US 2020/0076667 A1 · METHOD AND USER EQUIPMENT FOR RECEIVING DOWNLINK SIGNALS, AND METHOD AND BASE STATION FOR TRANSMITTING DOWNLINK SIGNALS

Abstract

Provided are methods and devices for transmitting/receiving downlink signals in a Wireless communication system. Carrier information is provided to user equipment, the carrier information including cell identifier information which indicates Whether a first cell identifier related to a first carrier operating on one resource block (RB) and a second cell identifier used for a cell-specific reference signal (CRS) on the first carrier are the same or different. If the second cell identifier is the same as the first cell identifier, the user equipment assumes that the number of antenna ports for the CRS on the first carrier is the same as the number of antenna ports for a reference signal defined for NB-IoT (reference signal for NB-IoT, NRS). If the second cell identifier is different from the first cell identifier, the carrier information further includes antenna port number information, and the user equipment assumes that the number of the antenna ports for the CRS is the same as the number of antenna ports based on the antenna port number information.

Claims18

Dependent claims

A user equipment for receiving a downlink signal in a narrowband in a wireless communication system, the user equipment comprising,

at least one transceiver;
at least one processor;
and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
acquiring a first cell identifier through a first carrier;
receiving, via the at least one transceiver, carrier information for a second carrier;
and
receiving, via the at least one transceiver, downlink data on the second carrier based on the carrier information and a narrowband reference signal (NB-RS), and
wherein each of the first and second carriers operates in one resource block (RB),
wherein the first carrier is a carrier on which a narrowband synchronization signal (nSS) and a narrowband physical broadcast channel (nPBCH) are present and the second carrier is a carrier on which the nSS and the nPBCH are not present, and
wherein the NB-RS are received based on the first cell identifier.

8 more elements

A device for a user equipment in a wireless communication system, the device comprising,

at least one processor;
and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
acquiring a first cell identifier through a first carrier;
receiving carrier information for a second carrier;
and
receiving downlink data on the second carrier based on the carrier information and a narrowband reference signal (NB-RS), and
wherein each of the first and second carriers operates in one resource block (RB),
wherein the first carrier is a carrier on which a narrowband synchronization signal (nSS) and a narrowband physical broadcast channel (nPBCH) are present and the second carrier is a carrier on which the nSS and the nPBCH are not present, and
wherein the NB-RS are received based on the first cell identifier.

7 more elements

A base station for transmitting a downlink signal in a narrowband in a wireless communication system, the base station comprising,

at least one transceiver;
at least one processor;
and
at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed by the at least one processor, perform operations comprising:
transmitting a first cell identifier through a first carrier;
transmitting, via the at least one transceiver, carrier information for a second carrier;
and
transmitting, via the at least one transceiver, downlink data on the second carrier based on the carrier information and a narrowband reference signal (NB-RS), and
wherein each of the first and second carriers operates in one resource block (RB),
wherein the first carrier is a carrier on which a narrowband synchronization signal (nSS) and a narrowband physical broadcast channel (nPBCH) are present and the second carrier is a carrier on which the nSS and the nPBCH are not present, and
wherein the NB-RS are received based on the first cell identifier.

8 more elements

Dependencies are inferred from the claim text.

Method and user equipment for receiving downlink signals, and method and base station for transmitting downlink signals

Life of this patent

Method and user equipment for receiving downlink signals, and method and base station for transmitting downlink signals

Life of this patent

Abstract

Claims18