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WO2023244144A1 - Procédé de gestion de couverture radio d'un réseau non terrestre - Google Patents

Procédé de gestion de couverture radio d'un réseau non terrestre Download PDF

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Publication number
WO2023244144A1
WO2023244144A1 PCT/SE2022/050589 SE2022050589W WO2023244144A1 WO 2023244144 A1 WO2023244144 A1 WO 2023244144A1 SE 2022050589 W SE2022050589 W SE 2022050589W WO 2023244144 A1 WO2023244144 A1 WO 2023244144A1
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WO
WIPO (PCT)
Prior art keywords
geographical area
cells
radio
radio cells
coverage
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.)
Ceased
Application number
PCT/SE2022/050589
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English (en)
Inventor
Murali Krishna SRINIVASAN
Sten Wallin
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
Priority to PCT/SE2022/050589 priority Critical patent/WO2023244144A1/fr
Publication of WO2023244144A1 publication Critical patent/WO2023244144A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/1853—Satellite systems for providing telephony service to a mobile station, i.e. mobile satellite service
    • H04B7/18539—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection
    • H04B7/18541—Arrangements for managing radio, resources, i.e. for establishing or releasing a connection for handover of resources
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/06—Airborne or Satellite Networks

Definitions

  • the present disclosure relates to a method to manage radio coverage of a non-terrestrial network, NTN, in a geographical area performed by a network node, wherein the radio coverage in the geographical area is provided by radio cells carried by a plurality of vehicles.
  • the present disclosure further relates to a network node, a system, a computer program and a computer program product.
  • a non-terrestrial network provides RAN (Radio Access Networks) from moving platforms or vehicles.
  • RAN Radio Access Networks
  • a terrestrial network typically has stationary carriers of cells, e.g., cell towers.
  • RAN Radio Access Networks
  • satellite-based RAN satellite-based RAN.
  • dronebased and road vehicle-based RAN include dronebased and road vehicle-based RAN.
  • a stream of satellite orbits the earth and use controllable antenna beams to provide cell coverage to geographical areas on earth. These geographical areas are sometimes referred to as Cell Areas.
  • the term used to describe the entity created by coverage provided by a beam, e.g., provided from a satellite, enabling RAN coverage in a cell area is cell.
  • a certain cell area may be provided with coverage from a plurality of cells, e.g., carried by two or more satellites at a time. Thereby the cell area can be provided with uninterrupted network coverage in that area as vehicles move to or from the geographical area.
  • a UE User Equipment
  • a UE in the cell area may detect the cell from one satellite as it comes into position over the geographic area and detect the cell from the next satellite before first transits out of coverage.
  • a UE in a cell area would detect “Cyclic Fleeting Cells”, i.e., cells that appear, disappear, and reappear as the satellites orbit around the earth.
  • a UE would therefore attach to the first cell from first satellite that it detects, and then would require a handover to the second satellite (as the first satellite moves out of the cell area) to maintain network connectivity.
  • a network node such as a gNB
  • a gNB is typically expected to provide service for one or more cell areas. This is equivalent to serving traditional cells or transmission points. The gNB would thus need to serve one or more cyclic fleeting cells for each cell area at any given time.
  • a cell is typically defined in the network node as a semi dynamic entity that utilizes hardware and software resources (such as compute, network, accelerator, memory, caches, threads, data structures, queues, timers etc.) to schedule RAN access to UEs.
  • the ell can therefore be seen as semi-static. I.e., an entity that may be created and deleted but not too often. Once created cells generally persist for a long period of time.
  • the number of cells supported by a single network node, such as a gNB, is therefore proportional to available resources and scheduling complexity resulting from the number of cells. Further, configuring a cell involves several Management-plane (M-plane) exchanges or signaling between different RAN software and hardware entities.
  • M-plane Management-plane
  • NTN non-terrestrial network
  • the object of the invention is achieved by ...
  • Fig. 1 illustrates a non-terrestrial network according to one or more embodiments of the present disclosure.
  • Fig. 2 shows an example of a geographical area according to one or more embodiments of the present disclosure.
  • Fig. 3 shows an embodiment wherein the NTN comprises a satellite network according to one or more embodiments of the present disclosure.
  • Fig. 4 shows an embodiment wherein the NTN comprises a drone network according to one or more embodiments of the present disclosure.
