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1. 发明授权

US06229817B1 System and method for programming late collision slot time 失效
标题翻译：用于编程后期碰撞槽时间的系统和方法
公开(公告)号：US06229817B1
公开(公告)日：2001-05-08
申请号：US08993127
申请日：1997-12-18
申请人： Jenny Liu Fischer , Ching Yu , Jeffrey Dwork
发明人： Jenny Liu Fischer , Ching Yu , Jeffrey Dwork
IPC分类号： G06F1516
CPC分类号： H04L12/40032 , H04L12/413
摘要： A system for adjusting late collision slot time is provided in a network interface having a media access control (MAC) engine that performs collision detection. The MAC engine comprises a MAC transmit block that transmits frames via a media independent interface (MII) to an ektemal physical layer device (PHY) coupled to the MII, and a MAC receive block for receiving frames from the PHY. A MAC control register is configured for storing ablate collision time slot adjustment value used to adjust the late collision slot time. The late collision time slot adjustment value is programmed to compensate for variations in internal delays of PHYs that may be connected to the MII.
摘要翻译：在具有执行冲突检测的媒体访问控制（MAC）引擎的网络接口中提供了一种用于调整后期冲突时隙时间的系统。 MAC引擎包括通过媒体独立接口（MII）向耦合到MII的物理层设备（PHY）发送帧的MAC传输块，以及用于从PHY接收帧的MAC接收块。配置MAC控制寄存器，用于存储用于调整后期冲突时隙时间的切换冲突时隙调整值。后期冲突时隙调整值被编程以补偿可能连接到MII的PHY的内部延迟的变化。

2. 发明授权

US06731601B1 Apparatus and method for resetting a retry counter in a network switch port in response to exerting backpressure 有权
标题翻译：响应于施加背压而重置网络交换机端口中的重试计数器的装置和方法
公开(公告)号：US06731601B1
公开(公告)日：2004-05-04
申请号：US09477723
申请日：2000-01-05
申请人： Gopal Krishna , Ching Yu , Peter Chow , Jenny Liu Fischer , Bahadir Erimli
发明人： Gopal Krishna , Ching Yu , Peter Chow , Jenny Liu Fischer , Bahadir Erimli
IPC分类号： G01R3108
CPC分类号： H04L47/26 , H04L12/413 , H04L49/205 , H04L49/3027 , H04L49/351 , H04L49/50 , H04L49/506
摘要： A network switch having switch ports for communication of data packets with respective computer network nodes according to CSMA/CD protocol that resets a retry counter within any one of the respective switch ports if backpressure is asserted by that port. The resetting of the retry counter within a port after assertion of backpressure affords the port a greater probability of winning collision mediation under the CSMA/CD protocol, thus more quickly relieving congestion which may occur in the network switch.
摘要翻译：网络交换机具有用于根据CSMA / CD协议与数据分组与各个计算机网络节点进行通信的交换机端口，如果该端口反向压力，那么在相应交换机端口内的任何一个中重置重试计数器。在启用背压后，端口内的重试计数器的复位为CSMA / CD协议提供了获胜冲突中介的更大概率，从而更快地减轻了网络交换机中可能发生的拥塞。

