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1. 发明授权

US06563818B1 Weighted round robin cell architecture 有权
标题翻译：加权循环小区架构
公开(公告)号：US06563818B1
公开(公告)日：2003-05-13
申请号：US09314976
申请日：1999-05-20
申请人： Jinqlih Sang , Edward Yang
发明人： Jinqlih Sang , Edward Yang
IPC分类号： H04L1250
CPC分类号： H04L12/5601 , H04L47/245 , H04L47/2458 , H04L47/34 , H04L47/50 , H04L47/6225 , H04L47/623 , H04L49/901 , H04L2012/565 , H04L2012/5651 , H04L2012/5679 , H04L2012/5681
摘要： A network switch configured for switching data frames across multiple ports utilizes an efficient arbiter to store the data frames. Each port possesses queuing logic for requesting a free pointer from a free buffer queue. A multi-level arbitration logic arbitrates all the requests of equal priority from the network switch ports in a round robin scheme. The arbitration logic comprises a plurality of cells that cascaded to output an acknowledgement signal in response to an inhibit signal and a request signal as well as a counter that is incremented upon an asserted acknowledgement signal.
摘要翻译：配置用于跨多个端口切换数据帧的网络交换机利用有效的仲裁器来存储数据帧。每个端口具有排队逻辑，用于从空闲缓冲队列请求一个空闲指针。多级仲裁逻辑在循环方案中从网络交换机端口仲裁所有等同优先级的请求。仲裁逻辑包括响应于禁止信号和请求信号而级联以输出确认信号的多个小区以及在断言的确认信号上递增的计数器。

2. 发明授权

US06401147B1 Split-queue architecture with a first queue area and a second queue area and queue overflow area having a trickle mode and an overflow mode based on prescribed threshold values 有权
标题翻译：具有第一队列区域和第二队列区域的分组队列架构以及基于规定阈值的具有涓流模式和溢出模式的队列溢出区域
公开(公告)号：US06401147B1
公开(公告)日：2002-06-04
申请号：US09317147
申请日：1999-05-24
申请人： Jinqlih Sang , Edward Yang , Bahadir Erimli
发明人： Jinqlih Sang , Edward Yang , Bahadir Erimli
IPC分类号： G06F300
CPC分类号： H04L47/6215 , H04L47/24 , H04L47/29 , H04L49/30 , H04L49/3027 , H04L49/351 , H04L49/90 , H04L49/9078
摘要： A programmable split-queue structure includes a first queue area for receiving entries, a second queue area for outputting entries input to said first queue area, and a queue overflow engine logically coupled to the first queue area and the second queue area. The queue overflow engine functions to transfer entries from the first queue area to the second queue area using one of two transfer modes. The queue overflow engine selects the most appropriate transfer mode based on a prescribed threshold value that can be dynamically programmed. An overflow storage area having high capacity may be provided in an external memory in order to increase the overall capacity of the queue structure.
摘要翻译：可编程分组队列结构包括用于接收条目的第一队列区域，用于输出输入到所述第一队列区域的条目的第二队列区域以及逻辑耦合到所述第一队列区域和所述第二队列区域的队列溢出引擎。队列溢出引擎用于使用两种传输模式之一将条目从第一队列区域传送到第二队列区域。队列溢出引擎基于可以动态编程的规定阈值来选择最合适的传输模式。可以在外部存储器中提供具有高容量的溢出存储区域，以便增加队列结构的总体容量。

