3GPP TSG-RAN4 Meeting #97-e	R4-2017599
Electronic Meeting, 2nd Nov – 13th Nov, 2020
CR-Form-v12.1	
CHANGE REQUEST	
	
	38.141-1	CR	0158	rev	1	Current version:	16.5.0		
	
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Proposed change affects:	UICC apps		ME		Radio Access Network	x	Core Network		

Title:		CR on UL timing adjustment conducted performance requirement for TS 38.141-1	
		
Source to WG:	Samsung	
Source to TSG:	R4	
		
Work item code:	NR_HST-Perf		Date:	2020-10-21	
					
Category:	B		Release:	Rel-16	
	Use one of the following categories:
F  (correction)
A  (mirror corresponding to a change in an earlier 													release)
B  (addition of feature), 
C  (functional modification of feature)
D  (editorial modification)
Detailed explanations of the above categories can
be found in 3GPP TR 21.900.	Use one of the following releases:
Rel-8	(Release 8)
Rel-9	(Release 9)
Rel-10	(Release 10)
Rel-11	(Release 11)
…
Rel-15	(Release 15)
Rel-16	(Release 16)
Rel-17	(Release 17)
Rel-18	(Release 18)	
		
Reason for change:	UL timing adjustment requirement have been introduced for NR HST in Rel-16. Additional scenario X for UL timing adjustment have been agreed to be introduced	
		
Summary of change:	Add the applicability rule for UL timing adjustment requirement for different scenarios in section 8.1.2.1.6
Add the requirement of UL timing adjustment scenario X
Add the scenario X for moving propation in Annex G.4
Update the requirement based on the latest simulation summary	
		
Consequences if not approved:	Ul timing adjustment can not be verified correctly	
		
Clauses affected:	8.1.2.1.6, 8.2.5 and G.4	
		
	Y	N			
Other specs		X	 Other core specifications		TS/TR ... CR ... 	
affected:	X		 Test specifications	TS 38.141-2	
(show related CRs)		X	 O&M Specifications	TS/TR … CR … 	
		
Other comments:		
		
This CR’s revision history:		

<Start of change 1>
8.1.2.1.5	Applicability of requirements for TDD with different UL-DL patterns
8.1.2.1.6	Applicability of UL timing adjustment requirements for different scenarios
Unless otherwise stated, the tests for UL timing adjustment for scenario Y and scenario Z shall apply only if high speed train is declared to be supported (see D.109 in table 4.6-1). A BS that passes the tests for scenario Y or scenario Z, can also consider the tests for scenario X passed.
<End of change 1>
<Start of change 2>
8.2.5	Performance requirements for UL timing adjustment
8.2.5.1	Definition and applicability
The performance requirement of UL timing adjustment is determined by a minimum required throughput measured for the moving UE at given SNR. The performance requirements assume HARQ retransmissions. The performance requirements for UL timing adjustment scenario Y and scenario Z defined in Annex G.4 are optional.
In the tests for UL timing adjustment, two signals are configured, one being transmitted by a moving UE and the other being transmitted by a stationary UE. The transmission of SRS from UE is optional. FRC parameters in Table A.4-2B are applied for both UEs. The received power for both UEs is the same. The resource blocks allocated for both UEs are consecutive. In Scenario Y and Scenario Z, Doppler shift is not taken into account.
Which specific test(s) are applicable to BS is based on the test applicability rules defined in clause 8.1.2.1.
8.2.5.2	Minimum Requirement
The minimum requirement is in TS 38.104 [2] clause 8.2.5.
8.2.5.3	Test Purpose
The test shall verify the receiver's ability to achieve throughput measured for the moving UE at given SNR under moving propagation conditions.
8.2.5.4	Method of test
8.2.5.4.1	Initial Conditions
Test environment: Normal, see annex B.2.
RF channels to be tested: M; see clause 4.9.1.
RF channels to be tested for carrier aggregation: MBW Channel CA; see clause 4.9.1.
8.2.5.4.2	Procedure
1)	Connect the BS tester generating the wanted signal, multipath fading simulators and AWGN generators to all BS antenna connectors for diversity reception via a combining network as shown in annex D.5 and D.6 for BS type 1-C and type 1-H respectively.
2)	Adjust the AWGN generator, according to combination of SCS and channel bandwidth defined in table 8.2.5.4.2-1.
Table 8.2.5.4.2-1: AWGN power level at the BS input
Sub-carrier spacing (kHz)	Channel bandwidth (MHz)	AWGN power level	
15	5	-86.5 dBm / 4.5MHz	
	10	-83.3 dBm / 9.36MHz	
30	10	-86.3 dBm / 8.64MHz	
	40	-77.2 dBm / 38.16MHz	

