HDR (high data rate) is a high rate wireless access technology in CDMA2000 system, it can satisfy the need for higher data rate communications out of the voice channel.

高速数据率是面向CD MA2000所开发的高速无线接入技术，它可以在以传输电话语音为主的通道以外，引进可以满足高速数据通信需求的技术。

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A contention based uplink channel used for transmission of relatively small amounts of data, e. g. for initial access or non-real-time dedicated control or traffic data.

一个用于传输少量数据的争用上行通道，用于传输比如初始接入或非实时的控制或业务数据。

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