WO2024009129A1 - Mécanisme de repli associé à un ou plusieurs indicateurs de matrice de précodage (pmi) erronés - Google Patents

Mécanisme de repli associé à un ou plusieurs indicateurs de matrice de précodage (pmi) erronés Download PDF

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Publication number
WO2024009129A1
WO2024009129A1 PCT/IB2022/056256 IB2022056256W WO2024009129A1 WO 2024009129 A1 WO2024009129 A1 WO 2024009129A1 IB 2022056256 W IB2022056256 W IB 2022056256W WO 2024009129 A1 WO2024009129 A1 WO 2024009129A1
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WIPO (PCT)
Prior art keywords
indication
wrong
pmi
csi
network node
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PCT/IB2022/056256
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English (en)
Inventor
Hamza SOKUN
Faeman TAN
Hai Wang
Ahmed NOUAH
Rakesh KAPPOOR
Haomin LI
Shiguang Guo
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
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Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Priority to PCT/IB2022/056256 priority Critical patent/WO2024009129A1/fr
Publication of WO2024009129A1 publication Critical patent/WO2024009129A1/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
    • H04B7/0689—Hybrid systems, i.e. switching and simultaneous transmission using different transmission schemes, at least one of them being a diversity transmission scheme
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming

Definitions

  • the present disclosure relates to wireless communications, and in particular, to a fallback mechanism associated with wrong-Precoding Matrix Indicator(s) (PMI(s)).
  • 4G also referred to as Long Term Evolution (LTE)
  • 5G also referred to as New Radio (NR)
  • Such systems provide, among other features, broadband communication between network nodes, such as base stations, and mobile wireless devices (WD), as well as communication between network nodes and between WDs.
  • the physical downlink control channel PDCCH
  • PDCCH carries downlink control information, DCI. This information is used to perform network functionalities such as downlink scheduling assignments, and uplink scheduling grants. Due to this dependency of the network performance on DCI, improving both PDCCH capacity and PDCCH coverage may be important to achieve a better network performance.
  • UBF user-specific beamforming
  • An approach to implement UBF for PDCCH transmissions is to leverage the precoder matrix indicator, PMI, reported in wireless device channel state information, CSI, feedback for the selection of precoding.
  • the PMI may correspond to a specific precoder matrix selected by the UE from a precoder codebook based on downlink measurements.
  • the viability of the PMI-based UBF approach is affected by the reliability and availability of PMIs.
  • the reliability and availability of PMIs is difficult to ensure due the several reasons, including as 1) errors in the reported PMI due to poor wireless device detection on CSI reference signals, CSI-RS, 2) errors in the decoded PMI due to unreliable uplink control information, UCI, decoding, or 3) long CSI reporting duration that might cause wireless devices to use the outdated, wrong-PMI reports.
  • Using wrong-PMIs for the transmissions could lead to deterioration of the overall network performance, and eventually to the network dropping the wireless device.
  • Some embodiments advantageously provide methods, systems, and apparatuses for a fallback mechanism associated with wrong-PMI.
  • the present disclosure includes systems and methods for fallback that improve the robustness in the network, providing benefits of PDCCH UBF without deteriorating the baseline key performance indicators, KPIs.
  • the method implements a proactive approach to dealt with the wrong- PMI issue.
  • the embodiment does not use UBF for PDCCH transmissions, unless there is a real benefit against using CBF, to avoid the unnecessary risk of having wrong-PMIs.
  • the embodiment also uses CBF for aperiodic CSI trigger DCIs in the regions where CBF performs well (e.g., compared to UBF) and PDCCH coverage is not a concern.
  • the embodiment uses a different approach to handle wrong-PMIs at the cell-edges. Specifically, it does not fall back to CBF directly when wrong-PMI occurs in the regions where PDCCH coverage is a concern and PDCCH CBF does not work well. Instead, the embodiment uses the previous successful reported PMI first. If the previous successful reported PMI does not work either, then, the embodiment uses CBF as a last resort.
  • Examples of some of the advantages of various embodiments described herein include: 1. Improving the robustness in the network by adopting more adaptive and proactive approaches for the fallback algorithm, which enables the benefits of PDCCH UBF without deteriorating the baseline KPIs. This greatly affects the viability of PDCCH UBF in a positive way. 2. Improving PDCCH coverage and cell-edge throughput, since CBF is not used directly at cell edges where CBF is known to perform poorly compared to UBF. 3. Addressing implementation-specific concerns. Specifically, when there is no DL activity for a wireless device, the checking of time since last successful CSI report will not be active, since the wireless device validator will not be triggered.
  • a network node configured to communicate with a wireless device.
  • the network node includes processing circuitry.
  • the processing circuitry is configured to detect an occurrence of a wrong-Precoder Matrix Indicator, wrong-PMI, associated with the wireless device, and to select a severity level of the wrong-PMI from a plurality of pre-determined severity levels.
  • the processing circuitry is also configured to cause transmission of an indication of one of a plurality of beamforming configurations for Physical Downlink Control Channel, PDCH, transmission based at least on the selected severity level of the wrong-PMI.
  • the indication is based on an elapsed time since a previous Channel State Information, CSI, report exceeding a pre- determined time was successful.
  • the indication is based on a number of consecutive Upload Hybrid Automatic Repeat Request Discontinuous Transmissions, UL HARQ DTX, exceeding a pre-determined threshold. According to some embodiments of this aspect, the indication is based on detection of a CSI Discontinuous Transmission, CSI DTX. According to some embodiments of this aspect, the detection of an occurrence of a wrong-PMI includes increasing a beta offset for Channel State Information, CSI, link adaptation. According to some embodiments of this aspect, the indication corresponds to an Aperiodic-Channel State Information, A-CSI, trigger.
  • A-CSI Aperiodic-Channel State Information
  • the detection of an occurrence of a wrong-PMI includes determining that an i_11 value associated with a PMI report has changed, and observing a Discontinuous Transmission, DTX.
  • the indication is based on a number of consecutive Downlink Negative-Acknowledgements exceeding a pre-determined threshold.
