Quality of service differentiation between network slices

1. A method for quality of service differentiation between network slices, the method comprising a prioritization entity:

obtaining relative priority values for the network slices from a network entity;

obtaining information of which one of the network slices the PDU flows belongs to during: setup of a bearer for the PDU flow, setup of tunneling of the bearer, setup of a PDU session, or provisioning of the bearer;

mapping the relative priority value for the network slice to the PDU flow based on the information; and

providing an access network entity with a relative priority value for a protocol data unit (PDU) flow as given by the relative priority value for the network slice used by that PDU flow, thereby causing differentiation of the quality of service for the network slices.

2. The method of claim 1 , wherein the relative priority values are based on network operator policies applicable to those of the network slices that are available.

3. The method of claim 1 , wherein the relative priority values are obtained from the network entity as quality of service information for the network slices.

4. The method of claim 1 , wherein the relative priority value indicates to the access network entity how to prioritize between traffic from different ones of the network slices.

5. The method of claim 1 , wherein each of the network slice is associated with quality of service parameter values used by the network slices in isolation of each other.

6. The method of claim 1 , wherein each network slice represents a dedicated core network.

7. The method of claim 1 , wherein each network slice is represented by a core network slice or a core network instance.

8. The method of claim 1 , wherein the network entity is a network management system or a Policy Control plane Function (PCF) via a Core network Control Function (CCF).

9. A method for quality of service differentiation between network slices, the method comprising an access network entity:

providing service for a protocol data unit (PDU) flow of one of the network slices;

obtaining a relative priority value for the PDU flow from a prioritization entity;

obtaining a quality of service class identifier for the PDU flow; and

prioritizing the PDU flow in relation to other PDU flows for which the access network entity provides service according to the relative priority value and the quality of service class identifier, thereby differentiating the quality of service for the network slices;

wherein the relative priority value is based on information that was obtained during setup of a bearer for the PDU flow, setup of tunneling of the bearer, setup of a PDU session, or provisioning of the bearer, and indicates the PDU flows belongs to the one of the network slices, and the relative priority value for the one of the network slices being mapped to the PDU flow based on the information.

10. The method of claim 9 , wherein the prioritizing is performed during packet forwarding of PDUs in the PDU flow.

11. The method of claim 10 , wherein the prioritizing is performed during admission control of PDUs in the PDU flow.

12. A prioritization entity for quality of service differentiation between network slices, the prioritization entity comprising:

processing circuitry;

memory containing instructions executable by the processing circuitry whereby the prioritization entity is operative to:

obtain relative priority values for the network slices from a network entity;

obtain information of which one of the network slices the PDU flows belongs to during: setup of a bearer for the PDU flow, setup of tunneling of the bearer, setup of a PDU session, or provisioning of the bearer;

map the relative priority value for the network slice to the PDU flow based on the information; and

provide an access network entity with a relative priority value for a protocol data unit (PDU) flow as given by the relative priority value for the network slice used by that PDU flow, thereby causing differentiation of the quality of service for the network slices.

13. An access network entity for quality of service differentiation between network slices, the access network entity comprising:

processing circuitry;

memory containing instructions executable by the processing circuitry whereby the access network entity is operative to:

provide service for a protocol data unit (PDU) flow of one of the network slices;

obtain a relative priority value for the PDU flow from a prioritization entity;

obtain a quality of service class identifier for the PDU flow; and

prioritize the PDU flow in relation to other PDU flows for which the access network entity provides service according to the relative priority value and the quality of service class identifier, thereby differentiating the quality of service for the network slices;

wherein the relative priority value is based on information that was obtained during setup of a bearer for the PDU flow, setup of tunneling of the bearer, setup of a PDU session, or provisioning of the bearer, and indicates the PDU flows belongs to the one of the network slices, and the relative priority value for the one of the network slices being mapped to the PDU flow based on the information.