公开(公告)号：US08565169B2

公开(公告)日：2013-10-22

申请号：US12686062

申请日：2010-01-12

申请人： Saurabh Tavildar ,  Ashwin Sampath ,  Junyi Li

发明人： Saurabh Tavildar ,  Ashwin Sampath ,  Junyi Li

IPC分类号： H04W4/00 ,  H04W56/00

CPC分类号： H04W56/0015 ,  Y02D70/1242 ,  Y02D70/1262 ,  Y02D70/142 ,  Y02D70/164 ,  Y02D70/22

摘要： Various methods and apparatus are directed to achieving timing synchronization and propagating timing information pertaining to an external, e.g., non Wi-Fi, timing signal source. In some embodiments, a mobile communications device receives and processes a timing signal, e.g., a first Wi-Fi beacon, which is propagating timing information about an external timing signal from a device which directly received the external timing signal. Thus, a mobile wireless communications device achieves timing synchronization with respect to an external timing signal which it is unable to receive directly. In various embodiments, the mobile communications device may, and sometimes does, further propagate the timing information about the external timing signal, e.g., via a second Wi-Fi beacon signal which it generates and transmits. Synchronization with respect to an external signal source facilitates longer sleep states and decreased power consumption.

摘要翻译： 各种方法和装置旨在实现与外部例如非Wi-Fi定时信号源有关的定时同步和传播定时信息。 在一些实施例中，移动通信设备接收并处理定时信号，例如，第一Wi-Fi信标，其正在从直接接收到外部定时信号的设备传播关于外部定时信号的定时信息。 因此，移动无线通信设备相对于不能直接接收的外部定时信号实现定时同步。 在各种实施例中，移动通信设备可以并且有时也可以例如经由其产生和发送的第二Wi-Fi信标信号进一步传播关于外部定时信号的定时信息。 相对于外部信号源的同步有助于延长睡眠状态和降低功耗。

公开(公告)号：US08340044B2

公开(公告)日：2012-12-25

申请号：US12146972

申请日：2008-06-26

申请人： Rajiv Laroia ,  Junyi Li ,  Xinzhou Wu ,  Saurabh Tavildar

发明人： Rajiv Laroia ,  Junyi Li ,  Xinzhou Wu ,  Saurabh Tavildar

IPC分类号： H04W4/00

CPC分类号： H04W72/02 ,  H04W48/12 ,  H04W68/00

摘要： A first device is configured to select and utilize a connection identifier (CID) for a peer-to-peer communication connection between the first device and a second device in a wireless communications network. The CID is selected from a predetermined set of a plurality of CIDs. Prior to selecting the connection identifier, the first device monitors a CID broadcast channel to determine whether the CID is being utilized by other nearby connections. If it is determined that the CID is being utilized by another connection in the proximity, a different (unused) CID is selected. A transmission request is transmitted to the second device using a first transmission resource unit within a traffic management channel slot, the first transmission resource unit being determined as a function of the selected CID. The first device transmits traffic data to the second device in a traffic channel slot corresponding to the traffic management channel slot.

公开(公告)号：US20120269250A1

公开(公告)日：2012-10-25

申请号：US13092819

申请日：2011-04-22

申请人： Junyi Li ,  Eduardo S. Esteves ,  Saurabh Tavildar ,  Matthew S. Grob

发明人： Junyi Li ,  Eduardo S. Esteves ,  Saurabh Tavildar ,  Matthew S. Grob

IPC分类号： H04L27/28 ,  H04W24/00

CPC分类号： H04W76/026 ,  H04L5/0053 ,  H04W8/005 ,  H04W76/16 ,  H04W92/18

摘要： A method of wireless communication of a wireless device includes receiving a signal indicating WWAN resources that can be utilized for communicating peer discovery signals. In addition, the method includes communicating an OFDM peer discovery signal in the WWAN resources. A method of wireless communication of a base station includes transmitting a signal to a wireless device indicating WWAN resources dedicated for a silence interval that can be utilized for communicating peer discovery signals. The WWAN resources dedicated for a silence interval include a first subset of resources and a second subset of resources. The method further includes measuring noise in the first subset of resources and refraining from measuring noise in the second subset of resources.

摘要翻译： 一种无线设备的无线通信方法包括接收指示可用于传送对等体发现信号的WWAN资源的信号。 另外，该方法包括在WWAN资源中传送OFDM对等体发现信号。 基站的无线通信的方法包括向无线设备发送信号，指示专用于可用于通信对等体发现信号的静默间隔的WWAN资源。 专用于静默间隔的WWAN资源包括资源的第一子集和资源的第二子集。 该方法还包括测量资源的第一子集中的噪声并且避免在第二资源子集中测量噪声。

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：US08144636B2

公开(公告)日：2012-03-27

申请号：US12168679

申请日：2008-07-07

申请人： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Xinzhou Wu

发明人： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Xinzhou Wu

IPC分类号： H04B7/00

CPC分类号： H04L1/0002 ,  H04L1/0025 ,  Y02D70/10 ,  Y02D70/20

摘要： An improved mechanism is provided that facilitates transmission of small packets within an ad hoc peer-to-peer network. A small packet is identified to a receiver within a control channel so that its lower power can be considered in an interference management protocol implemented among local peer devices. In a traffic slot, a transmitter voluntarily backs down on the transmitter power as a smaller packet will require much lower signal-to-noise ratio. This will improve the signal energy per bit per noise power density for the transmission as well as minimize the interference caused to other wireless communications happening in the same spectrum.

