1、 ETSI TR 136 932 V13.0.0 (2016-01) LTE; Scenarios and requirements for small cell enhancements for E-UTRA and E-UTRAN (3GPP TR 36.932 version 13.0.0 Release 13) TECHNICAL REPORT ETSI ETSI TR 136 932 V13.0.0 (2016-01)13GPP TR 36.932 version 13.0.0 Release 13Reference RTR/TSGR-0036932vd00 Keywords LTE
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7、f 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 Members. 3GPPTM and LTE are Trade
8、 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 136 932 V13.0.0 (2016-01)23GPP TR 36.932 version 13.0.0 Release 13Intellectual Property Rights IPRs essenti
9、al 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 (IPRs); Essential, or potentially
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11、ntee 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 Generation Partnership Project (3GPP
12、). 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 and ETSI identities can be foun
13、d 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 Rules (Verbal forms for the e
14、xpression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct citation. ETSI ETSI TR 136 932 V13.0.0 (2016-01)33GPP TR 36.932 version 13.0.0 Release 13Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 S
15、cope 5g32 References 5g33 Definitions, symbols and abbreviations . 5g33.1 Definitions 5g33.2 Symbols 5g33.3 Abbreviations . 5g34 Introduction 6g35 Objective 6g36 Target scenarios 7g36.1 Deployment 7g36.1.1 With and without macro coverage 7g36.1.2 Outdoor and indoor . 7g36.1.3 Ideal and non-ideal bac
16、khaul 7g36.1.4 Sparse and dense . 8g36.1.5 Synchronization 8g36.2 Spectrum. 8g36.3 Traffic . 9g36.4 Backward compatibility . 9g37 Deployment-related requirements 10g37.1 Deployment use cases 10g37.2 Co-existence and interworking . 10g37.3 Core network aspects 10g38 Capability and performance require
17、ments 11g38.1 System performance . 11g38.2 Mobility performance . 11g38.3 Coverage performance . 11g39 Operational Requirements 12g39.1 Architecture 12g39.2 Cost and complexity . 12g39.3 Energy efficiency . 12g39.4 Security 12g3Annex A: Change history 13g3History 14g3ETSI ETSI TR 136 932 V13.0.0 (20
18、16-01)43GPP TR 36.932 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 subject to continuing work within the TSG and may change following formal TSG approval. Should the TSG modify the
19、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 first digit: 1 presented to TSG for information; 2 presented to TSG for approval; 3 or greater indicates TSG approve
20、d 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 editorial only changes have been incorporated in the document. ETSI ETSI TR 136 932 V13.0.0 (2016-01)53GPP TR
21、 36.932 version 13.0.0 Release 131 Scope The present document contains scenarios and requirements for the small cell enhancement for E-UTRA and E-UTRAN. 2 References The following documents contain provisions which, through reference in this text, constitute provisions of the present document. Refer
22、ences 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 d
23、ocument), 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 TS 36.839: “Evolved Universal Terrestrial Radio Access (E-UTRA); Mobility enhancements in heterogene
24、ous networks“. 3 3GPP TR 36.913: “Requirements for further advancements for Evolved Universal Terrestrial Radio Access (E-UTRA) (LTE-Advanced)“. 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 f
25、ollowing apply. A term defined 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
26、 in TR 21.905 1 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 1. CDF: Cumulative Distribution Function VoLTE Voice over LTE ETSI ETSI TR 136 932 V13.0.0 (2016-01)63GPP TR 36.932 version 13.
27、0.0 Release 134 Introduction Small cells using low power nodes are considered promising to cope with mobile traffic explosion, especially for hotspot deployments in indoor and outdoor scenarios. A low-power node generally means a node whose Tx power is lower than macro node and BS classes, for examp
28、le Pico and Femto eNB are both applicable. Small cell enhancements for E-UTRA and E-UTRAN will focus on additional functionalities for enhanced performance in hotspot areas for indoor and outdoor using low power nodes. This document captures the scenarios and requirements for small cell enhancements
29、. 3GPP TR 36.913 3 should be used as reference whenever applicable in order to avoid duplication of the requirements. 5 Objective The objectives of this document are as follows: A) Define target scenarios for small cell enhancement considering: - Deployment scenarios of small cell nodes - Spectrum u
30、sage for small cell scenarios - Traffic characteristics in small cell scenarios B) Define requirements for small cell enhancement scenarios considering: - System, mobility and coverage performance - Core network related aspects - Cost and energy efficiency aspects - Security aspects ETSI ETSI TR 136
31、 932 V13.0.0 (2016-01)73GPP TR 36.932 version 13.0.0 Release 136 Target scenarios 6.1 Deployment Small cell enhancement should target both with and without macro coverage, both outdoor and indoor small cell deployments and both ideal and non-ideal backhaul. Both sparse and dense small cell deploymen
32、ts should be considered. (See Fig. 6.1-1) NOTE 1: F1 and F2 are the carrier frequency for macro layer and local-node layer, respectively Figure 6.1-1: Deployment scenarios of small cell with/without macro coverage 6.1.1 With and without macro coverage As shown in Fig. 6.1-1, small cell enhancement s
