A first mobile terminal (20, 20A), comprising: a receiving unit, configured to receive wireless backhaul data that is sent by a wireless access point or a micro base station; a determining unit, configured to determine at least one wireless backhaul channel for transmitting the wireless backhaul data received by the receiving unit, wherein the wireless backhaul channel comprises (a) a first access network device connected to a core network device, or (b) a first access network device connected to a core network device, and at least one of the following transit nodes: at least one second mobile terminal or at least one second access network device, wherein the determining unit is adapted to determine the at least one wireless backhaul channel according to a wireless network connection relationship of the first mobile terminal (20, 20A), wherein the wireless backhaul data is transmitted between the first mobile terminal (20, 20A) and the first access network device by using a radio link, the wireless backhaul data is transmitted between the first mobile terminal (20, 20A) and the second mobile terminal by using a radio link, the wireless backhaul data is transmitted between the second mobile terminals by using a radio link, the wireless backhaul data is transmitted between the second mobile terminal and the second access network device by using a radio link, and the wireless backhaul data is transmitted between the second access network devices by using a radio link; said first mobile terminal further comprising: a sending unit, configured to send the wireless backhaul data to the first access network device according to the wireless backhaul channel determined by the determining unit, wherein the first access network device sends the wireless backhaul data to the core network device connected to the first access network device. a receiving unit, configured to receive wireless backhaul data that is sent by a wireless access point or a micro base station; a determining unit, configured to determine at least one wireless backhaul channel for transmitting the wireless backhaul data received by the receiving unit, wherein the wireless backhaul channel comprises (a) a first access network device connected to a core network device, or (b) a first access network device connected to a core network device, and at least one of the following transit nodes: at least one second mobile terminal or at least one second access network device, wherein (a) a first access network device connected to a core network device, or (b) a first access network device connected to a core network device, and at least one of the following transit nodes: at least one second mobile terminal or at least one second access network device, wherein the determining unit is adapted to determine the at least one wireless backhaul channel according to a wireless network connection relationship of the first mobile terminal (20, 20A), wherein the wireless backhaul data is transmitted between the first mobile terminal (20, 20A) and the first access network device by using a radio link, the wireless backhaul data is transmitted between the first mobile terminal (20, 20A) and the second mobile terminal by using a radio link, the wireless backhaul data is transmitted between the second mobile terminals by using a radio link, the wireless backhaul data is transmitted between the second mobile terminal and the second access network device by using a radio link, and the wireless backhaul data is transmitted between the second access network devices by using a radio link; said first mobile terminal further comprising: a sending unit, configured to send the wireless backhaul data to the first access network device according to the wireless backhaul channel determined by the determining unit, wherein the first access network device sends the wireless backhaul data to the core network device connected to the first access network device.