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11. 发明授权

US5687174A Network link endpoint capability detection 失效
标题翻译：网络链路端点能力检测
公开(公告)号：US5687174A
公开(公告)日：1997-11-11
申请号：US430143
申请日：1995-04-26
申请人： Brian C. Edem , Debra J. Worsley
发明人： Brian C. Edem , Debra J. Worsley
IPC分类号： H04L12/28 , H04L12/44 , H04L12/56 , H04L12/64 , H04L29/06 , H04L29/08
CPC分类号： H04L12/6418 , H04L12/44 , H04L29/06 , H04L49/351 , H04L69/323 , H04L2012/6437 , H04L2012/6451 , H04L2012/6454 , H04L2012/6459 , H04L69/18
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收听某种形式的标识，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。

12. 发明授权

US5668811A Method of maintaining frame synchronization in a communication network 失效
标题翻译：在通信网络中维护帧同步的方法
公开(公告)号：US5668811A
公开(公告)日：1997-09-16
申请号：US486110
申请日：1995-06-07
申请人： Debra J. Worsley , Brian C. Edem
发明人： Debra J. Worsley , Brian C. Edem
IPC分类号： F02B75/02 , H04L12/44 , H04L12/64 , H04J3/07 , H04L12/43
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.
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。

13. 发明授权

US5361261A Frame-based transmission of data 失效
标题翻译：基于帧的数据传输
公开(公告)号：US5361261A
公开(公告)日：1994-11-01
申请号：US970329
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： H04L12/56 , H04L12/44 , H04L12/64 , H03M7/00 , H04J3/02
CPC分类号： H04L12/6418 , H04L12/44 , H04L2012/6437 , H04L2012/6448 , H04L2012/6459
摘要： A network for transferring packet data in a frame structure, preferably mixed with isochronous data is provided. 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. Similar re-timing can be used for isochronous data so that the frame structure defines time-division multiplexing of the packet data and isochronous data. A four/five encoding scheme provides sufficient encoding efficiency that both the packet data and other data can be accommodated without degrading the data rate of the packet data. The encoding scheme provides extra symbols which can be used for transferring "no carrier" information, or "frame alignment" messages. 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. Latency of the FIFO can be reduced by pre-filling with packet preambles, and/or sub-latency propagation of preamble bytes, or providing special MACs which do not output preambles, and using the buffer circuitry to output preambles.
摘要翻译：提供了一种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。类似的重新定时可以用于等时数据，使得帧结构定义分组数据和等时数据的时分复用。四/五编码方案提供了足够的编码效率，可以容纳分组数据和其他数据，而不降低分组数据的数据速率。编码方案提供了可用于传送“无载波”信息或“帧对准”消息的额外符号。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。 FIFO的延迟可以通过预填充分组前导码和/或前导码字节的子延迟传播，或提供不输出前导码的特殊MAC，以及使用缓冲电路来输出前导码来减少。

14. 再颁专利

USRE39216E1 Asynchronous processor access to a switch table in a network with isochronous capability 有权
标题翻译：异步处理器访问具有同步能力的网络中的交换机表
公开(公告)号：USRE39216E1
公开(公告)日：2006-08-01
申请号：US09231855
申请日：1999-01-14
申请人： Debra J. Worsley , Michael T. Werstlein , Richard W Thaik
发明人： Debra J. Worsley , Michael T. Werstlein , Richard W Thaik
IPC分类号： H04L12/42
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. Switching of data is handled using switching tables. The tables can be updated by a processor. Updates can be performed asynchronously so that the processor does not have to wait until the switch tables are in an unused updatable state before outputting the update information. 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. The arriving data is de-multiplexed at the hub into separate channels for handling the separate streams by appropriate hardware.
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。使用切换表来处理数据的切换。表可以由处理器更新。可以异步地执行更新，使得处理器在输出更新信息之前不必等到交换机表处于未使用的可更新状态。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同步数据，而不会降低先前通过相同介质（例如使用以太网）系统的非同步数据实现的带宽。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。

15. 发明授权

US5594734A Asynchronous processor access to a switch table in a network with isochronous capability 失效
标题翻译：异步处理器访问具有同步能力的网络中的交换机表
公开(公告)号：US5594734A
公开(公告)日：1997-01-14
申请号：US146336
申请日：1993-11-01
申请人： Debra J. Worsley , Michael T. Werstlein , Richard W. Thaik
发明人： Debra J. Worsley , Michael T. Werstlein , Richard W. Thaik
IPC分类号： F02B75/02 , H04L12/44 , H04L12/64 , H04L12/43
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. Switching of data is handled using switching tables. The tables can be updated by a processor. Updates can be performed asynchronously so that the processor does not have to wait until the switch tables are in an unused updatable state before outputting the update information. 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. The arriving data is de-multiplexed at the hub into separate channels for handling the separate streams by appropriate hardware.
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。使用切换表来处理数据的切换。表可以由处理器更新。可以异步地执行更新，使得处理器在输出更新信息之前不必等到交换机表处于未使用的可更新状态。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同步数据，而不会降低先前通过相同介质（例如使用以太网）系统的非同步数据实现的带宽。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。

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