公开(公告)号：US07995527B2

公开(公告)日：2011-08-09

申请号：US12119774

申请日：2008-05-13

申请人： Junyi Li ,  Rajiv Laroia ,  Frank Lane

发明人： Junyi Li ,  Rajiv Laroia ,  Frank Lane

IPC分类号： H04W4/00 ,  H04W40/00

CPC分类号： H04W52/34 ,  H04B7/12 ,  H04L27/2662 ,  H04W52/343 ,  H04W52/42

摘要： Power control methods and apparatus for use in a sectorized cell of an OFDM communications system are described. Each sector of a cell uses the same frequencies and transmission times and is synchronized with the other sectors in the cell in terms of tone frequencies used at any given time and symbol transmission times. Tones are allocated to channels in each cell in the same manner so that each channel in a sector has a corresponding channel in another sector. Power differences between channels in different sectors are maintained to be within a pre-selected power difference. Different channels in a cell are assigned different power levels. Wireless terminals are assigned to channels based on channel feedback information. Wireless terminals with poor channel conditions are allocated to higher power channels than wireless terminals with good channel conditions. Lower power channels often include more tones per symbol time than high power channels.

摘要翻译： 描述了在OFDM通信系统的扇区化小区中使用的功率控制方法和装置。 单元的每个扇区使用相同的频率和传输时间，并且根据在任何给定时间和符号传输时间使用的音调频率与小区中的其他扇区同步。 以相同的方式将音调分配给每个小区中的信道，使得扇区中的每个信道在另一个扇区中具有相应的信道。 不同扇区中的信道之间的功率差被维持在预先选择的功率差之内。 单元中的不同通道被分配不同的功率电平。 基于信道反馈信息将无线终端分配给信道。 具有较差信道条件的无线终端分配给具有良好信道条件的无线终端的较高功率信道。 低功率通道通常每个符号时间包括比高功率通道更多的音调。

公开(公告)号：US20080291856A1

公开(公告)日：2008-11-27

申请号：US12119774

申请日：2008-05-13

申请人： Junyi Li ,  Rajiv Laroia ,  Frank Lane

发明人： Junyi Li ,  Rajiv Laroia ,  Frank Lane

IPC分类号： H04B7/212

CPC分类号： H04W52/34 ,  H04B7/12 ,  H04L27/2662 ,  H04W52/343 ,  H04W52/42

摘要： Power control methods and apparatus for use in a sectorized cell of an OFDM communications system are described. Each sector of a cell uses the same frequencies and transmission times and is synchronized with the other sectors in the cell in terms of tone frequencies used at any given time and symbol transmission times. Tones are allocated to channels in each cell in the same manner so that each channel in a sector has a corresponding channel in another sector. Power differences between channels in different sectors are maintained to be within a pre-selected power difference. Different channels in a cell are assigned different power levels. Wireless terminals are assigned to channels based on channel feedback information. Wireless terminals with poor channel conditions are allocated to higher power channels than wireless terminals with good channel conditions. Lower power channels often include more tones per symbol time than high power channels.

摘要翻译： 描述了在OFDM通信系统的扇区化小区中使用的功率控制方法和装置。 单元的每个扇区使用相同的频率和传输时间，并且根据在任何给定时间和符号传输时间使用的音调频率与小区中的其他扇区同步。 以相同的方式将音调分配给每个小区中的信道，使得扇区中的每个信道在另一个扇区中具有相应的信道。 不同扇区中的信道之间的功率差被维持在预先选择的功率差之内。 单元中的不同通道被分配不同的功率电平。 基于信道反馈信息将无线终端分配给信道。 具有较差信道条件的无线终端分配给具有良好信道条件的无线终端的较高功率信道。 低功率通道通常每个符号时间包括比高功率通道更多的音调。

