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WO2025212009A1 - Cwt, nœud de réseau pour planification de cwt et procédés associés - Google Patents

Cwt, nœud de réseau pour planification de cwt et procédés associés

Info

Publication number
WO2025212009A1
WO2025212009A1 PCT/SE2025/050275 SE2025050275W WO2025212009A1 WO 2025212009 A1 WO2025212009 A1 WO 2025212009A1 SE 2025050275 W SE2025050275 W SE 2025050275W WO 2025212009 A1 WO2025212009 A1 WO 2025212009A1
Authority
WO
WIPO (PCT)
Prior art keywords
cwt
cwts
cell
network node
activation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/SE2025/050275
Other languages
English (en)
Inventor
Saeedeh MOLOUDI
Chunhui Zhang
Andreas HÖGLUND
Sandeep Narayanan KADAN VEEDU
Johan Bergman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of WO2025212009A1 publication Critical patent/WO2025212009A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/20—Circuit arrangements or systems for wireless supply or distribution of electric power using microwaves or radio frequency waves
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present application relates to wireless communications, and in particular, to a network node for CWT scheduling.
  • Wireless loT devices are often battery powered and both the need to change battery and the battery lifetime may be concerns for many potential applications such as asset tracking or environmental/industrial sensors. For this reason, the wireless communications industry has been interested in so-called zero-energy (ZE) devices.
  • ZE devices refer to wireless loT devices that do not require battery replacement, and often harvest energy from the environment. In some use cases, such as monitoring the temperature of foodstuffs, the ZE devices may have small batteries that are disposable (e.g., organic, compostable batteries), rechargeable or have very limited capacity.
  • Ambient-IoT Ambient-IoT
  • SID study item description
  • RP-234058 Study on solutions for Ambient loT (Internet of Things) in NR, HS as Moderator, a considers the following set of Ambient loT devices:
  • the device • ⁇ a few hundred pW peak power consumption, has energy storage, initial sampling frequency offset (SFO) up to 10X ppm, DL and/or UL amplification in the device.
  • SFO initial sampling frequency offset
  • the device’s UL transmission may be generated internally by the device, or be backscattered on a carrier wave provided externally.
  • An Ambient loT (A-IoT) device can rely on backscattering or the device internal components may be able to generate the transmission without back-scattering.
  • Device 1 ⁇ 1 pW peak power consumption, has energy storage, initial sampling frequency offset (SFO) up to 10X ppm, neither DL nor UL amplification in the device.
  • SFO initial sampling frequency offset
  • the device s UL transmission is backscattered on a carrier wave provided externally.
  • Device 2b ⁇ a few hundred pW peak power consumption, has energy storage, initial sampling frequency offset (SFO) up to 10X ppm, DL and/or UL amplification in the device.
  • SFO initial sampling frequency offset
  • the device s UL transmission is generated internally by the device.
  • D2R device-to-reader link (“uplink”)
  • PRDCH physical reader-to-device channel
  • FIG. 1 shows an illustration of backscatering communication (bistatic setup).
  • the most well-known example of backscatering communication today is RFID.
  • the 3- node setup illustrated in Figure 1 is referred to as the ‘bistatic’ backscatering communication, whereas the 2-node case where a CWT and a reader are located in the same node is referred to as ‘monostatic’ backscatering communication.
  • the SID considers two different connectivity topologies: Topology 1 where a base station (BS) communicates directly with the device, and Topology 2 where a base station communicates with the device via an intermediate New Radio (NR) user equipment (UE).
  • the CWT may be inside or outside of the connectivity topology, i.e., the CWT may coincide with one of the nodes in the connectivity topology or be a separate node outside the connectivity topology.
  • a method implemented in a network node serving a first cell includes determining at least one CWTs on activation/deactivation pattern for carrier wave transmission, the at least one CWTs being associated with the first cell, among which a first CWT operates at frequency fl.
  • the method further includes transmitting signaling to the at least one CWTs about the activation/deactivation pattern determination.
  • the method further includes measuring CWT interference.
  • a further embodiment includes deciding another operating frequency when determining the activation/deactivation pattern for the CWTs.
  • the network node is acting as a CWT
  • the transmitting signaling to the first CWT associated with the first cell is a message internally transmitted within the network node, and the network node performs CW transmission when itself is activated for CW transmission.
