WO2021161264A1 - Procédés et nœuds permettant la réception simultanée sur des liaisons d'accès et de raccordement dans des nœuds iab - Google Patents

Procédés et nœuds permettant la réception simultanée sur des liaisons d'accès et de raccordement dans des nœuds iab Download PDF

Info

Publication number
WO2021161264A1
WO2021161264A1 PCT/IB2021/051205 IB2021051205W WO2021161264A1 WO 2021161264 A1 WO2021161264 A1 WO 2021161264A1 IB 2021051205 W IB2021051205 W IB 2021051205W WO 2021161264 A1 WO2021161264 A1 WO 2021161264A1
Authority
WO
WIPO (PCT)
Prior art keywords
psd
difference
node
power level
signals
Prior art date
Application number
PCT/IB2021/051205
Other languages
English (en)
Inventor
Chunhui Zhang
Peter Jakobsson
Muhammad Kazmi
Thomas Chapman
Torbjörn ELFSTRÖM
Fredrik Lundqvist
Lei BAO
Boris Dortschy
Behrooz MAKKI
Magnus ÅSTRÖM
Per-Erik Eriksson
Original Assignee
Telefonaktiebolaget Lm Ericsson (Publ)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Telefonaktiebolaget Lm Ericsson (Publ) filed Critical Telefonaktiebolaget Lm Ericsson (Publ)
Publication of WO2021161264A1 publication Critical patent/WO2021161264A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/08—Closed loop power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/10—Open loop power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/12—Outer and inner loops
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/30—TPC using constraints in the total amount of available transmission power
    • H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
    • H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range

