METHOD AND DEVICE FOR SWITCHING FROM DOUBLE STREAMS TO SINGLE STREAM IN UPLINK MIMO MODE

摘要

Embodiments of the present invention provide a method for switching from a dual stream to a single stream in an uplink MIMO mode. The method includes: sending a scheduling command with a value of absolute grant being zero _ grant to a secondary data stream; and after a preset time since the scheduling command takes effect, sending a switching command that instructs a terminal to switch from an uplink MIMO dual stream to an uplink MIMO single stream. In the embodiments of the present invention, the scheduling command is sent first to control the communication terminal to stop sending new data in the secondary stream and only retransmit the data to be retransmitted; and then the switching command is sent a period of time later. In this way, when the communication terminal switches from the uplink MIMO dual stream to the uplink MIMO single stream, no data or only a relatively small amount of data exists in the secondary stream, which helps to reduce data loss, and meanwhile, to simplify the HARQ design for switching from an uplink MIMO dual stream to an uplink MIMO single stream.