1. Simulation results for
March 2015
Simulation results for
Box 5 calibration
Date:
Authors:
Name
Affiliations
Address
Phone
Suhwook Kim
LG Electronics
19, Yangjea-daero 11gil, Seocho-gu, Seoul , Korea
Wookbong Lee
Hyeyoung Choi
Jeongki Kim
Kiseon Ryu
HanGyu Cho
Suhwook Kim, LG Electronics

2. Month Year
doc.: IEEE yy/xxxxr0
March 2015
Abstract
This submission provides updated simulation results for Box-5 calibration and reviews our Box-5 calibration work
It clarifies CCA threshold parameter and suggests additional performance metrics
Suhwook Kim, LG Electronics
John Doe, Some Company

3. Box-5 Calibration [1] Box 0, 1, and 2 calibration are almost done
March 2015
Box-5 Calibration [1]
Box 0, 1, and 2 calibration are almost done
Box 3 calibration is now in progress
Box 5 calibration was initially discussed in September meeting
Box 5: Integrated system simulator calibration
The objective is to align a combination of all PHY and MAC features
Suhwook Kim, LG Electronics

4. Box-5 PHY Details [2] March 2015 PHY parametersBW
All BSSs at 5GHz [80 MHz, no dynamic bandwidth]
Channel model
TGac D NLOS per link
Shadow fading
iid log-normal shadowing (5 dB standard deviation) per link
Data Preamble Type
[5GHz, 11ac], always decoded correctly after successful reception, duration is considered.
STA TX Power
15 dBm per antenna 
AP TX Power
20 dBm  per antenna
AP number of TX/RX antennas
1/1
STA number of TX /RX antennas
AP antenna gain
0 dBi
STA antenna gain
-2 dBi
Noise Figure
7dB
CCA threshold
-70dBm (measured across the entire bandwidth after large-scale fading) → -56 dBm
Rx sensitivity
-82dBm (a packet with lower rx power is dropped) → -76 dBm
Link Adaption
Fixed MCS =7 (292.5 Mbps)
Channel estimation
ideal
PHY abstraction
RBIR, BCC [1, 5]
Channel correlation
Independent or time-correlated channel per packet
Suhwook Kim, LG Electronics

5. Box-5 MAC Details [2] March 2015 100 drops per simulation
MAC parameters
Access protocol
[EDCA, AC_BE with default parameters] [CWmin = 15, CWmax = 1023, AIFSn=3 ]
Queue length
A single queue for each traffic link is set inside AP/STA sized of 2000 packets
Traffic type
UDP CBR with rate 10^8bps (may not enough to model full buffer)
MPDU size
1540 Bytes (1472 Data + 28 IP header + 40 MAC header)
Aggregation
[A-MPDU / max aggregation size / BA window size, No A-MSDU, with immediate BA], Max aggregation: 64 MPDUs with 4-byte MPDU delimiter
Max number of retries 10
Beacon
Disabled
RTS/CTS
OFF
Traffic direction
UL Only, DL only
Output metric
-CDF or Histogram of per non-AP STA throughput (received bits/overall simulation time)
-PER of all AP/STA (1 - # of success subframes / # of transmitted subframes)
-Collision probability of all AP/STA ( 1 – # of received ACK frames / # of transmitted data frame)
100 drops per simulation
1 drop = 5 seconds (+ 1 second for initial running)
Suhwook Kim, LG Electronics

