中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

28 records (took 0.034 seconds)

    Method and apparatus for uplink communication in cellular communication system
    11.
    发明专利
    Method and apparatus for uplink communication in cellular communication system 有权
    蜂窝通信系统中上行链路通信的方法与装置

    公开(公告)号：JP2006087116A

    公开(公告)日：2006-03-30

    申请号：JP2005268258

    申请日：2005-09-15

    Applicant: Motorola Inc ,  モトローラ・インコーポレイテッドMotorola Incorporated

    Inventor： LOVE ROBERT T ,  GHOSH AMITAVA ,  RATASUK RAPEEPAT ,  WHINNETT NICK W

    IPC: H04W36/18 ,  H04W72/04 ,  H04W72/12 ,  H04W84/04 ,  H04W88/08

    CPC classification number: H04W72/0406 ,  H04W36/18 ,  H04W84/042 ,  H04W88/08

    Abstract: PROBLEM TO BE SOLVED: To provide an efficient signal system for supporting the high speed uplink packet access service (HSUPA) for relieving a resource usage amount and an arithmetic processing load.
    SOLUTION: A cellular communication system (100) comprises a first base station (103) which schedules resource for a user equipment (101). When receiving a resource allocation message, the user equipment (101) transmits a first message comprising a transmit indication to a plurality of base stations (103 to 109) wherein the transmit indication is indicative of a subsequent transmission of a second message. The user equipment (101) then proceeds to determine a transmit format for the second message; and to transmit the second message to the plurality of base stations (103 to 109). When receiving the transmit indication, the plurality of base stations (103 to 109) proceed to configure their receivers to receive the second message. The first message may be transmitted in a control channel and the second message may be transmitted in a user data channel.
    COPYRIGHT: (C)2006,JPO&NCIPI

    Abstract translation: 要解决的问题：提供一种用于支持高速上行链路分组接入服务（HSUPA）的有效信号系统，用于减轻资源使用量和算术处理负载。 蜂窝通信系统（100）包括对用户设备（101）调度资源的第一基站（103）。 当接收到资源分配消息时，用户设备（101）向多个基站（103至109）发送包括发射指示的第一消息，其中发送指示指示第二消息的后续发送。 用户设备（101）然后继续确定第二消息的发送格式; 并将所述第二消息发送到所述多个基站（103〜109）。 当接收到发送指示时，多个基站（103至109）继续配置其接收机以接收第二消息。 可以在控制信道中发送第一消息，并且可以在用户数据信道中发送第二消息。 版权所有（C）2006，JPO＆NCIPI

    Noise measurement to detect a request for retransmission in a cellular communication system
    13.
    发明专利
    Noise measurement to detect a request for retransmission in a cellular communication system 未知

    公开(公告)号：GB2432086A

    公开(公告)日：2007-05-09

    申请号：GB0522206

    申请日：2005-11-01

    Applicant: MOTOROLA INC

    Inventor： WHINNETT NICK W

    IPC: H04L1/18 ,  H04B1/10 ,  H04B7/26

    Abstract: A detection processor (203) detects retransmission feedback messages (ACK or NACK) in response to a detection threshold. A threshold processor (207) determines the detection threshold in response to a noise estimate generated by a noise processor (209). The noise processor comprises a sub-symbol generator (211) which divides a retransmission feedback symbol into a plurality of sub-symbols. Each of the sub-symbols is despread by a spreading code with a lower spreading factor than a spreading factor of the retransmission feedback symbol. A difference generator (213) then generates difference symbol values between sub-symbols and a noise estimator (215) generates the noise estimate in response to the difference symbol values, for example by determining the variance of the difference symbol values. An improved noise estimate may be determined resulting in improved detection performance and thus improved retransmission performance. Application to 3G cellular systems using CDMA and hybrid ARQ.

    Retransmission in a cellular communication system
    15.
    发明专利
    Retransmission in a cellular communication system 未知

    公开(公告)号：GB2432086B

    公开(公告)日：2007-12-12

    申请号：GB0522206

    申请日：2005-11-01

    Applicant: MOTOROLA INC

    Inventor： WHINNETT NICK W

    IPC: H04L1/18 ,  H04B1/10 ,  H04B7/26

    Abstract: An apparatus comprises a detection processor (203) for detecting retransmission feedback messages in response to a detection threshold. A threshold processor (207) determines the detection threshold in response to a noise estimate generated by a noise processor (209). The noise processor comprises a sub-symbol generator (211) which divides a retransmission feedback symbol into a plurality of sub-symbols. Each of the sub-symbols is despread by a spreading code with a lower spreading factor than a spreading factor of the retransmission feedback symbol. A difference generator (213) then generates difference symbol values between the plurality of sub-symbols and a noise estimator (215) generates the noise estimate in response to the difference symbol values, for example by determining the variance of the difference symbol values. An improved noise estimate may be determined resulting in improved detection performance and thus improved retransmission performance.

    Satisfying a delay requirement for a delay sensitive data connection
    17.
    发明专利
    Satisfying a delay requirement for a delay sensitive data connection 未知

    公开(公告)号：GB2465927A

    公开(公告)日：2010-06-09

    申请号：GB201004968

    申请日：2006-06-30

    Applicant: MOTOROLA INC

    Inventor： WANG FAN ,  GHOSH AMITAVA ,  RATASUK RAPEEPAT ,  WHINNETT NICK W ,  XIAO WEIMIN

    IPC: H04L12/56

    Abstract: A method to satisfy a delay requirement for a delay sensitive data connection through a scheduling, the method comprising: setting a discard timer for the delay sensitive data connection; determining an age of a packet corresponding to the delay sensitive service in a priority queue; performing a comparison between the age of a most recently successfully transmitted or time expired data packet with the discard timer setting, to determine whether the age of the compared packet is less than the discard timer setting by a predetermined margin; and calculating a new delay factor for the delay sensitive data connection based on the comparison and an old delay factor of the delay sensitive data connection. Aspects of the invention include the calculating step further comprising setting the new delay factor to a value obtained by increasing the old delay factor by a first predetermined factor and dropping the oldest packet if the age of the oldest packet is not less than the discard timer by a predetermined margin.

    Method and apparatus for determining beamforming weights for an antenna array
    20.
    发明专利
    Method and apparatus for determining beamforming weights for an antenna array 未知

    公开(公告)号：GB2450522A

    公开(公告)日：2008-12-31

    申请号：GB0712533

    申请日：2007-06-29

    Applicant: MOTOROLA INC

    Inventor： WHINNETT NICK W

    IPC: H04B7/06 ,  H04B7/185 ,  H04L1/06

    Abstract: A beamforming processor (133) determines responses for transmit elements (109-115) and receive elements (125-131) for each antenna elements (101-107) of an antenna array. A channel response processor (205) estimates a channel response for each propagation channel between one of the plurality of antenna elements (101-107) and a remote station in response to a signal received from the remote station. A receive compensation processor (207) compensates the channel responses for the receive elements (125-131) but not the transmit elements (109-115). An Eigen beamforming processor (209) then executes an Eigen beamforming algorithm based on the compensated channel responses. The resulting beamform weights are then compensated for the response of the transmit elements (109-115) in a transmit compensation processor (211). By using a separated two stage compensation for responses of the receive elements (125-131) and the transmit elements (109-115), improved beamforming based on Eigen beamforming can be achieved.

Patent Agency Ranking