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公开(公告)号：US07414964B2
公开(公告)日：2008-08-19
申请号：US11346261
申请日：2006-02-03
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。
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公开(公告)号：US07031753B2
公开(公告)日：2006-04-18
申请号：US10737772
申请日：2003-12-18
IPC分类号： H04B1/38
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.
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公开(公告)号：US07289427B2
公开(公告)日：2007-10-30
申请号：US11515840
申请日：2006-09-06
IPC分类号： H04J11/00
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.
摘要翻译： 在采用正交频分复用的通信系统中提供了用于纠错的方法和装置。 当远程单元接收到OFDM符号时，检查重传指示符位以确定符号是原始符号还是重传符号。 如果是重传符号，并且远程单元具有存储在存储器中的对应符号，则接收的符号与存储的符号软组合。 符号中的每个数据包，如果是原始的接收到的符号，或者如果被重新发送，则由软组合符号被远程单元检查。 如果远程单元确定特定分组旨在用于远程单元，但是不能确定分组的有效载荷的内容，则远程单元向基站发送重传请求以重传该符号。 基站基于诸如分组的大小或者是否存在对该符号的附加请求的考虑来确定是否应该重传整个符号或仅重新分组。 本发明允许将软符号组合和自动重复请求用作纠错技术。
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公开(公告)号：US06701129B1
公开(公告)日：2004-03-02
申请号：US09670342
申请日：2000-09-27
IPC分类号： H04B1700
CPC分类号： H04L1/0029 , H04L1/0003 , H04L1/0009 , H04L1/0025 , H04L27/2608 , H04W24/00 , H04W28/06 , H04W28/18
摘要： A method is provided for adapting modulation schemes to changing channel quality with reduced overhead signalling. A remote unit measures the channel quality of a radio channel along which a signal from a base station reached the remote unit. Based on the channel quality, the remote unit determines a desired set of transmission parameters from a list of sets of transmission parameters. The remote unit determines a difference in position within the list between the current set of transmission parameters and the desired set of transmission parameters. The remote unit transmits the difference to the base station, which selects a new set of transmission parameters using the current set of transmission parameters and the difference. The method requires little signalling between the remote unit and the base station, and is particularly beneficial in communication systems employing many sub-carriers, such as OFDM systems.
摘要翻译： 提供了一种用于通过减少开销信令使调制方案适应于改变信道质量的方法。 远程单元测量来自基站的信号到达远程单元的无线电信道的信道质量。 基于信道质量，远程单元从传输参数集合的列表确定期望的一组传输参数。 远程单元确定列表内当前传输参数集合与所需传输参数集合之间的位置差异。 远程单元将差异发送到基站，其使用当前传输参数集合和差异来选择新的传输参数集合。 该方法在远程单元和基站之间几乎不需要信令，并且在采用诸如OFDM系统的许多子载波的通信系统中特别有利。
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公开(公告)号：US07110351B2
公开(公告)日：2006-09-19
申请号：US09739367
申请日：2000-12-19
IPC分类号： H04J11/00
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.
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公开(公告)号：US06721569B1
公开(公告)日：2004-04-13
申请号：US09672704
申请日：2000-09-29
IPC分类号： H04Q720
CPC分类号： H04W72/08 , H04L27/2608 , H04W72/0453
摘要： A method and apparatus are provided for selecting and signaling 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 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 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。 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子载波的发射功率可以转移到其他副载波。
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公开(公告)号：US06748222B1
公开(公告)日：2004-06-08
申请号：US09706995
申请日：2000-11-06
IPC分类号： H04Q720
CPC分类号： H04W52/343 , H04W8/24 , H04W16/14 , H04W24/00 , H04W28/08 , H04W28/10 , H04W48/20 , H04W52/262 , H04W52/40
摘要： A method and system for selecting a station, in a communication system having a plurality of stations, for communication with a device based on station load conditions is provided. A plurality of base stations determine their station load condition. Station transmit power level is adjusted for at least a part of a transmitted signal in each of the plurality of stations in accordance with the respective determined station load condition. A device receives the transmitted signal from at least one of the plurality of stations and selects a station for communication. The station selection is made by the device based at least in part on a received power level of the adjusted portion of the transmitted signal.
