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    NETWORK-CENTRIC LINK ADAPTATION FOR COORDINATED MULTIPOINT DOWNLINK TRANSMISSION
    32.
    发明公开
    NETWORK-CENTRIC LINK ADAPTATION FOR COORDINATED MULTIPOINT DOWNLINK TRANSMISSION 审中-公开
    维多利亚州VERBINDUNGSADAPTIONFÜRKOORDINIERTE MEHRPUNKT-ABWÄRTSÜBERTRAGUNG

    公开(公告)号：EP2441198A1

    公开(公告)日：2012-04-18

    申请号：EP10733038.3

    申请日：2010-06-09

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： ZANGI, Kambiz ,  HAFEEZ, Abdulrauf ,  HUI, Dennis

    IPC分类号： H04L1/00

    CPC分类号： H04L1/0001 ,  H04J11/0053 ,  H04L1/0022 ,  H04L1/0034 ,  H04L5/0035

    摘要： A Coordinated MultiPoint (CoMP) cell controller performs network-centric link adaptation for User Equipment (UE) in the CoMP cell. The CoMP cell controller receives at least infrequent channel estimates from a UE in the CoMP cell, from which it estimates downlink channel and thermal noise at the UE. The CoMP cell controller is aware of the desired signal to be received at the UE, and the intra-CoMP cell interference to the UE caused by transmissions to other UEs in the CoMP cell. The CoMP cell receives from the UE reports of inter-CoMP cell interference caused by transmissions by other CoMP cells. Based on the downlink channel quality, the desired signal, the intra-CoMP cell interference, the inter-CoMP cell interference, and the thermal noise, the CoMP cell controller performs link adaptation by selecting modulation and coding schemes, and other transmission parameters, for an upcoming transmission duration (such as a TTI).

    摘要翻译： 协调多点（CoMP）小区控制器在CoMP小区中为用户设备（UE）执行以网络为中心的链路自适应。 CoMP小区控制器在CoMP小区中从UE接收至少频繁的信道估计，从​​其估计UE处的下行链路信道和热噪声。 CoMP小区控制器知道将在UE处接收的期望信号，以及由CoMP小区中的其他UE的传输引起的对UE的CoMP小区干扰。 CoMP小区从UE接收到由其他CoMP小区的传输引起的CoMP间干扰的报告。 基于下行链路信道质量，期望信号，CoMP间小区干扰，CoMP间干扰和热噪声，CoMP小区控制器通过选择调制和编码方案以及其他传输参数来执行链路自适应，用于 即将到来的传输持续时间（如TTI）。

    CHANNEL STATE INFORMATION RECONSTRUCTION FROM SPARSE DATA
    33.
    发明公开
    CHANNEL STATE INFORMATION RECONSTRUCTION FROM SPARSE DATA 有权
    EffizienteKanalschätzungunter Verwendung von nicht-äquidistantenCSI-Abtastwerten

    公开(公告)号：EP2422456A2

    公开(公告)日：2012-02-29

    申请号：EP10720464.6

    申请日：2010-04-23

    申请人： Telefonaktiebolaget LM Ericsson (publ)

    发明人： CHENG, Jung-Fu ,  ZANGI, Kambiz ,  HUI, Dennis ,  KRASNY, Leonid

    IPC分类号： H04B7/04 ,  H04L1/00 ,  H04B7/06

    CPC分类号： H04B17/0047 ,  H04B7/024 ,  H04B7/0626 ,  H04B7/0639 ,  H04B17/336 ,  H04B17/364 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/20 ,  H04L25/0212 ,  H04L25/022 ,  H04L25/0224

    摘要： Accurate downlink channe! estimates are catenated based on infrequently transmitted Channel State information (CS!) feedback data from a UE 20. A plurality of non-uniformly spaced digital CSI feedback samples, representing the frequency response of a downlink communication channel, is received from the UE, The received CS! feedback samples are demodulated and inverse quantized. A time domain tap deiay channel model is generated from the inverse quantized CSI feedback samples. The time domain tap delay channe! model may be frequency-transformed to obtain a reconstructed frequency response of the downlink communication channel in the frequency domain. Alternatively, channel delays may be estimated based on prior delays and/or known references signals transmitted on the uplink. Channel estimates between CS! reporting instances may be predicted, such as by a sample & hold or a linear predictor. The delays may be presumed fixed, and Kalman filter coefficients evolved over time.

    摘要翻译： 无线通信网络中的UE向网络发送简洁的直接信道状态信息，实现诸如联合处理之类的协调多点计算，而基本上不增加上行链路开销。 UE根据与网络同步的方案选择的一组非均匀间隔的子载波上接收和处理参考符号。 常规地估计每个选择的子载波的频率响应，并且在上行链路控制信道上量化并发送到网络。 非均匀子载波选择可以以各种方式与网络同步。