Method for transmitting a paging message to a wireless device, preferably an ambient Internet of Things, A-IoT, device
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-02-02
- Publication Date
- 2026-08-13
Smart Images
Figure EP2026052574_13082026_PF_FP_ABST
Abstract
Description
[0001] R. 418040
[0002] - 1 -
[0003] Specification
[0004] Title
[0005] Method for transmitting a paging message to a wireless device, preferably an ambient Internet of Things, A-loT, device
[0006] The invention concerns a method for transmitting a paging message to a wireless device, preferably an ambient Internet of Things, A-loT, device, of a communication network, and a corresponding message of receiving a paging message by a wireless device, preferably an ambient Internet of Things, A-loT, device, of a communication network. Further, the invention concerns a node of a communication network, a wireless device, preferably an ambient loT device, a computer program, and a non-transitory computer readable medium. Moreover, the invention concerns a paging message and a data carrier signal.
[0007] Background
[0008] The state of the art in A-loT devices, as currently studied by 3GPP, encompasses low-complexity, low-energy demanding wireless devices designed for various use-cases, such as inventory management, localization, and sensor data exchange within indoor and outdoor environments. These wireless devices are categorized into three main groups, each with different power consumption and transmission characteristics.
[0009] Type 1 devices have a peak power consumption of approximately 1 pW, comprise an energy storage, and have an initial sampling frequency offset (SFO) of up to 10xppm. They do not have amplification in the device for either downlink (DL) or uplink (UL) transmission, and their UL transmission is based on backscattering an externally provided carrier wave. There may also be a type similar to Type 1 , but without an energy storage.
[0010] Type 2a and Type 2b devices have peak power consumption of a few hundred pW, comprise an energy storage, and have an initial SFO of up to 10xppm. Both types have amplification for DL and / or UL transmission, with Type 2a devicesR. 418040
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[0012] generating UL transmissions by backscattering externally provided carrier waves and Type 2b devices generating UL transmission independently with active radio frequency components.
[0013] The A-loT device may be configured to directly and bidirectionally communicate with a user equipment or a base station. The A-loT device may also be configured to indirectly and bidirectionally communicate with a base station via at least one intermediate node, such as a user equipment (UE), a reader, or a relay.
[0014] The A-loT device may also be configured for receiving downlink transmissions directly from a base station, and for transmitting uplink transmissions to the base station via at least one assisting node. The A-loT device may alternatively be configured for receiving downlink transmission from the base stations via at least one assisting node, and for transmitting uplink transmissions directly to the base station.
[0015] Disclosure of the invention
[0016] According to a first aspect, there is provided a method for transmitting a paging message to a wireless device, preferably an ambient Internet of Things (A-loT) device, of a communication network.
[0017] The method according to the first aspect comprises:
[0018] Providing, by a radio node of the communication network, or, receiving, by the radio node, from a core network node a paging information regarding a wireless device, preferably an A-loT device, to be paged; and Based on the provided paging information, transmitting, by the radio node, a paging message to the wireless device, preferably the A-loT device, wherein the paging message contains
[0019] o an identification information of the wireless device, preferably of the A-loT device, to be paged, and
[0020] o at least a further information selected from a group comprising information regarding
[0021] ■ a transmission of data to be transmitted from the wireless device to the radio node,R. 418040
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[0023] ■ a channel access of the wireless device and / or an allocation of resources for the wireless device,
[0024] ■ avoidance of message duplication,
[0025] ■ geographical and / or application related identification information,
[0026] ■ a group of radio nodes paging the wireless device.
[0027] The method according to the first aspect can be understood as a method for wireless communications, specifically of operating the radio node, of the communication network, particularly performed by the radio node.
[0028] According to a second aspect, there is provided a method for receiving a paging message by a wireless device, preferably an A-loT device, of a communication network.
[0029] The method according to the second aspect comprises:
[0030] Receiving, by the wireless device, preferably the A-loT device, a paging message from a radio node of the communication network, wherein the paging message contains
[0031] o an identification information of the wireless device, preferably of the A-loT device, and
[0032] o at least a further information selected from a group comprising information regarding
[0033] ■ a transmission of data to be transmitted from the wireless device to the radio node,
[0034] ■ a channel access of the wireless device and / or an allocation of resources for the wireless device,
[0035] ■ avoidance of message duplication,
[0036] ■ geographical and / or application related identification information,
[0037] ■ a group of radio nodes paging the wireless device.
[0038] The method according to the second aspect can be understood as a method for wireless communications, specifically of operating the wireless device, preferably the A-loT device, of the communication network, particularly performed by the wireless device.R. 418040
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[0040] According to a third aspect, there is provided a node of a communication network. The node is adapted to execute the method according to the first aspect, or its embodiments. Preferably, the node is a radio node, e.g., a base station or a user equipment.
[0041] According to a fourth aspect, there is provided a wireless device, preferably an A-loT device, of a communication network. The wireless device is adapted to execute the method according to the second aspect, or its embodiments.
[0042] According to a fifth aspect, there is provided a computer program comprising machine-readable instructions to cause
[0043] the node as defined by the third aspect to execute the method according to the first aspect, and / or its embodiments, and / or
[0044] the wireless device as defined by the fourth aspect to execute the method according to the second aspect, and / or its embodiments.
[0045] According to a sixth aspect, there is provided a non-transitory computer readable medium having stored thereon the computer program as defined by the fifth aspect.
