In order to avoid unknown behavior of a user equipment, the present
invention provides a method of improving Hybrid Automatic Repeat Request,
known as HARQ, operation for a network in a wireless communications
system. The method includes adding a HARQ information information
element, abbreviated to IE, and a Multi-Input Multi-Output, known as
MIMO, parameters IE into a radio resource control message, wherein the
radio resource control message is used by the network to assign, replace
or release a physical channel used by the user equipment, and
transmitting the radio resource control message to the user equipment.