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 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 13.6.0 Release 13)
TS 129 212 Universal Mobile Telecommunications System (UMTS); LTE; Policy and Charging Control (PCC); Reference points (3GPP TS 29.212 version 13.8.0 Release 13)
TS 129 213 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Policy and charging control signalling flows and Quality of Service (QoS) parameter mapping (3GPP TS 29.213 version 13.8.0 Release 13)
TS 129 214 Universal Mobile Telecommunications System (UMTS); LTE; Policy and charging control over Rx reference point (3GPP TS 29.214 version 13.8.0 Release 13)
TS 129 215 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Policy and Charging Control (PCC) over S9 reference point; Stage 3 (3GPP TS 29.215 version 13.8.0 Release 13)
TS 129 217 Universal Mobile Telecommunications System (UMTS); LTE; Policy and Charging Control (PCC); Congestion reporting over Np reference point (3GPP TS 29.217 version 13.6.0 Release 13)
TS 129 219 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Policy and charging control: Spending limit reporting over Sy reference point (3GPP TS 29.219 version 13.4.0 Release 13)
TS 129 229 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Cx and Dx interfaces based on the Diameter protocol; Protocol details (3GPP TS 29.229 version 13.1.0 Release 13)
TS 129 230 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Diameter applications; 3GPP specific codes and identifiers (3GPP TS 29.230 version 13.7.0 Release 13)
TS 129 232 Digital cellular telecommunications system (Phase 2+) (GSM); Universal Mobile Telecommunications System (UMTS); LTE; Media Gateway Controller (MGC) - Media Gateway (MGW) interface; Stage 3 (3GPP TS 29.232 version 13.2.0 Release 13)
TS 129 272 Universal Mobile Telecommunications System (UMTS); LTE; Evolved Packet System (EPS); Mobility Management Entity (MME) and Serving GPRS Support Node (SGSN) related interfaces based on Diameter protocol (3GPP TS 29.272 version 13.8.0 Release 13)
TS 129 273 Universal Mobile Telecommunications System (UMTS); LTE; Evolved Packet System (EPS); 3GPP EPS AAA interfaces (3GPP TS 29.273 version 13.6.0 Release 13)
TS 129 274 Universal Mobile Telecommunications System (UMTS); LTE; 3GPP Evolved Packet System (EPS); Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C); Stage 3 (3GPP TS 29.274 version 13.8.0 Release 13)
TR 126 922 Universal Mobile Telecommunications System (UMTS); LTE; Video telephony robustness improvements extensions; Performance evaluation (3GPP TR 26.922 version 13.0.1 Release 13)
TR 126 924 Universal Mobile Telecommunications System (UMTS); LTE; Multimedia telephony over IP Multimedia Subsystem (IMS); Study on improved end-to-end Quality of Service (QoS) handling for Multimedia Telephony Service for IMS (MTSI) (3GPP TR 26.924 version 13.0.1 Release 13)
TS 126 234 Universal Mobile Telecommunications System (UMTS); LTE; Transparent end-to-end Packet-switched Streaming Service (PSS); Protocols and codecs (3GPP TS 26.234 version 13.2.1 Release 13)
TS 128 622 Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Generic Network Resource Model (NRM) Integration Reference Point (IRP); Information Service (IS) (3GPP TS 28.622 version 11.3.0 Release 11)
TS 128 622 Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Generic Network Resource Model (NRM) Integration Reference Point (IRP); Information Service (IS) (3GPP TS 28.622 version 12.2.0 Release 12)
TS 128 622 Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Generic Network Resource Model (NRM) Integration Reference Point (IRP); Information Service (IS) (3GPP TS 28.622 version 13.1.0 Release 13)
TS 128 732 Universal Mobile Telecommunications System (UMTS); LTE; Telecommunication management; Transport Network (TN) interface Network Resource Model (NRM) Integration Reference Point (IRP); Information Service (IS) (3GPP TS 28.732 version 13.1.0 Release 13)