Communication method, core network node, and wireless device
It is intended to solve or at least reduce such a problem that a UE cannot know that a network is abnormal. A wireless terminal in an aspect of the present disclosure includes: a communication unit ( 11 ) configured to receive a registration permission message including at least one piece of information indicating that the procedure of first network slice-specific authentication and authorization is pending; and a control unit ( 12 ) configured to activate, upon the reception of the registration permission message, a timer for determining that the procedure of network slice-specific authentication and authorization is abnormal.
1. A communication method performed by a core network node, the communication method comprising:
receiving, from a wireless terminal, a registration request message including a first single network slice selection assistance information (S-NSSAI);
starting a timer for the first S-NSSAI;
considering that the NSSAA procedure for a first S-NSSAI is completed as a failure in a case where the timer for the first S-NSSAI; and
transmitting a non-access stratum (NAS) message to the wireless terminal,
wherein the NAS message includes the first S-NSSAI and a reject cause in a rejected NSSAI, in a case where the NSSAA procedure is considered as the failure.
2. The communication method according to claim 1 , wherein the NAS message including the rejected NSSAI including the first S-NSSAI and the cause value is a de-registration request message.
3. The communication method according to claim 1 , wherein the NAS message including the rejected NSSAI including the first S-NSSAI and the cause value is a configuration update command message.
4. The communication method according to claim 1 , further comprising transmitting, to the wireless terminal, a registration accept message including the certain S-NSSAI associated with a pending status, wherein the pending status indicates that the NSSAA for the certain S-NSSAI is performed.
5. The communication method according to claim 4 , wherein the NSSAA for the certain S-NSSAI is executed after the registration accept message is transmitted.
6. The communication method according to claim 4 , wherein the registration accept message includes an empty allowed NSSAI when the at least one piece of S-NSSAI included in requested NSSAI is each continuously a target of the NSSAA.
7. The communication method according to claim 1 , further comprising storing a status of the NSSAA for the certain S-NSSAI in a UE context of the wireless terminal, wherein the status of the NSSAA for the certain S-NSSAI is any of “success”, “failure”, and “pending”.
8. The communication method according to claim 1 , wherein the NAS message including the rejected NSSAI including the first S-NSSAI and the cause value is a registration accept message, and
wherein the registration accept message is transmitted based on the first S-NSSAI included in requested NSSAI transmitted to another core network node by the wireless terminal, after the NSSAA for the first S-NSSAI by the other core network node is completed as failure.
9. A communication method performed by a wireless terminal, the communication method comprising:
transmitting, to a core network node, a registration request message including a first single network slice selection assistance information (S-NSSAI); and
receiving a non-access stratum (NAS) message from the core network node, after a network slice-specific authentication and authorization (NSSAA) procedure for the first S-NSSAI is considered as a failure in a case where a timer for the first S-NSSAI expires,
wherein the NAS message includes the first S-NSSAI and a reject cause in a rejected NSSAI, in a case where the NSSAA procedure is considered as the failure.
10. The communication method according to claim 9 , wherein the NAS message including the rejected NSSAI including the first S-NSSAI and the cause value is a de-registration request message.
11. The communication method according to claim 9 , wherein the NAS message including the rejected NSSAI including the first S-NSSAI and the cause value is a configuration update command message.
12. The communication method according to claim 9 , further comprising receiving, from the core network node, a registration accept message including the certain S-NSSAI associated with a pending status, wherein the pending status indicates that the NSSAA for the certain S-NSSAI is performed.
13. The communication method according to claim 12 , wherein the NSSAA for the certain S-NSSAI is executed after the registration accept message is received.
14. The communication method according to claim 12 , wherein the registration accept message includes an empty allowed NSSAI when the at least one piece of S-NSSAI included in requested NSSAI is each continuously a target of the NSSAA.
15. The communication method according to claim 9 , further comprising storing a status of the NSSAA for the certain S-NSSAI in a UE context of the wireless terminal, wherein the status of the NSSAA for the certain S-NSSAI is any of “success”, “failure”, and “pending”.
16. The communication method according to claim 9 , further comprising:
storing rejected NSSAI including the first S-NSSAI and the cause value; and
not using the first S-NSSAI included in the stored requested NSSAI until the wireless terminal is powered off or a UICC including a USIM is removed.
17. The communication method according to claim 9 , wherein
the NAS message including the rejected NSSAI including the first S-NSSAI and the cause value is a registration accept message, and
the registration accept message is received based on the first S-NSSAI included in requested NSSAI transmitted to another core network node by the wireless terminal, after the NSSAA for the first S-NSSAI by the other core network node is completed as failure.
18. A core network node comprising:
at least one memory storing instructions, and
at least one processor configured to execute the instructions to;
receive, from a wireless terminal, a registration request message including a first single network slice selection assistance information (S-NSSAI);
start a timer for the first S-NSSAI;
consider that the NSSAA procedure for a first S-NSSAI is completed as a failure in a case where the timer for the first S-NSSAI expires; and
transmit a non-access stratum (NAS) message to the wireless terminal,
wherein the NAS message includes the first S-NSSAI and a reject cause in a rejected NSSAI, in a case where the NSSAA procedure is considered as the failure.
19. A wireless terminal comprising:
at least one memory storing instructions, and
at least one processor configured to execute the instructions to:
transmit, to a core network node, a registration request message including a first single network slice selection assistance information (S-NSSAI); and
receive a non-access stratum (NAS) message from the core network node, after a network slice-specific authentication and authorization (NSSAA) procedure for the first S-NSSAI is considered as a failure in a case where a timer for the first S-NSSAI expires,
wherein the NAS message includes the first S-NSSAI and a reject cause in a rejected NSSAI, in a case where the NSSAA procedure is considered as the failure.
20. The communication method according to claim 1 , wherein the reject cause indicates that the first S-NSSAI is not available due to the failure of the NSSAA.
21. The communication method according to claim 9 , wherein the reject cause indicates that the first S-NSSAI is not available due to the failure of the NSSAA.
22. The communication method according to claim 18 , wherein the reject cause indicates that the first S-NSSAI is not available due to the failure of the NSSAA.
23. The communication method according to claim 19 , wherein the reject cause indicates that the first S-NSSAI is not available due to the failure of the NSSAA.