1、 ETSI TS 138 202 V15.2.0 (2018-07) 5G; NR; Services provided by the physical layer (3GPP TS 38.202 version 15.2.0 Release 15) TECHNICAL SPECIFICATION ETSI ETSI TS 138 202 V15.2.0 (2018-07)13GPP TS 38.202 version 15.2.0 Release 15Reference DTS/TSGR-0138202vf20 Keywords 5G ETSI 650 Route des Lucioles
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13、ETSI of products, services or organizations associated with those trademarks. Foreword This Technical Specification (TS) 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 identi
14、ties 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 found under http:/webapp.etsi.org/key/queryform.asp. Modal verbs terminology In the present document “shall“, “shall
15、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 expression of provisions). “must“ and “must not“ are NOT allowed in ETSI deliverables except when used in direct c
16、itation. ETSI ETSI TS 138 202 V15.2.0 (2018-07)33GPP TS 38.202 version 15.2.0 Release 15Contents Intellectual Property Rights 2g3Foreword . 2g3Modal verbs terminology 2g3Foreword . 4g31 Scope 5g32 References 5g33 Definitions, symbols and abbreviations . 5g33.1 Definitions 5g33.2 Symbols 5g33.3 Abbre
17、viations . 5g34 Services and functions of the physical layer 6g34.1 General . 6g34.2 Overview of L1 functions . 6g35 Model of physical layer of the UE . 6g35.1 Uplink model 7g35.1.1 Uplink shared channel 7g35.1.2 Random access channel 7g35.2 Downlink model . 8g35.2.1 Downlink shared channel 8g35.2.2
18、 Broadcast channel . 8g35.2.3 Paging channel 9g36 Simultaneous transmission and reception of physical channels and physical signals 10g36.1 Uplink . 10g36.2 Downlink 11g37 Measurements provided by the physical layer . 12g37.1 UE measurements . 12g3Annex A (informative): Change history . 13g3History
19、14g3ETSI ETSI TS 138 202 V15.2.0 (2018-07)43GPP TS 38.202 version 15.2.0 Release 15Foreword This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP). The contents of the present document are subject to continuing work within the TSG and may change following for
20、mal 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 first digit: 1 presented to TSG for information; 2 presented to TSG for
21、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 editorial only changes have been incorporated in the document. ET
22、SI ETSI TS 138 202 V15.2.0 (2018-07)53GPP TS 38.202 version 15.2.0 Release 151 Scope The present document is a technical specification of the services provided by the physical layer of 5G-NR to upper layers. 2 References The following documents contain provisions which, through reference in this tex
23、t, constitute provisions of the present document. 1 3GPP TR 21.905: “Vocabulary for 3GPP Specifications“ 2 3GPP TS 38.201: “NR; Physical Layer General Description“ 3 3GPP TS 38.211: “NR; Physical channels and modulation“ 4 3GPP TS 38.212: “NR; Multiplexing and channel coding“ 5 3GPP TS 38.213: “NR;
24、Physical layer procedures for control“ 6 3GPP TS 38.214: “NR; Physical layer procedures for data“ 7 3GPP TS 38.215: “NR; Physical layer measurements“ 3 Definitions, symbols and abbreviations 3.1 Definitions For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 1
25、 and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP 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 abbr
26、eviations given in 3GPP 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 3GPP TR 21.905 1. For the purposes of the present document, the following abbreviations apply: ARQ Automatic Repeat R
27、equest BCH Broadcast Channel CA Carrier Aggregation CRC Cyclic Redundancy Check DC Dual Connectivity DL Downlink FEC Forward Error Correction GF Grant-Free MAC Medium Access Control MIMO Multiple Input Multiple Output PBCH Physical Broadcast Channel PCH Paging Channel PDCCH Physical Downlink Control
28、 Channel PDSCH Physical Downlink Shared Channel ETSI ETSI TS 138 202 V15.2.0 (2018-07)63GPP TS 38.202 version 15.2.0 Release 15PRACH Physical Random Access Channel PUCCH Physical Uplink Control Channel PUSCH Physical Uplink Shared Channel RACH Random Access Channel RF Radio Frequency RNTI Radio Netw
29、ork Temporary Identifier SCH Shared Channel SI System InformationSPS Semi-Persistent Scheduling SRS Sounding Reference Signal TPC Transmit Power Control UL Uplink 4 Services and functions of the physical layer 4.1 General The physical layer offers data transport services to higher layers. The access
30、 to these services is through the use of transport channels via the MAC sub-layer. A transport block is defined as the data delivered by MAC layer to the physical layer and vice versa. 4.2 Overview of L1 functions As mentioned in 2, TS 38.201, the physical layer is expected to perform the following
31、functions to provide the data transport service: - Error detection on the transport channel and indication to higher layers; - FEC encoding/decoding of the transport channel; - Hybrid ARQ soft-combining; - Rate matching of the coded transport channel to physical channels; - Mapping of the coded tran
32、sport channel onto physical channels; - Power weighting of physical channels; - Modulation and demodulation of physical channels; - Frequency and time synchronisation; - Radio characteristics measurements and indication to higher layers; - Multiple Input Multiple Output (MIMO) antenna processing; -
