The best replacement for 802.11 is bluetooth.

The best alternatives to 802.11 are rated as following:
★★★★★  bluetooth
★★★★★  802.16
★★★★  802.15
★★★★  802.3
★★★  wifi
★★  803.11
★  801.11
★  802.1x
★  nv2
★  wsn
★  802.11b
★  hiperlan2
  802.11g
  hiperlan 2
  hiperlan
  uwb

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No companions for 802.11 have been suggested so far.
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Google Trends

Scale is based on the average worldwide traffic of 802.11 in all years. Click on graph for more.
802.11
bluetooth
802.16