3. 发明授权

US06725270B1 Apparatus and method for programmably modifying a limit of a retry counter in a network switch port in response to exerting backpressure 有权
标题翻译：响应于施加背压而可编程地修改网络交换机端口中的重试计数器的限制的装置和方法
公开(公告)号：US06725270B1
公开(公告)日：2004-04-20
申请号：US09316184
申请日：1999-05-21
申请人： Ching Yu , Bahadir Erimli , Jenny Liu Fischer , Peter Chow
发明人： Ching Yu , Bahadir Erimli , Jenny Liu Fischer , Peter Chow
IPC分类号： G06F1516
CPC分类号： H04L12/413 , H04L67/10 , H04L67/14 , H04L69/329
摘要： A network switch having switch ports for communication of data packets with respective computer network nodes according to CSMA/CD protocol that resets a retry counter for counting data packet transmission attempts within any one of the respective switch ports if backpressure is asserted by that port. A retry limit value for the retry counter is selectively modified according to programmed information to ensure that the total number of retrys does not exceed a maximum total number of allowable retrys. Resetting the retry counter within a port after assertion of backpressure affords the port a greater probability of transmitting earlier under the CSMA/CD protocol, thus more quickly relieving congestion which may occur in the network switch. Selective modification of the retry limit value according to programmed information adds flexibility to vary the maximum total number of allowable retrys based upon current network switch conditions or the priority of a particular data packet.
摘要翻译：具有用于根据CSMA / CD协议与数据分组与各个计算机网络节点进行通信的交换机端口的网络交换机，其复位重试计数器，用于如果该端口的背压被断言，则用于计数任何一个相应交换机端口内的数据分组传输尝试。重试计数器的重试限制值根据编程信息进行选择性修改，以确保反射总数不超过允许的最大总数。在断开背压之后重置端口中的重试计数器，使得端口在CSMA / CD协议下较早发送的可能性更大，从而更快地减轻网络交换机中可能发生的拥塞。根据编程信息对重试限制值的选择性修改增加了灵活性，以根据当前网络切换条件或特定数据包的优先级来改变允许retrys的最大总数。

4. 发明授权

US06563790B1 Apparatus and method for modifying a limit of a retry counter in a network switch port in response to exerting backpressure 有权
标题翻译：响应于施加背压而修改网络交换机端口中的重试计数器的限制的装置和方法
公开(公告)号：US06563790B1
公开(公告)日：2003-05-13
申请号：US09316185
申请日：1999-05-21
申请人： Ching Yu , Bahadir Erimli , Jenny Liu Fischer , Peter Chow
发明人： Ching Yu , Bahadir Erimli , Jenny Liu Fischer , Peter Chow
IPC分类号： G01R3108
CPC分类号： H04L47/10 , H04L47/26 , H04L49/3027 , H04L49/351 , H04L49/506
摘要： A network switch having switch ports for communication of data packets with respective computer network nodes according to CSMA/CD protocol that resets a retry counter for counting data packet transmission attempts within any one of the respective switch ports if backpressure is asserted by that port. A retry limit value for the retry counter is modified to ensure that the total number of retrys does not exceed a maximum total number of allowable retrys. The resetting of the retry counter within a port after assertion of backpressure affords the port a greater probability of transmitting earlier under the CSMA/CD protocol, thus more quickly relieving congestion which may occur in the network switch. The modification of the retry limit value ensures that the number of retrys for the port does not exceed industry standards.
摘要翻译：具有用于根据CSMA / CD协议与数据分组与各个计算机网络节点进行通信的交换机端口的网络交换机，其复位重试计数器，用于如果该端口的背压被断言，则用于计数任何一个相应交换机端口内的数据分组传输尝试。对重试计数器的重试限制值进行修改，以确保retrys总数不超过允许retrys的最大总数。在启用背压后，端口内的重试计数器的重新设置使得端口在CSMA / CD协议下较早发送的可能性更大，从而更快地减轻网络交换机中可能发生的拥塞。重试限制值的修改确保了端口的数量不超过行业标准。

