Method, apparatus and computer program related to secondary cell group reactivation in multi-radio access technology-dual connectivity

1. A method comprising, at a user equipment operating in connection with a first network configured to operate using a first radio access technology and a second network configured to operate using a second radio access technology:

determining that communication between the user equipment and the second network using the second radio access technology is to be suspended;

in response to the determining, suspending communication between the user equipment and the second network using the second radio access technology and storing a configuration relating to the second radio access technology,

wherein communication between the user equipment and the second network using the second radio access technology can be reactivated via at least one of the first network and the second network using the stored configuration relating to the second radio access technology,

wherein the user equipment is operating using dual connectivity,

wherein the user equipment continues communication with the first network using the first radio access technology, and

wherein the first network comprises master cell groups and the second network comprises secondary cell groups.

2. The method according to claim 1 , wherein the determining comprises receiving an indication from the first network or the second network to suspend communication between the user equipment and the second network using the second radio access technology and to store the configuration relating to the second radio access technology.

3. The method according to claim 1 , comprising changing the configuration relating to the second radio access technology based on at least one event.

4. The method according to claim 3 , comprising receiving information from the first network or the second network, said information comprising an indication to change how the configuration relating to the second radio access technology changes based on the at least one event.

5. The method according to claim 1 , comprising:

reactivating communication between the user equipment and the second network using the second radio access technology based on detecting at least one event.

6. The method according to claim 1 , comprising:

receiving an indication from at least one of the network and the second network to reactivate communication between the user equipment and the second network using the second radio access technology; and

reactivating communication between the user equipment and the second network using the second radio access technology in response to the received indication.

7. The method according to claim 1 , wherein reactivating communication between the user equipment and the second network using the second radio access technology comprises performing a random access procedure with an access point of the second network.

8. The method according to claim 7 , comprising:

providing an indication to the user equipment to reactivate communication between the user equipment and the second network using the second radio access technology.

9. A method comprising, at a node of a first network using a first radio access technology or a second network using a second radio access technology:

determining that communication using the second radio access technology at a user equipment operating in connection with the first network and the second network is to be suspended; and

in response to the determining, providing an indication to the user equipment to suspend communication between the user equipment and the second network using the second radio access technology and storing a configuration relating to the second radio access technology,

wherein communication using the second radio access technology can be reactivated via at least one of the first network and the second network using the stored configuration relating to the second radio access technology,

wherein the user equipment is operating using dual connectivity,

wherein the user equipment continues communication with the first network using the first radio access technology, and

wherein the first comprises master cell groups and the second network comprises secondary cell groups.

10. The method according to claim 9 , comprising providing information to the user equipment, said information comprising an indication to change how the configuration relating to the second radio access technology changes based on at least one event.

11. An apparatus comprising:

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

at a user equipment operating in connection with a first network using a first radio access technology and a second network using a second radio access technology, determine that communication between the user equipment and the second network using the second radio access technology is to be suspended;

in response to the determining, suspend communication between the user equipment and the second network using the second radio access technology and store a configuration relating to the second radio access technology,

wherein communication between the user equipment and the second network using the second radio access technology can be reactivated via at least one of the first network and the second network using the stored configuration relating to the second radio access technology,

wherein the user equipment is configured to operate using dual connectivity,

wherein the user equipment continues communication with the first network using the first radio access technology, and

wherein the first network comprises master cell groups and the second network comprises secondary cell groups.

12. The apparatus according to claim 11 , wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

receive an indication from the first network or the second network to suspend communication between the user equipment and the second network using the second radio access technology and to store the configuration relating to the second radio access technology.

13. The apparatus according to claim 11 , wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

change the configuration relating to the second radio access technology based on at least one event.

14. The apparatus according to claim 13 , wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

receive information from the first network or the second network, said information comprising an indication to change how the configuration relating to the second radio access technology changes based on the at least one event.

15. The apparatus according to claim 11 , wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

reactivate communication between the user equipment and the second network using the second radio access technology based on detecting at least one event.

16. The apparatus according to claim 11 , wherein the at least one memory and the computer program code configured to, with the at least one processor, cause the apparatus at least to:

receive an indication from at least one of the first network and the second network to reactivate communication between the user equipment and the second network using the second radio access technology; and

reactivate communication between the user equipment and the second network using the second radio access technology in response to the received indication.

17. The apparatus according to claim 11 , wherein the communication between the user equipment and the second network using the second radio access technology is reactivated by performing a random access procedure with an access point of the second network.