[0046] According to a seventh aspect, there is provided a paging message to be transmitted from a radio node of a communication network to a wireless device, preferably an A-loT device, of the communication network. The paging message comprises
[0047] a first data field representing an identification information of the wireless device, preferably of the A-loT device, to be paged, and
[0048] at least a second data field representing a further information selected from a group comprising information regarding
[0049] o a transmission of data to be transmitted from the wireless device to the radio node,
[0050] o a channel access of the wireless device and / or an allocation of resources for the wireless device,
[0051] o avoidance of message duplication,
[0052] o geographical and / or application related identification information, o a group of radio nodes paging the wireless device.R. 418040
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[0054] The paging message may be embodied in a data structure comprising the first data field and at least the second data field. The paging message is preferably transmitted on a Paging Control Channel (PCCH) of the communication network.
[0055] According to an eighth aspect, there is provided a data carrier signal carrying the computer program as defined by the fifth aspect, and / or its embodiments, or the message as defined by the seventh aspect, and / or its embodiments.
[0056] The communication network may comprise a wireless network and a core network. The communication network may be configured as a cellular network, preferably according to 3GPP specifications, e.g., according to 3GPP release 18 or beyond. The communication network comprises at least one radio node and at least one wireless device, preferably at least one A-loT device. The radio node may be configured as a reader for ambient loT devices, or a relay or an integrated access and backhaul (IAB) node.
[0057] The wireless device may be configured as a low-energy or low-power device. The wireless device may have a peak power consumption of less than 1 mW, preferably less than 500 pW, specifically less than 100 pW, according to an embodiment, less than 10 pW, e.g., approximately 1 pW.
[0058] The wireless device is preferably configured for energy harvesting, thus exploiting ambient energy sources, e.g., radio waves, thermal radiation, mechanical vibrations etc. as power supply. The wireless device may or may not comprise an energy storage, e.g., a battery.
[0059] Specifically, the wireless device is different from a Reduced Capability (Redcap) device, a narrow band loT (NB-loT) device, a device for enhanced machine-type communication (eMTC), e.g., due to its lower hardware complexity and / or lower costs, and / or smaller form factors. Additionally, a communication between the wireless device and the radio node may not be controlled by a Radio Resource Control (RRC) layer. Particularly, a Hybrid Automated Repeat Request (HARQ) procedure may not be deployed or deployable for the communication between the wireless device and the radio node.
[0060] The wireless device may be arranged on or part ofR. 418040
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[0062] an environmental sensor, e.g., deployed in smart buildings, industrial facilities, and urban infrastructure to enable environmental monitoring and control,
[0063] a smart home device to enable remote monitoring and control of home environments for energy efficiency, security, and convenience, a wearable health and / or fitness tracker to enable personal health and fitness tracking, as well as remote patient monitoring in healthcare applications,
[0064] an asset tracking device to enable monitoring the location and status of assets, vehicles, and inventory in logistics, transportation, and supply chain management applications,
[0065] an industrial loT sensor and / or actuator to enable monitoring and controlling machinery, equipment, and processes,
[0066] a smart agriculture device to enable optimizing resource usage and improving crop yields,
[0067] a smart city infrastructure unit to enable smart street lighting, traffic monitoring, waste management, public safety, and environmental monitoring.
[0068] The proposed solution addresses the challenge of providing an efficient paging mechanism for wireless devices, especially power-constrained A-loT devices. A specialized paging message reduces overhead compared to 3GPP NR paging, accommodating the limited resources of A-loT devices. Including further information within the paging message optimizes communication by conveying details about data transmission, channel access, and resource allocation directly. This further information also includes mechanisms for avoiding message duplication, improving efficiency and conserving power. Finally, by incorporating geographical / application-related identification and information about the paging radio nodes, the solution enables targeted paging for a wide range of A-loT applications.
[0069] According to an embodiment of the first aspect, the paging information is received, by the radio node, from the core network node, and the received paging information contains the identification information and the at least one further information. By having the core network node generate the complete paging information, this embodiment simplifies the radio node's role to solely transmittingR. 418040
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[0071] the pre-constructed message. This centralization reduces processing overhead and potential latency at the radio node, contributing to a more efficient paging process.
[0072] According to an embodiment of the first aspect, the paging information is received, by the radio node, from the core network node, and the method further comprises:
[0073] Determining, by the radio node, the identification information and / or the at least one further information by modifying and / or supplementing the received paging information.
[0074] This embodiment enhances flexibility by enabling the radio node to adapt the paging message based on local conditions or real-time network status, optimizing transmission and potentially improving performance.
[0075] According to an embodiment of the first aspect, the method further comprises:
[0076] Receiving, by the radio node, a message in response to the paging message, wherein the message
[0077] o is part of a random access procedure of the wireless device, or o contains data, specifically measurements generated by the wireless device.
[0078] In analogy, according to an embodiment of the second aspect, the method further comprises:
[0079] Transmitting, by the wireless device, and / or receiving, by the radio node, a message in response to the paging message, wherein the message o is part of a random access procedure of the wireless device, or o contains data, specifically measurements generated by the wireless device.
[0080] According to an embodiment, the message is a random access preamble, optionally followed by a subsequent message containing data, such as measurements generated by the wireless device. According to another embodiment, the paging message indicates that the random access procedure should be skipped, permitting the message to carry data. The data contained in the message may be payload data, e.g., application data, or use case data, or service data.R. 418040
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[0082] By triggering a random access procedure or data transmission, data acquisition and control processes are streamlined. This improves system responsiveness, allows for confirmation of paging message reception, and enhances overall efficiency and reliability.