  • the network node acts as a reader of UL signal from a A-IoT device which is triggered by receiving CW transmission from an activated CWT.
  • a method implemented in a CWT associated with a first cell served by a network node includes receiving signaling from the network node about activation/deactivation pattern for the CWT; and when it is activated, performing carrier wave transmission according to the activation/deactivation pattern.
  • a method implemented in a network node serving a second cell includes receiving signaling from a neighboring network node about activation/deactivation pattern for the one or more CWTs associated with the second cell for carrier wave transmission; and transmitting signaling to the one or more CWTs about the activation/deactivation pattern.
  • a carrier wave transmiter including processing circuitry and power supply circuitry.
  • the processing circuitry is configured to perform any of the methods embodiments performed by a network node described in this present disclosure.
  • Figure 3 shows a scenario where downlink transmissions coexist at a victim A-IoT device when CWT is outside the connectivity topology.
  • Figure 4 illustrates an example of scheduling groups of CWTs for transmitting RF EH CW and BKS CW according to some embodiments of the disclosure.
  • Figure 5 illustrates an example of activate/deactivate multiple CWTs in a time order according to some embodiments of the disclosure.
  • Figure 6 shows methods for a network node controlling CWTs’ scheduling by determining their activation/deactivation pattern according to some embodiments of the disclosure.
  • Figure 7 shows a method for a CWT controlled by its associated network node according to some embodiments of the disclosure.
  • Figure 8 shows a method for a network node coordinating with a neighboring node for scheduling associated CWTs according to some embodiments of the disclosure.
  • Figure 9 shows an illustrative structure of a network node according to some embodiments of the disclosure.
  • FIG. 2 shows UL coexisting overview for CWT outside the topology.
  • Figure 3 shows DL coexisting overview for CWT outside the topology.
  • Figure 4 shows CW signal power spectrum in frequency domain.
  • the CW signals from CWT nodes transmitting at both f2 and f3 which is different from both f2 and fl can potentially interfere with the A-IoT device receiving at fl as the A-IoT device has only RF ED (envelop detector) which is a nonlinear receiving device.
  • RF ED envelope detector
  • the fl and f2 has equal spacing to that of f2 and 13, there is 3 rd intermodulated product (IM3) which can be generated in the receiving A-IoT device and overlapping with the DL received signal.
  • IM3 intermodulated product
  • Passive A-IoT devices receives the signals transmitted by CWT for two main purposes:
  • the BS/reader can activate (ON), deactivate (OFF), and schedule the CWTs for transmitting signal suitable either for RF energy harvesting or backscattering.
  • a BS associated to several CWTs can activate a group of CWTs for transmitting RF-EH CW and other group for transmitting BKS CW. This activation can be either in a periodic way or based on any time-based pattern.
  • the CWT group size and the number of the groups (N and n, respectively) can be based on:
  • This solution can also control the UL transmission load (considering the high density of the A-IoT devices it can be also an important issue), since only the A-IoT devices in coverage of the CWT that transmits BKS will transmit in UL.
  • Figure 4 also shows an example of CWT scheduling for transmitting RF EH CW and BKS CW signals.
  • the controlling BS can also configure the CWTs to transmit RF EH CW or BKS CW in different bands (e.g., UL and DL).
  • Embodiment group 2 scheduling the RF EH CW transmission
  • time points and t 2 can be determined based on the following parameters:
  • the time that the service is needed (e.g., the inventory can be done every a few hours) .
  • distance between t 2 and t x could be set larger.
  • the time that the service is needed e.g., the inventory can be done every a few hours.
  • each of the CWTs can receive a binary sequence, in which each of the bits shows if the corresponding CWT should be ON or OFF. (e.g., 1 shows ON and 0 shows OFF).
  • the controlling BS/reader can base these decisions either on assistance information signaled from the A-IoT devices (e.g., as a LI control field or as a MAC control element) to the BS/reader or on trial-and-error-based approaches where the BS/reader adapts the RF EH CW transmission and detects whether this affects the success rate in its attempts to communicate with the A-IoT devices.
