Doc.: IEEE 802.11-13/0509r0 SubmissionSlide 1 Short Management and Short A-MSDU Frame Date:...

doc.: IEEE 802.11-13/0509r0

Submission Slide 1

Short Management and Short A-MSDU FrameDate: 2013-05-12

Authors:

Liwen Chu, ST

May 2013

Name Affiliations Address Phone email Liwen Chu STMicroelectronics Minyoung Park Intel Corp. [email protected]

Tom Tetzlaff Intel Corp. [email protected]

Emily Qi Intel Corp. [email protected]

Su Khiong Yong Marvell [email protected]

Hongyuan Zhang Marvell [email protected]

Sudhir Srinivasa Marvell [email protected]

Yongho Seok LG Electronics +82-31-450-1947 [email protected]

Jinsoo Choi LG Electronics

Jeongki Kim LG Electronics

HanGyu Cho LG Electronics

Matthew Fischer Broadcom +1 408 543 3370 [email protected]

Eric Wong Broadcom [email protected]

Rojan Chitrakar Panasonic [email protected]

Ken Mori Panasonic [email protected]

doc.: IEEE 802.11-13/0509r0

Submission Slide 2

May 2013

Liwen Chu, ST

Name Affiliations Address Phone email Simone Merlin Qualcomm 5775 Morehouse Dr,

San Diego, CA 8588451243 [email protected]

Alfred Asterjadhi Qualcomm

Amin Jafarian Qualcomm

Santosh Abraham Qualcomm

Bin Tian Qualcomm

George Cherian Qualcomm

Menzo Wentink Qualcomm

Hemanth Sampath Qualcomm

VK Jones Qualcomm

Sun, Bo ZTE [email protected]

Lv, Kaiying ZTE [email protected]

Huai-Rong Shao Samsung [email protected]

Chiu Ngo Samsung [email protected]

Minho Cheong ETRI 138 Gajeongno, Yuseong-gu, Dajeon, Korea

+82 42 860 5635

[email protected]

Jae Seung Lee ETRI [email protected]

Hyoungjin Kwon ETRI [email protected]

Jaewoo Park ETRI [email protected]

Sok-kyu Lee ETRI [email protected]

Sayantan Choudhury Nokia 2075 Allston Way, Suite 200, Berkeley, CA 94704

+1 510 599 9268 [email protected]

Klaus Doppler Nokia

Chittabrata Ghosh Nokia

Esa Tuomaala Nokia

doc.: IEEE 802.11-13/0509r0

Submission Slide 3

May 2013

Liwen Chu, ST

Name Affiliations Address Phone email Shoukang Zheng I2R 1 Fusionopolis Way, #21-01

Connexis Tower, Singapore 138632

+65-6408 2000 [email protected]

Haiguang Wang I2R [email protected] Wai Leong Yeow I2R [email protected] Zander Lei I2R [email protected] Yuan Zhou I2R [email protected] George Calcev Huawei Rolling Meadows,

IL USA [email protected]

Osama Aboul Magd Huawei [email protected]

Young Hoon Kwon Huawei [email protected]

Betty Zhao Huawei [email protected]

David Yangxun Huawei [email protected]

Bin Zhen Huawei [email protected]

ChaoChun Wang MediaTek [email protected]

James Wang MediaTek [email protected]

Jianhan Liu MediaTek [email protected]

Vish Ponnampalam MediaTek [email protected]

James Yee MediaTek [email protected]

Thomas Pare MediaTek [email protected]

Kiran Uln MediaTek [email protected]

Anna Pantelidou Renesas Mobile

Juho Pirskanen Renesas Mobile

Timo Koskela Renesas Mobile

Liwen Chu STMicroelectronics

George Vlantis STMicroelectronics

doc.: IEEE 802.11-13/0509r0

Submission

Slide 4 Liwen Chu, ST

Short Data/Management Frame in [1]• Some fields in frame header are removed from short MAC data frame.

• Some fields in frame header are shortened in short MAC data frame.

• Issue: A-MSDU encapsulation of short data frames is missing.

• Issue: It is not clear whether management frame can be compressed.

FC RA (MAC Address) TA (MAC Address) Sequence Control FCS

2B 6B 6B 2B 4B

Body

variable

FC

Body FCS

4Bvariable

A3 (Optional Present)

6B

Sequence Control

2B

A2 (AID)

2B

A1(BSSID/RA)

6B

FC“From DS”=0

2B

Body FCS

4Bvariable

A3 (Optional Present)

6B

Sequence Control

2B

A2 (BSSID)

6B

A1 (AID)

2B

FC“From DS”=1

2B

Short frame with AID

Short frame without AID

May 2013

doc.: IEEE 802.11-13/0509r0

Submission Liwen Chu, STSlide 5

Data and Management Frame in 802.11• Data and Management frame formats are similar. So the short frame

format can be used for decreasing management frame overhead also.• 4-bit Type subfields can be used to differentiate the short data frames

from the short management frames.

