Method and apparatus for inter-user equipment coordination signaling
Methods and apparatuses for inter user equipment (UE) coordination signaling. A method of operating a UE includes determining a first set of first sidelink (SL) resources based on SL sensing and resource exclusion; selecting a first one or more SL resources within the first determined set for reservation, transmitting information about the first one or more SL resources, and receiving inter UE co-ordination information indicating whether a SL resource in the first one or more SL resources has a conflict. The method further includes transmitting on one of the first one or more SL resources, when the one SL resource does not have a conflict; and determining a second set of SL resources based on SL sensing and resource exclusion, and selecting a second one or more SL resources within the second set for transmission and reservation, when all of the first one or more SL resources have a conflict.
1. A first user equipment (UE) in a communication system, the first UE comprising:
a processor configured to:
decode a physical sidelink control channel (PSCCH), wherein the PSCCH includes a resource reservation period (P rsvp ) field in units of milliseconds (ms), and
convert P rsvp into P′ rsvp in logical slots as:
P
rsvp
′
=
⌈
L
10240
ms
×
P
rsvp
⌉
wherein:
L is a value related to a number of slots that belongs to a resource pool,
L is defined based on a number of slots corresponding to bits having value 1 within a bitmap, among a set of slots excluding at least one non-SL slot, at least one non S-SSB slot, and at least one reserved slot,
L
T
=
1
10240
ms
×
(
2
μ
×
10240
-
N
nonSL
-
N
S
-
SSB
-
N
reserved
)
×
L
bitmap
,
one
L
bitmap
,
T is a period in units of ms,
μ: is a sub-carrier spacing configuration,
N nonSL : is a number of non-SL slots,
N S-SSB : is a number of S-SSB slots,
N reserved : is a number of reserved slots,
N bitmap,one : is a number of bits having value 1 in the bitmap associated with the resource pool, and
L bitmap : is a total number of bits in the bitmap associated with the resource pool.
2. A method performed by a first user equipment (UE) in a communication system, the method comprising:
decoding a physical sidelink control channel (PSCCH), wherein the PSCCH includes a resource reservation period (P rsvp ) field in units of milliseconds (ms), and
converting P rsvp into P′ rsvp in logical slots as:
P
rsvp
′
=
⌈
L
10240
ms
×
P
rsvp
⌉
wherein:
L is a value related to a number of slots that belongs to a resource pool, and
L is defined based on a number of slots corresponding to bits having value 1 within a bitmap, among a set of slots excluding at least one non-SL slot, at least one non S-SSB slot, and at least one reserved slot,
L
T
=
1
10240
ms
×
(
2
μ
×
10240
-
N
nonSL
-
N
S
-
SSB
-
N
reserved
)
×
L
bitmap
,
one
L
bitmap
,
T is a period in units of ms,
μ: is a sub-carrier spacing configuration,
N nonSL : is a number of non-SL slots,
N S-SSB : is a number of S-SSB slots,
N reserved : is a number of reserved slots,
N bitmap,one : is a number of bits having value 1 in the bitmap associated with the resource pool, and
L bitmap : is a total number of bits in the bitmap associated with the resource pool.