  • the indication is based on a Control Channel Elements Aggregation Level, CCE-AL, of the transmission.
  • the plurality of beamforming configurations includes at least one of User-Specific Beamforming, UBF, and Common Beamforming, CBF.
  • a wireless device is provided.
  • the wireless device includes processing circuitry.
  • the processing circuitry is configured to receive an indication of one of a plurality of beamforming configurations for Physical Downlink Control Channel transmission, the indication being based on a severity level of a wrong-PMI associated with the wireless device.
  • the processing circuitry is also configured to communicate with a network node based on the indicated one of the plurality of beamforming configurations.
  • the indication is based on an elapsed time since a previous Channel State Information ,CSI, report exceeding a pre- determined time was successful.
  • the indication is based on a number of consecutive Upload Hybrid Automatic Repeat Request Discontinuous Transmissions, UL HARQ DTX, exceeding a pre-determined threshold.
  • the indication is based on a detection of a CSI Discontinuous Transmission, CSI DTX.
  • the indication corresponds to an Aperiodic-Channel State Information, A-CSI, trigger.
  • the indication is based on a number of consecutive Downlink Negative-Acknowledgements exceeding a pre- determined threshold.
  • the indication is based on a Control Channel Elements Aggregation Level, CCE-AL, of the transmission.
  • the plurality of beamforming configurations includes at least one of User-Specific Beamforming, UBF, and Common Beamforming, CBF.
  • a method performed on a network node configured to communicate with a wireless device includes detecting an occurrence of a wrong-Precoder Matrix Indicator, wrong-PMI, associated with the wireless device and selecting a severity level of the wrong-PMI from a plurality of pre-determined severity levels.
  • the method also includes causing transmission of an indication of one of a plurality of beamforming configurations for Physical Downlink Control Channel, PDCH, transmission based at least on the selected severity level of the wrong-PMI.
  • the indication is based on an elapsed time since a previous Channel State Information, CSI, report exceeding a pre- determined time was successful.
  • the indication is based on a number of consecutive Upload Hybrid Automatic Repeat Request Discontinuous Transmissions, UL HARQ DTX, exceeding a pre-determined threshold. According to some embodiments of this aspect, the indication is based on detection of a CSI Discontinuous Transmission, CSI DTX. According to some embodiments of this aspect, the detecting of an occurrence of a wrong-PMI includes increasing a beta offset for Channel State Information, CSI, link adaptation. According to some embodiments of this aspect, the indication corresponds to an Aperiodic-Channel State Information, A-CSI, trigger.
  • A-CSI Aperiodic-Channel State Information
  • the detecting of an occurrence of a wrong-PMI includes determining that an i_11 value associated with a PMI report has changed, and observing a Discontinuous Transmission, DTX.
  • the indication is based on a number of consecutive Downlink Negative-Acknowledgements exceeding a pre-determined threshold.
  • the indication is based on a Control Channel Elements Aggregation Level, CCE-AL, of the transmission.
  • the plurality of beamforming configurations include at least one of User-Specific Beamforming, UBF, and Common Beamforming, CBF.
  • a method performed on a wireless device includes receiving an indication of one of a plurality of beamforming configurations for Physical Downlink Control Channel transmission, the indication being based on a severity level of a wrong-PMI associated with the wireless device.
  • the method also includes communicating with a network node based on the indicated one of the plurality of beamforming configurations.
  • the indication is based on an elapsed time since a previous Channel State Information, CSI, report exceeding a pre- determined time was successful.
  • the indication is based on a number of consecutive Upload Hybrid Automatic Repeat Request Discontinuous Transmissions, UL HARQ DTX, exceeding a pre-determined threshold.
  • the indication is based on a detection of a CSI Discontinuous Transmission, CSI DTX.
  • the indication corresponds to an Aperiodic-Channel State Information, A-CSI, trigger.
  • the indication is based on a number of consecutive Downlink Negative-Acknowledgements exceeding a pre-determined threshold.
  • the indication is based on a Control Channel Elements Aggregation Level, CCE-AL, of the transmission.
  • the plurality of beamforming configurations includes at least one of User-Specific Beamforming, UBF, and Common Beamforming, CBF.
  • a computer readable medium storing executable program instructions.
  • the instructions When the instructions are executed, the instructions are configured to cause processing circuitry to detect an occurrence of a wrong-Precoder Matrix Indicator, wrong-PMI, associated with the wireless device and select a severity level of the wrong-PMI from a plurality of pre- determined severity levels.
  • the processing circuity also causes transmission of an indication of one of a plurality of beamforming configurations for Physical Downlink Control Channel, PDCH, transmission based at least on the selected severity level of the wrong-PMI.
  • a computer readable storage medium storing executable program instructions is provided.
  • FIG.1 is a flowchart exhibiting a method for a fallback algorithm for PDCCH UBF.
  • FIG.2 is a block diagram of network coverage of wireless devices, where the network is configured to use UBF and CBF.
  • FIG.3 is a schematic diagram of an example network architecture illustrating a communication system connected via an intermediate network to a host computer according to the principles in the present disclosure;
  • FIG.4 is a block diagram of a host computer communicating via a network node with a wireless device over an at least partially wireless connection according to some embodiments of the present disclosure;
  • FIG.5 is a flowchart illustrating example methods implemented in a communication system including a host computer, a network node and a wireless device for executing a client application at a wireless device according to some embodiments of the present disclosure;
  • FIG.6 is a flowchart illustrating example methods implemented in a communication system including a host computer, a network node and a wireless device for receiving user data at a wireless device according to some embodiments of the present disclosure;
  • FIG.7 is a flowchart illustrating example methods implemented in a communication system including a host computer,
  • Two considerations for improving viability of the PMI-based UBF are 1) how to detect wrong-PMIs, and 2) how to handle wrong-PMIs.
  • a two-way (using UBF with narrow beams and common beamforming (CBF) with wide beams) fallback algorithm for PMI-based Physical Downlink Shared Channel (PDSCH) UBF may be used.
  • An example process is as follows: A time counter is introduced for detecting whether a PMI is outdated. When this time counter is reached, the PMI is considered outdated and the network node, such as a gNB, uses CBF with wide beams rather than UBF with narrow beams for PDSCH transmissions.
