March 2003
doc.: IEEE 802.15-03/151r1
Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [TG3a-Wisair-CFP-Presentation]
Date Submitted: [3 March, 2003]
Source: [Gadi Shor] Company: [Wisair]
Address: [24 Raoul Wallenberg st. Ramat Hachayal, Tel-Aviv, ISRAEL]
Voice: [+972-3-7676605] FAX: [+972-3-6477608], E-Mail: [gadi.shor@wisair.com]
Re: [802.15.3a Call for proposal]
Abstract: [Wisair’s presentation for the P802.15.3a PHY standard]
Purpose: [Response to WPAN-802.15.3a Call for Proposals]
Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15.
Submission
Slide 1
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Wisair’s Variable-Pulse-Rate Multi-Band
PHY layer Proposal for TG3a
Gadi Shor, Yaron Knobel, David Yaish,
Sorin Goldenberg, Amir Krause, Erez Wineberger, Rafi Zack,
Benny Blumer, Zeev Rubin, David Meshulam, Amir Freund
Wisair
Submission
Slide 2
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
•
•
•
•
Targets
Main Features
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Self Evaluation
Conclusions
Submission
Slide 3
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Targets
• Proposal for high bit-rate Multi-Band
PHY layer for 802.15.3 MAC
• Support applications with wireless
transmission of Audio/Video and HighRate data communication
• Allow cost effective, low power
implementation on chip
Submission
Slide 4
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
•
•
•
•
Targets
Main Features
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Self Evaluation
Conclusions
Submission
Slide 5
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Main Features
• Variable-Pulse-Rate Multi-band PHY
• Flexible (use 1->14 sub-bands out of 30)
 World-wide regulation
 Co-existence with current and future systems
 Interference mitigation
• Scalable (Variable pulse repetition frequency)
 20 to 1000 Mbps
 Reduced ADC sampling rate at lower Bit-rate
 Power consumption vs. Bit-rate trade off
• Support 802.15.3 MAC without modifications, only
enhancements
• Support all selection criteria
Submission
Slide 6
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
•
•
•
•
Targets
Main Features
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Self Evaluation
Conclusions
Submission
Slide 7
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Variable-Pulse-Rate Multi-Band PHY layer
•
•
•
•
Sub-bands frequency plan
Pulse shape
Operation modes
Variable-Pulse-Rate time-frequency
interleaving sequences
Submission
Slide 8
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Frequency Plan Consideration Points
Consideration points :
• FCC mask
 In band mask – 3.1-10.6 GHz
 Indoor FCC mask require 10db attenuation at 3.1GHz
rejection
 Outdoor FCC mask require 20db attenuation at 3.1GHz
rejection
• 802.11a Frequency range :
 US & Canada: 5.15 - 5.350GHz & 5.725 - 5.825GHz
 Japan: 4.9-5GHz ,5.15 - 5.25GHz
 Europe: 5.15 - 5.35GHz & 5.47 - 5.725GHz
Submission
Slide 9
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Multi-Band Frequency-Plan
• Sub-bands are spaced 470 MHz apart
For
flexible co-existence and simple implementation
• Each sub band is generated by a pulse with 10 dB bandwidth of
~520 MHz

Submission
Supports FCC requirements
Slide 10
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Two overlapping frequency groups (A, B)
•A Second group overlap the first group 235 MHz aside
enhance
system flexibility with respect to co-existence,
interference mitigation and multiple access
Submission
Slide 11
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Upper and Lower Sub-Band Sets
• Each group is divided into lower (sub-bands
1-8) and upper (sub-bands 9-15) sets
• Only 7 sub-bands are used in the lower set
 One sub-band can be avoided for co-existence
• The upper set is used in parallel to the lower
set to increase the bit-rate
 First generation support lower set
