端模块适于与用户线路或中继线路相关联地执行切换处理;以及单个或多个中央模块，用于以星形模式互连多个前端模块， 在前端模块之间存在的类型时尚和切换信息，以容纳信息的块为单位，以及添加到其中的标题，以包含连接控制信息并根据报头的内容。 前端模块通过模块间高速公路连接到中央模块，每个模块都具有在预定周期内发生的帧，并且包含在每个帧中的时隙以承载块。

公开(公告)号：US06208651B1

公开(公告)日：2001-03-27

申请号：US09094204

申请日：1998-06-09

申请人： Robbert Van Renesse ,  Mark Hayden

发明人： Robbert Van Renesse ,  Mark Hayden

IPC分类号： H04J326

CPC分类号： H04L29/06 ,  H04L69/22 ,  H04L69/32

摘要： The Protocol Accelerator is a system which significantly reduces the communication latency of complex layered communication protocols. In particular, the protocol accelerator reduces both the message header overhead imposed by layered protocols and the message processing overhead by employing such techniques as classifying, collecting and aligning the headers, using shorter identifiers to represent information in immutable fields of the headers, introducing pre- and post-processing of a message, packet filtering, and packing and unpacking of messages in cases where a backlog of messages has to be processed by the protocol accelerator.

摘要翻译： 协议加速器是一种显着降低复杂分层通信协议的通信延迟的系统。 特别地，协议加速器通过采用诸如分类，收集和对齐报头之类的技术，使用较短的标识符来表示分组协议所施加的消息报头开销和消息处理开销来表示标题的不可变字段中的信息， 并且在协议加速器必须处理积压的消息的情况下，对消息的后处理，分组过滤以及消息的打包和解包。

公开(公告)号：US06810044B1

公开(公告)日：2004-10-26

申请号：US09453486

申请日：1999-12-17

申请人： Andre Szczepanek

发明人： Andre Szczepanek

IPC分类号： H04J326

CPC分类号： G06F13/1668

摘要： The present invention is a method and system for managing memory in a communication device which operates in a shared access media environment. In one aspect of the invention, each incoming broadcast frame of data has an associated reference mask to indicate through which of a number of channels the frame of data is to be transmitted.

摘要翻译： 本发明是一种用于管理在共享存取媒体环境中工作的通信设备中的存储器的方法和系统。 在本发明的一个方面，每个输入的广播数据帧具有相关联的参考掩码，用于指示数据帧中的哪一个数据帧将被发送。

公开(公告)号：US06771665B1

公开(公告)日：2004-08-03

申请号：US09652762

申请日：2000-08-31

申请人： Scott K. Reed ,  Gregory Weber ,  Mark Eklund ,  Robert Sargent ,  Steven J. Rich

发明人： Scott K. Reed ,  Gregory Weber ,  Mark Eklund ,  Robert Sargent ,  Steven J. Rich

IPC分类号： H04J326

CPC分类号： H04L63/0807

摘要： A solution for matching RADIUS request packets with corresponding RADIUS response packets when the number of simultaneous outstanding requests is greater than 256 involves using a sixteen-octet authenticator field in each packet. For each response packet that arrives, the identifier of the packet is compared in turn with the identifier of each outstanding request packet. If the identifiers match, the authenticators are then compared. If the results of the comparison indicate a match, the packet is accepted and no further processing of the outstanding requests is required. Otherwise, a search of the outstanding request packets is continued. This solution allows for more than 256 simultaneous outstanding RADIUS requests and only encounters a mismatch or ambiguous match with a probability of one in 3.4×1038 packets.

摘要翻译： 当同时未决请求数大于256时，将RADIUS请求报文与对应的RADIUS响应报文进行匹配的解决方案涉及到在每个报文中使用十八字节认证字段。 对于到达的每个响应分组，分组的标识符依次与每个未决请求分组的标识符进行比较。 如果标识符匹配，则验证器被比较。 如果比较结果表示匹配，则该数据包被接受，并且不需要进一步处理未完成的请求。 否则，继续搜索未完成的请求数据包。 该解决方案允许超过256个同时未完成的RADIUS请求，并且仅遇到不符合或不确定的匹配，其中3.4x10 <38>数据包中的概率为1。

公开(公告)号：US06751230B1

公开(公告)日：2004-06-15

申请号：US09317775

申请日：1999-05-24

申请人： Mark O. Vogel ,  Ali Akgun

发明人： Mark O. Vogel ,  Ali Akgun

IPC分类号： H04J326

CPC分类号： H04L12/66

摘要： A head-end in a data-over-cable system transmits a multicast message in a downstream channel to all the cable modems in a particular MAC layer. The message includes an address field that contains an upstream channel multicast MAC address that identifies a particular channel, and is used to send a multicast message for which only cable modems transmitting in the upstream direction in that channel are to respond. When the message is received by the cable modems, the cable modems compare the upstream channel multicast MAC address with addresses stored in a memory. If a match is found, indicating that the cable modem happens to transmit in the upstream direction in the particular channel, it processes the message. If no match is found, the message is discarded. The upstream channel multicast MAC address helps noise avoidance or redundancy problems associated with a particular channel to be quickly remedied, and avoids the head-end from having to send out a large number of unicast messages in order to communicate with all the modems sharing a given upstream channel.

摘要翻译： 数据通过电缆系统中的前端将下行信道中的多播消息发送到特定MAC层中的所有电缆调制解调器。 消息包括包含识别特定信道的上行信道多播MAC地址的地址字段，并且用于发送仅在该信道中沿上行方向发送的电缆调制解调器将响应的多播消息。 当电缆调制解调器接收到消息时，电缆调制解调器将上行信道多播MAC地址与存储在存储器中的地址进行比较。 如果找到一个匹配，指示电缆调制解调器恰好在特定信道的上行方向发送，则处理该消息。 如果没有找到匹配，该消息将被丢弃。 上行信道组播MAC地址有助于消除与特定信道相关联的噪声回避或冗余问题，以便快速修复，并避免头端必须发送大量单播消息，以便与共享给定的所有调制解调器通信 上行通道。

公开(公告)号：US06483849B1

公开(公告)日：2002-11-19

申请号：US09291000

申请日：1999-04-14

申请人： Michael Richard Bray ,  Geetha Rangan

发明人： Michael Richard Bray ,  Geetha Rangan

IPC分类号： H04J326

CPC分类号： H04L12/2898 ,  H04L12/2856 ,  H04L12/4616

摘要： A novel multi-port network transceiver having an LED interface supporting parallel and serial LED modes. The LED interface has a pair of LED pins for each port. In the parallel LED mode, one pin of this pair represents status of a 10 Mb/s communication, whereas another pin represents status of a 100 Mb/s communication. In the serial LED mode, status information for all ports is transferred using 3 pins supplying a serial data stream, a frame signal and a clock signal. The serial data stream is composed of frames, each of which represents various events for the multiple ports. The frame signal is used to identify the boundary between the frames. The transfer of the serial data stream is synchronous to the clock signal.

摘要翻译： 一种新颖的多端口网络收发器，具有支持并行和串行LED模式的LED接口。 LED接口每个端口都有一对LED引脚。 在并联LED模式下，该对的一个引脚表示10 Mb / s通信的状态，而另一个引脚表示100 Mb / s通信的状态。 在串行LED模式下，所有端口的状态信息都使用提供串行数据流，帧信号和时钟信号的3个引脚传输。 串行数据流由帧组成，每个帧表示多个端口的各种事件。 帧信号用于识别帧之间的边界。 串行数据流的传输与时钟信号同步。