Method and apparatus for transmitting information related to a reference signal
The present disclosure relates to a communication method and system for converging a 5 th -Generation (5G) communication system for supporting higher data rates beyond a 4 th -Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. The method for transmitting/receiving signals in a mobile communication system according to an embodiment of the present invention includes: receiving control information; obtaining information related to the orthogonal cover code (OCC) length, based on the received control information; and receiving a reference signal, based on the information related to the OCC length. In a mobile communication system according to embodiments of the present invention, the base station transmits information related to a reference signal to a terminal, and the terminal receives the reference signal based on the received information, thereby improving the performance of channel estimation.
1. A method for transmitting and receiving a signal by a terminal in a mobile communication system, the method comprising:
receiving configuration information of a demodulation reference signal (DMRS) on higher layer signaling;
receiving control information including DMRS information;
identifying information of an orthogonal cover code (OCC) length, a number of layers, and an antenna port associated with the DMRS based on the DMRS information; and
receiving the DMRS based on the control information,
wherein a length of the DMRS information is based on the configuration information of the DMRS.
2. The method of claim 1 , wherein the OCC length is identified as one of 2 or 4 when the length of the DMRS information is 4 bits.
3. The method of claim 1 , wherein a scrambling identity is further indicated by the DMRS information when the DMRS information indicates using up to 2 layers and the length of the DMRS information is 4 bits.
4. The method of claim 1 ,
wherein the DMRS information is identified based on the following table,
One Codeword:
Two Codewords:
Codeword 0 enabled,
Codeword 0 enabled,
Codeword 1 disabled
Codeword 1 enabled
Value
Value
of DMRS
Message
of DMRS
Message
information
(indicated information)
information
(indicated information)
0
1 layer, port 7, n SCID = 0, (OCC = 2)
0
2 layers, ports 7-8, n SCID = 0, (OCC = 2)
1
1 layer, port 7, n SCID = 1, (OCC = 2)
1
2 layers, ports 7-8, n SCID = 1, (OCC = 2)
2
1 layer, port 8, n SCID = 0, (OCC = 2)
2
2 layers, ports 7-8, n SCID = 0, (OCC = 4)
3
1 layer, port 8, n SCID = 1, (OCC = 2)
3
2 layers, ports 7-8, n SCID = 1, (OCC = 4)
4
1 layer, port 7, n SCID = 0, (OCC = 4)
4
2 layers, ports 11/13, n SCID = 0, (OCC = 4)
5
1 layer, port 7, n SCID = 1, (OCC = 4)
5
2 layers, ports 11/13, n SCID = 1, (OCC = 4)
6
1 layer, port 8, n SCID = 0, (OCC = 4)
6
3 layers, ports 7-9
7
1 layer, port 8, n SCID = 1, (OCC = 4)
7
4 layers, ports 7-10
8
1 layer, port 11, n SCID = 0, (OCC = 4)
8
5 layers, ports 7-11
9
1 layer, port 11, n SCID = 1, (OCC = 4)
9
6 layers, ports 7-12
10
1 layer, port 13, n SCID = 0, (OCC = 4)
10
7 layers, ports 7-13
11
1 layer, port 13, n SCID = 1, (OCC = 4)
11
8 layers, ports 7-14
12
2 layers, ports 7-8
12
Reserved
13
3 layers, ports 7-9
13
Reserved
14
4 layers, ports 7-10
14
Reserved
15
Reserved
15
Reserved
and
wherein n SCID is a scrambling identity.
5. A method transmitting and receiving a signal by a base station in a mobile communication system, the method comprising:
transmitting configuration information of a demodulation reference signal (DMRS) on higher layer signaling;
transmitting control information including DMRS information; and
transmitting the DMRS based on the control information,
wherein information of an orthogonal cover code (OCC) length, a number of layers, and an antenna port associated with the DMRS are identified based on the DMRS information, and
wherein a length of the DMRS information is based on the configuration information of the DMRS.
6. The method of claim 5 , wherein the OCC length is identified as one of 2 or 4 when the length of the DMRS information is 4 bits.