 Next generation devices has backward
compatibility
Submission
Slide 12
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Signal spectrum: Group A - Lower Set
(ADS Simulation)
-80
dbm(fs(Vo))
-100
-120
-140
-160
-180
2
3
4
5
6
7
8
9
freq, GHz
• The sub-bands are divided into a lower set (lower
8 sub-bands) and an upper set (higher 7 subbands)
Submission
Slide 13
Gadi Shor, Wisair
March 2003
F#
F1a
F2a
F3a
F4a
F5a
F6a
F7a
F8a
F9a
F10a
F11a
F12a
F13a
F14a
F15a
Co-existence
FC[GHz] FL[GHz]
3.76
4.23
4.7
5.17
5.64
6.11
6.58
7.05
7.52
7.99
8.46
8.93
9.4
9.87
10.34
3.5
3.97
4.44
4.91
5.38
5.85
6.32
6.79
7.26
7.73
8.2
8.67
9.14
9.61
10.08
FH[GHz]
F#
4.02
4.49
4.96
5.43
5.9
6.37
6.84
7.31
7.78
8.25
8.72
9.19
9.66
10.13
10.6
F1b
F2b
F3b
F4b
F5b
F6b
F7b
F8b
F9b
F10b
F11b
F12b
F13b
F14b
F15b
doc.: IEEE 802.15-03/151r1
FC[GHz] FL[GHz]
3.525
3.995
4.465
4.935
5.405
5.875
6.345
6.815
7.285
7.755
8.225
8.695
9.165
9.635
10.105
3.265
3.735
4.205
4.675
5.145
5.615
6.085
6.555
7.025
7.495
7.965
8.435
8.905
9.375
9.845
FH[GHz]
3.785
4.255
4.725
5.195
5.665
6.135
6.605
7.075
7.545
8.015
8.485
8.955
9.425
9.895
10.365
Center
frequencies selected to allow elimination of one sub-band per region
Only 7 sub-bands are used in the lower set according to the region
Submission
Slide 14
Gadi Shor, Wisair
March 2003

Co-existence
doc.: IEEE 802.15-03/151r1
Only 7 sub-bands out of 8 are used in the lower set according to the region
Submission
Slide 15
Gadi Shor, Wisair
March 2003
F#
Co-existence (US)
FC[GHz] FL[GHz]
F1a
F2a
F3a
F4a
F5a
F6a
F7a
F8a
F9a
F10a
F11a
F12a
F13a
F14a
F15a
3.76
4.23
4.7
5.17
5.64
6.11
6.58
7.05
7.52
7.99
8.46
8.93
9.4
9.87
10.34
3.5
3.97
4.44
4.91
5.38
5.85
6.32
6.79
7.26
7.73
8.2
8.67
9.14
9.61
10.08
FH[GHz]
4.02
4.49
4.96
5.43
5.9
6.37
6.84
7.31
7.78
8.25
8.72
9.19
9.66
10.13
10.6
F#
F1b
F2b
F3b
F4b
F5b
F6b
F7b
F8b
F9b
F10b
F11b
F12b
F13b
F14b
F15b
5.15
5.725
doc.: IEEE 802.15-03/151r1
FC[GHz] FL[GHz]
3.525
3.995
4.465
4.935
5.405
5.875
6.345
6.815
7.285
7.755
8.225
8.695
9.165
9.635
10.105
3.265
3.735
4.205
4.675
5.145
5.615
6.085
6.555
7.025
7.495
7.965
8.435
8.905
9.375
9.845
FH[GHz]
3.785
4.255
4.725
5.195
5.665
6.135
6.605
7.075
7.545
8.015
8.485
8.955
9.425
9.895
10.365
5.35
5.825
US
Co existence with 802.11a:
avoid one of the Sub Channels: 4a,5a,5b,6b
Submission
Slide 16
Gadi Shor, Wisair
March 2003

Submission
Co-existence (US)
doc.: IEEE 802.15-03/151r1
Example: Avoid sub band 6b
Slide 17
Gadi Shor, Wisair
March 2003
F#
F1a
F2a
F3a
F4a
F5a
F6a
F7a
F8a
F9a
F10a
F11a
F12a
F13a
F14a
F15a
doc.: IEEE 802.15-03/151r1
Co-existence (Europe)
FC[GHz] FL[GHz] FH[GHz]
3.76
4.23
4.7
5.17
5.64
6.11
6.58
7.05
7.52
7.99
8.46
8.93
9.4
9.87
10.34
3.5
3.97
4.44
4.91
5.38
5.85
6.32
6.79
7.26
7.73
8.2
8.67
9.14
9.61
10.08
F#
4.02
4.49
4.96
5.43 5.15
5.9 5.725
6.37
6.84
7.31
7.78
8.25
8.72
9.19
9.66
10.13
10.6
F1b
F2b
F3b
F4b
F5b
F6b
F7b
F8b
F9b
F10b
F11b
F12b
F13b
F14b
F15b
FC[GHz] FL[GHz] FH[GHz]
3.525
3.995
4.465
4.935
5.405
5.875
6.345
6.815
7.285
7.755
8.225
8.695
9.165
9.635
10.105
3.265
3.735
4.205
4.675
5.145
5.615
6.085
6.555
7.025
7.495
7.965
8.435
8.905
9.375
9.845
3.785
4.255
4.725
5.195
5.665 5.35,5.47
6.135 5.825
6.605
7.075
7.545
8.015
8.485
8.955
9.425
9.895
10.365
Europe
Co existence with 802.11a:
avoid one of the Sub Channels: 4a,5a,5b,6b
Submission
Slide 18
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Co-existence (Europe)

Submission
Example: Avoid sub band 5a
Slide 19
Gadi Shor, Wisair
March 2003
F#
F1a
F2a
F3a
F4a
F5a
F6a
F7a
F8a
F9a
F10a
F11a
F12a
F13a
F14a
F15a
doc.: IEEE 802.15-03/151r1
Co-existence (Japan)
FC[GHz] FL[GHz]
3.76
4.23
4.7
5.17
5.64
6.11
6.58
7.05
7.52
7.99
8.46
8.93
9.4
9.87
10.34
FH[GHz]
3.5
3.97
4.44
4.91
5.38
5.85
6.32
6.79
7.26
7.73
8.2
8.67
9.14
9.61
10.08
F#
4.02
4.49
4.96
5.43 5.15-5.25
5.9
6.37
6.84
7.31
7.78
8.25
8.72
9.19
9.66
10.13
10.6
