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Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working...

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doc.: IEEE c Submission Slide 3 April, 2008 NICT SCAN Comments are shown in the next page SCAV-OFDM SCAN CHs4 CHs (appendix A)12 LRP CHs (appendix A) SCAN Procedure- SCAN by Omni /Quasi- Omni beams (The number of Quasi-omni beams is upto 4) SCAN by Omni SCAN informationChannelRatingList Piconet detectionBy beacon of base (common) rate – LRP1 (50Mbps) By beacon of base rate (TBD) Channel Switching Time (pPHYChannelSwitchTi me) 100us1000us Channel clear assessment (CCA) time 5us9us
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doc.: IEEE 802.15-08-0240- 00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Questions/Comments on AV-OFDM MAC] Date Submitted: [April 16, 2008] Source: [Chang woo Pyo, Zhou Lan, Fumihide Kojima, Tuncer Baykas, Chin Sean Sum, Junyi Wang, Azizur Rahman, Hiroyuki Nakase, Hiroshi Harada, Shuzo Kato] Company [National Institute of Information and Communications Technology (NICT)] Address 1 [3-4 Hikari-no-oka, Yokosuka-shi, Kanagawa 239-0847, Japan] Voice 1 :[+81-46-847-5074] , FAX 1 : [+81-46-847-5440] E-Mail[] Re: [In response to TG3c Call for Proposals (IEEE P802.15-07-0586-02- 003c)] Abstract: [Questions/Comments on AV-OFDM MAC] Purpose: [To be considered in TG3C baseline document.] 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 contributors acknowledge and accept that this contribution becomes the property of IEEE and may be made publicly available by P802.15.
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Page 1: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 1

April, 2008

NICT

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Submission Title: [Questions/Comments on AV-OFDM MAC]Date Submitted: [April 16, 2008]Source: [Chang woo Pyo, Zhou Lan, Fumihide Kojima, Tuncer Baykas, Chin Sean Sum, Junyi Wang, Azizur Rahman, Hiroyuki Nakase, Hiroshi Harada, Shuzo Kato] Company [National Institute of Information and Communications Technology (NICT)]Address1[3-4 Hikari-no-oka, Yokosuka-shi, Kanagawa 239-0847, Japan]Voice1:[+81-46-847-5074] , FAX1: [+81-46-847-5440]E-Mail[]Re: [In response to TG3c Call for Proposals (IEEE P802.15-07-0586-02-003c)]Abstract: [Questions/Comments on AV-OFDM MAC]Purpose: [To be considered in TG3C baseline document.]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 contributors acknowledge and accept that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

Page 2: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 2

April, 2008

NICT

Summary• Identify the “need-to-clarify” items in AV-

OFDM

Page 3: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 3

April, 2008

NICT

SCAN• Comments are shown in the next page

SC AV-OFDMSCAN CHs 4 CHs (appendix A) 12 LRP CHs (appendix

A)

SCAN Procedure - SCAN by Omni /Quasi-Omni beams (The number of Quasi-omni beams is upto 4)

SCAN by Omni

SCAN information ChannelRatingList ChannelRatingList

Piconet detection By beacon of base (common) rate – LRP1 (50Mbps)

By beacon of base rate (TBD)

Channel Switching Time (pPHYChannelSwitchTime)

100us 1000us

Channel clear assessment (CCA) time

5us 9us

Page 4: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 4

April, 2008

NICT

Comments for AV-OFDM (related to SCAN)

• Comment 1– Which channel is used to scan in LRP channels (LRP1, LRP2, or

LRP3)

• Comment 2– What is the definition of omni - covering 360 degree or part of 360

degree– If omni is covering the part or 360 degree, how many directions are

supported by each device

• Comment 3– What is the definition of base rate of beacon

• Comment 4– The reason of channel switching time of 1000us and CCA time of 9us

Page 5: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 5

April, 2008

NICT

Starting a piconet• Comments are shown in the next page

SC AV-OFDMChannel Selection

With least amount of interference defined in 802.15.3b

Implementation dependent

Superframe 1. Beacon : - Upto 4 Omni/Quasi-omni

beacons (Directional beacons)- Base (common) rate – LRP1

1. Beacon : - Omni beacon- Base rate (TBD)

2. CAP : - Control signals for the same rate of beacon (base rate)- Data for any other rate- Sub-CAPs for multiple Quasi-omni beacons

2. CAP - 4 LRP rates (2.5, 3.8, 5.1, and 10.2Mbps)

3. CTAP : All available rates 3. CTAP : HRP, LRPs and directional LRPs

Superframe resolution

1us 1us

Page 6: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 6

April, 2008

NICT

Comments for AV-OFDM (related to starting a piconet)

