High speed packet access
High Speed Packet Access ( HSPA ) is an extension of the UMTS cellular standard that enables higher data transmission rates . It is divided into HSDPA for increasing the data transmission rate of the downlink and HSUPA for the uplink .
The backwards-compatible standard HSPA + was introduced around 2011 , which enables improvements through a series of extensions. It has been part of the 3GPP specifications since Release 7. According to HSPA + Release 10 , downstream speeds of up to 168 Mbit / s are planned. HSPA + speeds of up to 42 Mbit / s are currently available in some German, Austrian and Swiss mobile phone networks (as of October 2015). The aim was to improve performance, ie spectral efficiency , maximum data transmission rates and delay times.
features
The main features of HSPA + in 3GPP Release 7 are:
- Multiple input multiple output (MIMO) in the downlink
- higher command modulation for the uplink (16 QAM ) and downlink (64QAM)
- improved Layer 2 support for higher downlink rates
- improved CELL_FACH status (downlink), continuous packet connectivity (CPC)
- Enhanced Fractional DPCH (F-DPCH)
The main features of HSPA + in 3GPP Release 8 are:
- the combination of MIMO and 64QAM
- CS over HSPA
- Dual Cell HSDPA
- improved Layer 2 support for higher uplink rates
- improved CELL_FACH status for the uplink
Web links
- White Paper "Technology of High Speed Packet Access" , Nomor Research
- White paper "HSPA + Technology Introduction" (PDF; 2.7 MB), Rohde & Schwarz
- HSPA specification
Individual evidence
- ↑ http://www.3gpp.org/HSPA
- ↑ HSPA + / HSPA Evolution , Electronics Compendium