3GPP TSG RAN WG1 #66 / 100 8 20 100 8 28 100 9 30
3GPP TSG RAN1#66 / EF3 (The European Friends of 3GPP) 2011 8 22 8 26 5 240 ordinary RAN1#66 RAN2#75 RAN3#73 RAN4#60 RAN5#52 (Working Group WG) 2+2+1 7 RAN1 contributions 3 RAN1#66 LTE/LTE-A Rel-10 LTE-A CRs Rel-10 LTE Rel-11 LTE-A WIs/SIs Rel-11 LTE-A WIs/SIs Rel-10 LTE-A 6 functional frozen open issues Specifications maintenance CRs (Change Requests) 32 Rel-10 LTE-A CRs Rel-10 LTE-A Rel-11 LTE-A 2
Rel-11 WIs/SIs 7 3GPP RAN1 (RAN1#66bis) 3 RAN#53 Priority Process WI/SI RAN#53 RAN1 LTE/LTE-A WI/SI (2011/10-2012/03) LTE Carrier Aggregation Enhancements Further Enhanced Non-CA-Based ICIC for LTE Study on Coordinated Multi-Point Operation for LTE Study on Downlink MIMO Enhancement for LTE-Advanced 3GPP LTE-Advanced 3GPP ITU-R IMT-Advanced LTE-Advanced ITU-R 2010 2011 RAN1 LTE-Advanced Release 10 Stage 3 3GPP RAN LTE-Advanced LTE-Advanced 3GPP LTE-Advanced 3GPP LTE Rel-10 PHY Layer Rel-11 3
Rel-10 Enhancement study item SI work item WI Rel-11 4
... 2... 6... 6... 6... 6... 6... 8... 29 5
3GPP TSG RAN1#66 Meeting RAN1 LTE-Advanced Carrier aggregation enhancements Further Enhanced non-ca-based ICIC Corrdinated multi-point operation Downlink MIMO enhancement Enhanced uplink transmission Enhancement to LTE TDD for DL-UL interference management and traffic adaptation LTE/LTE-A Rel-10 LTE-Advanced Rel-11 22 Aug - 26 Aug 2011 Hotel Athenaeum InterContinental (Athens, Greece) RAN1 (22 Aug - 26 Aug 2011): Time schedule Main room Parallel section 1 Parallel section 2 Mon. 09:00 [1], [2], [3], [4], [6.1] NA CoMP offline 6
discussion Tue. 09:00 [Elections], [6.1], [6.5] [6.2], [6.6.2.2] [5.1], [5.5], [5.4] Wed. 09:00 [6.5], [6.7], [6.3] NA [5.2], [5.3] Thu. 09:00 [6.4], [6.6], [6.2] [6.8], [6.3] [5.6], [5.2.5], [5.2.6], [5.2.7] Fri. 09:00 Revisiting: [5], [6.1], [6.2], [6.3], [6.5], [6.6], [6.7] NA NA Tentative Schedule RAN1#66 Monday Tuesday Wednesday Thursday Friday 9 am Coffee 10:30-11:00 Lunch Coffee 16:00-16:30 1, 2, 3 4 LSs 6.1 LTE Maintenance 5.20 pm CoMP offline discn. 6.1 LTE Maint. 6.2 Enh. CA 6.6.2.2 E-PDCCH Elections 6.5 DL CoMP HSPA 5.1 Maint. HSPA 5.5 HSDPA Multipoint HSPA 5.4 Enh. Cell_FACH Ballroom II (Floor -2) 6.5 UL CoMP 6.7 Enh. UL 6.3 F. Enh. ICIC Aphrodite III (Ground floor) HSPA 5.2 UL TxD 5.3 8C- HSDPA 6.4 NetPos Offline Sim AssmptnsHSPA For 5.6 AI6.8.1 UL MIMO 6.6 DL MIMO Enh. 6.2 Enh. CA TDD (Zukang) Athenaeum Conf. Centre (Ground floor) CR drafting Revisiting for 5, 6.1, 6.2, 6.3, UL TxD: 6.5, 6.6, 6.7 and as necessary Tetushi 6.3 Offline Sim. Assmptns 5.2.5, 5.2.6 For 5.2.7. if time. Alignment Of eicic Evals For RAN1 #66bis and 8C-HSDPA Offline Assmptns For DL MIMO SI (Eric) 7
1. EF3 (The European Friends of 3GPP) 240 ( ) ordinary RAN1#66 RAN2#75 RAN3#73 RAN4#60 RAN5#52 (Working Group WG) Number of delegates 350 300 250 200 150 100 50 0 47b 48 48b49 49b50 Start of new registration procedure involving signing attendance list 50b51 51b52 52b53 53b54 54b55 55b56 56b57 57b58 58b59 59b60 2007/01-2011/05 RAN1 240 60b61 61b62 62b63 63bis 6465 66 820 ( ) Rel-11 WIs/SIs Rel-11 / 8
900 800 700 820 Tdocs Number of tdocs 600 500 400 300 200 100 0 47b 48 48b 49 49b 50 62 50b 51 51b 52 52b 53 53b 54 54b 55 55b 56 56b 57 57b 58 58b 59 59b 60 60b 61 61b 2007/01-2011/05 RAN1 62b 63 63bis 64 65 66 / CHTTL ITRI HTC III MediaTek ASUS Acer HT m Moble 8 RAN WGs (RAN1-RAN5) 2 WGs RAN1 UTRA (WCDMA/HSPA) open ( / ) 5 (RAN1#65) Further Enhancements for Cell_FACH (a) Agenda Item 5.2: Uplink Transmit Diversity for HSPA-Closed Loop (b)agenda Item 5.3: 8-Carrier HSDPA (c) Agenda Item 5.4: Further Enhancements for Cell_FACH (d)agenda Item 5.5: Study on HSDPA Multipoint Transmission (e) Agenda Item 5.6: Study on Uplink MIMO for HSPA 9