[0083] According to an embodiment of the first and / or the second aspect, the information regarding a transmission of data to be transmitted from the wireless device to the radio node represents at least one of:
[0084] a transmission type information indicating whether data shall be transmitted, by the wireless device, once or periodically,
[0085] a periodicity information indicating a periodicity at which the data shall be transmitted by the wireless device,
[0086] a transmission duration information indicating a duration for which the data shall be transmitted by the wireless device or a number of data transmissions by the wireless device,
[0087] a content type information indicating a type of content to be included in the data transmissions,
[0088] a content trigger information indicating a content to be generated and / or updated, specifically by performing measurements, by the wireless device for the data transmission,
[0089] a failure information indicating a failed transmission of a data packet or of at least one data unit of a data packet transmitted by the wireless device. The transmission type information may indicate whether the wireless device should transmit data once (triggered by the paging message, and, optionally, without any further transmissions till the reception of a subsequent paging message) or periodically. For example, a value of "0" could indicate a single transmission, while "1" could indicate periodic transmissions. This allows the network or reader to trigger periodic data transmissions from wireless devices for use cases requiring regular information updates.
[0090] The periodicity information may indicate a periodicity / a rate of transmissions, or an interval between transmissions. This could be expressed as a time value (e.g., 0,5 Hz, 1 ms) or a number of time slots / frames in the communication system. The transmission duration information may indicate how long the data transmission should last or the number of data packets / frames to be transmitted. For periodic reporting, this information may specify an end of a transmission / reportingR. 418040
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[0092] period, defined either by a number of transmissions or another criterion determined by the network or reader.
[0093] The content type information field may indicate the type of data to be transmitted by the wireless device. This could be encoded using predefined values, for example: "0" for sensor readings, "1 " for location information, "2" for energy or buffer status, etc. The content trigger information may be used to trigger specific measurements by the wireless device. For instance, the paging message could request an energy reading, a buffer reading regarding the availability and / or size of (new) data in the buffer, or a location update. This field could contain a specific measurement identifier or a combination of identifiers to request multiple measurements simultaneously.
[0094] The failure information may indicate a failure of a data transmission transmitted in response to the last paging message. The failed data packet, or one or multiple failed segments or data units of the data packets may be indicated in the failure information. In addition, a request for re-transmission of the failed data packet or data unit may be signaled with help of the paging message
[0095] This allows for enabling tailored data acquisition from the wireless device and for providing richer context and control instructions directly within the paging message.
[0096] According to an embodiment of the first and / or the second aspect, the information regarding a channel access of the wireless device and / or an allocation of resources for the wireless device represents at least one of:
[0097] a contention information indicating whether a random access procedure to be performed, by the wireless device, subsequently to the reception of the paging message is contention-based or contention-free,
[0098] a random access type information indicating a type of a random access procedure to be performed, by the wireless device, subsequently to the reception of the paging message,
[0099] an access attempt information indicating a maximum number of unsuccessful attempts to access a random channel, by the wireless device, subsequently to the reception of the paging message,R. 418040
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[0101] a resource information indicating an allocation of resources to the wireless device for a transmission of data, wherein the resource information preferably comprises a resource indication in time and / or frequency,
[0102] an acknowledgement information indicating whether reception of transmitted data shall be acknowledged by the wireless device, a failure information indicating a failed transmission of a random access message transmitted by the wireless device.
[0103] The contention information indicates whether a subsequent random access procedure should be contention-based or contention-free. For example, a "contention flag" set to "1" could indicate contention-based access, while "0" signifies contention-free access. This allows the network to manage channel access efficiently based on current network load and device requirements.
[0104] The random access type information specifies a type of random access procedure the wireless device should employ (e.g., 2-step, 3-step, or other defined procedures). A numerical value or specific identifier could represent each random access type. This ensures compatibility and efficient utilization of the access method.
[0105] The access attempt information specifies the maximum number of unsuccessful random access attempts allowed. A numerical value could indicate the maximum number of attempts or retries. This limits potential channel congestion and helps conserve device power.
[0106] By utilizing the resource information, resources can be allocated for the device's data transmission, including time slots and / or frequency channels. The resource information could be an index into a resource allocation table known to both the device and the network, or explicit time and frequency parameters. This eliminates the need for separate resource allocation signaling, reducing overhead and latency.
[0107] The acknowledgement information indicates whether the wireless device is required to acknowledge the reception of transmitted data from the radio node to the wireless device. A flag (e.g., "1 " for acknowledgement required, "0" for noR. 418040
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[0109] acknowledgement) could convey this information. This provides reliability control, ensuring successful data delivery.
[0110] The failure information may indicate a failure of a random access message, e.g., a random access preamble, or a third message of the random access procedure, transmitted in response to the last paging message. The failed random access message may be indicated in the failure information. This allows to initiate channel re-access in the next paging round.
[0111] According to an embodiment of the first and / or the second aspect, the information regarding avoidance of message duplication represents at least one of:
[0112] an information indicating that the transmitted paging message will not be duplicated or a response to the transmitted paging message shall not be duplicated,
[0113] a retransmission information indicating that the transmitted paging message is a retransmission,
[0114] a first paging information indicating that the transmitted paging is a first paging message for a specific application at least partially performable or performed by the wireless device, or for a use case the paging message is associated with.
[0115] For indicating that the transmitted paging message will not be duplicated or a response to the transmitted paging message shall not be duplicated, a flag, a counter, an ID etc. may be used. For example, a "duplication flag" set to "1" could instruct the device not to respond if it has already responded to an identical paging message, preventing redundant transmissions. This flag can apply to either the paging message itself (preventing retransmission by the network) or the device's response.
[0116] The retransmission information may explicitly identify the paging message as a retransmission. This allows the device to differentiate between a new paging request and a repeated attempt, enabling it to respond appropriately (e.g., ignore the retransmission if it has already responded).
[0117] The first paging information may be embodied in a first paging message indicator. The first paging information indicates whether the paging message isR. 418040
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[0119] the first one for a specific application or use case or service. This information enables the wireless device to perform initialization or setup tasks required only for the first activation of a given application / use case, avoiding unnecessary processing upon repeated paging requests within the same application / use case context.
