公开(公告)号：US20030123406A1

公开(公告)日：2003-07-03

申请号：US10034086

申请日：2001-12-28

Applicant: NORTEL NETWORKS LIMITED

Inventor： Mehmet Yavuz ,  David Paranchych ,  Geng Wu

IPC: H04Q007/00

CPC classification number: H04W72/085 ,  H04W52/0245 ,  Y02D70/122 ,  Y02D70/1244

Abstract: A method and system applicable within a mobile transmission system for adaptively allocating a downlink data rate to an access terminal to compensate for channel fading. In accordance with the method of the present invention a downlink data rate selected in accordance with a determined signal-to-noise level, wherein the downlink data rate is associated with a specified signal-to-noise threshold to achieve a specified packet error rate. Next, a packet is transmitted to an access terminal at the selected downlink data rate. In response to successfully decoding the packet at the access terminal, the signal-to-noise threshold specified for the selected downlink data rate is decreased such that subsequent data rate selections are adaptively maximized. Responsive to a packet decoding error, the signal-to-noise threshold is abruptly increased to maintain the specified packet error rate.

Abstract translation: 一种适用于移动传输系统的方法和系统，用于将下行链路数据速率自适应地分配给接入终端以补偿信道衰落。 根据本发明的方法，根据确定的信噪比级别选择下行链路数据速率，其中下行链路数据速率与指定的信噪比阈值相关联以实现指定的分组错误率。 接下来，以所选择的下行链路数据速率将分组发送到接入终端。 响应于在接入终端成功解码分组，减小为所选择的下行链路数据速率指定的信噪比阈值，使得随后的数据速率选择被自适应地最大化。 响应于分组解码错误，信号噪声阈值突然增加以维持指定的分组错误率。

公开(公告)号：US20040001462A1

公开(公告)日：2004-01-01

申请号：US10186787

申请日：2002-07-01

Applicant: Nortel Networks Limited

Inventor： Mehmet Yavuz ,  David Paranchych

IPC: H04Q007/00 ,  H04Q007/28

CPC classification number: H04W28/22 ,  H04L1/0002 ,  H04L1/0021 ,  H04L1/0025

Abstract: A method and system applicable within a mobile transmission system for adaptively allocating a downlink data rate to an access terminal to compensate for channel fading. In accordance with the method of the present invention a downlink data rate is selected in accordance with a determined signal-to-noise level and an effective throughput, wherein the downlink data rate is associated with a specified signal-to-noise threshold to achieve a specified packet error rate. Next, a packet is transmitted to an access terminal at the selected downlink data rate. In response to successfully decoding the packet at the access terminal, the signal-to-noise threshold specified for the selected downlink data rate is decreased such that subsequent data rate selections are adaptively maximized. Responsive to a packet decoding error, the signal-to-noise threshold is abruptly increased to maintain the specified packet error rate.

Abstract translation: 一种适用于移动传输系统的方法和系统，用于将下行链路数据速率自适应地分配给接入终端以补偿信道衰落。 根据本发明的方法，根据确定的信噪比水平和有效吞吐量来选择下行链路数据速率，其中下行链路数据速率与指定的信噪比阈值相关联以实现 指定包错误率。 接下来，以所选择的下行链路数据速率将分组发送到接入终端。 响应于在接入终端成功解码分组，减小为所选择的下行链路数据速率指定的信噪比阈值，使得随后的数据速率选择被自适应地最大化。 响应于分组解码错误，信号噪声阈值突然增加以维持指定的分组错误率。