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    Medium access control (MAC) protocol for a wireless communication system
    1.
    发明授权
    Medium access control (MAC) protocol for a wireless communication system 有权
    用于无线通信系统的媒体接入控制（MAC）协议

    公开(公告)号：US07342901B1

    公开(公告)日：2008-03-11

    申请号：US10115083

    申请日：2002-04-04

    申请人： Hang Zhang ,  Gamini Senarath ,  Mo-Han Fong ,  Bassam Hashem ,  Yoon Chae Cheong

    发明人： Hang Zhang ,  Gamini Senarath ,  Mo-Han Fong ,  Bassam Hashem ,  Yoon Chae Cheong

    IPC分类号： H04Q7/00

    CPC分类号： H04W76/27 ,  H04W28/24 ,  H04W72/00

    摘要： A wireless communication system (100) includes a network (102), one or more mobile stations (103), and a medium access control (MAC) protocol (201). The MAC protocol (201) includes a state transition design (400) and a control channel design (500). The state transition design (400) includes null (401), dormant (402), standby (403), and active states (404) for each mobile station (103). The control channel design (500) includes a common control channel (501), a slow control channel (502) and a fast control channel (503), and is adapted to control communications from the network to each mobile station.

    摘要翻译： 无线通信系统（100）包括网络（102），一个或多个移动站（103）和介质访问控制（MAC）协议（201）。 MAC协议（201）包括状态转换设计（400）和控制信道设计（500）。 状态转换设计（400）包括每个移动台（103）的空（401），休眠（402），待机（403）和活动状态（404）。 控制信道设计（500）包括公共控制信道（501），慢控制信道（502）和快速控制信道（503），并且适于控制从网络到每个移动台的通信。

    Method of controlling base station transmitting power during soft handoff
    2.
    发明申请
    Method of controlling base station transmitting power during soft handoff 有权
    在软切换期间控制基站发射功率的方法

    公开(公告)号：US20050130688A1

    公开(公告)日：2005-06-16

    申请号：US10893842

    申请日：2004-07-19

    申请人： Bassam Hashem ,  Evelyne Strat

    发明人： Bassam Hashem ,  Evelyne Strat

    IPC分类号： H04B7/005 ,  H04B7/00

    CPC分类号： H04W52/40 ,  H04W28/04 ,  H04W36/08 ,  H04W36/18 ,  H04W48/16 ,  H04W52/56 ,  H04W52/60 ,  H04W88/08

    摘要： The method is for sending power control commands in a CDMA cellular radio system from a mobile station to a plurality of base stations with which the mobile station is in soft handoff. The mobile station receiving a signal from each of said base stations determines a power control command based upon the received signals. Such power control command is sent during a plurality of power control groups.

    摘要翻译： 该方法用于将CDMA蜂窝无线电系统中的功率控制命令从移动台发送到与移动台进行软切换的多个基站。 从每个所述基站接收信号的移动站基于所接收的信号确定功率控制命令。 在多个功率控制组期间发送这样的功率控制命令。

    System and method to combine power control commands during soft handoff in DS/CDMA cellular systems
    4.
    发明授权
    System and method to combine power control commands during soft handoff in DS/CDMA cellular systems 有权
    在DS / CDMA蜂窝系统中的软切换期间组合功率控制命令的系统和方法

    公开(公告)号：US06269239B1

    公开(公告)日：2001-07-31

    申请号：US09314531

    申请日：1999-05-19

    申请人： Bassam Hashem ,  Norman Secord ,  Wookwon Lee

    发明人： Bassam Hashem ,  Norman Secord ,  Wookwon Lee

    IPC分类号： H04Q720

    CPC分类号： H04W52/56 ,  H04W24/10 ,  H04W36/08 ,  H04W36/18 ,  H04W52/40 ,  H04W52/60 ,  H04W88/08

    摘要： Mobile stations in communication with several base stations in a cellular CDMA system (as when undergoing soft handoff) do not use the conventional “or of the downs” rule for assessing power control commands from base stations. Mobile stations assess the link quality of the links from the base station. If any base station displays link quality above a predetermined threshold and if that base station is requesting power reduction, power is reduced by a predetermined amount, delta. Otherwise, power is adjusted up or down by an amount less than or equal to delta according to the received power control signals from each base station in conjunction with a weight determined from the signal quality of the link from each base station.

