1、 ETSI TR 1Digital cellular telecommSolutions for for (3GPP TR 45.9TECHNICAL REPORT 145 926 V13.0.0 (2016mmunications system (Phase or GSM/EDGE BTS Energy Sav.926 version 13.0.0 Release 13GLOBAL SYSTEMOBILE COMMUN16-02) e 2+) (GSM); aving 13) TEM FOR ICATIONSRETSI ETSI TR 145 926 V13.0.0 (2016-02)13G
2、PP TR 45.926 version 13.0.0 Release 13Reference DTR/TSGG-0145926vd00 Keywords GSM ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Gras
3、se (06) N 7803/88 Important notice The present document can be downloaded from: http:/www.etsi.org/standards-search The present document may be made available in electronic versions and/or in print. The content of any electronic and/or print versions of the present document shall not be modified wit
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9、3GPP TR 45.926 version 13.0.0 Release 13Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found in
10、 ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Policy,
11、 no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Foreword This Technic
12、al Report (TR) has been produced by ETSI 3rd Generation Partnership Project (3GPP). The present document may refer to technical specifications or reports using their 3GPP identities, UMTS identities or GSM identities. These should be interpreted as being references to the corresponding ETSI delivera
13、bles. The cross reference between GSM, UMTS, 3GPP and ETSI identities can be found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpre
14、ted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 145 926 V13.0.0 (2016-02)33GPP TR 45.926 version 13.0.0 Release 13Contents Intellect
15、ual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 5g3Introduction 5g31 Scope 6g32 References 6g33 Definitions, symbols and abbreviations . 7g33.1 Definitions 7g33.2 Symbols 7g33.3 Abbreviations . 7g34 Study Considerations 9g34.0 General . 9g34.1 Network Scenario Consideratio
16、ns 9g34.2 Energy Consumption of BTS . 9g35 Objectives . 10g35.1 Performance Objectives: energy efficiency target 10g35.2 Compatibility Objectives 10g35.2.1 Avoid impact to voice user call quality 10g35.2.2 Avoid impact to data user session quality . 10g35.2.3 Avoid impact to cell (re)selection and h
17、andover 10g35.2.4 Support of legacy MSs 10g35.2.5 Implementation impacts to new MSs 10g35.2.6 Implementation impacts to BSS 10g35.2.7 Impacts to network planning . 11g36 Common Assumptions . 11g36.1 Reference Configuration 11g36.2 Evaluation Metrics . 12g36.3 Traffic Load profiles 12g36.4 Reference
18、deployment scenarios 13g36.5 MS characteristics 16g36.5.1 BCCH carrier power measurement sampling . 16g36.5.1.1 Idle mode 16g36.5.1.2 Connected mode 18g36.5.2 BCCH carrier power measurement accuracy 18g36.5.3 BCCH carrier power measurement averaging 18g36.5.4 BSIC Decoding . 18g36.5.5 Power reductio
19、n on TS preceding BCCH timeslot . 19g36.5.6 Handover, Cell Selection and Cell Reselection 19g36.5.7 Mobile velocity . 19g36.5.8 Mobile station types 19g36.6 BTS characteristics . 19g36.6.1 Network synchronization 19g36.6.2 Modelling of TRX power consumption 20g37 Candidate Solution: BCCH Carrier Pow
20、er Reduction Methodology . 20g37.1 Introduction 20g37.2 Methodology 20g37.2.1 Variant 1 . 20g37.2.2 Variant 2 . 21g37.3 Evaluation. 21g3ETSI ETSI TR 145 926 V13.0.0 (2016-02)43GPP TR 45.926 version 13.0.0 Release 137.3.1 Simulation Assumptions . 22g37.3.2 Evaluations . 23g37.3.2.1 Impacts to Radiate
21、d Power and Power Consumption . 23g37.3.2.2 Impacts to Call Quality . 24g37.3.2.3 Impacts to Handover . 25g37.4 Conclusion 26g38 Candidate Solution: Output Power Reduction on BCCH Carrier for GMSK 27g38.1 Introduction 27g38.2 Concept Description . 27g38.2.1 Overview 27g38.2.2 Exemplary Scenario 27g3
22、8.3 Concept Evaluation 28g38.3.0 Overview 28g38.3.1 Simulation Model . 28g38.3.1.1 Simulation Assumptions . 28g38.3.1.2 Channel Allocation Strategies . 31g38.3.1.3 Deployment Scenarios and Network Layout . 31g38.3.1.4 Output Power Reduction Settings on BCCH carrier . 32g38.3.1.5 Employed Link-to-Sys