  • assistance information signaled from the A-IoT devices e.g., as a LI control field or as a MAC control element
  • Embodiment group 3 scheduling the BKS CW transmission
  • Some A-IoT devices rely on CWT backscattering for transmitting in PDRCH. Therefore, considering high density of the devices, for controlling the transmission in PDRCH (i.e., UL traffic), the BS/reader can consider scheduling for activating and deactivating the associated CWTs for BKS CW transmission.
  • the NW can divide the associated CWTs into several groups.
  • the NW can schedule/activate the CWTs in a group manner for transmitting BKS CW signals.
  • the CWTs group size and the number of the groups can be selected based on:
  • each of the CWTs can receive a binary sequence, in which each of the bits shows if the CWT should be ON or OFF (e.g., 1 shows ON and 0 shows OFF).
  • different frequency shifts for backscattering can be considered for different groups.
  • the BS/NW by knowing the location of the active CWTs and their coverage area, can simply increase the cell granularity which enable positioning with higher accuracy than cell-ID based positioning.
  • Embodiment group 4 NW coordination between CWTs
  • the neighboring CWTs can be scheduled in a way that when one is in ON mode the other one is not transmitting (e.g., is in OFF mode).
  • the BS that acting as CWT can be in ON mode, but a CWT belonging to another BS that receives UL signaling can be OFF. This can reduce the interference in the receiver side caused by CW.
  • the BS which receives the backscattered UL transmission would be in control and signal to another BS acting as CWT when to transmit the CW over Xn interface (i.e. , a new CWT control message over Xn introduced).
  • FIG. 5 shows an illustration of CWT scheduling.
  • Those 4 CWTs can belong to one or more BS. If they belong to one BS, the BS can schedule those CWTs in a time order. If they belong to 2 BSs, respectively, the 2 BSs can coordinate to schedule those CWTs in a time order.
  • the ON/OFF period and/or durations of the CWTs can be determined based on the following parameters:
  • the triggering of CWT transmission and RF harvesting transmission by network nodes is connected to the scheduling of downlink and uplink transmissions is the following manner.
  • Uplink transmissions are always preceded by a RF energy harvesting transmission, such that the BS sends a RF harvesting command to the RF harvesting node at least a time period (t2-ti) prior to the downlink transmission occasion of control information associated to the uplink transmission. And then, the BS sends the control information to the A-IoT device at time point t2, where (t2-ti) is determined as described above, e.g., the device’s expected harvesting time for the procedure. The BS sends a CWT command to the CWT to trigger a CW transmission at time point t2, at which time point the BS switches on the receiver to receive the backscattered transmission from the device.
  • the hopping patern of the CWT tones is a function of one or more of:
  • An Ambient Internet of Things (loT) device may be a device for use in one or more application domains, these domains comprising, but not limited to, city wearable technology, extended industrial application and healthcare.
  • loT device are a device which is or which is embedded in: a connected refrigerator or freezer, a TV, a connected lighting device, an electricity meter, a robot vacuum cleaner, a voice controlled smart speaker, a home security camera, a motion detector, a thermostat, a smoke detector, a door/window sensor, a flood/moisture sensor, an electrical door lock, a connected doorbell, an air conditioning system like a heat pump, an autonomous vehicle, a surveillance system, a weather monitoring device, a vehicle parking monitoring device, an electric vehicle charging station, a smart watch, a fitness tracker, a wearable for tactile augmentation or sensory enhancement, a water sprinkler, an animal- or item-tracking device, a sensor for monitoring a plant or animal, an industrial robot, an Unmanned A
  • a UE in the forms of an A-IoT device may represent a machine or other device that performs monitoring and/or measurements, and transmits the results of such monitoring and/or measurements to another UE and/or a network node.
  • the device may in this case be an M2M device, which may in a 3GPP context be referred to as an MTC device.
  • the device may implement the 3GPP NB-IoT standard.
  • a device may represent a vehicle, such as a car, a bus, a truck, a ship and an airplane, or other equipment that is capable of monitoring and/or reporting on its operational status or other functions associated with its operation.
  • the network node can obtain measured interference from neighboring CWTs. Furtherly, the network can determine another operating frequency f2 for the first CWT when determining the activation/deactivation pattern.
  • a method by a CWT being out of the topology is also provided.
  • the CWT receives activation/deactivation pattern for carrier wave transmission, so that unnecessary wakeup would be avoided for the overall energy saving. Further, if interference measurement is also considered for activation/deactivation pattern determination, interference would also be mitigated by switching on/off only necessary CWTs.
