Program for selecting an optimum access point in {HEAD ~ a wireless network} on {TAIL ~ a common channel} 
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Program for selecting an optimum access point in { HEAD ~ a wireless network } on { TAIL ~ a common channel }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL