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 132 155 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Requirements template (3GPP TS 32.155 version 13.1.1 Release 13)
TS 132 260 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; IP Multimedia Subsystem (IMS) charging (3GPP TS 32.260 version 10.16.0 Release 10)
TS 132 260 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; IP Multimedia Subsystem (IMS) charging (3GPP TS 32.260 version 11.18.0 Release 11)
TS 132 260 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; IP Multimedia Subsystem (IMS) charging (3GPP TS 32.260 version 12.11.0 Release 12)
TS 132 260 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; IP Multimedia Subsystem (IMS) charging (3GPP TS 32.260 version 13.7.0 Release 13)
TS 132 260 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; IP Multimedia Subsystem (IMS) charging (3GPP TS 32.260 version 9.20.0 Release 9)
TS 132 273 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; Multimedia Broadcast and Multicast Service (MBMS) charging (3GPP TS 32.273 version 13.2.1 Release 13)
TS 132 298 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; Charging Data Record (CDR) parameter description (3GPP TS 32.298 version 10.20.0 Release 10)
TS 132 298 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; Charging Data Record (CDR) parameter description (3GPP TS 32.298 version 11.17.0 Release 11)
TS 132 298 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; Charging Data Record (CDR) parameter description (3GPP TS 32.298 version 12.12.0 Release 12)
TS 132 298 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; Charging Data Record (CDR) parameter description (3GPP TS 32.298 version 13.6.0 Release 13)
TS 132 298 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Charging management; Charging Data Record (CDR) parameter description (3GPP TS 32.298 version 9.23.0 Release 9)
TS 129 283 LTE; Universal Mobile Telecommunications System (UMTS); Diameter data management applications (3GPP TS 29.283 version 13.2.0 Release 13)
TS 129 303 Universal Mobile Telecommunications System (UMTS); LTE; Domain Name System Procedures; Stage 3 (3GPP TS 29.303 version 13.5.0 Release 13)
TS 129 328 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia (IM) Subsystem Sh interface; Signalling flows and message contents (3GPP TS 29.328 version 13.7.0 Release 13)
TS 129 329 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Sh interface based on the Diameter protocol; Protocol details (3GPP TS 29.329 version 13.1.0 Release 13)
TS 129 336 Universal Mobile Telecommunications System (UMTS); LTE; Home Subscriber Server (HSS) diameter interfaces for interworking with packet data networks and applications (3GPP TS 29.336 version 13.6.0 Release 13)
TS 129 337 Universal Mobile Telecommunications System (UMTS); LTE; Diameter-based T4 Interface for communications with packet data networks and applications (3GPP TS 29.337 version 13.2.0 Release 13)
TS 129 338 Universal Mobile Telecommunications System (UMTS); LTE; Diameter based protocols to support Short Message Service (SMS) capable Mobile Management Entities (MMEs) (3GPP TS 29.338 version 13.3.0 Release 13)
TS 129 344 Universal Mobile Telecommunications System (UMTS); LTE; Proximity-services (ProSe) function to Home Subscriber Server (HSS) aspects; Stage 3 (3GPP TS 29.344 version 13.2.0 Release 13)