WO2025051575A1

WO2025051575A1 - A method for improving communication between a radio network node and a wireless device, a related wireless device and a related radio network node

Info

Publication number: WO2025051575A1
Application number: PCT/EP2024/073849
Authority: WO
Inventors: Erik Lennart Bengtsson; Fredrik RUSEK
Original assignee: Sony Europe Bv; Sony Group Corp
Current assignee: Sony Europe Bv; Sony Group Corp
Priority date: 2023-09-08
Filing date: 2024-08-26
Publication date: 2025-03-13
Anticipated expiration: 2026-03-08

Abstract

A method performed in a wireless device, WD, is disclosed, for enabling a radio network node to improve communication with the WD. The method comprises transmitting, to the radio network node, a message indicating power properties of the WD's transceiver, wherein the power properties are indicative of the transceiver's contribution to a transmit path loss and the transceiver's contribution to a receive path loss.

Description

A METHOD FOR IMPROVING COMMUNICATION BETWEEN A RADIO NETWORK NODE AND A WIRELESS DEVICE, A RELATED WIRELESS DEVICE AND A RELATED RADIO NETWORK NODE

The present disclosure pertains to the field of wireless communications. The present disclosure relates to a method for enabling a radio network node to improve communication with a wireless device (WD), a related WD, a method for improving communication with a WD and a related radio network node.

BACKGROUND

In wireless telecommunication systems channel sounding is used to evaluate a radio environment for wireless communication, such as for determining channel conditions of channels used for communication between a WD and a radio network node. In the 3^rd Generation Partnership Project (3GPP) new radio (NR), reciprocity based massive multiple input multiple output (MIMO) or sounding reference signal (SRS) based channel state information (CSI) estimation for downlink (DL) may be used and are widely deployed as channel sounding methods.

However, there are some restrictions in the achieved performance of the current methods. As the Uplink (UL) is used to sound the channel, and it is assumed that there is reciprocity with the Downlink (DL) it is important that the transmitted SRSs are predictable. Reciprocity can herein be seen as the channel conditions of the DL correspond to the channel conditions estimated in the UL. For the reciprocity assumption to hold, the transmitted SRSs need to be strong and represent the sensitivity of the receive path in DL. However, in many cases the SRSs transmitted in the transmit path, such as in the UL, do not represent the actual sensitivity of the receive path.

SUMMARY

Accordingly, there is a need for devices and methods for enabling a radio network node to improve communication with a wireless device, which may mitigate, alleviate or address the shortcomings existing and may provide an improved estimation of DL channel conditions related to a WD.

A method is disclosed, performed in a wireless device (WD) for enabling a radio network node to improve communication with the WD. The method comprises transmitting, to the radio network node, a message indicating power properties of the WD’s transceiver. The power properties are indicative of the transceiver’s contribution to a transmit path loss and the transceiver’s contribution to a receive path loss. Further, a wireless device is provided, the wireless device comprising memory circuitry, processor circuitry, and a wireless interface. The wireless device is configured to perform any of the methods according to any of the methods disclosed herein.

It is an advantage of the present disclosure that the WD can enable the sounding of the communication channels, such as radio channels to be carried out with an improved accuracy and robustness. By transmitting the power properties to the radio network node, the WD can enable the radio network node to calibrate the measured value of a reference signal received from the WD, to provide a better estimation of a DL radio channel. Further, the disclosed method may allow for an improved quality and efficiency of UL and DL communication, since the radio network node is enabled to adjust one or more communication parameters, such as a precoder and/or scheduling of the UL and/or DL communication based on the improved accuracy of the sounding of the communication channels, such as of the radio channels. The disclosed method can enable the radio network node to apply one or more different precoders and/or different scheduling to be applied for the UL channel and/or the DL channel, while taking the power properties of the respective WDs into account.

A method is disclosed, performed in a radio network node, for improving communication with a WD. The method comprises receiving, from a WD, a message indicating power properties of the WD’s transceiver. The power properties may be indicative of the transceiver’s contribution to a transmit path loss and the transceiver’s contribution to a receive path loss. The method comprises calibrating, based on the power properties, a measured value of a reference signal received from the WD.

Further, a radio network node is provided, the radio network node comprising memory circuitry, processor circuitry, and a wireless interface, wherein the radio network node is configured to perform any of the methods according to any of the methods disclosed herein.

