Methods, network nodes, and wireless devices for beam squelching at a wireless device

Abstract

The present application relates to methods, network nodes, and wireless devices for beam suppression at a wireless device. A method for beam suppression at a wireless device performed by a network node is disclosed. The wireless device is configured to communicate with the network node. The method includes transmitting, to the wireless device, a reference signal for channel estimation of a set of beams. The method includes communicating control signaling between the network node and the wireless device, the control signaling indicating beam suppression of at least one beam in a first subset of beams that can be suppressed by the wireless device.

Description

Technical Field

[0001] This disclosure relates to the field of wireless communications. Specifically, it relates to methods for beam suppression at wireless devices, related network nodes, and related wireless devices. Background Technology

[0002] Multi-user massive multiple-input multiple-output (MIMO) communication presents challenges in frequency division duplex (FDD). For FDD, this can trigger a large number of channel state reports from radio devices (e.g., user equipment, UE). These channel state reports are inefficient and undesirable. Summary of the Invention

[0003] There is a need to reduce the number of CSI reports in FDD systems of 3GPP (3rd Generation Partnership Project) systems. Therefore, there is a need for apparatus and methods for channel state reporting at radio devices that mitigate, alleviate, or resolve the aforementioned drawbacks. Accordingly, this disclosure proposes a method for effective beam suppression targeting unrelated beams based on assistance from network nodes, which can be updated based on interference observed from other radio devices. This can result in enhanced channel state reporting, wherein the number of reports can be reduced without compromising quality or with an acceptable quality reduction.

[0004] A method for beam suppression at a wireless device, performed by a network node, is disclosed. The wireless device is configured to communicate with the network node. The method includes sending a reference signal to the wireless device for channel estimation of a beam set. The method also includes transmitting control signaling between the network node and the wireless device, the control signaling indicating beam suppression of at least one beam in a first subset of beams that can be suppressed by the wireless device.

[0005] In addition, a network node is provided, the network node including memory circuitry, processor circuitry, and a wireless interface, wherein the network node is configured to perform the methods disclosed herein.

[0006] The advantage of this disclosure is that the disclosed network node can align beam suppression operations with the wireless device, for example, enabling or disabling beam suppression for one or more beams. Therefore, based on assistance from the network node, more effective beam suppression targeting relevant beams can be provided, which can be updated, for example, based on interference observed from other wireless devices. This can thus improve the channel state reports received by the network node. Furthermore, this provides enhanced channel state reporting (e.g., Channel State Information (CSI) reports) because the number of channel state reports can be reduced without compromising quality or with an acceptable quality degradation.

[0007] Furthermore, a method for beam suppression performed by a wireless device at the wireless device is disclosed. The wireless device is configured to communicate with a network node. The method includes receiving a reference signal from the network node for channel estimation of a beam set. The method also includes transmitting control signaling between the network node and the wireless device, the control signaling indicating beam suppression of at least one beam in a first subset of beams that can be suppressed by the wireless device.

[0008] Furthermore, a wireless device is provided, the wireless device including memory circuitry, processor circuitry, and a wireless interface, wherein the wireless device is configured to perform the methods disclosed herein.

[0009] The advantage of this disclosure is that the disclosed wireless device can benefit from more efficient beam suppression targeting the relevant beam, based on assistance from network nodes. This assistance can be updated, for example, based on potential interference observed from other wireless devices (such as potential interference that could be anticipated without any mitigation). The wireless device can then provide more efficient channel state reporting. Furthermore, this provides enhanced channel state reporting because the number of channel state reports can be reduced without compromising quality or with an acceptable quality degradation.

[0010] This disclosure advantageously provides a network node-assisted beam suppression that allows signaling to indicate that the beam is not suppressed in certain situations (e.g., when no interference from other wireless devices is observed), which can increase the amount of energy captured from the desired signal. Attached Figure Description

[0011] The above and other features and advantages of the present invention will become apparent to those skilled in the art from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings, in which:

[0012] Figure 1 This is a diagram illustrating an exemplary wireless communication system including an exemplary network node and an exemplary wireless device according to this disclosure.

[0013] Figures 2A to 2C This is a diagram illustrating an example channel state report on a beam set in a known wireless communication system.

[0014] Figures 3A to 3B This is a flowchart illustrating an example method for beam suppression at a wireless device, performed in a network node of a wireless communication system.

[0015] Figures 4A to 4B This is a flowchart illustrating an example method for beam suppression performed at a wireless device in a wireless communication system.

[0016] Figure 5This is a block diagram illustrating an example network node according to this disclosure.

[0017] Figure 6 This is a block diagram illustrating an example wireless device according to this disclosure, and

[0018] Figure 7 This is a signaling diagram illustrating an example message exchange between an example network node and an example wireless device for beam suppression at a wireless device, according to the present disclosure. Detailed Implementation

[0019] In the following description, various examples and details are illustrated with reference to the accompanying drawings. It should be noted that the drawings may be drawn to scale or not, and in all drawings, elements with similar structures or functions are indicated by similar reference numerals. It should also be noted that the drawings are intended only to facilitate the description of examples. They are not intended as an exhaustive description of this disclosure or as a limitation on the scope of this disclosure. Furthermore, the examples shown need not possess all the aspects or advantages shown. Aspects or advantages described in connection with a particular example are not necessarily limited to that example and can be practiced in any other example, even if not so shown or so explicitly described.

[0020] For clarity, the accompanying drawings are schematic and simplified, and they show only details that aid in understanding this disclosure, while other details are omitted. Throughout the drawings, the same reference numerals are used for the same or corresponding parts.

[0021] It is understood that this disclosure is presented from a system perspective. Assume a network node with P antenna ports is equipped with a codebook comprising N entries. For example, an entry can be considered a beam (e.g., a spatial filter), and P ports mean that the network node can transmit P beams simultaneously. For simplicity, P can be equal to N. For simplicity, let's assume K wireless devices, such as UEs, each with M antennas, and that all wireless devices can be expected to simultaneously serve a rank-1 transmission. Those skilled in the art will understand that rank > 1 transmissions can also be used. Rank transmissions can be considered as the number of MIMO layers.

[0022] For example, during the Sound Reference Signal (SRS) phase, the wireless device transmits the SRS signal in mutually orthogonal resources. For example, a network node listens to all P ports and uses a different codebook entry for each port. For example, after the SRS phase, the network node has information about a subset of codebook entries it can reach from the wireless device. For subsequent data transmission, the network node can discard all codebook entries for which SRS was not received. For simplicity, P is redefined to represent the number of codebook entries associated with data transmission.

[0023] For example, for FFD, since SRS is transmitted in the uplink UL band, network nodes cannot rely on reciprocity to obtain the downlink DL channel complex gain. Therefore, the network node transmits CSI-RS (where RS represents the reference signal) in P codebook entries and requests the radio device to report the channel complex gain. In other words, in the absence of noise, the P DL CSI-RS received at a given UE can be mathematically described using an Mx1 vector, for example:

[0024]

[0025] Among them, H mp Let h represent the channel gain at the m-th wireless device antenna with respect to the p-th CSI-RS. CSI feedback does not mean feeding back the entire vector h. p This is because it would result in overwhelming overhead. For example, as an alternative, the wireless device could select a 1×M beamforming vector g and base it on the filter value a. p =gh p Report.

[0026] For example, when a network node receives value a from K wireless devices p At that time, network nodes can have the complete CSI of the downlink channel:

[0027]

[0028] Among them, a k,p The value a of the k-th wireless device p For example, a network node can use, for instance, beam suppression to simultaneously serve all K wireless devices, such as through Moore-Penrose inversion of A. + Zero forcing can be viewed as a precoding technique that addresses interference problems by designing optimized criteria to minimize interference, such as multi-user interference, for example, by using a detection / precoding matrix that is a pseudo-inverse of the CSI matrix.

[0029] However, serving all K wireless devices simultaneously incurs overhead losses due to the wireless devices reporting all PCSI-RS values, which can be significant given the number of beams per wireless device and K. It is conceivable that wireless devices are configured to report CSI-RS feedback for each sub-band in a pre-configured set of sub-bands spanning the DL band (relative to the entire DL band). This further increases the overhead burden of CSI-RS feedback reporting.

[0030] To reduce reporting overhead, existing 3GPP technology requires network nodes to instruct each radio device individually how many CSI-RS reports it should submit. Radio devices using existing 3GPP technology can be configured to report CSI-RS on L=2, 3, or 4 beams of the network node. In other words, using matrix A, the network node can treat all unreported CSI-RS values ​​(e.g., PL unreported CSI-RS values) as zero, or at least ignore them.

[0031] Figure 1 This is a diagram illustrating an example wireless communication system 1 according to the present disclosure, including an example network node 400 and an example wireless device 300.

[0032] As discussed in detail herein, this disclosure relates to a wireless communication system 1, which includes a cellular system, such as a 3GPP wireless communication system, operating, for example, using FDD, such as in frequency range 1 (FR1). The wireless communication system 1 includes a wireless device 300 and / or a network node 400.

[0033] The network nodes disclosed herein refer to Radio Access Network (RAN) nodes operating in a radio access network, such as base stations, evolved Node Bs, eNBs, and gNBs in NRs. In one or more examples, an RAN node is a functional unit that can be distributed across several physical units.

[0034] The wireless communication system 1 described herein may include one or more wireless devices 300, 300A and / or one or more network nodes 400, such as one or more of the following: base station, eNB, gNB and / or access point.

[0035] Wireless devices can refer to mobile devices and / or user equipment (UE).

