1. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Additional channel mapping] Date Submitted: [25 November, 2004] Source: [Robert Cragie] Company [Jennic Ltd.] Address [Furnival Street, Sheffield, S1 4QT, UK] Voice:[+44 114 281 4512], FAX: [+44 114 281 2951], EMail:[rcc@jennic.com] Re: [Response to the call for proposal of IEEE 802.15.4b, PHY Enhancement] Abstract:[Discussion for several potential enhancements for current IEEE 802.15.4 PHY] Purpose:[For the discussion at IEEE 802.15.4b 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.

2. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 2 Additional channel mapping Robert Cragie Jennic Limited

3. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 3 Acknowledgements Colin Lanzl for suggesting channel pages Phil Beecher for suggesting the use of the 5 MS bits for page selection in a channel bitmap

4. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 4 Introduction Additional PHYs introduce a requirement for more channels Current limitation is 32 due to use of 32 bit channel bitmap Only 5 more channels available using current scheme Introduce pages of channels Use 5 upper MSBs of 32 bit channel bitmap to specify channel page 27 LSBs indicate channel as is done currently

5. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 5 Backwards compatibility Page 0 is the current channel mapping –Channel 0 is in 868 MHz band –Channels 1 to 10 are in 915 MHz band –Channels 11 to 26 are in 2.4 GHz band Pages 1 to 31 are for future definitions Up to 27 channels in each channel page New pages will also have fixed logical channel to physical frequency and modulation scheme mapping like page 0

6. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 6 PHY PIB changes Add extra attributes –phyPagesSupported –phyCurrentPage Modify existing attributes –phyChannelsSupported

7. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 7 phyPagesSupported Bitmap of which pages are supported by the PHY Read-only attribute 32 bits in bitmap Similar to phyChannelsSupported Used in conjunction with phyChannelsSupported to identify all channels supported

8. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 8 phyCurrentPage Integer indicating which page supported by the PHY is current Range 0 - 31 Similar to phyCurrentChannel Used in conjunction with phyCurrentChannel to uniquely identify channel

9. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 9 phyChannelsSupported Becomes an array Dimension of array equal to the number of pages supported

10. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 10 How many pages per PHY? 1.Each PHY can support single page only –27 channels per device 2.Each PHY can support up to multiple pages (up to 31 pages) –Up to 837 channels per device Is it possible to imagine a PHY supporting more than 27 channels?

11. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 11 Single page support PHY implements physical channels on one page only phyPagesSupported carries one set bit only phyCurrentPage effectively becomes a read-only attribute phyChannelsSupported has array dimension of 1 Very little extra complexity over current scheme

12. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 12 Multiple page support PHY implements physical channels on multiple pages phyPagesSupported may carry up to 32 set bits phyCurrentPage is read-write attribute and is used as part of channel selection phyChannelsSupported becomes array dimension of up to 32

13. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 13 Channel bitmap Channel bitmap is used for scanning and to indicate supported channels in the PHY Bits 27 to 31 are currently reserved and set to 0 0 0Channel bitmap 272631 0 PageChannel bitmap 272631 For scanning, utilise these bits to select a different page for multiple page support

14. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 14 Extension of ScanChannels To scan channels spanning multiple pages, higher layer simply has to submit multiple MLME-SCAN.requests and record the results accordingly Upper 5 MSBs will indicate which page of channels to scan in each case UnscannedChannels will be represented similarly

15. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 15 Extension of LogicalChannel All MLME primitives containing a LogicalChannel parameter will also need to have a ChannelPage parameter –MLME-ASSOCIATE.request –MLME-START.request –MLME-SYNC.request Command frames containing a LogicalChannel parameter will also need to have a ChannelPage parameter –Coordinator realignment frame PAN descriptor will need a ChannelPage parameter

16. doc.: IEEE 802.15-04-0685-00-004b Submission November 2004 Robert Cragie, Jennic Ltd.Slide 16 PIB and constants change PIB and constant values which are dependent on phyCurrentChannel will need to be considered –macAckWaitDuration –macBattLifeExtPeriods