FC[GHz] FL[GHz]
F1b
F2b
F3b
F4b
F5b
F6b
F7b
F8b
F9b
F10b
F11b
F12b
F13b
F14b
F15b
3.525
3.995
4.465
4.935
5.405
5.875
6.345
6.815
7.285
7.755
8.225
8.695
9.165
9.635
10.105
3.265
3.735
4.205
4.675
5.145
5.615
6.085
6.555
7.025
7.495
7.965
8.435
8.905
9.375
9.845
FH[GHz]
3.785
4.255
4.725
5.195
5.665
6.135
6.605
7.075
7.545
8.015
8.485
8.955
9.425
9.895
10.365
4.9-5
Japan
Co existence with 802.11a:
avoid one of the Sub Channels: 4a,4b
Submission
Slide 20
Gadi Shor, Wisair
March 2003

Submission
doc.: IEEE 802.15-03/151r1
Co-existence (Japan)
Example: Avoid sub band 4a
Slide 21
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Variable-Pulse-Rate Multi-Band
Modulation and Coding Scheme
• The waveform is generated by time interleaving of
pulses from different frequency sub-bands
• Modulation schemes: QPSK and BPSK
• Coding Schemes: Viterbi K=7, Rate ½, ¾
• Three pulse repetition intervals supported to allow
 Reduced ADC sampling rate for improved power
consumption
 Improved multiple access
 Improved ISI mitigation
 Energy collection
Submission
Slide 22
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Variable-Pulse-Rate Multi-Band
•Pulse repetition interval per sub-band is longer than channel response
28 nSec: 7 pulses ~3.9 nSec each with 250 Mpps
56 nSec: 7 pulses ~3.9 nSec each with 125 Mpps
84 nSec: 7 pulses ~3.9 nSec each with 83.3 Mpps
 Reduce sampling rate for reduced bit rates
Submission
Slide 23
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mpps signal example
(ADS simulation)
400
Vo, uV
200
0
-200
-400
0
10
20
30
40
50
60
time, nsec
• Any number of sub-bands (N<=7) can be used
Unused sub-bands are not transmitted
• Example shows 4 sub-bands in use
Submission
Slide 24
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Multi-band signal generation
Data F1A
Da I
Lower Bands Set
PFIa(t)
Data F2A
Da Q
Data
Stream
Scrambling+
Coding +
Interleaving
Stream
DeMultiplexer
+
Inner Coding
Physical
Sub-Bands
Multiplexer
Sub Band
select
Db I
PFQa(t)
Optional Upper Bands
PFIb(t)
Data FnA
Db Q
Sub Band
select
PFQb(t)
•Above 500 Mbps the upper band optional section (Gray
section) may be used to allow up to 1000 Mbps
Submission
Slide 25
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Pulse Shape
RF
QPSK
signal
shape, Pulse-rate=250 Mbps
1
Pulse shape defines the
envelope of the pulse
0.5
0
-0.5
-1
0
4
8
12
16
20
24
28
t [nSec]
RF QPSK signal shape, Pulse-rate=250 Mbps

P  t   sin  2  f env  t   sin 2  f env  12 Tguard
, t  12 Tguard , t  12  1
 Tguard 
 f env

f env  125 MHz, Tguard  0.1 nSec
1
0.5
0
The Envelope spectrum
Power Spectrum Magnitude (dB)
0
-0.5
-1
1
2
3
4
t [nSec]
3.9 nSec
4.0 nSec
Submission
-5
-10
-15
-20
-25
-30
-35
-40
0
0.2
0.4
0.6
0.8
1
Frequency [GHz]
Slide 26
Gadi Shor, Wisair

March 2003
doc.: IEEE 802.15-03/151r1
Operation Modes (7 bands example)
Mode
Modulation Coding
Rate
Pulse Rate
Sub[Mpulse/sec] Band
PRI
[nsec]
Data Rate
[Mbs] -7 bands
example
1
QPSK
1
250
28
500
2
QPSK
¾
250
28
375
3
QPSK
½
250
28
250
4
QPSK
¾
125
56
187.5
5
QPSK
½
125
56
125
6
QPSK
½
83.33
84
83.3
7
BPSK
¾
83.33
84
62.5
8
BPSK
Repetition code
x bands
125
56
17.86
Submission
Slide 27
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Bit rates vs. Number of sub-bands
Sub bands/
Mode
1
2
3
4
5
6
7
8
14
1000
750
500
375
250
166.6
125
17.86
7
500
375
250
187.5
125
83.3
62.5
17.86
6
428.57
321.43
214.29
160.71
107.14
71.40
53.57
17.86
5
357.14
267.86
178.57
133.93
89.29
59.50
44.64
17.86
4
285.71
214.29
142.86
107.14
71.43
47.60
35.71
17.86
3
214.29
160.71
107.14
80.36
53.57
35.70
26.79
17.86
2
142.86
107.14
71.43
53.57
35.71
23.80
17.86
17.86
1
71.43
53.57
35.71
26.79
17.86
11.90
8.93
17.86
• In each operation mode different number of sub-bands can be used
• The table shows Bit-Rates for different number of sub-bands under different
operation modes
