Radio access capabilities of a wireless device

1 . A method performed by a radio network node in a wireless communication network, the method comprising:

acquiring, from a wireless device, radio access capability information of the wireless device, wherein the radio access capability information indicates radio access capabilities of the wireless device;

making a determination as to whether or not to forward the radio access capability information from the radio network node to a core network node in the wireless communication network, based on whether the radio network node received the radio access capability information before or after access stratum security was activated for the wireless device, wherein the determination is to:

forward the radio access capability information if the radio network node received the radio access capability information after access stratum security was activated for the wireless device; or

refrain from forwarding the radio access capability information if the radio network node received the radio access capability information before access stratum security was activated for the wireless device; and

forwarding, or refraining from forwarding, the radio access capability information from the radio network node to the core network node according to the determination.

2 . The method of claim 1 , further comprising:

making a storage determination as to whether or not to store the radio access capability information at the radio network node, wherein the storage determination is to:

store the radio access capability information at the radio network node if the radio network node received the radio access capability information after access stratum security was activated for the wireless device; or

refrain from storing the radio access capability information at the radio network node if the radio network node received the radio access capability information before access stratum security was activated for the wireless device; and

storing, or refraining from storing, the radio access capability information at the radio network node according to the storage determination.

3 . The method of claim 1 , wherein the wireless device is a user equipment (UE), and wherein the radio access capability information is acquired using a radio resource control (RRC) UE capability transfer procedure in which the radio network node receives the radio access capability information from the wireless device in response to transmitting a capability enquiry to the wireless device.

4 . The method of claim 3 , wherein the determination is to:

forward the radio access capability information if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure after access stratum security was activated for the wireless device; or

refrain from forwarding the radio access capability information if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure before access stratum security was activated for the wireless device.

5 . The method of claim 3 , wherein an access stratum Security Mode Command (SMC) procedure is a procedure that, if performed successfully, activates access stratum security for the wireless device, and wherein the determination is to:

forward the radio access capability information if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure after performing a successful access stratum SMC procedure for the wireless device; or

refrain from forwarding the radio access capability information if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure before performing a successful access stratum SMC procedure for the wireless device.

6 . The method of claim 5 , further comprising, if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure before performing a successful access stratum SMC procedure for the wireless device:

after acquiring the radio access capability information, performing a successful access stratum SMC procedure for the wireless device; and

after performing a successful access stratum SMC procedure for the wireless device, re-acquiring the radio access capability information for the wireless device by re-running the RRC UE capability transfer procedure for the wireless device.

7 . The method of claim 1 , wherein the received radio access capability information indicates the radio access capabilities of the wireless device for each of one or more radio access technologies.

8 . The method of claim 1 , wherein the radio network node is a New Radio node B (gNB), a Next Generation Evolved Node B (ng-eNB), or an Evolved Node B (eNB).

9 . A radio network node configured for use in a wireless communication network, the radio network node comprising:

communication circuitry; and

processing circuitry configured to:

acquire, from a wireless device, radio access capability information of the wireless device, wherein the radio access capability information indicates radio access capabilities of the wireless device;

make a determination as to whether or not to forward the radio access capability information from the radio network node to a core network node in the wireless communication network, based on whether the radio network node received the radio access capability information before or after access stratum security was activated for the wireless device, wherein:

the processing circuitry is configured to make the determination to forward the radio access capability information if the radio network node received the radio access capability information after access stratum security was activated for the wireless device; and

the processing circuitry is configured to make the determination to refrain from forwarding the radio access capability information if the radio network node received the radio access capability information before access stratum security was activated for the wireless device; and

forward, or refrain from forwarding, the radio access capability information from the radio network node to the core network node according to the determination.

10 . The radio network node of claim 9 , wherein the processing circuitry is further configured to:

make a storage determination as to whether or not to store the radio access capability information at the radio network node, based on whether the radio network node received the radio access capability information before or after access stratum security was activated for the wireless device, wherein:

the processing circuitry is configured to make the storage determination to store the radio access capability information at the radio network node if the radio network node received the radio access capability information after access stratum security was activated for the wireless device; or

the processing circuitry is configured to make the storage determination to refrain from storing the radio access capability information at the radio network node if the radio network node received the radio access capability information before access stratum security was activated for the wireless device; and

store, or refrain from storing, the radio access capability information at the radio network node according to the storage determination.

11 . The radio network node of claim 9 , wherein the wireless device is a user equipment (UE), and wherein the radio access capability information is acquired using a radio resource control (RRC) UE capability transfer procedure in which the radio network node receives the radio access capability information from the wireless device in response to transmitting a capability enquiry to the wireless device.

