公开(公告)号：US08614975B2

公开(公告)日：2013-12-24

申请号：US12561844

申请日：2009-09-17

申请人： Ravi Palanki ,  Parag A. Agashe ,  Vikram Gupta ,  Rajarshi Gupta ,  Naga Bhushan

发明人： Ravi Palanki ,  Parag A. Agashe ,  Vikram Gupta ,  Rajarshi Gupta ,  Naga Bhushan

IPC分类号： H04W4/00 ,  H04J3/06

CPC分类号： H04W56/0015

摘要： A method for synchronizing a wireless communication system is disclosed. A silence duration for a base station is determined based on the time required for a neighbor base station to obtain or maintain synchronization. All transmissions from the base station are ceased for the silence duration. Multiple base stations level may cease transmissions at the same time, thus mitigating interference.

公开(公告)号：US08566676B2

公开(公告)日：2013-10-22

申请号：US11943172

申请日：2007-11-20

申请人： Ravi Palanki ,  Jeremy H. Lin ,  Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal

发明人： Ravi Palanki ,  Jeremy H. Lin ,  Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal

IPC分类号： H03M13/00

CPC分类号： H04L1/0007 ,  H04L1/0009 ,  H04L1/0021 ,  H04L1/0042 ,  H04L1/1812 ,  H04L1/1822

摘要： Techniques for encoding and decoding data are described. In an aspect, multiple code rates for a forward error correction (FEC) code may be supported, and a suitable code rate may be selected based on packet size. A transmitter may obtain at least one threshold to use for code rate selection, determine a packet size to use for data transmission, and select a code rate from among the multiple code rates based on the packet size and the at least one threshold. In another aspect, multiple FEC codes of different types (e.g., Turbo, LDPC, and convolutional codes) may be supported, and a suitable FEC code may be selected based on packet size. The transmitter may obtain at least one threshold to use for FEC code selection and may select an FEC code from among the multiple FEC codes based on the packet size and the at least one threshold.

摘要翻译： 描述用于编码和解码数据的技术。 在一方面，可以支持用于前向纠错（FEC）码的多个码率，并且可以基于分组大小来选择合适的码率。 发射机可以获得用于码率选择的至少一个阈值，确定用于数据传输的分组大小，并且基于分组大小和至少一个阈值从多个码率中选择码率。 在另一方面，可以支持不同类型的多个FEC码（例如，Turbo，LDPC和卷积码），并且可以基于分组大小来选择合适的FEC码。 发射机可以获得用于FEC码选择的至少一个阈值，并且可以基于分组大小和至少一个阈值从多个FEC码中选择FEC码。

公开(公告)号：US08493887B2

公开(公告)日：2013-07-23

申请号：US12643845

申请日：2009-12-21

申请人： Ravi Palanki ,  Avneesh Agrawal ,  Naga Bhushan

发明人： Ravi Palanki ,  Avneesh Agrawal ,  Naga Bhushan

IPC分类号： H04L12/28 ,  H04W4/00

CPC分类号： H04W8/005 ,  H04W72/085 ,  H04W76/14

摘要： Techniques for centralized control of peer discovery pilot transmission are described. In an aspect, a designated network entity (e.g., a base station or a network controller) may control transmission of peer discovery pilots by stations located within its coverage area. In one design, the network entity may receive signaling triggering peer discovery pilot transmission. The network entity may direct each of at least one station to transmit a peer discovery pilot to allow one or more stations to detect the at least one station. The peer discovery pilot may include at least one synchronization signal or at least one reference signal. The network entity may receive pilot measurements from the one or more stations for peer discovery pilots from peer stations and/or reference signals from base stations. The network entity may determine whether or not to select peer-to-peer communication for two stations based on the pilot measurements.