• Mode 5 with 7 sub-bands supports 125Mbps (Meets IEEE 110Mpbs requirement)
• Mode 3 with 7 sub-bands supports 250Mbps (Meets IEEE 200Mpbs requirement)
• Mode 1 with 7 sub-bands supports 500Mbps for scalability
• Mode 8 is used for the beacon, same information is transmitted over all sub-bands
Submission
Slide 28
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Time-Frequency interleaving
sequences
• Each piconet uses a different time-frequency
interleaving sequence of length 7
• The “same” sequence is used for the upper
frequency set (in parallel to the lower set )
• The set is used according to the sequence, the mode
of operation and the number of sub-bands to be used
S1
S2
S3
S4
S5
S6
Submission
1
1
1
1
1
1
2
3
4
5
6
7
3
5
7
2
4
6
4
7
3
6
2
5
Slide 29
5
2
6
3
7
4
6
4
2
7
5
3
7
6
5
4
3
2
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Collision Example: S1 and S2
S1
S2, Phase A
S2, Phase B
S2, Phase C
S2, Phase D
S2, Phase E
S2, Phase F
S2, Phase G

1
1
6
4
2
5
1
6
2
3
1
6
4
7
3
1
3
5
3
1
6
2
5
3
4
7
5
3
1
6
4
2
5
2
7
5
3
1
6
4
6
4
2
7
5
3
1
6
7
6
4
2
7
5
3
1
1
1
6
4
2
7
5
3
2
3
1
6
4
2
7
5
3
5
3
1
6
4
2
7
4
7
5
3
1
6
4
2
5
2
7
5
3
1
6
4
6
4
2
7
5
3
1
6
7
6
4
2
7
5
3
1
Only one collision for every possible time
offset
Submission
Slide 30
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Variable-rate Time-Frequency
interleaving sequences
• Example for 7 sub-bands using S2 in the
different operation modes: 250, 125 and 83.3
Mpps
250
Mpps 1 3 5 7 2 4 6 1 3 5 7 2 4 6 1 3 5 7 2 4 6 1 3 5 7 2 4 6 1 3 5 7 2 4 6 1 3 5 7 2 4 6
125
Mpps 1
5
2
6
3
7
4
1
5
2
6
3
7
4
1
5
2
6
3
7
4
83.3
Mpps 1
7
6
5
4
3
2
1
7
6
5
4
3
2
•Preserve time-frequency sequences collision properties for all modes
•Reduce multi-path effect on collision between Piconets
•Improve multi-path mitigation and enable energy collection
Submission
Slide 31
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Variable Rate Time Frequency
interleaving sequences
• Example for 4 sub-bands using S2 in the
different operation modes: 250, 125 and 83.3
Mpps
250
Mpps 1 3
125
Mpps 1
83.3
Mpps 1
2 4
2
1 3
2 4
3
4
4
1 3
2 4
1
2
3
2
1 3
2 4
3
4
1
1 3
2 4
1
2
4
1 3
2 4
3
4
3
2
•For lower number of sub-bands only relevant sub-bands are used
•Preserve the collision properties for any number of sub-bands
Submission
Slide 32
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Multiple-Access
• Use of different time-frequency interleaving
sequences in different Piconets to reduce
collisions
• Reduce number of channels in use, to reduce
collisions (FDM alternative when link budget
good enough)
• Reduce pulse repetition frequency to reduce
multi-path effects on Multiple access
Submission
Slide 33
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Preamble
• Use CAZAC sequences over all subbands in use (Similar to mode 8)
• Approximately 10 Micro Seconds
• Achieve False-Alarm and Miss-Detect
requirements under multi-path and
multiple access interference
• Use color code to improve Piconet
identification
Submission
Slide 34
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
•
•
•
•
Targets
Main Features
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Self Evaluation
Conclusions
Submission
Slide 35
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Block Diagram – Analog Section
Antenna
T/R
LNA +
Interferer
Rejection
UWB
Filter
Down
Conversion +
Baseband
Including
Rake
I
Analog To
Digital
Q
Timing
Timing Control
Driver
Wave
Generator
Submission
Slide 36
TX Data
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Block Diagram – Digital Section
From Analog
To Analog
To Analog
Submission
DeModulator
Timing &
Phase
Control
Modulator
Inner
Decoder +
DeInterleaver
+ Viterbi
Decoder
Descrambler
To MAC
Coded bits are being spread over
the different sub-bands
Viterbi
Encoder +
Interleaver +
Inner
Encoder
Slide 37
Scrambler
From MAC
