WO2020249227A1 - Récupération d'interruption - Google Patents

Récupération d'interruption Download PDF

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Publication number
WO2020249227A1
WO2020249227A1 PCT/EP2019/065700 EP2019065700W WO2020249227A1 WO 2020249227 A1 WO2020249227 A1 WO 2020249227A1 EP 2019065700 W EP2019065700 W EP 2019065700W WO 2020249227 A1 WO2020249227 A1 WO 2020249227A1
Authority
WO
WIPO (PCT)
Prior art keywords
reduced activity
outage recovery
activity state
outage
recovery beam
Prior art date
Application number
PCT/EP2019/065700
Other languages
English (en)
Inventor
Ingo Viering
Ahmad AWADA
Irina-Mihaela BALAN
Jürgen Goerge
Original Assignee
Nokia Technologies Oy
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 Nokia Technologies Oy filed Critical Nokia Technologies Oy
Priority to PCT/EP2019/065700 priority Critical patent/WO2020249227A1/fr
Publication of WO2020249227A1 publication Critical patent/WO2020249227A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection

Definitions

  • the present disclosure relates to management of cellular communication networks.
  • Cellular communication systems comprise plural cells, each cell having a cell coverage area.
  • a coverage area of the overall cellular communication system is comprised of the coverage areas of the cells of the system.
  • Reliability of service provided to subscribers of a cellular communication system depends on overall availability of network coverage. This availability comprises the geographic extent of the network, as well as the frequency, or indeed rarity, of cases where malfunctions or errors cause coverage outages in areas normally within the geographic extent of the network.
  • an apparatus comprising at least one processing core, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to employ a set of beamforming beams in communication with user equipments in at least one cell controlled by the apparatus, configure at least one beamforming beam as at least one outage recovery beam, the at least one outage recovery beam not comprised in the set, obtain an indication of outage relating to network coverage, and responsive to the indication, activate the at least one outage recovery beam from an inactive state to a reduced activity state, and decide whether to activate a first outage recovery beam in the reduced activity state to a normal state responsive to receipt of a message relating to the first outage recovery beam in the reduced activity state.
  • a method comprising employing, by an apparatus, a set of beamforming beams in communication with user equipments in at least one cell controlled by the apparatus, configuring at least one beamforming beam as at least one outage recovery beam, the at least one outage recovery beam not comprised in the set, obtaining an indication of outage relating to network coverage, and responsive to the indication, activating the at least one outage recovery beam from an inactive state to a reduced activity state, and deciding whether to activate a first outage recovery beam in the reduced activity state to a normal state responsive to receipt of a message relating to the first outage recovery beam in the reduced activity state.
  • an apparatus comprising at least one processing core, at least one memory including computer program code, the at least one memory and the computer program code being configured to, with the at least one processing core, cause the apparatus at least to employ a set of beamforming beams in communication with at least one base station node, receive at least one beamforming beam as at least one outage recovery beam, in a reduced activity state, the at least one outage recovery beam not comprised in the set, and request activation of a first outage recovery beam in the reduced activity state into a normal state by transmission of a message relating to the first outage recovery beam in the reduced activity state.
  • a method comprising employing, in an apparatus, a set of beamforming beams in communication with at least one base station node, receiving at least one beamforming beam as at least one outage recovery beam, in a reduced activity state, the at least one outage recovery beam not comprised in the set, and requesting activation of a first outage recovery beam in the reduced activity state into a normal state by transmission of a message relating to the first outage recovery beam in the reduced activity state.
  • an apparatus comprising means for employing, by an apparatus, a set of beamforming beams in communication with user equipments in at least one cell controlled by the apparatus, means for configuring at least one beamforming beam as at least one outage recovery beam, the at least one outage recovery beam not comprised in the set, means for obtaining an indication of outage relating to network coverage, and responsive to the indication, for activating the at least one outage recovery beam from an inactive state to a reduced activity state, and means for deciding whether to activate a first outage recovery beam in the reduced activity state to a normal state responsive to receipt of a message relating to the first outage recovery beam in the reduced activity state.
