Hi, guys according to your prediction, like what the next generation of mobile broadband wireless ?
the proposed IEEE 802.20 contains several criterias such as:
The standard's proposed benefits:
* IP roaming & handoff (at more than 1 Mbit/s)
* New MAC and PHY with IP and adaptive antennas
* Optimized for full mobility up to vehicular speeds of 250 km/h
* Operates in Licensed Bands (below 3.5 GHz)
* Utilizes Packet Architecture
* Low Latency
Some technical details
* Bandwidths of 5, 10, and 20 Mhz.
* Peak data rates of 80 Mbit/s.
* Spectral efficiency above 1 bit/sec/Hz using MIMO.
* Layered frequency hopping allocates OFDM carriers to near, middle, and far-away handsets, improving SNR (works best for SISO handsets.)
* Supports low-bit rates efficiently, carrying up to 100 phone calls per Mhz.
* Hybrid ARQ with up to 6 transmissions and several choices for interleaving.
* Basic slot period of 913 microseconds carrying 8 OFDM symbols.
* One of the first standards to support both TDM (FL,RL) and separate-frequency (FL, RL) deployments.
(quoted from wikipedia)