[0036] Wireless devices 300 and 300A can be configured to communicate with network node 400 via wireless link (or radio access link) 10 and 10A.

[0037] Figure 2A , Figure 2B , Figure 2C This is a schematic diagram showing an example channel state report on a beam set.

[0038] exist Figure 2A , Figure 2B , Figure 2C In this configuration, network node 400B can be configured to transmit CSI-RS#1, CSI-RS#2, CSI-RS#3, CSI-RS#4, CSI-RS#5, CSI-RS#6, CSI-RS#7, and CSI-RS#8 on the corresponding beams 1, 2, 3, 4, 5, 6, 7, and 8, respectively.

[0039] Network node 400B can configure wireless device 300B to report CSI-RS reports on L=4 beams. Assume that there are actually 4 strong CSI-RS beams reaching wireless device 300B, as shown by the solid lines, while the other P-4 CSI-RS beams reach wireless device 300B with negligible power and are ignored. Figure 2A In this context, network node 400B receives, for example, four strong reports regarding beams identified as beams 1, 2, 3, and 4, such as {X1dBm, X2dBm, X3dBm, X4dBm}, where X1>X2>X3>X4. For example, for the next reporting cycle, the network node can reduce the reports from wireless device 300B from four beams to, for example, two beams. Figure 2A As shown, when wireless device 300B is the only wireless device reporting CSI on beams 3 and 4 (because no other wireless device appears to be scheduled to use beams 3 and 4 to report CSI), network node 400B can configure wireless device 300B to report only the two strongest beams (e.g., the two beams showing the highest quality parameters in the CSI report, such as the two best beams). And network node 400B expects to receive reports only on, for example, beams 1 and 2. In other words, wireless device 300B can hear four strong beams and is able to report accurate feedback on the following four beams: 1, 2, 3, and 4. Network node 400B can choose any subset of the reporting beams used to communicate with wireless device 300B, such as beams 1 and 2. For example, wireless device 300B might be the only wireless device reporting channel status on beams 3 and 4, and network node 400B could simply ignore data transmission on beams 3 and 4. In other words, the net effect could be that although the wireless device 300B estimates four strong beams, reporting two beams is sufficient.

[0040] Several other wireless devices can use beams 1, 2, 3, and 4, such as Figure 2BAs shown. Wireless device 300C hears two strong beams, one of which is shared with wireless device 300B, and reports them. When selecting a subset of beams to communicate with wireless device 300B, network node 400B needs to consider interference to / from wireless device 300C, especially in near-far situations. After reporting CSI reports on the two strongest beams 1 and 2, network node 400B constructs its precoder assuming that the received power on beams 3 and 4 at wireless device 300B is zero or near zero, which could cause harmful interference to wireless device 300B, such as potentially destructive interference. In other words, if network node 400B uses beams 3 and 4 to transmit to other wireless devices such as 300C, this will cause interference at wireless device 300B. Unless wireless device 300B reports CSI on beams 1, 2, 3, and 4, network node 400B can ensure that no power on beams 3 and 4 reaches wireless device 300B (via precoding).

[0041] When a wireless device is equipped with a sufficient number of M antennas, beamforming can be used to address harmful situations. For example, a wireless device 300B equipped with M antennas can select vector g to make beams 3 and 4 null. For example, wireless device 300B can select a beamformer as, for example,

[0042]

[0043] In other words, wireless device 300B can apply beam suppression, such as zero-forcing, to beams 3 and 4 while maximizing the reported power in beams 1 and 2. As a result, wireless device 300B no longer reports X1dBm and X2dBm (X1>X2) to beams 1 and 2 respectively, but instead reports slightly smaller values. On the other hand, network node 400B ensures that negligible (potentially non-existent) interference reaches wireless device 300B through beams 3 and 4.

[0044] exist Figure 2C In this context, the wireless device 300B hears five strong beams (e.g., beams 1, 2, 3, 4, and 5) and is able to report accurate feedback for up to four beams (e.g., beams 1, 2, 3, and 4 indicated by solid lines) and coarse feedback for several other strong beams (e.g., beam 5 indicated by dashed lines). Figure 2CIn this process, wireless device 300D hears five strong beams (e.g., beams 1, 2, 3, 4, and 5) and can report accurate feedback for up to four beams (e.g., beams 2, 3, 4, and 5 indicated by solid lines) and coarse feedback for several other strong beams (e.g., beam 1 indicated by dashed lines). Based on this information, network node 400B can select a common set of beams for simultaneous communication with wireless devices 300B and 300D. For example, network node 400B can select beams 1, 2, 3, and 4 corresponding to CSI-RS#1, CSI-RS#2, CSI-RS#3, and CSI-RS#4. Alternatively, network node 400B can select beams corresponding to CSI-RS#2, CSI-RS#3, CSI-RS#4, and CSI-RS#5, or even other subsets of the reported beams. In other words, network node 400B can force wireless device 300D to report the same beam as wireless device 300B (and vice versa), although this is not the first choice for wireless device 300D. This allows network node 400B to precisely apply zero-forcing precoding that can serve both wireless device 300B and wireless device 300D simultaneously.

[0045] Figures 2A to 2C The challenge lies in the fact that the wireless device 300B is unaware of whether beam suppression (e.g., zero-forcing) is applied when calculating the reported values. The reported values ​​may be in the form of a precoding matrix indicator (PMI). Beam suppression information is only available at the network node 400B. If the network node 400B has observed that four strong beams are indeed arriving at the wireless device 300B, but these beams are not being used by other wireless devices (e.g., in the extreme case where the wireless device 300B is the only connected UE), applying beam suppression (e.g., zero-forcing) is not beneficial for the wireless device 300B. In fact, beam suppression may degrade performance due to the use of a suboptimal precoder and the consumption of additional power. Even without indication from the network node, the wireless device can still decide to apply beam suppression to the set of other strong beams, which may be suboptimal if no other wireless devices are serving the CSI-RS beams arriving at the wireless device.

[0046] Another challenge may arise when examining the set of DL-CSI RS beams transmitted by network nodes at specific periods. For example, the value of the DL CSI-RS period might be a few milliseconds, such as 5 milliseconds. (Note that during this time period, 70 OFDM symbols and 140 OFDM symbols could be transmitted if subcarrier spacing of 15 kHz and 30 kHz are used respectively.) In some cases, the period of the DL CSI-RS beam might be too large to adequately track changes in the propagation channel. However, this is not critical to the data transmitted by the network node to the UE using the DL CSI-RS beams reported by the radio device. This is because data transmission is accompanied by pilots, such as demodulation reference signals (DMRS) and tracking reference signals (TRS), which the radio device can use to update its current knowledge of the channel. However, in existing specifications, no pilots are available for the radio device to update its current knowledge of beam suppression (e.g., empty space). Therefore, increased multi-user interference is expected between DL CSI-RS beamouts, thus reducing the channel quality experienced by the radio device or network node when it cannot schedule traffic on the appropriate resources. Therefore, existing 3GPP technologies need to be improved because existing network nodes cannot assist radio devices in selecting appropriate beamforming operations during reporting, nor can they properly update their understanding of interference from other radio devices (such as concurrently scheduled users).

[0047] This disclosure allows network nodes to indicate beam suppression applicable to a subset of beams and to know which beam suppression (e.g., zero-forcing) a wireless device wants to apply, and more precisely, which beam (such as a DLCSI-RS beam) the wireless device needs to suppress or leave unsupplied. For example, knowing this information, the disclosed network node can prevent other wireless devices in a scheduled subset of beams (e.g., a subset reporting CSI-RS beams) from being suppressed by the wireless device. The disclosed network node can instruct the wireless device to apply or not apply beam suppression (e.g., zero-forcing) to a subset of beams (e.g., a first subset).

[0048] The disclosed technology provides, in particular, a technique for mitigating certain propagation paths between a network node and a wireless device by leveraging the inherent capabilities of wireless devices. In short, the disclosed network node can reduce channel state feedback from the wireless device by instructing the wireless device to perform beam suppression or, without resorting to the disclosed beam suppression instruction control signaling.

[0049] The beam suppression disclosed herein can be viewed as attenuating a beam carrying interfering signals to an acceptable level in order to mitigate interference. Examples of beam suppression techniques may include null-forcing techniques. Beam suppression may also be referred to herein as (multi)beam interference mitigation. Beam suppression can be used here to attenuate interference from unwanted beams to an acceptable level.

[0050] Figures 3A to 3B A flowchart is shown of an example method 100 for beam suppression at a wireless device, performed by a network node according to this disclosure. The wireless device is configured to communicate with the network node. The network node is one of the network nodes disclosed herein, such as... Figure 1 and Figure 5 Network node 400. Executable method 100 to mitigate beam interference.

[0051] Method 100 includes transmitting a reference signal for channel estimation of a beam set to a wireless device in step S104. The beam set can be viewed as a set of spatial filters, where each beam represents a spatial direction. The beam set can be viewed as a set of beams of a network node, such as beams radiated by the network node, such as downlink (DL) beams, such as transmit (Tx) beams. The beam set includes multiple beams.

[0052] A reference signal can be viewed as a signal used by a wireless device to estimate the channel quality of each beam in a beam set. The reference signal may include a Channel State Information Reference Signal (CSI-RS). In some examples, the reference signal may include a Demodulation Reference Signal (DMRS).

