公开(公告)号：US20130044598A1

公开(公告)日：2013-02-21

申请号：US13340354

申请日：2011-12-29

申请人： Yan Zhang ,  Nirwan Ansari ,  Mingquan Wu ,  Hong Heather Yu

发明人： Yan Zhang ,  Nirwan Ansari ,  Mingquan Wu ,  Hong Heather Yu

IPC分类号： H04L12/26 ,  H04L12/24

CPC分类号： H04L43/0882 ,  H04L43/16 ,  H04L47/193 ,  H04L47/27 ,  H04L47/283 ,  H04L47/29

摘要： An embodiment of a system and method that uses inline measurements to probe available bandwidth for a transmission control protocol, and adaptively sets a slow-start threshold according to the available bandwidth. The method includes initializing a congestion window “cwnd,” sending cwnd packets, estimating an available bandwidth for the cwnd packets. The congestion window cwnd is set to a higher number, and the higher number of further packets is sent if the available bandwidth is greater than a first threshold level. The available bandwidth is re-estimated for the higher number of the further packets, and a soft start threshold “ssthresh” is set to the re-estimated available bandwidth. A statistical measure is calculated for the re-estimated available bandwidth, and the congestion window cwnd is set equal to ssthresh if a ratio of the statistical measure to the re-estimated available bandwidth is less than a second threshold level.

摘要翻译： 使用在线测量来探测传输控制协议的可用带宽的系统和方法的实施例，并且根据可用带宽自适应地设置慢启动阈值。 该方法包括初始化拥塞窗口cwnd，发送cwnd分组，估计cwnd分组的可用带宽。 拥塞窗口cwnd被设置为更高的数量，并且如果可用带宽大于第一阈值水平，则发送更多数量的另外的分组。 对于更多数量的其他分组重新估计可用带宽，并且将软启动阈值ssthresh设置为重新估计的可用带宽。 对于重新估计的可用带宽计算统计度量，并且如果统计度量与重新估计的可用带宽的比率小于第二阈值水平，则将拥塞窗口cwnd设置为等于ssthresh。

公开(公告)号：US09178789B2

公开(公告)日：2015-11-03

申请号：US13340354

申请日：2011-12-29

申请人： Yan Zhang ,  Nirwan Ansari ,  Mingquan Wu ,  Hong Heather Yu

发明人： Yan Zhang ,  Nirwan Ansari ,  Mingquan Wu ,  Hong Heather Yu

IPC分类号： G01R31/08 ,  H04L12/26 ,  H04L12/807 ,  H04L12/801 ,  H04L12/841

CPC分类号： H04L43/0882 ,  H04L43/16 ,  H04L47/193 ,  H04L47/27 ,  H04L47/283 ,  H04L47/29

摘要： An embodiment of a system and method that uses inline measurements to probe available bandwidth for a transmission control protocol, and adaptively sets a slow-start threshold according to the available bandwidth. The method includes initializing a congestion window “cwnd,” sending cwnd packets, estimating an available bandwidth for the cwnd packets. The congestion window cwnd is set to a higher number, and the higher number of further packets is sent if the available bandwidth is greater than a first threshold level. The available bandwidth is re-estimated for the higher number of the further packets, and a soft start threshold “ssthresh” is set to the re-estimated available bandwidth. A statistical measure is calculated for the re-estimated available bandwidth, and the congestion window cwnd is set equal to ssthresh if a ratio of the statistical measure to the re-estimated available bandwidth is less than a second threshold level.

摘要翻译： 使用在线测量来探测传输控制协议的可用带宽的系统和方法的实施例，并且根据可用带宽自适应地设置慢启动阈值。 该方法包括初始化拥塞窗口“cwnd”，发送cwnd数据包，估计cwnd数据包的可用带宽。 拥塞窗口cwnd被设置为更高的数量，并且如果可用带宽大于第一阈值水平，则发送更多数量的另外的分组。 对于更多数量的另外的分组重新估计可用带宽，并且将软启动阈值“ssthresh”设置为重新估计的可用带宽。 对于重新估计的可用带宽计算统计度量，并且如果统计度量与重新估计的可用带宽的比率小于第二阈值水平，则将拥塞窗口cwnd设置为等于ssthresh。