7. A terminal in a mobile communication system, the terminal comprising:
a transceiver for transmitting and receiving a signal; and
a controller coupled with the transceiver and configured to:
receive configuration information of a demodulation reference signal (DMRS) on higher layer signaling,
receive control information including DMRS information,
identify information of an orthogonal cover code (OCC) length, a number of layers, antenna port associated with the DMRS based on the DMRS information, and
receive the DMRS based on the control information,
wherein a length of the DMRS information is based on the configuration information of the DMRS.
8. The terminal of claim 7 , wherein the OCC length is identified as one of 2 or 4 if the length of the DMRS information is 4 bits.
9. The terminal of claim 7 , wherein a scrambling identity is further indicated by the DMRS information if the DMRS information indicates using up to 2 layers and the length of the DMRS information is 4 bits.
10. The terminal of claim 8 ,
wherein the DMRS information is identified based on the following table,
One Codeword:
Two Codewords:
Codeword 0 enabled,
Codeword 0 enabled,
Codeword 1 disabled
Codeword 1 enabled
Value
Value
of DMRS
Message
of DMRS
Message
information
(indicated information)
information
(indicated information)
0
1 layer, port 7, n SCID = 0, (OCC = 2)
0
2 layers, ports 7-8, n SCID = 0, (OCC = 2)
1
1 layer, port 7, n SCID = 1, (OCC = 2)
1
2 layers, ports 7-8, n SCID = 1, (OCC = 2)
2
1 layer, port 8, n SCID = 0, (OCC = 2)
2
2 layers, ports 7-8, n SCID = 0, (OCC = 4)
3
1 layer, port 8, n SCID = 1, (OCC = 2)
3
2 layers, ports 7-8, n SCID = 1, (OCC = 4)
4
1 layer, port 7, n SCID = 0, (OCC = 4)
4
2 layers, ports 11/13, n SCID = 0, (OCC = 4)
5
1 layer, port 7, n SCID = 1, (OCC = 4)
5
2 layers, ports 11/13, n SCID = 1, (OCC = 4)
6
1 layer, port 8, n SCID = 0, (OCC = 4)
6
3 layers, ports 7-9
7
1 layer, port 8, n SCID = 1, (OCC = 4)
7
4 layers, ports 7-10
8
1 layer, port 11, n SCID = 0, (OCC = 4)
8
5 layers, ports 7-11
9
1 layer, port 11, n SCID = 1, (OCC = 4)
9
6 layers, ports 7-12
10
1 layer, port 13, n SCID = 0, (OCC = 4)
10
7 layers, ports 7-13
11
1 layer, port 13, n SCID = 1, (OCC = 4)
11
8 layers, ports 7-14
12
2 layers, ports 7-8
12
Reserved
13
3 layers, ports 7-9
13
Reserved
14
4 layers, ports 7-10
14
Reserved
15
Reserved
15
Reserved
and
wherein n SCID is a scrambling identity.
11. A base station in a mobile communication system, the base station comprising:
a transceiver for transmitting and receiving a signal; and
a controller coupled with the transceiver and configured to:
transmit configuration information of a demodulation reference signal (DMRS) on higher layer signaling;
transmit control information including DMRS information, and
transmit the DMRS based on the control information,
wherein information of an orthogonal cover code (OCC) length, a number of layers, and an antenna port associated with the DMRS are identified based on the DMRS information, and
wherein a length of the DMRS information is based on the configuration information of the DMRS.
12. The base station of claim 11 , wherein the OCC length is identified as one of 2 or 4 if the length of the DMRS information is 4 bits.