• Comment 5– The reason of channel selection not complying with

15.3• Comment 6

– Does AV-OFDM support directional beacons • Comment 7– What is the date rate for beacon (related to comment 2)

• Comment 8– What data rates are supported in CAP

Page 7: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 7

April, 2008

NICT

Association• Comments are shown in the next page

SC AV-OFDMPNC-DEV Association

Association in CAP Association in CAP

Base (common) rate for association

Base rate (TBD) for association

Qmni/Quasi-Omni antenna Omni antenna

DEV-DEV Association

Association in CTAP -

Base (common) rate -

Omni/Quasi-Omni antenna -

Page 8: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 8

April, 2008

NICT

Comments for AV-OFDM (related to Association)

• Comment 9– What data rate is used for association

• Comment 10– AV-OFDM is no procedure of DEV-DEV

association

Page 9: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 9

April, 2008

NICT

Beamforming• Comments are shown in the next page

SC AV-OFDM

Beamforming Ant.

Beamforming Ant. or Sectorized Ant.

Beamforming Ant. or upto 8 directional Ant.

Beamforming operations

PNC and DEV beamforming PNC and DEV beamforming

DEV and DEV beamforming No description for DEV and DEV beamforming

PNC and DEV beamforming

- Beamforming in CTA- Symmetric/Asymmetric

Tx/Rx ant. beamforming support

- Periodical beam-tracking

-Omni beacon only-RX diversity training field in preamble

DEV and DEV beamfoming

- Beamforming in CTA- Symmetric/Asymmetric

Tx/Rx ant. beamforming support

- Periodical beam-tracking

?

Page 10: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 10

April, 2008

NICT

Comments for AV-OFDM (related to Beamforming)

• Comment 11– What is the difference between beamforming antenna and

directional antenna

• Comment 12– What is the function of RX diversity field in preamble

• Comment 13– Does AV-OFDM support symmetric and asymmetric Tx and Rx

ant. in beamforming

Page 11: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 11

April, 2008

NICT

Channel probing• Comments are shown in the next page

SC AV-OFDMChannel probing Optional function ?

Channel probing operations

PNC to DEV and DEV to DEV channel probing in CTA

In CTA ?

Data used for measurement

Regular data frame ?

Way to feedback MAC header of Imm-ACK or Dly-ACK

Channel probing response command ?

Channel status information

RSSIr, SINR, Suggested CES length, FER

RSSI, SNR, recommended PHY mode

Page 12: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 12

April, 2008

NICT

Comments for AV-OFDM (related to channel probing)

• Comment 14– Does AV-OFDM support channel probing – If support, how to perform channel probing

Page 13: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 13

April, 2008

NICT

Streaming• Comments are shown in the next page

SC AV-OFDMStreaming in SF CTAP CTAP

Maximum frame size

8M octets 7M octets for HRP,4K octets for LRP

Minimum fragment size

512 octets TBD

Aggregation - Option- Maximum subframe size for

aggregation = 1M octets- Available number of aggregated

subframes = 8- Two types of aggregation support 1) Standard aggregation 2) low latency aggregation

- Option- Maximum subframe size for aggregation = 1M octets- Available number of aggregated subframes = 7

Block ACK - Retransmission of aggregated subframes

- ACK group (usage of ACK group is TBD)

Directional ACK ACK is the same data rate of stream Directional ACK (Directional LRP)

Page 14: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 14

April, 2008

NICT

Comments for AV-OFDM (related to streaming)

• Comment 15– What is the value for the minimum fragment size

• Comment 16– What is the definition of ACK group

• Comment 17– Details of retransmission procedure in AV-OFDM

• Comment 18– What is the data rate for directional ACK

• Comment 19– The reason of directional ACK not complying to 15.3b

• ACK information of directional ACK is included in header not payload

Page 15: Doc.: IEEE 802.15-08-0240-00-003c Submission Slide 1 April, 2008 NICT Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission.

doc.: IEEE 802.15-08-0240-00-003c

Submission Slide 15

April, 2008

NICT

Appendix: Channel IndexSC AV-OFDM

CHNL_ID Channel index CHNL_ID HRP Channel Index

LRP Channel Index

1 CH1 1 HRP1 LRP1

2 CH2 2 HRP2 LRP1

3 CH3 3 HRP3 LRP1

4 CH4 4 HRP4 LRP1

5 HRP1 LRP2

6 HRP2 LRP2

7 HRP3 LRP2

8 HRP4 LRP2

9 HRP1 LRP3

10 HRP2 LRP3

11 HRP3 LRP3

12 HRP4 LRP3


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