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WO2025166743A1 - Dispositifs et procédés de communication - Google Patents

Dispositifs et procédés de communication

Info

Publication number
WO2025166743A1
WO2025166743A1 PCT/CN2024/076980 CN2024076980W WO2025166743A1 WO 2025166743 A1 WO2025166743 A1 WO 2025166743A1 CN 2024076980 W CN2024076980 W CN 2024076980W WO 2025166743 A1 WO2025166743 A1 WO 2025166743A1
Authority
WO
WIPO (PCT)
Prior art keywords
mode
transmission
target
topology
switching
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/CN2024/076980
Other languages
English (en)
Inventor
Lin Liang
Gang Wang
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to PCT/CN2024/076980 priority Critical patent/WO2025166743A1/fr
Publication of WO2025166743A1 publication Critical patent/WO2025166743A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/0277—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof according to available power supply, e.g. switching off when a low battery condition is detected

Definitions

  • Example embodiments of the present disclosure generally relate to the field of communication techniques and in particular, to devices and methods for ambient internet of thing (IoT) mode switching.
  • IoT ambient internet of thing
  • IoT Internet of Things
  • IoT Internet of Things
  • devices can transfer data to one another without human intervention.
  • the automation and digitalization of various industries open numbers of new markets requiring new IoT technologies of supporting battery-less devices with no energy storage capability or devices with energy storage that do not need to be replaced or recharged manually. It may consider devices being either battery-less or with limited energy storage capability (i.e., using a capacitor) and the energy is provided through the harvesting of radio waves, light, motion, heat, or any other power source that could be seen suitable.
  • the output power of energy harvester is typically from 1 ⁇ W to a few hundreds of ⁇ W.
  • Existing cellular devices may not work well with energy harvesting due to their peak power consumption of higher than 10mW.
  • An example type of application may be asset identification, which presently has to resort mainly to barcode and radio frequency identity (RFID) in most industries.
  • RFID radio frequency identity
  • the main advantage of these two technologies is the ultra-low complexity and small form factor of the tags.
  • the limited reading range of a few meters usually requires handheld scanning which leads to labor intensive and time-consuming operations, or RFID portals/gates which leads to costly deployments.
  • the lack of interference management scheme results in severe interference between RFID readers and capacity problems, especially in case of dense deployment. It is hard to support large-scale network with seamless coverage for RFID.
  • embodiments of the present disclosure provide a solution on ambient internet of thing (IoT) mode switching.
  • IoT internet of thing
  • a second device comprising: a processor, configured to cause the second device to: receive, from a first device, a transmission that is transmitted based on a target mode from a first mode and a second mode, wherein the first mode is a first operation mode and the second mode is a second operation mode that requires less power than the first operation mode, or wherein the first mode is a first signal generation mode and the second mode is a second signal generation mode which requires less power than the first signal generation mode.
  • a first device comprising: a processor, configured to cause the first device to: receive a first signal from a second device associated with a first topology; receive a second signal from a third device associated with a second topology; determine a target device from the second and third devices based on one of: priority information of the first and second topologies or an indication regarding the target device from a network device; and perform a transmission with the target device.
  • a communication method performed by a second device.
  • the method comprises: receiving, from a first device, a transmission that is transmitted based on a target mode from a first mode and a second mode, wherein the first mode is a first operation mode and the second mode is a second operation mode that requires less power than the first operation mode, or wherein the first mode is a first signal generation mode and the second mode is a second signal generation mode which requires less power than the first signal generation mode.
  • FIG. 1A and FIG. 1B illustrate example communication environments in which example embodiments of the present disclosure can be implemented, respectively;
  • FIG. 3 illustrates a signaling flow of topology switching in accordance with some embodiments of the present disclosure
  • FIG. 4 illustrates a flowchart of a method implemented at a first device, according to some example embodiments of the present disclosure
  • FIG. 5 illustrates a flowchart of a method implemented at a second device, according to some example embodiments of the present disclosure
  • FIG. 6 illustrates a flowchart of a method implemented at a first device, according to some example embodiments of the present disclosure.
  • FIG. 7 illustrates a simplified block diagram of an apparatus that is suitable for implementing example embodiments of the present disclosure.
  • terminal device refers to any device having wireless or wired communication capabilities.
  • the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, internet of things (IoT) devices, Ultra-reliable and Low Latency Communications (URLLC) devices, Internet of Everything (IoE) devices, machine type communication (MTC) devices, devices on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for Integrated Access and Backhaul (IAB) , Space borne vehicles or Air borne vehicles in Non-terrestrial networks (NTN) including Satellites and High Altitude Platforms (HAPs) encompassing Unmanned Aircraft Systems (UAS) , eXtended Reality (XR) devices including different types of realities such as Augmented Reality (AR) , Mixed Reality (MR) and Virtual Reality (VR) , the unmanned aerial vehicle (UAV)
  • UE user equipment
  • the ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple Subscriber Identity Module (SIM) as known as Multi-SIM.
