| 摘要 |
Embodiments of the present invention disclose a technical solution for session modifying via SDP session description in communication network system. One network equipment determines a target attribute to be modified in the session; generating an SDP offer message with SDP description information that is adapted for identifying modification to the target attribute. Network equipment receiving the SDP offer message can do selective modification based on the SDP description information, omitting the modification to irrelevant attributes. The SDP description information can be defined as a SDP extension attribute, which is set in the media stream in the session as a media-level attribute. The technical solution can achieve selective modification to the target attributes in the SDP session, and avoid changing other attributes than the target attribute in the session by mistake and therefore impacting on normal media stream communication. |