23、tem Mapping . 33g38.3.2 Simulation Results 33g38.3.2.1 Scenario S1 . 33g38.3.2.2 Scenario S2 . 34g38.3.2.3 Scenario S3 . 35g38.3.2.4 Scenario S4 . 36g38.3.2.5 Scenario M1 36g38.3.2.6 Scenario M2 37g38.3.2.7 Impact on performance of neighbour cell identification in connected mode 38g38.3.2.8 Impact o
24、n performance of neighbour cell identification in idle mode 39g38.3.2.9 Results for the alternative MS velocity . 41g38.3.2.9.1 Scenario S5 41g38.3.2.9.2 Scenario S6 42g38.3.2.9.3 Impact on performance of neighbour cell identification in connected mode . 43g38.3.2.9.4 Impact on performance of neighb
25、our cell identification in idle mode . 43g38.3.3 Impact to Specifications 44g38.3.3.2.1 Example implementation of option 2 in the specifications 47g38.3.3.3.1 Example implementation of option 3 in the specifications 50g310.5.2.11 Control Channel Description . 50g38.4 Conclusion 52g39 Summary and Con
26、clusions . 53g3Annex A: Bibliography 55g3Annex B: Change history 56g3History 57g3ETSI ETSI TR 145 926 V13.0.0 (2016-02)53GPP TR 45.926 version 13.0.0 Release 13Foreword This Technical Report has been produced by the 3rdGeneration Partnership Project (3GPP). The contents of the present document are s
27、ubject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an identifying change of release date and an increase in version number as follows: Version x.y.z where: x the fir
28、st digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approved document under change control. y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections, updates, etc. z the third digit is incremented w
29、hen editorial only changes have been incorporated in the document. Introduction Energy saving is important for operators operational efficiency. Energy consumption is a significant operational cost factor, for example in developing markets, up to 30% of OPEX is spent on energy. For one operator grou
30、p, almost 80% of base stations in Africa and India use diesel as the primary or as a backup power source. Furthermore, base stations account up to 80% of the total CO2emissions in a mobile operator network. Many operators have a target to cut CO2emissions as part of their environmental objectives. W
31、ith increasing voice usage, data usage (e.g. introduction of smart phones, MTC devices, etc.) and more dense networks, the thirst for energy consumption is expected to increase further, hence, motivating the need for low energy base station technology. Increasing the energy efficiency of base statio
32、ns or reducing the energy consumption of base stations will also facilitate the possibility for operators to power all types of base stations with alternative fuels and rely less on fossil fuels either from diesel generators or from the electricity grid. ETSI ETSI TR 145 926 V13.0.0 (2016-02)63GPP T
33、R 45.926 version 13.0.0 Release 131 Scope The present document provides a study into BTS energy saving solutions. The present document analyses and evaluates different solutions to determine the benefits provided compared to the legacy BTS energy consumption. In the scope of this study there are fol
34、lowing solutions: - Reduction of Power on the BCCH carrier (potentially enabling dynamic adjustment of BCCH power) - Reduction of power on DL common control channels - Reduction of power on DL channels in dedicated mode, DTM and packet transfer mode - Deactivation of cells (e.g. Cell Power Down and
35、Cell DTX like concepts as discussed in RAN 4) - Deactivation of other RATs in areas with multi-RAT deployments, for example, where the mobile station could assist the network to suspend/minimize specific in-use RATs at specific times of day - And any other radio interface impacted power reduction so
