Adaptive Segmentation of Public Warning Systems Messages

Patent metadata

Field	Value
Publication number	US-2023308850-A1
Application number	US-202118018198-A
Country	US
Kind code	A1
Filing date	Jul 2, 2021
Priority date	Jul 30, 2020
Publication date	Sep 28, 2023
Grant date	—

Abstract

A method, in a distributed unit (DU) of a base station comprising a central unit (CU) and one or more DUs, each DU serving one or more cells, comprises sending, to the CU, information indicative of capacity in the DU for sending segmented messages and/or indicative of a capability of the DU to send segmented messages. In some embodiments, the information is indicative of capacity in the DU for sending segmented Public Warning System (PWS) messages and/or indicative of a capability of the DU to send segmented PWS messages. In some embodiments, the method further comprises receiving, from the CU, a segmented PWS message in system information blocks (SIBs), each SIB carrying a segment of the PWS message, and broadcasting the SIBs.

First claim

1 - 60 . (canceled)

61 . A method, performed by a distributed unit (DU) of a base station comprising a central unit (CU) and one or more DUs, each DU serving one or more cells, the method comprising:
sending, to the CU, information indicative of capacity in the DU for sending segmented messages and/or indicative of a capability of the DU to send segmented messages.

62 . The method of claim 61 , wherein the information is indicative of capacity in the DU for sending segmented Public Warning System (PWS) messages and/or indicative of a capability of the DU to send segmented PWS messages.

63 . The method of claim 61 , wherein the method further comprises:
receiving, from the CU, a segmented PWS message in system information blocks (SIBs), each SIB carrying a segment of the PWS message; and broadcasting the SIBs.

64 . The method of claim 61 , wherein said information is specific to each of two or more cells served by the DU.

65 . The method of claim 61 , wherein said information is specific to one of two or more network slices.

66 . The method of claim 61 , wherein the method further comprises:
receiving, from the CU, one or more PWS segments inconsistent with a preference, requirement, capacity, or capability of the DU; and adapting one or more operational parameters or features of the DU to accommodate transmission of the one or more PWS segments.

67 . The method of claim 66 , wherein said adapting comprises any one or more of the following:
changing a system information (SI) window size; changing a bandwidth of a cell served by the DU; changing a sub-carrier spacing used by a cell served by the DU; turning on an additional cell controlled by the DU; and shifting time-frequency resources from another radio access technology sharing spectrum resources.

68 . The method of claim 61 , wherein the method further comprises:
receiving, from the CU, one or more PWS segments inconsistent with a preference, requirement, capacity, or capability of the DU; and sending to the CU, in response to the one or more PWS segments, a message that includes an indication that a PWS transmission failed due to unsuitable segmentation.

69 . The method of claim 61 , wherein the method further comprises:
receiving, from the CU, one or more PWS segments inconsistent with a preference, requirement, capacity, or capability of the DU; receiving an indication from the CU that the DU may segment PWS messages; resegmenting the one or more PWS segments for transmission.

70 . A method, performed by a distributed unit (DU) of a base station comprising a central unit (CU) and one or more DUs, each DU serving one or more cells, the method comprising:
sending, to the CU, at least one parameter indicating a required or recommended segmentation size for segments of messages sent to the DU.

71 . The method of claim 70 , wherein the at least one parameter indicates a required or recommended segment size for segments of Public Warning System (PWS) messages.

72 . The method of claim 71 , wherein the method further comprises:
receiving, from the CU, a segmented PWS message in system information blocks (SIBs), each SIB carrying a segment of the PWS message; and broadcasting the SIBs.

73 . The method of claim 70 , wherein the at least one parameter indicates one or more of the following:
a maximum segment or transport block size; at least one preferred segment or transport block size; and a minimum segment or transport block size.

74 . The method of claim 70 , wherein the method further comprises:
receiving, from the CU, one or more PWS segments inconsistent with a preference, requirement, capacity, or capability of the DU; and adapting one or more operational parameters or features of the DU to accommodate transmission of the one or more PWS segments.

75 . A method, in a central unit (CU) of a base station comprising the CU and one or more distributed units, DUs, each DU serving one or more cells, the method comprising:
receiving, from at least a first DU, information indicative of capacity in the first DU for sending segmented messages and/or indicative of a capability of the first DU to send segmented messages, and/or receiving at least one parameter indicating a required or recommended segmentation size for segments of messages sent to the first DU; and adapting a segmentation of segmented messages in response to the information and/or at least one parameter.

76 . The method of claim 75 , wherein the method further comprises:
sending, to at least the first DU, a segmented PWS message in system information blocks (SIBs), each SIB carrying a segment of the PWS message, for broadcast.

77 . The method of claim 75 , wherein the method comprises receiving the at least one parameter, wherein the at least one parameter indicates one or more of the following:
a maximum segment or transport block size; a preferred segment or transport block size; and a minimum segment or transport block size.

78 . An apparatus configured to operate as a distributed unit (DU) of a base station comprising a central unit (CU) and one or more DUs, each DU serving one or more cells, the apparatus comprising:
radio circuitry configured to communicate with one or more UEs; network interface circuitry configured to communicate with the CU; and processing circuitry operatively coupled to the radio circuitry and the network interface circuitry and configured to send, to the CU, at least one parameter indicating a required or recommended segmentation size for segments of messages sent to the DU.

79 . The apparatus of claim 78 , wherein the at least one parameter indicates a required or recommended segment size for segments of Public Warning System (PWS) messages, and wherein the processing circuitry is further configured to:
receive, from the CU, via the network interface circuitry, a segmented PWS message in system information blocks (SIBs), each SIB carrying a segment of the PWS message; and broadcast the SIBs, via the radio circuitry.

80 . The apparatus of claim 78 , wherein the at least one parameter indicates one or more of the following:
a maximum segment or transport block size; at least one preferred segment or transport block size; and a minimum segment or transport block size.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Nader Ali
• Alsenmyr Gertie
• Omurcali Carin
• Hultström Maria
• Centonza Angelo

Classifications

• H04W4/90 Primary

  Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS] · CPC title

• H04W48/10

  using broadcasted information · CPC title

• H04W76/50

  for emergency connections · CPC title

• H04W88/085

  Access point devices with remote components · CPC title

• H04W48/12

  using downlink control channel · CPC title