There is provided an intercell interference mitigation apparatus for use in a terminal having a single reception antenna in a multi-cell downlink of an OFDMA system. By sending probe packets on the bearer andor on a further bearer and receiving a response packets returned in response to the probe packets, a parameter corresponding to a time period between sending a probe packet and receiving the corresponding response packet can be measured. A material removing element passes within the cage to remove the plaque extending into the openings. A control box disposed on the undersurface of the board is equipped with a computer device and tone generator. Other embodiments may be described and claimed.