  • SIM Subscriber Identity Module
  • the term “terminal device” can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
  • network device refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate.
  • a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , and the like.
  • NodeB Node B
  • eNodeB or eNB evolved NodeB
  • gNB next generation NodeB
  • TRP transmission reception point
  • RRU remote radio unit
  • RH radio head
  • RRH remote radio head
  • IAB node a low power node such as a fe
  • the terminal device or the network device may have Artificial intelligence (AI) or Machine learning capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • AI Artificial intelligence
  • Machine learning capability it generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • the terminal or the network device may work on several frequency ranges, e.g., FR1 (e.g., 450 MHz to 6000 MHz) , FR2 (e.g., 24.25GHz to 52.6GHz) , frequency band larger than 100 GHz as well as Tera Hertz (THz) . It can further work on licensed/unlicensed/shared spectrum.
  • FR1 e.g., 450 MHz to 6000 MHz
  • FR2 e.g., 24.25GHz to 52.6GHz
  • THz Tera Hertz
  • the terminal device may have more than one connection with the network devices under Multi-Radio Dual Connectivity (MR-DC) application scenario.
  • MR-DC Multi-Radio Dual Connectivity
  • the terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
  • the embodiments of the present disclosure may be performed in test equipment, e.g., signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
  • the terminal device may be connected with a first network device and a second network device.
  • One of the first network device and the second network device may be a master node and the other one may be a secondary node.
  • the first network device and the second network device may use different radio access technologies (RATs) .
  • the first network device may be a first RAT device and the second network device may be a second RAT device.
  • the first RAT device is eNB and the second RAT device is gNB.
  • Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device.
  • first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device.
  • information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device.
  • Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
  • the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’
  • the term ‘based on’ is to be read as ‘at least in part based on. ’
  • the term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’
  • the term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’
  • the terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
  • values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
  • the term “resource, ” “transmission resource, ” “uplink resource, ” or “downlink resource” may refer to any resource for performing a communication, such as a resource in time domain, a resource in frequency domain, a resource in space domain, a resource in code domain, or any other resource enabling a communication, and the like.
  • a resource in both frequency domain and time domain will be used as an example of a transmission resource for describing some example embodiments of the present disclosure. It is noted that example embodiments of the present disclosure are equally applicable to other resources in other domains.
  • ambient IoT device used herein is a 3GPP IoT device which is much smaller and cheaper compared to previous generations of IoT.
  • the ultimate ambient IoT energy source is that from radio waves.
  • Both Ambient IoT and Ambient computing rely upon energy harvesting as one of the key mechanisms for powering and enabling the technology.
  • Energy harvesting is the harnessing of the power in ambient radio waves to power tiny computers.
  • Ambient IoT device may have a new radio/air interface to a reader/node.
  • the new radio interface may be frame based or non-frame based. Deploying ambient IoT service on existing system could reduce the operation cost and quickly commercialize the new service.
  • an air interface design with minimized differences (where necessary) for Ambient IoT may enable the following devices: (1) ⁇ 1 ⁇ W peak power consumption, has energy storage, initial sampling frequency offset (SFO) up to 10X ppm, neither DL nor UL amplification in the device, the device’s UL transmission is backscattered on a carrier wave provided externally; and (2) ⁇ a few hundred ⁇ W peak power consumption1, has energy storage, initial sampling frequency offset (SFO) up to 10 X ppm, both DL and/or UL amplification in the device.
  • the device’s UL transmission may be generated internally by the device, or be backscattered on a carrier wave provided externally.
  • ⁇ a few hundred ⁇ W means WGs are not tasked with setting a particular value, and that it will be for WG discussions to determine if a presented design with corresponding power consumption satisfies the “ ⁇ a few hundred ⁇ W”requirement.
  • FIG. 1A and FIG. 1B illustrate schematic diagrams of example communication environments in which example embodiments of the present disclosure can be implemented, respectively.
  • a plurality of communication devices including a terminal device 110 and a network device 120, can communicate with each other.
  • the first device 110 may be an ambient IoT device/ambient IoT tag and the second device 120 may be a base station serving a third device 130 which is a UE.
  • the communication environment may include any suitable number of devices configured to implementing example embodiments of the present disclosure. Although not shown, it would be appreciated that one or more additional devices may be located in the cell, and one or more additional cells may be deployed in the communication environment. It is noted that although illustrated as a network device, the second device 120 may be another device than a network device. Although illustrated as a terminal device, the third device 130 may be other device than a terminal device.
  • some example embodiments are described with the third device 130 operating as a UE and the second device 120 operating as a base station.
