Transmission apparatus and method of status indication and communication system

A transmission apparatus of status indication, configured in a user equipment (UE), the transmission apparatus of status indication comprising:

• a memory that stores a plurality of instructions;
• and
• processor circuitry that couples to the memory and that is configured to execute the plurality of instructions to:
• monitor a physical downlink control channel (PDCCH) after the UE transmits uplink data;
• and
• receive PDCCH information transmitted by a base station via the PDCCH, the PDCCH information being used to indicate that the UE is permitted to enter into a discontinuous reception (DRX) status.

A communication system, comprising:

• a base station comprising a transmission apparatus of status indication, the transmission apparatus of status indication comprising:
• a first memory that stores a plurality of first instructions;
• and
• first processor circuitry that couples to the first memory and is configured to execute the plurality of first instructions to:
• determine whether a radio link control (RLC) layer has successfully received all RLC protocol data units (PDUs) of uplink data when the base station receives the uplink data transmitted by a user equipment (UE);
• and
• transmit physical downlink control channel (PDCCH) information to the UE, in a case where the RLC layer has successfully received all the RLC PDUs of the uplink data;
• wherein, the PDCCH information is used to indicate that the UE is permitted to enter into a discontinuous reception (DRX) status, and
• a UE transmission apparatus of status indication comprising:
• a second memory that stores a plurality of second instructions;
• and
• second processor circuitry that couples to the second memory and is configured to execute the plurality of instructions to:
• monitor a PDCCH after the UE transmits uplink data;
• and
• receive PDCCH information transmitted by a base station via the PDCCH, the PDCCH information being used to indicate that the UE is permitted to enter into a DRX status.