  • Fig. 5 shows an embodiment wherein the NTN comprises a road-vehicle network according to one or more embodiments of the present disclosure.
  • Fig. 6 shows an alternative embodiment wherein the NTN comprises a satellite network according to one or more embodiments of the present disclosure.
  • Fig. 7 shows a flowchart of a method according to one or more embodiments of the present disclosure.
  • Fig. 8 shows details of detecting the first set of radio cells.
  • Fig. 9 shows details of detecting the second set of radio cells.
  • Fig. 10 shows details of a network 160 according to one or more embodiments of the present disclosure.
  • the term used to describe the entity created by coverage provided by a controllable antenna beam e.g., provided from a satellite and enabling RAN coverage in a cell area, are referred to as cells, cell beams, beam spots, spot beams or satellite cells.
  • a certain cell area may be provided with coverage from a plurality of cells, e.g., carried by two or more satellites at a time. Thereby the cell area can be provided with uninterrupted network coverage in that area.
  • These cells cover a relatively small geographical area compared to traditional satellites which may cover a large part of the earth’s surface.
  • the present disclosure proposes to create cell groups in a network node, such as a Long-Term Evolution gNB.
  • Each cell group comprises a list of all possible cells able to cover a particular cell area/geographical area.
  • the network node then limits the number of active cells or moving cells or fleeting cells in a cell group to the ones that currently is capable to serve the respective Cell Area with a desired coverage quality.
  • Cells or fleeting cells are semi-dynamic and can be added to a Cell Group as required.
  • RAN resources can be used mor efficient by prescheduling handovers of UE using predetermined information on movements of cells, e.g., orbit paths and intersatellite distances of a satellite network.
  • vehicle denotes an entity that is configured to carry an antenna unit capable to provide cell coverage to a geographical area. Examples of vehicles are satellites, high-altitude platform stations, HAPS, drones, or road/track- based vehicles.
  • the term “coverage” denotes providing radio coverage of a nonterrestrial network, NTN.
  • the term “effective coverage” denotes providing coverage fulfilling predefined coverage quality thresholds.
  • coverage quality thresholds are Received Signal Strength Indicator, RSSI, Reference Signal Received Power, RSRP, Reference Signal Received Quality, RSRQ.
  • radio cell denotes a logical entity having an associated identity, such as a cell identity.
  • Fig. 1 illustrates a non-terrestrial network according to one or more embodiments of the present disclosure.
  • the earth’s surface 150 is divided into a grid of geographical areas 130. It is understood that the geographical area 130 may be configured with any suitable shape and is not limited to a rectangular or square shape.
  • Fig. 1 further shows a plurality of vehicles 110, 120, each provided with a respective radio module 111 , 121 , configured to providing effective coverage 181 , 182 in the geographical area 130.
  • the radio modules 111 , 121 are typically comprising a selection of a Radio Unit, RU, or a radio transceiver including antenna/s.
  • the radio module 111 , 121 further comprises a Distributed Unit, DU, for so-called Layer 1 or L1 computing and real-time L2 computing.
  • the radio module further comprises a Centralized Unit, CU, for non-real-time L2 and L3 computing. This largely follow the definition in Open RAN or ORAN.
  • Fig. 1 further shows a network node 160 that is configured to communicate with the vehicles 110, 120 and/or the respective radio modules 111 , 121.
  • the network node 160 may communicate directly with the vehicles 110, 120 and/or the respective radio modules 111 , 121 or communicate via an optional gateway 140.
  • Fig. 2 shows an example of a geographical area 130 according to one or more embodiments of the present disclosure.
  • Fig. 2 shows a vehicle 110 and a respective radio module 121 capable of providing coverage or effective coverage in the geographical area 130.
  • Fig. 2 further shows how the geographical area 130 is defined by two latitude values 211 , 212 and two longitude values 221 , 221 .
  • Fig. 3 shows an embodiment wherein the NTN comprises a satellite network according to one or more embodiments of the present disclosure.
  • the NTN comprises a plurality of vehicles on the form of satellites 320-324.
  • the satellites are configured to move over the geographical area 130 over the earth’s surface 150 in an orbit and substantially or under practical circumstances along the same path.
  • the satellites may be distributed along the path with equal distances between them. This enables a network node to have knowledge of where a particular satellite is currently located and where the same satellite will be located at a point later in time.
  • the time for handover from a first cell carried by a first satellite 322 to a second cell carried by a second satellite 321 can thereby optionally be scheduled in time.
