Emergency broadcast service
The solution provides emergency broadcast service area information to UEs in NTN cells, addressing large coverage and cell change issues, ensuring timely and accurate emergency broadcast delivery.
Patent Information
- Application Number
- PCT/CN2024/123096
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-07-17
AI Technical Summary
Existing wireless communication systems face challenges in providing emergency broadcast services in non-terrestrial networks (NTN) due to large cell coverage areas, satellite movement causing cell changes, and UE uplink synchronization requirements, which are not adequately addressed by current mechanisms designed for terrestrial networks.
Implementing emergency broadcast service area information to UEs in NTN cells, including circle or polygon areas, and specifying UE behavior through dedicated SIBs or paging messages, along with enhanced signaling between RAN and core networks to manage area-specific emergency broadcasts.
Enables effective delivery of emergency broadcasts to specific geographical areas within NTN cells, ensuring timely and accurate reception by UEs while managing cell changes and uplink synchronization.
Smart Images

Figure CN2024123096_17072025_PF_FP_ABST
Abstract
Description
EMERGENCY BROADCAST SERVICETECHNICAL FIELD
[0001] The present disclosure relates to wireless communications, and more specifically to a user equipment, a base station, a network device in a core network, processors, and methods for providing an emergency broadcast service.BACKGROUND
[0002] A wireless communications system may include one or multiple network communication devices, such as base stations, which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication devices, such as a base station may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G)) .
[0003] The feature of non-terrestrial network (NTN) is specified to support radio access network (RAN) deployment over satellite. NTN refers to a network, or a segment of networks using radio frequency (RF) resources on board a satellite. The satellite in NTN may be a geostationary earth orbiting (GEO) satellite with a fixed location to the earth, or a low earth orbiting (LEO) satellite orbiting around the earth. However, there are still some open problems that need to be studied for communication networks, such as, NTN.SUMMARY
[0004] The present disclosure relates to methods, apparatuses, and systems that support an emergency broadcast service, especially for an emergency broadcast service in NTN.
[0005] In a first aspect of the solution, a user equipment (UE) , comprises: a processor; and a transceiver coupled to the processor, wherein the processor is configured to: receive, via the transceiver and from a base station, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; and perform an operation of the following: determining whether to receive the at least one emergency broadcast service based on the emergency broadcast service area information, or determining to process the at least one emergency broadcast service based on the emergency broadcast service area information.
[0006] In some implementations of the user equipment described herein, wherein the first configuration comprises a paging message or a system information block (SIB) , and the SIB comprises at least one of the following: a first SIB for indicating the emergency broadcast service area information; a second SIB for configuring emergency broadcast service for a narrowband internet of things (NB-IoT) UE; or a public warning system (PWS) SIB, wherein the PWS SIB comprises at least one long term evolution (LTE) ETWS SIB or at least one new radio (NR) ETWS SIB.
[0007] In some implementations of the user equipment described herein, wherein the emergency broadcast service area information comprises information related to at least one of a circle area or a polygon area.
[0008] In some implementations of the user equipment described herein, wherein the emergency broadcast service area information comprises at least one of the following: an identifier of a warning message, a serial number of the warning message, or content of the warning message; a warning type indication comprising an emergency broadcast service type indication for a NB-IoT UE or an earthquake and tsunami warning system (ETWS) warning type indication; an area identity, wherein the area identity is associated with at least one of: a paging indication, the warning message, or the warning type indication; a first time duration, wherein the UE considers an area indicated by the emergency broadcast service area information as valid during the first time duration; a second time duration, wherein the UE determines its position if the second time meets an operator policy of the at least one emergency broadcast service.
[0009] In some implementations of the user equipment described herein, wherein the first configuration is the paging message, and the emergency broadcast service area information comprises a paging indication for the at least one emergency broadcast service in the paging message, and wherein the paging indication comprises one of the following: an emergency broadcast service indication for a NB-IoT UE; a paging indication for ETWS; or a paging indication for CMAS.
[0010] Accordingly, in some implementations of the user equipment described herein, wherein the processor is configured to perform the operation of determining whether to receive the at least one emergency broadcast service by determining whether to acquire an emergency broadcast service SIB based on an area indicated by the emergency broadcast service area information, and the processor is further configured to: in the case that the UE is in the area indicated by the emergency broadcast service area information: acquire the emergency broadcast service SIB based on the emergency broadcast service area information; decode emergency broadcast service contents in the emergency broadcast service SIB; deliver the emergency broadcast service contents to upper layers; and upon leaving the area, discard the emergency broadcast service SIB.
[0011] Alternatively, in some implementations of the user equipment described herein, wherein the first configuration is the SIB, and the processor is configured to perform the operation of determining to process the at least one emergency broadcast service based on an area indicated by the emergency broadcast service area information, and the processor is further configured to: in the case that the UE is in the area indicated by the emergency broadcast service area information: decode emergency broadcast service contents in an emergency broadcast service SIB; deliver the emergency broadcast service contents to upper layers; and upon leaving the area, discard the emergency broadcast service contents.
[0012] In some implementations of the user equipment described herein, wherein the processor is further configured to: in the case that the UE is not in the area indicated by the emergency broadcast service area information: ignore the emergency broadcast service contents; or discard the emergency broadcast service contents if the emergency broadcast service contents have been decoded or buffered.
[0013] In some implementations of the user equipment described herein, wherein the processor is further configured to determine whether to initiate a positioning procedure based on at least one of the following: a remaining validity duration based on the first time duration and a valid positioning result; or the second time duration and a third time duration required to perform global navigation satellite system (GNSS) positioning at the UE.
[0014] In some implementations of the user equipment described herein, wherein the processor is further configured to perform, based on a completion of the positioning procedure, one of the following: uplink synchronization; or triggering of reporting for the first time duration of the positioning result.
[0015] In a second aspect of the solution, a base station comprises: a processor; and a transceiver coupled to the processor, wherein the processor is configured to: determine a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; and transmit, via the transceiver and to a user equipment (UE) , the first configuration.
[0016] In some implementations of the base station described herein, wherein the first configuration comprises a paging message or a system information block (SIB) , and the SIB comprises at least one of the following: a first SIB for indicating the emergency broadcast service area information; a second SIB for configuring emergency broadcast service for a narrowband internet of things (NB-IoT) UE; or a public warning system (PWS) SIB, wherein the PWS SIB comprises at least one long term evolution (LTE) ETWS SIB or at least one new radio (NR) ETWS SIB.
[0017] In some implementations of the base station described herein, wherein the emergency broadcast service area information comprises information related to at least one of a circle area or a polygon area.
[0018] In some implementations of the base station described herein, wherein the emergency broadcast service area information comprises at least one of the following: an identifier of a warning message, a serial number of the warning message, or content of the warning message; a warning type indication comprising an emergency broadcast service type indication for a NB-IoT UE or an earthquake and tsunami warning system (ETWS) warning type indication; an area identity, wherein the area identity is associated with at least one of: a paging indication, the warning message, or the warning type indication; a first time duration, wherein the UE considers an area indicated by the emergency broadcast service area information as valid during the first time duration; a second time duration, wherein the UE determines its position if the second time meets an operator policy of the at least one emergency broadcast service.
[0019] In some implementations of the base station described herein, wherein the first configuration is the paging message, and the emergency broadcast service area information comprises a paging indication for the at least one emergency broadcast service in the paging message, and wherein the paging indication comprises one of the following: an emergency broadcast service indication for a NB-IoT UE; a paging indication for ETWS; or a paging indication for CMAS.
[0020] In a third aspect of the solution, a base station comprises: a processor; and a transceiver coupled to the processor, wherein the processor is configured to: perform, via the transceiver and with a network device in a core network, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the network device; or receiving the emergency broadcast service area information from the network device.
[0021] In some implementations of the base station described herein, wherein the emergency broadcast service area information comprises information related to at least one of a circle area or a polygon area.
[0022] In some implementations of the base station described herein, wherein the emergency broadcast service area information comprises at least one of the following: an identifier of a warning message, a serial number of the warning message, or content of the warning message; a warning type indication comprising an emergency broadcast service type indication for a narrowband internet of things (NB-IoT) UE or an earthquake and tsunami warning system (ETWS) warning type indication; an area identity, wherein the area identity is associated with at least one of: the warning message, or the warning type indication; a first time duration, wherein the base station or the network device considers an area indicated by the emergency broadcast service area information as valid during the first time duration.