  • operations described in connection with a terminal device may be implemented at a network device or other device, and operations described in connection with a network device may be implemented at a terminal device or other device.
  • a link from the second device 120 to the third device 130 is referred to as a downlink (DL)
  • a link from the third device 130 to the second device 120 is referred to as an uplink (UL)
  • the second device 120 is a transmitting (TX) device (or a transmitter)
  • the third device 130 is a receiving (RX) device (or a receiver)
  • the third device 130 is a TX device (or a transmitter) and the second device 120 is a RX device (or a receiver) .
  • the communications in the communication environments shown in FIG. 1A and FIG. 1B may conform to any suitable standards including, but not limited to, Global System for Mobile Communications (GSM) , Long Term Evolution (LTE) , LTE-Evolution, LTE-Advanced (LTE-A) , New Radio (NR) , Wideband Code Division Multiple Access (WCDMA) , Code Division Multiple Access (CDMA) , GSM EDGE Radio Access Network (GERAN) , Machine Type Communication (MTC) and the like.
  • GSM Global System for Mobile Communications
  • LTE Long Term Evolution
  • LTE-Evolution LTE-Advanced
  • NR New Radio
  • WCDMA Wideband Code Division Multiple Access
  • CDMA Code Division Multiple Access
  • GERAN GSM EDGE Radio Access Network
  • MTC Machine Type Communication
  • Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or the sixth generation (6G) networks.
  • FIG. 1B shows a second topology 100’ where the first device 110 (i.e., ambient IoT device) communicates bidirectionally with an intermediate node (i.e., the third device 130) between the first device 110 and the second device 120.
  • the intermediate node may be a relay, IAB node, UE, repeater, and the like. which is capable of Ambient IoT.
  • the intermediate node may transfer Ambient IoT data and/or signalling between the first device 110 and the second device 120.
  • the second topology 100’ may be deployed in a scenario where the first device 110 (i.e., ambient IoT device) and the second device 120 may be outdoor.
  • ambient IoT devices there may be different types of ambient IoT devices, including: a first type of device (i.e., Device A) which has no energy storage and no independent signal generation/amplification, i.e. backscattering transmission, a second type of device (i.e., Device B) which has energy storage but no independent signal generation, i.e. backscattering transmission, and a third type of device (i.e., Device C) which has energy storage and independent signal generation, i.e., active RF components for transmission.
  • a first type of device i.e., Device A
  • Device B which has energy storage but no independent signal generation
  • a third type of device i.e., Device C
  • use of stored energy can include amplification for reflected signals.
  • the first device 110 may be any of the first, second or third types of devices.
  • a limited energy storage can be different among implementations within Device B or implementations within Device C, and different between Device B and Device C. Such storage is expected to be order (s) of magnitude smaller than an NB-IoT device would typically include.
  • the power consumption target during transmitting/receiving is ⁇ 1 ⁇ W or ⁇ 10 ⁇ W.
  • the target during transmitting/receiving is such that: Device A power consumption ⁇ Device B power consumption ⁇ Device C power consumption; or Device A power consumption ⁇ Device B power consumption ⁇ Device C power consumption.
  • the device power consumption during transmitting/receiving for Device C is ⁇ 1 mW to ⁇ 10 mW.
  • the complexity target is to be comparable to UHF RFID ISO18000-6C (EPC C1G2) .
  • the target is such that: Device A complexity ⁇ Device B complexity ⁇ Device C complexity.
  • the complexity target is to be orders-of-magnitude lower than NB-IoT.
  • FIG. 2 illustrates a signaling flow 200 of mode switching in accordance with some embodiments of the present disclosure.
  • the signaling flow 200 will be discussed with reference to FIG. 1A and FIG. 1B, for example, by using the first device 110 and the second device 120.
  • the first operation mode and the second operation mode have at least one of: a common radio protocol, a common timing, a common frame structure, or a common waveform.
  • maximum transmission power, maximum transmission burst duration, maximum transmission coverage level of the first and second operation modes may be different.
  • at least one of the followings of the second operation mode is smaller than that of the first operation mode: a maximum transmission power, a maximum transmission burst duration, or a maximum transmission coverage level.
  • the first signal generation mode is to generate an active transmission signal
  • the second signal generation mode is to an external carrier wave to generate a backscattering transmission signal.
  • the sources of carrier waves for the signals generated by the first signal generation mode and the second signal generation mode may be different, i.e., internal or external.
  • the signals generated by the first signal generation mode and the second signal generation mode may be modulated in a same way, for example, both are on-off keying (OOK) modulated signals.
  • OOK on-off keying
  • the first device 110 may transmit the signal which is a backscattering transmission signal to the second device 120. In this way, it can be benefit for node’s interference cancelation detection. Further, when external carrier wave quality is not good, using internal generated carrier wave is benefit for received power at node.
