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1. 发明授权

US07453798B2 Active flow management with hysteresis 失效
标题翻译：主动流量管理带滞后
公开(公告)号：US07453798B2
公开(公告)日：2008-11-18
申请号：US10782617
申请日：2004-02-19
申请人： Jeffrey P. Bradford , Gordon T. Davis , Dongming Hwang , Clark D. Jeffries , Srinivasan Ramani , Kartik Sudeep , Ken V. Vu
发明人： Jeffrey P. Bradford , Gordon T. Davis , Dongming Hwang , Clark D. Jeffries , Srinivasan Ramani , Kartik Sudeep , Ken V. Vu
IPC分类号： H04L12/00
CPC分类号： H04L47/10 , H04L47/29 , H04L47/323
摘要： The present invention provides for a computer network method and system that applies “hysteresis” to an active queue management algorithm. If a queue is at a level below a certain low threshold and a burst of packets arrives at a network node, then the probability of dropping the initial packets in the burst is recalculated, but the packets are not dropped. However, if the queue level crosses beyond a hysteresis threshold, then packets are discarded pursuant to a drop probability.Also, according to the present invention, queue level may be decreased until it becomes less than the hysteresis threshold, with packets dropped per the drop probability until the queue level decreases to at least a low threshold. In one embodiment, an adaptive algorithm is also provided to adjust the transmit probability for each flow together with hysteresis to increase the packet transmit rates to absorb bursty traffic.
摘要翻译：本发明提供一种向活动队列管理算法应用“迟滞”的计算机网络方法和系统。如果队列处于低于某个低阈值的水平，并且一群数据包到达网络节点，则重新计算突发中丢弃初始数据包的概率，但不会丢弃数据包。然而，如果队列级别超过滞后阈值，则根据丢弃概率丢弃数据包。此外，根据本发明，可以减少队列级别，直到其变得小于滞后阈值，其中每个丢弃概率的分组丢弃，直到队列级别降低到至少低阈值。在一个实施例中，还提供自适应算法来调整每个流的发送概率以及迟滞以增加分组传输速率以吸收突发业务。

2. 发明申请

US20050185581A1 Active flow management with hysteresis 失效
标题翻译：主动流量管理带滞后
公开(公告)号：US20050185581A1
公开(公告)日：2005-08-25
申请号：US10782617
申请日：2004-02-19
申请人： Jeffrey Bradford , Gordon Davis , Dongming Hwang , Clark Jeffries , Srinivasan Ramani , Kartik Sudeep , Ken Vu
发明人： Jeffrey Bradford , Gordon Davis , Dongming Hwang , Clark Jeffries , Srinivasan Ramani , Kartik Sudeep , Ken Vu
IPC分类号： H04L12/56 , H04J3/16
CPC分类号： H04L47/10 , H04L47/29 , H04L47/323
摘要： The present invention provides for a computer network method and system that applies “hysteresis” to an active queue management algorithm. If a queue is at a level below a certain low threshold and a burst of packets arrives at a network node, then the probability of dropping the initial packets in the burst is recalculated, but the packets are not dropped. However, if the queue level crosses beyond a hysteresis threshold, then packets are discarded pursuant to a drop probability. Also, according to the present invention, queue level may be decreased until it becomes less than the hysteresis threshold, with packets dropped per the drop probability until the queue level decreases to at least a low threshold. In one embodiment, an adaptive algorithm is also provided to adjust the transmit probability for each flow together with hysteresis to increase the packet transmit rates to absorb bursty traffic.
摘要翻译：本发明提供一种向活动队列管理算法应用“迟滞”的计算机网络方法和系统。如果队列处于低于某个低阈值的水平，并且一群数据包到达网络节点，则重新计算突发中丢弃初始数据包的概率，但不会丢弃数据包。然而，如果队列级别超过滞后阈值，则根据丢弃概率丢弃数据包。此外，根据本发明，可以减少队列级别，直到其变得小于滞后阈值，其中每个丢弃概率的分组丢弃，直到队列级别降低到至少低阈值。在一个实施例中，还提供自适应算法来调整每个流的发送概率以及迟滞以增加分组传输速率以吸收突发业务。

