Universal Mobile Telecommunication System – Long Term Evolution (UMTS‐LTE)
Leonhard Korowajczuk · 2011
The GSM branch decided to change to cdma (code division multiple access) technology for its third generation, using as radio technology WCDMA (Wideband Code Division Multiple Access) and the solution was adopted under the umbrella of UMTS (Universal Mobile Telecommunication System). The new technology was nicknamed LTE (Long Term Evolution) and, to differentiate it from WiMAX, a set of requirements was established to target some of the weak points of the other OFDM technology. 3GPP standards are in a state of constant evolution and this is reflected in the specifications, which are classified by topic into series (numbered from 01 to 99). 3GPP standardized frequency bands in which the technology could be deployed worldwide. Those bands were divided into FDD and TDD. This chapter illustrates the layers of the wireless protocol stack between the UE and eNB. Controlled Vocabulary Terms 3G mobile communication; GSM; long term evolution; Multiaccess communication; WiMAX