Method and apparatus for performing QoS prediction based on network assistance in NR V2X

1. A method for receiving a result of a quality of service (QoS) prediction by a first user equipment (UE), the method comprising:

transmitting at least one sidelink synchronization signal (SLSS);

transmitting at least one physical sidelink broadcast channel (PSBCH);

receiving, from a second UE, a direct communication request message for sidelink unicast service;

establishing a direct connection for the sidelink unicast service between the first UE and a second UE;

receiving, from the second UE, a first request message for requesting the QoS prediction for the sidelink unicast service between the first UE and a second UE;

transmitting, to the second UE, a first UE information message;

receiving, from the second UE, a second UE information message;

transmitting, to a network, a second request message for requesting the QoS prediction for the sidelink unicast service between the first UE and the second UE; and

receiving, from the network, the result of the QoS prediction for the sidelink unicast service between the first UE and the second UE,

wherein the at least one SLSS includes a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS).

2. The method of claim 1 , wherein the QoS prediction is performed by the network.

3. The method of claim 2 , wherein the QoS prediction is performed based on at least one of capability information of the first UE, capability information of the second UE, a sidelink measurement result of the first UE, a sidelink measurement result of the second UE, resource restriction information of the first UE, resource restriction information of the second UE, on-going service information of the first UE, or on-going service information of the second UE.

4. The method of claim 1 , wherein the first request message includes at least one of information related to a service related to the QoS prediction or information related to connectivity status of the second UE.

5. The method of claim 4 , wherein the information related to the service includes information related to required QoS related to the service.

6. The method of claim 1 , wherein the first request message includes information related to a time during which the QoS prediction is valid.

7. The method of claim 1 , wherein the first request message includes information related to an area in which the QoS prediction is valid.

8. The method of claim 1 , further comprising:

receiving a network-assisted QoS prediction configuration, from the network.

9. The method of claim 8 , wherein the network-assisted QoS prediction configuration includes at least one of a reporting object or reporting triggering condition.

10. The method of claim 9 , 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 9 , wherein the first request message is received from the second UE based on whether the reporting triggering condition is satisfied.

12. The method of claim 1 , further comprising:

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

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

14. A first user equipment (UE) receiving a result of a QoS prediction, the first UE comprising:

at least one transceiver; and

at least one processor coupled to the at least one transceiver and configured to:

transmit at least one sidelink synchronization signal (SLSS);

transmit at least one physical sidelink broadcast channel (PSBCH);

receive, from a second UE, a direct communication request message for sidelink unicast service;

establish a direct connection for the sidelink unicast service between the first UE and a second UE;

receive, from the second UE, a first request message for requesting the QoS prediction for the sidelink unicast service between the first UE and the second UE;

transmit, to the second UE, a first UE information message;

receive, from the second UE, a second UE information message;

transmit, to a network, a second request message for requesting the QoS prediction for the sidelink unicast service between the first UE and the second UE; and

receive, from the network, the result of the QoS prediction for the sidelink unicast service between the first UE and the second UE,

wherein the at least one SLSS includes a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS).

15. A processing device configured to control a first user equipment (UE) to operate in a wireless communication system, the processing device comprising:

at least one processor; and

at least one computer memory operably connected to the at least one processor and storing instructions that, based on being executed by the at least one processor, perform operations comprising:

transmitting at least one sidelink synchronization signal (SLSS);

transmitting at least one physical sidelink broadcast channel (PSBCH);

receiving, from a second UE, a direct communication request message for sidelink unicast service;

establishing a direct connection for the sidelink unicast service between the first UE and a second UE;

receiving, from the second UE, a first request message for requesting the QoS prediction for the sidelink unicast service between the first UE and a second UE;

transmitting, to the second UE, a first UE information message;

receiving, from the second UE, a second UE information message;

transmitting, to a network, a second request message for requesting the QoS prediction for the sidelink unicast service between the first UE and the second UE; and

receiving, from the network, the result of the QoS prediction for the sidelink unicast service between the first UE and the second UE,

wherein the at least one SLSS includes a primary sidelink synchronization signal (PSSS) and a secondary sidelink synchronization signal (SSSS).