1. doc.: IEEE 802.11-12/0597r0 Submission May 2012 Hongyuan Zhang, et. Al.Slide 1 Editorial Change on SIG Field Date: 2012-05-15 Authors:

2. doc.: IEEE 802.11-12/0597r0 SubmissionHongyuan Zhang, et al Authors continued: Slide 2 May 2012

3. doc.: IEEE 802.11-12/0597r0 SubmissionHongyuan Zhang, et. Al.Slide 3 Authors continued: May 2012

4. doc.: IEEE 802.11-12/0597r0 Submission Discussions [1] proposed to revise 2MHz SIG field from 52 data tones to 48 data tones. However the current spec framework has the following statement in R.3.2.1.1.B : –“Omni Portion LTF1 and SIG field both have 52 data tones. –Different from the legacy portion of 11n MM preamble and 11ac preamble.” Need to correct the mistake on SIG field number of data tones in the MU (long) preamble. Need to specify that the LTF1 field in omni portion has the same LTF sequence value as those used in the short preamble. March 2012 Hongyuan Zhang, et. Al.Slide 4

5. doc.: IEEE 802.11-12/0597r0 Submission Motion-1 Move to conduct the following revision in the spec framework. –R.3.2.1.1.A… ….. LTF Fields –Define the 11ah LTF signs for >= 2MHz PPDUs the same as the VHTLTF signs in the corresponding 11ac packets with the same FFT sizes. This is also applicable to the LTF1 and D-LTFs fields in the long preamble format. ….. –R.3.2.1.1.B….. ….. Omni Portion a.LTF1 and SIG field both have 52 data tones. Different from the legacy portion of 11n MM preamble and 11ac preamble. –a. SIGA field has 48 data tones, occupying tones {-26:26} as in 11n/11ac SIG fields May 2012 Hongyuan Zhang, et. Al.Slide 5

6. doc.: IEEE 802.11-12/0597r0 Submission Reference [1] 11-12-0308-02-00ah-revisit-2mhz-sig-field March 2012 Hongyuan Zhang, et. Al.Slide 6