In addition to the air interface techniques used in CDMA2000 1X and 1xEV-DO Release 0, the following new high-speed packet-switched uplink techniques are incorporated into CDMA2000 1xEV-DO Revision A:

• Fast Uplink Rate Control: to efficiently control the transmission of mobile devices
• Fast Hybrid ARQ in Uplink: to acknowledge correct receipt of data and retransmit erroneous data
• Incremental Redundancy Feedback in Uplink: to increase the effective data rate in the downlink by terminating the transmission of a packet early if it is decoded earlier than expected
• Uplink Channelization: to enable better control of the uplink data flows
• Short Transmission Time Interval (TTI): to accelerate the transmission of packets