Mobilt bredbånd med LTE : teknologi, sikkerhet, tjenester og utbygging

Long Term Evolution (LTE) is a new standard for mobile telephone systems developed by the 3rd Generation Partnership Project (3GPP). 3GPP is a voluntary organization of operators and industry from around the world. LTE is a wireless radio access technology for broadband connections with theoretical broadband speeds of 100 and 50 Mbit/s, respectively downlink and uplink, and with round-trip delay of less than 10 ms. Evolved Packet Core (EPC) is an IP-based fixed network that interconnects LTE base stations. LTE is the successor of UMTS which follows the GSM/EDGE. There is considerable focus on LTE today in Europe, North America and Asia. The focus on LTE is because the standard will make it cheaper per megabyte for mobile operators (reusing existing IP networks) to produce mobile broadband; in addition it will deliver lower delay and higher bandwidths to customers. Another main reason to choose LTE is its seamless mobility with GSM/EDGE and UMTS. Netcom and Telia were the first operators in the world to put into operation a LTE network in 2009. 17 commercial LTE networks have been in operation since 2010. 180 operators in 70 countries are investing in LTE, of which commitments for development of 128 LTE networks in 52 countries has been made. LTE is a pure IP packet-based “Orthogonal Frequency Division Multiple Access” (OFDMA) broadband system, with higher data speeds, improved spectral efficiency and reduced delay as the most important properties. The report describes the new technology and challenges on the radio access, where the emphasis is on “Orthogonal Frequency Division Multiplexing” (OFDM) and “Multiple Input Multiple Output” (MIMO). Both techniques contribute to the high spectrum utilization. In addition the report describes the packet-based IP core network EPC and protocol structure of the LTE/EPC. The report has focus on the radio access and security. Finally it looks into services, construction and development of LTE and a short introduction of the development of LTE-Advanced, the LTE successor.