Aiming at the lower transmission rate of EV-DO(Releas 0) reversed link,EV-DO(Release A) improved reversed link,increased the peak rate from 153.6 kbps to 1.843 2Mbps.

• 针对EV-DO(Release 0)反向链路传输速率较低；EV-DO(Release A)对反向链路进行了改进；峰值速率从原来的153.；6kbps提高到1