It is an advantage of the present disclosure that the radio network node can carry out the sounding of the communication channels, such as radio channels, with an improved accuracy and robustness based on the power properties received from the WD. Based on the power properties, the radio network node can calibrate the measured value of a reference signal received from the WD, to provide a better estimation of the DL radio channel. Further, the disclosed method may allow for an improved quality and efficiency of UL and DL communication, since the radio network node can adjust one or more communication parameters, such as a precoder and/or scheduling of the UL and/or DL communication based on the improved accuracy of the sounding of the communication channels, such as radio channels. The disclosed method allows the radio network node to apply one or more different precoders and/or different scheduling to be applied for the UL channel and/or the DL channel, while taking the power properties of the respective WDs into account.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other features and advantages of the present disclosure will become readily apparent to those skilled in the art by the following detailed description of examples thereof with reference to the attached drawings, in which:

Fig. 1 is a diagram illustrating an example wireless communication system comprising an example network node and an example wireless device according to this disclosure,

Fig. 2A-2B are diagrams illustrating example wireless device architectures and example losses associated with the respective architecture,

Fig. 3 is a flow-chart illustrating an example method, performed in a wireless device of a wireless communication system, for enabling a radio network node to improve communication with the WD, according to this disclosure,

Fig. 4 is a flow-chart illustrating an example method, performed in a radio network node of a wireless communication system, for improving communication with a WD, according to this disclosure,

Fig. 5 is a block diagram illustrating an example wireless device according to this disclosure, and

Fig. 6 is a block diagram illustrating an example radio network node according to this disclosure.

DETAILED DESCRIPTION

Various examples and details are described hereinafter, with reference to the figures when relevant. It should be noted that the figures may or may not be drawn to scale and that elements of similar structures or functions are represented by like reference numerals throughout the figures. It should also be noted that the figures are only intended to facilitate the description of the examples. They are not intended as an exhaustive description of the disclosure or as a limitation on the scope of the disclosure. In addition, an illustrated example needs not have all the aspects or advantages shown. An aspect or an advantage described in conjunction with a particular example is not necessarily limited to that example and can be practiced in any other examples even if not so illustrated, or if not so explicitly described. The figures are schematic and simplified for clarity, and they merely show details which aid understanding the disclosure, while other details have been left out. Throughout, the same reference numerals are used for identical or corresponding parts.

Fig. 1 is a diagram illustrating an example wireless communication system 1 comprising an example radio network node 400 and an example wireless device 300 according to this disclosure.

As discussed in detail herein, the present disclosure relates to a wireless communication system 1 comprising a cellular system, for example, a 3GPP wireless communication system. The wireless communication system 1 comprises a wireless device 300 and/or a radio network node 400.

A radio network node disclosed herein refers to a radio access network (RAN) node operating in the radio access network, such as a base station, an evolved Node B, eNB, gNB in NR. In one or more examples, the RAN node is a functional unit which may be distributed in several physical units. In one or more examples, the radio network node is a functional unit which may be distributed in several physical units.

The wireless communication system 1 may in one or more examples, comprise a core network (CN) node. The CN node disclosed herein refers to a network node operating in the core network, such as in the Evolved Packet Core Network, EPC, and/or a 5G Core Network, 5GC. Examples of CN nodes in EPC include a Mobility Management Entity, MME.

The wireless communication system 1 described herein may comprise one or more wireless devices 300, 300A, and/or one or more network nodes 400, such as one or more of: a base station, an eNB, a gNB and/or an access point. A wireless device may refer to a mobile device and/or a user equipment, UE. The wireless device 300, 300A may be configured to communicate with the network node 400 via a wireless link (or radio access link) 10, 10A.

The wireless devices 300, 300A may be configured for Multiple-Input Multiple-Output (MIMO) communication. MIMO is a wireless technology that increases the data capacity of the WD by using multiple transmitting and/or receiving antennas. Each antenna may be connected to one or more transmitters and/or receivers of a transceiver of the WD 300, 300A. Thereby, a plurality of receive radio channels and/or transmit radio channels may be provided for communication between the WD 300, 300A and the radio network node 400 via the wireless link 10. To determine the radio channel conditions of these radio channels, channel sounding may be performed, for example by the WD 300, 300A transmitting a reference signal in UL using one or more transmit radio channels. The transmitted reference signals can then be measured by the radio network node to estimate a radio channel condition for DL communication from the radio network node 400 to the WD 300, 300A. However, depending on the internal losses in the transceiver of the WD 300, 300A, the estimation of the DL radio channel conditions may be more or less accurate.

