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    METHOD AND ARRANGEMENT IN A WIRELESS COMMUNICATION SYSTEM
    2.
    发明公开
    METHOD AND ARRANGEMENT IN A WIRELESS COMMUNICATION SYSTEM 有权

    公开(公告)号：EP2534867A4

    公开(公告)日：2016-06-22

    申请号：EP10845910

    申请日：2010-02-11

    Applicant: ERICSSON TELEFON AB L M

    Inventor： HU YANG ,  GAN JIANSONG ,  HAFEEZ ABDULRAUF

    IPC: H04W64/00 ,  G01S5/04 ,  H04W24/02

    CPC classification number: H04W24/02 ,  G01S5/04 ,  H04W64/006

    Abstract: Method and arrangement in a first base station for calculating a first location parameter α of a user equipment in order to improve beamforming accuracy. The first base station and the user equipment are comprised in a Coordinated Multiple Point “CoMP” communication system together with a second base station. The method comprises measuring a signal received from the user equipment, estimating a first parameter value α′ based on the measured signal, obtaining a second parameter value α″, based on an estimated second location parameter &bgr; of the user equipment, estimated at the second base station and calculating the first location parameter α, based on the first estimated parameter value α′ and the obtained second parameter value α″.

    REDUCING INTERFERENCE CAUSED BY AN ATMOSPHERIC DUCT IN A WIRELESS COMMUNICATION SYSTEM
    3.
    发明公开
    REDUCING INTERFERENCE CAUSED BY AN ATMOSPHERIC DUCT IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
    干扰最小BY大气通道在无线通信系统

    公开(公告)号：EP2695479A4

    公开(公告)日：2015-06-03

    申请号：EP11862874

    申请日：2011-04-08

    Applicant: ERICSSON TELEFON AB L M

    Inventor： QIAN YU ,  ASTELY DAVID ,  BEHRAVAN ALI ,  GAN JIANSONG

    IPC: H04W88/08 ,  H04B7/26 ,  H04W28/04

    CPC classification number: H04W24/02 ,  H04B7/2656 ,  H04L1/205 ,  H04W28/04 ,  H04W88/08

    Abstract: A first base station (14) in a wireless communication system (10) operating according to a synchronised time division scheme detects interference of uplink communication, determines the delay of the interference in relation to an own communication structure (CS1), detects aerial interface identifying data of the source of interference identifying a further base station and sends an indication of the further base station interfering uplink communication to the interference handling node (22). The indication is accompanied by identification data comprising aerial interface identifying data of the further base station and distance data determining the distance (D1) between the first and the further base station. The interference handling node (37) receives the indication with accompanying identification data, investigates the identification data in order to determine the identity of a candidate for the further base station and orders the candidate base station to perform an interference limitation activity.

    ADAPTIVE FEEDBACK OF CHANNEL INFORMATION FOR COORDINATED TRANSMISSION ON A WIRELESS BACKHAUL
    5.
    发明申请
    ADAPTIVE FEEDBACK OF CHANNEL INFORMATION FOR COORDINATED TRANSMISSION ON A WIRELESS BACKHAUL 审中-公开
    无线反向协调传输的频道信息自适应反馈

    公开(公告)号：WO2011119140A3

    公开(公告)日：2012-02-02

    申请号：PCT/US2010028096

    申请日：2010-03-22

    Applicant: ERICSSON TELEFON AB L M ,  GAN JIANSONG ,  HOYMANN CHRISTIAN ,  HUI DENNIS

    Inventor： GAN JIANSONG ,  HOYMANN CHRISTIAN ,  HUI DENNIS

    IPC: H04L25/02 ,  H04B7/06 ,  H04B7/155 ,  H04B7/26 ,  H04L1/00

    CPC classification number: H04L1/0026 ,  H04B7/065 ,  H04B7/155 ,  H04L1/003 ,  H04L25/0202 ,  H04L43/08

    Abstract: A backhaul link is established between a base station and a relay that assists the base station in communicating with a mobile device over an access link established between the relay and the mobile device. The channel response of the backhaul link is determined by estimating first and second parts of the backhaul link channel response, the second part changing faster than the first part. The first part of the backhaul link channel response is estimated by calculating an average of the backhaul link channel response over a predetermined period at the relay and the second part is estimated by calculating variation in the backhaul link channel response over the predetermined period at the relay. Quantized versions of the first and second parts of the backhaul link channel response are transmitted from the relay to the base station over the backhaul link.

