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1. 发明授权

US06625146B1 Method and apparatus for operating a network switch in a CPU-less environment 有权
标题翻译：在无CPU环境中操作网络交换机的方法和装置
公开(公告)号：US06625146B1
公开(公告)日：2003-09-23
申请号：US09321833
申请日：1999-05-28
申请人： Shashank Merchant , Robert A. Williams , Ching Yu
发明人： Shashank Merchant , Robert A. Williams , Ching Yu
IPC分类号： H04L1256
CPC分类号： H04L49/901 , H04L47/6215 , H04L49/205 , H04L49/3027 , H04L49/351 , H04L49/352 , H04L49/354 , H04L49/90
摘要： A method and apparatus are disclosed for operating a network switch without the use of a CPU. A control interface is used to connect the network switch to the external CPU. The control interface generates an initialization signal indicative of the absence of a CPU. Upon receiving the initialization signal, an internal rules checker initializes the network switch. The internal rules checker will then begin receiving data frames and forwarding them to the appropriate network stations based on a source address and destination address contained in the data frames.
摘要翻译：公开了一种用于在不使用CPU的情况下操作网络交换机的方法和装置。控制接口用于将网络交换机连接到外部CPU。控制接口产生指示不存在CPU的初始化信号。一旦接收到初始化信号，内部规则检查器初始化网络交换机。然后，内部规则检查器将基于数据帧中包含的源地址和目的地地址开始接收数据帧并将其转发到相应的网络站。

2. 发明授权

US06680945B1 Method and apparatus for support of tagging and untagging per VLAN per port 有权
标题翻译：支持每个端口每个VLAN的标记和取消标签的方法和设备
公开(公告)号：US06680945B1
公开(公告)日：2004-01-20
申请号：US09317145
申请日：1999-05-24
申请人： Shashank Merchant , Robert A. Williams
发明人： Shashank Merchant , Robert A. Williams
IPC分类号： H04L1256
CPC分类号： H04L45/00 , H04L12/4645 , H04L12/467 , H04L45/50
摘要： An integrated multiport switch operating in a packet switched network provides the capability via distributed egress logic to alter VLAN tags on a port by port basis. An internal rules checker (IRC) analyzes the header of a data frame to determine the frame type: untagged, VLAN-tagged, or priority-tagged. The IRC searches the untagged set table for the set of ports that are untagged for a particular VLAN. The IRC passes a forwarding descriptor that includes the frame type and a operational code (opcode) to a Port Vector FIFO logic (PVF). The PVF is responsible for creating a new opcode that instructs a dequeuing logic to add, remove, modify the VLAN tag, or send the frame unmodified. The opcodes generated by the PVF are individualized for each output port.
摘要翻译：在分组交换网络中操作的集成多端口交换机通过分布式出口逻辑提供了在端口上改变VLAN标签的能力。内部规则检查器（IRC）分析数据帧的头部以确定帧类型：未标记，VLAN标记或优先级标记。 IRC在未标记的集合表中搜索针对特定VLAN未标记的端口集合。 IRC将包含帧类型和操作码（opcode）的转发描述符传递给端口向量FIFO逻辑（PVF）。 PVF负责创建一个新的操作码，指示一个出队逻辑来添加，删除，修改VLAN标签，或者发送未修改的帧。由PVF生成的操作码针对每个输出端口进行个性化。

3. 发明授权

US06515993B1 Method and apparatus for manipulating VLAN tags 有权
标题翻译：用于处理VLAN标签的方法和设备
公开(公告)号：US06515993B1
公开(公告)日：2003-02-04
申请号：US09321582
申请日：1999-05-28
申请人： Robert A. Williams , Bahadir Erimli , Shashank Merchant
发明人： Robert A. Williams , Bahadir Erimli , Shashank Merchant
IPC分类号： H04L1256
CPC分类号： H04L12/467 , H04L12/4645 , H04L49/205 , H04L49/3027 , H04L49/351 , H04L49/352 , H04L49/354
摘要： An integrated multiport switch operating in a packet switched network provides the capability to alter VLAN tags on a port by port basis. An internal rules checker (IRC) analyzes the header of a data frame to determine the frame type: untagged, VLAN-tagged, or priority-tagged. The IRC searches the untagged set table for the set of ports that are untagged for a particular VLAN. The IRC passes a forwarding descriptor that includes the frame type and a operational code (opcode) to a Port Vector FIFO logic (PVF). The PVF is responsible for creating a new opcode that instructs a dequeuing logic to add, remove, modify the VLAN tag, or send the frame unmodified. The opcodes generated by the PVF are individualized for each output port.
摘要翻译：在分组交换网络中操作的集成多端口交换机提供了逐个端口改变VLAN标签的能力。内部规则检查器（IRC）分析数据帧的头部以确定帧类型：未标记，VLAN标记或优先级标记。 IRC在未标记的集合表中搜索针对特定VLAN未标记的端口集合。 IRC将包含帧类型和操作码（opcode）的转发描述符传递给端口向量FIFO逻辑（PVF）。 PVF负责创建一个新的操作码，指示一个出队逻辑来添加，删除，修改VLAN标签，或者发送未修改的帧。由PVF生成的操作码针对每个输出端口进行个性化。