  • a non- transitory computer readable medium having stored thereon a set of computer readable instructions that, when executed by at least one processor, cause an apparatus to at least employ, a set of beamforming beams in communication with user equipments in at least one cell controlled by the apparatus, configure at least one beamforming beam as at least one outage recovery beam, the at least one outage recovery beam not comprised in the set, obtain an indication of outage relating to network coverage, and responsive to the indication, activate the at least one outage recovery beam from an inactive state to a reduced activity state, and decide whether to activate a first outage recovery beam in the reduced activity state to a normal state responsive to receipt of a message relating to the first outage recovery beam in the reduced activity state.
  • an apparatus comprising means for employing, in an apparatus, a set of beamforming beams in communication with at least one base station node, means for receiving at least one beamforming beam as at least one outage recovery beam, in a reduced activity state, the at least one outage recovery beam not comprised in the set, and means for requesting activation of a first outage recovery beam in the reduced activity state into a normal state by transmission of a message relating to the first outage recovery beam in the reduced activity state.
  • a non-transitory computer readable medium having stored thereon a set of computer readable instructions that, when executed by at least one processor, cause an apparatus to at least employ, in an apparatus, a set of beamforming beams in communication with at least one base station node, receive at least one beamforming beam as at least one outage recovery beam, in a reduced activity state, the at least one outage recovery beam not comprised in the set, and request activation of a first outage recovery beam in the reduced activity state into a normal state by transmission of a message relating to the first outage recovery beam in the reduced activity state.
  • a computer program configured to cause an apparatus to perform at least the following, when run on at least one processing core: employ a set of beamforming beams in communication with user equipments in at least one cell controlled by the apparatus, configure at least one beamforming beam as at least one outage recovery beam, the at least one outage recovery beam not comprised in the set, obtain an indication of outage relating to network coverage, and responsive to the indication, activate the at least one outage recovery beam from an inactive state to a reduced activity state, and decide whether to activate a first outage recovery beam in the reduced activity state to a normal state responsive to receipt of a message relating to the first outage recovery beam in the reduced activity state.
  • a computer program configured to cause an apparatus to perform at least the following, when run on at least one processing core: employ a set of beamforming beams in communication with at least one base station node, receive at least one beamforming beam as at least one outage recovery beam, in a reduced activity state, the at least one outage recovery beam not comprised in the set, and request activation of a first outage recovery beam in the reduced activity state into a normal state by transmission of a message relating to the first outage recovery beam in the reduced activity state.
  • FIGURES 1A - 1C illustrate an example system in accordance with at least some embodiments of the present invention
  • FIGURE 2 illustrates examples of beam elevation in accordance with at least some embodiments of the present invention
  • FIGURE 3 illustrates an example apparatus capable of supporting at least some embodiments of the present invention
  • FIGURE 4 illustrates signalling in accordance with at least some embodiments of the present invention
  • FIGURE 5 is a flow graph of a method in accordance with at least some embodiments of the present invention.
  • FIGURE 6 is a flow graph of a method in accordance with at least some embodiments of the present invention.
  • a beamforming-capable base node is enabled to react to a coverage outage, due for example to a misconfigured base station, by activating one or more coverage recovery beams to cover, at least partly, a coverage hole resulting from the outage.
  • the coverage recovery beams may have an elevation aimed at reaching the coverage hole, and they may initially be started into a reduced activity state. They may subsequently be activated from the reduced activity state into a normal state responsive to a determination they are actually needed for communication.
  • FIGURES 1A - 1C illustrate an example system in accordance with at least some embodiments of the present invention.
  • a coverage area of a cellular cell, provided by base station 100 is flanked, on the left, by a set of cells controlled by base station 120, and on the right, a set of cells controlled by base station 130.
  • the cells controlled by base station 120 are cells 122, 124 and 126.
  • the cells controlled by base station 130 are 132, 134 and 136. Each of these cells may be served by one or more beams provided by the respective base stations 120, 130.
  • the base stations may be known as base nodes or base stations, depending on the specific technology used.
  • Base station 100 may provide a single cell or plural cells, much like base stations 120 and 130. In a simple case, base station 100 is configured to provide a single cell, covered by a single omnidirectional antenna arrangement.
  • the base stations 120, 130 are configured to employ a set of beamforming beams in communication with user equipments in at least one cell controlled by the respective base station.
  • the set may have one beam or more than one beam.
  • the beams of the set may be physically directed to the coverage area of the respective cell.
  • the beams in the set may be aimed partly downward, as will be discussed in more detail in connection with FIGURE 2.