摘要翻译： 描述了用于集中控制对等体发现导频传输的技术。 一方面，指定的网络实体（例如，基站或网络控制器）可以通过位于其覆盖区域内的站点来控制对等体发现导频的传输。 在一种设计中，网络实体可以接收信令触发对等体发现导频传输。 网络实体可以指示至少一个站中的每一个发送对等体发现导频，以允许一个或多个站检测至少一个站。 对等体发现导频可以包括至少一个同步信号或至少一个参考信号。 网络实体可以从一个或多个站接收来自对等站的对等体发现导频和/或来自基站的参考信号的导频测量。 网络实体可以基于导频测量来确定是否为两个站点选择对等通信。

公开(公告)号：US08451740B2

公开(公告)日：2013-05-28

申请号：US12407467

申请日：2009-03-19

申请人： Hemanth Sampath ,  Ravi Palanki ,  Jeremy H. Lin ,  Tamer A. Kadous

发明人： Hemanth Sampath ,  Ravi Palanki ,  Jeremy H. Lin ,  Tamer A. Kadous

IPC分类号： H04W4/00

CPC分类号： H04W52/0274 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

摘要： A method and apparatus are presented for compensating drifts in access terminals occurring during a sleep time. The method includes determining whether a sleep time exceeds a threshold, buffering time domain samples containing acquisition pilots and a paging channel, powering down RF circuitry in the access terminal after buffering samples, processing the samples to compensate for drift, and determining whether the access terminal was paged based upon the processed samples. The apparatus includes a digital front end, an FFT engine coupled to the digital front end, a symbol buffer coupled to the FFT engine, a processor coupled to the digital front end, FFT engine, and symbol buffer, and a memory coupled to the processor, the memory further comprising instructions for executing the method.

摘要翻译： 提出一种用于补偿在睡眠时间期间发生的接入终端中的漂移的方法和装置。 该方法包括：确定睡眠时间是否超过阈值，缓冲包含采集导频的时域采样和寻呼信道，在缓冲采样之后对接入终端中的RF电路进行供电，处理采样以补偿漂移，以及确定接入终端 根据加工样品进行分页。 该装置包括数字前端，耦合到数字前端的FFT引擎，耦合到FFT引擎的符号缓冲器，耦合到数字前端的处理器，FFT引擎和符号缓冲器以及耦合到处理器的存储器 所述存储器还包括用于执行所述方法的指令。

公开(公告)号：US08432939B2

公开(公告)日：2013-04-30

申请号：US12233970

申请日：2008-09-19

申请人： Kapil Bhattad ,  Ravi Palanki

发明人： Kapil Bhattad ,  Ravi Palanki

IPC分类号： H04J4/00

CPC分类号： H04L5/0044 ,  H04L5/0007 ,  H04L5/0053 ,  H04L5/0066 ,  H04L5/0091 ,  H04W28/18 ,  Y02D70/00 ,  Y02D70/1222 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/146

摘要： To assist in minimizing interference, a bandwidth range can have guards on either side to reduce leakage into neighboring bandwidth ranges. However, in relatively low power situations the risk of leakage is reduced. Therefore, the guard bandwidths can be used to open new channels upon which information can be transmitted. Thus, there can be a larger amount of bandwidth used while still retaining protective aspects, such as low interference to neighboring bands. Using the guard bandwidth to transmit new channels facilitates backward compatibility since legacy devices do not commonly monitor the guard bandwidth. These techniques can also be used at high power base stations by advertising a larger guard than necessary to legacy devices and using the additionally created guard bandwidth to transmit new channels.

