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1. 发明授权

US5521928A Time slot exchanger mechanism in a network for data communication having isochronous capability 失效
标题翻译：用于具有同步能力的数据通信网络中的时隙交换机构
公开(公告)号：US5521928A
公开(公告)日：1996-05-28
申请号：US439440
申请日：1995-05-11
申请人： Debra J. Worsley , Brian C. Edem , Michael S. Evans
发明人： Debra J. Worsley , Brian C. Edem , Michael S. Evans
IPC分类号： F02B75/02 , H04L12/44 , H04L12/64 , H04J3/06 , H04L12/427
CPC分类号： H04L12/6418 , H04L12/44 , F02B2075/025 , H04L2012/644 , H04L2012/6454 , H04L2012/6459
摘要： An apparatus and method for transferring data between two entities in a time slot interchange fashion. The apparatus and method includes a buffer memory comprised of three sections to accommodate up to one cycle of skew between the two independently operating entities. Cycle start detection logic coupled to the two entities controls or, as implemented in the preferred embodiment, designates a physical location within the buffer memory for each of the three sections upon receipt of cycle start reference signals from the two entities.
摘要翻译：一种用于以时隙交换方式在两个实体之间传送数据的装置和方法。该装置和方法包括缓冲存储器，其由三个部分组成，以容纳两个独立操作实体之间的多达一个歪斜周期。或者，如在优选实施例中所实施的，循环启动检测逻辑，在从两个实体接收到周期开始参考信号时，为三个部分中的每一个指定缓冲存储器内的物理位置。

2. 发明授权

US5440556A Low power isochronous networking mode 失效
标题翻译：低功率同步组网模式
公开(公告)号：US5440556A
公开(公告)日：1995-08-08
申请号：US146723
申请日：1993-11-01
申请人： Brian C. Edem , Debra J. Worsley , Michael S. Evans
发明人： Brian C. Edem , Debra J. Worsley , Michael S. Evans
IPC分类号： H04L12/56 , H04L7/00 , H04L12/28 , H04L12/44 , H04L12/64 , H04L29/08 , H04B1/38 , H04J3/06
CPC分类号： H04L12/44 , H04L12/64 , H04L12/6418 , H04L2012/6437 , H04L2012/6448 , H04L2012/6459
摘要： A data communication system, such as a local area network, is provided with a capability of transmitting isochronous data. The system conveys both isochronous data and non-isochronous data by time-multiplexing the data into a recurring frame structure on a four-bit nibble basis. The arriving data is de-multiplexed at the hub into separate channels for handling the separate streams by appropriate hardware. When no calls are in progress, a low power mode enables two ends of a network link to reduce power consumption by transmitting a single pulse once every 125 microseconds in lieu of transmitting an entire cycle template. Synchronization while in low power mode allows circuitry at both ends of a network link to remain synchronized to a single reference clock.
摘要翻译：诸如局域网的数据通信系统被提供有传输同步数据的能力。该系统通过以4比特半字节将数据时分复用为循环帧结构来传送同步数据和非同步数据。到达的数据在集线器处被解复用为单独的信道，以通过适当的硬件来处理单独的流。当没有呼叫进行时，低功率模式使网络链路的两端通过每125微秒传输一次脉冲来代替传输整个周期模板来降低功耗。在低功耗模式下的同步允许网络链路两端的电路与单个参考时钟保持同步。