  • Fig. 3 further illustrates how all the shown satellites 320-324 are potentially capable of providing coverage in the geographical area 130, however only two of the satellites 321 , 322 closest to the geographical area 130 are capable of providing effective coverage.
  • Effective coverage is defined by predefined coverage quality thresholds, e.g., defining signal strength and signal quality of the provided coverage in relation to the coverage quality thresholds.
  • Fig. 4 shows an embodiment wherein the NTN comprises a drone network according to one or more embodiments of the present disclosure.
  • the NTN comprises a plurality of vehicles on the form of drones 420-424.
  • the drones are configured to move over the geographical area 130 over the earth’s surface 150 along predetermined paths.
  • Fig. 4 further illustrates how all the shown drones 420-424 are potentially capable of providing coverage in the geographical area 130, however only two of the drones 421 , 422 closest to the geographical area 130 are capable of providing effective coverage.
  • Effective coverage is defined by predefined coverage quality thresholds, e.g., defining signal strength and signal quality of the provided coverage in relation to the coverage quality thresholds.
  • the ability to provide effective coverage is also limited by the radio modules and their capability to control or steer antenna beams. In other words, once the vehicle moves sufficiently far from the geographical area 130, a beam can no longer be directed by the radio module to the geographical area 130.
  • Fig. 5 shows an embodiment wherein the NTN comprises a road-vehicle network according to one or more embodiments of the present disclosure.
  • the NTN comprises a plurality of vehicles on the form of road vehicles 520-524.
  • the road vehicles are configured to move around in the geographical area 130 over the earth’s surface 150 along predetermined paths such as roads and/or tracks.
  • Fig. 5 further illustrates how all the shown road vehicles 520-524 are potentially capable of providing coverage in the geographical area 130, however only two of the road vehicles 520- 524 closest to the geographical area 130 are capable of providing effective coverage.
  • Effective coverage is defined by predefined coverage quality thresholds, e.g., defining signal strength and signal quality of the provided coverage in relation to the coverage quality thresholds.
  • the ability to provide effective coverage may also be limited by the radio modules and their capability to control or steer antenna beams. In other words, once the vehicle moves sufficiently far from the geographical area 130, a beam can no longer be directed by the radio module to the geographical area 130.
  • a first bus 522 is moving away from the geographical area 130 and a second bus 521 is moving away towards the geographical area 130.
  • the ability to provide effective coverage is also limited by the radio modules and their capability to control or steer antenna beams. In other words, once the vehicle 320-324 move sufficiently far from the geographical area 130, a beam can no longer be directed by the radio module to the geographical area 130.
  • Fig. 6 shows an alternative embodiment wherein the NTN comprises a satellite network according to one or more embodiments of the present disclosure.
  • the NTN comprises a plurality of vehicles on the form of satellites 320-324.
  • the satellites capability to provide effective coverage in the geographical area 130 is further detected by considering the elevation angles a, p.
  • a high elevation angle is desired, and an elevation angles a, p below a threshold may lead to a detection that a cell is no longer capable of providing effective coverage in the geographical area 130.
  • Fig. 7 shows a flowchart of a method 700 according to one or more embodiments of the present disclosure.
  • the method is configured to manage radio coverage of a non-terrestrial network, NTN, in a geographical area 130 performed by a network node 160.
  • the radio coverage in the geographical area 130 is provided by radio cells carried by a plurality of vehicles 110, 120.
  • the method comprises:
  • Step 710 detecting a first set of radio cells, from a list of radio cells associated to the geographical area, that are no longer capable of providing effective coverage in the geographical area. Effective coverage is defined by predefined coverage quality thresholds as described herein.
  • the list of radio cells comprises cells carried by vehicles 110, 120 moving in the geographical area 130, into/out of the geographical area 130 or over the geographical area 130.
  • This is the case e.g., with a series of satellites having a known orbit over the geographical area 130.
  • This is also the case e.g., with drones moving in known paths over the geographical area 130.
  • This is also the case e.g., with road vehicles moving in known paths over the geographical area 130, e.g., trams or busses.
  • the method further comprises:
  • Step 720 deactivating the first set of radio cells.
  • Deactivating comprises releasing resources, e.g., in the network node.
  • the resources comprise a selection of runtime environment resources, processing resources, memory resources, cache resources, and que resources required by an active cell in the NTN.