摘要翻译： 为了帮助最小化干扰，带宽范围可以防止任何一方将泄漏减少到相邻的带宽范围。 然而，在相对低功率的情况下，泄漏的风险降低。 因此，保护​​带宽可以用于打开可以传输信息的新信道。 因此，可以存在更大量的带宽，同时仍然保留保护方面，例如对相邻频带的低干扰。 使用保护带宽传输新信道有助于向后兼容，因为传统设备通常不会监视保护带宽。 这些技术也可以在高功率基站上使用，比传统设备所需的更大的卫星，并使用另外创建的保护带宽来传输新的信道。

公开(公告)号：US08320407B2

公开(公告)日：2012-11-27

申请号：US11968631

申请日：2008-01-02

申请人： Ravi Palanki ,  Jeremy H. Lin ,  Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal

发明人： Ravi Palanki ,  Jeremy H. Lin ,  Aamod Khandekar ,  Alexei Gorokhov ,  Avneesh Agrawal

IPC分类号： H04J4/00

CPC分类号： H04L47/15 ,  H04L47/70

摘要： Techniques for transmitting data in a communication system are described. A packet may be partitioned into multiple subpackets, and each subpacket may be encoded separately. The subpackets may be mapped to resources assigned for transmission of the packet, with at least one subpacket being mapped to a subset of the assigned resources. The assigned resources may include multiple tiles, with each tile corresponding to a block of time frequency resources. The subpackets may be mapped to the tiles such that (i) the subpackets are mapped to equal number of tiles to achieve similar decoding performance, (ii) each subpacket is mapped to at least NMIN tiles, if available, to achieve a certain minimum diversity order for the subpacket, and/or (iii) each subpacket is mapped to a subset of the multiple tiles, if possible, so that the subpacket can be decoded without having to demodulate all of the tiles.

摘要翻译： 描述在通信系统中传输数据的技术。 分组可以被划分成多个子分组，并且每个子分组可以被分开编码。 子分组可以被映射到分配用于分组的传输的资源，其中至少一个子分组被映射到所分配的资源的子集。 分配的资源可以包括多个瓦片，其中每个瓦片对应于时间频率资源块。 子分组可以被映射到瓦片，使得（i）子分组被映射到相等数量的分块以实现类似的解码性能，（ii）每个子分组被映射到至少NMIN分块（如果可用），以获得一定的最小分集 如果可能，每个子分组被映射到多个分块的子集，使得子分组可以被解码而不必解调所有的分块。

公开(公告)号：US20120188994A1

公开(公告)日：2012-07-26

申请号：US13366727

申请日：2012-02-06

申请人： Ravi Palanki ,  Aamod Khandekar

发明人： Ravi Palanki ,  Aamod Khandekar

IPC分类号： H04B1/715 ,  H04W24/00

CPC分类号： H04B1/69 ,  H04L5/0007 ,  H04L5/0048 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/023 ,  H04L25/025 ,  H04L27/2613 ,  H04L2025/03624

摘要： A receiver for receiving a pilot generated based on a polyphase sequence having a constant time-domain envelope and a flat frequency spectrum is disclosed. In one design, the receiver includes at least one demodulator and at least one processor. The demodulator(s) receive at least one single-carrier frequency division multiple access (SC-FDMA) symbol transmitted via a communication channel and including pilot symbols generated based on a polyphase sequence. The demodulator(s) remove a cyclic prefix in each SC-FDMA symbol and demodulate the at least one SC-FDMA symbol to obtain received pilot symbols. The processor(s) derive a channel estimate for the communication channel based on the received pilot symbols.

摘要翻译： 公开了一种用于接收基于具有恒定时域包络和平坦频谱的多相序列产生的导频的接收机。 在一种设计中，接收机包括至少一个解调器和至少一个处理器。 解调器接收经由通信信道发送并包括基于多相序列生成的导频符号的至少一个单载波频分多址（SC-FDMA）符号。 解调器在每个SC-FDMA符号中去除循环前缀，并解调至少一个SC-FDMA符号以获得接收到的导频符号。 处理器基于接收到的导频符号导出通信信道的信道估计。

公开(公告)号：US08159928B2

公开(公告)日：2012-04-17

申请号：US11864644

申请日：2007-09-28

申请人： Alexei Gorokhov ,  Aamod Khandekar ,  Ravi Palanki

发明人： Alexei Gorokhov ,  Aamod Khandekar ,  Ravi Palanki

IPC分类号： H04J11/00

CPC分类号： H04L5/0007 ,  H04L5/0026 ,  H04L5/0053 ,  H04L5/0073 ,  H04L25/0228 ,  H04L25/03305 ,  H04W24/00 ,  H04W48/08 ,  H04W52/24 ,  H04W52/243 ,  H04W52/247 ,  H04W52/281 ,  H04W52/343 ,  H04W52/56 ,  H04W52/58

