The invention discloses a multi-communication group fusion holding method and
system for an intelligent door lock, and the method comprises the steps: building an independent
multicast tree taking a
feature vector as an identifier according to a communication group request initiated by each main control door lock; generating a
multicast message containing a target communication group
feature vector and a
digital signature according to a merging request sent by the first master control door lock; according to feature vectors exchanged by the master control door locks of the two parties through a
secure channel, a target master control door lock initiates feature interception registration, and negotiates and establishes a boundary feature tag
rewriting rule; and according to the established forwarding path and the
rewriting rule, the audio and video streams of the communication groups of the two parties are subjected to feature tag
rewriting through the network boundary
router, and then bidirectional intercommunication is realized. By utilizing the embodiment of the invention, the dynamic security isolation and seamless fusion of multiple communication groups can be realized, the network load and
transmission delay are reduced, meanwhile, the terminal door lock can realize audio and video intercommunication without sensing the
network address of the opposite end or changing the configuration, and the expansibility, the security and the user experience of the
system are improved.