  • the condition for switching from the second operation mode to the first operation mode is satisfied.
  • the other energy threshold may be the same as or different from the above-mentioned energy threshold.
  • the first device 110 may determine that the condition for switching from the second operation mode to the first operation mode is satisfied.
  • the other volume threshold may be the same as or different from the above-mentioned volume threshold.
  • the first device 110 may transmit (2015) a request for the switching to the second device 120. In other words, the first device 110 may request to the second device 120 to reduce its capability. After receiving (2015) the request from the first device 110, the second device 120 may transmit (2020) a response indicating an acknowledgment (ACK) of the request to the first device 110. After receiving (2020) the response from the second device 120, the first device 110 may perform (2025) the switching to the second operation mode.
  • the request may be a long time request.
  • the request may be a long time request that the first device 110 leaves out the first operation mode and works in the second operation mode until having a further switching command from the second device 120.
  • the request may be a short time request.
  • the request may be a short time request that the first device 110 works in the second operation mode for a time period and returns back to the first operation mode after the time period, and the time period is periodic or aperiodic.
  • the request is a one-shot request.
  • the request may be a one-shot request that the first device 110 works in the second operation mode for a current transmission burst only and returns back to the first operation mode for a subsequent transmission burst.
  • the second device 120 may transmit (2005) a first indication regarding a switching to the target mode (for example, the first operation mode or the second operation mode) to the first device 110.
  • the first device 110 may determine (2010) the condition for switching to the target mode is satisfied based on the reception (2005) of the first indication.
  • the first device 110 may perform (2025) the switching to the target mode and then transmit (2040) an indication regarding the switching being successful to the second device 120.
  • the first device 110 may transmit an indication for switching to or switching from a third operation mode to the second device 120. For example, no transmission is performed under the third operation mode.
  • a mode 0 i.e., the third mode
  • the first device 110 may harvest energy during mode 0.
  • the first device 110 may request to the second device 120 to switch to mode 0.
  • the second device 120 may command the first device 110 to switch to mode 0 or switch from mode 0.
  • the first device 110 may determine that the condition for switching from the first operation mode to the second operation mode is satisfied.
  • the first device 110 may transmit (2015) a request for the switching to the second device 120.
  • the second device 120 may transmit (2020) a response indicating an acknowledgment (ACK) of the request to the first device 110.
  • the first device 110 may perform (2025) the switching to the second signal generation mode.
  • the first device 110 may generate the external backscattering transmission signal.
  • the external backscattering may include amplifying the backscatter signal.
  • the first device 110 may transmit (2015) a request for the switching to the second device 120.
  • the first device 110 may request to the second device 120 to increase its capability.
  • the second device 120 may transmit (2020) a response indicating an acknowledgment (ACK) of the request to the first device 110.
  • the first device 110 may perform (2025) the switching to the first signal generation mode. For example, the first device 110 may generate the active transmission signal.
  • the request and acknowledgment may be transmitted in an A-IoT control information (ACI) .
  • ACI A-IoT control information
  • MAC CE medium access control control element
  • RRC radio resource control
  • the request may be a long time request.
  • the request may be a long time request that the first device 110 leaves out the first signal generation mode and works in the second signal generation mode until having a further switching command from the second device 120.
  • the request may be a short time request.
  • the request may be a short time request that the first device 110 works in the second signal generation mode for a time period and returns back to the first signal generation mode after the time period, and the time period is periodic or aperiodic.
  • the request is a one-shot request.
  • the request may be a one-shot request that the first device 110 works in the second signal generation mode for a current transmission burst only and returns back to the first signal generation mode for a subsequent transmission burst.
  • the first device 110 may perform (2025) the switching to the second signal generation mode. In this case, the first device 110 may switch to the second signal generation mode without requesting the second device 120.
  • the first device 110 may transmit (2030) an indication regarding the switching to the second signal generation mode to the second device 120.
  • the first device 110 may perform (2025) the switching to the first signal generation mode. In this case, the first device 110 may switch to the first signal generation mode without requesting the second device 120.
  • the first device 110 may transmit (2030) an indication regarding the switching to the first signal generation mode to the second device 120.
  • the second device 120 may transmit (2005) a first indication regarding a switching to the target mode (for example, the first signal generation mode or the second signal generation mode) to the first device 110.
  • the first device 110 may determine (2010) the condition for switching to the target mode is satisfied based on the reception (2005) of the first indication.
  • the first device 110 may perform (2025) the switching to the target mode and then transmit (2040) an indication regarding the switching being successful to the second device 120.
  • device type 2 capable ambient IoT tag it may need to reduce its capability to device type 1 temporarily, for example due to lack of storage energy that needs additional time to harvest energy from ambient energy source. After enough energy has been harvested, it could revert back to device type 2 model from device type 1 model again.
