1. November 2007
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Issues on Superframe Size for Uncompressed Video Traffic]
Date Submitted: [November 10, 2007]
Source: [Wooyong Lee1, Jinkyeong Kim1, Yongsun Kim1, Kyeongpyo Kim1, Hyoungjin Kwon1, Kyungsup Kwak2, Seokho Kim2, Xizhi An2, Saurabh N. Mehta2, Zhiquan Bai2, Sangkyoon Nam2]
Company: [Electronics and Telecommunications Research Institute (ETRI)1, Inha University2]
Address: [ETRI, 161 Gajeong-dong, Yuseong-gu, Daejeon, , Republic of Korea]1, [6-141B, Inha University, 253 Yonghyun-dong, Nam-gu, Incheon, , Republic of Kore]2
Voice: [], FAX: [], (other contributors are listed in “Contributors” slides)]
Re: []
Abstract: [Comparison between two different superframe sizes]
Purpose: [To be considered in IEEE c standard]
Notice: This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein.
Release: The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P
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2. Contributors Name E-mail Affiliation Wooyong Lee wylee@etri.re.kr ETRI
November 2007
Contributors
Name
Affiliation
Wooyong Lee
ETRI
Jinkyeong Kim
Yongsun Kim
Kyeongpyo Kim
Hyoungjin Kwon
Kyungsup Kwak
Inha University
Seokho Kim
Xizhi An
Saurabh N. Mehta
Zhiquan Bai
Sangkyoon Nam
ETRI

3. November 2007
Overview
Consider uncompressed video transmission traffic for analysis and simulation
Simulation and analytical results for uncompressed video transmission traffic for different superframe size are given
The significance of beacon period in the superframe is analyzed
Compare two superframe size: 2ms & 1/60s
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4. 802.15.3c Performance Metrics Analysis of 802.15.3c MAC in terms of:
<month year>
doc.: IEEE c
November 2007
c Performance Metrics
Analysis of c MAC in terms of:
Throughput and End-to-End Delay for traffic flow of upper layer, especially, Uncompressed Video Transmission
Throughput, measured in terms of bits per second, is the amount of data delivered successfully by the peer MAC-SAP
End-to-End Delay, measured in terms of second, is the amount of time taken for a MAC SDU to be transferred from the MAC-SAP of the transmitter to the peer MAC-SAP of the receiver.
ETRI
<author>, <company>

5. Uncompressed Video Streaming
November 2007
Simulation Model(UM1)
PNC
Control/commands
Beacon
Uncompressed Video Streaming
1080p 30f 20b
DEV-0
DEV 1
LRT(1.530Gbps)
Common mode(48.5Mbps)
Uncompressed Traffic Model :1080p 30f 20b
-2200( )*1125( )*30*20 = Gbps
-CBR traffic -> 44000bit(2200*20) / 29.63us
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6. CoMPA’s Superframe Structure
November 2007
CoMPA’s Superframe Structure
BP: Beacon Period
CAP: Contention Access Period
CTAP: Channel Time Allocation Period
GT: Guard Time
PLCP: Physical Layer Convergence Protocol
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7. Considering Superframe Structure
November 2007
Considering Superframe Structure
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8. Beacon Frame with CTA IE
November 2007
Beacon Frame with CTA IE *
Note 1: It shows the minimal length of beacon frame with CTA IE included.
Note 2: In this example, there is one Channel Time Allocation (CTA) IE that contains one CTA block assigning the channel time for one traffic flow.
* PLCP header (17 octets) = PHY header (5 octets) + MAC header (10 octets) + HCS (2 octets)
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9. Preamble and PLCP Header
November 2007
Parameters Assumed
Use common mode beacon to 47.8 Mbps
Assume error free PHY channel
Set video traffic to CBR traffic mode
One MAC SDU is composed of data bits transmitted in one video line.
Assume no buffer delay due to higher data rate
Assume no propagation delay due to short distance ( < 10 meter).
Consider transmission delay in terms of Overhead & Payload Size
Parameters
Value
Superframe Size
1 msec ~ 64 msec
Beacon Interval
usec
CAP Duration
0 / 200 usec
Guard Time
0.02 usec
SIFS
2.5 usec
Preamble and PLCP Header
8.157 usec
PHY-SAP Rate
1530 Mbps
Payload Size
2 KB ~ 64 KB
Sub-header Size
4 Bytes
ACK Policy
N/A
Aggregation Method
Applied
MAC-SDU Size
5.5 KB
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10. Analytical Analysis(1)
November 2007
Analytical Analysis(1)
Maximum Achievable Throughput (MAC Capacity) Results (When MSDU= Payload Size)
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11. Analytical Analysis(2)
November 2007
Analytical Analysis(2)
Maximum Achievable Throughput (MAC Capacity) Results (When MSDU= Payload Size)
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12. Analytical Analysis(3)
November 2007
Analytical Analysis(3)
Throughput Results (When MSDU = 5.5 KB and with aggregation)
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13. Analytical Analysis(4)
November 2007
Analytical Analysis(4)
Throughput Results (When MSDU = 5.5 KB and with aggregation)
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14. (MAC SDU size = Payload size)
November 2007
Simulation Results (1)
MAC Capacity without CAP
(MAC SDU size = Payload size)
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15. (MAC SDU size = Payload size)
<month year>
doc.: IEEE c
November 2007
Simulation Results (2)
MAC Capacity with CAP
(MAC SDU size = Payload size)
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<author>, <company>

