a mobile subscriber station and an active base station for measuring / reporting a channel quality in a broadband wireless access communication system . the mss includes a receiver for receiving , from an active bs , channel quality measurement information for the mss to measure channel qualities of the active bs and a plurality of neighbor bss , and channel quality report information defining a report mode for the mss to report measured channel qualities of the active bs and the plurality of neighbor bss , a processor for measuring the channel qualities of the active bs and the plurality of neighbor bss according to the channel quality measurement information , and a transmitter for reporting the measured channel qualities of the active bs and the plurality of neighbor bss to the active bs according to the channel quality report information .