Patent ID: 8009664
Filing Date: 2011-08-30
Classification: H04L

Abstract:
1. A method for exchanging media description information between user agents using a session initiation protocol (SIP), the method comprising: providing information on an operating system (OS) and a sound module, which is defined by the OS, of a first user agent so that the first user agent generates an SIP message comprising, in a media description field of a session description protocol (SDP), the information on the OS and the sound module of the first user agent, and the first user agent sends the SIP message to a second user agent; and setting a processing format for voice data of the second user agent by the second user agent determining a voice data format supportable by the first user agent from the information on the OS and the sound module of the first user agent in the SIP message sent by the first user agent, comparing the voice data format supportable by the first user agent with the processing format for voice data of the second user agent, and setting a format commonly supportable by the first user agent and the second user agent as the processing format for voice data of the second user agent.