A method for configuring a transmission resource, comprising: notifying, by an access device, a user equipment of a second uplink-downlink configuration change period, wherein the second uplink-downlink configuration change period is less than a system message change period; and sending, by the access device, a first message to the user equipment, wherein the first message carries an uplink-downlink configuration indication corresponding to the second uplink-downlink configuration change period, so that the user equipment updates, according to the uplink-downlink configuration indication, an uplink-downlink configuration used by the user equipment; wherein: the notifying, by an access device, a user equipment of a second uplink-downlink configuration change period comprises: notifying, by the access device, the user equipment of the second uplink-downlink configuration change period by using a system broadcast message; or notifying, by the access device, the user equipment of the second uplink-downlink configuration change period by using dedicated radio resource control signaling; the second uplink-downlink configuration change period is 1/N of the system message change period, wherein N is a positive integer. notifying, by an access device, a user equipment of a second uplink-downlink configuration change period, wherein the second uplink-downlink configuration change period is less than a system message change period; and sending, by the access device, a first message to the user equipment, wherein the first message carries an uplink-downlink configuration indication corresponding to the second uplink-downlink configuration change period, so that the user equipment updates, according to the uplink-downlink configuration indication, an uplink-downlink configuration used by the user equipment; wherein: the notifying, by an access device, a user equipment of a second uplink-downlink configuration change period comprises: notifying, by the access device, the user equipment of the second uplink-downlink configuration change period by using a system broadcast message; or notifying, by the access device, the user equipment of the second uplink-downlink configuration change period by using dedicated radio resource control signaling; the second uplink-downlink configuration change period is 1/N of the system message change period, wherein N is a positive integer. the notifying, by an access device, a user equipment of a second uplink-downlink configuration change period comprises: notifying, by the access device, the user equipment of the second uplink-downlink configuration change period by using a system broadcast message; or notifying, by the access device, the user equipment of the second uplink-downlink configuration change period by using dedicated radio resource control signaling; the second uplink-downlink configuration change period is 1/N of the system message change period, wherein N is a positive integer. notifying, by the access device, the user equipment of the second uplink-downlink configuration change period by using a system broadcast message; or notifying, by the access device, the user equipment of the second uplink-downlink configuration change period by using dedicated radio resource control signaling; the second uplink-downlink configuration change period is 1/N of the system message change period, wherein N is a positive integer.