  • the cells may be based on a suitable communication technology, such as, for example, long term evolution, LTE, or fifth generation, 5G, also known as new radio, NR.
  • the technology used supports beamforming, by which it is meant an ability to achieve a directionality to signal transmission and/or reception. Beamforming may be achieved by using suitable weights in combining signals from plural antenna elements, to obtain a constructive interference pattern in a desired direction and a destructive interference pattern in other directions. In principle, beamforming may mean simply that one direction is favoured in transmission and/or reception, complete elimination of other directions is not necessary to unlock energetic benefits of beamforming. Depending on the communication frequencies used, the gain from using beamforming may be relevant to making a communication system viable in terms of reducing the number of base station sites needed.
  • base station 100 has ceased to provide service, resulting in an outage of network coverage.
  • the outage is indicated with reference sign 101 in the figure.
  • User equipments, UEs, in this coverage outage area 101 may experience an interruption in service, in case they are not close enough to other cells to successfully re establish connectivity via these cells.
  • An outage may be the result of a technical failure in base station 100, such as an interruption in power supply, an error in configuring base station 100 or other aspects of the network, a changed environment such as a building erected which blocks signals from base station 100, or an energy-saving mode activated in base station 100, for example.
  • the outage may simply be a case where availability of service inside a building becomes poor.
  • Base stations 120 and 130 may obtain an indication of the outage relating to base station 100, for example via an inter-base station interface, such as an X2/Xn interface, or via other processes, such as from a number of UEs which attempt to re-establish their connectivity from the coverage outage area 101.
  • the failed base station may provide an alarm, for example via the inter-base station interface, when its radio parts fail, for example.
  • a base station may notice that handovers to base station 100 will begin to fail, implying there is an outage.
  • a base station may obtain the indication of the outage by receiving a message from another node, or a base station may obtain the indication of the outage by performing a determination based on information the base station has.
  • At least one of base station 120 and base station 130 may activate at least one outage recovery beam from an inactive state to a reduced activity state. This may take place automatically, without human intervention.
  • These outage recovery beams may be inactive in a state where there is no outage in the neighbourhood, only being activated to reduce the effects of coverage outage in the event a neighbouring cell or base station goes into outage.
  • inactive it is herein meant that no channels are transmitted or received via these beams. In detail, no system information and no synchronization signals are broadcast over these beams when they are in the inactive state.
  • the outage recovery beams may be preconfigured with directionality enabling a base station to activate them selectively as a response to the indication of outage. For example, where the indication of outage relates to coverage outage area 101, occurring in a coverage area of a cell or cells of base station 100, a base station may activate those outage recovery beams which are directed toward coverage outage area 101.
  • the outage recovery beams may be configured in base stations in the inactive state during non-outage operation, such that the base stations know the directional characteristics of these beams in advance. In some embodiments, a base station activates all of its outage recovery beams as a response to the indication of outage.
  • the outage recovery beams are not preconfigured statically in advance, but dynamically configured as a response to the indication of outage.
  • the reduced activity state may comprise that system information and synchronization signals are broadcast, but physical downlink control channels are not sent on the at least one outage recovery beam in the reduced activity state.
  • the transmitted system information may comprise master information block, MIB, and/or system information block 1, SIB1, only, for example.
  • the transmitted system information may comprise an indication the beam is in the reduced activity state and/or an indication the beam is an outage recovery beam.
  • the reduced activity state may additionally comprise that also physical downlink shared channels are not sent, and the base station does not listen for physical uplink shared channels or physical uplink control channels on an outage recovery beam in the reduced activity state.
  • the reduced activity state may allow sending paging messages to user equipments via the beam in the reduced activity state. Paging messages inform the UE of incoming calls, for example.
  • paging may be sent first over beams in the normal, that is, non-reduced state, and then over beams in the reduced activity state only in case a paged UE does not respond to the paging over the beams in the normal state. Paging would thus only be sent via the reduced activity-state beams, if the network has not received an answer to the paging signals for a certain time T nopaging.
  • the network may start a timer T nopaging when paging information is sent out, initially not via beams in the reduced activity state. The timer is stopped when the UE has replied.
