3GPP是一个成立于1998年12月的标准化组织，目前成员包括来自中、日、韩、欧、美及印度的七个合作伙伴，包括：
欧洲的ETSI（European Telecommunications standards institute，欧洲标准化电信委员会）中国的CCSA（China Communications Standards Association，中国通信标准化协会）北美的ATIS（The Alliance for Telecommunications Industry Solution，世界无线通信解决方案联盟）同时还有超过500多个独立成员，包括网络运营商、终端制造商、芯片制造商、基础制造商以及学术界、政府机构等，简单来说就是好多公司和机构组成了一个为了制定通信标准的组织。就以中国的CCSA为例：中国通信标准化协会于2002年12月18日在北京正式成立。该协会是国内企、事业单位自愿联合组织起来，经业务主管部门批准，国家社团登记管理机关登记，开展通信技术领域标准化活动的非营利性法人社会团体，成员包括像移动、华为、中兴等在标准制定中有话语权的公司和组织。
2、ReleaseRelease是3GPP工作开展的阶段和过程，但并不是串行的，也就是说可能会有多个release同时进行，因为每一个release都要持续很长的时间，包括早期开发、项目建议、可行性研究、技术规范等阶段。随着移动通信的不断发展，每一个release都有不同的研究内容和侧重点。3GPP制定的标准规范以Release作为版本进行管理，从建立之初的R99，之后到R4，再到当前的Release16。工作完成后，相应的Release将被冻结，然后会有相应的标准协议发布。如果没有特殊情况，即使出现问题，冻结的标准也不会改变。协议可以去3GPP网站下载：ftp://ftp.3gpp.org/Specs/
R8和R9是LTE标准，R10和R11是LTE-A标准，R13是LTE-Pro标准，R14主要开展5G系统框架和关键技术研究，R15是第一个版本的5G标准，满足部分5G需求。为了充分利用现有网络设备并降低网络部署成本，R15版本分为早期版本（非独立组网NSA），主要版本（独立组网SA）和延迟版本。R16完成第二个版本的5G标准，满足全部5G需求。
3、TSG3GPP组织结构中，技术方面的工作由技术规范组TSG（Technology Standards Group）完成。目前3GPP包含3个TSG，分别负责不同的部分：
核心网和终端（CT，Core Network and Terminal）系统和业务（SA，Service and System Aspects）无线接入网（RAN，Radio Access Network）每一个TSG又分为很多工作组WG（Work Group），每个WG分别承担不同的具体任务，以RAN为例，分为：RAN WG1（RAN1）：负责物理层RAN WG2（RAN2）：无线层2和层3RAN WG3（RAN3）：无线网络架构和接口RAN WG4（RAN4）：射频和性能RAN WG5（RAN5）：终端一致性测试RAN WG6（RAN6）：GERAN无线协议
我们常说的RAN1 #xx会议，比如RAN1 #86会议，就是3GPP对于RAN1相关内容展开的会议。会议上很多公司和机构就提案内容展开讨论、协商、融合、妥协，最终形成一个提案。如果有时候一次会议无法达成共识，就接着召开第二次，比如在RAN1 #86会议上大家没有达成一致，则继续召开RAN1 #86bis会议，这也就是为什么在3GPP网站上会看到 #86 和 #86b 的原因。RAN每次会议的提案内容可以在这里下载：ftp://ftp.3gpp.org/tsg_ran/，其他的也都可以在3GPP网站上下载。
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4、NR协议簇
spec number
title
notes
TS 38.101
NR; User Equipment (UE) radio transmission and reception
SPECIFICATION WITHDRAWN
TS 38.101-1
NR; User Equipment (UE) radio transmission and reception; Part 1: Range 1 Standalone
TS 38.101-2
NR; User Equipment (UE) radio transmission and reception; Part 2: Range 2 Standalone
TS 38.101-3
NR; User Equipment (UE) radio transmission and reception; Part 3: Range 1 and Range 2 Interworking operation with other radios
TS 38.101-4
NR; User Equipment (UE) radio transmission and reception; Part 4: Performance requirements
TS 38.101-5
NR; User Equipment (UE) radio transmission and reception; Part 5: Satellite access Radio Frequency (RF) and performance requirements
TS 38.104
NR; Base Station (BS) radio transmission and reception
TS 38.106
NR repeater radio transmission and reception
TS 38.108
NR; Satellite Access Node radio transmission and reception
TS 38.113
NR; Base Station (BS) ElectroMagnetic Compatibility (EMC)
TS 38.114
NR; Repeaters ElectroMagnetic Compatibility (EMC)
TS 38.115-1
NR; Repeater conformance testing - Part 1: Conducted conformance testing
TS 38.115-2
NR; Repeater conformance testing - Part 2: Radiated conformance testing
TS 38.124
NR; Electromagnetic compatibility (EMC) requirements for mobile terminals and ancillary equipment
TS 38.133
NR; Requirements for support of radio resource management
TS 38.141
NR; Base Station (BS) conformance testing
SPECIFICATION WITHDRAWN
TS 38.141-1