公开(公告)号：US08140003B2

公开(公告)日：2012-03-20

申请号：US12178231

申请日：2008-07-23

申请人： Rajiv Laroia ,  Thomas Richardson ,  Junyi Li ,  Xinzhou Wu ,  Saurabh Tavildar ,  Vincent D. Park

发明人： Rajiv Laroia ,  Thomas Richardson ,  Junyi Li ,  Xinzhou Wu ,  Saurabh Tavildar ,  Vincent D. Park

IPC分类号： H04B7/15

CPC分类号： H04W40/12 ,  Y02D70/22 ,  Y02D70/34

摘要： Methods and apparatus for wireless communications in networks, e.g., regional ad hoc peer to peer networks, are described. A communications node, e.g., a third node monitors for wireless communications between other peer communication nodes, e.g., a first node and a second node, in its local vicinity. The third node determines from the monitored wireless communication an indication of link quality corresponding to a communication link between the communication nodes which are communicating or seeking to establish a communications link. The third node generates an estimate of a link quality for a communications link between itself and the first node. Based on the indication of link quality and generated estimate of link quality, the third node decides whether or not to send a signal indicating availability to relay communication between the first and second nodes. The third node, when acting as an intermediary node after indicating its availability to so act, may receive traffic data e.g., user data communicated in a peer to peer traffic segment, from the first node. The third node communicates the received traffic data to the second node by transmitting the traffic data.

摘要翻译： 描述了用于网络中的无线通信的方法和装置，例如区域自组织对等网络。 通信节点，例如第三节点监视在其本地附近的其他对等通信节点（例如，第一节点和第二节点）之间的无线通信。 第三节点从监视的无线通信确定与正在通信或寻求建立通信链路的通信节点之间的通信链路相对应的链路质量的指示。 第三节点产生对于其与第一节点之间的通信链路的链路质量的估计。 基于链路质量的指示和链路质量的产生估计，第三节点决定是否发送指示第一和第二节点之间的中继通信的可用性的信号。 第三节点在指示其可用性之后充当中间节点时可以从第一节点接收业务数据，例如在对等业务段中传送的用户数据。 第三节点通过发送业务数据将接收到的业务数据传送到第二节点。

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：US20110250916A1

公开(公告)日：2011-10-13

申请号：US12756660

申请日：2010-04-08

申请人： Junyi Li ,  Saurabh Tavildar ,  Aleksandar Jovicic ,  Hongseok Kim

发明人： Junyi Li ,  Saurabh Tavildar ,  Aleksandar Jovicic ,  Hongseok Kim

IPC分类号： H04W72/04

CPC分类号： H04W28/18 ,  H04W16/14 ,  H04W72/0406

摘要： Methods and apparatus for determining band availability and/or allocating one or more frequency bands to a communications device for wireless communications are described. In different locations and/or at different times different frequency bands, e.g., band corresponding to unused TV channels, may be available for allocation. Various described methods and apparatus are well suited for supporting local peer to peer networks in an environment in which a plurality of different technologies are supported. A centralized control device determines and allocates a frequency band to a wireless terminal for use at a given location and at a given time, e.g., for peer to peer communications using a particular technology supported by the wireless terminal. The centralized control device uses database information and information received from a plurality of wireless terminals in making frequency band allocation decisions, performing load balancing, and/or performing interference management.

摘要翻译： 描述了用于确定频带可用性和/或将一个或多个频带分配给用于无线通信的通信设备的方法和装置。 在不同的位置和/或在不同的时间，不同的频带，例如对应于未使用的电视频道的频带，可用于分配。 各种描述的方法和装置非常适合于在支持多种不同技术的环境中支持本地对等网络。 集中控制装置确定并分配给无线终端的频带，以便在给定位置和给定时间使用，例如用于由无线终端支持的特定技术的对等通信。 集中控制装置使用数据库信息和从多个无线终端接收的信息进行频带分配决定，执行负载平衡，和/或执行干扰管理。

公开(公告)号：US20110149799A1

公开(公告)日：2011-06-23

申请号：US12645746

申请日：2009-12-23

申请人： Xinzhou Wu ,  Junyi Li ,  Aleksandar Jovicic ,  Sanjay Shakkottai ,  Saurabh Tavildar

发明人： Xinzhou Wu ,  Junyi Li ,  Aleksandar Jovicic ,  Sanjay Shakkottai ,  Saurabh Tavildar

IPC分类号： H04L12/28

CPC分类号： H04W8/005 ,  H04W84/18

摘要： Methods and apparatus for supporting multi-hop peer discovery in peer-to-peer wireless networks are disclosed. One method supports multi-hop peer discovery using a first peer having a first unique identification code. The method includes decoding a second peer discovery signal to obtain a second unique identification code and a second local identification code of a second peer received during a peer-to-peer discovery channel, determining whether to select the second peer based on a predetermined criterion; and transmitting a first peer discovery signal having the first unique identification code, the second local identification code and a hop count when the predetermined criterion is satisfied.

摘要翻译： 公开了在对等无线网络中支持多跳对等体发现的方法和装置。 一种方法支持使用具有第一唯一识别码的第一对等体的多跳对等体发现。 该方法包括解码第二对等体发现信号以获得在对等发现信道期间接收的第二对等体的第二唯一标识码和第二本地标识码，基于预定准则确定是否选择第二对等体; 以及当满足所述预定标准时，发送具有所述第一唯一识别码，所述第二本地识别码和跳数的第一对等体发现信号。