Method and apparatus for transmission and reception of sidelink control information in wireless communication system
A communication method and a system for converging a 5th-generation (5G) communication system for supporting higher data rates beyond a 4th-generation (4G) system with a technology for Internet of things (IoT) are provided. The disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as a smart home, a smart building, a smart city, a smart car, a connected car, health care, digital education, a smart retail, security and safety services. The disclosure provides a method and an apparatus for efficient transmission and reception of control information in a sidelink communication.
1. A method performed by a first terminal in a communication system, the method comprising:
obtaining second sidelink control information (SCI) for sidelink data;
performing an attach of cyclic redundancy check (CRC) bits for the second SCI;
performing an encoding of the second SCI;
generating coded modulated symbols based on the encoded second SCI;
mapping the coded modulated symbols of the second SCI in resources on a physical sidelink shared channel (PSSCH); and
transmitting, to a second terminal, the PSSCH comprising the sidelink data and the second SCI,
wherein a number of the coded modulated symbols is identified based on a parameter γ, and the parameter γ corresponds to a number of one or more remaining resource elements in a resource block to which a last coded modulated symbols of the second SCI is mapped.
2. The method of claim 1 ,
wherein the number of the coded modulated symbols is further identified based on a sum of the parameter γ and a minimum value identified based on between
⌈
(
O
SCI
2
+
L
SCI
2
)
·
β
offset
SCI
2
R
·
Q
m
⌉
and
α
∑
l
=
0
N
s
y
m
b
o
l
-
1
P
S
S
C
H
M
s
c
SCI
2
(
l
)
,
and
where O SCI2 is a number of bits of second SCI bits, L SCI2 is a number of the CRC bits for the second SCI, β offset SCI2 is the beta offset, α is a parameter for controlling the number of coded modulated symbols for the second SCI, R is a coding rate of the PSSCH corresponding to the sidelink data, Q m is a modulation order of the second SCI, N symbol PSSCH is a number of a symbols for the PSSCH, and M sc SCI2 (l) is a number of one or more resource elements which is capable of being used for transmitting the second SCI in an orthogonal frequency division multiplexing (OFDM) symbol.
3. The method of claim 1 , further comprising:
obtaining first SCI based on the obtained second SCI,
wherein the first SCI includes resource allocation information on the PSSCH.
4. The method of claim 1 , wherein the coded modulated symbols of the second SCI are mapped in resource elements in an OFDM symbol containing a first demodulation reference signal (DMRS) of the PSSCH.
5. The method of claim 1 , wherein the second SCI includes a hybrid automatic repeat request (HARQ) process identifier, a new data indicator (NDI), a redundancy version (RV) of the PSSCH.
6. The method of claim 1 , wherein the coded modulated symbols of the second SCI are mapped frequency first in a resource block unit.
7. A method performed by a second terminal in a communication system, the method comprising:
receiving, from a first terminal, a physical sidelink shared channel (PSSCH) comprising sidelink data and second sidelink control information (SCI);
obtaining coded modulated symbols of the second SCI from resources on the PSSCH;
identifying the second SCI from the coded modulated symbols of the second SCI,
wherein a number of the coded modulated symbols is based on a parameter γ, and the parameter γ corresponds to a number of one or more remaining resource elements in a resource block to which a last coded modulated symbols of the second SCI is mapped.
8. The method of claim 7 ,
wherein the number of the coded modulated symbols is further based on a sum of the parameter γ and a minimum value identified based on between
⌈
(
O
SCI
2
+
L
SCI
2
)
·
β
offset
SCI
2
R
·
Q
m
⌉
and
α
∑
l
=
0
N
s
y
m
b
o
l
-
1
P
S
S
C
H
M
s
c
SCI
2
(
l
)
,
and
where O SCI2 is a number of bits of second SCI bits, L SCI2 is a number of the CRC bits for the second SCI, β offset SCI2 is the beta offset, α is a parameter for controlling the number of coded modulated symbols for the second SCI, R is a coding rate of the PSSCH corresponding to the sidelink data, Q m is a modulation order of the second SCI, N symbol PSSCH is a number of a symbols for the PSSCH, and M sc SCI2 (l) is a number of one or more resource elements which is capable of being used for transmitting the second SCI in an orthogonal frequency division multiplexing (OFDM) symbol.
9. The method of claim 7 , further comprising:
receiving, from the first terminal, a physical sidelink control channel (PSCCH) comprising first SCI,
wherein the first SCI includes resource allocation information on the PSSCH.
10. The method of claim 7 , wherein the coded modulated symbols of the second SCI are mapped in resource elements in an OFDM symbol containing a first demodulation reference signal (DMRS) of the PSSCH.