[0023] In some implementations of the base station described herein, wherein the emergency broadcast service area information is included in at least one of the following: a Write-Replace Warning Response to the network device, and the emergency broadcast service area information is used to indicate in which area a broadcast of a warning message is completed; a Kill Request from the network device, and the emergency broadcast service area information is used to indicate in which area an already ongoing broadcast of a warning message need to be cancelled; a Kill Response to the network device, and the emergency broadcast service area information is used to indicate in which area a broadcast of a warning message is cancelled; a public warning system (PWS) Restart Indication to the network device, and the emergency broadcast service area information is used to inform the network device that PWS information for one or more areas under a coverage of the base station is available for reloading; or a PWS Failure Indication to the network device, and the emergency broadcast service area information is used to inform the network device that an ongoing PWS operation for one or more areas under a coverage of the base station has failed.
[0024] In some implementations of the base station described herein, wherein the processor is further configured to: in the case that the emergency broadcast service area information is received from the network device in the Kill Request, stop the broadcast of the warning message within the indicated area and discard the warning message for that area; or in the case that the emergency broadcast service area information is transmitted to the network device in the PWS Failure Indication, inform the network device at least one of: a reason for failure, a first time to revisit the one or more areas, or a second time to restore the coverage of the base station for the one or more areas.
[0025] In a fourth aspect of the solution, a network device in a core network comprises: a processor; and a transceiver coupled to the processor, wherein the processor is configured to: perform, via the transceiver and with a base station, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the base station; or receiving the emergency broadcast service area information from the base station.
[0026] In some implementations of the network device described herein, wherein the emergency broadcast service area information comprises information related to at least one of a circle area or a polygon area.
[0027] In some implementations of the network device described herein, wherein the emergency broadcast service area information comprises at least one of the following: an identifier of a warning message, a serial number of the warning message, or content of the warning message; a warning type indication comprising an emergency broadcast service type indication for a narrowband internet of things (NB-IoT) UE or an earthquake and tsunami warning system (ETWS) warning type indication; an area identity, wherein the area identity is associated with at least one of: the warning message, or the warning type indication; a first time duration, wherein the base station or a network device in a core network considers an area indicated by the emergency broadcast service area information as valid during the first time duration.
[0028] In some implementations of the network device described herein, wherein the emergency broadcast service area information is included in at least one of the following: a Write-Replace Warning Response from the base station, and the emergency broadcast service area information is used to indicate in which area a broadcast of a warning message is completed; a Kill Request to the base station, and the emergency broadcast service area information is used to indicate in which area an already ongoing broadcast of a warning message need to be cancelled; a Kill Response from the base station, and the emergency broadcast service area information is used to indicate in which area a broadcast of a warning message is cancelled; a public warning system (PWS) Restart Indication from the base station, and the emergency broadcast service area information is used to inform the network device that PWS information for one or more areas under a coverage of the base station is available for reloading; or a PWS Failure Indication from the base station, and the emergency broadcast service area information is used to inform the network device that an ongoing PWS operation for one or more areas under a coverage of the base station has failed.
[0029] In some implementations of the network device described herein, wherein the processor is further configured to: in the case that the emergency broadcast service area information is received from the base station in the Write-Replace Warning Response, consider that the broadcast is unsuccessful in an area not included in the emergency broadcast service area information; in the case that the emergency broadcast service area information is received from the base station in the Kill Response, consider that the base station does not have an ongoing broadcast to stop in an area not included in the emergency broadcast service area information; in the case that the emergency broadcast service area information is received from the base station in the PWS Restart Indication, transmit the emergency broadcast service area information to a cell broadcast center (CBC) / cell broadcast center function (CBCF) ; or in the case that the emergency broadcast service area information is received from the base station in the PWS Failure Indication, transmit the emergency broadcast service area information to a CBC / CBCF.
[0030] In a fifth aspect of the solution, a processor for wireless communication comprises: at least one memory; and a controller coupled with the at least one memory and configured to cause the controller to: receive, from a base station, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; and perform an operation of the following: determining whether to receive the at least one emergency broadcast service based on the emergency broadcast service area information, or determining to process the at least one emergency broadcast service based on the emergency broadcast service area information.
[0031] In a sixth aspect of the solution, a processor for wireless communication comprises: at least one memory; and a controller coupled with the at least one memory and configured to cause the controller to: determine, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; and transmit, to a user equipment (UE) , the first configuration.
[0032] In a seventh aspect of the solution, a processor for wireless communication comprises: at least one memory; and a controller coupled with the at least one memory and configured to cause the controller to: perform, with a network device in a core network, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the network device; or receiving the emergency broadcast service area information from the network device.
[0033] In an eighth aspect of the solution, a processor for wireless communication comprises: at least one memory; and a controller coupled with the at least one memory and configured to cause the controller to: perform, with a base station, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the base station; or receiving the emergency broadcast service area information from the base station.
[0034] In a ninth aspect of the solution, a method performed by a user equipment (UE) , the method comprises: receiving, from a base station, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; and performing an operation of the following: determining whether to receive the at least one emergency broadcast service based on the emergency broadcast service area information, or determining to process the at least one emergency broadcast service based on the emergency broadcast service area information.
[0035] In a tenth aspect of the solution, a method performed by a base station, the method comprises: determining, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; and transmitting, to a user equipment (UE) , the first configuration.
[0036] In an eleventh aspect of the solution, a method performed by a base station, the method comprises: performing, with a network device in a core network, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the network device; or receiving the emergency broadcast service area information from the network device.
[0037] In a twelfth aspect of the solution, a method performed by a network device in a core network, the method comprises: performing, with a base station, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the base station; or receiving the emergency broadcast service area information from the base station.
[0038] It is to be understood that the summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0039] FIG. 1 illustrates an example of a wireless communications system that supports an emergency broadcast service in accordance with aspects of the present disclosure.
[0040] FIG. 2 illustrates an example signaling procedure for an emergency broadcast service in accordance with aspects of the present disclosure.
[0041] FIG. 3 illustrates another example signaling procedure for an emergency broadcast service in accordance with aspects of the present disclosure.
[0042] FIG. 4 illustrates an example procedure for providing an emergency broadcast service in accordance with aspects of the present disclosure.
[0043] FIG. 5 illustrates another example procedure for providing an emergency broadcast service in accordance with aspects of the present disclosure.
[0044] FIG. 6 illustrates an example of device that support an emergency broadcast service in accordance with aspects of the present disclosure.
[0045] FIG. 7 illustrates an example of processor that support an emergency broadcast service in accordance with aspects of the present disclosure.
[0046] FIG. 8 illustrates a flowchart of a method that support an emergency broadcast service in accordance with aspects of the present disclosure.
[0047] FIG. 9 illustrates a flowchart of a method that support an emergency broadcast service in accordance with aspects of the present disclosure.
[0048] FIG. 10 illustrates a flowchart of a method that support an emergency broadcast service in accordance with aspects of the present disclosure.
[0049] FIG. 11 illustrates a flowchart of a method that support an emergency broadcast service in accordance with aspects of the present disclosure.DETAILED DESCRIPTION
[0050] Principles of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein may be implemented in various manners other than the ones described below.
[0051] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0052] References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0053] It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0054] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.
[0055] As used herein, the term “communication network” refers to a network following any suitable communication standards, such as, 5G NR, long term evolution (LTE) , LTE-advanced (LTE-A) , wideband code division multiple access (WCDMA) , high-speed packet access (HSPA) , narrow band internet of things (NB-IoT) , and so on. Further, the communications between a terminal device and a network device in the communication network may be performed according to any suitable generation communication protocols, including but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, and / or any other protocols either currently known or to be developed in the future. Embodiments of the present disclosure may be applied in various communication systems. Given the rapid development in communications, there will also be future type communication technologies and systems in which the present disclosure may be embodied. It should not be seen as limiting the scope of the present disclosure to only the aforementioned systems.
[0056] As used herein, the term “network device” generally refers to a node in a communication network via which a terminal device can access the communication network and receive services therefrom. The network device may refer to a base station (BS) or an access point (AP) , for example, a node B (NodeB or NB) , a radio access network (RAN) node, an evolved NodeB (eNodeB or eNB) , a NR NB (also referred to as a gNB) , a remote radio unit (RRU) , a radio header (RH) , an infrastructure device for a V2X (vehicle-to-everything) communication, a transmission and reception point (TRP) , a reception point (RP) , a remote radio head (RRH) , a relay, an integrated access and backhaul (IAB) node, a low power node such as a femto BS, a pico BS, and so forth, depending on the applied terminology and technology.
