doc.: ieee 802.11-10-0498-03-00ad submission may 2010 hiroshi harada, nictslide 1 complete proposal...

doc.: IEEE 802.11-10-0498-03-00ad

Submission

May 2010

Hiroshi Harada, NICTSlide 1

Complete Proposal for 802.11ad Date: 2010-05-01

Authors:

Name Company Address Phone Email

Hiroshi Harada

NICT

3-4, Hikarino-oka, Yokosuka, Japan

+81-46-847-5074 [email protected]

Chang-Woo Pyo [email protected]

Zhou Lan [email protected]

Junyi Wang [email protected]

Ryuhei Funada [email protected]

Tuncer Baykas [email protected]

Chin Sean Sum [email protected]

Akio Iso [email protected]

Shuzo Kato [email protected]

Masahiro Umehira [email protected]

Lu Liru, Alina 20 Science Park Road, #01-09A/10,

TeleTechPark, Singapore

[email protected]

Zhang Xin [email protected]

doc.: IEEE 802.11-10-0498-03-00ad

Submission

May 2010


Name Company Address Phone Email

Hirokazu SawadaTohoku

University

2-1-1 Katahira, Aoba-ku,. Sendai. 980-8577 Japan

[email protected]

Ichirou IdaFujitsu Limited

211-8588,kawasaki, kanagawa, Japan

[email protected]

Kaoru Yokoo [email protected]

Nobuhiko Shibagaki Hitachi

1-280, Higashikoigakubo Kokubunji, Tokyo,

185-8601 Japan

[email protected]

Shoichi Kitazawa ATR [email protected]

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Summary• This document proposes the PHY and MAC layer design for 802.11ad

operating in the 60GHz band

• PHY layer design– A hybrid PHY designed consisting of the SC PHY and the OFDM PHY is

proposed– Channelization of the 60GHz band is presented– Data rate modes of respective PHYs are listed– Common mode signaling bridging across two PHYs is introduced– Frame format for respective PHYs are presented

• MAC layer design– Proposed MAC contains Basic MAC and Enhanced MAC– Basic MAC is based on 802.11-2007 and other amendments to support 802.11

user experience– Enhanced MAC is designed to achieve very high throughput (>1Gbps),

directivity support, coexistence with other 60GHz systems and QoS improvement

• Beam forming

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Motivation of Proposal

• This proposal has the following purposes of– Enhancement of 802.11 PHY and MAC to fulfill the

requirements of 802.11ad system

– Co-existence of other already standardized 60GHz systems such as 802.15.3c WPAN

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Presentation Outline

Section 1: PHY Proposal for 802.11ad– Overview of the Proposed 802.11ad PHY

– Channelization

– Modulation and Coding

– Common Mode Signaling

– SC PHY Frame Format

– OFDM PHY Frame Format

– PHY Simulation Results

Section 2: MAC Proposal for 802.11ad– Overview of the proposed 802.11ad MAC

– Enhanced MAC

– Co-existence

– MAC Simulation Results

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Section 1: PHY Proposal for 802.11ad

6

May 2010

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Abbreviations

• FEC – forward error correction

• MCS – Modulation and Coding Scheme

• SC - Single carrier

• OFDM - Orthogonal Frequency Division Multiplexing

• CMS – Common Mode Signaling

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Presentation Outline (PHY Layer)

• Overview of the Proposed 802.11ad PHY

• Channelization

• Modulation and Coding

• Common Mode Signaling

• SC PHY Frame Format

• OFDM PHY Frame Format

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Overview of the Proposed 802.11ad PHY

• The proposed 802.11ad PHY consists any or the combination of the following:– SC PHY

– OFDM PHY

• Features of the PHY modes:– The SC PHY mainly targets applications with low complexity

– The OFDM PHY mainly targets applications that require higher data rates

• To reduce implementation burden, both PHYs are designed to have similarities in the aspects of frame construction

• To manage multi-PHY-mode management and mitigate interference, the CMS is specified to facilitate coexistence between the SC PHY and the OFDM PHY

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Channelization

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Overview on SC and OFDM Data Rates

• The SC and OFDM classes of data rates give flexibility to various potential applications requiring data rate support from several hundreds of Mbps to several Gbps

• The data rate classes are categorized as:– Class 1 – up to 1.6Gbps

– Class 2 – up to 3 Gbps

– Class 3 – up to 7 Gbps

• A Robust MCS called CMS is proposed to bridge between the SC and OFDM PHYs

• In OFDM PHY, three modes with different FFT sizes are proposed for flexibility.

