公开(公告)号：US08441918B2

公开(公告)日：2013-05-14

申请号：US13204238

申请日：2011-08-05

申请人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

发明人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

IPC分类号： H04J11/00

CPC分类号： H04W36/08 ,  H04B7/022 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/0667 ,  H04B7/0697 ,  H04J11/0069 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/0048 ,  H04L7/0008 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2613 ,  H04L27/2627 ,  H04L27/2628 ,  H04L27/2663 ,  H04L27/2665 ,  H04L27/2672 ,  H04L27/2675

摘要： A method and apparatus are provided for performing acquisition, synchronization and cell selection within an MIMO-OFDM communication system. A coarse synchronization is performed to determine a searching window. A fine synchronization is then performed by measuring correlations between subsets of signal samples, whose first signal sample lies within the searching window, and known values. The correlations are performed in the frequency domain of the received signal. In a multiple-output OFDM system, each antenna of the OFDM transmitter has a unique known value. The known value is transmitted as pairs of consecutive pilot symbols, each pair of pilot symbols being transmitted at the same subset of sub-carrier frequencies within the OFDM frame.

公开(公告)号：US20130107929A1

公开(公告)日：2013-05-02

申请号：US13283022

申请日：2011-10-27

申请人： Jianglei Ma ,  Mohammadhadi Baligh

发明人： Jianglei Ma ,  Mohammadhadi Baligh

IPC分类号： H04W24/02 ,  H04W52/18 ,  H04W36/30

CPC分类号： H04B17/382 ,  H04B17/345 ,  H04W16/10 ,  H04W72/08

摘要： A system and method for operating mode self-adaptation are provided. A method for controller operations includes collecting performance information about a communications system, determining a performance indicator from the performance information, and automatically switching an operating mode of the communications system in response to determining that the performance indicator meets a performance threshold. The operating mode of the communications system includes the communications system operating in an inter-cell interference coordination (ICIC) mode or a non-ICIC mode, and the operating mode of the communications system remains unchanged in response to determining that the performance indicator does not meet the performance threshold.

摘要翻译： 提供了一种用于操作模式自适应的系统和方法。 一种用于控制器操作的方法包括收集关于通信系统的性能信息，从性能信息确定性能指标，以及响应于确定性能指标满足性能阈值，自动切换通信系统的操作模式。 通信系统的操作模式包括在小区间干扰协调（ICIC）模式或非ICIC模式中工作的通信系统，并且响应于确定性能指示符不是，通信系统的操作模式保持不变 满足性能阈值。

公开(公告)号：US20130022020A1

公开(公告)日：2013-01-24

申请号：US13616195

申请日：2012-09-14

申请人： Robert Novak ,  Hang Zhang ,  Sophie Vrzic ,  Mo-Han Fong ,  Kelvin Kar-Kin Au ,  Jianglei Ma ,  Peiying Zhu ,  Wen Tong

发明人： Robert Novak ,  Hang Zhang ,  Sophie Vrzic ,  Mo-Han Fong ,  Kelvin Kar-Kin Au ,  Jianglei Ma ,  Peiying Zhu ,  Wen Tong

IPC分类号： H04W72/04

CPC分类号： H04L1/0067 ,  H04L1/0013 ,  H04L1/0025 ,  H04L1/14 ,  H04L1/1614 ,  H04L1/1867 ,  H04L5/0007 ,  H04L5/0037 ,  H04L5/0042 ,  H04L5/0046 ,  H04L5/0064 ,  H04L29/06027 ,  H04L65/607 ,  H04L65/80 ,  H04L2001/0093

摘要： Methods and systems are provided for allocating resources including VoIP (voice over Internet Protocol) and Non-VoIP resources. In some embodiments, multiplexing schemes are provided for use with OFDMA (orthogonal frequency division multiplexing access) systems, for example for use in transmitting VoIP traffic. In some embodiments, various HARQ (Hybrid Automatic request) techniques are provided for use with OFDMA systems. In various embodiments, there are provided methods and systems for dealing with issues such as Handling non-full rate vocoder frames, VoIP packet jitter handling, VoIP capacity increasing schemes, persistent and non-persistent assignment of resources in OFDMA systems.

