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 126 102 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Mandatory speech codec; Adaptive Multi-Rate (AMR) speech codec; Interface to Iu, Uu and Nb (3GPP TS 26.102 version 14.0.0 Release 14)
TS 126 202 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Speech codec speech processing functions; Adaptive Multi-Rate - Wideband (AMR-WB) speech codec; Interface to Iu, Uu and Nb (3GPP TS 26.202 version 14.0.0 Release 14)
TS 126 223 Universal Mobile Telecommunications System (UMTS); LTE; Telepresence using the IP Multimedia Subsystem (IMS); Media handling and interaction (3GPP TS 26.223 version 14.1.0 Release 14)
TS 128 515 LTE; Telecommunication management; Fault Management (FM) for mobile networks that include virtualized network functions; Requirements (3GPP TS 28.515 version 14.0.0 Release 14)
TS 128 516 LTE; Telecommunication management; Fault Management (FM) for mobile networks that include virtualized network functions; Procedures (3GPP TS 28.516 version 14.0.0 Release 14)
TS 128 517 LTE; Telecommunication management; Fault Management (FM) for mobile networks that include virtualized network functions; Stage 2 (3GPP TS 28.517 version 14.0.0 Release 14)
TS 128 525 LTE; Telecommunication management; Life Cycle Management (LCM) for mobile networks that include virtualized network functions; Requirements (3GPP TS 28.525 version 14.0.0 Release 14)
TS 128 526 LTE; Telecommunication management; Life Cycle Management (LCM) for mobile networks that include virtualized network functions; Procedures (3GPP TS 28.526 version 14.0.0 Release 14)
TS 128 527 LTE; Telecommunication management; Life Cycle Management (LCM) for mobile networks that include virtualized network functions; Stage 2 (3GPP TS 28.527 version 14.0.0 Release 14)
TS 128 621 Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Generic Network Resource Model (NRM) Integration Reference Point (IRP); Requirements (3GPP TS 28.621 version 14.0.0 Release 14)
TS 129 201 Universal Mobile Telecommunications System (UMTS); LTE; Representational State Transfer (REST) reference point between Application Function (AF) and Protocol Converter (PC) (3GPP TS 29.201 version 14.0.0 Release 14)
TS 123 008 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Organization of subscriber data (3GPP TS 23.008 version 14.1.0 Release 14)
TS 129 109 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Generic Authentication Architecture (GAA); Zh and Zn Interfaces based on the Diameter protocol; Stage 3 (3GPP TS 29.109 version 14.0.0 Release 14)
TS 129 171 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Location Services (LCS); LCS Application Protocol (LCS-AP) between the Mobile Management Entity (MME) and Evolved Serving Mobile Location Centre (E-SMLC); SLs interface (3GPP TS 29.171 version 14.0.0 Release 14)
TS 124 002 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; GSM - UMTS Public Land Mobile Network (PLMN) Access Reference Configuration (3GPP TS 24.002 version 14.0.0 Release 14)
TS 124 109 Universal Mobile Telecommunications System (UMTS); LTE; Bootstrapping interface (Ub) and network application function interface (Ua); Protocol details (3GPP TS 24.109 version 14.0.0 Release 14)
TS 124 117 LTE; TV service configuration Management Object (MO) (3GPP TS 24.117 version 14.0.0 Release 14)
TS 124 182 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; IP Multimedia Subsystem (IMS) Customized Alerting Tones (CAT); Protocol specification (3GPP TS 24.182 version 14.0.0 Release 14)
TS 124 216 Universal Mobile Telecommunications System (UMTS); LTE; Communication Continuity Management Object (MO) (3GPP TS 24.216 version 14.0.0 Release 14)
TS 124 244 Universal Mobile Telecommunications System (UMTS); LTE; Wireless LAN control plane protocol for trusted WLAN access to EPC; Stage 3 (3GPP TS 24.244 version 14.0.0 Release 14)