Methods, apparatus, and systems for minimizing service interruptions (MINIIZATION OF SERVICE INTERRUPTIONS, MINT)

Abstract

This document discloses a method implemented by a Wireless Transmitter / Receiver Unit (WTRU). [Solution] In one embodiment, a method implemented by a wireless transmit / receive unit (WTRU) registered with a first network includes receiving information from the first network indicating values ​​to be used during registration with a second network, and determining at least a first start time and a second start time for performing registration with the second network, based at least on the indicated values. The method further includes starting registration with the second network after the first start time, and, on the condition that registration is not completed within a defined period after the first start time, (1) stopping registration with the second network, and (2) starting a second registration or re-registration of the WTRU with the second network after the second start time.

Claims

1. A method implemented by a wireless transmit / receive unit (WTRU) registered in a first network, Receiving information from the first network indicating the value used during registration to the second network, Based on the values ​​indicated above, determine at least a first start time and a second start time for performing the registration to the second network, The registration to the second network begins after the first start time, On the condition that the registration is not completed within the defined period after the first start time, (1) Stop the registration to the second network, (2) A method comprising: initiating a second registration or re-registration of the WTRU to the second network after the second start time.

2. The received information indicating the aforementioned value further indicates a time window, The defined period is based on the duration of the time window, The method according to claim 1, further comprising determining the time window based on (i) the indicated value and (ii) a random value or one or more parameters specific to the WTRU, based on (1) the first start time and (2) the end time or the duration of the time window.

3. The method according to claim 1 or 2, wherein the received information further indicates the identifier of the WTRU.

4. The WTRU, when the first network is unreachable by the second network, roams to the second network as a disaster Roma. The method according to any one of claims 1 to 3, wherein the received information further indicates a second value used to determine when the WTRU is permitted to access the first network or any further network to which the WTRU is registered before the first network or any further network.

5. The method according to any one of claims 1 to 4, further comprising transmitting or receiving data transmissions over the second network, provided that (1) the registration is completed within the defined period, or (2) the second registration or re-registration is completed after the second start time.

6. The method according to any one of claims 1 to 5, further comprising determining that the registration is not complete based on either (1) receiving a registration rejection message from a network entity containing information indicating that the registration has been rejected, or (2) not receiving a registration acceptance message within the defined period.

7. The method according to any one of claims 1 to 6, further comprising receiving information from the WTRU indicating a second value used to determine when the WTRU is permitted to register or re-register with the first network after the disaster condition is no longer applicable to the first network.

8. The method according to any one of claims 1 to 7, wherein initiating any of the registrations (1) the registration, (2) the second registration, or (3) the re-registration is performed by the WTRU, which sends a registration request message to a network entity of the second network for providing services to the WTRU, the message includes (1) an incident identifier, (2) an identifier of the first network, and information indicating any of the following: (i) a location associated with the WTRU, (ii) a disaster or coverage area associated with the WTRU, (iii) one or more tracking areas associated with the WTRU, and / or (iv) the last visited tracking area of ​​the WTRU.

9. Provided that the WTRU supports Minimize Service Interruption (MINT) operation, The WTRU determines whether it has changed the coverage area from a first TA associated with the received tracking area (TA) list to a second TA associated with the received TA list. The WTRU sends a non-access layer message to the network entity of the first network indicating that it has changed the coverage area from the first TA to the second TA. The WTRU receives instructions to re-register with the second network to which it was previously registered, and The method according to any one of claims 1 to 8, further comprising configuring the WTRU to re-register with the second network by the WTRU.

10. The WTRU transmits information indicating a disaster roaming instruction by the WTRU during disaster conditions, The method according to any one of claims 1 to 9, further comprising: the WTRU receiving a message to initiate authentication of the WTRU based at least on the disaster roaming instruction.

11. Receiving information indicating the value used during registration to the second network includes receiving configuration information from a first network entity associated with the first network indicating one or more disaster response incident identifiers (DRIDs) associated with one or more disaster responses, and the method is The WTRU receives broadcast information from the second network entity of the second network indicating one or more authorized DRIDs or a portion thereof, The WTRU selects a DRID from the indicated DRIDs that matches one or more permitted DRIDs or a portion thereof, The WTRU transmits a registration request message to the second network entity, which includes information indicating the selected DRID or a portion of the selected DRID. The method according to any one of claims 1 to 10, further comprising the WTRU receiving a registration acceptance message from the second network entity, provided that the WTRU is located within a portion of the second network.

12. The selected DRID includes an area identifier (AID) corresponding to a disaster response serving area used for registration during disaster conditions associated with the first network as part of the second network, The method according to claim 11, wherein the WTRU is located within the disaster response serving area of ​​the second network when the WTRU is located within any of the following: (1) within one or more specific tracking areas of the second network; (2) within one or more specific cells of the second network; (3) near one or more specific radio access network (RAN) nodes of the second network; (4) within a specific coverage area of ​​the second network; (5) within the entire coverage area of ​​the second network; or (6) near any RAN node of the second network.

13. The method according to claim 11, wherein each DRID includes a disaster recovery code (DRC) such that the selection of the DRID from among the indicated DRIDs is based on a match between one of the DRCs in the indicated DRID and one of the DRCs of the one or more permitted DRIDs.

14. Under the condition that the WTRU is not registered with the first network before the first network experiences the disaster conditions, The WTRU selects a default or predetermined disaster response incident identifier (DRID) for registration with the second network, The WTRU transmits a registration request message to the second network entity, which includes information indicating the selected DRID or a portion of the selected DRID. The method according to any one of claims 1 to 13, further comprising the WTRU receiving a registration acceptance message from a second network entity, provided that the WTRU is located within a portion of the second network.

