Explain High Speed Packet Access?

Explaination: - HSPA is a combination of 2 mobile telephony protocols – High Speed Downlink Packet Access and High Speed Uplink Packet Access - HSPA improves the performance of existing WCDMA protocols. - HSPA provide increased performance by utilizing schemes of modulation and refining the protocols, through which the base stations and handsets communicate - HSPA is used for better usage of the available bandwidth provided by WCDMA - HSPA supports data rates of up to 14 MBit / s in the downlink - HSPA supports data rates of up to 5.8 MBit / s in the uplink - HSPA reduces the latency and increases up to 5 times more system capacity during downlink and twice more system capacity during uplink - HSPA uses 16QAM for yielding higher bit rates - HSPA rollouts are achieved by implementing software upgrades to existing 3G networks. This gives HSPA a head start over WiMax.