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Technical Feasibility
Establish wireless link using prototype:
15Mbps @ 30 meters
30Mbps @ 25 meters
60Mbps @ 18 meters
Submission
Slide 38
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Size
The size was calculated using SiGe process with fT=60GHz for the analog
blocks and 0.13 CMOS process for the digital blocks. The size includes pads
overhead.
Block
Analog Blocks
Analog to Digital
Digital Blocks + Pads
Total Die Size
Submission
Die Size [mm2]
3.3
0.4
3.1
6.8
Slide 39
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Main Modes: Bit Rates versus Power
Consumption and Link Margin
PHY Tx
Power
[mW]
(0.13u)
Total
PHY
Tx
Power
[mw]
RF- Rx
Power
[mW]
PHY Rx
Total
Power PHY Rx
[mW]
Power
(0.13u)
[mW]
Mode
Bit Rate
with 7
subbands
Link Budget
Margin
RF- Tx
Power
[mW]
5
125
4.84 dB @10m
65
20
85
100
30
130
3
250
9.79 dB @4m
95
30
125
140
40
180
Less than 1 mWatt per 1 Mbps
Submission
Slide 40
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
•
•
•
•
Targets
Main Features
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Self Evaluation
Conclusions
Submission
Slide 41
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
PHY Mapping on
current 802.15.3 MAC
• The proposed PHY can be used with the current
MAC without modifications
• Piconet channel is represented by a Time–Frequency
interleaving seed sequence
 Each Piconet choose a different seed sequence (channel)
 Devices in the same piconet use the same seed sequence
(channel)
Channel = Sequence
• The Piconet beacon frames are transmitted over all
sub-bands
 This is done transparently to the MAC (using PHY mode 8)
Submission
Slide 42
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Location Awareness
• Special command frame that support Time
Advanced measurement between two
Piconet devices
• Two devices exchange two messages
 Dev A to Dev B: Send time A
 Dev B to Dev A: Time Diff A(Receive Time A Send Time A ) and Send Time B
 Dev A calculates
 Time Diff B (Receive Time B - Send Time B )
 Time between Dev A to Dev B = ½ (Diff A + Diff B)
Submission
Slide 43
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
•
•
•
•
Targets
Main Features
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Self Evaluation
Conclusions
Submission
Slide 44
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Link Budget (7 sub-bands)
Mode
Bit Rate
Bit Rate per Band
Average Tx power
Distance
Path loss
Rx power
Average noise power per bit
Rx Noise Figure
Link Margin
5
125
17.86
-16.42
10
66.62
-83.04
-101.48
7
4.84
3
250
35.71
-16.42
4
58.66
-75.08
-98.47
7
9.79
1
500
71.43
-16.42
4
58.66
-75.08
-95.46
7
1.78
Mbps
Mbps
dBm
Meter
dB
dBm
dBm
dB
dB
Positive link margins for main modes
Submission
Slide 45
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Performance under multi-path condition
Without Equalizer
•
•
•
•
Bit rate: 125 Mbps (Mode 5)
Number of bands: 7
Simulating 400 channel realizations
For each point either 250 packets or 21
packet errors were used
• Results represent statistics of 5 Gbits
• Note: Shadow parameter in channel
model is very dominant
Submission
Slide 46
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps LOS 0-4 (CM1)
(with Shadow)
Submission
Slide 47
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps LOS 0-4 (CM1)
(No Shadow)
Submission
Slide 48
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps LOS 0-4 (CM1) Statistics
(With Shadow)
Submission
Slide 49
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM1-4 Statistics
(90% Average PER with Shadow)
Submission
Slide 50
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Performance under multi-path condition
(Distance for 8% Average PER Best 90%)
90% criteria
RMS 25
7.2
NLOS 4 to 10
9.8
NLOS 0 to 4
10.7
LOS - 0 to 4
13.3
0
2
4
6
8
distance [m ]
10
12
14
Modulation scheme copes with multi-path condition