[0057] As used herein, the term “terminal device” generally refers to any end device that may be capable of wireless communications. By way of example rather than a limitation, a terminal device may also be referred to as a communication device, a user equipment (UE) , an end user device, a subscriber station (SS) , an unmanned aerial vehicle (UAV) , a portable subscriber station, a mobile station (MS) , or an access terminal (AT) . The terminal device may include, but is not limited to, a mobile phone, a cellular phone, a smart phone, a voice over IP (VoIP) phone, a wireless local loop phone, a tablet, a wearable terminal device, a personal digital assistant (PDA) , a portable computer, a desktop computer, an image capture terminal device such as a digital camera, a gaming terminal device, a music storage and playback appliance, a vehicle-mounted wireless terminal device, a wireless endpoint, a mobile station, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , a USB dongle, a smart device, wireless customer-premises equipment (CPE) , an internet of things (loT) device, a watch or other wearable, a head-mounted display (HMD) , a vehicle, a drone, a medical device (for example, a remote surgery device) , an industrial device (for example, a robot and / or other wireless devices operating in an industrial and / or an automated processing chain contexts) , a consumer electronics device, a device operating on commercial and / or industrial wireless networks, and the like. In the following description, the terms: “terminal device, ” “communication device, ” “terminal, ” “user equipment” and “UE, ” may be used interchangeably.
[0058] Aspects of the present disclosure are described in the context of a wireless communications system.
[0059] FIG. 1 illustrates an example of a wireless communications system 100 that supports an emergency broadcast service in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more network entities 102 (also referred to as network equipment (NE) ) , one or more UEs 104, a core network 106, and a packet data network 108. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a 5G network, such as an NR network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including institute of electrical and electronics engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.
[0060] The one or more network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a radio access network (RAN) , a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.
[0061] A network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112. For example, a network entity 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas 112 may be associated with different network entities 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0062] The one or more UEs 104 (such as UE 104-1 or UE 104-2) may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an internet-of-things (IoT) device, an internet-of-everything (IoE) device, or machine-type communication (MTC) device, among other examples. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In some other implementations, a UE 104 may be mobile in the wireless communications system 100.
[0063] The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in FIG. 1. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in FIG. 1. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100.
[0064] A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
[0065] A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) . In an example, the network entity 102 may be the satellite, there may be full or part of an eNB / gNB on board. A communication link 110 between the satellite 102 and the UE 104, a communication link 110 between the satellite 102 and a BS 102, and a communication link 116 between the BS 102 and core network 106 may be used for the NTN transparent mode. A communication link 110 between the satellite 102 and the UE 104, and a communication link 116 between the satellite 102 (with BS on board) and core network 106 may be used for the NTN regenerative mode.
[0066] In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, such as an integrated access backhaul (IAB) network, an open radio access network (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 102 may include one or more of a CU, a DU, a radio unit (RU) , a RAN intelligent controller (RIC) (e.g., a near-real time RIC (Near-RT RIC) , a non-real time RIC (Non-RT RIC) ) , a service management and orchestration (SMO) system, or any combination thereof.
[0067] An RU may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU)) .
[0068] Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., a layer 3 (L3) , a layer 2 (L2) ) functionality and signaling (e.g., radio resource control (RRC) , service data adaption protocol (SDAP) , packet data convergence protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as a layer 1 (L1) (e.g., physical (PHY) layer) or an L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU 160.
[0069] Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .
[0070] A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.
[0071] The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a packet data network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more network entities 102 associated with the core network 106.
[0072] The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application server 118. In some implementations, one or more UEs 104 may communicate with the application server 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server 118 using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the core network 106 (e.g., one or more network functions of the core network 106) .
[0073] In the wireless communications system 100, the network entities 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.
[0074] One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.
[0075] A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.
[0076] Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.
[0077] In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the network entities 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the network entities 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
[0078] FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.
[0079] As mentioned above, the feature of NTN is specified to support RAN deployment over satellite. NTN refers to a network, or a segment of networks using RF resources on board a satellite. The satellite in NTN may be a GEO satellite with a fixed location to the earth, or a LEO satellite orbiting around the earth.
[0080] The NTN with large coverage is well suited to provide services to more UEs with higher resource efficiency. Meanwhile, satellite operators and vendors also consider to support emergency service broadcast over NTN at least for IoT devices. Therefore, the signalling enhancements of public warning system (PWS) for NB-IoT may need to be developed, which may be extended to all other potential UEs in IoT / NR NTN.
[0081] There may be several issues of supporting emergency broadcast services in NTN. While the emergency broadcast services (i.e., PWS) are supported for terrestrial network (TN) , some technical issues brought by NTN characteristics may need to be addressed, including cell coverage up to thousands of kilometers, cell change due to satellite movement, and UE requirement of uplink synchronization.
[0082] The first issue as mentioned above relates to indicating an emergency broadcast service area to UE in an NTN cell and specifying the corresponding UE behavior. The normal PWS mechanism is designed for TN, and UE may simply judge whether it is in an emergency broadcast service area by its serving cell and the corresponding PWS broadcast configuration it receives. This mechanism is workable based on the assumption that a PWS broadcast service area is larger than a TN cell coverage so that the service area may be mapped to one or more TN cells. However, the diameter of an NTN cell (i.e., the satellite beam footprint size) could be 1000km for LEO and 3500km for GEO, which may be much larger than an emergency broadcast service area. An NTN cell coverage may also across country border on one side of which an emergency broadcast service is not allowed or authorized.
[0083] Normal NB-IoT does not support PWS, and thus a new mechanism may be needed to indicate the information. Meanwhile, the PWS contents may reuse the PWS SIBs for normal LTE UEs (SIB10 / 11 / 12) and NR UEs (SIB6 / 7 / 8) . The main issue is that it is unclear how to associate the intended PWS contents to specific areas that may be smaller than the NTN cell coverage (i.e., a part of an NTN cell coverage area) , and how to notify UE to receive or update the intended PWS contents.
[0084] It is observed that for the earthquake and tsunami warning system (ETWS) , there is no IE to describe a geographical area in the contents of legacy LTE ETWS SIBs (SIB10 and SIB11) or NR ETWS SIBs (SIB6 and SIB7) . For the commercial mobile alert service (CMAS) , warningAreaCoordinatesSegment is introduced as an optional IE of normal LTE CMAS SIB (SIB12) and NR CMAS SIB (SIB8) to describe the alert area coordinates of a CMAS message, but its value range (e.g., 64km radius) and area number limits (a maximum of 10) may not be sufficient for NTN usage. Meanwhile, if warningAreaCoordinatesSegment is used to indicate the Geo-Fencing Maximum Wait Time (when the tag bits are set to 0001) , UE in IoT NTN may have to handle the corresponding impact on positioning procedure triggering and uplink synchronization, including the following.
[0085] First, it is unclear whether receiving warningAreaCoordinatesSegment shall trigger UE global navigation satellite system (GNSS) positioning. And it is uncertain whether the area-based reception of emergency broadcast requires immediate UE GNSS positioning.
[0086] Second, if the Geo-Fencing Maximum Wait Time indicated in warningAreaCoordinatesSegment is shorter than the gnss-PositionFixDuration (the time required to perform GNSS positioning at UE) , it is unclear how to handle UE behavior. And thus it is unclear whether UE shall stop triggering positioning and present the alert to the user.
[0087] Third, for a UE position result originated from receiving warningAreaCoordinatesSegment, it is unclear whether it may be used for uplink synchronization and whether UE reporting of gnss-ValidityDuration (the validity duration of a GNSS positioning result) shall be triggered.
[0088] Generally, to notify UE to receive or update PWS contents, normal ETWS and CMAS may use a dedicated indication in paging message (etws-Indication and cmas-Indication) . These indications are also cell-specific and may not be associated with an area as part of a cell coverage.
[0089] Moreover, in normal PWS, the UE may only discard previously buffered warning contents when entering a new cell. Such discard mechanism is also cell specific and may not be associated with an area as part of a cell coverage.
[0090] The second issue as mentioned above relates to indicating an emergency broadcast service area information between RAN (eNB / gNB) and core network (MME / AMF) .
[0091] Generally, the normal PWS mechanism between eNB / gNB and MME / AMF includes the following PWS procedures.
[0092] Write-Replace Warning: to start or overwrite the broadcasting of warning messages, including Request procedure from MME / AMF and Response procedure from eNB / gNB.
[0093] Kill: to cancel an already ongoing broadcast of a warning message, including Request procedure from MME / AMF and Response procedure from eNB / gNB.
[0094] PWS Restart Indication: to inform the MME / AMF that PWS information for some or all cells of the eNB are available for reloading.
[0095] PWS Failure Indication: to inform the MME / AMF that ongoing PWS operation for one or more cells of the eNB has failed.
[0096] It is observed that, the WarningAreaCoordinates IE may only be included in Write-Replace Warning Request procedure, while for other procedures, the IEs EmergencyAreaID, BroadcastCompletedArea, and BroadcastCancelledArea used are represented by cell ID E-CGI. It means that except for Write-Replace Warning Request, the normal PWS procedures between eNB / gNB and MME / AMF may only indicate cell-level PWS information.
