Switching method, base station and terminal

A switching method, comprising:

• receiving, by a terminal, a switching message for a narrow-bandwidth receiving mode, the switching message configured by a base station and comprising time when the terminal is indicated to enter the narrow-bandwidth receiving mode and a position of a narrow bandwidth on a frequency band when the narrow-bandwidth receiving mode is entered;
• receiving a duration of narrow-band signal detection of the terminal in the narrow-bandwidth receiving mode and an interval period of the narrow-band signal detection, which are pre-configured by the base station, and turning off a receiver in the interval period;
• switching to the narrow bandwidth specified in the switching message for information reception, the narrow bandwidth being smaller than a system bandwidth;
• and
• receiving Downlink Control Information (DCI) for the terminal in a Physical Downlink Control Channel (PDCCH) on the narrow bandwidth,
• wherein the DCI is located in a User Equipment (UE)-specific search space corresponding to the terminal and is at a Control Channel Element (CCE) aggregation level corresponding to the terminal.

A base station, comprising:

• a processor, a memory, a transceiver and a bus, the processor, the memory and the transceiver being connectable through the bus,
• wherein the transceiver is configured to send and receive a signal and communicate with a terminal, the memory is configured to store a set of program codes, and
• the processor is configured to call the program codes stored in the memory to execute the following operations:
• configuring a switching message for a narrow-bandwidth receiving mode, the switching message comprising time when a terminal is indicated to enter a narrow-bandwidth receiving mode and a position of a narrow bandwidth on a frequency band when the narrow-bandwidth receiving mode is entered;
• pre-configuring a duration of narrow-band signal detection of the terminal in the narrow-bandwidth receiving mode and an interval period of the narrow-band signal detection;
• sending, through the transceiver, the duration of the narrow-band signal detection and the interval period of the narrow-band signal detection to the terminal;
• sending, through the transceiver, the switching message to the terminal to indicate the terminal to switch to the narrow bandwidth specified in the switching message for information reception, the narrow bandwidth being smaller than a system bandwidth;
• and
• sending, through the transceiver, Downlink Control Information (DCI) for the terminal in a Physical Downlink Control Channel (PDCCH) on the narrow bandwidth;
• wherein the DCI is located in a User Equipment (UE)-specific search space corresponding to the terminal and is at a Control Channel Element (CCE) aggregation level corresponding to the terminal.

A terminal, comprising:

• a processor, a memory, a transmitter, a receiver and a bus, the processor, the memory, the transmitter and the receiver being connected through the bus,
• wherein the transmitter is configured to transmit a signal, the receiver is configured to receive the signal, the transmitter and the receiver are independently arranged respectively or integrated, the memory is configured to store a set of program codes, and
• the processor is configured to call the program codes stored in the memory to execute the following operations:
• receiving, through the receiver, a switching message, configured by a base station, in a narrow-bandwidth receiving mode, the switching message comprising time when the terminal is indicated to enter the narrow-bandwidth receiving mode and a position of a narrow bandwidth on a frequency band when the narrow-bandwidth receiving mode is entered;
• receiving, through the receiver, a duration of narrow-band signal detection of the terminal in the narrow-bandwidth receiving mode and an interval period of the narrow-band signal detection, which are pre-configured by the base station, and turning off the receiver in the interval period;
• executing switching to the narrow bandwidth specified in the switching message for information reception, the narrow bandwidth being smaller than a system bandwidth;
• and
• receiving, through the receiver, Downlink Control Information (DCI) for the terminal in a Physical Downlink Control Channel (PDCCH) on the narrow bandwidth;
• wherein the DCI is located in a User Equipment (UE)-specific search space corresponding to the terminal and is at a Control Channel Clement (CCE) aggregation level corresponding to the terminal.