1、 ETSI TR 1Universal Mobile TelSolutions for ene(3GPP TR 25.9TECHNICAL REPORT 125 927 V13.0.0 (2016elecommunications System (nergy saving within UTRA Nod.927 version 13.0.0 Release 1316-01) (UMTS); ode B 13) ETSI ETSI TR 125 927 V13.0.0 (2016-01)13GPP TR 25.927 version 13.0.0 Release 13Reference RTR/
2、TSGR-0125927vd00 Keywords UMTS 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 Grasse (06) N 7803/88 Important notice The present docu
3、ment 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 without the prior written authorization of ETSI. In ca
4、se of any existing or perceived difference in contents between such versions and/or in print, the only prevailing document is the print of the Portable Document Format (PDF) version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the docum
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7、ut the written authorization of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2016. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are Trade Marks of ETSI registered for the benefit of its Mem
8、bers. 3GPPTM and LTE are Trade Marks of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. GSM and the GSM logo are Trade Marks registered and owned by the GSM Association. ETSI ETSI TR 125 927 V13.0.0 (2016-01)23GPP TR 25.927 version 13.0.0 Release 13Intellectua
9、l 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 ETSI SR 000 314: “Intellectual Property Rights (IP
10、Rs); 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, no investigation, including IPR searches, has been
11、 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 Technical Report (TR) has been produced by ETSI 3rd Genera
12、tion 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 deliverables. The cross reference between GSM, UMTS, 3GPP a
13、nd 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 interpreted as described in clause 3.2 of the ETSI Drafting
14、 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 125 927 V13.0.0 (2016-01)33GPP TR 25.927 version 13.0.0 Release 13Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs te
15、rminology 2g3Foreword . 4g3Introduction 4g31 Scope 5g32 References 5g33 Definitions, symbols and abbreviations . 6g33.1 Definitions 6g33.2 Symbols 6g33.3 Abbreviations . 6g34 Scenarios 7g35 Energy Consumption of UMTS Node-Bs 7g36 Metrics for Evaluation 8g37 Technical Concepts 9g37.1 Dormant mode 9g3
16、7.1.1 Description of the concept 9g37.1.2 Analysis of the concept . 9g37.1.3 Pros 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
17、. z the third digit is incremented when editorial only changes have been incorporated in the document. Introduction Energy saving is important for operators for operational efficiency. Energy consumption is a significant operational cost factor for operators. In developing markets up to 30% of OPEX
18、is spent on energy. Energy efficiency is also of concern for our environmental objectives. For Macro base station, base station could account up to 80% of CO2 emission in a mobile network. Smaller cost effective nodes such as FemtoCells and PicoCells are increasingly being deployed. Whilst these nod
19、es require less power budget, they provide smaller coverage area. With increased data rate and more denser networks, need for energy efficiency is expected to increase further and so is the requirement for low energy base station technology. There is an increased focus on identifying opportunities f
20、or energy efficiency now then ever. ETSI ETSI TR 125 927 V13.0.0 (2016-01)53GPP TR 25.927 version 13.0.0 Release 131 Scope The present document summarizes the study done under the SI Solutions for energy saving within UTRA Node B defined in 1 by listing technical concepts addressing the objectives o
21、f the study item (see below), analysing these technical concepts and selecting the best solution (which might be a combination of technical concepts). The objective is to do an initial study to identify potential solutions to enable energy saving within UMTS Node-Bs, and do light initial evaluation
22、of the proposed solutions, with the aim that a subset of them can be taken forward for further investigation as part of a more focused study in 3GPP. The main objective is to save power of RBS but other savings are also to be investigated. Preference for solutions to be studied can be prioritized as
23、 follows. a) no impact to legacy or new UEs, b) no impact to legacy but impact to new UEs, c) impact to both, but minimise impact to legacy. Solutions that provide energy saving for UMTS NodeB are captured in this Technical report including the ones that do not require specification changes. - Energ
24、y saving of site support solutions and NodeB peripheral parts (e.g. rectifier, backup system, Cooling etc) are outside the scope of RAN1 studies. Non-backward compatible techniques are not excluded from discussion at this stage; the impact of the non-backward-compatibility on legacy terminals should
25、 be assessed. The present document provides the base for the following preparation of change requests to the corresponding RAN specifications if any solution are identified as beneficial require specification changes. 2 References The following documents contain provisions which, through reference i
26、n 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.
