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US 2016/0080948 A1Published application
Method and base station for transmitting downlink signal and method and equipment for receiving downlink signal
AssigneeLG Electronics Inc.
InventorsMoonil LEE, Jaehoon CHUNG, Hyunsoo KO, Seunghee HAN
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Abstract
A base station of the present invention configures resources in which a downlink signal is to be transmitted with zero power using resource sets defined for a specific number of antenna ports, regardless of the number of antenna ports actually configured in the base station, and transmits resource information indicating the configured resources to a user equipment. The user equipment of the present invention receives a downlink transmission from the base station, assuming that transmission power of resources corresponding to a resource set indicated by the resource information is zero.
Claims21
1-12. (canceled)
A method for transmitting, by a user equipment, channel state information, the method comprising:
- receiving, by the user equipment, zero power CSI-RS information indicating one or more zero power CSI-RS resources;
- and
- transmitting, by the user equipment, the channel state information using interference measurement based on the zero power CSI-RS information,
- wherein the user equipment presumes that no downlink data is mapped to the one or more zero power CSI-RS resources,
- wherein the zero power CSI-RS information includes a bitmap having bits corresponding respectively to CSI-RS resources defined for a fixed number of antenna ports, regardless of a number of antenna ports configured for transmission of a CSI-RS, among a plurality of CSI-RS resources defined according to numbers of antenna ports,
- wherein the fixed number is greater than two,
- wherein each of the plurality of CSI-RS resources is configured with one or more subcarriers by two consecutive OFDM symbols in a resource block according to the numbers of antenna ports, and
- wherein the two consecutive OFDM symbols are OFDM symbols 5 and 6, OFDM symbols 9 and 10, or OFDM symbols 12 and 13, among OFDM symbols 0 to 13 included in the resource block.
5 more elements
A user equipment for transmitting channel state information, the user equipment comprising:
- a transmitter;
- a receiver;
- and
- a processor configured to:
- control the transmitter and the receiver;
- control the receiver to receive zero power CSI-RS information indicating one or more zero power CSI-RS resources;
- calculate the channel state information using interference measurement based on the zero power CSI-RS information;
- control the transmitter to transmit the channel state information;
- and
- presume that no downlink data is mapped to the one or more zero power CSI-RS resources,
- wherein the zero power CSI-RS information includes a bitmap having bits corresponding respectively to CSI-RS resources defined for a fixed number of antenna ports, regardless of a number of antenna ports configured for transmission of a CSI-RS, among a plurality of CSI-RS resources defined according to numbers of antenna ports,
- wherein the fixed number is greater than two,
- wherein each of the plurality of CSI-RS resources is configured with one or more subcarriers by two consecutive OFDM symbols in a resource block according to the numbers of antenna ports, and
- wherein the two consecutive OFDM symbols are OFDM symbols 5 and 6, OFDM symbols 9 and 10, or OFDM symbols 12 and 13, among OFDM symbols 0 to 13 included in the resource block.
11 more elements
A method for receiving, by a base station, channel state information, the method comprising:
- transmitting, by the base station, zero power CSI-RS information indicating one or more zero power CSI-RS resources;
- and
- receiving, by the base station, the channel state information corresponding to interference measurement performed based on the zero power CSI-RS information,
- wherein the one or more zero power CSI-RS resources have no downlink data mapped to the one or more zero power CSI-RS resources,
- wherein the zero power CSI-RS information includes a bitmap having bits corresponding respectively to CSI-RS resources defined for a fixed number of antenna ports, regardless of a number of antenna ports configured for transmission of a CSI-RS, among a plurality of CSI-RS resources defined according to numbers of antenna ports,
- wherein the fixed number is greater than two,
- wherein each of the plurality of CSI-RS resources is configured with one or more subcarriers by two consecutive OFDM symbols in a resource block according to the numbers of antenna ports, and
- wherein the two consecutive OFDM symbols are OFDM symbols 5 and 6, OFDM symbols 9 and 10, or OFDM symbols 12 and 13, among OFDM symbols 0 to 13 included in the resource block.
5 more elements
A base station for receiving channel state information, the base station comprising:
- a transmitter,
- a receiver, and
- a processor configured to:
- control the transmitter and the receiver;
- control the transmitter to transmit zero power CSI-RS information indicating one or more zero power CSI-RS resources;
- and
- control the receiver to receive the channel state information corresponding to interference measurement performed based on the zero power CSI-RS information,
- wherein the one or more zero power CSI-RS resources have no downlink data mapped to the one or more zero power CSI-RS resources,
- wherein the zero power CSI-RS information includes a bitmap having bits corresponding respectively to CSI-RS resources defined for a fixed number of antenna ports, regardless of a number of antenna ports configured for transmission of a CSI-RS, among a plurality of CSI-RS resources defined according to numbers of antenna ports,
- wherein the fixed number is greater than two,
- wherein each of the plurality of CSI-RS resources is configured with one or more subcarriers by two consecutive OFDM symbols in a resource block according to the numbers of antenna ports, and
- wherein the two consecutive OFDM symbols are OFDM symbols 5 and 6, OFDM symbols 9 and 10, or OFDM symbols 12 and 13, among OFDM symbols 0 to 13 included in the resource block.
9 more elements
Dependencies are inferred from the claim text.