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    • 4. 发明申请
    • HIERARCHICAL FEEDBACK OF CHANNEL STATE INFORMATION FOR WIRELESS COMMUNICATION
    • 无线通信信道状态信息的分级反馈
    • WO2011017459A2
    • 2011-02-10
    • PCT/US2010/044456
    • 2010-08-04
    • QUALCOMM IncorporatedMALLIK, SiddharthaGOROKHOV, Alexei Y.
    • MALLIK, SiddharthaGOROKHOV, Alexei Y.
    • H04L25/02
    • H04L25/0204H04B7/024H04B7/043H04B7/0626H04L1/0026H04L1/06H04L5/0035H04L25/0242H04L25/0246H04L25/0248H04W24/10
    • Techniques for sending hierarchical feedback of channel state information are described. In one design, a user equipment (UE) determines channel gain information for multiple cells selectable to transmit data to the UE. The UE also determines intra-cell relative phase information for at least one cell among the multiple cells. The UE reports the channel gain information and the intra-cell relative phase information. The channel gain information may include multiple quantized channel vectors for each of the multiple cells. The intra-cell relative phase information may indicate phase errors in the quantized channel vectors for each of the at least one cell. The UE may also determine and report other information. The UE may receive data from one or more cells among the plurality of cells. Each cell may transmit data based on at least one transmit vector determined based on the channel gain information and the intra-cell relative phase information.
    • 描述了用于发送信道状态信息的分层反馈的技术。 在一种设计中,用户设备(UE)确定可选择用于向UE发送数据的多个小区的信道增益信息。 UE还确定多个小区中的至少一个小区的小区内相对相位信息。 UE上报信道增益信息和小区内相对相位信息。 信道增益信息可以包括用于多个小区中的每一个的多个量化信道向量。 小区内相对相位信息可以指示针对至少一个小区中的每一个的量化信道向量中的相位误差。 UE还可以确定并报告其他信息。 UE可以从多个小区中的一个或多个小区接收数据。 每个小区可以基于基于信道增益信息和小区内相对相位信息确定的至少一个发射向量来发送数据。
    • 5. 发明申请
    • METHOD AND APPARATUS FOR CHANNEL ESTIMATION USING MULTIPLE DESCRIPTION CODES
    • 使用多种描述码的信道估计的方法和装置
    • WO2010080231A1
    • 2010-07-15
    • PCT/US2009/066031
    • 2009-11-29
    • QUALCOMM IncorporatedMALLIK, SiddharthaGOROKHOV, Alexei Y.
    • MALLIK, SiddharthaGOROKHOV, Alexei Y.
    • H04L25/02H04B7/02H04L1/00
    • H04L1/0035H04B7/0417H04B7/0626H04B7/0639H04L25/0242
    • Techniques for using multiple description codes (MDC) for channel feedback to improve channel estimation accuracy are described. A receiver may obtain an initial/ measured channel vector for a communication channel. The receiver may select a codebook in a set of codebooks for quantizing the initial channel vector. Each codebook may include a different set of channel vectors/codewords. Different codebooks may be selected in different reporting intervals. The receiver may select a channel vector in the selected codebook, and the selected channel vector may have (i) a largest correlation with a normalized channel vector or (ii) a smallest distance to the initial channel vector. The receiver may send the selected channel vector and possibly the selected codebook to a transmitter. The transmitter may receive the selected/ reported channel vectors from the receiver in different reporting intervals and may derive a final channel vector for the communication channel based on the reported channel vectors.