6. 11ac Scenario 6 – OBSS Enterprise [2][3]
March 2015
11ac Scenario 6 – OBSS Enterprise [2][3]
Fixed Location and Association
STA1
(5,-9.5)
STA2
(3.5,7.5)
STA4
(-4.5,0.5)
STA5
(-1.5,6)
STA7
(-9,-5)
STA8
(-8.5,8.5)
STA10
(-3,0.5)
STA11
(-0.5,8)
STA13
(-4,-4)
STA14
(7.5,-1)
STA16
(8,-6)
STA17
(0,-7.5)
STA19
(-2.5,-4.5)
STA20
(0.5,-2)
STA22
(0,-4.5)
STA23
(-1.5,7)
STA25
(3.5,-5)
STA26
(9,9.5)
STA28
(-8,-5.5)
STA29
(1.5,3.5)
AP A
(0,0)
AP B
(40,20)
AP C
(-40,-20)
STA3
(7.5+xb, ‑9.5+yb)
STA9
(7+xb, -7.5+yb)
STA15
(3+xb, -0.5+yb)
STA21
(-6.5+xb, -3+yb)
STA27
(‑6+xb, 2.5+yb)
STA6
(-5.5+xc,4.5+yc)
STA12
(7+xc,7+yc)
STA18
(10+xc,0.5+yc)
STA24
(3+xc,2.5+yc)
STA30
(9.5+xc,3.5+yc)
Suhwook Kim, LG Electronics

7. Traffic Flow Model [2][3]
March 2015
Traffic Flow Model [2][3]
DL/UL traffic assigned for each STA
STA DL UL
STA1 y
STA23 n
STA2
STA25
STA4
STA26
STA5
STA28
STA7
STA29
STA8
STA3
STA10
STA9
STA11
STA15
STA13
STA21
STA14
STA27
STA16
STA6
STA17
STA12
STA19
STA18
STA20
STA24
STA22
STA30
Suhwook Kim, LG Electronics

8. History on Box-5 Calibration
March 2015
History on Box-5 Calibration
We have discussed Box-5 calibration from September meeting
Many issues have been agreed and addressed in DCN 1523r5
However, we still found big performance difference among members in January meeting
We found that CCA threshold in PHY parameter table wasn’t clear and then CCA thresholds of each member could be different
Performance metric (throughput) is not enough to calibrate among members
We have to clarify CCA threshold and define additional performance metric to move forward
Suhwook Kim, LG Electronics

9. March 2015
Proposed parameter
We proposed CCA level for following current IEEE spec.
CCA-SD: -76 dBm for 80 MHz (-82 dBm for 20 MHz)
CCA-ED: -56 dBm for 80 MHz (-62 dBm for 20 MHz)
RX sensitivity: -76 dBm for 80 MHz
Suhwook Kim, LG Electronics

10. Proposing metrics PER of all AP/STA
March 2015
Proposing metrics
PER of all AP/STA
Definition
1 – number of success subframes / number of transmitted subframes
It’s useful to analyze detail operation of each channel
Even though two STAs have same throughput, they may have very different PER
Collision probability of all AP/STA
1 – number of received ACK frames / number of transmitted data frame
That equation includes three probabilities
Preamble is failed by channel error → relatively low
Preamble is failed by collision → major part
Preamble is success but all subframes are failed → very low
It’s useful to analyze collision event
Suhwook Kim, LG Electronics

11. One BSS Test Result BSS B (STAs 3, 9, 15, 21, 27)
March 2015
One BSS Test Result
BSS B (STAs 3, 9, 15, 21, 27)
UL only & DL only, UDP CBR with rate 10^8bps
Total Tput
UL: Mbps
DL: Mbps
Suhwook Kim, LG Electronics

12. Collision probability
March 2015
One BSS Test Result
PER & Collision probability
DL only
UL only
PER
[%]
Collision probability
Channel access rate*
[access/sec]
STA3
0.61
0.00
342.0
86.42
68.54
534.9
STA9
0.16
0.03
339.7
81.45
62.85
487.4
STA15
339.8
58.61
35.84
654.5
STA21
0.02
340.2
80.53
57.37
527.8
STA27
339.6
80.82
56.69
577.9
* Channel access rate = # of transmission / simulation time
Suhwook Kim, LG Electronics

13. Three BSSs Test DL only March 2015 BSS B Total Tput: 171.74 Mbps BSS C
BSS A
Total Tput:
25.05 Mbps
Suhwook Kim, LG Electronics

14. Three BSSs Test UL only March 2015 BSS C Total Tput: 99.11 Mbps BSS B
BSS A
Total Tput:
27.78 Mbps
Suhwook Kim, LG Electronics

