公开(公告)号：US08229369B2

公开(公告)日：2012-07-24

申请号：US12434368

申请日：2009-05-01

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

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

IPC: H04B1/44

CPC classification number: H04L1/0045 ,  H04L1/20 ,  H04L1/201 ,  H04L5/0007 ,  H04L5/0033 ,  H04L5/0058

Abstract: Aspects relate to mitigating interference in a communication network that does not employ a centralized scheduler. A transmission sent on a subset of resources is evaluated to determine a number of communication pairs that have selected that subset of resources on which to transmit. If there are a large number of communication pairs transmitting on that subset, the transmission is ignored by a receiving device. The number of degrees of freedom that contain energy on the subset is evaluated to determine if an expected number of degrees of freedom that should have energy is met or exceeded. If the expected threshold number is met or exceed, the transmission is decoded by the receiving device, else the transmission is not decoded.

Abstract translation: 方面涉及减轻不采用集中式调度器的通信网络中的干扰。 评估在资源子集上发送的传输，以确定已经选择要发送的资源子集的多个通信对。 如果在该子集上有大量的通信对传输，则传输被接收设备忽略。 评估在子集上含有能量的自由度的数量，以确定是否满足或超过应具有能量的预期自由度数。 如果满足或超过预期阈值数，则传输由接收​​设备解码，否则传输不被解码。

公开(公告)号：US08139531B2

公开(公告)日：2012-03-20

申请号：US12168704

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: H04W4/00

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：US20120014471A1

公开(公告)日：2012-01-19

申请号：US12835252

申请日：2010-07-13

Applicant: Sundar Subramanian ,  Aleksandar Jovicic ,  Saurabh Tavildar ,  Junyi Li

Inventor： Sundar Subramanian ,  Aleksandar Jovicic ,  Saurabh Tavildar ,  Junyi Li

IPC: H04B15/00 ,  H04L25/03

CPC classification number: H04L25/03019 ,  H04L25/03343 ,  H04L2025/03414 ,  H04L2025/03477 ,  H04L2025/03484 ,  H04L2025/03566

Abstract: The methods and apparatus described herein are used to operate a wireless device. One method of operating a wireless device includes filtering a first set of digital samples using a first filter at a first time to generate a first signal, transmitting the first signal, filtering a second set of digital samples using a second filter at a second time to generate a second signal, and transmitting the second signal. In one embodiment, an apparatus for operating a wireless device includes a processor configured to filter, at a first wireless device, a first set of digital samples using a first filter at a first time to generate a first signal, transmit, from the first wireless device, the first signal, and filter, at the first wireless device, a second set of digital samples using a second filter at a second time to generate a second signal.

Abstract translation: 本文描述的方法和装置用于操作无线设备。 操作无线设备的一种方法包括：在第一时间使用第一滤波器对第一组数字采样进行滤波，以产生第一信号，发送第一信号，使用第二滤波器在第二时间对第二组数字采样进行滤波 生成第二信号，并发送第二信号。 在一个实施例中，一种用于操作无线设备的装置包括：处理器，被配置为在第一无线设备处，使用第一滤波器在第一时间处理第一组数字样本，以产生第一信号，从第一无线 在第一无线设备处，使用第二滤波器的第二组数字样本在第二无线设备处，第一信号和滤波器产生第二信号。

公开(公告)号：US08005091B2

公开(公告)日：2011-08-23

申请号：US12165815

申请日：2008-07-01

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

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

IPC: H04L12/28

CPC classification number: H04L5/0048 ,  H04L5/0007 ,  H04L5/0091 ,  H04W76/11 ,  H04W76/14

Abstract: An apparatus and method are disclosed for generating a transmission connection identifier (CID) for a transmitter/receiver pair in a wireless network. The CID may be selected from or mapped to a hybrid CID space comprising a first set of orthogonal CIDs and a second set of non-orthogonal (random or pseudo-random) CIDs. When a transmitter device wants to initiate a peer-to-peer connection with a receiver device, the transmitter and receiver devices attempt to obtain a CID to identify their connection within a traffic channel in a shared frequency space. The first and/or second device attempt to select a CID from the first set of orthogonal CIDs. However, if a CID collision is detected, the first and second devices select their CID from the second set of non-orthogonal CIDs. The selected transmission CID may be used during a time slot or interval to facilitate communications between the first and second devices.