    • 描述了使用多个描述码(MDC)进行信道反馈以提高信道估计精度的技术。 接收机可以获得通信信道的初始/测量信道向量。 接收机可以在一组码本中选择用于量化初始信道向量的码本。 每个码本可以包括不同的信道向量/码字集合。 可以在不同的报告间隔中选择不同的码本。 接收机可以选择所选码本中的信道向量,并且所选择的信道向量可以具有(i)与归一化信道向量的最大相关性或(ii)到初始信道向量的最小距离。 接收机可以将所选择的信道向量和可能的所选码本发送到发射机。 发射机可以在不同的报告间隔中从接收机接收所选/报告的信道向量,并且可以基于报告的信道向量导出通信信道的最终信道向量。
    • 9. 发明申请
    • HYBRID MODES FOR PEER DISCOVERY
    • 混合模式发现
    • WO2012006446A1
    • 2012-01-12
    • PCT/US2011/043226
    • 2011-07-07
    • QUALCOMM INCORPORATEDMALLIK, SiddharthaPALANKI, RaviMALLADI, Durga PrasadBHUSHAN, Naga
    • MALLIK, SiddharthaPALANKI, RaviMALLADI, Durga PrasadBHUSHAN, Naga
    • H04W8/00H04L29/08
    • H04L67/104H04L67/1063H04L67/1068H04W8/005
    • Techniques for performing peer discovery in a wireless network are described. A device may perform peer discovery to detect and identify other devices of interest. In an aspect, the device may perform peer discovery based on a hybrid mode that includes autonomous peer discovery and network-assisted peer discovery. In another aspect, the device may perform peer discovery based on a push mode and a pull mode. For the push mode, the device may occasionally transmit and/or receive a peer detection signal. For the pull mode, the device may transmit and/or receive a peer discovery request when triggered. In yet another aspect, the device may perform event-triggered peer discovery (e.g., for the pull mode). In yet another aspect, the device may perform peer discovery using both a downlink spectrum and an uplink spectrum. In yet another aspect, the device may transmit a peer detection signal in a manner to improve detection and/or increase payload.
    • 描述了在无线网络中执行对等体发现的技术。 设备可以执行对等体发现以检测和识别感兴趣的其他设备。 在一方面,设备可以基于包括自主对等体发现和网络辅助对等体发现的混合模式来执行对等体发现。 在另一方面,设备可以基于推模式和拉模式来执行对等体发现。 对于推送模式,设备可能偶尔发送和/或接收对等体检测信号。 对于拉模式,当触发时,设备可以发送和/或接收对等体发现请求。 在另一方面,设备可以执行事件触发对等体发现(例如,用于拉模式)。 在另一方面,设备可以使用下行链路频谱和上行链路频谱来执行对等体发现。 在另一方面,设备可以以改进检测和/或增加有效载荷的方式发送对等检测信号。
    • 10. 发明申请
    • NETWORK-ASSISTED PEER DISCOVERY
    • 网络辅助的对等体发现
    • WO2011130623A2
    • 2011-10-20
    • PCT/US2011/032676
    • 2011-04-15
    • QUALCOMM INCORPORATEDMALLIK, SiddharthaWANG, RenqiuPALANKI, RaviBHUSHAN, Naga
    • MALLIK, SiddharthaWANG, RenqiuPALANKI, RaviBHUSHAN, Naga
    • H04W8/00
    • H04L67/1063G06F17/3005H04L67/1061H04L67/1068H04W8/005H04W76/14H04W84/18
    • Techniques for performing network-assisted peer discovery to enable peer-to-peer (P2P) communication are described. In one design, a device registers with a network entity (e.g., a directory agent) so that the presence of the device and possibly other information about the device can be made known to the network entity. The network entity collects similar information from other devices. The device sends a request to the network entity, e.g., during or after registration. The request includes information used to match the device with other devices, e.g., information about service(s) provided by the device and/or service(s) requested by the device. The directory agent matches requests received from all devices, determines a match between the device and at least one other device, and sends a notification to perform peer discovery. The device performs peer discovery in response to receiving the notification from the network entity.
    • 描述了用于执行网络辅助对等体发现以启用对等(P2P)通信的技术。 在一种设计中,设备向网络实体(例如,目录代理)注册,使得该设备的存在和可能的关于设备的其他信息可以被网络实体知道。 网络实体收集来自其他设备的类似信息。 设备例如在注册期间或之后向网络实体发送请求。 该请求包括用于将设备与其他设备进行匹配的信息,例如,关于设备提供的服务和/或设备请求的服务的信息。 目录代理匹配从所有设备接收到的请求,确定设备与至少一个其他设备匹配,并发送通知以执行对等方发现。 该设备响应于从网络实体接收到通知而执行对等体发现。