Downlink control method and apparatus

A downlink control method, comprising:

• determining, by a terminal, at least one downlink control channel in a first downlink control channel and a second downlink control channel, wherein the determining comprises:
• determining the downlink control channel used in short transmission time intervals (TTIs) according to pre-definition;
• and
• receiving, by the terminal, downlink control information (DCI) by using the determined downlink control channel;
• performing, by the terminal, a corresponding traffic receiving way according to the detected DCI;
• wherein the pre-definition comprises a part of the short TTIs uses the second downlink control channel;
• wherein a part of the short TTIs uses the second downlink control channel comprises except that a first short TTI do not use the second downlink control channel, and remaining short TTIs use the second downlink control channel;
• wherein the first downlink control channel is a physical downlink control channel (PDCCH), and the second downlink control channel is a short physical downlink control channel (SPDCCH);
• each of the short TTIs is a TTI a time domain length of that is smaller than 1 millisecond;
• and the SPDCCH is a physical downlink control channel that occupies a part of resource elements within the time domain length of one of the short TTIs, and a time domain length of the SPDCCH is smaller than or equal to the time domain length of an occupied short TTI;
• wherein the traffic receiving way comprises at least one of:
• in response to determining that the DCI of the terminal is located in the PDCCH, receiving a traffic at the first short TTI or receiving a traffic at a TTI with the time domain length of 1 millisecond.

A downlink control apparatus, that is disposed on a base station and comprises a processor, a storage device and a transmitter, wherein the storage device stores processor-executable programs, and the programs comprise a first determining module;

• wherein the first determining module is configured to determine at least one downlink control channel in a first downlink control channel and a second downlink control channel, comprising:
• determining the downlink control channel used in short transmission time intervals (TTIs) according to pre-definition;
• and
• the transmitter is configured to transmit downlink control information (DCI) by using the determined downlink control channel;
• wherein the pre-definition comprises a part of the short TTIs uses the second downlink control channel;
• wherein a part of the short TTIs uses the second downlink control channel comprises except that a first short TTI do not use the second downlink control channel, and remaining short TTIs use the second downlink control channel;
• wherein the first downlink control channel is a physical downlink control channel (PDCCH), and the second downlink control channel is a short physical downlink control channel (SPDCCH);
• each of the short TTIs is a TTI a time domain length of that is smaller than 1 millisecond;
• and the SPDCCH is a physical downlink control channel that occupies a part of resource elements within the time domain length of one of the short TTIs, and a time domain length of the SPDCCH is smaller than or equal to the time domain length of an occupied short TTI;
• wherein the DCI is used for notifying a terminal of a corresponding traffic receiving way, and the traffic receiving way comprises at least one of:
• in response to determining that the DCI of the terminal is located in the PDCCH, receiving a traffic at the first short TTI or receiving a traffic at a TTI with the time domain length of 1 millisecond.