Skype Limited

Microsoft Technology Licensing, LLC

Marlon Gerardo Dumas

Konstantin Tretjakov

Jaak Vilo

Abel Armas-Cervantes

Ando Saabas

Luciano Garcia-Bañuelos

Volodymyr Floreskul

Luciano García-Bañuelos

The disclosure relates to of generating a data structure stored in a computer memory for use in performing a search query to determine a separation between nodes in a network of interconnected nodes, wherein the method comprises: selecting a set of landmark nodes from the network; and for at least two of the landmark nodes in the set; generating a path tree for each landmark node that indicates a separation between the landmark node and each of a plurality of nodes; wherein the generating is configured to limit the number of path trees each of said plurality of nodes may appear in to no more than a predetermined number of path trees. A method of processing a data structure is also disclosed.

Processing search queries using a data structure

A search query to provide a search result may be received, which identifies source and target nodes and an application for generating the search result. The application accesses a data structure holding landmark nodes, which store a shortest path tree in the form of a set of parent links. Each parent link can identify an adjacent vertex node in a shortest path between each node in the data structure and the landmark node. The location of the source node and the target node in the shortest path trees may be identified to the landmark node. For each landmark node, using the identified locations of the target node and source node, a measure of distance between the source node and the target may be generated. The landmark node with the shortest distance may be determined. A search result related to the shortest path tree of that landmark node may be provided.

Processing search queries in a network of interconnected nodes

According to an embodiment, there is provided a method of generating a data structure stored in computer memory for processing a search query in a network of interconnected nodes, wherein the method comprises selecting landmark nodes by the following steps and storing the selected landmark nodes in the data structure: sampling from the network nodes a first sample of vertex pairs, computing the shortest path for each vertex pair, each shortest path comprising a set of vertices between each vertex in the vertex pair; identifying a first landmark node which occurs in more of the shortest paths more often than any other vertex; removing from the network vertices shortest paths including the first landmark node and identifying a second landmark node which occurs in more of the remaining shortest paths than any other remaining vertex.

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Tartu, Estonia

Marlon Gerardo Dumas