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TR 25.814
Physical layer aspect for
evolved Universal Terrestrial Radio Access (UTRA)

V7.1.0 (Wzip)  2006/10  132 p.
Dr. Abeta, Sadayuki

full Table of Contents for  TR 25.814  Word version:  7.1.0

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1  ScopeWord‑p. 9

This document is related to the technical report for physical layer aspect of the study item "Evolved UTRA and UTRAN" [1]. The purpose of this TR is to help TSG RAN WG1 to define and describe the potential physical layer evolution under consideration and compare the benefits of each evolution techniques, along with the complexity evaluation of each technique.
This activity involves the Radio Access work area of the 3GPP studies and has impacts both on the Mobile Equipment and Access Network of the 3GPP systems.
This document is intended to gather all information in order to compare the solutions and gains vs. complexity, and draw a conclusion on way forward.
Six basic L1 concept proposals are evaluated in this TR:
  1. FDD UL based on SC-FDMA, FDD DL based on OFDMA
  2. FDD UL based on OFDMA, FDD DL based on OFDMA
  3. FDD UL/DL based on MC-WCDMA
  4. TDD UL/DL based on MC-TD-SCDMA
  5. TDD UL/DL based on OFDMA
  6. TDD UL based on SC-FDMA, TDD DL based on OFDMA

1.1  Rationale for RAN#30 decision on way forward for Evolved UTRA multiple accessWord‑p. 9

The following has been considered by TSG-RAN #30 (Dec'05):
  • When compared to the reference defined in TR 25.913, and based on the initial system-level evaluations with 5 MHz allocation, the spectral efficiency improvements achievable with a (CDMA-based) system according to an "evolutionary" approach and the spectral efficiency improvements achievable with a new approach (e.g. OFDM-based) are both attractive.
  • Using a CDMA based approach enables smoother migration from prior UTRA releases and might offer more extensive physical layer reuse.
  • On the other hand, a new Layer 1, with an inherent avoidance of a priori constraints in the air-interface design, allows for a more free choice of design parameters, making it easier to fulfil some of the E-UTRA targets e.g. latency requirements, finer minimum bandwidth granularity, commonality between different duplex modes.
  • UE receiver processing is somewhat simpler for an OFDMA-based air interface; the attractiveness in terms of complexity increases with larger bandwidths and/or high order MIMO configurations.
Both approaches to the 3GPP radio-access evolution have their advantages and disadvantages, very much depending on the exact requirements.
On this basis, TSG-RAN #30 has decided that the Long-Term Evolution feasibility study will focus on OFDMA based downlink and SC-FDMA based uplink. TSG-RAN #30 has also re-affirmed that continued evolution of existing UTRA modes is an on-going necessary work activity within 3GPP.

2  ReferencesWord‑p. 10

3  Definitions, symbols and abbreviationsWord‑p. 11

3.1  DefinitionsWord‑p. 11

3.2  SymbolsWord‑p. 11

3.3  AbbreviationsWord‑p. 11

4  IntroductionWord‑p. 12

5  RequirementsWord‑p. 13

6  General description of layer 1Word‑p. 13

7  Downlink conceptsWord‑p. 20

7.1  OFDMA (FDD / [TDD])Word‑p. 20

7.1.1  Basic transmission schemeWord‑p. 20

7.1.2  Physical layer procedureWord‑p. 35

7.1.3  Physical layer measurementsWord‑p. 47

7.2  MC-WCDMA (FDD)Word‑p. 49

7.3  MC-TD-SCDMA (TDD)Word‑p. 57

8  Evaluation of techniques for evolved UTRA DLWord‑p. 60

9  UL ConceptsWord‑p. 71

9.1  SC-FDMA (FDD / [TDD])Word‑p. 71

9.1.1  Basic transmission schemeWord‑p. 71

9.1.2  Physical channel procedureWord‑p. 82

9.1.3  Physical layer measurementsWord‑p. 93

9.2  OFDMA (FDD / [TDD])Word‑p. 93

9.3  MC-WCDMA (FDD)Word‑p. 98

9.4  MC-TD-SCDMA (TDD)Word‑p. 103

10  Evaluation of techniques for evolved UTRA ULWord‑p. 104

11  Evaluation common for UL/DLWord‑p. 113

12  UE capabilitiesWord‑p. 114

A  Simulation scenariosWord‑p. 116

A.1  Link simulation ScenariosWord‑p. 116

A.2  System simulation scenarioWord‑p. 120

A.2.1  System simulation assumptionsWord‑p. 120

A.2.2  Multi-antenna subsystemsWord‑p. 126

A.2.2.1  MIMOWord‑p. 126

A.2.2.2  SDMA/BeamformingWord‑p. 127

A.2.3  System configuration and performance topicsWord‑p. 127

A.2.4  Examples of Cell and User throughput evaluationWord‑p. 127

A.3  E-UTRA physical layer framework for evaluationWord‑p. 129

A.3.1  DownlinkWord‑p. 129

A.3.2  UplinkWord‑p. 130

$  Change historyWord‑p. 132

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