FIG. 3 is a schematic module diagram of a terminal according to some embodiments of this disclosure;

FIG. 4 is a structural block diagram of a terminal according to some embodiments of this disclosure;

FIG. 5 is a schematic module diagram of a network device according to some embodiments of this disclosure; and

FIG. 6 is a structural block diagram of a network device according to some embodiments of this disclosure.

To make the objectives, technical solutions, and advantages of this disclosure clearer, the following describes this disclosure in detail with reference to the drawings and specific embodiments.

Before description of some embodiments of this disclosure, some concepts used in the following description are explained first.

In a 5G NR system, a cell supports a maximum system bandwidth of up to 400 MHz, much higher than a maximum system bandwidth of 20 MHz in LTE, to support higher system and user throughput. However, supporting such a high system bandwidth is a huge challenge for implementation of UE, and is not conducive to implementation of low-cost UE. Therefore, the 5G NR system further supports dynamic and flexible bandwidth allocation. A system bandwidth is divided into a plurality of bandwidth parts (bandwidth part, BWP) to support access of narrowband terminal users or energy-saving-mode terminal users.