Ben
15th July 2007, 10:10 AM
I didn't know this, but apparently HSDPA on our UMTS networks is going to considerably steal the march over EVDO networks on CDMA2000 and that Telstra in Australia has actually announced that it will retire the EVDO network in favour of a HSDPA one! O_o
http://en.wikipedia.org/wiki/Hsdpa
The first phase of HSDPA has been specified in 3GPP release 5. Phase one introduces new basic functions and is aimed to achieve peak data rates of 14.4 Mbit/s (see above). Newly introduced are the High Speed Downlink Shared Channels (HS-DSCH), the adaptive modulation QPSK and 16QAM and the High Speed Medium Access protocol (MAC-hs) in the Node-B.
The second phase of HSDPA is specified in the upcoming 3GPP release 7 and has been named HSPA Evolved. It can achieve data rates of up to 42 Mbit/s.[1] It will introduce antenna array technologies such as beamforming and Multiple Input Multiple Output (MIMO). Beam forming can be described as focusing the transmitted power of an antenna in a beam towards the users direction. MIMO uses multiple antennas at the sending and receiving side. Deployments are scheduled to begin in the second half of 2008.
After HSDPA the roadmap leads to HSOPA, a technology under development for specification in 3GPP Release 8. This project is called the LTE (Long Term Evolution) initiative. It aims to achieve data rates of up 200 Mbit/s for downlink and 100 Mbit/s for uplink using OFDMA modulation.
Lmao, the bit on beam focusing is hilarious IMHO! Not as hilarious as the top speeds we could be seeing in a few years time - God only knows if we'll ever use them.
http://en.wikipedia.org/wiki/Hsdpa
The first phase of HSDPA has been specified in 3GPP release 5. Phase one introduces new basic functions and is aimed to achieve peak data rates of 14.4 Mbit/s (see above). Newly introduced are the High Speed Downlink Shared Channels (HS-DSCH), the adaptive modulation QPSK and 16QAM and the High Speed Medium Access protocol (MAC-hs) in the Node-B.
The second phase of HSDPA is specified in the upcoming 3GPP release 7 and has been named HSPA Evolved. It can achieve data rates of up to 42 Mbit/s.[1] It will introduce antenna array technologies such as beamforming and Multiple Input Multiple Output (MIMO). Beam forming can be described as focusing the transmitted power of an antenna in a beam towards the users direction. MIMO uses multiple antennas at the sending and receiving side. Deployments are scheduled to begin in the second half of 2008.
After HSDPA the roadmap leads to HSOPA, a technology under development for specification in 3GPP Release 8. This project is called the LTE (Long Term Evolution) initiative. It aims to achieve data rates of up 200 Mbit/s for downlink and 100 Mbit/s for uplink using OFDMA modulation.
Lmao, the bit on beam focusing is hilarious IMHO! Not as hilarious as the top speeds we could be seeing in a few years time - God only knows if we'll ever use them.