RAN1#66 LTE/LTE-A Rel-10 LTE-A CRs Rel-10 LTE Rel-11 LTE-A WIs/SIs Rel-11 LTE-A WIs/SIs Rel-10 LTE-A 6 functional frozen open issues Specifications maintenance CRs (Change Requests) 32 Rel-10 LTE-A CRs Rel-10 LTE-A E-UTRA Rel-11 LTE-A open ( / ) Rel-11 7 (a) Agenda Item 6.2: LTE Carrier Aggregation Enhancements (b)agenda Item 6.3: Further Enhanced Non-CA-Based ICIC for LTE (c) Agenda Item 6.4: Network-Based Positioning Support for LTE (d)agenda Item 6.5: Study on Coordinated Multi-Point Operation for LTE (e) Agenda Item 6.6: Study on Downlink MIMO Enhancement for LTE-Advanced (f) Agenda Item 6.7: Study on Enhanced Uplink Transmission for LTE (g)agenda Item 6.8: Study on Further Enhancements to LTE TDD for DL-UL Interference Management and Traffic Adaptation Rel-11 LTE-A Rel-11 WIs/SIs 7 2. Maintenance of E-UTRA Release 8 10: Release 10 TS36.211, TS36.212, TS36.213, TS36.214, TS36.216 10
TS36.211 TS36.212 TS36.213 TS36.214 TS36.216 13 11 41 1 2 5 9 22 0 0 3. Carrier aggregation enhancement: CA Enhancement CA Enhancement trade-off CA Enhancement carrier type Trade-off Analysis method for CA enhancements CA enhancement : R1-112074 Views on trade-off analysis method for CA enhancements Ericsson, ST-Ericsson R1-112405 Proposal for trade-off analysis method for CA enhancements Alcatel-Lucent, Alcatel-Lucent Shanghai Bell, Qualcomm Inc. R1-112537 Tradeoff analysis method for CA enhancements Qualcomm Incorporated R1-112460 Trade-off analysis of CA enhancements for Rel-11 Huawei, Hisilicon trade-off 11
- The proponent of a proposal should provide a trade-off analysis - The trade-off analysis should include a high-level identification of: o applicable scenarios o potential benefits and drawbacks, including complexity, backward compatibility aspects, analysis of existing similar features, energy consumption impact o specification / workload impact analysis on RAN1,2,3,4. Candidate methods for CA enhancements (1) CA (signaling enhancement), (2) PUCCH format 3 format 1b with channel selection transmit diversity (3) TDD configuration (1) UL/DL Signalling Guideline R1-112495 Trade-off Considerations for CA Enhancements Samsung Section 2.1 R1-112152 Consideration of CA Enhancements for Rel-11 Texas Instruments R1-112427 Views on carrier aggregation enhancement for Rel-11 NTT DOCOMO R1-112538 Signalling enhancements for CA Qualcomm Incorporated R1-112638 CA Enhancement on Signalling HTC 12
RAN1 R1-112638 PDCCH R1-112638 PDCCH overhead, Capacity blocking probability - enhancement : o PDCCH capacity for CA-based het-net or inter-band deployments Reduce PDCCH overhead / increase capacity / reduce blocking probability Need to show what gain in capacity and reduction in blocking probability can be achieved with the proposed methods How serious is the problem; what impact would the proposed solution. - Working assumption: Reduction in PDCCH blind decodes below R10 levels is not seen as necessary in the context of this WI. PDCCH coverage enhancement under DL MIMO SI. Consider whether gains resulting from any agreements under DL MIMO SI affect the need for, and improvements from, the above aspects (in order not to duplicate solutions) and vice versa. email reflector DL signalling scenarios and evaluation assumptions DL signaling enhancement 13
(2) PUCCH transmission diversity for PUCCH format 3 and PUCCH format 1b with channel selection: Guidelines and overview R1-112102 Overview and tradeoff analysis for Rel-11 carrier aggregation CATT R1-112078 Enhanced transmit diversity for PUCCH Ericsson, ST-Ericsson R1-112105 Transmit diversity for Format 3 and Format 1b with channel selection CATT R1-112539 PUCCH transmit diversity for Format 3 and Format 1b with Channel selection Qualcomm Incorporated (Physical uplink control channel, PUCCH) PUCCH format 3 PUCCH format 1b with channel selection release 10 Release 10 PUCCH format 3 SORTD Spatial orthogonal transmission diversity UCCH format 1b with channel selection Release 11 PUCCH format 3 SORTD PUCCH format 3 Release 11 PUCCH ( ) - PUCCH overhead as close as possible to single antenna case - Performance significantly improved compared to single antenna and as close as possible SORTD 14
