NR V2X Demodulation Performance Test Parameters
Explore the detailed parameters for NR V2X demodulation performance tests, including assumptions, test configurations, and recommended workflows. Topics cover CFO estimation, channel estimation, sub-channel sizes, periodicity options, DMRS patterns, propagation conditions, and beta values for SCI. Additional tests for different modulations are also introduced for varied relative velocities.
Download Presentation
Please find below an Image/Link to download the presentation.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author. If you encounter any issues during the download, it is possible that the publisher has removed the file from their server.
You are allowed to download the files provided on this website for personal or commercial use, subject to the condition that they are used lawfully. All files are the property of their respective owners.
The content on the website is provided AS IS for your information and personal use only. It may not be sold, licensed, or shared on other websites without obtaining consent from the author.
E N D
Presentation Transcript
3GPP TSG-RAN WG4 Meeting #97-e Electronic Meeting, 2 13 Nov., 2020 Agenda Item: 7.3.7.1 R4-20xxxxx WF on single link tests for NR V2X demodulation performance LG Electronics
Reference receiver Common assumptions for reference receiver CFO estimation: Cross-DMRS symbol CFO estimation. CE channel estimation: Frequency domain interpolation: MMSE interpolation Time domain interpolation: Linear interpolation RX window: CP/2 from GNSS
PSSCH demodulation Test 1: QPSK for 500km/h relative velocity (already agreed the test) Sub-channel size Option 1: 10 PRB sub-channel size and number of allocated sub-channels is FFS (Intel) Option 2: 20 PRB (LG, Qualcomm, CATT, Huawei, MediaTek) Recommended WF : 20 PRB sub-channel based on 10 PRB sub-channel size PSFCH periodicity Option 1: 1 periodicity (Qualcomm, CATT, MediaTek) Option 2: 4 periodicity (LG, Qualcomm, CATT, Intel, Huawei) Recommended WF : need further discussion. Alt. option 2 is configured in this test, and option1 is used for other test (Test 2 or Test 3) DMRS pattern Option 1: {2,4} DMRS symbols when PSFCH periodicity is 4 (Intel) (to reduce option) Option 2: {3,4} DMRS symbols when PSFCH periodicity is 4 (LG, Qualcomm, CATT, Huawei, Intel) Option 3: 3 DMRS symbols when PSFCH periodicity is 1 (MediaTek, Qualcomm, CATT) Recommended WF : depending on decision of PSFCH periodicity Propagation condition Option 1: TDLA30 Option 2: TDLB100 or allocation 3symbol for PSCCH Recommended WF : Option 1 is baseline and companies are encouraged to provide analysis for option 2. Beta value for 2ndstage SCI Beta value = 3.5 and if technical issue will be observed, beta value can be revised in the next meeting.
PSSCH demodulation Additional following test is introduced Option 1: [Test 2] 16QAM for 260km/h relative velocity (Intel, Huawei) Option 2: [Test 3] 64QAM for 30km/h relative velocity (LG, Qualcomm, CATT, MediaTek) Option 3: both option 1 and option 2 (LG, Intel, CATT, Huawei) Recommended WF : if option 1 or option 2 is not decided, option 3 can be considered a compromise option.
PSSCH demodulation Test 2: 16QAM for 260km/h relative velocity If the test is introduced, following parameters should be discussed Sub-channel size Option 1: 10 PRB sub-channel size and number of allocated sub-channels is FFS (Intel) Option 2: 20 PRB (LG, Qualcomm, CATT, Huawei, MediaTek) Recommended WF : 20 PRB sub-channel based on 10 PRB sub-channel size PSFCH periodicity Option 1: 1 periodicity (Qualcomm, CATT, MediaTek) Option 2: 4 periodicity (LG, Qualcomm, CATT, Intel, Huawei) Recommended WF : need further discussion DMRS pattern Option 1: {2,4} DMRS symbols when PSFCH periodicity is 4 (Intel) (to reduce option) Option 2: {2,3} DMRS symbols when PSFCH periodicity is 4 (Qualcomm, CATT, Huawei, Intel, LG) Option 3: 3 DMRS symbols when PSFCH periodicity is 1 (MediaTek, Qualcomm, CATT) Recommended WF : depending on decision of PSFCH periodicity Beta value for 2ndstage SCI Beta value = 5 and if technical issue will be observed, beta value can be revised in the next meeting.