[0053] Method 100 includes transmitting S108 control signaling between a network node and a wireless device, the control signaling indicating beam suppression of at least one beam from a first subset of beams that can be suppressed by the wireless device. A beam that can be suppressed can be considered as a beam that is permitted, allowed, or preferably suppressed. In some embodiments, a beam that can be suppressed may include a beam that will be suppressed by the wireless device. It is understood that a beam suppressed by the wireless device does not result in a channel state report regarding the suppressed beam. For example, a channel state report may only indicate a strong beam, and the wireless device cannot consider the suppressed beam as a strong beam. In other words, the wireless device does not report the channel state on the suppressed beam in subsequent channel state reports. This may result in a reduction in the number of channel state reports from the wireless device to the network node.

[0054] The first subset of suppressable beams may include one or more beams that can be suppressed by wireless devices.

[0055] In one or more example methods, the control signaling indicating beam suppression may include control signaling instructing the wireless device whether to apply beam suppression, such as whether the wireless device wants to activate beam suppression. It is understood that beam suppression can be activated or deactivated by a network node, such as via S108, by means of ON or OFF.

[0056] This step S108 corresponds to the following... Figures 4A to 4B The wireless device shown performs step S206.

[0057] In one or more example methods, method 100 includes receiving a channel state report in S109 indicating channel state estimates for one or more remaining beams (excluding beams suppressed based on a first subset of beams). For example, a network node receives a subsequent channel state report indicating one or more remaining beams on a third subset of beams, which does not include beams suppressed based on the first subset of beams. It is understood that the resulting channel state report is reduced compared to the channel state report prior to beam suppression indicated in S108.

[0058] In one or more example methods, transmission S108 includes sending an instruction S108A to the wireless device: the wireless device will apply beam suppression to at least one beam in a first subset. The instruction by the wireless device to apply beam suppression to at least one beam in the first subset can be interpreted as a request for the wireless device to apply beam suppression to at least one beam in the first subset (e.g., a network node requests the wireless device to apply beam suppression to a first subset of beams). In other words, the network node can indicate to the wireless device in S108A that beam suppression will be activated by the wireless device. For example, the wireless device receiving the instruction in S108A will apply beam suppression to at least one beam in the first subset indicated in S108A. This step S108A corresponds to... Figures 4A to 4B The wireless device shown performs step S206A.

[0059] In one or more example methods, transmission S108 includes sending control signaling to the wireless device indicating one or more beam indices, such as one or more indices associated with a set of beams, corresponding to one or more beams that will be suppressed by the wireless device. Beam indices can be viewed as parameters that index beams in a set of beams or a group of beams, such as beam identifiers.

[0060] In one or more example methods, control signaling can implicitly indicate which beams will be suppressed by the wireless device. For example, the wireless device does not need to explicitly know which beams it is actually suppressing because the suppression-DRM configuration from the network node can be directly used by the wireless device as standard DMRS when it dynamically calculates its precoder (or equalizer). For example, if suppression-DMRS is not configured, then obviously no suppression is effective. For example, the implicit indication of beams could be the state of the DRMS ​​configuration, which could be the only information received by the wireless device based on the list of suppressable beams.

[0061] In one or more example methods, control signaling may instruct the wireless device to suppress as much as possible, such as suppressing as many beams as possible, such as suppressing as many beams as possible in a set of beams.

[0062] In one or more exemplary methods disclosed herein, the beam set may include P beams that can be indexed by the number 1-P. In other words, a network node may be configured to transmit CSI-RS on the beam set (e.g., on P beams). In one or more examples, the beam set may include 32 beams, such as Channel State Information Reference Signal (CSI-RS) beams, which can be indexed by the number 1-32. In other words, in the example given herein, P is 32. Here, the CSI-RS beams can be viewed as beams acting on network nodes transmitting CSI-RS from network nodes, for example, by broadcasting CSI-RS.

[0063] A network node can group a set of beams (e.g., 32 beams) into one or more groups, which may be referred to as one or more beam groups or a set of beams. Beam groups may have the same or different sizes, such as including the same or different numbers of beams. In some embodiments, a network node may determine the group based on reports from wireless devices (e.g., initially there may be a single group consisting of all beams).

[0064] In one or more example methods, transmitting S108 includes sending S108D control signaling to the wireless device, which indicates a set or more of beams that can be suppressed by the wireless device, wherein beams in a set of beams are considered to be suppressable (e.g., suppressed) when the wireless device does not report a beam in the channel state report. A beam not reported by the wireless device can here be considered as a beam not reported by the wireless device in the channel state report. The control signaling indicating a set or more of beams that can be suppressed by the wireless device can be considered as an indirect indication of suppression of unreported beams. In other words, in some embodiments, a first subset of beams in S108 can be indicated as a set or more of beams. For example, control signaling sent by a network node can indicate that beam groups with indices {{1-10}, {12-15}} are suppressable (e.g., group 1: {1-10} and group 2: {12-15}). In one or more example methods, the first subset of beams may include a beam group containing the following beam indices {{1-10}, {12-15}}. Control signaling may instruct that when the wireless device reports a CSI for any beam with an index in group {1-10} or group {12-15}, any unreported beam having an index in group {1-10} or group {12-15} and only in that group will be suppressed by the wireless device, for example, in a subsequent channel state report sent from the wireless device. No suppression is required when the wireless device reports a CSI for, for example, beam 17 out of 32 beams (e.g., with index 17), because beam index 17 does not indicate an index included in any beam group indicated as suppressable in the control signaling.

[0065] For example, a wireless device may report the CSI of four beams in a beam set, such as L=4. The wireless device may measure the CSI-RS of the beam set and may determine that the beams with corresponding indices 1, 2, 12, and 16 are the four beams with the highest channel quality (e.g., highest signal strength). For example, in a channel state report for beams 1-2 included in the exemplary beam group {1-10}, the wireless device therefore suppresses unreported beams in that group, such as beams indexed in the range 3 to 10 in subsequent channel state reports. For example, in a channel state report for a beam with index 12 included in the exemplary beam group {12-15}, the wireless device therefore suppresses unreported beams in that group, such as beams 13-15, in subsequent channel state reports. For example, in a channel state report for a beam with index 16, the wireless device does not suppress any beam because a beam with index 16 does not have an index included in any beam group that can be suppressed.

[0066] In some example methods, the network node may indicate the complete set of beam indices {1-32} as a single suppressable beam group in control signaling S108. Therefore, control signaling S108 may instruct the wireless device that it can suppress all beams in the beam set except for those reported as strong beams by the wireless device.

[0067] In one or more example methods, the network node may indicate in control signaling S108a the use of beam groups with one or more indices, such as beam groups with indices {1-10}. The network node can know that only beam indices {1-10} are associated with the beam pointing to the wireless device.

[0068] In one or more example methods, it can be envisioned that when control signaling indicates the complete set of beam indices, the wireless device can suppress as many beams as possible, such as all beams except those for which the wireless device has already reported CSI.

[0069] In one or more example methods, transmission S108 includes sending an S108C instruction to the wireless device that the network node does not support auxiliary beam suppression at the wireless device (e.g., the network node does not activate or deactivate beam suppression at the wireless device, e.g., the network node does not request beam suppression at the wireless device, e.g., the network node instructs the wireless device to turn off beam suppression). The network node may, for example, indicate in control signaling that the network is not transmitting pilot signals for suppression management, such as DMRS symbols. Therefore, the network node may not request the wireless device to suppress any beam. By indicating that the network node does not support auxiliary beam suppression, beam suppression can be indicated as inactive. When the network node has determined that the interference level on the beam is below a cost threshold, it may send an instruction that the network node does not assist in beam suppression, making the cost of applying beam suppression higher than the actual interference on the beam. In this case, applying beam suppression may not be beneficial for the wireless device.

[0070] In one or more exemplary methods, beam suppression can be applied by default to beams for which the indication indicating that the network node does not support beam suppression at the wireless device (e.g., beam suppression is OFF, such as not requiring, requiring, or requesting beam suppression) has not been signaled. Therefore, the network node can instruct the wireless device to stop suppressing such beams by sending an indication in S108C that the network node does not support beam suppression at the wireless device. In other words, in S108C, the network node can instruct the wireless device to stop applying beam suppression based on this indication.

[0071] This step S108C corresponds to, as per [the relevant information] Figures 4A to 4B Step S206B, performed by the wireless device.

[0072] In one or more example methods, method 100 includes sending an indication to the wireless device, S101, of the number of beams in the beam set from which the channel state report (CSI) is received from the wireless device. The network node may, for example, send to the wireless device in control signaling the number of beams, or any other number, from which the wireless device intends to report CSI. In other words, the network node may instruct the wireless device whether it intends to report CSI on 2, 3, or 4 beams in the beam set.

[0073] In one or more example methods, the network node may indicate different numbers of beams for UL and DL based on the capabilities of the wireless device. For example, the wireless device may support 4 DL streams (e.g., with 4 antennas and 4 receive chains), but only support 1 or 2 UL streams (4 antennas that may be fed by only 1 or 2 transmit chains).

[0074] This step S101 corresponds to the following... Figures 4A to 4B The wireless device shown performs step S201.

[0075] In one or more example methods, method 100 includes receiving, S106, a channel state report indicating a second subset of a beam set from a wireless device. The second subset may be an appropriate subset of the beam set. The second subset may include one or more beams. The channel state report S106 indicating the second subset is received before beam suppression is applied and can be used to determine beam suppression. This step S106 corresponds to... Figures 4A to 4B The wireless device shown performs step S204.

[0076] The second subset of beams may include multiple strong beams, such as the beam that shows the highest channel quality parameter (e.g., the highest reference signal received power (RSRP)) based on a measurement performed by the wireless device on a reference signal (e.g., CSI-RS) transmitted by the wireless device on the beam set.

