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1.发明授权Method and apparatus for a rate control in a high data rate communication system 有权高数据速率通信系统中速率控制的方法和装置公开(公告)号：US07417957B2
公开(公告)日：2008-08-26
申请号：US10808939
申请日：2004-03-24
CPC分类号： H04L1/0021 , H04L1/0002 , H04L1/0016 , H04L1/002 , H04L1/0025 , Y02D50/10
摘要： A method and an apparatus for rate control in a high data rate (HDR) communication system are disclosed. An exemplary HDR communication system defines a set of data rates, at which an access point (AP) may send data packets to an access terminal (AT). The data rate is selected to maintain targeted packet error rate (PER). The AT's open loop algorithm measures received signal to interference and noise ratio (SINR) at regular intervals, and uses the information to predict an average SINR over the next packet duration. The AT's closed loop algorithm measures a packet error rate (PER) of the received signal, and uses the PER to calculate a closed loop correction factor. The loop correction factor is added to the SINR value predicted by the open loop, resulting in an adjusted SINR.
摘要翻译： 公开了一种用于高数据速率（HDR）通信系统中的速率控制的方法和装置。 示例性HDR通信系统定义了一组数据速率，接入点（AP）可在该组数据速率上向接入终端（AT）发送数据分组。 选择数据速率以维持目标分组错误率（PER）。 AT的开环算法以规则的间隔测量接收信号与干扰和噪声比（SINR），并且使用该信息来预测下一个分组持续时间内的平均SINR。 AT的闭环算法测量接收信号的分组错误率（PER），并使用PER计算闭环校正因子。 循环校正因子加到由开环预测的SINR值，得到调整后的SINR。
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公开(公告)号：US06377607B1
公开(公告)日：2002-04-23
申请号：US09311793
申请日：1999-05-13
IPC分类号： H04B169
CPC分类号： H03M13/6337 , H03M13/2957 , H03M13/658 , H04L1/20
摘要： An efficient telecommunications receiver system for accurately decoding a received composite signal having a data signal component and a pilot signal component. The receiver system includes a first circuit for receiving the composite signal and extracting a pilot signal and a data signal from received composite signal. A second circuit calculates a log-likelihood ratio as a function of a channel estimate based on the pilot signal. A third circuit scales the log-likelihood ratio by a predetermined log-likelihood ratio scaling factor and provides an accurate log-likelihood value in response thereto. A fourth circuit decodes the received composite signal based on the accurate log-likelihood value and the data signal. In a specific embodiment, the pilot signal and the data signal comprise pilot samples and data samples, respectively. The third circuit includes a carrier signal-to-interference ratio circuit for computing a first signal-to-interference ratio and a second signal-to-interference ratio based partly on the pilot signal. The first signal-to-interference ratio is based on the data samples, and the second signal-to-interference ratio is based on the pilot samples. The first signal-to-noise ratio and the second signal-to-noise ratio provide input to a circuit for computing the predetermined log-likelihood ratio scaling factor that is included in the third circuit. In a more specific embodiment, the first circuit includes a despreader for despreading the received composite signal in accordance with a predetermined spreading function and providing a despread signal in response thereto. The spreading function is a pseudo noise sequence or a Walsh function. The first circuit further includes a decovering circuit that extracts the pilot signal and the data signal from the despread signal. In the illustrative embodiment, the accurate receiver system further includes a circuit for generating a rate and/or power control message and transmitting the rate and/or power control message to an external transceiver in communication with the efficient receiver system.
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3.发明授权公开(公告)号：US07440431B2
公开(公告)日：2008-10-21
申请号：US10834605
申请日：2004-04-28
IPC分类号： H04Q7/00
CPC分类号： H04L1/0002
摘要： A method and an apparatus for adaptive data rate selection in a high data rate (HDR) communication system are disclosed. An exemplary HDR communication system defines a set of data rates, at which an access point (AP) may transmit data packets to an access terminal (AT). The transmission data rate is selected to maintain target packet error rate (PER). Each AT monitors signal quality metric of signals received from APs. An AT receiving forward link signals from multiple ATs identifies the AT associated with the highest quality forward link signal.