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Timing Related Values for SC PHY

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

MCSs for SC PHYMay 2010

Hiroshi Harada, NICTSlide 13*Mandatory MCSs

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Timing Related Values for OFDM PHY MODE 1

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission


May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

MCS for OFDM PHY

May 2010


*FFT size: 512, 128, 64

Data rates are for FFT sizes 512 and 128. For 64, data rates are around 10% less.

doc.: IEEE 802.11-10-0498-03-00ad

Submission

MCS for Common Mode Signaling

May 2010


*Note that CMS is the first MCS in the SC PHY table

doc.: IEEE 802.11-10-0498-03-00ad

Submission

CMS Functional Description

• CMS is the most robust and long reaching MCS in the SC PHY and is specified to bridge between the SC PHY and OFDM PHY

• CMS is the mandatory MCS for all STAs

• CMS is employed in procedures facilitating multi-PHY-mode network management (i.e. discovery and synchronization) and other cross-PHY procedures

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Generic Frame Format• The following slides show the components of the SC PHY

and OFDM PHY frames– PLCP preamble

– SIGNAL

– DATA

• The modulation and coding schemes used in respective components are given

• The generic frame format for SC PHY and OFDM PHY are the same– PLCP preamble structure for SC PHY and OFDM PHY are the

same

– SIGNAL field structure for SC PHY and OFDM PHY are the same

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

SC PHY Frame Format~ General ~

May 2010


PLCP Preamble

SIGNAL DATA

Modulation /2 BPSK /2 BPSK/2 BPSK, /2 QPSK, /2 8PSK, /2 16-QAM

FEC N/A RS(23,7)RS(255,239), LDPC(672,336), LDPC(672,504), LDPC(672,588)

Spreading factor

N/A 64, 2 64, 4, 2, 1

doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM PHY Frame Format~ General ~

May 2010


PLCP Preamble SIGNAL DATA

Modulation /2 BPSK QPSK-OFDMQPSK,-OFDM 16-QAM-OFDM, 64-QAM-OFDM

FEC N/A LDPC(672,336)LDPC(672,336), LDPC(672,504), LDPC(672,588)

Spreading factor

N/A 1 1

doc.: IEEE 802.11-10-0498-03-00ad

Submission

SC and OFDM PHY Frame Format~ PLCP Preamble for CMS ~

May 2010


CMS Preamble

doc.: IEEE 802.11-10-0498-03-00ad

Submission

SC and OFDM PHY Frame Format~ PLCP Preamble for SC PHY and OFDM

PHY ~

May 2010


SC Preamble

OFDM Preamble

doc.: IEEE 802.11-10-0498-03-00ad

Submission

SC and OFDM PHY Frame Format~ PLCP Preamble Golay Sequences ~

Golay Sequence Name Sequence Values

a128 0536635005C963AFFAC99CAF05C963AF

b128 0A396C5F0AC66CA0F5C693A00AC66CA0

May 2010


a256 = [b128 a128 ]

b256 = [b128 a128 ]

doc.: IEEE 802.11-10-0498-03-00ad

Submission

PHY Frame Format~ SIGNAL ~

May 2010


• PHY header (5 octets) contains– Scrambler ID (4 bits)

• Information on scrambling seed– Aggregation (1 bit)

• indicates whether aggregation is used– MCS (5 bits)

• indicates the modulation and coding information of DATA– Frame length (20 bits)

• Indicates the length of the frame– Pilot Word Length (2 bit)

• indicates the type of pilot word length in DATA, ignored in OFDM PHY– Reserved (8 bits)

Scrambler ID Aggregation MCS Frame Length

Pilot Word Length

Reserved

doc.: IEEE 802.11-10-0498-03-00ad

Submission

SC PHY PLCP SIGNAL Construction

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

SC PHY DATA Construction

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM PHY PLCP SIGNAL Construction

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM PHY DATA Construction

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Results of PHY Simulation

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Simulation Parameters for Single Carrier PHY Evaluation

May 2010

32

Description Value Unit

Symbol Rate 1760 Mchips/s

SymbolDuration ~0.568 ns

Sublock Length 512 chips

Pilot Word length 64 chips

Data symbols per subblock

448 chips

Subblock Duration ~290.9 ns

Subblock rate ~3.44 MHz

Hiroshi Harada, NICT

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Simulation Channel Model

• AWGN channel model

• Fading channel model and scenarios

– Living Room (LR)

• Omni to Omni LOS

• Omni to Direction NLOS

• Directional to Directional NLOS

– Conference Room (CR)

• Omni to Omni LOS

• Omni to Direction NLOS

• Directional to Directional NLOS

– Hardware impairments as described in evaluation documents are considered in the simulation

