公开(公告)号：US20080182580A1

公开(公告)日：2008-07-31

申请号：US12060249

申请日：2008-03-31

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04Q7/20

CPC分类号： H04W36/20 ,  H04W16/12 ,  H04W16/14 ,  H04W24/00 ,  H04W36/06 ,  H04W52/0235 ,  H04W52/08 ,  H04W52/281 ,  H04W52/283 ,  H04W52/286 ,  H04W52/287 ,  H04W52/288 ,  H04W52/60 ,  H04W56/00 ,  H04W68/02 ,  H04W68/025 ,  H04W72/00 ,  H04W72/048 ,  Y02D70/00

摘要： In many cellular systems, reusing spectrum bandwidth, creates problems in boundary regions between the cells and sectors where the signal strength received from adjacent base stations or adjacent sector transmissions of a single base station may be nearly equivalent. The invention creates a new type of diversity, referred to as multiple carrier diversity by utilizing multiple carriers, assigning different power levels to each carrier frequency at each base station, and/or offsetting sector antennas. The cell and/or sector coverage areas can be set so as to minimize or eliminate overlap between cell and/or sector boundary regions of different carrier frequencies. Mobile nodes traveling throughout the system can exploit multiple carrier diversity by detecting carriers and selecting to use a non-boundary carrier based on other system criteria in order to improve performance. Boundary carriers may, but need not be, identified and excluded from consideration for use by a wireless terminal.

摘要翻译： 在许多蜂窝系统中，重用频谱带宽在小区和扇区之间的边界区域中产生问题，其中从相邻基站接收的信号强度或单个基站的相邻扇区传输可能几乎相等。 本发明通过利用多个载波，在每个基站上为每个载波频率分配不同的功率电平和/或补偿扇区天线来创建一种称为多载波分集的新型分集。 可以设置小区和/或扇区覆盖区域以便最小化或消除不同载波频率的小区和/或扇区边界区域之间的重叠。 在整个系统中传播的移动节点可以通过检测载波并且基于其他系统标准选择使用非边界载波来利用多载波分集，以便提高性能。 边界运营商可以但不需要被识别并排除在考虑无线终端的使用之外。

公开(公告)号：US07398111B2

公开(公告)日：2008-07-08

申请号：US11174793

申请日：2005-07-05

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04B1/38 ,  H04B1/00

CPC分类号： H04W16/12 ,  H04W16/14 ,  H04W24/00 ,  H04W36/06 ,  H04W52/0235 ,  H04W52/028 ,  H04W52/08 ,  H04W52/281 ,  H04W52/283 ,  H04W52/286 ,  H04W52/287 ,  H04W52/288 ,  H04W52/60 ,  H04W68/02 ,  H04W68/025 ,  H04W72/00 ,  H04W72/0413 ,  H04W72/048 ,  Y02D70/23

摘要： The use of multiple states of mobile communication device operation to allow a single base station to support a relatively large number of mobile nodes is described. Various states require different amounts of communications resources, e.g., bandwidth and/or control signaling. Different numbers of control channels are monitored during different states of operation. A mobile node monitors during a first state of operation, e.g., the on-state, a first control channel to detect control signals in segments of the first control channel intended for the mobile node, detects a period of reduced control signaling to said mobile node on said first control channel, and then, in response to detecting a period of reduced control signal signaling to the mobile node, transitions from said first state to a second state of operation. During the second state of operation fewer control channels are monitored and the first control channel is not monitored.

摘要翻译： 描述了使用移动通信设备操作的多种状态来允许单个基站支持相对大量的移动节点。 各种状态需要不同数量的通信资源，例如带宽和/或控制信令。 在不同的操作状态下监视不同数量的控制通道。 移动节点在第一操作状态（例如，接通状态）中监视第一控制信道，以检测针对移动节点的第一控制信道的段中的控制信号，检测到对所述移动节点的减少控制信令的周期 在所述第一控制信道上，然后响应于检测到对移动节点的减少的控制信号信令的周期，从所述第一状态转换到第二操作状态。 在第二操作状态期间，监控较少的控制信道，并且不监视第一控制信道。

