Methods and apparatus for managing traffic in an atm network
    1.
    发明授权
    Methods and apparatus for managing traffic in an atm network 失效
    用于管理大气网络中的流量的方法和装置

    公开(公告)号:US06243359B1

    公开(公告)日:2001-06-05

    申请号:US09302200

    申请日:1999-04-29

    IPC分类号: H04J302

    摘要: The apparatus includes a separate line side inlet queue for each GFR VC, a single network side outlet queue for all GFR VCs, a single network side inlet queue for all GFR VCs, a single line side outlet bulk processing queue with a post queue packet processor followed by separate line side outlet queues for each line, a network side outlet queue monitor, and a line side inlet queue controller. The network side outlet queue monitor is coupled to the line side inlet queue controller so that the network side outlet queue monitor can send messages to the line side inlet queue controller. According to one of the methods of the invention, the network side outlet queue monitor sends messages to the line side inlet queue controller directing the line side inlet queue controller to send data from the line side GFR queues based on the status of the network side outlet GFR queue. According to another method of the invention, the line to side inlet queue controller discards packets for a GFR VC if congestion is indicated. According to still another method of the invention, the post queue packet processor discards packets above the PCR if the size of the line side outlet bulk processing queue exceeds a threshold size and discards packets above the MCR if discarding packets above the PCR fails to sufficiently reduce the size of the line side outlet bulk processing queue.

    摘要翻译: 该设备包括用于每个GFR VC的单独的线路侧入口队列,用于所有GFR VC的单个网络侧出口队列,用于所有GFR VC的单个网络侧入口队列,具有后队列分组处理器的单个线路侧出口批量处理队列 后面是每一行的单独的线路侧出口队列,网络侧出口队列监视器和线路侧入口队列控制器。 网络侧出口队列监视器耦合到线路侧入口队列控制器,使网络侧出口队列监视器可以向线路侧入口队列控制器发送消息。 根据本发明的一种方法,网络侧出口队列监视器向线路侧入口队列控制器发送消息,指示线路侧入口队列控制器基于网络侧出口的状态从线路侧GFR队列发送数据 GFR队列 根据本发明的另一种方法,如果指示拥塞,则线对侧入口队列控制器丢弃用于GFR VC的分组。 根据本发明的另一种方法,如果线路侧出口批量处理队列的大小超过阈值大小并且如果丢弃上述PCR上的分组,则丢弃MCR上方的分组,则后队列分组处理器丢弃PCR上方的分组, 线路端口批量处理队列的大小。

    Method for switching ATM, TDM, and packet data through a single communications switch
    2.
    发明授权
    Method for switching ATM, TDM, and packet data through a single communications switch 有权
    通过单个通信交换机切换ATM,TDM和分组数据的方法

    公开(公告)号:US06636515B1

    公开(公告)日:2003-10-21

    申请号:US09717999

    申请日:2000-11-21

    IPC分类号: H04L1228

    CPC分类号: H04L12/6402 H04L2012/6413

    摘要: A network switch includes at least one port processor and at least one switch element. The port processor has an SONET OC-x interface (for TDM traffic), a UTOPIA interface (for ATM and packet traffic), and an interface to the switch element. In one embodiment, the port processor has a total I/O bandwidth equivalent to an OC-48, and the switch element has 12×12 ports for a total bandwidth of 30 Gbps. A typical switch includes multiple port processors and switch elements. A data frame of 9 rows by 1700 slots is used to transport ATM, TDM, and Packet data from a port processor through one or more switch elements to the same or another port processor. Each frame is transmitted in 125 microseconds; each row in 13.89 microseconds. Each slot includes a 4-bit tag plus a 4-byte payload. The slot bandwidth is 2.592 Mbps which is large enough to carry an E-1 signal with overhead. The 4-bit tag is a cross connect pointer which is setup when a TDM connection is provisioned. The last twenty slots of the frame are reserved for link overhead. Thus, the frame is capable of carrying the equivalent of 1,680 E-1 TDM signals. For ATM and packet data, a PDU (protocol data unit) of 16 slots is defined for a 64-byte payload. The PDUs are self-routed through the switch with a 28-bit routing tag which allows routing through seven switch stages using 4-bits per stage. Bandwidth is arbitrated among ATM and Packet connections while maintaining TDM timing.

