1. doc.: IEEE 802.11-15/0716r6 Submission PHY SIG Frame Structure for IEEE 802.11aj (45GHz) Authors/contributors: Date: 2015-05 Presenter: Shiwen HE May 2015 Shiwen He, Haiming Wang Slide 1

2. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 2 Abstract The proposal presents physical layer SIG structure for IEEE 802.11 aj (45GHz) in millimeter-wave WLAN communication.

3. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 3 Background Challenges of future WLAN –Limited spectrum resources –High-speed data requirements Features of future WLAN –Large bandwidth –Multiple channel mode –Multi-user –Multi-stream 45GHz millimeter-wave communication –Digital home appliances –Ultra-high-speed (10Gbps) wireless applications

4. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 4 Technology Objects The SIG frame structure try to achieve the following technical goals –Dynamic bandwidth –Multi-stream –Energy efficiency –Scrambler –Single-carrier & Multi-carrier compatible Dynamic bandwidth Achieving dynamically channel bandwidth selection for 1080MHz BSS to enhance the adaptability in different channel environments and improve spectral efficiency.

5. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 5 Technology Objects Multi-stream Achieve a multi-stream control to obtain the multiplexing gain. Energy efficient communication Achieve energy efficient communication, i.e., allow non-AP STAs in TXOP power save mode to enter Doze state during a TXOP Scrambler Scrambling effectively reduces the PAPR in OFDM system Single-carrier & Multi-carrier Support single-carrier and multi-carrier simultaneously

6. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 6 QMG PHY SIG Structure

7. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 7 Explanation of each field in SIG  Scrambler BitFieldsNumber of Bits Description B0-B6Scrambler Initialization7The initial scrambler state. B7Short GI1Set to 0 if short guard interval is not used in the Data field. Set to 1 if short guard interval is used in the Data field. B8Uplink Indication1Set to the value of the TXVECTOR parameter UPLINK_INDICATION. B9-B17PAID9If Uplink Indication is not present or set to 1, set to the value of the TXVECTOR parameter PARTIAL_AID. PARTIAL_AID provides an abbreviated indication of the intended recipient(s) of the PSDU (see 9.20a (Group ID, partial AID, Uplink Indication and COLOR in S1G PPDUs))). If Uplink Indication is set to 0, B7-B9 are set to the value of the TXVECTOR parameter COLOR and B10-B15 are set to the value of B18-B35Length18Number of data octets in the PSDU, Range 0- 262143;

8. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 8 Explanation of each field in SIG  Dynamic bandwidth B36-B39Last RSSI4For SC/OFDM PHY: Contains a copy of the parameter LAST_RSSI from the TXVECTOR. When set to 0, this field is reserved and ignored by the receiver. The value is an unsigned integer: —Values of 2 to 14 represent power levels (– 71+value×2) dBm. —A value of 15 represents a power greater than or equal to –42 dBm. —A value of 1 represents a power less than or equal to –68 dBm. Value of 0 indicates that the previous packet was not received a SIFS period before the current transmission. For CPHY, SC/OFDM MIMO PHY: Reserved. B40DB1For OFDM PHY: If the PPDU is transmitted on 1080MHz channel: set Dynamic Bandwidth to 1 for allowing dynamic bandwidth; set to 0 for non- allowing dynamic bandwidth. Otherwise set to 0; (Reserved) For CPHY, SC PHY: Reserved.

9. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 9 Explanation of each field in SIG  Continued BitFieldsNumber of BitsDescription B41-B42Spreading Factor/Aggregation/ Additional PPDU 2For CPHY: Set to 0: spreading by 13 Set to 1: spreading by 7 Set to 2: spreading by 4 Set to 3: no spreading For SC/OFDM PHY: Aggregation: Set to 1 indicate that the PPDU in the data portion of the packet contains an A-MPDU; otherwise, set to 0. Additional PPDU: Contains a copy of the parameter ADD-PPDU from the TXVECTOR. A value of 1 indicates that this PPDU is immediately followed by another PPDU with no IFS or preamble on the subsequent PPDU. A value of 0 indicates that no additional PPDU follows this PPDU.

10. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 10 Explanation of each field in SIG  Continued BitFieldsNumber of BitsDescription B43-B47Training Length5For SC/OFDM PHY: Corresponds to the TXVECTOR parameter TRNLEN. If the Beam Tracking Request field is 0, the Training Length field indicates the length of the training field. The use of this field is defined in 21.10.2.2.3. A value of 0 indicates that no training field is present in this PPDU. If the Beam Tracking Request field is 1 and the Packet Type field is 10, the Training Length field indicates the length of the training field. If the Packet Type field is 11, the Training Length field indicates the length of the training field requested for receive training. For CPHY: Reserved. B48Beam Tracking Request1Corresponds to the TXVECTOR parameter BEAM_TRACKING_REQUEST. Set to 1 to indicate the need for beam tracking (9.35.7); otherwise, set to 0. The Beam Tracking Request field is reserved when the Training Length field is 0.

11. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 11 Explanation of each field in SIG  Energy Efficiency BitFieldsNumber of BitsDescription B49Codeword Length1Set to 0 indicate that the codeword length is 672; Set to 1 indicate that the codeword length is 2016; B50TXOP_PS_NOT_ALLOWED1Set to 0 by QMG AP if it allows non-AP QMG STAs in TXOP power save mode to enter Doze state during a TXOP. Set to 1 otherwise. The bit is reserved and set to 1 in QMG PPDUs transmitted by a non-AP QMG STA. B51-B55MCS5Index into the Modulation and Coding Scheme table. B56-B57Packet Type2When the Training Length field is nonzero, corresponds to the TXVECTOR parameter PACKET-TYPE. —Packet Type = 11 indicates either a packet whose data part is followed by one or more TRN-R subfields, or a packet that is requesting TRN-R subfields to be appended to a future response packet. —Packet Type = 10 indicates a packet whose data part is followed by one or more TRN-T subfields. When the Training Length field is zero and Packet Type = 01 indicates that PPDU is a sounding PPDU. This field is reserved when the Training Length field is zero and Packet Type = 00.

12. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 12 Explanation of each field in SIG  Multi-stream BitFieldsNumber of BitsDescription B58-B59STBC2For CPHY: Reserved. For SC/OFDM PHY ： Set to 00 to indicate no STBC. Set to 01 if Alamouti STBC is used. Set to 10 if QSTBC is used. Otherwise set to 11. B60-B61NSS2Set to 0 for 1 spatial stream. Set to 1 for 2 spatial streams. Set to 2 for 3 spatial streams. Set to 3 for 4 spatial streams.. B62Turnaround1As defined in Table 21-1. B63Reserved1Reserved. B64-B79CRC16QMG SIG check sequence. Definition of this field calculation is in 26.3.7. Note 1--A value of 0 in the QMG Length field indicates a PPDU that does not include a data field, i.e., NDP. NDP transmissions are used for sounding purposes only (see 9.21.2). The packet ends after the last QMG MCTF or the QMG SIG.

13. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 13 Conclusion A common SIG was proposed to simultaneously support multiple carrier mechanism for IEEE 802.11aj (45G) millimeter-wave communication.

14. doc.: IEEE 802.11-15/0716r6 Submission May 2015 Shiwen He, Haiming Wang Slide 14 Thanks for Your Attention.