[0097] For emergency broadcast service in a geographical area smaller than an NTN cell, other than Write-Replace Warning Request, the emergency broadcast service area information may also be needed for the following PWS procedures.
[0098] Write-Replace Warning Response: it is unclear how eNB / gNB will indicate in which area the broadcast of a warning message is completed.
[0099] Kill Request: it is unclear how MME / AMF will indicate in which area an already ongoing broadcast of a warning message need to be cancelled.
[0100] Kill Response: it is unclear how eNB / gNB will indicate in which area the broadcast of a warning message is cancelled.
[0101] PWS Restart Indication: it is unclear how eNB / gNB will inform the MME / AMF that PWS information for one or more areas under eNB / gNB coverage are available for reloading.
[0102] PWS Failure Indication: it is unclear how eNB / gNB will inform the MME / AMF that ongoing PWS operation for one or more areas under eNB / gNB coverage has failed. Additionally, the reason, the revisit or coverage restore time may also be useful for network scheduling.
[0103] In summary, this disclosure aims to solve the potential issues of supporting emergency broadcast services in NTN scenarios at least for NB-IoT UEs, focusing on the NTN characteristics including cell coverage up to thousands of kilometers, cell change due to satellite movement, and UE requirement of uplink synchronization.
[0104] This disclosure proposes solutions to indicate the emergency broadcast service area to UE in an NTN cell and to specify the corresponding UE behavior, including contents and association of the emergency broadcast service area information, and the reception or processing of UE based on the emergency broadcast service area information.
[0105] This disclosure also proposes solutions to exchange emergency broadcast service area information between radio access network (RAN) and core network (CN) , allowing indication of starting, stopping, reloading, and failure of area-specific emergency broadcast services between eNB / gNB and MME / AMF.
[0106] In view of the above discussions, some embodiments of the present disclosure propose a solution for providing an emergency broadcast service, especially for providing an emergency broadcast service in NTN. In some embodiments of the proposed solution, at the UE, a first configuration comprising emergency broadcast service area information is received, and the emergency broadcast service area information is associated with at least one emergency broadcast service. Moreover, an operation of the following is performed: determining whether to receive the at least one emergency broadcast service based on the emergency broadcast service area information, or determining to process the at least one emergency broadcast service based on the emergency broadcast service area information. By implementing the example embodiments of the present disclosure, an emergency broadcast service can be provided in NTN.
[0107] In this disclosure, at least two solutions are listed for the issues as mentioned above. For the first solution, in an NTN cell that supports emergency broadcast services, the emergency broadcast service area information is indicated to UE, which relates to the first issue as mentioned above.
[0108] In this case, eNB / gNB may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to UE, and UE may determine whether to receive / process the at least one emergency broadcast service based on the information.
[0109] For example, the contents of the emergency broadcast service area information may include at least one circle area or a polygon area. The format may reuse the radius and referenceLocation defined for NTN or the warningAreaCoordinatesSegment defined for CMAS. Moreover, for example, the emergency broadcast service area information may be included in: a new SIB e.g., dedicated for the area information or for NB-IoT UE; or an existing PWS SIB e.g., LTE ETWS SIBs (SIB10 and SIB11) or NR ETWS SIBs (SIB6 and SIB7) ; or a paging message.
[0110] Furthermore, for example, the emergency broadcast service area information may be associated with the following (that is, the emergency broadcast service area information may include at least one of the following) .
[0111] A paging indication for at least one emergency broadcast service in the paging message, including a new emergency broadcast service indication dedicated for NB-IoT UE, or an existing ETWS / CMAS paging indication (etws-Indication and cmas-Indication) .
[0112] At least one existing warning message identifier (messageIdentifier) , serial number (serialNumber) , or warning message in system information.
[0113] A warning type indication for at least one emergency broadcast service, including a new emergency broadcast service type indication dedicated for NB-IoT UE (e.g., to indicate ETWS or CMAS or other warning) , or an existing ETWS warning type indication (warningType indicating earthquake or tsunami) .
[0114] An area identity, wherein the area identity can be associated with at least one of the above mentioned elements (paging indication, warning message, warning type indication) .
[0115] A validity duration indicating the time duration that UE shall consider the emergency broadcast service area as valid.
[0116] A wait time indicating the time duration that UE shall determine its position meeting operator policy of the emergency service, including a wait time dedicated for NB-IoT UE, or an existing Geo-Fencing Maximum Wait Time indicated by warningAreaCoordinatesSegment.
[0117] In some cases, for example, if the emergency broadcast service area information is included in a paging message, upon receiving the paging message, UE may determine whether to acquire a PWS SIB (anew SIB dedicated for NB-IoT UE or an existing PWS SIB including LTE SIB10, SIB11 or NR SIB6, SIB7) based on the emergency broadcast service area information.
[0118] In some other cases, for example, if the emergency broadcast service area information is included in a SIB, upon receiving the SIB, UE may determine whether to process the associated emergency broadcast service contents based on the emergency broadcast service area information as follows.
[0119] If UE is in the area indicated by the emergency broadcast service area information, UE may decode the corresponding emergency broadcast service contents and deliver them to upper layers. Upon leaving the area, UE may discard the corresponding emergency broadcast service contents it previously decoded or buffered in the area. If UE is not in the area indicated by the emergency broadcast service area information, UE may ignore or discard (if has been decoded or buffered) the corresponding emergency broadcast service contents.
[0120] In some cases, for example, upon receiving the emergency broadcast service area information, UE may decide whether to initiate a positioning procedure. For an example, UE may decide whether to initiate a positioning procedure based on the remaining validity duration of a valid positioning result. For another example, UE may decide whether to initiate a positioning procedure based on the wait time (if associated with the area information) and the time required to perform GNSS positioning at UE (gnss-PositionFixDuration) .
[0121] In some cases, for example, after completing a positioning procedure for the emergency broadcast service area information, UE may use the positioning result for uplink synchronization; and UE may trigger reporting for the validity duration of the positioning result (gnss-ValidityDuration) .
[0122] For the second solution, emergency broadcast service area information is exchanged between eNB / gNB and MME / AMF, which relates to the second issue as mentioned above.
[0123] In this case, eNB / gNB may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to MME / AMF; and MME / AMF may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to eNB / gNB.
[0124] For example, the contents of the emergency broadcast service area information may include at least one circle area or a polygon area. The format may reuse the radius and referenceLocation defined for NTN or the WarningAreaCoordinates defined for CMAS.
[0125] Moreover, for example, the emergency broadcast service area information may be included in the following.
[0126] Write-Replace Warning Response from eNB / gNB to MME / AMF: the information is used to indicate in which area the broadcast of a warning message is completed. If an area is not included in the information, the MME / AMF shall consider that the broadcast is unsuccessful in that area.
[0127] Kill Request from MME / AMF to eNB / gNB: the information is used to indicate in which area an already ongoing broadcast of a warning message need to be cancelled. The eNB / gNB shall stop broadcasting the warning message within the indicated area in the information and discard the warning message for that area.
[0128] Kill Response from eNB / gNB to MME / AMF: the information is used to indicate in which area the broadcast of a warning message is cancelled. If an area is not included in the information, the MME / AMF shall consider that eNB / gNB had no ongoing broadcast to stop in that area.
[0129] PWS Restart Indication from eNB / gNB to MME / AMF: the information is used to inform the MME / AMF that PWS information for one or more areas under eNB / gNB coverage are available for reloading. Upon reception of a PWS RESTART INDICATION message including the information, the MME / AMF may send the information to CBC / CBCF.
[0130] In PWS Failure Indication from eNB / gNB to MME / AMF: the information is used to inform the MME / AMF that ongoing PWS operation for one or more areas under eNB / gNB coverage has failed. eNB / gNB may also inform MME / AMF the reason of failure (e.g., coverage expiry) , the revisit time or coverage restore time of the eNB / gNB to the indicated area. Upon reception of a PWS FAILURE INDICATION message including the information, the MME / AMF may send the information to CBC / CBCF.
[0131] Furthermore, for example, the emergency broadcast service area information may be associated with the following (that is, the emergency broadcast service area information may include at least one of the following) .
[0132] At least one existing warning message identifier (messageIdentifier) , serial number (serialNumber) , or warning message in system information.
[0133] A warning type indication for at least one emergency broadcast service, including a new emergency broadcast service type indication dedicated for NB-IoT UE (e.g., to indicate ETWS or CMAS or other warning) , or an existing ETWS warning type indication (warningType indicating earthquake or tsunami) .
[0134] An area identity, wherein the area identity can be associated with at least one of the above mentioned elements (warning message, warning type indication) .
