公开(公告)号：US09071322B2

公开(公告)日：2015-06-30

申请号：US13620634

申请日：2012-09-14

申请人： Jianglei Ma ,  Hua Xu ,  Hang Zhang ,  Peiying Zhu ,  Wen Tong

发明人： Jianglei Ma ,  Hua Xu ,  Hang Zhang ,  Peiying Zhu ,  Wen Tong

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

CPC分类号： H04B7/155 ,  H04B7/2606 ,  H04W16/26 ,  H04W84/047

摘要： Methods and apparatus are described for enabling downlink transparent relay in a wireless communication network. In a wireless communications network, a base station and a mobile station may communicate with each other via a relay station, as needed. Transparent relay may allow for relay communication between a base station and a mobile station although the mobile station is unaware of the relay station. However, non-contiguous transmission of a relay station may lead to channel quality measurement and channel estimation degradation during downlink transparent relay. According to some aspects, a base station may schedule a mobile station to a transmission mode that utilizes dedicated pilot signals for downlink transparent relay, and a relay station may transmit data and dedicated pilot signals over the same channel resources as the base station. According to some aspects, the relay station may null common pilot signals transmitted by the base station.

摘要翻译： 描述了用于在无线通信网络中启用下行链路透明中继的方法和装置。 在无线通信网络中，基站和移动台可以根据需要经由中继站进行通信。 尽管移动台不知道中继站，但是透明中继可以允许基站和移动台之间的中继通信。 然而，中继站的不连续传输可能导致下行链路透明中继期间的信道质量测量和信道估计恶化。 根据一些方面，基站可以将移动台调度为利用用于下行链路透明中继的专用导频信号的传输模式，并且中继站可以通过与基站相同的信道资源发送数据和专用导频信号。 根据一些方面，中继站可以丢弃由基站发送的公共导频信号。

公开(公告)号：US20110306291A1

公开(公告)日：2011-12-15

申请号：US13058708

申请日：2009-08-12

申请人： Jianglei Ma ,  Hua Xu ,  Hang Zhang ,  Peiying Zhu ,  Wen Tong

发明人： Jianglei Ma ,  Hua Xu ,  Hang Zhang ,  Peiying Zhu ,  Wen Tong

IPC分类号： H04B7/14 ,  H04B17/02

CPC分类号： H04B7/155 ,  H04B7/2606 ,  H04W16/26 ,  H04W84/047

摘要： Methods and apparatus are described for enabling downlink transparent relay in a wireless communication network. In a wireless communications network, a base station and a mobile station may communicate with each other via a relay station, as needed. Transparent relay may allow for relay communication between a base station and a mobile station although the mobile station is unaware of the relay station. However, non-contiguous transmission of a relay station may lead to channel quality measurement and channel estimation degradation during downlink transparent relay. According to some aspects, a base station may schedule a mobile station to a transmission mode that utilizes dedicated pilot signals for downlink transparent relay, and a relay station may transmit data and dedicated pilot signals over the same channel resources as the base station. According to some aspects, the relay station may null common pilot signals transmitted by the base station.

摘要翻译： 描述了用于在无线通信网络中启用下行链路透明中继的方法和装置。 在无线通信网络中，基站和移动台可以根据需要经由中继站进行通信。 尽管移动台不知道中继站，但是透明中继可以允许基站和移动台之间的中继通信。 然而，中继站的不连续传输可能导致下行链路透明中继期间的信道质量测量和信道估计恶化。 根据一些方面，基站可以将移动台调度为利用用于下行链路透明中继的专用导频信号的传输模式，并且中继站可以通过与基站相同的信道资源发送数据和专用导频信号。 根据一些方面，中继站可以丢弃由基站发送的公共导频信号。

公开(公告)号：US08737912B2

公开(公告)日：2014-05-27

申请号：US13058708

申请日：2009-08-12

申请人： Jianglei Ma ,  Hua Xu ,  Hang Zhang ,  Peiying Zhu ,  Wen Tong

发明人： Jianglei Ma ,  Hua Xu ,  Hang Zhang ,  Peiying Zhu ,  Wen Tong

IPC分类号： H04B7/14

CPC分类号： H04B7/155 ,  H04B7/2606 ,  H04W16/26 ,  H04W84/047

摘要： Methods and apparatus are described for enabling downlink transparent relay in a wireless communication network. In a wireless communications network, a base station and a mobile station may communicate with each other via a relay station, as needed. Transparent relay may allow for relay communication between a base station and a mobile station although the mobile station is unaware of the relay station. However, non-contiguous transmission of a relay station may lead to channel quality measurement and channel estimation degradation during downlink transparent relay. According to some aspects, a base station may schedule a mobile station to a transmission mode that utilizes dedicated pilot signals for downlink transparent relay, and a relay station may transmit data and dedicated pilot signals over the same channel resources as the base station. According to some aspects, the relay station may null common pilot signals transmitted by the base station.

