# US 2019/0245668 A1 · Apparatus and method for transmitting muting information, and apparatus and method for acquiring channel state using same

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- Number: US 2019/0245668 A1
- Document ID: US20190245668A1
- Status: Published application
- Kind: A1
- Application number: 16/387,174
- Filed: 2019-04-17
- Published: 2019-08-08
- Earliest claimed: 2010-08-11
- Assignees: Goldpeak Innovations Inc
- Applicants: Goldpeak Innovations Inc
- Inventors: Sungjun YOON; Kyoungmin PARK; Sungjin SUH
- Web page: https://patentgrep.com/patent/US20190245668A1

## CPC

- H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal}
- H04L 1/1614: {using bitmaps}
- H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT}
- H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)}
- H04L 5/0073: {Allocation arrangements that take into account other cell interferences}
- H04L 5/0098: {Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands}
- H04W 72/0446: Resources in time domain, e.g. slots or frames
- H04W 74/0816: with collision avoidance
- H04B 7/0413: MIMO systems
- H04W 52/42: in systems with time, space, frequency or polarisation diversity
- H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M)
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- H04B: TRANSMISSION

## Abstract

The present disclosure relates to an apparatus and a method for transmitting muting information in a wireless communication system, and to an apparatus and a method for acquiring channel state using same. In an exemplary embodiment, muting information includes: a first data field, having a serving cell for receiving from peripheral cells in a multi-cell environment, at least one of a CSI-RS pattern, the number of CSI-RS antenna ports, a CSI-RS duty cycle, and CSI-RS transmission subframe offset information, and using same for expressing the cycle and the offset of muting subframes, which pertain to information on a resource block that can generate interference between the peripheral cells and CSI-RS; and a second data field for to expressing a specific muting pattern, which must be muted within the muting subframes, having either 12 bits or 28 bits that display muting application in a bitmap format.

## Claims

### Claim 1

A base station to transmit Channel State Information-Reference Signal (CSI-RS) information, comprising:
a processor configured to generate CSI-RS information including an offset of zero power transmission subframes and a CSI-RS zero power configuration list having an n-bit bitmap, wherein each bit of the n-bit bitmap indicating whether to apply zero power transmission in the zero power transmission subframes; and
a transmitter configured to transmit the CSI-RS information to a user equipment.

### Claim 2

A method of transmitting Channel State Information-Reference Signal (CSI-RS) information, the method comprising:
generating CSI-RS information including an offset of zero power transmission subframes and a CSI-RS zero power configuration list having an n-bit bitmap, wherein each bit of the n-bit bitmap indicating whether to apply zero power transmission in the zero power transmission subframes; and
transmitting the CSI-RS information to a user equipment.