4. 发明授权

US06442137B1 Apparatus and method in a network switch for swapping memory access slots between gigabit port and expansion port 失效
标题翻译：用于交换千兆端口和扩展端口之间的存储器访问槽的网络交换机中的装置和方法
公开(公告)号：US06442137B1
公开(公告)日：2002-08-27
申请号：US09317143
申请日：1999-05-24
申请人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
发明人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
IPC分类号： H04L522
CPC分类号： H04L49/901 , H04L49/103 , H04L49/3027 , H04L49/351 , H04L49/352 , H04L49/90 , H04L49/9031 , H04L49/9078
摘要： A network switch having switch ports for full-duplex communication of data packets with respective network nodes according to Ethernet (IEEE 802.3) protocol that allocates a prescribed number of external memory bandwidth slots between high data rate ports based on the compared amount of network traffic on the respective ports. A scheduler within an external memory interface initially assigns memory access slots to the respective high data rate ports according to a prescribed sequence. If the scheduler subsequently detects that the network data traffic on a port having less slots is higher than the traffic on a port having more slots, the slots are swapped between the high data rate ports. Additionally, a clock multiplexer in one of the high data rate ports adjusts the data rate of the port dependent upon the number of slots assigned to that port. The swapping of bandwidth slots between the high data rate ports along with the adjustment of the port clock rate enables the efficient use of limited memory bandwidth resources.
摘要翻译：网络交换机具有用于根据以太网（IEEE 802.3）协议的具有各网络节点的数据分组全双工通信的交换机端口，该协议基于网络流量的比较量在高数据速率端口之间分配规定数量的外部存储器带宽时隙各个端口。外部存储器接口中的调度器根据规定的顺序，初始地将存储器访问时隙分配给相应的高数据速率端口。如果调度器随后检测到具有较少时隙的端口上的网络数据流量高于具有更多时隙的端口上的流量，则这些时隙在高数据速率端口之间交换。此外，高数据速率端口之一中的时钟多路复用器根据分配给该端口的时隙数来调整端口的数据速率。在高数据速率端口之间交换带宽时隙以及端口时钟速率的调整使得能够有效地使用有限的存储器带宽资源。

5. 发明授权

US06904043B1 Apparatus and methods for storing and processing header information in a network switch 有权
标题翻译：在网络交换机中存储和处理标题信息的装置和方法
公开(公告)号：US06904043B1
公开(公告)日：2005-06-07
申请号：US09316072
申请日：1999-05-21
申请人： Shashank Merchant , Ching Yu
发明人： Shashank Merchant , Ching Yu
IPC分类号： H04L12/56 , H04L29/06 , H04L12/28
CPC分类号： H04L49/25 , H04L49/205 , H04L49/254 , H04L49/3027 , H04L49/351 , H04L49/352 , H04L49/354 , H04L49/90 , H04L49/901 , H04L49/9047 , H04L49/9073 , H04L49/9089 , H04L69/22
摘要： A network switch configured for switching data packets across multiple ports uses an internal memory to store frame headers for processing by decision making logic. The internal memory stores frame headers in a queue configured to store a number of the frame headers for each of the receive ports. A scheduler is included for facilitating the transfer the data from the queues to the decision making logic according to a predetermined priority. The scheduler is also able allocate the time slots in accordance with data traffic at the corresponding receive ports to maximize data throughput.
摘要翻译：配置用于跨多个端口切换数据包的网络交换机使用内部存储器来存储用于由决策逻辑进行处理的帧头。内部存储器存储队列中的帧头，被配置为存储每个接收端口的多个帧头。包括调度器，以便于根据预定优先级将数据从队列传送到决策逻辑。调度器还可以根据相应接收端口处的数据流量来分配时隙以最大化数据吞吐量。