  • FIGURE 1C illustrates outage recovery beams 128 of base station 120, and outage recovery beams 138 of base station 130. As can be seen from the figure, these recovery beams partly cover the geographic coverage outage area 101. A user equipment in coverage outage area 101 may receive the system information broadcast over these outage recovery beams 128, 138, and is able to obtain bidirectional communication sessions to the network via these beams, once they are activated into a normal, non-reduced state.
  • Base station 120, 130 may be configured to activate an outage recovery beam from the reduced activity state into the normal state as a response to a message relating to the outage recovery beam.
  • a UE may send a random access message, such as a random access preamble, using the outage recovery beam in the reduced activity state.
  • the message may comprise an indication that the outage recovery beam in the reduced state will soon be needed the indication received via a physical uplink control channel from a user equipment, or via an inter-base station interface from a neighboring base station. Where the physical uplink control channel is used, the message may include a measurement report from a user equipment, indicating that beams in normal mode are declining and the outage recovery beam in reduced activity mode will soon be needed by the UE.
  • the message may comprise an indication received over an inter-base station interface, such as the X2/Xn interface, that a handover to the outage recovery beam in reduced activity mode is requested.
  • the random access message may be sent as an initial access when initiating connection setup, as a response to paging, a beam failure recovery, or a radio resource control, RRC, connection re-establishment request after handover failure or radio link failure, for example.
  • RRC radio resource control
  • Base stations 120, 130 may be configured to keep track of how long outage recovery beams have been in the reduced activity state. In case a specific beam has been in the reduced activity state for a time period which exceeds a predetermined length, the base station may deactivate this beam back to the inactive state. This is logical, since that outage recovery beam apparently is not needed for coverage reasons and the interference caused into the system by transmitting the system information on this beam seems to serve no useful purpose. This also allows base stations to activate a broad range of outage recovery beams to the reduced activity state, to allow UEs to request the beams which are actually needed. The outage recovery beams in the reduced activity state produce only a relatively small amount of interference into the system, since most physical channels are absent in the reduced activity state.
  • the normal state in contrast, comprises that physical uplink and downlink shared channels are sent and received over the beam, and at least one physical downlink control channel is sent from the base station over the beam.
  • a user equipment, UE for its part may be configured to preferentially use beams in the normal mode when establishing or re-establishing connectivity to the network.
  • a UE may be configured to send the message, such as the random access message, concerning the outage recovery beam in the reduced activity mode only in case it cannot identify any suitable beam in the normal mode.
  • suitable beam in the normal mode it may be meant a beam fulfilling a preconfigureed condition, such as detection of a system information block from the beam at a power level exceeding a first threshold, or at a predicted block error rate below a second threshold.
  • the condition may be preconfigured by 3rd generation partnership project, 3GPP, specification, or it may be preconfigured in the system information.
  • a benefit of this arrangement is, that the outage recovery beams are not activated into normal mode, which causes more interference, unless really necessary. This may be an exception from a normal procedure, where a strongest beam is used for sending a random access message.
  • the UE may determine from an indication in the broadcasted system information, that a beam is in the reduced activity state, for example.
  • the UE may always use the strongest beam, even if this beam is in the reduced activity state, and include beam-level measurements in the random access message sent over this beam.
  • the base station would then be enabled to decide, whether to activate the beam to the normal state, or re-direct the UE to use another beam.
  • FIGURE 2 illustrates examples of beam elevation in accordance with at least some embodiments of the present invention.
  • the azimuthal angle, in degrees of beamforming beams of, for example, base station 120.
  • the elevation angle, in degrees is on the vertical axis.
  • the elevation angle is measured from vertically down, such that an angle of zero degrees would correspond to a beam pointing directly at the ground, and an elevation angle of 90 degrees corresponds to a beam oriented sideways, toward the horizon and not aligned downward from the antenna site.
  • the elevation angle shown in FIGURE 2 may be an electrical elevation angle; in addition, the whole antenna may use a mechanical elevation tilt.
  • the set of beamforming beams in communication with user equipments in at least one cell of the base station itself is aligned at an elevation angle of 80 degrees, meaning these beams are slightly angled downward, pointing from the, usually, elevated antenna site toward the coverage area of the cell or cells of the base station itself.
  • base stations use more than one elevation for beams in the set used for normal communication with cells controlled by the base station. In this regard, normal communication does not include coverage recovery actions in coverage areas of cells of other base stations.
  • outage recovery beams are illustrated at an elevation of 90 degrees.
