1. doc.: IEEE 802.15-<doc#>
<month year>
doc.: IEEE <doc#>
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: Transmission in an RSLN enabled PAN
Date Submitted: 14 March, 2012
Source: Seong-Soon Joo, Jong-Arm Jun, Nae-Soo Kim, Cheol-Sig Pyo
Company: ETRI
Address: 161 Gajeong-dong, Yuseong-gu, Daejeon, KOREA
Voice: , FAX: ,
Re:
Abstract: As an initial draft for the LECIM MAC, to extend the networking coverage of a star network, transmission in the Relayed Slot-Link Network (RSLN) enabeld PAN is described.
Purpose: Initial draft for the LECIM MAC
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. Transmission in an RSLN enabled PAN
<month year>
doc.: IEEE <doc#>
Transmission in an RSLN enabled PAN
Seong-Soon Joo*,
Jong-Arm Jun, Nae-Soo Kim, Cheol-Sig Pyo
ETRI
<author>, <company>

3. Transmission in RSLN enabled PAN (I)
Starting transmission of a frame
command frame generation
MLME primitives by next higher layer of originator MAC
data frame generation
MCPS primitive by next higher layer of originator MAC
new attribute for MCPS-DATA.request
TxGrade : GRADE_0, GRADE_1, GRADE_2
Usage of slot-links for trasmitting a frame
command frame
from the PAN coordinator : coordinator slot or bidirectional device slot
from a device : bidirectional device slot
data frame
GRADE_0 : prioritized device slot
GRADE_1 : bidirectional device slot
GRADE_2 : bidirectional device slot

4. Transmission in RSLN enabled PAN (II)
Relaying in an RSLN repeater
3rd level frame filtering
satify all the requirements except matching destination address
relaying a frame from a slot to a slot
relaying of a frame from prioritized device slot
inward only
search the nearest prioritized device slot
if no ACK within macAckWaitDuration, search another prioritized device slot or bidirectional device slot assigned to the device
relaying of a frame from coordinator slot
outward only
synchronous relaying to the coordinator slot
synchronize to the inner coordinator cyclic-frame beacon
relaying of a frame from bidirectional device slot
relaying tier of Data IE is lower than the repeater’s tier, relay outward
otherwise, relay inward
inward : synchronize to the outer coordinator cyclic-frame beacon
outward : synchronize to the inner coordinator cyclic-frame beacon

5. Transmission in RSLN enabled PAN (III)
outward relaying
coordinator
layer 1
repeater A A A
layer 2
repeater a A a A a
layer 3
device 1 a a
inward relaying
coordinator
layer 1
repeater A A A
layer 2
repeater a A a A a
layer 3
device 1 a a

6. Multiple Grades of Slot Access
try on the earlist prioritized device slot
if no slot-link ACK within macAckWaitDuration, try on the bidirectional device slot or the next prioritized device slot which comes first
if no slot-link ACK within macAckWaitDuration, repeat 2nd phase for macMaxFrameRetries times
GRADE_1
waits for the primary bidirectional device slot in the cyclic-superframe, transmits the data
if the device fails to transmit the data in the primary bidirectional device slot in repeater, the device will keep searching supplementary bidirectional device slots for the duration of the cyclic-superframe or will search the coming cyclic-superframe for an opportunity to transmit the data.
if no ACK within slotted-su[erframe duration*macRelayingTier, repeat 2nd phase for macMaxFrameRetries times
GRADE_2

7. Use of Acknowledgement (I)
ACK in an RSLN enabled network
end-to-end ACK
relaying ACK in repeaters
slot-link ACK
repeater’s ACK
Usage of ACK
GRADE_0 : slot-link ACK & ACK
GRADE_1 : ACK, GACK
GRADE_2 : no ACK mechanism

8. Use of Acknowledgement (II)
Enhanced ACK frame
Header IE
RSLN ACK
slot-link ACK
GACK
RSLN ACK IE
Octets:1 6
variable
ACK control
Time-stamp
List of seq number of ACKed frame
Bits: 0-1
2-5
6-7
ACK type
Number of ACKed frame
reserved
ACK = 0
Slot-link ACK = 1
Group ACK = 2
ACK/Slot-link ACK = 1
GACK < 16

9. Use of Acknowledgement (III)
Originator next higher layer
Originator MAC
Repeater
MAC
Recipient MAC
Recipient next higher layer
MCPS-DATA,request(gr0)
Data (AR=1)
Data (AR=1)
slot-link ACK
slot-link ACK
Acknowledgment
MCPS-DATA,indication
Acknowledgment
MCPS-DATA,confirm

10. Use of Acknowledgement (IV)
Originator next higher layer
Originator MAC
Repeater
MAC
Recipient MAC
Recipient next higher layer
MCPS-DATA,request(gr1)
Data (AR=1)
Data (AR=1)
Acknowledgment
MCPS-DATA,indication
Acknowledgment
MCPS-DATA,confirm

11. Use of Acknowledgement (V)
Originator next higher layer
Originator MAC
Repeater
MAC
Recipient MAC
Recipient next higher layer
MCPS-DATA,request(gr0)
Data (AR=1)
slot-link ACK
Data (AR=1)
Retry Transmission in alternative slots
Data (AR=1)
slot-link ACK
MCPS-DATA,indication
Acknowledgment
Acknowledgment
MCPS-DATA,confirm

12. Use of Acknowledgement (VI)
Originator next higher layer
Originator MAC
Repeater
MAC
Recipient MAC
Recipient next higher layer
MCPS-DATA,request(gr1)
Data (AR=1)
Data (AR=1)
Retry Transmission in alternative slots
Data (AR=1)
Data (AR=1)
MCPS-DATA,indication
Acknowledgment
Acknowledgment
MCPS-DATA,confirm

13. Pending Slot Frames (I)
Pending frames
the PAN coordinator or repeaters can pend
outward link only
only on bidirectional device slot
no ACK replied from the outward bidirectional device slot
keep transmitting pending frame in bidiretional device slot
start to provide pending slot infor in beacon
wait for macPendingWaitDuration* slotted-suerframe duration, remove pending slot infor
Extracting pending data
when finding a pending slot in beacon, wake up on the bidirectional device slot to receive a frame
expire pending after macPendingWaitDuration * slotted-suerframe duration

14. Pending Slot Frames (II)
Recipient next higher layer
Recipient
MAC
Repeater
MAC
PAN Coordinator
MAC
PAN Coordinator next higher layer
MCPS-DATA,request(gr1)
Data (AR=1)
Data (AR=1)
Retry Transmission in primary bidir. slot
Beacon (pending slot)
Data (AR=1)
Acknowledgment
Acknowledgment
MCPS-DATA,confirm
MCPS-DATA,indication

15. Thanks for your Attention! ssjoo@etri.re.kr