[0135] A validity duration indicating the time duration that eNB / gNB or MME / AMF shall consider the emergency broadcast service area as valid.
[0136] FIG. 2 illustrates an example signaling procedure 200 for an emergency broadcast service in accordance with aspects of the present disclosure.
[0137] At 210, a base station 202 may determine a first configuration comprising emergency broadcast service area information, where the base station 202 may be an example of network entity 102 in FIG. 1, and the UE 204 may be an example of UE 104 in FIG. 1. The emergency broadcast service area information is associated with at least one emergency broadcast service. At 220, the base station 202 may transmit, to a UE 204, the first configuration 220.
[0138] Accordingly, at 224, the UE 204 may receive, from the base station 202, the first configuration 222. At 230, the UE 204 may perform an operation of the following: determining whether to receive the at least one emergency broadcast service based on the emergency broadcast service area information, or determining to process the at least one emergency broadcast service based on the emergency broadcast service area information.
[0139] In some implementations, the first configuration comprises a paging message or a system information block (SIB) , and the SIB comprises at least one of the following: a first SIB for indicating the emergency broadcast service area information (for example, a new SIB dedicated for indicating the emergency broadcast service area information) ; a second SIB for configuring emergency broadcast service for a narrowband internet of things (NB-IoT) UE (for example, a new SIB dedicated for configuring emergency broadcast service for NB-IoT UE) ; or a public warning system (PWS) SIB, wherein the PWS SIB comprises at least one long term evolution (LTE) ETWS SIB or at least one new radio (NR) ETWS SIB (for example, an existing PWS SIB, e.g., LTE ETWS SIBs (SIB10 and SIB11) or NR ETWS SIBs (SIB6 and SIB7)) .
[0140] In some implementations, the emergency broadcast service area information comprises information related to at least one of a circle area or a polygon area. For example, as mentioned above, the format of the emergency broadcast service area information may reuse the radius and referenceLocation defined for NTN or the warningAreaCoordinatesSegment defined for CMAS.
[0141] In some implementations, the emergency broadcast service area information comprises at least one of the following: an identifier of a warning message, a serial number of the warning message, or content of the warning message (for example, at least one existing warning message identifier (messageIdentifier) , serial number (serialNumber) or warning message in system information) ; a warning type indication comprising an emergency broadcast service type indication for a NB-IoT UE or an earthquake and tsunami warning system (ETWS) warning type indication (for example, a warning type indication for at least one emergency broadcast service, including a new emergency broadcast service type indication dedicated for NB-IoT UE (e.g., to indicate ETWS or CMAS or other warning) , or an existing ETWS warning type indication (warningType indicating earthquake or tsunami) ) ; an area identity, wherein the area identity is associated with at least one of: a paging indication, the warning message, or the warning type indication; a first time duration (for example, a validity duration indicating the time duration) , wherein the UE considers an area indicated by the emergency broadcast service area information as valid during the first time duration; a second time duration (for example, a wait time dedicated for NB-IoT UE, or an existing Geo-Fencing Maximum Wait Time indicated by warningAreaCoordinatesSegment) , wherein the UE determines its position if the second time meets an operator policy of the at least one emergency broadcast service.
[0142] In some implementations, the first configuration is the paging message, and the emergency broadcast service area information comprises a paging indication for the at least one emergency broadcast service in the paging message, and wherein the paging indication comprises one of the following: an emergency broadcast service indication for a NB-IoT UE; a paging indication for ETWS; or a paging indication for CMAS. For example, the emergency broadcast service area information may be associated with the paging indication for the at least one emergency broadcast service in the paging message, including a new emergency broadcast service indication dedicated for NB-IoT UE, or an existing ETWS / CMAS paging indication (etws-Indication and cmas-Indication) .
[0143] Accordingly, in some implementations, the UE may perform the operation of determining whether to receive the at least one emergency broadcast service by determining whether to acquire an emergency broadcast service SIB based on an area indicated by the emergency broadcast service area information. For example, the UE may determine whether to acquire a PWS SIB (e.g., a new SIB dedicated for NB-IoT UE or an existing PWS SIB including LTE SIB10, SIB11 or NR SIB6, SIB7) based on the emergency broadcast service area information. The UE may further: in the case that the UE is in the area indicated by the emergency broadcast service area information: acquire the emergency broadcast service SIB based on the emergency broadcast service area information; decode emergency broadcast service contents in the emergency broadcast service SIB; deliver the emergency broadcast service contents to upper layers; and upon leaving the area, discard the emergency broadcast service SIB.
[0144] Alternatively, in some implementations, the first configuration is the SIB, and the UE may perform the operation of determining to process the at least one emergency broadcast service based on an area indicated by the emergency broadcast service area information, and the UE may further: in the case that the UE is in the area indicated by the emergency broadcast service area information: decode emergency broadcast service contents in an emergency broadcast service SIB; deliver the emergency broadcast service contents to upper layers; and upon leaving the area, discard the emergency broadcast service contents.
[0145] In some implementations, the UE may further: in the case that the UE is not in the area indicated by the emergency broadcast service area information: ignore the emergency broadcast service contents; or discard the emergency broadcast service contents if the emergency broadcast service contents have been decoded or buffered.
[0146] In some implementations, the UE may further determine whether to initiate a positioning procedure based on at least one of the following: a remaining validity duration based on the first time duration and a valid positioning result; or the second time duration and a third time duration required to perform global navigation satellite system (GNSS) positioning at the UE.
[0147] For example, the UE may decide whether to initiate a positioning procedure based on the remaining validity duration of a valid positioning result. The UE may decide whether to initiate a positioning procedure based on the wait time (if associated with the area information) and the time required to perform GNSS positioning at UE (gnss-PositionFixDuration) .
[0148] In some implementations, the UE may further perform, based on a completion of the positioning procedure, one of the following: uplink synchronization; or triggering of reporting for the first time duration of the positioning result. For example, the UE may use the positioning result for uplink synchronization. The UE may trigger reporting for the validity duration of the positioning result (gnss-ValidityDuration) .
[0149] FIG. 3 illustrates another example signaling procedure 300 for an emergency broadcast service in accordance with aspects of the present disclosure.
[0150] At 310, a base station 302 may perform, with a network device 306 in a core network, an operation related to emergency broadcast service area information, where the base station 302 may be an example of network entity 102 in FIG. 1, and the network device 306 may be an example of network device in core network 106 in FIG. 1. The emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the network device; or receiving the emergency broadcast service area information from the network device.
[0151] Accordingly, at 320, the network device 306 in the core network may perform, with the base station 302, a respective operation related to emergency broadcast service area information, and the respective operation comprises at least one of the following: transmitting the emergency broadcast service area information to the base station; or receiving the emergency broadcast service area information from the base station.
[0152] In some implementations, the emergency broadcast service area information comprises information related to at least one of a circle area or a polygon area. For example, as mentioned above, the format of the emergency broadcast service area information may reuse the radius and referenceLocation defined for NTN or the warningAreaCoordinatesSegment defined for CMAS.
[0153] In some implementations, the emergency broadcast service area information comprises at least one of the following: an identifier of a warning message, a serial number of the warning message, or content of the warning message (for example, at least one existing warning message identifier (messageIdentifier) , serial number (serialNumber) or warning message in system information) ; a warning type indication comprising an emergency broadcast service type indication for a narrowband internet of things (NB-IoT) UE or an earthquake and tsunami warning system (ETWS) warning type indication (for example, a warning type indication for at least one emergency broadcast service, including a new emergency broadcast service type indication dedicated for NB-IoT UE (e.g., to indicate ETWS or CMAS or other warning) , or an existing ETWS warning type indication (warningType indicating earthquake or tsunami) ) ; an area identity, wherein the area identity is associated with at least one of: the warning message, or the warning type indication; a first time duration (for example, a validity duration indicating the time duration that eNB / gNB or MME / AMF shall consider the emergency broadcast service area as valid) , wherein the base station or the network device considers an area indicated by the emergency broadcast service area information as valid during the first time duration.
[0154] In some implementations, the emergency broadcast service area information is included in at least one of the following: a Write-Replace Warning Response to the network device, and the emergency broadcast service area information is used to indicate in which area a broadcast of a warning message is completed; a Kill Request from the network device, and the emergency broadcast service area information is used to indicate in which area an already ongoing broadcast of a warning message need to be cancelled; a Kill Response to the network device, and the emergency broadcast service area information is used to indicate in which area a broadcast of a warning message is cancelled; a public warning system (PWS) Restart Indication to the network device, and the emergency broadcast service area information is used to inform the network device that PWS information for one or more areas under a coverage of the base station is available for reloading; or a PWS Failure Indication to the network device, and the emergency broadcast service area information is used to inform the network device that an ongoing PWS operation for one or more areas under a coverage of the base station has failed.
