1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: PAC Cyclic-Superframe Operational Guide
Date Submitted: 08 Nov., 2016
Source: Seong-Soon Joo
Company: ETRI
Address: 161 Gajeong-dong, Yuseong-gu, Daejeon, KOREA
Voice: , FAX: ,
Re:
Abstract: As a contribution proposal for the IEEE TG8 standards, the operation of PAC cyclic- superfame is proposed.
Purpose: To provide usage guide of the cyclic-superframe structure
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
<author>, <company>

2. PAC Cyclic-Superframe Structure Operational Guide
<month year>
doc.: IEEE <doc#>
PAC Cyclic-Superframe Structure Operational Guide
Seong-Soon Joo
ETRI
<author>, <company>

3. Variety of Services in PAC Networks (I)
Group A : on-line game
Initiator invites on-line gamers and waits for 10 minutes
Initiator forms a peer group and starts a game
Game control messages are exchanged among gamers every 500 ms
Group B : advertisement
Advertiser sends advertisement to customers in the shopping mall every 1 sec
Customer starts to listen advertisement for 30 minutes while locating in the mall
Group C : equipment control
Equipment controller discovers sensing and actuation devices all the times
Sensing device sends data every 10 sec
Equipment controller sends control data every 10 sec
Sensing device should send urgent signal no later than 100 ms
peer group A
peer group B
peer group C

4. Variety of Services in PAC Networks (II)
Different required quality of service
Group A : on-line game
Bounded deterministic latency
Group B : advertisement
Loss tolerable
Group C : equipment control
Loss sensitive and bounded deterministic latency
Urgent signal
Different resource usage patterns
Group A : on-line game
Forming a group before starting a service
Group B : advertisement
Any device can join and leave anytime
Group C : equipment control
Designated devices are discovered
Maintain devices all the times
peer group A
peer group B
peer group C

5. How to Support Variety of Services
To less consume the power, need to know when receiver is on
Use cyclic-superframe structure for a PAC group
Different resource usage on the service initiator and responder
Possible to assign a cyclic-superframe structure for a PD
peer group A
discover
peering
data
discover
peering
data
peer group B
discover
peering
data
peering
data
peering
data
discover
peering
data
discover
peer group C
discover
peering
data
peering
data
peering
data
discover
peering
data

6. Initialize Cyclic-Superframe Structure
Default configuration
Cyclic-superframe size = 1
Number of superframe pattern A = 1
Type of superframe pattern A = b1010
Type of superframe pattern B = don’t care
Set the cyclic-superframe structure
Configure cyclic-superframe structure as an initiator
Configure cyclic-superframe structure as a responder
initiator
Cyclic-superframe Y S D P
CAP
CFP
Superframe A S S D P
CAP
CFP
Superframe B S
Superframe A
Superframe B
responder
Cyclic-superframe X
Cyclic-superframe X
Cyclic-superframe X
Cyclic-superframe X S D P
CAP
CFP
Superframe A S
Superframe A S
Superframe A S
Superframe A

7. Follow Cyclic-Superframe Structure
Responder follows the configuration of cyclic-superframe structure
When receiving the configuration of cyclic-superframe structure from the initiator
initiator
Cyclic-superframe Y
Superframe A S
Superframe A S
Superframe B S
Superframe B S
DiscoveryRequest command
(CyclicSuperframe IE)
responder
Cyclic-superframe X
Cyclic-superframe Y
Superframe A S
Superframe A S
Superframe B S
Superframe B S
MLME-DISCOVERY.indication {CyclicSuperframeStructure,
CyclicSuperframeStart)
MLME-SETCYCLICSUPERFRAME.request {CyclicSuperframeStructure,
CyclicSuperframeStart}

