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1. WO2020013749 - SEGMENTATION DE MESSAGE PWS ET INFORMATIONS DE ZONE ASSOCIÉES

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CLAIMS

What is claimed is:

1. A method, in at least one network node of a wireless communication system serving a plurality of user equipments, UEs, the method comprising:

obtaining (302) a message to be transmitted as a public warning system notification to multiple UEs, via one or more system information blocks;

obtaining (304) area information corresponding to the message, the area information indicating an area for which the message is relevant;

determining (306) how many system information blocks are needed for transmitting the area information;

segmenting (308) the message into a plurality of segments, based on how many

system information blocks are needed for transmitting the area information; and

transmitting (310) the message and the area information via system information

blocks, such that no more than one segment of the message is included in any of the transmitted system information blocks and such that each portion of the area information included in a transmitted system information block is accompanied by a segment of the message.

2. The method of claim 1, wherein segmenting (308) the message comprises dividing the message into at least N segments, where N is the number of system information blocks needed for transmitting the area information.

3. The method of claim 2, wherein segmenting (308) the message comprises dividing the message into exactly N segments.

4. The method of claim 1, wherein segmenting (308) the message comprises:

determining that the message, without modification, cannot be divided into enough segments so that each portion of the area information included in a system information block is accompanied by a segment; and

extending the message, prior to said segmenting, so that the extended message can be divided into enough segments so that each portion of the area information included in a system information block is accompanied by a segment.

5. The method of any of claims 1-4, wherein the message is a container carrying notification information coded into the container.

6. The method of claim 5, wherein the container is an ASN-l container.

7. The method of any of claims 1-6, wherein the system information blocks are LTE

SystemlnformationBlockTypel 1 blocks or LTE SystemInformationBlockTypel2 blocks.

8. A method, in at least one network node of a wireless communication system serving a plurality of user equipments, EIEs, the method comprising:

obtaining (502) a message to be transmitted as a public warning system notification to multiple EIEs, via one or more system information blocks;

obtaining (504) area information corresponding to the message, the area information indicating an area for which the message is relevant;

transmitting (506) at least some of the message via a first system information block; and

transmitting (508) at least some of the area information via a second system

information block, such that the second system information block contains linking information indicating that the included area information corresponds to the message sent via the first system information block.

9. The method of claim 8, wherein the linking information comprises a message identifier or a serial number, or both, corresponding to an identical identifier or serial number, or both, in the first system information block.

10. The method of claim 8 or 9, wherein the first system information block is a

SystemlnformationBlockTypel 2 and the second system information block is a different type.

11. The method of any of claims 8-10, wherein transmitting (508) at least some of the area information via the second system information block comprises including, in the second system information block, an indication of a type for the first system information block.

12. A method, in a user equipment, TIE, served by a wireless communication network, the method comprising:

receiving (702) a plurality of system information blocks;

obtaining (704), from each of the system information blocks, a portion of area

information indicating an area for which a public warning system notification is relevant;

obtaining (706), from each of these same system information blocks, a segment of a message;

assembling (708) area information from the portions of area information;

assembling (710) the message from at least the corresponding segments of the

message;

determining (712), based on the area information, that the message is relevant to the UE; and

displaying (714) the message, in response to said determining.

13. The method of claim 12, wherein assembling (710) the message comprises assembling the message from the portions of the message included in the plurality of system information blocks and at least one message portion included in an additional system information block.

14. The method of claim 12 or 13, wherein the system information blocks are LTE

SystemlnformationBlockTypel 1 blocks or LTE SystemInformationBlockTypel2 blocks.

15. A method, in a user equipment, EE, served by a wireless communication network, the method comprising:

receiving (802) at least a portion of a public warning system notification message via a first system information block;

receiving (804) at least a portion of area information via a second system information block;

determining (806), based on linking information included in the second system

information block, that the area information included in the second system information block corresponds to the message received via the first system information block;

determining (808), based on the area information, that the message is relevant to the EE; and

displaying (810) the message, in response to said determining.

16. The method of claim 15, wherein the linking information comprises a message identifier or a serial number, or both, corresponding to an identical identifier or serial number, or both, in the first system information block.

17. The method of claim 15 or 16, wherein the first system information block is a

SystemInformationBlockTypel2 and the second system information block is a different type.

18. The method of any of claims 15-17, wherein the linking information includes an indication of a type for the first system information block.

19. A network node (30) adapted to perform the methods of any of claims 1-11.

20. A network node (30), comprising:

communication interface circuitry (38), and

processing circuitry (32) operatively associated with the communication interface circuitry (38) and configured to:

obtain a message to be transmitted as a public warning system notification to multiple UEs, via one or more system information blocks;

obtain area information corresponding to the message, the area information indicating an area for which the message is relevant;

determine how many system information blocks are needed for transmitting the area information;

segment the message into a plurality of segments, based on how many system information blocks are needed for transmitting the area information; and

use the communication interface circuit (38) to transmit the message and the area information via system information blocks, such that no more than one segment of the message is included in any of the transmitted system information blocks and such that each portion of the area information included in a transmitted system information block is accompanied by a segment of the message.

21. The network node (30) of claim 20, wherein the processing circuitry (32) is further configured to carry out a method according to any of claims 2-7.

22. A network node (30), comprising:

communication interface circuitry (38), and

processing circuitry (32) operatively associated with the communication interface circuitry (38) and configured to:

obtain a message to be transmitted as a public warning system notification to multiple user equipments, UEs, via one or more system information blocks;

obtain area information corresponding to the message, the area information indicating an area for which the message is relevant;

use the communication interface circuitry (38) to transmit at least some of the message via a first system information block; and use the communication interface circuitry (38) to transmit at least some of the area information via a second system information block, such that the second system information block contains linking information indicating that the included area information corresponds to the message sent via the first system information block.

23. The network node (30) of claim 22, wherein the processing circuitry (32) is further configured to carry out a method according to any of claims 9-11.

24. A user equipment (50) adapted to perform the methods of any of claims 12-18.

25. A user equipment (50) comprising:

transceiver circuitry (56); and

processing circuitry (52) operatively associated with the transceiver circuitry (56) and configured to:

receive a plurality of system information blocks, using the transceiver circuitry (56);

obtain, from each of the system information blocks, a portion of area

information indicating an area for which a public warning system notification is relevant;

obtain, from each of these same system information blocks, a single segment of a message;

assemble area information from the portions of area information;

assemble the message from at least the corresponding segments of the

message;

determine, based on the area information, that the message is relevant to the UE; and

display the message, in response to said determining.

26. The user equipment (50) of claim 25, wherein the processing circuitry (52) is further configured to carry out a method according to claim 13 or 14.

27. A user equipment (50) comprising:

transceiver circuitry (56); and

processing circuitry (52) operatively associated with the transceiver circuitry (56) and configured to:

receive at least a portion of a public warning system notification message via a first system information block;

receive at least a portion of area information via a second system information block;

determine, based on linking information included in the second system

information block, that the area information included in the second system information block corresponds to the message received via the first system information block;

determine, based on the area information, that the message is relevant to the UE; and

display the message, in response to said determining.

28. The user equipment (50) of claim 27, wherein the processing circuitry (52) is further configured to carry out a method according to any of claims 16-18.

29. A computer program comprising instructions that, when executed on at least one processing circuit, cause the at least one processing circuit to carry out the method according to any one of claims 1-18.

30. A carrier containing the computer program of claim 29, wherein the carrier is one of an electronic signal, optical signal, radio signal, or computer readable storage medium.