公开(公告)号：US20020146024A1

公开(公告)日：2002-10-10

申请号：US09775373

申请日：2001-02-01

Applicant: MOTOROLA, INC.

Inventor： John M. Harris ,  Phil Fleming ,  Nol Rananand

IPC: H04K001/00

CPC classification number: H04W28/22 ,  H04B2201/70703 ,  H04W24/00 ,  H04W28/14

Abstract: An apparatus and method that optimizes the data rate for forward link data transmissions in a spread-spectrum communications system 106 is provided. The spread-spectrum communications system 106 comprises a wireless infrastructure 103, at least one wireless mobile receiving device 105, and an radio frequency (RF) forward link 104 between the wireless infrastructure 103 and the wireless mobile receiving device 105. The data rate of the RF forward link 104 is optimized in the wireless infrastructure 103 by estimating or measuring the bottleneck link speed of the data transmission and adjusting the data rate for the RF forward link 104 according to several embodiments of a data rate optimization algorithm. The algorithm creates an optimum range for the data rate of the RF wireless link 104 which maximizes system capacity and reduces transmission delays to the wireless mobile receiving device 105. When appropriate, the data rate of the RF forward link 104 is decreased to remain within the optimized range, thereby increasing system capacity without impacting the performance perceived by a user at the wireless mobile receiving device 105. Conversely, if necessary, the data rate is increased to remain with the optimized range, thereby reducing transmission delays to the wireless mobile receiving device 105.

Abstract translation: 提供了一种优化扩频通信系统106中的前向链路数据传输的数据速率的装置和方法。 扩频通信系统106包括无线基础设施103，至少一个无线移动接收设备105和无线基础设施103与无线移动接收设备105之间的射频（RF）前向链路104。 根据数据速率优化算法的若干实施例，通过估计或测量数据传输的瓶颈链路速度并调整RF前向链路104的数据速率，在无线基础设施103中优化RF前向链路104。 该算法为RF无线链路104的数据速率创建最佳范围，其使系统容量最大化并减少到无线移动接收设备105的传输延迟。当适当时，RF前向链路104的数据速率降低以保持在 优化的范围，从而增加系统容量，而不影响用户在无线移动接收设备105处感知到的性能。相反，如果需要，数据速率被增加以保持优化的范围，从而减少到无线移动接收设备的传输延迟 105。