- Minimize the specification impact - Consider cases with and without antenna gain imbalance - Take inter-cell interference into account - Consider both normal and extended CP format 3&1b with channel selection DTX (3) Support of different TDD UL-DL configurations on different bands working item TDD mode CA enb (carrier) (inter band) UL-DL configuration Release 10 TDD CA (intra band) CA Release 11 CA TDD UL-DL configuration release 11 work item R1-112495 Trade-off Considerations for CA Enhancements Samsung Section 2.2 R1-112036 Discussion on different UL-DL configuration for TDD with inter-band CA Huawei, HiSilicon 15
R1-112079 Operating principles of interband TDD CA with different UL-DL configurations Ericsson, ST-Ericsson R1-112214 Supporting Different UL-DL Configurations for LTE-TDD Inter-band Carrier Aggregation Intel Corporation R1-112306 Operation Principles of CC specific TDD Configuration Renesas Mobile Europe Ltd R1-112540 Support of different TDD UL-DL configurations on different bands Qualcomm Incorporated release configuration TDD UL/DL configurations WI TDD UL/DL configurations If Support of different TDD UL-DL configurations on different bands is specified, the UEs will be informed of the actual UL/DL configuration of each aggregated CC. Note that depending on how the Rel-10 signalling is modified, it should be ensured that CCs in the same band have the same configuration. UL-DL configuration full duplex or support simultaneous tx/rx RAN4 - Is cross-carrier scheduling supported? - How many bands are supported? - Are there any restrictions on which combinations of UL-DL configurations can be aggregated? - Is PUCCH still transmitted on only 1 CC? - Is PUCCH always on the PCell? - Is PHICH transmitted on the cell carrying the UL grant? - Same HARQ timing rules as in Rel-10? - Same scheduling timing as in Rel-10? 16
impact TDD - benefits of supporting aggregation of CCs with different UL/DL configurations in different bands with/without simultaneous rx/tx - UE implications for support of simultaneous rx/tx in different bands o Send LS to RAN4 to ask about relevant inter-band spacings (and their priorities) compared to FDD duplex spacings - can simultaneous Tx/Rx be assumed - R1-112823 - for email approval until Friday 2 nd Sept. - total specification complexity with/without half-duplex constraint WI Aim to provide analysis of the motivation/benefits for inter-band aggregation of CCs with different TDD UL-DL configurations, before deciding whether inter-band aggregation of CCs with different TDD UL-DL configurations will be supported in the RAN1 specs in Rel-11. (Note that intra-band aggregated CCs shall have the same TDD UL-DL configuration) (4) (Physical downlink control channel, PDCCH) (Physical uplink control channel, PUCCH) Release 11 17
PDCCH PDCCH LTE-A CA-based het-net inter-band deployments PDCCH PDCCH - Reduce PDCCH overhead - Increase capacity - Reduce blocking probability R1-112076 On PDCCH capacity for CA Ericsson, ST-Ericsson PDCCH CCE CSI-RS UE specific RS DCI format R1-112461 PDCCH enhancement in Rel-11 carrier aggregation HiSilicon Huawei, PDCCH o Methods for PDCCH overhead reduction can be considered in Rel-11 CA. o The multi-cc joint encoded PDCCH can be considered in Rel-11 and the resulting open issues is FFS. o Reducing PDCCH blocking probability can be considered in Rel-11 CA. o The design for E-PDCCH in case of CA should be aligned with that for the CA PDCCH enhancement. PUCCH o Periodic CSI feedback for multiple CC o Support of multiple HARQ-ACK with channel status information 18