公开(公告)号：US20070211680A1

公开(公告)日：2007-09-13

申请号：US11621986

申请日：2007-01-10

申请人： Rajiv Laroia ,  Frank Lane ,  Junyi Li ,  Tom Richardson

发明人： Rajiv Laroia ,  Frank Lane ,  Junyi Li ,  Tom Richardson

IPC分类号： H04Q7/24

CPC分类号： H04W40/244 ,  H04J3/0602 ,  H04L5/0016 ,  H04L5/0035 ,  H04L5/0048 ,  H04L27/2601 ,  H04L27/261 ,  H04W8/005 ,  H04W16/14 ,  H04W28/04 ,  H04W28/18 ,  H04W36/16 ,  H04W36/24 ,  H04W40/24 ,  H04W48/08 ,  H04W48/16 ,  H04W48/20 ,  H04W52/0229 ,  H04W52/04 ,  H04W72/02 ,  H04W76/14 ,  H04W84/042 ,  H04W84/18 ,  H04W88/02 ,  H04W88/04 ,  H04W88/06 ,  H04W88/10 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/22 ,  Y02D70/23

摘要： Wireless devices, e.g., in a cognitive radio network, discover and use locally available usable spectrum for communication. Beacon signaling facilitates available spectrum discovery and spectrum usage coordination. A wireless terminal, which may have entered a new area and powered up, monitors to detect for the presence of beacon signals in a first communications band. The wireless terminal makes a decision as to whether or not to transmit based on the monitoring result. In addition, when beacon signals are detected, decoded information recovered by the wireless terminal from the received beacon signals is used in making the transmission decision. The decoded information includes, e.g., type information indicating that a second band is allowed to be used for peer-peer communications and/or identification information identifying at least one of a wireless communications device which transmitted the beacon signal and a current user of the wireless communications device which transmitted the beacon signal.

摘要翻译： 无线设备，例如在认知无线电网络中，发现并使用本地可用的可用频谱进行通信。 信标信号促进了可用的频谱发现和频谱使用协调。 可能进入新区域并加电的无线终端监视以检测第一通信频带中信标信号的存在。 无线终端基于监视结果判断是否发送。 此外，当检测到信标信号时，使用由接收的信标信号由无线终端恢复的解码信息进行发送决定。 解码信息包括例如指示第二频带被允许用于对等通信的类型信息和/或标识发送信标信号的无线通信设备和无线电的当前用户中的至少一个的识别信息 发送信标信号的通信装置。

公开(公告)号：US20070021121A1

公开(公告)日：2007-01-25

申请号：US11216770

申请日：2005-08-31

申请人： Frank Lane ,  Rajiv Laroia ,  Junyi Li

发明人： Frank Lane ,  Rajiv Laroia ,  Junyi Li

IPC分类号： H04Q7/20

CPC分类号： H04B7/01 ,  G01S5/0009 ,  G01S5/0284 ,  H04W56/0025 ,  H04W56/0035 ,  H04W56/006 ,  H04W92/10

摘要： A wireless terminal determines the position of a moving base station and determines timing and/or frequency corrections. A wireless terminal determines its relative position with respect to the base station and determines a timing adjustment correction. The wireless terminal applies the determined timing correction to control uplink signaling timing and achieve synchronization at the base station's receiver. The wireless terminal determines its relative velocity with respect to the moving base station and determines a Doppler shift adjustment which it adds to the uplink carrier frequency or to its baseband signal. Base station position is determined from the current time and stored information correlating the base station position with time, e.g., for a geo-synchronous satellite. Base station position information, e.g., a GPS derived base station position fix, is determined from downlink airlink broadcast information, e.g., for an aircraft base station. Wireless terminals may be mobile and include a GPS receiver for wireless terminal position determination.