6. 发明授权

US06732184B1 Address table overflow management in a network switch 有权
标题翻译：网络交换机中的地址表溢出管理
公开(公告)号：US06732184B1
公开(公告)日：2004-05-04
申请号：US09604266
申请日：2000-06-26
申请人： Shashank Merchant , Ching Yu
发明人： Shashank Merchant , Ching Yu
IPC分类号： G06F1300
CPC分类号： H04L45/00 , H04L45/742
摘要： A switching system includes a multiport module having an address table for storing network addresses, and a host processor configured for selectively swapping the stored network addresses in the address table to an internal memory that serves as an overflow address table for the multiport switch module. The address table internal to the multiport module is configured for storing a prescribed number of network addresses for high-speed access, for example the most frequently-used network addresses. The host processor, configured for controlling the storage of network addresses between the address table and the external memory, uses the external memory as the overflow address table for storage of less frequently-used network addresses, for example addresses of network devices that transmit little more than periodic “keep-alive” frames. Hence, a large number of addresses may be managed by the switching system, without the necessity of an unusually large on-chip address table.
摘要翻译：交换系统包括具有用于存储网络地址的地址表的多端口模块，以及被配置为将地址表中存储的网络地址有选择地交换到用作多端口交换模块的溢出地址表的内部存储器的主处理器。多端口模块内部的地址表被配置为存储用于高速访问的规定数量的网络地址，例如最常用的网络地址。配置为控制地址表和外部存储器之间的网络地址存储的主处理器使用外部存储器作为用于存储较不频繁使用的网络地址的溢出地址表，例如，传输更多的网络设备的地址比定期的“保持活动”框架。因此，可以由交换系统管理大量地址，而不需要非常大的片上地址表。

7. 发明授权

US06535489B1 Method and apparatus in a network switch for handling link failure and link recovery in a trunked data path 有权
标题翻译：用于处理中继数据路径中的链路故障和链路恢复的网络交换机中的方法和装置
公开(公告)号：US06535489B1
公开(公告)日：2003-03-18
申请号：US09315854
申请日：1999-05-21
申请人： Shashank Merchant , Robert Williams , John M. Chiang , Ching Yu
发明人： Shashank Merchant , Robert Williams , John M. Chiang , Ching Yu
IPC分类号： G06F1110
CPC分类号： H04L45/245 , H04L41/0654 , H04L43/0817 , H04L45/28 , Y02D50/30
摘要： A network switch configured for switching data packets across multiple ports and for supporting trunked data paths uses an address table to generate frame forwarding information. When a link in a trunked data path experiences a change in its operating status, the trunk data path is reconfigured to reflect the current operating conditions, without reprogramming the address table or powering down the switch.
摘要翻译：配置为跨多个端口切换数据包并支持集群数据路径的网络交换机使用地址表来生成帧转发信息。当中继数据路径中的链路经历其操作状态的改变时，重新配置中继线数据路径以反映当前的工作状态，而不重新编程地址表或关闭交换机。

8. 发明授权

US06501734B1 Apparatus and method in a network switch for dynamically assigning memory interface slots between gigabit port and expansion port 有权
标题翻译：网络交换机中的装置和方法，用于在千兆端口和扩展端口之间动态分配存储器接口槽
公开(公告)号：US06501734B1
公开(公告)日：2002-12-31
申请号：US09317150
申请日：1999-05-24
申请人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
发明人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
IPC分类号： H04J116
CPC分类号： H04L49/103 , H04L49/254 , H04L49/3027 , H04L49/351 , H04L49/352 , H04L49/354 , H04L49/90 , H04L49/901
摘要： A network switch having switch ports for full-duplex communication of data packets with respective network nodes according to Ethernet (IEEE 802.3) protocol dynamically allocates external memory bandwidth slots between high data rate ports. An external memory interface determines if a high data rate port makes a request for a bandwidth slot and grants the request if made. The slot is taken from a selected group which is a subset of the total number of slots. If a request for the slot is not made, the external memory interface assigns the slot to another high data rate port. Lower data rate ports in the network switch are assigned fixed slots from those slots not from within the selected group of slots. The dynamic allocation of bandwidth slots between the high data rate port enables the efficient use of limited memory bandwidth resources.
摘要翻译：具有根据以太网（IEEE 802.3）协议的具有各个网络节点的数据分组全双工通信的交换机端口的网络交换机动态地在高数据速率端口之间分配外部存储器带宽时隙。外部存储器接口确定高数据速率端口是否对带宽槽进行请求，如果发出请求则确定该请求。时隙是从所选择的组中获取的，该组是总时隙数的子集。如果没有对插槽进行请求，则外部存储器接口将插槽分配给另一个高数据速率端口。网络交换机中的较低数据速率端口从这些时隙中分配固定时隙，而不是在所选择的时隙组内。高数据速率端口之间的带宽时隙的动态分配使得能够有效地利用有限的存储器带宽资源。

