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：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：US08228836B2

公开(公告)日：2012-07-24

申请号：US12479563

申请日：2009-06-05

申请人： Elza Erkip ,  Thanasis Korakis ,  Pei Liu ,  Shivendra S. Panwar ,  Anna Scaglione

发明人： Elza Erkip ,  Thanasis Korakis ,  Pei Liu ,  Shivendra S. Panwar ,  Anna Scaglione

IPC分类号： H04B7/14

CPC分类号： H04B7/2606 ,  H04B7/026 ,  H04B7/15592 ,  H04L1/0003 ,  H04L1/0625 ,  H04L5/0023 ,  H04L2001/0097

摘要： Data is transmitted from a source wireless device to a destination wireless device by: (a) discovering node-to-node wireless channel conditions in a wireless network; (b) determining at least one of (A) wireless relay devices, (B) modulation schemes, and (C) transmission rates using the discovered node-to-node channel conditions; (c) signaling at least some of the determined information to the determined wireless relay devices; (d) receiving, with each of the wireless relay devices, a transmission of the data from the source wireless device; and (e) transmitting, with each of the wireless relay devices, a randomized, space-time encoded, part of the received data, to the destination device using the signaled at least some of the determined information.

摘要翻译： 数据通过以下方式从源无​​线设备发送到目标无线设备：（a）发现无线网络中的节点到节点无线信道条件; （b）使用所发现的节点到节点信道条件确定（A）无线中继设备，（B）调制方案和（C）传输速率中的至少一个; （c）将确定的信息中的至少一些信令发送到所确定的无线中继设备; （d）与所述无线中继设备中的每一个接收来自所述源无线设备的数据的传输; 以及（e）使用所述信号化的至少一些所确定的信息，将与所述无线中继设备中的每一个一起的随机，时空编码的所接收的数据的一部分发送到所述目的地设备。

公开(公告)号：US08509288B2

公开(公告)日：2013-08-13

申请号：US12478687

申请日：2009-06-04

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

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

IPC分类号： H04B3/36

CPC分类号： H04L25/20 ,  H04B7/15592 ,  H04L2025/03426

摘要： Multiple cooperative relays operate in a highly mobile environment and form a virtual antenna array. Multiple independent streams of data can be simultaneously, transmitted in parallel to the destination receiver. Thus a higher spatial multiplexing gain can be obtained. Each relay device that receives the information without errors splits it into multiple streams. For example, if the relay devices receive B symbols and the number of streams is K, each stream contains B/K symbols. Each relay device then generates a random linear combination of all the streams and transmits this output simultaneously with the other relay devices.

摘要翻译： 多个协作继电器在高度移动的环境中工作并形成虚拟天线阵列。 多个独立的数据流可以同时并行发送到目的地接收机。 因此，可以获得更高的空间复用增益。 接收信息而没有错误的每个中继设备将其分成多个流。 例如，如果中继设备接收到B符号并且流的数量是K，则每个流包含B / K个符号。 然后，每个中继设备产生所有流的随机线性组合，并与其他中继设备同时发送该输出。

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：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：US20100014453A1

公开(公告)日：2010-01-21

申请号：US12479563

申请日：2009-06-05

申请人： Elza Erkip ,  Thnnasis Korakis ,  Pei Liu ,  Shivendra S. Panwar ,  Anna Scaglione

发明人： Elza Erkip ,  Thnnasis Korakis ,  Pei Liu ,  Shivendra S. Panwar ,  Anna Scaglione

IPC分类号： H04B7/14

CPC分类号： H04B7/2606 ,  H04B7/026 ,  H04B7/15592 ,  H04L1/0003 ,  H04L1/0625 ,  H04L5/0023 ,  H04L2001/0097

摘要： Data is transmitted from a source wireless device to a destination wireless device by: (a) discovering node-to-node wireless channel conditions in a wireless network; (b) determining at least one of (A) wireless relay devices, (B) modulation schemes, and (C) transmission rates using the discovered node-to-node channel conditions; (c) signaling at least some of the determined information to the determined wireless relay devices; (d) receiving, with each of the wireless relay devices, a transmission of the data from the source wireless device; and (e) transmitting, with each of the wireless relay devices, a randomized, space-time encoded, part of the received data, to the destination device using the signaled at least some of the determined information

摘要翻译： 数据通过以下方式从源无​​线设备发送到目标无线设备：（a）发现无线网络中的节点到节点无线信道条件; （b）使用所发现的节点到节点信道条件确定（A）无线中继设备，（B）调制方案和（C）传输速率中的至少一个; （c）将确定的信息中的至少一些信令发送到所确定的无线中继设备; （d）与所述无线中继设备中的每一个接收来自所述源无线设备的数据的传输; 以及（e）使用所述信号的所确定的信息中的至少一些信息将与所述无线中继设备中的每一个一起的随机，时空编码的所接收的数据的一部分发送到所述目的地设备

