公开(公告)号：US09048960B2

公开(公告)日：2015-06-02

申请号：US13588869

申请日：2012-08-17

Applicant: Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian

Inventor： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian

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

CPC classification number: H04H20/59 ,  H04W4/046

Abstract: 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.

Abstract translation: 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：US08630307B2

公开(公告)日：2014-01-14

申请号：US13231417

申请日：2011-09-13

Applicant: Xinzhou Wu ,  Thomas J. Richardson ,  Junyi Li ,  Sundar Subramanian ,  Nilesh Khude

Inventor： Xinzhou Wu ,  Thomas J. Richardson ,  Junyi Li ,  Sundar Subramanian ,  Nilesh Khude

IPC: H04L12/413 ,  G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26

CPC classification number: H04W28/0289 ,  H04W74/08 ,  H04W84/18

Abstract: Methods and apparatus for allocating traffic contention resource units in a wireless communications system in which decisions are made in a distributed manner are described. A wireless communications device, corresponding to a link, self allocates resource units for traffic contention. Decisions regarding initially acquiring resources, relinquishing acquired resources, and/or acquiring additional resources for traffic contention are based on detected levels of network congestion and/or detected changes in network congestion. A wireless communications device detects a level of network congestion and determines a number of resource units to acquire for traffic contention based on the detected level of network congestion.

Abstract translation: 描述在以分布式方式进行决定的无线通信系统中分配业务竞争资源单元的方法和装置。 对应于链路的无线通信设备自行分配用于流量争用的资源单元。 关于初始获取资源，放弃获得的资源和/或获取用于流量争用的额外资源的决定基于网络拥塞的检测水平和/或检测到的网络拥塞变化。 无线通信设备检测网络拥塞程度，并根据检测到的网络拥塞水平，确定获取用于流量争用的资源单元数量。

公开(公告)号：US20130294262A1

公开(公告)日：2013-11-07

申请号：US13464857

申请日：2012-05-04

Applicant: Jubin Jose ,  Sundar Subramanian ,  Xinzhou Wu ,  Thomas Joseph Richardson

Inventor： Jubin Jose ,  Sundar Subramanian ,  Xinzhou Wu ,  Thomas Joseph Richardson

IPC: H04W24/00

CPC classification number: H04W74/08 ,  H04L1/0003 ,  H04L1/0007 ,  H04L1/0009 ,  H04L2001/0093 ,  H04W28/06 ,  H04W36/0088 ,  H04W72/02 ,  H04W84/12 ,  H04W92/18

Abstract: A wireless communications device operates in a system where communications resources may be used by multiple devices concurrently. A device, with an acquired set of recurring time intervals, selects, e.g., pseudo-randomly, an interval or intervals to be used as a combined data transmission and channel measurement time interval. The other time intervals in its set are to be used as data transmission time intervals. The combined use type interval facilitates the measurement of interference on the device's channel while still allowing the device to transmit some data during the interval. A combined use interval includes a first portion for data transmission and a second portion for channel measurement. In some embodiments, the first portion is fixed size and the second portion occurs at the very end of the interval. In some embodiments, the duration of the first portion is varied over time such that the channel measurement start time varies.

Abstract translation: 无线通信设备在可以由多个设备同时使用通信资源的系统中操作。 具有所获得的一组循环时间间隔的装置例如选择伪随机地选择要用作组合数据传输和信道测量时间间隔的间隔或间隔。 其集合中的其他时间间隔将用作数据传输时间间隔。 组合使用类型间隔有助于测量设备信道上的干扰，同时仍允许设备在间隔期间传输一些数据。 组合使用间隔包括用于数据传输的第一部分和用于信道测量的第二部分。 在一些实施例中，第一部分是固定尺寸，第二部分发生在间隔的最后端。 在一些实施例中，第一部分的持续时间随着时间而变化，使得信道测量开始时间变化。

公开(公告)号：US08521208B2

公开(公告)日：2013-08-27

申请号：US12835278

申请日：2010-07-13

Applicant: Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian

Inventor： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian

IPC: H04B7/10

CPC classification number: H04W52/241 ,  H04W52/243 ,  H04W52/38 ,  H04W52/383

Abstract: 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.

Abstract translation: 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：US20130083699A1

公开(公告)日：2013-04-04

申请号：US13251849

申请日：2011-10-03

Applicant: Xinzhou Wu ,  Saurabh Tavildar ,  Sundar Subramanian ,  Christopher S. Chang ,  Nilesh Khude

Inventor： Xinzhou Wu ,  Saurabh Tavildar ,  Sundar Subramanian ,  Christopher S. Chang ,  Nilesh Khude

IPC: H04W40/00 ,  H04W76/00 ,  H04L12/28

CPC classification number: H04W76/023 ,  H04W4/08 ,  H04W76/14

Abstract: An apparatus, a method of the apparatus, and a computer program in the apparatus are provided in which the apparatus determines a group to which each of a plurality of wireless devices is associated based on signals received from the plurality of wireless devices. The apparatus selects a group for access to a wireless medium from a plurality of groups based on the group determined for each of the plurality of wireless devices and based on reducing interference with the plurality of wireless devices. Each of the plurality of groups has a different priority. The apparatus communicates using peer-to-peer communication on the wireless medium with a priority based on the selected group.

