| 摘要 |
<p>The invention relates to a filtering method implemented by a server (ORIG) in an IMS network, comprising steps of: (E20) receiving an SIP invitation message emitted by an upstream entity (UA); (E30, E80) reserving two resources (MRF1, MRF2) with a server; (E40) sending an SIP response to the upstream entity (UA) comprising an SDP field identifying the first resource; (E90) sending, to at least one downstream entity, an SIP invitation message comprising an SDP field identifying the second resource; (E140) selecting a media flow (E120, F70) according to the SIP responses of type lxx; and (E150) controlling the resource server so that it restores the media flow in the first resource.</p> |