公开(公告)号：US09456377B2

公开(公告)日：2016-09-27

申请号：US13340027

申请日：2011-12-29

申请人： Tao Han ,  Nirwan Ansari ,  Mingquan Wu ,  Hong Heather Yu

发明人： Tao Han ,  Nirwan Ansari ,  Mingquan Wu ,  Hong Heather Yu

IPC分类号： H04J1/16 ,  H04W28/02 ,  H04L12/807 ,  H04L12/835

CPC分类号： H04W28/0242 ,  H04L47/27 ,  H04L47/30

摘要： A method for delivering packets in a wireless communications system includes determining a cause of loss for a previously transmitted packet based on a packet acknowledgement corresponding to the previously transmitted packet, the packet acknowledgement including at least one of a wireless loss indicator and a congestion warning indicator for the wireless communications system. The method also includes adjusting a transmission parameter in a packet transmission protocol according to the cause of loss, and retransmitting the previously transmitted packet.

摘要翻译： 一种用于在无线通信系统中传送分组的方法包括基于与先前发送的分组相对应的分组确认来确定先前发送的分组的丢失的原因，分组确认包括无线丢失指示符和拥塞警告指示符中的至少一个 用于无线通信系统。 该方法还包括根据丢失的原因调整分组传输协议中的传输参数，并重传先前发送的分组。

公开(公告)号：US20130044595A1

公开(公告)日：2013-02-21

申请号：US13340027

申请日：2011-12-29

申请人： Tao Han ,  Nirwan Ansari ,  Mingquan Wu ,  Hong Heather Yu

发明人： Tao Han ,  Nirwan Ansari ,  Mingquan Wu ,  Hong Heather Yu

IPC分类号： H04W28/02 ,  H04W24/00

CPC分类号： H04W28/0242 ,  H04L47/27 ,  H04L47/30

摘要： A method for delivering packets in a wireless communications system includes determining a cause of loss for a previously transmitted packet based on a packet acknowledgement corresponding to the previously transmitted packet, the packet acknowledgement including at least one of a wireless loss indicator and a congestion warning indicator for the wireless communications system. The method also includes adjusting a transmission parameter in a packet transmission protocol according to the cause of loss, and retransmitting the previously transmitted packet.

摘要翻译： 一种用于在无线通信系统中传送分组的方法包括基于与先前发送的分组相对应的分组确认来确定先前发送的分组的丢失的原因，分组确认包括无线丢失指示符和拥塞警告指示符中的至少一个 用于无线通信系统。 该方法还包括根据丢失的原因调整分组传输协议中的传输参数，并重传先前发送的分组。

公开(公告)号：US09215666B2

公开(公告)日：2015-12-15

申请号：US13061663

申请日：2008-09-03

申请人： Hang Liu ,  Ishan Mandrekar ,  Mingquan Wu ,  Ramkumar Perumanam ,  Saurabh Mathur

发明人： Hang Liu ,  Ishan Mandrekar ,  Mingquan Wu ,  Ramkumar Perumanam ,  Saurabh Mathur

IPC分类号： H04W52/08 ,  H04W52/20 ,  H04W52/24

CPC分类号： H04W52/20 ,  H04W52/08 ,  H04W52/245

摘要： A method and apparatus are described including receiving, by a transmitter, a report from an associated client, setting and using a downlink transmit power level responsive to the report for data transmissions to the associated client, determining a downlink data loss rate and adjusting the downlink transmit power level responsive to the downlink data loss rate, wherein said report includes received signal strength, client transmit power level and one of link margin and receiver sensitivity. Also described are a method and apparatus including receiving, by a receiver, a request for a report, transmitting the requested report, receiving an instruction to use an uplink transmit power level, setting and using the uplink transmit power level, determining an uplink data loss rate and adjusting the uplink transmit power level responsive to the uplink data loss rate, wherein said report includes said received signal strength, client transmit power level and one of said link margin and said receiver sensitivity.

