公开(公告)号：US08432786B2

公开(公告)日：2013-04-30

申请号：US12169080

申请日：2008-07-08

Applicant: Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Xinzhou Wu

Inventor： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Xinzhou Wu

IPC: H04J11/00

CPC classification number: H04L5/0007 ,  H04L5/0044 ,  H04L5/0053 ,  H04L5/0062 ,  H04L5/0091 ,  H04W72/082 ,  H04W76/11 ,  H04W76/14 ,  H04W84/18 ,  H04W92/18

Abstract: A protocol is provided that facilitates downlink concurrent peer-to-peer communications (within a time slot or traffic slot) between one device and many terminals as well as uplink concurrent peer-to-peer communications (within a time slot or traffic slot) between a plurality of terminals and one device. The concurrent peer-to-peer communications may take place within an ad hoc network of devices. To facilitate such operation, a time-frequency structure is provided within a control channel that allows the device and terminals to identify the peer-to-peer connections. This time-frequency structure also allows terminals to identify other sibling terminals that have a connection with the same device, thereby allowing to more efficiently performing interference mitigation. That is, sibling peer-to-peer connections with the same device may be treated different from other non-related peer-to-peer connects for purposes of interference mitigation in a wireless network.

Abstract translation: 提供了一种协议，其有助于一个设备与许多终端之间的下行链路并发对等通信（在时隙或业务时隙内）以及上行链路并发对等通信（在时隙或业务时隙内） 多个终端和一个设备。 并发的对等通信可以在设备的自组织网络中进行。 为了促进这种操作，在控制信道内提供时间 - 频率结构，其允许设备和终端识别对等连接。 该时频结构还允许终端识别与同一设备具有连接的其他兄弟终端，从而允许更有效地执行干扰减轻。 也就是说，与无线网络中的干扰减轻的目的可以将与同一设备的同级对等连接对待与其他非相关对等连接不同。

公开(公告)号：US20130059614A1

公开(公告)日：2013-03-07

申请号：US13226101

申请日：2011-09-06

Applicant: Sreeram Kannan ,  Ahmed K. Sadek ,  Stephen J. Shellhammer ,  Saurabh Tavildar ,  Nilesh Khude

Inventor： Sreeram Kannan ,  Ahmed K. Sadek ,  Stephen J. Shellhammer ,  Saurabh Tavildar ,  Nilesh Khude

IPC: H04W72/02

CPC classification number: H04W72/06 ,  H04W8/005

Abstract: A decentralized approach to peer discovery channel selection is used in some embodiments. In some such embodiments, a mobile wireless terminal supporting a peer to peer signaling protocol, independently determines what channels to use for peer discovery without a central controller indicating the channel or channels to be used. Assuming channels are of a suitable quality, the channels having the best quality need not be identified, with channel selection being made on a predetermined channel ordering basis from those with suitable quality. Different wireless communications devices in the system use the same peer discovery channel selection process making it likely that the same channel or channels will tend to be picked to be used for peer discovery. Other embodiments are directed to implementing a centralized approach to peer discovery channel selection in which a central controller or base station selects channels to be used for peer discovery signaling.

Abstract translation: 在一些实施例中使用分布式对等体发现信道选择方法。 在一些这样的实施例中，支持对等信令协议的移动无线终端独立地确定用于对等体发现的哪些信道，而不指示要使用的信道或信道的中央控制器。 假设信道具有合适的质量，则不需要识别具有最佳质量的信道，其中信道选择是从具有适当质量的信道选择进行的。 系统中的不同的无线通信设备使用相同的对等体发现信道选择过程，使得可能相同的信道或信道将倾向于被选择用于对等体发现。 其他实施例涉及实现对等体发现信道选择的集中式方法，其中中央控制器或基站选择要用于对等体发现信令的信道。

公开(公告)号：US20130010661A1

公开(公告)日：2013-01-10

申请号：US13177037

申请日：2011-07-06

Applicant: Eduardo S. Esteves ,  Junyi Li ,  Saurabh Tavildar

Inventor： Eduardo S. Esteves ,  Junyi Li ,  Saurabh Tavildar

IPC: H04W4/00

CPC classification number: H04B1/713 ,  H04L5/0037 ,  H04L27/2601 ,  H04W8/005

Abstract: A method of wireless communication includes splitting data into n data sets, where n is greater than or equal to two. In addition, the method includes selecting n different resources associated with a resource identifier based on a hopping pattern for sending each of the data sets within a set of resources of one full set of transmissions. The selected n resources have a hopping pattern such that there is at least one resource of the n resources that is non-overlapping in time with resources associated with resource identifiers other than said resource identifier. Furthermore, the method includes sending m data sets on m selected resources in m transmissions within the one full set of transmissions, where m is less than or equal to n.