    摘要翻译： 与蜂窝CDMA系统中的几个基站（当进行软切换时）通信的移动站不使用用于评估来自基站的功率控制命令的常规的“或者downs”规则。 移动台评估来自基站的链路的链路质量。 如果任何基站显示高于预定阈值的链路质量，并且如果该基站正在请求功率降低，则功率减小预定量Δ。 否则，根据来自每个基站的接收到的功率控制信号结合从每个基站的链路的信号质量确定的权重，向上或向下调整功率小于或等于Δ的量。

    Enhanced ARQ with OFDM modulation symbols
    5.
    发明申请
    Enhanced ARQ with OFDM modulation symbols 有权

    公开(公告)号：US20070002818A1

    公开(公告)日：2007-01-04

    申请号：US11515840

    申请日：2006-09-06

    申请人： David Steer ,  Shalini Periyalwar ,  Koon Teo ,  Yoon Cheong ,  Bassam Hashem

    发明人： David Steer ,  Shalini Periyalwar ,  Koon Teo ,  Yoon Cheong ,  Bassam Hashem

    IPC分类号： H04J11/00 ,  H04B7/208

    CPC分类号： H04L1/1812 ,  H04L1/1845 ,  H04L1/1867 ,  H04L27/2602

    摘要： A method and apparatus are provided for error correction in a communication system employing Orthogonal Frequency Division Multiplexing. When a remote unit receives an OFDM symbol, a retransmission indicator bit is examined to determine whether the symbol is an original symbol or a retransmitted symbol. If it is a retransmitted symbol and the remote unit has a corresponding symbol stored in memory, then the received symbol is soft-combined with the stored symbol. Each packet in the symbol, either the received symbol if original or the soft-combined symbol if retransmitted, is examined by the remote unit. If the remote unit determines that a particular packet is intended for the remote unit, but can not determine the contents of the payload of the packet, the remote unit sends a retransmission request to the base station for retransmission of the symbol. The base station determines whether the entire symbol or merely the packet should be retransmitted, based on such considerations as the size of the packet or whether there are additional requests for the symbol. The invention allows both soft-symbol combining and Automatic Repeat Request to be used as error correction techniques.

    Dynamic sub-carrier assignment in OFDM systems
    6.
    发明申请
    Dynamic sub-carrier assignment in OFDM systems 有权
    OFDM系统中的动态子载波分配

    公开(公告)号：US20060126493A1

    公开(公告)日：2006-06-15

    申请号：US11346261

    申请日：2006-02-03

    申请人： Bassam Hashem ,  David Steer ,  Shalini Periyalwar

    发明人： Bassam Hashem ,  David Steer ,  Shalini Periyalwar

    IPC分类号： H04J11/00

    CPC分类号： H04W72/08 ,  H04L27/2608 ,  H04W72/0453

    摘要： A method and apparatus are provided for selecting and signalling the identity of sub-carriers to be used for transmission of data in a radio communication system, and for using other sub-carriers. A remote unit determines which sub-carriers are acceptable for use in data transmission by comparing the signal to interference ratio of each sub-carrier with a threshold. A sequence of numbers is generated using one set of values to identify acceptable sub-carriers and another set of values to identify unacceptable sub-carriers. The sequence of numbers is transmitted to a base station. The average signal to interference ratio of sub-carriers whose signal to interference ratio was above the threshold can also be transmitted to the base station, thereby allowing the base station to determine an optimum set of transmission parameters for use only in the acceptable sub-carriers. Alternatively, the remote unit can determine the optimum set of transmission parameters itself for transmission to the base station. As yet another alternative, the remote unit can determine an optimum Link Mode for each acceptable sub-carrier, and use a reference to the Link Modes as the set of values identifying acceptable sub-carriers. The base station transmits data over the acceptable sub-carriers at the optimum Link Mode or Link Modes. The base station may use some of the unacceptable sub-carriers for transmission of low sensitivity data at the optimum Link Mode, and may use some of the unacceptable sub-carriers for transmission of data at a lower Link Mode. The transmission power of any unused unacceptable sub-carriers can be diverted to other sub-carriers.

    摘要翻译： 提供了一种方法和装置，用于选择和发送用于无线电通信系统中的数据传输的子载波的标识，以及用于使用其他子载波。 远程单元通过将每个子载波的信号与干扰比与阈值进行比较来确定哪些子载波可接受用于数据传输。 使用一组值来生成数字序列以识别可接受的子载波，另一组值用于识别不可接受的子载波。 数字序列被发送到基站。 信号干扰比高于阈值的子载波的平均信号干扰比也可以被发送到基站，从而允许基站确定仅在可接受的子载波中使用的最佳传输参数集合 。 或者，远程单元可以确定用于传输到基站的最佳传输参数集合本身。 作为另一替代方案，远程单元可以为每个可接受的子载波确定最佳的链路模式，并且使用对链路模式的引用作为识别可接受的子载波的值的集合。 基站以最佳链路模式或链路模式通过可接受的子载波发送数据。 基站可以使用一些不可接受的子载波用于在最佳链路模式下传输低灵敏度数据，并且可以使用一些不可接受的子载波来传输较低链路模式的数据。 任何未使用的不可接受的副载波的发射功率可以转移到其他副载波。