  • one or more embodiments described herein address one or more issues described above.
  • one or more embodiments implement a fallback algorithm/method to improve the robustness in the network and provide benefits of PDCCH UBF without deteriorating the baseline KPIs, for example.
  • PMI Matrix Indicator
  • the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises,” “comprising,” “includes” and/or “including” when used herein, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
  • the joining term, “in communication with” and the like may be used to indicate electrical or data communication, which may be accomplished by physical contact, induction, electromagnetic radiation, radio signaling, infrared signaling or optical signaling, for example.
  • the term “coupled,” “connected,” and the like, may be used herein to indicate a connection, although not necessarily directly, and may include wired and/or wireless connections.
  • the general description elements in the form of “one of A and B” corresponds to A or B.
  • at least one of A and B corresponds to A, B or AB, or to one or more of A and B.
  • at least one of A, B and C corresponds to one or more of A, B and C, and/or A, B, C or a combination thereof.
  • network node can be any kind of network node comprised in a radio network which may further comprise any of base station (BS), radio base station, base transceiver station (BTS), base station controller (BSC), radio network controller (RNC), g Node B (gNB), evolved Node B (eNB or eNodeB), Node B, multi-standard radio (MSR) radio node such as MSR BS, multi-cell/multicast coordination entity (MCE), integrated access and backhaul (IAB) node, relay node, donor node controlling relay, radio access point (AP), transmission points, transmission nodes, Remote Radio Unit (RRU) Remote Radio Head (RRH), a core network node (e.g., mobile management entity (MME), self-organizing network (SON) node, a coordinating node, positioning node, MDT node, etc.), an external node (e.g., 3rd party node, a node external to the current network), nodes in distributed antenna system (
  • BS base station
  • the network node may also comprise test equipment.
  • radio node used herein may be used to also denote a wireless device (WD) such as a wireless device (WD) or a radio network node.
  • WD wireless device
  • UE user equipment
  • the WD herein can be any type of wireless device capable of communicating with a network node or another WD over radio signals, such as wireless device (WD).
  • the WD may also be a radio communication device, target device, device to device (D2D) WD, machine type WD or WD capable of machine to machine communication (M2M), low-cost and/or low- complexity WD, a sensor equipped with WD, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles, Customer Premises Equipment (CPE), an Internet of Things (IoT) device, or a Narrowband IoT (NB-IOT) device, etc.
  • D2D device to device
  • M2M machine to machine communication
  • M2M machine to machine communication
  • Tablet mobile terminals
  • smart phone laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles
  • CPE Customer Premises Equipment
  • IoT Internet of Things
  • NB-IOT Narrowband IoT
  • Radio network node may comprise any of base station, radio base station, base transceiver station, base station controller, network controller, RNC, evolved Node B (eNB), Node B, gNB, Multi-cell/multicast Coordination Entity (MCE), IAB node, relay node, access point, radio access point, Remote Radio Unit (RRU) Remote Radio Head (RRH).
  • RNC evolved Node B
  • MCE Multi-cell/multicast Coordination Entity
  • IAB node Multi-cell/multicast Coordination Entity
  • RRU Remote Radio Unit
  • RRH Remote Radio Head
  • WCDMA Wide Band Code Division Multiple Access
  • WiMax Worldwide Interoperability for Microwave Access
  • UMB Ultra Mobile Broadband
  • GSM Global System for Mobile Communications
  • functions described herein as being performed by a wireless device or a network node may be distributed over a plurality of wireless devices and/or network nodes.
  • the functions of the network node and wireless device described herein are not limited to performance by a single physical device and, in fact, can be distributed among several physical devices.
  • all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
  • Some embodiments provide a fallback mechanism to improve the robustness of a network using user-specific beamforming.
  • a wrong-PMI issue is detected, and a severity level is selected.
  • An indication of one of a plurality of beamforming configurations for PDCH is transmitted based on the selected severity.
  • FIG.3 a schematic diagram of a communication system 10, according to an embodiment, such as a 3GPP-type cellular network that may support standards such as LTE and/or NR (5G), which comprises an access network 12, such as a radio access network, and a core network 14.
  • the access network 12 comprises a plurality of network nodes 16a, 16b, 16c (referred to collectively as network nodes 16), such as NBs, eNBs, gNBs or other types of wireless access points, each defining a corresponding coverage area 18a, 18b, 18c (referred to collectively as coverage areas 18).
  • Each network node 16a, 16b, 16c is connectable to the core network 14 over a wired or wireless connection 20.
  • a first wireless device (WD) 22a located in coverage area 18a is configured to wirelessly connect to, or be paged by, the corresponding network node 16a.
  • a second WD 22b in coverage area 18b is wirelessly connectable to the corresponding network node 16b. While a plurality of WDs 22a, 22b (collectively referred to as wireless devices 22) are illustrated in this example, the disclosed embodiments are equally applicable to a situation where a sole WD is in the coverage area or where a sole WD is connecting to the corresponding network node 16.
  • a WD 22 can be in simultaneous communication and/or configured to separately communicate with more than one network node 16 and more than one type of network node 16.
  • a WD 22 can have dual connectivity with a network node 16 that supports LTE and the same or a different network node 16 that supports NR.
  • WD 22 can be in communication with an eNB for LTE/E-UTRAN and a gNB for NR/NG-RAN.
  • the communication system 10 may itself be connected to a host computer 24, which may be embodied in the hardware and/or software of a standalone server, a cloud-implemented server, a distributed server or as processing resources in a server farm.
  • the host computer 24 may be under the ownership or control of a service provider, or may be operated by the service provider or on behalf of the service provider.
  • the connections 26, 28 between the communication system 10 and the host computer 24 may extend directly from the core network 14 to the host computer 24 or may extend via an optional intermediate network 30.
  • the intermediate network 30 may be one of, or a combination of more than one of, a public, private or hosted network.
  • the intermediate network 30, if any, may be a backbone network or the Internet.
  • the intermediate network 30 may comprise two or more sub-networks (not shown).