Abstract translation: 一种无线通信方法包括将数据分割为n个数据集，其中n大于或等于2。 另外，该方法包括基于用于在一组完整传输集合的资源集合内发送每个数据集的跳频模式来选择与资源标识符相关联的n个不同资源。 所选择的n资源具有跳频模式，使得存在与资源标识符以外的资源相关联的资源在时间上不重叠的n个资源的至少一个资源。 此外，该方法包括在一个完整的传输集合内的m个传输中的m个选择的资源上发送m个数据集，其中m小于或等于n。

公开(公告)号：US08331249B2

公开(公告)日：2012-12-11

申请号：US12166692

申请日：2008-07-02

Applicant: Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Xinzhou Wu

Inventor： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Xinzhou Wu

IPC: H04L12/26

CPC classification number: H04L5/0048 ,  H04B7/15542 ,  H04L1/0002 ,  H04L1/0023 ,  H04L1/20 ,  H04L5/0007 ,  H04L5/0033 ,  H04L5/0044 ,  H04L5/006 ,  H04L25/0226 ,  H04L25/0228 ,  H04L27/2647 ,  H04W72/02 ,  H04W72/085

Abstract: Methods and Apparatus for communicating information, e.g., control information, e.g., in the form of a control value, between communications devices, e.g., peer to peer communications devices, are described. Positional coding is used to encode a value to be communicated and the encoded value it then transmitted on a set of communications resources with the placement of signal energy on individual ones of the resources being used to create a pattern used to convey the value to be communicated. Resources, e.g., tone-symbols, which communicate unreliable signal portions due to interference are identified and not used in the positional decoding operation as either an energy carrying tone-symbol or a non-energy carrying tone-symbol.

Abstract translation: 描述了用于在通信设备（例如，对等通信设备）之间传送信息的方法和装置，例如控制信息，例如以控制值的形式。 位置编码用于对要传送的值进行编码，然后将其编码值发送到一组通信资源上，将信号能量放置在用于创建用于传达要传送的值的模式中的各个资源上 。 在位置解码操作中识别和不使用资源，例如由于干扰而传送不可靠信号部分的音调符号作为能量承载音符号或不能承载音调符号。

公开(公告)号：US08249046B2

公开(公告)日：2012-08-21

申请号：US12477356

申请日：2009-06-03

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

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

IPC: H04W4/00 ,  H04J1/00

CPC classification number: H04B7/0413 ,  H04B7/0617 ,  H04B7/086

Abstract: 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.

Abstract translation: 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：US08238836B2

公开(公告)日：2012-08-07

申请号：US12168690

申请日：2008-07-07

Applicant: Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Xinzhou Wu

Inventor： Junyi Li ,  Rajiv Laroia ,  Saurabh Tavildar ,  Xinzhou Wu

IPC: H04B17/00

CPC classification number: H04L1/0002 ,  H04L1/0025 ,  Y02D70/10 ,  Y02D70/20

Abstract: An improved mechanism is provided that facilitates transmission of small packets within an ad hoc peer-to-peer network. A small packet is identified to a receiver within a control channel so that its lower power can be considered in an interference management protocol implemented among local peer devices. In a traffic slot, a transmitter voluntarily backs down on the transmitter power as a smaller packet will require much lower signal-to-noise ratio. This will improve the signal energy per bit per noise power density for the transmission as well as minimize the interference caused to other wireless communications happening in the same spectrum.

公开(公告)号：US08238234B2

公开(公告)日：2012-08-07

申请号：US12477363

申请日：2009-06-03

Applicant: Hua Wang ,  Xinzhou Wu ,  Thomas Richardson ,  Pramod Viswanath ,  Junyi Li ,  Saurabh Tavildar

Inventor： Hua Wang ,  Xinzhou Wu ,  Thomas Richardson ,  Pramod Viswanath ,  Junyi Li ,  Saurabh Tavildar

IPC: H04L12/56

CPC classification number: H04B7/0871 ,  H04B7/0413 ,  H04B7/086

Abstract: Aspects describe different multiple antenna techniques that can be utilized in a peer-to-peer network based on a network congestion level. A MIMO scheme where a transmitter sends to a receiver multiple spatial streams at substantially the same time in the same traffic segment can be utilized when network congestion level is low. A receiver beam forming scheme where transmitter sends a single stream in a traffic segment and receiver uses multiple receive antennas to maximize signal to noise ratio can be utilized when network congestion level is high. The connection pair (transmitter and receiver) occupy more control resources in the MIMO scheme than the receiver beam forming scheme. The decision related to which technique to utilize can be made at about the same time as a communication is initiated. Further, if network conditions change during a communication, the antenna technique that is utilized can be switched to a different technique during the communication exchange.

