LTE Reference

LTE Over The Air Capability Overview

Peak downlink speed	(Mbps)	64QAM 100 (SISO), 172 (2×2 MIMO), 326 (4×4 MIMO)
Peak uplink speeds	(Mbps)	50 (QPSK), 57 (16QAM), 86 (64QAM)
Data type		All packet switched data (voice and data). No circuit switched.
Channel bandwidths	(MHz)	1.4,   3,   5,   10,   15,   20
Duplex schemes		FDD and TDD
Mobility		0 — 15 km/h (optimised), 15 — 120 km/h (high performance)
Latency		Idle to active less than 100ms Small packets ~10 ms
Access schemes		OFDMA (Downlink)
		SC-FDMA (Uplink)
Modulation types supported		QPSK,   16QAM,   64QAM (Uplink and downlink)

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[line]

• 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 8-10 Major Parameters

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LTE-Release 8-10 User Equipment Categories

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Network Overview Diagram

[download_box]LTE_poster

4G Technology Roadmap [/download_box]

General Information

Roadmap of Networks Evolution to 4G (Slide from QCOM Investor Presentation November 2010)

LTE Traction (Slide from QCOM Investor Presentation November 2010)

Chipsets enable LTE ecosystem.