Solid state storage device and patrol read method using word line groupings thereof

A patrol read method using word line groupings, for use in a solid-state storage device, wherein the solid-state storage device comprises a controller and a non-volatile memory, the non-volatile memory comprises a plurality of blocks, each block comprises a plurality of word lines, and each word line has a corresponding read threshold voltage, the method comprising:

• utilizing the controller to select a first word line group from a plurality of word line groups, wherein the plurality of word line groups are obtained by classifying the word lines based on the read threshold voltage of each word line, and a representative word line corresponding to each word line group is set based on the read threshold voltage associated with each word line group;
• utilizing the controller to use the read threshold voltage of a first representative word line corresponding to the first word line group to read page data of the first representative word line;
• and
• when the controller cannot correctly read the page data of the first representative word line using the read threshold voltage of the first representative word line, utilizing the controller to update the read threshold voltage of the first representative word line in the first word line group;
• wherein the read threshold voltage corresponding to each word line in each block is input to a neural network, and the neural network is configured to establish a topological space using the read threshold voltage corresponding to each word line in each block, and classify the read threshold voltages within the topological space into a plurality of groups, wherein the groups correspond to the word line groups.