TR 25.814
Physical layer aspect for
evolved Universal Terrestrial Radio Access (UTRA)
V7.1.0 (Wzip)
2006/10 132 p.
- Rapporteur:
- Dr. Abeta, Sadayuki
full Table of Contents for TR 25.814 Word version: 7.1.0
1 Scope Word‑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:
- FDD UL based on SC-FDMA, FDD DL based on OFDMA
- FDD UL based on OFDMA, FDD DL based on OFDMA
- FDD UL/DL based on MC-WCDMA
- TDD UL/DL based on MC-TD-SCDMA
- TDD UL/DL based on OFDMA
- 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 access Word‑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.
2 References Word‑p. 10
3 Definitions, symbols and abbreviations Word‑p. 11
4 Introduction Word‑p. 12
5 Requirements Word‑p. 13
6 General description of layer 1 Word‑p. 13
6.1 Multiband operation Word‑p. 13
6.1.1 MC-WCDMA based proposal Word‑p. 13
6.2 Duplexing Word‑p. 13
6.2.1 TDD mode aspects for OFDMA and SC-FDMA Word‑p. 13
6.2.1.1 Approach 1 -Multiple fixed frame structures Word‑p. 14
6.2.1.1.1 For co-existence with LCR-TDD Word‑p. 14
6.2.1.1.2 For co-existence with HCR-TDD Word‑p. 15
6.2.1.2 Approach 2 -Generic frame structure Word‑p. 16
6.2.2 Duplexing for the MC-WCDMA based proposal Word‑p. 19
6.2.2.1 Unpaired spectrum use cases Word‑p. 19
6.2.2.2 Time duplex operation Word‑p. 19
7 Downlink concepts Word‑p. 20
7.1 OFDMA (FDD / [TDD]) Word‑p. 20
7.1.1 Basic transmission scheme Word‑p. 20
7.1.1.1 Modulation scheme Word‑p. 22
7.1.1.1.1 Basic modulation scheme Word‑p. 22
7.1.1.1.2 Enhanced modulation scheme Word‑p. 22
7.1.1.2 Multiplexing including reference-signal structure Word‑p. 26
7.1.1.2.1 Downlink data multiplexing Word‑p. 26
7.1.1.2.2 Downlink reference-signal structure Word‑p. 27
7.1.1.2.3 Downlink L1/L2 Control Signaling Word‑p. 28
7.1.1.3 Channel coding and physical channel mapping Word‑p. 30
7.1.1.4 MIMO and Transmit Diversity Word‑p. 30
7.1.1.4.1 Transmit Diversity for Control Channel Word‑p. 30
7.1.1.4.2 Aspects for LTE MIMO Word‑p. 31
7.1.1.4.3 High level principles of MIMO for unicast traffic Word‑p. 31
7.1.1.4.4 High level principles of MIMO for E-MBMS Word‑p. 32
7.1.1.5 Downlink macro diversity Word‑p. 33
7.1.1.6 MBMS Word‑p. 33
7.1.2 Physical layer procedure Word‑p. 35
7.1.2.1 Scheduling Word‑p. 35
7.1.2.2 Link adaptation Word‑p. 35
7.1.2.3 HARQ Word‑p. 36
7.1.2.4 Cell search Word‑p. 37
7.1.2.4.1 Purposes of the SCH, BCH, and reference symbols and information to be detected in the cell search Word‑p. 37
7.1.2.4.2 Structure in time Word‑p. 38
7.1.2.4.3 Structure in frequency Word‑p. 40
7.1.2.4.4 Transmit diversity for SCH and BCH transmission Word‑p. 42
7.1.2.4.5 SCH signal structure Word‑p. 42
7.1.2.4.6 Cell search procedure Word‑p. 43
7.1.2.5 Power control Word‑p. 45
7.1.2.6 Inter-cell interference mitigation Word‑p. 45
7.1.2.6.1 Inter-cell-interference randomization Word‑p. 45