15. Three BSSs Test Result PER & Collision probability (DL only - BSS A)
March 2015
Three BSSs Test Result
PER & Collision probability (DL only - BSS A)
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA1
66.29
7.61
27.2
STA2
57.79
5.76
22.3
STA4
32.82
2.90
14.6
STA5
39.77
4.77
19.0
STA7
58.04
8.70
22.0
STA8
65.22
7.37
26.8
STA10
18.54
2.61
11.7
STA11
58.39
6.71
23.4
STA13
33.55
6.69
14.3
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA14
57.24
6.10
24.3
STA16
63.24
7.12
25.4
STA17
41.53
7.24
15.8
STA19
23.09
2.98
12.1
STA20
4.00
0.69
9.8
STA25
37.47
4.96
15.0
STA26
69.54
17.68
33.0
STA28
67.53
5.94
29.7
STA29
22.29
4.73
12.2
Suhwook Kim, LG Electronics

16. Collision probability
March 2015
Three BSSs Test Result
PER & Collision probability (DL only - BSS B, BSS C)
PER
[%]
Collision probability
Channel access rate
[access/sec]
BSS B
STA3
31.50
1.59
413.3
STA9
24.33
0.60
376.5
STA15
1.63
0.17
291.5
STA27
17.66
0.82
346.6
BSS C
STA6
17.13
0.68
293.6
STA12
39.06
1.65
395.9
STA18
21.98
1.40
312.4
STA30
37.37
1.78
387.8
Suhwook Kim, LG Electronics

17. Three BSSs Test Result PER & Collision probability (UL only - BSS A)
March 2015
Three BSSs Test Result
PER & Collision probability (UL only - BSS A)
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA1
99.21
90.24
370.9
STA2
95.72
73.79
251.3
STA4
86.14
53.15
271.3
STA5
92.95
63.12
268.9
STA7
98.41
85.74
336.6
STA8
99.66
92.66
329.4
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA22
89.04
55.94
306.9
STA23
95.72
72.65
249.2
STA25
95.81
72.07
305.1
STA26
99.65
93.24
366.7
STA28
98.34
85.16
322.7
STA29
86.41
49.85
317.0
Suhwook Kim, LG Electronics

18. Collision probability
March 2015
Three BSSs Test Result
PER & Collision probability (UL only - BSS B, BSS C)
PER
[%]
Collision probability
Channel access rate
[access/sec]
BSS B
STA3
94.15
77.42
751.6
STA21
74.32
34.81
859.4
STA27
74.30
33.99
894.1
BSS C
STA6
79.97
47.10
756.6
STA24
54.37
19.78
1134.1
STA30
84.67
58.08
590.2
Suhwook Kim, LG Electronics

19. March 2015
Conclusion
In this submission, we provided updated simulation results for Box 5 calibration
We clarified CCA threshold and suggested additional performance metrics for calibration procedure
Suhwook Kim, LG Electronics

20. Reference [1] 11-14/0571r5 Evaluation Methodology
March 2015
Reference
[1] 11-14/0571r5 Evaluation Methodology
[2] 11-14/1177r2 Box5 Calibration Discussion
[3] 11-09/0451r16 TGac Functional Requirements and Evaluation Methodology
[4] 11-14/1523r5 Offline Discussion Minutes of SLS Calibration
Suhwook Kim, LG Electronics

21. March 2015
Backup slides
Suhwook Kim, LG Electronics

22. for previous CCA threshold
March 2015
Simulation results
for previous CCA threshold
(CCA-SD: -82 dBm for 80 MHz,
CCA-ED: -70 dBm for 80 MHz)
Suhwook Kim, LG Electronics

23. One BSS Test Result BSS B (STAs 3, 9, 15, 21, 27)
March 2015
One BSS Test Result
BSS B (STAs 3, 9, 15, 21, 27)
UL only & DL only, UDP CBR with rate 10^8bps
Total Tput
UL: Mbps
DL: Mbps
Suhwook Kim, LG Electronics

