# LoRaWAN duty cycle abuse

**URL:** <https://www.thethingsnetwork.org/forum/t/lorawan-duty-cycle-abuse/5945>\
**Category:** LoRaWAN Discussions\
**Created:** [March 9, 2017, 9:47am UTC](https://www.thethingsnetwork.org/forum/t/lorawan-duty-cycle-abuse/5945 "2017-03-09T09:47:28Z")\
**Posts on this page:** 5\
**Page:** 3

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**Author:** ![hobo](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/hobo/32/25844_2.png) [@hobo](https://www.thethingsnetwork.org/forum/u/hobo)\
**Post date:** [December 21, 2017, 10:39pm UTC](https://www.thethingsnetwork.org/forum/t/lorawan-duty-cycle-abuse/5945/42 "2017-12-21T22:39:30Z")

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> [@JTAG](#):
>
> Putting a wideband “high” power signal with a bandwidth and frequency matching an application (like gps / gsm / FM radio / wifi ) will block that application. Receiver blocking by an in-band interferer is a problem for 95% of every wireless link on the world.

Quite right, but that waht I’m talking about isn’t just trivial jamming.

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**Author:** ![hobo](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/hobo/32/25844_2.png) [@hobo](https://www.thethingsnetwork.org/forum/u/hobo)\
**Post date:** [December 21, 2017, 10:42pm UTC](https://www.thethingsnetwork.org/forum/t/lorawan-duty-cycle-abuse/5945/43 "2017-12-21T22:42:50Z")

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> [@Epyon](#):
>
> a TTN gateway, backer edition.

I’m thinking about getting ten units. Street lights are Class C nodes, with ten transmitters I most probably can legally block their RX2 🙂 Oh, I even don’t need GWs, ten half-Watt modules are enough… 🙂

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**Author:** ![JTAG](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jtag/32/26061_2.png) [@JTAG](https://www.thethingsnetwork.org/forum/u/JTAG)\
**Post date:** [December 21, 2017, 10:48pm UTC](https://www.thethingsnetwork.org/forum/t/lorawan-duty-cycle-abuse/5945/44 "2017-12-21T22:48:09Z")

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> [@hobo](#):
>
> Quite right, but that waht I’m talking about isn’t just trivial jamming.

> [@hobo](#):
>
> I’m thinking about getting ten units. Street lights are Class C nodes, with ten transmitters I most probably can legally block their RX2 🙂 Oh, I even don’t need GWs, ten half-Watt modules are enough… 🙂

Poteto potato 🤓.

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**Author:** ![JDP](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jdp/32/35697_2.png) [@JDP](https://www.thethingsnetwork.org/forum/u/JDP)\
**Post date:** [December 21, 2017, 10:55pm UTC](https://www.thethingsnetwork.org/forum/t/lorawan-duty-cycle-abuse/5945/45 "2017-12-21T22:55:43Z")

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> [@hobo](#):
>
> The real problem is that no one is actually obliged to follow LoRaWAN spec (or TTN fair access policy).

Neither LoRaWAN nor TTN fair-use policy has any teeth here. They are both advisory. But the regional regulations about ISM band use are controlled, either by duty cycle or AFA/LBT. If someone breaks those rules then it is illegal and they are open to prosecution.  
Like CE marking, its a complaint-driven process. If you complain enough, the local regulator should take action.

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**Author:** ![hobo](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/hobo/32/25844_2.png) [@hobo](https://www.thethingsnetwork.org/forum/u/hobo)\
**Post date:** [December 22, 2017, 12:05am UTC](https://www.thethingsnetwork.org/forum/t/lorawan-duty-cycle-abuse/5945/46 "2017-12-22T00:05:58Z")

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> [@JTAG](#):
>
> Poteto potato 🤓.

Start with googling for “lora preamble selectivity”, my dear electrical engineer and hobbyist. At the momement, LoRa seems to be double Dutch for you 🙂 Meditate, and you’ll reach you’ll reach enlightenment.

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