[0120] According to an embodiment of the first and / or the second aspect, the information regarding geographical and / or application related identification information represents at least one of:
[0121] an application identification information of an application at least partially performable or performed by the wireless device
[0122] a transaction identification information of a transaction of an application comprising multiple transactions,
[0123] a use case information of a use case the paging message is associated with,
[0124] a group identification information of a group of wireless devices which the wireless device is assigned to,
[0125] a zone identification information of a spatial zone the wireless devices is located in.
[0126] The application identification information may identify a specific application on the wireless device that the paging message targets. A respective field in the paging message could contain an application ID or name. This enables selective activation and response handling within the device, crucial when multiple applications might be present.
[0127] For applications involving multiple transactions, the transaction identification information may identify the specific transaction associated with the paging message. This could be a transaction ID or sequence number. This allows the device to handle different transactions concurrently and efficiently.
[0128] The use case information identifies the specific use case the paging message relates to. This could be a use case ID or a descriptive string. This allows the device to tailor its response based on the intended use case, optimizing resource utilization and power consumption.R. 418040
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[0130] The use case may be selected from a group comprising indoor and / or outdoor use cases, specifically, indoor inventory management (e.g., automated warehousing, automobile manufacturing), airport terminal management, and end-to-end logistics), indoor sensor monitoring (e.g., smart home monitoring, smart agriculture monitoring, and base station machine room environmental supervision), indoor positioning (e.g., finding a lost item, indoor navigation, ranging within a home, and positioning within a shopping center), indoor command and control (e.g., online modification of medical instrument status, device activation and deactivation, and elderly health care monitoring), outdoor inventory management (e.g., medical instrument inventory management and positioning, non-public network logistics tracking, airport terminal management, and automated supply chain distribution), outdoor sensor monitoring (e.g., smart grid monitoring, forest fire monitoring, smart manhole cover safety monitoring, and smart bridge health monitoring), outdoor positioning (e.g., finding a lost item, outdoor navigation, and personal belongings tracking), and outdoor command and control (e.g, online modification of medical instrument status, device activation and deactivation, elderly health care monitoring, and controller operation in smart agriculture).
[0131] The group identification information may identify group of wireless devices to which the targeted device belongs. A group ID could be used to indicate the group. This allows for efficient group-based paging, where a single paging message can activate multiple devices simultaneously.
[0132] The zone identification information may identify a spatial zone where the device is located or expected to be located. A zone ID, coordinates, or other location descriptors could be used. This enables location-aware paging and services.
[0133] According to an embodiment of the first and / or the second aspect, the information regarding a group of radio nodes paging the wireless device represents at least one of:
[0134] a group identification information of a group of radio nodes paging the wireless device,
[0135] a group paging information indicating that the same paging message is transmitted to the wireless device by a group of radio nodes.R. 418040
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[0137] If multiple radio nodes are involved in paging, this group identification information may identify the specific group of nodes participating in the paging process. A group ID could represent this group of paging nodes. This allows the device to understand the scope of the paging operation (e.g., localized or wider-area paging).
[0138] The group paging information may indicate that the same paging message is being transmitted by multiple radio nodes in a coordinated fashion. A flag (e.g., "1" for group paging, "0" for single node paging) may convey the group paging information. This allows the device to avoid responding multiple times to the same paging request, saving power and reducing unnecessary communication overhead.
[0139] According to an embodiment of the first and / or the second aspect, the paging message further contains an identification information of the radio node transmitting the paging message to the wireless device. The identification information may be embodied in a unique radio node ID. This allows the device to identify the source of the paging and respond accordingly, particularly relevant in scenarios with multiple potential paging nodes.
[0140] According to a further aspect of the invention, there is provided a (wireless) communication network comprising at least a (radio) node according to the third aspect, or its embodiments, and at least one wireless device, preferably at least one A-loT device, according to the fourth aspect, or its embodiments.
[0141] According to a further aspect of the invention, there is provided a method of operating the communication network. The method of operating the communication network comprises the steps of the method according to the first aspect, or its embodiments, and the steps of the method according to the second aspect, or its embodiments.
[0142] The non-transitory computer readable medium is preferably configured to store the computer program to be executed by a processor of the first LAN element and / or the second LAN element and / or the communication network. The non-transitory computer readable media may include RAM, ROM, EEPROM, and any other non-volatile storage device.R. 418040
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[0144] Description of the figures
[0145] Exemplary embodiments of the present invention are depicted in the figures, which are not to be construed as limiting the claims, and are explained in greater detail below.
[0146] Fig. 1 schematically illustrates a communication network according to an embodiment of the invention; and
[0147] Fig. 2A,B,C schematically illustrate methods according to embodiments of the invention.
[0148] Fig. 1 schematically illustrates a communication network 10 according to an aspect of the invention. The communication network 10 is configured as a cellular communication network 10, preferably according to 3GPP specifications, e.g., a 5G, or 6G communication network.
[0149] The communication network 10 comprises a core network 12 with at least one core network node 14. Further, the communication network 10 comprises a first radio node 16, e.g., a base station 16, a second radio node 18, e.g., a user equipment 18, and a group 20 of wireless devices 20a, 20b, 20c, configured as ambient Internet of Things, A-loT, devices 20a, 20b, 20c, specifically according to 3GPP specifications.
[0150] In A-loT AS layer, the A-loT paging functionality is to use A-loT paging message to indicate device(s) that need to respond.
[0151] For notifying one, multiple, or all of the group 20 of A-loT devices 20a, 20b, 20c that a message must be transmitted by the respective A-loT device(s) 20a, 20b, 20c, the communication network 10 is adapted to transmit paging messages to one, multiple, or all of the group 20 of A-loT devices 20a, 20b, 20c. For example, a random access procedure and / or a transmission of data by the respective A-loT device(s) 20a, 20b, 20c is triggered by transmitting the paging message.R. 418040
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[0153] To this end, the core network node 14 is adapted, to generate a paging information regarding at least one of the A-loT devices 20a, 20b, 20c. The generated paging information may be a paging message with a defined format.