  • network node refers to equipment capable, configured, arranged and/or operable to communicate directly or indirectly with a UE and/or with other network nodes or equipment, in a telecommunication network.
  • network nodes include, but are not limited to, access points (APs) (e.g., radio access points), base stations (BSs) (e.g., radio base stations, Node Bs, evolved Node Bs (eNBs) and NR NodeBs (gNBs)), O-RAN nodes or components of an O-RAN node (e.g., O-RU, O-DU, O-CU).
  • APs access points
  • BSs base stations
  • eNBs evolved Node Bs
  • gNBs NR NodeBs
  • O-RAN nodes or components of an O-RAN node e.g., O-RU, O-DU, O-CU.
  • Base stations may be categorized based on the amount of coverage they provide (or, stated differently, their transmit power level) and so, depending on the provided amount of coverage, may be referred to as femto base stations, pico base stations, micro base stations, or macro base stations.
  • a base station may be a relay node or a relay donor node controlling a relay.
  • a network node may also include one or more (or all) parts of a distributed radio base station such as centralized digital units, distributed units (e.g., in an O-RAN access node) and/or remote radio units (RRUs), sometimes referred to as Remote Radio Heads (RRHs). Such remote radio units may or may not be integrated with an antenna as an antenna integrated radio.
  • Parts of a distributed radio base station may also be referred to as nodes in a distributed antenna system (DAS).
  • DAS distributed antenna system
  • the CWT In a case of a CWT being inside of the connectivity topology, the CWT is located in a network node, so that the network node can acting as CW transmission performer with necessary antennas. In meanwhile, it is also capable of processing interference measurement, calculating of activation/deactivation pattern, depending on e.g., neighboring CWTs’ deployment, it’s own DL and UL traffic needs.
  • FIG. 9 shows a network node QQ300 in accordance with some embodiments.
  • the network node QQ300 includes a processing circuitry QQ302, a memory QQ304, a communication interface QQ306, and a power source QQ308.
  • the network node QQ300 may be composed of multiple physically separate components (e.g., aNodeB component and aRNC component, or a BTS component and a BSC component, etc.), which may each have their own respective components.
  • the processing circuitry QQ302 may comprise a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application-specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software and/or encoded logic operable to provide, either alone or in conjunction with other network node QQ300 components, such as the memory QQ304, to provide network node QQ300 functionality.
  • the processing circuitry QQ302 includes a system on a chip (SOC). In some embodiments, the processing circuitry QQ302 includes one or more of radio frequency (RF) transceiver circuitry QQ312 and baseband processing circuitry QQ314. In some embodiments, the radio frequency (RF) transceiver circuitry QQ312 and the baseband processing circuitry QQ314 may be on separate chips (or sets of chips), boards, or units, such as radio units and digital units. In alternative embodiments, part or all of RF transceiver circuitry QQ312 and baseband processing circuitry QQ314 may be on the same chip or set of chips, boards, or units.
  • SOC system on a chip
  • the processing circuitry QQ302 includes one or more of radio frequency (RF) transceiver circuitry QQ312 and baseband processing circuitry QQ314.
  • the radio frequency (RF) transceiver circuitry QQ312 and the baseband processing circuitry QQ314 may be on separate chips (or sets of chips
  • the memory QQ304 may comprise any form of volatile or non-volatile computer- readable memory including, without limitation, persistent storage, solid-state memory, remotely mounted memory, magnetic media, optical media, random access memory (RAM), read-only memory (ROM), mass storage media (for example, a hard disk), removable storage media, and/or any other volatile or non-volatile, non-transitory device-readable and/or computer-executable memory devices that store information, data, and/or instructions that may be used by the processing circuitry QQ302.
  • volatile or non-volatile computer-readable memory including, without limitation, persistent storage, solid-state memory, remotely mounted memory, magnetic media, optical media, random access memory (RAM), read-only memory (ROM), mass storage media (for example, a hard disk), removable storage media, and/or any other volatile or non-volatile, non-transitory device-readable and/or computer-executable memory devices that store information, data, and/or instructions that may be used by the processing circuitry QQ302.
  • the memory QQ304 may store any suitable instructions, data, or information, including a computer program, software, an application including one or more of logic, rules, code, tables, and/or other instructions capable of being executed by the processing circuitry QQ302 and utilized by the network node QQ300.