Definitions

  • the present description generally relates to wireless communication systems and more specifically to handle simultaneous reception on backhaul and access links in Integrated Access and Backhaul (IAB) Nodes.
  • IAB Integrated Access and Backhaul
  • IAB Integrated Access Backhaul
  • 3GPP TR 38.874 there is an ongoing Work Item (WI) for Integrated Access Backhaul (IAB) based on earlier study item documented in 3GPP TR 38.874.
  • the purpose of IAB is to replace existing wired backhaul or wireless backhaul with flexible wireless backhaul using the existing 3GPP bands providing not only backhaul (BH) but also existing cellular services in the same node.
  • BH backhaul
  • the purpose is generally to reduce the cost for a wired backhaul, which in certain deployments could impose a large cost for the installation and operation of the Base Station (BS).
  • BS Base Station
  • Each IAB node in the chain of nodes acts as a child node towards the upstream IAB node and a parent node towards the downstream IAB node, as depicted in Figure 1.
  • Figure 1 illustrates the different IAB link types.
  • the IAB node can receive downlink (DL) parent BH traffic from a parent node, Uplink (UL) access traffic from a User Equipment (UE) and UL child BH traffic from a child node.
  • DL downlink
  • UL Uplink
  • UE User Equipment
  • a donor node e.g. donor IAB node
  • donor IAB node is an IAB node closest to a core network and is the only node connected to a wired backhaul, as depicted in Figure 2A.
  • Each IAB node holds a Distributed Unit (DU) function and a Mobile-Termination (MT) function as shown in the reference architecture in Figure 2B (see fig. 6.3.1-1 in 3GPP TR38.874, for example).
  • DU Distributed Unit
  • MT Mobile-Termination
  • the IAB-node connects to an upstream IAB-node or the IAB-donor.
  • the IAB-node establishes Radio Link Control (RLC) channels with UEs and MTs of downstream IAB-nodes.
  • RLC Radio Link Control
  • Figure 2B shows an IAB chain with two hops, where the IAB donor node is connected to the Core Network (CN) via fiber.
  • the IAB-MT is responsible for the backhaul communication to the parent IAB DU, denoted as parent IAB backhaul DL and backhaul UL (see Figure 1).
  • the IAB-DU is responsible for both UE access (access UL and access DL, see Figure 1), as well as the backhaul to the child IAB MT, including child IAB backhaul DL and backhaul UL.
  • the IAB-MT and IAB-DU at one IAB node could be receiving at the same time or transmit at the same time.
  • an IAB node may at the same time be receiving from access UL, parent IAB backhaul DL and child IAB backhaul UL, or any of the following combinations: [0009] Case 1 : IAB DU simultaneously receiving from the access UL (UE uplink) and UL Child BH.
  • Case 2 IAB MT and IAB DU simultaneously receiving from DL Parent BH and UL Access at the same receiver (UE uplink).
  • Case 3 IAB MT and IAB DU simultaneously receiving from both the parent IAB backhaul DL and child IAB backhaul UL.
  • transmit (TX) power of the DL Parent BH transmission is controlled by the parent IAB node, while TX power of the UL Child BH transmission and UL Access transmission is controlled by the IAB node.
  • TDM Time Division Multiplexing
  • the IAB-MT may transmit during periods of time and frequencies normally allocated for UE to BS transmissions, i.e. access UL.
  • the IAB node will operate the transmit power control on the IAB-MT TX power, similarly to a UE problem with existing solutions.
  • the IAB-MT transmitter of a child IAB backhaul UL transmitter may have lower TX dynamic range than UEs transmitting on access UL.
  • PSD power spectrum density
  • Rel Release
  • PSD difference In the scenarios as described above, two signals from different transmitters are received with a PSD difference (DR) at the same receiver.
  • the difference in the PSD may result from a power difference of the transmitters.
  • the PSD difference could be reduced or eliminated by adjusting the transmit power of one or more transmitters.
  • the maximum TX powers of LAB MT and UE may differ by a large margin.
  • the transmission power, and, the change in the transmission power are associated with inaccuracies or tolerances, e.g. UE relative TX power tolerance can be ⁇ 5dB even if the power change is up to 2 dB. Therefore, there is a need to mitigate the PSD difference problem.
  • Embodiments in this disclosure allow to mitigate or solve the PSD difference problem.
  • the receiver’ s dynamic range is compared to the receiver’ s PSD difference. Evaluation/measurement of the different signals’ received power may for example be performed by configuring the TDM operation of the separate links such that the PSD difference can be derived. Considering the likely modulation settings, the receiver’s PSD difference can be compared to the achievable receive (RX) dynamic range to decide if the receiver can handle the PSD difference (DR) or not.
  • RX achievable receive
  • a too high PSD difference e.g. DR > a threshold
  • information about such situation is transmitted to a higher node (e.g. IAB parent, donor node) so that e.g. a Space Division Multiplexing (SDM)/ Frequency Division Multiplexing (FDM) operation of the parent- and/or child-node and/or UE is avoided.
  • SDM Space Division Multiplexing
  • FDM Frequency Division Multiplexing
  • This solution requires specification of new signaling between the IAB node and its IAB parent and/or donor node.
  • an IAB node experiencing higher DR than the threshold may stop performing such operation, i.e.
  • a further solution applicable to only Case 1 could be to increase the signal-to-interference- plus-noise ratio (SINR) or RX power target for the UE power control in order to achieve similar PSD on the Access and Child BH link.
  • SINR signal-to-interference- plus-noise ratio
  • RX power target for the UE power control
  • Radio Frequency (RF) parameters on IAB MT or IAB DU can be adjusted as follows:
  • - Array antenna excitation (including tapering and disabling elements) of the IAB-MT transmitter may be adjusted to reduce the Equivalent Isotropically Radiated Power (EIRP);
  • EIRP Equivalent Isotropically Radiated Power
  • - Transceiver transmitter power of subarray may be adjusted
  • - Beamforming shape to tune EIRP (e.g. miss-direct by moving the peak away from the victim) may be adjusted;
  • - RX beamforming gain may be adjusted away from the transmitter with the higher received PSD if analog beamforming is implemented.
  • the high PSD noise to the low PSD signal could be reduced with additional filter attenuation in the digital domain.
  • the receiving IAB node may, e.g., perform successive interference cancellation on the received signals, a procedure known in the art. Thereby, the receiver starts by receiving the stronger signal, and based on the received data, constructs a model of the PSD interference in adjacent spectrum. This interference is then subtracted before the weaker signal is decoded.
  • the IAB node can apply spectrum planning in the scheduler such that weaker signals are further away in frequency from a strong interferer compared to stronger signals. Thereby, some of the problems may be reduced and system performance improved.
  • One special case, provided that sufficient spectrum exists, is to allocate a buffer between the stronger signal and the weaker signal.
  • the spectrum planning may involve signaling to other IAB nodes such that a spectrum allocation is agreed on beforehand to allow the IAB node to schedule other IAB nodes or UEs more optimally with this agreement in mind.
