公开(公告)号：US08483196B2

公开(公告)日：2013-07-09

申请号：US12722595

申请日：2010-03-12

申请人： Hua Wang ,  Sanjay Shakkottai ,  Xinzhou Wu ,  Junyi Li ,  Aleksandar Jovicic

发明人： Hua Wang ,  Sanjay Shakkottai ,  Xinzhou Wu ,  Junyi Li ,  Aleksandar Jovicic

IPC分类号： H04W4/00

CPC分类号： H04W84/20 ,  H04W56/0015 ,  H04W92/10

摘要： Methods and apparatus related to supporting rapid synchronization between groups of wireless communications devices are described. Described methods and apparatus are well suited for use in peer to peer wireless communications systems in which a plurality of ad hoc peer to peer networks may be formed, each ad hoc network operating with its own notion of time. As two groups of devices, having different notions of time, come within proximity of one another, a wireless communications device of a first group detects the presence of a member of a second group. The wireless device determines that network timing re-synchronization is to be performed by one of the first and second groups and transmits a re-synchronization alert signal on a dedicated resource. Subsequently, the wireless device transmits a timing synchronization signal in accordance with new timing. Intended devices, which detect the alert signal and timing synchronization signal, adjust their internal timing.

摘要翻译： 描述了支持无线通信设备组之间的快速同步的方法和装置。 描述的方法和装置非常适合用于可以形成多个自组织对等网络的对等无线通信系统，每个自组织网络以其自己的时间概念运行。 作为具有不同时间概念的两组设备彼此接近，第一组的无线通信设备检测第二组的成员的存在。 无线设备确定网络定时重新同步将由第一组和第二组之一执行，并在专用资源上发送重新同步报警信号。 随后，无线设备根据新的定时发送定时同步信号。 用于检测报警信号和定时同步信号的设备调整其内部时序。

公开(公告)号：US20130100947A9

公开(公告)日：2013-04-25

申请号：US12832758

申请日：2010-07-08

申请人： Hua Wang ,  Xinzhou Wu ,  Junyi Li ,  Aleksandar Jovicic

发明人： Hua Wang ,  Xinzhou Wu ,  Junyi Li ,  Aleksandar Jovicic

IPC分类号： H04J3/06

CPC分类号： H04W56/002

摘要： A wireless terminal detects timing signals from different local timing signal sources. The wireless terminal selects from the plurality of detected timing signal sources two timing signal sources in accordance with a predetermined timing signal source priority ordering. In some embodiments, the wireless terminal intentionally selects two timing signal sources which are not synchronized with respect to one another. The wireless terminal determines a first set of peer communications time intervals corresponding to a first selected timing signal source and a second set of peer communications time intervals corresponding to a second selected timing signal source. The wireless terminal transmits a peer to peer signal, e.g., a peer discovery signal, during at least one of the first set of peer communications time intervals. The wireless terminal transmits a peer to peer signal, e.g., a peer discovery signal, during at least one of the second set of peer communications time intervals.

摘要翻译： 无线终端检测来自不同本地定时信号源的定时信号。 无线终端根据预定的定时信号源优先级排序从多个检测到的定时信号源中选择两个定时信号源。 在一些实施例中，无线终端有意地选择两个相对于彼此不同步的定时信号源。 无线终端确定对应于第一选定定时信号源的第一组对等通信时间间隔和对应于第二选定定时信号源的对等通信时间间隔集合。 在第一组对等通信时间间隔中的至少一个期间，无线终端发送对等信号，例如对等体发现信号。 在第二组对等通信时间间隔中的至少一个期间，无线终端发送对等信号，例如对等体发现信号。

公开(公告)号：US20110222515A1

公开(公告)日：2011-09-15

申请号：US12722595

申请日：2010-03-12

申请人： Hua Wang ,  Sanjay Shakkottai ,  Xinzhou Wu ,  Junyi Li ,  Aleksandar Jovicic

发明人： Hua Wang ,  Sanjay Shakkottai ,  Xinzhou Wu ,  Junyi Li ,  Aleksandar Jovicic

IPC分类号： H04W4/00 ,  H04J3/06

CPC分类号： H04W84/20 ,  H04W56/0015 ,  H04W92/10

摘要： Methods and apparatus related to supporting rapid synchronization between groups of wireless communications devices are described. Described methods and apparatus are well suited for use in peer to peer wireless communications systems in which a plurality of ad hoc peer to peer networks may be formed, each ad hoc network operating with its own notion of time. As two groups of devices, having different notions of time, come within proximity of one another, a wireless communications device of a first group detects the presence of a member of a second group. The wireless device determines that network timing re-synchronization is to be performed by one of the first and second groups and transmits a re-synchronization alert signal on a dedicated resource. Subsequently, the wireless device transmits a timing synchronization signal in accordance with new timing. Intended devices, which detect the alert signal and timing synchronization signal, adjust their internal timing.