  • deactivating a cell comprises releasing resources dedicated to the cell and adding the resources to a resource pool available to other cells.
  • the method further comprises:
  • Step 740 activating the second set of radio cells, wherein activating comprises allocating resources, e.g., in the network node.
  • activating a cell comprises reserving resources for the cell and removing the resources from the resource pool.
  • steps 730 detecting a second set of radio cells and 740 activating the second set of radio cells may be performed before the steps 710 detecting a first set of radio cells and 720 deactivating the first set of radio cells without departing from the present disclosure, depending on the relevant implementation.
  • the method further comprises: Step 705: obtaining positions of the plurality of vehicles 110, 120 carrying the radio cells in the list of radio cells.
  • the positions may comprise current positions and/or historic position of the vehicles 110, 120.
  • Fig. 8 shows details of detecting 710 the first set of radio cells.
  • detecting 710 the first set of radio cells comprises the steps:
  • Step 721 determining which vehicles that have current positions that does not allow one or more carried radio cells to provide effective coverage in the geographical area.
  • This determination may be performed by evaluating one or more criteria on characteristics of the vehicle, the radio module of the vehicle, the cell.
  • the determination is performed by evaluating measurements of the provided coverage in relation to predefined coverage quality thresholds, e.g., measurements performed by a user equipment and sent as a message to the network node.
  • the predefined coverage quality thresholds may e.g., comprise signal strength and signal quality thresholds.
  • the determination is performed by determining that the geographical area 130 is outside boundaries to where the cell beam/s can be controlled or provided by the cell/the radio module of the vehicle 110, 120.
  • the determination is performed by determining that an elevation angle of a vehicle 110, 120, e.g., seen from a UE in the geographical area 130, is below a threshold.
  • Step 723 selecting the radio cells carried by the determined vehicles as the first set of radio cells.
  • Fig. 9 shows details of detecting 730 the second set of radio cells.
  • detecting 730 the second set of radio cells comprises the steps:
  • This determination may be performed by evaluating one or more criteria on characteristics of the vehicle, the radio module of the vehicle, the cell.
  • the determination is performed by evaluating measurements of the provided coverage in relation to predefined coverage quality thresholds, e.g., measurements performed by a user equipment and sent as a message to the network node.
  • the predefined coverage quality thresholds may e.g., comprise signal strength and signal quality thresholds.
  • the determination is performed by determining that the geographical area 130 is inside boundaries to where the cell beam/s can be controlled or provided by the cell/the radio module of the vehicle 110, 120.
  • the determination is performed by determining that an elevation angle of a vehicle 110, 120, e.g., seen from a UE in the geographical area 130, is above a threshold.
  • Step 733 selecting respective cells of the determined vehicles as the second set of radio cells.
  • the radio coverage provided in the geographical area is provided by controllable beams generated by one or more antennas on-board the vehicles 110, 120.
  • the radio module is configured to control beams using antennas, such as smart antennas.
  • the NTN network is a satellite network
  • the plurality of vehicles comprise satellites configured to move over the geographical area.
  • the satellite network is any one of ...
  • the NTN network is a drone network
  • the plurality of vehicles comprise drones configured to move over the geographical area.
  • the drone network is any one of...
  • the NTN network is a road vehicle network
  • the plurality of vehicles comprise road vehicles configured to move on roads or tracks in the geographical area.
  • a large number of vehicles such as city busses, are provided with radio modules capable of providing coverage for a cell.
  • the vehicles move in and out of the geographical area 130 and are activated/deactivated according to the present disclosure.
  • deactivating cells comprises releasing resources dedicated to cells in the first set of radio cells. In one example, deactivating a cell comprises releasing resources dedicated to the cell and adding the resources to a resource pool available to other cells.
  • activating cells comprises reserving resources dedicated to cells in the second set of radio cells.
  • obtaining current positions comprises receiving one or more messages indicative of positions of the plurality of vehicles 110, 120 comprised in the NTN.
  • the one or more messages may be received directly from the vehicles 110, 120 or via a gateway 140.
  • obtaining current positions comprises calculating positions of the plurality of vehicles 110, 120 using predetermined data.
  • the predetermined data comprises path of the vehicles 110, 120, orbit of the vehicles 110, 120, speed of the vehicles 110, 120 and distance between the vehicles 110, 120.
  • a network node 160 is provided and is disposed in a non-terrestrial network, NTN, communications environment.
