公开(公告)号：US20100309854A1

公开(公告)日：2010-12-09

申请号：US12477356

申请日：2009-06-03

申请人： Xinzhou Wu ,  Thomas Richardson ,  Junyi Li ,  Saurabh Tavildar ,  Pramod Viswanath

发明人： Xinzhou Wu ,  Thomas Richardson ,  Junyi Li ,  Saurabh Tavildar ,  Pramod Viswanath

IPC分类号： H04W4/00 ,  H04B1/00 ,  H04L1/02

CPC分类号： H04B7/0413 ,  H04B7/0617 ,  H04B7/086

摘要： Aspects relate to interference management in a multiple-input-multiple-output peer-to-peer network utilizing connection scheduling. When channel side information is available at both transmitter and receiver, both devices determine transmit/receiver beamforming vectors. Transmitter sends a first transmission request signal with first transmit beamforming vector and a second transmission request signal with second transmit beamforming vector in a transmission request block. Receiver estimates SINRs of the MIMO channels associated with the receive beamforming vectors and determines whether to return request response signals. Based on received request response signals, transmitter decides to transmit streams of data using the corresponding transmit beamforming vectors in the data burst. When channel side information is available only at receiver, transmitter sends one transmission request signal. Receiver estimates the SINRs of the MIMO channels associated with receive beamforming vectors using MMSE and/or successive interference cancellation (SIC), and returns request response signals in the request response block.

摘要翻译： 方面涉及利用连接调度的多输入多输出对等网络中的干扰管理。 当信道侧信息在发射机和接收机都可用时，两个设备确定发射/接收机波束成形向量。 发射机在发射请求块中发送具有第一发射波束形成向量的第一传输请求信号和具有第二发射波束形成向量的第二传输请求信号。 接收机估计与接收波束形成向量相关联的MIMO信道的SINR，并确定是否返回请求响应信号。 基于接收到的请求响应信号，发射机决定使用数据突发中的对应的发射波束形成向量来发送数据流。 当信道侧信息仅在接收机处可用时，发射机发送一个传输请求信号。 接收机使用MMSE和/或连续干扰消除（SIC）估计与接收波束成形向量相关联的MIMO信道的SINR，并且在请求响应块中返回请求响应信号。

公开(公告)号：US20100118761A1

公开(公告)日：2010-05-13

申请号：US12268186

申请日：2008-11-10

申请人： Xinzhou Wu ,  Junyi Li ,  Sanjay Shakkottai ,  Rajiv Laroia ,  Saurabh Tavildar ,  Thomas Richardson ,  Jay Kumar Sundararajan

发明人： Xinzhou Wu ,  Junyi Li ,  Sanjay Shakkottai ,  Rajiv Laroia ,  Saurabh Tavildar ,  Thomas Richardson ,  Jay Kumar Sundararajan

IPC分类号： H04B7/14

CPC分类号： H04W72/1231 ,  H04L5/003 ,  H04L5/0037 ,  H04L5/0053 ,  H04L5/006 ,  H04L5/0064 ,  H04L5/0091 ,  H04W72/1236 ,  H04W84/18

摘要： Methods and apparatus relating to scheduling of air link resources, e.g., traffic segments, in a wireless communications system are described. Various described methods and apparatus are well suited to wireless peer to peer networks in which traffic scheduling is decentralized, e.g. an ad hoc peer to peer network. An individual wireless terminal corresponding to a peer to peer connection which desires to communicate traffic signals makes a receiver yielding decision. The receiver yielding decision, in some embodiments, includes comparing a link quality estimate corresponding to its own link, to a dynamically generated receiver yielding threshold. The dynamically generated receiver yielding threshold is determined based on at least one of: quality of service information corresponding to its own link and historical link quality information corresponding to its own link.