摘要翻译： 描述了用于在无线通信网络中启用下行链路透明中继的方法和装置。 在无线通信网络中，基站和移动台可以根据需要经由中继站进行通信。 尽管移动台不知道中继站，但是透明中继可以允许基站和移动台之间的中继通信。 然而，中继站的不连续传输可能导致下行链路透明中继期间的信道质量测量和信道估计恶化。 根据一些方面，基站可以将移动台调度为利用用于下行链路透明中继的专用导频信号的传输模式，并且中继站可以通过与基站相同的信道资源发送数据和专用导频信号。 根据一些方面，中继站可以丢弃由基站发送的公共导频信号。

公开(公告)号：US08300570B2

公开(公告)日：2012-10-30

申请号：US12299259

申请日：2007-06-01

申请人： Hang Zhang ,  Jianglei Ma ,  Peiying Zhu ,  Wen Tong

发明人： Hang Zhang ,  Jianglei Ma ,  Peiying Zhu ,  Wen Tong

IPC分类号： H04B7/14

CPC分类号： H04B7/15542 ,  H04W88/04 ,  H04W92/10

摘要： One embodiment of the present invention provides a unique ranging technique in wireless communication environments that employ relay stations associated with a base station. Each relay station, and optionally the base station itself, can be allocated a unique ranging region having unique ranging resources that may be used by a mobile station to initiate a ranging function with the corresponding relay station or base station.

摘要翻译： 本发明的一个实施例提供了采用与基站相关联的中继站的无线通信环境中的唯一测距技术。 每个中继站以及可选的基站本身都可以被分配唯一的测距区域，该测距区域具有唯一的测距资源，该测距资源可以由移动台用于与对应的中继站或基站发起测距功能。

公开(公告)号：US20090073916A1

公开(公告)日：2009-03-19

申请号：US12299259

申请日：2007-06-01

申请人： Hang Zhang ,  Jianglei Ma ,  Peiying Zhu ,  Wen Tong

发明人： Hang Zhang ,  Jianglei Ma ,  Peiying Zhu ,  Wen Tong

IPC分类号： H04B7/204

CPC分类号： H04B7/15542 ,  H04W88/04 ,  H04W92/10

摘要： One embodiment of the present invention provides a unique ranging technique in wireless communication environments that employ relay stations associated with a base station. Each relay station, and optionally the base station itself, can be allocated a unique ranging region having unique ranging resources that may be used by a mobile station to initiate a ranging function with the corresponding relay station or base station.

摘要翻译： 本发明的一个实施例提供了采用与基站相关联的中继站的无线通信环境中的唯一测距技术。 每个中继站以及可选的基站本身都可以被分配唯一的测距区域，该测距区域具有唯一的测距资源，该测距资源可以由移动台用于与对应的中继站或基站发起测距功能。

公开(公告)号：US07630356B2

公开(公告)日：2009-12-08

申请号：US11547561

申请日：2005-04-05

申请人： Hang Zhang ,  Mo-Han Fong ,  Shalini Periyalwar ,  Peiying Zhu

发明人： Hang Zhang ,  Mo-Han Fong ,  Shalini Periyalwar ,  Peiying Zhu

IPC分类号： H04B7/208

CPC分类号： H04B7/0697 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0028 ,  H04L5/006 ,  H04L5/0085

摘要： Aspects of the present invention provide MAC enhancements to support the PHY features of a MIMO-OFDMA framework. The MAC enhancements involve DL burst assignment to support adaptive MIMO transmission, UL burst assignment to support adaptive MIMO transmission, fast feedback channel operation to support wireless terminal dynamic feedback of MIMO mode selection, for example space time transmit diversity (STTD) or spatial multiplexing (SM), and/or permutation mode selection, for example diversity or adjacent subcarrier mode, dynamic CQICH allocation and de-allocation and the use of CQICH_ID for DL burst allocation. One or more of these enhancements is included in a given implementation. Methods are also provided for implementing the MAC enhancements.

