公开(公告)号：US07339899B2

公开(公告)日：2008-03-04

申请号：US10955578

申请日：2004-09-30

申请人： Yunxin Liu ,  Zheng Ni ,  Jian Wang ,  Qian Zhang ,  Wenwu Zhu

发明人： Yunxin Liu ,  Zheng Ni ,  Jian Wang ,  Qian Zhang ,  Wenwu Zhu

IPC分类号： H04L12/26

CPC分类号： H04L41/145 ,  H04L41/0803

摘要： Emulating a packet reorder condition in a network includes maintaining a counter variable to count packets sent out since the most recent reordered packet. When a new packet arrives, if the counter variable is less than or equal to zero, a current packet lag value is determined. If the current packet lag value is not equal to zero, the new packet is delayed before being sent out in accordance with the lag value, and the counter is updated with the lag value. Otherwise, the new packet is sent out without delay and the counter is decreased by one. The current packet lag value is computed based on supplied configuration parameters. Delaying the new packet includes applying a latency to the packet, the latency comprising a time cost to transmit the packet multiplied by the current packet lag value.

摘要翻译： 仿真网络中的分组重排条件包括维持计数器变量来计算自最近重新排序的分组以来发送的分组。 当新分组到达时，如果计数器变量小于或等于零，则确定当前分组滞后值。 如果当前分组滞后值不等于零，则根据滞后值发送新分组之前被延迟，并且用滞后值更新计数器。 否则，新的数据包被发送出没有延迟，计数器减1。 根据提供的配置参数计算当前数据包滞后值。 延迟新分组包括对分组应用等待时间，等待时间包括传送分组乘以当前分组滞后值的时间成本。

公开(公告)号：US07260826B2

公开(公告)日：2007-08-21

申请号：US09865941

申请日：2001-05-25

申请人： Qian Zhang ,  Ya-Qin Zhang ,  Wenwu Zhu

发明人： Qian Zhang ,  Ya-Qin Zhang ,  Wenwu Zhu

IPC分类号： H04N1/173 ,  H04N7/12 ,  H04N7/18

CPC分类号： H04L47/822 ,  H04L47/15 ,  H04L47/193 ,  H04L47/2416 ,  H04L47/263 ,  H04L47/28 ,  H04L47/70 ,  H04L47/762 ,  H04L47/801 ,  H04N7/173 ,  H04N21/234318 ,  H04N21/234354 ,  H04N21/2381 ,  H04N21/2402 ,  H04N21/2662 ,  H04N21/4381 ,  H04N21/44209 ,  H04N21/64322 ,  H04N21/6582

摘要： A resource allocation of multiple compressed AV streams delivered over the Internet is disclosed that achieves end-to-end optimal quality through a multimedia streaming TCP-friendly transport (MSTFP) protocol that adaptively estimates the network bandwidth while smoothing the sending rate. Resources allocated dynamically according to a media encoding distortion and network degradation algorithm. A scheme is also disclosed for dynamically estimating the available network bandwidth for streaming of objects, such as MPEG-4 multiple video objects, in conjunction with the MSTFP protocol. The scheme can account for packet-loss rates to minimize end-to-end distortion for media delivery.

摘要翻译： 公开了通过互联网传送的多个压缩AV流的资源分配，其通过自适应地估计网络带宽同时平滑发送速率的多媒体流TCP协议传输（MSTFP）协议来实现端到端的最佳质量。 根据媒体编码失真和网络退化算法动态分配资源。 还公开了一种结合MSTFP协议来动态估计用于诸如MPEG-4多视频对象的对象流的可用网络带宽的方案。 该方案可以解决丢包率，以尽量减少媒体传输的端到端失真。