9. 发明授权

US07031305B1 Apparatus and method for programmable memory access slot assignment 有权
标题翻译：可编程存储器存取槽分配的装置和方法
公开(公告)号：US07031305B1
公开(公告)日：2006-04-18
申请号：US09317156
申请日：1999-05-24
申请人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
发明人： Ching Yu , Xiaohua Zhuang , Bahadir Erimli , John M. Chiang , Shashank Merchant , Robert Williams , Edward Yang , Chandan Egbert , Vallath Nandakumar , Ian Lam , Eric Tsin-Ho Leung
IPC分类号： H04L12/28
CPC分类号： H04L49/351 , H04L49/205 , H04L49/3027 , H04L49/354
摘要： A network switch having switch ports for full-duplex communication of data packets with respective network nodes according to Ethernet (IEEE 802.3) protocol that flexibly assigns memory access slots to access an external memory according to programmable information. A scheduler within an external memory interface assigns the memory access slots to the respective network switch ports according to a programmed sequence written into an assignment table memory from an external programmable data storage device.
摘要翻译：根据以太网（IEEE 802.3）协议，具有根据可编程信息灵活地分配存储器访问时隙以访问外部存储器的数据分组与各网络节点全双工通信的交换机端口的网络交换机。外部存储器接口中的调度器根据从外部可编程数据存储设备写入指配表存储器的编程序列，将存储器访问时隙分配给相应的网络交换机端口。

10. 发明申请

US20130246457A1 Method for Efficient Database Formation and Search on Media Devices Acting Synchronously with Television Programming 有权
标题翻译：有效的数据库形成和搜索与电视节目同步的媒体设备的方法
公开(公告)号：US20130246457A1
公开(公告)日：2013-09-19
申请号：US13826502
申请日：2013-03-14
申请人： Mihailo M. Stojancic , Sunil Suresh Kulkarni , Shashank Merchant , Jose Pio Pereira , Oleksiy Bolgarov
发明人： Mihailo M. Stojancic , Sunil Suresh Kulkarni , Shashank Merchant , Jose Pio Pereira , Oleksiy Bolgarov
IPC分类号： G06F17/30
CPC分类号： G06F17/30023 , G06F17/30026 , G06F17/30047
摘要： Techniques for efficient database formation and search in applications embedded in a media device are provided. The search may be performed synchronously with presentation of media programming content on a nearby media presentation device. A mobile media device captures some temporal fragments of the presented audio/video content on its microphone and camera, and then generates query fingerprints for the captured fragment. A local reference database resides on the mobile media device and a master reference database resides on a remote server with a most recent chunk of reference fingerprints transferred dynamically to the local mobile media device. A chunk of the query fingerprints generated locally on the mobile media device are searched on the local reference database for continuous content search and identification. The method presented automatically switches between the local search on the mobile media device and a remote search on an external search server.
摘要翻译：提供了用于在嵌入在媒体设备中的应用中有效的数据库形成和搜索的技术。搜索可以与附近的媒体呈现设备上的媒体节目内容的呈现同步地执行。移动媒体设备捕获其麦克风和相机上呈现的音频/视频内容的一些时间片段，然后为捕获的片段生成查询指纹。本地参考数据库驻留在移动媒体设备上，主参考数据库驻留在远程服务器上，最近一批参考指纹被动态传输到本地移动媒体设备。在本地参考数据库上搜索在移动媒体设备上本地生成的查询指纹的块，用于连续内容搜索和识别。所呈现的方法自动地在移动媒体设备上的本地搜索和外部搜索服务器上的远程搜索之间进行切换。

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