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1、R17 RedCap技术,助力5G终端更轻、更简、更优化国际电信联盟(ITU)定义了5G的三大需求,分别是eMBB(增强型移动宽带)、uRLLC(低时延高可靠通信)和mMTC(海量物联网机器类通信)三大应用场景弥补中高速空白n 2018年,R15提供了大幅超越4G体验的5G eMBB能力。n 2020年,R16提供了完整的URLLC能力,使能低时延、高可靠、TSN时间同步网络,为智能制造工厂类业务提供了基于蜂窝技术前所未有的体验。n 2022年,R17完成,为业界带来了基于NR新空口的5G物联网技术RedCap,定义了面向物联网的第一款5G NR终端类型。RedCap定位:相比eMBB、URL
2、LC更轻量级、更低复杂度、更低成本 RedCap意义:大幅降低5G终端模组成本,扩展5G生态系统,推动5G在更多行业的落地和增长。2020.62020.122022.33GPP RAN#90R17 RedCap WI立项3GPP RAN#88R17 RedCap SI立项3GPP RAN#95R17核心标准冻结3GPP RAN#94R18 RedCap演进立项成功2021.63GPP RAN#92R18启动2021.122022 6R17 RedCap冻结(含ASN.1等)R18 RedCap演进WI计划开展时间2022 Q32024 Q2R18 RedCap演进计划冻结时间(含ASN.1等)
3、3GPPCCSA2021.3TC5WG9#113次会议 RedCap关键技术研究报告立项2022.4TC5WG9#118次会议 RedCap关键技术研究报告征求意见稿RedCap标准化,指导5G行业发展2022.12TC5WG9#120次会议 5G轻量化通用模组技术要求立项3GPP即将完成R18功能冻结,CCSA同步进行行标制定2022.6TC5WG9#120次会议 RedCap终端设备技术要求和测试方法立项R17 RedCap典型应用场景RedCap是3GPP R17面向低复杂度5G终端类型的标准,旨在打造轻量级终端,满足中速物联网需求。针对无线传感器、视频监控、可穿戴等业务应用,利用Red
4、Cap,可同时满足业务性能和低成本需求参考比特速率2Mbps,可靠性为99.99%,端到端时延100ms。对于安全类型的传感器,时延需求更低,为5-10ms,电源可持续数年经济型视频,参考比特速率为2-4Mbps,可靠性为99%-99.9%,时延500ms。高端视频,例如用于农业,需要7.5-25Mbps。视频监控的业务模型主要为上行传输 例如:智能手表、可穿戴医疗设备、AR/VR护目镜等。参考比特速率为下行5-50Mbps和上行2-5Mbps,峰值速率下行达到150Mbps,上行达到50Mbp。电源应能持续1-2周工业无线传感器视频监控可穿戴设备R17 RedCap研究内容(1/2)Spec
5、ify support for the following UE complexity reduction features RAN1,RAN2,RAN4:oReduced maximum UE bandwidth:Maximum bandwidth of an FR1 RedCap UE during and after initial access is 20 MHz.Maximum bandwidth of an FR2 RedCap UE during and after initial access is 100 MHz.oReduced minimum number of Rx b
6、ranches:For frequency bands where a legacy NR UE is required to be equipped with a minimum of 2 Rx antenna ports,the minimum number of Rx branches supported by specification for a RedCap UE is 1.The specification also supports 2 Rx branches for a RedCap UE in these bands.For frequency bands where a
7、legacy NR UE(other than 2-Rx vehicular UE)is required to be equipped with a minimum of 4 Rx antenna ports,the minimum number of Rx branches supported by specification for a RedCap UE is 1.The specification also supports 2 Rx branches for a RedCap UE in these bands.The gNB can know the number of Rx b
8、ranches of the UE by MIMO layer reporting.oMaximum number of DL MIMO layers:For a RedCap UE with 1 Rx branch,1 DL MIMO layer is supported.For a RedCap UE with 2 Rx branches,2 DL MIMO layers are supported.oRelaxed maximum modulation order:Support of 256QAM in DL is optional(instead of mandatory)for a
9、n FR1 RedCap UE.No other relaxations of maximum modulation order are specified for a RedCap UE.oDuplex operation:HD-FDD type A with the minimum specification impact(Note that FD-FDD and TDD are also supported.)R17 RedCap研究内容(2/2)终端类型定义:区分RedCap和非RedCap终端,对RedCap接入控制Specify definition of one RedCap U
10、E type including capabilities for RedCap UE identification and for constraining the use of those RedCap capabilities only for RedCap UEs,and preventing RedCap UEs from using capabilities not intended for RedCap UEs including at least carrier aggregation,dual connectivity and wider bandwidths.RAN2,RA