  • a method for simultaneous reception of different signals from different cells or the same cell at an IAB node may comprise: determining a power level difference for one or more pairs of received signals; determining if the power level difference of one or more pairs of the received signals is within a range of power levels; and in response to determining that the power level difference is not within the range, performing one of: adjusting one or more of transmission and reception parameters for one of transmitting and receiving signals and transmitting information about the power level difference to a network node.
  • Another method in a first network node may comprise: receiving information about a power level difference for one or more pairs of signals, from a second network node; comparing the received power level difference to a threshold; and based on the comparison, sending an adjustment configuration of one or more of transmission and reception parameters of the second network node, to the second network node.
  • some embodiments include a network node configured, or operable, to perform one or more functionalities (e.g. actions, operations, steps, etc.) as described herein.
  • the network node may comprise one or more communication interfaces configured to communicate with one or more other radio nodes and/or with one or more network nodes, and processing circuitry operatively connected to the communication interface, the processing circuitry being configured to perform one or more functionalities as described herein.
  • the processing circuitry may comprise at least one processor and at least one memory storing instructions which, upon being executed by the processor, configure the at least one processor to perform one or more functionalities as described herein.
  • the network node may comprise one or more functional modules configured to perform one or more functionalities as described herein.
  • some embodiments include a non-transitory computer- readable medium storing a computer program product comprising instructions which, upon being executed by processing circuitry (e.g., at least one processor) of the network node, configure the processing circuitry to perform one or more functionalities as described herein.
  • processing circuitry e.g., at least one processor
  • the signaling solution enables the IAB parent or donor node to avoid the problems related to the higher PSD difference experienced by the IAB child node;
  • the signaling solution also enables the IAB parent or donor node to assist the IAB child node to apply one or more mitigation techniques to serve other nodes when higher PSD difference is experienced by the IAB child node.
  • Figure 1 illustrates different IAB link types.
  • FIG. 2A illustrates a reference diagram for IAB architectures (SA mode).
  • Figure 2B illustrates a reference diagram for IAB architecture la (SA mode with NGC).
  • Figure 3 illustrates an exemplary scenario where an IAB node receives different signals simultaneously.
  • Figure 4 illustrates a receive signal power of different arriving directions (in-beam and out-of-beam).
  • Figure 5 illustrates an ADC dynamic range and associated PSD difference threshold.
  • Figure 6 is a flow chart of a method in a network node, in accordance with an embodiment.
  • Figure 7 is a flow chart of a method in a network node, in accordance with an embodiment.
  • Figure 8 illustrates one example of a wireless communications system in which embodiments of the present disclosure may be implemented.
  • Figures 9 and 10 are block diagrams that illustrate a wireless device according to some embodiments of the present disclosure.
  • Figures 11 and 12 are block diagrams that illustrate a network node according to some embodiments of the present disclosure
  • Figure 13 illustrates a virtualized environment of a network node, according to some embodiments of the present disclosure.
  • one LAB node receives three signals simultaneously, namely, the IAB node receives SI (the downlink signal from IAB parent node (IAB DU)), S2 (the uplink signal from IAB child node (IAB MT)) and S3 (the UE uplink signal from the IAB node access link).
  • SI the downlink signal from IAB parent node (IAB DU)
  • S2 the uplink signal from IAB child node (IAB MT)
  • S3 the UE uplink signal from the IAB node access link
  • the received power of each signal can be adjusted with the following methods:
  • the antenna array size of the transmitter or receiver could be adjusted so that the antenna gain could be changed.
  • the adjustment of the antenna array size will directly change the received power.
  • One space filter means only one beam can be optimized with antenna gain (in-beam) and any other beams will be sub-optimal beam formed (out-of-beam) for simultaneously receiving multiple signals. This also means there will be an additional PSD difference attributed by the space filter. This is illustrated in Figure 4; the highest gain beam is in-beam and all other side lobes are defined as out-of-beam. Table 1 below shows the PSD difference or dynamic range improvement corresponding to different tapering levels. Table 1: The in-beam direction to out-of-beam dynamic range improvement for several different tapering levels.
  • tapering means changing of the antenna array size.
  • the dynamic range improvement could be used to offset the un-desired PSD difference.
  • S3 from UE
  • NLOS Non-Line of Sight
  • the EIRP of a transmitter can be changed by adjusting the beam shape, i.e. from a pencil narrow beam to a wider beam, by applying different antenna phases and power scaling to the antenna elements that transmit SI, S2 or S3.
  • the effect of the change of beam shape will result in an EIRP change.
  • the power level on the receiver side will be adjusted.
  • the power of a transmitter could be reduced by adjusting the power in the digital domain or by changing the bias level of transmitter power amplifiers, i.e. the power amplifier operates at different power levels or analog gains.
  • A1 The SNR. threshold to decode a certain Quadrature Amplitude Modulation (QAM); [0083] A2: The budget for tolerating noise added by the ADC;
  • A3 Back-off margin to support higher modulation
  • A4 Margin for receiving different received power level signals
  • A5 Margin to tolerate more hardware related error, e.g. Automatic Gain Control (AGC) error, Gain/Offset error.
  • ADC Automatic Gain Control
  • Figure 5 illustrates an ADC dynamic range and a PSD difference threshold where the PSD difference threshold is associated with a part of the ADC dynamic range.
  • An example of using a PSD difference and a threshold, in order to decide whether to take the measures listed above may comprise the following steps:
  • Step 1 an LAB node measures signal levels of the received signals individually, such as SI, S2 and S3 signals;
  • Step 2 the LAB node gets/obtains a level tolerance range in the local LAB for the received signals, i.e. PI to P2;
  • Step 3 the LAB reports to a co-ordination unit what the received level should be controlled and adjusted according to the reported PI to P2.
  • Step 4 the LAB node uses the M1/M2/M3/M4 methods to adjust the received signal level.
  • Step 5 the LAB node checks any two of the 3 signals SI, S2 or S3 that could be adjusted within the reported range of PI to P2.
  • Step 6 the LAB node configures the relevant simultaneous receiving operation if the checking of step 5 is ok for any of the two signals.
  • Method 100 may be implemented in network node (or IAB node) 320 of Figure 8.
  • Method 100 comprises:
  • Step 110 determining a power level difference for one or more pairs of received signals
  • Step 120 determining if the power level difference of one or more pairs of the received signals is within a range of power levels
