MULTIMEDIA SESSION NEGOTIATION METHOD, RELATED DEVICE AND SYSTEM

摘要

Disclosed are a multimedia session negotiation method, a related device and a system. The multimedia session negotiation method comprises: a called terminal receiving a first session negotiation message from a calling terminal, attribute parameters carried in a session description protocol (SDP) packet in the first session negotiation message containing a media parameter and a media redundancy parameter of at least two media; the called terminal selecting, according to a local session capability, an attribute parameter carried in the received SDP packet; the called terminal generating a new SDP packet according to the selected attribute parameter; and the called terminal sending the generated SDP packet to the calling terminal through a second session negotiation message. The technical solution provided in the present invention effectively solves the problem in the prior art that redundancy can only be performed on a single type of medium in a session.