7.1.2.6.2 Inter-cell-interference cancellation Word‑p. 46
7.1.2.6.3 Inter-cell-interference co-ordination/avoidance Word‑p. 46
7.1.2.7 Inter-Node B Synchronization Word‑p. 47
7.1.3 Physical layer measurements Word‑p. 47
7.1.3.1 UE measurements Word‑p. 47
7.1.3.1.1 Measurements for Scheduling Word‑p. 47
7.1.3.1.2 Measurements for Mobility Word‑p. 48
7.1.3.2 E-UTRAN measurements Word‑p. 49
7.2 MC-WCDMA (FDD) Word‑p. 49
7.2.1 High level principles Word‑p. 49
7.2.2 Basic Transmission Scheme Word‑p. 50
7.2.2.1 Definitions Word‑p. 50
7.2.2.2 WCDMA LCR system numerology Word‑p. 50
7.2.2.3 Assumptions for MC-WCDMA operation in DL Word‑p. 51
7.2.2.4 DL Single-carrier PHY Channels Word‑p. 52
7.2.2.5 DL Multi-Carrier PHY Channels Word‑p. 53
7.2.2.5.1 N/M Asymmetry considerations Word‑p. 53
7.2.3 Physical Layer Procedures Word‑p. 54
7.2.3.1 DL PHY channels timing considerations Word‑p. 54
7.2.3.2 Synchronization Procedures: Cell Search Word‑p. 55
7.2.3.2.1 "Cold" Acquisition Word‑p. 55
7.2.3.2.2 "Warm" Acquisition Word‑p. 55
7.2.3.3 Synchronization Procedures: Synchronization of Dedicated channels Word‑p. 55
7.2.3.3.1 Procedure A Word‑p. 55
7.2.3.3.2 Procedure B Word‑p. 56
7.2.3.4 Power Control: DL PC Word‑p. 56
7.2.3.5 HS-DSCH Related Procedures Word‑p. 56
7.2.4 Physical layer measurements Word‑p. 56
7.2.4.1 UE measurements Word‑p. 56
7.2.4.2 Measurements support for mobility Word‑p. 57
7.3 MC-TD-SCDMA (TDD) Word‑p. 57
7.3.1 Basic transmission scheme Word‑p. 57
7.3.1.1 Modulation scheme Word‑p. 59
7.3.1.2 Multiplexing including pilot structure Word‑p. 59
7.3.1.3 Channel Coding and physical channel mapping Word‑p. 59
7.3.1.4 MIMO and beam-forming Word‑p. 59
7.3.2 Physical layer procedure Word‑p. 59
7.3.2.1 Scheduling Word‑p. 59
7.3.2.2 Link adaptation Word‑p. 59
7.3.2.3 HARQ Word‑p. 59
7.3.2.4 Cell search Word‑p. 59
7.3.2.5 Power control Word‑p. 59
7.3.3 Physical layer measurements Word‑p. 60
7.3.3.1 UE measurements Word‑p. 60
7.3.3.2 Measurements support for mobility Word‑p. 60
8 Evaluation of techniques for evolved UTRA DL Word‑p. 60
8.1 Performance evaluation Word‑p. 60
8.1.1 Traffic outage and latency requirements Word‑p. 60
8.1.2 Evaluation against reference Word‑p. 61
8.1.2.1 Evaluation for MC-WCDMA based evolved UTRA DL Word‑p. 61
8.1.2.2 Evaluation for OFDMA based evolved UTRA DL Word‑p. 61
8.1.2.2.1 Peak rate evaluation Word‑p. 61
8.1.2.2.2 Throughput evaluation Word‑p. 63
8.1.2.2.3 DL VoIP Evaluation Word‑p. 68
8.1.3 Evaluation of OFDM based Multicast for evolved UTRA Word‑p. 69
8.2 Analysis of UE complexity Word‑p. 70
8.2.1 WCDMA based evolved UTRA downlink Word‑p. 70
8.2.1.1 Baseband Word‑p. 70
8.3 Analysis of Node B impacts Word‑p. 70
8.3.1 WCDMA based evolved UTRA downlink Word‑p. 70
8.3.1.1 Baseband Word‑p. 70
9 UL Concepts Word‑p. 71
9.1 SC-FDMA (FDD / [TDD]) Word‑p. 71
