Method and terminal for detecting discovery signal
A disclosure of the present specification provides a method for detecting a discovery signal. The method is a method for detecting discovery signals from a plurality of transmission points (TP) using the same physical cell identifier (PCID) and may comprise the steps of: determining scrambling identifiers of the discovery signals for the plurality of transmission points on the basis of the PCID which is commonly used by the plurality of transmission points and resource elements (REs) of the discovery signals transmitted from the plurality of transmission points; and demodulating the discovery signals on respective positions of the resource elements using the determined scrambling identifiers to detect the discovery signals.
1. A method for receiving a discovery signal from each of multiple transmission points (TPs) in a wireless communication system, the method performed by a user equipment (UE) and comprising:
determining whether the multiple TPs have a same physical cell identifier (PCID);
applying a scrambling identifier for each of the multiple TPs when the multiple TPs have the same PCID; and
detecting the discovery signal on a resource element based on the scrambling identifier,
wherein the scrambling identifier is implicitly indicated by the same PCID and a configuration for the resource element, and
wherein if the UE is instructed not to perform measurement using the discovery signal, the UE determines that the multiple TPs have the same PCID, and if the UE is instructed to perform measurement using the discovery signal, the UE determines that the multiple TPs have different PCIDs.
2. The method of claim 1 , wherein the discovery signal is a signal based on one or more of a cell-specific reference signal (CRS), a channel-state information reference signal (CSI-RS), a primary synchronization signal (PSS), and a secondary synchronization signal (SSS).
3. The method of claim 2 , wherein if the discovery signal is the signal based on the CSI-RS, the configuration is resourceConfig-r11 which is a CSI reference signal configuration constituting a CSI-RS-ConfigNZP information element (IE).
4. The method of claim 1 , wherein the scrambling identifier is scramblingIdentity-r11 constituting an SI-RS-ConfigNZP IE.
5. A user equipment (UE) for receiving a discovery signal from each of multiple transmission points (TPs) in a wireless communication system, the UE comprising: a radio frequency (RF) unit that transmits and receives a wireless signal; and
a processor operating in functional combination with the RF unit,
wherein the processor:
determines whether the multiple TPs have a same physical cell identifier (PCID),
applies a scrambling identifier for each of the multiple TPs when the multiple TPs have the same PCID, and
detects the discovery signal on a resource element based on the determined scrambling identifier,
wherein the scrambling identifier is implicitly indicated by the same PCID and a configuration for the resource element, and
wherein if the UE is instructed not to perform measurement using the discovery signal, the processor determines that the multiple TPs have the same PCID, and if the UE is instructed to perform measurement using the discovery signal, the processor determines that the multiple TPs have different PCIDs.
6. The UE of claim 5 , wherein the discovery signal is a signal based on one or more of a cell-specific reference signal (CRS), a channel-state information reference signal (CSI-RS), a primary synchronization signal (PSS), and a secondary synchronization signal (SSS).
7. The UE of claim 6 , wherein if the discovery signal is the signal based on the CSI-RS, the configuration is resourceConfig-r11 which is a CSI reference signal configuration constituting a CSI-RS-ConfigNZP information element (IE).
8. The UE of claim 5 , wherein the scrambling identifier is scramblingIdentity-r11 constituting an SI-RS-ConfigNZP IE.