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

LTE-Release 8-10 User Equipment Categories

Network Overview Diagram


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.


The Network Mona Lisa

Ericsson: eHRPD EVDO & LTE Interworking

What is coming next after LTE and IMT-Advanced

Interference Coordination and Cancellation for 4G Networks

View more documents from All About 4G

Diameter Learning Center

Agilent LTE Book

The Interoperability Page

Next Generation Mobile Network Group

LTE-Advanced – Evolving LTE towards IMT-Advanced Ericsson


Alcatel Lucent LTE Page

Cisco LTE EPC Page


Ericsson LTE Page

Motorola LTE Page

Nokia-Siemens LTE Page

Nortel LTE Page


Qualcomm LTE


Traffix Systems


Verizon LTE Innovation Center

Key LTE Specifications

3GPP Home

[ Release 8 ]

TS 36.101, E-UTRA: UE radio transmission and reception

TS 36.104, E-UTRA: BS radio transmission and reception

TS 36.201, E-UTRA: LTE Physical Layer — General Description

TS 36.211, E-UTRA: Physical channels and modulation

TS 36.212, E-UTRA: Multiplexing and channel coding

TS 36.213, E-UTRA: Physical layer procedures

TS 36.214, E-UTRA: Physical layer – Measurements

TS 36.300, E-UTRA and E-UTRAN: Overall description; Stage 2

TS 36.302, E-UTRA: Services provided by the physical layer

TS 36.306, E-UTRA: UE Radio Access Capabilities

TS 35.321, E-UTRA: Medium Access Control (MAC) protocol specification

TS 36.323, E-UTRA: Packet Data Convergence Protocol (PDCP) specification

TS 36.331, E-UTRA: Radio Resource Control (RRC); Protocol specification

TS 36.401, E-UTRAN: Architecture description

TR 36.938, E-UTRAN: Improved network controlled mobility between LTE and 3GPP2/mobile WiMAX radio technologies

TR 36.956, E-UTRA; Repeater planning guidelines and system analysis