  • the memory QQ304 may be used to store any calculations made by the processing circuitry QQ302 and/or any data received via the communication interface QQ306.
  • the processing circuitry QQ302 and memory QQ304 is integrated.
  • the radio front-end circuitry may be configured to condition signals communicated between antenna QQ310 and processing circuitry QQ302.
  • the radio front-end circuitry QQ318 may receive digital data that is to be sent out to other network nodes or UEs via a wireless connection.
  • the radio front-end circuitry QQ318 may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters using a combination of filters QQ320 and/or amplifiers QQ322.
  • the radio signal may then be transmitted via the antenna QQ310.
  • the antenna QQ310 may collect radio signals which are then converted into digital data by the radio front-end circuitry QQ318.
  • the digital data may be passed to the processing circuitry QQ302.
  • computing devices may comprise multiple different physical components that make up a single illustrated component, and functionality may be partitioned between separate components.
  • a communication interface may be configured to include any of the components described herein, and/or the functionality of the components may be partitioned between the processing circuitry and the communication interface.
  • non-computationally intensive functions of any of such components may be implemented in software or firmware and computationally intensive functions may be implemented in hardware.
  • processing circuitry executing instructions stored on in memory, which in certain embodiments may be a computer program product in the form of a non-transitory computer- readable storage medium.
  • some or all of the functionality may be provided by the processing circuitry without executing instructions stored on a separate or discrete device-readable storage medium, such as in a hard-wired manner.
  • the processing circuitry can be configured to perform the described functionality. The benefits provided by such functionality are not limited to the processing circuitry alone or to other components of the computing device, but are enjoyed by the computing device as a whole, and/or by end users and a wireless network generally.
  • RF EH CW transmission RF signal energy harvesting
  • BKS CW transmission Use of the signal for backscattering
  • one or more of the signals are for at least one of: activate (ON), deactivate (OFF), and schedule the CWT for transmitting signal suitable either for RF energy harvesting or backscattering.
  • CWT can be configured (by BS or designed by deployment) to transmit either only RF EH CW or only BKS CW, or both.
  • RF EH CW is required to power the receiver of device type 1 for downlink reception
  • BKS CW is required for uplink transmission from backscattering devices (type 1 and 2a)
  • both RF EH CW and BKS CW in combination may be needed for an uplink transmission for which control information is required (e.g., scheduling information).
  • the RF EH CWTs Being scheduled or activated by a network node/BS so the RF EH CWTs start transmitting only a few time slots (or in general any time unit) before the DL transmission starting from time t and ending at time t 2 . (Being in ON mode from time to time t 2 ).
  • the device s capacitor characteristics: including the capacity, the charging rate, ... , or the smallest energy storage size required to be supported by devices.
  • the BS can configure the ON/OFF periods for RF EH CWTs, which is like having duty cycle for RF EH CWTs.
  • the ON/OFF duration can be selected based on the following parameters:
  • the device s capacitor characteristics: including the capacity, the charging rate, ... , or the smallest energy storage size required to be supported by devices.
  • each of the CWTs can receive a binary sequence, in which each of the bits shows if the CWT should be ON or OFF. (e.g., 1 shows ON and 0 shows OFF).
  • the RF EH CWT can be preconfigured for having the periodic transmission (without BS control/configurations). Then, the BS/reader can transmit the DL transmission a few slots/frames (any time metric) after the RF EH CW transmissions. For CWT outside of the topology, the ON/OFF cycle of the RF EH CWTs can be estimated by BS/reader. 9. The method of any of embodiments 4 to 8, wherein the RF EH CW transmission is adapted depending on whether devices are in actual need of the RF EH CW transmission. In some cases, devices may be able to be adequately served by some other energy source that they can harvest for energy, for example some other RF signal or light.
  • the RF EH CW transmission can be adapted again by switching it on or increasing its power.
  • the controlling BS/reader can base these decisions either on assistance information signaled from the devices (e.g., as a LI control field or as a MAC control element) to the BS/reader or on trial-and-error-based approaches (where the BS/reader adapts the RF EH CW transmission and detects whether this affects the success rate in its attempts to communicate with the devices).
