Method and apparatus for transmitting and receiving signal in communication network
A method and an apparatus for transmitting and receiving a signal in a communication network are disclosed. A method for operating UE supporting an unlicensed band comprises the steps of: receiving from a base station DMTC-related information including DMTC cycle and DMTC offset; checking DMTC section to which DRS is transmitted based on the DMTC-related information; and receiving from the base station the DRS using sub-frames apart from a sub-frame corresponding to the DRS cycle within the DMTC section. As a result, the performance of a communication network can be improved.
1. An operation method of a user equipment (UE) supporting an unlicensed band, the operation method comprising:
receiving, from a base station, discovery signal measurement timing configuration (DMTC) related information including a DMTC period and a DMTC offset;
identifying a DMTC duration, in which a discovery reference signal (DRS) including a cell-specific reference signal (CRS), a primary synchronization signal (PSS), and a secondary synchronization signal (SSS) is transmitted, based on the DMTC related information;
detecting the PSS and the SSS included in the DRS which is transmitted from the base station;
calculating a bit sequence of the CRS based on a slot number which is determined based on a subframe in which the SSS is detected; and
measuring the CRS included in the DRS using the bit sequence,
wherein a radio frame includes subframes #0 to 9, the bit sequence is calculated using the slot number which belongs to the subframe #0 when the SSS is detected in one subframe among the subframes #1 to 4, and the bit sequence is calculated using the slot number which belongs to the subframe #5 when the SSS is detected in one subframe among the subframes #6 to 9.
2. The operation method of claim 1 , wherein the DRS further includes a channel state information-reference signal (CSI-RS).
3. The operation method of claim 1 , wherein the CRS corresponds to antenna port 0.
4. The operation method of claim 1 , wherein the PSS is configured in the subframe #0 or 5.
5. The operation method of claim 1 , wherein, when the SSS is configured in at least one of the subframes #1 to 4, the SSS uses a sequence for an existing SSS to be configured in the subframe #0.
6. The operation method of claim 1 , wherein, when the SSS is configured in at least one of the subframes #6 to 9, the SSS uses a sequence for an existing SSS to be configured in the subframe #5.
7. An operation method of a base station in a communication network, the operation method comprising:
transmitting configuration information indicating a discovery signal measurement timing configuration (DMTC) duration;
generating a primary synchronization signal (PSS) and a secondary synchronization signal (SSS);
calculating a bit sequence of a cell-specific reference signal (CRS) based on a slot number which is determined based on a subframe to be used for transmitting the SSS;
generating the CRS using the bit sequence; and
transmitting a discovery reference signal (DRS) including the PSS, the SSS, and the CRS in the DMTC duration of an unlicensed band,
wherein a radio frame includes subframes #0 to 9, the bit sequence is calculated using the slot number which belongs to the subframe #0 when the SSS is transmitted in one subframe among the subframes #1 to 4, and the bit sequence is calculated using the slot number which belongs to the subframe #5 when the SSS is transmitted in one subframe among the subframes #6 to 9.
8. The operation method of claim 7 , wherein the DRS further includes a channel state information-reference signal (CSI-RS).
9. The operation method of claim 7 , wherein the CRS corresponds to antenna port 0.
10. The operation method of claim 7 wherein the PSS is configured in the subframe #0 or 5.
11. The operation method of claim 7 , wherein, when the SSS is configured in at least one of the subframes #1 to 4, the SSS uses a sequence for an existing SSS to be configured in the subframe #0.
12. The operation method of claim 7 , wherein, when the SSS is configured in at least one of the subframes #6 to 9, the SSS uses a sequence for an existing SSS to be configured in the subframe #5.