Issue link: https://read.uberflip.com/i/1467095
LoRaWAN ® IPv6 Adaptation Layer Specification TS010-1.0.0 ©2022 LoRa Alliance ® Page 15 of 15 The authors reserve the right to change specifications without notice. The retransmission can cut a tile with the new MTU. Inactivity_Timer for class A end- devices The recommended value, per [RFC9011], is 36 hours. - The timer should be adapted to the rate of transmission. Retransmission _timer for class A end-devices The recommended value, per [RFC9011], is INACTIVITY_TIMER/(MAX_A CK_REQUESTS + 1). - The timer should be adapted to the application. Inactivity_Timer for class B end- devices The recommended value, per [RFC9011], is 12 hours. - The timer should be adapted to the application. Retransmission _timer for class B end-devices The recommended value, per [RFC9011], is 3 times the ping slot periodicity. - The timer should be adapted to the application. Inactivity_Timer for class C end- devices The recommended value, per [RFC9011], is 12 hours. - The timer should be adapted to the application. Retransmission _timer for class C end-devices The recommended value, per [RFC9011], is 30 seconds. - The timer should be adapted to the application. Table 4: SCHC parameters used in unicast downlink fragmentation 276 Table 5 presents the SCHC parameters used in multicast downlink fragmentation: 277 Parameter Value and Size for Use with LoRaWAN [RFC9011] Notes Regarding Usage with LoRaWAN RuleID The recommended value is 21 (on 8 bits), named FPortDown. - The RuleID for downlink fragmentation can be different from the recommended value but must be different from the uplink fragmentation RuleID. Fragmentation mode (multicast) No-ACK - No SCHC ACK is ever sent. The reassembled packet is silently dropped if the cyclic redundancy check (CRC) fails. Windows Windows are not used in No- ACK mode. FCN The size of the FCN field is 1 bit. - An FCN value of 1 signals the last fragment. Table 5: SCHC parameters used in multicast downlink fragmentation 278