May 2010

33 Hiroshi Harada, NICT

doc.: IEEE 802.11-10-0498-03-00ad

Submission

SC PHY MCSsMCS Class MCS

Index

Data Rate Modulation FEC Coding Rate

Data

Spreading

FactorPW=64 PW=0

SC Class 1 0 * 26 Mbps p/2-BPSK RS (255,239) 0.937 64

1 361 Mbps 412Mbps 4

2 722 Mbps 825Mbps 2

3 * 1440Mbps 1650 Mbps 1

4 1160 Mbps 1320 Mbps LDPC(672,504) 0.75 1

5 385 Mbps 440 Mbps LDPC(672,336) 0.5 2

6 770 Mbps 880 Mbps 1

SC Class 2 7 1540 Mbps 1760 Mbps p/2-QPSK LDPC(672,336) 0.5 1

8 2310 Mbps 2640 Mbps LDPC(672,504) 0.75 1

9 2700 Mbps 3080 Mbps LDPC(672,588) 0.875 1

10 2890 Mbps 3300 Mbps RS (255,239) 0.937 1

SC Class 3 11 3470 Mbps 3960 Mbps p/2-8PSK LDPC(672,504) 0.75 1

12 4620 Mbps 5280 Mbps p/2-16QAM 1

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

SC All MCSs AWGN PER

-10 -5 0 5 1010

-2

10-1

100

CNR (dB)

PE

RSC MCSs AWGN PER

MCS0MCS1MCS2MCS3MCS4MCS5MCS6MCS7MCS8MCS9MCS10MCS11MCS12

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Living Room Omni-Omni-LOS

-10 -5 0 5 10 1510

-2

10-1

100

CNR (dB)

PE

R

SC FADING Living Room Omni-Omni LOS PER


PA Backoff Power:MCS0: 0.5dBMCS1: 0.5dBMCS2: 0.5dBMCS3: 0.5dBMCS4: 0.5dBMCS5: 0.5dBMCS6: 0.5dBMCS7: 5dBMCS8: 5dBMCS9: 5dBMCS10: 6dBMCS11: 5dBMCS12: 5dB

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Conference Room Omni-Omni-LOS

-10 -5 0 5 10 1510

-2

10-1

100

CNR (dB)

PE

R

SC FADING Conference Room Omni-Omni LOS PER



May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Living Room Omni-Directional-NLOS

-10 -5 0 5 10 1510

-2

10-1

100

CNR (dB)

PE

R

SC FADING Living Room Omni-Directional NLOS PER



May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Conference Room Omni-Directional-NLOS

-10 -5 0 5 10 1510

-2

10-1

100

CNR (dB)

PE

R

SC FADING Conference Room Omni-Directional NLOS PER



May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Living Room Directional-Directional-NLOS

-10 -5 0 5 10 15 2010

-2

10-1

100

CNR (dB)

PE

R

SC LDPC FADING Living Room Directional-Directional NLOS PER



May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Conference Room Directional-Directional-NLOS

-10 -5 0 5 10 15 2010

-2

10-1

100

CNR (dB)

PE

R

SC LDPC FADING Conference Room Directional-Directional NLOS PER



May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

May 2010

42

Description Value Unit

Nominal Bandwidth 2640 MHz

Number of Subcarriers 512

Number of Data Subcarriers 336

Number of Reserved Subcarriers 16

Number of Pilot Subcarriers 16

Number of NULL Subcarriers 141

Number of DC Subcarriers 3

Subcarrier Frequency Spacing 5.15625 MHz

FFT period ~193.94 ns

Guard Interval Duration ~24.24 ns

OFDM Symbol Duration ~218.18 ns

Packet Size 6720 Bytes

Simulation Parameters for OFDM PHY Evaluation


doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM PHY MCSs

MCS Class Data Rate

Modulation FEC Coding Rate

Spreading

OFDM Class 1 1540 QPSK LDPC(672,336) 0.5 1

OFDM Class 2 2310 LDPC(672,504) 0.75 1

2695 LDPC(672,588) 0.875 1

OFDM Class 3 3080 16-QAM LDPC(672,336) 0.5 1

4620 LDPC(672,504) 0.75 1

5390 LDPC(672,588) 0.875 1

6930 64-QAM LDPC(672,504) 0.75 1

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM on AWGN

May 2010


0 5 10 15 20 25 30

10-2

10-1

100

CNR (dB)

Pac

ket

Err

or

Ra

te

QPSK-OFDM+LDPC(1/2)QPSK-OFDM+LDPC(3/4)QPSK-OFDM+LDPC(7/8)16QAM-OFDM+LDPC(1/2)16QAM-OFDM+LDPC(3/4)16QAM-OFDM+LDPC(7/8)64QAM-OFDM+LDPC(3/4)

doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM MCSs on Channel model #1- Living room, Omni Tx, Omni Rx, LOS

May 2010


0 5 10 15 20 25 30

10-2

10-1

100

CNR (dB)

Pac

ket E

rror

Rat

e


PA Backoff Power:QPSK(1/2): 10dBQPSK(3/4): 10dBQPSK(7/8): 10dB16QAM(1/2): 14dB16QAM(3/4) :14dB16QAM(7/8): 14dB64QAM(3/4): 14dB

doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM MCSs on Channel model #2- Living room, Omni Tx, Directional Rx, NLOS

May 2010


0 5 10 15 20 25 30

10-2

10-1

100

CNR (dB)

Pac

ket E

rror

Rat

e



doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM MCSs on Channel model #3-Living room, Directional Tx, Directional Rx, NLOS