Figs. 2A and 2B illustrate two example WD architectures, such as WD transceiver 303 configurations, for which the solution according to this disclosure may be applied. Different WD architectures may have different pros and cons. In the example WD architectures of Figs. 2A and 2B, the transceivers 303 comprise one transmitter (T) and two receivers (R), which may herein be referred to as a 1T2R transceiver configuration. The example WD architecture of Fig. 2A, comprises a first switch 3031 , such as a cross switch, such as a swapping switch or a Double Pole Double Throw (DPDT) switch, that switches between the antenna ports 3035A, 3035B used for transmission and/or reception. In the example WD architecture of Fig. 2A, a first receiver 3033A and the transmitter T 3034 are connected to the first switch 3031 via a duplexer 3032, such as a duplex filter. The duplexer 3032 may be a Single Pole Double Throw (SPDT) switch when Time Division Multiplexing (TDD) is used for communication or a filter when Frequency Division Multiplexing (FDD) is used for communication. The second receiver 3033B of the example WD architecture of Fig. 2A may be directly connected to the first switch 3031.

In the example WD architecture of Fig. 2B the first receiver 3033A is connected to a first antenna port 3035A via a first duplexer 3032A. The second receiver 3033B is directly connected to a second antenna port 3035B via a second duplexer 3032B. The first duplexer 3032A and the second duplexer 3032B may correspond to the duplexer 3032 in Fig. 2A, such as may be one or more of a SPDT switch for TDD and a filter for FDD. The transmitter 3034 is connected to the first duplexer 3032A and the second duplexer 3032B via switch 3031 , such as a SPDT, capable of path selection. The switch 3031 may thus switch which duplexer 3032A, 3032B, and thus which antenna port 3035A, 3035B the transmitter 3034 is to use for transmission.

Both example WD architectures shown in Fig. 2a and 2B may be configured to associate a receiver path to each antenna port and a transmitter path to either of the antenna ports (but not simultaneously). The example architectures shown in Fig. 2A and 2B may have at least three possible causes for, such as areas causing, losses that may lead to an unbalanced performance between the receive path and the transmit path. These losses are indicated in Figs. 2A and 2B as (L1)-(L3).

The first example loss (L1 ) may be due to the duplexer 3032 only being present in one of the receiver paths, such as in the path between the first receiver 3032A and the antenna port. This may cause an unbalance between the two receivers’ performances, since a path loss associated with the duplexer 3032 only affects the path from the antenna port to the first receiver 3033A and not the path from the antenna port to the second receiver 3033B. The second example loss (L2) may be due to one of the antennas, such as the second antenna 3035B, being associated with long routing, such as wiring, and/or a worse performing antenna implementation, than the other antenna this may cause an unbalance between the first antenna 3035A and the second antenna 3035B.

The third example loss (L3) may be due to a routing from the transmitter to one of the antennas, such as to the second antenna 3035B being longer than the routing to the first antenna 3035A, e.g., if it is located close to a remote antenna. This may cause an unbalance between the transmit performances using the different antennas.

Different WD architectures may give raise to different unbalance situations between the transmitter and the receiver of the WD. In for example a sounding reference signal (SRS) based channel status information (CSI) for DL scenario where reciprocity is assumed, if the SRS is transmitted by a weaker power in one of the antennas, caused for example by the example loss L3 in Fig. 2B, the received SRS may not be representative of the actual radio channel conditions, such as quality, between the WD and the radio network node. Reciprocity can herein be seen as the UL propagation channel estimation being equal to the DL propagation channel. In this case the WD may report this unbalance between the transmit path and the receive path to the radio network node, by for example reporting its power properties. The WD may send the report during a registration procedure for registering to the network. The power properties may be indicative of the WD transceiver’s contribution to the transmit path loss and or the receive path loss. The power properties may be reported as an actual path loss (for example in dB) for each receive path and transmit path or as a ratio between each receive path and each transmit path.

In one or more examples, if the SRS signal is weaker due to example loss L2 described above, the same degradation is present for both an UL signal transmitted by the transmitter 3034 via the second antenna port 3035B and a DL signal received by the second receiver 3033B via the same antenna. The received SRS can in this case be considered representative, since the same loss applies for both the transmit path and the receive path. In this case, the WD may report, to the radio network node, a 0 dB unbalance between the transmit path and the receive path, or may refrain from sending a report to the radio network node.

