Method and device for performing beam refinement in wireless communication system
AssigneeLG Electronics Inc.
InventorsKilbom Lee, Kijun Kim, Suckchel Yang
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Abstract
A method for a terminal performing beam refinement in an mmWave communication system can be provided according to an embodiment of the present description. A method for a terminal performing beam refinement can comprise the steps of: transmitting a RACH preamble to a base station; receiving a RACH response from the base station; transmitting an RRC connection request message to the base station; and receiving a response message to the RRC connection request message. If beam inconsistency occurs in the terminal, ID information of a pre-connected terminal can be comprised in a terminal ID field of the RRC connection request message.
Claims10
A method for performing beam refinement by a User Equipment (UE) in an mmWave communication system, the method comprising:
- transmitting, to a base station (BS), a Random Access CHannel (RACH) preamble;
- receiving, from the BS, an RACH response;
- transmitting, to the BS, an RRC connection request message including at least one of a Channel State Information-Reference Signal (CSI-RS) request field and Channel State Information (CSI);
- and
- receiving, from the BS, a response message in response to the RRC connection request message based on a detection of a beam mismatch,
- wherein, when the beam mismatch is detected, ID information of the UE is included in a UE ID field of the RRC connection request message,
- wherein, based on the CSI-RS request field set to a first value, information on a CSI-RS is received through at least one of Downlink Control Information (DCI) and Medium Access Control-Control Element (MAC-CE),
- wherein at least one of a CSI-RS process reuse field, a CSI-RS resource allocation field, and a CSI-RS process selection field is received together with the information on the CSI-RS, and
- wherein, based on the CSI-RS process reuse field set to a first value, scheduling information on CSI-RS process configuration is received together with the information on the CSI-RS.
A user equipment (UE) for performing beam refinement in an mmWave communication system, the UE comprising:
- a receiver for receiving a signal;
- a transmitter for transmitting;
- and
- a processor configured to control the receiver and the transmitter,
- wherein the processor is further configured to:
- transmit, to a base station (BS), a Random Access CHannel (RACH) preamble;
- receive, from the BS, an RACH response;
- transmit, to the BS, an RRC connection request message including at least one of a Channel State Information-Reference Signal (CSI-RS) request field and Channel State Information (CSI);
- and
- receive, from the BS, a response message in response to the RRC connection request message based on a detection of a beam mismatch,
- wherein, when the beam mismatch is detected, ID information of the UE is included in a UE ID field of the RRC connection request message,
- wherein, based on the CSI-RS request field set to a first value, information on a CSI-RS is received through at least one of Downlink Control Information (DCI) and Medium Access Control-Control Element (MAC-CE),
- wherein at least one of a CSI-RS process reuse field, a CSI-RS resource allocation field, and a CSI-RS process selection field is received together with the information on the CSI-RS, and
- wherein, based on the CSI-RS process reuse field set to a first value, scheduling information on CSI-RS process configuration is received together with the information on the CSI-RS.
Dependencies are inferred from the claim text.