May 2010


0 5 10 15 20 25 30

10-2

10-1

100

CNR (dB)

Pac

ket E

rror

Rat

e



doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM MCSs on Channel model #4- Conference room, Omni Tx, Omni Rx, LOS

May 2010


0 5 10 15 20 25 30

10-2

10-1

100

CNR (dB)

Pac

ket E

rror

Rat

e



doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM MCSs on Channel model #5- Conference room, Omni Tx, Directional Rx,

NLOS

May 2010


0 5 10 15 20 25 30

10-2

10-1

100

CNR (dB)

Pac

ket E

rror

Rat

e



doc.: IEEE 802.11-10-0498-03-00ad

Submission

OFDM MCSs on Channel model #6- Conference room, Directional Tx, Directional Rx, NLOS

May 2010


0 5 10 15 20 25 30

10-2

10-1

100

CNR (dB)

Pac

ket E

rror

Rat

e



doc.: IEEE 802.11-10-0498-03-00ad

Submission

FA/MD of Proposed SC SFD

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.810

-4

10-3

10-2

10-1

100

Threshold

Pm

,Pf,

(Eb/

No

=-6

dB)

SC SFD FA/MD Test

PmaaPfaaPfabPfacPfadPfaePfaf

a: NICT SC SFD; b: NICT OFDM SFDc: 802.15.3c MR SFD; d: 802.15.3c HR SFDe: 802.15.3c CTAP SFD; f: 802.15.3c CAP SFD

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

FA/MD of Proposed OFDM SFD

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.810

-4

10-3

10-2

10-1

100

Threshold

Pm

,Pf,

(Eb/

No

=-6

dB)

OFDM SFD FA/MD Test

PmaaPfaaPfabPfacPfadPfaePfaf

a: NICT OFDM SFD; b: NICT SC SFDc: 802.15.3c MR SFD; d: 802.15.3c HR SFDe: 802.15.3c CTAP SFD; f: 802.15.3c CAP SFD

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Section 2: MAC Proposal for 802.11ad

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Presentation Outline (MAC Layer)

Part1: Overview of the proposed 802.11ad MAC– Concept

– Basic MAC

– Enhanced MAC

– High level MAC operations

Part2: Enhanced MAC– Contention-free period (CFP) scheduling

– Enhanced data transmission

– Enhanced co-existence

– Directivity support

Part3: MAC Simulation Results– Point to point link

– Home living room

– Office conference room

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Part1: Overview of the proposed 802.11ad MAC

55

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Concept for Proposed 802.11ad MAC• Proposed 802.11ad MAC contains Basic MAC to maintain

802.11 user experience, and Enhanced MAC to achieve very high throughput and to support directivity and co-existence

56

802.11ad MAC802.11ad MAC

Basic MAC based on 802.11-2007Basic MAC based on 802.11-2007

Enhanced MAC for Very High Throughput, Directivity

and Co-existence

Enhanced MAC for Very High Throughput, Directivity

and Co-existence

+

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Basic MAC

• All basic functionalities of 802.11ad MAC are based on 802.11-2007 and other available amendments to support 802.11 user experience

• Basic MAC functions– Scan

– Association/Re-associaton/Disassociation

– Authentication/Dis-authentication

– Channel Accesses – DCF, PCF, HCF, HCCA

– Other functions – synchronization, power management, security, etc.

57

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Enhanced MAC

• Enhanced MAC is designed to achieve very high throughput (>1Gbps), directivity support, coexistence with other 60GHz systems and QoS improvement

• Enhanced MAC functions1. Very High Throughput Achievement

• Contention-Free Period (CFP) Scheduling• Enhanced data transmission in CFP

– Frame aggregation & Aggregation-ACK– Bi-directional aggregation with ACK

2. Directivity Support• Directional association• Beamforming

3. Co-existence Support• Co-existence among homogeneous systems• Co-existence among heterogeneous systems

58

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

High-Level MAC Operations in 802.11ad


May 2010

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Part2: Details of Enhanced MAC

60

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Contention-Free Period Scheduling

• Contention-Free Period (CFP) scheduling supports enhanced data transmission– Dynamically scheduled CFP guarantees the high

throughput and delay requirements of 60GHz applications

61

(Example of contention-free period scheduling)

B (Beacon)TS (Traffic Stream)CP (Contention Period)CFP(Contention Free Period)

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Enhanced Data Transmission• Enhanced data transmission in CFP includes beamforming

support, frame aggregation/aggregation-ACK– Beamforing period in CFP guarantees the beamform procedure free

from interference– Frame aggregation / Aggregation-ACK/ Bi-directional aggregation

with is provided to meet QoS requirements of throughput and delay – On-demand aggregation is performed with negotiation between

Src/Dest

62

(Example of data transmission during CFP)

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Aggregation / Aggregation ACK / Bi-directional aggregation with ACK

• Proposed aggregation supports to aggregate video traffics (video aggregation MSDU, VA-MSDU)

• VA-MSDU frame body consists of– MAC subheader with HCS and aggregated MSDUs with Subframe FCS (SFCS)– MAC subheader contains

• Aggregated MSDUs information• Aggregation ACK (A-ACK) bitmap

• VA-MSDU allows– maximum length of each MSDU (including SFCS) : 1Mbytes – maximum length of aggregated MSDUs : 16Mbytes– Bi-directional VA-MSDU by using both of aggregation and aggregation ACK bitmap

63

Preamble PLCP Header PSDU Tail / Pad bits

MAC Header Frame Body FCS

MAC Header MAC Subheader HCS MSDU 1 SFCS MSDU 2 SFCSMSDU

16SFCS...

