公开(公告)号：US20110085453A1

公开(公告)日：2011-04-14

申请号：US12578245

申请日：2009-10-13

申请人： Xinzhou Wu ,  Junyi Li ,  Cyril Measson

发明人： Xinzhou Wu ,  Junyi Li ,  Cyril Measson

IPC分类号： H04W72/04 ,  H04L12/26

CPC分类号： H04L5/0048 ,  H04L5/0007 ,  H04L5/0044 ,  H04L5/006 ,  H04L27/2626

摘要： Sets of communications resources, e.g., sets of peer discovery resources, in a peer to peer communications system may be use concurrently by multiple transmitting devices. The communications system supports a plurality of different pilot sequences. Multiple transmitting devices may transmit their signals on the same set of communications resources, but with different pilot sequences. This approach allows receiving devices to distinguish between multiple signal sources, e.g., wireless terminals, using a shared communications resource. A wireless communications device monitors a plurality of different sets of communications resources and selects, e.g., based on received energy levels, a set of communications resources from said plurality of different sets of communications resources to use for communication. The communications device further selects one of a plurality of different pilot sequences to use for said communication and transmits pilot signals using the selected pilot sequence and at least a portion of the selected set of communications resources.

摘要翻译： 通信资源的集合，例如，对等通信系统中的对等体发现资源集合可以由多个发送装置同时使用。 通信系统支持多个不同的导频序列。 多个发射设备可以在相同的一组通信资源上发送它们的信号，但是具有不同的导频序列。 该方法允许接收设备使用共享通信资源来区分多个信号源，例如无线终端。 无线通信设备监视多个不同的通信资源集合，并且例如基于接收到的能量级别选择来自所述多个不同的通信资源集合的一组通信资源以用于通信。 通信设备还选择用于所述通信的多个不同导频序列中的一个，并使用所选择的导频序列和所选择的一组通信资源的至少一部分来发送导频信号。

公开(公告)号：US20120014463A1

公开(公告)日：2012-01-19

申请号：US12835264

申请日：2010-07-13

申请人： Xinzhou Wu ,  Sundar Subramanian ,  Junyi Li

发明人： Xinzhou Wu ,  Sundar Subramanian ,  Junyi Li

IPC分类号： H04L27/28 ,  H04L27/00

CPC分类号： H04L5/003 ,  H04L5/00 ,  H04L5/0007 ,  H04L27/2601 ,  H04W72/1231

摘要： Methods and apparatus for determining, e.g., selecting, communications resources, e.g., tones, to use in a communications system are described. The methods are well suited for use in Orthogonal Frequency Division Multiplexing (OFDM) systems. Devices seeking to transmit information select tones in pairs for use in transmitting the information. Each tone pair includes a tone and the corresponding image tone. By restricting a communications device to select communications frequencies in pairs, the problem of interference and reduced dynamic range at a receiver due to IQ imbalance is reduced, as compared to the case where devices may use a tone independent of the corresponding image tone for transmission purposes, since the path loss from the transmitter to the receiver is likely to be the same for both tones and the transmission power level is controlled by an individual device using both of the tones.

摘要翻译： 描述了用于确定例如选择在通信系统中使用的通信资源，例如音调的方法和装置。 该方法非常适用于正交频分复用（OFDM）系统。 寻求发送信息的设备成对选择音调以用于发送信息。 每个音色对包括一个音调和相应的图像色调。 通过限制通信设备成对地选择通信频率，与设备可以使用独立于对应的图像色调的音调以用于传输目的的情况相比，由于IQ不平衡而导致的接收机处的干扰和减小的动态范围的问题减少了 由于从发射机到接收机的路径损耗对于两个音调都是相同的，并且发射功率电平由使用两个音调的单独设备控制。

公开(公告)号：US08995539B2

公开(公告)日：2015-03-31

申请号：US12835264

申请日：2010-07-13

申请人： Xinzhou Wu ,  Junyi Li ,  Sundar Subramanian

发明人： Xinzhou Wu ,  Junyi Li ,  Sundar Subramanian

IPC分类号： H04K1/10 ,  H04L5/00 ,  H04L27/26 ,  H04W72/12

CPC分类号： H04L5/003 ,  H04L5/00 ,  H04L5/0007 ,  H04L27/2601 ,  H04W72/1231

摘要： Methods and apparatus for determining, e.g., selecting, communications resources, e.g., tones, to use in a communications system are described. The methods are well suited for use in Orthogonal Frequency Division Multiplexing (OFDM) systems. Devices seeking to transmit information select tones in pairs for use in transmitting the information. Each tone pair includes a tone and the corresponding image tone. By restricting a communications device to select communications frequencies in pairs, the problem of interference and reduced dynamic range at a receiver due to IQ imbalance is reduced, as compared to the case where devices may use a tone independent of the corresponding image tone for transmission purposes, since the path loss from the transmitter to the receiver is likely to be the same for both tones and the transmission power level is controlled by an individual device using both of the tones.

