Communication system

1. An apparatus in a network repository function, comprising:

at least one processor; and

at least one memory including computer program code;

the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to perform:

receiving, during one of a network function registration process and a network function update process, information for an access and mobility management function, wherein said information is received during one of a network function registration process and a network function update process; and

causing at least a part of said information for said access and mobility management function to be stored at a domain name server.

2. The apparatus as claimed in claim 1 , wherein said information comprises address information for an interface of said access and mobility management function towards an access network.

3. The apparatus as claimed in claim 2 , wherein said address information comprises one or more IP addresses.

4. The apparatus as claimed in claim 1 , wherein said at least one memory and computer program code are configured, with said at least one processor, to cause the apparatus to further perform causing information on a set of access and mobility management functions to be provided to said domain name server such that said domain name server has information on available access and mobility management functions of said set.

5. The apparatus as claimed in claim 1 , wherein said information is received in a message from said access and mobility management function.

6. The apparatus as claimed in claim 1 , wherein said information is provided as part of profile information of said access and mobility management function.

7. An apparatus in an access and mobility management function, comprising:

at least one processor; and

at least one memory including computer program code;

the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to perform:

causing information for said access and mobility management function to be transmitted to a network repository function, said information comprising address information of an interface of said access and mobility management function, said interface being towards an access network, and name information of said access and mobility management function, wherein said address information comprises at least two IP addresses.

8. The apparatus as claimed in claim 7 , wherein said information is provided during one of a network function registration process, a network function de-registration process and a network function update process.

9. The apparatus as claimed in claim 7 , wherein said information is provided as part of profile information of said access and mobility management function.

10. An apparatus in an access network, comprising:

at least one processor; and

at least one memory including computer program code;

the at least one memory and the computer program code being configured to, with the at least one processor, cause the apparatus at least to perform:

causing a request to be sent to a domain name server for address information for a plurality of access and mobility management functions, said address information being for respective interfaces of respective access and mobility management functions, each interface being towards said access network; and

receiving a response with said address information associated with a plurality of access and mobility management functions.

11. The apparatus as claimed in claim 10 , wherein:

said plurality of access and mobility management functions comprises a set of access and mobility management functions, and

said at least one memory and computer program code are configured, with said at least one processor, to cause the apparatus to further perform determining said set of access and mobility management functions.

12. The apparatus as claimed in claim 10 , wherein said request is for initiating a straight forward name authority pointer procedure for said set of access and mobility management functions.

13. The apparatus as claimed in claim 12 , wherein said response comprises name authority pointer records comprising said address information for respective access and mobility management functions of said set.

14. The apparatus as claimed in claim 12 , wherein said response comprises name authority pointer records comprising said address information for respective access and mobility management functions which are currently available in said set.

15. The apparatus as claimed in claim 10 , wherein said at least one memory and computer program code are configured, with said at least one processor, to cause the apparatus to further perform selecting an access and mobility management function from said plurality of an access and mobility management function for which address information is received.

16. A method, comprising:

receiving, during one of a network function registration process and a network function update process, information in a network repository function for an access and mobility management function, wherein said information is received during one of a network function registration process and a network function update process; and

causing, by said network repository function, at least a part of said information for said access and mobility management function to be stored at a domain name server.

17. A method, comprising:

causing, in an access and mobility management function, information for said access and mobility management function to be transmitted to a network repository function, said information comprising address information of an interface of said access and mobility management function, said interface being towards an access network wherein said address information comprises at least two IP addresses.

18. A method, comprising:

causing, in an access network, a request to be sent to a domain name server for address information for a plurality access and mobility management functions, said address information being for respective interfaces of respective access and mobility management functions, each interface being towards said access network; and

receiving a response with said address information associated with a plurality of access and mobility management functions.

19. A computer program embodied on a non-transitory computer-readable medium, said computer program comprising computer executable code which, when executed in hardware causes the hardware to perform the method of claim 16 .