Method and apparatus to support channel refinement and multi-stream transmission in millimeter wave systems
AssigneeSamsung Electronics Co., Ltd.
InventorsKaushik Morapakkam Josiam, Richard Stirling-Gallacher, Zhouyue Pi
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Abstract
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.
Claims34
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.
A mobile station (MS) comprising:
- a transceiver;
- and
- processing circuitry configured to:
- receive, via the transceiver, a common channel state indicator-reference symbol (CSI-RS) from a base station (BS) over a millimeter wave radio frequency comprising a radio frequency of 30 giga hertz (GHz) to 300 GHz;
- send, via the transceiver, a request message to the BS over the millimeter wave radio frequency to request additional reference symbols;
- send, via the transceiver, a first feedback associated with the common CSI-RS to the BS over the millimeter wave radio frequency;
- receive, via the transceiver, a configuration message for an MS-specific CSI-RS from the BS over the millimeter wave radio frequency;
- receive, via the transceiver, the MS specific CSI-RS from the BS over the millimeter wave radio frequency;
- and
- send, via the transceiver, a second feedback associated with the MS specific CSI-RS to the BS over the millimeter wave radio frequency.
A base station (BS) comprising:
- a transceiver;
- and
- processing circuitry configured to:
- send, via the transceiver, a common channel state indicator-reference symbol (CSI-RS) to a mobile station (MS) over a millimeter wave radio frequency comprising a radio frequency of 30 giga hertz (GHz) to 300 GHz;
- receiving, via the transceiver, a request message from the MS over the millimeter wave radio frequency to request additional reference symbols;
- receive, via the transceiver, a first feedback associated with the common CSI-RS from the MS over the millimeter wave radio frequency;
- send, via the transceiver, a configuration message for an MS specific CSI-RS to the MS over the millimeter wave radio frequency;
- send, via the transceiver, the MS specific CSI-RS over the millimeter wave radio frequency;
- and
- receive, via the transceiver, a second feedback associated with the MS specific CSI-RS from the MS over the millimeter wave radio frequency.
A wireless communication system that includes a number of base station (BSs) configured to communicate with a number of mobile stations (MS), the wireless communications system comprising:
- at least one base station (BS) comprising:
- a plurality of antenna coupled to a transceiver;
- and
- processing circuitry configured to:
- send, via the transceiver, a common channel state indicator-reference symbol (CSI-RS) to a mobile station (MS) over a millimeter wave radio frequency comprising a radio frequency of 30 giga hertz (GHz) to 300 GHz;
- receive, via the transceiver, a request message over the millimeter wave radio frequency to request additional reference symbols;
- receive, via the transceiver, a first feedback associated with the common CSI-RS from the MS over the millimeter wave radio frequency;
- send, via the transceiver, a configuration message for an MS specific CSI-RS to the MS over the millimeter wave radio frequency;
- send, via the transceiver, the MS specific CSI-RS over the millimeter wave radio frequency;
- and
- receive, via the transceiver, a second feedback associated with the MS specific CSI-RS from the MS over the millimeter wave radio frequency.
Dependencies are inferred from the claim text.