[0077] Wireless devices can measure CSI-RS to determine the strongest beams to report. The wireless device can report the number of strong beams based on, for example, an indication of the number of beams reported from the channel reports received from the network node. When, for example, the network node has indicated to report CSI for 3 beams, the wireless device can report the three strongest beams, such as the beam with the highest channel quality parameters. In this case, a second subset of the beams includes the three beams. The wireless device can be configured to use one or more strong beams for transmissions to the network node, such as data transmission.

[0078] In one or more example embodiments, a network node may indicate multiple beams in a beam set such as all DL CSI-RS beams, such as CSI-RS beams that allow wireless devices to report L∈{2,3,4} beams used for data transmission. In some embodiments, the number of beams may correspond to a second subset of the beams reported in the channel state report of S106.

[0079] In one or more example methods, the first and second subsets of the beam may have overlapping elements, allowing one or more beams to be included in the first and second subsets. The first and second subsets of the beam are specific to each wireless device. In one or more example methods, the first and second subsets of the beam can dynamically evolve as needed to accommodate changes in the channel. In other words, the first and second subsets of the beam can be dynamically reconfigured, for example, based on channel state information, such as channel quality parameters of the beam. The channel state information can be transmitted between one or more wireless devices and network nodes.

[0080] In one or more example methods, the first subset is a subset of the second subset of beams. When a network node configures the number of beams for which the wireless device should report CSI, the network node can indicate whether beam suppression (e.g., zero-forcing) is applied to one or more reported beams, such as the second subset of beams. In other words, a subset of reported beams (corresponding here to the first subset as a subset of the second subset) can therefore be indicated in S108 as capable of being suppressed by the wireless device. In other words, for reported beams indicated as capable of being suppressed by the first subset, the wireless device may not need, request, and / or expect to send channel state reports. In other words, the wireless device may only report channel state reports for the remaining strong beams (such as beams in the second subset but not in the first subset).

[0081] This can lead to a reduction in the number of channel state reports received from wireless devices.

[0082] This can be indicated in control signaling, for example, through a single bit in the control signaling. In other words, the first subset of suppressable beams can be determined by the network node based on a second subset of beams, such as the strong beams initially reported by the wireless device (as in the second subset in S106). For example, if one or more beams of the second subset of beams initially reported as strong beams by the wireless device are used by the network node to communicate with another wireless device, the network node can select these one or more beams as part of the first subset and request the wireless device to suppress at least one beam of the first subset. The wireless device does not report any channel state estimate of the suppressed beams of the first subset in the next channel state report. Therefore, the wireless device can avoid measuring and reporting the suppressed beams of the first subset in subsequent channel state reports.

[0083] In one or more example methods, the wireless device may determine to apply beam suppression (e.g., zero-forcing) to one or more beams of a first subset. When the wireless device wants to apply beam suppression to one or more beams of the first subset, the network node can receive from the wireless device an indication of the beams the wireless device wants to suppress (e.g., leave empty). The indication received from the wireless device may include, for example, one or more beam identifiers, such as one or more beam indices, identifying the beams of the first subset.

[0084] A network node can receive channel state reports from one or more wireless devices. For example, a channel state report allows a network node to obtain an overview of the channel state on its CSI-RS beam. Based on the channel state report, the network node can determine whether to apply beam suppression on one or more beams reported by one or more wireless devices to improve the channel state on one or more beams, such as the channel state on one or more CSI-RS beams. For example, it can be assumed that a first wireless device and a second wireless device indicate the same beam as one of the strong beams in their respective channel state reports, or that the first wireless device instructs the network node to transmit a beam on it for the second device's CSI-RS. In one or more example methods, the network node can therefore indicate to a wireless device, such as the first wireless device, that the beam will be suppressed by the wireless device for channel state estimation.

[0085] It is conceivable that, in one or more example methods, a network node can assist a wireless device in determining whether it should apply beam suppression, such as zero-forcing, by providing it with indications of resources or resource sets for transmitting CSI-RS (e.g., non-zero power (NZP) CSI-RS, CSI-IM, and / or zero power (ZP) CSI-RS) symbols for interference management. It can be noted that these resources for interference management differ from the resources for beam suppression management mentioned in S110 above. Specifically, the purpose of interference management resources may be to allow the wireless device to estimate the amount of multi-user interference in order to estimate the cost of applying beam suppression. When beam suppression is applied, there may be a penalty; however, when interference is high, it may be worthwhile to impose the penalty to reduce the interference. It can be noted that the resources for interference management are not allocated simultaneously with the data and / or other pilot signals (e.g., conventional DMRS / TRS pilot signals) of the wireless device (e.g., the first wireless device) used to make the decision. Resources used for interference management can be instead allocated simultaneously with data and / or other pilot signals (such as conventional DMRS / TRS pilot signals) intended for other wireless devices, such as one or more second wireless devices, enabling the first wireless device to estimate the amount of multi-user interference from one or more second wireless devices.

[0086] In one or more example methods, method 100 includes receiving control signaling from the wireless device in step S102, indicating the beam suppression capability of the wireless device. The beam suppression capability of the wireless device may depend on the hardware configuration of the wireless device, such as its transceiver configuration, for example, its receiver chain configuration, such as the number of receivers and / or transmitters. The wireless device may not have the same number of receivers and transmitters available for both UL and downlink transmissions. Therefore, the beam suppression capability of the wireless device may be dedicated to either UL or DL. Thus, the wireless device can indicate its beam suppression capability for UL and / or DL ​​to network nodes.

[0087] This step S102 corresponds to the following... Figures 4A to 4B The wireless device shown performs step S202.

[0088] In one or more example methods, beam suppression capability includes an indication of the number of beams in a second subset of beams that the wireless device can suppress. The wireless device may indicate to the network node that it can suppress one or more beams in the second subset, for example, leaving N beams in the second subset unsuppressed by the first subset. There may be remaining strong beams used for channel estimation to perform channel state reporting. These remaining strong beams can be considered as unsuppressed strong beams reported by the wireless device.

[0089] For example, a wireless device may indicate to a network node (possibly as part of its beam suppression capability) the number of antennas and / or streams it supports for UL and DL, respectively, for example, in control signaling. The network node can know the number of streams used to communicate with the wireless device; these can also be referred to here as active streams. Each stream can be associated with a beam. Based on this information, the network node can determine the number of beams the wireless device can suppress by subtracting the number of streams used for transmission from the number of streams supported by the wireless device. Therefore, the wireless device can implicitly indicate its beam suppression capability to the network node. It is understood that while there may be a requirement for a minimum number of beams / transceivers that the wireless device will always use, the network node cannot assume any number of additional transceivers the wireless device is willing to use for a particular purpose unless the wireless device explicitly communicates. In one or more example methods, the network node may determine which beams in a first subset of beams the wireless device will apply beam suppression to based on the beam suppression capability received from the wireless device.

[0090] In one or more example methods, method 100 includes determining, in S107, a first subset of beams, such as beams to be suppressed, based on the quality parameters of the beams indicated in the channel state report. The network node may determine which beams in a second subset of beams (e.g., the reported strong beams) to be suppressed based on the quality parameters of the strong beams reported in the channel state report and / or based on the suppression capability of the wireless device. The network node may, for example, receive a channel state report indicating four strong beams, such as beams with quality parameters, such as the power {X1dBm, X2dBm, X3dBm, X4dBm} measured on beams identified as beams 1, 2, 3, and 4. The network node may also receive the beam suppression capability of the wireless device for two beams. In this case, the network node may determine that beams 3 and 4, with the lowest quality parameters, will be suppressed by the wireless device. If the beam suppression capability indicates a beam, the network node may determine that beam 4 will be suppressed because it has the lowest quality parameters. The beams to be suppressed may be indicated to the wireless device via control signaling.

[0091] In one or more example methods, transmission S108 includes transmitting to the wireless device an indication of S108B of at least one beam index of a first subset of beams to be suppressed by the wireless device. This indication may be sent in control signaling. The indication may be implicit or explicit. For example, at least one beam index may be indicated by control signaling indicating a group of beams, such as a set of beam indices including one or more beam indices indicating one or more suppressable beams. The network node may also configure the wireless device to suppress all beams in that set of beam indices, except for beams included in the group reported as strong beams by the wireless device. The indication of the beam index of the suppressed beams can therefore be implicit or indirect.

[0092] In one or more exemplary methods, a network node may determine one or more specific beams to be suppressed, for example, based on strong beams in a channel state report and the beam suppression capability of the wireless device. Therefore, the network node may indicate to the wireless device the corresponding beam index of the one or more specific beams to be suppressed.

[0093] In one or more exemplary methods, the beam index of at least one beam to be suppressed can be indicated by a network node by configuring a wireless device with resources (e.g., DMRS) associated with the beam suppression management (e.g., interference management, IM, DMRS) for beam suppression management. The network node can transmit the configuration of resources for transmitting DMRS on each beam to be suppressed. Based on the indication of the resources for DMRS, the wireless device can determine that the corresponding beam will be suppressed. This allows the network node to dynamically move the beams to be suppressed without having to explicitly notify the wireless device of the beams to be suppressed.

[0094] This step S108B corresponds to the following regarding Figures 4A to 4B Step S206C, performed by the wireless device.