  • external carrier wave quality is good
  • using external carrier wave is benefit for node’s interference cancelation detention.
  • using internal generated carrier wave is benefit for received power at node.
  • FIG. 3 illustrates a signaling flow 300 of mode switching in accordance with some embodiments of the present disclosure.
  • the signaling flow 300 will be discussed with reference to FIG. 1A and FIG. 1B, for example, by using the first device 110, the second device 120 and the third device 130.
  • the second device 120 transmits (3010) a first signal to the first device 110.
  • the third device 130 transmits (3020) a second signal to the first device 110.
  • the first device 110 receives the first signal from the second device 120 and the second signal from the third device 130.
  • the second device 120 is associated with the first topology 100 shown in FIG. 1A, which shows that the second device 120 directly communicates with the first device 110.
  • the third device 130 is associated with the second topology 100’ shown in FIG. 1B, which shows that the second device 120 communicates with the first device 110 though the third device 130.
  • the first device 110 determines (3030) a target device from the second device 120 and the third device 130 based on one of: priority information of the first and second topologies or an indication regarding the target device from a network device.
  • the first device 110 performs a transmission with the target device. In this way, a better service quality can be achieved.
  • Topology selection may be a part of tag’s node selection procedure.
  • the target topology may be indicated by the second device 120.
  • the second device 120 may inform which device/node (i.e., the second device or the third device 130) needs to be selected tag in following transmission or in the next transmission in the command.
  • the first device 110 may not be required to response the command from the second device 120, if the command node (i.e., the second device 120) is not selected node after node selection procedure.
  • the priority information may be preconfigured.
  • the priority information may be configured by the network device (for example, the second device 120) .
  • the first device 110 may determine (3030) the target device to be the second device 120. For example, the first topology 100 has a higher priority by default without any configuration. In this case, the first device 110 may perform (3040) the transmission with the second device 120.
  • a topology which is selected in the last transmission/connection may have a higher priority. For example, if the priority information indicates that a topology which is selected in a previous transmission has a higher priority, the first device 110 may determine (3030) which topology is selected in the previous transmission. In this case, if the first topology 110 is selected in the transmission, the first device 110 may determine (3030) the target device to be the second device 120 and may perform (3040) the transmission with the second device 120. Alternatively, if the second topology 100’ is selected in the transmission, the first device 110 may determine (3030) the target device to be the third device 130 and may perform (3040’) the transmission with the third device 130.
  • the first device 110 may determine that the first topology has a higher priority than the second topology and determine (3030) the target device to be the second device 120. In this case, the first device 110 may perform (3040) the transmission with the second device 120.
  • the first device 110 may determine that the first topology has a higher priority than the second topology and determine (3030) the target device to be the second device 120. In this case, the first device 110 may perform (3040) the transmission with the second device 120.
  • the first device 110 may receive the first signal from the second device in a downlink spectrum in a frequency division duplex band.
  • the first device 110 may also receive the second signal from the third device in an uplink spectrum in the frequency division duplex band.
  • the first device 110 can distinguish node type, i.e. first node (the second device 110) or second node (the third device 130) , based on the spectrum where the command is received.
  • FIG. 2 and FIG. 3 can be implemented in any proper combinations or can be implemented separately.
  • FIG. 4 illustrates a flowchart of a communication method 400 implemented at a first device, in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 400 will be described from the perspective of the first device 110 in FIG. 1A and FIG. 1B.
  • the condition comprises at least one of: a lack of storage energy, a reference signal received power (RSRP) of a reference signal received from the second device being higher than a first RSRP threshold, the RSRP of the reference signal being smaller than a second RSRP threshold, a data volume for the transmission is higher than a first data volume threshold, the data volume for the transmission is smaller than a second data volume threshold, a quality of a carrier wave for backscatter is larger than a quality threshold, or a frequency offset of the carrier wave used for backscatter is less than a offset threshold.
  • RSRP reference signal received power
  • the method 400 comprises transmitting, to the second device, an indication for switching to or switching from a third operation mode, wherein no transmission is performed under the third operation mode.
  • FIG. 5 illustrates a flowchart of a communication method 500 implemented at a second device, in accordance with some embodiments of the present disclosure.
  • the method 500 will be described from the perspective of the second device 120 in FIG. 1A and FIG. 1B.
  • the second device 120 receives, from a first device, a transmission that is transmitted based on a target mode from a first mode and a second mode, wherein the first mode is a first operation mode and the second mode is a second operation mode that requires less power than the first operation mode, or wherein the first mode is a first signal generation mode and the second mode is a second signal generation mode which requires less power than the first signal generation mode.
  • the first operation mode and the second operation mode have at least one of: a common radio protocol, a common timing, a common frame structure, or a common waveform.
