Resource management for 5G eV2X
Methods and systems are disclosed for resource management on Sidelink for vehicle to everything (V2X) scenarios. Example methods and systems for a Resource Structure on Sidelink are disclosed. Control and data channels may be Frequency Division Multiplexed (FDMed) or Time Division Multiplexed (TDMed) with an Orthogonal Frequency Division Multiplexing (OFDM) waveform. Example methods and systems for a Resource Configuration on Sidelink are disclosed. The resource configuration may be statically configured or may be locally configured. Example methods and systems for Assisted Resource Allocation are disclosed. Assisted Sensing may be performed by a group lead or RSU and local scheduling may be performed by a group lead or RSU.
1. A method comprising:
receiving a radio resource control (RRC) message comprising a configuration associated with a resource pool located in a sidelink bandwidth part on a sidelink shared channel;
determining a resource usage and one or more available resources in the resource pool,
wherein determining the one or more available resources in the resource pool comprises:
setting a time interval for a sensing window, wherein the time interval for the sensing window is used for evaluating resources for transmission of a sidelink shared channel transmission that is a periodic transmission or an aperiodic transmission, wherein the time interval for the sensing window is determined based on RRC signaling,
performing sidelink-reference signal received power (SL-RSRP) measurements on one or more resources within the resource pool, and
determining the one or more available resources in the resource pool based on a priority associated with the sidelink shared channel transmission and the SL-RSRP measurements;
selecting one or more resources from the one or more available resources in the resource pool for the sidelink shared channel transmission;
sending a scheduling assignment (SA) sidelink control information (SCI) on a sidelink control channel,
wherein the SA SCI indicates the one or more resources from the one or more available resources in the resource pool for the sidelink shared channel transmission,
wherein the SA SCI indicates one or more resources that can be used for hybrid automatic repeat request (HARQ) retransmission of the sidelink shared channel transmission, and
wherein the SA SCI includes a three-bit indication of the priority associated with the sidelink shared channel transmission; and
sending the sidelink shared channel transmission including a second SCI using the selected one or more resources.
2. The method of claim 1 , wherein determining the one or more available resources in the resource pool comprises at least one of:
sensing a resource usage by decoding a SCI for scheduling an initial transmission, pre-empting a scheduled or reserved resource, or reserving at least one of one or more repetitions or one or more retransmissions per HARQ feedback;
measuring at least one of a sidelink received signal strength indicator (SL-RSSI), a channel busy ratio, or a channel occupancy ratio; and
determining an available resource based on:
a resource that is not scheduled, not reserved, and not pre-empted;
a resource that is in a communication range or zone;
or a determination that at least one of an SL-RSRP measurement of the resource or an SL-RSSI measurement of the resource is below a threshold.
3. The method of claim 1 , wherein selecting the one or more resources comprises determining a time interval for a resource selection, wherein the time interval for the resource selection is determined based on at least one of:
one or more of a latency, or a reliability of a data packet to be transmitted; and
one or more of a repetition, a retransmission per HARQ feedback, or a next data packet transmission for a periodic traffic.
4. The method of claim 1 , wherein selecting the one or more resources comprises at least one of:
selecting one or more resources based on at least one of a latency, a reliability, or a communication range or zone of a data packet to be transmitted, or the measurement of interference or congestion; and
selecting one or more resources for at least one of scheduling or reserving SCI, initial transmission, repetitions, HARQ feedback, retransmissions per HARQ feedback, or a next data packet of a periodic traffic.
5. The method of claim 1 , wherein sending the sidelink shared channel transmission comprises:
determining, based on a measured congestion level, whether a congestion threshold has been exceeded, wherein the congestion threshold is based on at least one of a latency, a reliability, or a communication range or zone of a data packet to be transmitted; and
based on determining that the congestion threshold has not been exceeded:
sending the data packet.
6. An apparatus comprising a processor and a memory, the processor and memory configured to:
receive a radio resource control (RRC) message comprising a configuration associated with a resource pool located in a sidelink bandwidth part associated with a sidelink shared channel;
determine a resource usage and one or more available resources in the resource pool, wherein determining the one or more available resources in the resource pool comprises:
setting a time interval for a sensing window, wherein the time interval for the sensing window is used for evaluating resources for transmission of a sidelink shared channel transmission that is a periodic transmission or an aperiodic transmission, wherein the time interval for the sensing window is determined based on RRC signaling,
performing sidelink-reference signal received power (SL-RSRP) measurements on one or more resources within the resource pool, and
determining the one or more available resources in the resource pool based on a priority associated with the sidelink shared channel transmission and the SL-RSRP measurements;
select one or more resources from the one or more available resources in the resource pool for the sidelink shared channel transmission;
send a scheduling assignment (SA) sidelink control information (SCI) on a sidelink control channel, wherein the SA SCI indicates the one or more resources from the one or more available resources in the resource pool for the sidelink shared channel transmission, wherein the SA SCI indicates one or more resources that can be used for hybrid automatic repeat request (HARQ) retransmission of the sidelink shared channel transmission, and wherein the SA SCI includes a three-bit indication of the priority associated with the sidelink shared channel transmission; and
send the sidelink shared channel transmission including a second SCI using the selected one or more resources.
