公开(公告)号：US09025466B2

公开(公告)日：2015-05-05

申请号：US13541984

申请日：2012-07-05

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

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

IPC分类号： H04Q7/28 ,  H04W24/00 ,  H04B17/00 ,  H04L12/26 ,  H04J3/14

CPC分类号： H04W24/00 ,  H04J3/14 ,  H04L5/0064 ,  H04L43/50 ,  H04W74/0808 ,  H04W74/0816 ,  H04W84/18

摘要： A transmission initiation interval timing structure is used in combination with a lower layer timing structure, e.g., physical layer timing structure. A device selects a subset of packet transmission initiation intervals and then limits initiation of packet transmission to those intervals thereby reducing the potential for collisions. Packet transmission may occur outside the initiation interval in which the transmission is initiated. In some embodiments, packet transmission length is intentionally limited to sizes which can be transmitted in a fraction of the amount of time the physical layer allows a single device to continuously transmit, e.g., in an amount of time which is equal to or less than the duration of a packet transmission initiation interval. This increases the probability that multiple devices will be able to successfully transmit small packets at short intervals on a regular basis even when carrier sensing techniques are used.

摘要翻译： 传输启动间隔定时结构与较低层定时结构结合使用，例如物理层定时结构。 设备选择分组传输启动间隔的子集，然后限制分组传输的开始到那些间隔，从而减少冲突的可能性。 分组传输可能发生在传输启动的发起间隔之外。 在一些实施例中，分组传输长度被有意地限制为可以在物理层允许单个设备连续发送的时间量的一小部分中传输的大小，例如，等于或小于 分组传输启动间隔的持续时间。 这增加了即使在使用载波感测技术的情况下，多个设备将能够以短时间间隔成功地发送小分组的概率。

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：US08798656B2

公开(公告)日：2014-08-05

申请号：US13448174

申请日：2012-04-16

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

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

IPC分类号： H04W72/02

CPC分类号： H04W72/02 ,  H04W72/005 ,  H04W84/18

摘要： A method, a computer program product, and an apparatus for wireless communication are provided. The apparatus transmits broadcast information in a first broadcast resource from a first set of broadcast resources. In addition, the apparatus determines based on the broadcast information a need for a second broadcast resource from a second set of broadcast resources. Furthermore, the apparatus selects the second broadcast resource based on a priority associated with the first broadcast resource.

摘要翻译： 提供了一种方法，计算机程序产品和用于无线通信的装置。 该装置从第一组广播资源发送第一广播资源中的广播信息。 此外，该装置基于广播信息，从第二组广播资源中确定需要第二广播资源。 此外，设备基于与第一广播资源相关联的优先级来选择第二广播资源。

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：US20130176856A1

公开(公告)日：2013-07-11

申请号：US13541984

申请日：2012-07-05

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

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

IPC分类号： H04W74/08

CPC分类号： H04W24/00 ,  H04J3/14 ,  H04L5/0064 ,  H04L43/50 ,  H04W74/0808 ,  H04W74/0816 ,  H04W84/18

摘要： A transmission initiation interval timing structure is used in combination with a lower layer timing structure, e.g., physical layer timing structure. A device selects a subset of packet transmission initiation intervals and then limits initiation of packet transmission to those intervals thereby reducing the potential for collisions. Packet transmission may occur outside the initiation interval in which the transmission is initiated. In some embodiments, packet transmission length is intentionally limited to sizes which can be transmitted in a fraction of the amount of time the physical layer allows a single device to continuously transmit, e.g., in an amount of time which is equal to or less than the duration of a packet transmission initiation interval. This increases the probability that multiple devices will be able to successfully transmit small packets at short intervals on a regular basis even when carrier sensing techniques are used.