3. 发明授权

US6167054A Method and apparatus providing programmable thresholds for full-duplex flow control in a network switch 失效
标题翻译：为网络交换机中的全双工流量控制提供可编程阈值的方法和装置
公开(公告)号：US6167054A
公开(公告)日：2000-12-26
申请号：US992913
申请日：1997-12-18
申请人： Philip Simmons , Bahadir Erimli , Jinqlih Sang , Peter Ka-Fai Chow , Ian Crayford , Jayant Kadambi , Denise Kerstein , Thomas Jefferson Runaldue
发明人： Philip Simmons , Bahadir Erimli , Jinqlih Sang , Peter Ka-Fai Chow , Ian Crayford , Jayant Kadambi , Denise Kerstein , Thomas Jefferson Runaldue
IPC分类号： H04L13/08 , G06F11/26 , G06F12/00 , G06F13/00 , G06F13/10 , G06F13/16 , G06F13/24 , G06F15/00 , G06F15/16 , G08B5/00 , G11C11/412 , H04B7/14 , H04J3/02 , H04J3/12 , H04J3/22 , H04J3/24 , H04L12/18 , H04L12/24 , H04L12/28 , H04L12/413 , H04L12/44 , H04L12/46 , H04L12/50 , H04L12/54 , H04L12/66 , H04L12/861 , H04L12/863 , H04L12/879 , H04L12/931 , H04L12/933 , H04L12/935 , H04L12/937 , H04L12/939 , H04L12/947 , H04Q3/545 , H04Q11/00
CPC分类号： H04L49/3009 , G06F13/1605 , G06F13/24 , G11C11/412 , H04L12/1863 , H04L12/4641 , H04L12/4645 , H04L12/467 , H04L41/0213 , H04L47/50 , H04L47/6225 , H04L49/103 , H04L49/201 , H04L49/25 , H04L49/255 , H04L49/30 , H04L49/3027 , H04L49/3054 , H04L49/351 , H04L49/354 , H04L49/40 , H04L49/50 , H04L49/552 , H04L49/555 , H04L49/90 , H04L49/901 , H04L49/9047 , H04L49/9063 , H04L49/9073 , H04L49/9078 , H04L49/9084 , H04Q3/54591 , H04Q2213/1316 , H04Q2213/13162
摘要： A network having a shared memory architecture for storing data frames has a set of programmable thresholds that specify when flow control should be initiated on full-duplex network ports. The network switch includes a queue for storing free frame pointers that specify available memory locations in an external memory for storing data frames received from a network station. The network switch takes a frame pointer from a free buffer queue for each received data frame, and stores the received data frame in the location in external memory specified by the frame pointer while a decision making engine within the switch determines the appropriate destination ports. Flow control is initiated based on the number of available frame pointers by transmitting a PAUSE frame having a selected PAUSE interval to a transmitting network station. Specifically, a full-duplex port will output a PAUSE frame having a short, medium, or long programmed pause interval if the free buffer pool of available frame pointers falls below a high, medium, or low programmable threshold, respectively. The switch thus provides flexibility in generating variable-length PAUSE control frames to minimize wasting network bandwidth.
摘要翻译：具有用于存储数据帧的共享存储器架构的网络具有一组可编程阈值，其指定何时应当在全双工网络端口上启动流量控制。网络交换机包括用于存储空闲帧指针的队列，其指定用于存储从网络站接收的数据帧的外部存储器中的可用存储器位置。网络交换机从每个接收到的数据帧的空闲缓冲器队列中获取帧指针，并且将接收到的数据帧存储在由帧指针指定的外部存储器中的位置，同时交换机内的决策引擎确定适当的目的地端口。通过将具有所选暂停间隔的暂停帧发送到发射网络站，基于可用帧指针的数量启动流控制。具体来说，如果可用帧指针的空闲缓冲池分别低于高，中或低可编程阈值，则全双工端口将输出具有短，中或长编程暂停间隔的暂停帧。因此，交换机可以灵活地生成可变长度的PAUSE控制帧，以最大限度地减少浪费的网络带宽。