摘要翻译： 描述了一种方法和装置，包括由发射机从相关联的客户端接收报告，响应于所述报告来设置和使用下行链路发射功率电平，以便向相关联的客户端发送数据，确定下行链路数据丢失率并调整下行链路 响应于下行链路数据丢失率发送功率电平，其中所述报告包括接收信号强度，客户端发射功率电平以及链路余量和接收机灵敏度之一。 还描述了一种方法和装置，包括由接收机接收对报告的请求，发送所请求的报告，接收使用上行链路发射功率电平的指令，设置和使用上行链路发射功率电平，确定上行链路数据丢失 响应于上行链路数据丢失率来速率和调整上行链路发射功率电平，其中所述报告包括所述接收信号强度，客户端发射功率电平以及所述链路余量和所述接收机灵敏度之一。

公开(公告)号：US08989080B2

公开(公告)日：2015-03-24

申请号：US13811293

申请日：2010-07-27

申请人： Hang Liu ,  Sha Hua ,  Mingquan Wu ,  Jun Li

发明人： Hang Liu ,  Sha Hua ,  Mingquan Wu ,  Jun Li

IPC分类号： H04W16/14 ,  H04B7/02 ,  H04B7/155 ,  H04B7/26 ,  H04W84/04

CPC分类号： H04W16/14 ,  H04B7/024 ,  H04B7/15542 ,  H04B7/2656 ,  H04W84/047

摘要： A method and apparatus are described including competing by a secondary transmitter with a plurality of secondary nodes in a cognitive radio network to become a relay node for a primary transmitter, the secondary nodes being secondary transmitters and secondary receivers, receiving data transmitted by the primary transmitter in a first time slot if the secondary transmitter was successful in the competition, relaying the received data transmitted by the primary transmitter to a primary receiver in a second time slot, transmitting secondary data to a corresponding secondary receiver in a subslot of the second time slot and transmitting the secondary data to the corresponding secondary receiver in a subslot of the first time slot if the secondary transmitter was not successful in the competition and if the corresponding secondary receiver was successful in the competition.

摘要翻译： 描述了一种方法和装置，包括由认知无线电网络中的多个辅助节点与辅助发射机竞争成为主发射机的中继节点，次要节点是次要发射机和次要接收机，接收由主发射机发射的数据 在第一时隙中，如果次要发射机在比赛中成功，则在第二时隙中将由主发射机发送的接收数据中继到主接收机，在第二时隙的子时隙中将辅助数据发送到对应的辅助接收机 以及如果次要发射机在比赛中不成功，并且相应的次要接收机在比赛中是否成功，则在第一时隙的子时隙中将辅助数据发送到相应的辅助接收机。

公开(公告)号：US08792515B2

公开(公告)日：2014-07-29

申请号：US13138528

申请日：2009-03-05

申请人： Mingquan Wu ,  Hang Liu ,  Saurabh Mathur ,  Kagan Bakanoglu

发明人： Mingquan Wu ,  Hang Liu ,  Saurabh Mathur ,  Kagan Bakanoglu

IPC分类号： H04J3/26

CPC分类号： H04L5/0037 ,  H04L5/0046 ,  H04L5/0064

摘要： A method and apparatus are described including allocating one of a plurality of sub-channels to one of a plurality of multicast group clients for a multicast session and performing bit-loading for the allocated sub-channel, wherein said performing act further includes finding one of the plurality of multicast group clients having a lowest received bit rate, finding one of the plurality of sub-channels needing a lowest power to transmit one more bit to the one of the plurality of multicast group clients having the lowest received bit rate, comparing the needed power to a residual power, adding one more transmission bit to the sub-channel if the needed power is not greater than the residual power and updating a multicast rate, the residual power and the power need to transmit one more bit if the needed power is not greater than the residual power.

摘要翻译： 描述了一种方法和装置，包括将多个子信道中的一个分配给组播会话的多个多播组客户端之一，并为所分配的子信道执行比特加载，其中所述执行动作还包括找到 所述多个组播组客户端具有最低的接收比特率，发现所述多个子信道中的一个需要最低功率以向所述多个具有最低接收比特率的多播组客户端中的一个发送多个比特， 需要剩余电力的功率，如果所需功率不大于剩余功率并且更新多播速率，则在子信道上再增加一个传输比特，如果所需功率需要剩余功率和功率需要再传输一个比特 不大于剩余功率。