  • At least one of the followings of the second operation mode is smaller than that of the first operation mode: a maximum transmission power, a maximum transmission burst duration, or a maximum transmission coverage level.
  • the first signal generation mode is to generate an active transmission signal
  • the second signal generation mode is to an external carrier wave to generate a backscattering transmission signal
  • the method 500 comprises receiving a request for a switching to the target mode from the first device; and transmitting, to the first device, a response indicating an acknowledgment of the request.
  • the request is a long time request that the first device leaves out the first mode and works in the second mode until having a further switching command from the second device, or wherein the request is a short time request that the first device works in the second mode for a time period and returns back to the first mode after the time period, and the time period is periodic or aperiodic, or wherein the request is a one-shot request that the first device works in the second mode for a current transmission burst only and returns back to the first mode for a subsequent transmission burst.
  • the method 500 comprises receiving, from the first device, an indication regarding the switching to the target mode.
  • the method 500 comprises transmitting, to the first device, a first indication regarding a switching to the target mode; and receiving, from the first device, a second indication regarding the switching being successful.
  • the condition comprises at least one of: a lack of storage energy, a reference signal received power (RSRP) of a reference signal received from the second device being higher than a first RSRP threshold, the RSRP of the reference signal being smaller than a second RSRP threshold, a data volume for the transmission is higher than a first data volume threshold, the data volume for the transmission is smaller than a second data volume threshold, a quality of a carrier wave for backscatter is larger than a quality threshold, or a frequency offset of the carrier wave used for backscatter is less than a offset threshold.
  • RSRP reference signal received power
  • the first device is an ambient Internet of thing (IoT) tag
  • the second device is a network device or a terminal device.
  • IoT ambient Internet of thing
  • FIG. 6 illustrates a flowchart of a communication method 600 implemented at a first device, in accordance with some embodiments of the present disclosure. For the purpose of discussion, the method 600 will be described from the perspective of the first device 110 in FIG. 1A and FIG. 1B.
  • the first device 110 receives a first signal from a second device associated with a first topology.
  • the first device 110 receives a second signal from a third device associated with a second topology.
  • the first device 110 determines a target device from the second and third devices based on one of: priority information of the first and second topologies or an indication regarding the target device from a network device.
  • the first device 110 performs a transmission with the target device.
  • the priority information is preconfigured, or wherein the priority information is configured by the network device.
  • the method 600 comprises in response to the priority information indicating that the first topology has a higher priority than the second topology, determining the target device to be the second device.
  • the method 600 comprises in response to the priority information indicating that the second topology has a higher priority than the first topology, determining the target device to be the third device.
  • the method 600 comprises in response to the priority information indicating that a topology which is selected in a previous transmission has a higher priority, determining which topology is selected in the previous transmission; and in response to that the first topology is selected in the transmission, determining the target device to be the second device; or in response to that the second topology is selected in the transmission, determining the target device to be the third device.
  • the method 600 comprises in response to at least one of: a stored energy is larger than a first threshold or a quality of carrier wave corresponding to the second device is larger than a second threshold, determining that the first topology has a higher priority than the second topology; and determining the target device to be the second device.
  • the method 600 comprises in response to at least one of: a stored energy is less than a first threshold, a quality of carrier wave corresponding to the second device is less than a third threshold, or a quality of carrier wave corresponding to the third device is larger than a fourth threshold, determining that the second topology has a higher priority than the first topology; and determining the target device to be the third device.
  • the method 600 comprises receiving the first signal from the second device in a downlink spectrum in a frequency division duplex band; and receiving the second signal from the third device in an uplink spectrum in the frequency division duplex band.
  • the first signal indicates whether a carrier wave used for backscattering is the same frequency as the first signal or in another frequency different from a current carrier of the first signal
  • the second signal indicates whether a carrier wave used for backscattering is the same frequency as the second signal or in another frequency different from a current carrier of the second signal
  • the method 600 comprises in response to the target device being the second device, switching to a frequency spectrum for the transmission based on the first signal; and in response to the target device being the third device, switching to the frequency spectrum for the transmission based on the second signal.
  • the first device is an ambient Internet of thing (IoT) tag
  • the second device is a network device
  • the third device is a terminal device.
  • IoT ambient Internet of thing
  • FIG. 7 is a simplified block diagram of a device 700 that is suitable for implementing embodiments of the present disclosure.
  • the device 700 can be considered as a further example implementation of any of the devices as shown in FIG. 1 A and FIG. 1B. Accordingly, the device 700 can be implemented at or as at least a part of the first device 110 or the second device 120.
  • the device 700 includes a processor 710, a memory 720 coupled to the processor 710, a suitable transceiver 740 coupled to the processor 710, and a communication interface coupled to the transceiver 740.
  • the memory 720 stores at least a part of a program 730.
