Data transmission method and apparatus

The invention discloses a data transmission method. The data transmission method comprises the following steps: when an IP node receives service data, extracting a node identifier of a destination node carried in the service data; and when the node identifier of the destination node is the same as the node identifier of the IP node, obtaining stored connection information of an Ad Hoc node associated with the IP node; and transmitting the service data to the associated Ad Hoc node based on the Ad Hoc network according to the connection information. The invention further discloses a data transmission apparatus. By adoption of the data transmission method and apparatus, the cost of realizing an instant messaging function of a mobile terminal is reduced. 本发明公开了种数据传输方法，所述数据传输方法包括：在IP节点接收到业务数据时，提取所述业务数据携带的目的节点的节点标识；在目的节点的节点标识与所述IP节点的节点标识相同时，获取储存的所述IP节点所关联的Ad Hoc节点的连接信息；根据所述连接信息，基于Ad Hoc网络将所述业务数据传输至关联的Ad Hoc节点。本发明还公开了种数据传输装置。本发明能够降低移动终端实现即时通讯功能的成本。