NR; Base Station (BS) conformance testing Part 1: Conducted conformance testing
TS 38.141-2
NR; Base Station (BS) conformance testing Part 2: Radiated conformance testing
TS 38.151
NR; User Equipment (UE) Multiple Input Multiple Output (MIMO) Over-the-Air (OTA) performance requirements
TS 38.161
NR; User Equipment (UE) TRP (Total Radiated Power) and TRS (Total Radiated Sensitivity) requirements; Range 1 Standalone and Range 1 Interworking operation with other radios
TS 38.171
NR; Requirements for support of Assisted Global Navigation Satellite System (A-GNSS)
TS 38.173
TDD operating band in Band n48
SPECIFICATION WITHDRAWN
TS 38.174
NR; Integrated Access and Backhaul (IAB) radio transmission and reception
TS 38.175
NR; Integrated Access and Backhaul (IAB) Electromagnetic Compatibility (EMC)
TS 38.176-1
NR; Integrated Access and Backhaul (IAB) conformance testing; Part 1: Conducted conformance testing
TS 38.176-2
NR; Integrated Access and Backhaul (IAB) conformance testing; Part 2: Radiated conformance testing
TS 38.181
NR; Satellite Access Node conformance testing
TS 38.201
NR; Physical layer; General description
TS 38.202
NR; Services provided by the physical layer
TS 38.211
NR; Physical channels and modulation
TS 38.212
NR; Multiplexing and channel coding
TS 38.213
NR; Physical layer procedures for control
TS 38.214
NR; Physical layer procedures for data
TS 38.215
NR; Physical layer measurements
TS 38.300
NR; NR and NG-RAN Overall description; Stage-2
TS 38.304
NR; User Equipment (UE) procedures in idle mode and in RRC Inactive state
TS 38.305
NG Radio Access Network (NG-RAN); Stage 2 functional specification of User Equipment (UE) positioning in NG-RAN
TS 38.306
NR; User Equipment (UE) radio access capabilities
TS 38.307
NR; Requirements on User Equipments (UEs) supporting a release-independent frequency band
TS 38.314
NR; Layer 2 measurements
TS 38.321
NR; Medium Access Control (MAC) protocol specification
TS 38.322
NR; Radio Link Control (RLC) protocol specification
TS 38.323
NR; Packet Data Convergence Protocol (PDCP) specification
TS 38.331
NR; Radio Resource Control (RRC); Protocol specification
TS 38.340
NR; Backhaul Adaptation Protocol (BAP) specification
TS 38.351
NR; Sidelink Relay Adaptation Protocol (SRAP) Specification
TS 38.355
NR; Sidelink Positioning Protocol (SLPP); Protocol Specification
TS 38.401
NG-RAN; Architecture description
TS 38.410
NG-RAN; NG general aspects and principles
TS 38.411
NG-RAN; NG layer 1
TS 38.412
NG-RAN; NG signalling transport
TS 38.413
NG-RAN; NG Application Protocol (NGAP)
TS 38.414
NG-RAN; NG data transport
TS 38.415
NG-RAN; PDU session user plane protocol
TS 38.420
NG-RAN; Xn general aspects and principles
TS 38.421
NG-RAN; Xn layer 1
TS 38.422
NG-RAN; Xn signalling transport
TS 38.423
NG-RAN; Xn Application Protocol (XnAP)
TS 38.424
NG-RAN; Xn data transport
TS 38.425
NG-RAN; NR user plane protocol
TS 38.455
NG-RAN; NR Positioning Protocol A (NRPPa)
TS 38.460
NG-RAN; E1 general aspects and principles
TS 38.461
NG-RAN; E1 layer 1
TS 38.462
NG-RAN; E1 signalling transport
TS 38.463
NG-RAN; E1 Application Protocol (E1AP)
