The Study of 6LoWPAN with SCTP Multi-homing in Smart Grid Yang-Wen Chen, Arak Sae Yuan, Kuan-Ta Lu and Quincy Wu Department of Computer Science and Information.

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Presentation transcript:

The Study of 6LoWPAN with SCTP Multi-homing in Smart Grid Yang-Wen Chen, Arak Sae Yuan, Kuan-Ta Lu and Quincy Wu Department of Computer Science and Information Engineering, National Chi Nan University, Nantou, Taiwan 1

Outline Background Motivation Network Layer Protocol Transport Layer Protocol System Architecture Component – LKSCTP Protocol Stack Component – Atmel RZRAVEN USB Dongle Multi-homing Experiments Performance Analysis Conclusion 2

Feature(s)Zigbee6LoWPAN Addressing mode Stochastic Addressing SLAAC (StateLess Address AutoConfiguration) Number of address 2 16 NWK address2 128 IP address Integration with current Internet (TCP/IP network) ZigBee/IP translator is required No translator is required Background Zigbee[3] – Based on IEEE standard – Low-cost, low-power – Wireless mesh network 3

Motivation Build a multi-homing smart grid system in our campus Upon the failure of a single network interface, the device can switch to other network interface to continue its communication 4

Network Layer Protocol 6LoWPAN (IPv6 over Low Power Wireless Personal Area Networks)[4][5] – IPv6-based low-power wireless – Proposed by IETF working group applied in smart grid – Easily integrated with IP network 5

Transport Layer Protocol Overview of SCTP(Stream Control Transmission Protocol) – Multi-homing TCP connection is one-to-one between two network interfaces SCTP association is many-to-many between multiple network interfaces 6

System architecture 7

Component – LKSCTP Protocol Stack DMA-2440XP Platform Porting – DMA-2440XP platform running Linux 2.6 – Through the cross-platform development process. – The SCTP protocol stack adopted is LKSCTP(Linux Kernel Stream Control Transmission Protocol) – Cramfs file system was created by the busybox tool 8

Component – Atmel RZRAVEN USB Dongle Atmel RZRAVEN Development Board Porting – Install Contiki, and then cross-compile(avr-gcc) it to generate binary code. – Compile the RZUSBSTICK module – Through the JTAGICE mkII, the binary code can be uploaded to the AT90USB1287 microcontroller. 9

Multi-homing Experiments SCTP Multi-homing Experiment 1.Over Ethernet only(Single-homing) 2.Over both Ethernet and 6LoWPAN interfaces (Multi-homing) 10

Performance Analysis Data Measurement and Analysis Single-homing Transmission (blue: normal transmission packets; red: retransmission packets) Multi-homing Transmission (blue: normal transmission packets; red: retransmission packets) 11

Performance Analysis Single-homingMulti-homing Packets Duration (second) Avg. packets/sec Avg. packet size (bytes) Avg. bytes/sec Avg. Mbits/sec

Conclusion It will be applied to a Smart Grid system to deliver data through the SCTP protocol. – increase the data transmission efficiency – reduce packet retransmission In the future we may adopt Weighted Round Robin-Arrival Rate Dependent (WRR-ARD) algorithm to further improve the transmission performance 13