公开(公告)号：US20080014937A1

公开(公告)日：2008-01-17

申请号：US11487259

申请日：2006-07-14

申请人： Rajiv Laroia ,  Junyi Li ,  Pablo Anigstein ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Pablo Anigstein ,  Sathyadev Venkata Uppala

IPC分类号： H04Q7/20

CPC分类号： H04W76/11 ,  H04W8/26 ,  H04W48/12 ,  H04W72/04 ,  H04W92/10

摘要： A terminal is assigned an active identifier for use while in an active state of a connection with a base station. The base station periodically broadcasts the status of the active identifiers for that base station, e.g., via status validation bits that indicate whether each active identifier is currently assigned to a terminal or not assigned to any terminal. The base station may also broadcast the identity (e.g., a scrambling mask) of the terminal assigned with each active identifier that is currently in use. If a terminal believes that it is assigned a particular active identifier, then the terminal checks the status validation bit for this active identifier. If this status validation bit indicates that the active identifier is currently in use, then the terminal may further check the scrambling mask sent for the active identifier in order to determine whether the terminal is actually assigned the active identifier.

摘要翻译： 在处于与基站的连接的活动状态时，为终端分配有效标识符。 基站周期性地广播该基站的活动标识符的状态，例如，经由状态验证比特，其指示每个活动标识符是否当前分配给终端或者未分配给任何终端。 基站还可以广播分配有当前正在使用的每个活动标识符的终端的身份（例如，加扰掩码）。 如果终端认为分配了特定的活动标识符，则终端检查该活动标识符的状态验证位。 如果该状态验证位指示当前正在使用的活动标识符，则终端可进一步检查为活动标识符发送的加扰掩码，以确定终端是否实际分配了活动标识符。

公开(公告)号：US07295509B2

公开(公告)日：2007-11-13

申请号：US09805887

申请日：2001-03-15

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04J11/00 ,  H04B7/216 ,  H04J7/00 ,  H04B1/00

CPC分类号： H04L5/0007 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2636

摘要： A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.

摘要翻译： 提供了一种用于降低OFDM通信信号中的峰均比的方法。 该方法包括定义具有多个符号的星座，定义OFDM通信信号的符号持续时间，以及定义符号持续时间中的多个时刻。 将多个音调分配给特定的通信设备，并且通过将符号从星座映射到时刻在时域中构建离散信号。 通过对离散信号应用内插函数来生成连续信号，使得连续信号仅包括具有等于所分配音调的频率的正弦曲线。

公开(公告)号：US20070168326A1

公开(公告)日：2007-07-19

申请号：US11486601

申请日：2006-07-14

申请人： Arnab Das ,  Sundeep Rangan ,  Pablo Anigstein ,  Junyi Li ,  Sathyadev Venkata Uppala ,  Rajiv Laroia

发明人： Arnab Das ,  Sundeep Rangan ,  Pablo Anigstein ,  Junyi Li ,  Sathyadev Venkata Uppala ,  Rajiv Laroia

IPC分类号： G06F17/30

CPC分类号： H04W24/10 ,  H04L1/0006 ,  H04L1/0026 ,  H04W24/00

摘要： Techniques for efficiently sending reports in a wireless communication system are described. Reports may be sent repetitively in accordance with a reporting format. A terminal receives an assignment of a control channel used to send reports and determines a reporting format to use based on the assignment. The reporting format indicates a specific sequence of reports sent in specific locations of a control channel frame. The terminal generates a set of reports for each reporting interval and arranges the set of reports in accordance with the reporting format. The terminal repetitively sends a plurality of sets of reports in a plurality of reporting intervals. Reports may also be sent adaptively based on operating conditions. An appropriate reporting format may be selected based on the operating conditions of the terminal, which may be characterized by environment (e.g., mobility), capabilities, QoS, and/or other factors.