24. Comparison DL only March 2015 -76 dBm / -56 dBm -82 dBm / -70 dBm Tput
[Mbps]
PER
[%]
Collision prob.
Channel access rate
[access/sec]
STA3
51.23
0.61
0.00
342.0
51.26
0.60
0.23
339.6
STA9
51.12
0.16
0.03
339.7
51.10
0.15
340.3
STA15
51.22
339.8
51.21
0.01
STA21
51.27
0.02
340.2
51.29
339.5
STA27
51.19
51.18
342.1
BSS B
256.03
1701.3
256.04
Suhwook Kim, LG Electronics

25. Comparison UL only March 2015 -76 dBm / -56 dBm -82 dBm / -70 dBm Tput
[Mbps]
PER
[%]
Collision prob.
Channel access rate
[access/sec]
STA3
10.95
86.42
68.54
534.9
37.59
39.18
35.35
400.3
STA9
13.62
81.45
62.85
487.4
44.76
32.46
30.94
407.4
STA15
40.53
58.61
35.84
654.5
46.04
29.74
29.27
434.8
STA21
15.49
80.53
57.37
527.8
40.83
33.54
32.44
439.7
STA27
16.67
80.82
56.69
577.9
37.66
37.63
34.23
410.0
BSS B
97.26
76.77
55.26
2782.5
206.88
34.39
32.36
2092.2
Suhwook Kim, LG Electronics

26. Collision probability
March 2015
One BSS Test Result
PER & Collision probability
DL only
UL only
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA3
0.60
0.23
339.6
39.18
35.35
400.3
STA9
0.15
0.00
340.3
32.46
30.94
407.4
STA15
0.01
339.8
29.74
29.27
434.8
STA21
339.5
33.54
32.44
439.7
STA27
342.1
37.63
34.23
410.0
Suhwook Kim, LG Electronics

27. Three BSSs Test DL only March 2015 BSS B Total Tput: 131.59 Mbps BSS C
BSS A
Total Tput:
57.30 Mbps
Suhwook Kim, LG Electronics

28. Three BSSs Test UL only March 2015 BSS C Total Tput: 138.58 Mbps BSS B
BSS A
Total Tput:
93.49 Mbps
Suhwook Kim, LG Electronics

29. Comparison DL only March 2015 -76 dBm / -56 dBm -82 dBm / -70 dBm Tput
[Mbps]
PER
[%]
Collision prob.
Channel access rate*
[access/sec]
BSS A
25.05
53.66
7.18
358.7
93.49
18.59
6.51
467.0
BSS B
171.74
20.20
0.86
1427.9
131.59
14.44
1.88
1020.4
BSS C
145.25
30.66
1.42
1389.8
120.43
20.63
3.04
1006.6
Suhwook Kim, LG Electronics

30. Comparison UL only March 2015 -76 dBm / -56 dBm -82 dBm / -70 dBm Tput
[Mbps]
PER
[%]
Collision prob.
Channel access rate*
[access/sec]
BSS A
27.78
95.02
75.03
3696.5
57.30
70.49
39.25
2102.8
BSS B
72.12
80.38
47.23
2505.0
115.29
60.37
23.35
1968.0
BSS C
99.11
70.83
37.19
2480.9
138.58
51.77
21.14
1969.3
Suhwook Kim, LG Electronics

31. Three BSSs Test Result PER & Collision probability (DL only - BSS A)
March 2015
Three BSSs Test Result
PER & Collision probability (DL only - BSS A)
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA1
67.45
8.81
31.3
STA2
73.92
5.72
29.5
STA4
92.98
3.32
22.8
STA5
89.86
4.20
23.6
STA7
80.39
10.43
26.3
STA8
74.89
11.04
28.1
STA10
94.48
1.43
22.3
STA11
76.93
7.94
27.4
STA13
89.17
4.63
23.7
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA14
76.36
6.31
28.4
STA16
74.34
6.86
STA17
80.84
5.97
26.3
STA19
93.46
3.27
22.7
STA20
97.11
0.32
21.9
STA25
88.53
5.33
23.8
STA26
66.43
13.65
31.7
STA28
78.22
9.75
27.3
STA29
97.15
1.83
21.8
Suhwook Kim, LG Electronics

