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    INTERFERENCE AND NOISE ESTIMATION IN AN OFDM SYSTEM
    1.
    发明授权
    INTERFERENCE AND NOISE ESTIMATION IN AN OFDM SYSTEM 有权

    公开(公告)号：EP1623195B1

    公开(公告)日：2018-11-14

    申请号：EP04752264.4

    申请日：2004-05-14

    申请人： QUALCOMM INCORPORATED

    发明人： SUTIVONG, Arak ,  NAGUIB, Ayman, Fawzy ,  AGRAWAL, Avneesh

    IPC分类号： G01H1/00

    CPC分类号： H04L1/20 ,  H04L27/2647

    摘要： Noise and interference can be independently measured in a multiple user Orthogonal Frequency Division Multiplexing (OFDM) system. Co-channel interference is measured in a frequency hopping, multiple user, OFDM system by tracking the sub-carriers assigned to all users in a particular service area or cell. The composite noise plus interference can be determined by measuring the amount of received power in a sub-carrier whenever it is not assigned to any user in the cell. A value is stored for each sub-carrier in the system and the value of noise plus interference can be a weighted average of the present value with previously stored values. The noise component can be independently determined in a synchronous system. In the synchronous system, all users in a system may periodically be prohibited from broadcasting over a sub-carrier and the received power in the sub-carrier measured during the period having no broadcasts.

    Method and devices for supporting hard handoff
    6.
    发明公开
    Method and devices for supporting hard handoff 审中-公开
    Verfahren und Vorrichtungen zum harten Weiterreichen

    公开(公告)号：EP2482512A2

    公开(公告)日：2012-08-01

    申请号：EP12165838.9

    申请日：2008-07-15

    申请人： Qualcomm Incorporated

    发明人： JI, Tingfang ,  NAGUIB, Ayman Fawzy ,  AGRAWAL, Avneesh

    IPC分类号： H04L27/26 ,  H04W28/06

    CPC分类号： H04W28/06 ,  H04L5/0053 ,  H04L5/0094 ,  H04L27/2602 ,  H04W72/1242 ,  H04W72/14

    摘要： A base station that is configured for supporting hard handoff as well as the corresponding method is described, the method comprises identify a mobile station (120) potentially performing hard handoff to a base station (110), allocate logical resources of the base station (110) to the mobile station (120) prior to the hard handoff and allocate no physical resources of the base station (110) to the mobile station (120) prior to the hard handoff. Also the mobile station (120) and the corresponding method is described.

    摘要翻译： 描述了被配置用于支持硬切换的基站以及相应的方法，所述方法包括：识别潜在地对基站（110）进行硬切换的移动台（120），分配基站（110）的逻辑资源 ）到硬切换之前的移动台（120），并且在硬切换之前不向基站（110）分配物理资源给移动台（120）。 此外，还描述了移动台（120）和相应的方法。

    INTERFERENCE MITIGATION FOR DOWNLINK IN A WIRELESS COMMUNICATION SYSTEM
    7.
    发明公开
    INTERFERENCE MITIGATION FOR DOWNLINK IN A WIRELESS COMMUNICATION SYSTEM 审中-公开
    干扰减少唐氏纽带的无线通信系统

    公开(公告)号：EP2438685A2

    公开(公告)日：2012-04-11

    申请号：EP10737671.7

    申请日：2010-06-04

    申请人： QUALCOMM Incorporated

    发明人： GOROKHOV, Alexei Y. ,  AGRAWAL, Avneesh

    IPC分类号： H04B1/707

    CPC分类号： H04B1/7103 ,  H04B2201/70702

    摘要： Techniques for mitigating interference in a wireless communication system are described. In an aspect, pertinent transmission parameters for a served UE may be sent to at least one interfered UE to support interference mitigation. In one design, information for at least one transmission parameter for a data transmission sent by a first cell to a first UE may be transmitted to at least one UE served by a second cell to enable the at least one UE to perform interference mitigation for the data transmission sent by the first cell to the first UE. The information may be transmitted by either the first cell or the second cell. In another aspect, a cell may send transmission parameters for a UE via a pilot. In yet another aspect, scrambling may be performed by a cell at symbol level to enable an interfered UE to distinguish between modulation symbols of desired and interfering transmissions.

    NULL PILOTS FOR INTERFERENCE ESTIMATION IN A WIRELESS COMMUNICATION NETWORK
    8.
    发明公开
    NULL PILOTS FOR INTERFERENCE ESTIMATION IN A WIRELESS COMMUNICATION NETWORK 有权
    干扰计算零导频在无线通信网络

    公开(公告)号：EP2272295A1

    公开(公告)日：2011-01-12

    申请号：EP09735715.6

    申请日：2009-04-22

    申请人： QUALCOMM Incorporated

    发明人： BHUSHAN, Naga ,  GOROKHOV, Alexei, Y. ,  BORRAN, Mohammad, J. ,  AGRAWAL, Avneesh ,  KHANDEKAR, Aamod, D. ,  JI, Tingfang

    IPC分类号： H04W72/08

    CPC分类号： H04W72/082 ,  H04J11/0059 ,  H04L5/0007 ,  H04L5/0035 ,  H04L5/0048 ,  H04W24/08

    摘要： Techniques for transmitting null pilots to support interference estimation in a wireless network are described. A null pilot is non-transmission on designated time-frequency resources by a cell or a cluster of cells supporting cooperative transmission to a UE. The received power of the null pilot from the cell or cluster of cells may be indicative of interference from other cells. In one design, a cell in the cluster may determine resources for sending a null pilot by the cell. The cell may transmit the null pilot (i.e., send no transmissions) on the resources to allow UEs to estimate out-of-cluster interference. Some or all cells in the cluster may transmit null pilots on the same resources. The cell may receive interference and channel information from the UE and may send data transmission to the UE based on the interference and/or channel information. Remaining cells in the cluster may reduce interference to the UE.

    POWER HEADROOM MANAGEMENT IN WIRELESS COMMUNICATION SYSTEMS
    10.
    发明公开
    POWER HEADROOM MANAGEMENT IN WIRELESS COMMUNICATION SYSTEMS 有权
    DRAHTLOSEN KOMMUNIKATIONSSYSTEMEN的LEISTUNGSRESERVENVERWALTUNG

    公开(公告)号：EP2250841A1

    公开(公告)日：2010-11-17

    申请号：EP09704794.8

    申请日：2009-01-23

    申请人： QUALCOMM Incorporated

    发明人： ATHALYE, Sanjeev Arvind ,  AGRAWAL, Avneesh

    IPC分类号： H04W52/16 ,  H04W52/24 ,  H04W52/36

    CPC分类号： H04W52/16 ,  H04W52/243 ,  H04W52/246 ,  H04W52/367

    摘要： Systems and methodologies are described that facilitate power headroom management in a wireless communication system. As described herein, a predefined relationship between locations along a system frequency band and corresponding power backoff parameters is utilized to minimize spurious emissions outside the system frequency band and/or excessive interference by, for example, associating locations near one or more edges of the permitted frequency band with substantially high power backoff parameters. As further described herein, the predefined relationship can be known a priori to the base station and the mobile terminal.

    摘要翻译： 描述了在无线通信系统中促进功率余量管理的系统和方法。 如本文所述，利用沿着系​​统频带的位置和相应的功率回退参数之间的预定义关系来最小化系统频带外的杂散发射和/或通过例如在允许的一个或多个边缘附近的关联位置的过度干扰 频带具有基本上高功率的退避参数。 如这里进一步描述的，预先确定的关系可以在基站和移动终端之前是已知的。