What is HSDPA and HSUPA?

[bluesqare]

HSPA (High Speed Packet Access), commonly referred to as 3.5G, is an upgrade to WCDMA networks that allows for much higher data speeds for internet connectivity. There are two aspects to this technology and each is more or less independent of the other. HSDPA (High Speed Downlink Packet Access) is the one that improves the downlink of the data transmission while HSUPA (High Speed Uplink Packet Access) is the one that improves the uplink or transmission from the mobile device to the network.

1. HSDPA is the side of the technology that brings information down to the user while HSUPA is the side of the technology that brings information up from the user
2. HSDPA affects downloading and browsing while HSUPA affects uploading files and sending emails
3. HSDPA is often deployed way ahead of HSUPA
4. HSDPA has much faster speeds compared to HSUPA