公开(公告)号：US08611271B2

公开(公告)日：2013-12-17

申请号：US12938101

申请日：2010-11-02

申请人： Elza Erkip ,  Pei Liu ,  Chun Nie ,  Shivendra S. Panwar

发明人： Elza Erkip ,  Pei Liu ,  Chun Nie ,  Shivendra S. Panwar

IPC分类号： H03C7/00

CPC分类号： H04B7/15592 ,  H04B7/026 ,  H04W74/08 ,  H04W88/04

摘要： A distributed and opportunistic medium access control (MAC) layer protocol for randomized distributed space-time coding (R-DSTC), which may be deployed in an IEEE 802.11 wireless local area network (WLAN), is described. Unlike other cooperative MAC designs, there is no need to predetermine, before packet transmission, which stations will serve as relays. Instead, the MAC layer protocol opportunistically recruits relay stations on the fly. Network capacity and delay performance is much better than legacy IEEE 802.11g network, and even cooperative forwarding using one relay station. Avoiding the need to collect the station-to-station channel statistics considerably reduces overhead otherwise required for channel measurement and signaling.

摘要翻译： 描述了可以部署在IEEE 802.11无线局域网（WLAN）中的用于随机分布时空编码（R-DSTC）的分布式和机会性介质访问控制（MAC）层协议。 与其他合作MAC设计不同，在分组传输之前，不需要预先确定哪些站将用作中继站。 相反，MAC层协议机会地即时招募中继站。 网络容量和延迟性能远优于传统IEEE 802.11g网络，甚至使用一个中继站进行协作转发。 避免收集站对站信道统计的需要大大减少了信道测量和信令所需的开销。

公开(公告)号：US20110216662A1

公开(公告)日：2011-09-08

申请号：US13010951

申请日：2011-01-21

申请人： Chun Nie ,  Pei Liu ,  Thanasis Korakis ,  Elza Erkip ,  Shivendra S. Panwar

发明人： Chun Nie ,  Pei Liu ,  Thanasis Korakis ,  Elza Erkip ,  Shivendra S. Panwar

IPC分类号： H04W24/00

CPC分类号： H04W24/00 ,  H04B7/15592

摘要： Cooperative communication is a technique that can be employed to meet the increased throughput needs of next generation WiMAX systems. In a cooperative scenario, multiple stations can jointly emulate the antenna elements of a multi-input multi-output system in a distributed fashion. A framework for a randomized distributed space-time coding (“R-DSTC”) technique in the emerging relay-assisted WiMAX network, and the development of a cooperative medium access control (“MAC”) layer protocol, called CoopMAX, for R-DSTC deployment in an IEEE 802.16 system, is described. The technique described couples the MAC layer with the physical (PHY) layer for performance optimization. The PHY layer yields significant diversity gain, while the MAC layer achieves a substantial end-to-end throughput gain.

摘要翻译： 合作通信是可以用于满足下一代WiMAX系统增加的吞吐量需求的技术。 在合作方案中，多个站可以以分布的方式共同模拟多输入多输出系统的天线元件。 在新兴的中继辅助WiMAX网络中的随机分布式空时编码（“R-DSTC”）技术的框架，以及称为CoopMAX的协作媒体接入控制（“MAC”）层协议的开发，用于R- 描述了IEEE 802.16系统中的DSTC部署。 所描述的技术将MAC层与物理（PHY）层耦合以进行性能优化。 PHY层产生显着的分集增益，而MAC层实现了大量的端到端吞吐量增益。

公开(公告)号：US20110110290A1

公开(公告)日：2011-05-12

申请号：US12938101

申请日：2010-11-02

申请人： Elza Erkip ,  Pei Liu ,  Chun Nie ,  Shivendra S. Panwar

发明人： Elza Erkip ,  Pei Liu ,  Chun Nie ,  Shivendra S. Panwar

IPC分类号： H04W84/02

CPC分类号： H04B7/15592 ,  H04B7/026 ,  H04W74/08 ,  H04W88/04

摘要： A distributed and opportunistic medium access control (MAC) layer protocol for randomized distributed space-time coding (R-DSTC), which may be deployed in an IEEE 802.11 wireless local area network (WLAN), is described. Unlike other cooperative MAC designs, there is no need to predetermine, before packet transmission, which stations will serve as relays. Instead, the MAC layer protocol opportunistically recruits relay stations on the fly. Network capacity and delay performance is much better than legacy IEEE 802.11g network, and even cooperative forwarding using one relay station. Avoiding the need to collect the station-to-station channel statistics considerably reduces overhead otherwise required for channel measurement and signaling.