7. The apparatus of claim 6 , wherein determining the one or more available resources in the resource pool comprises at least one of:
sensing a resource usage by decoding a SCI for scheduling an initial transmission, pre-empting a scheduled or reserved resource, or reserving at least one of one or more repetitions or one or more retransmissions per HARQ feedback;
measuring at least one of a sidelink received signal strength indicator (SL-RSSI), a channel busy ratio, or a channel occupancy ratio; and
determining an available resource based on:
a resource that is not scheduled, not reserved, and not pre-empted;
a resource that is in a communication range or zone;
or a determination that at least one of an SL-RSRP measurement of the resource or an SL-RSSI measurement of the resource is below a threshold.
8. The apparatus of claim 6 , wherein selecting the one or more resources comprises determining a time interval for a resource selection, wherein the time interval for the resource selection is determined based on at least one of:
one or more of a latency, or a reliability of a data packet to be transmitted; and
one or more of a repetition, a retransmission per HARQ feedback, or a next data packet transmission for a periodic traffic.
9. The apparatus of claim 6 , wherein selecting the one or more resources comprises at least one of:
selecting one or more resources based on at least one of a latency, a reliability, or a communication range or zone of a data packet to be transmitted, or the measurement of interference or congestion; and
selecting one or more resources for at least one of scheduling or reserving SCI, initial transmission, repetitions, HARQ feedback, retransmissions per HARQ feedback, or a next data packet of a periodic traffic.
10. The apparatus of claim 6 , wherein sending the sidelink shared channel transmission comprises:
determining, based on a measured congestion level, whether a congestion threshold has been exceeded, wherein the congestion threshold is based on at least one of a latency, a reliability, or a communication range or zone of a data packet to be transmitted; and
based on determining that the congestion threshold has not been exceeded:
sending the data packet.
11. A non-transitory computer-readable storage medium storing instructions which, when executed by a processor, cause an apparatus to perform operations comprising:
receiving a radio resource control (RRC) message comprising a configuration associated with a resource pool located in a sidelink bandwidth part associated with a sidelink shared channel;
determining a resource usage and one or more available resources in the resource pool, wherein determining the one or more available resources in the resource pool comprises:
setting a time interval for a sensing window, wherein the time interval for the sensing window is used for evaluating resources for transmission of a sidelink shared channel transmission is a periodic transmission or an aperiodic transmission, wherein the time interval for the sensing window is determined based on RRC signaling,
performing sidelink-reference signal received power (SL-RSRP) measurements on one or more resources within the resource pool, and
determining the one or more available resources in the resource pool based on a priority associated with the sidelink shared channel transmission and the SL-RSRP measurements;
selecting one or more resources from the one or more available resources in the resource pool for the sidelink shared channel transmission;
sending a scheduling assignment (SA) sidelink control information (SCI) on a sidelink control channel, wherein the SA SCI indicates the one or more resources from the one or more available resources in the resource pool for the sidelink shared channel transmission, wherein the SA SCI indicates one or more resources that can be used for hybrid automatic repeat request (HARQ) retransmission of the sidelink shared channel transmission, and wherein the SA SCI includes a three-bit indication of the priority associated with the sidelink shared channel transmission; and
sending the sidelink shared channel transmission including a second SCI using the selected one or more resources.
12. The non-transitory computer-readable storage medium of claim 11 , wherein determining the one or more available resources in the resource pool comprises at least one of:
sensing a resource usage by decoding a SCI for scheduling an initial transmission, pre-empting a scheduled or reserved resource, or reserving at least one of one or more repetitions or one or more retransmissions per HARQ feedback;
measuring at least one of a sidelink received signal strength indicator (SL-RSSI), a channel busy ratio, or a channel occupancy ratio; and
determining an available resource based on:
a resource that is not scheduled, not reserved, and not pre-empted;
a resource that is in a communication range or zone; or
a determination that at least one of an SL-RSRP measurement of the resource or an SL-RSSI measurement of the resource is below a threshold.
13. The non-transitory computer-readable storage medium of claim 11 , wherein selecting the one or more resources comprises determining a time interval for a resource selection, wherein the time interval for the resource selection is determined based on at least one of:
one or more of a latency, or a reliability of a data packet to be transmitted; and
one or more of a repetition, a retransmission per HARQ feedback, or a next data packet transmission for a periodic traffic.
14. The non-transitory computer-readable storage medium of claim 11 , wherein selecting the one or more resources comprises at least one of:
selecting one or more resources based on at least one of a latency, a reliability, or a communication range or zone of a data packet to be transmitted, or the measurement of interference or congestion; and
selecting one or more resources for at least one of scheduling or reserving SCI, initial transmission, repetitions, HARQ feedback, retransmissions per HARQ feedback, or a next data packet of a periodic traffic.