  • RF EH CW transmission RF signal energy harvesting
  • BKS CW transmission Use of the signal for backscattering
  • the BS/reader (both in the case when the CWTs are inside the topology and in the case when the CWTs are outside of the topology) can activate (ON), deactivate (OFF), and schedule the CWT for transmitting signal suitable either for RF energy harvesting or backscattering.
  • CWT can be configured (by BS or designed by deployment) to transmit either only RF EH CW or only BKS CW, or both.
  • RF EH CW is required to power the receiver of device type 1 for downlink reception
  • BKS CW is required for uplink transmission from backscattering devices (type 1 and 2a)
  • both RF EH CW and BKS CW in combination may be needed for an uplink transmission for which control information is required (e.g., scheduling information).
  • a BS associated to several CWTs can activate a group of CWTs for transmitting RF-EH CW and other group for transmitting BKS CW. This activation can be either in a periodic way or based on any time-based pattern.
  • the CWT group size and the number of the groups (N and n, respectively) can be based on:
  • the size of the DL packet or rather the expected device reception time may not need to fully charge the capacitors
  • the device s capacitor characteristics: including the capacity, the charging rate, ... , or the smallest energy storage size required to be supported by devices.
  • the device s capacitor characteristics: including the capacity, the charging rate, ... , or the smallest energy storage size required to be supported by devices.
  • t 2 the start of the downlink transmission and reception time for the device.
  • each of the CWTs can receive a binary sequence, in which each of the bits shows if the CWT should be ON or OFF. (e.g., 1 shows ON and 0 shows OFF).
  • a method performed by a network node for coordinating between a reader (either BS or intermediate node), network node (BS) and CWT for reducing the overall NW power consumptions and the interference caused by CWT transmission comprising: considering high density of the devices, for controlling the transmission in PDRCH (UL traffic), the BS/reader can consider scheduling for activating and deactivating the CWTs for BKS CW transmission; wherein A-IoT devices rely on CWT backscattering for transmitting in PDRCH.
  • each of the CWTs can receive a binary sequence, in which each of the bits shows if the CWT should be ON or OFF. (e.g., 1 shows ON and 0 shows OFF).
  • the method of any of embodiments 28 to 31, wherein different frequency shifts (for backs cattering) can be considered for different groups.
  • a user equipment, A-IoT, or CwT for coordinating between a reader (either BS or intermediate node), network node (BS) and CWT for reducing the overall NW power consumptions and the interference caused by CWT transmission, comprising: an antenna configured to send and receive wireless signals; radio front-end circuitry connected to the antenna and to processing circuitry, and configured to condition signals communicated between the antenna and the processing circuitry; the processing circuitry being configured to perform any of the steps of any of the Group A embodiments; an input interface connected to the processing circuitry and configured to allow input of information into the UE to be processed by the processing circuitry; an output interface connected to the processing circuitry and configured to output information from the UE that has been processed by the processing circuitry; and a battery connected to the processing circuitry and configured to supply power to the UE.
  • CCCH SDU Common Control Channel
  • SDU CDMA Code Division Multiplex Access
  • CGI Cell Global Identity

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Abstract

Des modes de réalisation de la présente divulgation concernent la planification de CWT par un nœud de réseau. Un nœud de réseau détermine un motif d'activation/de désactivation pour une transmission d'ondes porteuses pour au moins un CWTs, pour économiser la consommation d'énergie globale du réseau. La mesure d'interférence de CWTs peut être considérée lors de la détermination du motif de planification.
PCT/SE2025/050275 2024-04-04 2025-03-28 Cwt, nœud de réseau pour planification de cwt et procédés associés Pending WO2025212009A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
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WO2024011499A1 (fr) * 2022-07-14 2024-01-18 Qualcomm Incorporated Techniques pour l'alimentation de dispositifs passifs à l'aide de multiples points d'émission/réception
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US20230141393A1 (en) * 2021-11-09 2023-05-11 Qualcomm Incorporated Harvesting energy from clusters of nodes
WO2024011499A1 (fr) * 2022-07-14 2024-01-18 Qualcomm Incorporated Techniques pour l'alimentation de dispositifs passifs à l'aide de multiples points d'émission/réception
WO2024239666A1 (fr) * 2024-01-05 2024-11-28 Lenovo (Beijing) Limited Transmission d'ondes porteuses

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