Content for TR 45.860 Word version: 11.5.0
0 Introduction
1 Scope
2 References
3 Definitions and abbreviations
3.1 Definitions
3.3 Abbreviations
4 Objectives
4.1 Performance Objectives
4.2 Compatibility Objectives
...
...
0 Introduction p. 7
The concept of Precoded EGPRS2 - PC EGPRS2 - DL has recently shown to provide significant performance gains for EGPRS2. Gains are expected both in interference and sensitivity limited scenarios, allowing significant increase to both data capacity and spectral efficiency for EGPRS2.
Performing precoding of EGPRS2 modulated data is expected to increase robustness of the system significantly while keeping the spectral properties of the signal intact.
1 Scope p. 8
The present document contains the results from the 3GPP study item on Signal Precoding Enhancements for EGPRS2 DL, SPEED.
The following is covered by the study:
- Objectives for the study
- Common assumptions to be used in the evaluation
- Technical work and performance evaluations based on the objectives
2 References p. 8
The following documents contain provisions which, through reference in this text, constitute provisions of the present document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or non specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same Release as the present document.
[1]
TR 21.905: "Vocabulary for 3GPP Specifications".
[2]
GP-101088 "New SI proposal: Signal Precoding Enhancements for EGPRS2 DL", source Telefon AB LM Ericsson, ST-Ericsson SA, Telecom Italia S.p.A, Vodafone Group Plc, China Mobile Com. Corp. ZTE Corporation, Huawei Technologies Co. Ltd.
[3]
TS 45.003: v8.3.0 "Channel coding"
[4]
TS 45.005: v9.3.0 "Radio transmission and reception"
3 Definitions and abbreviations p. 8
3.1 Definitions p. 8
For the purposes of the present document, the terms and definitions given in TR 21.905 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905.
3.3 Abbreviations p. 8
For the purposes of the present document, the abbreviations given in TR 21.905 and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905.)
BMD
Blind Modulation Detection
CP
Cyclic Prefix
DAS
Downlink level A modulation and coding scheme
DBS
Downlink level B modulation and coding scheme
DFT
Discrete Fourier Transform
HSR
Higher Symbol Rate
MCS
Modulation and coding scheme
NSR
Normal Symbol Rate
PAR
Peak-to-Average Ratio
PC EGPRS2
Precoded EGPRS2
SPEED
Signal Precoding Enhancements for EGPRS2 DL
TSC
Training Sequence Code
USF
Uplink State Flag
4 Objectives p. 9
4.1 Performance Objectives p. 9
4.1.1 Improved EGPRS2 throughput p. 9
The introduction of Precoded EGPRS2, PC EGPRS2, shall significantly improve data throughput performance as compared to realistic EGPRS2 performance.
4.2 Compatibility Objectives p. 9
4.2.1 Spectral properties p. 9
PC EGPRS2 shall obey the current spectral requirements on spectrum due to modulation and wideband noise and on switching transients of EGPRS2 DL [4].
4.2.2 Impact to legacy service p. 9
The impact of PC EGPRS2 on GSM speech codecs, GPRS, EGPRS and EGPRS2 shall be kept at a minimum. Impact on cell reselection performance of mobile stations should be avoided by operation of PC EGPRS2 on the BCCH carrier. Impacts from PAN and USF multiplexing on PC-EGPRS2 and legacy user throughput should be minimized.
4.2.3 Implementation impact to base stations p. 9
The introduction of Precoded EGPRS2 in the base station transmitter should change BTS hardware as little as possible.
It is recommended for each candidate techinque to state compliance with Radix size used in LTE up to 5 (e.g. 2, 3, 5) in the complexity evaluation in order for the BTS to have an efficient implementation.
4.2.4 Implementation impact to mobile station p. 9
The introduction of Precoded EGPRS2 in the mobile station receiver should change MS hardware as little as possible. Both impact to stand-alone PC-EGPRS2 platforms and combined EGPRS2 and PC-EGPRS2 platforms shall be considered.
It is recommended for each candidate techinque to state compliance with Radix size used in LTE up to 5 (e.g. 2, 3, 5) in the complexity evaluation in order for the UE to have an efficient implementation.