[0155] In some implementations, the network device may further: in the case that the emergency broadcast service area information is received from the base station in the Write-Replace Warning Response, consider that the broadcast is unsuccessful in an area not included in the emergency broadcast service area information; in the case that the emergency broadcast service area information is received from the base station in the Kill Response, consider that the base station does not have an ongoing broadcast to stop in an area not included in the emergency broadcast service area information; in the case that the emergency broadcast service area information is received from the base station in the PWS Restart Indication, transmit the emergency broadcast service area information to a cell broadcast center (CBC) / cell broadcast center function (CBCF) ; or in the case that the emergency broadcast service area information is received from the base station in the PWS Failure Indication, transmit the emergency broadcast service area information to a CBC / CBCF.
[0156] In some implementations, the base station may further: in the case that the emergency broadcast service area information is received from the network device in the Kill Request, stop the broadcast of the warning message within the indicated area and discard the warning message for that area; or in the case that the emergency broadcast service area information is transmitted to the network device in the PWS Failure Indication, inform the network device at least one of: a reason for failure (for example, coverage expiry) , a first time to revisit the one or more areas, or a second time to restore the coverage of the base station for the one or more areas.
[0157] FIG. 4 illustrates an example procedure 400 for providing an emergency broadcast service in accordance with aspects of the present disclosure. FIG. 4 relates to at least three embodiments. That is, the first embodiment, the second embodiment, and the third embodiment, which correspond to handling for SIB in 430, handling for paging in 430, and 420 as illustrated in FIG. 4 respectively.
[0158] For the first embodiment (i.e., corresponds to handling for SIB in 430 in FIG. 4), at 410, eNB / gNB 402 may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to UE 404 in a SIB. The SIB includes the contents of the emergency broadcast service area information including at least one circle area or a polygon area, or an area identity. The SIB also includes at least one of warning message identifier / serial number / content, warning type indication, validity duration or wait time of the indicated area.
[0159] After receiving the SIB, at 430, UE 404 may determine whether to process the at least one emergency broadcast service based on the information. If UE is in the area indicated by the emergency broadcast service area information, UE may decode the corresponding emergency broadcast service contents and delivers to upper layers. Upon leaving the area, UE may discard the corresponding emergency broadcast service contents it previously decoded or buffered in the area. If UE is not in the area indicated by the emergency broadcast service area information, UE may ignore or discard (if has been decoded or buffered) the corresponding emergency broadcast service contents.
[0160] For the second embodiment (i.e., corresponds to handling for paging in 430 in FIG. 4) , at 410, eNB / gNB 402 may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to UE 404 in a paging message. The paging message includes the contents of the emergency broadcast service area information including at least one circle area or a polygon area, or an area identity. The paging message also includes at least one paging indication associated with the emergency broadcast service area information.
[0161] After receiving the paging message, at 430, UE 404 may determine whether to acquire a PWS SIB (anew SIB or an existing PWS SIB including LTE SIB10, SIB11 or NR SIB6, SIB7) based on the emergency broadcast service area information. If UE is in the area indicated by the emergency broadcast service area information, UE may acquire the corresponding emergency broadcast service SIB. Upon leaving the area, UE may discard the corresponding emergency broadcast service SIB it previously acquired in the area. If UE is not in the area indicated by the emergency broadcast service area information, UE ignores or discards (if has been decoded or buffered) the corresponding emergency broadcast service contents.
[0162] For the third embodiment (i.e., corresponds to 420 in FIG. 4) , at 410, eNB / gNB 402 may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to UE in a SIB or a paging message.
[0163] Upon receiving the emergency broadcast service area information, at 420, UE 404 may decide whether to initiate a positioning procedure. For example, UE may decide whether to initiate a positioning procedure based on the remaining validity duration of a valid positioning result. And UE may decide whether to initiate a positioning procedure based on the wait time (if associated with the area information) and the time required to perform GNSS positioning at UE (gnss-PositionFixDuration) .
[0164] After completing a positioning procedure for the emergency broadcast service area information, UE may use the positioning result for uplink synchronization; and UE may trigger reporting for the validity duration of the positioning result (gnss-ValidityDuration) .
[0165] FIG. 5 illustrates another example procedure 500 for providing an emergency broadcast service in accordance with aspects of the present disclosure. FIG. 5 relates to at least five embodiments. That is, the fourth embodiment, the fifth embodiment, the sixth embodiment, the seventh embodiment, and the eighth embodiment, which correspond to 520 and 522, 530 and 532, 540 and 542, 550 and 552, and 560 and 562 as illustrated in FIG. 5 respectively.
[0166] For the fourth embodiment (i.e., corresponds to 520 and 522 in FIG. 5) , at 520, eNB / gNB may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to MME / AMF 506 in Write-Replace Warning Response message. The contents of the emergency broadcast service area information including at least one circle area or a polygon area or an area identity. And the emergency broadcast service area information may be associated with at least one of warning message identifier / serial number / content, warning type indication, or validity duration.
[0167] At 522, the information may be used to indicate in which area the broadcast of a warning message is completed. If an area is not included in the information, the MME / AMF 506 may consider that the broadcast is unsuccessful in that area.
[0168] For the fifth embodiment (i.e., corresponds to 530 and 532 in FIG. 5) , at 530, MME / AMF 506 may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to eNB / gNB 502 in Kill Request message. The contents of the emergency broadcast service area information including at least one circle area or a polygon area or an area identity. And the emergency broadcast service area information can be associated with at least one of warning message identifier / serial number / content, warning type indication, or validity duration.
[0169] At 532, the information may be used to indicate in which area an already ongoing broadcast of a warning message need to be cancelled. The eNB / gNB 502 may stop broadcasting the warning message within the indicated area in the information and discard the warning message for that area.
[0170] For the sixth embodiment (i.e., corresponds to 540 and 542 in FIG. 5) , at 540, eNB / gNB 502 may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to MME / AMF 506 in Kill Response message. The contents of the emergency broadcast service area information including at least one circle area or a polygon area or an area identity. And the emergency broadcast service area information can be associated with at least one of warning message identifier / serial number / content, warning type indication, or validity duration.
[0171] At 542, the information may be used to indicate in which area the broadcast of a warning message is cancelled. If an area is not included in the information, the MME / AMF 506 may consider that eNB / gNB 502 did not have ongoing broadcast to stop in that area.
[0172] For the seventh embodiment (i.e., corresponds to 550 and 552 in FIG. 5) , at 550, eNB / gNB 502 may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to MME / AMF 506 in PWS Restart Indication message. The contents of the emergency broadcast service area information including at least one circle area or a polygon area or an area identity. And the emergency broadcast service area information can be associated with at least one of warning message identifier / serial number / content, warning type indication, or validity duration.
[0173] At 552, the information may be used to inform the MME / AMF 506 that PWS information for one or more areas under eNB / gNB coverage are available for reloading. Upon reception of a PWS Restart Indication message including the information, the MME / AMF 506 may send the information to a cell broadcast center (CBC) / cell broadcast center function (CBCF) .
[0174] For the eighth embodiment (i.e., corresponds to 560 and 562 in FIG. 5) , at 560, eNB / gNB 502 may indicate the emergency broadcast service area information associated with at least one emergency broadcast service to MME / AMF 506 in PWS Failure Indication message. eNB / gNB 502 may also inform MME / AMF 506 the reason of failure (e.g., coverage expiry) , the revisit time or coverage restore time of the eNB / gNB to the indicated area. The contents of the emergency broadcast service area information including at least one circle area or a polygon area or an area identity. And the emergency broadcast service area information may be associated with at least one of warning message identifier / serial number / content, warning type indication, or validity duration.
[0175] At 562, the information may be used to inform the MME / AMF 506 that ongoing PWS operation for one or more areas under eNB / gNB coverage has failed. Upon reception of a PWS FAILURE INDICATION message including the information, the MME / AMF 506 may send the information to CBC / CBCF.
[0176] FIG. 6 illustrates an example of a device 600 that supports an emergency broadcast service in accordance with aspects of the present disclosure. The device 600 may be an example of a UE 104-1 as described herein. The device 600 may support wireless communication with one or more network entities 102, UEs 104, or any combination thereof. The device 600 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 602, a memory 604, a transceiver 606, and, optionally, an I / O controller 608. These components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0177] The processor 602, the memory 604, the transceiver 606, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 602, the memory 604, the transceiver 606, or various combinations or components thereof may support a method for performing one or more of the operations described herein.