15. The method according to any one of claims 1 to 14, wherein the suspension of the registration to the second network includes ignoring the received registration acceptance message or not acting on the received registration acceptance message, provided that the registration acceptance message is received during the period after the defined period has been completed and before the second start time.

16. A wireless transmit / receive unit (WTRU) registered with the first network, A transmitter / receiver unit configured to receive information indicating values ​​used during registration from the first network to the second network, A processor is provided, and the processor is Based on at least the values ​​indicated above, determine at least a first start time and a second start time for performing the registration to the second network, The registration to the second network is initiated after the first start time, and On the condition that the registration is not completed within the defined period after the first start time, (1) Stop the registration to the second network, (2) A WTRU configured to begin a second registration or re-registration of the WTRU to the second network after the second start time.

17. The received information indicating the aforementioned value further indicates a time window, The WTRU according to claim 16, wherein the defined period is based on the duration of the time window. The processor is configured to determine the time window based on (i) the indicated value and (ii) a random value or one or more parameters specific to the WTRU, based on (1) the first start time and (2) the end time or the duration of the first time window.

18. The WTRU according to claim 16 or 17, wherein the received information further indicates an identifier for the WTRU.

19. The WTRU is configured to roam to the second network as a disaster roamer when the first network is unreachable by the second network. The WTRU according to any one of claims 16 to 18, wherein the received information further indicates a second value used to determine when the WTRU is permitted to access the first network or any further network to which the WTRU is registered before the first network or any further network.

20. The WTRU according to any one of claims 16 to 19, wherein the transmitter / receiver unit is configured to transmit or receive data transmissions over the second network, provided that (1) the registration is completed during the defined period, or (2) the second registration or re-registration is completed after the second start time.

21. The WTRU according to any one of claims 16 to 20, wherein the processor is configured to determine that the registration is not complete based on either (1) a registration rejection message being received from a network entity, which includes information indicating that the registration has been rejected, or (2) a registration acceptance message not being received within the defined period.

22. The WTRU according to any one of claims 16 to 21, wherein the transmitter / receiver unit is configured to receive information indicating a second value used to determine when the WTRU is permitted to register or re-register with the first network after the disaster conditions no longer apply to the first network.

23. A WTRU according to any one of claims 16 to 22, wherein the transmitter / receiver unit is configured to send a registration request message to a network entity of the second network for providing services to the WTRU, the message includes (1) an incident identifier, (2) an identifier of the first network, and information indicating any of the following: (i) a location associated with the WTRU, (ii) a disaster or coverage area associated with the WTRU, (iii) one or more tracking areas associated with the WTRU, and / or (iv) the last visited tracking area of ​​the WTRU.

24. Provided that the WTRU supports Minimize Service Interruption (MINT) operation, The processor is configured to determine whether the WTRU has changed the coverage area from a first TA associated with the received tracking area (TA) list to a second TA associated with the received TA list. The transmitter / receiver unit, The WTRU sends a non-access layer message to the network entity of the first network indicating that it has changed the coverage area from the first TA to the second TA, and The WTRU is configured to receive instructions to re-register with the second network that it was previously registered with. The WTRU according to any one of claims 16 to 23, wherein the processor is configured to re-register with the second network by the WTRU.

25. The transmitter / receiver unit, During disaster conditions, information indicating a disaster roaming instruction by the WTRU is transmitted, and A WTRU according to any one of claims 16 to 24, configured to receive a message to initiate authentication of the WTRU based at least on the disaster roaming instruction.

26. The transmitter / receiver unit, Configuration information indicating one or more disaster response incident identifiers (DRIDs) associated with one or more disaster responses is received from a first network entity associated with the first network, and It is configured to receive broadcast information indicating one or more authorized DRIDs or a portion thereof from a second network entity of the second network, The processor is configured to select a DRID from the indicated DRIDs that matches one or more permitted DRIDs or a portion thereof. The transmitter / receiver unit, A registration request message is sent to the second network entity, which includes information indicating the selected DRID or a portion of the selected DRID, and A WTRU according to any one of claims 16 to 24, configured to receive a registration acceptance message from the second network entity, provided that the WTRU is located within a portion of the second network.

27. The selected DRID includes an area identifier (AID) corresponding to a disaster response serving area used for registration in disaster conditions associated with the first network as part of the second network, The WTRU according to claim 26, wherein the WTRU is located within the disaster response serving area of ​​the second network when the WTRU is located in any of the following: (1) within one or more specific tracking areas of the second network; (2) within one or more specific cells of the second network; (3) in the vicinity of one or more specific radio access network (RAN) nodes of the second network; (4) within a specific coverage area of ​​the second network; (5) within the entire coverage area of ​​the second network; and / or (6) in the vicinity of any RAN node of the second network.

28. The WTRU according to claim 26 or 27, wherein each DRID includes a disaster recovery code (DRC), and the processor is configured to select the DRID from the indicated DRIDs based on a match between one of the DRCs in the indicated DRIDs and one of the DRCs in the one or more permitted DRIDs.

29. The processor is configured to select a default or predetermined disaster response incident identifier (DRID) to register with the second network, provided that the WTRU is not registered with the first network before the first network experiences disaster conditions. The transmitter / receiver unit, A registration request message is sent to the second network entity, which includes information indicating the selected DRID or a portion of the selected DRID, and A WTRU according to any one of claims 16 to 28, configured to receive a registration acceptance message from the second network entity, provided that the WTRU is located within a portion of the second network.

30. The WTRU according to any one of claims 16 to 29, wherein the processor is configured to ignore the received registration acceptance message or not act on the received registration acceptance message, provided that the received registration acceptance message is received after the defined period has ended and before the second start time.

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