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：US08179848B2

公开(公告)日：2012-05-15

申请号：US12327554

申请日：2008-12-03

申请人： Ozgu Alay ,  Elza Erkip ,  Thanasis Korakis ,  Shivendra S. Panwar ,  Yao Wang

发明人： Ozgu Alay ,  Elza Erkip ,  Thanasis Korakis ,  Shivendra S. Panwar ,  Yao Wang

IPC分类号： H04W4/00

CPC分类号： H04B5/02 ,  H04B5/0031 ,  H04B5/0062

摘要： Improved distribution of video information in an infrastructure-based wireless network is provided. A wireless channel condition between the video server node and each of the plurality of receiver nodes is determined. Receiver nodes are assigned into one of a first group and a second group using the measured wireless channel conditions, wherein receiver nodes assigned to the first group have, on average, a better measured wireless channel condition than that of receiver nodes assigned to the second group. At least some of the receiver nodes of the first group of nodes are selected to serve as relay nodes. Video information is then transmitted wirelessly from the video server node to the receiver nodes assigned to the first group. Each of the selected relay nodes then transmits at least a part of the video information to the receiver nodes of the second group.

摘要翻译： 提供了在基于基础设施的无线网络中改进视频信息的分发。 确定视频服务器节点和多个接收机节点中的每一个之间的无线信道条件。 接收机节点使用测量的无线信道条件被分配到第一组和第二组中的一个，其中分配给第一组的接收机节点平均比经分配给第二组的接收机节点的平均更好的测量无线信道条件 。 选择第一组节点的至少一些接收器节点用作中继节点。 然后，视频信息从视频服务器节点无线地传送到分配给第一组的接收机节点。 所选择的中继节点中的每一个然后将至少一部分视频信息发送到第二组的接收机节点。

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：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：US08451768B2

公开(公告)日：2013-05-28

申请号：US11993632

申请日：2006-06-27

申请人： Zinan Lin ,  Monisha Ghosh ,  Elza Erkip

发明人： Zinan Lin ,  Monisha Ghosh ,  Elza Erkip

IPC分类号： H04B7/14

CPC分类号： H04L27/0008 ,  H04B7/15592 ,  H04L1/0003 ,  H04L1/18 ,  H04L2001/0097 ,  Y02D50/10

摘要： A system, method, and apparatus are provided for a source to choose a partner/relay from at least one candidate to transmit at least part of a message from the source to destination. The choice depends on the channel conditions of the source and when the source is experiencing poor channel quality to the destination, the source selects the candidate and the modulation modes of the source and partner/relay such that the frame error rate (FER) of the source is lowered. Otherwise, a modulation mode is selected for each of the source and the partner/relay that most improves the gain in throughput of the source. The present invention applies to modes consisting of binary phase shift keying (BPSK), quadrature phase shift keying (QPSK), and 16-state quadrature amplitude modulation (16-QAM).

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：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：US20090147746A1

公开(公告)日：2009-06-11

申请号：US12327554

申请日：2008-12-03

申请人： Ozgu ALAY ,  Elza Erkip ,  Thanasis Korakis ,  Shivendra S. Panwar ,  Yao Wang

发明人： Ozgu ALAY ,  Elza Erkip ,  Thanasis Korakis ,  Shivendra S. Panwar ,  Yao Wang

IPC分类号： H04W4/00 ,  H04N7/173

CPC分类号： H04B5/02 ,  H04B5/0031 ,  H04B5/0062

摘要： Improved distribution of video information in an infrastructure-based wireless network is provided. A wireless channel condition between the video server node and each of the plurality of receiver nodes is measured (or accepted, or otherwise determined). Each of the plurality of receiver nodes are assigned into one of a first group and a second group using the measured wireless channel conditions, wherein receiver nodes assigned to the first group have, on average (e.g., on average over time), a better measured wireless channel condition than that of receiver nodes assigned to the second group. At least some (e.g., one or more) of the receiver nodes of the first group of nodes are selected to serve as relay nodes. Video information (e.g., N layers) is then transmitted wirelessly from the video server node for reception by each of the receiver nodes assigned to the first group. Each of the selected relay nodes then transmit at least a part (e.g., M≦N layers) of the video information for reception by at least some of the receiver nodes of the second group such that the relay nodes collectively transmit the at least a part of the video information to all of the receiver nodes of the second group. Receiver nodes assigned to the first group receive, decode and render the received video information. Similarly, receiver nodes assigned to the second group, receive, decode and render the received at least a part of the video information. The receiver nodes assigned to the second group may also use the (1) video information transmitted wirelessly by the source node and/or (2) copies of the at least a part of the video information transmitted by other relay nodes (that is, relay nodes not assigned to it), to the extent such information is received.

摘要翻译： 提供了在基于基础设施的无线网络中改进视频信息的分发。 测量（或接受或以其他方式确定）视频服务器节点与多个接收器节点中的每一个之间的无线信道条件。 使用测量的无线信道条件将多个接收机节点中的每一个分配给第一组和第二组中的一个，其中分配给第一组的接收机节点平均（例如，随时间的平均值），更好地测量 无线信道条件比分配给第二组的接收机节点。 选择第一组节点的接收器节点中的至少一些（例如，一个或多个）作为中继节点。 视频信息（例如N层）然后从视频服务器节点无线地传送，以便分配给第一组的每个接收机节点接收。 所选择的中继节点中的每一个然后发送视频信息的至少一部分（例如，M <= N个层），以供第二组的至少一些接收机节点接收，使得中继节点将至少一个 视频信息的一部分到第二组的所有接收器节点。 分配给第一组的接收器节点接收，解码并呈现所接收的视频信息。 类似地，分配给第二组的接收机节点接收，解码并呈现所接收的视频信息的至少一部分。 分配给第二组的接收机节点还可以使用由源节点无线发送的（1）视频信息和/或（2）由其他中继节点发送的视频信息的至少一部分的副本（即，中继 节点未分配给它），在这种信息被接收的范围内。

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：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。