Abstract translation: 公开了用于在无线网络中生成用于发射机/接收机对的传输连接标识符（CID）的装置和方法。 可以从包含第一组正交CID和第二组非正交（随机或伪随机）CID的混合CID空间中选择或映射CID。 当发射机设备想要发起与接收机设备的对等连接时，发射机和接收机设备尝试获得CID以在共享频率空间内的业务信道内识别它们的连接。 第一和/或第二设备尝试从第一组正交CID中选择CID。 然而，如果检测到CID冲突，则第一和第二设备从第二组非正交CID中选择它们的CID。 可以在时隙或间隔期间使用所选择的传输CID以促进第一和第二设备之间的通信。

公开(公告)号：US20100309781A1

公开(公告)日：2010-12-09

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: H04L12/24 ,  H04B7/02

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以最大化信噪比，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：US20100202434A1

公开(公告)日：2010-08-12

申请号：US12367293

申请日：2009-02-06

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

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

IPC: H04J3/00

CPC classification number: H04W8/005 ,  H01Q21/205 ,  H04L67/104

Abstract: Methods and apparatus for communicating information, e.g., peer discovery information, to peer communications devices using multiple antenna patterns at different times are described. One exemplary method includes transmitting first peer discovery information during a first period of time using a first antenna pattern, and transmitting second peer discovery information during a second period of time using a second antenna pattern which is different from the first antenna pattern. In at least some embodiments the first antenna pattern is a beam antenna pattern and the second antenna pattern is an omni-directional antenna pattern. In some embodiments, an omni-directional antenna pattern is used at least 50% of the time. This allows devices near the transmitting device to quickly obtain peer discovery information while devices further away make take longer to obtain the peer discovery information since they may need for a beam pattern facing their direction to be used.

Abstract translation: 描述用于在不同时间使用多个天线方式向对等通信设备传送信息（例如对等体发现信息）的方法和装置。 一种示例性方法包括：使用第一天线方向图在第一时段期间发送第一对等设备发现信息;以及使用不同于第一天线方向图的第二天线方向图在第二时段期间发送第二对等设备发现信息。 在至少一些实施例中，第一天线图案是波束天线方向图，而第二天线方向图是全向天线方向图。 在一些实施例中，至少50％的时间使用全向天线方向图。 这允许发射设备附近的设备快速获得对等体发现信息，而远程设备需要更长的时间才能获得对等体发现信息，因为它们可能需要面向其使用方向的波束图案。

公开(公告)号：US20090019173A1

公开(公告)日：2009-01-15

申请号：US12166634

申请日：2008-07-02

Applicant: Xinzhou Wu ,  Saurabh Tavildar ,  Vincent D. Park ,  Junyi Li ,  Rajiv Laroia

Inventor： Xinzhou Wu ,  Saurabh Tavildar ,  Vincent D. Park ,  Junyi Li ,  Rajiv Laroia

IPC: G06F15/16

CPC classification number: H04W72/005

Abstract: Methods and apparatus related to broadcasting data in a peer to peer wireless communications network are described. A timing structure is utilized employing slots of a first type which support broadcast traffic transmissions and unicast traffic transmissions and slots of a second type which support unicast traffic transmission but do not support broadcast traffic transmissions. In various embodiments, traffic air link resource scheduling is performed in a decentralized manner on a slot by slot basis. In some such embodiments, a wireless device prior to transmitting a broadcast data traffic signal, transmits a broadcast transmission request signal, sometimes alternatively referred to as a broadcast indicator signal; and a wireless device prior to transmitting a peer to peer unicast signal, transmits a peer to peer traffic transmission request signal. In various embodiments, for slots of the first type, broadcast transmission requests have priority over peer to peer unicast transmission requests.