摘要翻译： 描述了用于确定例如选择在通信系统中使用的通信资源，例如音调的方法和装置。 该方法非常适用于正交频分复用（OFDM）系统。 寻求发送信息的设备成对选择音调以用于发送信息。 每个音色对包括一个音调和相应的图像色调。 通过限制通信设备成对地选择通信频率，与设备可以使用独立于相应图像色调的音调以用于传输目的的情况相比，由于IQ不平衡而导致的接收机处的干扰和减小的动态范围的问题减少了 由于从发射机到接收机的路径损耗对于两个音调都是相同的，并且发射功率电平由使用两个音调的单独设备控制。

公开(公告)号：US08923910B2

公开(公告)日：2014-12-30

申请号：US12712629

申请日：2010-02-25

申请人： Xinzhou Wu ,  Junyi Li ,  Nilesh Khude ,  Sundar Subramanian

发明人： Xinzhou Wu ,  Junyi Li ,  Nilesh Khude ,  Sundar Subramanian

IPC分类号： H04B7/00 ,  H04W52/34 ,  H04W52/32 ,  H04W52/46

CPC分类号： H04W52/343 ,  H04W52/322 ,  H04W52/46

摘要： A wireless communications device supports a constant transmission power mode of operation and a time varying transmission power mode of operation for transmitting data, e.g., peer discovery data. The device determines an amount of network congestion and switches between the two modes of operation as a function of the determined amount of network congestion. Various described methods and apparatus are well suited for use in a peer to peer ad hoc wireless communications system in which a limited amount of air link resources are available for peer discovery signaling and the same peer discovery resources are, at times, used concurrently by multiple devices. When network congestion is low, the device operates in the constant transmission power mode. When network congestion is high, the device operates in the time varying power mode. Devices sharing a common peer discovery resource in a local area intentionally select different time varying transmission patterns.

摘要翻译： 无线通信设备支持恒定的发送功率操作模式和用于发送数据的时变发送功率操作模式，例如对等体发现数据。 该设备确定网络拥塞量，并根据确定的网络拥塞量来确定两种运营模式之间的切换。 各种描述的方法和装置非常适合用于对等自组织无线通信系统中，其中有限量的空中链路资源可用于对等体发现信令，同时有同样的对等体发现资源由多个 设备。 当网络拥塞低时，设备以恒定的传输功率模式工作。 当网络拥塞较高时，设备在时变功率模式下工作。 在本地区共享公共对等体发现资源的设备有意选择不同的时变传输模式。

公开(公告)号：US20130210460A1

公开(公告)日：2013-08-15

申请号：US13570109

申请日：2012-08-08

申请人： Sundar Subramanian ,  Xinzhou Wu ,  Junyi Li

发明人： Sundar Subramanian ,  Xinzhou Wu ,  Junyi Li

IPC分类号： H04W4/02

CPC分类号： H04W4/02 ,  B61L15/0027 ,  B61L25/025 ,  B61L29/246 ,  B61L29/28 ,  B61L2205/04 ,  G08G1/093 ,  G08G1/163 ,  G08G1/166 ,  H04W4/021 ,  H04W4/046 ,  H04W4/80

摘要： Safety message monitoring operations and/or safety message transmission operations are controlled for a mobile wireless communications device. The periodicity with regard to safety message monitoring and/or safety message transmissions is varied based on the environment of the mobile wireless device. The transmission power level with regard to safety message transmissions is varied based on the environment of the mobile wireless device. In some embodiments, safety message monitoring and transmission operations are disabled when the mobile device is determined to be inside a building or inside a vehicle. In some embodiments, safety message monitoring rate and safety message transmission rate is varied as a function of proximity to vehicular traffic and/or the level of detected vehicular traffic. In some embodiments, safety message transmission power level is varied as a function of proximity to vehicular traffic and/or the level of detected vehicular traffic.

摘要翻译： 控制移动无线通信设备的安全消息监视操作和/或安全消息传输操作。 基于移动无线设备的环境来改变关于安全消息监视和/或安全消息传输的周期性。 关于安全消息传输的传输功率电平根据移动无线设备的环境而变化。 在一些实施例中，当确定移动设备在建筑物内或车辆内部时，安全消息监视和传输操作被禁用。 在一些实施例中，安全消息监视速率和安全消息传输速率作为与车辆交通的接近度和/或检测到的车辆交通的水平的函数而变化。 在一些实施例中，安全消息传输功率电平作为与车辆交通的接近度和/或检测到的车辆交通的水平而变化。

公开(公告)号：US20120008571A1

公开(公告)日：2012-01-12

申请号：US12832808

申请日：2010-07-08

申请人： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian ,  Nilesh Khude

发明人： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian ,  Nilesh Khude

IPC分类号： H04W72/12

CPC分类号： H04W74/0825 ,  H04W76/11 ,  H04W84/18

摘要： A method of operating a wireless device includes selecting a connection identifier with a first node, receiving a scheduling control signal on a resource associated with the connection identifier, and determining a presence of a second node transmitting on the same resource associated with the connection identifier based on the received scheduling control signal.