公开(公告)号：US07154869B2

公开(公告)日：2006-12-26

申请号：US11168254

申请日：2005-06-27

申请人： Zihua Guo ,  Qian Zhang ,  Richard Yao ,  Wenwu Zhu

发明人： Zihua Guo ,  Qian Zhang ,  Richard Yao ,  Wenwu Zhu

IPC分类号： H04Q7/00 ,  H04Q7/20

CPC分类号： H04W36/0088 ,  H04W36/04 ,  H04W36/14 ,  H04W36/22

摘要： A system and method for improved vertical handoff between different types of wireless network. Network allocation vector occupation and packet collision probability are used as quality of service measures, enabling vertical handoffs to be delayed until actually beneficial to quality of service. Improved wireless network cell boundary detection in vertical handoff scenarios is achieved with a Fourier-based technique in conjunction with an adaptively determined minimum operating signal strength threshold. Improved wireless network cell boundary detection enables vertical handoffs from high quality of service networks to be delayed as long as possible. Together, practical wireless network quality of service measures and improved detection of wireless network cell boundaries in vertical handoff scenarios reduce the rate of unnecessary vertical handoff resulting in higher overall quality of service experienced by a mobile computing device roaming between wireless network types.

公开(公告)号：US20060072628A1

公开(公告)日：2006-04-06

申请号：US10955578

申请日：2004-09-30

申请人： Yunxin Liu ,  Zheng Ni ,  Jian Wang ,  Qian Zhang ,  Wenwu Zhu

发明人： Yunxin Liu ,  Zheng Ni ,  Jian Wang ,  Qian Zhang ,  Wenwu Zhu

IPC分类号： H04J3/06

CPC分类号： H04L41/145 ,  H04L41/0803

摘要： Emulating a packet reorder condition in a network includes maintaining a counter variable to count packets sent out since the most recent reordered packet. When a new packet arrives, if the counter variable is less than or equal to zero, a current packet lag value is determined. If the current packet lag value is not equal to zero, the new packet is delayed before being sent out in accordance with the lag value, and the counter is updated with the lag value. Otherwise, the new packet is sent out without delay and the counter is decreased by one. The current packet lag value is computed based on supplied configuration parameters. Delaying the new packet includes applying a latency to the packet, the latency comprising a time cost to transmit the packet multiplied by the current packet lag value.

摘要翻译： 仿真网络中的分组重排条件包括维持计数器变量来计算自最近重新排序的分组以来发送的分组。 当新分组到达时，如果计数器变量小于或等于零，则确定当前分组滞后值。 如果当前分组滞后值不等于零，则根据滞后值发送新分组之前被延迟，并且用滞后值更新计数器。 否则，新的数据包被发送出没有延迟，计数器减1。 根据提供的配置参数计算当前数据包滞后值。 延迟新分组包括对分组应用等待时间，延迟包括传送分组乘以当前分组滞后值的时间成本。

公开(公告)号：US20050201279A1

公开(公告)日：2005-09-15

申请号：US10800897

申请日：2004-03-15

申请人： Kun Tan ,  Qian Zhang ,  Wenwu Zhu

发明人： Kun Tan ,  Qian Zhang ,  Wenwu Zhu

IPC分类号： H04L1/18 ,  H04L12/28 ,  H04L12/56 ,  H04L29/06 ,  H04L29/08 ,  H04W28/04 ,  H04W28/08 ,  H04L12/26

CPC分类号： H04L47/10 ,  H04L1/188 ,  H04L47/193 ,  H04L47/283 ,  H04L69/16 ,  H04L69/161 ,  H04L69/163 ,  H04W28/08

摘要： A spurious timeout (STO) response allows a sending device to conservatively adjust congestion state parameters and maintain the packet flow, after detection of the STO. Since occurrence of an STO may be accompanied by data loss, the STO response couples the spurious timeout and the loss event by maintaining a value of previously available bandwidth and increasing a limit that a sending host can send based on a pattern of returned acknowledgements. In particular, the limit is increased by the maximum size of a data segment that the sending host can send each time an acknowledgement is received from the receiving host indicating a successful transmission of a data packet. Thus, a positive data flow may be maintained conservatively while avoiding further packet losses and an unnecessary re-transmission of data packets that may have been successfully received by the receiving host.