PSSCH demodulation Test 3: 64QAM for 30km/h relative velocity If the test is introduced, following parameters should be discussed Sub-channel size Option 1: 10 PRB (LG, Qualcomm, Huawei) Option 2: 10 PRB sub-channel size and number of allocated sub-channels is FFS (Intel) Option 3: 20 PRB (CATT, Huawei, MediaTek) Recommended WF : 10 PRB sub-channel PSFCH periodicity Option 1: 1 periodicity (Qualcomm, CATT, MediaTek) Option 2: 4 periodicity (LG, Qualcomm, CATT, Intel, Huawei) Recommended WF : need further discussion DMRS pattern Option 1: {2,3} DMRS symbols when PSFCH periodicity is 4 (LG, Huawei) (to reduce option) Option 2: 2 DMRS symbols when PSFCH periodicity is 1 or 4 (Qualcomm, CATT, Huawei, Intel, LG) Option 3: 3 DMRS symbols when PSFCH periodicity is 1 (MediaTek) Recommended WF : depending on decision of PSFCH periodicity Beta value for 2ndstage SCI Beta value = 5 and if technical issue will be observed, beta value can be revised in the next meeting.
PSSCH demodulation Test for 256QAM modulation order Option 1: Define performance requirement (LG, Qualcomm) Applicability rule can be considered if the test is introduced. Option 2: Do not define performance requirement (Intel, Huawei, MediaTek, CATT) Recommended WF : need further discussion Test for gNB based sync Option 1: Define performance requirement with 1300Hz FO and 24Ts TO (CATT, Intel) Option 2: Do not define performance requirement (Qualcomm, Huawei, MediaTek) Recommended WF : need further discussion
PSCCH demodulation Payload size Option 1: 26bit (Intel) Option 2: 24bits (LG, Qualcomm, Huawei, MediaTek, [CATT]) Recommended WF : depending on decision of subchannel size Parameters Option 1 Option 2 note Priority 3 3 Relative velocity 260km/h (TDLA30-1400) 4 is based on 10 PRB subchannel size 2 is based on 20 PRB subchannel size Frequency resource assignment 4 2 Time resource assignment 5 5 Resource reservation period 0 0 DMRS pattern 1 1 2nd-stage SCI format 2 2 Beta_offset indicator 2 2 Number of DMRS port 1 1 Modulation and coding scheme 5 5 Additional MCS table indicator 0 0 PSFCH overhead indication 1 1 Reserved 2 2 Total 26 24
PSBCH demodulation The number of S-SSB per one period Option 1: 1 S-SSB (LG, Qualcomm, CATT, Intel, MediaTek) Option 2: 2 S-SSB (Huawei) Recommended WF : Option 1 is introduced based on majority views Relative velocity 30km/h (TDLA30-180)
PSFCH demodulation Test metric Use ACK/NACK feedback mode and Pr(DTX to ACK)<1% and Pr(ACK miss)<1% for test metric Introduce additional test metric as Pr(NACK to ACK) < 0.1% Option 1: Yes (Qualcomm, CATT, MediaTek) Option 2: No (LG, Intel, Huawei, MediaTek, CATT) Recommended WF : Companies are encouraged to provide simulation results and analysis for Pr(NACK to ACK) performance in the next meeting. The final decision will be made in the next meeting. PSFCH periodicity 1 periodicity Number of cyclic shift pair 1 cyclic shift pair Relative velocity 30km/h (TDLA30-180)
Draft CR Companies volunteering for draft CR are encouraged to provide draft CR for single link tests by referring to the following table in the next RAN4 meeting. Test case Volunteer company Intel LG Electronics Intel CATT MediaTek Note General part PSSCH demodulation test PSCCH demodulation test PSBCH demodulation test PSFCH demodulation test