MAC HeaderMAC Subheader

With A-ACK bitmapHCS

MAC Header MSDU 1 SFCS MSDU 2 SFCSMSDU

16SFCS...

MAC SubheaderWith A-ACK bitmap

HCS

PHY frame

Normal MAC frame

VA-MADU MAC frame

VA-MADU ACK frame

Bi-directional VA-MADU with ACK

SFCS (Subframe FCS)

May 2010

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Negotiation for Aggregation• Negotiation for Aggregation

– for capability confirmation– in CFP or CP– on-demand between Src and Dest– directly between AP and STAs– directly between STA and STA after Directed Link Setup (DLS) defined

in 802.11-2007

64

Neg.

Neg.

DLS

Neg. Case 1 : communication between AP and STAs

Neg. Case 2 : communication between STA and STA


May 2010

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Virtual Traffic Stream

May 2010


• Virtual Traffic Stream (VTS) supports enhanced throughput by spatial reuse

• The Probing Stage determines the TSs that are able to coexist within the same time (low or no mutual interference), then schedule them to share the same time slot

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Directivity Support

• Directivity support for 802.11ad system includes directional association and beamforming

• Directional association– Directional beacons (up to 4 beacons) and Directional contention

periods (CPs) enable STAs to associate to AP directionally

• Beamforming– Beamforming protocol is based on 11/496r0

May 2010


B B BCFP CFPDirectional CP1

Directional CP2

Directional CPn

Non-directional

CP

CP

Beacon period Beacon period

CP

Q-beacon 1 GT Q-beacon 2 GT Q-beacon n Q-beacon (Directional Quasi-omni beacon)GT (Guardtime)

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Directional Association Example• AP

– broadcasts beacons to the supported directions– determines the directional beacon interval appropriately

• STAs – scan beacons on the supported directions– associate with AP on the directional CP

67

AP STAs

D-Beacon 1

D-Beacon 2

D-Beacon n

Detect Beacon

D-Beacon 3

Directional CP

Association

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Enhanced Co-existence (1/4)- Co-existence for homogeneous systems -

• Enhanced co-existence provides co-existence among homogeneous systems and among heterogeneous systems

• Co-existence for homogeneous systems provides QoS assurance during CFP– Avoid mutual interference by overlapping homogenous

networks to data transmission during CFP

68

STAA

STAB

STAA Areain BSS A

STAB Areain BSS B

AP ofBSS B

AP ofBSS A

Mutualinterference

BCFP for STA A

CPBSS A

BCFP for STA B

CPBSS B

Mutual interference

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Enhanced Co-existence (2/4)- Co-existence for homogeneous systems -

• Co-existence action frame (CAF) supports avoiding mutual interference by overlapping homogenous networks to data transmission during CFP

– CAF includes schedule information of CFP

– STAs periodically sends out CAFs for potentially incoming homogeneous networks

– STAs scan CAFs before transmitting data during CFP

May 2010


STAA

STAB

STAA Areain BSS A

STAB Areain BSS B

CAFAP ofBSS B

AP ofBSS A

BCFP for STA A

CPBSS A

STA_B inBSS B

CAF

SCAN

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Enhanced Co-existence (3/4)- Co-existence for heterogeneous systems -

• There are two 60GHz unlicensed wireless system specifications in the IEEE 802 (802.15.3c and 802.11ad)

• A mechanism is proposed to facilitate coexistence between 802.15.3c and 802.11ad while minimizing the additional complexity in implementation

• The co-existence mechanism is based on the document 10/0231r3 (John R. Barr ）

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Enhanced Co-existence (4/4)- Co-existence for heterogeneous systems -

• To detect other 60GHz systems operating in the same channels, the BSSs in the vicinity have a quiet period to create a clear channel

• The quiet periods scheduled by different BSSs partially align to prevent the signal from adjacent BSS interfering the detection of other systems.