公开(公告)号：US20130012119A1

公开(公告)日：2013-01-10

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 ,  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：US20130010681A1

公开(公告)日：2013-01-10

申请号：US13620623

申请日：2012-09-14

申请人： Hua Xu ,  Jianglei Ma ,  Ming Jia ,  Hang Zhang

发明人： Hua Xu ,  Jianglei Ma ,  Ming Jia ,  Hang Zhang

IPC分类号： H04W72/04

CPC分类号： H04W72/042 ,  H04B7/155 ,  H04B7/2606

摘要： In a method of providing downlink retransmissions to a mobile station in a wireless communication network, the wireless communication network comprising a base station communicatively linked to a transparent relay station, the base station receives a request for a retransmission from the mobile station; schedules resources for the retransmission; signals scheduling information for the retransmission to the transparent relay station via a control link; and the transparent relay station receives the scheduling information for the retransmission on the control link; and sends the retransmission to the mobile station in a retransmit subframe on a retransmit frequency band.

摘要翻译： 在向无线通信网络中的移动台提供下行链路重发的方法中，所述无线通信网络包括通信地链接到透明中继站的基站，所述基站从所述移动台接收重发请求; 调度资源进行重传; 通过控制链路向所述透明中继站发送用于重传的调度信息; 透明中继站在控制链路上接收重发调度信息; 并在再发送频带的重发子帧中向移动台发送重发。

公开(公告)号：US20130003893A1

公开(公告)日：2013-01-03

申请号：US13608184

申请日：2012-09-10

申请人： Aaron Callard ,  Jianglei Ma

发明人： Aaron Callard ,  Jianglei Ma

IPC分类号： H04L27/00

CPC分类号： H04W72/005 ,  H04B7/0678 ,  H04B7/0689 ,  H04L5/0092 ,  H04W72/0453

摘要： Data is scrambled at a transmitter according to one of a number of predetermined scrambling sequences which are associated with a particular one of a number of predetermined transmit antenna diversity schemes (i.e., a specific number of transmit antenna ports). Received data is decoded using one or more of the known transmit antenna diversity schemes and the scrambled data is descrambled according to a corresponding descrambling sequence (related to the scrambling sequence). Based on the descrambled data, the receiver determines which transmit antenna diversity scheme (i.e., the number of antenna ports) is used by the transmitter. In one specific embodiment, CRC parity data is scrambled in the transmitter and the receiver descrambles the recovered CRC parity data according to a descrambling sequence, computes CRC parity data from the received data, and compares the descrambled CRC parity data to the newly computed CRC parity data.

公开(公告)号：US08325857B2

公开(公告)日：2012-12-04

申请号：US13349169

申请日：2012-01-12

申请人： Ming Jia ,  Jianglei Ma ,  Peiying Zhu ,  Wen Tong ,  Curt Dodd

发明人： Ming Jia ,  Jianglei Ma ,  Peiying Zhu ,  Wen Tong ,  Curt Dodd

IPC分类号： H03D1/00

CPC分类号： H03C3/00 ,  H04L25/0226 ,  H04L27/3488

摘要： The present invention employs hierarchical modulation to simultaneously transmit information on different modulation layers using a carrier RF signal. Initially, first data to be transmitted is assigned to a first modulation layer and second data is assigned to a second modulation layer. In one embodiment of the present invention, the first and second data are assigned based on reliability criteria. The first and second modulation layers are hierarchical modulation layers of the carrier RF signal. Once assigned, the first data is transmitted using the first modulation layer of the carrier RF signal and the second data is transmitted using the second modulation layer of the carrier RF signal. In one embodiment of the present invention, information may be transmitted to one end user using one modulation layer, and information may be transmitted to a different end user using a different modulation layer.

摘要翻译： 本发明采用层次调制，使用载波RF信号同时发送不同调制层上的信息。 首先，要发送的第一数据被分配给第一调制层，并且第二数据被分配给第二调制层。 在本发明的一个实施例中，基于可靠性标准来分配第一和第二数据。 第一和第二调制层是载波RF信号的分层调制层。 一旦被分配，使用载波RF信号的第一调制层发送第一数据，并且使用载波RF信号的第二调制层发送第二数据。 在本发明的一个实施例中，可以使用一个调制层向一个终端用户发送信息，并且可以使用不同的调制层向不同的终端用户发送信息。

公开(公告)号：US20120281676A1

公开(公告)日：2012-11-08

申请号：US13551726

申请日：2012-07-18

申请人： Jianglei Ma ,  Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Mo-Han Fong ,  Hang Zhang

发明人： Jianglei Ma ,  Wen Tong ,  Ming Jia ,  Peiying Zhu ,  Mo-Han Fong ,  Hang Zhang

IPC分类号： H04W36/18

CPC分类号： H04W36/18 ,  H04B7/022 ,  H04B7/0691

摘要： Soft handoff in an OFDMA system is disclosed. If the pilot signal strength for a base station exceeds the defined threshold, the base station is added to an active set list. Subcarriers in a plurality of orthogonal frequency division multiplexing (OFDM) symbols are divided and allocated into subchannels. The OFDM symbols are divided and multiplexed. A soft handoff zone with a first dimension of the subchannels and a second dimension of the divided and multiplexed OFDM symbols is defined. The soft handoff zone has subcarriers with a subchannel definition, for example, an identical permutation.

