Method for determining bit size of rank indicator in wireless communication system, and device therefor
AssigneeLG Electronics Inc.
InventorHyungtae Kim
Life of this patent
Estimating the term…
Abstract
Disclosed in the present application is a method by which a terminal reports a rank indicator to a base station in a wireless access system. The rank indicator reporting method comprises the steps of: setting a plurality of channel status information—reference signal (CSI-RS) resources for one CSI process through an upper layer; selecting one from among the plurality of CSI-RS resources; and reporting, to the base station, an indicator indicating the selected one CSI-RS resource and the rank indicator, wherein a bit size of the rank indicator is determined on the basis of a maximum number of antenna ports for the plurality of CSI-RS resources.
Claims12
A method of reporting a rank indicator, which is reported to a base station by a user equipment, UE, in a wireless access system, comprising the steps of:
- receiving, from the base station, configuration information for a plurality of channel state information-reference signal, CSI-RS, resources for a single channel state information, CSI, process via a higher layer;
- selecting a single CSI-RS resource from the plurality of CSI-RS resources;
- determining an indicator corresponding to the selected single CSI-RS resource from a set of indicator values supported for the single channel CSI process;
- and
- reporting the determined indicator and a rank indicator in same reporting instance to the base station, wherein a bit size of the rank indicator is determined based on a maximum number of layers the UE is capable of supporting and a number of antenna ports corresponding to the determined indicator.
A user equipment, UE, in a wireless access system, comprising:
- a transmitter and a receiver;
- and
- a processor operatively connected to the transmitter and the receiver, wherein the processor configured to:
- receive, from a base station, configuration information for plurality of channel state information-reference signal, CSI-RS, resources for a single channel state information, CSI, process via a higher layer,
- determine an indicator corresponding to select a single CSI-RS resource from among the plurality of CSI-RS resources for a channel status information, CSI, process,
- select a single CSI-RS resource from the plurality of CSI-RS resources,
- report the determined indicator and a rank indicator in a same reporting instance to the base station.
- wherein a bit size of the rank indicator is determined based on a maximum number of layers the UE is capable of supporting and a number of antenna ports corresponding to the determined indicator.
Dependencies are inferred from the claim text.