  • the transceiver 740 may be for bidirectional communications or a unidirectional communication based on requirements.
  • the transceiver 740 may include at least one of a transmitter 742 and a receiver 744.
  • the transmitter 742 and the receiver 744 may be functional modules or physical entities.
  • the transceiver 740 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones.
  • the communication interface may represent any interface that is necessary for communication with other network elements, such as X2/Xn interface for bidirectional communications between eNBs/gNBs, S1/NG interface for communication between a Mobility Management Entity (MME) /Access and Mobility Management Function (AMF) /SGW/UPF and the eNB/gNB, Un interface for communication between the eNB/gNB and a relay node (RN) , or Uu interface for communication between the eNB/gNB and a terminal device.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • RN relay node
  • Uu interface for communication between the eNB/gNB and a terminal device.
  • the program 730 is assumed to include program instructions that, when executed by the associated processor 710, enable the device 700 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGS. 1 to 6.
  • the embodiments herein may be implemented by computer software executable by the processor 710 of the device 700, or by hardware, or by a combination of software and hardware.
  • the processor 710 may be configured to implement various embodiments of the present disclosure.
  • a combination of the processor 710 and memory 720 may form processing means 750 adapted to implement various embodiments of the present disclosure.
  • the memory 720 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 720 is shown in the device 700, there may be several physically distinct memory modules in the device 700.
  • the processor 710 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 700 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • a first device comprising a circuitry.
  • the circuitry is configured to: determine whether a condition for switching between a first mode and a second mode is satisfied, wherein the first mode is a first operation mode and the second mode is a second operation mode that requires less power than the first operation mode, or wherein the first mode is a first signal generation mode and the second mode is a second signal generation mode ; and perform a transmission with a second device based on a target mode from the first and second modes which the first device is switched to based on the determination.
  • the circuitry may be configured to perform any method implemented by the first device, as discussed above.
  • circuitry used herein may refer to hardware circuits and/or combinations of hardware circuits and software.
  • the circuitry may be a combination of analog and/or digital hardware circuits with software/firmware.
  • the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions.
  • the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software/firmware for operation, but the software may not be present when it is not needed for operation.
  • the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and/or firmware.
  • a first apparatus comprises means for determining whether a condition for switching between a first mode and a second mode is satisfied, wherein the first mode is a first operation mode and the second mode is a second operation mode that requires less power than the first operation mode, or wherein the first mode is a first signal generation mode and the second mode is a second signal generation mode ; and means for performing a transmission with a second device based on a target mode from the first and second modes which the first device is switched to based on the determination.
  • the first apparatus may comprise means for performing the respective operations of the method 400.
  • the first apparatus may further comprise means for performing other operations in some example embodiments of the method 400.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • a first apparatus comprises means for receiving a first signal from a second device associated with a first topology; means for receiving a second signal from a third device associated with a second topology; means for determining a target device from the second and third devices based on one of: priority information of the first and second topologies or an indication regarding the target device from a network device; and means for performing a transmission with the target device.
  • the third apparatus may comprise means for performing the respective operations of the method 600.
  • the third apparatus may further comprise means for performing other operations in some example embodiments of the method 600.
  • the means may be implemented in any suitable form.
  • the means may be implemented in a circuitry or software module.
  • a first device comprising: a processor, configured to cause the first device to: determine whether a condition for switching between a first mode and a second mode is satisfied, wherein the first mode is a first operation mode and the second mode is a second operation mode that requires less power than the first operation mode, or wherein the first mode is a first signal generation mode and the second mode is a second signal generation mode ; and perform a transmission with a second device based on a target mode from the first and second modes which the first device is switched to based on the determination.
  • the first operation mode and the second operation mode have at least one of: a common radio protocol, a common timing, a common frame structure, or a common waveform.
  • the request is a long time request that the first device leaves out the first mode and works in the second mode until having a further switching command from the second device, or wherein the request is a short time request that the first device works in the second mode for a time period and returns back to the first mode after the time period, and the time period is periodic or aperiodic, or wherein the request is a one-shot request that the first device works in the second mode for a current transmission burst only and returns back to the first mode for a subsequent transmission burst.
  • the first device is caused to: in response to the condition being satisfied, switch to the target mode; and transmit, to the second device, an indication regarding the switching to the target mode.
  • the first device is caused to: receive, from the second device, a first indication regarding a switching to the target mode; determine that the condition is satisfied based on the reception of the first indication; switch to the target mode based on the indication; and transmit, to the second device, a second indication regarding the switching being successful.
  • the condition comprises at least one of: a lack of storage energy, a reference signal received power (RSRP) of a reference signal received from the second device being higher than a first RSRP threshold, the RSRP of the reference signal being smaller than a second RSRP threshold, a data volume for the transmission is higher than a first data volume threshold, the data volume for the transmission is smaller than a second data volume threshold, a quality of a carrier wave for backscatter is larger than a quality threshold, or a frequency offset of the carrier wave used for backscatter is less than a offset threshold.