  • the network node 160 is configured to manage radio coverage in a defined geographical area 130.
  • the network node 160 comprises a computer comprising processing circuitry 1012; and a memory 1015, said memory 1015 containing instructions executable by said processor, whereby said node is operative to perform the method described herein.
  • the network node 160 is configured as at least one of:
  • a communications satellite disposed in one of a low earth orbit (LEO), a medium earth orbit (MEO), and a geostationary orbit (GEO);
  • HAPS high-altitude platform station
  • an NTN gateway configured to interoperate with a terrestrial communications network
  • gNB a gateway NodeB, gNB.
  • a system configured to manage radio coverage of a non-terrestrial network, NTN, in a geographical area 130.
  • the system comprises: a network node 16 as described herein, and a plurality of radio cells, each radio cell at least carried by a vehicle 110, 120 of a plurality of vehicles, wherein the plurality of radio cells is configured to provide radio coverage in the geographical area 130
  • the system is operable to: detect, by the network node 160, a first set of radio cells, from a list of radio cells associated to the geographical area, that are no longer capable of providing effective coverage in the geographical area, wherein effective coverage is defined by predefined coverage quality thresholds, and if cells that are no longer providing effective coverage in the geographical area are detected: deactivate, by the network node 160, the first set of radio cells, wherein deactivating comprises releasing resources in the network node, detect, by the network node 160, a second set of radio cells from the list of radio cells, that are starting to be capable of providing effective coverage in the geographical area
  • the system is further operable to: obtain, by the network node, current positions of the plurality of vehicles carrying the radio cells in the list of radio cells, wherein detect the first set of radio cells comprises: determine which vehicles that have current positions that does not allow one or more carried radio cells to provide effective coverage in the geographical area, and select the radio cells carried by the determined vehicles as the first set of radio cells, wherein detect the second set of radio cells comprises: determine which vehicles that have a historic position that does not allow carried radio cells to provide effective coverage in the geographical area and a current position that allow carried radio cells to provide effective coverage in the geographical area, and select respective cells of the determined vehicles as the second set of radio cells.
  • a computer program comprising computerexecutable instructions for causing a computer, when the computer-executable instructions are executed on processing circuitry comprised in the computer, to perform the method described herein.
  • a computer program product comprising a computer-readable storage medium 1015, the computer-readable storage medium 1015 having the computer program above embodied therein.
  • Fig. 10 shows details of a network 160 according to one or more embodiments of the present disclosure.
  • the network node 160 may be in the form of a selection of any of network node, a desktop computer, server, laptop, mobile device, a smartphone, a tablet computer, a smart watch etc.
  • the network node 160 may comprise processing circuitry 1012.
  • the network node 160 may optionally comprise a communications interface 1004 for wired and/or wireless communication. Further, the network node 160 may further comprise at least one optional antenna (not shown in figure).
  • the antenna may be coupled to a transceiver of the communications interface 1004 and is configured to transmit and/or emit and/or receive wireless signals, e.g., in a wireless communication system, such as Long-Term Evolution, LTE, network.
  • the processing circuitry 1012 may be any of a selection of processor and/or a central processing unit and/or processor modules and/or multiple processors configured to cooperate with each-other.
  • the network node 160 may further comprise a memory 1015.
  • the memory 1015 may contain instructions executable by the processing circuitry 1012, that when executed causes the processing circuitry 1012 to perform any of the methods and/or method steps described herein.
  • the communications interface 1004 e.g., the wireless transceiver and/or a wired/wireless communications network adapter, which is configured to send and/or receive data values or parameters as a signal to or from the processing circuitry 1012 to or from other external nodes
  • the communications interface 1004 communicates directly between nodes or via a communications network.
  • the network node 160 may further comprise an input device 1017, configured to receive input or indications from a user and send a user-input signal indicative of the user input or indications to the processing circuitry 1012.
  • the network node 160 may further comprise a display 1018 configured to receive a display signal indicative of rendered objects, such as text or graphical user input objects, from the processing circuitry 1012 and to display the received signal as objects, such as text or graphical user input objects.
  • a display signal indicative of rendered objects such as text or graphical user input objects
  • the display 1018 is integrated with the user input device 1017 and is configured to receive a display signal indicative of rendered objects, such as text or graphical user input objects, from the processing circuitry 1012 and to display the received signal as objects, such as text or graphical user input objects, and/or configured to receive input or indications from a user and send a user-input signal indicative of the user input or indications to the processing circuitry 1012.