4. 发明授权

US06192028B1 Method and apparatus providing programmable thresholds for half-duplex flow control in a network switch 失效
标题翻译：为网络交换机中的半双工流量控制提供可编程阈值的方法和装置
公开(公告)号：US06192028B1
公开(公告)日：2001-02-20
申请号：US08992848
申请日：1997-12-18
申请人： Philip Simmons , Bahadir Erimli , Jinqlih Sang , Eric Tsin-Ho Leung , Ian Crayford , Jayant Kadambi , Denise Kerstein , Thomas Jefferson Runaldue
发明人： Philip Simmons , Bahadir Erimli , Jinqlih Sang , Eric Tsin-Ho Leung , Ian Crayford , Jayant Kadambi , Denise Kerstein , Thomas Jefferson Runaldue
IPC分类号： H04L1256
CPC分类号： H04L49/3009 , G06F13/1605 , G06F13/24 , G11C11/412 , H04L12/1863 , H04L12/4641 , H04L12/4645 , H04L12/467 , H04L41/0213 , H04L47/50 , H04L47/6225 , H04L49/103 , H04L49/201 , H04L49/25 , H04L49/255 , H04L49/30 , H04L49/3027 , H04L49/3054 , H04L49/351 , H04L49/354 , H04L49/40 , H04L49/50 , H04L49/552 , H04L49/555 , H04L49/90 , H04L49/901 , H04L49/9047 , H04L49/9063 , H04L49/9073 , H04L49/9078 , H04L49/9084 , H04Q3/54591 , H04Q2213/1316 , H04Q2213/13162
摘要： A network switch having a shared memory architecture for storing data frames has a set of programmable thresholds that specify when flow control should be initiated on a selected network port. The network switch includes a queue for storing free frame pointers, each specifying available memory locations in an external memory for storing data frames received from a network station. The network switch takes a frame pointer from a free buffer queue for each received data frame, and stores the received data frame in the location in external memory specified by the frame pointer while a decision making engine within the switch determines the appropriate destination ports. Flow control is initiated on a half-duplex network port by transmitting a phantom packet to a transmitting network station if the output buffer of a destination port exceeds a programmed high threshold, or if the output buffer of the destination port exceeds a low programmed threshold and the queue of free frame pointers falls below a low programmable threshold. The switch thus provides flexibility in providing selective collisions with transmitting stations to minimize the possibility of network congestion without wasting network bandwidth with unnecessary collisions.
摘要翻译：具有用于存储数据帧的共享存储器架构的网络交换机具有一组可编程阈值，其指定何时应当在所选择的网络端口上启动流量控制。网络交换机包括用于存储空闲帧指针的队列，每个指定用于存储从网络站接收的数据帧的外部存储器中的可用存储器位置。网络交换机从每个接收到的数据帧的空闲缓冲器队列中获取帧指针，并且将接收到的数据帧存储在由帧指针指定的外部存储器中的位置，同时交换机内的决策引擎确定适当的目的地端口。如果目的地端口的输出缓冲区超过编程的高阈值，或者目的端口的输出缓冲区超过低编程阈值，则通过将虚拟分组发送到发射网络站，在半双工网络端口上启动流量控制，空闲帧指针的队列低于低可编程阈值。因此，交换机提供灵活性，以提供与发射站的选择性冲突，以最小化网络拥塞的可能性，而不浪费网络带宽与不必要的冲突。

5. 发明授权

US06577636B1 Decision making engine receiving and storing a portion of a data frame in order to perform a frame forwarding decision 有权
标题翻译：决策引擎接收和存储数据帧的一部分以执行帧转发决定
公开(公告)号：US06577636B1
公开(公告)日：2003-06-10
申请号：US09315725
申请日：1999-05-21
申请人： Jinqlih Sang , Michael Vengchong Lau
发明人： Jinqlih Sang , Michael Vengchong Lau
IPC分类号： H04L1256
CPC分类号： H04L49/351 , H04L49/103 , H04L49/45 , H04L49/90
摘要： A network switch configured for switching data packets across multiple ports uses an external memory to store data frames. When a data frame is transmitted to the external memory, a frame header portion of the data frame is stored on the switch for processing by decision making logic. The switch memory is configured to store a number of the frame headers corresponding to each port on the switch along with frame pointer information indicating the location in the external memory where the data frame is stored.
摘要翻译：配置为跨多个端口切换数据包的网络交换机使用外部存储器来存储数据帧。当将数据帧发送到外部存储器时，数据帧的帧头部分被存储在交换机上，由决策逻辑进行处理。开关存储器被配置为存储与交换机上的每个端口对应的多个帧头部以及指示存储数据帧的外部存储器中的位置的帧指针信息。