3. 发明授权

US5406559A Isochronous link protocol 失效
标题翻译：同步链路协议
公开(公告)号：US5406559A
公开(公告)日：1995-04-11
申请号：US970313
申请日：1992-11-02
申请人： Brian C. Edem , Debra J. Worsley , Michael S. Evans
发明人： Brian C. Edem , Debra J. Worsley , Michael S. Evans
IPC分类号： H04L12/56 , H04L7/00 , H04L12/28 , H04L12/44 , H04L12/64 , H04L29/08 , H04J3/06
CPC分类号： H04L12/44 , H04L12/64 , H04L12/6418 , H04L2012/6437 , H04L2012/6448 , H04L2012/6459
摘要： A data transfer delay compensation system for a data communications system having a first transceiver and a second transceiver wherein the first transceiver includes circuitry for transferring an external cycle reference signal and a cycle delay signal to the second transceiver. The second transceiver includes circuitry for transmitting the received cycle reference back to the first transceiver a given time period after receipt of the cycle reference. The first transceiver receives the cycle reference transmitted from the second transceiver and measures a phase difference between the received cycle reference and the external cycle reference signal in order to update the cycle delay signal.
摘要翻译：一种用于具有第一收发器和第二收发器的数据通信系统的数据传输延迟补偿系统，其中所述第一收发器包括用于将外部周期参考信号和周期延迟信号传送到所述第二收发器的电路。第二收发器包括用于在接收到循环参考之后的给定时间周期将接收的周期参考值发送回第一收发器的电路。第一收发器接收从第二收发器发射的周期参考，并测量接收周期参考和外部周期参考信号之间的相位差，以更新周期延迟信号。

4. 发明授权

US5550802A Data communication network with management port for isochronous switch 失效
标题翻译：数据通信网络，带等时切换管理端口
公开(公告)号：US5550802A
公开(公告)日：1996-08-27
申请号：US385086
申请日：1995-02-07
申请人： Debra J. Worsley , Geetha N. K. Rangan , Brian C. Edem , Michael S. Evans
发明人： Debra J. Worsley , Geetha N. K. Rangan , Brian C. Edem , Michael S. Evans
IPC分类号： F02B75/02 , H04L12/44 , H04L12/64 , H04J3/12
CPC分类号： H04L12/6418 , H04L12/44 , F02B2075/025 , H04L2012/644 , H04L2012/6454 , H04L2012/6459
摘要： The present invention provides for communication of data to and from isochronous data sources and sinks. Preferably, a portion of bandwidth on the link is also dedicated to convey data to and from non-isochronous sources and sinks, as well as to permit conveying housekeeping information (such as information relating to data sources and destinations) and status and control maintenance information. A management port is included in the isochronous switching devices to allow monitoring or diagnostic access to the serial isochronous data stream to and from all physical layer portion connections. Accessing one connection's data stream does not affect normal operation of the other connections.
摘要翻译：本发明提供数据与等时数据源和汇的通信。优选地，链路上的带宽的一部分还专用于将数据传送到非等时源和汇，并且允许传送内务信息（例如与数据源和目的地有关的信息）以及状态和控制维护信息。等时切换设备中包括一个管理端口，以允许监视或诊断访问与所有物理层部分连接的串行同步数据流。访问一个连接的数据流不会影响其他连接的正常操作。

5. 发明授权

US5506846A Local loopback of isochronous data in a switching mechanism 失效
标题翻译：交换机制中的同步数据本地环回
公开(公告)号：US5506846A
公开(公告)日：1996-04-09
申请号：US226403
申请日：1994-04-12
申请人： Brian C. Edem , Debra J. Worsley , Michael S. Evans
发明人： Brian C. Edem , Debra J. Worsley , Michael S. Evans
IPC分类号： H04J3/22 , H04L12/44 , H04L12/46 , H04L12/64
CPC分类号： H04L12/44 , H04L12/64 , H04L12/6418 , H04L2012/6437 , H04L2012/6448 , H04L2012/6459
摘要： A data communication system such as a local area network or a wide area network capable of transmitting isochronous data. The system conveys both isochronous data and non-isochronous data by time multiplexing data into a recurring frame structure on a 4-bit nibble basis. The arriving data is de-multiplexed at a hub into separate channels which are forwarded to separate hardware appropriate for handling the particular data stream. The data is passed hierarchically from a source, through a node, and to a hub. The hub places the data into an internal connection memory for switching onto a high bandwidth bus for distribution to other destination hubs, nodes, or sinks, except, where the source node and destination node are attached to the same hub, the hub provides a local loopback to the destination node, thus avoiding the need to place the transmitted data onto the bus. This system conserves room on the bus for other isochronous and non-isochronous data.
摘要翻译：数据通信系统，例如能够发送等时数据的局域网或广域网。该系统通过将数据时间复用为4比特半字节的重复帧结构来传送同步数据和非同步数据。到达的数据在集线器处被解复用为分离的信道，这些信道被转发到适于处理特定数据流的独立硬件。数据从源，通过节点和集线器分层传递。集线器将数据放入内部连接存储器中，用于切换到高带宽总线以分发到其他目标集线器，节点或接收器，除了源节点和目标节点附加到同一集线器之外，集线器提供本地环回到目的地节点，从而避免将发送的数据放置在总线上的需要。该系统节省了其他同步和非同步数据的总线空间。

