1. < November, 2011 >
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [More Low Energy Mechanism Details]
Date Submitted: [15 November, 2011]
Source: [Yang Yang]
Company [Wuxi SensingNet Industrialization Research Institute]
Address [No.767, Jinzhong Rd, Shanghai, China]
Voice:[ ], FAX: [ ] E-
Re: [complement for proposal (DCN: , 9 November, 2011)]
Abstract: [This document proposed more details of low energy mechanism for 4k, include message sequence chart and frame, PIB modification suggestion.]
Purpose: [Proposal for consideration of inclusion into k.]
Notice: This document has been prepared to assist the IEEE P 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 P

2. More Low Energy Mechanism Details
< November, 2011 >
More Low Energy Mechanism Details
15-Nov-2011

3. Outline Proposed Low Energy MAC for 4k Message Sequence Chart
< November, 2011 >
Outline
Proposed Low Energy MAC for 4k
Message Sequence Chart
New MAC Frame Suggestion
New MAC PIB Suggestion
Summary

4. Proposed Low Energy MAC for 4k (1)
< November, 2011 >
Proposed Low Energy MAC for 4k (1)
based on non-beacon mechanism in 15.4
end point
listen the channel periodically, other time keep sleeping
if has data to transmit, send frame by using CSMA/CA
without receiving Ack, retransmit the frame
collector
main powered, keep listening for the channel
if coordinator has unicast frame to send, after receiving frame from the corresponding end point, send the frame as Ack for the frame

5. Proposed Low Energy MAC for 4k (2)
< November, 2011 >
Proposed Low Energy MAC for 4k (2)
when collector has high QoS lever frame or emergency frame need to send to endpoint, collector need to wakeup end point
end point
listen the channel periodically, for being available to be woke up by collector
collector
send wakeup sequence
{wakeup frame + interval of wakeup frames}
indicate the unicast/broadcast type of the next frame in wakeup frame

6. Proposed Low Energy MAC for 4k (3)
< November, 2011 >
Proposed Low Energy MAC for 4k (3)
if the high QoS level data or emergency data is unicast
destination address of wakeup frame is the address of the corresponding end point
on receipt of wakeup frame, end point send data request frame
on receipt of data request frame, collector stop sending wakeup sequence, and send corresponding data frame immediately

7. Proposed Low Energy MAC for 4k (4)
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doc.: IEEE <doc#>
< November, 2011 >
Proposed Low Energy MAC for 4k (4)
if the high QoS level data or emergency data is broadcast or multicast
destination address of wakeup frame is the broadcast address,
on receipt of wakeup frame, end point send data request frame, then turn on RX at the designated time for receiving data from collector
on receipt of data request frames from all the corresponding end points, collector stop sending wakeup sequence, and send corresponding data frame at the designated time
<author>, <company>

8. Message Sequence Chart
< November, 2011 >
Message Sequence Chart

9. New MAC Frame Suggestion
< November, 2011 >
New MAC Frame Suggestion
wakeup frame
Wakeup Information
Frame Type
00 Unicast Broadcast Multicast
Data Transmit Time
the designated time for frame sending
for unicast wakeup frame, this subfield should be set to 0
Wakeup Address,
address of the multicast wakeup frame
octets: variable 1 4 2
MHR fields
Command Frame Identifier
Wakeup Information
FCS
bits: 2 14 16
Frame Type
Data Transmit Time
Wakeup Address

10. New MAC PIB Suggestion new MAC PIB attributes shall be added
< November, 2011 >
New MAC PIB Suggestion
new MAC PIB attributes shall be added
Name
Type
Description
macDataReqWaitDuration
Integer
After sending wakeup frame, the duration of waiting for data request frame, unit of this PIB is us
macListenInterval
Interval of listen for the channel periodically, unit of this PIB is ms
macWakeupFrameNum
Number of wakeup frames in each wakeup sequence
macWakeupWaitDuration
Duration of waiting for wakeup frame, when the end point listen for the channel periodically, unit of this PIB is us

11. Summary proposed low energy MAC for 4k
< November, 2011 >
Summary
proposed low energy MAC for 4k
descript message chart of proposed MAC
modification suggestion of MAC
new MAC frame
new MAC PIB attributes
more detailed work is in progress

12. < November, 2011 >
Thank you!