[0154] The core network node 14 is further adapted, to transmit the generated paging information to the base station 16. The base station 16 is adapted, to receive the transmitted paging information.
[0155] According to a first embodiment, the paging information contains an identification information of the respective A-loT device(s) 20a, 20b, 20c to be paged and at least one further information selected from a group comprising information regarding
[0156] a transmission of data to be transmitted from the wireless device to the radio node,
[0157] a channel access of the wireless device and / or an allocation of resources for the wireless device,
[0158] avoidance of message duplication,
[0159] geographical and / or application related identification information, a group of radio nodes paging the wireless device.
[0160] In other words, the received paging information represents the paging message to be transmitted to the respective A-loT device(s) 20a, 20b, 20c to be paged.
[0161] According to a second embodiment, the base station 16 is adapted to determine the identification information and / or the at least one further information by modifying and / or supplementing the received paging information. For example, the base station 16 is adapted to change a format or structure of the received paging information, and / or to add further paging information to the received paging information. The base station 16 may be adapted to change one or multiple data fields or flags of the received paging information, and / or to add and / or replace at least parts of the received paging information with additional paging information. In other words, the identification information and / or the at least one further information contained by the paging message is provided at least partially by the base station 16.
[0162] Different alternatives are provided for transmitting the paging information to the respective A-loT device(s) 20a, 20b, 20c. The base station 16 is adapted toR. 418040
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[0164] transmit the paging message either directly or via an intermediate node to the respective A-loT device(s) 20a, 20b, 20c.
[0165] According to a first alternative, the base station 16 is configured as an A-loT reader node. Specifically, the base station 16 is configured to directly and bidirectionally communicate with the respective A-loT device(s) 20a, 20b, 20c.
[0166] According to a second alternative, the user equipment 18 is configured as an intermediate node between the base station 16 and the respective A-loT device(s) 20a, 20b, 20c. Here, the second radio node 18 may also be a relay, an Integrated Access and Backhaul (IAB) node, a repeater etc. The user equipment 18 is configured to transfer A-loT data and / or signalling between the base station 16 and the respective A-loT device(s) 20a, 20b, 20c.
[0167] According to a third alternative, the user equipment 18 is configured as an intermediate node between the base station 16 and the respective A-loT device(s) 20a, 20b, 20c for one of the two directions of communication between the base station 16 and the respective A-loT device(s) 20a, 20b, 20c. Again, the second radio node 18 may also be a relay, an Integrated Access and Backhaul (IAB) node, a repeater etc. The user equipment 18 is configured to transmit transfer from the base station 16 to the respective A-loT device(s) 20a, 20b, 20c. The base station 16 is configured to receive A-loT data directly and unidirectionally from the respective A-loT device(s) 20a, 20b, 20c.
[0168] For the second and third alternative, the user equipment 18 may be adapted to (further) modify and / or supplement the paging information as received from the base station 16. In this case, the identification information and / or the at least one further information contained by the paging message is provided at least partially (also) by the user equipment 18.
[0169] Information fields of the paging message may contain at least one of:
[0170] - Service ID: This field indicates the specific A-loT application on the device. Because multiple A-loT applications may be installed or running concurrently, this ID allows the paging message to target a particular application. It may also include a port ID for more specific addressing within the application.R. 418040
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[0172] - Transaction ID: This field indicates the individual transaction or data unit within a service or use case. This allows differentiation between multiple ongoing operations related to the same service or use case.
[0173] - Use Case ID: This field indicates the specific use case for which the paging message was generated. It informs the device about the expected data type and any required response information. It may also specify the required quality of service.
[0174] - Device ID: This field indicates the unique ID of the target A-loT device for the paging message. The ID can be pre-configured or dynamically allocated by the network or a reader.
[0175] - Trigger Type: This field indicates whether the paged device(s) should report data once (single transmission) or periodically. The network or reader uses this field to initiate either a single data transmission or ongoing periodic reporting for use cases requiring regular updates.
[0176] - Report Rate: This field indicates the rate of reporting measured data from the device to the reader (D2R) when the Trigger Type is set to periodic. - Duration or Number of Reports: This field indicates when the reporting period should end for periodic data transmissions. This can be specified as a number of transmissions or other conditions defined by the network or reader.
[0177] - Group ID: This field indicates a group of A-loT devices. A group ID is assigned to member devices of a group, and using this ID in a paging message triggers all devices within that group to respond. Group membership can be assigned by the reader, the network, preconfiguration, or based on predefined conditions.
[0178] - Zone ID: This field indicates a geographical zone. Devices located within the indicated zone are expected to respond to the paging message. The zone ID can be assigned by a reader or the network.
[0179] - Reader ID: This field indicates the identity of the reader that originated the paging message. This allows A-loT devices to distinguish between paging requests from different readers. The reader or the network can add this ID to the paging message.
[0180] - Contention-Free Access Flag: This field indicates whether the channel access for the A-loT device(s) should be contention-free or contentionbased. For example, a value of 1 could indicate contention-free access, while 0 indicates contention-based access.R. 418040
[0181] - 19 -
[0182] - Enable / Disable Acknowledgement for R2D: This field indicates whether the A-loT device should send an acknowledgement for each Reader-to- Device (R2D) transmission received successfully. For example, a value of 1 could mandate an acknowledgement, while 0 would disable acknowledgements.
[0183] - Random Access Type: This field indicates the specific type of random access procedure the A-loT device should use. Since multiple random access procedures may exist (e.g., 2-step, 3-step), this field specifies the desired procedure.