6. 再颁专利

USRE39405E1 Network link endpoint capability detection 有权
标题翻译：网络链路端点能力检测
公开(公告)号：USRE39405E1
公开(公告)日：2006-11-21
申请号：US09443250
申请日：1999-11-12
申请人： Brian C. Edem , Debra J. Worsley
发明人： Brian C. Edem , Debra J. Worsley
IPC分类号： H04L12/413
CPC分类号： H04L12/6418 , H04L12/44 , H04L29/06 , H04L49/351 , H04L69/18 , H04L69/323 , H04L2012/6437 , H04L2012/6451 , H04L2012/6454 , H04L2012/6459
摘要： Support for a mixed network environment is provided which can contain multiple isochronous and/or non-isochronous LAN protocols such as isochronous-ethernet, ethernet, isochronous-token ring, token ring, other isochronous-LAN or other LAN systems. Support for a mixed environment includes a protocol detection mechanism which is embodied in a handshaking scheme. This handshaking scheme determines the signalling capability at the end points of the link and implements the correct protocol. This enables isochronous nodes and hubs to automatically detect the presence of ethernet, token ring, or other LAN equipment at the other end of the network cable. If this detection occurs, the isochronous LAN equipment will fall-back to a LAN compliant mode of operation. Typically, only the hub will have the capability of operating in different networking modes, such as ethernet, Token Ring isochronous modes. The hub will listen for some form of identification from the attached nodes as to the type of service to provide—isochronous or non-isochronous; ethernet, token ring or other LAN service.
摘要翻译：提供对混合网络环境的支持，其可以包含多个等时和/或非等时LAN协议，诸如等时以太网，以太网，等时令牌环，令牌环，其他同步LAN或其他LAN系统。对混合环境的支持包括以握手方式体现的协议检测机制。该握手方案确定链路端点的信令能力，并实现正确的协议。这使得同步节点和集线器能够自动检测网络电缆另一端的以太网，令牌环或其他LAN设备的存在。如果发生此检测，同步LAN设备将落后于LAN兼容操作模式。通常，只有集线器将具有在不同组网模式下运行的能力，例如以太网，令牌环等时模式。集线器将从连接的节点监听某种形式的标识，以提供提供同步或非同步的服务类型; 以太网，令牌环或其他LAN服务。

