Method and apparatus for generating reference signal sequence and for performing data scrambling in wireless communication system
The present disclosure pertains to a method and an apparatus for generating a reference signal (RS) sequence and a data scrambling sequence. A method for a base station transmitting a reference signal according to an embodiment of the present disclosure may comprise the steps of: generating a reference signal sequence; and transmitting a reference signal corresponding to the generated reference signal sequence. The reference signal sequence can be generated using an initial sequence that is determined using a slot number in a transmission frame, a symbol number in a slot, and a scrambling identifier (ID).
1. A method of transmitting a reference signal by a base station in a wireless communication system, the method comprising:
determining an initial sequence;
generating a reference signal sequence using the initial sequence; and
transmitting a channel state information reference signal (CSI-RS) corresponding to the generated reference signal sequence,
wherein the initial sequence is determined using Equation 1:
c init =(2 10 ×(((14( n s,f μ mod{ N slot frame,μ /M }))+ l+ 1)(2 N ID CSI +1)+ N ID CSI ))mod2 31 [Equation 1]
where, c init is the initial sequence, μ is a subcarrier spacing (SCS) configuration, N slot frame,μ is a number of slots in a transmission frame for the SCS configuration, n s,f μ is a slot number in the transmission frame for the SCS configuration, l is a symbol number in a slot, N ID CSI is a reference signal identifier (ID) of the CSI-RS, and M is a variable for determining a sequence initialization repetition periodicity of the initial sequence,
wherein the reference signal identifier is a scrambling identifier (ID), and
wherein the variable for determining the sequence initialization repetition periodicity of the initial sequence is set based on both the SCS configuration and a usage of the CSI-RS.
2. The method of claim 1 , further comprising transmitting information indicating a method used to determine the initial sequence.
3. A base station configured to transmit a reference signal in a wireless communication system, comprising:
a transceiver; and
a processor configured to control the transceiver,
wherein the processor is configured to:
determine an initial sequence,
generate a reference signal sequence using the initial sequence, and
transmit a channel state information reference signal (CSI-RS) corresponding to the generated reference signal sequence,
wherein the initial sequence is determined using Equation 1:
c init =(2 10 ×(((14( n s,f μ mod{ N slot frame,μ /M }))+ l+ 1)(2 N ID CSI +1)+ N ID CSI ))mod2 31 [Equation 1]
where, c init is the initial sequence, μ is a subcarrier spacing (SCS) configuration, N slot frame,μ is a number of slots in a transmission frame for the SCS configuration, n s,f μ is a slot number in the transmission frame for the SCS configuration, l is a symbol number in a slot, N ID CSI is a reference signal identifier (ID) of the CSI-RS, and M is a variable for determining a sequence initialization repetition periodicity of the initial sequence,
wherein the reference signal identifier is a scrambling identifier (ID), and
wherein the variable for determining the sequence initialization repetition periodicity of the initial sequence is set based on both the SCS configuration and a usage of the CSI-RS.
4. The base station of claim 3 ,
wherein the processor is further configured to transmit information indicating a method used to determine the initial sequence through the transceiver.
5. A method of receiving a reference signal by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a channel state information reference signal (CSI-RS) corresponding to a reference signal sequence,
wherein the reference signal sequence is generated using an initial sequence,
wherein the initial sequence is determined using Equation 1:
c init =(2 10 ×(((14( n s,f μ mod{ N slot frame,μ /M }))+ l+ 1)(2 N ID CSI +1)+ N ID CSI ))mod2 31 [Equation 1]
where, c init is the initial sequence, μ is a subcarrier spacing (SCS) configuration, N slot frame,μ is a number of slots in a transmission frame for the SCS configuration, n s,f μ is a slot number in the transmission frame for the SCS configuration, l is a symbol number in a slot, N ID CSI is a reference signal identifier (ID) of the CSI-RS, and M is a variable for determining a sequence initialization repetition periodicity of the initial sequence,
wherein the reference signal identifier is a scrambling identifier (ID), and
wherein the variable for determining the sequence initialization repetition periodicity of the initial sequence is set based on both the SCS configuration parameter and a usage of the CSI-RS.
6. A UE configured to receive a reference signal in a wireless communication system, comprising:
a transceiver; and
a processor configured to control the transceiver to receive a channel state information reference signal (CSI-RS) corresponding to a reference signal sequence,
wherein the reference signal sequence is generated using an initial sequence,
wherein the initial sequence is determined using Equation 1:
c init =(2 10 ×(((14( n s,f μ mod{ N slot frame,μ /M }))+ l+ 1)(2 N ID CSI +1)+ N ID CSI ))mod2 31 [Equation 1]
where, c init is the initial sequence, μ is a subcarrier spacing (SCS) configuration, N slot frame,μ is a number of slots in a transmission frame for the SCS configuration n s,f μ is a slot number in the transmission frame for the SCS configuration, l is a symbol number in a slot, N ID CSI is a reference signal identifier (ID) of the CSI-RS, and M is a variable for determining a sequence initialization repetition periodicity of the initial sequence,
wherein the reference signal identifier is a scrambling identifier (ID), and
wherein the variable for determining the sequence initialization repetition periodicity of the initial sequence is set based on both the SCS configuration parameter and a usage of the CSI-RS.