8. Start Time of Cyclic-Superframe Structure
MAC sublayer counts superframes after synchronization
modulo 255  (4095)
The location of a superframe in a cyclic-superframe is indexed by the superframe count
The higher layer may select the start of cyclic-superframe with indexing the superframe
The start time of cyclic-superframe is calculated with superframe count and Sequence Number field of the Cyclic-superframe descriptor IE
CyclicSuperframeStart = (Superframe count + Cyclic-superframe size - Sequence Number + 1) % 255
Higher layer of initiator
MLME-SETCYCLICSUPERFRAME.request = {CyclicSuperframeStart = superframe n+1)
Cyclic-superframe X
Superframe S
Superframe S
Superframe A S
Superframe B S
Cyclic-superframe IE (Sequence Number = 1)
Cyclic-superframe IE (Sequence Number = 2)
superframe 0
superframe n
PeeringRequest command
(CyclicSuperframe IE)
Cyclic-superframe X
Superframe S
Superframe S
Superframe A S
Superframe B S
superframe m
superframe m+n
CyclicSuperframeStart =
(Superframe count + Cyclic-superframe size - Sequence Number + 1) % 255
Higher layer of responder
MLME-PEERING.indication = {CyclicSuperframeStart = superframe m+n+1+2)

9. Change Cyclic-Superframe Structure
Initiator can change the cyclic-superframe structure
After completing discovery, change the configuration of cyclic-superframe structure
initiator
Cyclic-superframe Z
Cyclic-superframe Z
Superframe A S
Superframe B S
Superframe A S
Superframe B S
PeeringRequest command
(CyclicSuperframe IE)
Cyclic-superframe Y
responder
Superframe A S
Superframe B S
Superframe B S
Cyclic-superframe Y
Cyclic-superframe Z
Cyclic-superframe Z
Superframe A S
Superframe B S
Superframe A S
Superframe B S

10. Maintain Cyclic-Superframe Structure
PIB
Maximum length of cyclic-superframe
256  4096
List of cyclic-superframe structure
PD_ID/Group_ID/MulticastGroup_ID
CyclicSuperframeStructure
Cyclic-superframe size
Number of superframe pattern A
Type of superframe pattern A
Type of superframe pattern B
CyclicSuperframeStart
0~255
Check current cyclic-superframe structure
Initiator PD can advertise configuration of cyclic-superframe structure with Cyclic-superframe descriptor IE of a data frame

11. Operation of Multiple Cyclic-Superframe
MAC sublayer of a PD listens or transmits frames at periods assigned with the projection of multiple cyclic-superframe
Cyclic-superframe 1 S D P
CAP
CFP S D P
CAP
CFP S D P
CAP
CFP
Cyclic-superframe 2 S D P
CAP
CFP S D P
CAP
CFP S D P
CAP
CFP
Cyclic-superframe 3 S D P
CAP
CFP S D P
CAP
CFP S D P
CAP
CFP
Cyclic-superframe 3 S D P
CAP
CFP S D P
CAP
CFP S D P
CAP
CFP S D P
CAP
CFP S D P
CAP
CFP S D P
CAP
CFP

12. Revision Required (I) Increase the maximum length of cyclic-superframe
Change 256 to 4,096
Revision required
5.1.2 Cyclic-superframe
The maximum cyclic-superframe size is 255  4,096 superframes.
Cyclic-superframe descriptor IE
Figure 49
Change length of Sequence Number, Cyclic-superframe Size, Number of superframe Pattern A into Octets: 2
Table 33 Cyclic-superframe descriptor
Valid range of Cyclic-superframe Size, Number of superframe Pattern A into 2 Octets
Add a time information of cyclic-superframe
new parameter : CyclicSuperframeStart
Revision required primitives
MLME-SETCYCLICSUPERFRAME.request
MLME-DISCOVERY.indication
MLME-PEERING.indication

13. Revision Required (II)
Revise the description on primitives
Revise the PIB
macCyclicSuperframeStructureList
Add new table for defining Cyclic-superframe structure
macCyclicSuperframeStr uctureList
List of Cyclic- superframe Structure
Set as defined in Table xx
Default Cyclic- superframe Structure
The list of the cyclic- superframe structure of PAC groups operating within communication range
Property
Type
Valid range
Description
Cyclic-superframe ID
Enumeration, Integer
PD_ID, Group_ID, MulticastGroup_ID
2 octet
Identifier of Cyclic-superfame
Cyclic-superframe Size
Integer
Number of superframes in a cyclic-superframe.
Number of superframe pattern A
Type of superframe pattern A
As defined in
Active periods in superframe pattern A
Type of superframe pattern B
Active periods in superframe pattern B
Start time of cyclic-superframe
Superframe index of the first frame of a cyclic-superframe