7. 发明授权

US5559796A Delay control for frame-based transmission of data 失效
标题翻译：基于帧的数据传输的延迟控制
公开(公告)号：US5559796A
公开(公告)日：1996-09-24
申请号：US396445
申请日：1995-02-28
申请人： Brian C. Edem , Debra J. Worsley
发明人： Brian C. Edem , Debra J. Worsley
IPC分类号： H04J3/06 , H04L12/64 , H04J3/26
CPC分类号： H04J3/0626 , H04J3/0632 , H04L12/6418 , H04L2012/6454 , H04L2012/6459
摘要： A network for transferring packet data in a frame structure, preferably mixed with isochronous data. The frame structure is a continuously repeating structure, with each frame having a number of time slots. Certain ones of the time slots are available for transmitting packet data. The packet data is re-timed, e.g., by using a FIFO to output the data nibble-wise as required by the frame structure. Information about variability in delays at the transmitting end is sent to the receiving end. The receiving end uses the information to eliminate the variability, such as by a variable delay FIFO, thus restoring/recreating the original packet and IFG timing. Preferably, the frame structure is translated to and from a packet structure to permit the present invention to be used with previously available packet circuitry such as a media access controller and a hub repeater circuit.
摘要翻译：用于以帧结构传送分组数据的网络，优选地与等时数据混合。帧结构是连续重复的结构，每个帧具有多个时隙。某些时隙可用于发送分组数据。分组数据被重新定时，例如通过使用FIFO来按照帧结构的要求以数字方式输出数据。关于发送端的延迟变化的信息被发送到接收端。接收端使用信息来消除可变性，例如通过可变延迟FIFO，从而恢复/重新创建原始分组和IFG定时。优选地，帧结构被转换成分组结构并且从分组结构转换为允许本发明与先前可用的分组电路一起使用，诸如媒体接入控制器和集线器中继器电路。

8. 发明授权

US5544324A Network for transmitting isochronous-source data using a frame structure with variable number of time slots to compensate for timing variance between reference clock and data rate 失效
标题翻译：使用具有可变数量时隙的帧结构传输等时源数据的网络，以补偿参考时钟和数据速率之间的时序差异
公开(公告)号：US5544324A
公开(公告)日：1996-08-06
申请号：US969911
申请日：1992-11-02
申请人： Brian C. Edem , Debra J. Worsley
发明人： Brian C. Edem , Debra J. Worsley
IPC分类号： H04J3/12 , H04J3/14 , H04J3/22 , H04L12/44 , H04L12/64 , G06F13/36 , H04L5/22
CPC分类号： H04L12/44 , H04L12/6418 , H04L2012/6427 , H04L2012/6437 , H04L2012/644 , H04L2012/6448 , H04L2012/6459
摘要： A data communication system, such as a local area network, is provided with a capability of transmitting isochronous data. Preferably the system conveys both isochronous data and non-isochronous data by time-multiplexing the data into a recurring frame structure on a four-bit nibble basis. Bandwidth available for a particular isochronous source/sink is selectable and sustainable with a predefined granularity. Data rates can be adjusted by using "rate adjustment" time slots which can transmit data in some frames and "no data" in other frames. A particular time frame or template is provided which accommodates isochronous data, non-isochronous data, D channel data, maintenance data and frame synchronization signals. Non-isochronous operation and bandwidth allocation is independent and transparent to the isochronous data activity. Frame timing can be coordinated with one or more reference clock signals, e.g., from a public telephone or wide area network. A buffer can convert between the source/sink or hub circuitry data rates and the data rates for transmission over the physical media which, for a given type of data, is discontinuous on a small time scale.
摘要翻译：诸如局域网的数据通信系统被提供有传输同步数据的能力。优选地，系统通过以四位半字节的方式将数据进行时分复用为循环帧结构来传送同步数据和非等时数据。可用于特定等时源/汇的带宽可以预定义的粒度来选择和持续。可以通过使用可以在某些帧中传送数据的“速率调整”时隙和其他帧中的“无数据”来调整数据速率。提供了一个特定的时间框架或模板，其中包含等时数据，非等时数据，D通道数据，维护数据和帧同步信号。非同步操作和带宽分配对于同步数据活动是独立的和透明的。帧定时可以与一个或多个参考时钟信号协调，例如来自公共电话或广域网。缓冲器可以在源/汇或集线器电路数据速率和数据速率之间进行转换，以便通过物理介质进行传输，对于给定类型的数据，它们在小时间尺度上是不连续的。