11. The method of claim 7 , wherein the second SCI includes a hybrid automatic repeat request (HARQ) process identifier, a new data indicator (NDI), an redundancy version (RV) of the PSSCH.
12. A first terminal in a communication system, the first terminal comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
obtain second sidelink control information (SCI) for sidelink data,
perform an attach of cyclic redundancy check (CRC) bits for the second SCI,
perform an encoding of the second SCI,
generate coded modulated symbols based on the encoded second SCI,
map the coded modulated symbols of the second SCI in resources on a physical sidelink shared channel (PSSCH), and
transmit, to a second terminal, the PSSCH comprising the sidelink data and the second SCI,
wherein a number of the coded modulated symbols is identified based on a parameter γ, and the parameter γ corresponds to a number of one or more remaining resource elements in a resource block to which a last coded modulated symbols of the second SCI is mapped.
13. The first terminal of claim 12 ,
wherein the number of the coded modulated symbols is further identified based on a sum of the parameter γ and a minimum value identified based on between
⌈
(
O
SCI
2
+
L
SCI
2
)
·
β
offset
SCI
2
R
·
Q
m
⌉
and
α
∑
l
=
0
N
s
y
m
b
o
l
-
1
P
S
S
C
H
M
s
c
SCI
2
(
l
)
,
and
where O SCI2 is a number of bits of second SCI bits, L SCI2 is a number of the CRC bits for the second SCI, β offset SCI2 is the beta offset, α is a parameter for controlling the number of coded modulated symbols for the second SCI, R is a coding rate of the PSSCH corresponding to the sidelink data, Q m is a modulation order of the second SCI, N symbol PSSCH is a number of a symbols for the PSSCH, and M sc SCI2 (l) is a number of one or more resource elements which is capable of being used for transmitting the second SCI in an orthogonal frequency division multiplexing (OFDM) symbol.
14. The first terminal of claim 13 ,
wherein the controller is further configured to obtaining first SCI based on the obtained second SCI, and
wherein the first SCI includes resource allocation information on the PSSCH.
15. The first terminal of claim 13 , wherein the coded modulated symbols of the second SCI are mapped in resource elements in an OFDM symbol containing a first demodulation reference signal (DMRS) of the PSSCH.
16. The first terminal of claim 13 , wherein the second SCI includes a hybrid automatic repeat request (HARQ) process identifier, a new data indicator (NDI), a redundancy version (RV) of the PSSCH.
17. The first terminal of claim 13 , wherein the coded modulated symbols of the second SCI are mapped frequency first, then mapped in a next symbol.
18. A second terminal in a communication system, the second terminal comprising:
a transceiver; and
a controller coupled with the transceiver and configured to:
receive, from a first terminal, a physical sidelink shared channel (PSSCH) comprising sidelink data and second sidelink control information (SCI),
obtain coded modulated symbols of the second SCI from resources on the PSSCH, and
identify the second SCI from the coded modulated symbols of the second SCI,
wherein a number of the coded modulated symbols is based on a parameter γ, and the parameter γ corresponds to a number of one or more remaining resource elements in a resource block to which a last coded modulated symbols of the second SCI is mapped.
19. The second terminal of claim 18 ,
wherein the number of the coded modulated symbols is further based on a sum of the parameter γ and a minimum value identified based on between
⌈
(
O
SCI
2
+
L
SCI
2
)
·
β
offset
SCI
2
R
·
Q
m
⌉
and
α
∑
l
=
0
N
s
y
m
b
o
l
-
1
P
S
S
C
H
M
s
c
SCI
2
(
l
)
,
and
where O SCI2 is a number of bits of second SCI bits, L SCI2 is a number of the CRC bits for the second SCI, β offset SCI2 is the beta offset, α is a parameter for controlling the number of coded modulated symbols for the second SCI, R is a coding rate of the PSSCH corresponding to the sidelink data, Q m is a modulation order of the second SCI, N symbol PSSCH is a number of a symbols for the PSSCH, and M sc SCI2 (l) is a number of one or more resource elements which is capable of being used for transmitting the second SCI in an orthogonal frequency division multiplexing (OFDM) symbol.
20. The second terminal of claim 18 ,
wherein the controller is further configured to receive, from the first terminal, a physical sidelink control channel (PSCCH) comprising first SCI, and
wherein the first SCI includes resource allocation information on the PSSCH.
21. The second terminal of claim 18 , wherein the coded modulated symbols of the second SCI are mapped in resource elements in an OFDM symbol containing a first demodulation reference signal (DMRS) of the PSSCH.
22. The second terminal of claim 18 , wherein the second SCI includes a hybrid automatic repeat request (HARQ) process identifier, a new data indicator (NDI), an redundancy version (RV) of the PSSCH.