Abstract translation: 方面描述了可以基于网络拥塞级别在对等网络中使用的不同的多天线技术。 当网络拥塞级别低时，可以利用MIMO方案，其中发射机在同一业务段中基本上同时间向接收机发送多个空间流。 一种接收机波束形成方案，其中发射机在业务段和接收机中发送单个流使用多个接收天线来最大化信噪比，可以在网络拥塞度高时使用。 连接对（发射机和接收机）在MIMO方案中占据比接收机波束形成方案更多的控制资源。 在通信开始的同时，可以进行与使用哪种技术有关的决定。 此外，如果在通信期间网络条件改变，则在通信交换期间，所利用的天线技术可以被切换到不同的技术。

公开(公告)号：US20120088450A9

公开(公告)日：2012-04-12

申请号：US12465938

申请日：2009-05-14

Applicant: Rajiv Laroia ,  Junyi Li ,  Saurabh Tavildar ,  Xinzhou Wu ,  Aleksandar Jovicic

Inventor： Rajiv Laroia ,  Junyi Li ,  Saurabh Tavildar ,  Xinzhou Wu ,  Aleksandar Jovicic

IPC: H04B7/00

CPC classification number: H04W72/12 ,  H04W8/005 ,  H04W84/18 ,  H04W88/06

Abstract: Methods and apparatus well suited for supporting communications over different ranges in, for example, a peer to peer wireless communications system, are described. In the peer to peer network at least some of the types of signals, e.g., peer discovery signals and/or paging signals, are transmitted with no closed loop power control. An exemplary peer to peer timing structure includes air link resources allocated for a particular type of signaling in which the resources are segmented into multiple blocks which do not overlap in time, different ones of the multiple blocks being associated with different ranges. The characteristics of the basic transmission units of the multiple blocks based on range are different, e.g., tone size and symbol width are different. A wireless communications device implements the peer to peer timing structure and uses resources from different range based blocks at different times. Data traffic transmission units may be the same regardless of the range.

Abstract translation: 描述了非常适合于支持例如对等无线通信系统中的不同范围的通信的方法和装置。 在对等网络中，在没有闭环功率控制的情况下，发送至少一些类型的信号，例如对等体发现信号和/或寻呼信号。 示例性的对等定时结构包括为特定类型的信令分配的空中链路资源，其中资源被分段成多个不在时间上重叠的块，多个块中的不同的块与不同的范围相关联。 基于范围的多个块的基本传输单元的特征是不同的，例如，音调尺寸和符号宽度不同。 无线通信设备实现对等定时结构，并且在不同时间使用来自不同基于范围的块的资源。 无论范围如何，数据业务传输单元可能相同。

公开(公告)号：US20110319114A1

公开(公告)日：2011-12-29

申请号：US12822677

申请日：2010-06-24

Applicant: Saurabh Tavildar ,  Junyi Li ,  Adrian Raja ,  Nilesh Khude

Inventor： Saurabh Tavildar ,  Junyi Li ,  Adrian Raja ,  Nilesh Khude

IPC: H04W74/04 ,  H04W88/02

CPC classification number: H04W16/14 ,  H04W8/005 ,  H04W24/10 ,  H04W72/02 ,  H04W88/02

Abstract: Methods and apparatus related to control channels in a wireless communications system are described. Different white space bands may be available at different locations. A wireless terminal monitors control information from multiple potentially available communications channels. Control time slots corresponding to some different channels are intentionally time offset from one another. Some embodiments implement predetermined control slot timing synchronized with respect to an external timing source. In other embodiments, a wireless terminal selects a control time slot on a new channel as a function of control slot timing on channels already in use. A wireless terminal selects one of a plurality of communications channels for use in communicating information and determines a position of a control time slot to be used on the selected communications channels. The wireless terminal uses the control time slot on the selected communications channel to transmit and receive control information.

Abstract translation: 描述与无线通信系统中的控制信道有关的方法和装置。 不同的空间频段可能在不同的位置可用。 无线终端监视来自多个潜在可用通信信道的控制信息。 对应于一些不同通道的控制时隙有意地彼此间隔。 一些实施例实现相对于外部定时源同步的预定控制时隙定时。 在其他实施例中，无线终端根据已在使用的信道上的控制时隙定时来选择新信道上的控制时隙。 无线终端选择用于传送信息的多个通信信道中的一个，并确定要在所选择的通信信道上使用的控制时隙的位置。 无线终端使用所选择的通信信道上的控制时隙来发送和接收控制信息。

公开(公告)号：US07986648B2

公开(公告)日：2011-07-26

申请号：US11933403

申请日：2007-10-31

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

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

IPC: H04B7/00

CPC classification number: H04L27/2602 ,  H04W72/02 ,  H04W76/10

Abstract: Methods and apparatus implementing communications using different types of symbols, e.g. different characteristic OFDM symbols, at different times for different purposes are described. A first type of symbol is used for control signaling including conveying transmission request signals and/or transmission request response signals. A second type of symbol is used for conveying user data, e.g., traffic signals. The symbol period for a first type symbol is larger than the symbol period for a second type symbol. The tone spacing for a first type symbol is larger than the tone spacing for a second type symbol. The methods and apparatus are well suited for peer to peer communications systems in which a peer to peer communications device operates in a half-duplex mode of operation.

Abstract translation: 实现使用不同类型符号的通信的方法和装置，例如 描述了用于不同目的的不同时间的不同特征OFDM符号。 第一类型的符号用于控制信令，包括传送传输请求信号和/或传输请求响应信号。 第二类型的符号用于传送用户数据，例如业务信号。 第一类型符号的符号周期大于第二类型符号的符号周期。 第一类型符号的音调间距大于第二类型符号的音调间隔。 所述方法和装置非常适合对等通信系统，其中对等通信设备以半双工操作模式操作。