3. 发明授权

US07855966B2 Network congestion detection and automatic fallback: methods, systems and program products 失效
标题翻译：网络拥塞检测和自动回退：方法，系统和程序产品
公开(公告)号：US07855966B2
公开(公告)日：2010-12-21
申请号：US11348417
申请日：2006-02-07
申请人： Youssef Abdelilah , Gordon T. Davis , Jeffrey H. Derby , Dongming Hwang , Clark D. Jeffries , Malcolm S. Ware , Hua Ye
发明人： Youssef Abdelilah , Gordon T. Davis , Jeffrey H. Derby , Dongming Hwang , Clark D. Jeffries , Malcolm S. Ware , Hua Ye
IPC分类号： H04L12/26
CPC分类号： H04L47/10 , H04L12/6418 , H04L29/06027 , H04L47/12 , H04L47/2425 , H04L47/263 , H04L47/70 , H04L47/745 , H04L47/748 , H04L47/762 , H04L65/1009 , H04L65/607 , H04L65/80 , H04L2012/6481 , H04L2012/6497
摘要： A codec detects congestion in a packet network and responds via a session control protocol to re-negotiate codec-type and/or parameters with the receiving codec to reduce bit rate for supporting a session. Once the connection and session are established, encoded packets start flowing between the two codecs. A control entity sends and receives network congestion control packets periodically in the session. The congestion control packets provide a “heartbeat” signal to the receiving codec. When the network is not congested, all “heartbeat” packets will be passed through the network. As network congestion increases, routers within the network discard excess packets to prevent network failure. The codecs respond to the missing packets by slowing down the bit rate or proceeding to renegotiate a lower bit rate via the session control protocol. If there are no missing packets, the codecs detect if the session is operating at the highest bit rate, and if not, re-negotiate a higher bit rate.
摘要翻译：编解码器检测分组网络中的拥塞，并通过会话控制协议进行响应，以使用接收编解码器重新协商编解码器类型和/或参数，以减少支持会话的比特率。一旦建立了连接和会话，编码的数据包将在两个编解码器之间开始流动。控制实体在会话中定期发送和接收网络拥塞控制报文。拥塞控制分组向接收编解码器提供“心跳”信号。当网络不拥塞时，所有“心跳”数据包将通过网络传递。随着网络拥塞的增加，网络内的路由器丢弃多余的数据包，防止网络故障。编解码器通过减慢比特率或通过会话控制协议进行重新协商较低的比特率来响应丢失的分组。如果没有丢失数据包，则编解码器检测会话是否以最高比特率运行，如果不是，则重新协商更高的比特率。

4. 发明授权

US06701389B2 Bandwidth allocation in accordance with shared queue output limit 失效
标题翻译：带宽分配按照共享队列输出限制
公开(公告)号：US06701389B2
公开(公告)日：2004-03-02
申请号：US09876358
申请日：2001-06-07
申请人： Brahmanand Kumar Gorti , Dongming Hwang , Clark Debs Jeffries , Michael Steven Siegel , Kartik Sudeep
发明人： Brahmanand Kumar Gorti , Dongming Hwang , Clark Debs Jeffries , Michael Steven Siegel , Kartik Sudeep
IPC分类号： G06F300
CPC分类号： H04L47/30 , H04L47/10 , H04L47/263 , H04L47/32 , Y02D50/10
摘要： A method for dynamically adjusting the flow rate of a plurality of logical pipes that share a common output queue. In accordance with the method of the present invention, a minimum flow rate and a maximum flow rate are set for each of the pipes. Next a determination is made of whether or not excess queue bandwidth exists in accordance with the output flow rate of the shared queue. The determination of whether or not excess bandwidth exists comprises comparing the output flow rate of the shared queue with a pre-determined threshold queue output value. An instantaneous excess bandwidth signal has a value of 1 if there is excess bandwidth and is otherwise 0 if there is no excess bandwidth. In an alternate embodiment, the instantaneous excess bandwidth signal for a particular pipe is logically ANDed with one or more additional excess bandwidth signals to form a composite instantaneous excess bandwidth signal. In response to the existence of excess queue bandwidth, a flow rate of a pipe is linearly increased while in response to a lack of excess queue bandwidth, the flow rate of the pipe is exponentially decreased.
摘要翻译：一种用于动态调整共享公共输出队列的多个逻辑管道的流量的方法。根据本发明的方法，为每个管设定最小流量和最大流量。接下来，根据共享队列的输出流量确定是否存在过量队列带宽。确定是否存在超量带宽包括将共享队列的输出流量与预定阈值队列输出值进行比较。如果存在过多的带宽，则瞬时过量带宽信号的值为1，如果没有超额带宽，则为0。在替代实施例中，用于特定管道的瞬时过量带宽信号与一个或多个附加过量带宽信号进行逻辑“与”，以形成复合瞬时过量带宽信号。响应于存在多余的队列带宽，管道的流量线性增加，同时响应于缺少多余的队列带宽，管道的流量呈指数下降。

