1. 3GPP RAN WG1 Chairman Matthew BakerRP
3GPP TSG RAN #59
Vienna, Austria, 26th February – 1st March 2013
Status Report for RAN WG1 to TSG-RAN #59
3GPP RAN WG1 Chairman
Matthew Baker

2. Executive Summary LTE: HSPA :
RAN1#72
28 January – 1 February 2013
St Julian’s, Malta
EF3
RAN #59
26 February – 1 March 2013
Vienna, Austria
LTE:
Very good progress on closing Rel-11 corrections
Steady start to Rel-12 WIs and SIs
HSPA :
Rel-11 specifications stable
Het net study progressing well
Good start to other Rel-12 items
Meeting time:

3. Start of new registration procedure involving signing attendance list
Delegates in RAN1
Start of new registration procedure involving signing attendance list

4. Tdocs submitted to RAN1

5. E-UTRA Maintenance

6. E-UTRA CRs
No Rel-8/9 CRs; 6 Rel-10 CRs.

7. E-UTRA CRs Rel-10 Rel-11 36.211: 2 CRs: 36.213: 4 CRs:
Clarification of CSI RS mapping to resource elements
Correction to CSI Reference Signals
36.213: 4 CRs:
Correction on UE procedure for reporting HARQ-ACK
Corrections for SRS power scaling in UpPTS
Correction on UE-specific RS overhead for deriving CQI when PMI/RI is configured in TM9
CR on UE specific search and Common search space overlap on PDCCH
Rel-11
36.211, , : Single set of CRs covering corrections to Rel-11 features

8. E-UTRA Rel-12

9. New Carrier Type Generally difficult progress PSS/SSS locations:
Some aspects are awaiting feedback from RAN4
Other aspects have widely differing views
PSS/SSS locations:
RAN1 will study further the different alternatives, including studying the benefits of new DMRS patterns on the NCT
Study should at least include macro scenario; reduction of DMRS overhead is out of scope of this study.
Aim to conclude the study by RAN1#73
Note: NCT should be able to be operated on both macro and small cells. Target speeds are same as were assumed for LTE Rel-8.
RRM measurements for NCT
RRM measurements need to be supported on both synchronized and unsynchronized NCT
Further work awaits feedback from RAN4
Synchronized new carriers
No agreements; company contributions submitted to RAN#59
Quasi-co-location: dependent on RAN4
Transmission modes: A TM based on TM10 is supported on NCT
MBMS:
Working assumption: Subject to feasibility with reasonable complexity, MCH should be supported on NCT for UEs that support MCH reception on SCell
RAN2 is asked to study the feasibility and complexity of the relevant RAN2 aspects of supporting MCH on the NCT as an SCell.

10. Further Downlink MIMO Enhancement
Evalution results presented
Working Assumptions:
A new aperiodic PUSCH feedback mode is supported in Rel.12 with following feedback
CQI and rank feedback bit size as in PUSCH Mode 3-1 in Rel 10
A wideband PMI
Per subband PMI(s)
Use Rel 10 W=W1W2 codebook structure for 4 antenna feedback for DMRS based TMs
The following are for further study and evaluation:
Subband size
Detailed W1 and W2 structures
Additional information in the CSI reports for this new feedbsack mode

11. Further Enhancements to LTE TDD for DL-UL Interference Management and Traffic Adaptation
Initial agreement on the scenarios to be supported:
At least the multi-cell scenarios that showed feasibility during study item phase should be supported
Scenario 1: Multiple Femto cells deployed on the same carrier frequency
Scenario 2: Multiple Femto cells deployed on the same carrier frequency and multiple Macro cells deployed on an adjacent carrier frequency where all Macro cells have the same UL-DL configuration and Femto cells can adjust UL-DL configuration
Scenario 3: Multiple outdoor Pico cells deployed on the same carrier frequency
Scenario 4: Multiple outdoor Pico cells deployed on the same carrier frequency and multiple Macro cells deployed on an adjacent carrier frequency where all Macro cells have the same UL-DL configuration and outdoor Pico cells can adjust UL-DL configuration
Take scenarios 3-4 with first priority for further evaluation and design
FFS if other scenarios shall be considered in this work item, e.g. multiple operators deploying small cells with eIMTA operations on adjacent channels, co-channel macro-pico case
Initial consideration of possible interference mitigation schemes and signalling mechanisms

