3GPP R16 Track Report(2)

(continued)

(2) RP-87 items(part 2):

RP-200360(QC): additional eMTC enhancement

RP-200361(QC): additional NB-IoT enhancement

 

RP-200350(E///, CUC): SRVCC to 3G

- Only voice bearer is handed over to target RAT;

- Only handover to UTRA-FDD is supported.

 

​​​​​​​RP-200351(MTK): RACS (UE Radio Capability Signalling) framework and RRC segmentation

RACS用capability ID来表征UE能力，降低信令开销。

R16仅支持下列RRC信令分段：UECapabilityInformation, RRCReconfiguration, and RRCResume。

 

​​​​​​​RP-200335(Nokia): Security and RRC Resume Request

​​​​​​​RP-200357(Nokia): NR IDC(In-Device Coexistence) interference solution

Due to extreme proximity of multiple radio transceivers within the same UE operating on adjacent frequencies or sub-harmonic frequencies, the interference power coming from a transmitter of the collocated radio may be much higher than the actual received power level of the desired signal for a receiver. This situation causes In-Device Coexistence (IDC) interference and is referred to as IDC problems. IDC interfernce problems have been studied for LTE and they may negatively impact radio performance.

 

A similar FDM solution as agreed for LTE is introduced in NR where the UE indicates the affected frequencies to the network.

​​​​​​

RP-200344(CATT): NR UE Power Saving

DCP: DCI with CRC scrambled by PS-RNTI

PS-RNTI: Power Saving RNTI, used to determine if the UE needs to monitor PDCCH on the next occurrence of the connected mode DRX on-duration.

 

RP-200341(CR0194, E///): On-demand SI at RRC_CONNECTED

RP-200341(CR0199, QC): NR operation with Shared Spectrum Access(WLAN?)

RP-200353(Nokia): Non-Public Networks (NPN）

 

​​​​​​​RP-200342(Nokia): 2-step RACH

定义了2种RA过程：4-step RACH with MSG1和2-step RACH with MSGA。2种RA都支持CBRA和CFRA。

2-step RACH定义了MSGA和MSGB：

MSGA: preamble and payload transmissions of the random access procedure for 2-step RA type.

MSGB: response to MSGA in the 2-step random access procedure. MSGB may consist of response(s) for contention resolution, fallback indication(s), and backoff indication.

UE基于网络配置选择RA类型：

1. 未配置CFRA资源时，UE依据RSRP门限来选择2-step或4-step；
2. 如果配置了用于4-step的CFRA资源，UE选择4-step RA；
3. 如果配置了用于2-step的CFRA资源，UE选择2-step RA；

对于CFRA 2-step RA，UE发送MSGA（包含RA preamble和PUSCH payload），在收到MSGB时RA过程结束；

对于CBRA 2-step RA，UE发送MSGA，在收到MSGB且contention resolution成功时RA结束；如果收到MSGB包含Fallback Indication，UE应发送MSG3；如果发送MSG3后contention resolution失败，UE应重复发送MSGA。

UE在2-step RA过程中，如果多次发送MSGA仍不成功，可以尝试4-step RA。

 

​​​​​​​RP-200348(E///): CA/DC enhancement

​​​​​​​RP-200343(HW): NR URLLC enhancement

TODO: need further analysis of 38.211/38.212/38.213/38.214

 

​​​​​​​RP-200340(HW): CLI (Cross Link Interference) management

UL transmission in one cell may interfere with DL reception in another cell, when different TDD DL/UL patterns are used between neighbouring cells. This is referred to as CLI.

即TDD上下行时隙干扰。高层配置UE上报SRS-RSRP或CLI-RSSI来辅助CLI协调。

 

​​​​​​​RP-200352(Nokia): support Industrial IoT

1. Ethernet header compression support is added in sections 4.2 and 6.4.1.
2. New function of MAC to handle prioritization between overlapping resources of a UE is captured in section 6.2.1.
3. Description of downlink and uplink scheduling (sections 10.2, 10.3) are updated to account for support of multiple active SPS and CG configurations for a BWP of a UE.
4. Section 10.3 is updated to describe overlapping grants prioritization functionality.
5. A possibility of configuring restrictive mapping between an LCH and certain CG configurations as well as support for LCH restriction based on an indication in the DCI providing dynamic uplink grant is added in section 16.1.2.
6. PDCP duplication description (section 16.1.3) is updated to account for the possibility to confgure up to 3 secondary RLC entities and support for delivery of up to 4 copies of the same PDCP PDU.
7. Section 16.X is added to describe enhancements related to Time Sensitive Communications support, i.e. accurate reference time information provisioning, TSC Assistance Information provisioning.

RP-200346(LG): 5G V2X with NR Sidelink

RP-200334(E///, QC): Mobility Restriction List propagation

RP-200345(Intel): NR Positioning

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