摘要翻译： 描述了支持无线通信设备组之间的快速同步的方法和装置。 描述的方法和装置非常适合用于可以形成多个自组织对等网络的对等无线通信系统，每个自组织网络以其自己的时间概念运行。 作为具有不同时间概念的两组设备彼此接近，第一组的无线通信设备检测第二组的成员的存在。 无线设备确定网络定时重新同步将由第一组和第二组之一执行，并在专用资源上发送重新同步报警信号。 随后，无线设备根据新的定时发送定时同步信号。 用于检测报警信号和定时同步信号的设备调整其内部时序。

公开(公告)号：US20100250673A1

公开(公告)日：2010-09-30

申请号：US12413877

申请日：2009-03-30

申请人： Rajiv Laroia ,  Junyi Li ,  Vincent D. Park ,  Ying Wang ,  Aleksandar Jovicic

发明人： Rajiv Laroia ,  Junyi Li ,  Vincent D. Park ,  Ying Wang ,  Aleksandar Jovicic

IPC分类号： G06F15/16

CPC分类号： H04W4/02 ,  H04L67/16 ,  H04W4/20 ,  H04W4/21 ,  H04W8/005 ,  H04W76/14 ,  H04W84/22 ,  H04W88/06

摘要： A first wireless communications device includes a wide area network (WAN) interface and a peer to peer interface. The first device discovers the presence of a second wireless communications device via a peer discovery signal, received via its peer to peer interface. The second device has been transmitting, e.g., periodically, certain information, e.g., its location and/or shopping preferences, to a node within the WAN. The detected first signal triggers an application alert in the first device. The first device recovers past information about the second device through a second signal received via its WAN interface. The first device uses information communicated in the first signal, e.g., device identifier information, and information communicated in the second signal, e.g., past location and/or shopping information, to generate a targeted message for the second device. The first device communicates the targeted message via its peer to peer interface in a peer to peer traffic channel.

摘要翻译： 第一无线通信设备包括广域网（WAN）接口和对等接口。 第一设备经由其对等接口接收的对等体发现信号发现第二无线通信设备的存在。 第二设备已经例如周期性地向WAN内的节点发送某些信息，例如其位置和/或购物偏好。 所检测到的第一信号在第一设备中触发应用警报。 第一个设备通过其WAN接口接收的第二个信号恢复关于第二个设备的信息。 第一设备使用在第一信号中传送的信息，例如，设备标识符信息，以及在第二信号中传送的信息，例如过去位置和/或购物信息，以产生用于第二设备的目标消息。 第一设备通过对等业务信道中的对等接口对目标消息进行通信。

公开(公告)号：US20100189188A1

公开(公告)日：2010-07-29

申请号：US12360907

申请日：2009-01-28

申请人： Junyi Li ,  Vladimir Parizhsky ,  Frank A. Lane ,  Aleksandar Jovicic ,  Ying Wang

发明人： Junyi Li ,  Vladimir Parizhsky ,  Frank A. Lane ,  Aleksandar Jovicic ,  Ying Wang

IPC分类号： H04L25/10 ,  H04L27/28

CPC分类号： H04L27/2647 ,  H03G3/3078

摘要： Techniques for performing automatic gain control (AGC) at a receiver are described. The receiver may receive an OFDM-based symbol composed of a cyclic prefix and a useful portion. The receiver may scale the OFDM-based symbol with an initial receiver gain, adjust the initial receiver gain based on the cyclic prefix, apply the adjusted receiver gain prior to the useful portion, and process the useful portion to recover at least one signal sent by at least one transmitter. The receiver may select the initial receiver gain, e.g., based on a predicted received power level for the at least one transmitter, a pattern of different receiver gains, etc. The receiver may apply the initial receiver gain at the start of the OFDM-based symbol. The receiver may measure the power of a set of samples in the cyclic prefix and may adjust the receiver gain based on the measured power and a target power.