摘要翻译： 描述在无线通信系统中有效地发送报告的技术。 可以按照报告格式重复发送报告。 终端接收用于发送报告的控制信道的分配，并根据分配确定要使用的报告格式。 报告格式指示在控制信道帧的特定位置发送的特定报告序列。 终端为每个报告间隔生成一组报告，并根据报告格式安排报告集。 终端在多个报告间隔重复发送多组报告。 报告也可以根据操作条件自适应地发送。 可以基于可以由环境（例如，移动性），能力，QoS和/或其他因素来表征的终端的操作条件来选择适当的报告格式。

公开(公告)号：US07245920B2

公开(公告)日：2007-07-17

申请号：US10957194

申请日：2004-10-01

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04Q7/20

CPC分类号： H04W72/14 ,  H04W28/06 ,  H04W48/08 ,  H04W48/16 ,  H04W72/00 ,  H04W72/04 ,  H04W72/042

摘要： Allocation of a wireless communications system channel resource is managed by utilizing traffic segment allocation. This is realized by partitioning the channel resource into an assignment channel and a traffic channel in a fixed manner. The assignment channel includes assignment segments and the traffic channel includes traffic segments. The traffic segment is the basic traffic channel resource unit used to transport traffic data and has a prescribed finite time interval and bandwidth. Each traffic segment is associated with a so-called assignment segment in a prescribed manner. One or more traffic segments may be associated with a particular assignment segment. A base station broadcasts via an assignment segment which wireless terminal is to use a particular traffic segment. This is realized by transmitting a simply identifier for the particular wireless terminal assigned to the particular traffic segment in the assignment segment. Then, each active wireless terminal monitors all of the received assignment segments to detect any traffic channel assignments. Once a wireless terminal detects its identifier in an assignment segment, it proceeds to receive/transmit the traffic data in the traffic segment associated with the assignment segment including the detected identifier.

摘要翻译： 通过利用业务段分配来管理无线通信系统信道资源的分配。 这是通过以固定的方式将信道资源划分为分配信道和业务信道来实现的。 分配信道包括分配段，业务信道包括业务段。 流量段是用于传输流量数据的基本业务信道资源单元，具有规定的有限时间间隔和带宽。 每个流量段以规定的方式与所谓的分配段相关联。 一个或多个业务段可以与特定分配段相关联。 基站通过无线终端要使用特定业务段的分配段广播。 这通过为分配给分配段中的特定业务段的特定无线终端发送简单的标识符来实现。 然后，每个有源无线终端监视所有接收的分配段以检测任何业务信道分配。 一旦无线终端在分配段中检测到其标识符，它继续接收/发送与包括检测到的标识符的分配段相关联的业务段中的业务数据。

公开(公告)号：US06967936B1

公开(公告)日：2005-11-22

申请号：US09503040

申请日：2000-02-11

申请人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sundeep Rangan ,  Sathyadev Venkata Uppala

IPC分类号： H04J11/00 ,  H04B7/26 ,  H04L5/02 ,  H04L7/00 ,  H04L27/26 ,  H04Q7/00

CPC分类号： H04W56/0005 ,  H04J3/0682 ,  H04L5/023

摘要： Improved timing synchronization and access control techniques for use in an orthogonal frequency division multiplexed (OFDM) wireless system or other type of wireless communication system. In accordance with the invention, an uplink synchronization and access control system is provided in which mobile stations transmit certain timing and access signals in dedicated intervals in an uplink stream. Access control is illustratively implemented as a two-stage process in which a given mobile first transmits a generic uplink access signal in one of the intervals. If this access is accepted, the base station transmits an access acknowledgment containing initial timing and power corrections, along with initial channel assignments on which the mobile can initiate a call set-up process. For re-synchronization, mobiles transmit timing synchronization signals in the dedicated timing and access intervals. The base station measures the arrival time of the signals, and sends back appropriate timing corrections. The invention thereby ensures that orthogonality between mobiles is maintained.