  • the network node 160 may further comprise one or more sensors (not shown).
  • the processing circuitry 1012 is communicatively coupled to the memory 1015 and/or the communications interface 1004 and/or the input device 1017 and/or the display 1018.
  • the communications interface and/or transceiver 1004 communicates using wired and/or wireless communication techniques.
  • the one or more memory 1015 may comprise a selection of a hard RAM, disk drive, a floppy disk drive, a magnetic tape drive, an optical disk drive, a CD or DVD drive (R or RW), or other removable or fixed media drive.
  • the network node 160 may further comprise and/or be coupled to one or more additional sensors (not shown) configured to receive and/or obtain and/or measure physical properties pertaining to the network node or the environment of the network node and send one or more sensor signals indicative of the physical properties to the processing circuitry 1012.
  • additional sensors not shown
  • the network node 160 may further comprise and/or be coupled to one or more additional sensors (not shown) configured to receive and/or obtain and/or measure physical properties pertaining to the network node or the environment of the network node and send one or more sensor signals indicative of the physical properties to the processing circuitry 1012.
  • a network node comprises any suitable combination of hardware and/or software needed to perform the tasks, features, functions, and methods disclosed herein.
  • the components of the network node are depicted as single boxes located within a larger box, or nested within multiple boxes, in practice, a network node may comprise multiple different physical components that make up a single illustrated component (e.g., memory 1015 may comprise multiple separate hard drives as well as multiple RAM modules).
  • the network node 160 may be composed of multiple physically separate components, which may each have their own respective components.
  • the communications interface 1004 may also include multiple sets of various illustrated components for different wireless technologies, such as, for example, GSM, WCDMA, LTE, NR, Wi-Fi, or Bluetooth wireless technologies. These wireless technologies may be integrated into the same or different chip or set of chips and other components within the network node 160.
  • Processing circuitry 1012 is configured to perform any determining, calculating, or similar operations (e.g., certain obtaining operations) described herein as being provided by a network node 160. These operations performed by processing circuitry 1012 may include processing information obtained by processing circuitry 1012 by, for example, converting the obtained information into other information, comparing the obtained information, or converted information to information stored in the network node, and/or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination.
  • processing information obtained by processing circuitry 1012 by, for example, converting the obtained information into other information, comparing the obtained information, or converted information to information stored in the network node, and/or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination.
  • Processing circuitry 1012 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 160 components, such as device readable medium, computer 160 functionality.
  • processing circuitry 1012 may execute instructions stored in device readable medium 1015 or in memory within processing circuitry 1012. Such functionality may include providing any of the various wireless features, functions, or benefits discussed herein.
  • processing circuitry 1012 may include a system on a chip.
  • processing circuitry 1012 may include one or more of radio frequency, RF, transceiver circuitry and baseband processing circuitry.
  • RF transceiver circuitry and baseband processing circuitry may be on separate chips or sets of chips, boards, or units, such as radio units and digital units.
  • part or all of RF transceiver circuitry and baseband processing circuitry may be on the same chip or set of chips, boards, or units
  • processing circuitry 1012 may perform some or all the functionality described herein as being provided by a network node 160 executing instructions stored on device readable medium 1015 or memory within processing circuitry 1012. In alternative embodiments, some or all the functionalities may be provided by processing circuitry 1012 without executing instructions stored on a separate or discrete device readable medium, such as in a hard-wired manner. In any of those embodiments, whether executing instructions stored on a device readable storage medium or not, processing circuitry 1012 can be configured to perform the described functionality. The benefits provided by such functionality are not limited to processing circuitry 1012 alone or to other components of network node 160 but are enjoyed by network node 160, and/or by end users.
  • Device readable medium or memory 1015 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 (for example, a flash drive, a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or any other volatile or non-volatile, non-transitory device readable and/or computerexecutable memory devices that store information, data, and/or instructions that may be used by processing circuitry 1012.
  • 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 (for example, a flash drive, a Compact Disk (CD) or a Digital Video Disk (DVD)), and/or any other volatile or
  • Device readable medium 1015 may store any suitable instructions, data, or information, including a computer program, software, an application including one or more of logic, rules, code, tables, etc. and/or other instructions capable of being executed by processing circuitry 1012 and, utilized by network node 160.