摘要翻译： 描述了在接收机处执行自动增益控制（AGC）的技术。 接收机可以接收由循环前缀和有用部分组成的基于OFDM的符号。 接收机可以利用初始接收机增益来缩放基于OFDM的符号，基于循环前缀调整初始接收机增益，在有用部分之前应用经调整的接收机增益，并处理有用部分以恢复至少一个由 至少一个发射机。 接收机可以例如基于至少一个发射机的预测接收功率电平，不同接收机增益的模式等来选择初始接收机增益。接收机可以在基于OFDM的开始处应用初始接收机增益 符号。 接收机可以测量循环前缀中的一组样本的功率，并且可以基于测量的功率和目标功率来调整接收机增益。

公开(公告)号：US20090017762A1

公开(公告)日：2009-01-15

申请号：US12164455

申请日：2008-06-30

申请人： Aleksandar Jovicic ,  Junyi Li

发明人： Aleksandar Jovicic ,  Junyi Li

IPC分类号： H04B15/00

CPC分类号： H04W72/082 ,  H04B1/71072 ,  H04W28/22 ,  H04W76/20

摘要： In an ad hoc peer-to-peer communication network between wireless devices, a low priory first receiver device calculates and provides three transmission rates to its corresponding first transmitter device to allow higher priority devices to concurrently use a shared frequency spectrum. The first receiver device may wirelessly receive a first pilot signal from the first transmitter device and a second pilot signal from a second transmitter device. The second pilot signal indicating that the second transmitter device intends to transmit a second traffic signal that will interfere with the first traffic signal. The first receiver device then determines 1) a first transmission rate as a function of the second pilot signal, 2) a second transmission rate as a function of the first and second pilot signals, and 3) a third transmission rate as a function of the first pilot signal. The three transmission rates are then sent to the first transmitter device.

摘要翻译： 在无线设备之间的专用点对点通信网络中，低级别第一接收机设备计算并向其对应的第一发射机设备提供三个传输速率，以允许较高优先级的设备同时使用共享频谱。 第一接收机设备可以从第一发射机设备无线地接收第一导频信号和来自第二发射机设备的第二导频信号。 所述第二导频信号指示所述第二发射机设备旨在发送将干扰所述第一业务信号的第二业务信号。 第一接收机设备然后确定1）作为第二导频信号的函数的第一传输速率，2）作为第一和第二导频信号的函数的第二传输速率，以及3）作为第二导频信号的函数的第三传输速率 第一个导频信号。 然后将三个传输速率发送到第一发射机设备。

公开(公告)号：US09521680B2

公开(公告)日：2016-12-13

申请号：US12164455

申请日：2008-06-30

申请人： Aleksandar Jovicic ,  Junyi Li

发明人： Aleksandar Jovicic ,  Junyi Li

IPC分类号： H04W72/08 ,  H04B1/7107 ,  H04W28/22 ,  H04W76/04

CPC分类号： H04W72/082 ,  H04B1/71072 ,  H04W28/22 ,  H04W76/20

摘要： In an ad hoc peer-to-peer communication network between wireless devices, a low priory first receiver device calculates and provides three transmission rates to its corresponding first transmitter device to allow higher priority devices to concurrently use a shared frequency spectrum. The first receiver device may wirelessly receive a first pilot signal from the first transmitter device and a second pilot signal from a second transmitter device. The second pilot signal indicating that the second transmitter device intends to transmit a second traffic signal that will interfere with the first traffic signal. The first receiver device then determines 1) a first transmission rate as a function of the second pilot signal, 2) a second transmission rate as a function of the first and second pilot signals, and 3) a third transmission rate as a function of the first pilot signal. The three transmission rates are then sent to the first transmitter device.

摘要翻译： 在无线设备之间的专用点对点通信网络中，低级别第一接收机设备计算并向其对应的第一发射机设备提供三个传输速率，以允许较高优先级的设备同时使用共享频谱。 第一接收机设备可以从第一发射机设备无线地接收第一导频信号和来自第二发射机设备的第二导频信号。 所述第二导频信号指示所述第二发射机设备旨在发送将干扰所述第一业务信号的第二业务信号。 第一接收机设备然后确定1）作为第二导频信号的函数的第一传输速率，2）作为第一和第二导频信号的函数的第二传输速率，以及3）作为第二导频信号的函数的第三传输速率 第一个导频信号。 然后将三个传输速率发送到第一发射机设备。

公开(公告)号：US20120191966A1

公开(公告)日：2012-07-26

申请号：US13013286

申请日：2011-01-25

申请人： Aleksandar Jovicic ,  Junyi Li

发明人： Aleksandar Jovicic ,  Junyi Li

IPC分类号： G06F1/24

CPC分类号： H04W8/005 ,  H04M1/72569 ,  H04W52/0251 ,  H04W84/18 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/164

摘要： A method of operating a wireless device includes adjusting at least one duty cycle at which peer discovery signals are sent or received based on environmental information of an environment of the wireless device. In addition, the method includes sending or receiving the peer discovery signals in time based on the at least one duty cycle.

