公开(公告)号：US20120263249A1

公开(公告)日：2012-10-18

申请号：US13532477

申请日：2012-06-25

申请人： Junyi Li ,  Saurabha Tavildar ,  Rajiv Laroia ,  Thomas Richardson

发明人： Junyi Li ,  Saurabha Tavildar ,  Rajiv Laroia ,  Thomas Richardson

IPC分类号： H04B15/00 ,  H04L27/00 ,  H04L27/28

CPC分类号： H04L1/0045 ,  H04L1/20 ,  H04L1/201 ,  H04L5/0007 ,  H04L5/0033 ,  H04L5/0058

摘要： Aspects relate to mitigating interference in a communication network that does not employ a centralized scheduler. A transmission sent on a subset of resources is evaluated to determine a number of communication pairs that have selected that subset of resources on which to transmit. If there are a large number of communication pairs transmitting on that subset, the transmission is ignored by a receiving device. The number of degrees of freedom that contain energy on the subset is evaluated to determine if an expected number of degrees of freedom that should have energy is met or exceeded. If the expected threshold number is met or exceed, the transmission is decoded by the receiving device, else the transmission is not decoded.

摘要翻译： 方面涉及减轻不采用集中式调度器的通信网络中的干扰。 对资源子集发送的传输进行评估，以确定已经选择要发送的资源子集的多个通信对。 如果在该子集上有大量的通信对传输，则传输被接收设备忽略。 评估在子集上含有能量的自由度的数量，以确定是否满足或超过应具有能量的预期自由度数。 如果满足或超过预期阈值数，则传输由接收​​设备解码，否则传输不被解码。

公开(公告)号：US08248996B2

公开(公告)日：2012-08-21

申请号：US12510353

申请日：2009-07-28

申请人： Junyi Li ,  Saurabh Tavildar ,  Aleksandar Jovicic ,  Thomas Richardson

发明人： Junyi Li ,  Saurabh Tavildar ,  Aleksandar Jovicic ,  Thomas Richardson

IPC分类号： H04W4/00

CPC分类号： H04W74/0816

摘要： Methods and apparatus of using a licensed spectrum to transmit a signal when an unlicensed spectrum is congested are disclosed. One method includes receiving, at a first mobile device, a request signal from a second mobile device, receiving, at the first mobile device, a remote signal from one or more mobile devices using the unlicensed spectrum, and transmitting a control signal from the first mobile device to the second mobile device using the licensed spectrum, the control signal being based on the remote signal. The control signal carries control information that is based on at least one of a time at which the second mobile device sends a signal to the first mobile device or the received powers of the remote signal and the request signal.

摘要翻译： 公开了当未授权频谱拥塞时使用许可频谱来发送信号的方法和装置。 一种方法包括在第一移动设备处接收来自第二移动设备的请求信号，在第一移动设备处使用未授权频谱从一个或多个移动设备接收远程信号，以及从第一移动设备发送来自第一移动设备的控制信号 移动设备使用许可频谱的第二移动设备，控制信号基于远程信号。 控制信号携带基于第二移动设备向第一移动设备发送信号的时间或远程信号的接收功率和请求信号中的至少一个的控制信息。

公开(公告)号：US08248947B2

公开(公告)日：2012-08-21

申请号：US12507578

申请日：2009-07-22

申请人： Junyi Li ,  Saurabh Tavildar ,  Aleksandar Jovicic ,  Thomas Richardson

发明人： Junyi Li ,  Saurabh Tavildar ,  Aleksandar Jovicic ,  Thomas Richardson

IPC分类号： G01R31/08

CPC分类号： H04W72/085 ,  H04W16/14 ,  H04W88/06 ,  Y02D70/142 ,  Y02D70/164

摘要： Methods and apparatus of using a licensed spectrum to transmit data when an unlicensed spectrum is congested are disclosed. The method includes transmitting a first signal from a first mobile device to a second mobile device using an unlicensed spectrum, determining, at the first mobile device, whether a first response signal has been received by the first mobile device using the unlicensed spectrum, and transmitting a second signal from the first mobile device to the second mobile device using a licensed spectrum when the first response signal has not been received by the first mobile device using the unlicensed spectrum.