May 2010

Slide 71

BSS1

BSS3

BSS2

B B BBSS1 Quiet Quiet



DS

BBeacon

Quiet Quiet period

Quiet

Quiet

Quiet

AP1 requests AP2 and AP3 to align their quiet periods for interference detection


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Part3: System Evaluation

72

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Abstract• The PHY abstraction and antenna model for system

simulation are provided• Assumptions and simulation parameters are summarized

for each scenario • The following simulation are performed to show how the

proposal meets the requirements– Point to point link simulation– Home living room simulation– Office conference room simulation

73

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

PHY Abstraction and Antenna Model• PHY abstraction

– Simulation results in slides 35-52 are used for PHY abstract– The path loss model for all the scenarios defined in 0334/r7are

implemented in MAC simulations– The human blockage model defined in 0334/r7 is implemented

• Antenna model– It is assumed in MAC simulation that beam forming procedure has

been completed before data transmission– The peak gain directions of the sender STA and receiver STA are

aligned before the data transmission is started• Peak gain of the TX/RX antenna: 14dBi• Coverage range: 60 degree

74

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Scheduling Algorithm• Traffics are classified into two categories, isochronous and asynchronous

traffic – Uncompress video and lightly compressed video are considered as isochronous traffic – Hard disk file transfer, local data transfer and web browsing are considered as asynchronous

traffic • Both isochronous traffic and asynchronous traffic use CFP for data

transmission• A TS is created for each traffic and corresponding time slots are allocated

– For isochronous traffic• The time slots are allocated in each BIs until the TS is terminated

– For asynchronous traffic• The time slots are released after the end of current BI• New time slots in the following BIs need to be allocated if there is still data

waiting in the queue for transmission• EDCA is adopted to coordinate the TS allocations based on TS requests

from different STAs

75

May 2010


Access chategories Traffic

AC_VI Uncompressed video and lightly compressed video

AC_BE Hard disk file transfer and local file transfer

AC_BK Web browsing

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Part3-1: Point to Point link Simulation

•Req 01 – at least 1Gbps at MAC SAP

•Req 02 – at least 1Gbps PHY rate

•Req 03 – 1Gbps at 10 meters

76

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Simulation Parameters

77

MCSs

SC-MCS 8 2640Mbps Pi/2QPSK/LDPC

ACK policies

No-ACK Immediate-ACK Aggregation-ACK (A-ACK)

MSDU length

8KB

Aggregation

Number of Subframes 8 subframes

Length of Subframe 8KB, 128KB

IFS

MIFS 0.5us

SIFS 2.5us

Simulation Time

10 minutes

CFP and CP timing

CFP = 9ms CP = 1ms

Distance between Point and Point

10m

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Simulation Results

Goodput

SC-MCS 8 (2640Mbps,QPSK/LDPC (672, 504))

No-ACK 1.94Gbps

Imm-ACK 1.41Gbps

A-ACK (8KB) 1.86Gbps

A-ACK(128KB) 1.99Gbps

• Simulation results show the functional requirements [Req01, Req02, Req03] in point-to-point link simulation are fulfilled – Req 01: at least 1Gbps at MAC SAP

– Req 02: at least 1Gpbs PHY rate

– Req 03: 1Gbps at 10 meters

May 2010

Hiroshi Harada, NICT78

Average SNR of 14.28dB for 10m Point-to-Point link

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Part3-2: Home Living Room Simulation

• Req 04 - Uncompressed Video of 3Gbps

• Req 05 - Packet Loss Rate 1e-8

• Req 06 – Delay 10ms

79

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission


80

MCSs

SC-MCS 12 5280Mbps 16QAM/LDPC

Used ACK policies


Aggregation

Number of Subframes 8

Length of Subframe 8KB, 128KB, 1MB

IFS

MIFS 0.5us

SIFS 2.5us

Simulation Time

10 minutes

Human blockage interval

Human blockage appears every 1s

CFP and CP timing

CFP = 9.5ms CP = 0.5ms

Distance between AP and STA

2m

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

CFP Allocation for Data Transmission in Home Living Room

81

May 2010


B Video Traffic

CFP (9.5ms) CP+B (0.5ms)

Data

B Video Traffic

CFP CP

SIFS

Ack SIFS

Data SIFS

Data MIFS Data MIFS Data MIFS

DATA with ACK

DATA with No-ACK

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Simulation Results

Goodput (>1Gbps)

Delay (<10ms)

Packet Loss

SC-MCS 12 (5280Mbps,16QAM/LDPC)

No-ACK 2.98Gbps 7.0ms 0%

Imm-ACK 2.52Gbps 11.7ms 15%

A-ACK (8KB) 2.98Gbps 6.7ms 0%

A-ACK(128KB) 2.98Gbps 5.6ms 0%

A-ACK(1MB) 2.98Gbps 6.1ms 0%

May 2010


• MCS 12 with No-ACK and MCS 12 with Aggregation ACKs (A-ACKs) meet the requirements of goodput (>1Gbps), delay (<10ms) and packet loss rate (1e-8) in home living room

Average SNR of 24.77dB for 2m AP-STA

• The results of goodput, delay and packet loss rate in home blockage are given in the backup slide (A)

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Part3-2: Office Conference Room Simulation