TS 38.470
NG-RAN; F1 general aspects and principles
TS 38.471
NG-RAN; F1 layer 1
TS 38.472
NG-RAN; F1 signalling transport
TS 38.473
NG-RAN; F1 Application Protocol (F1AP)
TS 38.474
NG-RAN; F1 data transport
TS 38.475
NG-RAN; F1 interface user plane protocol
SPECIFICATION WITHDRAWN
TS 38.508-1
5GS; User Equipment (UE) conformance specification; Part 1: Common test environment
TS 38.508-2
5GS; User Equipment (UE) conformance specification; Part 2: Common Implementation Conformance Statement (ICS) proforma
TS 38.509
5GS; Special conformance testing functions for User Equipment (UE)
TS 38.521-1
NR; User Equipment (UE) conformance specification; Radio transmission and reception; Part 1: Range 1 standalone
TS 38.521-2
NR; User Equipment (UE) conformance specification; Radio transmission and reception; Part 2: Range 2 standalone
TS 38.521-3
NR; User Equipment (UE) conformance specification; Radio transmission and reception; Part 3: Range 1 and Range 2 Interworking operation with other radios
TS 38.521-4
NR; User Equipment (UE) conformance specification; Radio transmission and reception; Part 4: Performance
TS 38.521-5
NR; User Equipment (UE) conformance specification; Radio transmission and reception; Part 5: Satellite access Radio Frequency (RF) and performance
TS 38.522
NR; User Equipment (UE) conformance specification; Applicability of radio transmission, radio reception and radio resource management test cases
TS 38.523-1
5GS; User Equipment (UE) conformance specification; Part 1: Protocol
TS 38.523-2
5GS; User Equipment (UE) conformance specification; Part 2: Applicability of protocol test cases
TS 38.523-3
5GS; User Equipment (UE) conformance specification; Part 3: Protocol Test Suites
TS 38.533
NR; User Equipment (UE) conformance specification; Radio Resource Management (RRM)
TS 38.551
NR; User Equipment (UE) Multiple Input Multiple Output (MIMO) Over-the-Air (OTA) performance; Conformance testing
TS 38.561
UE TRP (Total Radiated Power) and TRS (Total Radiated Sensitivity) requirements and test methodologies for FR1 (NR SA and EN-DC); User Equipment (UE) conformance specification
TR 38.716-01-01
NR intra band Carrier Aggregation (CA) Rel-16 for xCC Down Link (DL) / yCC Up Link (UL) including contiguous and non-contiguous spectrum (x >= y)
TR 38.716-02-00
NR inter-band Carrier Aggregation (CA) / Dual Connectivity (DC) Rel-16 for 2 bands Down Link (DL) / x bands Up Link (UL) (x = 1, 2)
TR 38.716-03-01
NR inter-band Carrier Aggregation (CA) / Dual Connectivity (DC) Rel-16 for 3 bands Down Link (DL) / 1 bands Up Link (UL)
TR 38.716-03-02
NR inter-band Carrier Aggregation (CA) / Dual Connectivity (DC) Rel-16 for 3 bands Down Link (DL) / 2 bands Up Link (UL)
TR 38.716-04-01
NR inter-band Carrier Aggregation (CA) Rel-16 for 4 bands Down Link (DL) / 1 bands Up Link (UL)
TR 38.717-01-01
Rel-17 NR intra band Carrier Aggregation for xCC DL/yCC UL including contiguous and non-contiguous spectrum (x>=y)
TR 38.717-02-01
Rel-17 NR Inter-band Carrier Aggregation/Dual Connectivity for 2 bands DL with x bands UL (x=1,2)
TR 38.717-03-01