摘要翻译： 无线终端确定移动基站的位置并确定定时和/或频率校正。 无线终端确定其相对于基站的相对位置并确定定时调整校正。 无线终端应用所确定的定时校正以控制上行链路信令定时，并在基站的接收机处实现同步。 无线终端确定其相对于移动基站的相对速度，并确定其添加到上行链路载波频率或其基带信号的多普勒频移调整。 基站位置是从当前时间确定的，并存储与基站位置和时间相关的信息，例如用于地理同步卫星。 基站位置信息，例如，GPS导出的基站位置定位，是从下行链路空中链路广播信息（例如飞机基站）确定的。 无线终端可以是移动的，并且包括用于无线终端位置确定的GPS接收器。

公开(公告)号：US20060205356A1

公开(公告)日：2006-09-14

申请号：US11249775

申请日：2005-10-13

申请人： Rajiv Laroia ,  Junyi Li ,  Frank Lane

发明人： Rajiv Laroia ,  Junyi Li ,  Frank Lane

IPC分类号： H04B7/00

CPC分类号： H04B7/088 ,  H04B7/0811 ,  H04B7/0848

摘要： Base stations transmit strip signals using strip signal segments and self supporting modulation scheme techniques facilitating rapid channel estimate. A strip segment occupies one OFDM symbol time interval and uses a set of downlink tones; some, e.g., half, of the tones are left unused facilitating SIR measurement. The strip segments are advantageously timed to correspond to uplink access intervals in which connected wireless terminals do not typically transmit uplink signals. Connected wireless terminals including: multiple antennas used in combination, an antenna duplex module, single RF receiver chain and single RF transmitter chain, switch antenna coefficient combinations based on strip signal segment timing. The wireless terminal determines an independent downlink channel quality measurement, e.g., SNR and/or SIR for each strip signal segment and for on-going non-strip signaling. The wireless terminal compares channel quality measurements and selects an antenna coefficient combination to be used during non-strip signaling intervals obtaining very good antenna gain.

摘要翻译： 基站使用带状信号段和自支持调制方案技术来传输带状信号，这有助于快速信道估计。 条带占用一个OFDM符号时间间隔并使用一组下行链路音调; 一些，例如一半的音调被置于未使用状态，便于SIR测量。 带状段有利地被定时以对应于其中连接的无线终端通常不发送上行链路信号的上行链路接入间隔。 连接的无线终端包括：组合使用多个天线，天线双工模块，单个射频接收机链和单个射频发射机链，基于条带信号段定时的开关天线系数组合。 无线终端确定独立的下行链路信道质量测量，例如每个条带信号段的SNR和/或SIR，以及用于正在进行的非条带信令。 无线终端比较信道质量测量并选择在非剥离信令间隔期间使用的天线系数组合，从而获得非常好的天线增益。

公开(公告)号：US20060099915A1

公开(公告)日：2006-05-11

申请号：US11284285

申请日：2005-11-21

申请人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Frank Lane ,  Prashanth Hande

发明人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Murari Srinivasan ,  Frank Lane ,  Prashanth Hande

IPC分类号： H04B7/00

CPC分类号： H04B7/0604 ,  H01Q3/24 ,  H01Q3/2605 ,  H04B7/061 ,  H04B7/0691 ,  H04B7/0805 ,  H04L1/0026 ,  H04L5/0007 ,  H04L5/0023 ,  H04L5/0026 ,  H04L5/006 ,  H04W52/42

摘要： Transmit and/or receive diversity is achieved using multiple antennas. In some embodiments, a single transmitter chain within a wireless terminal is coupled over time to a plurality of transmit antennas. At any given time, a controllable switching module couples the single transmitter chain to one the plurality of transmit antennas. Over time, the switching module couples the output signals from the single transmitter chain to different transmit antennas. Switching decisions are based upon predetermined information, dwell information, and/or channel condition feedback information. Switching is performed on some dwell and/or channel estimation boundaries. In some OFDM embodiments, each of multiple transmitter chains is coupled respectively to a different transmit antenna. Information to be transmitted is mapped to a plurality of tones. Different subsets of tones are formed for and transmitted through different transmit chain/antenna sets simultaneously. The balance of tones allocated to the subsets for each antenna are changed as a function of predetermined information, dwell information, and/or channel condition feedback information.

