A transmission method for realizing coexistence of data and voice services, comprising: acquiring an idle timeslot available when voice transmission is performed by using digital enhanced cordless telecommunications, DECT; and performing wireless fidelity, Wi-Fi, transmission in the idle timeslot available when voice transmission is performed by using DECT, wherein the acquiring an idle timeslot available when voice transmission is performed by using DECT specifically comprises: acquiring an idle timeslot segment available when voice transmission is performed by using DECT, wherein the idle timeslot segment is continuous idle timeslots available when voice transmission is performed by using DECT; wherein the performing Wi-Fi transmission in the idle timeslot available when voice transmission is performed by using DECT specifically comprises: limiting a minimum rate of Wi-Fi transmission in each idle timeslot segment according to a duration of each idle timeslot segment available when voice transmission is performed by using DECT and a size of a Wi-Fi data packet that needs to be transmitted in a corresponding idle timeslot segment; and using a transmission rate that is greater than or equal to the minimum rate of Wi-Fi transmission in the idle timeslot segment to perform Wi-Fi transmission in the corresponding idle timeslot segment. acquiring an idle timeslot available when voice transmission is performed by using digital enhanced cordless telecommunications, DECT; and performing wireless fidelity, Wi-Fi, transmission in the idle timeslot available when voice transmission is performed by using DECT, wherein the acquiring an idle timeslot available when voice transmission is performed by using DECT specifically comprises: acquiring an idle timeslot segment available when voice transmission is performed by using DECT, wherein the idle timeslot segment is continuous idle timeslots available when voice transmission is performed by using DECT; wherein the performing Wi-Fi transmission in the idle timeslot available when voice transmission is performed by using DECT specifically comprises: limiting a minimum rate of Wi-Fi transmission in each idle timeslot segment according to a duration of each idle timeslot segment available when voice transmission is performed by using DECT and a size of a Wi-Fi data packet that needs to be transmitted in a corresponding idle timeslot segment; and using a transmission rate that is greater than or equal to the minimum rate of Wi-Fi transmission in the idle timeslot segment to perform Wi-Fi transmission in the corresponding idle timeslot segment. acquiring an idle timeslot segment available when voice transmission is performed by using DECT, wherein the idle timeslot segment is continuous idle timeslots available when voice transmission is performed by using DECT; wherein the performing Wi-Fi transmission in the idle timeslot available when voice transmission is performed by using DECT specifically comprises: limiting a minimum rate of Wi-Fi transmission in each idle timeslot segment according to a duration of each idle timeslot segment available when voice transmission is performed by using DECT and a size of a Wi-Fi data packet that needs to be transmitted in a corresponding idle timeslot segment; and using a transmission rate that is greater than or equal to the minimum rate of Wi-Fi transmission in the idle timeslot segment to perform Wi-Fi transmission in the corresponding idle timeslot segment. limiting a minimum rate of Wi-Fi transmission in each idle timeslot segment according to a duration of each idle timeslot segment available when voice transmission is performed by using DECT and a size of a Wi-Fi data packet that needs to be transmitted in a corresponding idle timeslot segment; and using a transmission rate that is greater than or equal to the minimum rate of Wi-Fi transmission in the idle timeslot segment to perform Wi-Fi transmission in the corresponding idle timeslot segment.