83

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

May 2010


4.5 m

3.0 m

door

window

STA 1

STA 2

STA 3

STA 4

STA 5

STA 6

STA 7

STA 8

AP (in ceiling)

x

y

00

COMPRESSED_VIDEO・ 2 to 1

FTP( file transfer )・ 9 to 2・ 3 to 5・ 4 to 9・ 5 to 3・ 7 to 8・ 9 to 7

HTTP・ 3・ 4・ 5・ 6

doc.: IEEE 802.11-10-0498-03-00ad

Submission

CFP Allocation for Data Transmission in Office Conference Room

• Number of traffics during CFP– 1 Lightly Compressed Video traffic

– 6 FTP traffics

– 4 HTTP traffics

85

May 2010


B Video Traffic

CFP (9ms) CP+B (1ms)

Data

B

SIFS

Ack SIFS

Data SIFS

Data MIFS Data MIFS Data MIFS

DATA with ACK

DATA with No-ACK

FTP 1 ... FTP 6 HTTP 1 ... HTTP 4

doc.: IEEE 802.11-10-0498-03-00ad

Submission


86

MCSs

SC-MCS 3 1650Mbps BPSK/RS

Used ACK policies


Aggregation

Number of Subframes 8

Length of Subframe 8KB, 128KB, 1MB

IFS

MIFS 0.5us

SIFS 2.5us

Simulation Time

10 minutes

Human blockage interval

-

CFP and CP timing

CFP = 9ms CP = 1ms

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Result for Office Conference RoomThis result shows the performance of FTP and HTTP traffic when the

video traffic is satisfied the requirements of goodput (600Mbps) and delay (<10ms) on SC-MCS3

87

Goodput Delay (10ms)

Packet Loss

TS allocation

SC-MCS 3 (1650Mbps, BPSK/RS)

Video traffic

No-ACK 0.6Gbps 2.7ms 0% 4.4ms

Imm-ACK 0.6Gbps 2.5ms 0% 5.1ms

A-ACK (8KB) 0.6Gbps 2.8ms 0% 4.2ms

FTP traffic

No-ACK 23.4Mbps 10ms 0% 2.6ms

Imm-ACK 25.5Mbps 9.9ms 0% 4.7ms

A-ACK (8KB) 24.4Mbps 10ms 0% 2.2ms

HTTP traffic

No-ACK 0.637Mbps 10.1ms 0% 0.04ms

Imm-ACK 0.624Mbps 11.9ms 0% 0.1ms

A-ACK (8KB) 0.638Mbps 10.3ms 0% 0.07ms

May 2010


Addition simulation results are shown in the backup slide (B)

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Part4: PAR, FRD and EVM declaration

88

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

PAR and FRD declaration

89

May 2010


ID Subclasue of FRD

Requirement Declaration

FRD.1 2.1.1 Maximum throughput

[Req01] Slide 78 show simulation results that the complete proposal achieves a maximum throughput of at least 1 Gbps, as measured at the MAC SAP.

[Req02] Slide 13 show that MCS 3 shall be mandatory for all the devices. MCS 3 provides a PHY rate of 1.650 Gbps.

The PHY performance are shown in slides 35-52.

FRD.2 2.1.2 Range [Req03] Slide 78 show simulation results that the complete proposal achieves a range of at least 10 m at 1 Gbps, as measured at the MAC SAP, in a NLOS channel.

FRD.3 2.1.3 Video requirements

[Req04] Slide 82 show simulation results for uncompressed video where the required application data rate of 3 Gbps is achieved at the MAC SAP by the complete proposal.

[Req05] Slide 82 show simulation results for uncompressed video where the packet loss rate is below 1e-8 for a 8Kbyte payload size.

[Req06] Slide 82 show simulation results for uncompressed video where the delay is below 10ms.

doc.: IEEE 802.11-10-0498-03-00ad

Submission

PAR and FRD declaration (cont.)

90

May 2010


ID Subclasue of FRD

Requirement Declaration

FRD.4 2.2 Fast session transfer

[Req07] 10/499r1 describes multi-band operation

FRD.5 2.3 Coexistence [Req08] Slides 68-70 describe the mechanisms to enable coexistence with other systems in the band, including 802.15.3c.

FRD.6 2.4 802.11 user experience

[Req09] Slide 56 of the complete proposal describes that the network architecture of 802.11 is fully maintained.

[Req10] Slide 56 of the complete proposal describe that the proposal is fully backward compatible with the 802.11 management plane. The MLME is fully reused.