摘要翻译： 操作无线设备的方法包括基于无线设备的环境的环境信息来调整发送或接收对等体发现信号的至少一个占空比。 此外，该方法包括基于至少一个占空比在时间上发送或接收对等体发现信号。

公开(公告)号：US08082303B2

公开(公告)日：2011-12-20

申请号：US12413877

申请日：2009-03-30

申请人： Rajiv Laroia ,  Junyi Li ,  Vincent D. Park ,  Ying Wang ,  Aleksandar Jovicic

发明人： Rajiv Laroia ,  Junyi Li ,  Vincent D. Park ,  Ying Wang ,  Aleksandar Jovicic

IPC分类号： G06F15/173

CPC分类号： H04W4/02 ,  H04L67/16 ,  H04W4/20 ,  H04W4/21 ,  H04W8/005 ,  H04W76/14 ,  H04W84/22 ,  H04W88/06

摘要： A first wireless communications device includes a wide area network (WAN) interface and a peer to peer interface. The first device discovers the presence of a second wireless communications device via a peer discovery signal, received via its peer to peer interface. The second device has been transmitting, e.g., periodically, certain information, e.g., its location and/or shopping preferences, to a node within the WAN. The detected first signal triggers an application alert in the first device. The first device recovers past information about the second device through a second signal received via its WAN interface. The first device uses information communicated in the first signal, e.g., device identifier information, and information communicated in the second signal, e.g., past location and/or shopping information, to generate a targeted message for the second device. The first device communicates the targeted message via its peer to peer interface in a peer to peer traffic channel.

摘要翻译： 第一无线通信设备包括广域网（WAN）接口和对等接口。 第一设备经由其对等接口接收的对等体发现信号发现第二无线通信设备的存在。 第二设备已经例如周期性地向WAN内的节点发送某些信息，例如其位置和/或购物偏好。 所检测到的第一信号在第一设备中触发应用警报。 第一个设备通过其WAN接口接收的第二个信号恢复关于第二个设备的信息。 第一设备使用在第一信号中传送的信息，例如，设备标识符信息，以及在第二信号中传送的信息，例如过去位置和/或购物信息，以产生用于第二设备的目标消息。 第一设备通过对等业务信道中的对等接口对目标消息进行通信。

公开(公告)号：US08078110B2

公开(公告)日：2011-12-13

申请号：US12168721

申请日：2008-07-07

申请人： Junyi Li ,  Xinzhou Wu ,  Rajiv Laroia ,  Aleksandar Jovicic

发明人： Junyi Li ,  Xinzhou Wu ,  Rajiv Laroia ,  Aleksandar Jovicic

IPC分类号： H04B1/00

CPC分类号： H04B7/086 ,  H04W72/0406 ,  H04W72/046 ,  H04W72/08 ,  H04W84/18

摘要： One feature provides for establishing an ad hoc peer-to-peer network over an existing channel allocation for another network. To mitigate interference between multiple peer-to-peer devices, a plurality of receiver chains in a receiver device may be configured with beamforming coefficients so as to focus reception in the direction of an intended signal from a transmitter device while minimizing reception from other directions. Similarly, the receiver device may also use a plurality of antennas and a transmitter chain to beamform in the direction of the transmitter device, thereby focusing its transmission toward the transmitter device. The receiver device may also notify nearby devices that it is employing a plurality of receive antennas. This information can be used by the nearby devices to more intelligently perform transmitter yielding. By utilizing beamforming information to make the transmitter and/or receiver yielding decision, better interference mitigation may be achieved.

摘要翻译： 一个特征提供了通过用于另一网络的现有信道分配来建立自组织对等网络。 为了减轻多个对等设备之间的干扰，接收机设备中的多个接收器链可以被配置成具有波束成形系数，以便在来自发射机设备的预期信号的方向上聚焦接收，同时最小化从其他方向的接收。 类似地，接收机设备还可以使用多个天线和发射机链在发射机设备的方向上波束成形，从而将其传输集中到发射机设备。 接收机设备还可以通知附近的设备它正在采用多个接收天线。 该信息可被附近的设备用于更智能地执行发射机的收发。 通过利用波束成形信息来使发射机和/或接收机产生决定，可以实现更好的干扰减轻。