Patent ID: 8396070

Claim:
A method of controlling a scheduling scheme, the method performed by a user equipment (UE) and comprising: receiving first scheduling information including a first resource assignment and a first new data indicator (NDI) on a physical downlink control channel (PDCCH) from a base station (BS); if the first scheduling information masked with a persistent Cell Radio Network Temporary Identifier (C-RNTI) associated with a semi-persistent scheduling (SPS) includes the first NDI indicating a first value, activating the SPS for a downlink data packet to be delivered to the UE with the first resource assignment; receiving second scheduling information including a second resource assignment on the PDCCH from the BS, the second scheduling information being masked with the persistent C-RNTI associated with the SPS; and if the second scheduling information includes a second NDI indicating a second value, using the second scheduling information for a retransmission downlink data packet with the second resource assignment.