1. doc.: IEEE 802.15-<doc#>
<11 January, 2008r>
<11 January, 2008r>
doc.: IEEE <doc#>
doc.: IEEE <doc#>
May, 2009
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [MAC Enhancements for TSCH Summary] Date Submitted: [12 May, 2009] Source: [Chol Su Kang] [Kris Pister] ] [Kuor Hsin Chang] ] [Rick Enns] [ ] [Ludwig Winkel] [ ] [Clint Powell] [ ] [José A. Gutierrez] [ ] Abstract: [MAC Enhancements required for TSCH] Purpose: [This document presents the MAC Enhancements required for TSCH] 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
Chol Su Kang et al.
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2. doc.: IEEE 802.15-<doc#>
<11 January, 2008r>
<11 January, 2008r>
doc.: IEEE <doc#>
doc.: IEEE <doc#>
May, 2009
MAC Enhancement for Time Slotted, Channel Hopping (TSCH)
May, 2009
Chol Su Kang et al.
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3. TSCH Subgroup Chang, Kuor-Hsin [Freescale]
May, 2009
TSCH Subgroup
Chang, Kuor-Hsin [Freescale]
De Mil, Pieter [Universiteit Gent]
Dixon, Paul [Huawei]
Enns, Rick [Consultant]
Gutierrez, Jose [Emerson]
Jeong, Wun-Cheol [ETRI]
Li, Liang [Vinno]
Kang, Chol Su [Dust Networks]
McInnis, Michael [Boeing]
Pister, Kris [UC Berkeley, Dust Networks]
Powell, Clint [Independent]
Struik, Rene [Certicom]
Wang, Qin [USTB]
Winkel, Ludwig [Siemens AG]
Zang, Chuanzhi [MTU]
Chol Su Kang et al.

4. Application Support Industrial Applications, but not limited to
May, 2009
Application Support
Industrial Applications, but not limited to
Process Automation
Network requires reliability, low-power, and scalability
Compatible with WirelessHART/IEC and/or ISA100 devices
Chol Su Kang et al.

5. Proposed Changes MAC Enhancements for TSCH Modified MAC Primitive
May, 2009
Proposed Changes
MAC Enhancements for TSCH
Modified MAC Primitive
MCPS-DATA
New MAC Primitives
SET-SLOTFRAME, SET-LINK, TSCH-MODE, LISTEN, ADVERTISE, KEEP-ALIVE, JOIN, ACTIVATE, DISCONNECT
New MAC Command Frames
Advertisement, Keep-Alive, Join, Activate, Disconnect
New PIB
macSlotframeTable, macLinkTable, macTimeslotTemplate, macHoppingSequence, macDisconnectTime
Doc#: IEEE e.
Slide 5
Chol Su Kang et al.

6. Modified MAC Primitive
May, 2009
Modified MAC Primitive
MCPS-DATA.request
Added four new parameters to provide the support for efficient use of multi-paths in transferring data frames.
Added parameters
NumberOfAdditionalDstAddr
additionalDstAddr
numberOfLinkHandles
linkHandleList
Chol Su Kang et al.

7. Modified MAC Primitive (Cont’d)
May, 2009
Modified MAC Primitive (Cont’d)
MCPS-DATA.confirm
New parameters added to indicate the link and destination to which the requested data frame has been transferred.
Added parameters
DstAddr
linkHandle
Chol Su Kang et al.

8. MCPS-DATA Enhancement Example
<11 January, 2008r>
<11 January, 2008r>
doc.: IEEE <doc#>
doc.: IEEE <doc#>
MCPS-DATA Enhancement Example
May, 2009
Timeslot
Chan.
offset
BA D
A  D A
. . .
. . .
. . .
BA C
BC B
CA
Two links from B to A and one link from B to C provide paths to D from B
MCPS-DATA.request can specify MAC to use more than one destinations and/or multiple links transferring a data frame.
Backward compatible
Slide 8
Chol Su Kang et al.
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9. New MAC Service Primitives
May, 2009
New MAC Service Primitives
ADVERTISE
SP to initiate the advertisement of the TSCH network to new devices
LISTEN
SP used by new device to discover the network
SET-SLOTFRAME, SET-LINK
SP to add, modify, delete Slotframe or Link
TSCH-MODE
SP to start (or stop) TSCH mode
Chol Su Kang et al.

10. Advertise and Listen (Discovery) Procedure
May, 2009
Advertise and Listen (Discovery) Procedure
Chol Su Kang et al.

11. New MAC Service Primitives (Cont’d)
May, 2009
New MAC Service Primitives (Cont’d)
JOIN, ACTIVATE
SP to request to join the network, and to activate the new joining device.
DISCONNECT
SP to initiate the disconnection gracefully
KEEP-ALIVE
SP to maintain clock synchronization with the destination node.
Chol Su Kang et al.

12. Join and Activate Procedure
May, 2009
Join and Activate Procedure
Chol Su Kang et al.

13. New Command Frames Added
May, 2009
New Command Frames Added
Advertisement
Keep-Alive
Join
Activate
Disconnect
Chol Su Kang et al.

14. New PIB macSlotframeTable macLinkTable macTimeslotTemplate
May, 2009
New PIB
macSlotframeTable
Table containing information on slotframes used in the network
macLinkTable
Table containing information on link resource allocated to the device
macTimeslotTemplate
Timeslot template supported by the device
macHoppingSequence
Hopping Sequence/Algorithm supported by the device
macDisconnectTime
Timer value for the duration for which MAC should send Disconnect frames before disconnecting from the network.
Chol Su Kang et al.

15. Backward Compatibility
May, 2009
Backward Compatibility
TSCH extends the ACK to support clock propagation and improved security:
ACK carries time adjustment information
ACK contains addressing and MIC32
Can be new ACK frame type, or use existing data frame
MCPS-DATA.request
NumberOfAdditionalDstAddr and numberOfLinkHandles are set to zero
Slide 15
Chol Su Kang et al.

16. May, 2009
Open-source TSCH
UC Berkeley students have open-source implementation on a commercial mote platform/silicon.
Chol Su Kang et al.