Correspondingly, with regards to the loss L1 shown in Fig. 2A, namely the loss in the duplexer 3032, one of the paths, namely a first receive path via the first receiver 3033A and the transmit path via transmitter 3034, is balanced. This is due to both the first receive path and the transmit path experiencing the losses in the duplexer 3032. The other receive path, such as a second receive path via the second receiver 3033B, has a better receive performance than the first receive path, since the second receive path is directly coupled to the switch 3031 and does not experience the losses in the duplexer 3032.

Accordingly, to ensure that the radio channels, such as the UL radio channel and/or the DL radio channel, are always sounded with a representative power level, both receive path losses and transmit path losses of the WD, such as of the WDs transceiver, may need to be reported. In one or more examples of this disclosure, this may be done by the WD reporting respective path losses for each transmit path and receive path the path losses ratio between a transmit path loss and a receive path loss for each SRS and its associated receive path.

In one or more example methods, the WD may report a ratio of the path loss of each receive path to the path loss of each transmit path to the radio network node. In other words, for a WD comprising N receivers and M transmitters, the WD may report NxM path loss ratios to the radio network node. For example, if the WD, such as the WD transceiver, comprises two receivers and one transmitter, the WD may report two receive path loss ratios. If the WD, such as the WD transceiver, comprises two receivers and two transmitters, the WD may report four receive path loss ratios, one ratio for each receive path loss in relation to each transmit path loss.

A WD having the example WD architecture of Fig. 2A, may report the receive path loss for the first receive path to the first receiver 3033A as a ratio L1-L1 dB (=0) and the receive path loss for the second receive path to the second receiver 3033B as a ratio of 1-L1 dB (assuming effect L1 has a loss of L1 dB).

Similarly, a WD having the example WD architecture of Fig. 2B may report a path loss ratio of 0 dB for the receive path from the first antenna 3035A to the first receiver 3033A and a path loss ratio of L3-1 dB for the receive path from the second antenna 3035B to the second receiver 3033B. The WD may refrain from reporting the path loss caused by L2, as L2 influences both reception and transmission to the same amount. These examples are simplified and all other interconnections are configured to be ideal, however further loss discrepancies, such as losses caused by the switch 3031 , may be included in the report sent to the radio network node.

Fig. 3 shows a flow diagram of an example method 100, performed by a wireless device according to the disclosure, for enabling a radio network node to improve communication with the WD. The wireless device is the wireless device disclosed herein, such as wireless device 300 of Fig. 1 , and Fig. 5. Improving communication can herein be seen as one or more of adapting, scheduling, and precoding the communication with the WD.

The method 100 comprises transmitting S102, to the radio network node, a message indicating power properties of the WD’s transceiver. The power properties are indicative of the transceiver’s contribution to a transmit path loss and the transceiver’s contribution to a receive path loss. The transceiver's contribution to the transmit path loss and/or the receive path loss may be associated with the architecture of the WD, such as with properties of one or more components of the transceiver. In one or more example methods, the transceiver's contribution to the transmit path loss and/or the receive path loss may be due to losses in components of the transceiver, such as in one or more of a filter, a switch, a duplexer, a wiring, and/or an antenna implementation, such as an element.

In one or more example methods, the power properties are preconfigured in the WD. The power properties, such as the respective losses for each transmit path and/or receive path, such as the losses for each component of the respective path, may be preconfigured in the WD upon manufacturing of the WD. During manufacturing the loss of each component may be measured and/or categorized, and this information may be stored in the WD. The respective losses may for example be preconfigured by storing the losses in a memory circuitry of the WD. In one or more example methods, the power properties, such as the respective losses, may be indicated as an actual power loss, such as the power loss in Watts (W). In one or more example methods, the power properties, such as the respective losses, may be indicated as a dimensionless quantity, such as "0.5" meaning that the actual power loss is half the signal power, such as 10 W if the signal power is 20 W, but only 1 W if the signal power is 2 W. In one or more example methods, the power properties, such as the respective losses, may be indicated in decibel (dB).

In one or more example methods, the power properties are indicative of a combination of the transmit path loss and the receive path loss of the transceiver. In one or more example methods, the combination is a ratio of power losses, such as a ratio of power loss related quantities of the respective receive paths and transmit paths.

In one or more example methods, the transmit path loss and the receive path loss are associated with individual reference signal resources, such as time and/or frequency resources, configured to the WD. The WD may for example be configured, by the radio network node, with individual, such as respective, resources for transmitting and/or receiving reference signals, such as SRS, for the receive path and the transmit paths.