  • Step 130 in response to determining that that the power level difference is not within the range, performing one or more of: adjusting one or more of transmission and reception parameters for one of transmitting and receiving signals and transmitting information about the power level difference to a network node.
  • the IAB node may measure/determine the power level (gain, energy, etc.) of some or all received signals.
  • method 100 may comprise, in response to determining that the power level of a pair of received signals difference is within the range, configuring a receiver of the IAB node for simultaneously receiving the pair of signals.
  • the receiver may have shared or separated antenna panels and/or DSPs (digital signal processing units).
  • method 100 may further comprise obtaining the range of power levels from a local IAB node.
  • method 100 may further comprise reporting the range of power levels to a co-ordination unit.
  • adjusting one or more of transmission and reception parameters may comprise adjusting an antenna array size of a transmitter or receiver, adjusting a beam shape of a transmitter or a receiver, or, decreasing an output power of a transmitter.
  • adjusting the reception parameters may comprise applying different beamforming for two simultaneously received high power level signal and low power signal.
  • a command of the adjustment of the one or more of transmission and reception parameters is sent to a coordination unit.
  • the coordination unit is in either a local IAB node or remotely.
  • a certain IAB node configured to simultaneously receive signals from two or more transmitting nodes is further configured to transmit information related to the PSD difference (DR) between at least two signals to a target node.
  • transmitting nodes are DU of IAB parent node (e.g. Nodel), MT of IAB child node (e.g. Node2) and UE on access link (e.g. Node3) as shown in Figure 3.
  • the corresponding signals SI, S2 and S3 are received by NodeO from Nodel, Node2 and Node3 respectively.
  • the target node are any network nodes, such as the parent IAB parent node, donor IAB node, BS, etc.
  • NodeO can be configured to transmit information about the PSD difference for all combinations of pairs of the received signals or for one or more specific combinations of pairs, to the target node.
  • NodeO can be configured by the target node with the information about a set of signals whose PSD difference information is to be transmitted by NodeO.
  • NodeO can be configured by the target node to signal information related to one or more DR12, DR13 and DR23, which correspond to DR between powers of signals: (SI and S2), (SI and S3), and (S2 and S3), respectively.
  • NodeO can also be configured by the target node with the duration over which the PSD difference shall be estimated by NodeO.
  • NodeO can transmit the information about the PSD difference to the target node using different reporting mechanisms, for example: [0112] - NodeO is configured to transmit the information about the PSD difference to the target node periodically, e.g. once every X second. The periodicity of the transmission can be pre defined or configured by the target node.
  • NodeO is configured to transmit the information about the PSD difference to the target node only when one or more conditions are met, e.g. event triggered transmission or reporting.
  • the information is transmitted by NodeO based on a relation between DR (e.g. any of DR12, DR13 and DR23) and one or more thresholds. For example, if a magnitude of DR exceeds a certain threshold (Hpl), then NodeO transmits information to the target node (e.g. called herein as event El). If a magnitude of DR is below a certain threshold (Hp2), then NodeO transmits information to the target node (e.g. called herein as event E2).
  • Hpl a certain threshold
  • Hp2 a certain threshold
  • the thresholds can be pre-defmed or configured by the target node.
  • Each reported event may also be associated with certain actions for NodeO. For example, upon triggering event El, NodeO is required or recommended to stop the simultaneous reception of signals from two or more different transmitting nodes (e.g. from Node2 and Node3). Some pre-defmed priority rules can be considered for stopping the nodes from transmission. For instance, the stronger node may be stopped from transmission. However, in general, different nodes could be chosen as long as the issue is resolved. In another example, upon triggering event E2, NodeO is allowed or recommended to resume simultaneous reception of signals from two or more different transmitting nodes (e.g. from Node2 and Node3).
  • the information about the PSD difference transmitted to the target node may comprise one or more of the following: the value of the DR, information about the type of DR (e.g. DR12, etc.), information about the signals whose DR was estimated for triggering the event or for periodic reporting, the duration over which the DR was estimated, etc.
  • the target node uses the received information about the PSD difference from NodeO for one or more operational tasks.
  • tasks may comprise: configuring NodeO not to simultaneously receive signals from two or more nodes (Nodel, Node2 and Node3 e.g. if
  • radio resources e.g. slots, symbols, etc.
  • method 100 may further comprise the following steps: [0117]
  • the IAB node when determining the power level difference for one or more pairs of received signals, can determine a power spectrum density (PSD) difference between two signals, for the one or more pairs of the received signals.
  • PSD power spectrum density
  • the IAB node can send information related to the PSD difference of the one or more pairs of the received signals to a target node.
  • determining the PSD difference may comprise determining the PSD difference for a configured duration.
  • sending the information related to the PSD difference may comprise sending the information periodically or based on an event.
  • the event may comprise a comparison of the determined PSD difference with a threshold.
  • the IAB node may, in response to sending the information, receive a configuration related to receiving subsequent signals.
  • determining the PSD difference may comprise determining the PSD difference jointly with cross chain interference (CCI) measurements and cross link interference (CLI) measurements.
  • CCI cross chain interference
  • CLI cross link interference
  • sending the information related to the PSD difference may comprise sending the information in one of a Radio Resource Control (RRC) message, a FI AP message, in a Medium Access control (MAC) Control Element (CE) message, and a BAP protocol control message.
  • RRC Radio Resource Control
  • FI AP a Radio FI AP message
  • CE Medium Access control
  • BAP BAP protocol control message
  • the information related to the PSD difference may comprise one or more of a value of the PSD difference, information about the type of PSD difference, information about the signals whose PSD difference is estimated for triggering an event or for periodic reporting, a duration over which the PSD difference is estimated, or a range of PSD.
  • the PSD control can be an IAB-node local decision, for example:
  • the IAB node can perform M1-M4 to child IAB MT;
  • the IAB node can perform M1-M4 to UE;
  • the IAB node will not schedule simultaneous reception of parent IAB DU, child IAB MT and UE.
  • the PSD control can be coordinated in a centralized manner and the responsible network function can be located at a node in the Radio Access Network (RAN), for example at an IAB -donor-Centralized Unit (CU) or as a separated function residing in the core network (for example the Operation, Administration and Management (OAM function)).
  • RAN Radio Access Network
  • CU IAB -donor-Centralized Unit
  • OAM function Operation, Administration and Management
