1. A method of calculating a single, fused sensor glucose value based on respective glucose measurement signals of a plurality of redundant sensing electrodes, comprising: performing respective electrochemical impedance spectroscopy (EIS) procedures for each of the plurality of redundant sensing electrodes to obtain values of at least one impedance-based parameter for each said sensing electrode; measuring the electrode current (Isig) for each of the plurality of redundant sensing electrodes; calculating a bound-check reliability index and a noise-check reliability index for each said sensing electrode based on said measured Isig and said values of the at least one impedance-based parameter; calculating a dip reliability index for each said sensing electrode based on one or more of said at least one impedance-based parameter; calculating a sensitivity-loss reliability index for each said sensing electrode based on one or more of said at least one impedance-based parameter; calculating a single fused Isig based on the respective bound-check reliability index, noise-check reliability index, dip reliability index, sensitivity-loss reliability index, and respective Isig of each of the plurality of redundant sensing electrodes; and calibrating said single fused Isig to obtain said single fused sensor glucose value.