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1. 发明授权

US06636523B1 Flow control using rules queue monitoring in a network switching system 有权
标题翻译：流量控制在网络交换系统中使用规则队列监控
公开(公告)号：US06636523B1
公开(公告)日：2003-10-21
申请号：US09237861
申请日：1999-01-27
申请人： Michael Vengchong Lau , Shashank C. Merchant
发明人： Michael Vengchong Lau , Shashank C. Merchant
IPC分类号： H04L1256
CPC分类号： H04L47/30 , H04L49/205 , H04L49/3027 , H04L49/351 , H04L49/352 , H04L49/90
摘要： A novel method of flow control in a multiport data switching system having a decision making engine for controlling data forwarding between receive ports and at least one transmit port. Data blocks representing received data packets are placed in a plurality of data queues to be processed by the decision making engine. The data queues allocated to the receive ports are monitored to produce a flow control threshold signal for a selected data queue to indicate a heavy traffic condition of a receive port corresponding to the selected data queue. For example, the flow control threshold signal may indicate that the receive port is close to an overflow condition. Monitoring of a selected data queue may be performed by comparing a write pointer indicating a memory location for writing the data blocks into the selected data queue with a read pointer indicating a memory location for reading the data blocks from the selected data queue. The flow control threshold signal is produced when a predetermined number of memory entries in the data queue is occupied.
摘要翻译：一种具有用于控制接收端口和至少一个发送端口之间的数据转发的决策引擎的多端口数据交换系统中的流控制的新颖方法。表示接收到的数据分组的数据块被放置在多个数据队列中，由决策引擎处理。监视分配给接收端口的数据队列，以产生用于选定数据队列的流量控制阈值信号，以指示对应于所选择的数据队列的接收端口的繁重的业务状况。例如，流量控制阈值信号可以指示接收端口接近溢出状态。可以通过将指示用于将数据块写入所选择的数据队列的存储器位置的写指针与指示用于从所选择的数据队列读取数据块的存储器位置的读指针进行比较来执行对所选数据队列的监视。当数据队列中的预定数量的存储器条目被占用时，产生流量控制阈值信号。

2. 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。

3. 发明授权

US06463032B1 Network switching system having overflow bypass in internal rules checker 有权
标题翻译：网络交换系统在内部规则检查器中具有溢出旁路
公开(公告)号：US06463032B1
公开(公告)日：2002-10-08
申请号：US09238047
申请日：1999-01-27
申请人： Michael Vengchong Lau , Shashank C. Merchant , John M. Chiang
发明人： Michael Vengchong Lau , Shashank C. Merchant , John M. Chiang
IPC分类号： H04L1254
CPC分类号： H04L49/9078 , H04L49/205 , H04L49/3027 , H04L49/351 , H04L49/90 , H04L49/901
摘要： A novel method of overflow data handling in a multiport data switching system having a decision making engine for controlling data forwarding between receive ports and at least one transmit port. Data blocks representing received data packets are placed in data queues corresponding to the receive ports. The data queues are transferred to logic circuitry for processing in accordance with a prescribed algorithm. Then, a forwarding decision is made to determine the transmit port. An overflow bypass is provided to allow at least a portion of a data block to bypass the logic circuitry, when at least one of the data queues is in an overflow state. For example, pointers indicating memory locations for storing the corresponding received data packets may be transferred via the overflow bypass when the overflow state is detected.
摘要翻译：一种具有用于控制接收端口与至少一个发送端口之间的数据转发的决策引擎的多端口数据交换系统中的溢出数据处理的新颖方法。表示接收到的数据分组的数据块被放置在对应于接收端口的数据队列中。数据队列被传送到逻辑电路，以根据规定的算法进行处理。然后，进行转发决定以确定发送端口。当至少一个数据队列处于溢出状态时，提供溢出旁路以允许数据块的至少一部分绕过逻辑电路。例如，当检测到溢出状态时，指示用于存储对应的接收数据分组的存储器位置的指针可以经由溢出旁路传送。

4. 发明授权

US06895015B1 Dynamic time slot allocation in internal rules checker scheduler 有权
标题翻译：内部规则检查器调度器中的动态时隙分配
公开(公告)号：US06895015B1
公开(公告)日：2005-05-17
申请号：US09304964
申请日：1999-05-05
申请人： John Chiang , Shashank Merchant , Michael VengChong Lau
发明人： John Chiang , Shashank Merchant , Michael VengChong Lau
IPC分类号： H04L12/54 , H04L12/56
CPC分类号： H04L49/901 , H04L47/50 , H04L47/522 , H04L49/254 , H04L49/352 , H04L49/90
摘要： The invention provides a novel method of data processing in a multiport communication system having a decision making engine for controlling data forwarding between the receive ports and at least one transmit port. Data blocks representing received data packets are placed in data queues corresponding to the receive ports. The data queues are transferred one at a time in successive time slots to logic circuitry that determines the transmit ports. The time slots are dynamically allocated to the data queues in accordance with data traffic at the corresponding receive ports.
摘要翻译：本发明提供了一种具有用于控制接收端口与至少一个发送端口之间的数据转发的决策引擎的多端口通信系统中的新型数据处理方法。表示接收到的数据分组的数据块被放置在对应于接收端口的数据队列中。数据队列在连续的时隙中一次一个地传送到确定发送端口的逻辑电路。根据相应接收端口处的数据流量，将时隙动态地分配给数据队列。