  • Device readable medium may be used to store any calculations made by processing circuitry 1012 and/or any data received via interface 1004.
  • processing circuitry 1012 and device readable medium 1015 may be considered to be integrated.
  • the communications interface 1004 is used in the wired or wireless communication of signaling and/or data between network node 160 and other nodes.
  • Interface 1004 may comprise port(s)/terminal(s) to send and receive data, for example to and from network node 160 over a wired connection.
  • Interface 1004 also includes radio front end circuitry that may be coupled to, or in certain embodiments a part of, an antenna. Radio front end circuitry may comprise filters and amplifiers. Radio front end circuitry may be connected to the antenna and/or processing circuitry 1012.
  • Examples of a network node 160 include, but are not limited to an gNB, a gateway, a smart phone, a mobile phone, a cell phone, a voice over IP (VoIP) phone, a wireless local loop phone, a tablet computer, a desktop computer, a personal digital assistant (PDA), a wireless cameras, a gaming console or device, a music storage device, a playback appliance, a wearable terminal device, a wireless endpoint, a mobile station, a tablet, a laptop, a laptop-embedded equipment (LEE), a laptop-mounted equipment (LME), a smart device, a wireless customer-premise equipment (CPE), a vehicle-mounted wireless terminal device, etc.
  • VoIP voice over IP
  • the communication interface 1004 may encompass wired and/or wireless networks such as a local-area network (LAN), a wide-area network (WAN), a computer network, a wireless network, a telecommunications network, another like network or any combination thereof.
  • the communication interface may be configured to include a receiver and a transmitter interface used to communicate with one or more other devices over a communication network according to one or more communication protocols, such as Ethernet, TCP/IP, SONET, ATM, optical, electrical, and the like).
  • the transmitter and receiver interface may share circuit components, software, or firmware, or alternatively may be implemented separately.
  • a network node 160 is provided and is configured to perform the method steps described herein.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de gestion de la couverture radio d'un réseau non terrestre, NTN, dans une zone géographique effectuée par un nœud de réseau, dans lequel la couverture radio dans la zone géographique est fournie par des cellules radio transportées par une pluralité de véhicules, le procédé comprenant la détection d'un premier ensemble de cellules radio, à partir d'une liste de cellules radio associées 5 à la zone géographique, qui ne sont plus capables de fournir une couverture efficace dans la zone géographique, dans laquelle la couverture efficace est définie par des seuils de qualité de couverture prédéfinis, et si les cellules qui ne fournissent plus de couverture efficace dans la zone géographique sont détectées : désactivation du premier ensemble de cellules radio, la désactivation consistant à libérer des ressources dans le nœud de réseau, détection d'un deuxième ensemble de cellules radio dans la liste des nœuds radio, 0 qui commencent à être capables de fournir une couverture efficace dans la zone géographique, et si des cellules qui commencent à être capables de fournir une couverture efficace dans la zone géographique sont détectées : activation du deuxième ensemble de cellules radio, l'activation consistant à allouer des ressources dans le nœud de réseau (Fig. 1) 5
PCT/SE2022/050589 2022-06-15 2022-06-15 Procédé de gestion de couverture radio d'un réseau non terrestre Ceased WO2023244144A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210105693A1 (en) * 2019-10-04 2021-04-08 Samsung Electronics Co., Ltd. Virtual tracking or registration areas for non terrestrial networks
EP3866504A1 (fr) * 2018-10-08 2021-08-18 Datang Mobile Communications Equipment Co., Ltd. Procédé de gestion de mobilité, réseau d'accès radioélectrique, terminal et support d'enregistrement informatique
WO2022087568A2 (fr) * 2020-10-22 2022-04-28 Qualcomm Incorporated Gestion de liste de cellules voisines dans des réseaux non terrestres

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3866504A1 (fr) * 2018-10-08 2021-08-18 Datang Mobile Communications Equipment Co., Ltd. Procédé de gestion de mobilité, réseau d'accès radioélectrique, terminal et support d'enregistrement informatique
US20210105693A1 (en) * 2019-10-04 2021-04-08 Samsung Electronics Co., Ltd. Virtual tracking or registration areas for non terrestrial networks
WO2022087568A2 (fr) * 2020-10-22 2022-04-28 Qualcomm Incorporated Gestion de liste de cellules voisines dans des réseaux non terrestres

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