  • the communication system of FIG.3 as a whole enables connectivity between one of the connected WDs 22a, 22b and the host computer 24.
  • the connectivity may be described as an over-the-top (OTT) connection.
  • the host computer 24 and the connected WDs 22a, 22b are configured to communicate data and/or signaling via the OTT connection, using the access network 12, the core network 14, any intermediate network 30 and possible further infrastructure (not shown) as intermediaries.
  • the OTT connection may be transparent in the sense that at least some of the participating communication devices through which the OTT connection passes are unaware of routing of uplink and downlink communications.
  • a network node 16 may not or need not be informed about the past routing of an incoming downlink communication with data originating from a host computer 24 to be forwarded (e.g., handed over) to a connected WD 22a. Similarly, the network node 16 need not be aware of the future routing of an outgoing uplink communication originating from the WD 22a towards the host computer 24.
  • a network node 16 is configured to include a wrong-PMI detection unit 32, which is configured to perform one or more network node 16 functions described herein, including functions related to the detection and use of wrong-PMI such as for beamforming.
  • a wireless device 22 is configured to include a beamforming configuration unit 34 which is configured to perform one or more wireless device 22 functions as described herein, including one or more functions related to beamforming.
  • Example implementations, in accordance with an embodiment, of the WD 22, network node 16 and host computer 24 discussed in the preceding paragraphs will now be described with reference to FIG.4.
  • a host computer 24 comprises hardware (HW) 38 including a communication interface 40 configured to set up and maintain a wired or wireless connection with an interface of a different communication device of the communication system 10.
  • the host computer 24 further comprises processing circuitry 42, which may have storage and/or processing capabilities.
  • the processing circuitry 42 may include a processor 44 and memory 46.
  • the processing circuitry 42 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
  • processors and/or processor cores and/or FPGAs Field Programmable Gate Array
  • ASICs Application Specific Integrated Circuitry
  • the processor 44 may be configured to access (e.g., write to and/or read from) memory 46, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read- Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • memory 46 may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read- Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • Processing circuitry 42 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by host computer 24.
  • Processor 44 corresponds to one or more processors 44 for performing host computer 24 functions described herein.
  • the host computer 24 includes memory 46 that is configured to store data, programmatic software code and/or other information described herein.
  • the software 48 and/or the host application 50 may include instructions that, when executed by the processor 44 and/or processing circuitry 42, causes the processor 44 and/or processing circuitry 42 to perform the processes described herein with respect to host computer 24.
  • the instructions may be software associated with the host computer 24.
  • the software 48 may be executable by the processing circuitry 42.
  • the software 48 includes a host application 50.
  • the host application 50 may be operable to provide a service to a remote user, such as a WD 22 connecting via an OTT connection 52 terminating at the WD 22 and the host computer 24.
  • the host application 50 may provide user data which is transmitted using the OTT connection 52.
  • the “user data” may be data and information described herein as implementing the described functionality.
  • the host computer 24 may be configured for providing control and functionality to a service provider and may be operated by the service provider or on behalf of the service provider.
  • the processing circuitry 42 of the host computer 24 may enable the host computer 24 to observe, monitor, control, transmit to and/or receive from the network node 16 and or the wireless device 22.
  • the processing circuitry 42 of the host computer 24 may include a fallback unit 54 configured to enable the service provider to perform one or more functions described herein and/or at least one of communicate, store, forward, relay, determine, analyze, transmit, receive, etc.
  • the communication system 10 further includes a network node 16 provided in a communication system 10 and including hardware 58 enabling it to communicate with the host computer 24 and with the WD 22.
  • the hardware 58 may include a communication interface 60 for setting up and maintaining a wired or wireless connection with an interface of a different communication device of the communication system 10, as well as a radio interface 62 for setting up and maintaining at least a wireless connection 64 with a WD 22 located in a coverage area 18 served by the network node 16.
  • the radio interface 62 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
  • the communication interface 60 may be configured to facilitate a connection 66 to the host computer 24.
  • the connection 66 may be direct or it may pass through a core network 14 of the communication system 10 and/or through one or more intermediate networks 30 outside the communication system 10.
  • the hardware 58 of the network node 16 further includes processing circuitry 68.
  • the processing circuitry 68 may include a processor 70 and a memory 72.
  • the processing circuitry 68 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
  • processors and/or processor cores and/or FPGAs Field Programmable Gate Array
  • ASICs Application Specific Integrated Circuitry
  • the processor 70 may be configured to access (e.g., write to and/or read from) the memory 72, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • the network node 16 further has software 74 stored internally in, for example, memory 72, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the network node 16 via an external connection.
  • the software 74 may be executable by the processing circuitry 68.
  • the processing circuitry 68 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by network node 16.
  • Processor 70 corresponds to one or more processors 70 for performing network node 16 functions described herein.
  • the memory 72 is configured to store data, programmatic software code and/or other information described herein.
  • the software 74 may include instructions that, when executed by the processor 70 and/or processing circuitry 68, causes the processor 70 and/or processing circuitry 68 to perform the processes described herein with respect to network node 16.
  • processing circuitry 68 of the network node 16 may include wrong-PMI detection unit 32 configured to perform one or more network node 16 functions described herein, including functions related to the detection and use of wrong-PMI such as for beamforming .
  • the communication system 10 further includes the WD 22 already referred to.
  • the WD 22 may have hardware 80 that may include a radio interface 82 configured to set up and maintain a wireless connection 64 with a network node 16 serving a coverage area 18 in which the WD 22 is currently located.
  • the radio interface 82 may be formed as or may include, for example, one or more RF transmitters, one or more RF receivers, and/or one or more RF transceivers.
  • the hardware 80 of the WD 22 further includes processing circuitry 84.
  • the processing circuitry 84 may include a processor 86 and memory 88.
  • the processing circuitry 84 may comprise integrated circuitry for processing and/or control, e.g., one or more processors and/or processor cores and/or FPGAs (Field Programmable Gate Array) and/or ASICs (Application Specific Integrated Circuitry) adapted to execute instructions.
