Each part of the embodiments of the disclosure may be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple operations or methods may be implemented by software or firmware stored in a memory and executed by a proper instruction execution system. For example, in case of implementation with the hardware, like another embodiment, any one or combination of the following technologies well-known in the art may be adopted for implementation: a discrete logic circuit with a logic gate circuit configured to realize a logic function for a data signal, an application-specific integrated circuit with a proper combined logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA) and the like.

Those of ordinary skill in the art should understand that all or part of the operations in the methods of the above-mentioned embodiments may be completed through related hardware instructed by a program, the program may be stored in a computer-readable storage medium, and when the program is executed, one or combination of the operations of the method embodiments is included.

In addition, each functional unit in each embodiment of the disclosure may be integrated into a processing module, or each unit may physically exist independently, or two or more than two units may be integrated into a module. The integrated module may be implemented in a hardware form or may also be implemented in form of software functional module. When being implemented in form of software functional module and sold or used as an independent product, the integrated module may be stored in a computer-readable storage medium.

The abovementioned storage medium may be a ROM, a magnetic disk, an optical disk or the like.