摘要翻译： 公开了一种在高数据速率（HDR）通信系统中进行自适应数据速率选择的方法和装置。 示例性HDR通信系统定义了一组数据速率，接入点（AP）可在该组数据速率上向接入终端（AT）发送数据分组。 选择传输数据速率以维持目标分组错误率（PER）。 每个AT监视从AP接收的信号的信号质量度量。 从多个AT接收前向链路信号的AT识别与最高质量的前向链路信号相关联的AT。
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4.发明授权Method and apparatus for fast closed-loop rate adaptation in a high rate packet data transmission 有权用于在高速率分组数据传输中快速闭环速率适配的方法和装置公开(公告)号：US07245594B1
公开(公告)日：2007-07-17
申请号：US09570210
申请日：2000-05-12
IPC分类号： H04B7/212
摘要： In a high data rate communication system capable of variable rate transmission, an open loop rate control can be adjusted with a closed loop rate control to maximize throughput. An access point generates interleaved multi-slot packets that allow an access terminal to transmit indicator messages to the access point in accordance with recently received data carried within slots of the multi-slot packets.
摘要翻译： 在能够进行可变速率传输的高数据速率通信系统中，可以通过闭环速率控制来调整开环速率控制以最大化吞吐量。 接入点产生交错多时隙分组，其允许接入终端根据在多时隙分组的时隙内承载的最近接收的数据向接入点发送指示符消息。
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5.发明授权Method and apparatus for a rate control in a high data rate communication system 有权高数据速率通信系统中速率控制的方法和装置公开(公告)号：US06751199B1
公开(公告)日：2004-06-15
申请号：US09556769
申请日：2000-04-24
IPC分类号： H04L1226
CPC分类号： H04L1/0021 , H04L1/0002 , H04L1/0016 , H04L1/002 , H04L1/0025 , Y02D50/10
摘要： A method and an apparatus for rate control in a high data rate (HDR) communication system are disclosed. An exemplary HDR communication system defines a set of data rates, at which an access point (AP) may send data packets to an access terminal (AT). The data rate is selected to maintain targeted packet error rate (PER). The AT's open loop algorithm measures received signal to interference and noise ratio (SINR) at regular intervals, and uses the information to predict an average SINR over the next packet duration. The AT's closed loop algorithm measures a packet error rate (PER) of the received signal, and uses the PER to calculate a closed loop correction factor. The loop correction factor is added to the SINR value predicted by the open loop, resulting in an adjusted SINR. The AT maintains a look up table, which comprises a set of SINR thresholds that represent a minimum SINR necessary to successfully decode a packet at each data rate. The AT uses the adjusted set of SINR thresholds in the look up table to select the highest data rate, the SINR threshold of which is below the predicted SINR. The AT then requests, over the reverse link, that the AP send the next packet at this data-rate.
摘要翻译： 公开了一种用于高数据速率（HDR）通信系统中的速率控制的方法和装置。 示例性HDR通信系统定义了一组数据速率，接入点（AP）可在该组数据速率上向接入终端（AT）发送数据分组。 选择数据速率以维持目标分组错误率（PER）。 AT的开环算法以规则的间隔测量接收信号与干扰和噪声比（SINR），并且使用该信息来预测下一个分组持续时间内的平均SINR。 AT的闭环算法测量接收信号的分组错误率（PER），并使用PER计算闭环校正因子。 循环校正因子加到由开环预测的SINR值，得到调整后的SINR。 AT维护查找表，其包括一组SINR阈值，其表示在每个数据速率下成功解码分组所需的最小SINR。 AT在查找表中使用调整后的SINR阈值组来选择SINR阈值低于预测SINR的最高数据速率。 AT然后通过反向链路请求AP以该数据速率发送下一个分组。
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公开(公告)号：US06687510B2
公开(公告)日：2004-02-03
申请号：US09832671
申请日：2001-04-11
IPC分类号： H04B700
CPC分类号： H04W52/265 , H04W52/225 , H04W52/226 , H04W52/228 , H04W52/267 , H04W52/32 , H04W52/343 , H04W52/346 , H04W52/50
摘要： A method and apparatus that determines how much power to allocate to each of a plurality of reverse link power control (RLPC) Channels to be transmitted from a base station, based upon data rate control (DRC) messages transmitted to the base station. Historical information is used to determine the quality of the Forward Link over which the RLPC is to be transmitted. If the history of the DRCs received indicates that the remote station to which the RLPC Channel is to be directed has not transmitted a DRC recently, then the base station allocates power to the RLPC Channels based upon information provided to the base station in DRCs that were received by the base station, but that were directed to other base stations. Accordingly, the base station can allocate power among the RLPC Channels without having received explicit information as to the quality of the Forward Link between the base station and every remote station intended to receive the information on the RLPC Channels.
