Method and apparatus for transmitting and receiving reference signal for sidelink communication
AssigneesHyundai Motor Company, Kia Motors Corporation, Wonkwang University Center for Industry-Academy Cooperation
InventorsGene Back Hahn, In Yong Jung, Hyuk Min Son
Life of this patent
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Abstract
A method and an apparatus for transmitting and receiving reference signals for sidelink communication are provided. The operation method of a first terminal includes receiving a message including a first DMRS scrambling identifier for sidelink communication from a base station and calculating a first DMRS sequence based on the first DMRS scrambling identifier. Additionally, the method includes transmitting SCI and a first DMRS generated based on the first DMRS sequence to a second terminal.
Claims20
An operation method of a first terminal in a communication system, the operation method comprising:
- receiving a message including a first demodulation reference signal (DMRS) scrambling identifier NID for sidelink communication from a base station;
- calculating a first pseudo-random sequence cinit by inputting the first DMRS scrambling identifier NID into Equation 1;
- cinit=(217(Nsymbslotns,fμ+l+1)(2NID+1)+2NID) mod 231 (Equation 1)
- calculating a first DMRS sequence rl(m) by inputting the first pseudo-random sequence cinit into Equation 2;
- and
- r
- l
- (
- m
- )
- =
- 1
- 2
-
- (
- 1
- -
- 2
-
- c
-
- (
- 2
-
- m
- )
- )
- +
- j
-
- 1
- 2
-
- (
- 1
- -
- 2
-
- c
-
- (
- 2
-
- m
- +
- 1
- )
- )
- (
- Equation
-
- 2
- )
- transmitting sidelink control information (SCI) and a first DMRS generated based on the first DMRS sequence rl(m) to a second terminal through a physical sidelink control channel (PSCCH),
- wherein Nsymbslot denotes a number of symbols in a slot, ns,fμ denotes a slot number in a frame, and l denotes a symbol number in the slot.
An operation method of a second terminal in a communication system, the operation method comprising:
- receiving a message including a first demodulation reference signal (DMRS) scrambling identifier for sidelink communication from a base station;
- performing a monitoring operation on a physical sidelink control channel (PSCCH) to obtain sidelink control information (SCI) from the first terminal;
- comparing a sequence of a reference signal detected on the PSCCH with a first DMRS sequence rl(m) generated based on the first DMRS scrambling identifier;
- and
- in response to determining that the sequence of the reference signal is equal to the first DMRS sequence rl(m), performing a reception operation of the SCI on the PSCCH,
- wherein the DMRS sequence rl(m) is generated based on Equation 1;
- r
- l
- (
- m
- )
- =
- 1
- 2
-
- (
- 1
- -
- 2
-
- c
-
- (
- 2
-
- m
- )
- )
- +
- j
-
- 1
- 2
-
- (
- 1
- -
- 2
-
- c
-
- (
- 2
-
- m
- +
- 1
- )
- )
- (
- Equation
-
- 1
- )
- an initialization value cinit of c(·) in Equation 1 is generated based on Equation 2;
- and
- cinit=(217(Nsymbslotns,fμ+l+1)(2NID+1)+2NID) mod 231 (Equation 2)
- NID denotes the first DMRS scrambling identifier, Nsymbslot denotes a number of symbols in a slot, ns,fμ denotes a slot number in a frame, and l denotes a symbol number in the slot.
A first terminal in a communication system comprising:
- a processor;
- and
- a memory storing at least one instruction executable by the processor,
- wherein the at least one instruction causes the first terminal to:
- receive a message including a first demodulation reference signal (DMRS) scrambling identifier NID for sidelink communication from a base station;
- calculate a first pseudo-random sequence cinit by inputting the first DMRS scrambling identifier NID into Equation 1;
- cinit=(217(Nsymbslotns,fμ+l+1)(2NID+1)+2NID) mod 231 (Equation 1)
- calculate a first DMRS sequence rl(m) by inputting the first pseudo-random sequence cinit into Equation 2;
- and
- r
- l
- (
- m
- )
- =
- 1
- 2
-
- (
- 1
- -
- 2
-
- c
-
- (
- 2
-
- m
- )
- )
- +
- j
-
- 1
- 2
-
- (
- 1
- -
- 2
-
- c
-
- (
- 2
-
- m
- +
- 1
- )
- )
- (
- Equation
-
- 2
- )
- transmit sidelink control information (SCI) and a first DMRS generated based on the first DMRS sequence rl(m) to a second terminal through a physical sidelink control channel (PSCCH),
- wherein Nsymbslot denotes a number of symbols in a slot, ns,fμ denotes a slot number in a frame, and l denotes a symbol number in the slot.
Dependencies are inferred from the claim text.