Additional carrier types: LTE Release 11 (non-backward compatible) LTE Release 10 study item Release 11 4. CoMP (Coordinated Multipoint transmission/reception): CoMP :(1) CoMP scenario 3 and 4 for simulation assumption and calibration (2) lower capacity/higher latency communication constraints R1-112017/R1-112794email discussion offline discussion DL CoMP release UL CoMP R1-112824 Evaluation results for scenario 3 and 4 (phase 2) phase 2 CoMP CoMP session 19
UL COMP non-comp schemes performance benefits The performance gain factors o coordination area o channel and interference estimation o RS orthogonality and capacity o Timing synchronization o power control mechanism o interference cancellation capability o assumption on joint processing/combining of received signals from multiple points TR For CoMP JR, considerable gain is achievable for scenarios1-4. The evaluation results are captured in the following tables: CoMP Phase 2 CFE (Call For Evaluation) R1-112637 FDD full buffer ULA X-Pol SU-MIMO CoMP JT (joint transmission) spectral efficiency R1-112794 R1-112637 20
CoMP 3 (HetNet) eicic HetNet CoMP JT (joint transmission) 4% 43% ULA ABS eicic ABS eicic CoMP JT CoMP Phase 2 (Scenario 3) ULA Configuration 1 Cell average SE (bps/hz) Cell-edge UE SE (bps/hz) HetNet without eicic(su-mimo) 7.312 0.062 HetNet with eicic(su-mimo) 7.39 0.071 CoMP Scenario3 (JT) (SU-MIMO) 7. 430 0.089 Configuration 4b Cell average SE (bps/hz) Cell-edge UE SE (bps/hz) HetNet without eicic(su-mimo) 8.175 0.074 HetNet with eicic(su-mimo) 8.427 0.079 CoMP Scenario3 (JT) (SU-MIMO) 8.578 0.093 CoMP Phase 2 (Scenario 3) X-Pol 21
Configuration 1 Cell average SE (bps/hz) Cell-edge UE SE (bps/hz) HetNet without eicic(su-mimo) 7.021 0.051 HetNet with eicic(su-mimo) 7.171 0.049 CoMP Scenario3 (JT) (SU-MIMO) 7. 218 0.064 Configuration 4b Cell average SE (bps/hz) Cell-edge UE SE (bps/hz) HetNet without eicic(su-mimo) 7.572 0.064 HetNet with eicic(su-mimo) 7.607 0.069 CoMP Scenario3 (JT) (SU-MIMO) 7.872 0.081 Evaluation of constraints from lower capacity/higher latency communication between transmission points (1) Performance of CoMP schemes relying on spatial information exchange is sensitive to the delay between two transmission points (2) Level of sensitivity depends on the CoMP schemes R1-112339 R1-112391 R1-112260 TR R1-112339 CoMP Performance Evaluation under Low-capacity/High-latency Backhaul LG Electronics R1-112391 CoMP performance in non-ideal backhaul Nokia Siemens Networks, Nokia R1-112852 Proposal for DL CoMP standardization impact Ericsson, Motorola Mobility, Nokia, Nokia Siemens Networks, Qualcomm, ST-Ericsson R1-112829 Way Forward on CoMP Performance Gains Huawei, Orange, CMCC, Telefónica, CATT, CATR, HiSilicon R1-112260 Performance Evaluation of CS/CB and JP with non-zero X2 latency ZTE SI(Study Item) email reflector phase 2 (Scenario 3 and 4) 22
TR36.819 TR36.819 specify support for DL CoMP operation and to investigate the extent to which specified support is needed for UL CoMP. email discussion - what would be required in the RAN1 specifications - which CoMP scheme(s) Nokia Tdoc, R1-112711 Cell aggregation: A unified approach to CoMP and carrier aggregationnokia Siemens Networks, Nokia. Carrier Aggregation Primary Cell anchor transmission point Tdoc CoMP 5. Further enhanced non-ca based ICIC for LTE: WI Rel-11 Qualcomm RAN#51(2011/03) RAN1 RAN1 WI RAN1#66 WI RAN#52 (2011/06) CA based eicic non-ca based eicic scenarios 23
performance requirement 2 UE (scenarios) (e.g., subframe offset / no-subframe offset) PCI (physical cell-id) (MIB/SIB-1/Paging) (including colliding and non-colliding RS, as well as, MBSFN used as ABS, as well as, ABS subframe configurations) (DL) UE / Qualcomm Ericsson 2 WF (way forward) R1-112806 (Qualcomm) CRE bias UE / (Rx-/Tx-based) macro-pico CRE bias (e.g. 15 db) CRE bias (DL) / UE / UE RAN1 / R1-112803 (Ericsson) 24