In one or more example methods, the power properties are associated with respective antenna ports, such as antenna elements, of the WD. In other words, the WD may report a transmit path loss and a receive path loss between each receiver and/or transmitter and each antenna available for communication for each receiver and/or transmitter.

In one or more example methods, the method 100 comprises transmitting S104, to the radio network node, a reference signal, such as a sounding reference signal. The reference signal may be transmitted using at least one transmit path of the WD’s transceiver. Fig. 4 shows a flow diagram of an example method 200, performed by a radio network node according to the disclosure, for improving communication with a WD. The radio network node is the radio network node disclosed herein, such as radio network node 400 of Fig. 1 and Fig. 6.

The method 200 comprises receiving S202, from a WD, a message indicating power properties of the WD’s transceiver. The power properties are indicative of the transceiver’s contribution to a transmit path loss and the transceiver’s contribution to a receive path loss. The transceiver's contribution to the transmit path loss and/or the receive path loss may be associated with the architecture of the WD, such as with properties of one or more components of the transceiver. In one or more example methods, the transceiver's contribution to the transmit path loss and/or the receive path loss may be due to losses in components of the transceiver, such as in one or more of a filter, a switch, a duplexer, a wiring, and/or an antenna implementation, such as an element.

In one or more example methods, the power properties, such as the respective losses, may be indicated as an actual power loss, such as the power loss in Watts (W). In one or more example methods, the power properties, such as the respective losses, may be indicated as a dimensionless quantity, such as "0.5" meaning that the actual power loss is half the signal power, such as 10 W if the signal power is 20 W, but only 1 W if the signal power is 2 W. In one or more example methods, the power properties, such as the respective losses, may be indicated in decibel (dB).

In one or more example methods, the power properties are associated with individual, such as respective, antenna ports, such as antenna elements, of the WD. In other words, the WD may report a transmit path loss and a receive path loss between each receiver and/or transmitter and each antenna available for communication for each receiver and/or transmitter.

In one or more example methods, the method 200 comprises receiving S203, from the WD, a reference signal, such as a sounding reference signal. The method 200 comprises calibrating S204, based on the power properties, a measured value of a reference signal received from the WD. The radio network node may thus calibrate its channel estimate based on the power properties of the WD. The reference signal value, such as the channel estimate based on the received reference signal, may be used by the radio network node for applying different precoders and/or scheduling traffic to and/or from the WD. By using the calibrated measurement value for performing the radio channel estimation, a more accurate radio channel estimation may be achieved.

In one or more example methods, the method 200 comprises applying S206, based on the calibrated measured value of the reference signal, one or more of a precoder and a scheduling, for communication with the WD. In one or more example methods, applying S206 the precoder may comprise precoding S206A the communication with the WD based on the calibrated measured value, such as based on the received power properties. This allows the radio network node to determine configurations and/or precoding based on the true radio channel conditions of the wireless device. In one or more example methods, applying S206 the precoder may comprise scheduling S206B the communication with the WD based on the calibrated measured value, such as based on the received power properties.

In one or more example methods, the radio network node may configure the WD by indicating the configuration by sending a configuration message comprising an indication to the individual reference signal resources and/or the respective antenna ports of the WD. In other words, the radio network node may provide different configurations for different reference signal resources and/or different antenna ports of the WD. The configuration message may thus comprise an indicator being indicative of the reference signal resources and/or the antenna ports of the WD.

Fig. 5 shows a block diagram of an example wireless device 300 according to the disclosure. The wireless device 300 comprises memory circuitry 301 , processor circuitry 302, and a wireless interface 303, such as a transceiver. The wireless device 300 may be configured to perform any of the methods disclosed in Fig. 3. In other words, the wireless device 300 may be configured for enabling a radio network node to improve communication with the WD.

The wireless device 300 is configured to communicate with a network node, such as the wireless device disclosed herein, using a wireless communication system.

The wireless device 300 is configured to transmit (such as via the wireless interface 303, such as the transceiver), to the radio network node, a message indicating power properties of the WD’s transceiver. The power properties are indicative of the transceiver’s contribution to a transmit path loss and the transceiver’s contribution to a receive path loss. The wireless interface 303 is configured for wireless communications via a wireless communication system, such as a 3GPP system, such as a 3GPP system supporting one or more of: New Radio, NR, Long Term Evolution, LTE, Narrow-band loT, NB-loT, and Long Term Evolution - enhanced Machine Type Communication, LTE-M, and 3GPP system operated in licensed bands or unlicensed bands.