[0178] In some implementations, the processor 602, the memory 604, the transceiver 606, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 602 and the memory 604 coupled with the processor 602 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 602, instructions stored in the memory 604) .
[0179] For example, the processor 602 may support wireless communication at the device 600 in accordance with examples as disclosed herein. The processor 602 may be configured to operable to support means for receiving, from a base station, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; and means for performing an operation of the following: determining whether to receive the at least one emergency broadcast service based on the emergency broadcast service area information, or determining to process the at least one emergency broadcast service based on the emergency broadcast service area information. The processor 602 may be configured to operable to support other means for other implementations of method 800.
[0180] The processor 602 may support wireless communication at the device 600 in accordance with examples as disclosed herein. The processor 602 may be configured to operable to support means for determining, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; and means for transmitting, to a user equipment (UE) , the first configuration. The processor 602 may be configured to operable to support other means for other implementations of method 900.
[0181] The processor 602 may support wireless communication at the device 600 in accordance with examples as disclosed herein. The processor 602 may be configured to operable to support means for performing, with a network device in a core network, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the network device; or receiving the emergency broadcast service area information from the network device. The processor 602 may be configured to operable to support other means for other implementations of method 1000.
[0182] The processor 602 may support wireless communication at the device 600 in accordance with examples as disclosed herein. The processor 602 may be configured to operable to support means for performing, with a base station, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the base station; or receiving the emergency broadcast service area information from the base station. The processor 602 may be configured to operable to support other means for other implementations of method 1100.
[0183] The processor 602 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, an FPGA, a programmable logic device, a discrete gate or transistor logic component, a discrete hardware component, or any combination thereof) . In some implementations, the processor 602 may be configured to operate a memory array using a memory controller. In some other implementations, a memory controller may be integrated into the processor 602. The processor 602 may be configured to execute computer-readable instructions stored in a memory (e.g., the memory 604) to cause the device 600 to perform various functions of the present disclosure.
[0184] The memory 604 may include random access memory (RAM) and read-only memory (ROM) . The memory 604 may store computer-readable, computer-executable code including instructions that, when executed by the processor 602 cause the device 600 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. In some implementations, the code may not be directly executable by the processor 602 but may cause a computer (e.g., when compiled and executed) to perform functions described herein. In some implementations, the memory 604 may include, among other things, a basic I / O system (BIOS) which may control basic hardware or software operation such as the interaction with peripheral components or devices.
[0185] The I / O controller 608 may manage input and output signals for the device 600. The I / O controller 608 may also manage peripherals not integrated into the device M02. In some implementations, the I / O controller 608 may represent a physical connection or port to an external peripheral. In some implementations, the I / O controller 608 may utilize an operating system such as or another known operating system. In some implementations, the I / O controller 608 may be implemented as part of a processor, such as the processor 606. In some implementations, a user may interact with the device 600 via the I / O controller 608 or via hardware components controlled by the I / O controller 608.
[0186] In some implementations, the device 600 may include a single antenna 610. However, in some other implementations, the device 600 may have more than one antenna 610 (i.e., multiple antennas) , including multiple antenna panels or antenna arrays, which may be capable of concurrently transmitting or receiving multiple wireless transmissions. The transceiver 606 may communicate bi-directionally, via the one or more antennas 610, wired, or wireless links as described herein. For example, the transceiver 606 may represent a wireless transceiver and may communicate bi-directionally with another wireless transceiver. The transceiver 606 may also include a modem to modulate the packets, to provide the modulated packets to one or more antennas 610 for transmission, and to demodulate packets received from the one or more antennas 610. The transceiver 606 may include one or more transmit chains, one or more receive chains, or a combination thereof.
[0187] A transmit chain may be configured to generate and transmit signals (e.g., control information, data, packets) . The transmit chain may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmit chain may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmit chain may also include one or more antennas 610 for transmitting the amplified signal into the air or wireless medium.
[0188] A receive chain may be configured to receive signals (e.g., control information, data, packets) over a wireless medium. For example, the receive chain may include one or more antennas 610 for receive the signal over the air or wireless medium. The receive chain may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receive chain may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receive chain may include at least one decoder for decoding the processing the demodulated signal to receive the transmitted data.
[0189] FIG. 7 illustrates an example of a processor 700 that supports an emergency broadcast service in accordance with aspects of the present disclosure. The processor 700 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 700 may include a controller 702 configured to perform various operations in accordance with examples as described herein. The processor 700 may optionally include at least one memory 704, such as L1 / L2 / L3 cache. Additionally, or alternatively, the processor 700 may optionally include one or more arithmetic-logic units (ALUs) 700. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0190] The processor 700 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 700) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .
[0191] The controller 702 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 700 to cause the processor 700 to support various operations of a base station in accordance with examples as described herein. For example, the controller 702 may operate as a control unit of the processor 700, generating control signals that manage the operation of various components of the processor 700. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0192] The controller 702 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 704 and determine subsequent instruction (s) to be executed to cause the processor 700 to support various operations in accordance with examples as described herein. The controller 702 may be configured to track memory address of instructions associated with the memory 704. The controller 702 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 702 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 700 to cause the processor 700 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 702 may be configured to manage flow of data within the processor 700. The controller 702 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 700.
[0193] The memory 704 may include one or more caches (e.g., memory local to or included in the processor 700 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 704 may reside within or on a processor chipset (e.g., local to the processor 700) . In some other implementations, the memory 704 may reside external to the processor chipset (e.g., remote to the processor 700) .
[0194] The memory 704 may store computer-readable, computer-executable code including instructions that, when executed by the processor 700, cause the processor 700 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 702 and / or the processor 700 may be configured to execute computer-readable instructions stored in the memory 704 to cause the processor 700 to perform various functions. For example, the processor 700 and / or the controller 702 may be coupled with or to the memory 704, and the processor 700, the controller 702, and the memory 704 may be configured to perform various functions described herein. In some examples, the processor 700 may include multiple processors and the memory 704 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
[0195] The one or more ALUs 700 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 700 may reside within or on a processor chipset (e.g., the processor 700) . In some other implementations, the one or more ALUs 700 may reside external to the processor chipset (e.g., the processor 700) . One or more ALUs 700 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 700 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 700 be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 700 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 700 to handle conditional operations, comparisons, and bitwise operations.
[0196] The processor 700 may support wireless communication in accordance with examples as disclosed herein. The processor 700 may be configured to or operable to support means for means for receiving, from a base station, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; and means for performing an operation of the following: determining whether to receive the at least one emergency broadcast service based on the emergency broadcast service area information, or determining to process the at least one emergency broadcast service based on the emergency broadcast service area information. The processor 700 may be configured to or operable to support other means for other implementations of method 800.
[0197] The processor 700 may support wireless communication in accordance with examples as disclosed herein. The processor 700 may be configured to or operable to support means for determining, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; and means for transmitting, to a user equipment (UE) , the first configuration. The processor 700 may be configured to or operable to support other means for other implementations of method 900.
[0198] The processor 700 may support wireless communication in accordance with examples as disclosed herein. The processor 700 may be configured to or operable to support means for performing, with a network device in a core network, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the network device; or receiving the emergency broadcast service area information from the network device. The processor 700 may be configured to or operable to support other means for other implementations of method 1000.
[0199] The processor 700 may support wireless communication in accordance with examples as disclosed herein. The processor 700 may be configured to or operable to support means for performing, with a base station, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the base station; or receiving the emergency broadcast service area information from the base station. The processor 700 may be configured to or operable to support other means for other implementations of method 1100.
[0200] FIG. 8 illustrates a flowchart of a method 800 that supports an emergency broadcast service in accordance with aspects of the present disclosure. The operations of the method 800 may be implemented by a device or its components as described herein. For example, the operations of the method 800 may be performed by a UE 104 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0201] At 810, the method may include receiving, from a base station, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service. The operations of 810 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 810 may be performed by a device as described with reference to FIG. 1.
[0202] At 820, the method may include performing an operation of the following: determining whether to receive the at least one emergency broadcast service based on the emergency broadcast service area information, or determining to process the at least one emergency broadcast service based on the emergency broadcast service area information. The operations of 820 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 820 may be performed by a device as described with reference to FIG. 1.
[0203] FIG. 9 illustrates a flowchart of a method 900 that supports an emergency broadcast service in accordance with aspects of the present disclosure. The operations of the method 900 may be implemented by a device or its components as described herein. For example, the operations of the method 900 may be performed by a base station 102 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0204] At 910, the method may include determining, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service. The operations of 910 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 910 may be performed by a device as described with reference to FIG. 1.
[0205] At 920, the method may include transmitting, to a user equipment (UE) , the first configuration. The operations of 920 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 920 may be performed by a device as described with reference to FIG. 1.
