在2019年3月RAN Plenary會議中,由RAN Plenary主席及SA Plenary主席聯合提出建議的R17時程,如下所示:
會議中建議將R17設為15個月的開發時間。依據之前制定的各工作群組進行程序,RAN1預計在2021年第一季完成R17相關技術開發,RAN2則晚一季完成,此時間點即為可宣稱R17技術開發完成。然對應的ASN.1文件則在 2021年第三季凍結(freeze),而RAN4的驗證完成擇定在2022年Q1。雖然這個堤和在2019年6月會議中仍未明確決議此時程規劃,但已隱然成為各公司的共識。
在2019年6月會議中則由全會主席將R17預計相關討論scope整理在RP-191511文件中。重點摘錄如下:
- 提案時程規劃:
- RP#84會期進行提案初步討論,已多數公司意見為主,決定初步項目以及其後續電子郵件討論時程安排。
- RP#85會期依據電子郵件討論結果進行線上working scope討論與修正。
- RP#86正式通過R17的SI與WI。
- 相關技術項目電子郵件討論安排:
- 分為從六月就開始進行以及從九月再開始進行電子郵件討論。
- 本次會議中決定相關技術項目的moderator,協助進行電子郵件討論。
提案相關電子郵件討論可分為下列兩個方向:
- New Features (email discussion start from June):新議題需要較長的收斂時間,因此提早開始進行。
- Continuing enhancement (email discussion start from Sept.):對現在進行中議題的進一步提升方面,則須視目前進行狀況而定;因此等9月全會後依狀況再進行。
預計6月開始進行討論的議題有:
- [NR_Light] (moderator: Ericsson)
- Define use cases and scenarios
- Optimal operation for mid-tier NR devices (e.g MTC, wearables, etc…)
- Coverage recovery for NR-Light devices (needed due to antenna gain loss)
- Includes power saving specific for these devices
- No LPWA, no URLLC-specific enhancements
- [Small_data] (moderator: ZTE)
- Small Data and Inactive Data transmission (both UL and DL)
- No LPWA
- [Sidelink_enh] (moderator: LG, Oppo)
- Includes V2X, Commercial, and Critical Comms, FR2 aspects
- Relay aspects, architecture aspects, related Uu aspects
- Focus on common functions across the key use cases
- Achieve maximum commonality between commercial, V2X, and Critical Communication usage of sidelink while addressing their specific requirements
- Consider spinning off non-sidelink V2X aspects into a separate thread
- [NR_above_52.6 GHz] (inlc 60GHz unlicensed) (moderator: Intel)
- Scoping, including structure of the study to enable waveform decision, and decision cut off point (between waveforms)
- [Multi_SIM] (moderator: Vivo)
- Identify the RAN impact of target use cases until September
- Scoping of WID after September
- [NR_multicast_broadcast] (moderator: Huawei)
- Main drivers: V2X and Public Safety (incl. ‘mixed mode’ from Rel-16 discussions)
- Refer to RP-190717 as a principle
- [Coverage_enh] (moderator: China Telecom)
- Clarify requirements for all relevant scenarios focusing on extreme coverage (not including LPWA). Data rate target FFS.
- Start from Rel-16 email discussion outcome
- Includes both indoor as well as wide area
- [NB_IoT_eMTC_enh] (moderator: Huawei)
- Clarify motivation for further enhancement
- Enhancements motivated by current commercial deployments
預計9月開始進行討論的議題有:
- [IIoT_URLLC_enh] (moderator: Nokia)
- Addressing wider use cases
- [MIMO_enh] (moderator: Samsung)
- Enhancements motivated by current commercial deployments
- Expand use cases
- E.g. Support for cases with high speed mobility, better support for FDD
- [Non_Terrestrial_Networks] (moderator: Thales)
- Goal: scoping of the normative WID. Include NTN-specific positioning
- [IAB_enh] (moderator: Qualcomm)
- Includes duplexing enhancement
- Potentials for network coding
- Mobile IAB
- [Unlicensed_enh] (moderator: Nokia)
- Generic unlicensed operation enhancements not covered by any other item are addressed here
- Unlicensed aspects specific to other items will be addressed by those items
- [Powersaving_enh] (moderator: Mediatek)
- Enhancements for powersaving of smartphones
- Network power saving aspects as a separate sub-discussion
- [RAN_datacollection_enh] (moderator: CMCC)
- Includes SON and MDT
- To start based on Release 16 scope and status (leftovers, etc…)
- Data collection to enable AI is part of this discussion
- [Positioning_enh] (moderator: Qualcomm)
- Factory/campus positioning, IoT, V2X positioning, 3D positioning, cm level accuracy, incl latency and reliability improvements
- NR-U positioning aspects
- Idle and inactive
由此可看出可能的R17技術發展方向。