摘要翻译： 本发明的方面提供MAC增强以支持MIMO-OFDMA框架的PHY特征。 MAC增强涉及DL突发分配以支持自适应MIMO传输，UL突发分配以支持自适应MIMO传输，快速反馈信道操作以支持MIMO模式选择的无线终端动态反馈，例如空时传输分集（STTD）或空间复用（ SM）和/或置换模式选择，例如分集或相邻子载波模式，动态CQICH分配和去分配以及使用CQICH_ID进行DL突发分配。 这些增强中的一个或多个包括在给定的实现中。 还提供了实现MAC增强的方法。

公开(公告)号：US08514954B1

公开(公告)日：2013-08-20

申请号：US12397723

申请日：2009-03-04

申请人： Dong-Sheng Yu ,  Mo-Han Fong ,  Jianglei Ma ,  Sophie Vrzic ,  Hang Zhang

发明人： Dong-Sheng Yu ,  Mo-Han Fong ,  Jianglei Ma ,  Sophie Vrzic ,  Hang Zhang

IPC分类号： H04K1/10

CPC分类号： H04L27/2613 ,  H04B7/0413 ,  H04B7/0621 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/26 ,  H04L27/2611 ,  H04L27/2647 ,  H04L27/2662 ,  H04L2025/03414

摘要： The description herein relates to pilot designs for an Orthogonal Frequency Division Multiplexing (OFDM) based communication system. In the preferred embodiment, the communication system is one operating according to the IEEE 802.16m, or WiMax, standard. In general, an OFDM transmitter operates to insert pilot symbols into a resource of a transmit frame according to a predetermined staggered pilot symbol pattern defining pilot symbol locations within the resource of the transmit frame. The predetermined pilot symbol pattern is defined such that pilot symbols are located at or near time boundaries of the resource, at or near frequency boundaries of the resource, or both. By doing so, when generating a channel estimate for the communication channel between the OFDM transmitter and an OFDM receiver based on the pilot symbols, extrapolations needed to estimate the channel near the boundaries of the resource are optimized, thereby improving overall channel estimation accuracy.

公开(公告)号：US20120224659A1

公开(公告)日：2012-09-06

申请号：US13476242

申请日：2012-05-21

申请人： Dong-Sheng Yu ,  Mo-Han Fong ,  Jianglei Ma ,  Sophie Vrzic ,  Hang Zhang

发明人： Dong-Sheng Yu ,  Mo-Han Fong ,  Jianglei Ma ,  Sophie Vrzic ,  Hang Zhang

IPC分类号： H04B1/10 ,  H04L27/28

CPC分类号： H04L27/2613 ,  H04B7/0413 ,  H04B7/0621 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/26 ,  H04L27/2611 ,  H04L27/2647 ,  H04L27/2662 ,  H04L2025/03414

摘要： The description herein relates to pilot designs for an Orthogonal Frequency Division Multiplexing (OFDM) based communication system. In the preferred embodiment, the communication system is one operating according to the IEEE 802.16m, or WiMax, standard. In general, an OFDM transmitter operates to insert pilot symbols into a resource of a transmit frame according to a predetermined staggered pilot symbol pattern defining pilot symbol locations within the resource of the transmit frame. The predetermined pilot symbol pattern is defined such that pilot symbols are located at or near time boundaries of the resource, at or near frequency boundaries of the resource, or both. By doing so, when generating a channel estimate for the communication channel between the OFDM transmitter and an OFDM receiver based on the pilot symbols, extrapolations needed to estimate the channel near the boundaries of the resource are optimized, thereby improving overall channel estimation accuracy.

摘要翻译： 这里的描述涉及用于基于正交频分复用（OFDM）的通信系统的导频设计。 在优选实施例中，通信系统是根据IEEE 802.16m或WiMax标准进行操作的通信系统。 通常，OFDM发射机操作以根据在发送帧的资源内定义导频符号位置的预定交错导频符号模式将导频符号插入到发射帧的资源中。 定义的导频符号模式被定义为使得导频符号位于资源的时间边界处或附近，在资源的频率边界处或附近，或两者附近。 通过这样做，当基于导频符号生成OFDM发射机和OFDM接收机之间的通信信道的信道估计时，优化估计资源边界附近的信道所需的外推，从而提高整体信道估计精度。