Rel-17 NR inter-band Carrier Aggregation for 3 bands DL with 1 band UL
TR 38.717-03-02
Rel-17 NR inter-band Carrier Aggregation/Dual Connectivity for 3 bands DL with 2 bands UL
TR 38.717-04-01
Rel-17 NR inter-band Carrier Aggregation for 4 bands DL with 1 band UL
TR 38.717-04-02
Rel-17 NR inter-band Carrier Aggregation/Dual connectivity for DL 4 bands and 2UL bands
TR 38.717-05-01
Rel-17 NR inter-band Carrier Aggregation for 5 bands DL with x bands UL (x=1, 2)
TR 38.718-00-02
NR Carrier Aggregation band combinations with two SUL cells
TR 38.718-01-01
Rel-18 NR intra band Carrier Aggregation for xCC DL/yCC UL including contiguous and non-contiguous spectrum (x>=y)
TR 38.718-02-01
NR inter-band Carrier Aggregation/Dual connectivity for 2 bands DL with x bands UL (x=1,2)
TR 38.718-03-01
NR inter-band Carrier Aggregation/Dual Connectivity for 3 bands DL with x bands UL(x=1,2)
TR 38.785
User Equipment (UE) radio transmission and reception for enhanced NR sidelink
TR 38.786
User Equipment (UE) radio transmission and reception for NR sidelink evolution
TR 38.801
Study on new radio access technology: Radio access architecture and interfaces
TR 38.802
Study on new radio access technology Physical layer aspects
TR 38.803
Study on new radio access technology: Radio Frequency (RF) and co-existence aspects
TR 38.804
Study on new radio access technology Radio interface protocol aspects
TR 38.805
Study on new radio access technology; 60 GHz unlicensed spectrum
TR 38.806
Study of separation of NR Control Plane (CP) and User Plane (UP) for split option 2
TR 38.807
Study on requirements for NR beyond 52.6 GHz
TR 38.808
Study on supporting NR from 52.6 GHz to 71 GHz
TR 38.809
NR; Background for integrated access and backhaul radio transmission and reception
TR 38.810
NR; Study on test methods
TR 38.811
Study on New Radio (NR) to support non-terrestrial networks
TR 38.812
Study on Non-Orthogonal Multiple Access (NOMA) for NR
TR 38.813
New frequency range for NR (3.3-4.2 GHz)
TR 38.814
New frequency range for NR (4.4-5.0 GHz)
TR 38.815
New frequency range for NR (24.25-29.5 GHz)
TR 38.816
Study on Central Unit (CU) - Distributed Unit (DU) lower layer split for NR
TR 38.817-01
General aspects for User Equipment (UE) Radio Frequency (RF) for NR
TR 38.817-02
General aspects for Base Station (BS) Radio Frequency (RF) for NR
TR 38.818
General aspects for Radio Resource Management (RRM) and demodulation for NR
TR 38.819
LTE Band 65 for NR (n65)
TR 38.820
Study on the 7 to 24 GHz frequency range for NR
TR 38.821
Solutions for NR to support Non-Terrestrial Networks (NTN)
TR 38.822
NR; User Equipment (UE) feature list
TR 38.823
Study of further enhancement for disaggregated gNB
TR 38.824
Study on physical layer enhancements for NR ultra-reliable and low latency case (URLLC)
TR 38.825
Study on NR industrial Internet of Things (IoT)
TR 38.826
Study on evaluation for 2 receiver exception in Rel-15 vehicle mounted User Equipment (UE) for NR
TR 38.827
Study on radiated metrics and test methodology for the verification of multi-antenna reception performance of NR User Equipment (UE)
TR 38.828