  • the outage recovery beams may have different elevation angles than the set of beams the base station used for its own, normal cells.
  • the difference in elevation may be at least +4 degrees, such that the outage recovery beams are pointed less downward.
  • the difference is at least +5 degrees, and may be +10 degrees, as in FIGURE 2.
  • a technical effect of the difference in elevation is obtained in that the outage recovery beams are pointed toward the geographical region of the coverage outage area 101. If there was no difference in elevation, an unnecessarily large power would have to be used, as a large portion of the power would be wasted in the sense that the beams would be pointed toward the ground, rather than the actual outage.
  • changing the elevation of the set of beams used for the cells of the base station itself would result in an unpredictable effect on overall system performance, since the beams would lose their alignment with the primary cells of the base station, and interference would be transmitted into neighbouring cells. Thus, both the elevation difference and the reduced activity state are both aimed at controlling an interference impact of adapting to the outage.
  • merely increasing the power of the normal set of beams, at elevation 80 degrees in FIGURE 2 would result in increased interference and unwanted changes to cell boundaries, since these beams are not pointed toward the coverage outage area 101.
  • the interference produced by the beams in the reduced activity state may be still further reduced.
  • reduced activity state- beams may be coordinated among neighboring cells, such that coordination could be done by the failed cell or base station, by assigning an individual and coordinated time shift to sweeping patterns of the reduced activity state-beams to each neighbor cell.
  • beams in the reduced activity state may have a larger periodicity than the regular beams.
  • beams in the reduced activity state may only provide master information block, MIB, and SIB1 containing a random access channel, RACH, configuration.
  • the RACH configuration that is used for accessing the beams in the reduced activity state is provided by the network during initial attachment/registration.
  • the reduced activity state-beams do not need to provide SIB1.
  • MIB and/or SIB 1 may carry a flag indicating that it is transmitted over a beam in the reduced activity state.
  • the flag is encoded in the SSB ID.
  • paging may be sent via beams in the reduced activity state, since there may be no other way to contact UEs in the outage area 101.
  • FIGURE 3 illustrates an example apparatus capable of supporting at least some embodiments of the present invention.
  • device 300 which may comprise, for example, a mobile communication device such as a user equipment or, in applicable parts, a base station device.
  • processor 310 which may comprise, for example, a single- or multi-core processor wherein a single-core processor comprises one processing core and a multi-core processor comprises more than one processing core.
  • Processor 310 may comprise, in general, a control device.
  • Processor 310 may comprise more than one processor.
  • Processor 310 may be a control device.
  • a processing core may comprise, for example, a Cortex- A8 processing core manufactured by ARM Holdings or a Steamroller processing core designed by Advanced Micro Devices Corporation.
  • Processor 310 may comprise at least one Qualcomm Snapdragon and/or Intel Atom processor.
  • Processor 310 may comprise at least one application-specific integrated circuit, ASIC.
  • Processor 310 may comprise at least one field-programmable gate array, FPGA.
  • Processor 310 may be means for performing method steps in device 300.
  • a suitably programmed and configured processor 310 may be means for employing, configuring, obtaining, activating, receiving and/or requesting.
  • Processor 310 may be configured, at least in part by computer instructions, to perform actions.
  • a processor may comprise circuitry, or be constituted as circuitry or circuitries, the circuitry or circuitries being configured to perform phases of methods in accordance with embodiments described herein.
  • circuitry may refer to one or more or all of the following: (a) hardware-only circuit implementations, such as implementations in only analog and/or digital circuitry, and (b) combinations of hardware circuits and software, such as, as applicable: (i) a combination of analog and/or digital hardware circuit(s) with software/firmware and (ii) any portions of hardware processor(s) with software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and (c) hardware circuit(s) and or processor(s), such as a microprocessor(s) or a portion of a microprocessor(s), that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.
  • firmware firmware
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, a cellular network device, or other computing or network device.
  • Device 300 may comprise memory 320.
  • Memory 320 may comprise random- access memory and/or permanent memory.
  • Memory 320 may comprise at least one RAM chip.
  • Memory 320 may comprise solid-state, magnetic, optical and/or holographic memory, for example.
  • Memory 320 may be at least in part accessible to processor 310.
  • Memory 320 may be at least in part comprised in processor 310.
  • Memory 320 may be means for storing information.
