Radio resource switching in platooning

1. A network apparatus, comprising:

at least one memory including computer program code;

at least one processor configured to execute the computer program code and cause the network apparatus at least to,

monitor whether a handover request from a platoon leader of a platoon is received from a source cell,

the handover request from the platoon leader requesting a radio handover from the source cell to a target cell,

the platoon including the platoon leader and one or more platoon members, and

the handover request including an identifier of the platoon, the identifier of the platoon comprising at least one of, a position and an identifier of a dedicated platoon member from the one or more platoon members, the dedicated platoon member being different from the platoon leader;

send a new resource allocation to the platoon leader after the handover request from the platoon leader is received;

inform the source cell of the new resource allocation along with the identifier of the platoon, an identifier of the platoon leader, and a reference to the handover request from the platoon leader; and

configure the platoon leader with the new resource allocation in response to a trigger event occurring, the trigger event occurring when a handover request from the dedicated platoon member is received.

2. The network apparatus according to claim 1 , wherein the at least one processor is configured to execute the computer program code and cause the network apparatus at least to

judge whether all resources of a former resource allocation may be used by the platoon in the target cell, wherein the former resource allocation is received from the platoon leader or the source cell with respect to the platoon; and

inhibit at least one of the informing and the configuring if all resources of the former resource allocation may be used by the platoon in the target cell.

3. The network apparatus according to claim 1 , wherein the at least one processor is configured to execute the computer program code and cause the network apparatus at least to

judge whether at least one resource of a former resource allocation may be used by the platoon in the target cell, wherein the former resource allocation is received from the platoon leader or the source cell with respect to the platoon; and

prohibit the target cell from configuring a user equipment not belonging to the platoon with the at least one resource of the former resource allocation when the at least one resource of the former resource allocation may be used by the platoon in the target cell.

4. The network apparatus according to claim 1 , wherein the configuring configures the new resource allocation in at least one platoon member from the one or more platoon members, and the platoon leader in response to the trigger event occurring.

5. The network apparatus according to claim 1 , wherein

the handover request from the platoon leader comprises an identifier of a further cell different from each of the source cell and the target cell; and

the informing informs the further cell on the new resource allocation along with the identifier of the platoon.

6. The network apparatus according to claim 5 , wherein

the informing informs the further cell fully or partly in parallel to the configuring of the platoon leader.

7. The network apparatus according to claim 5 , wherein the at least one processor is configured to execute the computer program code and cause the network apparatus at least to

trigger the source cell and the further cell in response to the trigger event occurring.

8. The network apparatus according to claim 7 , wherein the at least one processor is configured to execute the computer program code and cause the network apparatus at least to

forbid the triggering of the source cell in response to the trigger event occurring at or during a handover of a last platoon member from the platoon from the source cell to the target cell.

9. The network apparatus according to claim 1 , wherein the informing informs the source cell fully or partly in parallel to the configuring of the platoon leader.

10. The network apparatus according to claim 1 , wherein at least one of the handover request from the platoon leader and a message in the handover request from the platoon leader comprises a description of the new resource allocation.

11. A network apparatus, comprising:

at least one memory including computer program code;

at least one processor configured to execute the computer program code and cause the network apparatus at least to,

monitor whether a new resource allocation is received along with an information enabling the network apparatus to identify a platoon;

identify platoon members from the platoon based on the information;

send the new resource allocation to the platoon members in response to identifying the platoon members; and

configure at least one of the platoon members with the new resource allocation in response to a trigger event occurring, the trigger event occurring when a handover request from a dedicated platoon member is received, the dedicated platoon member being different from a platoon leader.

12. The network apparatus according to claim 11 , wherein the configuring configures all the platoon members of the platoon with the new resource allocation in response to the trigger event.

13. The network apparatus according to claim 11 , wherein the at least one processor is configured to execute the computer program code and cause the apparatus at least to

retrieve an identifier of the platoon based on a handover request from the platoon leader requesting a radio handover from a source cell to a target cell; and

add the identifier of the platoon to the handover request before the handover request is forwarded to the target cell.

14. The network apparatus according to claim 11 , wherein the information comprises an identifier of the platoon, an identifier of the platoon leader from the platoon, and a reference to a handover request from the platoon leader, the identifier of the platoon includes at least one of, a position and an identifier of the dedicated platoon member from the platoon members.

15. A method of operating a network apparatus, the method comprising:

monitoring whether a handover request from a platoon leader from a platoon is received from a source cell,

the handover request from the platoon leader requesting a radio handover from the source cell to a target cell,

the platoon including the platoon leader and one or more platoon members, and

the handover request from the platoon leader including an identifier of the platoon, the identifier of the platoon comprising at least one of, a position and an identifier of a dedicated platoon member from the one or more platoon members, the dedicated platoon member being different from the platoon leader;

sending a new resource allocation to the platoon leader after the handover request from the platoon leader is received;

informing the source cell of the new resource allocation along with the identifier of the platoon, an identifier of the platoon leader, and a reference to the handover request from the platoon leader; and

configuring the platoon leader with the new resource allocation in response to a trigger event occurring, the trigger event occurring when a handover request from the dedicated platoon member is received.

16. The method according to claim 15 , comprising:

configuring the platoon leader with the new resource allocation in response to the trigger event occurring, the trigger event occurring based on a negotiation with the source cell.