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6.3.5 Device discovery............................................................................................................ 86
6.3.6 TSCH PAN formation ................................................................................................... 86
6.4 Association and disassociation .................................................................................................... 87
6.4.1 Association..................................................................................................................... 87
6.4.2 Disassociation ................................................................................................................ 90
6.4.3 Fast association .............................................................................................................. 92
6.5 Synchronization ........................................................................................................................... 93
6.5.1 General........................................................................................................................... 93
6.5.2 Synchronization with beacons ....................................................................................... 93
6.5.3 Synchronization without beacons .................................................................................. 95
6.5.4 Synchronization in TSCH PAN..................................................................................... 95
6.5.4.1 Timeslot communication ............................................................................. 96
6.5.4.2 Node synchronization .................................................................................. 97
6.5.5 Orphaned device realignment ........................................................................................ 98
6.6 Transaction handling.................................................................................................................... 98
6.7 Transmission, reception, and acknowledgment........................................................................... 99
6.7.1 Transmission.................................................................................................................. 99
6.7.2 Reception and rejection ............................................................................................... 101
6.7.3 Extracting pending data from a coordinator ................................................................ 102
6.7.4 Use of acknowledgments and retransmissions ............................................................ 104
6.7.4.1 No acknowledgment .................................................................................. 104
6.7.4.2 Acknowledgment ....................................................................................... 105
6.7.4.3 Retransmissions ......................................................................................... 106
6.7.5 Transmission timing restrictions.................................................................................. 106
6.7.6 Guard time ................................................................................................................... 107
6.7.7 Promiscuous mode....................................................................................................... 109
6.7.8 Transmission scenarios ................................................................................................ 109
6.7.9 Device announcement.................................................................................................. 110
6.8 GTS allocation and management...............................................................................................111
6.8.1 GTS general requirements ........................................................................................... 111
6.8.2 CAP maintenance ........................................................................................................ 112
6.8.3 GTS allocation ............................................................................................................. 112
6.8.4 GTS usage.................................................................................................................... 113
6.8.5 GTS deallocation ......................................................................................................... 114
6.8.6 GTS reallocation ..........................................................................................................115
6.8.7 GTS expiration............................................................................................................. 117
6.9 Ranging.....................................................
................................................................................. 117
6.9.1 Ranging requirements .................................................................................................. 117
6.9.2 Set-up activities before a ranging exchange ................................................................ 117
6.9.3 Finish-up activities after a ranging exchange .............................................................. 117
6.9.4 Managing DPS............................................................................................................. 118
6.9.5 The ranging exchange.................................................................................................. 119
6.10 PHY parameter change notification procedure.......................................................................... 120
6.10.1 Signaling using Beacon frames.................................................................................... 120
6.10.2 Signaling using multipurpose frames .......................................................................... 120
6.11 Deterministic and synchronous multi-channel extension (DSME) ........................................... 121
6.11.1 DSME command requirements.................................................................................... 121
6.11.2 DSME multi-superframe structure............................................................................... 121
6.11.3 Channel diversity ......................................................................................................... 123
6.11.3.1 Channel adaptation .................................................................................... 123
6.11.3.2 Channel hopping ........................................................................................ 124
6.11.4 CAP reduction.............................................................................................................. 126
6.11.5 DSME GTS allocation and management..................................................................... 126
6.11.5.1 DSME GTS allocation ............................................................................... 127
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