A data transmission method in a wireless network architecture supporting a multimedia broadcast/multicast service, MBMS, including on a core network side: a terrestrial radio access network (102, 202, 402) connected to a multimedia broadcast/multicast service, MBMS, functional entity comprising a multimedia/broadcast/multicast service center (105, 405), BMSC, and a multimedia broadcast/multicast service gateway (104, 404), MBMS GW, and on a local side: a local application server (205, 406) connected to a local multimedia broadcast/multicast service, MBMS, functional entity (206, 407), the local MBMS functional entity being connected to the BMSC on the network side, the wireless network architecture including the MBMS functional entity, the local MBMS functional entity and the local application server, and the local MBMS functional entity, comprising the following steps: obtaining, by the local multimedia broadcast/multicast service, MBMS, functional entity on the local side, local MBMS bearer information from the MBMS functional entity on the core network side; receiving, by the local MBMS functional entity, application layer data from the local application server; determining, by the local MBMS functional entity based on the obtained local MBMS bearer information, local MBMS bearer information matching the application layer data; and sending, by the local MBMS functional entity, the application layer data based on the matched local MBMS bearer information; wherein wherein the determining, by the local MBMS functional entity, local MBMS bearer information matching the application layer data comprises: obtaining, by the local MBMS functional entity, a destination IP address of the application layer data; and if the local MBMS bearer information comprises the destination IP address of the application layer data, using the local MBMS bearer information comprising the destination IP address of the application layer data, as the matched local MBMS bearer information. on a core network side: a terrestrial radio access network (102, 202, 402) connected to a multimedia broadcast/multicast service, MBMS, functional entity comprising a multimedia/broadcast/multicast service center (105, 405), BMSC, and a multimedia broadcast/multicast service gateway (104, 404), MBMS GW, and on a local side: a local application server (205, 406) connected to a local multimedia broadcast/multicast service, MBMS, functional entity (206, 407), the local MBMS functional entity being connected to the BMSC on the network side, the wireless network architecture including the MBMS functional entity, the local MBMS functional entity and the local application server, and the local MBMS functional entity, comprising the following steps: obtaining, by the local multimedia broadcast/multicast service, MBMS, functional entity on the local side, local MBMS bearer information from the MBMS functional entity on the core network side; receiving, by the local MBMS functional entity, application layer data from the local application server; determining, by the local MBMS functional entity based on the obtained local MBMS bearer information, local MBMS bearer information matching the application layer data; and sending, by the local MBMS functional entity, the application layer data based on the matched local MBMS bearer information; wherein wherein the determining, by the local MBMS functional entity, local MBMS bearer information matching the application layer data comprises: obtaining, by the local MBMS functional entity, a destination IP address of the application layer data; and if the local MBMS bearer information comprises the destination IP address of the application layer data, using the local MBMS bearer information comprising the destination IP address of the application layer data, as the matched local MBMS bearer information. obtaining, by the local multimedia broadcast/multicast service, MBMS, functional entity on the local side, local MBMS bearer information from the MBMS functional entity on the core network side; receiving, by the local MBMS functional entity, application layer data from the local application server; determining, by the local MBMS functional entity based on the obtained local MBMS bearer information, local MBMS bearer information matching the application layer data; and sending, by the local MBMS functional entity, the application layer data based on the matched local MBMS bearer information; wherein wherein the determining, by the local MBMS functional entity, local MBMS bearer information matching the application layer data comprises: obtaining, by the local MBMS functional entity, a destination IP address of the application layer data; and if the local MBMS bearer information comprises the destination IP address of the application layer data, using the local MBMS bearer information comprising the destination IP address of the application layer data, as the matched local MBMS bearer information. obtaining, by the local MBMS functional entity, a destination IP address of the application layer data; and if the local MBMS bearer information comprises the destination IP address of the application layer data, using the local MBMS bearer information comprising the destination IP address of the application layer data, as the matched local MBMS bearer information.