Thoughts on Extended Range Preamble in IEEE 802.11-20/1132r0 Document
Explore the discussion on introducing Extended Range (ER) preamble for IEEE 802.11-20/1132r0, focusing on forward compatibility and the design aspects of the ER preamble. The document outlines considerations for defining ER preamble in R1, emphasizing the interpretation and classification of ER signals for future compatibility. Presented examples highlight the design elements of the ER preamble based on 11ax standards, urging for more deliberation in R2 discussions.
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Presentation Transcript
July, 2020 doc.: IEEE 802.11-20/1132r0 Thoughts on Extended Range (ER) Preamble Date: 2020-07-23 Authors: Name Affiliations Address Phone Email Alice Chen Sameer Vermani Bin Tian Qualcomm Submission Slide 1 Bin Tian (Qualcomm)
July, 2020 doc.: IEEE 802.11-20/1132r0 Introduction 11ax already supports ER SU PPDU while EHT R1 does not introduce any feature that enhances ER mode Suggest not defining EHT ER SU for R1. Open for more discussion in R2 Need to discuss whether to define Extended Range (ER) preamble in R1 Mainly for forward compatibility on existence. Enable EHT R1 device to interpret preamble of future ER PPDU Only requirement on R1 device is to detect/classify ER preamble and decode/interpret the version independent fields of U-SIG In this presentation we present an example of ER preamble design based on HE ER SU preamble Submission Slide 2 Bin Tian (Qualcomm)
July, 2020 doc.: IEEE 802.11-20/1132r0 Example of ER Preamble Similar design as in 11ax ER SU preamble Power boosting L-STF/L-LTF Repeated L-SIG (RL-SIG) Four U-SIG symbols carry 2x26 bits U-SIG content. 11ax ER SU HE-SIGA alike repetition and interleaving scheme U-SIG-1 & U-SIG-2 carry same coded bits, and U-SIG-3 & U-SIG-4 carry same coded bits U-SIG-1 & U-SIG-3 use interleaving, while U-SIG-2 & U-SIG-4 don t use interleaving, for better diversity ER preamble classification RL-SIG + L_LEN%3 == 0 11be & beyond Q-BPSK rotation in U-SIG-2 to indicate ER preamble QBPSK ER Preamble detection L_LEN%3==0 L-SIG RL SIG U-SIG- 1 U-SIG- 2 U-SIG- 3 U-SIG- 4 L-STF L-LTF Submission Slide 3 Bin Tian (Qualcomm)
July, 2020 doc.: IEEE 802.11-20/1132r0 SP Do you support to define ER preamble (classification and U-SIG decoding only for forward compatibility) but not ER PPDU in 11be in R1? Y/N/ABS Submission Slide 4 Bin Tian (Qualcomm)
