Granted Patent B2

US 12,309,752 · App. 18/643,405 · Granted May 20, 2025

Inventor: Sung Jun Yoon (Seoul, KR)

Assignee: Innovative Technology Lab Co., Ltd.

H04W72/0446H04J13/0074H04L5/0012H04L5/005H04L5/0051H04L27/2613

Abstract

Claims (55)

1. A base station comprising:

one or more antennas;

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the base station to:

transmit at least one configuration for demodulation-reference signal (DM-RS); and

cause a wireless user device to communicate a first DM-RS, a second DM-RS, a third DM-RS, and a fourth DM-RS,

wherein the first DM-RS in a first symbol in a first time resource is based on a first group-hopping associated with the first time resource;

wherein the second DM-RS in a second symbol in the first time resource is based on a second group-hopping associated with the first time resource and with an offset, and wherein the first group-hopping and the second group-hopping are configured to apply different inputs in a pseudo-random sequence;

wherein the third DM-RS in a third symbol in a second time resource is based on a third group-hopping associated with the second time resource; and

wherein the fourth DM-RS in a fourth symbol in the second time resource is based on a fourth group-hopping associated with the second time resource and with an offset, and wherein the third group-hopping and the fourth group-hopping are configured to apply different inputs in the pseudo-random sequence.

2. The base station of claim 1 , wherein the first group-hopping and the third group-hopping are associated with (Σ i=0 7 c(16n ss PSSCH +i)·2 i )mod30, and

wherein the second group-hopping and the fourth group-hopping are associated with (Σ i=0 7 c(16n ss PSSCH +8+i)·2 i )mod30,

where c(x) denotes the pseudo-random sequence that is defined as a length—31 Gold sequence and n ss PSSCH denotes a current slot number in a subframe pool for sidelink, wherein the first time resource is a first slot of a subframe, and wherein the second time resource is a second slot of the subframe.

3. The base station of claim 2 , wherein n ss PSSCH =k for the first slot of the subframe and n ss PSSCH =k+1 for the second slot of the subframe, where k is a non-negative integer.

4. The base station of claim 1 , wherein the instructions, when executed by the one or more processors, cause the base station to:

cause the wireless user device to transmit, using first orthogonal sequence [+1+1 +1+1] or second orthogonal sequence [+1−1+1−1], the first DM-RS, the second DM-RS, the third DM-RS, and the fourth DM-RS.

5. The base station of claim 4 , wherein:

a modulo-2 operation of an identifier being equal to a first value is associated with the first orthogonal sequence [+1+1+1+1]; and

a modulo-2 operation of the identifier being equal to a second value is associated with the second orthogonal sequence [+1−1+1−1].

6. The base station of claim 1 , wherein the instructions, when executed by the one or more processors, cause the base station to:

cause the wireless user device to transmit one or more physical sidelink shared channel (PSSCH) signals,

wherein at least one of the first DM-RS, the second DM-RS, the third DM-RS, or the fourth DM-RS is associated with the one or more PSSCH signals.

7. The base station of claim 1 , wherein the instructions, when executed by the one or more processors, cause the base station to:

cause the wireless user device to enable a group-hopping for demodulation-reference signals (DM-RSs) associated with a physical sidelink shared channel (PSSCH).

8. The base station of claim 1 ,

wherein each of the first time resource and the second time resource consists of seven symbols, respectively,

wherein the first time resource precedes the second time resource in a time axis,

wherein the first symbol in the first time resource is symbol #2 and the second symbol in the first time resource is symbol #5, the seven symbols in the first time resource being arranged from symbol #0 to symbol #6, and

wherein the third symbol in the second time resource is symbol #1 and the fourth symbol in the second time resource is symbol #4, the seven symbols in the second time resource being arranged from symbol #0 to symbol #6.

9. A method performed by a base station, the method comprising:

transmitting at least one configuration for demodulation-reference signal (DM-RS); and

causing a wireless user device to communicate a first DM-RS, a second DM-RS, a third DM-RS, and a fourth DM-RS,

wherein the first DM-RS in a first symbol in a first time resource is based on a first group-hopping associated with the first time resource;

wherein the second DM-RS in a second symbol in the first time resource is based on a second group-hopping associated with the first time resource and with an offset, and wherein the first group-hopping and the second group-hopping are configured to apply different inputs in a pseudo-random sequence;

wherein the third DM-RS in a third symbol in a second time resource is based on a third group-hopping associated with the second time resource; and

wherein the fourth DM-RS in a fourth symbol in the second time resource is based on a fourth group-hopping associated with the second time resource and with an offset, and wherein the third group-hopping and the fourth group-hopping are configured to apply different inputs in the pseudo-random sequence.

10. The method of claim 9 , wherein the first group-hopping and the third group-hopping are associated with (Σ i=0 7 c(16n ss PSSCH +i)·2 i )mod 30, and

wherein the second group-hopping and the fourth group-hopping are associated with (Σ i=0 7 c(16n ss PSSCH +8+i)·2 i )mod30,

where c(x) denotes the pseudo-random sequence that is defined as a length—31 Gold sequence and n ss PSSCH denotes a current slot number in a subframe pool for sidelink, wherein the first time resource is a first slot of a subframe, and wherein the second time resource is a second slot of the subframe.

11. The method of claim 10 , wherein n ss PSSCH =k for the first slot of the subframe and n ss PSSCH =k+1 for the second slot of the subframe, where k is a non-negative integer.

12. The method of claim 9 , wherein the causing of the wireless user device to communicate the first DM-RS, the second DM-RS, the third DM-RS, and the fourth DM-RS comprises:

causing the wireless user device to transmit, using first orthogonal sequence [+1 +1+1+1] or second orthogonal sequence [+1−1+1−1], the first DM-RS, the second DM-RS, the third DM-RS, and the fourth DM-RS.

13. The method of claim 12 , wherein:

a modulo-2 operation of an identifier being equal to a first value is associated with the first orthogonal sequence [+1+1+1+1]; and

a modulo-2 operation of the identifier being equal to a second value is associated with the second orthogonal sequence [+1−1+1−1].

14. The method of claim 9 , further comprising:

causing the wireless user device to transmit one or more physical sidelink shared channel (PSSCH) signals,

wherein at least one of the first DM-RS, the second DM-RS, the third DM-RS, or the fourth DM-RS is associated with the one or more PSSCH signals.

15. The method of claim 9 , further comprising:

causing the wireless user device to enable a group-hopping for demodulation-reference signals (DM-RSs) associated with a physical sidelink shared channel (PSSCH).

16. The method of claim 9 ,

wherein each of the first time resource and the second time resource consists of seven symbols, respectively,

wherein the first time resource precedes the second time resource in a time axis,

wherein the first symbol in the first time resource is symbol #2 and the second symbol in the first time resource is symbol #5, the seven symbols in the first time resource being arranged from symbol #0 to symbol #6, and

wherein the third symbol in the second time resource is symbol #1 and the fourth symbol in the second time resource is symbol #4, the seven symbols in the second time resource being arranged from symbol #0 to symbol #6.

Priority Claims (3)

Continuity (6)

References Cited (52)