QUALCOMM Incorporated
PHYSICAL DOWNLINK CONTROL CHANNEL (PDCCH) ORDERED UPLINK CARRIER SWITCHING FOR HALF-DUPLEX FREQUENCY DIVISION DUPLEX (HD-FDD) USER EQUIPMENT

Abstract:

A scheduling entity receives, from a half-duplex frequency division duplex (HD-FDD) UE, an initial attach request on a first uplink carrier of a primary cell. It enters into an RRC connected state with the HD-FDD UE and determines an amount of data waiting for uplink in a buffer of the HD-FDD UE. It determines a target uplink carrier and a grant of time for the HD-FDD UE to upload the buffered data. It then transmits downlink control information (DCI) allocating the target uplink carrier for the determined time to the HD-FDD UE. The HD-FDD UE communicates with the scheduling entity via the first uplink carrier, receives the DCI, and switches from the first uplink carrier to the target uplink carrier. It then transmits, over the target uplink carrier, the buffered data to the scheduling entity for the determined time.