Cross Link Interference (CLI) handling and Remote Interference Management (RIM) for NR
TR 38.829
Study on Narrow-Band Internet of Things (NB-IoT) / enhanced Machine Type Communication (eMTC) support for Non-Terrestrial Networks (NTN)
SPECIFICATION WITHDRAWN
TR 38.830
Study on NR coverage enhancements
TR 38.831
User Equipment (UE) Radio Frequency (RF) requirements for Frequency Range 2 (FR2)
TR 38.832
NR; Study on enhancement of Radio Access Network (RAN) slicing
TR 38.833
Further enhancement on NR demodulation performance
TR 38.834
Measurements of User Equipment (UE) Over-the-Air (OTA) performance for NR FR1; Total Radiated Power (TRP) and Total Radiated Sensitivity (TRS) test methodology
TR 38.835
Study on XR enhancements for NR
TR 38.836
Study on NR sidelink relay
TR 38.837
UE RF Requirements for Transparent Tx Diversity (TxD) for NR
TR 38.838
Study on XR (Extended Reality) evaluations for NR
TR 38.839
Principles and requirements for simultaneous Rx/Tx band combinations for NR CA/DC, NR SUL and LTE/NR DC
TR 38.840
Study on User Equipment (UE) power saving in NR
TR 38.841
High power UE for NR inter-band Carrier Aggregation with 2 bands downlink and x bands uplink (x =1,2)
TR 38.842
High power User Equipment (UE) (power class 2) for NR inter-band Carrier Aggregation (CA) and Supplementary Uplink (SUL) configurations with x (x>2) bands DL and y (y=1, 2) bands UL
TR 38.843
Study on Artificial Intelligence (AI)/Machine Learning (ML) for NR air interface
TR 38.844
Study on Efficient utilization of licensed spectrum that is not aligned with existing NR channel bandwidth
TR 38.845
Study on scenarios and requirements of in-coverage, partial coverage, and out-of-coverage NR positioning use cases
TR 38.846
Study on simplification of band combination specification
TR 38.847
New frequency range for NR (47.2 – 48.2 GHz)
TR 38.848
Study on Ambient IoT (Internet of Things) in RAN
TR 38.849
Introduction of 6GHz NR unlicensed operation
TR 38.850
Rel-18 High power UE (power class 2) for FR1 NR FDD band in UL of NR inter-band CA/DC combinations with y bands downlink (y=2,3,4,5,6) and x bands uplink (x=1)
TR 38.851
User Equipment (UE) Further enhancements of NR RF requirements for frequency range 2 (FR2)
TR 38.852
Introduction of 1900MHz NR band for Europe for Rail Mobile Radio (RMR)
TR 38.853
Introduction of 900MHz NR band for Europe for Rail Mobile Radio (RMR)
TR 38.854
NR support for high speed train scenario in frequency range 2 (FR2)
TR 38.855
Study on NR positioning support
TR 38.856
Study on local NR positioning in NG-RAN
TR 38.857
Study on NR positioning enhancements
TR 38.858
Study on evolution of NR duplex operation
TR 38.859
Study on expanded and improved NR positioning
TR 38.860
Study on extended 600MHz NR band
TR 38.861
Study on high power UE (power class 2) for one NR FDD band
TR 38.862
Study on band combination handling in RAN4
TR 38.863
Non-terrestrial networks (NTN) related RF and co-existence aspects
TR 38.864
Study on network energy savings for NR
TR 38.865
Study on further NR RedCap UE complexity reduction
TR 38.866
Study on remote interference management for NR
TR 38.867