without any equalization
Submission
Slide 51
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Co-Existence with 802.11A and 802.11B:
Required attenuation below FCC limits
Interferer
Center frequency
15.3a Transmitted Power Per 1MHz
Reciever BW
Reciever Sensitivity
15.3a Interference permitted power
Received Power at 1 Meter
Received Power at 0.3 Meter
Required attenuation at 1 meter
Required attenuation at 0.3 meter
11b
11a
2.4
-52
11
-76
-82
-81.63
-71.17
0.37
10.83
5.3
-41.3
20
-82
-88
-75.21
-64.76
12.79
23.24
Units
Ghz
dBm
MHz
dBm
dBm
dBm
dBm
dB
dB
802.11a requires attenuation above FCC limits
Submission
Slide 52
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Co-Existence (ADS simulation)
SPECTRUM 30cm from UWB Antenna with
with 5.17GHz Channel turned off
dBm/2MHz
-60
dbm(fs(Vo))
-80
-100
-120
-140
-160
-2
0
2
4
6
8
10
12
freq, GHz
System co-exist with 802.11a and 802.11b
Submission
Slide 53
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Interference
Submission
Required attenuation in Mode 5 (125Mbps with r = 0.5)
11b
11a
2.4
5.3
Center frequency
20
15
Tx power
-20.04
-31.92
Rx power at 1 meter
-9.58
-21.47
Rx power at 0.3 meter
-81.03
-81.03
Interference permitted power
16.46
16.46
Processing + Coding gain
44.53
32.65
Required attenuation at 1 meter
54.99
43.10
Required attenuation at 0.3 meter
Units
Ghz
dBm
dBm
dBm
dBm
dB
dB
dB
Required attenuation in Mode 3 (250Mbps with r = 0.5)
11b
11a
2.4
5.3
Center frequency
Tx power
20
15
-20.04
-31.92
Rx power at 1 meter
-9.58
-21.47
Rx power at 0.3 meter
-78.02
-78.02
Interference permitted power
13.45
13.45
Processing + Coding gain
44.53
32.65
Required attenuation at 1 meter
54.99
43.10
Required attenuation at 0.3 meter
Units
Ghz
dBm
dBm
dBm
dBm
dB
dB
dB
Slide 54
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
802.11a Interference 100 cm
(ADS Simulation)
Wanted signal bit energy @RED
Intereferer signal bit energy @Blue
0.008
EBIT_INT
EBIT
0.006
0.004
0.002
0.000
0
10
20
30
40
50
60
70
time, nsec
C/I [dB] @Interefer: 5.15GHz, -30dBm
C/I F1A
31.129
C/I F2A
23.761
C/I F3A
13.492
C/I F5A
11.335
C/I F6A
24.262
C/I F7A
36.603
C/I F8A
44.194
• Seven sub-bands with C/I better than 10 dB
after eliminating one sub-band (F4A)
Submission
Slide 55
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
802.11a Interference 30 cm
(ADS Simulation)
Wanted signal bit energy @RED
Intereferer signal bit energy @Blue
0.008
EBIT_INT
EBIT
0.006
0.004
0.002
0.000
0
10
20
30
40
50
60
70
time, nsec
C/I [dB] @Interefer: 5.15GHz, -20dBm
C/I F1A
21.697
C/I F2A
14.143
C/I F3A
3.996
C/I F5A
1.425
C/I F6A
14.582
C/I F7A
26.718
C/I F8A
34.313
• Five sub-bands with C/I better than 10 dB
after eliminating one sub-band (F4A)
Submission
Slide 56
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Performance with 802.11a under AWGN
Per with
802.11a Interference, AWGN, EbN0=EbN0(sensitivity)+6dB
0
PER
10
10
-1
-2
10
-58
-57.5
-57
-56.5
-56
-55.5
SIR [dB]
-55
-54.5
-54
• ISR=55 dB in AWGN (including F.E. rejection)
• Allows 30 cm separation
Submission
Slide 57
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Performance with 802.11a under CM1
PER
Per with 802.11a Interference, CM1 realization 49, EbN0 = EbN0 (sensitivity) + 6dB
0
10
10
-1
-2
10
-54
-53
-52
SIR [dB]
-51
-50
-49
• ISR=50 dB in CM1 (including F.E. rejection)
• Allows 50 cm separation
Submission
Slide 58
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Performance Under Multiple-Access
• Desired piconet:
LOS 0-4 (CM1:49)
• Interfering piconet:
LOS 0-4 (CM1:1)
• Worst case shift
between piconets
Uncoordinated
Piconets’
Transmitters
•ISR=12.3 dB for 8% per
Uncoordinated
Piconet Transmitter
Separation
Distance: dint
Receiver
Under
Test
Desired
Transmitter
Reference Piconet
distance: dref
•Allows R(Ref)/R(Int) = 4
•Example: R(Ref)=10 meters allows R(Int)=2.5 meters