  • processors and/or processor cores and/or FPGAs Field Programmable Gate Array
  • ASICs Application Specific Integrated Circuitry
  • the processor 86 may be configured to access (e.g., write to and/or read from) memory 88, which may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • memory 88 may comprise any kind of volatile and/or nonvolatile memory, e.g., cache and/or buffer memory and/or RAM (Random Access Memory) and/or ROM (Read-Only Memory) and/or optical memory and/or EPROM (Erasable Programmable Read-Only Memory).
  • the WD 22 may further comprise software 90, which is stored in, for example, memory 88 at the WD 22, or stored in external memory (e.g., database, storage array, network storage device, etc.) accessible by the WD 22.
  • the software 90 may be executable by the processing circuitry 84.
  • the client application 92 may be operable to provide a service to a human or non-human user via the WD 22, with the support of the host computer 24.
  • an executing host application 50 may communicate with the executing client application 92 via the OTT connection 52 terminating at the WD 22 and the host computer 24.
  • the client application 92 may receive request data from the host application 50 and provide user data in response to the request data.
  • the OTT connection 52 may transfer both the request data and the user data.
  • the client application 92 may interact with the user to generate the user data that it provides.
  • the processing circuitry 84 may be configured to control any of the methods and/or processes described herein and/or to cause such methods, and/or processes to be performed, e.g., by WD 22.
  • the processor 86 corresponds to one or more processors 86 for performing WD 22 functions described herein.
  • the WD 22 includes memory 88 that is configured to store data, programmatic software code and/or other information described herein.
  • the software 90 and/or the client application 92 may include instructions that, when executed by the processor 86 and/or processing circuitry 84, causes the processor 86 and/or processing circuitry 84 to perform the processes described herein with respect to WD 22.
  • the processing circuitry 84 of the wireless device 22 may include a beamforming configuration unit 34 configured to perform one or more wireless device 22 functions as described herein, including, for example, functions related to beamforming.
  • the inner workings of the network node 16, WD 22, and host computer 24 may be as shown in FIG.4 and independently, the surrounding network topology may be that of FIG.3.
  • the OTT connection 52 has been drawn abstractly to illustrate the communication between the host computer 24 and the wireless device 22 via the network node 16, without explicit reference to any intermediary devices and the precise routing of messages via these devices.
  • Network infrastructure may determine the routing, which it may be configured to hide from the WD 22 or from the service provider operating the host computer 24, or both.
  • the network infrastructure may further take decisions by which it dynamically changes the routing (e.g., on the basis of load balancing consideration or reconfiguration of the network).
  • the wireless connection 64 between the WD 22 and the network node 16 is in accordance with the teachings of the embodiments described throughout this disclosure.
  • One or more of the various embodiments improve the performance of OTT services provided to the WD 22 using the OTT connection 52, in which the wireless connection 64 may form the last segment. More precisely, the teachings of some of these embodiments may improve the data rate, latency, and/or power consumption and thereby provide benefits such as reduced user waiting time, relaxed restriction on file size, better responsiveness, extended battery lifetime, etc.
  • a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve.
  • the measurement procedure and/or the network functionality for reconfiguring the OTT connection 52 may be implemented in the software 48 of the host computer 24 or in the software 90 of the WD 22, or both.
  • sensors (not shown) may be deployed in or in association with communication devices through which the OTT connection 52 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software 48, 90 may compute or estimate the monitored quantities.
  • the reconfiguring of the OTT connection 52 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not affect the network node 16, and it may be unknown or imperceptible to the network node 16. Some such procedures and functionalities may be known and practiced in the art.
  • measurements may involve proprietary WD signaling facilitating the host computer’s 24 measurements of throughput, propagation times, latency and the like.
  • the measurements may be implemented in that the software 48, 90 causes messages to be transmitted, in particular empty or ‘dummy’ messages, using the OTT connection 52 while it monitors propagation times, errors, etc.
  • the host computer 24 includes processing circuitry 42 configured to provide user data and a communication interface 40 that is configured to forward the user data to a cellular network for transmission to the WD 22.
  • the cellular network also includes the network node 16 with a radio interface 62.
  • the network node 16 is configured to, and/or the network node’s 16 processing circuitry 68 is configured to perform the functions and/or methods described herein for preparing/initiating/maintaining/supporting/ending a transmission to the WD 22, and/or preparing/terminating/maintaining/supporting/ending in receipt of a transmission from the WD 22.
  • the host computer 24 includes processing circuitry 42 and a communication interface 40 that is configured to a communication interface 40 configured to receive user data originating from a transmission from a WD 22 to a network node 16.
  • the WD 22 is configured to, and/or comprises a radio interface 82 and/or processing circuitry 84 configured to perform the functions and/or methods described herein for preparing/initiating/maintaining/supporting/ending a transmission to the network node 16, and/or preparing/terminating/maintaining/supporting/ending in receipt of a transmission from the network node 16.
  • FIGS.3 and 4 show various “units” such as wrong-PMI detection unit 32, and beamforming configuration unit 34 as being within a respective processor, it is contemplated that these units may be implemented such that a portion of the unit is stored in a corresponding memory within the processing circuitry. In other words, the units may be implemented in hardware or in a combination of hardware and software within the processing circuitry.
  • FIG.5 is a flowchart illustrating an example method implemented in a communication system, such as, for example, the communication system of FIGS.3 and 4, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIG.4.
  • the host computer 24 provides user data (Block S100).
  • the host computer 24 provides the user data by executing a host application, such as, for example, the host application 50 (Block S102).
  • the host computer 24 initiates a transmission carrying the user data to the WD 22 (Block S104).
  • the network node 16 transmits to the WD 22 the user data which was carried in the transmission that the host computer 24 initiated, in accordance with the teachings of the embodiments described throughout this disclosure (Block S106).
  • FIG.6 is a flowchart illustrating an example method implemented in a communication system, such as, for example, the communication system of FIG.3, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS.3 and 4.
  • the host computer 24 provides user data (Block S110).
  • the host computer 24 provides the user data by executing a host application, such as, for example, the host application 50.
  • FIG.7 is a flowchart illustrating an example method implemented in a communication system, such as, for example, the communication system of FIG.3, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS.3 and 4.
