A method for data transmission, comprising: when a base station supports multiple radio access technologies, determining, by a radio equipment, RE, in a base station, the radio access technologies supported respectively by two ports of the RE; and transmitting, by the RE, data corresponding to the radio access technologies respectively by using the two ports; characterized in that the determination of the radio access technologies supported respectively by the two ports of the RE comprises: receiving, by the RE, Layer 1 information sent by a first radio equipment controller, REC, in the base station, wherein the Layer 1 information comprises a slot ID of the first REC; receiving, by the RE, a HDLC link setup message broadcasted by the first REC, wherein the HDLC link setup message comprises the slot ID of the first REC and indication information about a first group of radio access technology, wherein the first group of radio access technology is the radio access technology supported by the first REC; determining, by the RE, according to the slot ID of the first REC, that a first port receiving the Layer 1 information sent by the first REC supports the first group of radio access technology; receiving, by the RE, Layer 1 information sent by a second REC in the base station, the Layer 1 information comprising the slot ID of the second REC; receiving, by the RE, a HDLC link setup message broadcasted by the second REC, wherein the HDLC link setup message comprises the slot ID of the second REC and indication information about a second group of radio access technology, wherein the second group of radio access technology is the radio access technology supported by the second REC; and determining, by the RE, according to the slot ID of the second REC, that a second port receiving the Layer 1 information sent from the second REC, supports the second group of radio access technology. when a base station supports multiple radio access technologies, determining, by a radio equipment, RE, in a base station, the radio access technologies supported respectively by two ports of the RE; and transmitting, by the RE, data corresponding to the radio access technologies respectively by using the two ports; characterized in that the determination of the radio access technologies supported respectively by the two ports of the RE comprises: receiving, by the RE, Layer 1 information sent by a first radio equipment controller, REC, in the base station, wherein the Layer 1 information comprises a slot ID of the first REC; receiving, by the RE, a HDLC link setup message broadcasted by the first REC, wherein the HDLC link setup message comprises the slot ID of the first REC and indication information about a first group of radio access technology, wherein the first group of radio access technology is the radio access technology supported by the first REC; determining, by the RE, according to the slot ID of the first REC, that a first port receiving the Layer 1 information sent by the first REC supports the first group of radio access technology; receiving, by the RE, Layer 1 information sent by a second REC in the base station, the Layer 1 information comprising the slot ID of the second REC; receiving, by the RE, a HDLC link setup message broadcasted by the second REC, wherein the HDLC link setup message comprises the slot ID of the second REC and indication information about a second group of radio access technology, wherein the second group of radio access technology is the radio access technology supported by the second REC; and determining, by the RE, according to the slot ID of the second REC, that a second port receiving the Layer 1 information sent from the second REC, supports the second group of radio access technology. receiving, by the RE, Layer 1 information sent by a first radio equipment controller, REC, in the base station, wherein the Layer 1 information comprises a slot ID of the first REC; receiving, by the RE, a HDLC link setup message broadcasted by the first REC, wherein the HDLC link setup message comprises the slot ID of the first REC and indication information about a first group of radio access technology, wherein the first group of radio access technology is the radio access technology supported by the first REC; determining, by the RE, according to the slot ID of the first REC, that a first port receiving the Layer 1 information sent by the first REC supports the first group of radio access technology; receiving, by the RE, Layer 1 information sent by a second REC in the base station, the Layer 1 information comprising the slot ID of the second REC; receiving, by the RE, a HDLC link setup message broadcasted by the second REC, wherein the HDLC link setup message comprises the slot ID of the second REC and indication information about a second group of radio access technology, wherein the second group of radio access technology is the radio access technology supported by the second REC; and determining, by the RE, according to the slot ID of the second REC, that a second port receiving the Layer 1 information sent from the second REC, supports the second group of radio access technology.