The wireless device 300 is optionally configured to perform any of the operations disclosed in Fig. 3 (such as S102, S104). The operations of the wireless device 300 may be embodied in the form of executable logic routines (for example, lines of code, software programs, etc.) that are stored on a non-transitory computer readable medium (for example, memory circuitry 301 ) and are executed by processor circuitry 302).

Furthermore, the operations of the wireless device 300 may be considered a method that the wireless device 300 is configured to carry out. Also, while the described functions and operations may be implemented in software, such functionality may also be carried out via dedicated hardware or firmware, or some combination of hardware, firmware and/or software.

Memory circuitry 301 may be one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, a random access memory (RAM), or other suitable device. In a typical arrangement, memory circuitry 301 may include a nonvolatile memory for long term data storage and a volatile memory that functions as system memory for processor circuitry 302. Memory circuitry 301 may exchange data with processor circuitry 302 over a data bus. Control lines and an address bus between memory circuitry 301 and processor circuitry 302 also may be present (not shown in Fig. 5). Memory circuitry 301 is considered a non-transitory computer readable medium.

Memory circuitry 301 may be configured to store information (such as information indicative of power properties, path losses, precoders, and/or schedulings) in a part of the memory.

Fig. 6 shows a block diagram of an example radio network node 400 according to the disclosure. The radio network node 400 comprises memory circuitry 401 , processor circuitry 402, and a wireless interface 403. The radio network node 400 may be configured to perform any of the methods disclosed in Fig. 4. In other words, the radio network node 400 may be configured for improving communication with a WD.

The radio network node 400 is configured to communicate with a wireless device, such as the wireless device 300 disclosed herein, using a wireless communication system.

The wireless interface 403 is configured for wireless communications via a wireless communication system, such as a 3GPP system, such as a 3GPP system supporting one or more of: New Radio, NR, Long Term Evolution, LTE, Narrow-band loT, NB-loT, and Long Term Evolution - enhanced Machine Type Communication, LTE-M, and 3GPP system operated in licensed bands or unlicensed bands.

The network node 400 is configured to receive, for example via the wireless interface 403, from the WD, a message indicating power properties of the WD’s transceiver. The power properties are indicative of the transceiver’s contribution to a transmit path loss and the transceiver’s contribution to a receive path loss.

The network node 400 is configured to calibrate, for example using processor circuitry, based on the power properties, a measured value of a reference signal received from the WD.

Processor circuitry 402 is optionally configured to perform any of the operations disclosed in Fig. 4 (such as any one or more of S202, S203, S204). The operations of the network node 400 may be embodied in the form of executable logic routines (for example, lines of code, software programs, etc.) that are stored on a non-transitory computer readable medium (for example, memory circuitry 401 ) and are executed by processor circuitry 402).

Furthermore, the operations of the network node 400 may be considered a method that the network node 400 is configured to carry out. Also, while the described functions and operations may be implemented in software, such functionality may also be carried out via dedicated hardware or firmware, or some combination of hardware, firmware and/or software.

Memory circuitry 401 may be one or more of a buffer, a flash memory, a hard drive, a removable media, a volatile memory, a non-volatile memory, a random access memory (RAM), or other suitable device. In a typical arrangement, memory circuitry 401 may include a nonvolatile memory for long term data storage and a volatile memory that functions as system memory for processor circuitry 402. Memory circuitry 401 may exchange data with processor circuitry 402 over a data bus. Control lines and an address bus between memory circuitry 401 and processor circuitry 402 also may be present (not shown in Fig. 4). Memory circuitry 401 is considered a non-transitory computer readable medium.

Memory circuitry 401 may be configured to store information (such as information indicative of power properties, path losses, precoders, and/or schedulings) in a part of the memory.

Examples of methods and products (wireless device and network node) according to the disclosure are set out in the following items:

Item 1 . A method performed in a wireless device, WD, for enabling a radio network node to improve communication with the WD, the method comprising: transmitting (S102), to the radio network node, a message indicating power properties of the WD’s transceiver, wherein the power properties are indicative of the transceiver’s contribution to a transmit path loss and the transceiver’s contribution to a receive path loss.

Item 2. The method according to Item 1 , wherein the transmit path loss and the receive path loss are associated with individual reference signal resources configured to the WD.

Item 3. The method according to Item 1 or 2, wherein the individual reference signal resources are associated with respective antenna ports of the WD.

Item 4. The method according to any one of the preceding Items, wherein the power properties are indicative of a combination of the transmit path loss and the receive path loss of the transceiver.