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7.发明授权Method and apparatus for transmitting reverse link power control signals based on the probability that the power control command is in error 有权基于功率控制命令错误的概率发送反向链路功率控制信号的方法和装置公开(公告)号：US06208873B1
公开(公告)日：2001-03-27
申请号：US09198320
申请日：1998-11-23
IPC分类号： H04Q720
摘要： A method and apparatus for controlling the transmit power of a plurality of mobile radio units transmitting to a base station in a mobile radio telephone system. For each of the mobile units in the system, a signal strength estimate is measured at the base station based on reverse link signals sent from the mobile units and received at the base station, wherein each signal strength estimate is associated with one of the mobile units. The signal strength estimate associated with each mobile unit is compared to a threshold. Next, for each mobile unit in the plurality of mobile units, if the signal strength estimate associated with the mobile unit is greater than the threshold, then a power control bit having a first value is assigned to the mobile unit; conversely, if the signal strength estimate associated with the mobile unit is less than the threshold, then a power control bit having a second value is assigned to the mobile unit. A variable gain that is a function of the difference between the signal strength estimate associated with the mobile unit and the threshold is next applied to each power control bit. The variable gain applied to each power control bit increases as the magnitude of the difference between the signal strength estimate associated with the mobile unit and the threshold increases. Each gain-adjusted power control bit is then transmitted to the mobile units.
摘要翻译： 一种用于控制向移动无线电话系统中的基站发送的多个移动无线电单元的发射功率的方法和装置。 对于系统中的每个移动单元，基于从移动单元发送并在基站处接收的反向链路信号在基站处测量信号强度估计，其中每个信号强度估计与移动单元之一相关联 。 将与每个移动单元相关联的信号强度估计与阈值进行比较。 接下来，对于多个移动单元中的每个移动单元，如果与移动单元相关联的信号强度估计大于阈值，则将具有第一值的功率控制比特分配给移动单元; 相反，如果与移动单元相关联的信号强度估计小于阈值，则将具有第二值的功率控制位分配给移动单元。 作为与移动单元相关联的信号强度估计之间的差异与阈值的函数的可变增益接下来应用于每个功率控制位。 施加到每个功率控制位的可变增益随着与移动单元相关联的信号强度估计与阈值之间的差值的大小增加而增加。 然后将每个增益调整功率控制位传送到移动单元。
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8.发明授权Method and apparatus for variable and fixed forward link rate control in a mobile radio communications system 有权用于移动无线电通信系统中可变和固定的前向链路速率控制的方法和装置公开(公告)号：US06205129B1
公开(公告)日：2001-03-20
申请号：US09231743
申请日：1999-01-15
申请人： Eduardo A. S. Esteves , Rajesh Pankaj , Peter J. Black , Matthew S. Grob , Nagabhushana T. Sindhushayana
发明人： Eduardo A. S. Esteves , Rajesh Pankaj , Peter J. Black , Matthew S. Grob , Nagabhushana T. Sindhushayana
IPC分类号： H04B7212
CPC分类号： H04W28/22 , H04L1/0002 , H04L1/0036 , H04L2001/0092 , H04W36/18
摘要： A method and apparatus for controlling a data rate associated with the transmission of information from a base station to a mobile station in a mobile radio communication system. The mobile station alternately receives information from a base station either in a variable rate mode or a fixed rate mode. The transmission rate from a base station in the variable rate mode varies between successive data transmit intervals, and the transmission rate from a base station in the fixed rate mode remains fixed between successive data transmit intervals. Data is transmitted from a first base station to the mobile station in the variable rate mode until the first base station is unable to receive variable data rate control information from the mobile station. When the first base station is unable to receive the variable data rate control information from the mobile station, the mobile station attempts to remain in the variable rate mode by searching for a second base station that will support data transmissions to the mobile station in the variable rate mode and, if the mobile station is able to locate the second base station that will support data transmissions to the mobile station in the variable rate mode, then the second base station transmits data to the mobile station in the variable rate mode and transmissions from the first base station to the mobile station in the variable rate mode terminate. If the mobile station is unable to locate the second base station that will support data transmissions to the mobile station in the variable rate mode, data is transmitted to the mobile station from either the first base station or a different base station in the fixed rate mode.