  • the WD 22 receives input data provided by the host computer 24 (Block S116).
  • the WD 22 executes the client application 92, which provides the user data in reaction to the received input data provided by the host computer 24 (Block S118). Additionally or alternatively, in an optional second step, the WD 22 provides user data (Block S120). In an optional substep of the second step, the WD provides the user data by executing a client application, such as, for example, client application 92 (Block S122). In providing the user data, the executed client application 92 may further consider user input received from the user. Regardless of the specific manner in which the user data was provided, the WD 22 may initiate, in an optional third substep, transmission of the user data to the host computer 24 (Block S124).
  • a client application such as, for example, client application 92
  • the executed client application 92 may further consider user input received from the user. Regardless of the specific manner in which the user data was provided, the WD 22 may initiate, in an optional third substep, transmission of the user data to the host computer 24 (Block S124).
  • FIG.8 is a flowchart illustrating an example method implemented in a communication system, such as, for example, the communication system of FIG.3, in accordance with one embodiment.
  • the communication system may include a host computer 24, a network node 16 and a WD 22, which may be those described with reference to FIGS.3 and 4.
  • the network node 16 receives user data from the WD 22 (Block S128).
  • FIG.9 is a flowchart of an example process in a network node 16 according to one or more embodiments of the present disclosure.
  • One or more blocks described herein may be performed by one or more elements of network node 16 such as by one or more of processing circuitry 68 (including the wrong-PMI detection unit 32), processor 70, radio interface 62 and/or communication interface 60.
  • Network node 16 is configured to detect an occurrence of a wrong-Precoder Matrix Indicator, wrong- PMI, associated with the wireless device (Block S134). The network node 16 is also configured to select a severity level of the wrong-PMI from a plurality of pre- determined severity levels (Block S136). The network node 16 is also configured to cause transmission of an indication of one of a plurality of beamforming configurations for Physical Downlink Control Channel, PDCH, transmission based at least on the selected severity level of the wrong-PMI (Block S138). In one or more other embodiments, the indication is based on an elapsed time since a previous Channel State Information, CSI, report exceeding a pre-determined time was successful.
  • CSI Channel State Information
  • the indication is based on a number of consecutive Upload Hybrid Automatic Repeat Request Discontinuous Transmissions, UL HARQ DTX, exceeding a pre-determined threshold. In one or more other embodiments, the indication is based on detection of a CSI Discontinuous Transmission, CSI DTX. In one or more other embodiments, the detecting of an occurrence of a wrong-PMI includes increasing a beta offset for Channel State Information, CSI, link adaptation. In one or more other embodiments, the indication corresponds to an Aperiodic-Channel State Information, A-CSI, trigger.
  • the detecting of an occurrence of a wrong-PMI includes determining that an i_11 value associated with a PMI report has changed, and observing a Discontinuous Transmission, DTX.
  • the indication is based on a number of consecutive Downlink Negative- Acknowledgements exceeding a pre-determined threshold.
  • the indication is based on a Control Channel Elements Aggregation Level, CCE-AL, of the transmission.
  • the plurality of beamforming configurations include at least one of User-Specific Beamforming, UBF, and Common Beamforming, CBF.
  • FIG.10 is a flowchart of an example process in a wireless device 22 according to some embodiments of the present disclosure.
  • One or more blocks described herein may be performed by one or more elements of wireless device 22 such as by one or more of processing circuitry 84 (including the beamforming configuration unit 34), processor 86, radio interface 82 and/or communication interface 60.
  • Wireless device 22 is configured to receive an indication of one of a plurality of beamforming configurations for Physical Downlink Control Channel transmission where the indication is based on a severity level of a wrong-PMI associated with the wireless device (Block S140).
  • the wireless device 22 is also configured to communicate with a network node based on the indicated one of the plurality of beamforming configurations (Block S142).
  • the indication is based on an elapsed time since a previous Channel State Information, CSI, report exceeding a pre-determined time was successful. In one or more other embodiments, the indication is based on a number of consecutive Upload Hybrid Automatic Repeat Request Discontinuous Transmissions, UL HARQ DTX, exceeding a pre-determined threshold. In one or more other embodiments, the indication is based on a detection of a CSI Discontinuous Transmission, CSI DTX. In one or more other embodiments, the indication corresponds to an Aperiodic-Channel State Information, A-CSI, trigger. In one or more other embodiments, the indication is based on a number of consecutive Downlink Negative-Acknowledgements exceeding a pre-determined threshold.
  • A-CSI Aperiodic-Channel State Information
  • the indication is based on a Control Channel Elements Aggregation Level, CCE-AL, of the transmission.
  • the plurality of beamforming configurations includes at least one of User-Specific Beamforming, UBF, and Common Beamforming, CBF.
  • One or more wireless device 22 functions described below may be performed by one or more of processing circuitry 84, processor 86, beamforming configuration unit 34, etc. Some embodiments provide for avoidance of unnecessarily increasing complexity of addressing a wrong-PMI without sacrificing the benefits of PDCCH UBF. Different versions/embodiments of the fallback algorithm for different levels of severity of the wrong -PMI issue are described below. In one or more embodiments, a beam-forming indication is used and at least partially based on one of a number of different potential severity levels of a wrong-PMI issue.
  • a wrong-PMI may include a wrong beam (precoder) selection for UBF transmissions.
  • An incident may be called as wrong-PMI issue if the following two things happen at the same time: 1) the value of i_11 in the PMI-report changes, and, 2) after this change, DTX is observed.
  • the term i_11 is an index of the horizontal beam weights. Then, severity level of the wrong-PMI issue in the network may be determined based on the number of incidents of wrong-PMIs.
  • FIG.11 is a block diagram of potential severity levels of a wrong-PMI issue according to some embodiments of the present disclosure. Shown are a plurality of potential severity levels, including Ignorable, Low, Medium, and High. However, other severity levels may be used. Below are examples of how indications of beamforming configurations may be determined based on the severity level of a wrong-PMI in at least one embodiment. Some indications may be based at least in part on a control channel elements aggregation level, CCE-AL, of the transmission. While the examples below may reference severity levels in FIG.11, one or more other severity levels may be used.