Item 5. The method according to Item 4, wherein the combination is a ratio of power losses.

Item 6. The method according to any one of the previous Items, wherein the power properties are preconfigured in the WD.

Item 7. The method according to any one of the previous Items, wherein the transceiver’s contribution to the transmit path loss and/or the transceiver’s contribution to the receive path loss is associated with properties of one or more components of the transceiver.

Item 8. The method according to Item 7, wherein the components comprise one or more of a filter, a switch, a wiring, and an antenna implementation.

Item 9. The method according to any one of the previous Items, wherein the method comprises: transmitting (S104), to the radio network node, a reference signal.

Item 10. A method performed in a radio network node, for improving communication with a WD, the method comprising: receiving (S202), from a WD, a message indicating power properties of the WD’s transceiver, wherein the power properties are indicative of the transceiver’s contribution to a transmit path loss and the transceiver’s contribution to a receive path loss, and calibrating (S204), based on the power properties, a measured value of a reference signal received from the WD.

Item 11. The method according to Item 10, wherein the transmit path loss and the receive path loss are associated with individual reference signal resources configured to the WD.

Item 12. The method according to Item 10 or 11 , wherein the power properties are associated with individual antenna ports of the WD.

Item 13. The method according to any one of the Items 10 to 12, wherein the power properties are indicative of a combination of the transmit path loss and the receive path loss of the transceiver.

Item 14. The method according to Item 13, wherein the combination is a power ratio.

Item 15. The method according to any one of the Items 10 to 14, wherein the transceiver’s contribution to the transmit path loss and/or the transceiver’s contribution to the receive path loss is associated with properties of one or more components of the transceiver.

Item 16. The method according to Item 15, wherein the components comprise one or more of a filter, a switch, a wiring, and an antenna implementation.

Item 17. The method according to any one of the Items 10 to 16, wherein the method comprises: receiving (S203), from the WD, a reference signal.

Item 18. The method according to any one of the Items 10 to 17, wherein the method comprises: applying (S206), based on the calibrated measured value of the reference signal, one or more of a precoder and a scheduling, for communication with the WD.

Item 19. The method according to Item 18, wherein the applying (S206) comprises precoding (S206A) the communication with the WD based on the calibrated measured value of the reference signal.

Item 20. The method according to Item 18, wherein the applying (S206) comprises scheduling S206B the communication with the WD based on the calibrated measured value of the reference signal. Item 21. A wireless device comprising memory circuitry, processor circuitry, and a wireless interface, wherein the wireless device is configured to perform any of the methods according to any of Items 1-9.

Item 22. A radio network node comprising memory circuitry, processor circuitry, and a wireless interface, wherein the radio network node is configured to perform any of the methods according to any of Items 10-20.

The use of the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. does not imply any particular order, but are included to identify individual elements. Moreover, the use of the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. does not denote any order or importance, but rather the terms “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. are used to distinguish one element from another. Note that the words “first”, “second”, “third” and “fourth”, “primary”, “secondary”, “tertiary” etc. are used here and elsewhere for labelling purposes only and are not intended to denote any specific spatial or temporal ordering. Furthermore, the labelling of a first element does not imply the presence of a second element and vice versa.

It may be appreciated that Figures 1-6 comprise some circuitries or operations which are illustrated with a solid line and some circuitries, components, features, or operations which are illustrated with a dashed line. Circuitries or operations which are comprised in a solid line are circuitries, components, features or operations which are comprised in the broadest example. Circuitries, components, features, or operations which are comprised in a dashed line are examples which may be comprised in, or a part of, or are further circuitries, components, features, or operations which may be taken in addition to circuitries, components, features, or operations of the solid line examples. It should be appreciated that these operations need not be performed in order presented. Furthermore, it should be appreciated that not all of the operations need to be performed. The example operations may be performed in any order and in any combination. It should be appreciated that these operations need not be performed in order presented. Circuitries, components, features, or operations which are comprised in a dashed line may be considered optional.

Other operations that are not described herein can be incorporated in the example operations. For example, one or more additional operations can be performed before, after, simultaneously, or between any of the described operations.

Certain features discussed above as separate implementations can also be implemented in combination as a single implementation. Conversely, features described as a single implementation can also be implemented in multiple implementations separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations, one or more features from a claimed combination can, in some cases, be excised from the combination, and the combination may be claimed as any sub-combination or variation of any sub-combination.

