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