1. doc.: IEEE 802.15-<doc#1>
<September 2010>
doc.: IEEE <doc#1>
<September 2010>
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Resolution of TG6 comment: S6-485]
Date Submitted: [06 September, 2010]
Source: [Yan Zhang, Georgios Selimis and Guido Dolmans] Company [IMEC-NL]
Address [IMEC the Netherlands High Tech Campus 31, 5656 AE Eindhoven, The Netherlands]
Voice:[ ], FAX: [
Re: Proposed Resolution of D0 MAC Comment S6-485.
Abstract: Proposed resolution for comments: S6-485.
Purpose: This document is for the MAC comment resolution discussion for TG6 draft D01.
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
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2. Proposed Resolution of D0 Comment S6-485
<September 2010>
Proposed Resolution of D0 Comment S6-485
Comments relative to low power wake-up radio bit (6.6.2 PHY Capability).
<IMEC The Netherlands>

3. doc.: IEEE 802.15-<doc#1>
<September 2010>
doc.: IEEE <doc#1>
<September 2010>
D0 Comment S6-485
6.6.2 PHY Capability
Comment: Currently, there is only one bit which is linked with low power wake up radio in Figure 37 of MAC proposal (PHY Capability format).
Proposed Change: More details are to be filled in for the low power radio bit. Otherwise wakeup radios will not be compatible; wakeup radio will not be able to wake up the node.
<IMEC The Netherlands>

4. doc.: IEEE 802.15-<doc#1>
<September 2010>
doc.: IEEE <doc#1>
<September 2010>
Analysis: The low power wake up radio functionality has been indicated with one bit in the PHY capability format. However, there is no other information regarding this. Featured by ultra-low power channel monitoring, it is important for the BAN radio to facilitate this functionality. To make this functionality consistent to the other rest of the MAC proposal, a control frame structure and a mode shift IE (between the normal mode and the low power wake up radio mode) are proposed in details.
<IMEC The Netherlands>

5. doc.: IEEE 802.15-<doc#1>
<September 2010>
doc.: IEEE <doc#1>
<September 2010>
Proposed Resolution:
Add to “Table 3 — Frame Type and Frame Subtype field encoding” p.31, the following row in order to support low power wake-up types
Table 3 — Frame Type and Frame Subtype field encoding
Since we added the Frame Subtype “Low power wake-up”, then we have to define its format. So, we add the paragraph at the end of the “6.4 Control type frames” . Below is the text .
6.4.9
Duty cycle control can be applied to the main radio or with a separate low power wake-up radio, as specified in PHY capability. For the out-of-band low power wake-up packet, the packet format is shown in Figure 1.
Figure 1:Low power wake-up packet format
Flag bit is used to indicate if there is payload part included or not.
Optional payload part contains link configuration information of the main radio, such as PHY interface selection, modulation scheme, channel, coding rate.
The payload of the wake-up packet is illustrated in Figure 2.
Figure 2 Wake-up packet payload (narrowband)
Continued on next page
Frame Type value b4 b5
Frame Type name
Frame Subtype value b0 b1 b2 b3
Frame Subtype name 10
Control
1100
Low power wake-up
Bits: 8 1 12 3
NID
Flag
Payload
Reserved
Bits: 3 7 2
Band Index
Channel Index
Modulation Index
<IMEC The Netherlands>

6. doc.: IEEE 802.15-<doc#1>
<September 2010>
doc.: IEEE <doc#1>
<September 2010>
Band Index: the selected frequency band for the main radio communication
Table 1 — Band Index Mapping (narrowband)
Channel index: is used to identify a certain channel in the selected frequency band.
Modulation scheme: the chosen modulation scheme
Table 2 — Modulation Index Mapping (narrowband)
Table 3 — Modulation Index Mapping (UWB)
End of 6.4.9
Band Index
Frequency Band (MHz)
000
402 – 405
001
420 – 450
010
863 – 870
011
902 – 928
100
950 – 956
101
2360 – 2400
110
2400 –
111
Reserved
Modulation Index
Modulation Scheme 00
p/2-DBPSK 01
p/4-DQPSK 10
p/8-D8PSK 11
GMSK
Modulation Index
Modulation Scheme 00
DBPSK 01
DQPSK 10
PPM 11
Reserved
<IMEC The Netherlands>

7. doc.: IEEE 802.15-<doc#1>
<September 2010>
doc.: IEEE <doc#1>
<September 2010>
In addition we add the following entry to Table 12
Table 12 — Information elements defined in this standard
Insert : Low Power Wake-up Radio Mode Shift IE
A low power wake-up radio mode shift IE is formatted as shown in Figure 3. It is optionally contained in the Connection Request frames to enable out-of-band low power wake-up radio mode.
Figure 3 Low Power Wake-up Radio Mode Shift IE Format
The 4-bit low power wake-up channel ID is used to indicate a certain channel that the low power wake-up radio is to dwell on.
Table 6 — Low power wake-up cannel ID mapping 19
Low Power Wake-up Radio Mode Shift IE
Indicates mode shift request to the low power wake-up radio mode
Wake-up channel ID
Frequency
0000
869 – 870
0001
902 – 903
0010
927 – 928
0011
950 – 951
0100
2360 – 2361
0101
2361 – 2362
0110
2399 – 2400
0111
2400 –2401
1000
2401 – 2402
1001
2480 – 2481
1010
2481 – 2482
1011
2482 – 2483
Reserved
<IMEC The Netherlands>

8. doc.: IEEE 802.15-<doc#1>
<September 2010>
doc.: IEEE <doc#1>
<September 2010>
Duty cycle indicator is used to inform the coordinator about the duty cycle control used by the low power wake-up radio. The low power wake-up radio can adopt continuous channel monitoring or follow the same duty cycle control as indicated by wakeup phase and wakeup period in the Connection Request frame
Table 7 — Duty cycle indicator
Duty cycle indicator
Frequency 00
No duty-cycling applied (continuous monitoring with the low power wake-up radio) 01
Follow the same duty cycle control as indicated in the Connection Request frames
10-11
Reserved
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