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    Method and an apparatus for a quick retransmission of signals in a communication system
    1.
    发明授权
    Method and an apparatus for a quick retransmission of signals in a communication system 有权
    用于在通信系统中快速重传信号的方法和装置

    公开(公告)号：US06694469B1

    公开(公告)日：2004-02-17

    申请号：US09549017

    申请日：2000-04-14

    申请人： Ahmad Jalali ,  Eduardo A. S. Esteves ,  Nagabhushana T. Sindhushayana ,  Peter J. Black ,  Rashid A. Attar

    发明人： Ahmad Jalali ,  Eduardo A. S. Esteves ,  Nagabhushana T. Sindhushayana ,  Peter J. Black ,  Rashid A. Attar

    IPC分类号： G08C2502

    CPC分类号： H04L1/1887 ,  H04L1/1692 ,  H04L1/1809 ,  H04L1/1848 ,  H04L1/1877 ,  H04L1/188

    摘要： A method and an apparatus for quick retransmission of signals in a communication system are disclosed. A transmitting terminal, e.g., a base station, transmits signals in a form of packets to a receiving terminal, e.g., a subscriber station. The receiving terminal determines if the packet was intended for the receiving terminal, and if so, the receiving terminal demodulates the packet. The receiving terminal then computes a quality metric of the packet, e.g., a cyclic redundancy check, and compares the computed quality metric with a quality metric contained in the packet. If the quality metrics match, the packet is declared correctly received, and is forwarded for further processing. If the quality metrics fail to match, the receiving terminal sends a request for retransmission of the packet. The transmitting terminal determines which packet needs to be retransmitted based on the request for retransmission. The transmitting terminal then schedules the packet for retransmission. If delivery of the packet in accordance with the aforementioned description fails, retransmission in accordance with conventional sequence-number-based schemes, e.g., radio link protocol, is attempted.

    摘要翻译： 公开了一种在通信系统中快速重发信号的方法和装置。 发送终端（例如基站）以分组的形式向接收终端（例如，用户台）发送信号。 接收终端确定分组是否用于接收终端，如果是，则接收终端解调分组。 接收终端然后计算分组的质量度量，例如循环冗余校验，并将计算的质量度量与分组中包含的质量度量进行比较。 如果质量度量匹配，则报文被正确地接收，并被转发用于进一步的处理。 如果质量度量不匹配，则接收终端发送分组请求。 发送终端根据重传请求确定哪个分组需要重传。 然后，发送终端调度分组进行重传。 如果根据上述描述的分组的传送失败，则尝试根据常规的基于序列号的方案，例如无线电链路协议进行重传。

    Method and an apparatus for a quick retransmission of signals in a communication system
    6.
    发明授权
    Method and an apparatus for a quick retransmission of signals in a communication system 有权
    用于在通信系统中快速重传信号的方法和装置

    公开(公告)号：US07613978B2

    公开(公告)日：2009-11-03

    申请号：US11518329

    申请日：2006-09-07

    申请人： Ahmad Jalali ,  Eduardo A.S. Esteves ,  Nagabhushana T. Sindhushayana ,  Peter J. Black ,  Rashid A. Attar

    发明人： Ahmad Jalali ,  Eduardo A.S. Esteves ,  Nagabhushana T. Sindhushayana ,  Peter J. Black ,  Rashid A. Attar

    IPC分类号： G08C25/02 ,  G06F11/00

    CPC分类号： H04L1/1887 ,  H04L1/1692 ,  H04L1/1809 ,  H04L1/1848 ,  H04L1/1877 ,  H04L1/188

    摘要： A method and an apparatus for quick retransmission of signals in a communication system are disclosed. A transmitting terminal, e.g., a base station, transmits signals in a form of packets to a receiving terminal, e.g., a subscriber station. The receiving terminal determines if the packet was intended for the receiving terminal, and if so, the receiving terminal demodulates the packet. The receiving terminal then computes a quality metric of the packet, and compares the computed quality metric with a quality metric contained in the packet. If the quality metrics match, the packet is declared correctly received, and is forwarded for further processing. If the quality metrics fail to match, the receiving terminal sends a request for retransmission of the packet. The transmitting terminal determines which packet needs to be retransmitted based on the request for retransmission. The transmitting terminal then schedules the packet for retransmission.

    摘要翻译： 公开了一种在通信系统中快速重发信号的方法和装置。 发送终端（例如基站）以分组的形式向接收终端（例如，用户台）发送信号。 接收终端确定分组是否用于接收终端，如果是，则接收终端解调分组。 接收终端然后计算分组的质量度量，并将计算的质量度量与分组中包含的质量度量进行比较。 如果质量度量匹配，则报文被正确地接收，并被转发用于进一步的处理。 如果质量度量不匹配，则接收终端发送分组请求。 发送终端根据重传请求确定哪个分组需要重传。 然后，发送终端调度分组进行重传。

    Method and apparatus for a rate control in a high data rate communication system
    7.
    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

    申请人： Nagabhushana T. Sindhushayana ,  Rashid A. Attar ,  Eduardo A. S. Esteves

    发明人： Nagabhushana T. Sindhushayana ,  Rashid A. Attar ,  Eduardo A. S. Esteves

    IPC分类号： H04L12/26 ,  H04B7/212

    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。

    Method and apparatus for adaptive rate selection in a communication system
    8.
    发明授权
    Method and apparatus for adaptive rate selection in a communication system 失效
    通信系统中自适应速率选择的方法和装置

    公开(公告)号：US07440431B2

    公开(公告)日：2008-10-21

    申请号：US10834605

    申请日：2004-04-28

    申请人： Nagabhushana T. Sindhushayana ,  Eduardo A. S. Esteves ,  Rashid A. Attar ,  Qiang Wu

    发明人： Nagabhushana T. Sindhushayana ,  Eduardo A. S. Esteves ,  Rashid A. Attar ,  Qiang Wu

    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。

    Method and apparatus for a rate control in a high data rate communication system
    10.
    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

    申请人： Nagabhushana T. Sindhushayana ,  Rashid A. Attar ,  Eduardo A. S. Esteves

    发明人： Nagabhushana T. Sindhushayana ,  Rashid A. Attar ,  Eduardo A. S. Esteves

    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。