摘要翻译： 描述与无线通信系统中的空中链路资源（例如业务段）的调度有关的方法和装置。 各种描述的方法和装置非常适合于其中业务调度被分散的无线对等网络，例如， 一个特别的对等网络。 对应于对等连接的单个无线终端，其希望传送业务信号使接收机产生决定。 在一些实施例中，接收器产生决定包括将对应于其自身链路的链路质量估计与动态产生的接收机产生阈值进行比较。 基于与其自己的链路相对应的服务质量信息和对应于其自己的链路的历史链路质量信息中的至少一个来确定动态生成的接收机产生阈值。

公开(公告)号：US20090323665A1

公开(公告)日：2009-12-31

申请号：US12146888

申请日：2008-06-26

申请人： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Thomas Richardson ,  Xinzhou Wu ,  Sanjay Shakkottai

发明人： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Thomas Richardson ,  Xinzhou Wu ,  Sanjay Shakkottai

IPC分类号： H04J3/00

CPC分类号： H04W4/20

摘要： Methods and apparatus related to scheduling traffic slots in a wireless communications system, e.g., an ad hoc peer to peer communications network are described. An implemented timing structure includes multiple traffic transmission slots and multiple request blocks with different priorities corresponding to a traffic transmission slot. A wireless terminal determines its own block priority level. If a wireless terminal's determined block priority level is the highest block priority level the wireless terminal is allowed to transmit a traffic transmission request in the highest traffic transmission request block; otherwise, the wireless terminal is restricted from transmitting a traffic transmission request in the highest priority request block. A wireless terminal monitors for request and/or request response activity corresponding to other connections high priority block signaling, and uses the collected information to determine its own block priority.

摘要翻译： 描述了在无线通信系统（例如，自组织对等通信网络）中调度业务时隙的方法和装置。 实施的定时结构包括多个业务传输时隙和具有与业务传输时隙对应的不同优先级的多个请求块。 无线终端确定其自身的块优先级。 如果无线终端确定的块优先级是最高块优先级，则允许无线终端在最高业务传输请求块中发送业务传输请求; 否则，无线终端被限制在最高优先级请求块中发送业务传输请求。 无线终端监视与其他连接高优先级块信令相对应的请求和/或请求响应活动，并且使用所收集的信息来确定其自身的块优先级。

公开(公告)号：US20090016248A1

公开(公告)日：2009-01-15

申请号：US11775787

申请日：2007-07-10

申请人： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Thomas Richardson ,  Xinzhou WU ,  Leonard Grokop

发明人： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Thomas Richardson ,  Xinzhou WU ,  Leonard Grokop

IPC分类号： H04B7/005

CPC分类号： H04L5/0053 ,  H04L5/0007

摘要： Systems and methodologies are described that facilitate identifying peers based upon encoded signals during peer discovery in a peer to peer network. For example, direct signaling that partitions a time-frequency resource into a number of segments can be utilized to communicate an identifier within a peer discovery interval; thus, a particular segment selected for transmission can signal a portion of the identifier, while a remainder can be signaled based upon tones communicated within the selected segment. Moreover, a subset of symbols within the resource can be reserved (e.g., unused) to enable identifying and/or correcting timing offset. Further, signaling can be effectuated over a plurality of peer discovery intervals such that partial identifiers communicated during each of the peer discovery intervals can be linked (e.g., based upon overlapping bits and/or bloom filter information).

公开(公告)号：US08767709B2

公开(公告)日：2014-07-01

申请号：US13112598

申请日：2011-05-20

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

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

IPC分类号： H04W28/12

CPC分类号： H04W74/00 ,  H04W72/12

摘要： Methods and apparatus related to the communication of traffic in peer to peer communications are described. A peer to peer communications system includes traffic slots, and for a pair of devices (first and second) having a connection a first transmission request resource and a second transmission request resource are associated with a traffic transmission interval of the traffic slot, the first request resource preceding the second request resource. The first device can utilize the first resource to transmit a request to transmit traffic to the second device, and when it does, it also uses the second resource to transmit additional information corresponding to the request and/or traffic. If the second device doesn't detect a request on the first resource, then it can use the second resource to transmit a request to first device to transmit traffic to the first device.