12 . The radio network node of claim 11 , wherein the determination is to:

forward the radio access capability information if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure after access stratum security was activated for the wireless device; or

refrain from forwarding the radio access capability information if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure before access stratum security was activated for the wireless device.

13 . The radio network node of claim 11 , wherein an access stratum Security Mode Command (SMC) procedure is a procedure that, if performed successfully, activates access stratum security for the wireless device, and wherein the determination is to:

forward the radio access capability information if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure after performing a successful access stratum SMC procedure for the wireless device; or

refrain from forwarding the radio access capability information if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure before performing a successful access stratum SMC procedure for the wireless device.

14 . The radio network node of claim 13 , wherein the processing circuitry is further configured to, if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure before performing a successful access stratum SMC procedure for the wireless device:

after acquiring the radio access capability information, perform a successful access stratum SMC procedure for the wireless device; and

after performing a successful access stratum SMC procedure for the wireless device, re-acquire the radio access capability information for the wireless device by re-running the RRC UE capability transfer procedure for the wireless device.

15 . The radio network node of claim 9 , wherein the received radio access capability information indicates the radio access capabilities of the wireless device for each of one or more radio access technologies.

16 . The radio network node of claim 9 , wherein the radio network node is a New Radio node B (gNB), a Next Generation Evolved Node B (ng-eNB), or an Evolved Node B (eNB).

17 . A non-transitory computer-readable medium on which is stored instructions which, when executed by at least one processor of a radio network node of a wireless communication network, cause the radio network node to:

acquire, from a wireless device, radio access capability information of the wireless device, wherein the radio access capability information indicates radio access capabilities of the wireless device;

make a determination as to whether or not to forward the radio access capability information from the radio network node to a core network node in the wireless communication network, based on whether the radio network node received the radio access capability information before or after access stratum security was activated for the wireless device, wherein:

the instructions cause the radio network node to forward the radio access capability information if the radio network node received the radio access capability information after access stratum security was activated for the wireless device; and

the instructions cause the radio network node to refrain from forwarding the radio access capability information if the radio network node received the radio access capability information before access stratum security was activated for the wireless device; and

forward, or refrain from forwarding, the radio access capability information from the radio network node to the core network node according to the determination.

18 . The non-transitory computer-readable medium of claim 17 , wherein the instructions, when executed by the at least one processor of the radio network node, further cause the radio network node:

make a storage determination as to whether or not to store the radio access capability information at the radio network node, based on whether the radio network node received the radio access capability information before or after access stratum security was activated for the wireless device, wherein:

the instructions cause the radio network node to store the radio access capability information at the radio network node if the radio network node received the radio access capability information after access stratum security was activated for the wireless device; and

the instructions cause the radio network node to refrain from storing the radio access capability information at the radio network node if the radio network node received the radio access capability information before access stratum security was activated for the wireless device; and

store, or refrain from storing, the radio access capability information at the radio network node according to the storage determination.

19 . The non-transitory computer-readable medium of claim 17 , wherein the wireless device is a user equipment (UE), and wherein the instructions, when executed by the at least one processor of the radio network node, cause the radio network node to acquire the radio access capability information using a radio resource control (RRC) UE capability transfer procedure in which the radio network node receives the radio access capability information from the wireless device in response to transmitting a capability enquiry to the wireless device.

20 . The non-transitory computer-readable medium of claim 19 , wherein:

the instructions cause the radio network node to forward the radio access capability information if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure after access stratum security was activated for the wireless device; and

the instructions cause the radio network node to refrain from forwarding the radio access capability information if the radio network node acquired the radio access capability information using the RRC UE capability transfer procedure before access stratum security was activated for the wireless device.

21 . The method of claim 1 , wherein making the determination comprises making the determination to refrain from forwarding the radio access capability information, based on the radio network node having received the radio access capability information before access stratum security was activated for the wireless device, and wherein said forwarding or refraining comprises refraining from forwarding the radio access capability information from the radio network node to the core network node according to the determination.

22 . The method of claim 21 , further comprising, after said refraining:

acquiring, from the wireless device, further radio access capability information of the wireless device, wherein the further radio access capability information indicates radio access capabilities of the wireless device;

making a further determination as to whether or not to forward the further radio access capability information from the radio network node to the core network node in the wireless communication network, based on whether the radio network node received the further radio access capability information before or after access stratum security was activated for the wireless device, wherein the further determination is to forward the further radio access capability information based on the radio network node having received the further radio access capability information after access stratum security was activated for the wireless device; and

forwarding the further radio access capability information from the radio network node to the core network node according to the further determination.