1、 ETSI TR 1Evolved Universal TPotential solution(3GPP TR 36.9TECHNICAL REPORT 136 927 V13.0.0 (2016LTE; l Terrestrial Radio Access (E-ns for energy saving for E-UT.927 version 13.0.0 Release 1316-01) UTRA); RAN 13) ETSI ETSI TR 136 927 V13.0.0 (2016-01)13GPP TR 36.927 version 13.0.0 Release 13Referen
2、ce RTR/TSGR-0336927vd00 Keywords LTE 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 presen
3、t 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 without the prior written authorization of ETSI.
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7、 without 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 i
8、ts Members. 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 136 927 V13.0.0 (2016-01)23GPP TR 36.927 version 13.0.0 Release 13Intel
9、lectual 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 Righ
10、ts (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, no investigation, including IPR searches, ha
11、s 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 Technical Report (TR) has been produced by ETSI 3rd
12、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 deliverables. The cross reference between GSM, UMTS,
13、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 interpreted as described in clause 3.2 of the ETSI Dr
14、afting 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 136 927 V13.0.0 (2016-01)33GPP TR 36.927 version 13.0.0 Release 13Contents Intellectual Property Rights 2g3Foreword . 2g3Modal ve
15、rbs terminology 2g3Foreword . 4g3Introduction 5g31 Scope 6g32 References 7g33 Definitions, symbols and abbreviations . 8g33.1 Definitions 8g33.2 Symbols 8g33.3 Abbreviations . 8g34 General . 9g35 Inter-RAT energy saving 10g35.1 Study on inter-RAT scenario 1 . 10g35.1.1 Description of scenario 1 10g3
16、5.1.2 Energy saving procedures . 10g35.1.2.1 OAM-based solution for E-UTRAN cell entering or waking up from dormant mode 10g35.1.2.2 Signalling based solution for E-UTRAN cell entering or waking up from dormant mode . 11g35.1.2.3 How to exit dormant mode efficiently? . 11g35.1.3 Evaluations and comp
17、arisons 12g35.1.4 Conclusions. 13g36 Inter-eNB energy saving 14g36.1 Study on inter-eNB scenario 1 . 14g36.1.1 Description of scenario 1 14g36.1.2 Energy Saving Procedures 14g36.1.2.1 Baseline Rel-9 mechanisms 14g36.1.2.2 How to exit dormant mode efficiently 14g36.1.3 Evaluations and comparisons 15g
18、36.1.4 Conclusions. 16g36.2 Study on inter-eNB scenario 2 . 17g36.2.1 Description of scenario 2 17g36.2.2 Energy saving procedures . 17g36.2.2.1 OAM-based solution for E-UTRAN cell entering or waking up from dormant mode 17g36.2.2.2 Signalling based solution for E-UTRAN cell entering or waking up fr
19、om dormant mode . 18g36.2.2.3 Hybrid O 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 when edi
20、torial only changes have been incorporated in the document. ETSI ETSI TR 136 927 V13.0.0 (2016-01)53GPP TR 36.927 version 13.0.0 Release 13Introduction At present, sustainable development is a long-term commitment for all people in the world. This means not only development but also innovation. Peop
21、le should do their best to handle the resource shortage and environment deterioration. Therefore, how to improve the power efficiency and realize the power saving becomes a significant issue. In the telecom area, most mobile network operators aim at decreasing the power consumption without too much
22、impact on their network. In this case, the greenhouse emissions are reduced, while the OPEX of operators is saved. Thus, the power efficiency in the infrastructure and terminal becomes an essential part of the cost-related requirements in network, and there is a strong need to investigate possible n
23、etwork energy saving solutions. ETSI ETSI TR 136 927 V13.0.0 (2016-01)63GPP TR 36.927 version 13.0.0 Release 131 Scope The present document is the technical report for the study item on Network Energy Saving for E-UTRAN, which was approved at TSG RAN#47. The objective of the SI is to first identify
24、the relevant scenarios and then study and present the solutions that are applicable to EUTRAN energy saving. Furthermore, initial evaluation should be performed for each solution. ETSI ETSI TR 136 927 V13.0.0 (2016-01)73GPP TR 36.927 version 13.0.0 Release 132 References The following documents cont
25、ain 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-
26、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 3GPP TR 21.905: “Vocabulary for 3GPP Specificatio
27、ns“. 2 RP-100674: “Network Energy Saving for E-UTRAN “, CMCC. 3 3GPP TS 36.214: “Physical layer; Measurements “. 4 3GPP TS 36.300: “Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access (E-UTRAN); Overall description; Stage 2“. 5 3GPP TS 36.331: “E-UTRA;
28、RRC; Protocol specification Release 10“. ETSI ETSI TR 136 927 V13.0.0 (2016-01)83GPP TR 36.927 version 13.0.0 Release 133 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 de
29、fined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 1. 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 abbreviations given in TR 21.905 1 and the f
30、ollowing apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 1. eNB enhanced NodeB EPC Evolved Packet Core E-UTRAN Evolved UTRAN ES Energy SavingsESM Energy Savings Management FFS For Further Specification IoT Int
31、erference over Thermal LTE Long Term Evolution OAM Operations, Administration, Maintenance OPEX Operating Expenses RAN Radio Access Network SON Self-Organizing Networks TRX Transceiver UMTS Universal Mobile Telecommunications System UTRAN Universal Terrestrial Radio Access Network ETSI ETSI TR 136 9