[0184] - Number of Trials to Access the Channel: This field indicates the maximum number of attempts an A-loT device can make to access the channel using a random access procedure.
[0185] - Resource Index: This field indicates resources allocated for Device-to- Reader (D2R) transmissions. The field uses an index to refer to a specific time / frequency resource block. A reader or the network can include this index in the paging message.
[0186] - Time Resources for D2R: This field indicates the specific time resources allocated for A-loT device-to-reader (D2R) communication.
[0187] - Frequency Resources for D2R: This field indicates the specific frequency resources allocated for A-loT device-to-reader (D2R) communication. - Measurement Trigger: This field indicates a trigger for measurement reports from the A-loT device. These reports can include information such as energy status, data size, or a single bit indicating data presence in the buffer (useful when the device needs to signal only the presence of new data without transmitting the data itself).
[0188] - Type of Measurement: This field indicates the type of measurement being reported by the device, such as energy status, data size, etc.
[0189] - Refreshing Measurement Flag: This field indicates that the device should discard any previously stored measurements, take a new measurement, and send the new result.
[0190] - Multiple Reader Paging Flag: This field indicates that the paging message may be sent by multiple readers. This helps the A-loT device recognize that it might receive paging messages from different readers.
[0191] - Reader Group ID: This field indicates a group of readers that may send the paging message. The network can use this field to trigger all readers belonging to a specific group.R. 418040
[0192] - 20 -
[0193] - Priority: This field indicates the priority level of the paging message. For example, in a command use case, the command could have low, medium, or high priority.
[0194] - Duplication Avoidance Information: This field indicates information used to avoid duplicate responses to a paging message or to avoid the repeated transmission of identical paging messages. This information can be an ID, address, index, counter, or any other type of data suitable for identifying duplicate messages.
[0195] - Repeated Paging Message Flag: This field indicates whether the paging message is a retransmission. This occurs when a previous paging message has not received a response from the A-loT device(s). This flag helps readers and A-loT devices avoid duplicate responses.
[0196] - Initial Paging Message Flag: This field indicates whether the paging message is the first paging attempt for a particular service, use case, or transaction. This information helps readers and A-loT devices avoid duplicate responses and determine appropriate actions upon receiving the paging message.
[0197] According to a first example, the paging message comprises at least an identification information of the wireless device (device ID), a random access type information (random access type), a contention information (contention free access flag), an access attempt information (number of trials to access the channel), and a resource information (resource index). Here, the paging message may also define the type of random access and whether the wireless device should start a random access procedure after paging or directly start data transmission using a set of resources which are indicated in the paging message.
[0198] According to a second example, the paging message comprises at least an identification information of the wireless device (device ID), a content trigger information for performing measurements by the wireless device (measurement trigger) and for updating measurements (refreshing measurement flag), and a content type information (type of measurement). Here, the paging message may also trigger relevant measurements in the wireless device. The wireless device should also send its measurements such as energy status, remaining packets in the buffer, message size, etc. to the radio node.R. 418040
[0199] - 21 -
[0200] According to a third example, the paging message comprises at least an identification information of the wireless device (device ID) or a group identification information (group ID) or a zone identification information (zone ID), an identification of the radio nodes transmitting the paging message (group ID for radio nodes). Here, a core net node may page a set of wireless devices by sending the paging message not only to one radio node but a set of radio nodes. In this case, the paging message can trigger a set of radio nodes to forward the paging message to a one or set of wireless devices. In this case, a wireless device can also recognize that it may receive the same paging message from different radio nodes.
[0201] According to a fourth example, the paging message comprises at least an identification information of the wireless device (device ID), an acknowledgement information (enable / disable acknowledgement for radio node to wireless device transmission). Here, the paging message may enable acknowledgement messages in the wireless device for radio node to wireless device transmissions.
[0202] According to a fifth example, the paging message comprises at least a zone identification information (zone ID) or a group identification information of a group of wireless devices (group ID), and a priority information regarding a priority of the paging message (priority). Here, the paging message may trigger all wireless devices in a zone or group to transmit their messages and consider all configurations for the indicated priority level. The wireless devices may use preconfigured resource depending on the indicated priority levels.
[0203] According to a fifth example, the paging message comprises at least a zone identification information (zone ID) or a group identification information of a group of wireless devices (group ID), and an acknowledgement information (enable / disable acknowledgement for radio node to wireless device transmission). Here, the paging message may trigger all wireless devices in a zone or group to transmit ACK messages upon reception of each message from the radio node.
[0204] The A-loT device(s) 20a, 20b, 20c are adapted to receive the transmitted paging message. The A-loT device(s) 20a, 20b, 20c may be further adapted to respond to the received paging message. A response to the received paging messageR. 418040
[0205] - 22 -
[0206] may comprise a transmission of random access preamble. Alternatively, a response to the received paging message may also comprise a transmission of data to the base station 16 and / or the user equipment 18.
[0207] Fig. 2 schematically illustrates methods according to embodiments of the invention.
[0208] Fig. 2A schematically illustrates a method 100 for transmitting a paging message to a wireless device, preferably an ambient Internet of Things, A-loT, device of a communication network according to the first aspect of the invention. The wireless communication system may be the wireless communication system 10 according to Fig. 1.
[0209] The method 100 comprises a step 110 of
[0210] providing, by a radio node of the communication network, or, receiving, by the radio node, from a core network node
[0211] a paging information regarding a wireless device, preferably an A-loT device, to be paged.