36、lutions The solutions will also consider the following aspects: - Impacts on the time for legacy and new mobile stations to gain access to service from the BTS - Impacts on legacy and new mobile stations to keep the ongoing service (without increasing drop rate) - Impacts on legacy and new mobile st
37、ations implementation and power consumption, e.g. due to reduction in DL power, cell (re-)selection performance, handover performance, etc. - Impacts on UL/DL coverage balance, especially to CS voice Solutions will be considered for both BTS energy saving non-supporting and supporting mobile station
38、s (i.e. solutions that are non-backwards compatible towards legacy mobile stations will be out of the scope of this study). The contents of the present document when stable will determine the modifications to existing GERAN specifications. 2 References The following documents contain provisions whic
39、h, 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,
40、 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 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 2 3GPP TR 41.0
41、01: “GSM Release specifications“. 3 ETSI TS 102 706: “Energy Efficiency of Wireless Access Network Equipment“. 4 3GPP TR 25.927: “Solutions for Energy Savings within UTRA NodeB“, V.10.0.0 5 3GPP TS 45.002: “Multiplexing and multiple access on the radio path“. 6 3GPP TS 45.008: “Radio subsystem link
42、control“. ETSI ETSI TR 145 926 V13.0.0 (2016-02)73GPP TR 45.926 version 13.0.0 Release 137 3GPP TR 45.913: “Optimized transmit pulse shape for downlink Enhanced General Packet Radio Service (EGPRS2-B)“. 8 3GPP TR 45.050: “Background for Radio Frequency (RF) requirements“. 9 3GPP TR 45.914: “Circuit
43、switched voice capacity evolution for GSM/EDGE Radio Access Network (GERAN)“. 10 3GPP TS 24.008: “Mobile radio interface Layer 3 specification; Core network protocols; Stage 3“. 11 3GPP TR 45.912: “Feasibility study for evolved GSM/EDGE Radio Access Network (GERAN)“. 12 3GPP TS 44.018: “Mobile radio
44、 interface layer 3 specification; Radio Resource Control (RRC) protocol“. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in TR 21.905 1 and the following apply. A term defined in the present document takes precedence
45、 over the definition of the same term, if any, in TR 21.905 1. busy hour: one hour period during which occurs the maximum total load in a given 24-hour period busy hour load: average BTS load during busy hour energy efficiency: relation between the useful output and energy/power consumption low load
46、: average BTS load during time when there is only very low traffic in network medium term load: defined BTS load level between busy hour and low load levels 3.2 Symbols Void. 3.3 Abbreviations For the purposes of the present document, the abbreviations given in TR 21.905 1 and the following apply. A
47、n abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 1. AFS Adaptive multirate Fullrate Speech AHS Adaptive multirate Halfrate Speech APD Average Power Decrease BBU Base Band Unit BHT Busy Hour Traffic BTS Base Transceiver
48、 Station DARP Downlink Advanced Receiver Performance EGPRS Enhanced General Packet Radio Service EGPRS2 Enhanced General Packet Radio Service phase 2 FTP File Transfer Protocol GoS Grade of Service IRC Interference Rejection Combining LA Link Adaptation MCBTS Multi-Carrier BTSMCPA Multi-Carrier Powe
49、r Amplifier NC1 Network Control mode 1 RE Radio Equipment SAIC Single Antenna Interference Cancellation ETSI ETSI TR 145 926 V13.0.0 (2016-02)83GPP TR 45.926 version 13.0.0 Release 13SCPA Single Carrier Power Amplifier TRX Transceiver VAMOS Voice services over Adaptive Multi-user channels on One Slot ETSI ETSI TR 145 926 V13.0.0 (2016-02)93GPP TR 45.926 version 13.0.0 Release 134 Study Considerations 4.0 General This clause depicts considerations on appropriate network scenarios and on qualitative analysis of the BTS energy consumption. 4.1
