Method and apparatus to support channel refinement and multi-stream transmission in millimeter wave systems

摘要

Methods and apparatus for sending and receiving mobile station (MS) specific channel state indication reference symbols (CSI-RS) is provided. A common CSI-RS is sent from a base station (BS) and is received by an MS. First feedback is sent to the BS from the MS based on the common CSI-RS. A configuration of an MS-specific CSI-RS is sent from the BS and received by the MS. An MS specific CSI-RS is sent from the BS and is received by the MS. Second feedback is sent to the BS from the MS based on the MS specific CSI-RS.

主权项

1. A method for a mobile station (MS), the method comprising:
receiving, from a base station (BS), a common channel state indicator-reference symbol (CSI-RS) over a millimeter wave radio frequency comprising a radio frequency of 30 giga hertz (GHz) to 300 GHz; sending, to the BS, a request message over the millimeter wave radio frequency to request additional reference symbols; sending, to the BS, a first feedback associated with the common CSI-RS over the millimeter wave radio frequency; receiving, from the BS, a configuration message for an MS-specific CSI-RS over the millimeter wave radio frequency; receiving, from the BS, the MS specific CSI-RS over the millimeter wave radio frequency; and sending, to the BS, a second feedback associated with the MS specific CSI-RS over the millimeter wave radio frequency.