[0095] In one or more example methods, method 100 includes sending control signaling to a wireless device, S110, indicating resources (e.g., DMRS symbols) for pilot signals used for beam suppression management of a first subset of beams. The network node may send pilot signals for beam suppression, such as DMRS symbols on the first set of beams, for example, DMRS symbols on the beams to be suppressed. The pilot signals for beam suppression management allow the wireless device to monitor the first subset of beams, for example, to determine changing channel conditions on the first subset of beams, in order to update and / or re-determine which beams to suppress for continuous efficiency.

[0096] In one or more example methods, such as when a network node has indicated a set of beam indices to be suppressed, DMRS symbols can be transmitted across all beams in a group belonging to the CSI of one or more beams reported by the wireless device. DMRS symbols can be included in the data portion transmitted over the beam. This allows the wireless device to track (e.g., monitor) beams it has not reported. Without pilot signals, the wireless device may not be able to maintain its beam suppression of the first beam set, for example, maintaining optimal suppression filters used to reduce inter-user interference on the first beam set.

[0097] It is understood that the beam suppression disclosed herein can be changed dynamically. It is understood that in one or more example methods, the beam grouping can be changed dynamically. In other words, the grouping does not have to be one-time information sent at the initial connection point. For example, if a network node determines that it is not actually using beams 5-10 in, for example, group {1-10} in data transmission to any wireless device, it can change the beam grouping. Therefore, requiring the wireless device to suppress these beams in channel state reports such as CSI reports can be at a loss, such as wasting energy. The network node can therefore update group {1-10} to {1-4}, such that only beams 1, 2, 3, and 4 remain in the group.

[0098] In one or more exemplary methods, for example when a network node uses the same time-frequency resources to schedule transmissions to other wireless devices (e.g., one or more second wireless devices) within a set of suppressible strong beams reported by a first wireless device, the network node may indicate to the wireless devices resources in a set containing pilot signals for beam suppression management (e.g., for reducing multi-user interference). The pilot signals may be DMRS specifically designed for beam suppression management, also referred to herein as Interference Management (IM) DRMS. Because data and / or other pilot signals can obscure measurements on the IMDRMS, the IMDMRS is not transmitted simultaneously with data and / or other pilot signals (such as conventional DMRS / TRS pilot signals) intended for use by the wireless device or other wireless devices.

[0099] In one or more example methods, the pilot signals for beam suppression management are precoded according to one or more precoding filters for one or more other wireless devices, or are not precoded. The pilot signals for beam suppression management (such as DMRS for data and suppression) may be precoded on beams such as a first beam set (defined by CSI-RS). In one or more example methods, the pilot signals for beam suppression management may be integrated with pilot signals for data transmission (e.g., conventional DMRS / TRS pilot signals).

[0100] Figures 4A to 4B A flowchart is shown of an example method 200 for beam suppression at a wireless device, performed by a wireless device according to this disclosure. The wireless device is configured to communicate with the network node. The wireless device is the wireless device disclosed herein, for example... Figure 1 and Figure 6 The wireless device 300. Method 200 can be performed for beam suppression, such as for mitigating beam interference.

[0101] Method 200 includes receiving, in step S203, a reference signal from a network node for channel estimation of a beam set, such as a set of spatial filters. The reference signal may be a channel state information reference signal (CSI-RS). It is understood that the wireless device may initially not apply beam suppression.

[0102] Method 200 includes transmitting S206 control signaling between a network node and a wireless device, the control signaling indicating beam suppression, such as a spatial filter, of at least one beam of a first subset of beams that can be suppressed by the wireless device. The suppressable beams can be considered as beams that are permitted, allowed, or preferably suppressed. In some embodiments, the suppressable beams may include beams that will be suppressed by the wireless device. It is understood that suppressed beams will not be reported, as only strong beams are reported. The wireless device cannot use suppressed beams for channel state reporting. The first subset of suppressable beams may include one or more beams that can be suppressed by the wireless device. For example, the control signaling indicating beam suppression may indicate whether the wireless device wants to (e.g., should and / or allows) apply beam suppression, such as whether the wireless device wants to activate beam suppression. It is understood that beam suppression can be activated or deactivated, such as ON or OFF.

[0103] Whether a wireless device should apply beam suppression can be sent dynamically, for example by continuously monitoring channel state information and updating the indication based on channel conditions changing on one or more beams.

[0104] This step S206 corresponds to step S108 performed by the network node, as per [reference to...]. Figures 3A to 3B As shown.

[0105] Advantageously, the beam suppression transmitted in S206 allows the wireless device to apply beam suppression to at least one beam of the first subset, which results in a reduction in the number of channel state reports subsequently transmitted by the wireless device.

[0106] In one or more example methods, method 200 includes sending a channel state report S204 indicating a second subset of a beam set to a network node. The second subset of beams may include multiple strong beams, such as the beam indicating the highest channel quality parameter (e.g., highest reference signal received power (RSRP)), which is based on a measurement performed by the wireless device on a reference signal (e.g., CSI-RS) transmitted by the wireless device on the beam set. It is understood that initially, the wireless device does not apply beam suppression and measures the CSI-RS on the beam set, for example, on all beams included in the beam set. In S204, the wireless device may measure the CSI-RS to determine the strong beams to be reported, and the strong beams form part of the second subset. The wireless device may report the number of strong beams based on, for example, an indication of the number of beams received from the network node's channel report. The channel state report S204 indicating the second subset is sent before beam suppression is applied and can be used by the network node to determine the wireless device's beam suppression. This step S204 corresponds to... Figures 3A to 3B The network node shown performs step S106.

[0107] In one or more example methods, the wireless device may determine that beam suppression (e.g., zero-forcing) is to be applied to at least one beam in a first subset. In some embodiments, when the wireless device wants to apply beam suppression to one or more beams in the first subset, the wireless device may send an indication to the network node of the beams it wants to suppress (e.g., leave vacant). The indication sent to the network node may be, for example, one or more beam identifiers, such as one or more beam indices, that identify at least one beam in the first subset to be suppressed.

[0108] In one or more example methods, the first subset is a subset of the second subset of beams. The subset of reported beams in the second subset can be indicated as the first subset that can be suppressed by the wireless device via S206. In other words, for beams in the second subset indicated as suppressable in the first subset, it may not be necessary to send a channel state report. This can be indicated in control signaling, for example, through a single bit in the control signaling. For example, if one or more beams in the second subset of beams initially reported by the wireless device as strong beams in the second subset are used by a network node to communicate with another wireless device, the network node can select these one or more beams as part of the first subset and request the wireless device to suppress at least one beam in the first subset. The wireless device does not report any channel state estimation for the suppressed beams of the first subset in the next channel state report. Therefore, the wireless device can avoid measuring and reporting the suppressed beams of the first subset in subsequent channel state reports.

[0109] In one or more example methods, transmitting S206 includes: receiving from a network node an instruction S206A: the wireless device will apply beam suppression to at least one beam in a first subset. This step S206A corresponds to... Figures 3A to 3B Step S108A, which is performed by the network node.

[0110] When control signaling indicates that beam suppression should be applied, the wireless device can receive control signaling that indicates one or more beam indices (e.g., a set of beam indices) corresponding to one or more beams that will be suppressed by the wireless device.

[0111] In one or more example methods, control signaling may implicitly indicate which beams will be suppressed by the wireless device. In one or more methods, control signaling may instruct the wireless device to suppress as much as possible, such as suppressing as many beams as possible.

[0112] In one or more exemplary methods disclosed herein, a beam group may include P beams that can be indexed by the numbers 1-P. In other words, a network node may be configured to transmit CSI-RS on a set of beams, such as P beams. In one or more examples, the beam group may include 32 beams, such as CSI-RS beams, which can be indexed by the numbers 1-32. In other words, in the given example, her P is 32.

[0113] In one or more example methods, transmission S206 includes receiving control signaling S206D from a network node indicating a group or more beams that can be suppressed by the wireless device, wherein beams in a group of beams can be suppressed by the wireless device when the wireless device does not report a beam in the channel state report. A beam not reported by the wireless device can here be considered as a beam not reported by the wireless device in the channel state report. The control signaling indicating one or more beam groups that can be suppressed by the wireless device can be considered as an indirect indication of suppressing unreported beams. In other words, in some embodiments, the first subset of beams in S206 can be indicated as a group or more beams. For example, control signaling received by a wireless device may indicate that beam groups with indices {{1-10}, {12-15}} are suppressable (e.g., group 1: {1-10}, group 2:). In one or more example methods, a first subset of beams may include beam groups containing the following beam indices {{1-10}, {12-15}}. The control signaling may indicate that when the wireless device reports a CSI for any beam with an index in group {1-10} or group {12-15}, beams in group {1-10} or group {12-15} and only those with unreported indices in the group will be suppressed by the wireless device, for example, in a subsequent channel state report sent from the wireless device. When the wireless device reports a CSI for, for example, beam 17 out of 32 beams (e.g., with index 17), no suppression is required because beam index 17 does not indicate an index included in any beam group indicated as suppressable in the control signaling.

[0114] For example, a wireless device may report the CSI of four beams in a beam group, such as L=4. The wireless device may measure the CSI-RS of that beam group and may determine that the beams with corresponding indices 1, 2, 12, and 16 are the four beams with the highest channel quality (e.g., highest signal strength). For example, in a channel state report for beams 1-2 included in the exemplary beam group {1-10}, the wireless device therefore suppresses the remaining beams in that group, such as beams with indices in the range of 3 to 10. For example, in a channel state report for a beam with index 12 included in the exemplary beam group {12-15}, the wireless device therefore suppresses the remaining beams in that group, such as beams 13-15. For example, in a channel state report for a beam with index 16, the wireless device does not suppress any beam because a beam with index 16 does not have an index included in any beam group that can be suppressed.

