Scanning neighboring base stations in wireless access system

A base station configured to scan neighboring base stations for measuring channel quality in a wireless communication system, the base station comprising:

• means for transmitting information associated with at least one neighboring base station to a mobile subscriber station;
• means for receiving a scanning request message from the mobile subscriber station to the serving base station, the scanning request message comprising a requested scan duration, a requested interleaving interval and a requested scan iteration, wherein the requested scan iteration indicates a requested number of iterating scanning interval for scanning of the at least one neighboring base station, and wherein the requested interleaving interval is interleaved between scanning intervals;
• and
• means for transmitting a scanning response message to the mobile subscriber station in response to the scanning request message, the scanning response message comprising an allowed scan duration, an allowed interleaving interval and an allowed scan iteration, wherein the allowed scan iteration indicates an allowed number of iterating scanning interval for scanning of the at least one neighboring base station, and wherein the allowed interleaving interval is interleaved between the scanning intervals.