submission doc.: ieee 11-14/0136r2 january 2014 gal basson, wilocityslide 1 beyond 802.11ad –...
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Submission
doc.: IEEE 11-14/0136r2January 2014
Gal Basson, WilocitySlide 1
Beyond 802.11ad – Ultra High Capacity and Throughput WLAN 2nd presentation
Name Affiliations Address Phone email
Gal Basson Wilocity [email protected]
Cordeiro Carlos Intel [email protected]
Payam Torab Jahromi Broadcom [email protected]
Hui-Ling Lou Marvell [email protected]
Lei Huang Panasonic [email protected]
Sven Mesecke Nitero [email protected]
Ismail Lakkis Tensorcom [email protected]
Sai Nandagopalan Adeptence [email protected]
Brad Lynch Peraso Technologies
Uri Parker Wilocity [email protected]
Gaius Yao Huang Wee
Panasonic [email protected]
Lei Wang Marvell [email protected]
SangHyun Chang Samsung [email protected]
Submission
doc.: IEEE 11-14/0136r2January 2014
Gal Basson, WilocitySlide 2
Abstract
We would like to continue the discussion about creating a new Study Group to explore modifications to the IEEE 802.11ad-2012 PHY and MAC layers, so that modes of operation in the 60 GHz band (57-66 GHz) can be enabled that are capable of a maximum throughput of at least 30 Gbps as measured at the MAC data service access point (SAP), while maintaining the excellent capacity attribute of the 60GHz band.
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
Agenda
• 802.11ad attributes• Small antenna footprint
• Antenna arrays at 60GHz
• Low operating SNR
• Capacity at 60GHz
• Next generation (NG) 802.11ad• High data rates usages reminder
• Methods for increasing the TPT
• Further innovation for next generation 802.11ad
Slide 3
January 2014
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
802.11ad attributes (1)
• 60GHz has very small antenna footprint• mm compared to cm
• Due to the low footprint, 60GHz communication can use antenna arrays
• Many advantages of using antenna array in 60GHz• Increases link margin• Increases directivity• Implementation wise: higher efficiency when trying to
get high EIRP numbersSlide 4
January 2014
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
802.11ad attributes (2)
• 802.11ad high rate is a result of using high BW (1.76 GHz)
• The operating SNR for 4.6Gbps is lower than 14 dB
Slide 5
January 2014
MCS Rate[Mbps] Noise floor Antenna Gain NF Array Gain SNR Sensetivity0 CP -82 5 6.5 0 -12 -92.51 385 -82 5 6.5 12 -0.35 -92.852 770 -82 5 6.5 12 0.71 -91.793 962.5 -82 5 6.5 12 2 -90.54 1155 -82 5 6.5 12 3.3 -89.25 1251 -82 5 6.5 12 4 -88.56 1540 -82 5 6.5 12 3.64 -88.867 1920 -82 5 6.5 12 4.9 -87.68 2310 -82 5 6.5 12 6.35 -86.159 2502 -82 5 6.5 12 7 -85.510 3080 -82 5 6.5 12 11.1 -81.411 3850 -82 5 6.5 12 12 -80.512 4620 -82 5 6.5 12 13.3 -79.2
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
802.11ad attributes: capacity (3)
• Directivity and low operating SNR are fantastic attributes to increase capacity
• 60GHz can significantly increase network capacity• Directivity in many situations dramatically reduces or eliminates
OBSS interference
• Low operating SNR means better resilience to interference
• We have shown amazing numbers of spatial reuse
• Simulation from 11-13 408r2
Slide 6
March 2013
48 pairsHall size 20x20x2.5 meters
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
Next Generation 802.11ad
Slide 7
January 2014
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, WilocitySlide 8
January 2014
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
Methods for increasing the TPT
• Channel bonding [1]• We have suggested 2 additional BW
• Double channel-5.28GHz
• Quadruple channel-10.56GHz
• We have shown technology feasibility of such an analog FE today.• Marinating low power
• MIMO [1]• “Traditional MIMO”
• “Spatial orthogonal MIMO”• For receiver simplification
• Shown channel measurement• 11-13 408r2
Slide 9
January 2014
Secto
r #1
Sector #2
Sector #3Sector #4
Sector #N
Sector #1Sector #2
Sector #3Sector #4
Sector #N
RED – best ray and best pair of TX-RX sectorsGreen – second best pair of sectors
Blue – third best pair of sectors
TX RX
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
Example: rate table
Slide 10
January 2014
π/2-BPSK 1 SC 1/2 0.77 1.54 3.1π/2-BPSK 1 SC 3/4 1.155 2.31 4.6π/2-QPSK 1 SC 1/2 1.54 3.08 6.2π/2-QPSK 1 SC 3/4 2.31 4.62 9.2
