Transcript Jan. 2002 doc.: IEEE 802.15-02/068r0 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: IEEE802.15.3: Power Save Proposal Date Submitted:

Jan. 2002
doc.: IEEE 802.15-02/068r0
Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: IEEE802.15.3: Power Save Proposal
Date Submitted: 23 January, 2002
Source: Dr. William Shvodian
Company: XtremeSpectrum, Inc.
Address: 8133 Leesburg Pike, Suite 700, Vienna, VA 22182
Voice: 703-269-3047 , FAX: 703-269-3092 , E-Mail: [email protected]
Re: [ Power save mechanism in TG3-MAC ]
Abstract: This provides a comparison of the proposed power save mechanism for TG3-MAC.
Purpose: To provide information for comment resolution of LB12
Notice: This document has been prepared to assist the IEEE P802.15. It is offered as a basis for
discussion and is not binding on the contributing individual(s) or organization(s). The material in this
document is subject to change in form and content after further study. The contributor(s) reserve(s) the
right to add, amend or withdraw material contained herein.
Release:
The contributor acknowledges and accepts that this contribution becomes the property of IEEE and
may be made publicly available by P802.15
Submission
Slide 1
Dr. William Shvodian
Jan. 2002
doc.: IEEE 802.15-02/068r0
Complexity of EPS in D09
• 11 power management primitive parameters
• 6 power management commands
• Multiple commands (and Beacons) required
for entering EPS mode
• Power Management Information Element –
Where is this ever used?
• 7 full pages of text in Clause 8.
• Very difficult to understand, much less
implement.
• Violates the KISS principal.
Submission
Slide 2
Dr. William Shvodian
Jan. 2002
doc.: IEEE 802.15-02/068r0
Complexity of EPS in D09
• PNC needs to change CTAs for every DEV in
each EPS set twice per sleep interval
• Critical timing interaction required between
Beacon contents and Beacon transmission
time
• Multiple areas of the standard have been
modified and complicated in the name of
power management (CTRB, CTA)
• Requires unspecified upper layer negotiation
for EPS set configuration and maintenance
Submission
Slide 3
Dr. William Shvodian
Jan. 2002
doc.: IEEE 802.15-02/068r0
Things that PNC must maintain for EPS
• Members of EPS Set
–
–
–
–
–
–
–
EPS Set Value (1 octet)
EPS Set Members (1 octet per member)
EPSTime (2 octets) & associated timer(s)
EPSNext (2 octets)
ATP
Streams associated with the EPS Set
CTAs for each DEV in the EPS set
• CTAs: Active, EPS, Null
• 4+ EPS action types
Submission
Slide 4
Dr. William Shvodian
Jan. 2002
doc.: IEEE 802.15-02/068r0
Gubbi Alternative Power Save Proposal
•
•
•
•
•
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•
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No IP
2 or 3 command types
2 MLME primitive parameters
3 total commands – single exchange to enter sleep
1 EPS mode
1 type of CTA
PNC only has to track ATP.
PNC does nothing but receive Sleep Continue
frames if DEVs stay in EPS mode
• PNC only has to change CTAs when DEV wakes
• Easy to understand, easy to implement, low
complexity, low power for both DEV and PNC
Submission
Slide 5
Dr. William Shvodian
Jan. 2002
doc.: IEEE 802.15-02/068r0
Recommendation
• Adopt Gubbi proposed text as the new
power save baseline.
Submission
Slide 6
Dr. William Shvodian