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Project: IEEE P802.15 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
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Project: IEEE P802.15 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 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. Adrian P Stephens, Mobilian Corporation
LMP Command Discussion • Agenda • Nature of channel metrics reporting • LMP Commands Adrian P Stephens, Mobilian Corporation
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-or-unknown vs bad (i.e. reports only definitely bad channels) Adrian P Stephens, Mobilian Corporation
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 ?? Adrian P Stephens, Mobilian Corporation
Directed Signaling • All LMP commands regarding AFH are directed • Reliability & simplicity • Reduced overhead over broadcast in typical small piconets & interference levels Adrian P Stephens, Mobilian Corporation
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 Adrian P Stephens, Mobilian Corporation
LMP_disable_AFH command • Guess what this does Adrian P Stephens, Mobilian Corporation
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 Adrian P Stephens, Mobilian Corporation
Behaviour • Legacy & non-AFH • AFH-disabled (initial state of a link) • AFH-enabled Adrian P Stephens, Mobilian Corporation
Behaviour • SNIFF & HOLD • AFH-enabled state unaffected • PARK • Slave is implicitly AFH-disabled on unpark Adrian P Stephens, Mobilian Corporation
Broadcast • Beaconing & access windows – non-AH • Broadcast to active slaves – restricted slots (unadapted good channels) • Broadcast to all: Both mechanisms must be used Adrian P Stephens, Mobilian Corporation