  • the coordination unit can be made aware of parameters such as the measured PSD, the IAB node receiver dynamic range, the parent IAB node and or child IAB node transmitter dynamic range, the parent IAB node and child IAB node transmit power dynamic range and the expected receive power range.
  • the PSD control may be a sub-function of the centralized interference coordination function.
  • the centralized unit can:
  • the IAB node can inform the parent node about multiplexing capability of, for example, parent DU DL, child MT UL and UE UL or parent DU UL, child MT DL and UE DL.
  • the parent IAB node can adjust the configuration of resource multiplexing.
  • the information about the PSD difference sent to the parent DU or the donor CU can comprise a range of possible values that the transmitter of the high-level PSD could back off to where each value could correspond to a specific bitrate for the receiver.
  • the parent DU can select, depending on the traffic situation, how much the transmitter should reduce its PSD in a coordinated way. A reduction of the transmitted PSD will reduce the corresponding link capacity.
  • the information about the PSD-difference and any other related information that is needed can be sent to the upstream nodes (parent DU, donor CU) with either RRC messages, FIAP messages, MAC CE messages or using the Bandwidth Allocation Protocol (BAP) control messages.
  • BAP Bandwidth Allocation Protocol
  • the evaluation of the PSD difference can be performed jointly with the cross chain interference (CCI) measurements and cross link interference (CLI) measurements.
  • CCI cross chain interference
  • CLI cross link interference
  • the measurement configuration can be provided in a centralized manner.
  • Mitigation mechanism to reduce high PSD signal interference to low PSD signal [0142] To reduce interference of a high PSD signal over a low PSD signal, the signals could be further digitally processed with an additional filter so that the high PSD signal noise could be further suppressed.
  • This filter operation could be in the time domain, for OFDM, since the signal quality will get impacted by leakage in the Fast Fourier Transform (FFT), due to, for instance, the doppler shift from UE signals.
  • FFT Fast Fourier Transform
  • the signals SI, S2 or S3 could be configured with different carriers. In this way, an additional channel filter could be applied. As such, an additional selectivity can be achieved to reduce the high PSD signal interference to a low PSD signal.
  • the receiving LAB node may apply techniques to reduce or cancel out interference, e.g., by performing successive interference cancellation on the received signals, a procedure known in the art. If the interference is not too strong such that the dynamic range in the receiver is exceeded, the received signal will contain both the signal and interferer within the received signal. By further using a mathematical model of the interference, it is possible to first decode the stronger signal and in a second step, recreate the interference arising from the decoded signal and to remove it from the weaker signal.
  • method 100 can further comprise the following steps:
  • the IAB node may configure a high power level signal and a low power level signal in different carriers, for mitigating noise interference or interference, when receiving the high power level signal and the low power level signal.
  • the IAB node may apply a digital filter when receiving a high power level signal and a low power level signal for mitigating noise interference or interference.
  • the IAB node may apply successive interference cancellation on a received high power level signal and low power level signal for mitigating noise interference or interference.
  • a method for reducing PSD in signals received at a network node may comprise the following set of steps:
  • signals could be arranged such that a signal that is deemed to suffer less from PSD is arranged in closer proximity to the interferer compared to a signal that is deemed to suffer more.
  • S2 interference with SI may be more problematic compared to S2 interference with S3, due to the larger dynamic range between SI and S2.
  • a more preferable configuration would be S2 - S3 - SI, allowing the IAB node to maintain receiving SI.
  • the new configuration relates to the power levels of the different signals as presented in Figure 3. The configuration clearly shows that the strongest and weakest signals should not be put next to each other.
  • a method for reducing PSD interference through scheduling may comprise the following steps:
  • the DU will receive UL backhaul (S2) and UE UL (S3) simultaneously with the MT receiving DL backhaul (SI).
  • SI UL backhaul
  • S2 and S3 are handled by the same analog frontend and Digital Signal Processing (DSP) and where the separation into downlink and uplink frames are done in the software, a large difference in the PSD level will cause interference such that the information in the interfered signal might be unable to be decoded.
  • DSP Digital Signal Processing
  • the existing different reference signals can be used if they are time scheduled so that they not are received at the same time.
  • the DU can estimate PI, the PSD of SI, by activating the measuring function when the MT is supposed to receive the Synchronization Signal Block (SSB)/Physical Broadcast Channel (PBCH) or Channel State information - Reference Signal (CSI-RS) on the backhaul downlink from the parent DU.
  • SSB Synchronization Signal Block
  • PBCH Physical Broadcast Channel
  • CSI-RS Channel State information - Reference Signal
  • the DU should not schedule any uplink (i.e. during the measurement period).
  • the DU can request sounding reference signal (SRS) from the child MT and measures P2, the PSD of S2.
  • the parent DU should not transmit in downlink during the SRS measurement and not schedule any UL from the UE.
  • the DU request the SRS from the child MT and measures P3, the PSD of S3.
  • the parent DU should not transmit in downlink during the SRS measurement and not schedule any UL from the MT.
  • the different PSDs (PI, P2 and P3) can be further processed as described in the previous examples, i.e. calculating the difference between PI, P2 and P3, etc.
  • the method comprises performing one or more of the following: a) Configuring the high power level and low level signals in different carriers; b) Applying a digital filter; c) Applying successive interference cancellation on the received signals.
  • Method 200 in a first network node, such as a target node (e.g. LAB donor node or a parent IAB node, or a base station) will be described.
  • Method 200 may be implemented in network node (or IAB node) 320 of Figure 8.
  • Method 200 comprises:
  • Step 210 receiving information about a power level difference for one or more pairs of signals, from a second network node;
  • Step 220 comparing the received power level difference to a threshold
  • Step 230 based on the comparison, sending an adjustment configuration of one or more of transmission and reception parameters of the second network node.
  • the second network node may be an IAB node, such as the IAB node of Figure 1.
  • the power level differences are associated with respective identifiers (IDs).
  • the first network node may receive the IDs or any other information related to the power level difference.
  • the first network node may receive a power spectral density (PSD) difference for the one or more pairs of signals, from the second network node.
  • PSD power spectral density