3)	The characteristics of the wanted signals (transmitted by moving UE) shall be configured according to the corresponding UL reference measurement channel defined in annex A and the test parameters in Table 8.2.5.4.2-2.
Table 8.2.5.4.2-2 Test parameters for testing UL timing adjustment
Parameter	Value	
Transform precoding	Disabled	
Uplink-downlink allocation for TDD	15 kHz SCS:
3D1S1U, S=10D:2G:2U
30 kHz SCS:
7D1S2U, S=6D:4G:4U	
HARQ	Maximum number of HARQ transmissions	4	
	RV sequence	0, 2, 3, 1	
DM-RS	DM-RS configuration type	1	
	DM-RS duration	single-symbol DM-RS	
	Additional DM-RS position	pos2	
	Number of DM-RS CDM group(s) without data	2	
	Ratio of PUSCH EPRE to DM-RS EPRE	-3 dB	
	DM-RS port(s)	{0}	
	DM-RS sequence generation	NID0=0, nSCID =0 for moving UE
NID0=1, nSCID =1 for stationary UE	
Time domain resource assignment	PUSCH mapping type	A, B	
	Allocation length	14 	
Frequency domain resource assignment	RB assignment	5 MHz CBW/15kHz SCS: 12 RB for each UE
10MHz CBW/15kHz SCS: 25 RB for each UE
10MHz CBW/30kHz SCS: 12 RB for each UE 
40MHz CBW/30kHz SCS: 50 RB for each UE	
	Starting PRB index	Moving UE: 0 
Stationary UE: 12 for 5MHz CBW/15kHz SCS,
25 for 10 MHz CBW/15kHz SCS, 12 for 10MHz CBW/30kHz SCS and 50 for 40 MHz CBW/30kHz SCS	
	Frequency hopping	Disabled	
SRS resource allocation	Slots in which sounding RS is transmitted (Note 1)	For FDD: slot #1 in radio frames
For TDD: 
last symbol in slot #3  in radio frames for 15kHz
last symbol in slot #7  in radio frames for 30kHz	
	SRS resource allocation	15 kHz SCS:
C_SRS =5, B_SRS =0, for 20 RB
C_SRS = 11, B_SRS =0, for 40 RB
30 kHz SCS:
C_SRS =5, B_SRS =0, for 20 RB
C_SRS = 21, B_SRS =0, for 80 RB	
NOTE 1:	The transmission of SRS is optional. And the transmission comb and SRS periodic are configured as KTC = 2, and TSRS = 10 respectively.	

4)	The multipath fading emulators shall be configured according to the corresponding channel model defined in annex G.4.
5)	Adjust the equipment so that required SNR specified in Table 8.2.5.5-1 to Table 8.2.5.5-2 is achieved at the BS input for high speed train.
      Ajust the equipment so that required SNR specified in Table 8.2.5.6-1 to Table 8.2.5.6-2 is acehived at the BS input for normal mode.
6)	For each of the reference channels in Table 8.2.5.5-1 to Table 8.2.5.5-2 appliable for the base station, measure the throughput for high speed train.
      For each of the reference channels in Table 8.2.5.6-1 to Table 8.2.5.6-2 appliable for the base station, measure the throughput for normal mode.
8.2.5.5	Test Requirement for High Speed Train
The throughput shall be ≥ 70% of the maximum throughput of the reference measurement channel as specified in annex A for the moving UE at the SNR given in table 8.2.5.5-1 for mapping type A and table 8.2.5.5-2 for mapping type B respectively.
Table 8.2.5.5-1: Test requirements for UL timing adjustment with mapping type A for high speed train
Number of TX antennas	Number of RX antennas	Cyclic prefix	Channel Bandwidth [MHz]	SCS [kHz]	Moving propagation conditions and correlation matrix (Annex G)	FRC
(Annex A)	SNR
[dB]	
			5	15	Scenario Y	G-FR1-A4-31A	[8.5]	
					Scenario Z	G-FR1-A4-31A	[8.6]	
			10	15	Scenario Y	G-FR1-A4-31	8.8	
1	2	Normal			Scenario Z	G-FR1-A4-31	[8.7]	
			10	30	Scenario Y	G-FR1-A4-32A	[8.6]	
					Scenario Z	G-FR1-A4-32A	[8.6]	
			40	30	Scenario Y	G-FR1-A4-32	8.7	
					Scenario Z	G-FR1-A4-32	[8.8]	

