Communication method and apparatus

A communication method, comprising:

• sending sleep indication information to a terminal device, wherein the sleep indication information is used to instruct the terminal device to enter a sleep state;
• after sending the sleep indication information to the terminal device, and when the terminal device is in a sleep state during a sleep time period, receiving, by a network device, first information from the terminal device;
• and
• sending, to the terminal device, a first physical downlink control channel (PDCCH) corresponding to the first information.

A communication apparatus, comprising:

• a transceiver, configured to send first information to a network device within a sleep time period, wherein the first information is a scheduling request or a negative acknowledgment (NACK);
• and
• a processor, configured to:
• after the transceiver sends the first information, monitor a physical downlink control channel (PDCCH) within a first time period.

A communication apparatus, comprising:

• a transceiver, configured to send sleep indication information to a terminal device, wherein the sleep indication information is used to indicate to the terminal device to enter a sleep state;
• the transceiver is further configured to:
• after the transceiver sends the sleep indication information to the terminal device, and when the terminal device is in a sleep state during a sleep time period, receive first information from the terminal device;
• and
• the transceiver is further configured to send, to the terminal device, a first physical downlink control channel (PDCCH) corresponding to the first information.