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    METHODS AND DEVICES IN COMMUNICATION SYSTEM
    4.
    发明公开
    METHODS AND DEVICES IN COMMUNICATION SYSTEM 有权
    VERFAHREN UND VORRICHTUNGEN IN EINEM KOMMUNIKATIONSSYSTEM

    公开(公告)号：EP2856800A4

    公开(公告)日：2016-06-22

    申请号：EP12877703

    申请日：2012-05-30

    Applicant: ERICSSON TELEFON AB L M

    Inventor： KOORAPATY HAVISH ,  FRENGER PÅL ,  GUEY JIANN-CHING

    IPC: H04W24/02 ,  H04W48/20 ,  H04W52/02 ,  H04W88/10 ,  H04W92/20

    CPC classification number: H04W60/04 ,  H04W24/02 ,  H04W48/14 ,  H04W48/20 ,  H04W88/10 ,  H04W88/12 ,  H04W92/20

    Abstract: The disclosure relates to a method (30) performed in second network node (71, . . . , 7n) of a communication system (1, 1′) adapted for wireless communication and comprising a first network node (31, 32) adapted to operate in a mode of operation according to a first communication standard and a user device (10) adapted to operate according to the first communication standard. The second network node (71, . . . , 7n) is adapted to operate in a mode of operation according to a second communication standard, and adapted to receive uplink signaling in accordance with the first communication standard. The method (30) comprises receiving (31) an access request from the user device (10) in accordance with the first communication standard, and enabling (32) a communication channel for the user device (10) by relaying the received access request to the first network node (31, 32) or by switching from the mode of operation according to the second communication standard, to a mode of operation according to the first communication standard.

    Abstract translation: 本公开涉及在适于无线通信的通信系统（1,1'）的第二网络节点（71，...，7n）中执行的方法（30），包括：第一网络节点（31,32） 以根据第一通信标准的操作模式和适于根据第一通信标准进行操作的用户设备（10）进行操作。 第二网络节点（71，...，7n）适于根据第二通信标准在操作模式下操作，并且适于根据第一通信标准接收上行链路信令。 方法（30）包括根据第一通信标准接收（31）来自用户设备（10）的接入请求，并且通过将接收到的接入请求中继到（32）用户设备（10）的通信信道 第一网络节点（31,32），或者通过根据第二通信标准从操作模式切换到根据第一通信标准的操作模式。

    DELTA MODULATION FOR CHANNEL FEEDBACK IN TRANSMIT DIVERSITY WIRELESS COMMUNICATION SYSTEMS
    6.
    发明公开
    DELTA MODULATION FOR CHANNEL FEEDBACK IN TRANSMIT DIVERSITY WIRELESS COMMUNICATION SYSTEMS 审中-公开
    增量调制对于与发送分集无线通信系统的信道反馈

    公开(公告)号：EP1774690A4

    公开(公告)日：2012-06-06

    申请号：EP05761829

    申请日：2005-07-15

    Applicant: ERICSSON TELEFON AB L M

    Inventor： KOORAPATY HAVISH ,  RAMESH RAJARAM ,  KRASNY LEONID

    IPC: H04L1/12 ,  H04J1/00 ,  H04L1/00 ,  H04L25/02

    CPC classification number: H04B7/0626 ,  H04B7/0641 ,  H04L25/0214 ,  H04L25/0228 ,  H04L25/03343 ,  H04L2025/03802

    Abstract: A method is described herein for reducing the number of feedback bits needed to send channel state information over a feedback channel from a receiving unit (e.g., mobile terminal, base station) to a transmitter unit (e.g., base station, mobile terminal) in a wireless communication system. In the embodiment, the receiver unit is capable of performing the following steps: (1) receiving a pilot signal from a transmit antenna located at a transmitter unit; (2) analyzing a channel tap associated with the transmit antenna and exploiting the temporal correlations of the channel tap to generate the following (i) a delta-modulated feedback bit indicative of a real part of a complex coefficient of the channel tap associated with the transmit antenna and (ii) a delta-modulated feedback bit indicative of an imaginary part of the complex coefficient of the channel tap associated with the transmit antenna; and (3) sending the two feedback bits over a feedback channel to the transmitter unit which analyzes the two feedback bits, and other feedback bits corresponding to other channel taps of this and other transmit antennas, to optimize the subsequent transmission of data to the receiver unit.

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