Table 8.2.5.5-2: Test requirements for UL timing adjustment with mapping type B for high speed train
Number of TX antennas	Number of RX antennas	Cyclic prefix	Channel Bandwidth [MHz]	SCS [kHz]	Moving propagation conditions and correlation matrix (Annex G)	FRC
(Annex A)	SNR
[dB]	
			5	15	Scenario Y	G-FR1-A4-31A	[8.6]	
					Scenario Z	G-FR1-A4-31A	[8.6]	
			10	15	Scenario Y	G-FR1-A4-31	8.8	
1	2	Normal			Scenario Z	G-FR1-A4-31	[8.8]	
			10	30	Scenario Y	G-FR1-A4-32A	[8.6]	
					Scenario Z	G-FR1-A4-32A	[8.7]	
			40	30	Scenario Y	G-FR1-A4-32	8.7	
					Scenario Z	G-FR1-A4-32	[8.8]	

8.2.5.6	Test Requirement for Normal Mode
The throughput shall be ≥ 70% of the maximum throughput of the reference measurement channel as specified in annex A for the moving UE at the SNR given in table 8.2.5.6-1 for mapping type A and table 8.2.5.6-2 for mapping type B respectively.
Table 8.2.5.6-1: Test requirements for UL timing adjustment with mapping type A
Number of TX antennas	Number of RX antennas	Cyclic prefix	Channel Bandwidth [MHz]	SCS [kHz]	Moving propagation conditions and correlation matrix (Annex G)	FRC
(Annex A)	SNR
[dB]	
			5	15	Scenario X	G-FR1-A4-31A	[11.2]	
1	2	Normal	10	15	Scenario X	G-FR1-A4-31	[11.8]	
			10	30	Scenario X	G-FR1-A4-32A	[11.4]	
			40	30	Scenario X	G-FR1-A4-32	[12.6]	

Table 8.2.5.6-2: Test requirements for UL timing adjustment with mapping type B
Number of TX antennas	Number of RX antennas	Cyclic prefix	Channel Bandwidth [MHz]	SCS [kHz]	Moving propagation conditions and correlation matrix (Annex G)	FRC
(Annex A)	SNR
[dB]	
			5	15	Scenario X	G-FR1-A4-31A	[11.2]	
1	2	Normal	10	15	Scenario X	G-FR1-A4-31	[11.9]	
			10	30	Scenario X	G-FR1-A4-32A	[11.3]	
			40	30	Scenario X	G-FR1-A4-32	[13.0]	

<End of change 2>
<Start of change 3>
G.4	Moving propagation conditions
Figure G.4-1 illustrate the moving propagation conditions for the test of the UL timing adjustment performance. The time difference between the reference timing and the first tap is according Equation (G.4-1). The timing difference between moving UE and stationary UE is equal to Δτ - (TA 31)1664Tc for 15kHz SCS and Δτ - (TA 31)1632Tc for 30kHz SCS. The relative timing among all taps is fixed. The parameters for the moving propagation conditions are shown in Table G.4-1.

Figure G.4-1: Moving propagation conditions
		(G.4-1)
Table G.4-1: Parameters for UL timing adjustment
Parameter	Scenario X	Scenario Y	Scenario Z	
Channel model	Stationary UE: AWGN
Moving UE: TDLC300-400	Stationary UE: AWGN 
Moving UE: AWGN	Sationary UE: AWGN
Moving UE: AWGN	
UE speed	120 km/h	350 km/h	500 km/h	
CP length	Normal	Normal	Normal	
A	15 kHz: 10 ms
30 kHz: 5 ms	15 kHz: 10 ms
30 kHz: 5 ms	15 kHz: 10 ms 
30 kHz: 5 ms 	
Dw	15 kHz: 0.04 s-1
30 kHz: 0.08 s-1	15 kHz: 0.13 s-1
30 kHz: 0.26 s-1	15 kHz: 0.18 s-1
30 kHz: 0.36 s-1	

NOTE:	Doppler shift is not taken into account in UL TA scenario Y and scenario Z.

<End of change 3>