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SIG field Overload indication to support NDP Frames

SIG field Overload indication to support NDP Frames. Authors:. Date: 2012-11-12. Slide 1. Slide 2. Slide 3. Overview. Extend (11ah) supports early indication of frames types in SIG field

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SIG field Overload indication to support NDP Frames

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  1. SIG field Overload indication to support NDP Frames Authors: Date: 2012-11-12 Slide 1

  2. Slide 2

  3. Slide 3

  4. Overview • Extend (11ah) supports early indication of frames types in SIG field • The early indication bit(s) indicates the SIG field is re-defined (overloading) for the NDP frame. (Disclaimer – the list below may grow) • Currently there are 6 (and may be more later) type of frames. • Control frames • 4.4.2.1 Short ACK frame format • 4.4.2.2 Short Block Ack (BA) frame format • 4.4.2.3 Short CTS frame format • 4.4.2.4 NDP PS-Poll frame format • Management Frames • 4.4.1.2 NDP Probe Request frame format • 4.4.1.3 Short Beamforming Report Poll frame format

  5. Proposal • Previously, it was thought that unused MCS indices in SIG field can be used to indicate NDP frames • MCS 11-15 • But there is not even enough indices for all the NDP frames defined in the current specification • Propose to define a bit in SIG field for early indication of NDP frames • There are three reserved bits in the 1Mhz SIG field and more in the 2Mhz SIG field • A subtype field determines the number of NDP frames will be discussed later

  6. 1 MHz SIG Field MediaTek

  7. Motion • Approved: To have have one bit in the SIG field to indicate a frame is NDP frame? • Yes • No • Abstain

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