公开(公告)号：US20060083189A1

公开(公告)日：2006-04-20

申请号：US10965011

申请日：2004-10-14

申请人： Rajiv Laroia ,  Frank Lane ,  Junyi Li

发明人： Rajiv Laroia ,  Frank Lane ,  Junyi Li

IPC分类号： H04J11/00 ,  H04B7/204

CPC分类号： H04L5/0044 ,  H04L5/0048 ,  H04L5/0053

摘要： Methods and apparatus for using high power narrow signals, e.g., tones, for communicating transmitter information without putting the full transmission power available into the transmitted tone or tones are described. User data is transmitted in parallel with transmitter information in many embodiments with the user data being allocated more than 20% of the transmitter's maximum output power in many cases. Buy using an amount of power on the tones used to communicate transmitter information while simultaneously transmitting user data with more than 20% of the available transmission power, efficient bandwidth utilization is achieved while still ensuring a high probability that that the transmitter information signals will be received and detectable using simple energy detection techniques and without the need for timing synchronization with the transmitter to be achieved for success interpretation of the transmitter information.

公开(公告)号：US20050233746A1

公开(公告)日：2005-10-20

申请号：US10964946

申请日：2004-10-14

申请人： Rajiv Laroia ,  Junyi Li ,  Frank Lane

发明人： Rajiv Laroia ,  Junyi Li ,  Frank Lane

IPC分类号： H04B1/00 ,  H04B1/10 ,  H04B1/38 ,  H04B1/40 ,  H04B15/00 ,  H04B17/00 ,  H04B17/02 ,  H04L1/20 ,  H04L5/02 ,  H04L27/26 ,  H04W36/08 ,  H04W36/30 ,  H04W72/02 ,  H04Q7/20

CPC分类号： H04L1/20 ,  H04B1/005 ,  H04B1/1027 ,  H04B1/406 ,  H04B17/327 ,  H04B17/382 ,  H04L5/023 ,  H04L27/261 ,  H04W24/00 ,  H04W36/30 ,  H04W48/08 ,  H04W72/02 ,  H04W72/0453

摘要： Carrier frequency selection and handoff initiation methods in wireless communications systems employing multiple carrier frequencies are described. Although the receiver is tuned to a single band, based on the relative energy of one or more beacon signal components corresponding to the currently used carrier and one or more beacon signal components corresponding to an alternative carrier, a carrier selection and a handoff determination is made. Mobile nodes can use a single RF chain with a controllable RF filter to receive and process a signal within a first selected carrier band including components from different transmitters, e.g., a first signal component identified with the first currently selected band and a second signal component identified with a second alternative band. The signal components, e.g., beacon signal components from different transmitters may be obtained from a signal which corresponds to multiple symbol transmission time periods. Separate signal energy measurements are performed on the first and second signal components. The signal component energy is compared, and a determination is made as to whether a handoff should be initiated.

摘要翻译： 描述了采用多个载波频率的无线通信系统中的载波频率选择和切换发起方法。 虽然接收机被调谐到单个频带，但是基于对应于当前使用的载波的一个或多个信标信号分量的相对能量和对应于替代载波的一个或多个信标信号分量，进行载波选择和切换确定 。 移动节点可以使用具有可控RF滤波器的单个RF链来接收和处理包括来自不同发射机的组件的第一选定载波频带内的信号，例如，识别有第一当前选择的频带的第一信号分量和识别出的第二信号分量 与第二个替代乐队。 信号分量，例如来自不同发射机的信标信号分量可以从对应于多符号传输时间段的信号获得。 对第一和​​第二信号分量执行单独的信号能量测量。 比较信号分量能量，并确定是否应启动切换。

公开(公告)号：US20050233716A1

公开(公告)日：2005-10-20

申请号：US10965117

申请日：2004-10-14

申请人： Rajiv Laroia ,  Junyi Li ,  Frank Lane

发明人： Rajiv Laroia ,  Junyi Li ,  Frank Lane

IPC分类号： H04B1/00 ,  H04B1/10 ,  H04B1/40 ,  H04B7/08 ,  H04B15/00 ,  H04B17/00 ,  H04B17/02 ,  H04M1/00

CPC分类号： H04B1/1027 ,  H04B1/005 ,  H04B1/3805 ,  H04B1/406 ,  H04B7/0808 ,  H04B7/0814 ,  H04B7/0817 ,  H04B17/327 ,  H04B17/382