5. 发明授权

US06463478B1 Method and apparatus for identifying runt data frames received by a network switch 有权
标题翻译：用于识别由网络交换机接收的寻线数据帧的方法和装置
公开(公告)号：US06463478B1
公开(公告)日：2002-10-08
申请号：US09316179
申请日：1999-05-21
申请人： Michael Vengchong Lau , Charlie Sang
发明人： Michael Vengchong Lau , Charlie Sang
IPC分类号： G06F1128
CPC分类号： H04L29/06 , H04L43/00 , H04L43/16 , H04L47/30 , H04L49/205 , H04L49/3027 , H04L49/351 , H04L49/90 , H04L49/901 , H04L69/324
摘要： An apparatus and method for detecting runt data frames received by a network switch includes a plurality of queuing logics, corresponding to the number of ports contained in the network switch. The queuing logics transfer received data frames to a memory area of the network switch. The queuing logics also update the value of a column write pointer that indicates the number of data transfers required to store a prescribed portion of a particular received data frame in the memory area. A rules queue examines the column write pointer and determines if the particular data frame is a runt data frame. A runt indication signal is generated, after the particular data frame has been completely transferred to the memory area, in order to indicate if the particular data frame was a runt data frame.
摘要翻译：一种用于检测由网络交换机接收的无线数据帧的装置和方法，包括与网络交换机中包含的端口数相对应的多个排队逻辑。排队逻辑传输将数据帧接收到网络交换机的存储区域。排队逻辑还更新列写入指针的值，其指示将特定接收数据帧的规定部分存储在存储器区域中所需的数据传送的数量。规则队列检查列写入指针，并确定特定数据帧是否是欠锁数据帧。在特定数据帧已经被完全传送到存储器区域之后，产生欠压指示信号，以便指示特定数据帧是否是欠幅数据帧。

6. 发明授权

US06335938B1 Multiport communication switch having gigaport and expansion ports sharing the same time slot in internal rules checker 有权
标题翻译：具有端口和扩展端口的多端口通信交换机在内部规则检查器中共享相同的时隙
公开(公告)号：US06335938B1
公开(公告)日：2002-01-01
申请号：US09304959
申请日：1999-05-05
申请人： John M. Chiang , Michael VengChong Lau , Shashank Merchant
发明人： John M. Chiang , Michael VengChong Lau , Shashank Merchant
IPC分类号： H04J316
CPC分类号： H04L49/45 , H04L49/1553 , H04L49/201 , H04L49/30 , H04L49/3009 , H04L49/352 , H04L49/354
摘要： A novel method of data processing in a multiport data switching system having a decision making engine for controlling data forwarding between receive ports and at least one transmit port. The receive ports include an expansion port for receiving data packets from another switching system, and a high-speed port for receiving data packets at a rate higher than data rates at regular receive ports. In accordance with the method of the present invention, data blocks representing received data packets are placed in a plurality of data queues corresponding to the plurality of the receive ports. The data queues are transferred in successive time slots to logic circuitry for determining at least one transmit port. The time slots assigned to each of the plurality of receive ports includes expansion port time slots assigned to the expansion port and high-speed time slots assigned to the high-speed port. The expansion and high-speed time slots are dynamically distributed between the expansion and high-speed ports in accordance with relative data traffic at the ports. In particular, non-requested high-speed port time slots may be allocated to the expansion port, if the number of requests for high-speed port time slots is less than the number of the high-speed time slots. Similarly, non-requested expansion port time slots may be allocated to the high-speed port, if the number of requests for expansion port time slots is less than the number of the expansion port time slots.
摘要翻译：一种具有用于控制接收端口与至少一个发送端口之间的数据转发的决策引擎的多端口数据交换系统中的数据处理的新颖方法。接收端口包括用于从另一交换系统接收数据分组的扩展端口和用于以高于常规接收端口的数据速率的速率接收数据分组的高速端口。根据本发明的方法，将表示接收到的数据分组的数据块放置在对应于多个接收端口的多个数据队列中。数据队列在连续的时隙中传送到用于确定至少一个发送端口的逻辑电路。分配给多个接收端口中的每一个的时隙包括分配给扩展端口的扩展端口时隙和分配给高速端口的高速时隙。根据端口上的相对数据流量，扩展和高速时隙在扩展端口和高速端口之间动态分配。特别地，如果高速端口时隙的请求数小于高速时隙的数量，则可以向扩展端口分配非请求的高速端口时隙。类似地，如果扩展端口时隙的请求数少于扩展端口时隙的数量，则可以将未请求的扩展端口时隙分配给高速端口。

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