[0212] The method 100 comprises a step 120 of, based on the provided paging information, transmitting, by the radio node, a paging message to the wireless device, preferably the A-loT device, wherein the paging message contains an identification information of the wireless device, preferably of the A-loT device, to be paged, and
[0213] at least a further information selected from a group comprising information regarding
[0214] o a transmission of data to be transmitted from the wireless device to the radio node,
[0215] o a channel access of the wireless device and / or an allocation of resources for the wireless device,
[0216] o avoidance of message duplication,
[0217] o geographical and / or application related identification information, o a group of radio nodes paging the wireless device.R. 418040
[0218] - 23 -
[0219] Fig. 2B schematically illustrates a method 200 for receiving a paging message by a wireless device, preferably an A-loT device, of a communication network, e.g., the communication network 10 of Fig. 1.
[0220] The method 200 comprises a step 210 of receiving, by the wireless device, preferably the A-loT device, a paging message from a radio node of the communication network, wherein the paging message contains
[0221] an identification information of the wireless device, preferably of the A-loT device, and
[0222] at least a further information selected from a group comprising information regarding
[0223] o a transmission of data to be transmitted from the wireless device to the radio node,
[0224] o a channel access of the wireless device and / or an allocation of resources for the wireless device,
[0225] o avoidance of message duplication,
[0226] o geographical and / or application related identification information, o a group of radio nodes paging the wireless device.
[0227] Fig. 2C schematically illustrates a method 300 of operating a communication system according to a further aspect of the invention. Here, the communication system comprises at least one radio node, preferably a base station, and at least one A-loT device.
[0228] The method 300 of operating the communication system 10 comprises the methods 100, 200 according to the first and the second aspect.
[0229] The method 300 comprises a step 310 corresponding to step 110 of the method 100 of
[0230] providing, by a radio node of the communication network, or, receiving, by the radio node, from a core network node
[0231] a paging information regarding a wireless device, preferably an A-loT device, to be paged.
[0232] The method 300 comprises a step 320 corresponding to step 120 of the method 100 of, based on the provided paging information, transmitting, by the radio node,R. 418040
[0233] - 24 -
[0234] a paging message to the wireless device, preferably the A-loT device, wherein the paging message contains
[0235] an identification information of the wireless device, preferably of the A-loT device, to be paged, and
[0236] at least a further information selected from a group comprising information regarding
[0237] o a transmission of data to be transmitted from the wireless device to the radio node,
[0238] o a channel access of the wireless device and / or an allocation of resources for the wireless device,
[0239] o avoidance of message duplication,
[0240] o geographical and / or application related identification information, o a group of radio nodes paging the wireless device.
[0241] The method 300 comprises a step 330 corresponding to step 210 of the method 200 of receiving, by the wireless device, preferably the A-loT device, the paging message from the radio node of the communication network.
[0242] The method 300 may be performed by the communication system 10, specifically by the at least one radio node 16 and the at least one A-loT device 20a, 20b, 20c.
Claims
R. 418040- 25 -Claims1. A method (100) for transmitting a paging message to a wireless device (20;20a, 20b, 20c), preferably an ambient Internet of Things, A-loT, device (20; 20a, 20b, 20c), of a communication network (10), comprising:Providing (110), by a radio node (16, 18) of the communication network (10), or, receiving (110), by the radio node (16, 18), from a core network node (14) a paging information regarding a wireless device (20; 20a, 20b, 20c), preferably an A-loT device (20; 20a, 20b, 20c), to be paged; and Based on the provided paging information, transmitting (120), by the radio node (16, 18), a paging message to the wireless device (20; 20a, 20b, 20c), preferably the A-loT device (20; 20a, 20b, 20c), wherein the paging message containso an identification information of the wireless device (20; 20a, 20b, 20c), preferably of the A-loT device (20; 20a, 20b, 20c), to be paged, ando at least a further information selected from a group comprising information regarding■ a transmission of data to be transmitted from the wireless device (20; 20a, 20b, 20c) to the radio node (16, 18), ■ a channel access of the wireless device (20; 20a, 20b, 20c) and / or an allocation of resources for the wireless device (20; 20a, 20b, 20c),■ avoidance of message duplication,■ geographical and / or application related identification information,■ a group of radio nodes (16, 18) paging the wireless device (20; 20a, 20b, 20c).
2. The method (100) according to claim 1 , wherein the paging information is received, by the radio node (16, 18), from the core network node (14), and the received paging information contains the identification information and the at least one further information.R. 418040- 26 -3. The method (100) according to claim 1 , wherein the paging information is received, by the radio node (16, 18), from the core network node (14), and the method (100) further comprises:Determining, by the radio node (16, 18), the identification information and / or the at least one further information by modifying and / or supplementing the received paging information.
4. A method (200) for receiving a paging message by a wireless device (20;20a, 20b, 20c), preferably an ambient Internet of Things, A-loT, device (20; 20a, 20b, 20c), of a communication network (10), comprising:Receiving (210), by the wireless device (20; 20a, 20b, 20c), preferably the A-loT device (20; 20a, 20b, 20c), a paging message from a radio node (16, 18) of the communication network (10), wherein the paging message containso an identification information of the wireless device (20; 20a, 20b, 20c), preferably of the A-loT device (20; 20a, 20b, 20c), and o at least a further information selected from a group comprising information regarding■ a transmission of data to be transmitted from the wireless device (20; 20a, 20b, 20c) to the radio node (16, 18), ■ a channel access of the wireless device (20; 20a, 20b, 20c) and / or an allocation of resources for the wireless device (20; 20a, 20b, 20c),■ avoidance of message duplication,■ geographical and / or application related identification information,■ a group of radio nodes (16, 18) paging the wireless device (20; 20a, 20b, 20c).
