Resource partitioning for pre-emption indication
Embodiments of a User Equipment (UE), Generation Node-B (gNB) and methods of communication are disclosed herein. The UE may attempt to decode sidelink synchronization signals (SLSSs) received on component carriers (CCs) of a carrier aggregation. In one configuration, synchronization resources for SLSS transmissions may be aligned across the CCs at subframe boundaries in time, restricted to a portion of the CCs, and restricted to a same sub-frame. The UE may, for multiple CCs, determine a priority level for the CC based on indicators in the SLSSs received on the CC. The UE may select, from the CCs on which one or more SLSSs are decoded, the CC for which the determined priority level is highest. The UE may determine a reference timing for sidelink communication based on the one or more SLSSs received on the selected CC.
1. An apparatus comprising:
memory; and
processing circuitry in communication with the memory, wherein the processing circuitry is configured to:
determine a pre-emption of time-frequency resources for transmission of low latency traffic; and
transmit control signaling that indicates the pre-emption of time-frequency resources via a bitmap, wherein bits of the bitmap are indexed between a least significant bit (LSB) and a most significant bit (MSB), and wherein each bit of the bitmap corresponds to a time partition with no granularity in frequency.
2. The apparatus of claim 1 ,
wherein the bitmap comprises 14 bits.
3. The apparatus of claim 1 ,
wherein the resource is divided into 14 time partitions.
4. The apparatus of claim 1 ,
wherein each bit the bitmap indicates whether or not a corresponding resource is pre-empted.
5. The apparatus of claim 4 ,
wherein a bit value of 1 indicates that the corresponding resource is pre-empted.
6. The apparatus of claim 4 ,
wherein a bit value of 0 indicates that the corresponding resource is not pre-empted.
7. The apparatus of claim 1 ,
wherein the bitmap in included in a group common downlink control information.
8. the apparatus of claim 1 ,
wherein at least a part of the pre-empted time-frequency resources are used for transmission of the low latency traffic.
9. The apparatus of claim 1 ,
wherein the bitmap corresponds to a set of M Orthogonal Frequency Division Multiplexing (OFDM) symbol groups.
10. A method for indicating pre-emption of pre-emption of time-frequency resources for transmission of low latency traffic, comprising:
a base station,
determining a pre-emption of time-frequency resources for transmission of low latency traffic; and
transmitting control signaling that indicates the pre-emption of time-frequency resources via a bitmap, wherein bits of the bitmap are indexed between a least significant bit (LSB) and a most significant bit (MSB), and wherein each bit of the bitmap corresponds to a time partition with no granularity in frequency.
11. The method of claim 10 ,
wherein the bitmap comprises 14 bits.
12. The method of claim 10 ,
wherein the resource is divided into 14 time partitions.
13. The method of claim 10 ,
wherein bits of the bitmap are indexed between a least significant bit (LSB) and a most significant bit (MSB).
14. The method of claim 10 ,
wherein each bit the bitmap indicates whether or not a corresponding resource is pre-empted, wherein a bit value of 1 indicates that the corresponding resource is pre-empted, and wherein a bit value of 0 indicates that the corresponding resource is not pre-empted.
15. The method of claim 10 ,
wherein the bitmap corresponds to a set of M Orthogonal Frequency Division Multiplexing (OFDM) symbol groups.
16. The method of claim 10 ,
wherein the bitmap is in included in a group common downlink control information.
17. A user equipment (UE) comprising:
a transceiver to receive one or more component carriers (CCs);
one or more antennas coupled to the transceiver; and
processing circuitry in communication with the transceiver and configured to perform operations including:
decode control signaling that indicates a pre-emption of time-frequency resources via a bitmap, wherein bits of the bitmap are indexed between a least significant bit (LSB) and a most significant bit (MSB), and wherein each bit of the bitmap corresponds to a time partition with no granularity in frequency.
18. The UE of claim 17 ,
wherein the bitmap comprises 14 bits, and wherein the resource is divided into 14 time partitions.
19. The UE of claim 17 ,
wherein each bit the bitmap indicates whether or not a corresponding resource is pre-empted, wherein a bit value of 1 indicates that the corresponding resource is pre-empted, and wherein a bit value of 0 indicates that the corresponding resource is not pre-empted.
20. The UE of claim 17 ,
wherein the bitmap is in included in a group common downlink control information.