摘要翻译： 一种用于在移动无线电通信系统中控制与从基站到移动台的信息传输相关联的数据速率的方法和装置。 移动台以可变速率模式或固定速率模式从基站交替地接收信息。 来自基站的可变速率模式的传输速率在连续的数据发送间隔之间变化，并且来自固定速率模式的基站的传输速率在连续的数据发送间隔之间保持固定。 数据以可变速率模式从第一基站发送到移动台，直到第一基站不能从移动台接收可变数据速率控制信息。 当第一基站不能从移动台接收可变数据速率控制信息时，移动台试图通过搜索将在该变量中支持对移动站的数据传输的第二基站来保持可变速率模式 并且如果移动台能够将能够以可变速率模式支持到移动站的数据传输的第二基站定位，则第二基站以可变速率模式向移动台发送数据，并且从 以可变速率模式移动台的第一个基站终止。 如果移动台不能将可支持以可变速率模式向移动台发送数据的第二基站定位，则以固定速率模式从第一基站或不同基站发送数据到移动台 。
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9.发明授权Method and apparatus for dynamic adjustment of rise-over-thermal (ROT) threshold for reverse link rate allocation 失效用于反向链路速率分配的上升热（ROT）阈值的动态调整的方法和装置公开(公告)号：US07525909B2
公开(公告)日：2009-04-28
申请号：US10600231
申请日：2003-06-19
摘要： A method and an apparatus of dynamically setting a rise-over-thermal (ROT) threshold to control user-to-user interferences in a wireless communication system are disclosed. The ROT threshold is set by determining whether an outage of communication has occurred, increasing the ROT threshold by a predetermined increment if the outage has not occurred, and decreasing the ROT threshold by a predetermined decrement if the outage has occurred.
摘要翻译： 公开了一种在无线通信系统中动态设置上变热（ROT）阈值以控制用户与用户干扰的方法和装置。 通过确定是否发生通信中断来设置ROT阈值，如果没有发生中断，则将ROT阈值增加预定增量，并且如果发生中断，则将ROT阈值减小预定的减少量。
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公开(公告)号：US07515580B2
公开(公告)日：2009-04-07
申请号：US10866296
申请日：2004-06-10
IPC分类号： H04J3/24
CPC分类号： H04W52/24 , H04W52/26 , H04W52/267 , H04W52/286 , H04W68/00 , H04W72/1231
摘要： In a data communication system capable of variable rate transmission, the data rate is determined by the largest C/I measurement of the forward link signals as measured at the Access Terminal. In one embodiment, the data transmission is scheduled based on an Access Terminal initiated forward power control, which reduces forward link rate quantization loss due to excess transmit power. The Access Terminal reports to the Access Point the excess C/I estimate for the selected rate. The Access Point then reduces its transmit power by an appropriate amount when serving that Access Terminal. In another embodiment, the data transmission is scheduled based on an Access Point initiated forward power control. The Access Point varies its transmit power over time either randomly or in synchronism with neighboring Access Points in the communication system, which enables an increase in the throughput achieved by users that receive a significant amount of interference.
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