5. 发明授权

US07792873B2 Data structure supporting random delete and timer function 失效
标题翻译：数据结构支持随机删除和定时功能
公开(公告)号：US07792873B2
公开(公告)日：2010-09-07
申请号：US12015198
申请日：2008-01-16
申请人： Gordon T. Davis , Marco Heddes , Dongming Hwang
发明人： Gordon T. Davis , Marco Heddes , Dongming Hwang
IPC分类号： G06F17/30 , G06F7/00
CPC分类号： G06F17/30955 , Y10S707/99933 , Y10S707/99942
摘要： A procedure is used to provide data structures that handle large numbers of active data entries and a high rate of additions and deletions of active entries. The procedure utilizes one or more of the following modifications. Timers are removed from individual session table entries and are linked via pointers. Bilateral links are established between the session table and the timer structure. Aging/timer checks are applied to the timer control block (TCB). A chain of TCBs, optionally including an excess of blocks, may be used along with packing of multiple TCBs into a single memory location. This excess of blocks permits a terminated session to continue to occupy a TCB until the timer process progresses to that block location in the chain of blocks.
摘要翻译：一个过程用于提供处理大量活动数据条目的数据结构以及高活动条目的添加和删除率。该过程利用以下一个或多个修改。定时器从单个会话表条目中删除，并通过指针进行链接。在会话表和定时器结构之间建立双向链路。老化/定时器检查应用于定时器控制块（TCB）。可以使用可选地包括多余块的TCB链，以及将多个TCB打包到单个存储器位置中。这个多余的块允许终止的会话继续占用TCB，直到定时器进程前进到块链中的块位置。

6. 发明申请

US20080133467A1 DATA STRUCTURE SUPPORTING RANDOM DELETE AND TIMER FUNCTION 失效
标题翻译：数据结构支持随机删除和定时器功能
公开(公告)号：US20080133467A1
公开(公告)日：2008-06-05
申请号：US12015198
申请日：2008-01-16
申请人： Gordon T. Davis , Marco Heddes , Dongming Hwang
发明人： Gordon T. Davis , Marco Heddes , Dongming Hwang
IPC分类号： G06F7/10 , G06F17/30 , G06F7/00
CPC分类号： G06F17/30955 , Y10S707/99933 , Y10S707/99942
摘要： A procedure is used to provide data structures that handle large numbers of active data entries and a high rate of additions and deletions of active entries. The procedure utilizes one or more of the following modifications. Timers are removed from individual session table entries and are linked via pointers. Bilateral links are established between the session table and the timer structure. Aging/timer checks are applied to the timer control block (TCB). A chain of TCBs, optionally including an excess of blocks, may be used along with packing of multiple TCBs into a single memory location. This excess of blocks permits a terminated session to continue to occupy a TCB until the timer process progresses to that block location in the chain of blocks.
摘要翻译：一个过程用于提供处理大量活动数据条目的数据结构以及高活动条目的添加和删除率。该过程利用以下一个或多个修改。定时器从单个会话表条目中删除，并通过指针进行链接。在会话表和定时器结构之间建立双向链路。老化/定时器检查应用于定时器控制块（TCB）。可以使用可选地包括多余块的TCB链，以及将多个TCB打包到单个存储器位置中。这个多余的块允许终止的会话继续占用TCB，直到定时器进程前进到块链中的块位置。

