According to the embodiments of the disclosure, functional units of the terminal and the network-side device may be divided according to the abovementioned method examples. For example, each functional unit may be divided correspondingly to each function and two or more than two functions may also be integrated into a processing unit. The integrated unit may be implemented in a hardware form and may also be implemented in form of software program module. It is to be noted that division of the units in the embodiment of the disclosure is schematic and only logical function division and another division manner may be adopted during practical implementation.

Under the condition that an integrated unit is adopted, FIG. 6 is a possible functional unit composition block diagram of a terminal involved in the abovementioned embodiments. The terminal 600 includes a processing unit 602 and a communication unit 603. The processing unit 602 is configured to control and manage an operation of the terminal. For example, the processing unit 602 is configured to support the terminal to execute 201-203 in FIG. 2, and/or is configured for another process of a technology described in the disclosure. The communication unit 603 is configured to support communication between the terminal and another device, for example, communication with the network-side device shown in FIG. 5. The terminal may further include a storage unit 601, configured to store a program code and data of the terminal.