A method, corresponding apparatuses, and a computer program product for enhancing small cell mobility are provided. The method comprises measuring a first channel quality level in a primary serving cell over a primary component carrier. The method also comprises measuring a second channel quality level in a secondary serving cell over a secondary component carrier. The method further comprises performing neighbor cell measurement on a list of frequency carriers if the first channel quality level is higher than a first threshold value and the second channel quality level is lower than a second threshold value. With the claimed inventions, small cell layer's neighbor cell measurement would be also triggered by SCell's quality degradation, which may result in less UE power consumption. Further, measurement gap is used more economically and causes less impact on UE's data rate and throughput.