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remove extranious note

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Garth Vander Houwen 2022-07-12 07:03:22 -07:00
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docs/developers/Firmware/mesh-alg.mdx
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@ -73,7 +73,3 @@ If a transmitting node does not receive an ACK (or NAK) packet after a certain e
Given our use-case for the initial release, most of our protocol is built around [flooding](<https://en.wikipedia.org/wiki/Flooding_(computer_networking)>). The implementation is currently 'naive' and doesn't try to optimize flooding, except by abandoning retransmission once a node has seen a nearby receiver ACK the packet it's trying to flood. This means that up to N retransmissions of a packet could occur in an N node mesh. Given our use-case for the initial release, most of our protocol is built around [flooding](<https://en.wikipedia.org/wiki/Flooding_(computer_networking)>). The implementation is currently 'naive' and doesn't try to optimize flooding, except by abandoning retransmission once a node has seen a nearby receiver ACK the packet it's trying to flood. This means that up to N retransmissions of a packet could occur in an N node mesh.
If any mesh node sees a packet with a HopLimit other than zero, it will decrement that HopLimit and attempt retransmission on behalf of the original sending node. In order to promote letting nodes that are further away flood the message, such that the message eventually reaches farther, the contention window (see Layer 1) for a flooding message depends on the Signal-to-Noise Ratio (SNR) of the received packet. The CW size is small for a low SNR, such that nodes that are further away are more likely to flood first and closer nodes that hear this will refrain from flooding. If any mesh node sees a packet with a HopLimit other than zero, it will decrement that HopLimit and attempt retransmission on behalf of the original sending node. In order to promote letting nodes that are further away flood the message, such that the message eventually reaches farther, the contention window (see Layer 1) for a flooding message depends on the Signal-to-Noise Ratio (SNR) of the received packet. The CW size is small for a low SNR, such that nodes that are further away are more likely to flood first and closer nodes that hear this will refrain from flooding.
:::note
A node being in router mode will have a CW size that is a fraction of that of a normal node at the same SNR, such that it is more likely to flood first. For an explanation of what router mode does additionally, see [settings](/docs/settings/router#enabledisable-router-mode).
:::