Method and apparatus for performing QoS prediction based on UE autonomous prediction in NR V2X

1. A method for performing quality of service (QoS) prediction by a first apparatus, the method comprising:

transmitting, by the first apparatus, a direct communication request message for establishing a unicast link to a second apparatus,

wherein the direct communication request message includes an identifier of the first apparatus and information related to at least one service requested by the first apparatus and security information for an establishment of security between the first apparatus and the second apparatus;

receiving, by the first apparatus, a direct communication accept message from the second apparatus,

wherein the direct communication accept message includes an identifier of the second apparatus;

establishing, by the first apparatus, the unicast link between the first apparatus and the second apparatus;

receiving, by the first apparatus, QoS prediction information for determining whether to activate UE autonomous QoS prediction or network-assisted QoS prediction, from a network;

determining, by the first apparatus, to activate the UE autonomous QoS prediction, among the UE autonomous QoS prediction or the network-assisted QoS prediction, based on the QoS prediction information;

receiving, by the first apparatus, information for requesting the QoS prediction between the first apparatus and the second apparatus, from the second apparatus; and

performing, by the first apparatus, the UE autonomous QoS prediction between the first apparatus and the second apparatus, based on the determination to activate the UE autonomous QoS prediction.

2. The method of claim 1 , wherein the information for requesting the QoS prediction includes information on a service, and the QoS prediction is performed for the service.

3. The method of claim 2 , wherein the QoS prediction is performed, based on a prediction model among a plurality of prediction models.

4. The method of claim 3 , wherein the prediction model is a prediction model related to the service.

5. The method of claim 3 , wherein the prediction model is a default prediction model.

6. The method of claim 3 , wherein the plurality of prediction models are included in a UE autonomous QoS prediction configuration.

7. The method of claim 6 , wherein the UE autonomous QoS prediction configuration is received from the network.

8. The method of claim 6 , wherein the UE autonomous QoS prediction configuration is pre-configured in the first apparatus.

9. The method of claim 1 , wherein the QoS prediction is performed based on at least one of capability information of the first apparatus, a sidelink measurement result of the first apparatus, resource restriction information of the first apparatus, or on-going service information of the first apparatus.

10. The method of claim 1 , further comprising:

receiving a reporting object or reporting triggering condition, from the network, wherein the reporting object includes at least one of capability information, a sidelink measurement result, resource restriction information, or on-going service information.

11. The method of claim 10 , wherein the first apparatus receives the reporting triggering condition, and wherein the information for requesting the QoS prediction is received from the second apparatus based on whether the reporting triggering condition is satisfied.

12. The method of claim 1 , further comprising:

transmitting a result of the QoS prediction between the first apparatus and the second apparatus, to the second apparatus.

13. The method of claim 1 , wherein the first apparatus communicates with at least one of a mobile terminal, the network or autonomous vehicles other than the first apparatus.

14. The method of claim 1 , wherein the QoS prediction information includes at least one of Uu connectivity dependency information, geographic area information, time information, or frequency information.

15. The method of claim 1 , further comprising:

transmitting, by the first apparatus, a message for requesting the QoS prediction to the network, based on a determination not to activate the UE autonomous QoS prediction.

16. A first apparatus configured to perform quality of service (QoS) prediction, the first apparatus comprising:

at least one transceiver; at least one processor; and

at least one computer memory operably connectable to the at least one processor and storing instructions that, when executed, cause the at least one processor to perform operations comprising:

transmitting, via the at least one transceiver, a direct communication request message for establishing a unicast link to a second apparatus,.

wherein the direct communication request message includes an identifier of the first apparatus and information related to at least one service requested by the first apparatus and security information for an establishment of security between the first apparatus and the second apparatus;

receiving, via the at least one transceiver, a direct communication accept message from the second apparatus,

wherein the direct communication accept message includes an identifier of the second apparatus;

establishing, via the at least one transceiver, the unicast link between the first apparatus and the second apparatus;

receiving, via the at least one transceiver, QoS prediction information for determining whether to activate UE autonomous QoS prediction or network-assisted QoS prediction, from a network;

determining, via the at least one transceiver, among to activate the UE autonomous QoS prediction, the UE autonomous QoS prediction or the network-assisted QoS prediction, based on the QoS prediction information;

receiving, via the at least one transceiver, information for requesting the QoS prediction between the first apparatus and the second apparatus, from the second apparatus; and

performing, via the at least one transceiver, the UE autonomous QoS prediction between the first apparatus and the second apparatus, based on the determination to activate the UE autonomous QoS prediction.

17. A device configured to control a first apparatus, the device comprising:

one or more processors; and

one or more memories operably connectable to the one or more processors and storing instructions, wherein the one or more processors execute the instructions to:

transmit, by the first apparatus, a direct communication request message for establishing a unicast link to a second apparatus,

wherein the direct communication request message includes an identifier of the first apparatus and information related to at least one service requested by the first apparatus and security information for an establishment of security between the first apparatus and the second apparatus,

receive, by the first apparatus, a direct communication accept message from the second apparatus,

wherein the direct communication accept message includes an identifier of the second apparatus,

establish, by the first apparatus, the unicast link between the first apparatus and the second apparatus,

receive, by the first apparatus, QoS prediction information for determining whether to activate UE autonomous QoS prediction or network-assisted QoS prediction, from a network,

determine, by the first apparatus, to activate the UE autonomous QoS prediction, among the UE autonomous QoS prediction or the network-assisted QoS prediction, based on the QoS prediction information,

receive, by the first apparatus, information for requesting the QoS prediction between the first apparatus and the second apparatus, from the second apparatus, and

perform, by the first apparatus, the UE autonomous QoS prediction between the first apparatus and the second apparatus, based on the determination to activate the UE autonomous QoS prediction.