[0206] FIG. 10 illustrates a flowchart of a method 1000 that supports an emergency broadcast service in accordance with aspects of the present disclosure. The operations of the method 1000 may be implemented by a device or its components as described herein. For example, the operations of the method 1000 may be performed by a base station 102 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0207] At 1010, the method may include performing, with a network device in a core network, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the network device; or receiving the emergency broadcast service area information from the network device. The operations of 1010 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1010 may be performed by a device as described with reference to FIG. 1.
[0208] FIG. 11 illustrates a flowchart of a method 1100 that supports an emergency broadcast service in accordance with aspects of the present disclosure. The operations of the method 1100 may be implemented by a device or its components as described herein. For example, the operations of the method 1100 may be performed by a network device in a core network 106 as described herein. In some implementations, the device may execute a set of instructions to control the function elements of the device to perform the described functions. Additionally, or alternatively, the device may perform aspects of the described functions using special-purpose hardware.
[0209] At 1110, the method may include performing, with a base station, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following: transmitting the emergency broadcast service area information to the base station; or receiving the emergency broadcast service area information from the base station. The operations of 1110 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 1110 may be performed by a device as described with reference to FIG. 1.
[0210] It should be noted that the methods described herein describes possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0211] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
[0212] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0213] Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer. By way of example, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
[0214] As used herein, including in the claims, an article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.
[0215] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A user equipment (UE) , comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:receive, via the transceiver and from a base station, a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; andperform an operation of the following:determining whether to receive the at least one emergency broadcast service based on the emergency broadcast service area information, ordetermining to process the at least one emergency broadcast service based on the emergency broadcast service area information.2.The UE of claim 1, wherein the first configuration comprises a paging message or a system information block (SIB) .3.The UE of claim 1, wherein the first configuration comprises a system information block (SIB) , and the SIB comprises at least one of the following:a first SIB for indicating the emergency broadcast service area information;a second SIB for configuring emergency broadcast service for a narrowband internet of things (NB-IoT) UE; ora public warning system (PWS) SIB, wherein the PWS SIB comprises at least one long term evolution (LTE) ETWS SIB or at least one new radio (NR) ETWS SIB.4.The UE of claim 1, wherein the emergency broadcast service area information comprises information related to at least one of a circle area or a polygon area.5.The UE of claim 1, wherein the emergency broadcast service area information comprises at least one of the following:an identifier of a warning message, a serial number of the warning message, or content of the warning message;a warning type indication comprising an emergency broadcast service type indication for a NB-IoT UE or an earthquake and tsunami warning system (ETWS) warning type indication;an area identity, wherein the area identity is associated with at least one of: a paging indication, the warning message, or the warning type indication;a first time duration, wherein the UE considers an area indicated by the emergency broadcast service area information as valid during the first time duration;a second time duration, wherein the UE determines its position if the second time meets an operator policy of the at least one emergency broadcast service.6.The UE of claim 2, wherein the first configuration is the paging message, and the emergency broadcast service area information comprises a paging indication for the at least one emergency broadcast service in the paging message, and wherein the paging indication comprises one of the following:an emergency broadcast service indication for a NB-IoT UE;a paging indication for ETWS; ora paging indication for CMAS.7.The UE of claim 6, wherein the processor is configured to perform the operation of determining whether to receive the at least one emergency broadcast service by determining whether to acquire an emergency broadcast service SIB based on an area indicated by the emergency broadcast service area information, andthe processor is further configured to:in the case that the UE is in the area indicated by the emergency broadcast service area information:acquire the emergency broadcast service SIB based on the emergency broadcast service area information;decode emergency broadcast service contents in the emergency broadcast service SIB;deliver the emergency broadcast service contents to upper layers; andupon leaving the area, discard the emergency broadcast service SIB.8.The UE of claim 3, wherein the first configuration is the SIB, and the processor is configured to perform the operation of determining to process the at least one emergency broadcast service based on an area indicated by the emergency broadcast service area information, andthe processor is further configured to:in the case that the UE is in the area indicated by the emergency broadcast service area information:decode emergency broadcast service contents in an emergency broadcast service SIB;deliver the emergency broadcast service contents to upper layers; andupon leaving the area, discard the emergency broadcast service contents.9.The UE of claim 7 or 8, wherein the processor is further configured to:in the case that the UE is not in the area indicated by the emergency broadcast service area information:ignore the emergency broadcast service contents; ordiscard the emergency broadcast service contents if the emergency broadcast service contents have been decoded or buffered.10.The UE of claim 5, wherein the processor is further configured to determine whether to initiate a positioning procedure based on at least one of the following:a remaining validity duration based on the first time duration and a valid positioning result; orthe second time duration and a third time duration required to perform global navigation satellite system (GNSS) positioning at the UE.11.A base station, comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:determine a first configuration comprising emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service; andtransmit, via the transceiver and to a user equipment (UE) , the first configuration.12.The base station of claim 11, wherein the first configuration comprises a paging message.13.The base station of claim 11, wherein the first configuration comprises a system information block (SIB) , and the SIB comprises at least one of the following:a first SIB for indicating the emergency broadcast service area information;a second SIB for configuring emergency broadcast service for a narrowband internet of things (NB-IoT) UE; ora public warning system (PWS) SIB, wherein the PWS SIB comprises at least one long term evolution (LTE) ETWS SIB or at least one new radio (NR) ETWS SIB.14.The base station of claim 11, wherein the emergency broadcast service area information comprises information related to at least one of a circle area or a polygon area.15.The base station of claim 11, wherein the emergency broadcast service area information comprises at least one of the following:an identifier of a warning message, a serial number of the warning message, or content of the warning message;a warning type indication comprising an emergency broadcast service type indication for a NB-IoT UE or an earthquake and tsunami warning system (ETWS) warning type indication;an area identity, wherein the area identity is associated with at least one of: a paging indication, the warning message, or the warning type indication;a first time duration, wherein the UE considers an area indicated by the emergency broadcast service area information as valid during the first time duration;a second time duration, wherein the UE determines its position if the second time meets an operator policy of the at least one emergency broadcast service.16.The base station of claim 12, wherein the first configuration is the paging message, and the emergency broadcast service area information comprises a paging indication for the at least one emergency broadcast service in the paging message, and wherein the paging indication comprises one of the following:an emergency broadcast service indication for a NB-IoT UE;a paging indication for ETWS; ora paging indication for CMAS.17.A base station, comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:perform, via the transceiver and with a network device in a core network, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following:transmitting the emergency broadcast service area information to the network device; orreceiving the emergency broadcast service area information from the network device.18.The base station of claim 17, wherein the emergency broadcast service area information comprises information related to at least one of a circle area or a polygon area.19.The base station of claim 17, wherein the emergency broadcast service area information is included in at least one of the following:a Write-Replace Warning Response to the network device, and the emergency broadcast service area information is used to indicate in which area a broadcast of a warning message is completed;a Kill Request from the network device, and the emergency broadcast service area information is used to indicate in which area an already ongoing broadcast of a warning message need to be cancelled;a Kill Response to the network device, and the emergency broadcast service area information is used to indicate in which area a broadcast of a warning message is cancelled;a public warning system (PWS) Restart Indication to the network device, and the emergency broadcast service area information is used to inform the network device that PWS information for one or more areas under a coverage of the base station is available for reloading; ora PWS Failure Indication to the network device, and the emergency broadcast service area information is used to inform the network device that an ongoing PWS operation for one or more areas under a coverage of the base station has failed.20.A network device in a core network, comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:perform, via the transceiver and with a base station, an operation related to emergency broadcast service area information, wherein the emergency broadcast service area information is associated with at least one emergency broadcast service, and the operation comprises at least one of the following:transmitting the emergency broadcast service area information to the base station; orreceiving the emergency broadcast service area information from the base station.21.The network device of claim 20, wherein the emergency broadcast service area information comprises information related to at least one of a circle area or a polygon area.22.The network device of claim 20, wherein the emergency broadcast service area information is included in at least one of the following:a Write-Replace Warning Response from the base station, and the emergency broadcast service area information is used to indicate in which area a broadcast of a warning message is completed;a Kill Request to the base station, and the emergency broadcast service area information is used to indicate in which area an already ongoing broadcast of a warning message need to be cancelled;a Kill Response from the base station, and the emergency broadcast service area information is used to indicate in which area a broadcast of a warning message is cancelled;a public warning system (PWS) Restart Indication from the base station, and the emergency broadcast service area information is used to inform the network device that PWS information for one or more areas under a coverage of the base station is available for reloading; ora PWS Failure Indication from the base station, and the emergency broadcast service area information is used to inform the network device that an ongoing PWS operation for one or more areas under a coverage of the base station has failed.
Citation Information
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