1. Discussion on EHT PAR Construction
Sept 2016
doc.: IEEE /1066
November 2018
Discussion on EHT PAR Construction
Date:
Authors:
Name
Company
Address
Phone
Yusuke Tanaka
Sony Corporation
Kosuke Aio
Sho Furuichi
Naotaka Sato
William Carney
Sony Electronics
Yusuke Tanaka(Sony Corporation), et al.
Adrian Stephens, Intel Corporation

2. November 2018
Background
Several candidate technologies had been proposed in the past EHT TIG and SG sessions.
The proposed technologies are 6GHz support, 320MHz, 16SS, Multi-AP Coordination, HARQ, etc.
To construct initial PAR drafts, following two items need to be considered.
Efficient spec development process
Features to be considered in the PAR construction
Yusuke Tanaka(Sony Corporation), et al.

3. November 2018
Introduction
Multiple-PAR process has been raised for a new amendment in addition to a conventional single-PAR process. This contribution shows our views on a PAR constructing process.
This contribution also discussed what type of features should be considered in a PAR construction for EHT.
This contribution shows which PAR the features should be considered in, in case that multiple PARs are constructed.
Yusuke Tanaka(Sony Corporation), et al.

4. Views on a PAR Constructing Process
November 2018
Views on a PAR Constructing Process
The purpose of constructing a PAR is clarifying direction to develop a new amendment to achieve the primary objectives.
According to the primary objectives of EHT described in [1], conventional single-PAR process and new multiple-PAR process can both move forward with developing a new amendment.
Creating one PAR which covers all of the objectives.
Creating multiple PARs which cover the objectives together with clear boundaries.
If the new multiple-PAR process is adopted, roles and difference of the two PARs should be clarified.
Yusuke Tanaka(Sony Corporation), et al.

5. Discussion on Multiple PARs (1/2)
November 2018
Discussion on Multiple PARs (1/2)
One of the advantages of constructing multiple PARs is enabling multiple target completion dates of spec developments.
Features which can/should be developed in a short term can be delivered to the market earlier. This could realize short cycle evolution of WLAN.
Whether a feature is in a short or long term PAR depends on its complexity.
This is an essential advantage comparing to a conventional single-PAR process.
Defining multiple PARs based on technology axes, for example, can be handled by ad-hoc system with single PAR.
Yusuke Tanaka(Sony Corporation), et al.

6. Discussion on Multiple PARs (2/2)
November 2018
Discussion on Multiple PARs (2/2)
There are two candidates of start dates with multiple PARs.
Case1: Start two developments at the same date
In this case, decisions of each development could affect each other.
Ad-hoc system with single PAR is better because there can be more communication between multiple groups.
Case2: Start first development, then start second one when a milestone of first one (e.g. D1.0) is achieved
Development based on second PAR could start with the first semi-fixed spec as a baseline.
This direction can make developing process efficient.
If the new multiple-PAR process is adopted, multiple target completion dates and start dates should be considered.
Yusuke Tanaka(Sony Corporation), et al.

7. Views on Features to be Considered in the PAR Construction
November 2018
Views on Features to be Considered in the PAR Construction
A new amendment to be developed in the EHT should evolve from the existing 11ax spec with some mandatory features.
This direction could make a new amendment more attractive and valuable for wireless LAN users.
As discussed in the contribution [2], some novel features jump straight to mandatory, and some evolve from optional to mandatory.
We discussed some features proposed in the past EHT sessions from the aspect of PAR constructions, especially whether those could evolve a new amendment from the 11ax.
Yusuke Tanaka(Sony Corporation), et al.

8. 6GHz Support for PAR construction
November 2018
6GHz Support for PAR construction
6GHz support enables more channels that could realize wider channel bonding and congestion reduction.
These advantages contribute to achieve the primary objectives; to increase peak throughput and improve efficiency.
6GHz support should be considered in the PAR construction.
11ax has already supported 6GHz. Matured efficient operation in 6GHz band (includes 320MHz) evolves a new amendment from the 11ax.
In case that multiple PARs are constructed, 6GHz support should be captured in a PAR for short-term development.
11ax has developed some basic functions in 6GHz band, therefore those can be reused as baselines for the enhancement of this band.
Yusuke Tanaka(Sony Corporation), et al.

9. Multi-AP Coordination for PAR construction
November 2018
Multi-AP Coordination for PAR construction
Multi-AP Coordination is a completely new feature in
There are some types of this feature such as time/frequency/power coordination, coordinated beamforming, joint transmissions. [3-5]
Potential to improve performance has been reported. [6-8]
Multi-AP Coordination should be considered in the PAR construction.
This new feature enables efficient resource use and multi-user access, that evolves a new amendment from the 11ax.
In case that multiple PARs are constructed, Multi-AP Coordination should be captured in a PAR for long-term development.
Synchronization accuracy should to be carefully considered and designed.
Resource coordination could be possibly in a PAR for short-term.
Yusuke Tanaka(Sony Corporation), et al.

10. Summary This submission showed our views on PAR construction process.
November 2018
Summary
This submission showed our views on PAR construction process.
Single-PAR process and multiple-PAR process can both move forward with developing a new amendment
If multiple-PAR process is adopted, the PARs should be constructed regarding to multiple target completion dates of spec developments.
This contribution also discussed what type of features should be considered in a PAR construction for EHT.
Features which could evolve a new amendment from 11ax should be considered. We discussed 6GHz support and Multi-AP coordination from that aspect.
Yusuke Tanaka(Sony Corporation), et al.

11. November 2018
Reference
[1] july-2018-wg-motions [2] eht-candidate-technology-review [3] eht-discussion-on-par [4] eht-view-on-eht-candidate-features [5] eht-features-for-multi-ap-coordination [6] eht-eht-technology-candidate-discussions [7] eht-ap-coordinated-beamforming-for-eht [8] eht-considerations-on-ap-coordination
Yusuke Tanaka(Sony Corporation), et al.