7. 发明授权

US07412454B2 Data structure supporting random delete and timer function 失效
标题翻译：数据结构支持随机删除和定时功能
公开(公告)号：US07412454B2
公开(公告)日：2008-08-12
申请号：US10654139
申请日：2003-09-03
申请人： Gordon T. Davis , Marco Heddes , Dongming Hwang
发明人： Gordon T. Davis , Marco Heddes , Dongming Hwang
IPC分类号： G06F17/30 , G06F7/00
CPC分类号： G06F17/30955 , Y10S707/99933 , Y10S707/99942
摘要： A procedure is used to provide data structures that handle large numbers of active data entries and a high rate of additions and deletions of active entries. The procedure utilizes one or more of the following modifications. Timers are removed from individual session table entries and are linked via pointers. Bilateral links are established between the session table and the timer structure. Aging/timer checks are applied to the timer control block (TCB). A chain of TCBs, optionally including an excess of blocks, may be used along with packing of multiple TCBs into a single memory location. This excess of blocks permits a terminated session to continue to occupy a TCB until the timer process progresses to that block location in the chain of blocks.
摘要翻译：一个过程用于提供处理大量活动数据条目的数据结构以及高活动条目的添加和删除率。该过程利用以下一个或多个修改。定时器从单个会话表条目中删除，并通过指针进行链接。在会话表和定时器结构之间建立双向链路。老化/定时器检查应用于定时器控制块（TCB）。可以使用可选地包括多余块的TCB链，以及将多个TCB打包到单个存储器位置中。这个多余的块允许终止的会话继续占用TCB，直到定时器进程前进到块链中的块位置。

8. 发明授权

US07072344B2 Redistribution of excess bandwidth in networks for optimized performance of voice and data sessions: methods, systems and program products 失效
标题翻译：在网络中重新分配超额带宽，以优化语音和数据会话的性能：方法，系统和程序产品
公开(公告)号：US07072344B2
公开(公告)日：2006-07-04
申请号：US09906485
申请日：2001-07-16
申请人： Youssef Abdelilah , Gordon Taylor Davis , Jeffrey Haskell Derby , Dongming Hwang , Clark Debs Jeffries , Malcolm Scott Ware , Hua Ye
发明人： Youssef Abdelilah , Gordon Taylor Davis , Jeffrey Haskell Derby , Dongming Hwang , Clark Debs Jeffries , Malcolm Scott Ware , Hua Ye
IPC分类号： H04L12/56
CPC分类号： H04L65/80 , H04L29/06027 , H04L47/70 , H04L47/745 , H04L47/748 , H04L47/765 , H04L47/801
摘要： A packet network redistributes excess bandwidth for voice and data sessions applying a Quality of Service (QoS) algorithm. The network includes interacting client stations using H.323 protocol managing bit rate according to an algorithm as voice and data sessions are added or removed from the network. The client stations include codecs coupled to the network. The codecs provide voice sessions at a minimum bandwidth using a voice codec bit rate and preferred bandwidth using another voice codec bit rate. A first algorithm applies the QoS algorithm allocating bandwidth between interacting client stations after the addition of a new voice or data session when there is insufficient bandwidth for the new session to receive preferred bandwidth. A second algorithm is applied when a voice or data session is removed from the interacting client stations. If any session is allocated minimum bandwidth the QoS increases a voice session at minimum bandwidth to preferred bandwidth if excess bandwidth is available.
摘要翻译：分组网络重新分配应用服务质量（QoS）算法的语音和数据会话的多余带宽。该网络包括使用H.323协议的交互式客户端站，根据算法管理比特率，因为语音和数据会话被从网络添加或删除。客户端站包括耦合到网络的编解码器。编解码器使用语音编解码器比特率和使用另一语音编解码器比特率的优选带宽以最小带宽提供语音会话。第一种算法在增加新的语音或数据会话之后，在新会话接收到优先带宽的带宽不足的情况下，应用QoS算法在交互的客户端站之间分配带宽。当从交互的客户端站移除语音或数据会话时，应用第二种算法。如果任何会话被分配最小带宽，则QoS会将最小带宽的语音会话增加到优先带宽，如果有超额带宽可用。