5. 发明授权

US06625157B2 Apparatus and method in a network switch port for transferring data between buffer memory and transmit and receive state machines according to a prescribed interface protocol 有权
标题翻译：网络交换机端口中的装置和方法，用于根据规定的接口协议在缓冲存储器和发送和接收状态机之间传送数据
公开(公告)号：US06625157B2
公开(公告)日：2003-09-23
申请号：US09314977
申请日：1999-05-20
申请人： Autumn Jane Niu , Jenny Liu Fischer
发明人： Autumn Jane Niu , Jenny Liu Fischer
IPC分类号： H04L1228
CPC分类号： H04L12/2854
摘要： A network switch in a packet switched network includes a plurality of network switch ports, each configured for sending and receiving data packets between a medium interface and the network switch. The network switch port includes an IEEE 802.3 compliant transmit state machine and receive state machine configured for transmitting and receiving network data to and from a medium interface, such as a reduced medium independent interface, respectively. The network switch port also includes a memory management unit configured for selectively transferring the network data between the transmit and receive state machines and a random access transmit buffer and a random access receive buffer, respectively. The memory management unit transfers the network data between the transmit and receive state machines and the respective buffers based on prescribed interface protocol signals between the memory management unit and the transmit and receive state machines. Hence, the memory management unit and the transmit and receive state machines transfer data according to a prescribed interface protocol, where a request-based protocol enables data transfers to be performed independent of different clock domains encountered within the network switch port.
摘要翻译：分组交换网络中的网络交换机包括多个网络交换机端口，每个网络交换机端口被配置为在介质接口和网络交换机之间发送和接收数据分组。网络交换机端口包括符合IEEE 802.3标准的传输状态机和接收状态机，其配置用于分别向介质接口（例如简化介质独立接口）发送和接收网络数据。网络交换机端口还包括配置用于分别在发送和接收状态机与随机接入发送缓冲器和随机接入接收缓冲器之间选择性地传送网络数据的存储器管理单元。存储器管理单元基于存储器管理单元和发送和接收状态机之间的规定的接口协议信号，在发送和接收状态机与各个缓冲器之间传送网络数据。因此，存储器管理单元和发送和接收状态机根据规定的接口协议传输数据，其中基于请求的协议使能够独立于在网络交换机端口内遇到的不同时钟域执行数据传输。

6. 发明授权

US06542512B1 Architecture and method for flushing non-transmitted portions of a data frame from a transmitted FIFO buffer 有权
标题翻译：用于从发送的FIFO缓冲器冲洗数据帧的未发送部分的架构和方法
公开(公告)号：US06542512B1
公开(公告)日：2003-04-01
申请号：US09346745
申请日：1999-07-02
申请人： Jenny Liu Fischer , Ching Yu , Jerry Chun-Jen Kuo , Po-Shen Lai , Autumn Jane Niu , Ian Lam
发明人： Jenny Liu Fischer , Ching Yu , Jerry Chun-Jen Kuo , Po-Shen Lai , Autumn Jane Niu , Ian Lam
IPC分类号： H04L1228
CPC分类号： H04L49/901 , H04L47/50 , H04L49/3027 , H04L49/351 , H04L49/90
摘要： A network switch in a packet switched network includes a plurality of network switch ports, each configured for sending and receiving data packets between a medium interface and the network switch. The network switch port includes an IEEE 802.3 compliant transmit state machine and receive state machine configured for transmitting and receiving network data to and from a medium interface, such as a reduced medium independent interface, respectively. The network switch port also includes a memory management unit configured for selectively transferring the network data between the transmit and receive state machines and a random access transmit buffer and a random access receive buffer, respectively. The transmit state machine outputs a flush transmit buffer signal to the transmit memory management unit in response to a detected error in transmitting the transmit data. The transmit memory management unit, in response to the flush transmit buffer signal, sets an incremented transmit buffer pointer value to a buffer pointer value corresponding to a next transmit data stored in the transmit buffer.
摘要翻译：分组交换网络中的网络交换机包括多个网络交换机端口，每个网络交换机端口被配置为在介质接口和网络交换机之间发送和接收数据分组。网络交换机端口包括符合IEEE 802.3标准的传输状态机和接收状态机，其配置用于分别向介质接口（例如简化介质独立接口）发送和接收网络数据。网络交换机端口还包括配置用于分别在发送和接收状态机与随机接入发送缓冲器和随机接入接收缓冲器之间选择性地传送网络数据的存储器管理单元。发送状态机响应于发送发送数据中检测到的错误，向发送存储器管理单元输出清空发送缓冲器信号。发送存储器管理单元响应于刷新发送缓冲器信号，将增加的发送缓冲器指针值设置为对应于存储在发送缓冲器中的下一个发送数据的缓冲器指针值。

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