5. The method(s) (100, 200) according to one of the preceding claims, further comprising:Transmitting, by the wireless device (20; 20a, 20b, 20c), and / or receiving, by the radio node (16, 18), a message in response to the paging message, wherein the messageo is part of a random access procedure of the wireless device (20;20a, 20b, 20c), orR. 418040- 27 -o contains data, specifically measurements generated by the wireless device (20; 20a, 20b, 20c).
6. The method(s) (100, 200) according to one of the preceding claims, wherein the information regarding a transmission of data to be transmitted from the wireless device (20; 20a, 20b, 20c) to the radio node (16, 18) represents at least one of:a transmission type information indicating whether data shall be transmitted, by the wireless device (20; 20a, 20b, 20c), once or periodically,a periodicity information indicating a periodicity at which the data shall be transmitted by the wireless device (20; 20a, 20b, 20c),a transmission duration information indicating a duration for which the data shall be transmitted by the wireless device (20; 20a, 20b, 20c) or a number of data transmissions by the wireless device (20; 20a, 20b, 20c), a content type information indicating a type of content to be included in the data transmissions,a content trigger information indicating a content to be generated and / or updated, specifically by performing measurements, by the wireless device (20; 20a, 20b, 20c) for the data transmission,a failure information indicating a failed transmission of a data packet or of at least one data unit of a data packet transmitted by the wireless device (20; 20a, 20b, 20c).
7. The method(s) (100, 200) according to one of the preceding claims, wherein the information regarding a channel access of the wireless device (20; 20a, 20b, 20c) and / or an allocation of resources for the wireless device (20; 20a, 20b, 20c) represents at least one of:a contention information indicating whether a random access procedure to be performed, by the wireless device (20; 20a, 20b, 20c), subsequently to the reception of the paging message is contention-based or contention- free,a random access type information indicating a type of a random access procedure to be performed, by the wireless device (20; 20a, 20b, 20c), subsequently to the reception of the paging message,R. 418040- 28 -an access attempt information indicating a maximum number of unsuccessful attempts to access a random channel, by the wireless device (20; 20a, 20b, 20c), subsequently to the reception of the paging message,a resource information indicating an allocation of resources to the wireless device (20; 20a, 20b, 20c) for a transmission of data, wherein the resource information preferably comprises a resource indication in time and / or frequency,an acknowledgement information indicating whether reception of transmitted data shall be acknowledged by the wireless device (20; 20a, 20b, 20c),a failure information indicating a failed transmission of a random access message transmitted by the wireless device (20; 20a, 20b, 20c).
8. The method(s) (100, 200) according to one of the preceding claims, wherein the information regarding avoidance of message duplication represents at least one of:an information indicating that the transmitted paging message will not be duplicated or a response to the transmitted paging message shall not be duplicated,a retransmission information indicating that the transmitted paging message is a retransmission,a first paging information indicating that the transmitted paging is a first paging message for a specific application at least partially performable or performed by the wireless device (20; 20a, 20b, 20c), or for a use case the paging message is associated with.
9. The method(s) (100, 200) according to one of the preceding claims, wherein the information regarding geographical and / or application related identification information represents at least one of:an application identification information of an application at least partially performable or performed by the wireless device,a transaction identification information of a transaction of an application comprising multiple transactions,a use case information of a use case the paging message is associated with,R. 418040- 29 -a group identification information of a group of wireless devices (20; 20a, 20b, 20c) which the wireless device (20; 20a, 20b, 20c) is assigned to, a zone identification information of a spatial zone the wireless devices (20; 20a, 20b, 20c) is located in.
10. The method(s) (100, 200) according to one of the preceding claims, wherein the information regarding a group of radio nodes (16, 18) paging the wireless device (20; 20a, 20b, 20c) represents at least one of:an identification information of the radio node (16, 18) transmitting the paging message,a group identification information of a group of radio nodes (16, 18) paging the wireless device (20; 20a, 20b, 20c),a group paging information indicating that the same paging message is transmitted to the wireless device (20; 20a, 20b, 20c) by a group of radio nodes (16, 18).
11. The method(s) (100, 200) according to one of the preceding claims, wherein the paging message further contains an identification information of the radio node (16, 18) transmitting the paging message to the wireless device (20; 20a, 20b, 20c).
12. A node (16, 18) of a communication network (10) adapted to execute the method (100) according to one of claims 1 to 11.
13. A wireless device (20; 20a, 20b, 20c), preferably an ambient Internet of Things, A-loT, device (20; 20a, 20b, 20c), of a communication network (10) adapted to execute the method (200) according to one of claims 4 to 11.
14. A computer program comprising machine-readable instructions to cause the node (16, 18) according to claim 12 to execute the method (100) according to one of claims 1 to 11 , and / orthe wireless device (20; 20a, 20b, 20c) according to claim 13 to execute the method (200) according to one of claims 4 to 11.
15. A non-transitory computer readable medium having stored thereon the computer program according to claim 14.R. 418040- 30 -16. A paging message to be transmitted from a radio node (16, 18) of a communication network (10) to a wireless device (20; 20a, 20b, 20c), preferably an ambient Internet of Things, A-loT, device (20; 20a, 20b, 20c), of the communication network (10), wherein the paging message comprises a first data field representing an identification information of the wireless device (20; 20a, 20b, 20c), preferably of the A-loT device (20; 20a, 20b, 20c), to be paged, andat least a second data field representing a further information selected from a group comprising information regardingo a transmission of data to be transmitted from the wireless device (20; 20a, 20b, 20c) to the radio node (16, 18),o a channel access of the wireless device (20; 20a, 20b, 20c) and / or an allocation of resources for the wireless device (20; 20a, 20b, 20c),o avoidance of message duplication,o geographical and / or application related identification information, o a group of radio nodes (16, 18) paging the wireless device (20;20a, 20b, 20c).
17. A data carrier signal carrying the computer program of claim 14 or the paging message according to claim 16.