11、N1早期识别:匹配的调度,接入控制Specify functionality that will enable RedCap UEs to be explicitly identifiable to networks through an early indication in Msg1 and/or Msg3,and Msg A if supported,including the ability for the early indication to be configurable by the network.RAN2,RAN1接入控制:降低对传统终端影响Specify a system
12、 information indication to indicate whether a RedCap UE can camp on the cell/frequency or not;The indication is specific to the number of Rx branches of the UE.RAN2,RAN1 Specify support for the Extended DRX enhancements for RedCap UEs RAN2,RAN3,RAN4:Specify support for the RRM measurement relaxation
13、s for neighbouring cells for RedCap devices:for RRC_Idle/Inactive/Connected RAN2,RAN4RedCap技术,促进5G行业应用落地RedCap通过最大带宽缩减(20MHz)、减少收发天线数目(最低1T1R)、降低调制阶数(上下行64QAM)等规格裁减,有效降低复杂度和终端(模组)成本,预期复杂度相比eMBB终端降低约37%60%,芯片设计开发难度大幅下降,在一定程度上降低芯片研发/制造成本RedCap速率方面略优于LTE Cat 4终端,结合5G网络覆盖度以及RedCap终端初始价格的影响,建议产业优先切入RedCa
14、p具备明显优势的领域技术指标NR eMBBNR RedCapLTE Cat 4(标准)LTE Cat 1/1bis带宽(MHz)n28:30 n41:1002020收发天线n28:1T2R n41:2T4R1T2R1T1R1T2R1T1R调制方式256QAM64QAM(256QAM可选)64QAMDL:64QAMUL:16QAM速率(Mbps)FDDDL:350UL:175DLULDLULDL:150UL:75DL:10UL:5TDD注DL:1700UL:250DLULDLULDL:100UL:15DL:7.4UL:1注:NR TDD:7D1S2U,特殊时隙6:4:4;LTE TDD:3D1U
15、,特殊时隙10:2:2数据来源:参见3GPP TR 38.875R18 RedCap研究背景及研究内容背景与需求 场景:FR1 FDD R18 RedCap定位:比R17 RedCap低端,比LPWA高端的物联网终端,例如工业传感器,峰值速率10Mbps研究内容Further reduced UE complexity in FR1 RAN1,RAN2,RAN4UE BB bandwidth reduction5 MHz BB bandwidth only for PDSCH(for both unicast and broadcast)and PUSCH,with 20 MHz RF ban
16、dwidth for UL and DLThe other physical channels and signals are still allowed to use a BWP up to the 20 MHz maximum UE RF+BB bandwidthSupport additional separate early indication(s)RAN1,RAN2UE peak data rate reductionRelaxation of the constraint(vLayersQmf 4)for peak data rate reductionThe relaxed c
17、onstraint is,e.g.,1(instead of 4)The parameters(vLayers,Qm,f)can be as in Rel-17 RedCapBoth 15 kHz SCS and 30 kHz SCS are supported.Define at most one Rel-18 RedCap UE type for further UE complexity reduction.RedCap引入5G通用模组,加速5G行业发展2022.6R17 RedCap标准冻结2023Q3-2024H1首批R17 RedCap芯片/模组商用2024H2-2025R17 R
18、edCap终端/模组规模应用2022.Q4R17 RedCap端到端技术试验2025-2026首批R18 RedCap芯片/模组商用2027R18 RedCap终端/模组规模应用应用进程RedCap的产业发展必然经历标准制定、技术验证、芯片产品化、终端/模组商用初期、规模化应用阶段的历程,随着商用进程,功能逐步叠加,性能日趋稳定。预计RedCap引入5G通用模组后,年出货量达千万量级、累计出货量上亿级时,5G通用模组价格有望达到100元级(4G模组出货量达亿级以上,加上对4G芯片的持续优化,Cat4模组已降至70元左右)RedCap+NR其他技术,赋能千行百业叠加NR各类优秀特性(URLLC、
19、节能、覆盖增强、切片、CAG、边缘计算、SUL、5G LAN等),在带宽、时延、可靠性、安全隔离等具备优势,实现对垂直行业的强大赋能RedCap终端能够更好地满足垂直行业需求,在性价比上将比4G终端更具优势,且RedCap终端预期将比4G终端具备更长久的生命周期、更广阔的应用领域降时延降时延lRedCap+URLLC等等l场景:工业传感器等低时延场景降功耗降功耗lRedCap+WUS等等l场景:低功耗场景,如可穿戴强覆盖强覆盖lRedCap+R17覆盖增强覆盖增强/SUL等等l场景:深度覆盖场景差异化管理差异化管理lRedCap+切片、切片、CAG、边缘计算、边缘计算l场景:不同业务需求场景开
20、展技术试验,加速RedCap商用成熟北京实验室覆盖5家网络厂商和4家芯片厂商涵盖基本功能、终端识别、驻留与接入控制、BWP配置、功耗优化等关键技术网络初步具备RedCap能力外场覆盖5家网络厂商和3家芯片厂商涵盖业务性能、移动性、边缘覆盖等方面关键技术网络具备商用条件山东江苏上海浙江湖北2023年是发展初期,预计2024年起逐步起量规模发展面向RedCap商用,构建端网协同测试体系,联合产业在实验室和外场开展全面测试,加速端网互通,提升产业成熟度,助力RedCap商用.RedCap发展与应用建议,多维度推动技术落地发展与应用建议继续完善RedCap国内相关标准的制定,明确具体能力要求,指导产业,加快产业节奏;产业链各环节积极合作,加速产业发展,积极参与技术试验和试点应用,尽快开展RedCap终端与网络的端到端功能/性能验证,结合技术验证,对RedCap引入后网络和用户体验的性能影响加以研究,加快产业成熟;在保障性能的基础上,加快开展进一步降低终端/模组成本的方案研究,助力5G行业化应用落地