9. 发明授权

US5566169A Data communication network with transfer port, cascade port and/or frame synchronizing signal 失效
公开(公告)号：US5566169A
公开(公告)日：1996-10-15
申请号：US147359
申请日：1993-11-01
申请人： Geetha N. K. Rangan , Debra J. Worsley , Richard Thaik , Brian C. Edem
发明人： Geetha N. K. Rangan , Debra J. Worsley , Richard Thaik , Brian C. Edem
IPC分类号： F02B75/02 , H04L12/44 , H04L12/64 , H04J3/14
CPC分类号： H04L12/44 , H04L12/6418 , F02B2075/025 , H04L2012/644 , H04L2012/6454 , H04L2012/6459
摘要： A data communication system, such as a local area network, is provided with a capability of transmitting isochronous data. Preferably the system conveys both isochronous data and non-isochronous data by time-multiplexing the data into a recurring frame structure on a four-bit nibble basis. An efficient encoding scheme permits transmission of both isochronous and non-isochronous data over existing media, such as twisted pair, without degrading bandwidth previously achieved for non-isochronous data over the same media, such as using an ethernet system. Bandwidth available for a particular isochronous source/sink is selectable and sustainable with a predefined granularity. The arriving data is de-multiplexed at the hub into separate channels for handling the separate streams by appropriate hardware. Preferably, the present invention can be implemented in a fashion that is transparent to already-installed media access controllers. Preferably, some components of the system can detect the frame-transmission capability of other components and, if such capability is lacking, can fall back to a mode compliant with existing capabilities.

10. 再颁专利

USRE39395E1 Data communication network with transfer port, cascade port and/or frame synchronizing signal 有权
标题翻译：具有传输端口，级联端口和/或帧同步信号的数据通信网络
公开(公告)号：USRE39395E1
公开(公告)日：2006-11-14
申请号：US09173582
申请日：1998-10-15
申请人： Geetha N. K. Rangan , Debra J. Worsley , Richard Thaik , Brian C. Edem
发明人： Geetha N. K. Rangan , Debra J. Worsley , Richard Thaik , Brian C. Edem
IPC分类号： H04J3/14
CPC分类号： H04L12/44 , H04L12/6418 , H04L2012/644 , H04L2012/6454 , H04L2012/6459
摘要： A data communication system, such as a local area network, is provided with a capability of transmitting isochronous data. Preferably the system conveys both isochronous data and non-isochronous data by time-multiplexing the data into a recurring frame structure on a four-bit nibble basis. An efficient encoding scheme permits transmission of both isochronous and non-isochronous data over existing media, such as twisted pair, without degrading bandwidth previously achieved for non-isochronous data over the same media, such as using an ethernet system. Bandwidth available for a particular isochronous source/sink is selectable and sustainable with a predefined granularity. The arriving data is de-multiplexed at the hub into separate channels for handling the separate streams by appropriate hardware. Preferably, the present invention can be implemented in a fashion that is transparent to already-installed media access controllers. Preferably, some components of the system can detect the frame-transmission capability of other components and, if such capability is lacking, can fall back to a mode compliant with existing capabilities.
摘要翻译：诸如局域网的数据通信系统被提供有传输同步数据的能力。优选地，系统通过以四位半字节的方式将数据进行时分复用为循环帧结构来传送同步数据和非等时数据。有效的编码方案允许在诸如双绞线之类的现有介质上传输同步和非等时同步数据，而不会降低先前通过同一介质（例如使用以太网系统）对非同步数据实现的带宽。可用于特定等时源/汇的带宽可以预定义的粒度来选择和持续。到达的数据在集线器处被解复用为单独的信道，以通过适当的硬件来处理单独的流。优选地，本发明可以以对已经安装的媒体访问控制器透明的方式来实现。优选地，系统的一些组件可以检测其他组件的帧传输能力，并且如果缺乏这种能力，则可以回到符合现有能力的模式。

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