  • CCE-AL control channel elements aggregation level
  • Severity level Ignorable ⁇ When PMI is available ⁇ If CCE-AL 1 is selected when PDCCH UBF is not considered, then there may not be room for PDCCH capacity improvement. There may be no benefit of using UBF. For all PDCCH transmissions, UBF is used. In one embodiment, CBF is used. ⁇ If CCE-AL 2 or 4 is selected when PDCCH UBF is not considered, then PDCCH coverage extension is not a concern and CBF can provide a reliable support. o For PDCCH transmissions, the recent CSI report for UBF can be used. o The time since the last successful CSI report is checked/determined.
  • CBF for PDCCH transmissions is used until the next successful CSI report is received. o The number of consecutive UL HARQ DTX are checked/determined. ⁇ If the number of consecutive UL HARQ DTX is greater than the predefined threshold value, then CBF for PDCCH transmissions is used until the next successful CSI report is received. o CSI DTX is checked/determined. ⁇ If CSI DTX is detected, then CBF for PDCCH transmissions is used until the next successful CSI report is received. ⁇ If CCE-AL 8 or 16 is selected when PDCCH UBF is not considered, then PDCCH coverage extension might be a concern and CBF might not provide reliable support.
  • the recent CSI report for UBF is used. o If the time since the last successful CSI report is greater than a predefined threshold value, the number of consecutive UL HARQ DTX is greater than a predefined threshold value, or CSI DTX is detected, then UBF with the previous successfully reported PMI for the PDCCH transmissions is used. o If on a subsequent check, the last successful CSI report is greater than a predefined threshold value, the number of consecutive UL HARQ DTX is greater than a predefined threshold value, or CSI DTX is detected, CBF is used for PDCCH transmissions until the next successful CSI report is received.
  • Severity level Low ⁇ When PMI is available ⁇ If CCE-AL 1 is selected when PDCCH UBF is not considered, then there may not be room for PDCCH capacity improvement. There may be no benefit of using UBF. For all PDCCH transmissions, CBF is used. ⁇ If CCE-AL 2 or 4 is selected when PDCCH UBF is not considered, then PDCCH coverage extension is not a concern and CBF can provide a reliable support. o For all A-CSI trigger DCIs, CBF is used, which may reduce the number of NACKs in case of wrong-PMI issue. It can also improve RLC ARQ DL success rate KPI compared with the case of UBF being impaired by wrong PMI.
  • the recent CSI report for UBF can be used. o The time since the last successful CSI report is checked/determined. ⁇ If the time since the last successful CSI report is greater than the predefined threshold value, then CBF for PDCCH transmissions is used until the next successful CSI report is received. o The number of consecutive UL HARQ DTX is checked/determined. ⁇ If the number of consecutive UL HARQ DTX is greater than the predefined threshold value, then CBF for PDCCH transmissions is used until the next successful CSI report is received. o The CSI DTX is checked/determined. ⁇ If CSI DTX is detected, then CBF for PDCCH transmissions is used until the next successful CSI report is received.
  • PDCCH coverage extension might be an issue and CBF might not provide reliable support.
  • the recent CSI report for UBF is used. o If the time since the last successful CSI report is greater than a predefined threshold value, the number of consecutive UL HARQ DTX is greater than the predefined threshold value, or CSI DTX is detected, then UBF with the previous successfully reported PMI for the PDCCH transmissions is used.
  • CBF is used for PDCCH transmissions until the next successful CSI report is received.
  • Severity level ⁇ Medium ⁇
  • the beta offset is increased for CSI link adaptation when PDCCH UBF is used. Increasing the beta offset enables more conservative or increased PMI detection accuracy and helps reduce the errors in the decoded PMIs on the network node 16 sides. ⁇ When PMI is available ⁇ If CCE-AL 1 is selected when PDCCH UBF is not considered, then there may not be room for PDCCH capacity improvement. There may be no benefit of using UBF.
  • CBF For all PDCCH transmissions, CBF is used. ⁇ If CCE-AL 2 or 4 is selected when PDCCH UBF is not considered, then PDCCH coverage extension is not a concern and CBF can provide a reliable support. o For all A-CSI trigger DCIs, CBF is used, which may reduce the number of NACKs in case of wrong-PMI issue. It can also improve RLC ARQ DL success rate KPI compared with the case of UBF being impaired by wrong PMI. o For all other wireless device-specific PDCCH transmissions, the recent CSI report for UBF can be used. o The time since the last successful CSI report is checked/determined.
  • CBF for PDCCH transmissions is used until the next successful CSI report is received. o The number of consecutive UL HARQ DTX is checked/determined. ⁇ If the number of consecutive UL HARQ DTX is greater than the predefined threshold value, then CBF for PDCCH transmissions is used until the next successful CSI report is received. o The number of consecutive DL NACKs is checked/determined.
  • network node 16 controls the PDSCH assignment sent to wireless devices 22 such that no DL NACK multiplexing happens in a desired/predefined consecutive number of UL slots where DL HARQ feedbacks are reported to allow unambiguous detection of DL DTX. If the number of consecutive DL HARQ DTXs exceeds a predefined threshold, the PMI used for PDCCH UBF is deemed invalid and CBF is used, i.e., CBF is used as the fallback option. o CSI DTX is checked/determined to be active.
  • CBF is used for PDCCH transmissions until the next successful CSI report is received.
  • CCE-AL 8 or 16 is selected when PDCCH UBF is not considered, then PDCCH coverage extension might be a concern/issue and CBF might not provide reliable support.
  • the recent CSI report for UBF is used.
  • the time since the last successful CSI report is greater than a predefined threshold value, the number of consecutive UL HARQ DTX is greater than a predefined threshold value, the number of consecutive DL HARQ DTX is greater than a predefined threshold value, or CSI DTX is detected, then UBF with the previous successfully reported PMI for the PDCCH transmissions is used.
