Patent ID: 8010049
Filing Date: 2011-08-30
Classification: H04L,H04W

Abstract:
1. A sub band notification method for notifying a base station from a terminal of an optimum sub band that is determined based on radio link quality of a plurality of sub bands, comprising: measuring the radio link quality of a terminal for a current sub band which is currently assigned to the terminal and the radio link quality of the terminal for a sub band on each side of the current sub band; comparing said link quality of each sub band, and generating sub-band-change-request data that specifies that the optimum sub band is a sub band having a higher frequency than the current sub band, or a sub band having a lower frequency; transmitting said sub-band-change-request data to the base station; and specifying by said sub-band-change-request data whether said optimum sub band is the nth adjacent sub band having a higher frequency than the current sub band, or the nth adjacent sub band having a lower frequency, and setting the value of n to a fixed value, or controlling the value of n according to the radio link quality.