摘要翻译： 描述了可以部署在IEEE 802.11无线局域网（WLAN）中的用于随机分布时空编码（R-DSTC）的分布式和机会性介质访问控制（MAC）层协议。 与其他合作MAC设计不同，在分组传输之前，不需要预先确定哪些站将用作中继站。 相反，MAC层协议机会地即时招募中继站。 网络容量和延迟性能远优于传统IEEE 802.11g网络，甚至使用一个中继站进行协作转发。 避免收集站对站信道统计的需要大大减少了信道测量和信令所需的开销。

公开(公告)号：US08792367B2

公开(公告)日：2014-07-29

申请号：US13010951

申请日：2011-01-21

申请人： Chun Nie ,  Pei Liu ,  Thanasis Korakis ,  Elza Erkip ,  Shivendra S. Panwar

发明人： Chun Nie ,  Pei Liu ,  Thanasis Korakis ,  Elza Erkip ,  Shivendra S. Panwar

IPC分类号： H04W24/00

CPC分类号： H04W24/00 ,  H04B7/15592

摘要： Cooperative communication is a technique that can be employed to meet the increased throughput needs of next generation WiMAX systems. In a cooperative scenario, multiple stations can jointly emulate the antenna elements of a multi-input multi-output system in a distributed fashion. A framework for a randomized distributed space-time coding (“R-DSTC”) technique in the emerging relay-assisted WiMAX network, and the development of a cooperative medium access control (“MAC”) layer protocol, called CoopMAX, for R-DSTC deployment in an IEEE 802.16 system, is described. The technique described couples the MAC layer with the physical (PHY) layer for performance optimization. The PHY layer yields significant diversity gain, while the MAC layer achieves a substantial end-to-end throughput gain.

摘要翻译： 合作通信是可以用于满足下一代WiMAX系统增加的吞吐量需求的技术。 在合作方案中，多个站可以以分布的方式共同模拟多输入多输出系统的天线元件。 在新兴的中继辅助WiMAX网络中的随机分布式空时编码（“R-DSTC”）技术的框架，以及称为CoopMAX的协作媒体接入控制（“MAC”）层协议的开发，用于R- 描述了IEEE 802.16系统中的DSTC部署。 所描述的技术将MAC层与物理（PHY）层耦合以进行性能优化。 PHY层产生显着的分集增益，而MAC层实现了大量的端到端吞吐量增益。

公开(公告)号：US20070119648A1

公开(公告)日：2007-05-31

申请号：US11598665

申请日：2006-11-14

申请人： Tadashi Udo ,  Chun Nie

发明人： Tadashi Udo ,  Chun Nie

IPC分类号： B60K17/16 ,  B60K17/24 ,  B62D21/00

CPC分类号： B62D21/00 ,  B62D21/04 ,  B62D29/041

摘要： Generally triangular first and second longitudinal side portions are arranged in the lower half region of a longitudinal side member between the first and second flat members vertically spaced apart from each other and form projections and depressions longitudinally and alternately. Generally inverted triangular third and fourth longitudinal side portions are arranged in the upper half region between the first and second flat members and form projections and depressions longitudinally and alternately. The first longitudinal side portions are vertically opposed to the third longitudinal side portions such that the first and third longitudinal side portions form projections and depressions. The second longitudinal side portions are vertically opposed to the fourth longitudinal side portions such that the second and fourth longitudinal side portions form projections and depressions. The first through fourth longitudinal side portions are integrally coupled through associated rhombic connecting ribs located midway between the first and second flat members.

摘要翻译： 通常，三角形的第一和第二纵向侧部分布置在垂直彼此间隔开的第一和第二平坦部件之间的纵向侧部件的下半部分中，并且纵向和交替地形成凹凸。 通常，倒三角形的第三和第四纵向侧部布置在第一和第二平坦部件之间的上半部区域中，并且纵向和交替地形成凹凸。 第一纵向侧部与第三纵向侧部垂直相对，使得第一和第三纵向侧部形成凹凸。 第二纵向侧部与第四纵向侧部垂直相对，使得第二纵向侧部和第四纵向侧部形成凹凸。 第一至第四纵向侧部通过位于第一和第二平坦部件之间的中间的相关联的菱形连接肋整体联接。

公开(公告)号：US20090016312A1

公开(公告)日：2009-01-15

申请号：US11777356

申请日：2007-07-13

申请人： Zhifeng Tao ,  Chun Nie ,  Neelesh B. Mehta ,  Andreas F. Molisch ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Chun Nie ,  Neelesh B. Mehta ,  Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04B7/208

CPC分类号： H04B7/0628 ,  H04B7/0404 ,  H04B7/0413 ,  H04B7/0691 ,  H04B7/0874 ,  H04B7/0888 ,  H04B17/309

摘要： A method selects antennas in an OFDMA network. A channel state of a downlink is measured using a downlink subframe received in a mobile station from a base station. A channel state of an uplink is measured using an uplink subframe received in the base station from the mobile station. Next, the method compares the channel states to determine whether the downlink and the uplink are reciprocal or not. The mobile station can perform receive antenna selection based on the quality of the downlink channel state. The mobile station can also perform transmit antenna selection when instructed by the base station.