  • the adjustment of the one or more of transmission and reception parameters may comprise: adjusting an antenna array size of a transmitter or receiver of the second network node, adjusting a beam shape of a transmitter or a receiver of the second network node, decreasing an output power of a transmitter of the second network node, or applying different beamforming for two signals, a high power level signal and a low power signal, received simultaneously at the second network node.
  • FIG. 8 illustrates an example of a wireless network 300 that may be used for wireless communications.
  • Wireless network 300 includes UEs 310 and a plurality of radio network nodes 320 (e.g., Node Bs (NBs) Radio Network Controllers (RNCs), evolved NBs (eNBs), next generation NB (gNBs), etc.) directly or indirectly connected to a core network 330 which may comprise various core network nodes.
  • the network 300 may use any suitable radio access network (RAN) deployment scenarios, including Universal Mobile Telecommunication System (UMTS) Terrestrial Radio Access Network (UTRAN), and Evolved UMTS Terrestrial Radio Access Network (EUTRAN).
  • UEs 310 may be capable of communicating directly with radio network nodes 320 over a wireless interface.
  • UMTS Universal Mobile Telecommunication System
  • UTRAN Universal Mobile Telecommunication System
  • EUTRAN Evolved UMTS Terrestrial Radio Access Network
  • UEs may also be capable of communicating with each other via device-to-device (D2D) communication.
  • network nodes 320 may also be capable of communicating with each other, e.g. via an interface (e.g. X2 in LTE or other suitable interface).
  • UE 310 may communicate with radio network node 320 over a wireless interface. That is, UE 310 may transmit wireless signals to and/or receive wireless signals from radio network node 320.
  • the wireless signals may contain voice traffic, data traffic, control signals, and/or any other suitable information.
  • an area of wireless signal coverage associated with a radio network node 320 may be referred to as a cell.
  • a UE may be a wireless device, a radio communication device, target device, device to device (D2D) UE, machine type UE or UE capable of machine to machine communication (M2M), a sensor equipped with UE, iPAD, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), Universal Serial Bus (USB) dongles, Customer Premises Equipment (CPE) etc.
  • D2D device to device
  • M2M machine to machine communication
  • iPAD machine to machine communication
  • Tablet mobile terminals
  • smart phone laptop embedded equipped (LEE), laptop mounted equipment (LME), Universal Serial Bus (USB) dongles, Customer Premises Equipment (CPE) etc.
  • LEE laptop embedded equipped
  • LME laptop mounted equipment
  • USB Universal Serial Bus
  • CPE Customer Premises Equipment
  • the “network node” can be any kind of network node which may comprise of a radio network node such as a radio access node (which can include a base station, radio base station, base transceiver station, base station controller, network controller, gNB, NR BS, evolved Node B (eNB), Node B, Multi-cell/multicast Coordination Entity (MCE), relay node, access point, radio access point, Remote Radio Unit (RRU), Remote Radio Head (RRH), a multi standard BS (also known as MSR BS), etc.), a core network node (e.g., MME, SON node, a coordinating node, positioning node, MDT node, etc.), or even an external node (e.g., 3rd party node, a node external to the current network), etc.
  • a radio network node such as a radio access node (which can include a base station, radio base station, base transceiver station, base station controller, network controller, gNB
  • the network node may also comprise a test equipment.
  • the network node 320 may be an IAB node, a child IAB node, a parent IAB node or a IAB donor.
  • the IAB node 320 nay have components as a MT and/or DU (as illustrated in Figures 2 A and 2B).
  • network nodes 320 may interface with a radio network controller (not shown).
  • the radio network controller may control network nodes 320 and may provide certain radio resource management functions, mobility management functions, and/or other suitable functions.
  • the functions of the radio network controller may be included in the network node 320.
  • the radio network controller may interface with the core network node 340.
  • the radio network controller may interface with the core network node 340 via the interconnecting network 330.
  • the interconnecting network 330 may refer to any interconnecting system capable of transmitting audio, video, signals, data, messages, or any combination of the preceding.
  • the interconnecting network 330 may include all or a portion of a public switched telephone network (PSTN), a public or private data network, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), a local, regional, or global communication or computer network such as the Internet, a wireline or wireless network, an enterprise intranet, or any other suitable communication link, including combinations thereof.
  • PSTN public switched telephone network
  • LAN local area network
  • MAN metropolitan area network
  • WAN wide area network
  • Internet a local, regional, or global communication or computer network
  • wireline or wireless network such as the Internet
  • enterprise intranet an enterprise intranet, or any other suitable communication link, including combinations thereof.
  • the core network node 340 may manage the establishment of communication sessions and various other functionalities for wireless devices 310.
  • Examples of core network node 340 may include MSC, MME, SGW, PGW, O&M, OSS, SON, positioning node (e.g. E-SMLC), MDT node, etc.
  • Wireless devices 110 may exchange certain signals with the core network node 340 using the non-access stratum layer. In non-access stratum signaling, signals between wireless devices 310 and the core network node 340 may be transparently passed through the radio access network.
  • network nodes 320 may interface with one or more other network nodes over an internode interface. For example, network nodes 320 may interface each other over an X2 interface.
  • Network 300 may include any suitable number of wireless devices 310 and network nodes 320, as well as any additional elements suitable to support communication between wireless devices or between a wireless device and another communication device (such as a landline telephone).
  • the embodiments may be implemented in any appropriate type of telecommunication system supporting any suitable communication standards and using any suitable components and are applicable to any radio access technology (RAT) or multi-RAT systems in which the wireless device receives and/or transmits signals (e.g., data).
  • RAT radio access technology
  • multi-RAT multi-RAT
  • the embodiments may be applicable to any RAT, such as UTRA, E-UTRA, narrow band internet of things (NB-IoT), WiFi, Bluetooth, next generation RAT (NR, NX), 4G, 5G, LTE FDD/TDD, etc.
  • the communication system 300 may itself be connected to a host computer (see Figure 20 for example).
  • the network 300 (with the wireless devices 310 and network nodes 320) may be able to operate in LAA or unlicensed spectrum.
  • FIG. 9 is a schematic block diagram of the wireless device 310 according to some embodiments of the present disclosure.
  • the wireless device 310 includes circuitry 400 comprising one or more processors 410 (e.g., Central Processing Units (CPUs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), and/or the like) and memory 420.
  • the wireless device 310 also includes one or more transceivers 430 each including one or more transmitters 440 and one or more receivers 450 coupled to one or more antennas 460.
  • the processing circuitry 400 may be connected to an input interface 480 and an output interface 485.
  • the input interface 480 and the output interface 485 may be referred to as communication interfaces.