摘要翻译： 公开了当未许可频谱拥塞时使用许可频谱来发送数据的方法和装置。 该方法包括使用非许可频谱从第一移动设备向第二移动设备发送第一信号，在第一移动设备处确定第一移动设备是否已经使用未许可频谱接收到第一响应信号，并且发送 当第一移动设备未使用未许可频谱接收到第一响应信号时，使用许可频谱从第一移动设备到第二移动设备的第二信号。

公开(公告)号：US08213538B2

公开(公告)日：2012-07-03

申请号：US11945720

申请日：2007-11-27

申请人： Thomas Richardson ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li

发明人： Thomas Richardson ,  Hui Jin ,  Rajiv Laroia ,  Junyi Li

IPC分类号： H04L27/04

CPC分类号： H04L5/023 ,  H04B1/713 ,  H04B7/068 ,  H04B7/0691 ,  H04L1/06 ,  H04L25/0202 ,  H04L25/4902 ,  H04L27/2604 ,  H04W52/28 ,  H04W52/325

摘要： Methods and apparatus for improving the utilization of air link resources in a wireless communications system, e.g., an OFDM MIMO system, including a base station with multiple transmit antennas are described. Superposition signaling in the downlink is employed. The superimposed signal includes a first transform result signal and a second lower power signal. The first transform result signal is generated from a first signal, which uses position modulation, e.g., including null components and high power non-null components. Different components of the first transform result signal are directed to different transmit antennas. The first transform result signal communicates information to a first wireless terminal, e.g., a weak receiver. The non-null received elements of the first transform result signal are utilized by a second wireless terminal, e.g., a superior receiver, as pilots to determine a channel estimate. The second wireless terminal uses the determined channel estimate to demodulate received second signals.

摘要翻译： 描述了在包括具有多个发射天线的基站的无线通信系统（例如OFDM MIMO系统）中改善空中链路资源的利用的方法和装置。 采用下行链路中的叠加信令。 叠加信号包括第一变换结果信号和第二较低功率信号。 第一变换结果信号从使用位置调制的第一信号产生，例如包括零分量和高功率非零分量。 第一变换结果信号的不同组件被引导到不同的发射天线。 第一变换结果信号将信息传送到第一无线终端，例如弱接收机。 第一变换结果信号的非零接收元件由第二无线终端（例如，上级接收机）用作导频以确定信道估计。 第二无线终端使用确定的信道估计来解调所接收的第二信号。

公开(公告)号：US20120057646A1

公开(公告)日：2012-03-08

申请号：US12875419

申请日：2010-09-03

申请人： Aleksandar Jovicic ,  Cyril Measson ,  Thomas Richardson ,  Junyi Li

发明人： Aleksandar Jovicic ,  Cyril Measson ,  Thomas Richardson ,  Junyi Li

IPC分类号： H04L27/06 ,  H04L27/00

CPC分类号： H04W64/00 ,  G01S5/0289 ,  H04W4/021 ,  H04W4/20 ,  H04W28/06

摘要： Methods and apparatus for communicating the location of a mobile wireless communications device are described. Codewords, e.g., values or sets of bits, are selected from a codebook mapping different codewords to corresponding pieces of location information. In a first approach location information is communicated by using codewords from different codebooks with the product, e.g., intersection of location information provided by the codewords, providing relatively detailed location information using relatively few bits. In a second approach user specific codebooks are defined for individual users. The codewords in the codebook corresponding to a particular user map to locations the individual specific user is likely to frequent. In another approach codewords are transmitted at different power levels and/or using different coding rates. Received codewords corresponding to a device may be used in combination to determine the location or refine the understanding of the device location.

摘要翻译： 描述了用于传送移动无线通信设备的位置的方法和装置。 代码字，例如值或位组，从将不同码字映射到对应的位置信息的码本中选择。 在第一种方法中，通过使用来自具有产品的不同码本的码字来传送信息，例如由码字提供的位置信息的交集，使用相对较少的位提供相对详细的位置信息。 在第二种方法中，为个人用户定义了用户特定的码本。 与特定用户对应的码本中的码字映射到个体特定用户的位置可能频繁。 在另一种方法中，码字以不同的功率电平和/或使用不同的编码速率被发送。 可以组合使用与设备相对应的接收码字来确定位置或改善对设备位置的理解。