摘要翻译： 假超时（STO）响应允许发送设备在检测到STO之后保守地调整拥塞状态参数并维护分组流。 由于STO的发生可能伴随着数据丢失，STO响应通过维持先前可用带宽的值并且增加发送主机可以基于返回的确认的模式发送的限制来耦合虚假超时和丢失事件。 特别地，每当从接收主机接收到指示数据分组的成功发送的确认时，发送主机可以发送的数据段的最大大小增加限制。 因此，可以保守地保持正数据流，同时避免进一步的分组丢失和可能已经被接收主机成功接收的数据分组的不必要的重新传输。

公开(公告)号：US20050155080A1

公开(公告)日：2005-07-14

申请号：US11044405

申请日：2005-01-27

申请人： Qian Zhang ,  Ya-Qin Zhang ,  Wenwu Zhu

发明人： Qian Zhang ,  Ya-Qin Zhang ,  Wenwu Zhu

IPC分类号： H04L12/56 ,  H04N7/173 ,  H04N21/2343 ,  H04N21/2381 ,  H04N21/24 ,  H04N21/2662 ,  H04N21/438 ,  H04N21/442 ,  H04N21/643 ,  H04N21/658 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00

CPC分类号： H04L47/822 ,  H04L47/15 ,  H04L47/193 ,  H04L47/2416 ,  H04L47/263 ,  H04L47/28 ,  H04L47/70 ,  H04L47/762 ,  H04L47/801 ,  H04N7/173 ,  H04N21/234318 ,  H04N21/234354 ,  H04N21/2381 ,  H04N21/2402 ,  H04N21/2662 ,  H04N21/4381 ,  H04N21/44209 ,  H04N21/64322 ,  H04N21/6582

摘要： A resource allocation of multiple compressed AV streams delivered over the Internet is disclosed that achieves end-to-end optimal quality through a multimedia streaming TCP-friendly transport (MSTFP) protocol that adaptively estimates the network bandwidth while smoothing the sending rate. Resources allocated dynamically according to a media encoding distortion and network degradation algorithm. A scheme is also disclosed for dynamically estimating the available network bandwidth for streaming of objects, such as MPEG4 multiple video objects, in conjunction with the MSTFP protocol. The scheme can account for packet-loss rates to minimize end-to-end distortion for media delivery.

摘要翻译： 公开了通过互联网传送的多个压缩AV流的资源分配，其通过自适应地估计网络带宽同时平滑发送速率的多媒体流TCP协议传输（MSTFP）协议来实现端到端的最佳质量。 根据媒体编码失真和网络退化算法动态分配资源。 还公开了一种结合MSTFP协议来动态地估计诸如MPEG4多视频对象的对象流的可用网络带宽的方案。 该方案可以解决丢包率，以尽量减少媒体传输的端到端失真。

公开(公告)号：US20050100040A1

公开(公告)日：2005-05-12

申请号：US10971519

申请日：2004-10-21

申请人： Zihua Guo ,  Wenwu Zhu ,  Qian Zhang ,  Jun Zhao

发明人： Zihua Guo ,  Wenwu Zhu ,  Qian Zhang ,  Jun Zhao

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04W28/18 ,  H04W28/24 ,  H04W74/00 ,  H04W74/08 ,  H04L12/413

CPC分类号： H04W74/0816 ,  H04W28/18 ,  H04W28/24 ,  H04W74/006 ,  H04W74/0833

摘要： A method provides differentiated quality of service (QoS) by providing adaptive updates to media access control (MAC) layer parameters on a distributed basis. The method includes calculating a failure probability for a transmission over the network, determining a target value for determining a contention window according to a mapped function of the failure probability, and altering the contention window according to a scaling function of the target value. The mapped function and the scaling can provide QoS differentiation. A wireless device ensures fairness in a wireless time slotted network and includes a network interface card (NIC), a network driver interface, a network monitor, a statistics engine, and an adaptive parameter engine for determining a target value for determining a contention window according to a mapped function of the one or more probabilities to enable an alteration of the contention window and provide new parameters for the MAC layer.