  • the wireless device 310 may further comprise power source 490.
  • the functionality of the wireless device 310 described above may be fully or partially implemented in software that is, e.g., stored in the memory 420 and executed by the processor(s) 410.
  • the processor 410 is configured to perform all the functionalities performed by the wireless device 310.
  • a computer program including instructions which, when executed by the at least one processor 410, causes the at least one processor 410 to carry out the functionality of the wireless device 310 according to any of the embodiments described herein is provided.
  • a carrier containing the aforementioned computer program product is provided.
  • the carrier is one of an electronic signal, an optical signal, a radio signal, or a computer readable storage medium (e.g., a non-transitory computer readable medium such as memory).
  • Figure 10 is a schematic block diagram of the wireless device 310 according to some other embodiments of the present disclosure.
  • the wireless device 310 includes one or more modules 495, each of which is implemented in software.
  • the module(s) 495 provide the functionality of the wireless device 310 described herein.
  • FIG 11 is a schematic block diagram of a network node 320 according to some embodiments of the present disclosure.
  • the network node 320 includes a processing circuitry 500 comprising one or more processors 510 (e.g., CPUs, ASICs, FPGAs, and/or the like) and memory 520.
  • the network node also comprises a network interface 530.
  • the network node 320 also includes one or more transceivers 540 that each include one or more transmitters 550 and one or more receivers 560 coupled to one or more antennas 570.
  • the functionality of the network node 320 described above may be fully or partially implemented in software that is, e.g., stored in the memory 520 and executed by the processor(s) 510.
  • the processor 510 can be configured to perform any steps of the methods 100 and 200 of Figures 6 and 7 respectively.
  • FIG 12 is a schematic block diagram of the network node 320 according to some other embodiments of the present disclosure.
  • the network node 320 includes one or more modules 580, each of which is implemented in software.
  • the module(s) 580 provide the functionality of the network node 320 described herein.
  • the module(s) 580 may comprise, for example, a determining module operable to perform steps 110 and 120 of Figure 6, a sending/transmitting module operable to perform step 130 of Figure 6 and step 230 of Figure 7, an adjusting module operable to perform 130 of Figure 6 a comparing module operable to perform step 220 of Figure 7, and a receiving module operable to perform 210 of Figure 7.
  • FIG. 13 is a schematic block diagram that illustrates a virtualized embodiment of the wireless device 310 or network node 320, according to some embodiments of the present disclosure.
  • a “virtualized” node 1200 is a network node 320 or wireless device 310 in which at least a portion of the functionality of the network node 320 or wireless device 310 is implemented as a virtual component (e.g., via a virtual machine(s) executing on a physical processing node(s) in a network(s)).
  • a virtual appliance 1220 implementing the methods or parts of the methods of some embodiments.
  • the one or more instance(s) runs in a cloud computing environment 1200.
  • the cloud computing environment provides processing circuits 1230 and memory 1290-1 for the one or more instance(s) or virtual applications 1220.
  • the memory 1290-1 contains instructions 1295 executable by the processing circuit 1260 whereby the instance 1220 is operative to execute the methods or part of the methods described herein in relation to some embodiments.
  • the cloud computing environment 1200 comprises one or more general-purpose network devices including hardware 1230 comprising a set of one or more processor(s) or processing circuits 1260, which may be commercial off-the-shelf (COTS) processors, dedicated Application Specific Integrated Circuits (ASICs), or any other type of processing circuit including digital or analog hardware components or special purpose processors, and network interface controlled s) (NICs) 1270, also known as network interface cards, which include physical Network Interface 1280.
  • the general-purpose network device also includes non-transitory machine readable storage media 1290-2 having stored therein software and/or instructions 1295 executable by the processor 1260.
  • the processor(s)/processing circuits 1260 execute the software/instructions 1295 to instantiate a hypervisor 1250, sometimes referred to as a virtual machine monitor (VMM), and one or more virtual machines 1240 that are run by the hypervisor 1250.
  • a hypervisor 1250 sometimes referred to as a virtual machine monitor (VMM)
  • VMM virtual machine monitor
  • a virtual machine 1240 is a software implementation of a physical machine that runs programs as if they were executing on a physical, non-virtualized machine; and applications generally do not know they are running on a virtual machine as opposed to running on a “bare metal” host electronic device, though some systems provide para-virtualization which allows an operating system or application to be aware of the presence of virtualization for optimization purposes.
  • Each of the virtual machines 1240, and that part of the hardware 1230 that executes that virtual machine 1240 be it hardware 1230 dedicated to that virtual machine 1240 and/or time slices of hardware 1230 temporally shared by that virtual machine 1240 with others of the virtual machine(s) 1240, forms a separate virtual network element(s) (VNE).
  • VNE virtual network element
  • the hypervisor 1250 may present a virtual operating platform that appears like networking hardware to virtual machine 1240, and the virtual machine 1240 may be used to implement functionality such as control communication and configuration module(s) and forwarding table(s), this virtualization of the hardware is sometimes referred to as network function virtualization (NFV).
  • NFV network function virtualization
  • CPE customer premise equipment
  • Different embodiments of the instance or virtual application 1220 may be implemented on one or more of the virtual machine(s) 1240, and the implementations may be made differently.
  • a carrier comprising the aforementioned computer program product.
  • the carrier is one of an electronic signal, an optical signal, a radio signal, or a computer readable storage medium (e.g., a non-transitory computer readable medium such as memory).
  • Some embodiments may be represented as a non-transitory software product stored in a machine-readable medium (also referred to as a computer-readable medium, a processor-readable medium, or a computer usable medium having a computer readable program code embodied therein).
  • the machine-readable medium may be any suitable tangible medium including a magnetic, optical, or electrical storage medium including a diskette, compact disk read only memory (CD-ROM), digital versatile disc read only memory (DVD-ROM) memory device (volatile or non-volatile), or similar storage mechanism.
  • the machine-readable medium may contain various sets of instructions, code sequences, configuration information, or other data, which, when executed, cause a processor to perform steps in a method according to one or more of the described embodiments.
  • Those of ordinary skill in the art will appreciate that other instructions and operations necessary to implement the described embodiments may also be stored on the machine-readable medium.
  • Software running from the machine-readable medium may interface with circuitry to perform the described tasks.

