Long Term Evolution

Introduction

The 3GPP™ radio interface, UTRA (Universal Terrestrial Radio Access), with the enhancements provided by High Speed Packet Access (HSPA), for both downlink and uplink, will remain highly competitive for several years. Nevertheless, the industry that has developed the 3GPP™ technologies is anxious to ensure the continued competitiveness of those technologies and has launched a Long Term Evolution project within 3GPP.

The focus of the LTE project is on:

  • enhancement of the Universal Terrestrial Radio Access (UTRA)
  • optimization of the UTRAN architecture.

A parallel activity is taking place on the evolution of the 3GPP™ System Architecture (SAE).

A more complete summary of the LTE and SAE programmes can be found on the 3GPP™ website.

Our Role & Activities

Long Term Evolution (LTE) of the 3GPP radio technology

The basic criteria for the work on LTE were:

  • Demand for higher data rates
  • Expectations of additional 3G spectrum allocations
  • Greater flexibility in frequency allocations
  • Continued cost reduction
  • Keeping up with other technologies.

More specifically:

  • Significantly increased peak data rates
  • Increased bitrates at the edge of cells
  • Improved spectrum efficiency
  • Improved latency
  • Scaleable bandwidth
  • Reduced capital and operational expenditure
  • Acceptable system and terminal complexity, cost and power consumption
  • Compatibility with earlier releases and with other systems
  • Optimized for low mobile speed but supporting high mobile speed (up to 500 km/h).

ETSI TR 125 913 collects together all the agreed requirements for the Evolved UTRA & UTRAN.

In response to these requirements, various radio technologies were considered but the conclusion was that the downlink would use Orthogonal Frequency Division Multiplexing (OFDM) and the uplink would use Single Carrier - Frequency Division Multiple Access (SC-FDMA). Supported downlink data-modulation schemes are QPSK, 16QAM, and 64QAM, whilst the possible uplink data-modulation schemes are BPSK, QPSK, 8PSK and 16QAM.

3GPP™ Technical Report TR 25.814 defines the physical layer aspects of Evolved UTRA.

System Architecture Evolution (SAE)

The objectives of the complementary SAE study were:

  • 'to develop a framework for an evolution or migration of the 3GPP™ system to a higher-data-rate, lower-latency, packet-optimized system that supports multiple Radio Access Technologies.
  • The focus of this work is on the PS domain with the assumption that voice services are supported in this domain'.

The particular focus has been on:

  • enhancement of Packet Switched technology to cope with rapid growth in IP traffic, i.e.

    • higher data rates
    • lower latency
    • packet-optimized system
  • through
    • fully IP network
    • simplified network architecture
    • distributed control.

The possible use of various access technologies (wireless and wired) has been assumed - not just Enhanced UTRA.

The report of the SAE study can be found in 3GPP™ Technical Report TR 23.882.

Standards

The following is a list of the 20 latest published ETSI standards on long term evolution.

A full list of related standards in the public domain is accessible via the ETSI standards search. Via this interface you can also subscribe for alerts on updates of ETSI standards.

For work in progress see the ETSI Work Programme on the Portal.

Standard No. Standard title.
TS 131 124 Universal Mobile Telecommunications System (UMTS); LTE; Mobile Equipment (ME) conformance test specification; Universal Subscriber Identity Module Application Toolkit (USAT) conformance test specification (3GPP TS 31.124 version 14.0.1 Release 14)
TR 138 900 LTE; 5G; Study on channel model for frequency spectrum above 6 GHz (3GPP TR 38.900 version 14.2.0 Release 14)
TS 136 423 LTE; Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 Application Protocol (X2AP) (3GPP TS 36.423 version 14.1.0 Release 14)
TS 137 144 Universal Mobile Telecommunications System (UMTS); LTE; Digital cellular telecommunications system (Phase 2+) (GSM); User Equipment (UE) and Mobile Station (MS) GSM, UTRA and E-UTRA over the air performance requirements (3GPP TS 37.144 version 14.2.0 Release 14)
TR 131 970 Universal Mobile Telecommunications System (UMTS); LTE UICC power optimisation for Machine-Type Communication (3GPP TR 31.970 version 14.0.0 Release 14)
TS 136 321 LTE; Evolved Universal Terrestrial Radio Access (E-UTRA); Medium Access Control (MAC) protocol specification (3GPP TS 36.321 version 14.2.1 Release 14)
TS 136 361 LTE; Evolved Universal Terrestrial Radio Access (E-UTRA); LTE/WLAN Radio Level Integration Using IPsec Tunnel (LWIP) encapsulation; Protocol specification (3GPP TS 36.361 version 14.0.0 Release 14)
TS 136 124 LTE; Evolved Universal Terrestrial Radio Access (E-UTRA); Electromagnetic compatibility (EMC) requirements for mobile terminals and ancillary equipment (3GPP TS 36.124 version 14.1.0 Release 14)
TS 137 113 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; E-UTRA, UTRA and GSM/EDGE; Multi-Standard Radio (MSR) Base Station (BS) Electromagnetic Compatibility (EMC) (3GPP TS 37.113 version 14.1.0 Release 14)
TS 133 116 Universal Mobile Telecommunications System (UMTS); LTE; Security Assurance Specification (SCAS) for the MME network product class (3GPP TS 33.116 version 14.0.0 Release 14)
TS 133 117 Universal Mobile Telecommunications System (UMTS); LTE; Catalogue of general security assurance requirements (3GPP TS 33.117 version 14.1.0 Release 14)
TS 133 210 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; 3G security; Network Domain Security (NDS); IP network layer security (3GPP TS 33.210 version 14.0.0 Release 14)
TS 133 220 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Generic Authentication Architecture (GAA); Generic Bootstrapping Architecture (GBA) (3GPP TS 33.220 version 14.0.0 Release 14)
TS 133 221 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Generic Authentication Architecture (GAA); Support for subscriber certificates (3GPP TS 33.221 version 14.0.0 Release 14)
TS 133 246 Universal Mobile Telecommunications System (UMTS); LTE; 3G Security; Security of Multimedia Broadcast/Multicast Service (MBMS) (3GPP TS 33.246 version 14.0.0 Release 14)
TS 133 310 Universal Mobile Telecommunications System (UMTS); LTE; Network Domain Security (NDS); Authentication Framework (AF) (3GPP TS 33.310 version 14.0.0 Release 14)
TS 133 320 Universal Mobile Telecommunications System (UMTS); LTE; Security of Home Node B (HNB) / Home evolved Node B (HeNB) (3GPP TS 33.320 version 14.0.0 Release 14)
TS 132 103 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Integration Reference Point (IRP) overview and usage guide (3GPP TS 32.103 version 14.0.0 Release 14)
TS 132 130 Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Network sharing; Concepts and requirements (3GPP TS 32.130 version 14.0.0 Release 14)
TS 132 281 Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; Announcement service (3GPP TS 32.281 version 14.0.0 Release 14)