12. Study on Provision of Low-cost MTC UEs
Identification of which channels need to be considered for 20dB link budget extension:
PHICH and PCFICH do not require significant analysis or evaluation
PSS/SSS, PBCH (or equivalent), PRACH, (E)PDCCH/PUCCH (maybe), PDSCH/PUSCH need further evaluation
Identification of which link level solutions may be relevant for each channel
Techniques considered for PSS/SSS, PBCH, PRACH
Evaluation assumptions agreed

13. Study on Small Cell Enhancements – Physical-layer Aspects
Scenarios agreed
LS to other working groups
Note that both RAN1 and RAN2 have considered scenarios for small cell enhancement
Agreements on evaluation assumptions
Inital consideration of higher-order modulation:
LS sent to RAN4 on impairments to be considered
Inital consideration of RS and control signalling overhead reduction, and interference avoidance/coordination techniques

14. Study on 3D-channel model for Elevation Beamforming and FD-MIMO
Agreements on scenarios
Some initial agreements on assumptions

15. Study on LTE Device to Device Proximity Services
Working assumption:
Define general and public safety specific scenarios
General scenarios for in NW coverage
Applicable for both public safety and non-public safety
One additional public safety specific scenario for out of NW coverage and partial NW coverage cases

16. UTRA Maintenance

17. UTRA Maintenance TDD Very stable FDD Rels 99 – 10: Rel-11:
No CRs
Rel-11:
25.211: 1 CR:
UE behaviour when non-time reference cell is out of time window
25.214: 2 CRs:
Correction of HS-DPCCH power offset for four-branch MIMO
Correction to the referenced variable for CELL-FACH enhancement
LS to RAN2: A Multiflow capable UE can indicate through a separate RRC-capability bit if it is capable of supporting STTD simultaneously with Multiflow
LS to RAN3 on how the non-time-reference cell in multiflow can calculate the HS-DPCCH timing – modification to NBAP suggested.
TDD

18. HSPA Rel-12

19. HSPA signalling enhancements for more efficient resource usage for LCR TDD
Agreements:
The number of information bits on HS-SCCH and E-AGCH remains unchanged.
The current CCS field on HS-SCCH indicates the channelization code set information for specific timeslot(s).
The current CRRI field on E-AGCH indicates the code resource related information for specific timeslot(s).
UE reports the capability of whether supporting non-rectangular resource allocation through RRC signaling.
RRC signalling of whether the non-rectangular resource allocation is enabled is introduced on a per UE basis.
Non-rectangular resource allocation can be enabled for UEs in CELL-DCH state only.

20. Study on UMTS Heterogeneous Networks
Evaluation results for co-channel interference considered
Aspects identified for verification for inter-company alignment
Initial consideration of potential solutions for interference issues
Conclusion: For interference mitigation with range extension, further evaluations should focus on the use of advanced receivers including network assistance and restricted transport formats on specific TTIs.
Some updates for TR

21. Study on DCH Enhancements for UMTS
Initial discussion of simulation assumptions and identification of possible enhancements to be studied

22. Study on Scalable UMTS Primary candidate scenarios to be considered:
Stand-alone S-UMTS carrier with reduced bandwidth (½ the legacy carrier bandwidth)
Dual-carrier operation with legacy carrier as the primary carrier and one S-UMTS carrier with reduced bandwidth (½ or ¼ of the legacy carrier bandwidth) as the secondary carrier, and with only one uplink (on primary carrier)
LS sent to RAN4 and GERAN1 on coexistence aspects
Candidate physical layer solutions identified

23. Chairman’s Award for 3GPP Excellence

24. Chairman’s Award Presented to Suzuki Hidetoshi (Panasonic)
In recognition of exceptional work in RAN1, particularly for invaluable efforts in reaching consensus in aspects of EPDCCH design, with grateful thanks on behalf of all companies in RAN1.