公开(公告)号：US20050060406A1

公开(公告)日：2005-03-17

申请号：US10662574

申请日：2003-09-15

申请人： Xin Zhang ,  Qian Zhang ,  Yongqiang Xiong ,  Wenwu Zhu

发明人： Xin Zhang ,  Qian Zhang ,  Yongqiang Xiong ,  Wenwu Zhu

IPC分类号： H04L12/28 ,  H04L12/24 ,  H04L12/26 ,  H04L12/56 ,  H04L29/08 ,  G06F15/173

CPC分类号： H04L67/104 ,  H04L41/0893 ,  H04L41/12 ,  H04L43/00 ,  H04L43/50 ,  H04L45/04 ,  H04L45/121 ,  H04L45/122 ,  H04L45/46 ,  H04L67/1046 ,  H04L67/1059 ,  H04L67/1072 ,  H04L69/329

摘要： Overlay network peers may be grouped so that each peer in a peer group has a similar transport network proximity measure with respect to the peers in other peer groups. A first set of transport network distances may include distances between a peer group and peer group neighbors of the peer group. A second set of distances may include distances between a peer and the peer group neighbors of the peer group. The peer may decide to join the peer group if the first set of distances is near to the second set. A first peer group may query a second peer group for the second peer group's neighboring peer groups. The distance between the first peer group and each of the second peer group's neighbors may be measured. Overlay network connections may be established between the first peer group and the closest of the second peer group's neighbors.

摘要翻译： 覆盖网络对等体可以被分组，使得对等体组中的每个对等体相对于其他对等体组中的对等体具有相似的传输网络邻近度量。 第一组传输网络距离可以包括对等体组和对等体组的对等体组邻居之间的距离。 第二组距离可以包括对等体组的对等体组邻居之间的距离。 如果第一组距离接近第二组，则对等体可以决定加入对等体组。 第一对等体组可以查询第二对等体组的第二对等体组的相邻对等体组。 可以测量第一对等组与每个第二对等组的邻居之间的距离。 覆盖网络连接可以在第一对等体组和第二对等体组的邻居中最接近之间建立。

公开(公告)号：US20220349681A1

公开(公告)日：2022-11-03

申请号：US17242774

申请日：2021-04-28

申请人： Chuanchao Zhang ,  Qian Zhang

发明人： Chuanchao Zhang ,  Qian Zhang

IPC分类号： F41J1/10

摘要： A collapsible target stand includes a base support assembly having a plurality of legs rotatable between an expanded position wherein the legs are radially arranged and an unexpanded position wherein the legs are disposed adjacent with each other; an upright support frame detachably connected with the base support assembly, the upright support frame including a first support frame connected to a second support frame and a third support frame connected to the second support frame; a locking assembly configured to lock the first support frame in an unfolded position; a target plate being detachable and suspended on the third support frame; wherein the first support frame is rotatable between a folded position wherein the first support frame has one side being coincident with the second support frame and the unfolded position wherein the first support frame is disposed in alignment with the second support frame.

公开(公告)号：US09569752B2

公开(公告)日：2017-02-14

申请号：US13435212

申请日：2012-03-30

申请人： Christopher Deering ,  Qian Zhang

发明人： Christopher Deering ,  Qian Zhang

IPC分类号： G06F15/16 ,  G06Q10/10 ,  H04L12/58

CPC分类号： G06Q10/107 ,  H04L51/04

摘要： A method, an apparatus and computer readable storage media facilitate initiating an actionable message at a computing device in response to input of a defined sequence of characters at the computing device, and executing an action associated with the initiated actionable message in accordance with information that is specific to the actionable message.

摘要翻译： 方法，装置和计算机可读存储介质有助于在计算设备响应于在计算设备处输入定义的字符序列而在计算设备处发起可动作消息，并根据信息是否执行与发起的可操作消息相关联的动作 具体针对可操作的消息。