Motivation for 3GPP Release 8 - The LTE Release
- Need to ensure the continuity of competitiveness of the 3G system for the future
- User demand for higher data rates and quality of service
- Packet Switch optimised system
- Continued demand for cost reduction (CAPEX and OPEX)
- Low complexity
- Avoid unnecessary fragmentation of technologies for paired and unpaired band operation
LTE Release 8 Key Features
- High spectral efficiency
— OFDM in Downlink, Robust against multipath interference & High affinity to advanced techniques such as Frequency domain channel-dependent scheduling & MIMO
— DFTS-OFDM(“Single-Carrier FDMA”) in Uplink, Low PAPR, User orthogonality in frequency domain
— Multi-antenna application - Very low latency
— Short setup time & Short transfer delay
— Short HO latency and interruption time; Short TTI, RRC procedure, Simple RRC states - Support of variable bandwidth
— 1.4, 3, 5, 10, 15 and 20 MHz - Simple protocol architecture
— Shared channel based
— PS mode only with VoIP capability - Simple Architecture
— eNodeB as the only E-UTRAN node
— Smaller number of RAN interfaces, eNodeB « MME/SAE-Gateway (S1), eNodeB « eNodeB (X2) - Compatibility and inter-working with earlier 3GPP Releases
- Inter-working with other systems, e.g. cdma2000
- FDD and TDD within a single radio access technology
- Efficient Multicast/Broadcast
— Single frequency network by OFDM - Support of Self-Organising Network (SON) operation
LTE Release 8 Major Parameters
LTE-Release 8 User Equipment Categories
LTE Historical Information
Initiated in 2004, the Long Term Evolution (LTE) project focused on enhancing the Universal Terrestrial Radio Access (UTRA) and optimizing 3GPP’s radio access architecture.
Targets were to have average user throughput of three- to four-times the Release 6 HSDPA levels in the Downlink (100Mbps), and two to three times the HSUPA levels in the Uplink (50Mbps).