•ISR can be improved by reducing number of sub-bands or increasing PRI
Submission
Slide 59
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
•
•
•
•
Targets
Main Features
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Self Evaluation
Conclusions
Submission
Slide 60
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Self Evaluation – General Solution Criteria
Signal Robustness
Technical Feasibility
CRITERIA
Evaluation
Unit Manufacturing Cost (UMC)
+
Interference And Susceptibility
+
Coexistence
+
Manufacturability
+
Time To Market
+
Regulatory Impact
+
Scalability
+
Location Awareness
0
Submission
Slide 61
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Self Evaluation – PHY Protocol Criteria
Submission
CRITERIA
Evaluation
Size and Form Factor
+
Payload Bit Rate
+
Packet Overhead
+
PHY-SAP Throughput
+
Simultaneously Operation Piconets
+
Signal Acquisition
+
System Performance
+
Link Budget
+
Sensitivity
+
Power Management Modes
+
Power Consumption
+
Antenna Practicality
+
Slide 62
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Self Evaluation – MAC Protocol
Enhancement Criteria
CRITERIA
Evaluation
MAC Enhancement and Modifications
+
Meets all selection criteria
Submission
Slide 63
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
•
•
•
•
Targets
Main Features
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Self Evaluation
Conclusions
Submission
Slide 64
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Conclusions
• Multi-Band scheme
30 Sub-bands allows flexible system
meets all selection criteria
• Variable-Pulse-Rate
Low power for lower bit rates
Reduces ISI problem without equalizer
Improves multiple access
• Technology demonstrated on prototype
Submission
Slide 65
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
802.15.3a Early Merge Work
Wisair will be cooperating with:
•
•
•
•
•
•
•
Intel
Time Domain
Discrete Time
General Atomics
Philips
FOCUS Enhancements
Samsung
Objectives:
We encourage participation by any
party who can help us reach our
goals.
• “Best” Technical Solution
• ONE Solution
• Excellent Business Terms
• Fast Time To Market
Submission
Slide 66
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Backup Slides
Submission
Slide 67
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Submission
Slide 68
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Submission
Slide 69
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Submission
Slide 70
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
MAC Enhancements (1)
• UWB based WPAN system should support a higher
bit rate (e.g. 110Mbps, 200Mbps)
 Current MAC Throughput is degraded in high bit rate
• Support a bigger packet length
 Bigger packets may be needed for high data rate
applications
• Improve the throughput
 For both small and large packet sizes
 For retransmission mode
• Support Multiband channel assignment
 Decide on usable sub bands
 Select the time frequency interleaving sequence
Submission
Slide 71
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
MAC Enhancements (2)
PHY SAP Data Throughput Calculation
Frame n Transmision
MPDU_bits
(variable)
Preamble
PHY Header
T_PA_INIT
T_PHYHDR
MAC
Header
HCS
T_MACHDR T_HCS
MPDU
T_MPDU
FCS
MIFS
T_FCS T_MIFS
Payload Throughput PHY-SAP = N x Payload_bits /
[ T_PA_INITIAL+T_SIFS +
(N-1) x (T_PA_CONT+T_MIFS) +
N x (Payload_bits/R_Pay+T_MACHDR +
T_PHYHDR+T_HCS+T_FCS)]
Submission
Slide 72
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
MAC Enhancements (3)
IEEE802.15.3 PHY-SAP Data Throughput
802.15.3 PHY SAP Data Throughput
Throughput, Mbps
60
50
Payload Throughput
R_PAY=55Mbps
Payload Throughput
R_PAY=44Mbps
Payload Throughput
R_PAY=33Mbps
Payload Throughput
R_PAY=22Mbps
40
30
20
10
0
0
1000
2000
3000
4000
5000
Packet Size [Octets]
N= 5 Frames
T_PA_INITIAL = 15uSec
T_PA_CONT = 15uSec
Submission
MACHDR=10 Octets
PHYHDR=2 Octets
HCS=2 Octets