摘要翻译： 描述了与对等通信中流量通信有关的方法和设备。 对等通信系统包括业务时隙，并且对于具有第一传输请求资源和第二传输请求资源的连接的一对设备（第一和第二）与业务时隙的业务传输间隔相关联，所述第一请求 资源在第二个请求资源之前。 第一设备可以利用第一资源来发送向第二设备传输业务的请求，并且当它执行时，它还使用第二资源来发送对应于请求和/或业务的附加信息。 如果第二设备没有检测到第一资源上的请求，则可以使用第二资源向第一设备发送请求以向第一设备发送业务。

公开(公告)号：US08743823B2

公开(公告)日：2014-06-03

申请号：US12370092

申请日：2009-02-12

申请人： Thomas Richardson ,  Xinzhou Wu ,  Ying Wang ,  Saurabh Tavildar ,  Junyi Li

发明人： Thomas Richardson ,  Xinzhou Wu ,  Ying Wang ,  Saurabh Tavildar ,  Junyi Li

IPC分类号： H04W4/00 ,  H04W72/04 ,  H04W74/08

CPC分类号： H04W72/0446 ,  H04W8/005 ,  H04W74/08 ,  H04W74/0825

摘要： Techniques for transmitting signals on shared resources in a manner to detect and/or combat collision are described. In an aspect, a terminal may transmit a signal on a subset of resource elements in a resource block, and at least one null resource element with no signal may be used to detect for collision of the signal. In another aspect, different terminals may simultaneously transmit their signals on different subsets of resource elements in a resource block. These different subsets of resource elements may be pseudo-randomly selected to randomize interference. In one design, a terminal may determine a resource block to use for transmission of a signal, select a subset of the resource elements in the resource block, and transmit the signal on the selected resource elements, e.g., to at least one other terminal for peer-to-peer communication. The signal may be a peer discovery signal, a paging signal, etc.

摘要翻译： 描述了以共享资源发送信号以检测和/或防止碰撞的方式。 在一方面，终端可以在资源块中的资源元素的子集上发送信号，并且可以使用至少一个没有信号的空资源元素来检测信号的冲突。 在另一方面，不同的终端可以在资源块中的资源元素的不同子集上同时发送它们的信号。 这些不同的资源元素子集可以被伪随机地选择以随机化干扰。 在一种设计中，终端可以确定用于信号传输的资源块，选择资源块中的资源元素的子集，并将所选择的资源元素上的信号，例如至少一个其他终端发送到 对等通信。 信号可以是对等体发现信号，寻呼信号等。

公开(公告)号：US08494007B2

公开(公告)日：2013-07-23

申请号：US11775803

申请日：2007-07-10

申请人： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Thomas Richardson ,  Xinzhou Wu ,  Leonard Grokop

发明人： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Thomas Richardson ,  Xinzhou Wu ,  Leonard Grokop

IPC分类号： H04J1/02 ,  H04J3/06 ,  H04J3/12

CPC分类号： H04W8/005 ,  H04L5/0007 ,  H04L5/0032 ,  H04L5/0053 ,  H04W8/26 ,  H04W72/02

摘要： Systems and methodologies are described that facilitate identifying peers based upon encoded signals during peer discovery in a peer to peer network. For example, direct signaling that partitions a time-frequency resource into a number of segments can be utilized to communicate an identifier within a peer discovery interval; thus, a particular segment selected for transmission can signal a portion of the identifier, while a remainder can be signaled based upon tones communicated within the selected segment. Moreover, a subset of symbols within the resource can be reserved (e.g., unused) to enable identifying and/or correcting timing offset. Further, signaling can be effectuated over a plurality of peer discovery intervals such that partial identifiers communicated during each of the peer discovery intervals can be linked (e.g., based upon overlapping bits and/or bloom filter information).

公开(公告)号：US20120059935A1

公开(公告)日：2012-03-08

申请号：US12875311

申请日：2010-09-03

申请人： Shailesh Patil ,  Thomas Richardson ,  Xinzhou Wu ,  Junyi Li ,  Saurabh Tavildar ,  Pablo A. Anigstein

发明人： Shailesh Patil ,  Thomas Richardson ,  Xinzhou Wu ,  Junyi Li ,  Saurabh Tavildar ,  Pablo A. Anigstein

IPC分类号： G06F15/16

CPC分类号： H04W72/02 ,  H04W72/0493 ,  H04W72/06 ,  H04W72/085 ,  H04W84/18 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/162 ,  Y02D70/20

摘要： A method, an apparatus, and a computer program product are provided in which signals are received on each of a plurality of resources and an energy of each of the signals of a set of the plurality of resources is determined. In addition, a resource is determined based on a probability for each of the resources in a subset of the set. The probability for selecting a resource with a lower determined energy is less than one and greater than the probability for selecting a resource with a higher determined energy. Furthermore, a signal is transmitted on the selected resource.

