高速分组接入（英语：High Speed Packet Access，缩写：HSPA），是W-CDMA第一个进化技术，HSPA可增加数据传输速率（1－3Mbps），可减少延迟。HSPA 由HSDPA、HSUPA组成，随后还有HSPA+的推出。HSPA+在3GPP release 7中定义。

HSDPA在W-CDMA下行链路中提供封分组数据业务，在一个5MHz载波上的传输速率可达14.4Mbit/s（如采用MIMO技术，则可达28.8 Mbit/s）。

高速上行分组接入（High Speed Uplink Packet Access的缩写HSUPA）是一种因 W-CDMA上传速度不足（只有384Kbit/s）而开发的，亦称为3.75G，可在一个5MHz载波上的下行传输速率可达14.4Mbit/s（如采用MIMO技术，则可达28.8Mbit/s），上行传输速率可达5.76Mbit/s。

High Speed Packet Access (HSPA) is an amalgamation of two mobile protocols, High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access (HSUPA), that extends and improves the performance of existing 3G mobile telecommunication networks utilizing the WCDMA protocols. A further improved 3GPP standard, Evolved High Speed Packet Access (also known as HSPA+), was released late in 2008 with subsequent worldwide adoption beginning in 2010. The newer standard allows bit-rates to reach as high as 337 Mbit/s in the downlink and 34 Mbit/s in the uplink. However, these speeds are rarely achieved in practice.