公开(公告)号：US09325631B2

公开(公告)日：2016-04-26

申请号：US14025584

申请日：2013-09-12

Applicant: STMicroelectronics, Inc. ,  Cisco Technology, Inc.

Inventor： Charaf Hanna ,  Zhifang J. Ni ,  John Wrobbel ,  Benjamin Nelson Darby ,  Andrew Graham Whitlow ,  Gale L. Shallow ,  Maynard Darvel Hammond

IPC: H04L12/54 ,  H04L12/863 ,  H04L12/861 ,  H04N21/426 ,  H04N21/61 ,  H04L12/911

CPC classification number: H04L47/6215 ,  H04L47/74 ,  H04L49/9057 ,  H04N21/42676 ,  H04N21/61 ,  H04N21/6168

Abstract: A system and method for improved upstream data transmission. In an embodiment, a cable modem includes a transceiver configured for transmitting data upstream once permission is granted. In between times when permission to transmit is granted, however, the cable modem is configured to prepare as much data as possible for immediate upstream transmission once that very permission is granted. Thus, prior to permission being granted, the cable modem assembles (pre-processes) the data into transmit frames such that the data frames may be stored in a local memory coupled to the transceiver in a “ready-to-go” format. In this manner, the entire amount of time/bandwidth allocated to the cable modem in response to its request for upstream data transmission may be dedicated to actually transmitting data upstream as opposed to consuming time and bandwidth processing the data into data frames after upstream data transmission has been granted.

Abstract translation: 一种用于改进上游数据传输的系统和方法。 在一个实施例中，电缆调制解调器包括被配置用于在许可被授权之后向上游传输数据的收发器。 然而，在允许发送的时间之间，电缆调制解调器被配置为准备尽可能多的数据，一旦获得了许可，就立即上传传输。 因此，在许可被许可之前，电缆调制解调器将数据组装（预处理）到发送帧中，使得数据帧可以以“即用”格式存储在耦合到收发器的本地存储器中。 以这种方式，响应于其对上游数据传输的请求而分配给电缆调制解调器的时间/带宽的总量可以专用于实际发送数据上行，而不是在上行数据传输之后消耗时间和带宽处理数据到数据帧 已被授予。

公开(公告)号：US09237109B2

公开(公告)日：2016-01-12

申请号：US14025607

申请日：2013-09-12

Applicant: STMicroelectronics, Inc. ,  Cisco Technology, Inc.

Inventor： Gale L. Shallow ,  Benjamin Nelson Darby ,  Jonathan Evans ,  Maynard Darvel Hammond ,  Zhifang J. Ni ,  Charaf Hanna

IPC: H04L12/28 ,  H04L12/823 ,  H04L12/801 ,  H04N21/61 ,  H04L12/743

CPC classification number: H04L47/323 ,  H04L45/7453 ,  H04L47/193 ,  H04N21/61 ,  H04N21/6118

Abstract: A system and method suited for improved overall data transmission having a hardware-based transceiver configured for transmitting upstream data with suppressed data packets. In TCP sessions between devices, a server seeks an “acknowledgement” that the downstream data transmission has been received by a client. Some data packets sent upstream may contain only TCP acknowledgement data and therefore may be combined with other purely TCP acknowledgement data packets in order to reduce the impact of the TCP acknowledgement packets on the overall upstream data throughput. In addition, this results in increased TCP performance in the downstream transmission direction as well because the algorithm enables replacing earlier arriving ACK packets with later arriving ACK packets which allows the device to send all TCP ACK information known to the suppressor at the earliest possible time.

Abstract translation: 一种适于改进总体数据传输的系统和方法，具有基于硬件的收发器，所述收发器被配置为用压缩的数据分组发送上行数据。 在设备之间的TCP会话中，服务器寻求客户端接收到下游数据传输的“确认”。 上游发送的一些数据包可能仅包含TCP确认数据，因此可以与其他纯TCP确认数据包组合，以减少TCP确认数据包对总体上行数据吞吐量的影响。 此外，这也导致在下游传输方向上提高的TCP性能，因为该算法能够用稍后到达的ACK分组来替换先前到达的ACK分组，这允许设备在最早的可能时间发送抑制器已知的所有TCP ACK信息。

公开(公告)号：US09363209B1

公开(公告)日：2016-06-07

申请号：US14020625

申请日：2013-09-06

Applicant: CISCO TECHNOLOGY, INC. ,  STMicroelectronics, Inc.

Inventor： Glendon Leo Akins, III ,  Gale L. Shallow ,  Charaf Hanna ,  Andrew Graham Whitlow ,  Zhifang Ni ,  Benjamin Nelson Darby ,  Maynard Darvel Hammond

IPC: H04L12/28 ,  H04L12/939

CPC classification number: H04L49/9057 ,  H04L49/9078

Abstract: A method is provided in one example and includes receiving a plurality of packets; identifying whether a particular packet, of the plurality of packets, is part of a sequenced flow; identifying whether a particular sequence number of the particular packet is being received within a time window; identifying whether the particular packet was a next expected packet for a particular flow; and forwarding the particular packet to a next destination. In more particular embodiments, packet inspection is used to set one or more flags for identifying characteristics associated with the plurality of packets. Certain packets in non-sequenced flows are routed directly from an input interface to an output interface of a resequencer module using a flow-through packet path.

Abstract translation: 在一个示例中提供了一种方法，包括接收多个分组; 识别所述多​​个分组中的特定分组是否是顺序流的一部分; 识别在时间窗口内是否正在接收到特定分组的特定序列号; 识别特定分组是否是用于特定流的下一个预期分组; 并将特定分组转发到下一个目的地。 在更具体的实施例中，使用分组检查来设置用于识别与多个分组相关联的特征的一个或多个标志。 非排序流中的某些数据包使用流通分组路径从输入接口直接路由到重新排序器模块的输出接口。

公开(公告)号：US09313131B2

公开(公告)日：2016-04-12

申请号：US14025749

申请日：2013-09-12

Applicant: STMICROELECTRONICS, INC. ,  CISCO TECHNOLOGY, INC.

Inventor： Maynard Darvel Hammond ,  Charaf Hanna ,  Zhifang J. Ni ,  Andrew Graham Whitlow ,  Benjamin Nelson Darby ,  Gale L. Shallow

IPC: H04L12/28 ,  H04L12/743 ,  H04L12/56 ,  H04L12/761

CPC classification number: H04L45/7457 ,  H04L12/2801 ,  H04L45/16 ,  H04L45/741

Abstract: A filter in a DOCSIS bridge performs IP Filtering of incoming Ethernet packets in hardware. The filter includes a parser circuit which, in hardware, parses each of the incoming Ethernet packets and then utilizes the parsed information in combination with a content-addressable memory (CAM) that stores filtering information, to filter and route the incoming Ethernet packets. Detailed statistical data may also be generated to provide information on the type of filtering being performed by the DOCSIS bridge.

Abstract translation: DOCSIS网桥中的一个过滤器在硬件中执行传入的以太网数据包的IP过滤。 该过滤器包括解析器电路，其在硬件中解析每个进入的以太网分组，然后将解析的信息与存储过滤信息的内容寻址存储器（CAM）结合使用，以过滤和路由输入的以太网分组。 还可以生成详细的统计数据以提供关于由DOCSIS桥执行的过滤类型的信息。