Contact matching method, instant messaging client, server and system

A server for establishing an instant messaging group, comprising:

• one or more processors;
• memory;
• and
• a plurality of programs stored in the memory and to be executed by the one or more processors, the programs including instructions for:
• receiving, from each of a plurality of mobile devices, audio data generated by the mobile device and a user identifier associated with the mobile device, and associating, with the audio data, a timestamp indicative of receipt of the audio data at the server;
• selecting, among a plurality of user identifiers, a subset of user identifiers whose corresponding audio data and timestamps satisfy predefined similarity criteria, wherein:
• the subset of user identifiers includes a first user identifier associated with a first mobile device, a second user identifier associated with a second mobile device, and a third user identifier associated with a third mobile device;
• the predefined similarity criteria require that (i) the timestamps of the audio data corresponding to the subset of user identifiers be within a predefined time scope and (ii) the audio data corresponding to the subset of user identifiers have frequency characteristics within a predefined frequency characteristic range;
• sending, to the first mobile device, an instant messaging group establishment prompt message including the second user identifier and the third user identifier;
• and
• establishing an instant messaging group including the first user identifier, the second user identifier, and the third user identifier after receiving an instant messaging group establishment request message from an instant messaging client associated with the first mobile device.

A non-transitory computer readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a server with one or more processors and memory, cause the server to:

• receive, from each of a plurality of mobile devices, audio data generated by the mobile device and a user identifier associated with the mobile device, and associating, with the audio data, a timestamp indicative of receipt of the audio data at the server;
• select, among a plurality of user identifiers, a subset of user identifiers whose corresponding audio data and timestamps satisfy predefined similarity criteria, wherein:
• the subset of user identifiers includes a first user identifier associated with a first mobile device, a second user identifier associated with a second mobile device, and a third user identifier associated with a third mobile device;
• the predefined similarity criteria require that (i) the timestamps of the audio data corresponding to the subset of user identifiers be within a predefined time scope and (ii) the audio data corresponding to the subset of user identifiers have frequency characteristics within a predefined frequency characteristic range;
• send, to the first mobile device, an instant messaging group establishment prompt message including the second user identifier and the third user identifier;
• and
• establish an instant messaging group including the first user identifier, the second user identifier, and the third user identifier after receiving an instant messaging group establishment request message from an instant messaging client associated with the first mobile device.