公开(公告)号：US08121097B2

公开(公告)日：2012-02-21

申请号：US12264661

申请日：2008-11-04

申请人： Junyi Li ,  Saurabh Tavildar ,  Thomas Richardson ,  Ying Wang ,  Aleksandar Jovicic

发明人： Junyi Li ,  Saurabh Tavildar ,  Thomas Richardson ,  Ying Wang ,  Aleksandar Jovicic

IPC分类号： H04J3/00 ,  H04B7/212

CPC分类号： H04W8/005 ,  H04B1/7143 ,  H04B2001/6908 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0042 ,  H04W72/02 ,  H04W72/0446

摘要： Techniques for transmitting signals using time hopping or time and frequency hopping are described. In one design, a terminal selects different slots to use for transmission in multiple frames with time hopping. Each frame includes multiple slots, and each slot covers a particular time duration. The selected slots are at different time locations in the multiple frames. In another design, a terminal selects different resource units to use for transmission in multiple frames with time and frequency hopping. The selected resource units are at different time and frequency locations in the multiple frames. For both designs, the terminal sends a signal (e.g., a peer discovery signal) in the selected slots or resource units in the multiple frames. The terminal may detect for signals (e.g., peer discovery signals) from other terminals in slots not used for transmission by the terminal.

摘要翻译： 描述了使用跳时或时间和跳频来发送信号的技术。 在一种设计中，终端选择不同的时隙用于在具有时间跳跃的多个帧中进行传输。 每个帧包括多个时隙，并且每个时隙覆盖特定的持续时间。 所选择的时隙位于多个帧中的不同时间位置。 在另一种设计中，终端选择不同的资源单元用于在具有时间和跳频的多个帧中进行传输。 所选择的资源单元在多个帧中处于不同的时间和频率位置。 对于这两种设计，终端在多个帧中的所选择的时隙或资源单元中发送信号（例如，对等体发现信号）。 终端可以在不用于由终端发送的时隙中检测来自其他终端的信号（例如，对等体发现信号）。

公开(公告)号：US07961708B2

公开(公告)日：2011-06-14

申请号：US11775787

申请日：2007-07-10

申请人： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Thomas Richardson ,  Xinzhou Wu ,  Leonard Grokop

发明人： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Thomas Richardson ,  Xinzhou Wu ,  Leonard Grokop

IPC分类号： H04J3/06

CPC分类号： H04L5/0053 ,  H04L5/0007

摘要： Systems and methodologies are described that facilitate identifying peers based upon encoded signals during peer discovery in a peer to peer network. For example, direct signaling that partitions a time-frequency resource into a number of segments can be utilized to communicate an identifier within a peer discovery interval; thus, a particular segment selected for transmission can signal a portion of the identifier, while a remainder can be signaled based upon tones communicated within the selected segment. Moreover, a subset of symbols within the resource can be reserved (e.g., unused) to enable identifying and/or correcting timing offset. Further, signaling can be effectuated over a plurality of peer discovery intervals such that partial identifiers communicated during each of the peer discovery intervals can be linked (e.g., based upon overlapping bits and/or bloom filter information).

摘要翻译： 描述了系统和方法，其便于在对等网络中的对等体发现期间基于编码信号来识别对等体。 例如，可以利用将时间 - 频率资源分割成多个段的直接信令来在对等设备发现间隔内传送标识符; 因此，选择用于传输的特定片段可以发送标识符的一部分，而可以基于在所选择的段内通信的音调来发信号通知剩余部分。 此外，可以保留资源内的符号子集（例如，未使用的）以使得能够识别和/或校正定时偏移。 此外，可以在多个对等点发现间隔上实现信令，使得可以链接每个对等设备发现间隔期间通信的部分标识符（例如，基于重叠位和/或布隆过滤器信息）。

公开(公告)号：US20110086664A1

公开(公告)日：2011-04-14

申请号：US12708084

申请日：2010-02-18

申请人： Junyi Li ,  Saurabh Tavildar ,  Aleksandar Jovicic ,  Thomas Richardson

发明人： Junyi Li ,  Saurabh Tavildar ,  Aleksandar Jovicic ,  Thomas Richardson

IPC分类号： H04B7/005

CPC分类号： H04W52/241 ,  H04W52/267 ,  H04W52/286

摘要： Methods and apparatus of varying transmit power of signals for increasing system throughput and spectral reuse in an unlicensed spectrum are disclosed. One method includes transmitting from a first mobile device to a second mobile device a request to send (RTS) signal having a first transmit data power level based on a channel gain between the first mobile device and the second mobile device, receiving, at the first mobile device, a clear to send (CTS) signal from the second mobile device, and transmitting data at the first transmit data power level from the first mobile device to the second mobile device.