16. Video 1080p 30f 20b 1.485Gbps (MAC SDU = 5.5 KB )
November 2007
Simulation Results (3)
Performance of video transmission, without CAP
Video 1080p 30f 20b 1.485Gbps (MAC SDU = 5.5 KB )
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17. Video 1080p 30f 20b 1.485Gbps (MAC SDU = 5.5 KB )
November 2007
Simulation Results (4)
Performance of video transmission, with CAP
Video 1080p 30f 20b 1.485Gbps (MAC SDU = 5.5 KB )
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18. November 2007
Conclusions
We present the comparison of different superframe sizes in terms of delay and throughput.
Analysis and simulation results show that 1/30(1/60)s is better than 2ms for the uncompressed video transmission in terms of delay and throughput.
It is necessary to increase superframe size and use aggregation method, in order to achieve high throughput.
Minimum data-rate requirement for uncompressed video traffic is Gbps for the given traffic model
With 1530Mbps PHY-SAP it is not possible to transfer the uncompressed video traffic.
For UM1, CAP does not have any significant usage for large superframe size.
In the small superframe, the throughput or efficiency is low due to the expense of beacon period.
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19. November 2007
Appendix
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20. Superframe Size (msec.)
November 2007
Table 1. PHY-SAP Capacity Without CAP (Maximum Achievable Throughput)
Superframe Size (msec.)
Payload Size
(KB)
Given Throughput
PHY-SAP Rate (Gbps) 1 2
0.49
3.03 8
0.788
1.88 16
0.875
1.69 64
0.95
1.56
0.79
1.87
0.88
1.68
0.96
1.54 4
1.86 10
0.5
2.97 20
0.8
1.85
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21. Superframe Size (msec.)
November 2007
Table 2. PHY-SAP Capacity With CAP = 200 usec (Maximum Achievable Throughput)
Superframe Size (msec.)
Payload Size
(KB)
Given Throughput
PHY-SAP Rate (Gbps) 1 2
0.39
3.80 8
0.63
2.35 16
0.69
2.15 64
0.75
1.98
0.44
3.37
0.71
2.09
0.79
1.87
0.86
1.72 4
0.47
3.15
0.78
0.87
1.76
0.91
1.63 10
0.49
3.03
1.90
1.70
0.94
1.57 20
3.00
1.68
0.95
1.56
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22. Superframe Size (msec.)
November 2007
Table 3. PHY-SAP With CAP = 200 usec (When MSDU = 5.5KB and aggregation method)
Superframe Size (msec.)
Payload Size
(KB)
Given Throughput
PHY-SAP Rate (Gbps) 1 2
0.37
4.13
5.5
0.57
2.68 11
0.66
2.30
0.42
3.58
0.65
2.35
0.75
2.02 4
0.45
3.37
0.69
2.20
0.8
1.91 10
0.46
3.26
0.71
2.13
0.82
1.86 20
0.47
3.22
0.72
2.10
0.83
1.84
ETRI

23. Superframe Size (msec.)
November 2007
Table 4. PHY-SAP Without CAP (When MSDU = 5.5KB and aggregation method)
Superframe Size (msec.)
Payload Size
(KB)
Given Throughput
PHY-SAP Rate (Gbps) 1 2
0.47
3.25
5.5
0.72
2.12 11
0.83
1.84
3.22
2.10
0.84
1.82 4
3.20
0.73
2.09
1.81 10
2.08 20
3.19
1.80
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24. Number of MSDUs in CTAP MSDU=5.5KB and PHY-SAP 1530Mbps
November 2007
Number of MSDUs in CTAP
MSDU=5.5KB and PHY-SAP 1530Mbps
Payload Size
(KB)
Superframe Size (ms) withcap =200 usec 1 2 4 10 20 12 27 59
154
309
5.5 19 44 94
244
494 11 22 50
108
280
568 24 54
116
304
616
Payload Size
(KB)
Superframe Size (ms) without cap 1 2 4 10 20 15 31 62
156
313
5.5 24 49 99
249
499 11 28 56
114
286
574 22 60
124
308
620
Note: One video line duration is 30.9 usec
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25. Number of MSDUs in CTAP MSDU=5.5KB and PHY-SAP 2000Mbps
November 2007
Number of MSDUs in CTAP
MSDU=5.5KB and PHY-SAP 2000Mbps
Payload Size
(KB)
Superframe Size (ms) with cap = 200 usec 1 2 4 10 20 13 31 67
177
351
5.5 23 54
114
302
599 11 28 64
136
358
710 22 68
148
396
776
Payload Size
(KB)
Superframe Size (ms) without cap 1 2 4 10 20 17 35 70
177
354
5.5 29 60
120
302
605 11 34
142
358
718 22 36 76
156
396
792
Note: One video line duration is 30.9 usec
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26. Parameters on Video Resolution
November 2007
Parameters on Video Resolution
Formant
V Freq
HRES
VRES
DE_CNT
DE_LIN
Rate 24bit
Rate 20bit
Hsync (sec)
Vsync (sec)
1080i 30
2200
562/ 563
1920
1080
5760
4800
E-06 /
1080p
1125 60
E-06
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