33、RF processing. L1 functions are modelled for each transport channel in subclause 5. 5 Model of physical layer of the UE The 5G-NR physical-layer model captures those characteristics of the 5G-NR physical-layer that are relevant from the point-of-view of higher layers. More specifically, the physical
34、-layer model captures: - The structure of higher-layer data being passed down to or up from the physical layer; - The means by which higher layers can configure the physical layer; ETSI ETSI TS 138 202 V15.2.0 (2018-07)73GPP TS 38.202 version 15.2.0 Release 15- The different indications (error indic
35、ations, channel-quality indications, etc.) that are provided by the physical layer to higher layers. 5.1 Uplink model 5.1.1 Uplink shared channel The physical-layer model for Uplink Shared Channel transmission is described based on the corresponding PUSCH physical-layer-processing chain, see Figure
36、5.1.1-1. Processing steps that are relevant for the physical-layer model, e.g. in the sense that they are configurable by higher layers, are highlighted in blue. - Higher-layer data passed to/from the physical layer - CRC and transport-block-error indication - FEC and rate matching - Data modulation
37、 - Mapping to physical resource - Multi-antenna processing - Support of L1 control and Hybrid-ARQ-related signalling uni004Duni0041uni0043uni0020uni0073uni0063uni0068uni0065uni0064uni0075uni006Cuni0065uni0072uni0055uni0070uni006Cuni0069uni006Euni006Buni0020uni0074uni0072uni0061uni006Euni0073uni006Du
38、ni0069uni0073uni0073uni0069uni006Funi006Euni0020uni0063uni006Funi006Euni0074uni0072uni006Funi006CFigure 5.1.1-1: Physical-layer model for UL-SCH transmission 5.1.2 Random access channel The physical-layer model for RACH transmission is characterized by a PRACH preamble format that consists of a cycl
39、ic prefix, a preamble, and a guard time during which nothing is transmitted. ETSI ETSI TS 138 202 V15.2.0 (2018-07)83GPP TS 38.202 version 15.2.0 Release 155.2 Downlink model 5.2.1 Downlink shared channel The physical-layer model for Downlink Shared Channel transmission is described based on the cor
40、responding PDSCH physical-layer-processing chain, see Figure 5.2.1-1. Processing steps that are relevant for the physical-layer model, e.g. in the sense that they are configurable by higher layers, are highlighted in blue. - Higher-layer data passed to/from the physical layer; - CRC and transport-bl
41、ock-error indication; - FEC and rate matching; - Data modulation; - Mapping to physical resource; - Multi-antenna processing; - Support of L1 control and Hybrid-ARQ-related signalling. Figure 5.2.1-1: Physical-layer model for DL-SCH transmission 5.2.2 Broadcast channel The physical-layer model for B
42、CH transmission is characterized by a fixed pre-defined transport format. There is one transport block for the BCH every 80ms. The BCH physical-layer model is described based on the corresponding PBCH physical-layer-processing chain, see Figure 5.2.2-1: - Higher-layer data passed to/from the physica
43、l layer; - CRC and transport-block-error indication; - FEC and rate matching; - Data modulation; ETSI ETSI TS 138 202 V15.2.0 (2018-07)93GPP TS 38.202 version 15.2.0 Release 15- Mapping to physical resource; - Multi-antenna processing. Figure 5.2.2-1: Physical-layer model for BCH transmission 5.2.3
44、Paging channel The physical-layer model for PCH transmission is described based on the corresponding physical-layer-processing chain, see Figure 5.2.3-1. The PCH is carried on PDSCH. Processing steps that are relevant for the physical-layer model, e.g. in the sense that they are configurable by high
45、er layers, are highlighted in blue. - Higher-layer data passed to/from the physical layer; - CRC and transport-block-error indication; - FEC and rate matching; - Data modulation; - Mapping to physical resource; - Multi-antenna processing. ETSI ETSI TS 138 202 V15.2.0 (2018-07)103GPP TS 38.202 versio
46、n 15.2.0 Release 15Figure 5.2.3-1: Physical-layer model for PCH transmission 6 Simultaneous transmission and reception of physical channels and physical signals This clause describes the requirements from the UE to send and receive multiple physical channels and physical signals simultaneously depen
47、ding on the capabilities and service requirements. The following notation is used between both the uplink and downlink subclauses below. - p is the number of uplink carriers configured for the UE on which physical channels can be transmitted - p is the number of uplink carriers configured for the UE
48、 on which SRS can be transmitted - q is the number of downlink carriers configured for the UE - j is the number of cell groups configured for the UE. - k is the number of PUCCH groups configured for the UE. 6.1 Uplink The tables 6.1-1 and 6.1-2 describe the possible combinations of physical channels
49、 and SRS that can be sent in simultaneously in the uplink by one UE. Table 6.1-1 introduces notation for a “Transmission Type“ which represents a physical channel or sounding reference signal, and any associated transport channel. Table 6.1-2 describes the combinations of these “Transmission Types“ which are supported by the UE depending on capabilities, and enumerates how many of each can be transmitted simultaneously. ETSI ETSI TS 138 202 V15.2.0 (2018-07)113GPP TS 38.202 version 15.2.0 Release 15Table 6.1-1: Uplink “Transmission Types“ “Transmissi