[0115] In some exemplary methods, the wireless device may receive in control signaling S206 an indication of the complete set of beam indices {1-32} as a single suppressable beam group. For example, in this example, control signaling S206 may indicate to the wireless device that the wireless device can suppress beams of the entire beam set except for beams that are reported as strong beams by the wireless device (e.g., in S204).

[0116] In one or more example methods, the wireless device may receive an indication in control signaling S206A of using beam groups with one or more indices, such as beam groups with indices {1-10}. Beam suppression and / or beam grouping can be changed dynamically. For example, if a network node determines that it is not actually using, for example, beams 5-10 in group {1-10} in data transmission to any wireless device, it can change the beam grouping. Thus, requiring the wireless device to suppress these beams in channel state reports such as CSI reports may be at a loss, such as wasting energy. The wireless device can therefore receive an updated group that only includes {1-4}, such that only beams 1, 2, 3, and 4 remain in the group.

[0117] In one or more example methods, transmission S206 includes receiving from the network node an indication of S206C of at least one beam index of a first subset of beams to be suppressed by the wireless device. This indication may be sent in control signaling. The indication may implicitly or explicitly indicate the beam index of at least one beam in the first subset of beams to be suppressed. Step S206C corresponds to... Figures 3A to 3B Step S108B, performed by the network node.

[0118] In one or more example methods, the at least one beam index may include multiple beam indices, such as a set of beam indices, indicating multiple suppressable beams. The wireless device may be configured by a network node, for example via control signaling, to suppress all beams in that set of beam indices, except for beams included in the group reported as strong beams by the wireless device. Therefore, the indication of the beam index of the beam to be suppressed can be implicit or indirect, depending on the strong beams identified by the wireless device.

[0119] In one or more example methods, the network node may have already determined, for example, one or more specific beams to be suppressed, based on strong beams reported in the channel state report and the beam suppression capability of the wireless device. Therefore, the network node may indicate to the wireless device the corresponding beam index of one or more specific beams to be suppressed.

[0120] In one or more example methods, the beam index of at least one beam to be suppressed can be indicated by configuring the wireless device with resources (e.g., DMRS) associated with the beam suppression management (e.g., interference management, IM, DMRS) for beam suppression management. The wireless device can receive an indication of the resources used for transmitting DMRS on each beam to be suppressed. Based on the indication of the resources used for DMRS, the wireless device can determine that the corresponding beam will be suppressed. This allows network nodes to dynamically move the beams to be suppressed without having to explicitly notify the wireless device of the beams to be suppressed.

[0121] In one or more example methods, method 200 includes applying beam suppression (S208) to subsequent channel state reports based on control signaling. Applying beam suppression can be viewed here as suppressing channel estimates on the suppressed beam, for example, by applying zero-forcing. This can be seen as excluding suppressed beams, such as at least one from the first subset of beams, from subsequent channel state reports transmitted by the wireless device. Based on the received control signaling, the wireless device can suppress (e.g., attenuate) interference from unwanted beams (e.g., beams not used for data transmission between network nodes and the wireless device) to an acceptable level. This reduces the number of beams reported by the wireless device (e.g., CSI-RS beams), which reduces channel state feedback from the wireless device.

[0122] In one or more example methods, applying S208 may include sending a channel state report S208A to a network node, the channel state report indicating channel state estimates for one or more remaining beams (excluding beams suppressed based on a first subset of beams). In other words, for example, transmitting S208A to a network node, the channel state report (e.g., a subsequent channel state report) includes transmitting a subsequent channel state report to the network node indicating a channel state estimate for a third subset of beams, wherein the third subset excludes beams suppressed based on the first subset of beams. It can be understood that the resulting channel state report is reduced compared to, for example, the channel state report prior to beam suppression indicated in S206.

[0123] In one or more example methods, method 200 includes receiving from a network node an indication of the number of beams in a beam set for channel state reporting from a wireless device in step S201. The wireless device may receive, for example, in control signaling, the number of beams the wireless device wants to report CSI on, or any other number of beams, such as spatial filters, such as downlink spatial filters. In other words, the network node may indicate to the wireless device whether the wireless device wants to report CSI on 2, 3, or 4 beams in the beam set. This step S201 corresponds to... Figures 3A to 3B The step S101 shown is performed by the network node.

[0124] In one or more example embodiments, the wireless device may receive an indication of a second subset of the beams, such as allowing the wireless device to receive CSI-RS beams from which it reports L∈{2,3,4} beams for data transmission, and a first subset of beams that can be suppressed by the wireless device. The first and second beam subsets are subsets of the beam set, such as subsets of all DL CSI-RS beams.

[0125] In one or more example methods, the network node may indicate different numbers of beams for UL and DL based on the capabilities of the wireless device. For example, the wireless device may support 4 DL streams (e.g., with 4 antennas and 4 receive chains), but only support 1 or 2 UL streams (4 antennas that may be fed by only 1 or 2 transmit chains).

[0126] In one or more example methods, method 200 includes sending control signaling S202 to a network node indicating the beam suppression capability of a wireless device. The beam suppression capability of the wireless device may depend on the hardware configuration of the wireless device, such as the number of receivers and transmitters. The wireless device may not have the same number of receivers and transmitters available for both UL and downlink transmissions. Therefore, the beam suppression capability of the wireless device may be dedicated to either UL or DL. Thus, the wireless device can indicate its beam suppression capability for UL and / or DL ​​to the network node.

[0127] In one or more example methods, beam suppression capability includes an indication of the number of beams in a second subset of beams that the wireless device is capable of suppressing. The wireless device may indicate to the network node that it is capable of suppressing one or more beams in the second subset, for example, leaving N unused beams in the second subset unused beams.

[0128] For example, a wireless device may indicate to a network node, for instance, in control signaling the number of antennas and / or streams it supports for UL and DL, respectively. Therefore, the wireless device may implicitly indicate its beam suppression capability to the network node. It is understood that while there may be requirements for a minimum number of beams and / or transceivers that the wireless device will always use, the network node cannot assume any number of additional transceivers the wireless device is willing to use for a particular purpose unless the wireless device explicitly communicates. In one or more example methods, the network node may determine which beams in a first subset of beams the wireless device will apply beam suppression to based on the beam suppression capability received from the wireless device.

[0129] This step S202 corresponds to the following... Figures 3A to 3B The network node shown performs step S102.

[0130] In one or more example methods, method 200 includes receiving S210 control signaling from a network node, the control signaling indicating resources for pilot signals used for beam suppression management of a first beam subset. The wireless device may receive pilot signals for beam suppression, such as DMRS symbols for the first beam set, or DMRS symbols for beams to be suppressed. The pilot signals for beam suppression management allow the wireless device to monitor the first beam subset, for example, to determine changing channel conditions on the first beam subset, in order to update and / or re-determine which beams to suppress for continuous efficiency.

[0131] In one or more example methods, for instance, when the wireless device has received an indication of a set of beam indices to be suppressed, DMRS symbols can be transmitted across all beams in a group belonging to the CSI of one or more beams reported by the wireless device. DMRS symbols can be included in the data portion transmitted over the beam. This allows the wireless device to track (e.g., monitor) beams it has not reported. Without pilot signals, the wireless device may not be able to maintain its beam suppression of the first beam set, for example, maintaining optimal suppression filters used to reduce inter-user interference on the first beam set.

[0132] In one or more exemplary methods, for example when a network node is scheduled to transmit to other wireless devices (e.g., one or more second wireless devices) using the same time-frequency resources within a set of suppressible strong beams reported by a first wireless device, the network node may indicate to the wireless device resources in a set containing pilot signals for beam suppression management (e.g., for reducing multi-user interference). The pilot signals may be DMRS specifically designed for beam suppression management, also referred to herein as Interference Management (IM) DRMS. Because data and / or other pilot signals may obscure measurements on the IMDRMS, the IMDMRS is not transmitted simultaneously with data and / or other pilot signals (such as conventional DMRS / TRS pilot signals) intended for use by the wireless device or other wireless devices.

[0133] In one or more example methods, the pilot signals are precoded according to one or more precoding filters for one or more other wireless devices, or they are not precoded. Pilot signals used for beam suppression management (such as DMRS for data and suppression) may be precoded on beams such as the first beam set (defined by CSI-RS).

[0134] In one or more example methods, transmission S206 includes receiving from the network node an indication that the network node does not support beam suppression at the wireless device (e.g., the network node does not activate or deactivate beam suppression at the wireless device). This indication may, for example, indicate that the network is not transmitting pilot signals for suppression management, such as DMRS symbols. Therefore, the network node may not be able to assist the wireless device in monitoring any suppressed beams to update its current knowledge of beam suppression (e.g., empty space). This can lead to increased multi-user interference between DL CSI-RS beaming events, thereby degrading the channel quality experienced by the wireless device. The indication may indicate that beam suppression is unavailable for the wireless device, e.g., inactive. Therefore, the wireless device can avoid applying beam suppression based on this indication. This step S206B corresponds to step S108C performed by the network node.

[0135] In one or more example methods, beam suppression can be applied by default to indicate that the network node does not support it.

[0136] A beam suppression assisted (e.g., beam suppression is OFF, meaning it is not required or not requested) indication is not signaled for the beam. Therefore, based on the network node's indication that it is not assisting in beam suppression, the wireless device can stop suppressing such beams. In other words, the wireless device can stop applying beam suppression based on this indication.

[0137] This step S206B corresponds to, as per [the relevant information] Figures 3A to 3BStep S108C, which is performed by the network node.

