Co-existence of single radio voice call continuity (srvcc) solutions

The invention claims a method for realizing communication system supporting packet switching voice of the first wireless access network of the source cell and supporting at least a circuit switched speech sound in the second wireless access network the target cell between the single radio voice call continuity of the sr vcc solving project of the coexistence of the node. The node is used for passing through the basis of target cell in the double transmission mode packet switched handover and internet protocol on the voice related to increase the support of related information of the voice bearing from the speech carrier are separated to perform load split.