Abstract translation: 描述了在对等无线通信网络中与广播数据有关的方法和装置。 使用支持广播业务传输和单播业务传输的第一类型的时隙和支持单播业务传输但不支持广播业务传输的第二类型的时隙的定时结构。 在各种实施例中，在逐个基础上以分散的方式执行业务空中链路资源调度。 在一些这样的实施例中，在发送广播数据业务信号之前的无线设备发送广播传输请求信号，有时可替代地称为广播指示符信号; 以及在发送对等单播信号之前的无线设备，发送对等业务传输请求信号。 在各种实施例中，对于第一类型的时隙，广播传输请求具有优先于对等单播传输请求的优先权。

公开(公告)号：US20090019168A1

公开(公告)日：2009-01-15

申请号：US12165815

申请日：2008-07-01

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

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

IPC: G06F15/16

CPC classification number: H04L5/0048 ,  H04L5/0007 ,  H04L5/0091 ,  H04W76/11 ,  H04W76/14

Abstract: An apparatus and method are disclosed for generating a transmission connection identifier (CID) for a transmitter/receiver pair in a wireless network. The CID may be selected from or mapped to a hybrid CID space comprising a first set of orthogonal CIDs and a second set of non-orthogonal (random or pseudo-random) CIDs. When a transmitter device wants to initiate a peer-to-peer connection with a receiver device, the transmitter and receiver devices attempt to obtain a CID to identify their connection within a traffic channel in a shared frequency space. The first and/or second device attempt to select a CID from the first set of orthogonal CIDs. However, if a CID collision is detected, the first and second devices select their CID from the second set of non-orthogonal CIDs. The selected transmission CID may be used during a time slot or interval to facilitate communications between the first and second devices.

Abstract translation: 公开了用于在无线网络中生成用于发射机/接收机对的传输连接标识符（CID）的装置和方法。 可以从包含第一组正交CID和第二组非正交（随机或伪随机）CID的混合CID空间中选择或映射CID。 当发射机设备想要发起与接收机设备的对等连接时，发射机和接收机设备尝试获得CID以在共享频率空间内的业务信道内识别它们的连接。 第一和/或第二设备尝试从第一组正交CID中选择CID。 然而，如果检测到CID冲突，则第一和第二设备从第二组非正交CID中选择它们的CID。 可以在时隙或间隔期间使用所选择的传输CID以促进第一和第二设备之间的通信。

公开(公告)号：US20090019165A1

公开(公告)日：2009-01-15

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: G06F15/16

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：US20090017801A1

公开(公告)日：2009-01-15

申请号：US12147083

申请日：2008-06-26

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

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

IPC: H04M3/42

CPC classification number: H04W76/11 ,  H04W48/16

Abstract: A first device is configured to select and utilize a connection identifier (CID) for a peer-to-peer communication connection between the first device and a second device in a wireless communications network. The CID is selected from a predetermined set of a plurality of CIDs. Prior to selecting the connection identifier, the first device monitors a CID broadcast channel to determine whether the CID is being utilized by other nearby connections. If it is determined that the CID is being utilized by another connection in the proximity, a different (unused) CID is selected. A transmission request is transmitted to the second device using a first transmission resource unit within a traffic control channel slot, the first transmission resource unit being determined as a function of the selected CID. The first device transmits traffic data to the second device in a traffic channel slot corresponding to the traffic control channel slot.

Abstract translation: 第一设备被配置为选择和利用用于无线通信网络中的第一设备和第二设备之间的对等通信连接的连接标识符（CID）。 CID从预定的多个CID组中选择。 在选择连接标识符之前，第一设备监视CID广播信道以确定CID是否被其他附近的连接利用。 如果确定CID正在邻近的另一连接被使用，则选择不同的（未使用的）CID。 使用业务控制信道时隙内的第一传输资源单元将传输请求发送到第二设备，第一传输资源单元被确定为所选择的CID的函数。 第一设备在对应于业务控制信道时隙的业务信道时隙中向第二设备发送业务数据。