摘要： Receivers accommodating frequency band selection methods in wireless communications systems are described. Different frequency bands are associated with different alternative carrier frequencies and/or base station cell and/or sector transmitter connection alternatives. Mobile node receivers include two receiver chains, each chain processing signals corresponding to a carrier. In some embodiments, each receiver chain includes its own controllable RF module, and individual carrier band selection is performed in each RF module. In some embodiments, the two receiver chains share a common RF module; however, each chain includes its own controllable baseband filter. In various embodiments, the first chain has higher complexity than the second chain. In most embodiments, each chain uses the same technology, e.g., spread spectrum OFDM or CDMA. Each chain obtains a quality indicator value on a different band and a comparison of quality indicator values is used in selecting the channel and carrier band for downlink traffic signaling.

摘要翻译： 描述了在无线通信系统中容纳频带选择方法的接收机。 不同的频带与不同的替代载波频率和/或基站小区和/或扇区发射机连接替代方案相关联。 移动节点接收器包括两个接收器链，每个链处理信号对应于载波。 在一些实施例中，每个接收器链包括其自己的可控RF模块，并且在每个RF模块中执行单独的载波频带选择。 在一些实施例中，两个接收器链共享共同的RF模块; 然而，每个链包括其自己的可控基带滤波器。 在各种实施例中，第一链具有比第二链更高的复杂性。 在大多数实施例中，每个链使用相同的技术，例如扩频OFDM或CDMA。 每个链在不同频带上获得质量指标值，并且在选择用于下行链路业务信令的信道和载波频带时使用质量指标值的比较。

公开(公告)号：US20070274276A1

公开(公告)日：2007-11-29

申请号：US11621990

申请日：2007-01-10

申请人： Rajiv Laroia ,  Frank Lane ,  Junyi Li ,  Tom Richardson

发明人： Rajiv Laroia ,  Frank Lane ,  Junyi Li ,  Tom Richardson

IPC分类号： H04Q7/24

CPC分类号： H04W40/244 ,  H04J3/0602 ,  H04L5/0016 ,  H04L5/0035 ,  H04L5/0048 ,  H04L27/2601 ,  H04L27/261 ,  H04W8/005 ,  H04W16/14 ,  H04W28/04 ,  H04W28/18 ,  H04W36/16 ,  H04W36/24 ,  H04W40/24 ,  H04W48/08 ,  H04W48/16 ,  H04W48/20 ,  H04W52/0229 ,  H04W52/04 ,  H04W72/02 ,  H04W76/14 ,  H04W84/042 ,  H04W84/18 ,  H04W88/02 ,  H04W88/04 ,  H04W88/06 ,  H04W88/10 ,  Y02D70/1222 ,  Y02D70/1224 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/164 ,  Y02D70/168 ,  Y02D70/22 ,  Y02D70/23

摘要： A wireless terminal determines a desired mode of base station operation with regard to whether the base station is to function as a network access node or is to function in a peer to peer mode with regard to a frequency band, and communicates a change signal to the base station. Some change signals are request signals requesting a base station to dynamically reallocate spectrum usage, while other change signals are command signals ordering the base station to reallocate spectrum usage. Information indicating a level of authority corresponding to the change signals, in some embodiments, corresponds to one of a device identifier, a user identifier, and a priority level indicator. An exemplary command signal comes from a device used by a government agent with the authority to override spectrum usage.

摘要翻译： 无线终端关于基站是否用作网络接入节点或者相对于频带在对等模式中起作用，确定基站操作的期望模式，并且将改变信号传送到 基站。 一些改变信号是请求信号来请求基站动态地重新分配频谱使用，而其它改变信号是命令信号来排序基站来重新分配频谱使用。 在一些实施例中，指示对应于改变信号的权限级别的信息对应于设备标识符，用户标识符和优先级指示符之一。 示例性命令信号来自政府代理使用的设备，其具有超越频谱使用的权限。