1This week in OCUDU and 3GPP
RedCapMerged changeTS 38.300Rel-17
OCUDU adds RedCap capability, bearer and access changes
OCUDU adds RedCap UE capability handling, specified in TS 38.300 clause 16.13.2, Capabilities. The clause excludes CA, MR-DC, DAPS, CPA, CPC and IAB capabilities for RedCap UEs.
More detail
OCUDU enforces RedCap bearer and sequence-number limits and enables RedCap indication in initial access. We found no specific 3GPP clause for the RedCap bearer and sequence-number limits. We found no specific 3GPP clause for RedCap indication in initial access.
Sources: OCUDU on GitLab: Apply conservative RedCap bearer limits and enable gated access; TS 38.300 clause 16.13.2
RAN pagingMerged changeTS 38.300Rel-17
OCUDU limits RAN paging to cells in the UE's RNA
OCUDU confines RAN paging to cells recommended for the UE's RNA, leaving core-network paging unchanged. TS 38.300 clause 9.2.2.4.2, Network triggered transition from RRC_INACTIVE to RRC_CONNECTED, describes RAN paging within the RNA.
Sources: OCUDU on GitLab: Page only the rna cells on a ran paging; TS 38.300 clause 9.2.2.4.2
Uplink schedulingMerged changeTS 38.300Rel-17
OCUDU adds Configured Grant Type 2 scheduling
OCUDU activates recurring PUSCH allocations with DCI and retries activation when the DCI is missed. TS 38.300 clause 10.3, Uplink Scheduling, specifies Type 2 activation by DCI command.
More detail
That clause permits up to 12 active configured uplink grants per BWP of a serving cell.
Sources: OCUDU on GitLab: [Feat] Add Configured Grant type 2 scheduler (CG type 2 part 4 of 4); TS 38.300 clause 10.3
Positioning2 merged changesTS 38.455TS 38.473Rel-17
OCUDU adds periodic positioning reports over NRPPa and F1AP
OCUDU's CU-CP sends recurring NR AoA measurements through NRPPa. TS 38.455 clause 9.1.1.1, E-CID MEASUREMENT INITIATION REQUEST, lists NR AoA periodicities from 160 ms to 1843200 ms.
More detail
OCUDU's DU reports periodic E-CID measurements, including NR AoA, over F1AP. TS 38.473 clause 9.2.12.20, E-CID MEASUREMENT INITIATION REQUEST, specifies Periodic E-CID report characteristics.
Sources: OCUDU on GitLab: Report nr angle of arrival periodically, Report nr angle of arrival periodically; TS 38.455 clause 9.1.1.1; TS 38.473 clause 9.2.12.20
PHY and fronthaul3 merged changes
OCUDU adds split 6 hooks and eight-layer NR precoding
OCUDU adds MAC/PHY split 6 integration hooks for NVIDIA Aerial's accelerated RAN. OCUDU adds eight-layer NR precoding and shared-memory DPDK ports for O-RAN fronthaul.
More detail
The ports, called net_memif, connect the gNB and RU emulator and handle multi-segment jumbo frames. We found no specific 3GPP clause for MAC/PHY split 6. We found no specific 3GPP clause for eight-layer NR precoding. The fronthaul feature is O-RAN only.
Sources: OCUDU on GitLab: Add functional integration hooks, [PHY] extend precoder to 8 layers, Support DPDK ports that cannot set the MTU size
3GPP contributionsRAN #113RAN1 #126Proposed
DeepSig cites shaping on OCUDU and a modulation benchmark
DeepSig's RP-262161 cites R1-2606690 as reporting a constellation-shaping mode in an open gNB on OCUDU with an OpenAirInterface software UE. DeepSig's R1-2606690 reports a benchmark built on OCUDU that "independently implements all 63 disclosed methods from 17 companies inside one executable NR link".
More detail
DeepSig calls that benchmark the OCUDU AI-RAN open benchmark. DeepSig's RP-262161 was not treated at RP-113, with no decision recorded.
Sources: RP-262161, DeepSig, 3GPP TSG RAN #113. © DeepSig.; R1-2606690, DeepSig, 3GPP TSG RAN WG1 #126. © DeepSig.