Methods for resource reservation to satisfy new radio (NR) vehicular communications (V2X) quality of service (QOS) requirements

1. A method, performed by a wireless transmit/receive unit (WTRU), for reserving sidelink resources of any number of sidelink radio bearers, the method comprising:

determining a resource configuration for periodically transmitting a resource reservation signal (RRS) for reserving resources for periodic data transmitted by the WTRU via a sidelink radio bearer, the resource configuration including information indicating any of a size of the RRS, a period of the RRS, and a pattern of the RRS;

determining available sidelink resources for the WTRU's transmission of the periodic data via the sidelink radio bearer; and

transmitting the RRS according to the determined resource configuration, the RRS including information indicating: (1) reservation information associated with the determined available sidelink resources, and (2) any of: any number of bearer identifiers (IDs), and Quality of Service (QoS) information.

2. The method of claim 1 , wherein the resource configuration is determined according to any of: (1) a channel busy ratio (CBR), (2) QoS characteristics of the periodic data to be transmitted, (3) a number of active QoS flows, and (4) a number of QoS flows having the same or related PC5 QoS identifiers (PQIs) or packet flow identifiers (PFIs).

3. The method of claim 1 , wherein the reservation information includes information indicating a period of the resource reservation for the periodic data, and

wherein the period of the resource reservation for the periodic data is determined according to any of: a channel bandwidth, a WTRU capability, a channel busy ratio (CBR), a number of any of carriers or bandwidth parts (BWPs), a sensing window, a network (NW) configuration, QoS characteristics of the periodic data to be transmitted, a number of QoS flows which are active, and a number of QoS flows having any of the same or related PC5 QoS identifiers (PQIs) or packet flow identifiers (PFIs).

4. The method of claim 3 , wherein the sensing window is any of the WTRU's sensing window or another WTRU's sensing window,

wherein the CBR is a measured CBR, and

wherein the QoS characteristics are associated with any of a flow or a bearer mapped to the reserved resources.

5. The method of claim 1 , wherein the WTRU is configured with information indicating any number of patterns of resource reservation, and

wherein each pattern is respectively associated with a QoS aspect of a bearer according to any of resources or a current channel busy ratio (CBR).

6. The method of claim 1 , wherein the WTRU is configured with information indicating any number of rules for pattern selection.

7. The method of claim 1 , further comprising transmitting, by the WTRU, the periodic data, including any of: a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), hybrid automatic repeat request (HARQ) resources for HARQ transmissions by any of the WTRU or a peer WTRU, a CSI required for a unicast link or a multicast link, a CSI that is feedback by any of the WTRU or a peer WTRU.

8. The method of claim 1 , wherein the message further includes any of: any of time, frequency, and beam resources to be reserved, a periodicity of the reserved resource, a granularity of the reserved resources, and an index indicating a pattern of resources, and

wherein the pattern may be for any of: periodicity of resources in time, number of consecutive slots of each sub-resource in a set of periodic resources or pattern, time and frequency resource between one sub-resource and a subsequent/related sub-resource, an offset in frequency, and a frequency hopping pattern.

9. A wireless transmit/receive unit (WTRU) for reserving sidelink resources of any number of sidelink radio bearers, the WTRU comprising a transmitter, a receiver, a processor and memory, configured to:

determine a resource configuration for periodically transmitting a resource reservation signal (RRS) for reserving resources for periodic data transmitted by the WTRU via a sidelink radio bearer, the resource configuration including information indicating any of a size of the RRS, a period of the RRS, and a pattern of the RRS;

determine available sidelink resources for the WTRU's transmission of the periodic data via the sidelink radio bearer; and

transmit the RRS according to the determined resource configuration, the RRS including information indicating: (1) reservation information associated with the determined available sidelink resources, and (2) any of: any number of bearer identifiers (IDs), and Quality of Service (QoS) information.

10. The WTRU of claim 9 , wherein the resource configuration is determined according to any of: (1) a channel busy ratio (CBR), (2) QoS characteristics of the periodic data to be transmitted, (3) a number of active QoS flows, and (4) a number of QoS flows having the same or related PC5 QoS identifiers (PQIs) or packet flow identifiers (PFIs).

11. The WTRU of claim 9 , wherein the reservation information includes information indicating a period of the resource reservation for the periodic data,

wherein the period of the resource reservation for the periodic data is determined according to any of: a channel bandwidth, a WTRU capability, a channel busy ratio (CBR), a number of any of carriers or bandwidth parts (BWPs), a sensing window, a network (NW) configuration, QoS characteristics of the periodic data to be transmitted, a number of QoS flows which are active, and a number of QoS flows having any of the same or related PC5 QoS identifiers (PQIs) or packet flow identifiers (PFIs).

12. The WTRU of claim 11 , wherein the sensing window is any of the WTRU's sensing window or another WTRU's sensing window,

wherein the CBR is a measured CBR, and

wherein the QoS characteristics are associated with any of a flow or a bearer mapped to the reserved resources.

13. The WTRU of claim 9 , wherein the WTRU is configured with information indicating any number of patterns of resource reservation, and

wherein each pattern is respectively associated with a QoS aspect of a bearer according to any of resources or a current channel busy ratio (CBR).

14. The WTRU of claim 9 , wherein the WTRU is configured with information indicating any number of rules for pattern selection.

15. The WTRU of claim 9 , further configured to transmit the periodic data by the WTRU, the periodic data including any of: a physical sidelink shared channel (PSSCH), a physical sidelink control channel (PSCCH), hybrid automatic repeat request (HARQ) resources for HARQ transmissions by any of the WTRU or a peer WTRU, a CSI required for a unicast/multicast link, and a CSI feedback by any of the WTRU or a peer WTRU.

16. The WTRU of claim 9 , wherein the message further includes any of: any of time, frequency, and beam resources to be reserved, a periodicity of the reserved resource, a granularity of the reserved resources, and an index indicating a pattern of resources,

wherein the pattern may be for any of: periodicity of resources in time, number of consecutive slots of each sub-resource in a set of periodic resources or pattern, time and frequency resource between one sub-resource and a subsequent/related sub-resource, an offset in frequency, and a frequency hopping pattern.

17. A method, performed by a wireless transmit/receive unit (WTRU), for reserving sidelink resources of a sidelink radio bearer, the method comprising:

receiving a system information block (SIB) including information indicating: (1) any number of resource configurations; and (2) any number of validity areas of the SIB;

determining sidelink resources available for transmission of the periodic data via the sidelink radio bearer according to at least the validity area of the SIB; and

transmitting, according to one of the resource configurations, a message including a resource reservation including information indicating reservation of the available sidelink resources for transmission of the periodic data by the WTRU.

18. The method of claim 17 , wherein the WTRU is configured with any number of areas, zones, or locations, wherein the any of the areas, zones, or locations are associated with any number of validity areas of a SIB.

19. The method of claim 17 , wherein any number of cell IDs are associated with any of: the validity area of the SIB, or any number of resource configurations.

20. The method of claim 17 , further comprising determining the one of the resource configurations according to any of: (1) a channel busy ratio (CBR), (2) QoS characteristics of the periodic data to be transmitted, (3) a number of active QoS flows, and (4) a number of QoS flows having the same or related PC5 QoS identifiers (PQIs) or packet flow identifiers (PFIs).