FRD.7 [Req11] The PICS is defined in Annex A of the complete proposal.

doc.: IEEE 802.11-10-0498-03-00ad

Submission

EVM Declaration

91

May 2010


ID Subclasue of EVM DeclarationEVM.1 2.1 Point-to-point link simulations Slides 76-78

EVM.2 2.2 Link budget parameters for FR Section 2.1.2 (range requirement – Req03)

Slides 76-78

EVM.3 2.3 Coexistence for FR Section 2.3 Slides 68-70

EVM.4 3 PHY Performance Slides 31-52

EVM.5 4 System evaluation Slides 72-78

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Conclusion• This document proposes the PHY and MAC layer design for 802.11ad

operating in the 60GHz band• PHY layer design

– A hybrid PHY designed consisting of the SC PHY and the OFDM PHY is proposed– Channelization of the 60GHz band is presented– Data rate modes of respective PHYs are listed

– Common Mode Signaling bridging across two PHYs is introduced– Frame format for respective PHYs are presented

• MAC layer design– Proposed MAC contains Basic MAC and Enhanced MAC

– Basic MAC is based on 802.11-2007 and other amendments to support 802.11 user experience

– Enhanced MAC is designed to achieve very high throughput (>1Gbps), directivity support, coexistence with other 60GHz systems and QoS improvement

• PAR, FRD and EVM declaration is provided

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Backup (A) : Home Living Room(with human blockage)

May 2010


Goodput (>1Gbps) Delay (10ms) Packet Loss

SC-MCS 12 (5280Mbps,16QAM/LDPC)



A-ACK (8KB) 2.35Gbps 12.6ms 20%

A-ACK(128KB) 2.36Gbps 12.1ms 20%

A-ACK(1MB) 2.35Gbps 12.2ms 20%

• SNR taking into account human blockage that appears every 1s

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Backup (B) : Office Conference Room (1/2)Goodput, Delay and Packet Loss per Link

Goodput [Mbps] MSDU Delay [msec] Packet Loss Ratio [%]

SC-MCS 3 (1650Mbps, BPSK/RS)BLOCK_ACK(8K) 0

FTP AP->STA2 25.681082 10.352 0

FTP AP->STA7 25.679368 10.347 0

FTP STA3->STA5 22.422177 10.103 0

FTP STA4->AP 25.680234 10.356 0

FTP STA5->STA3 21.612784 10.18 0

FTP STA7->STA8 25.681078 9.608 0

HTTP STA3->AP 362.271 10.555 0

HTTP STA4->AP 534.839 10.707 0

HTTP STA5->AP 1541.67 9.906 0

HTTP STA6->AP 113.747 10.23 0

VIDEO STA2->STA1 600.822784 2.856884 0

IMM_ACK

FTP AP->STA2 25.677746 9.887 0

FTP AP->STA7 25.677737 9.878 0

FTP STA3->STA5 25.330256 10.193 0

FTP STA4->AP 25.67519 9.878 0

FTP STA5->STA3 25.333668 10.174 0

FTP STA7->STA8 25.679447 9.91 0

HTTP STA3->AP 356.445 11.775 0

HTTP STA4->AP 524.311 13.879 0

HTTP STA5->AP 1504.711 12.096 0

HTTP STA6->AP 112.509 10.193 0

VIDEO STA2->STA1 600.822533 2.509467 0

NO_ACK

FTP AP->STA2 25.681098 10.236 0

FTP AP->STA7 25.679385 10.242 0

FTP STA3->STA5 19.05997 10.057 0

FTP STA4->AP 25.680246 10.241 0

FTP STA5->STA3 18.738945 9.925 0

FTP STA7->STA8 25.681094 9.696 0

HTTP STA3->AP 363.137 9.914 0

HTTP STA4->AP 532.078 10.385 0

HTTP STA5->AP 1539.905 10.297 0

HTTP STA6->AP 113.59 10.068 0

VIDEO STA2->STA1 600.82274 2.771126 0

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Backup (B) : Office Conference Room (2/2)Goodput, Delay and Packet Loss in Human Blockage

• Human blockage occurs every 1s

May 2010


Goodput Delay (10ms) Packet Loss

SC-MCS 3 (1650Mbps, BPSK/RS)

Video traffic



A-ACK (8KB) 0.6Gbps 2.8ms 0%

FTP traffic

No-ACK 18.2Mbps 10.1ms 0%

Imm-ACK 20.4Mbps 10.2ms 0%

A-ACK (8KB) 19.1Mbps 10.4ms 0%

HTTP traffic

No-ACK 0.768Mbps 10.1ms 0%

Imm-ACK 0.753Mbps 11.9ms 0%

A-ACK (8KB) 0.770Mbps 10.1ms 0%

doc.: IEEE 802.11-10-0498-03-00ad

Submission

Reference1. Function requirements: 11-09-0228-05-00ad-functional-requirements

2. Channel model document: 11-09-0334-07-00ad-channel-models-for-60-ghz-wlan-systems

3. Evaluation methodology: 11-09-0296-16-00ad-evaluation-methodology

May 2010


doc.: IEEE 802.11-10-0498-03-00ad

Submission

Strawpoll

• “Do you support adopting the whole or part of the complete proposal in 10/0498r0 as the material to create the first draft of the TGad amendment?”– Yes, No, Abstain

97

May 2010

doc.: ieee 802.11-10-0498-03-00ad submission may 2010 hiroshi harada, nictslide 1 complete proposal...

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