  • RSRP reference signal received power
  • the first device is caused to: transmit, to the second device, an indication for switching to or switching from a third operation mode, wherein no transmission is performed under the third operation mode.
  • the first device is an ambient Internet of thing (IoT) tag
  • the second device is a network device or a terminal device.
  • IoT ambient Internet of thing
  • a second device comprising: a processor, configured to cause the second device to: receive, from a first device, a transmission that is transmitted based on a target mode from a first mode and a second mode, wherein the first mode is a first operation mode and the second mode is a second operation mode that requires less power than the first operation mode, or wherein the first mode is a first signal generation mode and the second mode is a second signal generation mode which requires less power than the first signal generation mode.
  • the first device is an ambient Internet of thing (IoT) tag
  • the second device is a network device or a terminal device.
  • IoT ambient Internet of thing
  • the first device is caused to: in response to at least one of: a stored energy is larger than a first threshold or a quality of carrier wave corresponding to the second device is larger than a second threshold, determine that the first topology has a higher priority than the second topology; and determine the target device to be the second device.
  • the first device is caused to: receive the first signal from the second device in a downlink spectrum in a frequency division duplex band; and receive the second signal from the third device in an uplink spectrum in the frequency division duplex band.
  • the first signal indicates whether a carrier wave used for backscattering is the same frequency as the first signal or in another frequency different from a current carrier of the first signal
  • the second signal indicates whether a carrier wave used for backscattering is the same frequency as the second signal or in another frequency different from a current carrier of the second signal
  • the first device is caused to: in response to the target device being the second device, switch to a frequency spectrum for the transmission based on the first signal; and in response to the target device being the third device, switch to the frequency spectrum for the transmission based on the second signal.
  • the first device is an ambient Internet of thing (IoT) tag
  • the second device is a network device
  • the third device is a terminal device.
  • IoT ambient Internet of thing
  • a first device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the first device, discussed above.
  • a second device comprises: at least one processor; and at least one memory coupled to the at least one processor and storing instructions thereon, the instructions, when executed by the at least one processor, causing the device to perform the method implemented by the second device, discussed above.
  • the above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • the machine readable medium may be a machine readable signal medium or a machine readable storage medium.
  • a machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • machine readable storage medium More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM portable compact disc read-only memory
  • magnetic storage device or any suitable combination of the foregoing.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Des modes de réalisation de la présente divulgation concernent une solution de commutation de mode. Dans une solution, un premier dispositif détermine si une condition de commutation entre un premier mode et un second mode est satisfaite, le premier mode étant un premier mode de fonctionnement et le second mode étant un second mode de fonctionnement qui nécessite moins d'énergie que le premier mode de fonctionnement, ou le premier mode étant un premier mode de génération de signal et le second mode étant un second mode de génération de signal ; et effectuer une transmission avec un second dispositif sur la base d'un mode cible entre le premier et le second mode vers lequel le premier dispositif est commuté sur la base de la détermination.
PCT/CN2024/076980 2024-02-08 2024-02-08 Dispositifs et procédés de communication Pending WO2025166743A1 (fr)

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US20180343685A1 (en) * 2017-05-24 2018-11-29 Vivint, Inc. Mesh topology radio
US20190173543A1 (en) * 2016-06-29 2019-06-06 University Of Massachusetts Systems, devices, and methods for providing power-proportional communication
WO2019158187A1 (fr) * 2018-02-13 2019-08-22 Huawei Technologies Co., Ltd. Techniques d'estimation de position assistée de manière coopérative
US20210271831A1 (en) * 2020-02-27 2021-09-02 Intermec Ip Corp. Methods, apparatuses, and systems for power control on vehicle mounted rfid system
US20230179247A1 (en) * 2020-05-04 2023-06-08 Orange Device for controlling the operation of a wireless fdd communication device, and associated control method

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Publication number Priority date Publication date Assignee Title
US20190173543A1 (en) * 2016-06-29 2019-06-06 University Of Massachusetts Systems, devices, and methods for providing power-proportional communication
US20180343685A1 (en) * 2017-05-24 2018-11-29 Vivint, Inc. Mesh topology radio
WO2019158187A1 (fr) * 2018-02-13 2019-08-22 Huawei Technologies Co., Ltd. Techniques d'estimation de position assistée de manière coopérative
US20210271831A1 (en) * 2020-02-27 2021-09-02 Intermec Ip Corp. Methods, apparatuses, and systems for power control on vehicle mounted rfid system
US20230179247A1 (en) * 2020-05-04 2023-06-08 Orange Device for controlling the operation of a wireless fdd communication device, and associated control method

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