  • Memory 320 may comprise computer instructions that processor 310 is configured to execute. When computer instructions configured to cause processor 310 to perform certain actions are stored in memory 320, and device 300 overall is configured to run under the direction of processor 310 using computer instructions from memory 320, processor 310 and/or its at least one processing core may be considered to be configured to perform said certain actions.
  • Memory 320 may be at least in part comprised in processor 310. Memory 320 may be at least in part external to device 300 but accessible to device 300.
  • Device 300 may comprise a transmitter 330.
  • Device 300 may comprise a receiver 340.
  • Transmitter 330 and receiver 340 may be configured to transmit and receive, respectively, information in accordance with at least one cellular or non-cellular standard.
  • Transmitter 330 may comprise more than one transmitter.
  • Receiver 340 may comprise more than one receiver.
  • Transmitter 330 and/or receiver 340 may be configured to operate in accordance with global system for mobile communication, GSM, wideband code division multiple access, WCDMA, 5G, long term evolution, LTE, IS-95, wireless local area network, WLAN, Ethernet and/or worldwide interoperability for microwave access, WiMAX, standards, for example.
  • Device 300 may comprise a near- field communication, NFC, transceiver 350.
  • NFC transceiver 350 may support at least one NFC technology, such as NFC, Bluetooth, Wibree or similar technologies.
  • Device 300 may comprise user interface, UI, 360.
  • UI 360 may comprise at least one of a display, a keyboard, a touchscreen, a vibrator arranged to signal to a user by causing device 300 to vibrate, a speaker and a microphone.
  • a user may be able to operate device 300 via UI 360, for example to accept incoming telephone calls, to originate telephone calls or video calls, to browse the Internet, to manage digital files stored in memory 320 or on a cloud accessible via transmitter 330 and receiver 340, or via NFC transceiver 350, and/or to play games.
  • Device 300 may comprise or be arranged to accept a user identity module
  • User identity module 370 may comprise, for example, a subscriber identity module, SIM, card installable in device 300.
  • a user identity module 370 may comprise information identifying a subscription of a user of device 300.
  • a user identity module 370 may comprise cryptographic information usable to verify the identity of a user of device 300 and/or to facilitate encryption of communicated information and billing of the user of device 300 for communication effected via device 300.
  • Processor 310 may be furnished with a transmitter arranged to output information from processor 310, via electrical leads internal to device 300, to other devices comprised in device 300.
  • a transmitter may comprise a serial bus transmitter arranged to, for example, output information via at least one electrical lead to memory 320 for storage therein.
  • the transmitter may comprise a parallel bus transmitter.
  • processor 310 may comprise a receiver arranged to receive information in processor 310, via electrical leads internal to device 300, from other devices comprised in device 300.
  • Such a receiver may comprise a serial bus receiver arranged to, for example, receive information via at least one electrical lead from receiver 340 for processing in processor 310.
  • the receiver may comprise a parallel bus receiver.
  • Device 300 may comprise further devices not illustrated in FIGURE 3.
  • device 300 may comprise at least one digital camera.
  • Some devices 300 may comprise a back-facing camera and a front-facing camera, wherein the back-facing camera may be intended for digital photography and the front- facing camera for video telephony.
  • Device 300 may comprise a fingerprint sensor arranged to authenticate, at least in part, a user of device 300.
  • device 300 lacks at least one device described above.
  • some devices 300 may lack a NFC transceiver 350 and/or user identity module 370.
  • Processor 310, memory 320, transmitter 330, receiver 340, NFC transceiver 350, UI 360 and/or user identity module 370 may be interconnected by electrical leads internal to device 300 in a multitude of different ways.
  • each of the aforementioned devices may be separately connected to a master bus internal to device 300, to allow for the devices to exchange information.
  • this is only one example and depending on the embodiment various ways of interconnecting at least two of the aforementioned devices may be selected without departing from the scope of the present invention.
  • FIGURE 4 illustrates signalling in accordance with at least some embodiments of the present invention.
  • On the vertical axes are disposed, from the left, base station 120, user equipment UE, base station 100 and, on the right, base station 130.
