In a possible design, the operation that the terminal acquires the reference information of the first parameter required to be indicated to the network-side device may include the following operation.

Responsive to detecting that no UL-SCH resource is obtained to transmit the cached data, the terminal acquires the reference information of the first parameter required to be indicated to the network-side device.

It can be seen that, in the design, the terminal specifically acquires the reference information of the first parameter required to be indicated to the network-side device responsive to detecting that no UL-SCH resource is obtained to transmit the cached data in a present TTI. In such a manner, the terminal may dynamically configure reference information of an alternative resource used to transmit the cached data, i.e., the reference information of the first parameter, in real time according to a transmission resource scheduling condition of the cached data and then transmit the SR to synchronously indicate the reference information of the first parameter to the network-side device to enable the network-side device to timely acquire the reference information of the alternative resource, so that the configuration information of the licensed resource transmitting the cached data may be accurately determined, and improvement in resource scheduling flexibility and real-time performance of the wireless communication system is facilitated.

In a possible design, the cached data may include at least one of: data cached in an RLC layer of the terminal and data cached in a PDCP layer of the terminal.