摘要翻译： 一种操作无线设备的方法包括：选择与第一节点的连接标识符，在与所述连接标识符相关联的资源上接收调度控制信号，以及确定在与所述连接标识符相关联的相同资源上发送的第二节点的存在 对接收到的调度控制信号。

公开(公告)号：US09048960B2

公开(公告)日：2015-06-02

申请号：US13588869

申请日：2012-08-17

申请人： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian

发明人： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian

IPC分类号： H04B7/00 ,  H04H20/59 ,  H04W4/04

CPC分类号： H04H20/59 ,  H04W4/046

摘要： Various embodiments, relate to a communications system in which communications devices of users and communications devices of vehicular systems communicate safety messages through a cellular communications band or the DSRC (Dedicated short-range communications) vehicular communications band or a combination of both. Various methods and apparatus are directed to communicating safety messages between vehicles and pedestrians/cyclists through the use of a cell phone, thus improving the impact of vehicular communications. In some embodiments, at least some cell phones in a communications system includes both a DSRC communications capability and a cellular communications capability.

摘要翻译： 各种实施例涉及通信系统，其中用户的通信设备和车辆系统的通信设备通过蜂窝通信频带或DSRC（专用短距离通信）车辆通信频带或两者的组合来传送安全消息。 各种方法和装置旨在通过使用蜂窝电话在车辆和行人/骑自行车者之间传递安全信息，从而改善车辆通信的影响。 在一些实施例中，通信系统中的至少一些蜂窝电话包括DSRC通信能力和蜂窝通信能力。

公开(公告)号：US08521208B2

公开(公告)日：2013-08-27

申请号：US12835278

申请日：2010-07-13

申请人： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian

发明人： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian

IPC分类号： H04B7/10

CPC分类号： H04W52/241 ,  H04W52/243 ,  H04W52/38 ,  H04W52/383

摘要： A method of operating a wireless device is provided in which an interference level on a resource is determined. In addition, a signal is transmitted on the resource with a first power when the interference level is low. The first power is such that the signal is received with a first SNR. Furthermore, the signal is transmitted on the resource with a second power when the interference level is high. The second power is such that the signal is received with a second SNR less than the first SNR.

摘要翻译： 提供一种操作无线设备的方法，其中确定资源上的干扰等级。 此外，当干扰电平低时，以资源发送信号以第一功率。 第一功率使得以第一SNR接收信号。 此外，当干扰电平较高时，以第二功率在资源上发送信号。 第二功率使得以小于第一SNR的第二SNR接收信号。

公开(公告)号：US20110205887A1

公开(公告)日：2011-08-25

申请号：US12712629

申请日：2010-02-25

申请人： Xinzhou Wu ,  Junyi Li ,  Nilesh Khude ,  Sundar Subramanian

发明人： Xinzhou Wu ,  Junyi Li ,  Nilesh Khude ,  Sundar Subramanian

IPC分类号： H04B7/00 ,  H04L12/56

CPC分类号： H04W52/343 ,  H04W52/322 ,  H04W52/46

摘要： A wireless communications device supports a constant transmission power mode of operation and a time varying transmission power mode of operation for transmitting data, e.g., peer discovery data. The device determines an amount of network congestion and switches between the two modes of operation as a function of the determined amount of network congestion. Various described methods and apparatus are well suited for use in a peer to peer ad hoc wireless communications system in which a limited amount of air link resources are available for peer discovery signaling and the same peer discovery resources are, at times, used concurrently by multiple devices. When network congestion is low, the device operates in the constant transmission power mode. When network congestion is high, the device operates in the time varying power mode. Devices sharing a common peer discovery resource in a local area intentionally select different time varying transmission patterns.

摘要翻译： 无线通信设备支持恒定的发送功率操作模式和用于发送数据的时变发送功率操作模式，例如对等体发现数据。 该设备确定网络拥塞量，并根据确定的网络拥塞量来确定两种运营模式之间的切换。 各种描述的方法和装置非常适合用于对等自组织无线通信系统中，其中有限量的空中链路资源可用于对等体发现信令，同时有同样的对等体发现资源由多个 设备。 当网络拥塞低时，设备以恒定的传输功率模式工作。 当网络拥塞较高时，设备在时变功率模式下工作。 在本地区共享公共对等体发现资源的设备有意选择不同的时变传输模式。

公开(公告)号：US10098154B2

公开(公告)日：2018-10-09

申请号：US12832808

申请日：2010-07-08

申请人： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian ,  Nilesh Khude

发明人： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian ,  Nilesh Khude

IPC分类号： H04W74/08 ,  H04W76/11 ,  H04W76/02 ,  H04W84/18

摘要： A method of operating a wireless device includes selecting a connection identifier with a first node, receiving a scheduling control signal on a resource associated with the connection identifier, and determining a presence of a second node transmitting on the same resource associated with the connection identifier based on the received scheduling control signal.