    摘要翻译: 网络交换机包括至少一个端口处理器和至少一个开关元件。 端口处理器具有SONET OC-x接口(用于TDM流量),UTOPIA接口(用于ATM和数据包流量)以及与交换机元件的接口。 在一个实施例中,端口处理器具有等同于OC-48的总I / O带宽,并且交换单元具有12×12端口,总带宽为30Gbps。 典型的交换机包括多个端口处理器和交换机元件。 使用9行×1700个时隙的数据帧将ATM,TDM和分组数据从端口处理器通过一个或多个交换元件传输到相同或另一个端口处理器。 每帧在125微秒内传输; 每行在13.89微秒。 每个插槽包括一个4位标签加上一个4字节的有效载荷。 时隙带宽为2.592Mbps,足够大以承载具有开销的E-1信号。 4位标签是交叉连接指针,当指定TDM连接时,该指针将被设置。 帧的最后20个时隙被保留用于链路开销。 因此,该帧能够承载1,680个E-1 TDM信号的等效物。 对于ATM和分组数据,为64字节的有效载荷定义了16个时隙的PDU(协议数据单元)。 PDU通过具有28位路由标签的交换机进行自路由,该路由标签允许通过每个阶段使用4位的七个交换阶段进行路由。 在保持TDM定时的同时,在ATM和分组连接之间仲裁带宽。

    Network switch which supports TDM, ATM, and variable length packet traffic and includes automatic fault/congestion correction
    4.
    发明授权
    Network switch which supports TDM, ATM, and variable length packet traffic and includes automatic fault/congestion correction 有权
    支持TDM,ATM和可变长度数据包流量的网络交换机,包括自动故障/拥塞纠正

    公开(公告)号:US06646983B1

    公开(公告)日:2003-11-11

    申请号:US09717998

    申请日:2000-11-21

    IPC分类号: H04J314

    CPC分类号: H04L12/6402 H04L2012/6413

    摘要: A network switch includes at least one port processor and at least one switch element. The port processor has an SONET OC-x interface (for TDM traffic), a UTOPIA interface (for ATM and packet traffic), and an interface to the switch element. In one embodiment, the port processor has a total I/O bandwidth equivalent to an OC-48, and the switch element has 12×12 ports for a total bandwidth of 30 Gbps. A typical switch includes multiple port processors and switch elements. A data frame of 9 rows by 1700 slots is used to transport ATM, TDM, and Packet data from a port processor through one or more switch elements to the same or another port processor. Each frame is transmitted in 125 microseconds; each row in 13.89 microseconds. Each slot includes a 4-bit tag plus a 4-byte payload. The slot bandwidth is 2.592 Mbps which is large enough to carry an E-1 signal with overhead. The 4-bit tag is a cross connect pointer which is setup when a TDM connection is provisioned. The last twenty slots of the frame are reserved for link overhead. Thus, the frame is capable of carrying the equivalent of 1,680 E-1 TDM signals. For ATM and packet data, a PDU (protocol data unit) of 16 slots is defined for a 64-byte payload. The PDUs are self-routed through the switch with a 28-bit routing tag which allows routing through seven switch stages using 4-bits per stage. Bandwidth is arbitrated among ATM and Packet connections while maintaining TDM timing.