摘要翻译： 提供了一种用于在具有多个站的通信系统中基于站负载条件与设备通信的站的选择方法和系统。 多个基站确定其站负载状况。 根据相应的确定的站负载条件，对于多个站中的每个站中的发送信号的至少一部分来调整站发射功率电平。 设备从多个站中的至少一个接收发送的信号，并选择一个站进行通信。 至少部分地基于所发送信号的被调整部分的接收功率电平由设备进行站选择。
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8.发明授权Packet communication system with dual candidate sets for independent management of uplink and downlink transmissions 有权具有双候选集的分组通信系统，用于独立管理上行链路和下行链路传输公开(公告)号：US07756520B2
公开(公告)日：2010-07-13
申请号：US09977991
申请日：2001-10-17
IPC分类号： H04W72/00
摘要： A method and apparatus are provided for selecting an optimum base station for communicating with a terminal in a wireless communication system. A base station controller stores two candidate sets for each terminal within communication range of the base stations controlled by the base station controller. One candidate set lists base stations for which the channel quality of the uplink channel between the base station and the terminal is acceptable for communication. The other candidate set lists base stations for which the channel quality of the downlink channel between is acceptable for communication. This allows the base station controller to take into account the predominant direction of traffic when assigning base stations for communication with the terminal.
摘要翻译： 提供一种用于选择用于在无线通信系统中与终端通信的最佳基站的方法和装置。 基站控制器在由基站控制器控制的基站的通信范围内为每个终端存储两个候选集。 一个候选集列出了基站和终端之间的上行链路信道的信道质量可接受用于通信的基站。 另一候选集合列出下行链路信道的信道质量对于通信是可接受的基站。 这允许基站控制器在分配用于与终端通信的基站时考虑业务的主要方向。
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公开(公告)号：US06885679B1
公开(公告)日：2005-04-26
申请号：US09672705
申请日：2000-09-29
CPC分类号： H04L27/2613 , H04L5/0048 , H04L27/2656 , H04L69/324 , H04L69/40
摘要： Methods, receivers and transmitters all adapted to assist in the performance of layer 2 frame delineation are provided which are applicable in the context of OFDM, and also applicable to any layer 1 design facilitating high data rate transmission. Advantageously, the invention allows the identification of where a layer 2 frame begins notwithstanding the fact that the previous layer 2 header, which would normally be used to identify the location of the next layer 2 frame, has been received in error. As a consequence, rather than discarding considerable quantities of data after an erroneous header, for example all data until a super-frame boundary, layer 2 frames can be correctly received staring with the next header received in a non-erroneous layer 1 frame.
摘要翻译： 提供了适用于第2层帧描述的方法，接收机和发射机，其适用于OFDM的上下文，并且也适用于促进高数据速率传输的任何第1层设计。 有利地，本发明允许识别层2帧开始的位置，尽管事实上已经错误地接收了通常用于标识下一层2帧的位置的先前的层2报头。 因此，不是在错误的报头之后丢弃相当大量的数据，例如在超帧边界之前的所有数据，可以使用在非错误层1帧中接收的下一个标题来正确接收第2层的帧。
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10.发明授权公开(公告)号：US06930470B2
公开(公告)日：2005-08-16
申请号：US09797273
申请日：2001-03-01
IPC分类号： H04B1/707 , H04J11/00 , H04L12/28 , H04L12/56 , H04W8/18 , H04W36/06 , H04W36/32 , H04W40/02 , H04W72/06 , H04W76/02 , H04L5/04
CPC分类号： H04W40/02 , H04B2201/709709 , H04J11/0023 , H04W8/22 , H04W36/06 , H04W36/32 , H04W72/02 , H04W76/10
摘要： A method, device and base station for using a code division multiple access carrier for wireless reverse link communication between the device and the base station. An operational profile of the device is determined in which the operational profile includes a degree of unit mobility. A first carrier for wireless code division multiple access communication from the device to the base station is selected based on the determined operational profile of the device. A wireless communication link between the device and the base station is established using the first carrier. According to one aspect, the first carrier is one of an asynchronous code division multiple access signal and a synchronous code division multiple access signal.
摘要翻译： 一种用于在设备和基站之间使用用于无线反向链路通信的码分多址载波的方法，设备和基站。 确定设备的操作简档，其中操作简档包括单位移动性的程度。 基于所确定的设备的操作简档来选择从设备到基站的用于无线码分多址通信的第一载波。 使用第一载波建立设备和基站之间的无线通信链路。 根据一个方面，第一载波是异步码分多址信号和同步码分多址信号之一。
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