9.1.1 Basic transmission scheme Word‑p. 71
9.1.1.1 Modulation scheme Word‑p. 74
9.1.1.2 Multiplexing including reference signal structure Word‑p. 74
9.1.1.2.1 Uplink data multiplexing Word‑p. 74
9.1.1.2.2 Uplink reference-signal structure Word‑p. 75
9.1.1.2.3 Multiplexing of L1/L2 control signaling Word‑p. 77
9.1.1.2.4 Uplink L1/L2 Control Signaling Word‑p. 79
9.1.1.3 Channel coding and physical channel mapping Word‑p. 81
9.1.1.4 MIMO and Transmit Diversity Word‑p. 81
9.1.1.5 Uplink macro diversity Word‑p. 81
9.1.1.6 Power De-rating Reduction Word‑p. 81
9.1.2 Physical channel procedure Word‑p. 82
9.1.2.1 Random access procedure Word‑p. 82
9.1.2.1.1 Non-synchronized random access Word‑p. 82
9.1.2.1.2 Synchronized random access: Word‑p. 86
9.1.2.2 Scheduling Word‑p. 87
9.1.2.3 Link adaptation Word‑p. 88
9.1.2.4 Power control Word‑p. 90
9.1.2.4.1 Slow Power Control Word‑p. 90
9.1.2.4.2 Power Control based upon neighbour cell load Word‑p. 90
9.1.2.5 HARQ Word‑p. 90
9.1.2.6 Uplink timing control Word‑p. 91
9.1.2.7 Inter-cell interference mitigation Word‑p. 91
9.1.3 Physical layer measurements Word‑p. 93
9.1.3.1 Node B measurements Word‑p. 93
9.2 OFDMA (FDD / [TDD]) Word‑p. 93
9.2.1 Basic transmission scheme Word‑p. 93
9.2.1.1 Modulation scheme Word‑p. 94
9.2.1.2 Multiplexing including pilot structure Word‑p. 94
9.2.1.3 MIMO Word‑p. 96
9.2.1.4 Peak to Average Power Ratio (PAPR) and its Reduction Word‑p. 96
9.2.1.4.1 Tone reservation PAPR reduction method Word‑p. 96
9.2.1.4.2 Circulated clipping and filtering Word‑p. 98
9.3 MC-WCDMA (FDD) Word‑p. 98
9.3.1 High level principles Word‑p. 98
9.3.2 Basic Transmission Scheme Word‑p. 99
9.3.2.1 Definitions Word‑p. 99
9.3.2.2 Assumptions for MC-WCDMA operation in UL Word‑p. 99
9.3.2.3 UL Single-carrier PHY Channels Word‑p. 100
9.3.2.4 UL Multi-Carrier PHY Channels Word‑p. 100
9.3.2.4.1 N/M Asymmetry considerations Word‑p. 101
9.3.3 Physical Layer Procedures Word‑p. 102
9.3.3.1 PHY channels timing considerations Word‑p. 102
9.3.3.2 Power Control: UL PC Word‑p. 102
9.3.3.3 Random Access Procedure Word‑p. 102
9.3.3.4 E-DCH Related Procedures Word‑p. 103
9.3.4 Physical layer measurements Word‑p. 103
9.3.4.1 Node B measurements Word‑p. 103
9.4 MC-TD-SCDMA (TDD) Word‑p. 103
9.4.1 Basic transmission scheme Word‑p. 103
9.4.1.1 Modulation scheme Word‑p. 103
9.4.1.2 Multiplexing including pilot structure Word‑p. 103
9.4.1.3 Channel Coding and physical channel mapping Word‑p. 103
9.4.1.4 MIMO and beamforming Word‑p. 104
9.4.2 Physical channel procedure Word‑p. 104
9.4.2.1 Random access procedure Word‑p. 104
9.4.2.2 Scheduling Word‑p. 104
9.4.2.3 Link adaptation Word‑p. 104
9.4.2.4 Power control Word‑p. 104
9.4.2.5 HARQ Word‑p. 104
9.4.2.6 Uplink timing control Word‑p. 104
10 Evaluation of techniques for evolved UTRA UL Word‑p. 104
