doc.: IEEE 802.15-<doc#> <11 January, 2008r> doc.: IEEE 802.15-<doc#> Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Channel Hopping Over Superframe ] Date Submitted: [11 May, 2008] Source: [Jie Shen, Daoyuan Yao, Tao Xing, Liang Li] Company [Shanghai Institute of Micro-system and Information Technology, Vinno Technologies Inc.] Address [NO.865 Changning Road, Shanghai, 200050, China] Voice:[+86 21 6251 1070], FAX: [+86 21 6213 2314], E-Mail:[sqinghe@mail.sim.ac.cn,liang_1@vinnotech.com] Re: [IEEE 802.15.4e group] Abstract: [This document suggests a new solution adopting channel hopping over superframe to provide additional robustness in high interfering environments and enhance coexistence with other wireless networks] Purpose: [To promote discussion in IEEE802.15.4e Study Group] 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. Jie Shen, Daoyuan Yao, Tao Xing, Gu Ning <author>, <company>

<11 January, 2008r> doc.: IEEE 802.15-<doc#> Objectives To provide additional robustness in high interfering environments To enhance coexistence with other wireless networks and enable longer operational life for battery powered devices To smoothly switch over multi-channel without strict restriction on RF circuit To facilitate the co-existence with current 802.15.4 MAC devices To be flexible and scalable Slide 2 Page 2 <author>, <company>

doc.: IEEE 802.15-<doc#> <11 January, 2008r> doc.: IEEE 802.15-<doc#> Motivation The communication on one channel is easy to be interfered Interference exists among adjacent PANs in open environment Outgoing beacons and incoming beacon may collide if StartTimes are approximately at same time <author>, <company>

Modification Suggestion <11 January, 2008r> doc.: IEEE 802.15-<doc#> Modification Suggestion Reducing interference among adjacent PANs by multi-channel hopping with pseudo-random hop sequence on every superframe Beacons from coordinators are broadcasted on same channel which is specified by PAN Coordinator as a PAN being initialized Modifying the association primitive in order to support channel hopping and avoid beacon collision <author>, <company>

Channel Hopping on every Superframe Avoiding adjacent PANs collision through multi-channel hopping A,B,C represents new PAN coordinator

Beacon Collision Avoiding Avoid beacons collision through slot multiplex

doc.: IEEE 802.15-<doc#> <11 January, 2008r> doc.: IEEE 802.15-<doc#> 7 May, 2008 Thank you! SIMIT <author>, <company>