wimax, lte

http://cdnet.stpi.org.tw/techroom/topics/wimax/twj_wimax.htm

http://en.wikipedia.org/wiki/3GPP_Long_Term_Evolution
3GPP LTE (Long Term Evolution) is the name given to a project within the Third Generation Partnership Project to improve the UMTS mobile phone standard to cope with future technology evolutions. Goals include improving spectral efficiency, lowering costs, improving services, making use of new spectrum and refarmed spectrum opportunities, and better integration with other open standards. The LTE air interface will be added to the specification in Release 8 and can be found in the 36-series [1] of the 3GPP specifications. Although an evolution of UMTS, the LTE air interface is a completely new system based on OFDMA in the downlink and SC-FDMA (DFTS-FDMA) in the uplink that efficiently supports multi-antenna techologies (MIMO). The architecture resulting from this work is called EPS (Evolved Packet System) and comprises E-UTRAN (Evolved UTRAN) on the access side and EPC (Evolved Packet Core) on the core side.