    摘要翻译: 网络交换机包括至少一个端口处理器和至少一个开关元件。 端口处理器具有SONET OC-x接口(用于TDM流量),UTOPIA接口(用于ATM和数据包流量)以及与交换机元件的接口。 在一个实施例中,端口处理器具有等同于OC-48的总I / O带宽,并且交换单元具有12×12端口,总带宽为30Gbps。 典型的交换机包括多个端口处理器和交换机元件。 使用9行×1700个时隙的数据帧将ATM,TDM和分组数据从端口处理器通过一个或多个交换元件传输到相同或另一个端口处理器。 每帧在125微秒内传输; 每行在13.89微秒。 每个插槽包括一个4位标签加上一个4字节的有效载荷。 时隙带宽为2.592Mbps,足够大以承载具有开销的E-1信号。 4位标签是交叉连接指针,当指定TDM连接时,该指针将被设置。 帧的最后20个时隙被保留用于链路开销。 因此,该帧能够承载1,680个E-1 TDM信号的等效物。 对于ATM和分组数据,为64字节的有效载荷定义了16个时隙的PDU(协议数据单元)。 PDU通过具有28位路由标签的交换机进行自路由,该路由标签允许通过每个阶段使用4位的七个交换阶段进行路由。 在保持TDM定时的同时,在ATM和分组连接之间仲裁带宽。

    Method and apparatus for switching ATM, TDM, and packet data through a single communications switch while maintaining TDM timing
    5.
    发明授权
    Method and apparatus for switching ATM, TDM, and packet data through a single communications switch while maintaining TDM timing 有权
    用于在保持TDM定时的同时通过单个通信交换机切换ATM,TDM和分组数据的方法和装置

    公开(公告)号:US06631130B1

    公开(公告)日:2003-10-07

    申请号:US09717440

    申请日:2000-11-21

    IPC分类号: H04L1266

    摘要: A network switch includes at least one port processor and at least one switch element. The port processor has an SONET OC-x interface (for TDM traffic), a UTOPIA interface (for ATM and packet traffic), and an interface to the switch element. In one embodiment, the port processor has a total I/O bandwidth equivalent to an OC-48, and the switch element has 12×12 ports for a total bandwidth of 30 Gbps. A typical switch includes multiple port processors and switch elements. A data frame of 9 rows by 1700 slots is used to transport ATM, TDM, and Packet data from a port processor through one or more switch elements to the same or another port processor. Each frame is transmitted in 125 microseconds; each row in 13.89 microseconds. Each slot includes a 4-bit tag plus a 4-byte payload. The slot bandwidth is 2.592 Mbps which is large enough to carry an E-1 signal with overhead. The 4-bit tag is a cross connect pointer which is setup when a TDM connection is provisioned. The last twenty slots of the frame are reserved for link overhead. Thus, the frame is capable of carrying the equivalent of 1,680 E-1 TDM signals. For ATM and packet data, a PDU (protocol data unit) of 16 slots is defined for a 64-byte payload. The PDUs are self-routed through the switch with a 28-bit routing tag which allows routing through seven switch stages using 4-bits per stage. Bandwidth is arbitrated among ATM and Packet connections while maintaining TDM timing.

    摘要翻译: 网络交换机包括至少一个端口处理器和至少一个开关元件。 端口处理器具有SONET OC-x接口(用于TDM流量),UTOPIA接口(用于ATM和数据包流量)以及与交换机元件的接口。 在一个实施例中,端口处理器具有等同于OC-48的总I / O带宽,并且交换单元具有12×12端口,总带宽为30Gbps。 典型的交换机包括多个端口处理器和交换机元件。 使用9行×1700个时隙的数据帧将ATM,TDM和分组数据从端口处理器通过一个或多个交换元件传输到相同或另一个端口处理器。 每帧在125微秒内传输; 每行在13.89微秒。 每个插槽包括一个4位标签加上一个4字节的有效载荷。 时隙带宽为2.592Mbps,足够大以承载具有开销的E-1信号。 4位标签是交叉连接指针,当指定TDM连接时,该指针将被设置。 帧的最后20个时隙被保留用于链路开销。 因此,该帧能够承载1,680个E-1 TDM信号的等效物。 对于ATM和分组数据,为64字节的有效载荷定义了16个时隙的PDU(协议数据单元)。 PDU通过具有28位路由标签的交换机进行自路由,该路由标签允许通过每个阶段使用4位的七个交换阶段进行路由。 在保持TDM定时的同时,在ATM和分组连接之间仲裁带宽。