Data transmitting method and apparatus
The present disclosure provides a data transmitting method. The method includes that a device detects SA, generates a DMRS sequence and a scrambling code of a data channel for the SA correctly decoded; and performs processing for the data channel scheduled by the SA correctly decoded according to the DMRS sequence and the scrambling code. According to the method of the present disclosure, DMRS sequence randomization and scrambling code randomization of the data channel can be better supported, so as to optimize transmission performance.
1. A method for transmitting data in a wireless communication system, the method comprising:
identifying scheduling assignment information for transmitting the data;
identifying cyclic redundancy check (CRC) information based on the scheduling assignment information;
transmitting the scheduling assignment information and the CRC information on a physical sidelink control channel (PSCCH) to a terminal in a first subframe; and
transmitting the data and a demodulation reference signal (DMRS) for the data on a physical sidelink shared channel (PSSCH) to the terminal in the first subframe,
wherein the scheduling assignment information includes resource information for the data and modulation and coding scheme information for the data,
wherein the CRC information being 16 bits is determined based on all information fields in the scheduling assignment information, and
wherein the data, a parameter f SS for a root sequence of the DMRS, an orthogonal cover code (OCC) for the DMRS, and a cyclic shift (CS) for the DMRS are identified based on the CRC information, in case that the scheduling assignment information, the data and the DMRS are transmitted in the same subframe.
2. The method of claim 1 , wherein the parameter f SS for the root sequence of the DMRS is determined based on:
f ss =└X/16┘ mod 30, where X is the CRC information.
3. The method of claim 1 , wherein the OCC for the DMRS is determined based on a value X mod 2, where X is the CRC information.
4. The method of claim 1 , wherein the CS for the DMRS is determined based on a value └X/2┘ mod 8, where X is the CRC information.
5. The method of claim 1 , wherein a scrambling code for the data is based on the CRC information.
6. A first terminal for transmitting data in a wireless communication system, the first terminal comprising:
a transceiver; and
a controller coupled to the transceiver and configured to:
identify scheduling assignment information for transmitting the data,
identify cyclic redundancy check (CRC) information based on the scheduling assignment information,
transmit the scheduling assignment information and the CRC information on a physical sidelink control channel (PSCCH) to a second terminal in a first subframe, and
transmit the data and a demodulation reference signal (DMRS) for the data on a physical sidelink shared channel (PSSCH) to the second terminal in the first subframe,
wherein the scheduling assignment information includes resource information for the data and modulation and coding scheme information for the data,
wherein the CRC information being 16 bits is determined based on all information fields in the scheduling assignment information, and
wherein the data, a parameter f SS for a root sequence of the DMRS, an orthogonal cover code (OCC) for the DMRS, and a cyclic shift (CS) for the DMRS are identified based on the CRC information, in case that the scheduling assignment information, the data and the DMRS are transmitted in the same subframe.
7. The first terminal of claim 6 ,
wherein the parameter f SS for the root sequence of the DMRS is determined based on:
f ss =└X/16┘ mod 30, where X is the CRC information.
8. The first terminal of claim 6 ,
wherein the OCC for the DMRS is determined based on a value X mod 2, where X is the CRC information.
9. The first terminal of claim 6 ,
wherein the CS for the DMRS is determined based on a value └X/2┘ mod 8, where X is the CRC information.
10. The first terminal of claim 6 ,
wherein a scrambling code for the data is based on the CRC information.
11. A method for receiving data in a wireless communication system, the method comprising:
receiving scheduling assignment information and cyclic redundancy check (CRC) information on a physical sidelink control channel (PSCCH) from a terminal in a first subframe;
identifying a demodulation reference signal (DMRS) sequence based on the CRC information; and
receiving the data and a DMRS for the data on a physical sidelink shared channel (PSSCH) from the terminal according to the scheduling assignment information and the DMRS sequence in the first subframe,
wherein the scheduling assignment information includes resource information for the data and modulation and coding scheme information for the data,
wherein the CRC information being 16 bits depends on all information fields in the scheduling assignment information, and
wherein a parameter f SS for a root sequence of the DMRS sequence, an orthogonal cover code (OCC) for the DMRS sequence, and a cyclic shift (CS) for the DMRS sequence are identified based on the CRC information, in case that the scheduling assignment information, the data and the DMRS are received in the same subframe.
12. The method of claim 11 ,
wherein the parameter f SS for root sequence of the DMRS is determined based on:
f ss =└X/16┘ mod 30, where X is the CRC information.
13. The method of claim 11 ,
wherein the OCC for the DMRS sequence is determined based on a value X mod 2, where X is the CRC information.
14. The method of claim 11 ,
wherein the CS for the DMRS sequence is determined based on a value └X/2┘ mod 8, where X is the CRC information.
15. The method of claim 11 ,
wherein a scrambling code for the data is based on the CRC information.
16. A second terminal for receiving data in a wireless communication system, the second terminal comprising:
a transceiver; and
a controller coupled to the transceiver and configured to:
receive scheduling assignment information and cyclic redundancy check (CRC) information on a physical sidelink control channel (PSCCH) from a first terminal in a first subframe,
identifying a demodulation reference signal (DMRS) sequence based on the CRC information, and
receive the data and a DMRS for the data on a physical sidelink shared channel (PSSCH) from the first terminal according to the scheduling assignment information and the DMRS sequence in the first subframe,
wherein the scheduling assignment information includes resource information for the data and modulation and coding scheme information for the data,
wherein the CRC information being 16 bits depends on all information fields in the scheduling assignment information, and
wherein a parameter f SS for a root sequence of the DMRS sequence, an orthogonal cover code (OCC) for the DMRS sequence, and a cyclic shift (CS) for the DMRS sequence are identified based on the CRC information, in case that the scheduling assignment information, the data and the DMRS is received in the same subframe.
17. The second terminal of claim 16 ,
wherein the parameter f SS for root sequence of the DMRS is determined based on:
f ss =└X/16┘ mod 30, where X is the CRC information.
18. The second terminal of claim 16 ,
wherein the OCC for the DMRS sequence is determined based on a value X mod 2, where X is the CRC information.
19. The second terminal of claim 16 ,
wherein the CS for the DMRS sequence is determined based on a value └X/2┘ mod 8, where X is the CRC information.
20. The second terminal of claim 16 ,
wherein a scrambling code for the data is based on the CRC information.