Study on NR Network-controlled Repeaters
TR 38.868
Study on optimizations of pi/2 BPSK uplink power in NR
TR 38.869
Study on low-power Wake-up Signal and Receiver for NR
TR 38.870
Enhanced Over-the-Air (OTA) test methods for NR FR1 Total Radiated Power (TRP) and Total Radiated Sensitivity (TRS)
TR 38.871
Study on NR frequency range 2 (FR2) Over-the-Air (OTA) testing enhancements
TR 38.872
Study on enhancement for 700/800/900MHz band combinations
TR 38.873
Time Division Duplex (TDD) operating band in Band n48
TR 38.874
NR; Study on integrated access and backhaul
TR 38.875
Study on support of reduced capability NR devices
TR 38.876
Study on Air-to-ground network for NR
TR 38.877
Study on NR mmWave MB-BS
TR 38.878
NR demodulation performance evolution
TR 38.879
Study on enhancement for Resiliency of gNB-CU-CP
TR 38.881
Study on lower MSD for inter-band CA/EN-DC/DC combinations
TR 38.882
Study on requirements and use cases for network verified UE location for Non-Terrestrial-Networks (NTN) in NR
TR 38.883
Study on support of NR downlink 256 Quadrature Amplitude Modulation (QAM) for frequency range 2 (FR2)
TR 38.884
Study on enhanced test methods for Frequency Range 2 (FR2) NR User Equipment (UE)
TR 38.885
Study on NR Vehicle-to-Everything (V2X)
TR 38.886
V2X Services based on NR; User Equipment (UE) radio transmission and reception
TR 38.887
TDD operating band in Band n259
TR 38.888
Adding wider channel bandwidth in NR band n28
TR 38.889
Study on NR-based access to unlicensed spectrum
TR 38.890
Study on NR QoE (Quality of Experience) management and optimizations for diverse services
TR 38.891
User Equipment (UE) Further enhancements of NR RF requirements for frequency range 2 (FR2) for Rel-18
TR 38.892
APT 600 MHz NR band
TR 38.893
Study on UE support of regionally-defined subsets of an NR band
TR 38.894
Requirements for simultaneous Rx/Tx band combinations for NR CA/DC, NR SUL and LTE/NR DC
TR 38.895
High power for FR1 TDD single bands with power class 1.5
TR 38.896
High power for FR1 for FDD single band(s) with power class 2
TR 38.897
High power UE for NR TDD intra-band carrier aggregation in frequency range FR1
TR 38.898
High power UE for FR1 for DC_R18_xBLTE_yBNR_zDLnUL with power class m (x= 1, 2, 3, 4; y=1, 2; m<3)
TR 38.899
High power UE for FR1 NR inter-band CA/DC or NR SUL (supplementary uplink) band combination with y bands downlink (1
TR 38.900
Study on channel model for frequency spectrum above 6 GHz
TR 38.901
Study on channel model for frequencies from 0.5 to 100 GHz
TR 38.903
NR; Derivation of test tolerances and measurement uncertainty for User Equipment (UE) conformance test cases
TR 38.905
NR; Derivation of test points for radio transmission and reception User Equipment (UE) conformance test cases
TR 38.912
Study on New Radio (NR) access technology
TR 38.913
Study on scenarios and requirements for next generation access technologies
TR 38.918
Study on 5G NR User Equipment (UE) full stack testing for Network Slicing
TR 38.921
Study on International Mobile Telecommunications (IMT) parameters for 6.425 - 7.025 GHz, 7.025 - 7.125 GHz and 10.0 - 10.5 GHz