π/2-16QAM 1 SC 1/2 3.08 6.16 12.3π/2-16QAM 1 SC 3/4 4.62 9.24 18.5
64QAM 1 OFDM 3/4 6.2 12.4 24.8π/2-BPSK 2 SC 1/2 1.54 3.08 6.2π/2-BPSK 2 SC 3/4 2.31 4.62 9.2π/2-QPSK 2 SC 1/2 3.08 6.16 12.3π/2-QPSK 2 SC 3/4 4.62 9.24 18.5
π/2-16QAM 2 SC 1/2 6.16 12.32 24.6π/2-16QAM 2 SC 3/4 9.24 18.48 37
64QAM 2 OFDM 3/4 12.4 24.8 49.6π/2-BPSK 4 SC 1/2 3.08 6.16 12.3π/2-BPSK 4 SC 3/4 4.62 9.24 18.5π/2-QPSK 4 SC 1/2 6.16 12.32 24.6π/2-QPSK 4 SC 3/4 9.24 18.48 37
π/2-16QAM 4 SC 1/2 12.32 24.64 49.3π/2-16QAM 4 SC 3/4 18.48 36.96 73.9
64QAM 4 OFDM 3/4 24.8 49.6 99.2
Modulation NSS PHY Code RateData Rate (Gbps)
BW=1.76GHz BW=3.52GHz BW=7.04GHz
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
Protocol overheads at high rates
• 802.11ad NG can introduce rates as high as 100Gbps
• 802.11ad introduced VERY low PHY overheads and low latency protocol• 3 uSec SIFS• PHY preambles including header <2usec
• Questions:• Will these parameters affect such high data rates?
• What can be done in 802.11ad NG to accommodate this?
Slide 11
January 2014
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
Protocol overheads at high rates
• The architecture assumes transmissions will have to be stored on chip due to transmission retry.
• On chip memory will grow bigger 5 years from now
Slide 12
January 2014
0 10 20 30 40 50 60 70 80 90 10040
50
60
70
80
90
100
Speed [Gbps]
PH
Y O
verH
ead
PHY Overhead high speed
Memory size 100KBMemory size 200KB
Memory size 400KB
Memory size 1MB
Memory size 2MB
Memory size 4MBMemory size 10MB
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
Possible additions to 802.11ad NG: backhaul support
• There is a lot of industry interest in backhaul communication using 60 GHz• ISM band
• Small antenna footprint
• Phased array
• Commodity Si is available (Price is lower)
• Usages are targeting up to 1Km range
• Need to explore the requirements and accommodate through 802.11ad NG
Slide 13
January 2014
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
Summary
• 802.11ad-based products are shipping in the market today; more are expected to come in the near future
• Increasing demand for capacity and new applications are driving the desire to enhance 11ad to support these needs
• Technical feasibility to enhance 11ad with MIMO and channel bonding have been widely demonstrated
• Suggest that 802.11 start a new SG on next generation 11ad
Slide 14
January 2014
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
Straw polls
1. Would you agree to form a new 802.11 SG on this topic at the May/14 802.11 meeting?
Slide 15
January 2014
Submission
doc.: IEEE 11-14/0136r2
References
1. https://mentor.ieee.org/802.11/dcn/13/11-13-1408-01-0wng-beyond-802-11ad-ultra-high-capacity-and-tpt-wlan.pptx
Slide 16
January 2014
Carlos Cordeiro, Intel
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
Backup
Slide 17
January 2014
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
MIMO at 60 GHz: can we simplify?
• Reminder: 4.6 Gbps can be achieved at 13 dB SNR
• Can we create “spatial orthogonal streams”• A diagonal channel matrix on the receiver
• 60 GHz require 10 dB SNR for decoding 3Gbps
• Training should be done via BF mechanismSector sweep and BRP
• Low cost/complexity receiver• lower digital complexity
Slide 18
November 2013
Secto
r #1
Sector #2
Sector #3Sector #4
Sector #N
Sector #1Sector #2
Sector #3Sector #4
Sector #N
RED – best ray and best pair of TX-RX sectorsGreen – second best pair of sectors
Blue – third best pair of sectors
TX RX
Signal #1 Signa
l #2
Σ Σ
Antenna elements
RF signal Summators (RX)
or Multiplexors (TX)
Radio frequency to Baseband
transformation
RFToBB
RFToBB
Phase shiftersΦ Φ Φ Φ Φ Φ Φ Φ
Σ Interference cancellation block
Channel estimation and
weights calculation
Antenna array #1 Antenna array #2
Σ
Submission
doc.: IEEE 11-14/0136r2
Gal Basson, Wilocity
MIMO Channel measurement at 60GHz
• Planar array-16 elements
• Channel matrix was measured (16x16)• LOS and NLOS
• Antenna channel correlation-
• LOS-conductive 0.996-meaning all antennas see same channel
• LOS-0.724- not fully correlated
• Channel model D (IEEE 11n)- 0.4-0.5
Slide 19
November 2013
0 20 40 60 80 100 120 1400
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
LOS-planar array