1 / 19

Enhancement to IEEE 802.15.4-2006 for Process Automation

This proposal aims to increase reliability and deterministic communication in industrial settings by enhancing IEEE 802.15.4-2006 with mesh+star topology and two-stage resource allocation. It introduces TDMA+FH/AFD during inactive periods and implements Link Layer Reliability for improved performance.

jacquesd
Télécharger la présentation

Enhancement to IEEE 802.15.4-2006 for Process Automation

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Enhancement to 802.15.4-2006 for Process Aotumation] Date Submitted: [10 Nov, 2008] Source: [Qin Wang / Peng Zeng], Company [University of Science & Technology Beijing/ Shenyang Institute of Automation-Chinese Academy of Sciences /] Address [ 30 Xueyuan Road, Beijing 100083, China] Phone: [+8610-62334781], FAX: [+8610-82372028 ], E-Mail: [ wangqin@ies.ustb.edu.cn] Re: [IEEE P802.15.4e Call For proposal] Abstract: [] Purpose: [This document is a response to Item a) better support the industrial markets in IEEE P802.15.SG4e Call for Application on 14 November, 2007] Notice: This document has been prepared to assist the IEEE P802.15. 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 P802.15. IEEE 802.15-08-0820-00-004e

  2. Enhancement to 802.15.4-2006 for Process Automation Qin Wang1) , Peng Zeng2) 1)University of Science & Technology Beijing 2) Shenyang Institute of Automation-Chinese Academy of Sciences 10 November 2008 wangqin@ies.ustb.edu.cn IEEE 802.15-08-0820-00-004e

  3. Objective • Increase reliability • Increase deterministic degree of end-to-end communication • Balance the fast communication for emergency information and the very low duty cycle communication for regular information • Compatible with IEEE 802.15.4-2006 device IEEE 802.15-08-0820-00-004e

  4. Propose (reference #619, #620) • Mesh+Star topology • Extended superframe • Two-stage resource allocation • TDMA+FH/AFD during scheduled period, i.e. inactive period of 15.4-2006 • Note: Difference between Adaptive Frequency Diversity (AFD) with Frequency Hopping (FH) • FH: Change communication channel according to a scheduled frequency hopping pattern, regardless how the real channel condition is. • AFD: Change communication channel according to the real channel condition. In another word, bad channel condition, which can be measured with packet drop rate or resend time, triggers the operation of changing channel. IEEE 802.15-08-0820-00-004e

  5. Link Layer Reliability Assume a complete communication includes transmitting a packet and receiving ACK. Then, the packet drop rate (PDR) measured at the transmitting side is used as the measurement of link layer reliability, i.e. IEEE 802.15-08-0820-00-004e

  6. Test 1 Test 2 C B Test 3 A IEEE 802.15-08-0820-00-004e

  7. Test 5 C A A Test 4 C B B IEEE 802.15-08-0820-00-004e

  8. IEEE 802.15-08-0820-00-004e

  9. PDR over time in school factory (4 hours) Different packet loss rate on different channels, low and high packet loss rate last for a relative long stable time on one channel ch9 ch10 ch11 ch12 ch13 ch14 ch15 ch16 ch1 ch2 ch3 ch4 ch5 ch6 ch7 ch8 Packet loss rate Packet loss rate time time IEEE 802.15-08-0820-00-004e

  10. PDR over time in Irion and steel factory (9hours) ch9 ch10 ch11 ch12 ch13 ch14 ch15 ch16 ch1 ch2 ch3 ch4 ch5 ch6 ch7 ch8 Packet loss rate Packet loss rate time time IEEE 802.15-08-0820-00-004e

  11. PDR over time in lab (17 hours) channels have correlations with each other, the same can be found at previous two tests ch9 ch10 ch11 ch12 ch13 ch14 ch15 ch16 ch1 ch2 ch3 ch4 ch5 ch6 ch7 ch8 Packet loss rate Packet loss rate time time IEEE 802.15-08-0820-00-004e

  12. Link Layer Statistic Model Divided channel condition into 5 state according PDR, and do statistic interference. IEEE 802.15-08-0820-00-004e

  13. Link layer PDR Generation IEEE 802.15-08-0820-00-004e

  14. Beacon of E-superframe 16 slot CAP CFP Intra-cluster Inter-cluster sleep Schedule period E-Superframe IEEE802.15.4 Superframe Beacon of 802.15.4 superframe 16 slot CAP CFP inactive SD BI E-Superframe IEEE 802.15-08-0820-00-004e

  15. TDMA+FH/AFD in scheduled period scheduled period CH1 CH2 CH3 CH4 CH5 CH6 CH7 Intra-cluster Sleeping Collect data from SNs Inter cluster & Manager period sleeping TDMA+ AFD TDMA+ FH The Inter cluster period and manager period are scheduled by the system manager. IEEE 802.15-08-0820-00-004e

  16. Channel change protocol IEEE 802.15-08-0820-00-004e

  17. Simulation setting： OMNet++ simulator; 8 sensor node，1 cluster head; PDR over time is generated according to the link layer statistic model FH sequence: 5, 6, 2, 8, 4, 1, 3, 7, 14, 13, 11, 12, 16, 9, 15, 10 AFD: randomly choose the next channel while current channel PDR>15% IEEE 802.15-08-0820-00-004e

  18. Summary • Increase reliability • Increase deterministic degree of end-to-end communication • Balance the fast communication for emergency information and the very low duty cycle communication for regular information • Compatible with IEEE 802.15.4-2006 device • Link Layer Statistic Model • Mesh+ Star topology • Extended Superframe • Two-stage resource allocation • Adaptive Frequency Diversity IEEE 802.15-08-0820-00-004e

  19. Thanks! IEEE 802.15-08-0820-00-004e

More Related