A terminal, comprising: a transceiver module, configured to receive from a base station, a configuration parameter for a scheduling request, wherein the configuration parameter assigns a scheduling request resource for sending the scheduling request on at least one carrier serving the terminal; and a processing module, configured to: when the scheduling request is triggered, send, according to the configuration parameter received by the transceiver module, the scheduling request on one carrier of the at least one carrier by using the transceiver module; wherein the at least one carrier comprises at least one secondary carrier and a primary carrier; or the at least one carrier comprises at least one secondary carrier; characterized in that the configuration parameter comprises a positive integer n, wherein a threshold length of a first timer is n times a period of a scheduling request resource on a specific carrier of the at least one carrier; the first timer is used to perform, in a same scheduling request process, timing on a time length from a current time back to a time at which the terminal sent a scheduling request last time; or perform, in a same scheduling request process, timing on a time length from a current time to a time at which the terminal can send a scheduling request next time; the threshold length of the first timer is a minimum time interval from a time at which the terminal sends a scheduling request this time back to a time at which the terminal sent a scheduling request last time in a same scheduling request process; when the at least one carrier comprises a primary carrier, the specific carrier is the primary carrier or the specific carrier is a carrier, of the at least one carrier, on which the period of the scheduling request resource is minimum or the specific carrier is a carrier, of activated carriers of the at least one carrier, on which the period of the scheduling request resource is minimum; and the processing module is further configured to: after sending the scheduling request on one carrier of the at least one carrier according to the received configuration parameter by using the transceiver module, determine a threshold length of the first timer according to n and start the first timer according to the determined threshold length of the first timer. a transceiver module, configured to receive from a base station, a configuration parameter for a scheduling request, wherein the configuration parameter assigns a scheduling request resource for sending the scheduling request on at least one carrier serving the terminal; and a processing module, configured to: when the scheduling request is triggered, send, according to the configuration parameter received by the transceiver module, the scheduling request on one carrier of the at least one carrier by using the transceiver module; wherein the at least one carrier comprises at least one secondary carrier and a primary carrier; or the at least one carrier comprises at least one secondary carrier; characterized in that the configuration parameter comprises a positive integer n, wherein a threshold length of a first timer is n times a period of a scheduling request resource on a specific carrier of the at least one carrier; the first timer is used to perform, in a same scheduling request process, timing on a time length from a current time back to a time at which the terminal sent a scheduling request last time; or perform, in a same scheduling request process, timing on a time length from a current time to a time at which the terminal can send a scheduling request next time; the threshold length of the first timer is a minimum time interval from a time at which the terminal sends a scheduling request this time back to a time at which the terminal sent a scheduling request last time in a same scheduling request process; when the at least one carrier comprises a primary carrier, the specific carrier is the primary carrier or the specific carrier is a carrier, of the at least one carrier, on which the period of the scheduling request resource is minimum or the specific carrier is a carrier, of activated carriers of the at least one carrier, on which the period of the scheduling request resource is minimum; and the processing module is further configured to: after sending the scheduling request on one carrier of the at least one carrier according to the received configuration parameter by using the transceiver module, determine a threshold length of the first timer according to n and start the first timer according to the determined threshold length of the first timer.