T_SIFS = 10uSec
FCS = 4 Octets
T_MIFS = 2uSec
Slide 73
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
MAC Enhancements (4)
IEEE802.15.3 PHY-SAP Data Throughput in High Bit Rates
802.15.3 Data Throughput for high bit rates
Throughput, Mbps
300
Payload Throughput
R_PAY=110Mbps
250
200
Payload Throughput
R_PAY=220Mbps
150
100
Payload Throughput
R_PAY=330Mbps
50
0
0
1000
2000
3000
4000
5000
packet size [Octets]
N= 5 Frames
T_PA_INITIAL = 15uSec
T_PA_CONT = 15uSec
Submission
MACHDR=10 Octets
PHYHDR=2 Octets
HCS=2 Octets
T_SIFS = 10uSec
FCS = 4 Octets
T_MIFS = 2uSec
Slide 74
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
MAC Enhancements(5)
Proposed MAC Performance PHY-SAP Data Throughput in
High Bit Rates
Throughput , Mbps
Modified MAC Data Throughput
350
300
250
200
150
100
50
0
Payload Throughput
R_PAY=110Mbps
Payload Throughput
R_PAY=220Mbps
Payload Throughput
R_PAY=330Mbps
0
1000
2000
3000
4000
5000
Packet Size [Octets]
N= 5 Frames
T_PA_INITIAL = 15uSec
T_PA_CONT = 15uSec
Submission
MACHDR=10 Octets
PHYHDR=2 Octets
HCS=2 Octets
T_SIFS = 10uSec
FCS = 4 Octets
T_MIFS = 2uSec
Slide 75
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
MAC Enhancements (6)
Proposed MAC Frame Structure
• Allow larger MAC frame body size (e.g. 4096
Octets
 Frame body consists of N Sub-frames
 Sub-frame consists of Data block unit and CRC
 Data block unit is limited by a maximum number of
octets (e.g. 512 octets)
FCS#1
(CRC16)
Data Block #1
FCS#2
(CRC16)
Data Block #2
FCS#N
Data Block #N
(CRC16)
MAC Header
MAC Sub Frame
MAC Frame Body
Submission
Slide 76
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
MAC Enhancements (7)
• The proposed UWB PHY structure is based on
multi-band UWB system
 MAC logical channel is mapped to several frequency
bands
 Some bands might be interfered (useless) by other
existing systems (I.e IEEE802.11a – 5GHz)
 MAC should be able to drive a Bands Quality
Assessment (BQA) that determines whether a specific
band is usable or not
 The Piconet Coordinator (PNC) should be able to
distribute the usable bands to all its associated devices
Submission
Slide 77
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
MAC Enhancements (8)
• Provide BQA time slot at the Supperframe
• Useful information is distributed as
Information Element (IE) over PNC
Beacon
• Beacon will transmitted over the whole
frequency bands
Submission
Slide 78
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
MAC Enhancements (9)
IE#1
IE#2
Beacon
Beacon
IE#i Usable
Bands
CAP
CTA#1
CTA#2
CTA#i
Bands
Quality
Assessment
CTA#
i+1
CTA#
N
CFP
MAC Super-Frame
Submission
Slide 79
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
Contents
•
•
•
•
Physical layer
Implementation and Feasibility
MAC enhancements
Performance
Submission
Slide 80
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM1 channels
Submission
Slide 81
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM1 (No Shadow)
Submission
Slide 82
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM1 Statistics
Submission
Slide 83
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM2 channels
Submission
Slide 84
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM2 (No Shadow)
Submission
Slide 85
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM2 Statistics
Submission
Slide 86
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM3 channels
Submission
Slide 87
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM3 (No Shadow)
Submission
Slide 88
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM3 Statistics
Submission
Slide 89
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM4 channels
Submission
Slide 90
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM4 (No Shadow)
Submission
Slide 91
Gadi Shor, Wisair
March 2003
doc.: IEEE 802.15-03/151r1
125 Mbps CM4 Statistics
Submission
Slide 92
Gadi Shor, Wisair