10.1 Performance evaluation Word‑p. 104
10.1.1 Evaluation against reference Word‑p. 104
10.1.1.1 MC-WCDMA based evolved UTRA UL Word‑p. 105
10.1.1.2 OFDMA based evolved UTRA UL Word‑p. 105
10.1.1.3 Evaluation of SC-FDMA based evolved UTRA UL Word‑p. 105
10.1.1.3.1 Peak rate evaluation Word‑p. 105
10.1.1.3.2 Throughput evaluation Word‑p. 107
10.1.1.3.3 UL VoIP evaluation Word‑p. 109
10.1.2 Evaluation between evolved UTRA UL proposals Word‑p. 111
10.1.2.1 Comparison between MC-WCDMA and OFDMA Word‑p. 111
10.1.2.2 Comparison between SC-FDMA and OFDMA Word‑p. 112
10.1.2.3 Evaluation of Multi-user MIMO Word‑p. 112
10.2 Analysis of UE complexity Word‑p. 113
10.3 Analysis of Node B impacts Word‑p. 113
11 Evaluation common for UL/DL Word‑p. 113
11.1 Analysis of U-plane Latency Word‑p. 113
11.2 Physical layer complexity Word‑p. 114
12 UE capabilities Word‑p. 114
12.1 UE bandwidth capabilities Word‑p. 114
12.1.1 Downlink bandwidth capabilities Word‑p. 114
12.1.2 Uplink bandwidth capabilities Word‑p. 114
12.2 UE antenna capabilities Word‑p. 115
12.2.1 Receive-antenna capabilities Word‑p. 115
12.2.2 Transmit-antenna capabilities Word‑p. 115
A Simulation scenarios Word‑p. 116
A.1 Link simulation Scenarios Word‑p. 116
A.1.1 Link simulation assumptions Word‑p. 116
A.1.2 Maximum SNR per channel Word‑p. 116
A.1.3 Multi-Antenna Link level channel models Word‑p. 117
A.2 System simulation scenario Word‑p. 120
A.2.1 System simulation assumptions Word‑p. 120
A.2.1.1 Reference system deployments Word‑p. 120
A.2.1.1.1 Cell dimensions Word‑p. 120
A.2.1.1.2 Downlink and uplink numerology Word‑p. 123
A.2.1.2 Channel models Word‑p. 123
A.2.1.2.1 Multi-path channel models & early simulations Word‑p. 123
A.2.1.2.2 Spatial channel model (SCM) Word‑p. 123
A.2.1.3 Traffic models Word‑p. 123
A.2.1.3.1 Latency analysis Word‑p. 124
A.2.1.4 System performance metrics Word‑p. 124
A.2.1.5 Reference Release 6 (UTRA) UE Word‑p. 124
A.2.1.6 Reference EUTRA UE Word‑p. 124
A.2.1.7 Reference Release 6 (UTRA) Node-B Word‑p. 125
A.2.1.8 Reference EUTRA Node-B Word‑p. 125
A.2.1.9 Scheduling & resource allocation Word‑p. 126
A.2.1.9.1 Proportional fair or other scheduling Word‑p. 126
A.2.1.9.2 Fairness criteria Word‑p. 126
A.2.2 Multi-antenna subsystems Word‑p. 126
A.2.2.1 MIMO Word‑p. 126
A.2.2.2 SDMA/Beamforming Word‑p. 127
A.2.3 System configuration and performance topics Word‑p. 127
A.2.3.1 Frequency re-use assessment Word‑p. 127
A.2.3.2 Frame signaling reliability [TBD] Word‑p. 127
A.2.3.3 Macro diversity performance Word‑p. 127
A.2.3.4 Timing synchronization Word‑p. 127
A.2.3.5 RACH channel performance [TBD] Word‑p. 127
A.2.4 Examples of Cell and User throughput evaluation Word‑p. 127
A.3 E-UTRA physical layer framework for evaluation Word‑p. 129
A.3.1 Downlink Word‑p. 129
A.3.2 Uplink Word‑p. 130
$ Change history Word‑p. 132