摘要： Interference management is provided through use of a user-based interference control and/or a network-based interference control. For user-based interference control, the terminals are informed of the inter-sector interference observed by the neighbor sectors and can adjust their transmit powers accordingly so that the inter-sector interference is maintained within acceptable levels. For network-based interference control, each sector is informed of the inter-sector interference observed by the neighbor sectors and regulates data transmissions for its terminals such that the inter-sector interference is maintained within acceptable levels. Each system may utilize only user-based interference control, or only network-based interference control, or both.

摘要翻译： 通过使用基于用户的干扰控制和/或基于网络的干扰控制来提供干扰管理。 对于基于用户的干扰控制，向终端通知相邻扇区观测到的扇区间干扰，并且可以相应地调整它们的发射功率，使得扇区间干扰保持在可接受的水平内。 对于基于网络的干扰控制，每个扇区被通知相邻扇区观测到的扇区间干扰，并调节其终端的数据传输，使得扇区间干扰保持在可接受的水平内。 每个系统可以仅利用基于用户的干扰控制，或仅使用基于网络的干扰控制，或两者。

公开(公告)号：US20120063492A1

公开(公告)日：2012-03-15

申请号：US13187273

申请日：2011-07-20

申请人： Ravi Palanki ,  Dhananjay Ashok Gore ,  Yongbin Wei

发明人： Ravi Palanki ,  Dhananjay Ashok Gore ,  Yongbin Wei

IPC分类号： H04B3/36

CPC分类号： H04W56/001 ,  H04B7/15585

摘要： Methods and apparatuses are provided that include a mobile station modem (MSM) embedded in a repeater for enhancing repeater functionality. The MSM can determine a timing of a base station based on one or more signals received therefrom. Using the timing, the repeater can align timing to that of the base station, determine cyclic prefix of the received signals, cancel echo from received signals, switch between receiving uplink and downlink signals, transmit PRSs according to the timing, and/or the like.

摘要翻译： 提供了包括嵌入在中继器中用于增强中继器功能的移动台调制解调器（MSM）的方法和装置。 MSM可以基于从其接收的一个或多个信号来确定基站的定时。 使用定时，中继器可以将定时与基站的定时对准，确定接收到的信号的循环前缀，从接收到的信号取消回波，在接收上行链路和下行链路信号之间切换，根据定时传输PRS等 。

公开(公告)号：US20120063369A1

公开(公告)日：2012-03-15

申请号：US13229426

申请日：2011-09-09

申请人： Dexu Lin ,  Ravi Palanki ,  Dhananjay Ashok Gore

发明人： Dexu Lin ,  Ravi Palanki ,  Dhananjay Ashok Gore

IPC分类号： H04W72/04 ,  H04W40/22 ,  H04W24/00 ,  H04B7/14

CPC分类号： H04W72/082 ,  H04B7/15542 ,  H04B7/15571 ,  H04W84/047

摘要： Methods and apparatuses are provided that include selecting resources for assigning to a device to mitigate relay self-interference when also communicating with a base station. The resources can be selected based on one or more factors, such as based on resources that are negotiated with the base station, or based on resources indicated as not desired for allocation from the base station, etc. In other examples, reference signals and control data can be communicated such as to mitigate relay self-interference as well.

摘要翻译： 提供了包括选择用于分配给设备的资源以在还与基站通信时减轻中继自身干扰的方法和装置。 可以基于一个或多个因素来选择资源，例如基于与基站协商的资源，或者基于指示为从基站分配不期望的资源。在其他示例中，参考信号和控制 可以传送数据，以减轻继电器自身干扰。