9. 发明授权

US07068601B2 Codec with network congestion detection and automatic fallback: methods, systems & program products 失效
公开(公告)号：US07068601B2
公开(公告)日：2006-06-27
申请号：US09906406
申请日：2001-07-16
申请人： Youssef Abdelilah , Gordon Taylor Davis , Jeffrey Haskell Derby , Dongming Hwang , Clark Debs Jeffries , Malcolm Scott Ware , Hua Ye
发明人： Youssef Abdelilah , Gordon Taylor Davis , Jeffrey Haskell Derby , Dongming Hwang , Clark Debs Jeffries , Malcolm Scott Ware , Hua Ye
IPC分类号： H04L12/26 , H04L12/66 , G01R31/08
CPC分类号： H04L65/607 , H04L12/6418 , H04L29/06027 , H04L47/10 , H04L47/12 , H04L47/2425 , H04L47/263 , H04L47/70 , H04L47/745 , H04L47/748 , H04L47/762 , H04L65/1009 , H04L65/80 , H04L2012/6481 , H04L2012/6497
摘要： A codec detects congestion in a packet network and responds via a session control protocol to re-negotiate codec-type and/or parameters with the receiving codec to reduce bit rate for supporting a session. Once the connection and session are established, encoded packets start flowing between the two codecs. A control entity sends and receives network congestion control packets periodically in the session. The congestion control packets provide a “heartbeat” signal to the receiving codec. When the network is not congested, all “heartbeat” packets will be passed through the network As network congestion increases, routers within the network discard excess packets to prevent network failure. The codecs respond to the missing packets by slowing down the bit rate or proceeding to renegotiate a lower bit rate via the session control protocol. If there are no missing packets, the codecs detect if the session is operating at the highest bit rate, and if not, re-negotiate a higher bit rate.

10. 发明授权

US07042841B2 Controlling network congestion using a biased packet discard policy for congestion control and encoded session packets: methods, systems, and program products 有权
公开(公告)号：US07042841B2
公开(公告)日：2006-05-09
申请号：US09906499
申请日：2001-07-16
申请人： Youssef Abdelilah , Gordon Taylor Davis , Jeffrey Haskell Derby , Dongming Hwang , Clark Debs Jeffries , Malcolm Scott Ware , Hua Ye
发明人： Youssef Abdelilah , Gordon Taylor Davis , Jeffrey Haskell Derby , Dongming Hwang , Clark Debs Jeffries , Malcolm Scott Ware , Hua Ye
IPC分类号： H04L12/26
CPC分类号： H04L47/10 , H04L47/263
摘要： A packet network congestion control system using a biased packet discard policy includes a plurality of end points having codecs operating in a framework, e.g. ITU-T H.323 protocol to establish a communication session. The protocol enables the codecs to negotiate codec type and associated parameters. Once a connection and session are established, compressed voice and data packets start flowing between the two end points. A control entity supplies congestion control packets periodically. The control packets provide a “heartbeat” signal to the codec at the other end of the session. Each codec receiver uses the “heartbeat” signal as an indication of network congestion. As network congestion increases, routers within the network discard excess packets to prevent network failure. The network discards all packets classified as congestion control packets whenever a flow control mechanism detects congestion or a trend toward congestion. As packets are discarded, the end points renegotiate codec type and/or parameters to realize lower bit rates.

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