33、hould target the deployment scenario in which small cell nodes are deployed under the coverage of one or more than one overlaid E-UTRAN macro-cell layer(s) in order to boost the capacity of already deployed cellular network. Two scenarios can be considered: 1. Where the UE is in coverage of both the
34、 macro cell and the small cell simultaneously 2. Where the UE is not in coverage of both the macro cell and the small cell simultaneously Figure 6.1-1 also shows the scenario where small cell nodes are not deployed under the coverage of one or more overlaid E-UTRAN macro-cell layer(s). This scenario
35、 is also the target of the small cell enhancement Study Item. 6.1.2 Outdoor and indoor Small cell enhancement should target both outdoor and indoor small cell deployments. The small cell nodes could be deployed indoors or outdoors, and in either case could provide service to indoor or outdoor UEs. F
36、or indoor UE, only low UE speed (0 3 km/h) is targeted. For outdoor, not only low UE speed, but also medium UE speed (up to 30km/h and potentially higher speeds) is targeted. Both throughput and mobility/connectivity shall be used as performance metric for both low and medium mobility. Cell edge per
37、formance (e.g. 5%-tile CDF point for user throughput) and power efficiency (of both network and UE) are also used as metrics for further study. 6.1.3 Ideal and non-ideal backhaul Both ideal backhaul (i.e., very high throughput and very low latency backhaul such as dedicated point-to-point connection
38、 using optical fiber) and non-ideal backhaul (i.e., typical backhaul widely used in the market such as xDSL, microwave, and other backhauls like relaying) should be studied. The performance-cost trade-off should be taken into account. F1 F2 ETSI ETSI TR 136 932 V13.0.0 (2016-01)83GPP TR 36.932 versi
39、on 13.0.0 Release 13A categorization of non-ideal backhaul based on operator inputs is listed in Table 6.1-1: Table 6.1-1: Categorization of non-ideal backhaul Backhaul Technology Latency (One way) Throughput Priority (1 is the highest) Fiber Access 1 10-30ms 10M-10Gbps 1 Fiber Access 2 5-10ms 100-1
40、000Mbps 2 Fiber Access 3 2-5ms 50M-10Gbps 1 DSL Access 15-60ms 10-100 Mbps 1 Cable 25-35ms 10-100 Mbps 2 Wireless Backhaul 5-35ms 10Mbps 100Mbps typical, maybe up to Gbps range 1 A categorization of ideal backhaul based on operator inputs is listed in Table 6.1-2: Table 6.1-2: Categorization of idea
41、l backhaul Backhaul Technology Latency (One way) Throughput Priority (1 is the highest) Fiber Access 4 (NOTE 1) less than 2.5 us (NOTE2) Up to 10Gbps 1 NOTE 1: This can be applied between the eNB and the remote radio head. NOTE 2: propagation delay in the fiber/cable is not included. For interfaces
42、between macro and small cell, as well as between small cells, the studies should first identify which kind of information is needed or beneficial to be exchanged between nodes in order to get the desired improvements before the actual type of interface is determined. And if direct interface should b
43、e assumed between macro and small cell, as well as between small cell and small cell, X2 interface can be used as a starting point. 6.1.4 Sparse and dense Small cell enhancement should consider sparse and dense small cell deployments. In some scenarios (e.g., hotspot indoor/outdoor places, etc.), si
44、ngle or a few small cell node(s) are sparsely deployed, e.g. to cover the hotspot(s). Meanwhile, in some scenarios (e.g., dense urban, large shopping mall, etc.), a lot of small cell nodes are densely deployed to support huge traffic over a relatively wide area covered by the small cell nodes. The c
45、overage of the small cell layer is generally discontinuous between different hotspot areas. Each hotspot area can be covered by a group of small cells, i.e. a small cell cluster. Furthermore, smooth future extension/scalability (e.g.: from sparse to dense, from small-area dense to large-area dense,
46、or from normal-dense to super-dense) should be considered. For mobility/ connectivity performance, both sparse and dense deployments should be considered with equal priority. 6.1.5 Synchronization Both synchronized and un-synchronized scenarios should be considered between small cells as well as bet
47、ween small cells and macro cell(s). For specific operations e.g. interference coordination, carrier aggregation and inter-eNB COMP, small cell enhancement can benefit from synchronized deployments with respect to small cell search/measurements and interference/resource management. Therefore time syn
48、chronized deployments of small cell clusters are prioritized in the study and new means to achieve such synchronization shall be considered. 6.2 Spectrum Small cell enhancement should address the deployment scenario in which different frequency bands are separately assigned to macro layer and small
49、cell layer, respectively, where F1 and F2 in Fig. 6.1-1 correspond to different carriers in different frequency bands. Small cell enhancement should be applicable to all existing and as well as future cellular bands, with special focus on higher frequency bands, e.g., the 3.5 GHz band, to enjoy the more available spectrum and wider bandwidth. Small cell enhancement should also take into account the possibility for frequency bands that, at least locally, are only used for small cell deployments. ETSI ETSI TR 136 932 V13.0.0 (2016-01)93GPP TR 36.932 ve