公开(公告)号：US20090316763A1

公开(公告)日：2009-12-24

申请号：US12478687

申请日：2009-06-04

申请人： Elza Erkip ,  Thanasic Korakis ,  Pei Liu ,  Shivendra S. Panwar

发明人： Elza Erkip ,  Thanasic Korakis ,  Pei Liu ,  Shivendra S. Panwar

IPC分类号： H04L25/20

CPC分类号： H04L25/20 ,  H04B7/15592 ,  H04L2025/03426

摘要： Multiple cooperative relays operate in a highly mobile environment and form a virtual antenna array. Multiple independent streams of data can be simultaneously transmitted in parallel to the destination receiver. Thus a higher spatial multiplexing gain can be obtained. Such exemplary embodiments might do so by allowing each relay to transmit a linear combination of antenna waveforms according to an independently and randomly generated coefficient vector. This randomized cooperation scheme may be useful in an environment in which a group of relay devices are close to the source device, and can therefore receive information at a high rate. Each relay device that receives the information without errors splits it into multiple streams. For example, if the relay devices receive B symbols and the number of streams is K, each stream contains B/K symbols. Each relay device then generates a random linear combination of all the streams and transmits this output simultaneously with the other relay devices.

摘要翻译： 多个协作继电器在高度移动的环境中工作并形成虚拟天线阵列。 可以将多个独立的数据流并行发送到目的地接收机。 因此，可以获得更高的空间复用增益。 这样的示例性实施例可以通过允许每个继电器根据独立且随机生成的系数向量来发送天线波形的线性组合来实现。 这种随机化协作方案在一组中继设备靠近源设备的环境中可能是有用的，因此可以以高速率接收信息。 接收信息而没有错误的每个中继设备将其分成多个流。 例如，如果中继设备接收到B符号并且流的数量是K，则每个流包含B / K个符号。 然后，每个中继设备产生所有流的随机线性组合，并与其他中继设备同时发送该输出。

公开(公告)号：US20080285480A1

公开(公告)日：2008-11-20

申请号：US11937823

申请日：2007-11-09

申请人： Shivendra S. Panwar ,  Pei Liu ,  Zhifeng Tao

发明人： Shivendra S. Panwar ,  Pei Liu ,  Zhifeng Tao

IPC分类号： H04L12/26

CPC分类号： H04W40/00 ,  H04L45/121 ,  H04W84/18

摘要： When it is advantageous to do so, a wireless LAN station sends data packets to a destination station via an intermediate station, instead of to the destination station directly. That is, the intermediate station, which serves as a helper to the source, forwards packets received from the source station to the intended destination station. This cooperative data transmission approach can result in system performance improvement, as long as the total time consumed by two-hop transmission (i.e., transmission via the helper station) is less than direct transmission. Such a determination may be made using rate information stored at each station. Specifically, using the rate information, signaling needed to set up a transmission, the amount of data to be transmitted, etc., transmitting the data directly and via a help station may be compared.

摘要翻译： 当这样做有利时，无线LAN站经由中间站将数据分组发送到目的站，而不是直接发送到目的站。 也就是说，作为来源的帮助者的中间站将从源站接收的分组转发到预定的目的地站。 只要通过两跳传输（即经由辅助站的传输）消耗的总时间小于直接传输，该协作数据传输方法可以导致系统性能改善。 可以使用存储在每个站处的速率信息来进行这样的确定。 具体地，可以比较速率信息，建立传输所需的信令，要发送的数据量等，直接和经由帮助台发送数据。

公开(公告)号：US08175003B2

公开(公告)日：2012-05-08

申请号：US11937823

申请日：2007-11-09

申请人： Shivendra S. Panwar ,  Pei Liu ,  Zhifeng Tao

发明人： Shivendra S. Panwar ,  Pei Liu ,  Zhifeng Tao

IPC分类号： H04L12/28

CPC分类号： H04W40/00 ,  H04L45/121 ,  H04W84/18

摘要： When it is advantageous to do so, a wireless LAN station sends data packets to a destination station via an intermediate station, instead of to the destination station directly. That is, the intermediate station, which serves as a helper to the source, forwards packets received from the source station to the intended destination station. This cooperative data transmission approach can result in system performance improvement, as long as the total time consumed by two-hop transmission (i.e., transmission via the helper station) is less than direct transmission. Such a determination may be made using rate information stored at each station. Specifically, using the rate information, signaling needed to set up a transmission, the amount of data to be transmitted, etc., transmitting the data directly and via a help station may be compared.

摘要翻译： 当这样做有利时，无线LAN站经由中间站将数据分组发送到目的站，而不是直接发送到目的站。 也就是说，作为来源的帮助者的中间站将从源站接收的分组转发到预定的目的地站。 只要通过两跳传输（即经由辅助站的传输）消耗的总时间小于直接传输，该协作数据传输方法可以导致系统性能改善。 可以使用存储在每个站处的速率信息来进行这样的确定。 具体地，可以比较速率信息，建立传输所需的信令，要发送的数据量等，直接和经由帮助台发送数据。