[0138] Figure 5 A block diagram of an example network node 400 according to this disclosure is shown. Network node 400 includes memory circuitry 401, processor circuitry 402, and wireless interface 403. Network node 400 can be configured to perform... Figures 3A to 3B Any method disclosed herein. In other words, network node 400 can be configured to perform beam suppression at the wireless device.

[0139] Network node 400 is configured to communicate with wireless devices (such as those disclosed herein) using a wireless communication system.

[0140] The wireless interface 403 is configured to communicate wirelessly via a wireless communication system (e.g., a 3GPP system, such as a 3GPP system supporting one or more of the following: New Radio, NR, Narrowband IoT, NB-IoT, and LTE-M).

[0141] Network node 400 is configured to, for example, transmit a reference signal for channel estimation of beam set to a wireless device via wireless interface 403.

[0142] Network node 400 is configured to communicate control signaling between the network node and the wireless device, for example via wireless interface 403, the control signaling indicating beam suppression of at least one beam in a first subset of beams that can be suppressed by the wireless device.

[0143] Processor circuit 402 is optionally configured to execute Figures 3A to 3B Any operation disclosed in the above (e.g., any one or more of S101, S102, S106, S107, S108A, S108B, S108C, S108D, S109, S110). The operation of network node 400 may be implemented in the form of executable logic routines (e.g., lines of code, software programs, etc.) stored on a non-transient computer-readable medium (e.g., memory circuitry 401) and executed by processor circuitry 402.

[0144] Furthermore, the operation of network node 400 can be considered as a method configured to be performed by network node 400. Additionally, while the described functions and operations can be implemented in software, such functions can also be implemented via dedicated hardware or firmware, or some combination of hardware, firmware, and / or software.

[0145] The memory circuit 401 may be one or more of a buffer, flash memory, hard disk drive, removable media, volatile memory, non-volatile memory, random access memory (RAM), or other suitable devices. In a typical configuration, the memory circuit 401 may include non-volatile memory for long-term data storage and volatile memory used as system memory for the processor circuit 402. The memory circuit 401 may exchange data with the processor circuit 402 via a data bus. Control lines and an address bus may also exist between the memory circuit 401 and the processor circuit 402. Figure 5 (Not shown in the image). Memory circuit 401 is considered a non-transient computer-readable medium.

[0146] The memory circuit 401 can be configured to store beam information, such as beam index or beam group, and / or channel state information in a portion of the memory.

[0147] Figure 6 A block diagram of an example wireless device 300 according to this disclosure is shown. Wireless device 300 includes memory circuitry 301, processor circuitry 302, and wireless interface 303. Wireless device 300 can be configured to perform... Figures 4A to 4B Any of the methods disclosed herein. In other words, the wireless device 300 can be configured to perform beam suppression at the wireless device.

[0148] The wireless device 300 is configured to communicate with network nodes (such as those disclosed herein) using a wireless communication system.

[0149] The wireless device 300 is configured to receive (e.g., via wireless interface 303) a reference signal for channel estimation of beam sets from a network node.

[0150] The wireless device 300 is configured to communicate between a network node and the wireless device (e.g., via wireless interface 303) a control signaling indicating beam suppression of at least one beam in a first subset of beams that can be suppressed by the wireless device.

[0151] The wireless interface 303 is configured to communicate wirelessly via a wireless communication system such as a 3GPP system, which supports one or more of the following 3GPP systems: New Radio, NR, Narrowband IoT, NB-IoT, and LTE-M (Long Term Evolution - Enhanced Machine Type Communications).

[0152] Wireless device 300 can be optionally configured to perform Figures 4A to 4BAny operation disclosed in the above (e.g., any one or more of S201, S202, S204, S206A, S206B, S206C, S206D, S208, S208A, S210). The operation of the wireless device 300 may be implemented in the form of an executable logic routine (e.g., a line of code, a software program, etc.) and executed by the processor circuitry 302.

[0153] Furthermore, the operation of the wireless device 300 can be considered as a method configured to be performed by the wireless device 300. Additionally, while the described functions and operations can be implemented in software, such functions can also be implemented via dedicated hardware or firmware, or some combination of hardware, firmware, and / or software.

[0154] The memory circuit 301 may be one or more of a buffer, flash memory, hard disk drive, removable media, volatile memory, non-volatile memory, random access memory (RAM), or other suitable devices. In a typical configuration, the memory circuit 301 may include non-volatile memory for long-term data storage and volatile memory used as system memory for the processor circuit 302. The memory circuit 301 may exchange data with the processor circuit 302 via a data bus. Control lines and an address bus may also exist between the memory circuit 301 and the processor circuit 302. Figure 6 (Not shown in the image). Memory circuit 301 is considered a non-transient computer-readable medium.

[0155] The memory circuit 301 can be configured to store information such as beam index or beam group, beam information and / or channel state information in a portion of the memory.

[0156] Figure 7 This is a signaling diagram 700 illustrating an exemplary message exchange between an exemplary network node 400 and an exemplary wireless device 300 for beam suppression at a wireless device.

[0157] Network node 400 can send an indication 702 to wireless device 300 of multiple beams in the beam set from which the channel state report from the wireless device will be transmitted. This indication specifies how many beams (e.g., CSI-RS beams) the wireless device will transmit the channel state report on. This corresponds to the network node's... Figure 3A S101 and wireless devices Figure 4A S201.

[0158] Wireless device 300 can send control signaling 704 to network node 400, indicating the beam suppression capability of the wireless device. This corresponds to the network node's... Figure 3A S102 and wireless devices Figure 4AS202.

[0159] Network node 400 sends a reference signal 706, such as CSI-RS, for channel estimation of the beam set to wireless device 300. Based on the reference signal, the wireless device determines a second beam set, such as a strong beam set, for communication with network node 400. It is understood that at this stage, wireless device 300 does not apply the beam suppression disclosed herein and measures the CSI-RS on the beam set, for example, on all beams included in the beam set. This corresponds to the network node's... Figure 3A S104 and wireless devices Figure 4A S203.

[0160] Wireless device 300 can send a channel state report 708 to network node 400 indicating a second subset of the beam set. The second subset may include multiple strong beams, such as the beam indicating the highest channel quality parameters, based on measurements performed by the wireless device on the transmitted reference signal 706. This corresponds to the network node's... Figure 3A S106 and wireless devices Figure 4A S204.

[0161] Network node 400 can determine 709 a first subset of beams based on beam quality parameters, such as those of a second subset of beams, indicated in a channel state report 708 received from a wireless device. The first subset of beams consists of beams that can be suppressed by the wireless device 300. This corresponds to the network node's... Figure 3A S107.

[0162] Network node 400 and wireless device 300 transmit control signaling 710 indicating beam suppression of at least one beam in a first subset of beams that can be suppressed by wireless device 300. This corresponds to the network node's... Figure 3B S108 and wireless devices Figure 4A S206.

[0163] Wireless device 300 applies beam suppression based on a first subset of beams and sends a channel state report 712 to network node 400 indicating (excluding beams suppressed based on the first subset of beams) one or more of the remaining beams. This corresponds to the network node's... Figure 3B S109 and wireless devices Figure 4B The S208B. Compared to the Channel State Report 708, the Channel State Report 712 has a reduced number of reports, thus enhancing the channel state reporting.

[0164] Network node 400 sends control signaling 714 to wireless device 300, which instructs on the resources of pilot signals for beam suppression management of the first beam subset. This corresponds to the network node's... Figure 3BS110 and wireless devices Figure 4B The S210.

[0165] Examples of methods and products (network nodes and wireless devices) based on this disclosure are illustrated in the following items:

[0166] Project 1. A method for beam suppression at a wireless device, performed by a network node, wherein the wireless device is configured to communicate with the network node, the method comprising:

[0167] Sending (S104) a reference signal for channel estimation of beam set to the wireless device; and

[0168] (S108) Control signaling is transmitted between the network node and the wireless device, the control signaling indicating beam suppression of at least one beam in a first subset of beams that can be suppressed by the wireless device.

[0169] Item 2. The method according to Item 1, wherein the transmission (S108) includes:

[0170] Send (S108A) an instruction to the wireless device that the wireless device will apply beam suppression to at least one beam in the first subset.

[0171] Item 3. The method according to Item 1, wherein the transmission (S108) includes:

[0172] Sending (S108C) an instruction to the wireless device that the network node does not support beam suppression at the wireless device.

[0173] Item 4. The method according to any one of items 1 to 4, wherein the method comprises: receiving (S106) a channel state report indicating a second subset of the beam set from the wireless device.

[0174] Project 5. The method described in Project 4, wherein the first subset is a subset of the second subset of the beam.

[0175] Item 6. The method according to any one of items 1 to 5, wherein the method comprises: sending (S110) a control signaling to the wireless device, the control signaling indicating resources of pilot signals for beam suppression management of the first subset of the beam.

[0176] Item 7. The method according to Item 6, wherein the pilot signal is precoded according to one or more precoding filters for one or more other wireless devices, or is not precoded.

[0177] Item 8. The method according to any one of the preceding items, wherein the transmission (S108) comprises:

[0178] Send (S108B) an indication to the wireless device of at least one beam index of a first subset of beams to be suppressed by the wireless device.

[0179] Item 9. The method according to any one of the preceding items, wherein the method comprises:

[0180] The first subset of the beam is determined based on the quality parameters of the beam indicated in the channel state report (S107).

[0181] Item 10. The method according to any one of the preceding items, wherein the method comprises:

[0182] - Receive (S102) control signaling from the wireless device indicating the beam suppression capability of the wireless device.

