Slicing of network resources for dual connectivity using NR
Embodiments include methods performed by a first network node configured to operate in a radio access network (RAN). Such methods include determining a radio access technology (RAT)/Frequency Selection Priority (RFSP) index associated with a user equipment (UE) served by the first network node. Such methods include sending, to a second network node, a request for the second network node to establish dual connectivity with the UE as a secondary node (SN). The request includes the RFSP index. Other embodiments include complementary methods performed by the second network node, as well as network nodes configured to perform such methods.
1. A method performed by a first network node configured to operate in a radio access network (RAN), the method comprising:
determining a radio access technology (RAT)/Frequency Selection Priority (RFSP) index associated with a user equipment (UE) served by the first network node;
managing the UE's access to resources of the RAN based on one or more radio resource management (RRM) policies associated with the RFSP index; and
sending, to a second network node, a request for the second network node to establish dual connectivity with the UE as a secondary node (SN), wherein:
the request includes the RFSP index, and
the RFSP index is also associated with one or more further RRM policies, at the second network node, for managing the UE's access to resources of a RAN that includes the second network node.
2. The method of claim 1 , wherein determining the RFSP index comprises receiving the RFSP index from a core network coupled to the RAN.
3. The method of claim 1 , wherein the second network node is configured with a different RAT than the first network node.
4. The method of claim 1 , wherein:
the first network node is configured with Long-Term Evolution (LTE) RAT and the one or more RRM policies are for the LTE RAT; and
the second network node is a next-generation Node B (gNB) configured with New Radio (NR) radio access technology (RAT) and the one or more further RRM policies are for the NR RAT.
5. The method of claim 4 , wherein the one or more further RRM policies for the NR RAT are the same as the one or more RRM policies for the LTE RAT.
6. The method of claim 4 , wherein managing the UE's access to resources of the RAN comprises:
mapping the RFSP index to a particular network slice associated with the LTE RAT; and
scheduling resources of the LTE RAT for UE transmission or reception of data, based on the following associated with the particular network slice:
one or more scheduling parameters, and
a predefined share of the resources of the LTE RAT.
7. A method performed by a second network node configured to operate in a radio access network (RAN), the method comprising:
receiving, from a first network node, a request for the second network node to establish dual connectivity with the UE as a secondary node (SN), wherein the request includes a radio access technology (RAT)/Frequency Selection Priority (RFSP) index associated with the UE, wherein the RFSP index is also associated with one or more further RRM policies, at the first network node, for managing the UE's access to resources of a RAN that includes the first network node;
mapping the RFSP index to one or more further radio resource management (RRM) policies for a RAT that the second network node is configured with; and
managing the UE's access to resources of the RAN based on the one or more further RRM policies.
8. The method of claim 7 , wherein the second network node is configured with a different RAT than the first network node.
9. The method of claim 7 , wherein:
the second network node is a next-generation Node B (gNB) configured with New Radio (NR) RAT and the one or more further RRM policies are for the NR RAT; and
the first network node is configured with Long-Term Evolution (LTE) RAT and the one or more RRM policies are for the LTE RAT.
10. The method of claim 9 , wherein the one or more RRM policies for the NR RAT are the same as one or more further RRM policies for the LTE RAT.
11. The method of claim 9 , wherein managing the UE's access to resources of the RAN comprises:
mapping the RFSP index to a particular network slice associated with the NR RAT; and
scheduling resources of the NR RAT for UE transmission or reception of data, based on the following associated with the particular network slice:
one or more scheduling parameters, and
a predefined share of the resources of the NR RAT.
12. The method of claim 7 , wherein:
the second network node comprises a central unit (CU) and a distributed unit (DU);
the request is received by the CU and forwarded to the DU; and
mapping the RFSP index and managing the UE's access to resources of the RAN are performed by the DU.
13. A first network node configured to operate in a radio access network (RAN), the first network node comprising:
communication interface circuitry configured to communicate with at least a second network node; and
processing circuitry operably coupled to the communication circuitry, whereby the processing circuitry and the communication interface circuitry are configured to:
determine a radio access technology (RAT)/Frequency Selection Priority (RFSP) index associated with a user equipment (UE) served by the first network node;
manage the UE's access to resources of the RAN based on one or more radio resource management (RRM) policies associated with the RFSP index; and
send, to the second network node, a request for the second network node to establish dual connectivity with the UE as a secondary node (SN),
wherein:
the request includes the RFSP index, and
the RFSP index is also associated with one or more further RRM policies, at the second network node, for managing the UE's access to resources of a RAN that includes the second network node.
14. The first network node of claim 13 , wherein the processing circuitry and the communication interface circuitry are configured to determine the RFSP index based on receiving the RFSP index from a core network coupled to the RAN.
15. The first network node of claim 13 , wherein:
the first network node is configured with Long-Term Evolution (LTE) RAT and the one or more RRM policies are for the LTE RAT; and
the second network node is a next-generation Node B (gNB) configured with New Radio (NR) radio access technology (RAT) and the one or more further RRM policies are for the NR RAT.
16. The first network node of claim 13 , wherein the processing circuitry and the communication interface circuitry are configured to manage the UE's access to resources of the RAN based on:
mapping the RFSP index to a particular network slice associated with the LTE RAT; and
scheduling resources of the LTE RAT for UE transmission or reception of data, based on the following associated with the particular network slice:
one or more scheduling parameters, and
a predefined share of the resources of the LTE RAT.
17. A second network node configured to operate in a radio access network (RAN), the second network node comprising:
communication interface circuitry configured to communicate with at least a first network node; and
processing circuitry operably coupled to the communication circuitry, whereby the processing circuitry and the communication interface circuitry are configured to perform operations corresponding to the method of claim 7 .
18. The second network node of claim 17 , wherein:
the second network node is a next-generation Node B (gNB) configured with New Radio (NR) radio access technology (RAT) and the one or more further RRM policies are for the NR RAT; and
the first network node is configured with Long-Term Evolution (LTE) RAT and the one or more RRM policies are for the LTE RAT.