13. The base station of claim 11 ,
wherein the DMRS information is identified based on the following table,
One Codeword:
Two Codewords:
Codeword 0 enabled,
Codeword 0 enabled,
Codeword 1 disabled
Codeword 1 enabled
Value
Value
of DMRS
Message
of DMRS
Message
information
(indicated information)
information
(indicated information)
0
1 layer, port 7, n SCID = 0, (OCC = 2)
0
2 layers, ports 7-8, n SCID = 0, (OCC = 2)
1
1 layer, port 7, n SCID = 1, (OCC = 2)
1
2 layers, ports 7-8, n SCID = 1, (OCC = 2)
2
1 layer, port 8, n SCID = 0, (OCC = 2)
2
2 layers, ports 7-8, n SCID = 0, (OCC = 4)
3
1 layer, port 8, n SCID = 1, (OCC = 2)
3
2 layers, ports 7-8, n SCID = 1, (OCC = 4)
4
1 layer, port 7, n SCID = 0, (OCC = 4)
4
2 layers, ports 11/13, n SCID = 0, (OCC = 4)
5
1 layer, port 7, n SCID = 1, (OCC = 4)
5
2 layers, ports 11/13, n SCID = 1, (OCC = 4)
6
1 layer, port 8, n SCID = 0, (OCC = 4)
6
3 layers, ports 7-9
7
1 layer, port 8, n SCID = 1, (OCC = 4)
7
4 layers, ports 7-10
8
1 layer, port 11, n SCID = 0, (OCC = 4)
8
5 layers, ports 7-11
9
1 layer, port 11, n SCID = 1, (OCC = 4)
9
6 layers, ports 7-12
10
1 layer, port 13, n SCID = 0, (OCC = 4)
10
7 layers, ports 7-13
11
1 layer, port 13, n SCID = 1, (OCC = 4)
11
8 layers, ports 7-14
12
2 layers, ports 7-8
12
Reserved
13
3 layers, ports 7-9
13
Reserved
14
4 layers, ports 7-10
14
Reserved
15
Reserved
15
Reserved
and
wherein n SCID is a scrambling identity.
14. The method of claim 5 ,
wherein the DMRS information is identified based on the following table,
One Codeword:
Two Codewords:
Codeword 0 enabled,
Codeword 0 enabled,
Codeword 1 disabled
Codeword 1 enabled
Value
Value
of DMRS
Message
of DMRS
Message
information
(indicated information)
information
(indicated information)
0
1 layer, port 7, n SCID = 0, (OCC = 2)
0
2 layers, ports 7-8, n SCID = 0, (OCC = 2)
1
1 layer, port 7, n SCID = 1, (OCC = 2)
1
2 layers, ports 7-8, n SCID = 1, (OCC = 2)
2
1 layer, port 8, n SCID = 0, (OCC = 2)
2
2 layers, ports 7-8, n SCID = 0, (OCC = 4)
3
1 layer, port 8, n SCID = 1, (OCC = 2)
3
2 layers, ports 7-8, n SCID = 1, (OCC = 4)
4
1 layer, port 7, n SCID = 0, (OCC = 4)
4
2 layers, ports 11/13, n SCID = 0, (OCC = 4)
5
1 layer, port 7, n SCID = 1, (OCC = 4)
5
2 layers, ports 11/13, n SCID = 1, (OCC = 4)
6
1 layer, port 8, n SCID = 0, (OCC = 4)
6
3 layers, ports 7-9
7
1 layer, port 8, n SCID = 1, (OCC = 4)
7
4 layers, ports 7-10
8
1 layer, port 11, n SCID = 0, (OCC = 4)
8
5 layers, ports 7-11
9
1 layer, port 11, n SCID = 1, (OCC = 4)
9
6 layers, ports 7-12
10
1 layer, port 13, n SCID = 0, (OCC = 4)
10
7 layers, ports 7-13
11
1 layer, port 13, n SCID = 1, (OCC = 4)
11
8 layers, ports 7-14
12
2 layers, ports 7-8
12
Reserved
13
3 layers, ports 7-9
13
Reserved
14
4 layers, ports 7-10
14
Reserved
15
Reserved
15
Reserved
and
wherein n SCID is a scrambling identity.
15. The method of claim 1 , further comprising:
estimating channel information based on the DMRS; and
receiving downlink data based on the estimated channel information.
16. The terminal of claim 7 , wherein the controller is further configured to:
estimate channel information based on the DMRS, and
receive downlink data based on the estimated channel information.
17. The method of claim 5 , wherein a scrambling identity is identified based on the DMRS information when the DMRS information indicates that up to 2 layers are used and the length of the DMRS information is 4 bits.
18. The base station of claim 11 , wherein a scrambling identity is identified based on the DMRS information when the DMRS information indicates that up to 2 layers are used and the length of the DMRS information is 4 bits.