27、 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. 2 RP-091439 Study Item Solutions for energy saving within UTRA Node B Vodafone et all3GPP RAN #46
28、2 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“. 3 3GPP TS 25.211: “Physical channels and mapping of transport channels onto physical channels (FDD)“. 4 3GPP TS 25.212: “Multiplexing and channel coding (FDD)“. 5 3GPP TS 25.213: “Spreading and modulation (FDD)“. 6 3GPP TS 25.214: “ Physical la
29、yer procedures (FDD)“. 7 3GPP TS 25.215: “Physical layer Measurements (FDD)“. 8 3GPP TS 25.306: “UE Radio Access Capabilities“. ETSI ETSI TR 125 927 V13.0.0 (2016-01)63GPP TR 25.927 version 13.0.0 Release 139 3GPP TS 25.308: “UTRA High Speed Downlink Packet Access (HSDPA); Overall description; Stage
30、 2“. 10 3GPP TS 25.309: “FDD Enhanced Uplink; Overall description; Stage 2“. 11 3GPP TS 25.321: “Medium Access Control (MAC) protocol specification“. 12 3GPP TS 25.331: “Radio Resource Control (RRC) Protocol Specification“. 13 3GPP TS 25.433: “UTRAN Iub Interface NBAP Signalling“. 14 3GPP TS 25.133:
31、 “Requirements for Support of Radio Resource Management (FDD)“. 15 ETSI TS 102 706, Energy Efficiency of Wireless Access Network Equipment. 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions given in . and the follow
32、ing apply. example: text used to clarify abstract rules by applying them literally. 3.2 Symbols For the purposes of the present document, the following symbols apply: 3.3 Abbreviations For the purposes of the present document, the following abbreviations apply: ACK Acknowledgement CQI Channel Qualit
33、y Indicator CRC Cyclic Redundancy Check DCH Dedicated Channel DL Downlink DPCCH Dedicated Physical Control Channel DPCH Dedicated Physical Channel DPDCH Dedicated Physical Data Channel DTX Discontinuous Transmission E-DCH Enhanced Dedicated Channel E-DPCCH E-DCH Dedicated Physical Control Channel E-
34、DPDCH E-DCH Dedicated Physical Data Channel E-AGCH E-DCH Absolute Grant Channel E-HICH E-DCH HARQ Acknowledgement Indicator Channel E-RGCH E-DCH Relative Grant Channel F-DPCH Fractional Dedicated Physical Channel HSDPA High Speed Downlink Packet Access HS-DSCH High Speed Downlink Shared Channel HS-P
35、DSCH High Speed Physical Downlink Shared Channel HS-SCCH High Speed Physical Downlink Shared Control Channel NACK Negative Acknowledgement P-CCPCH Primary Common Control Physical Channel RBS Radio Base Station RL Radio Link S-CCPCH Secondary Common Control Physical Channel SCH Synchronisation Channe
36、l SIR Signal-to-Interference RatioETSI ETSI TR 125 927 V13.0.0 (2016-01)73GPP TR 25.927 version 13.0.0 Release 13TFC Transport Format Combination TPC Transmit Power Control TTI Transmission Time Interval UE User Equipment UL Uplink UTRAN UMTS Terrestrial Radio Access Network 4 Scenarios RBS configur
37、ation specified in 15 is to be used as a baseline. Below are list of aspects that could be used to characterise the energy saving scenarios: Deployment and coverage: o UTRAN only, single cell, single carrier coverage o UTRAN only, single cell, multi-carrier coverage o UTRAN only, multiple inter-freq
38、uency cells with different coverage (e.g. hot spot and overlay network) o Inter-RAT multiple cell Coverage (e.g. UMTS/GSM or UMTS/LTE) NodeB configuration o Number of sectors and carriers o MIMO / non-MIMO o NodeB type: Macro NodeB (Concentrated, Distributed), Home NodeB o single-carrier, dual-carri
39、er, multi-carrier. Assumptions on traffic load and type: o Traffic load: empty cell, low, medium, high o Number of active users o Traffic variation: static, dynamic o Traffic type: Mix of R99 HSDPA and HSUPA 5 Energy Consumption of UMTS Node-Bs The components listed below are the main parts in an No
40、deB energy consumption breakdown, containing BBU, REs, power supply, coaxial feed, and other related consumptions. The relation in Table 1 is summarized based on a variety of configurations of macro NodeBs under a low load assumption specified as 10% in 15. Table 1: Power Consumption breakdown of an
41、 UMTS NodeB UMTS NodeB power consumption Qualitative contribution to Total Power Consumption 3GPP TR 25.927 version 13.0.0 Release 13Base Band Unit (BBRadio Equipments (Primary DC Power S(i.e. rectifiers, batteCoaxial feed pressurization/dehydrOther related consumption(like flighting, alarm, etcFrom
42、 the Table 1, BBU and REs correspondmain focus of this study. However, even if those elements correspond tNodeB type and configurations, their absoluteconfigurations, e.g. MIMO and non-MIMO, cconfiguration still plays an important role for definitions of the scenarios as outlined above6 Metrics for
43、EvaluETSI ETSI TR 125 927 V13.0.0 (2016-01)93GPP TR 25.927 version 13.0.0 Release 137 Technical Concepts This section describes and analyses the suggested technical concepts addressing the problem described by the study item Solutions for energy saving within UTRA Node B defined in 1. 7.1 Dormant mo
44、de 7.1.1 Description of the concept It may be possible to obtain significant energy savings by switching off one or more carriers. Even if a downlink carrier cannot be switched off, there could be significant energy savings by just reducing its transmit power. Deactivation triggered by the RNC: The
45、CRNC may control the carrier deactivation on a relatively slow time basis by removing the cell completely or moving it to dormant mode 13. Then Node B can switch off the carrier under completely controlled circumstances since no SRNC will attempt to configure UEs with that cell. Any UEs within the c
46、ell would need to move to some other cell, e.g. a different carrier from the same Node B or to a different Node B. If the carrier is deactivated in an orderly fashion, e.g. by ramping down the power during a suitable time period before switching off completely, the normal mobility procedures should
47、result in handovers (soft handover, inter-frequency handover or IRAT handover) and cell reselections from the cell being deactivated to other cells available to the affected UEs. This power ramping is a Node B implementation issue although various enhancements to the control signaling over the netwo
48、rk interface(s) can also be envisioned. Deactivation triggered by the Node B: If there are no UE(s) configured with a particular carrier as its primary carrier, then Node B may be able to switch off that carrier autonomously already within the existing standard if it knows that there are other carri
49、ers with fully overlapping coverage or that there can be no UEs camping on that carrier. If the carrier serves as the secondary carrier for a MC-HSPA UE, Node B may choose to send an HS-SCCH order for secondary carrier deactivation to that UE to make the UE stop monitoring the secondary carrier before Node B actually switches off the carrier. Switching off the carrier will not only save energy but also reduce the inter-cell interference. Then, whenever the carrier is needed again, Node B can switch on the