[0183] Item 11. The method according to Item 10, wherein the beam suppression capability includes an indication of the number of beams in the second subset of beams that the wireless device is capable of suppressing.

[0184] Item 12. The method according to any one of the preceding items, wherein the method comprises:

[0185] - Send to the wireless device (S101) an indication of the number of beams in the beam set of the wireless device used for channel state reporting.

[0186] Item 13. A method for performing beam suppression at a wireless device, performed by a wireless device, wherein the wireless device is configured to communicate with a network node, the method comprising:

[0187] Receive (S203) from the network node a reference signal for channel estimation of the beam set; and

[0188] (S206) Control signaling is transmitted between the network node and the wireless device, the control signaling indicating beam suppression of at least one beam in a first subset of beams that can be suppressed by the wireless device.

[0189] Item 14. The method according to Item 13, wherein the method comprises:

[0190] Send (S204) a channel state report indicating a second subset of the beam set to the network node.

[0191] Item 16. The method according to Item 14, wherein the first subset is a subset of the second subset of the beam.

[0192] Item 16. The method according to any one of items 13 to 15, wherein the method comprises:

[0193] Beam suppression is applied to subsequent channel state reports based on the control signaling (S208).

[0194] Item 17. The method according to any one of items 13 to 16, wherein the method comprises:

[0195] Send (S202) control signaling to the network node indicating the beam suppression capability of the wireless device.

[0196] Item 18. The method according to Item 17, wherein the beam suppression capability includes an indication of the number of beams in the second subset of beams that the wireless device is capable of suppressing.

[0197] Item 19. The method according to any one of items 13 to 18, wherein the transmission (S206) comprises:

[0198] The wireless device receives (S206A) an instruction from the network node that it will apply beam suppression to at least one beam in the first subset.

[0199] Item 20. The method according to any one of items 13 to 19, wherein the transmission (S206) comprises:

[0200] Receive (S206B) an instruction from the network node that the network node does not assist in beam suppression.

[0201] Item 21. The method according to any one of items 13 to 20, wherein the transmission (S206) comprises:

[0202] (S206C) Receive from the network node an indication of at least one beam index of the first subset of beams to be suppressed by the wireless device.

[0203] Item 22. The method according to any one of Item 13, wherein the method comprises:

[0204] (S210) Control signaling is received from the network node, the control signaling indicating resources for pilot signals used for beam suppression management of the first subset of the beam.

[0205] Item 23. The method according to any one of items 13 to 22, wherein the pilot signal is precoded according to one or more precoding filters for one or more other wireless devices, or is not precoded.

[0206] Item 24. The method according to any one of items 13 to 23, wherein the method comprises:

[0207] (S201) Receive from the network node an indication of the number of beams in the beam set used for channel state reports from the wireless device.

[0208] Item 25. A network node comprising memory circuitry, processor circuitry, and a wireless interface, wherein the network node is configured to perform any one of the methods according to any one of items 1 to 12.

[0209] Item 26. A wireless device comprising memory circuitry, processor circuitry, and a wireless interface, wherein the wireless device is configured to perform any one of the methods according to any one of items 13 to 24.

[0210] The use of the terms "first," "second," "third," and "fourth," "firstly," "secondly," and "again," etc., does not imply any particular order, but is included to identify individual elements. Furthermore, the use of the terms "first," "second," "third," and "fourth," "firstly," "secondly," and "again," etc., does not indicate any order or importance, but is used to distinguish one element from another. Note that the terms "first," "second," "third," and "fourth," "firstly," "secondly," and "again," etc., are used here and elsewhere for labelling purposes only and are not intended to indicate any particular spatial or temporal order. Moreover, the labeling of a first element does not imply the existence of a second element, and vice versa.

[0211] Understandable. Figures 1 to 7 This includes some circuits or operations shown with solid lines and some circuits or operations shown with dashed lines. The circuits or operations included in the solid lines are those included in the widest instance. The circuits or operations included in the dashed lines are examples that can be included in or are part of the circuits or operations shown in the solid lines, or other circuits or operations that can be taken besides those shown in the solid lines. It should be understood that these operations do not need to be performed in the order shown. Furthermore, it should be understood that not all operations need to be performed. The example operations can be performed in any order and in any combination.

[0212] It should be noted that the word "including" does not necessarily exclude the presence of other elements or steps besides those listed.

[0213] It should be noted that the word "one" or "a" before "component" does not preclude the existence of multiple such components.

[0214] It should also be noted that any reference numerals in the drawings do not limit the scope of the claims, examples may be implemented at least in part by hardware and software, and several “apparatus”, “units” or “devices” may be represented by the same hardware item.

[0215] The various example methods, devices, nodes, and systems described herein are described in the general context of method steps or processes that can be implemented in one aspect by a computer program product contained in a computer-readable medium, including computer-executable instructions, such as program code, that are executed by a computer in a networked environment. Computer-readable media may include removable and non-removable storage devices, including but not limited to read-only memory (ROM), random access memory (RAM), compact discs (CDs), digital versatile discs (DVDs), etc. Typically, program flow may include routines, programs, objects, components, data structures, etc., that perform a specified task or implement a particular abstract data type. Computer-executable instructions, associated data structures, and program flow represent examples of program code for performing steps of the methods disclosed herein. A particular sequence of such executable instructions or associated data structures represents examples of corresponding actions for implementing the functionality described in such steps or processes.

[0216] Although features have been shown and described, it should be understood that they are not intended to limit the scope of the claimed disclosure, and it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the scope of the claimed disclosure. Therefore, the specification and drawings are to be considered illustrative rather than restrictive. The claimed disclosure is intended to cover all substitutions, modifications, and equivalents.

Claims

1. A method for beam suppression at a wireless device, performed by a network node, wherein, The wireless device is configured to communicate with the network node, and the method includes: - Send a reference signal to the wireless device for channel estimation of the beam set; - Transmitting control signaling between the network node and the wireless device, the control signaling indicating beam suppression of at least one beam in a first subset of beams that can be suppressed by the wireless device; - Send to the wireless device an indication that the network node does not support the beam suppression assisted at the wireless device; and - Send control signaling to the wireless device instructing the resources of pilot signals for beam suppression management of the first subset of the beam.

2. The method according to claim 1, wherein, The transmission includes: - Send to the wireless device an indication that the wireless device will apply beam suppression to at least one beam in the first subset.

3. The method according to claim 1 or 2, further comprising: Receive a channel state report from the wireless device that indicates a second subset of the beam set.

4. The method according to claim 3, wherein, The first subset is a subset of the second subset of the beam.

5. The method according to claim 1, wherein, The pilot signal may be precoded according to one or more precoding filters for one or more other wireless devices, or it may not be precoded.

6. The method according to claim 1 or 2, wherein, The transmission includes: - Send to the wireless device an indication of at least one beam index of the first subset of beams to be suppressed by the wireless device.

7. The method according to claim 3, further comprising: - The first subset of the beam is determined based on the quality parameters of the beam indicated in the channel state report.

8. The method according to claim 3, further comprising: - Receive control signaling from the wireless device that indicates the beam suppression capability of the wireless device.

9. The method according to claim 8, wherein, The beam suppression capability includes an indication of the number of beams in the second subset of beams that the wireless device is capable of suppressing.

10. The method according to claim 1 or 2, further comprising: - Send to the wireless device an indication of the number of beams in the beam set used for channel state reports from the wireless device.

11. A method performed by a wireless device for beam suppression at the wireless device, wherein, The wireless device is configured to communicate with a network node, and the method includes: - Receive a reference signal from the network node for channel estimation of the beam set; - Transmitting control signaling between the network node and the wireless device, the control signaling indicating beam suppression of at least one beam in a first subset of beams that can be suppressed by the wireless device; - Receive from the network node an indication that the network node does not assist in beam suppression; and - Receive control signaling from the network node, the control signaling indicating resources for pilot signals used for beam suppression management of the first subset of the beam.

12. The method according to claim 11, wherein, The method further includes: - Send a channel state report indicating a second subset of the beam set to the network node.

13. The method according to claim 12, wherein, The first subset is a subset of the second subset of the beam.

14. The method according to any one of claims 11 to 13, wherein, The method further includes: - Beam suppression is applied to subsequent channel state reports based on the control signaling.

15. The method according to claim 12, wherein, The method further includes: - Send control signaling to the network node indicating the beam suppression capability of the wireless device.

16. The method according to claim 15, wherein, The beam suppression capability includes an indication of the number of beams in the second subset of beams that the wireless device is capable of suppressing.

17. The method according to any one of claims 11 to 13, wherein, The transmission includes: - Receive from the network node an indication that the wireless device will apply beam suppression to at least one beam in the first subset.

18. The method according to any one of claims 11 to 13, wherein, The transmission includes: - Receive from the network node an indication of at least one beam index of the first subset of beams to be suppressed by the wireless device.

19. The method according to claim 11, wherein, The pilot signal may be precoded according to one or more precoding filters for one or more other wireless devices, or it may not be precoded.

20. The method according to any one of claims 11 to 13, the method further comprising: - Receive from the network node an indication of the number of beams in the beam set used for channel state reports from the wireless device.

21. A network node, the network node comprising a memory circuit, a processor circuit, and a wireless interface, wherein, The network node is configured to perform any one of the methods according to any one of claims 1 to 10.

22. A wireless device, the wireless device comprising a memory circuit, a processor circuit, and a wireless interface, wherein, The wireless device is configured to perform any one of the methods according to any one of claims 11 to 20.

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