32. Collision probability
March 2015
Three BSSs Test Result
PER & Collision probability (DL only - BSS B, BSS C)
PER
[%]
Collision probability
Channel access rate
[access/sec]
BSS B
STA3
81.17
3.08
268.2
STA9
79.03
2.06
276.9
STA15
97.81
0.11
224.2
STA27
86.92
1.99
251.1
BSS C
STA6
86.63
1.74
230.8
STA12
73.69
3.34
270.8
STA18
86.19
3.06
233.0
STA30
3.82
272.1
Suhwook Kim, LG Electronics

33. Three BSSs Test Result PER & Collision probability (UL only - BSS A)
March 2015
Three BSSs Test Result
PER & Collision probability (UL only - BSS A)
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA1
15.11
51.04
127.9
STA2
25.10
40.67
162.6
STA4
37.07
35.47
222.6
STA5
32.34
35.29
232.9
STA7
20.71
43.86
116.0
STA8
7.43
55.47
97.4
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA22
38.78
34.12
262.7
STA23
26.91
37.65
222.6
STA25
30.39
36.20
224.7
STA26
10.34
56.57
70.4
STA28
16.77
48.61
99.9
STA29
44.26
32.44
263.1
Suhwook Kim, LG Electronics

34. Collision probability
March 2015
Three BSSs Test Result
PER & Collision probability (UL only - BSS B, BSS C)
PER
[%]
Collision probability
Channel access rate
[access/sec]
BSS B
STA3
25.91
28.53
617.7
STA21
45.80
20.93
637.1
STA27
46.19
21.01
713.2
BSS C
STA6
41.62
21.46
732.9
STA24
63.49
17.70
763.7
STA30
35.33
26.27
472.7
Suhwook Kim, LG Electronics

35. Simulation results for BSS A only
March 2015
Simulation results
for BSS A only
(CCA-SD: -76 dBm for 80 MHz,
CCA-ED: -56 dBm for 80 MHz)
Suhwook Kim, LG Electronics

36. March 2015
One BSS Test
BSS A – DL only (18 STAs 1, 2, 4, 5, 7, 8, 10, 11, 13, 14, 16, 17, 19, 20, 25, 26, 28, 29)
Total Tput
DL: Mbps
Suhwook Kim, LG Electronics

37. One BSS Test PER & Collision probability (DL only - BSS A) March 2015
[%]
Collision probability
Channel access rate
[access/sec]
STA1
2.51
0.50
95.6
STA2
0.06
0.04
93.2
STA4
0.03
STA5
0.05
STA7
0.18
0.02
92.9
STA8
5.77
2.76
99.1
STA10
92.7
STA11
0.32
0.01
92.8
STA13
0.00
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA14
0.04
0.01
93.2
STA16
0.12
0.00
93.4
STA17
0.09
0.06
93.6
STA19
0.02
93.5
STA20
STA25
0.17
94.3
STA26
8.99
5.62
102.7
STA28
0.65
94.1
STA29
92.8
Suhwook Kim, LG Electronics

38. March 2015
One BSS Test
BSS A – UL only (12 STAs 1, 2, 4, 5, 7, 8, 22, 23, 25, 26, 28, 29)
Total Tput
UL: Mbps
Suhwook Kim, LG Electronics

39. One BSS Test PER & Collision probability (UL only - BSS A) March 2015
[%]
Collision probability
Channel access rate
[access/sec]
STA1
97.61
84.15
415.5
STA2
92.59
68.50
289.6
STA4
84.43
57.15
243.0
STA5
90.65
65.58
266.9
STA7
96.41
79.56
373.2
STA8
97.55
84.60
371.3
PER
[%]
Collision probability
Channel access rate
[access/sec]
STA22
88.64
61.00
281.5
STA23
92.63
70.56
270.3
STA25
94.40
73.21
296.0
STA26
97.84
85.42
414.3
STA28
96.03
77.59
363.2
STA29
85.92
57.52
243.9
Suhwook Kim, LG Electronics