November 2001 doc IEEE 802 15 01516 r
November 2001 doc. : IEEE 802. 15 -01516 r 0 Project: IEEE P 802. 15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: LMP Command Discussion Date Submitted: November 13, 2001 Source: Adrian P Stephens, Mobilian Corporation Company: Mobilian Corporation Address: NW Evergreen Pkwy. Hillsboro, OR. USA. Email: adrian. stephens@mobilian. com Abstract: This document contains a framework for discussion of the LMP commands necessary to manage AFH. Purpose: To stimulate discussion. Notice: This document has been prepared to assist the IEEE P 802. 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 P 802. 15. Submission 1 Adrian P Stephens, Mobilian Corporation
November 2001 doc. : IEEE 802. 15 -01516 r 0 LMP Command Discussion • Agenda – Nature of channel metrics reporting – LMP Commands Submission 2 Adrian P Stephens, Mobilian Corporation
November 2001 doc. : IEEE 802. 15 -01516 r 0 Channel Metrics reporting • Optional behaviour at both Master and Slave • Slave reports capability to master • Slave channel metrics reporting is enabled/disabled by the master • Slave is limited by a minimum report interval specified by the master • Slave characterises channels as good-orunknown vs bad (i. e. reports only definitely bad channels) Submission 3 Adrian P Stephens, Mobilian Corporation
November 2001 doc. : IEEE 802. 15 -01516 r 0 Capability Exchange • Additional fields in the existing features structure (2 or 3 bits needed) • Existing LMP_features req/res commands suffice • AFH supported capability • Channel metrics supported capability • Partition-mapping capability ? ? Submission 4 Adrian P Stephens, Mobilian Corporation
November 2001 doc. : IEEE 802. 15 -01516 r 0 Directed Signaling • All LMP commands regarding AFH are directed – Reliability & simplicity – Reduced overhead over broadcast in typical small piconets & interference levels Submission 5 Adrian P Stephens, Mobilian Corporation
November 2001 doc. : IEEE 802. 15 -01516 r 0 LMP_set_AFH command • • Master -> Slave Specifies a mask of used/unused channels Implicitly enables AFH operation by the slave Will also need to specify partition-mapping enabled/disabled state if this is optional Submission 6 Adrian P Stephens, Mobilian Corporation
November 2001 doc. : IEEE 802. 15 -01516 r 0 LMP_disable_AFH command • Guess what this does Submission 7 Adrian P Stephens, Mobilian Corporation
November 2001 doc. : IEEE 802. 15 -01516 r 0 LMP_channel_metrics • LMP_channel_metrics_req – Master->Slave – Enabled/Disabled – Minimum reporting interval • LMP_channel_metrics_res – Slave->Master – Channel map – Over < last 10 s measurements Submission 8 Adrian P Stephens, Mobilian Corporation
November 2001 doc. : IEEE 802. 15 -01516 r 0 Behaviour • Legacy & non-AFH • AFH-disabled (initial state of a link) • AFH-enabled Submission 9 Adrian P Stephens, Mobilian Corporation
November 2001 doc. : IEEE 802. 15 -01516 r 0 Behaviour • SNIFF & HOLD – AFH-enabled state unaffected • PARK – Slave is implicitly AFH-disabled on unpark Submission 10 Adrian P Stephens, Mobilian Corporation
November 2001 doc. : IEEE 802. 15 -01516 r 0 Broadcast • Beaconing & access windows – non-AH • Broadcast to active slaves – restricted slots (unadapted good channels) • Broadcast to all: Both mechanisms must be used Submission 11 Adrian P Stephens, Mobilian Corporation
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