May 2013

Body FCS

4Bvariable

Sequence Control

6B

Address 2

6B

Address 1

6B

Duration

2B

FC

2B

Address 3

2B

HT Control

4B

Body FCS

4BvariableSequence Control

6B

Address 2

6B

Address 1

6B

Duration

2B

FC

2B

Address 3

2B

HT Control

4B

QoS Control

2B6B

Address 4

Management

Data

doc.: IEEE 802.11-13/0509r0

Submission

A-MSDU in 802.11• MSDUs from different SA, DA can be encapsulated in one A-MSDU.

• A-MSDU can be used for AP forwarding.


May 2013

To DS From DS Address 1 Address 2 Address 3 (Basic A-MSDU Case)

Address 4 (Basic A-MSDU Case)

0 0 RA = DA TA = SA BSSID N/A

0 1 RA = DA TA = BSSID BSSID N/A

1 0 RA = BSSID TA = SA BSSID N/A

1 1 RA TA BSSID BSSID

A-MSDU Subframe 1 A-MSDU Subframe 2 A-MSDU Subframe n

DA SA Length MSDU

6 6 2 0 to 3

Padding

variableOctets:

A-MSDU Structure

A-MSDU Subframe Structure

AP

STA1 STA2 STA3

Addresses in A-MSDU frame of STA1 to AP: RA=BSSID, TA=STA1, A3=BSSID, {SA=STA1, DA=Outside MAC or STAi in the BSS}Addresses in A-MSDU frame of AP to STA1: RA=STA1, TA=BSSID, A3=BSSID, {SA=Outside MAC or STAi in the BSS, DA=STA1}

doc.: IEEE 802.11-13/0509r0

Submission

Short A-MSDU in 802.11• MSDUs from the same SA, DA are in one short A-MSDU.

• The Short A-MSDU subframe structure is used only between a pair of STAs that communicate directly.


May 2013

To DS From DS Address 1 Address 2 Address 3 (Short A-MSDU Case)

Address 4 (Short A-MSDU Case)

0 0 RA = DA TA = SA BSSID N/A

0 1 RA = DA TA = BSSID SA N/A

1 0 RA = BSSID TA = SA DA N/A

1 1 RA TA DA SA

A-MSDU Subframe 1 A-MSDU Subframe 2 A-MSDU Subframe n

A-MSDU Structure

Length MSDU

2 0 to 3

Padding

variableOctets:

DMG short A-MSDU Subframe Structure

doc.: IEEE 802.11-13/0509r0

Submission

11ah Short A-MSDU Consideration

• 4 different addresses are required in relay operation.

• Duplicate MAC addresses in the A-MSDU subframe can be removed.

• The negotiated MAC address can be removed from the A-MSDU PPDU.

• 11ad short A-MSDU is less useful here because of lower throughput requirement of 11ah applications.


May 2013

AP

Relay STA

STA1 STA3STA2

Source MAC Address (Out_Dev)

Destination MAC Address

Destination MAC Address (Out_Dev)

Source MAC Address

RA=Relay_STATA=APDA=STA1SA=Out_Dev

RA=STA1TA=Relay_STASA=Out_Dev

RA=Relay_STATA=STA1DA=Out_Dev

RA=APTA=Relay_STADA=Out_DevSA=STA1

doc.: IEEE 802.11-13/0509r0

Submission

Dynamic A-MSDU Format• One or both of the SA, DA from an A-MSDU subframe which are same as the

addresses in frame header or are negotiated between the transmitter and the receiver

• Presence of DA/SA is indicated with DA/SA Present bits in Subframe Control field– Enables dynamic indication of different DA(SA) for each A-MSDU subframe

• Relays can aggregate multiple MSDUs from/to different SA/DA and indicate it for each MSDU if DA(SA) is different from A3/A4 of MAC Header

• Short A-MSDU format is used in short frame

• 14 bits for Length field are sufficient for current Max MSDU length (2304 octets)– Can indicate up to 16384 octets of maximum MSDU length


May 2013

Octets: 2 6 6 0-2304 0-3

Subframe Control DA SA MSDU Padding

B0-B13 B14 B15

Length DA Present SA Present

A-MSDU subframe 1 A-MSDU subframe 2 … A-MSDU subframe n

doc.: IEEE 802.11-13/0509r0

Submission

Straw Poll 1• Do you agree to include in 802.11ah SFD the AID and MAC address based

short management frame with the management indication in FC TBD?

Yes

No

Abstain

Liwen Chu, ST

May 2013

doc.: IEEE 802.11-13/0509r0

Submission

Straw Poll 2• Do you agree to include in 802.11ah SFD that in an A-MSDU the transmitter

may remove one or both of the SA, DA from an A-MSDU subframe which are same as the addresses in frame header or are negotiated between the transmitter and the receiver with A-MSDU format as described in slide 9?

Yes

No

Abstain

Liwen Chu, ST

May 2013

doc.: IEEE 802.11-13/0509r0

Submission

Reference[1] 11-11/1137r13 Proposed Specification Framework for TGah.

Liwen Chu, ST

May 2013

Doc.: IEEE 802.11-13/0509r0 SubmissionSlide 1 Short Management and Short A-MSDU Frame Date:...

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