It is to be noted that the word "comprising" does not necessarily exclude the presence of other elements or steps than those listed.

It is to be noted that the words "a" or "an" preceding an element do not exclude the presence of a plurality of such elements.

It should further be noted that any reference signs do not limit the scope of the claims, that the examples may be implemented at least in part by means of both hardware and software, and that several "means", "units" or "devices" may be represented by the same item of hardware.

The various example methods, devices, nodes and systems described herein are described in the general context of method steps or processes, which may be implemented in one aspect by a computer program product, embodied in a computer-readable medium, including computerexecutable instructions, such as program code, executed by computers in networked environments. A computer-readable medium 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 (DVD), etc. Generally, program circuitries may include routines, programs, objects, components, data structures, etc. that perform specified tasks or implement specific abstract data types. Computer-executable instructions, associated data structures, and program circuitries represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.

Although features have been shown and described, it will be understood that they are not intended to limit the claimed disclosure, and it will be made obvious to those skilled in the art that various changes and modifications may be made without departing from the scope of the claimed disclosure. The specification and drawings are, accordingly, to be regarded in an illustrative rather than restrictive sense. The claimed disclosure is intended to cover all alternatives, modifications, and equivalents.

Claims

1 . A method performed in a wireless device, WD, for enabling a radio network node to improve communication with the WD, the method comprising: transmitting (S102), to the radio network node, a message indicating power properties of the WD’s transceiver, wherein the power properties are indicative of the transceiver’s contribution to a transmit path loss and the transceiver’s contribution to a receive path loss.

2. The method according to claim 1 , wherein the transmit path loss and the receive path loss are associated with individual reference signal resources configured to the WD.

3. The method according to claim 1 or 2, wherein the power properties are associated with respective antenna ports of the WD.

4. The method according to any one of the preceding claims, wherein the power properties are indicative of a combination of the transmit path loss and the receive path loss of the transceiver.

5. The method according to claim 4, wherein the combination is a ratio of power losses.

6. The method according to any one of the previous claims, wherein the power properties are preconfigured in the WD.

7. The method according to any one of the previous claims, wherein the transceiver’s contribution to the transmit path loss and/or the transceiver’s contribution to the receive path loss is associated with properties of one or more components of the transceiver.

8. The method according to claim 7, wherein the components comprise one or more of a filter, a switch, a wiring, and an antenna implementation.

9. The method according to any one of the previous claims, wherein the method comprises: transmitting (S104), to the radio network node, a reference signal.

10. A method performed in a radio network node, for improving communication with a WD, the method comprising: receiving (S202), from a WD, a message indicating power properties of the WD’s transceiver, wherein the power properties are indicative of the transceiver’s contribution to a transmit path loss and the transceiver’s contribution to a receive path loss, and calibrating (S204), based on the power properties, a measured value of a reference signal received from the WD.

11. The method according to claim 10, wherein the transmit path loss and the receive path loss are associated with individual reference signal resources configured to the WD.

12. The method according to claim 10 or 11 , wherein the power properties are associated with individual antenna ports of the WD.

13. The method according to any one of the claims 10 to 12, wherein the power properties are indicative of a combination of the transmit path loss and the receive path loss of the transceiver.

14. The method according to claim 13, wherein the combination is a power ratio.

15. The method according to any one of the claims 10 to 14, wherein the transceiver’s contribution to the transmit path loss and/or the transceiver’s contribution to the receive path loss is associated with properties of one or more components of the transceiver.

16. The method according to claim 15, wherein the components comprise one or more of a filter, a switch, a wiring, and an antenna implementation.

17. The method according to any one of the claims 10 to 16, wherein the method comprises: receiving (S203), from the WD, a reference signal.

18. The method according to any one of the claims 10 to 17, wherein the method comprises: applying (S206), based on the calibrated measured value of the reference signal, one or more of a precoder and a scheduling, for communication with the WD.

19. The method according to claim 18, wherein the applying (S206) comprises precoding (S206A) the communication with the WD based on the calibrated measured value of the reference signal.

20. The method according to any of claims 18-19, wherein the applying (S206) comprises scheduling (S206B) the communication with the WD based on the calibrated measured value of the reference signal.

21 . A wireless device comprising memory circuitry, processor circuitry, and a wireless interface, wherein the wireless device is configured to perform any of the methods according to any of claims 1-9.

22. A radio network node comprising memory circuitry, processor circuitry, and a wireless interface, wherein the radio network node is configured to perform any of the methods according to any of claims 10-20.