公开(公告)号：US08537915B2

公开(公告)日：2013-09-17

申请号：US13476242

申请日：2012-05-21

申请人： Dong-Sheng Yu ,  Mo-Han Fong ,  Jianglei Ma ,  Sophie Vrzic ,  Hang Zhang

发明人： Dong-Sheng Yu ,  Mo-Han Fong ,  Jianglei Ma ,  Sophie Vrzic ,  Hang Zhang

IPC分类号： H04K1/10

CPC分类号： H04L27/2613 ,  H04B7/0413 ,  H04B7/0621 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/0226 ,  H04L27/26 ,  H04L27/2611 ,  H04L27/2647 ,  H04L27/2662 ,  H04L2025/03414

摘要： The description herein relates to pilot designs for an Orthogonal Frequency Division Multiplexing (OFDM) based communication system. In the preferred embodiment, the communication system is one operating according to the IEEE 802.16m, or WiMax, standard. In general, an OFDM transmitter operates to insert pilot symbols into a resource of a transmit frame according to a predetermined staggered pilot symbol pattern defining pilot symbol locations within the resource of the transmit frame. The predetermined pilot symbol pattern is defined such that pilot symbols are located at or near time boundaries of the resource, at or near frequency boundaries of the resource, or both. By doing so, when generating a channel estimate for the communication channel between the OFDM transmitter and an OFDM receiver based on the pilot symbols, extrapolations needed to estimate the channel near the boundaries of the resource are optimized, thereby improving overall channel estimation accuracy.

摘要翻译： 这里的描述涉及用于基于正交频分复用（OFDM）的通信系统的导频设计。 在优选实施例中，通信系统是根据IEEE 802.16m或WiMax标准进行操作的通信系统。 通常，OFDM发射机操作以根据在发送帧的资源内定义导频符号位置的预定交错导频符号模式将导频符号插入到发射帧的资源中。 定义的导频符号模式被定义为使得导频符号位于资源的时间边界处或附近，在资源的频率边界处或附近，或两者附近。 通过这样做，当基于导频符号生成OFDM发射机和OFDM接收机之间的通信信道的信道估计时，优化估计资源边界附近的信道所需的外推，从而提高整体信道估计精度。

公开(公告)号：US08891457B2

公开(公告)日：2014-11-18

申请号：US12086254

申请日：2006-12-08

申请人： Hang Zhang ,  Mohammadhadi Baligh ,  Mo-Han Fong ,  Dongsheng Yu ,  Sophie Vrzic ,  Jun Li ,  Wen Tong ,  Curt Dodd

发明人： Hang Zhang ,  Mohammadhadi Baligh ,  Mo-Han Fong ,  Dongsheng Yu ,  Sophie Vrzic ,  Jun Li ,  Wen Tong ,  Curt Dodd

IPC分类号： H04W4/00 ,  H04L12/66 ,  H04L1/18 ,  H04L5/00 ,  H04L1/00 ,  H04L1/06 ,  H04W72/04 ,  H04W72/12 ,  H04W28/04

CPC分类号： H04W72/1263 ,  H04L1/0016 ,  H04L1/0041 ,  H04L1/0045 ,  H04L1/0656 ,  H04L1/1812 ,  H04L1/1825 ,  H04L1/1887 ,  H04L1/1896 ,  H04L5/0092 ,  H04W28/04 ,  H04W72/04 ,  H04W72/042 ,  H04W72/06 ,  H04W72/1278

摘要： In a wireless communication system, a base station assigns resources to mobile stations using indices. Each index is associated with an assignment schedule for assigning resources. Once the base station determines an assignment schedule to assign particular resources, it encodes the schedule into an index and transmits it. A mobile station receives the index and decodes it to recover the assignment schedule. Both the base station and the mobile station may use look-up tables and/or algorithms for storing or generating indices associated with assignment schedules. To assign resources so as to indicate transmission characteristics over the resources, the base station transmits assignment blocks. Each assignment block indicates original transmission, retransmission, persistent assignment, non-persistent assignment, HARQ signaling, RAS-HARQ signaling, DRCH assignment, and/or LRCH assignment.

摘要翻译： 在无线通信系统中，基站使用索引向移动台分配资源。 每个索引与用于分配资源的分配调度相关联。 一旦基站确定了分配调度表来分配特定的资源，它将该进度编码成一个索引并发送它。 移动台接收索引并进行解码以恢复分配时间表。 基站和移动台都可以使用查找表和/或算法来存储或生成与分配计划相关联的索引。 为了分配资源以指示资源上的传输特性，基站发送分配块。 每个分配块指示原始传输，重传，持续分配，非持续分配，HARQ信令，RAS-HARQ信令，DRCH分配和/或LRCH分配。