    Abstract translation: 在基站和中继站之间建立回程链路，协助基站通过在中继站和移动设备之间建立的接入链路与移动设备进行通信。 通过估计回程链路信道响应的第一和第二部分来确定回程链路的信道响应，第二部分比第一部分更快地改变。 回程链路信道响应的第一部分通过计算中继站上的预定时段内的回程链路信道响应的平均值来估计，并且通过计算继电器上的预定周期内的回程链路信道响应的变化来估计第二部分 。 回程链路信道响应的第一和第二部分的量化版本通过回程链路从中继站发送到基站。

    SYSTEMS AND METHOD FOR CANCELING FEEDBACK INTERFERENCE
    6.
    发明申请
    SYSTEMS AND METHOD FOR CANCELING FEEDBACK INTERFERENCE 审中-公开
    消除反馈干扰的系统和方法

    公开(公告)号：WO2010080055A3

    公开(公告)日：2010-10-14

    申请号：PCT/SE2009050013

    申请日：2009-01-12

    Applicant: ERICSSON TELEFON AB L M ,  LARSSON PETER ,  GAN JIANSONG

    Inventor： LARSSON PETER ,  GAN JIANSONG

    IPC: H04B7/155

    CPC classification number: H04B7/15585 ,  H04B7/0617 ,  H04B7/0619

    Abstract: The present application discloses systems and methods for reducing output-to- input feedback signal interference caused by a forwarding node that is configured to forward information received from a transmitter. In some embodiments, this output-to- input feedback signal interference is compensated for by the transmitter. For example, the transmitter is configured such that the signal that is transmitted by transmitter to the forwarding node includes both (1) a primary signal or 'desired' signal (e.g., the signal that is intended for a receiving device) and (2) a filtered version of the primary signal. The filter that produces the filtered version of the primary signal is configured (e.g., the filter's filter weights are adapted) such that the filtered version of the primary signal cancels or reduces the undesired output-to-input feedback signal.

    Abstract translation: 本申请公开了用于减少由转发节点引起的输入 - 输入反馈信号干扰的系统和方法，所述转发节点被配置为转发从发射机接收的信息。 在一些实施例中，该输出至输入反馈信号干扰由发射机补偿。 例如，发射机被配置为使得由发射机发送到转发节点的信号包括（1）主信号或“期望”信号（例如，旨在用于接收设备的信号）和（2） 主信号的滤波版本。 产生主信号的滤波版本的滤波器被配置（例如，滤波器的滤波器权重被适配），使得主信号的滤波版本消除或减少不希望的输出到输入反馈信号。

    AUTOMATIC GUARD PERIOD ADJUSTMENT IN A BASE STATION FOR TIME DIVISION DUPLEXED WIRELESS COMMUNICATIONS
    7.
    发明公开
    AUTOMATIC GUARD PERIOD ADJUSTMENT IN A BASE STATION FOR TIME DIVISION DUPLEXED WIRELESS COMMUNICATIONS 有权
    自动化EINSTELLUNG VON SCHUTZINTERVALLEN DER DRAHTLOSEN ZEITDUPLEX-KOMMUNIKATION

    公开(公告)号：EP2603978A4

    公开(公告)日：2016-10-26

    申请号：EP10855748

    申请日：2010-09-16

    Applicant: ERICSSON TELEFON AB L M

    Inventor： GAN JIANSONG ,  HOYMANN CHRISTIAN ,  LIU YIN

    IPC: H04W72/04 ,  H04W24/02

    CPC classification number: H04W72/082 ,  H04J3/16 ,  H04W24/02 ,  H04W72/0413 ,  H04W72/042 ,  H04W72/0426 ,  H04W72/0486

    Abstract: The present invention is directed to methods for adjusting a guard period in a cellular wireless communication system, to a base station adapted to adjust a guard period, and to a network management entity for adjusting a guard period. One method comprises the steps: obtaining (S1) an indication of at least one downlink frame for an interference measurement; transmitting (S2) during the at least one indicated downlink frame an interference signal; measuring (S3) interference at least during a part of the guard period succeeding the indicated downlink frame; and setting (S4) at least one of an end time of at least one subsequence.

    Abstract translation: 本发明涉及用于调整蜂窝无线通信系统中的保护周期，适用于调整保护周期的基站和用于调整保护周期的网络管理实体的方法。 一种方法包括以下步骤：获得（S1）用于干扰测量的至少一个下行链路帧的指示; 在所述至少一个指示的下行链路帧期间发送（S2）干扰信号; 至少在所指示的下行链路帧之后的保护周期的一部分期间测量（S3）干扰; 以及设置（S4）至少一个子序列的结束时间中的至少一个。

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