# Downlink Being Resent Over and Over Again (V2)

**URL:** <https://www.thethingsnetwork.org/forum/t/downlink-being-resent-over-and-over-again-v2/36955>\
**Category:** End Devices (Nodes)\
**Created:** [May 12, 2020, 3:35pm UTC](https://www.thethingsnetwork.org/forum/t/downlink-being-resent-over-and-over-again-v2/36955 "2020-05-12T15:35:52Z")\
**Posts on this page:** 1\
**Showing post:** 12

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**Author:** ![arjanvanb](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/arjanvanb/32/46626_2.png) [@arjanvanb](https://www.thethingsnetwork.org/forum/u/arjanvanb)\
**Post date:** [May 14, 2020, 4:03pm UTC](https://www.thethingsnetwork.org/forum/t/downlink-being-resent-over-and-over-again-v2/36955/12 "2020-05-14T16:03:01Z")

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> [@czuvich](#):
>
> but re-authenticating is a fairly normal process in the HTTP world

As OTAA needs a downlink, and downlinks are very expensive (as gateways cannot listen while transmitting, and gateways need to adhere to things like duty cycles as well) and fragile (the device might not receive it), this simply does not apply to LoRaWAN. Also, a join would probably use more battery power than using some sleep to preserve state in memory?

Some modules simply don’t need a lot of power to preserve state in memory. Like:

> [@How often should a node do an OTAA Join, and is OTAA better than ABP?](https://www.thethingsnetwork.org/forum/t/how-often-should-a-node-do-an-otaa-join-and-is-otaa-better-than-abp/11192/48):
>
> For RN2483 devices with firmwares 1.0.3 and above sleep can be used just fine.

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