ITU UMi UMa macro-pico uniform clustered macro 4 pico Macro cell ID pico (random) cell ID bursty (static) ABS (almost blank subframe) serving cell performance requirement PCI system information DL control and data MBSFN almost blank subframe offline discussion R1-112803 R1-112856 TU MODEL SCM tx-based solutions cell range extension (CRE) CRE Pico cell serve Macro Cell UE CRE Macro Cell UE data rate CRS 25
tx-based (RAN1#66bis) / ITU 3GPP (static) (adaptive) ABS Gaussian interference CRE bias R1-112856 (Rx-based) RAN4 (RAN1#66) (RAN1#66bis) (Tx-based) 6. Study on Downlink MIMO Enhancement for LTE-Advanced DL MIMO SI o Real-life DL MIMO o non-uniform DL MIMO Real-life DL MIMO 26
real-life DL MIMO deployment LTE issues Issues o Rank adaptation o Time alignment errors o Antenna calibration and partial reciprocity o Vertical beamforming for dense urban deployments o Specific antenna configurations: cross-polarized; geographically-separated antenna deployments; circular array; o Antenna tilting o UE interference measurements and feedback processing time o Feedback granularity o DL control channel limitations for high numbers of tx antennas issues performance factors release R1-112640 o Time misalignment / antenna calibration o Downlink control signalling enhancement (including UE-specific RS-based) Further discussion required on prioritization o Feedback and related enhancements, including: Interference measurement enhancement Rank reporting Further discussion required on prioritization o CSI accuracy (especially for MU-MIMO) for the high-priority scenarios and antenna configurations. 27
Tdoc o Geographically separated antennas o Power-imbalanced antenna ports o X-pol antenna deployments DL MIMO enhancements for non-uniform networks, low-power nodes and practical antenna configurations DL-MIMO CoMP deployment non-uniform networks lower power nodes practical antenna configurations DL-MIMO scenarios/assumptions CSI feedback DL control signalling scenarios assumptions offline discussion R1-112854 o Scenarios A,C and B are evaluated at least until RAN1#66bis, within which Scenarios A and C have higher priority than Scenario B (refer to motivations in the report). o Discuss further if all these scenarios are needed for evaluation beyond RAN1#66bis non-uniform DL MIMO DL MIMO (scenario) A B C A C B o (Scenario A) Macro cell : Cross-polarized Macro-sites (2Tx, 4Tx) Closely or widely spaced 28
o (Scenario B) Outdoor and/or indoor low-power RRHs, with coordination with the macro High power RRH + low power RRHs o (Scenario C) Outdoor small cell(s) with localized antennas Cross polarized/co-polarized (mainly 4Tx) Uncorrelated (less correlated) Low mobility Operator R1-112854 R1-112437 carrier aggregation MIMO CoMP eicic network positioning LTE-Advanced RAN1 Sis/WIs RAN plenary Rel-11 RAN1 coffee break lunch break offline discussion CA enhancement PUCCH transmission diversity Additional carrier types 29
CoMP CoMP Study Item Working Item TR36.819 CoMP DL MIMO enhancement CoMP CoMP Scenario 4 DL MIMO enhancment Scenario B deployment Further enhanced non-ca based ICIC for LTE operator Rel-11 RAN Plenary #53 (RAN#53) Priority Process Rel-11 WIs/SIs ( LTE HSPA) ( RAN1/2/4) RAN Plenary 9 RAN#53 Priority Process WG (RAN1~RAN5) Rel-11 WIs/SIs Priority Process RAN1 Rel-11 WIs/SIs Rel-11 Rel-11 30
3GPP RAN1 (RAN1#66bis) 3 RAN#53 Priority Process WI/SI RAN#53 RAN1 LTE/LTE-A WI/SI (2011/10-2012/03) LTE Carrier Aggregation Enhancements Further Enhanced Non-CA-Based ICIC for LTE Study on Coordinated Multi-Point Operation for LTE Study on Downlink MIMO Enhancement for LTE-Advanced RAN1 LTE/4G 31