high speed packet access plus (UMTS) (HSPA+)
High Speed Packet Access Plus(HSPA+) is a more powerful variant of High Speed Packet Access (HSPA) that has been standardized by the Third Generation Partnership Project( 3GPP). Unlike HSPA, which offers data rates of up to 10 Mbit/s in the downlink( DL) as High Speed Downlink Packet Access ( HSDPA), the downlink of HSPA+ brings it to data rates of 28 Mbit/s, 42 Mbit/s and 84 Mbit/s and the uplink to 11 Mbit/s and 23 Mbit/s, respectively, instead of 1.5 Mbit/s for HSUPA.
The higher data rates of HSPA+ have the effect of shortening ping times and are ideal for all data-intensive mobile applications.
HSPA+ creates a continuous transition from the 3rd.5th generation mobile networks to those of the 4th generation with Long Term Evolution( LTE). HSPA+, which like HSPA uses the UMTS infrastructure, operates with carrier aggregation, a multi- antenna system based on the MIMO method, and uses quadrature amplitude modulation as coding, as 64QAM in the downlink and 16QAM in the uplink. In addition, the MIMO method and spatial multiplexing are used in the downlinkk to increase the data rate.