摘要翻译： 传输启动间隔定时结构与较低层定时结构结合使用，例如物理层定时结构。 设备选择分组传输启动间隔的子集，然后限制分组传输的开始到那些间隔，从而减少冲突的可能性。 分组传输可能发生在传输启动的启动间隔之外。 在一些实施例中，分组传输长度被有意地限制为可以在物理层允许单个设备连续发送的时间量的一小部分中传输的大小，例如，等于或小于 分组传输启动间隔的持续时间。 这增加了即使在使用载波感测技术的情况下，多个设备将能够以短时间间隔成功地发送小分组的概率。

公开(公告)号：US09094164B2

公开(公告)日：2015-07-28

申请号：US13448638

申请日：2012-04-17

申请人： Sundar Subramanian ,  Xinzhou Wu ,  Quan Geng ,  Cyril Measson ,  Thomas J. Richardson ,  Junyi Li

发明人： Sundar Subramanian ,  Xinzhou Wu ,  Quan Geng ,  Cyril Measson ,  Thomas J. Richardson ,  Junyi Li

IPC分类号： H04L5/00 ,  H04L1/00 ,  H04L27/26 ,  H04L25/02

CPC分类号： H04L5/0048 ,  H04L1/0042 ,  H04L1/0068 ,  H04L5/0007 ,  H04L25/0226 ,  H04L27/2613

摘要： A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus generates a codeword, determines at least one puncture to the codeword based on allowing a legacy receiver to decode the codeword without knowledge of the at least one puncture, replaces each of the at least one puncture with a pilot, and transmits the codeword. The apparatus may also generate an IEEE 802.11 codeword having pilots in a first set of subcarriers, and puncture the codeword with additional pilots unknown to a legacy receiver in a second set of subcarriers. Accordingly, when an original set of pilot symbols is insufficient or inappropriately placed in a resource structure, a codeword may be transmitted with a new pilot structure capable of being decoded by legacy receivers not aware of the new pilot structure.

摘要翻译： 提供了一种用于无线通信的方法，装置和计算机程序产品。 该装置产生码字，基于允许传统接收机在不知道至少一个穿孔的情况下对码字进行解码，确定至少一个穿刺码字，用导频代替至少一个穿孔中的每一个，并发送该码字。 该装置还可以生成在第一组子载波中具有导频的IEEE 802.11码字，并且在第二组副载波中对传统接收机未知的附加导频进行穿孔。 因此，当原始的导频符号集合不足或不适当地放置在资源结构中时，可以用能够被不知道新导频结构的传统接收机解码的新导频结构来发送码字。

公开(公告)号：US20130272443A1

公开(公告)日：2013-10-17

申请号：US13448638

申请日：2012-04-17

申请人： Sundar Subramanian ,  Xinzhou Wu ,  Quan Geng ,  Cyril Measson ,  Thomas J. Richardson ,  Junyi Li

发明人： Sundar Subramanian ,  Xinzhou Wu ,  Quan Geng ,  Cyril Measson ,  Thomas J. Richardson ,  Junyi Li

IPC分类号： H04L27/28

CPC分类号： H04L5/0048 ,  H04L1/0042 ,  H04L1/0068 ,  H04L5/0007 ,  H04L25/0226 ,  H04L27/2613

摘要： A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus generates a codeword, determines at least one puncture to the codeword based on allowing a legacy receiver to decode the codeword without knowledge of the at least one puncture, replaces each of the at least one puncture with a pilot, and transmits the codeword. The apparatus may also generate an IEEE 802.11 codeword having pilots in a first set of subcarriers, and puncture the codeword with additional pilots unknown to a legacy receiver in a second set of subcarriers. Accordingly, when an original set of pilot symbols is insufficient or inappropriately placed in a resource structure, a codeword may be transmitted with a new pilot structure capable of being decoded by legacy receivers not aware of the new pilot structure.

摘要翻译： 提供了一种用于无线通信的方法，装置和计算机程序产品。 该装置产生码字，基于允许传统接收机在不知道至少一个穿孔的情况下对码字进行解码，确定至少一个穿刺码字，用导频代替至少一个穿孔中的每一个，并发送该码字。 该装置还可以生成在第一组子载波中具有导频的IEEE 802.11码字，并且在第二组副载波中对传统接收机未知的附加导频进行穿孔。 因此，当原始的导频符号集合不足或不适当地放置在资源结构中时，可以用能够被不知道新导频结构的传统接收机解码的新导频结构来发送码字。

公开(公告)号：US20130064089A1

公开(公告)日：2013-03-14

申请号：US13231417

申请日：2011-09-13

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

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

IPC分类号： H04W72/04 ,  H04W24/00

CPC分类号： H04W28/0289 ,  H04W74/08 ,  H04W84/18

摘要： 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.

摘要翻译： 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。