Similarity calculating method and apparatus

A similarity calculating apparatus, comprising:

• a data extracting unit configured to extract similarity calculating data, which is determined in advance, by receiving a communication activity record for every user;
• a static feature modeling unit configured to model a communication activity pattern for every user by calculating a value of a static feature from the extracted similarity calculating data;
• a dynamic feature modeling unit configured to model common information between the users by calculating a value of a dynamic feature from the extracted similarity calculating data;
• and
• a similarity calculating unit configured to calculate a similarity between the users using the modeled communication activity pattern and the modeled common information, wherein the similarity calculating unit includes:
• a static similarity calculating unit configured to calculate a static similarity for every user using elements of the static feature to which the modeled communication activity pattern is reflected,
• a dynamic similarity calculating unit configured to calculate a dynamic similarity using the modeled common information for each element of the dynamic feature for every user, and
• a final similarity calculating unit configured to calculate the similarity between the users using the calculated static similarity and the calculated dynamic similarity.