Patent ID: 9479994
Filing Date: 2016-10-25
CPC Classification: H04B,H04L,H04W

Claim Text:
1. A retransmission method, comprising: controlling, by a network side device, a network side node to send a second space processing mode to a terminal after the network side node receives a negative acknowledgement fed back by the terminal, wherein the negative acknowledgement is used to indicate that the terminal fails in decoding downlink data sent by a first node, wherein the second space processing mode is used to indicate a space processing mode applied by a second node to the downlink data, and wherein the second space processing mode is different than a first space processing mode applied by the first node to the downlink data; and controlling, by the network side device, the second node to perform space processing for the downlink data using the second space processing mode, and then to retransmit the downlink data to the terminal; wherein a difference between the first space processing mode and the second space processing mode comprises the second node using a different number of antennas than the first node, a different number of antenna ports than the first node, or both when sending the downlink data to the terminal.