  • the UE is engaged in a communication session via base station
  • base station 100 determines it is going into outage, and as a response to the determination, it informs base stations 120 and 130 of the outage, phases 430. As an alternative way for base stations 120 and 130 to obtain the indication of outage, base station 120 and/or 130 may determine that base station 100 no longer responds to messaging over an inter-base station interface, such as X2/Xn. Following phase 430, base station 100 is in outage and session 410 is interrupted. [0060] As a response to the indication of outage, base station 120 activates outage recovery beam 440 into the reduced activity state. Base station 130 does likewise by activating outage recovery beam 450 into the reduced activity state. The UE receives system information broadcasted over outage recovery beam 440, and responsively transmits a random access message using outage recovery beam 440 to base station 120, phase 460, in an attempt to re-establish its interrupted session.
  • base station 100 determines it is going into outage, and as a response to the determination, base station 120 and/or 130 may determine that
  • Base station 120 processes the random access message in phase 470, and decides to activate outage recovery beam 440 into the normal state, enabling uplink and downlink communication with the UE, and re-establishment of the session.
  • the re- established session is illustrated in FIGURE 4 as session 480.
  • FIGURE 5 is a flow graph of a method in accordance with at least some embodiments of the present invention.
  • the phases of the illustrated method may be performed in a base station, for example, or in a control device configured to control the functioning thereof, when installed therein.
  • Phase 510 comprises employing, by an apparatus, a set of beamforming beams in communication with user equipments in at least one cell controlled by the apparatus.
  • Phase 520 comprises configuring at least one beamforming beam as at least one outage recovery beam, the at least one outage recovery beam not comprised in the set.
  • Phase 530 comprises obtaining an indication of outage relating to network coverage, and responsive to the indication, activating the at least one outage recovery beam from an inactive state to a reduced activity state.
  • the reduced activity state may be reduced compared to a normal state.
  • the normal state may comprise transmission of more physical channels on the outage recovery beam than the reduced activity state.
  • Phase 540 comprises deciding whether to activate a first outage recovery beam in the reduced activity state to a normal state responsive to receipt of a message relating to the first outage recovery beam in the reduced activity state.
  • the first outage recovery beam may be comprised in the at least one outage recovery beam.
  • FIGURE 6 is a flow graph of a method in accordance with at least some embodiments of the present invention.
  • the phases of the illustrated method may be performed in a user equipment, for example, or in a control device configured to control the functioning thereof, when installed therein
  • Phase 610 comprises employing, in an apparatus, a set of beamforming beams in communication with at least one base station nodes.
  • Phase 620 comprises receiving at least one beamforming beam as at least one outage recovery beam, in a reduced activity state, the at least one outage recovery beam not comprised in the set.
  • Phase 630 comprises requesting activation of a first outage recovery beam in the reduced activity state into a normal state by transmission of a message relating to the first outage recovery beam in the reduced activity state.
  • Receiving a beam as an outage recovery beam may comprise receiving in system information of the beam an indication the beam is an outage recovery beam.
  • the apparatus may be configured to request the activation as a response to a determination, by the apparatus, that the apparatus is in a coverage outage situation.
  • At least some embodiments of the present invention find industrial application in managing communication networks.

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

Abstract

Selon un aspect donné à titre d'exemple de la présente invention, l'invention concerne un appareil configuré au moins pour utiliser un ensemble de faisceaux de formation de faisceau en communication avec des équipements utilisateurs dans au moins une cellule commandée par l'appareil, configurer au moins un faisceau de formation de faisceau en tant qu'au moins un faisceau de récupération d'interruption, ledit au moins un faisceau de récupération d'interruption n'étant pas compris dans l'ensemble, obtenir une indication d'interruption relative à la couverture du réseau, et en réponse à l'indication, activer ledit au moins un faisceau de récupération d'interruption d'un état inactif à un état d'activité réduite, et décider s'il faut activer un premier faisceau de récupération d'interruption dans l'état d'activité réduite à un état normal en réponse à la réception d'un message relatif au premier faisceau de récupération d'interruption dans l'état d'activité réduite.
PCT/EP2019/065700 2019-06-14 2019-06-14 Récupération d'interruption WO2020249227A1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019032882A1 (fr) * 2017-08-09 2019-02-14 Idac Holdings, Inc. Procédés et systèmes de récupération et de gestion de faisceau

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2019032882A1 (fr) * 2017-08-09 2019-02-14 Idac Holdings, Inc. Procédés et systèmes de récupération et de gestion de faisceau

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