Switching method, terminal device, network device, and communication system

A switching method, comprising:

• sending, by a network device, switching information, wherein the switching information is used for instructing a terminal device to switch a channel monitoring mode,
• wherein the sending, by the network device, the switching information comprises:
• sending, by the network device, dynamic control signaling comprising the switching information to the terminal device;
• wherein the dynamic control signaling is downlink control information (DCI);
• wherein the switching information is used for instructing the terminal device to switch a monitoring mode for a search space of a physical downlink control channel (PDCCH);
• wherein the switching of different monitoring modes for the search space of the PDCCH is triggered by the terminal device receiving one or more bits in the dynamic control signaling;
• wherein the terminal device is configured with a first search space set group and a second search space set group;
• wherein the switching, by the terminal device, the monitoring mode for the search space of the PDCCH comprises switching between the first search space set group and the second search space set group;
• wherein the first search space set group comprises M search space sets, the second search space set group comprises N search space sets, and monitoring periods of the first search space set group and the second search space set group are individually configured, where M and N are positive integers larger than one;
• and
• wherein power consumption of the terminal device in a first state corresponding to the first search space set group is different from power consumption of the terminal device in a second state corresponding to the second search space set group.

A terminal device, comprising:

• a processor, a transceiver, and a memory, wherein the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory and control the transceiver, to perform a switching method, comprising:
• receiving switching information, wherein the switching information is used for instructing the terminal device to switch a channel monitoring mode;
• and
• switching, by the terminal device, the channel monitoring mode,
• wherein the receiving, by the terminal device, the switching information comprises:
• receiving, by the terminal device, the switching information in dynamic control signaling from a network device;
• wherein the dynamic control signaling is downlink control information (DCI);
• wherein the switching, by the terminal device, the channel monitoring mode comprises:
• switching, by the terminal device, a monitoring mode for a search space of a physical downlink control channel (PDCCH);
• wherein the switching of different monitoring modes for the search space of the PDCCH is triggered by the terminal device receiving one or more bits in the dynamic control signaling;
• wherein the terminal device is configured with a first search space set group and a second search space set group;
• wherein the switching, by the terminal device, the monitoring mode for the search space of the PDCCH comprises switching between the first search space set group and the second search space set group;
• wherein the first search space set group comprises M search space sets, the second search space set group comprises N search space sets, and monitoring periods of the first search space set group and the second search space set group are individually configured, where M and N are positive integers larger than one;
• and
• wherein power consumption of the terminal device in a first state corresponding to the first search space set group is different from power consumption of the terminal device in a second state corresponding to the second search space set group.

A network device, comprising:

• a processor, a transceiver, and a memory, wherein the memory is configured to store a computer program, and the processor is configured to call and run the computer program stored in the memory and control the transceiver, to perform a switching method, comprising:
• sending switching information, wherein the switching information is used for instructing a terminal device to switch a channel monitoring mode,
• wherein the sending, by the network device, the switching information comprises:
• sending, by the network device, dynamic control signaling comprising the switching information to the terminal device;
• wherein the dynamic control signaling is downlink control information (DCI);
• wherein the switching information is used for instructing the terminal device to switch a monitoring mode for a search space of a physical downlink control channel (PDCCH);
• wherein the switching of different monitoring modes for the search space of the PDCCH is triggered by the terminal device receiving one or more bits in the dynamic control signaling;
• wherein the terminal device is configured with a first search space set group and a second search space set group;
• wherein the switching, by the terminal device, the monitoring mode for the search space of the PDCCH comprises switching between the first search space set group and the second search space set group;
• wherein the first search space set group comprises M search space sets, the second search space set group comprises N search space sets, and monitoring periods of the first search space set group and the second search space set group are individually configured, where M and N are positive integers larger than one;
• and
• wherein power consumption of the terminal device in a first state corresponding to the first search space set group is different from power consumption of the terminal device in a second state corresponding to the second search space set group.