25. Future RAN WG1 Planning

26. RAN WG1 Schedule 2013-2014 Tentative Meeting Date Location Host
28 January – 1 February 2013
Malta
EF3
RAN#59
26 February – 1 March 2013
Vienna, Austria
RAN1#72bis
15 – 19 April 2013
Chicago, USA
NAF3
RAN1#73
20 – 24 May 2013
Fukuoka, Japan
JF3
RAN#60
11 – 14 June 2013
Aruba
RAN1#74
19 – 23 August 2013
Barcelona, Spain
RAN#61
3 – 6 September 2013
Porto, Portugal
RAN1#74bis
7 – 11 October 2013
Guangzhou, China
CATT
RAN1#75
11 – 15 November 2013
USA
RAN#62
3 – 6 December 2013
Korea
RAN1#76
10-14 February 2014
Prague, Czech Republic
RAN#63
3 – 6 March 2014
Singapore
RAN1#76bis
31 March – 4 April 2014
Shenzhen, China
ZTE
RAN1#77
19 – 23 May 2014
LGE
RAN#64
10 – 13 June 2014
RAN1#78
18 – 22 August 2014
Dresden, Germany
RAN#65
9 – 12 September 2014
Edinburgh, UK
RAN1#78bis
6 – 10 October 2014
Ljubljana, Slovenia
RAN1#79
17 – 21 November 2014
RAN#66
9 – 12 December 2014 US
Tentative

27. Rel-12 WI/SI management: LTE
Very good progress made with Rel-11 corrections in RAN1#72
All Rel-12 items received at least the amount of time requested
Taking into account expected maintenance work and work for other WGs, RAN1 capacity for Rel-12 work in Q is estimated as 21 time units per meeting on average
Assumes 4 time units per day
Assumes similar usage of parallel sessions as currently, i.e. 2 days with LTE parallel sessions, 3 days with HSPA session in parallel
The flexibility to use additional sessions / evening sessions if needed is left to the discretion of the RAN1 leadership
In Q1, the sum of time budget requests for approved LTE WIs/SIs was 2 units less than the estimated time available in RAN1#72
Very useful for flexibility to maximise productivity
Continue the same principle for subsequent meetings
Hence plan for 19 time units per meeting on average for LTE Rel-12 in Q2 2013
5 more units than in RAN1#72
Additional time needed for existing items should be taken into account when considering starting additional items

28. Rel-12 time budget requests: LTE
For already-approved items, 12 extra time units have been requested compared to RAN1#72
Total request: 26 units (deficit of 7 units)
Not-yet-approved proposals have requested a further 7.5 units (RAN1#72bis) / 9 units (RAN1#73)
Total request including not-yet-approved proposals: units (deficit of units).

29. Rel-12 WI/SI management: HSPA
11 time units per meeting available for Rel-12 HSPA work
In addition to ongoing items, additional work is expected from RAN2-led study on Further EUL Enhancements
Total requested time for approved items: 12.5 units
Deficit of 1.5 units
No spare time for additional HSPA items at present

30. Concluding remarks
RAN1 specs up to and including Rel-10 are very stable
Very good resolution of Rel-11 corrections
Need to continue to be very disciplined about selecting Rel-12 items for approval, in order to avoid overload
Thanks to:
Vice chairmen Charlie Zhang and Satoshi Nagata
Karri Ranta-Aho and Thomas Salzer for chairing HSPA sessions
Patrick Merias for his efficient support
LTE Specification Editors Stefan Parkvall, Brian Classon and Bob Love for huge effort on preparing Rel-11 CRs
Delegates for active and enthusiastic contributions
EF3 for meeting hosting