1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
18 November, 2009
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: Extension to datareq frame in Low-Energy amendment to e
Date Submitted: 18 November, 2009
Source: Wei Hong and Greg Gillooly (Aclara Corp.)
Company: Arch Rock Corporation
Address: 501 2nd Street, Suite 410, San Francisco, CA 94707, USA
Voice: , FAX: ,
Re: e amendment draft
Abstract: Extension to datareq frame in Receiver Initiated Transmission (RIT)
Purpose: Extension to e Low-Energy amendment
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
Wei Hong, Arch Rock Corporation
<author>, <company>

2. Datareq Frame Payload Options
<month year>
doc.: IEEE <doc#>
18 November, 2009
Datareq Frame Payload Options
No payload: only listen right after datareq frame
Payload format
Time to first listen (T0): 1 octet
Number of repetitions (N): 1 octet
Repeat listen interval (T): 2 octet
Transmit
Transmit
Sender
Transmit
datareq
Transmit
datareq
listen
listen
listen
listen
Receiver T0 T T T N
Wei Hong, Arch Rock Corporation
<author>, <company>

3. RIT Behavior with Datareq Payload
<month year>
doc.: IEEE <doc#>
18 November, 2009
RIT Behavior with Datareq Payload
Each listen lasts for macRitDataWaitPeriod
Each listen period needs to start slightly earlier to account for clock drift
Compute guard time based on the time since the last datareq frame transmission
Listen repetition cannot last beyond the next datareq frame transmission
macRitPeriod ≥ T0 + N × T
Wei Hong, Arch Rock Corporation
<author>, <company>