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:
identifying second sidelink control information (SCI) for transmitting sidelink data;
identifying first SCI for transmitting the sidelink data based on the second SCI;
identifying resources for the first SCI and the second SCI; and
transmitting, to a second terminal, the first SCI and the second SCI on the identified resources,
wherein the resource for the second SCI is identified based on a number of coded symbols for the second SCI,
wherein the number of coded symbols for the second SCI is identified based on a parameter γ and a beta offset associated with the first SCI, and
wherein the parameter γ corresponds to a number of one or more remaining resource elements in a resource block to which a last coded symbols for the second SCI is mapped.
2. The method of claim 1 , wherein the beta offset is indicated by a bit field included in the first SCI and the bit field indicates one of one or more values configured by resource pool configuration information.
3. The method of claim 2 , wherein the number of coded symbols for the second SCI is further identified based on a parameter α, for controlling the number of coded symbols for the second SCI, configured by the resource pool configuration information.
4. The method of claim 1 , wherein the number of coded symbols for the second SCI is further identified based on a parameter R, which is a coding rate indicated by a modulation and coding scheme (MCS) field in the first SCI.
5. The method of claim 1 , wherein the number of coded symbols for the second SCI is 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
symbol
PSSCH
-
1
M
sc
SCI
2
(
l
)
,
where O SCI2 is a number of bits of second SCI bits, L SCI2 is a number of a cyclic redundancy check (CRC) bits for the second SCI, β offset SCI2 is the beta offset, a is a parameter for controlling the number of coded symbols for the second SCI, R is a coding rate of physical sidelink shared channel (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.
6. A method performed by a second terminal in a communication system, the method comprising:
receiving, from a first terminal, first sidelink control information (SCI) for receiving sidelink data;
identifying a resource for second SCI for receiving the sidelink data based on the first SCI; and
performing a decoding of the second SCI based on the identified resource,
wherein the identified resource for the second SCI is identified based on a number of coded symbols for the second SCI,
wherein the number of coded symbols for the second SCI is identified based on a parameter γ and a beta offset associated with the first SCI, and
wherein the parameter γ corresponds to a number of one or more remaining resource elements in a resource block to which a last coded symbols for the second SCI is mapped.
7. The method of claim 6 , wherein the beta offset is indicated by a bit field included in the first SCI and the bit field indicates one of one or more values configured by resource pool configuration information.
8. The method of claim 7 , wherein the number of coded symbols for the second SCI is further identified based on a parameter α, for controlling the number of coded symbols for the second SCI, configured by the resource pool configuration information.
9. The method of claim 6 , wherein the number of coded symbols for the second SCI is further identified based on a parameter R, which is a coding rate indicated by a modulation and coding scheme (MCS) field in the first SCI.
10. The method of claim 6 , wherein the number of coded symbols for the second SCI is 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
symbol
PSSCH
-
1
M
sc
SCI
2
(
l
)
,
where O SCI2 is a number of bits of second SCI bits, L SCI2 is a number of a cyclic redundancy check (CRC) bits for the second SCI, β offset SCI2 is the beta offset, α is a parameter for controlling the number of coded symbols for the second SCI, R is a coding rate of physical sidelink shared channel (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.
11. A first terminal in a communication system, the first terminal comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
identify second sidelink control information (SCI) for transmitting sidelink data,
identify first SCI for transmitting the sidelink data based on the second SCI,
identify resources for the first SCI and the second SCI, and
transmit, to a second terminal, the first SCI and the second SCI on the identified resources,
wherein the resource for the second SCI is identified based on a number of coded symbols for the second SCI,
wherein the number of coded symbols for the second SCI is identified based on a parameter γ and a beta offset associated with the first SCI, and
wherein the parameter γ corresponds to a number of one or more remaining resource elements in a resource block to which a last coded symbols for the second SCI is mapped.
12. The first terminal of claim 11 , wherein the beta offset is indicated by a bit field included in the first SCI and the bit field indicates one of one or more values configured by resource pool configuration information.
13. The first terminal of claim 12 , wherein the number of coded symbols for the second SCI is further identified based on a parameter α, for controlling the number of coded symbols for the second SCI, configured by the resource pool configuration information.
14. The first terminal of claim 11 , wherein the number of coded symbols for the second SCI is further identified based on a parameter R, which is a coding rate indicated by a modulation and coding scheme (MCS) field in the first SCI.
15. The first terminal of claim 11 , wherein the number of coded symbols for the second SCI is 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
symbol
PSSCH
-
1
M
sc
SCI
2
(
l
)
,
where O SCI2 is a number of bits of second SCI bits, L SCI2 is a number of a cyclic redundancy check (CRC) bits for the second SCI, β offset SCI2 is the beta offset, α is a parameter for controlling the number of coded symbols for the second SCI, R is a coding rate of physical sidelink shared channel (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.
16. A second terminal in a communication system, the second terminal comprising:
a transceiver; and
at least one processor coupled with the transceiver and configured to:
receive, from a first terminal, first sidelink control information (SCI) for receiving sidelink data,
identify a resource for second SCI for receiving the sidelink data based on the first SCI, and
perform a decoding of the second SCI based on the identified resource,
wherein the identified resource for the second SCI is identified based on a number of coded symbols for the second SCI,
wherein the number of coded symbols for the second SCI is identified based on a parameter γ and a beta offset associated with the first SCI, and
wherein the parameter γ corresponds to a number of one or more remaining resource elements in a resource block to which a last coded symbols for the second SCI is mapped.
17. The second terminal of claim 16 , wherein the beta offset is indicated by a bit field included in the first SCI and the bit field indicates one of one or more values configured by resource pool configuration information.
18. The second terminal of claim 17 , wherein the number of coded symbols for the second SCI is further identified based on a parameter α, for controlling the number of coded symbols for the second SCI, configured by the resource pool configuration information.
19. The second terminal of claim 16 , wherein the number of coded symbols for the second SCI is further identified based on a parameter R, which is a coding rate indicated by a modulation and coding scheme (MCS) field in the first SCI.
20. The second terminal of claim 16 , wherein the number of coded symbols for the second SCI is 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
symbol
PSSCH
-
1
M
sc
SCI
2
(
l
)
,
where O SCI2 is a number of bits of second SCI bits, L SCI2 is a number of a cyclic redundancy check (CRC) bits for the second SCI, β offset SCI2 is the beta offset, α is a parameter for controlling the number of coded symbols for the second SCI, R is a coding rate of physical sidelink shared channel (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.