  • the last successful CSI report is greater than a predefined threshold value, the number of consecutive UL HARQ DTX is greater than the predefined threshold value, the number of consecutive DL HARQ DTX is greater than the predefined threshold value, or CSI DTX is detected, CBF is used for PDCCH transmissions until the next successful CSI report is received.
  • Severity level High ⁇
  • the beta offset is increased for CSI link adaptation when PDCCH UBF is used. Increasing the beta offset enables more conservative PMI detection accuracy and helps reduce the errors in the decoded PMIs on the network node 16 sides. ⁇ A periodic CSI report is used. ⁇ When PMI is available ⁇ If CCE-AL 1 is selected when PDCCH UBF is not considered, then there may not be room for PDCCH capacity improvement. There is no benefit of using UBF. For all PDCCH transmissions, CBF is used. ⁇ If CCE-AL 2 or 4 is selected when PDCCH UBF is not considered, then PDCCH coverage extension is not a concern and CBF can provide a reliable support.
  • CBF is used, which may reduce the number of NACKs in case of wrong-PMI issue. It can also improve RLC ARQ DL success rate KPI compared with the case of UBF being impaired by wrong PMI.
  • the recent CSI report for UBF can be used. o The time since the last successful CSI report is checked/determined. ⁇ If the time since the last successful CSI report is greater than the predefined threshold value, then CBF for PDCCH transmissions is used until the next successful CSI report is received. o The number of consecutive UL HARQ DTX is checked/determined.
  • ⁇ If the number of consecutive UL HARQ DTX is greater than the predefined threshold value, then, CBF for PDCCH transmissions is used until the next successful CSI report is received. o The number of consecutive DL NACKs is checked/determined. ⁇ If the number of consecutive DL NACKs is greater than the predefined threshold value, then, network node 16 (e.g., network node 16 scheduler) controls the PDSCH assignment sent to wireless devices 22 such that no DL NACK multiplexing happens in a desired consecutive number of UL slots where DL HARQ feedbacks are reported to allow unambiguous detection of DL DTX.
  • network node 16 e.g., network node 16 scheduler
  • the PMI used for PDCCH UBF is deemed invalid and CBF is used, e.g., CBF is the fallback.
  • CBF CBF is checked/determined to be active. ⁇ If CSI DTX is detected to be active, then CBF is used for PDCCH transmissions until the next successful CSI report is received. ⁇ If CCE-AL 8 or 16 is selected when PDCCH UBF is not considered, then PDCCH coverage extension might be a concern and CBF might not provide reliable support. o For PDCCH transmissions, the recent CSI report for UBF is used.
  • the time since the last successful CSI report is greater than a predefined threshold value, the number of consecutive UL HARQ DTX is greater than the predefined threshold value, the number of consecutive DL HARQ DTX is greater than the predefined threshold value, or CSI DTX is detected, then UBF with the previous successfully reported PMI for the PDCCH transmissions is used.
  • the last successful CSI report is greater than a predefined threshold value, the number of consecutive UL HARQ DTX is greater than the predefined threshold value, the number of consecutive DL HARQ DTX is greater than the predefined threshold value, or CSI DTX is detected, CBF is used for PDCCH transmissions until the next successful CSI report is received.
  • the concepts described herein may be embodied as a method, data processing system, computer program product and/or computer storage media storing an executable computer program. Accordingly, the concepts described herein may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects all generally referred to herein as a “circuit” or “module.” Any process, step, action and/or functionality described herein may be performed by, and/or associated to, a corresponding module, which may be implemented in software and/or firmware and/or hardware. Furthermore, the disclosure may take the form of a computer program product on a tangible computer usable storage medium having computer program code embodied in the medium that can be executed by a computer.
  • Any suitable tangible computer readable medium may be utilized including hard disks, CD-ROMs, electronic storage devices, optical storage devices, or magnetic storage devices.
  • These computer program instructions may be provided to a processor of a general purpose computer (to thereby create a special purpose computer), special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks.
  • These computer program instructions may also be stored in a computer readable memory or storage medium that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instruction means which implement the function/act specified in the flowchart and/or block diagram block or blocks.
  • the computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. It is to be understood that the functions/acts noted in the blocks may occur out of the order noted in the operational illustrations. For example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality/acts involved.
  • Computer program code for carrying out operations of the concepts described herein may be written in an object oriented programming language such as Python, Java® or C++. However, the computer program code for carrying out operations of the disclosure may also be written in conventional procedural programming languages, such as the "C" programming language. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer.
  • the remote computer may be connected to the user's computer through a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider).
  • LAN local area network
  • WAN wide area network
  • Internet Service Provider an Internet Service Provider

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Abstract

L'invention concerne un procédé, un système et un appareil. Un mode de réalisation de l'invention concerne un nœud de réseau en communication avec un dispositif sans fil. Le nœud de réseau comprend un ensemble de circuits de traitement. L'ensemble de circuits de traitement est configuré pour détecter une occurrence d'un indicateur de matrice de précodeur erroné, PMI erroné, associé au dispositif sans fil. L'ensemble de circuits de traitement sélectionne un niveau de gravité du PMI erroné parmi une pluralité de niveaux de gravité prédéterminés. Le circuit de traitement provoque la transmission d'une indication d'une configuration parmi une pluralité de configurations de formation de faisceau pour une transmission de canal de commande de liaison descendante physique, PDCH, sur la base au moins du niveau de gravité sélectionné du PMI erroné.
PCT/IB2022/056256 2022-07-06 2022-07-06 Mécanisme de repli associé à un ou plusieurs indicateurs de matrice de précodage (pmi) erronés WO2024009129A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110222629A1 (en) * 2008-11-20 2011-09-15 Nokia Corporation Pre-coding for downlink control channel
WO2022131975A1 (fr) * 2020-12-15 2022-06-23 Telefonaktiebolaget Lm Ericsson (Publ) Transmission précodée de données

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110222629A1 (en) * 2008-11-20 2011-09-15 Nokia Corporation Pre-coding for downlink control channel
WO2022131975A1 (fr) * 2020-12-15 2022-06-23 Telefonaktiebolaget Lm Ericsson (Publ) Transmission précodée de données

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