32、27 V13.0.0 (2016-01)93GPP TR 36.927 version 13.0.0 Release 134 General The objective of this study item is to identify potential solutions for energy saving in E-UTRAN and perform initial evaluation of the proposed solutions, so that a subset of them can be used as the basis for further investigatio
33、n and standardization. The following use cases will be considered in this study item as defined in RP-100674 2: Intra-eNB energy saving Inter-eNB energy saving Inter-RAT energy saving Energy saving solutions identified in this study item should be justified by valid scenario(s), and based on cell/ne
34、twork load situation. Impacts on legacy and new terminals when introducing an energy saving solution should be carefully considered. The scope of the study item shall be as follows: User accessibility should be guaranteed when a cell transfers to energy saving mode Backward compatibility and the abi
35、lity to provide energy saving for Rel-10 network deployment that serves a number of legacy UEs Solutions shall not impact the Uu physical layer The solutions should not impact negatively the UE power consumption Note that energy saving for HeNB is out of the scope of this study item. ETSI ETSI TR 13
36、6 927 V13.0.0 (2016-01)103GPP TR 36.927 version 13.0.0 Release 135 Inter-RAT energy saving 5.1 Study on inter-RAT scenario 1 5.1.1 Description of scenario 1 Networks may consist of LTE cells deployed as capacity enhancement, overlaying existing and optimized 2G/3G network. Figure 5.1.1-1. Inter-RAT
37、energy saving scenario 1 Figure 5.1.1.1 shows scenario 1 in which E-UTRAN Cell C, D, E, F and G are totally covered by the same legacy RAT Cell A and B (e.g. UMTS or GSM). Cell A/B has been deployed to provide basic coverage of the services in the area, while other E-UTRAN cells boost the capacity.
38、The E-UTRAN cells are only deployed for capacity enhancement at some hot spots, therefore, the continuity of LTE coverage could not be guaranteed. The legacy network provides the basic coverage, for UEs with multi-mode capability. The energy saving solutions for this scenario should only be consider
39、ed in case the E-UTRAN is jointly deployed with legacy RAT (e.g. UMTS or GSM). It is up to operators policy whether service for LTE-only capable devices needs to be maintained. If all cells have the same multiple PLMNs in a network sharing scenario, there are no issues with the solutions to scenario
40、 1. Limitations related to other network sharing scenarios are not included within this Study Item. 5.1.2 Energy saving procedures To achieve energy savings in this inter-RAT energy savings scenario, two fundamental approaches, which differ in how capacity-booster E-UTRAN cells enter or wake up from
41、 dormant mode, can be used. These approaches are: 1. OAM-based approach 2. Signalling-based approach Furthermore, the energy saving policy may prefer not to switch off the E-UTRAN cells that are in an overlapping area between two or more basic coverage cells (handover region). 5.1.2.1 OAM-based solu
42、tion for E-UTRAN cell entering or waking up from dormant mode The approach is based on the complete set or a subset of following principles: ETSI ETSI TR 136 927 V13.0.0 (2016-01)113GPP TR 36.927 version 13.0.0 Release 13- E-UTRAN cells enters or leaves dormant mode based on centralized OAM decision
43、s, which are made based on statistical information obtained from coverage and/or GERAN/UTRAN/E-UTRAN cells, e.g. load information, traffic QCI, etc The OAM decisions can be pre-configured or directly signalled to the EUTRAN cells. - If an E-UTRAN cell enters or leaves dormant mode, its intra/inter-R
44、AT neighbour nodes should be informed either via OAM or signalling. 5.1.2.2 Signalling based solution for E-UTRAN cell entering or waking up from dormant mode The approach is based on the complete set or a subset of following principles: - E-UTRAN cells may decide to enter dormant mode autonomously
45、or based on information exchanging with the UTRAN/GERAN coverage cell. - Switch off decisions/requests will be based on information locally available in the EUTRAN node, including load information of both the coverage and E-UTRAN cells. - Switch-on may be performed based upon requests from one or mo
46、re neighbour inter-RAT nodes, or based on internal EUTRAN node policies (periodic switch on, max switch off time, etc,). - Intra-RAT and Inter-RAT neighbour nodes should be informed after on/off decision is made. - To perform energy saving more efficiently, some energy saving parameters may be excha
47、nged between inter-RAT neighbour cells if required, e.g. traffic thresholds, time duration, power consumption and so on. 5.1.2.3 How to exit dormant mode efficiently? Solution A: No assistance When some E-UTRAN cells are in dormant mode and the load increases on the UTRAN/GERAN coverage cells, the U
48、TRAN/GERAN coverage cells may not know the most appropriate E-UTRAN cells to wake-up. The overloaded coverage cells may request wake-up of one or more of the neighbouring dormant E-UTRAN cells. The final decision to leave dormant mode is however taken by the E-UTRAN cell based on information locally
49、 available. Some possible enhancements to optimize switch on decisions are reported below, whereby the actual switch on decision algorithm implementation could be based on one or several of these enhancements: Solution B: OAM predefined “low-load periods“ policies When the coverage UTRAN/GERAN cell detects high load, it uses a proprietary algorithm to decide which E-UTRAN cells should be activated. The algorithm could rely on pre-defined “low-load periods“ policies for each neighbour E-UTRAN cell. The “low-load periods“ information can fi