摘要翻译： 用于正交频分复用（OFDM）无线系统或其他类型的无线通信系统中的改进的定时同步和接入控制技术。 根据本发明，提供一种上行链路同步和接入控制系统，其中移动台在上行链路流中以专用间隔发送某些定时和接入信号。 访问控制被示意性地实现为两阶段过程，其中给定移动单元首先在其中一个间隔中发送通用上行链路接入信号。 如果该接入被接受，则基站发送包含初始定时和功率校正的接入确认以及移动台可以在其上启动呼叫建立过程的初始信道分配。 为了重新同步，移动台以专用定时和接入间隔发送定时同步信号。 基站测量信号的到达时间，并发回适当的时序校正。 因此，本发明确保了移动台之间的正交性得以维持。

公开(公告)号：US06823191B2

公开(公告)日：2004-11-23

申请号：US09756384

申请日：2001-01-08

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04Q720

CPC分类号： H04W68/02 ,  H04W68/00

摘要： Latency in receiving and detecting paging messages at a wireless terminal is reduced by employing a unique “super” paging time slot format. A paging super time slot includes a plurality of prescribed time slots. Each wireless terminal is associated with cyclically recurring super time slots. A super slot is associated with one or more wireless terminals. A base station always selects the first available time slot in a super time slot to transmit a paging message to a wireless terminal that is associated with the super time slot. Each wireless terminal monitors every time slot in the associated super time slot until either detecting reception of its associated paging message or detecting an empty time slot. In another embodiment of the invention, a unique partially overlapping super time slot format is employed in which a super time slot has at least one time slot common to its adjacent super time slots. This allows wireless terminals associated with adjacent super time slots to share the common at least one time slot. In turn, this results in balanced traffic loads, smoothed traffic fluctuation and reduced congestion.

摘要翻译： 通过采用独特的“超级”寻呼时隙格式，减少了无线终端接收和检测寻呼消息的延迟。 寻呼超时隙包括多个规定的时隙。 每个无线终端与循环重复的超时隙相关联。 超级时隙与一个或多个无线终端相关联。 基站始终选择超时隙中的第一可用时隙，以将寻呼消息发送到与超时隙相关联的无线终端。 每个无线终端监视相关超时隙中的每个时隙，直到检测到其相关联的寻呼消息的接收或检测到空时隙。 在本发明的另一个实施例中，采用了唯一的部分重叠的超时隙格式，其中超时隙具有与其相邻超时隙共同的至少一个时隙。 这允许与相邻超时隙相关联的无线终端共享共同的至少一个时隙。 反过来，这导致平衡的流量负载，平滑的流量波动和减少的拥塞。

公开(公告)号：US08099099B2

公开(公告)日：2012-01-17

申请号：US11487053

申请日：2006-07-14

申请人： Rajiv Laroia ,  Vladimir Parizhisky ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Vladimir Parizhisky ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04W72/00

CPC分类号： H04W72/042 ,  H04W8/26

摘要： Methods and apparatus related to assignment in a wireless communications system are described. A mobile is assigned an identifier and a mask value, e.g., as part of a state transition message. The mobile uses the assigned identifier and/or the assigned mask value in determining whether assignments included in assignment messages, e.g., traffic channel assignment messages, are directed to the wireless terminal. Predetermined associations between assignment slots, assigned segments, and/or mask values are utilized to limit control signaling overhead. Different groups of segments are available for assignment to different wireless terminals as a function of mask values. Different types of assignment messages use different amounts of information bits to convey the assignment. Some types of assignments use a wireless terminal identifier, while other types of assignments use a wireless terminal identifier and a mask identifier. The mask identifier, e.g., a single bit, allows for selection between a subset of the potential masks used in the system.

摘要翻译： 描述与无线通信系统中的分配相关的方法和装置。 分配移动台的标识符和掩码值，例如，作为状态转换消息的一部分。 在确定包括在分配消息中的分配（例如业务信道分配消息）是否被指向无线终端的情况下，移动站使用分配的标识符和/或分配的掩码值。 使用分配时隙，分配段和/或掩码值之间的预定关联来限制控制信令开销。 根据屏蔽值的不同，不同的片段组可用于分配给不同的无线终端。 不同类型的分配消息使用不同数量的信息位来传送分配。 一些类型的分配使用无线终端标识符，而其他类型的分配使用无线终端标识符和掩码标识符。 掩模标识符，例如单个位，允许在系统中使用的潜在掩码的子集之间进行选择。

公开(公告)号：US08098569B2

公开(公告)日：2012-01-17

申请号：US12429927

申请日：2009-04-24

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04J11/00 ,  H04B7/216

CPC分类号： H04L5/0007 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2636

摘要： A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.