Landscapes

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

Abstract

L'invention concerne un procédé dans un réseau de raccordement d'accès intégré (IAB) permettant la réception simultanée de différents signaux provenant de différentes cellules ou de la même cellule au niveau d'un nœud IAB. Le procédé peut consister : à déterminer une différence de niveau de puissance pour une ou plusieurs paires de signaux reçus ; à déterminer si la différence de niveau de puissance d'une ou de plusieurs paires des signaux reçus se situe dans une plage de niveaux de puissance ; et en réponse à la détermination selon laquelle la différence de niveau de puissance ne se situe pas dans la plage, à effectuer : l'ajustement d'un ou de plusieurs paramètres d'émission et de réception pour l'un des signaux d'émission et de réception et/ou la transmission d'informations concernant la différence de niveau de puissance à un nœud de réseau. L'invention concerne également un nœud de réseau permettant la mise en œuvre de ce procédé.
PCT/IB2021/051205 2020-02-13 2021-02-12 Procédés et nœuds permettant la réception simultanée sur des liaisons d'accès et de raccordement dans des nœuds iab WO2021161264A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202062975885P 2020-02-13 2020-02-13
US62/975,885 2020-02-13

Publications (1)

Publication Number Publication Date
WO2021161264A1 true WO2021161264A1 (fr) 2021-08-19

Family

ID=74669212

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2021/051205 WO2021161264A1 (fr) 2020-02-13 2021-02-12 Procédés et nœuds permettant la réception simultanée sur des liaisons d'accès et de raccordement dans des nœuds iab

Country Status (1)

Country Link
WO (1) WO2021161264A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023061198A1 (fr) * 2021-10-15 2023-04-20 华为技术有限公司 Procédé et appareil de communication
WO2023083130A1 (fr) * 2021-11-12 2023-05-19 维沃移动通信有限公司 Procédé et dispositif de réglage d'interférence, et support de stockage lisible

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3443704A2 (fr) * 2016-05-13 2019-02-20 Telefonaktiebolaget LM Ericsson (PUBL) Architecture de réseau, procédés et dispositifs pour un réseau de communication sans fil
US10470136B1 (en) * 2018-08-10 2019-11-05 At&T Intellectual Property I, L.P. Downlink power control enhancements for multi-hop integrated access and backhaul
US20200045645A1 (en) * 2018-08-02 2020-02-06 At&T Intellectual Property I, L.P. Power control enhancements for multi-hop integrated access and backhaul
US20200045563A1 (en) * 2018-08-01 2020-02-06 Qualcomm Incorporated Techniques for selecting backhaul nodes for connecting to an integrated access and backhaul network

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3443704A2 (fr) * 2016-05-13 2019-02-20 Telefonaktiebolaget LM Ericsson (PUBL) Architecture de réseau, procédés et dispositifs pour un réseau de communication sans fil
US20200045563A1 (en) * 2018-08-01 2020-02-06 Qualcomm Incorporated Techniques for selecting backhaul nodes for connecting to an integrated access and backhaul network
US20200045645A1 (en) * 2018-08-02 2020-02-06 At&T Intellectual Property I, L.P. Power control enhancements for multi-hop integrated access and backhaul
US10470136B1 (en) * 2018-08-10 2019-11-05 At&T Intellectual Property I, L.P. Downlink power control enhancements for multi-hop integrated access and backhaul

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023061198A1 (fr) * 2021-10-15 2023-04-20 华为技术有限公司 Procédé et appareil de communication
WO2023083130A1 (fr) * 2021-11-12 2023-05-19 维沃移动通信有限公司 Procédé et dispositif de réglage d'interférence, et support de stockage lisible

Similar Documents

Publication Publication Date Title
US11316639B2 (en) Systems and methods for mapping DMRS configuration to phase noise tracking pilot for improved receiver performance
JP7366910B2 (ja) 自律的受信ビーム微調整および追従
WO2020144624A1 (fr) Configuration et communication de rapport de mesurage de cli
US11516688B2 (en) Terminal apparatus, base station apparatus, and communication method
US11622386B2 (en) Terminal apparatus, base station apparatus, and communication method
JP2021514137A (ja) 高信頼性のための変調およびコーディング方式ならびにチャネル品質インジケータ
US11616544B2 (en) Antenna management in dual connectivity
US20150350992A1 (en) Communication systems and methods
WO2014113941A1 (fr) Allocation de ressources dans un réseau de radiocommunication
US11653345B2 (en) Beam selection criteria for single carrier waveform
WO2019226085A1 (fr) Décalage de bordures de cellule pour bandes de fréquence multiples
WO2021161264A1 (fr) Procédés et nœuds permettant la réception simultanée sur des liaisons d'accès et de raccordement dans des nœuds iab
WO2019053630A1 (fr) Transmissions discontinues de signaux de synchronisation configurés
KR20180129423A (ko) 무선 통신 시스템에서 간섭을 관리하기 위한 장치 및 방법
WO2022236767A1 (fr) Échange d'informations de réseau pour la gestion d'interférence de liaison croisée avec des surfaces réfléchissantes intelligentes
US20230308894A1 (en) Mitigation of receiver saturation via beam adjustment
US11962359B2 (en) Detection of deployed time-domain duplexed repeaters
US20240014858A1 (en) Scheduling for multi-transmission reception point transmission with dynamic on-off switching
US20240243777A1 (en) Multiple access point (ap) association
US20230319728A1 (en) Techniques for indicating uplink power limit for full-duplex communications
US20230361895A1 (en) Enhanced inter-user-equipment sub-band cross link interference report
US20230362703A1 (en) Inter-operator, inter-base station cross-link interference mitigation
WO2023183725A1 (fr) Atténuation de saturation de récepteur par ajustement de faisceau
IL296245A (en) Network topology for sub-terahertz deployment
EP4205330A1 (fr) Configuration tdd adaptative robuste aux interférences avec multi-trp

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21706715

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21706715

Country of ref document: EP

Kind code of ref document: A1