摘要翻译： 公开了改变信号发射功率以提高未许可频谱中的系统吞吐量和频谱重用的方法和装置。 一种方法包括：基于第一移动设备和第二移动设备之间的信道增益，从第一移动设备向第二移动设备发送具有第一发送数据功率电平（RTS）信号的请求，在第一移动设备 移动设备，来自第二移动设备的清晰发送（CTS）信号，以及以第一传输数据功率级从第一移动设备向第二移动设备发送数据。

公开(公告)号：US20100279724A1

公开(公告)日：2010-11-04

申请号：US12434368

申请日：2009-05-01

申请人： Junyi Li ,  Saurabh Tavildar ,  Rajiv Laroia ,  Thomas Richardson

发明人： Junyi Li ,  Saurabh Tavildar ,  Rajiv Laroia ,  Thomas Richardson

IPC分类号： H04B15/00

CPC分类号： H04L1/0045 ,  H04L1/20 ,  H04L1/201 ,  H04L5/0007 ,  H04L5/0033 ,  H04L5/0058

摘要： Aspects relate to mitigating interference in a communication network that does not employ a centralized scheduler. A transmission sent on a subset of resources is evaluated to determine a number of communication pairs that have selected that subset of resources on which to transmit. If there are a large number of communication pairs transmitting on that subset, the transmission is ignored by a receiving device. The number of degrees of freedom that contain energy on the subset is evaluated to determine if an expected number of degrees of freedom that should have energy is met or exceeded. If the expected threshold number is met or exceed, the transmission is decoded by the receiving device, else the transmission is not decoded.

摘要翻译： 方面涉及减轻不采用集中式调度器的通信网络中的干扰。 评估在资源子集上发送的传输，以确定已经选择要发送的资源子集的多个通信对。 如果在该子集上有大量的通信对传输，则传输被接收设备忽略。 评估在子集上含有能量的自由度的数量，以确定是否满足或超过应具有能量的预期自由度数。 如果满足或超过预期阈值数，则传输由接收​​设备解码，否则传输不被解码。

公开(公告)号：US20090109851A1

公开(公告)日：2009-04-30

申请号：US11933042

申请日：2007-10-31

申请人： Junyi Li ,  Rajiv Laroia ,  Sundeep Rangan ,  Thomas Richardson ,  Xinzhou Wu ,  Saurabh Tavildar

发明人： Junyi Li ,  Rajiv Laroia ,  Sundeep Rangan ,  Thomas Richardson ,  Xinzhou Wu ,  Saurabh Tavildar

IPC分类号： H04L12/28

CPC分类号： H04W72/1231 ,  H04W72/1278 ,  H04W84/18 ,  H04W92/18

摘要： Methods and apparatus for use in a wireless communications system in which traffic air link resources may be, and sometimes are, shared are described. Various described methods and apparatus are well suited for use in a peer to peer communications system in which transmission control decisions are made in a decentralized manner. An exemplary peer to peer communications system implements the scheduling of traffic intervals in a distributed manner utilizing connection priority information and interference information. An exemplary peer to peer timing structure includes a user scheduling interval and an associated traffic interval. The user scheduling interval includes a plurality transmission request/request response rounds. By utilizing multiple request/request response rounds, a transmission decision corresponding to a connection to yield in an earlier round can be overridden in a subsequent round, resulting in higher overall traffic throughput in the system.

摘要翻译： 描述用于其中交通空中链路资源可以共享的无线通信系统中的方法和装置。 各种描述的方法和装置非常适合用于以分散方式进行传输控制决定的对等通信系统。 示例性的对等通信系统利用连接优先级信息和干扰信息以分布式方式实现业务间隔的调度。 一种示例性的对等定时结构包括用户调度间隔和相关联的业务间隔。 用户调度间隔包括多个发送请求/请求响应轮。 通过利用多个请求/请求响应轮，可以在随后的一轮中覆盖对应于在较早轮中产生的连接的传输决定，导致系统中更高的总体流量吞吐量。