IEEE Std 802.15.4-2020 pdf free download

IEEE Std 802.15.4-2020 pdf free download.IEEE Standard for Low-Rate Wireless Networks.
To deallocate an existing DSME GTSs, the device shall send the DSME GTS Request command to the corresponding device. (The source or destination of which the DSME GTSs are to be deallocated.). The destination address of the command shall be set to the address of the corresponding device. The Management Type field shall be set to deallocation, and the DSME SAB Specification field shall be set to indicate the DSME GTSs to deallocate.
If a DSME GTS Response command with Management Type field set to deallocation is not received within the expected time, the MLME of the device shall notify the higher layer of the failure by the MLME-DSMEGTS.contirm primitive with a Status parameter set to NO_DATA.
On receipt of a DSME (ITS Request command with Management Type field set to deallocation, the device shall check the DSME GTSs specified for deallocation in the received command.
If the DSME GTSs in the command match one or more of the allocated DSME GTSs in macDsmeAct, the device shall notify the receipt of the command to the higher layer using MLME-DSME-GTS.indication. The higher layer makes the decision on the deallocation, and infoms MLME of its decision using MLMEDSME-GTS.response. Then, the device shall send a DSME (ITS Response command to the source device of the received command (i.e., the destination address is set to the short broadcast address, and the DSME GTS destination address is set to the short address of the source device). The Management Type field of the DSME (ITS Response command shall be set to deallocation, and the Dsme Gts Status field shall be set to approved. The DSME SAB Specification field shall be set to indicate the DSME (ITSs to deallocate.
If the DSME GTSs in the command do not match any of the allocated DSME GTSs in macDsnwAct, the device shall send a DSME GTS Response command to the source device of the received command (i.e., the destination address is set to the short address of the source device, and also the DSME GTS destination address is set to the short address of the source device). The Management Type field shall be set to deallocation, and the Dsrne Gts Status field shall be set to disapproved: unknown GTS. The DSME SAB Specification field shall be set to the same as the received command.
On receipt of a DSME GTS Response command with Management Type field set to deallocation, the device shall check the DSME GTS Destination Address field of the received command, If the DSME (ITS Destination address is the same as the rncwShor!IEEE Std 802.15.4-2020 pdf free download.