Power Management Mode Definition
Power save state after multi-link setup
Date:
2020-03-15
March 2020
Laurent Cariou, Intel Corporation
Slide 1
Authors:
Objective
•
Multi-link setup procedure was agreed to setup multiple links between an AP MLD and an
non-AP MLD.
•
During that procedure, depending on the negotiated TID-to-link mapping, multiple links
will be enabled
•
We agreed that the default mapping is that all TIDs are mapped to all setup links and all links are
enabled
•
Once this is settled (after multi-link setup), STA is able to change its power save states on
each link independently.
•
What is currently not defined is: what is the initial power save state of the STAs on each
link, right after the multi-link setup exchange.
•
That’s what we propose to define in this contribution
Slide 2
Laurent Cariou, Intel Corporation
March 2020
Example to better understand
•
Typical example:
•
AP MLD operating on 3 links (2.4/5/6GHz)
•
Non-AP MLD with 3 links (2.4/5/6GHz), but with single radio functionality (only one STA of the
non-AP MLD can be awake at a time)
•
3 links are setup with default mapping:
•
TIDs mapped to all 3 links, all 3 links enabled
Slide 3
Laurent Cariou, Intel Corporation
March 2020
Baseline rules and proposal
•
Baseline spec defined association on a single link, and mandates that the power save mode
of the STA, right after the end of the association process, is the active mode (power save
state therefore in awake state).
•
Following this, STA can obviously change its power state/mode as it wants.
•
On the link on which multi-link setup frames are exchanged, we propose to follow the
same approach:
•
STA is in active mode
•
On the other links that become enabled, we propose that the initial state is doze state (in
power save mode).
•
Only possible option for our single radio non-AP MLD in the example in previous slide
•
Most logical solution also for multi-radio non-AP MLDs to save power
•
Obviously, right after this, STA can change its power mode/state through specific signaling
Slide 4
Laurent Cariou, Intel Corporation
March 2020
Straw polls
•
Do you agree to add to the 11be SFD:
•
When a link becomes enabled for a STA that is part of a non-AP MLD through multi-link
setup sent on that link, the initial power management mode of the STA, immediately after
the signaling exchange, is active mode
•
When a link is enabled for a STA that is part of a non-AP MLD through signaling (multi-
link setup or TID to link mapping update) send on another link, the initial power
management mode of the STA, immediately after the exchange, is power save mode, and its
power state is doze
Slide 5
Laurent Cariou, Intel Corporation
March 2020
doc.: IEEE 802.11-yy/xxxxr0
Month Year
John Doe, Some Company
Page
This document discusses the definition of the initial power save state for STAs on each link after the multi-link setup exchange in a WLAN scenario. It includes examples, baseline rules, and proposals for power management modes.
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Presentation Transcript
March 2020 doc.: 20/0391r0 Power save state after multi-link setup Date: 2020-03-15 Authors: Name Affiliations Address Phone email Laurent Cariou Intel Po-Kai Huang Intel Minyoung Park Intel Submission Slide 1 Laurent Cariou, Intel Corporation
March 2020 doc.: 20/0391r0 Objective Multi-link setup procedure was agreed to setup multiple links between an AP MLD and an non-AP MLD. During that procedure, depending on the negotiated TID-to-link mapping, multiple links will be enabled We agreed that the default mapping is that all TIDs are mapped to all setup links and all links are enabled Once this is settled (after multi-link setup), STA is able to change its power save states on each link independently. What is currently not defined is: what is the initial power save state of the STAs on each link, right after the multi-link setup exchange. That s what we propose to define in this contribution Submission Slide 2 Laurent Cariou, Intel Corporation
March 2020 doc.: 20/0391r0 Example to better understand Typical example: AP MLD operating on 3 links (2.4/5/6GHz) Non-AP MLD with 3 links (2.4/5/6GHz), but with single radio functionality (only one STA of the non-AP MLD can be awake at a time) 3 links are setup with default mapping: TIDs mapped to all 3 links, all 3 links enabled Submission Slide 3 Laurent Cariou, Intel Corporation
March 2020 doc.: 20/0391r0 Baseline rules and proposal Baseline spec defined association on a single link, and mandates that the power save mode of the STA, right after the end of the association process, is the active mode (power save state therefore in awake state). Following this, STA can obviously change its power state/mode as it wants. On the link on which multi-link setup frames are exchanged, we propose to follow the same approach: STA is in active mode On the other links that become enabled, we propose that the initial state is doze state (in power save mode). Only possible option for our single radio non-AP MLD in the example in previous slide Most logical solution also for multi-radio non-AP MLDs to save power Obviously, right after this, STA can change its power mode/state through specific signaling Submission Slide 4 Laurent Cariou, Intel Corporation
March 2020 doc.: 20/0391r0 Straw polls Do you agree to add to the 11be SFD: When a link becomes enabled for a STA that is part of a non-AP MLD through multi-link setup sent on that link, the initial power management mode of the STA, immediately after the signaling exchange, is active mode When a link is enabled for a STA that is part of a non-AP MLD through signaling (multi- link setup or TID to link mapping update) send on another link, the initial power management mode of the STA, immediately after the exchange, is power save mode, and its power state is doze Submission Slide 5 Laurent Cariou, Intel Corporation