Abstract translation: 提供了该装置中的装置，装置的方法和计算机程序，其中，装置根据从多个无线装置接收的信号确定多个无线装置中的每一个相关联的组。 该设备基于为多个无线设备中的每一个确定的组，并且基于减少与多个无线设备的干扰，从多个组中选择用于接入无线介质的组。 多个组中的每一个具有不同的优先级。 该设备使用基于所选择的组的优先级在无线介质上使用对等通信进行通信。

公开(公告)号：US20130065621A1

公开(公告)日：2013-03-14

申请号：US13232170

申请日：2011-09-14

Applicant: Christopher S. Chang ,  Sundar Subramanian ,  Xinzhou Wu ,  Nilesh Khude

Inventor： Christopher S. Chang ,  Sundar Subramanian ,  Xinzhou Wu ,  Nilesh Khude

IPC: H04W72/04 ,  H04W84/18

CPC classification number: H04W84/18 ,  H04W40/16 ,  H04W72/1231 ,  Y02D70/122 ,  Y02D70/142 ,  Y02D70/22 ,  Y02D70/34

Abstract: Methods and apparatus for efficiently scheduling links in wireless communications networks are described. Various described methods and apparatus are well suited for use in ad hoc wireless networks in which scheduling decisions are made in a distributed and/or decentralized manner. In some embodiments, the links in a network, e.g., in a peer to peer ad hoc network, are adaptively grouped based on comparable link channel gain. Exemplary signaling used, in some but not necessarily all embodiments, by devices to estimate channel gains include broadcast connection identifier signals and reverse broadcast connection identifier signals. Grouping links into sets based on comparable link channel gain, and selectively ordering the scheduling priorities of the different groups, is used to improve scheduling efficiency, e.g., decrease the likelihood that unnecessary yielding occurs.

Abstract translation: 描述了在无线通信网络中有效调度链路的方法和装置。 各种描述的方法和装置非常适用于其中以分布式和/或分散式进行调度决定的自组织无线网络。 在一些实施例中，网络中的链路，例如在对等自组织网络中，基于可比较的链路信道增益自适应地分组。 在一些但不一定所有实施例中，通过用于估计信道增益的设备使用的示例性信令包括广播连接标识符信号和反向广播连接标识符信号。 基于可比较的链路信道增益将链路分组成组，并且选择性地排序不同组的调度优先级，用于提高调度效率，例如，降低发生不必要的产生的可能性。

公开(公告)号：US20130010618A1

公开(公告)日：2013-01-10

申请号：US13323270

申请日：2011-12-12

Applicant: Ying Wang ,  Sundar Subramanian ,  Xinzhou Wu ,  Thomas J. Richardson ,  Junyi Li

Inventor： Ying Wang ,  Sundar Subramanian ,  Xinzhou Wu ,  Thomas J. Richardson ,  Junyi Li

IPC: H04W24/00

CPC classification number: H04W8/005 ,  H04W84/18

Abstract: A method, a computer program product, and an apparatus for wireless communication are provided. The apparatus transmits a first peer discovery signal with a first periodicity/temporal frequency in a first set of peer discovery resources. The apparatus determines an energy on an allocated peer discovery resource of a second set of peer discovery resources. The apparatus refrains from transmitting a second peer discovery signal in the second set of peer discovery resources when the energy is greater than a threshold. The apparatus transmits the second peer discovery signal in the second set of peer discovery resources with a second periodicity/temporal frequency less than the first periodicity/temporal frequency when the energy is less than the threshold. The apparatus may utilize the first set of peer discovery resources every period and the second set of peer discovery resources once every N periods in which once every N periods is the second periodicity.

Abstract translation: 提供了一种方法，计算机程序产品和用于无线通信的装置。 该设备在第一组对等体发现资源中发送具有第一周期/时间频率的第一对等体发现信号。 设备确定第二组对等体发现资源的分配的对等体发现资源上的能量。 当能量大于阈值时，该装置禁止在第二组对等体发现资源中发送第二对等体发现信号。 当能量小于阈值时，该设备以第二周期/时间频率小于第一周期/时间频率，在第二组对等体发现资源中发送第二对等体发现信号。 该装置可以每N个周期每周期利用第一组对等体发现资源和第二组对等体发现资源，其中每N个周期中的一个是第二周期。

公开(公告)号：US20110292817A1

公开(公告)日：2011-12-01

申请号：US12788487

申请日：2010-05-27

Applicant: Mathieu Leconte ,  Xinzhou Wu ,  Rayadurgam Srikant ,  Sundar Subramanian ,  Nilesh Khude

Inventor： Mathieu Leconte ,  Xinzhou Wu ,  Rayadurgam Srikant ,  Sundar Subramanian ,  Nilesh Khude

IPC: H04L12/26

CPC classification number: H04W74/0816 ,  H04W84/18

Abstract: A method of operating a wireless device is provided in which a number of neighboring nodes is estimated, a medium access priority to access a communication resource in a current timeslot is determined, and whether to transmit a scheduling control signal in the current timeslot is determined based on the number of neighboring nodes and the medium access priority.

Abstract translation: 提供一种操作无线设备的方法，其中估计多个相邻节点，确定当前时隙中访问通信资源的介质访问优先级，并且基于当前时隙中是否发送调度控制信号来确定 关于相邻节点的数量和介质访问优先级。

公开(公告)号：US20110205887A1

公开(公告)日：2011-08-25

申请号：US12712629

申请日：2010-02-25

Applicant: Xinzhou Wu ,  Junyi Li ,  Nilesh Khude ,  Sundar Subramanian

Inventor： Xinzhou Wu ,  Junyi Li ,  Nilesh Khude ,  Sundar Subramanian

IPC: H04B7/00 ,  H04L12/56

CPC classification number: H04W52/343 ,  H04W52/322 ,  H04W52/46

Abstract: 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.

Abstract translation: 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

Applicant: Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian ,  Nilesh Khude

Inventor： Junyi Li ,  Xinzhou Wu ,  Sundar Subramanian ,  Nilesh Khude

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

Abstract: 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.