Issue link: https://read.uberflip.com/i/1428395
LoRaWAN ® L2 1.0.4 Specification © 2020 LoRa Alliance ® Page 63 of 90 The authors reserve the right to change specifications without notice. Bits 7:3 [2:0] PingSlotParam RFU Periodicity Table 63: PingSlotParam field format 1918 1919 1920 1921 The Periodicity subfield is an unsigned 3-bit integer encoding the ping-slot period 1922 currently used by the end-device using the following equations: 1923 pingNb = 2 7- Periodicity and pingPeriod = 2 5+ Periodicity slots. 1924 1925 The actual ping-slot periodicity will be 0.96 × 2 Periodicity s. 1926 Periodicity=0 means that the end-device opens a ping slot approximately every 1s 1927 during the BEACON_WINDOW interval. 1928 Periodicity=7 means that the end-device opens a ping slot approximately every 128s, 1929 which is the maximum ping-slot period supported by the LoRaWAN Class B specification. 1930 To change its ping-slot periodicity, an end-device SHALL first revert to Class A. Next it SHALL 1931 send the new periodicity through a PingSlotInfoReq command. Then it SHALL receive an 1932 acknowledge from the server through a PingSlotInfoAns. Only then MAY the end-device 1933 switch back to Class B with the new periodicity. 1934 This command MAY be concatenated with any other MAC command in the FOpts field of 1935 FHDR, as described in the Class A specification frame format. 1936 Upon receiving this PingSlotInfoReq command, the Network Server SHALL answer with a 1937 PingSlotInfoAns frame. The MAC payload of this frame is empty. 1938 12.2 BeaconFreqReq 1939 This command is sent by the server to the end-device to modify the frequency on which this 1940 end-device expects the beacon. 1941 1942 Octets 3 BeaconFreqReq payload Frequency Table 64: BeaconFreqReq payload format 1943 1944 1945 1946 The Frequency coding is identical to the NewChannelReq MAC command defined for 1947 Class A. 1948 A valid non-zero Frequency SHALL force the end-device to listen to the beacon on a fixed 1949 frequency channel, even if the default behavior specifies a frequency hopping beacon (i.e. US 1950 ISM band). 1951 A value of 0 instructs the end-device that it SHALL use the default beacon frequency plan as 1952 defined in Section 13.1. Where applicable, the end-device SHALL resume a frequency 1953 hopping beacon search. 1954