Wikipedia:
https://en.wikipedia.org/wiki/Packet_radio
https://en.wikipedia.org/wiki/Wireless_ad_hoc_network
Popular product for purchase:
https://gotennamesh.com/products/mesh?gclid=CjwKCAjwoc_8BRAcEiwAzJevtc5fVoIndWpFxAE1iKc0szP-CqD3gt6VThVwAMH8GIKZfE_58xwkfBoCFwEQAvD_BwE&gclsrc=aw.ds
Research papers I can't yet access:
https://ieeexplore.ieee.org/document/6980396
https://ieeexplore.ieee.org/document/806983
Some research papers I could get cached here:
https://cloud.rosiesworkshop.net/s/PctCQ2mqrAeq5Lt
Similar but unhelpful DIY projects:
https://www.youtube.com/watch?v=zXTEWFb_6w4
https://hackaday.io/project/164092-npr-new-packet-radio
Similar but unhelpful non-profit projects:
http://hamwan.org/
https://wiki.ampr.org/wiki/Main_Page