6. 发明授权

US06760338B1 Apparatus and method for monitoring data frames by a shared switching logic during simultaneous accessing of multiple network switch buffers 有权
标题翻译：用于在同时访问多个网络交换缓冲器期间通过共享交换逻辑来监视数据帧的装置和方法
公开(公告)号：US06760338B1
公开(公告)日：2004-07-06
申请号：US09562004
申请日：2000-05-02
申请人： Shashank Merchant , Jinqlih Sang
发明人： Shashank Merchant , Jinqlih Sang
IPC分类号： H04L1254
CPC分类号： H04L49/102 , H04L49/351 , H04L49/90
摘要： Multiple network switch modules have memory interfaces configured for transferring packet data to respective buffer memories. The memory interfaces are also configured for transfer among each other data units of data frames received from different network switch modules. A shared switching logic monitors (“snoops”) the data units as they are transferred between network switch modules, providing a centralized switching decision logic for multiple network switch modules. The memory interfaces transfer the data units according to a prescribed sequence, optimizing memory bandwidth by concurrently executing a prescribed number of successive memory writes or memory reads. A preferred embodiment includes a distributed memory interface in between the network switch modules and a shared memory system.
摘要翻译：多个网络交换机模块具有配置用于将分组数据传送到各个缓冲存储器的存储器接口。存储器接口还被配置为在从不同网络交换机模块接收的数据帧的彼此数据单元之间传送。共享交换逻辑在数据单元在网络交换机模块之间传输时监视（“窥探”）数据单元，为多个网络交换机模块提供集中式交换决策逻辑。存储器接口根据规定的顺序传送数据单元，通过同时执行规定数量的连续存储器写入或存储器读取来优化存储器带宽。优选实施例包括在网络交换机模块和共享存储器系统之间的分布式存储器接口。

7. 发明授权

US06724769B1 Apparatus and method for simultaneously accessing multiple network switch buffers for storage of data units of data frames 有权
标题翻译：用于同时访问多个网络交换缓冲器以存储数据帧的数据单元的装置和方法
公开(公告)号：US06724769B1
公开(公告)日：2004-04-20
申请号：US09401187
申请日：1999-09-23
申请人： Jinqlih Sang
发明人： Jinqlih Sang
IPC分类号： H04L1256
CPC分类号： H04L49/352 , H04L47/50 , H04L49/15 , H04L49/30 , H04L49/45
摘要： Multiple network switch modules have memory interfaces configured for transferring packet data to respective buffer memories. The memory interfaces are also configured for transfer among each other data units of data frames received from different network switch modules. The memory interfaces transfer the data units according to a prescribed sequence, optimizing memory bandwidth by concurrently executing a prescribed number of successive memory writes or memory reads. An alternative embodiment includes a distributed memory interface in between the network switch modules and a shared memory system, where the width of the data bus of the shared width memory system equals the total number of bits on the data buses of the switch modules.
摘要翻译：多个网络交换机模块具有配置用于将分组数据传送到各个缓冲存储器的存储器接口。存储器接口还被配置为在从不同网络交换机模块接收的数据帧的彼此数据单元之间传送。存储器接口根据规定的顺序传送数据单元，通过同时执行规定数量的连续存储器写入或存储器读取来优化存储器带宽。另一实施例包括在网络交换机模块和共享存储器系统之间的分布式存储器接口，其中共享宽度存储器系统的数据总线的宽度等于交换机模块的数据总线上的总位数。

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