Carrier scheduling method, device and system for carrier aggregation

A carrier scheduling method for carrier aggregation (CA), applied to user equipment (UE), comprising:

• within a transmission time interval (TTI), detecting a preset downlink control information (DCI) format from a received anchor carrier component;
• when a preset mark is detected in the preset DCI format, acquiring a physical downlink control channel (PDSCH) corresponding to the preset DCI format on the anchor carrier component;
• and
• detecting a plurality of PDCCHs of received remaining carrier components other than the anchor carrier component, acquiring remaining DCI formats other than the preset DCI format, and performing decoding according to the remaining DCI formats to acquire a plurality of PDSCHs corresponding to the remaining DCI formats.

A network side device, comprising:

• a processor;
• and
• a memory for storing instructions executable by the processor,
• wherein the processor is configured to:
• within a transmission time interval (TTI), when a number of times of overlapping between a plurality of search spaces of a plurality of pieces of user equipment (UE) to be scheduled satisfies a preset determination condition, select a UE-specific downlink control information (DCI) format from a plurality of DCI formats;
• mark the selected UE-specific DCI format, and set scheduling of a physical downlink shared channel (PDSCH) corresponding to the UE-specific DCI format onto an anchor carrier component, and
• set a plurality of physical downlink control channels (PDCCHs) corresponding to remaining DCI formats other than the UE-specific DCI format onto a plurality of carrier components for scheduling PDSCHs corresponding to the remaining DCI formats;
• and
• send the set anchor carrier component and the plurality of carrier components set corresponding to the remaining DCI formats to the pieces of UE to be scheduled.

A user equipment (UE), comprising:

• a processor;
• and
• a memory for storing instructions executable by the processor,
• wherein the processor is configured to:
• within the current transmission time interval (TTI), detect a preset DCI format from a received anchor carrier component;
• and
• when a preset mark is detected in the preset DCI format, acquire a PDSCH corresponding to the preset DCI format on the anchor carrier component;
• wherein a plurality of PDCCHs of received remaining carrier components other than the anchor carrier component is received, remaining DCI formats other than the preset DCI format are acquired, and decoding is performed according to the remaining DCI formats to acquire a plurality of PDSCHs corresponding to the remaining DCI formats.