摘要翻译： 一种方法选择OFDMA网络中的天线。 使用从基站在移动台中接收的下行链路子帧来测量下行链路的信道状态。 使用从移动站在基站中接收的上行链路子帧来测量上行链路的信道状态。 接下来，该方法比较信道状态以确定下行链路和上行链路是否是倒数的。 移动台可以基于下行链路信道状态的质量来执行接收天线选择。 当基站指示时，移动站也可以执行发射天线选择。

公开(公告)号：US20080151789A1

公开(公告)日：2008-06-26

申请号：US11644469

申请日：2006-12-21

申请人： Muthaiah Venkatachalam ,  Chun Nie ,  Xiangying Yang

发明人： Muthaiah Venkatachalam ,  Chun Nie ,  Xiangying Yang

IPC分类号： H04J3/00

CPC分类号： H04W74/06

摘要： Various embodiments of the invention may use adaptive polling in a wireless network when one or more consecutive polls show that the polled station has no data to transmit. When triggered to perform adaptive polling, a base station may wait for increasingly long intervals between polls to a particular subscriber station, until some maximum interval has been reached. In some embodiments, the intervals may increase exponentially.

摘要翻译： 当一个或多个连续轮询显示轮询站没有要发送的数据时，本发明的各种实施例可以在无线网络中使用自适应轮询。 当触发执行自适应轮询时，基站可以等待到特定用户台的轮询之间的更长的间隔，直到达到一些最大间隔。 在一些实施例中，间隔可以指数地增加。

公开(公告)号：US08780881B2

公开(公告)日：2014-07-15

申请号：US11644469

申请日：2006-12-21

申请人： Muthaiah Venkatachalam ,  Chun Nie ,  Xiangying Yang

发明人： Muthaiah Venkatachalam ,  Chun Nie ,  Xiangying Yang

IPC分类号： H04J3/16

CPC分类号： H04W74/06

摘要： Various embodiments of the invention may use adaptive polling in a wireless network when one or more consecutive polls show that the polled station has no data to transmit. When triggered to perform adaptive polling, a base station may wait for increasingly long intervals between polls to a particular subscriber station, until some maximum interval has been reached. In some embodiments, the intervals may increase exponentially.

摘要翻译： 当一个或多个连续轮询显示轮询站没有要发送的数据时，本发明的各种实施例可以在无线网络中使用自适应轮询。 当触发执行自适应轮询时，基站可以等待到特定用户台的轮询之间的更长的间隔，直到达到某个最大间隔。 在一些实施例中，间隔可以指数地增加。

公开(公告)号：US07756099B2

公开(公告)日：2010-07-13

申请号：US11777356

申请日：2007-07-13

申请人： Zhifeng Tao ,  Chun Nie ,  Neelesh B. Mehta ,  Andreas F. Molisch ,  Jinyun Zhang

发明人： Zhifeng Tao ,  Chun Nie ,  Neelesh B. Mehta ,  Andreas F. Molisch ,  Jinyun Zhang

IPC分类号： H04B7/208

CPC分类号： H04B7/0628 ,  H04B7/0404 ,  H04B7/0413 ,  H04B7/0691 ,  H04B7/0874 ,  H04B7/0888 ,  H04B17/309

摘要： A method selects antennas in an OFDMA network. A channel state of a downlink is measured using a downlink subframe received in a mobile station from a base station. A channel state of an uplink is measured using an uplink subframe received in the base station from the mobile station. Next, the method compares the channel states to determine whether the downlink and the uplink are reciprocal or not. The mobile station can perform receive antenna selection based on the quality of the downlink channel state. The mobile station can also perform transmit antenna selection when instructed by the base station.

摘要翻译： 一种方法选择OFDMA网络中的天线。 使用从基站在移动台中接收的下行链路子帧来测量下行链路的信道状态。 使用从移动站在基站中接收的上行链路子帧来测量上行链路的信道状态。 接下来，该方法比较信道状态以确定下行链路和上行链路是否是倒数的。 移动台可以基于下行链路信道状态的质量来执行接收天线选择。 当基站指示时，移动站也可以执行发射天线选择。