公开(公告)号：US08732559B2

公开(公告)日：2014-05-20

申请号：US12309507

申请日：2006-07-25

申请人： Hang Liu ,  Liqiao Han ,  Mingquan Wu ,  Dekai Li ,  Kumar Ramaswamy

发明人： Hang Liu ,  Liqiao Han ,  Mingquan Wu ,  Dekai Li ,  Kumar Ramaswamy

IPC分类号： H03M13/00

CPC分类号： H04L1/0042 ,  H03M13/05 ,  H03M13/154 ,  H03M13/6312 ,  H03M13/6527 ,  H04L1/0031 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0047 ,  H04L1/0057 ,  H04L1/0075 ,  H04L1/0079 ,  H04L1/008 ,  H04L1/0083 ,  H04L12/18 ,  H04L65/4076 ,  H04N19/164 ,  H04N19/61 ,  H04N19/89 ,  H04N21/2381 ,  H04N21/26275 ,  H04N21/41407 ,  H04N21/4382 ,  H04N21/4425 ,  H04N21/6437 ,  H04W80/04

摘要： A method and system for transmitting data are described including packetizing the data, performing forward error correction (FEC) encoding on the packetized data in order to generate a parity packet, appending FEC information as padding to the end of payload data of the packetized data and transmitting the packetized data and the at least one parity packet. Also described are a method and system for recovering from loss of a packet including receiving a data packet, receiving a parity packet, buffering the received data packet, detecting packet loss, forward error correction decoding the parity packet to recover from packet loss using forward error correction information extracted from the data packet and from the parity packet and forwarding the recovered packet via an internal socket. Also described is a method for staggercasting.

摘要翻译： 描述了用于发送数据的方法和系统，包括对数据进行打包，对分组化数据执行前向纠错（FEC）编码，以便生成奇偶分组，将FEC信息作为填充附加到分组化数据的有效载荷数据的末尾; 发送分组化数据和至少一个奇偶校验分组。 还描述了一种用于从数据包丢失中恢复的方法和系统，包括接收数据分组，接收奇偶分组，缓冲接收到的数据分组，检测分组丢失，前向纠错解码奇偶分组，以使用前向误差从分组丢失中恢复 从数据分组和奇偶分组提取的修正信息，并通过内部套接字转发恢复的分组。 还描述了一种交错广播的方法。

公开(公告)号：US20110317607A1

公开(公告)日：2011-12-29

申请号：US13138530

申请日：2009-03-05

申请人： Mingquan Wu ,  Hang Liu ,  Saurabh Mathur ,  Kagan Bakanoglu

发明人： Mingquan Wu ,  Hang Liu ,  Saurabh Mathur ,  Kagan Bakanoglu

IPC分类号： H04H20/71 ,  H04W72/04

CPC分类号： H04L47/806 ,  H04L5/0037 ,  H04L5/0046 ,  H04L5/0064 ,  H04L12/1881 ,  H04L47/15 ,  H04L65/4076

摘要： A method and apparatus are described including assigning sub-channels to different multicast sessions under the assumption that in each session all sub-channels are allocated to all users of that session and power is equally allocated to each sub-channel, then for each session assigning the sub-channels to the users of that session under the assumption that the same amount of power is allocated to each sub-channel, then allocating remaining power to certain sub-channels within the session to increase multicast rate, finally modifying the sub-channel allocations among the multicast sessions depending on the sub-channel and power allocation within each multicast session.

摘要翻译： 描述了一种方法和装置，其包括将子信道分配给不同的多播会话，假设在每个会话中，所有子信道被分配给该会话的所有用户，并且功率被均等地分配给每个子信道，则对于每个会话分配 在对每个子信道分配相同数量的功率的前提下，向该用户的用户分配子信道，然后向会话内的某些子信道分配剩余电力以增加组播速率，最后修改子信道 根据每个多播会话中的子信道和功率分配，多播会话之间的分配。

公开(公告)号：US20100260180A1

公开(公告)日：2010-10-14

申请号：US12739235

申请日：2007-10-23

申请人： Mingquan Wu ,  Hang Liu

发明人： Mingquan Wu ,  Hang Liu

IPC分类号： H04L12/56

CPC分类号： H04L1/1819 ,  H04L1/0057 ,  H04L2001/0093

摘要： A method and apparatus are described for increasing multicasting reliability, including receiving content and a first layer of a plurality of a forward error correction coded packets from a first multicast group and joining an additional multicast group in order to receive one of additional layers of forward error correction coded packets and the content along with a further additional layer of the plurality of forward error correction coded packets.

摘要翻译： 描述了一种用于增加多播可靠性的方法和装置，包括从第一多播组接收多个前向纠错编码分组的内容和第一层，并加入附加多播组，以便接收另外的前向错误层 校正编码分组和内容以及多个前向纠错编码分组的另外的附加层。