摘要翻译： 提供了一种方法，装置和计算机程序产品，其中在多个资源中的每一个上接收信号，并且确定多个资源集合中的每个信号的能量。 此外，基于集合的子集中的每个资源的概率来确定资源。 选择具有较低确定能量的资源的概率小于1且大于选择具有较高确定能量的资源的概率。 此外，在所选择的资源上发送信号。

公开(公告)号：US07983165B2

公开(公告)日：2011-07-19

申请号：US11933042

申请日：2007-10-31

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

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

IPC分类号： G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26 ,  H04B7/212 ,  H04B7/00

CPC分类号： H04W72/1231 ,  H04W72/1278 ,  H04W84/18 ,  H04W92/18

摘要： Methods and apparatus for use in a wireless communications system in which traffic air link resources may be, and sometimes are, shared are described. Various described methods and apparatus are well suited for use in a peer to peer communications system in which transmission control decisions are made in a decentralized manner. An exemplary peer to peer communications system implements the scheduling of traffic intervals in a distributed manner utilizing connection priority information and interference information. An exemplary peer to peer timing structure includes a user scheduling interval and an associated traffic interval. The user scheduling interval includes a plurality transmission request/request response rounds. By utilizing multiple request/request response rounds, a transmission decision corresponding to a connection to yield in an earlier round can be overridden in a subsequent round, resulting in higher overall traffic throughput in the system.

摘要翻译： 描述用于其中交通空中链路资源可以共享的无线通信系统中的方法和装置。 各种描述的方法和装置非常适合用于以分散方式进行传输控制决定的对等通信系统。 示例性的对等通信系统利用连接优先级信息和干扰信息以分布式方式实现业务间隔的调度。 一种示例性的对等定时结构包括用户调度间隔和相关联的业务间隔。 用户调度间隔包括多个发送请求/请求响应轮。 通过利用多个请求/请求响应轮，可以在随后的一轮中覆盖对应于在较早轮中产生的连接的传输决定，导致系统中更高的总体流量吞吐量。

公开(公告)号：US20110085620A1

公开(公告)日：2011-04-14

申请号：US12578251

申请日：2009-10-13

申请人： Cyril Measson ,  Alberto Vigato ,  Saurabh Tavildar ,  Junyi Li ,  Thomas Richardson ,  Xinzhou Wu

发明人： Cyril Measson ,  Alberto Vigato ,  Saurabh Tavildar ,  Junyi Li ,  Thomas Richardson ,  Xinzhou Wu

IPC分类号： H04L27/00 ,  H04L27/06

CPC分类号： H04L1/0075

摘要： Non-coherent modulation is used to communicate coding information via pilot signals using a first subset of resources, and coherent modulation is used to generate data signals. This allows for a stronger global code while keeping individual signaling complexity low. First and second communications devices communicate information using a set of communications resources. By performing non-coherent demodulation on pilot signals received on a first subset of said set of communications resources coding information is recovered. First and second channel estimates are generated from the pilot signals received on the first subset of said communications resources. Coherent demodulation is performed on data signals received on a second subset of said set of communications resources using said first and second channel estimates and said coding information to recover information communicated by said first communications device and to recover separate information communicated by said second communications device.

摘要翻译： 非相干调制用于通过使用第一资源子集的导频信号来传送编码信息，并使用相干调制来产生数据信号。 这允许更强的全局代码，同时保持单个信令复杂度较低。 第一和第二通信设备使用一组通信资源来传送信息。 通过对在所述一组通信资源的第一子集上接收的导频信号执行非相干解调，编码信息被恢复。 从在所述通信资源的第一子集上接收的导频信号产生第一和第二信道估计。 对使用所述第一和第二信道估计和所述编码信息的所述通信资源集合的第二子集上接收的数据信号执行相干解调，以恢复由所述第一通信设备传送的信息并恢复由所述第二通信设备传送的单独信息。