公开(公告)号：US08254246B2

公开(公告)日：2012-08-28

申请号：US12468624

申请日：2009-05-19

申请人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

发明人： Jianglei Ma ,  Ming Jia ,  Peiying Zhu ,  Wen Tong

IPC分类号： H04J11/00 ,  H04W4/00 ,  H04B7/216 ,  H04L27/00

CPC分类号： H04L27/2613 ,  H04B7/04 ,  H04B7/0413 ,  H04B7/0684 ,  H04L1/0618 ,  H04L5/0023 ,  H04L5/0048 ,  H04L25/0204 ,  H04L25/022 ,  H04L25/0234 ,  H04L25/0244 ,  H04L27/2602 ,  H04L27/2627 ,  H04W52/42

摘要： A method and apparatus are provided for reducing the number of pilot symbols within a MIMO-OFDM communication system, and for improving channel estimation within such a system. For each transmitting antenna in an OFDM transmitter, pilot symbols are encoded so as to be unique to the transmitting antenna. The encoded pilot symbols are then inserted into an OFDM frame to form a diamond lattice, the diamond lattices for the different transmitting antennae using the same frequencies but being offset from each other by a single symbol in the time domain. At the OFDM receiver, a channel response is estimated for a symbol central to each diamond of the diamond lattice using a two-dimensional interpolation. The estimated channel responses are smoothed in the frequency domain. The channel responses of remaining symbols are then estimated by interpolation in the frequency domain.

摘要翻译： 提供了一种用于减少MIMO-OFDM通信系统内的导频符号的数量并改善这种系统内的信道估计的方法和装置。 对于OFDM发射机中的每个发射天线，导频符号被编码为对于发射天线是唯一的。 然后将编码的导频符号插入到OFDM帧中以形成菱形晶格，使用相同频率的不同发射天线的菱形晶格，但是在时域中通过单个符号彼此偏移。 在OFDM接收机处，使用二维插值来估计针对钻石晶格的每个菱形的中心的符号的信道响应。 估计的信道响应在频域中被平滑化。 然后通过在频域中的内插来估计剩余符号的信道响应。

公开(公告)号：US20120202431A1

公开(公告)日：2012-08-09

申请号：US13445422

申请日：2012-04-12

申请人： Mark Andrew Hawryluck ,  Ming Jia ,  Jianglei Ma

发明人： Mark Andrew Hawryluck ,  Ming Jia ,  Jianglei Ma

IPC分类号： H04B15/00

CPC分类号： H04B7/0619 ,  H01Q3/26 ,  H04B7/024 ,  H04B7/0617 ,  H04W52/143 ,  H04W52/40

摘要： A method for reducing interference at a first user equipment (UE) includes receiving, by a second communications controller, a request to reduce interference at the first UE, the first UE being served by a first communications controller. The method also includes determining, by the second communications controller, a beam adjustment in accordance with uplink transmission measurements of the first UE and a second UE, the beam adjustment to aim a transmission to the second UE away from the second UE and towards an angle orthogonal to a first direction of the first UE relative to the second communications controller, the second UE being served by the second communications controller. The method further includes pre-adjusting, by the second communications controller, the transmission with the beam adjustment, and transmitting, by the second communications controller, the pre-adjusted transmission to the second UE.

摘要翻译： 一种减少第一用户设备（UE）干扰的方法包括由第二通信控制器接收减少第一UE的干扰的请求，第一UE由第一通信控制器服务。 该方法还包括由第二通信控制器确定根据第一UE和第二UE的上行链路传输测量的波束调整，波束调整以将来自第二UE的传输瞄准第二UE并朝向第二UE的角度 与第一UE的第一方向相对于第二通信控制器正交，第二UE由第二通信控制器服务。 该方法还包括由第二通信控制器预先调整具有波束调整的传输，并由第二通信控制器将预先调整的传输发送到第二UE。