In 5^th generation (5G) mobile communication systems, it is needed to support cross-carrier scheduling with different subcarrier spacings, that is, a scheduling carrier and a scheduled carrier may have different subcarrier spacings. When subcarrier spacings are different, blind detection capabilities corresponding to the terminal are different. A base station needs to configure search spaces having different sizes for different scheduling carriers according to a system scheduling situation and blind detection capabilities of the terminal. Currently, there is no specific method for how to configure search spaces having different sizes for different scheduling carriers.

Embodiments of the present disclosure provide a method of determining a search space of a carrier, a terminal and a network device. Flexible search space configuration is realized without introducing additional signaling overhead.

To solve the above technical problem, the following technical schemes are provided in embodiments of the present disclosure.

A method of determining a search space of a carrier is applied to a terminal and includes: in a case that cross-carrier scheduling is configured, determining, according to a search space of a scheduling carrier configured by a network device and a scaling factor, a search space of a carrier other than the scheduling carrier.

The scaling factor is determined based on blind detection capabilities of the terminal on different subcarriers, and/or a proportional relationship between subcarrier spacings of the scheduling carrier and a scheduled carrier.

The scaling factor K is

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