TDMA for ordinary 802.11a/b/g/n hardware is here
NETSHe Lab Ltd. has implemented time division multiply access for ordinary 802.11a/b/g/n hardware.
Presentation at http://www.netshe.ru/files/doc/en/netshe_tdma_pres_en.pdf provides brief overview for the implementation.
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NETSHe Lab Ltd. presents time division multiply access (TDMA) implementation for ordinary 802.11 a/b/g/n equipment
Goal TDMA advantages in comparison with the CSMA/CA