Method and apparatus for identifying interference in a wireless communication system

Abstract

A method and apparatus for identifying interference in a wireless communication system are provided. The method for identifying interference in a wireless communication system of a user equipment comprises: receiving scheduling information from a network node; and detecting whether intermodulation (IM) interference will occur based on the scheduling information.

Description

[0001] BACKGROUND OF THE DISCLOSURE

[0002] 1. Field of the Disclosure

[0003] The present disclosure relates to the field of communication systems, and more particularly, to a method and apparatus for identifying interference in a wireless communication system.

[0004] 2. Description of Related Technology

[0005] In a new radio (NR) system, a user device can transmit signals on multiple carriers while simultaneously receiving signals on multiple carriers. These carriers can use new radio (NR) and / or long-term evolution (LTE) technologies on different frequencies. When the different frequencies of these carriers meet certain conditions, for example, when a combination of multiple different transmit carrier frequencies overlaps or partially overlaps with a receive carrier frequency, the transmitted signal or combination of transmitted signals will interfere with the receive carrier. If multiple transmitted signals interfere with a receiver, the interference is called intermodulation (IM) interference. If a single transmitted signal interferes with a receiver, the interference is called harmonic interference.

[0006] A new technical solution is needed to identify interference in wireless communication systems. Summary of the Invention

[0007] The present disclosure aims to provide a method and apparatus for identifying interference in a wireless communication system.

[0008] In a first aspect of the present disclosure, a user equipment for identifying interference in a wireless communication system includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to control the transceiver to receive scheduling information from a network node and to detect whether intermodulation (IM) interference will occur based on the scheduling information.

[0009] In a second aspect of the present disclosure, a method for identifying interference of a user equipment in a wireless communication system includes: receiving scheduling information from a network node; and detecting whether intermodulation (IM) interference will occur according to the scheduling information.

[0010] In a third aspect of the present disclosure, a network node for identifying interference in a wireless communication system includes a memory, a transceiver, and a processor coupled to the memory and the transceiver. The processor is configured to control the transceiver to send scheduling information to a user equipment (UE); and detect whether intermodulation (IM) interference will occur based on the scheduling information.

[0011] In a fourth aspect of the present disclosure, a method for identifying interference of a network node in a wireless communication system includes: sending scheduling information to a user equipment; and detecting whether intermodulation (IM) interference will occur according to the scheduling information.

[0012] In a fifth aspect of the present disclosure, a non-transitory machine-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a computer, cause the computer to perform the above method.

[0013] In a sixth aspect of the present disclosure, a terminal device includes: a processor and a memory configured to store a computer program. The processor is configured to execute the computer program stored in the memory to perform the above method.

[0014] In a seventh aspect of the present disclosure, a network node includes: a processor and a memory configured to store a computer program. The processor is configured to execute the computer program stored in the memory to perform the above method. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present disclosure or related technologies, the following drawings that will be described in the embodiments are briefly introduced. Obviously, the drawings are only some embodiments of the present disclosure, and ordinary technicians in this field can obtain other drawings based on these drawings without any effort.

[0016] Figure 1 is a block diagram of a user equipment and a network node for identifying interference in a wireless communication system according to an embodiment of the present disclosure.

[0017] Figure 2 is a flowchart illustrating a method for identifying interference of a user equipment according to an embodiment of the present disclosure.

[0018] Figure 3 is a flowchart illustrating a method for identifying interference of a network node according to an embodiment of the present disclosure.

[0019] Figure 4 is a block diagram of a wireless communication system according to an embodiment of the present disclosure.

[0020] Detailed description of the embodiments

[0021] The following describes the embodiments of the present disclosure in detail by referring to the accompanying drawings, through technical themes, structural features, achieved purposes and effects. Specifically, the terms in the embodiments of the present disclosure are only used for the purpose of describing specific embodiments, and are not used to limit the present disclosure.

[0022] Figure 1In some embodiments, a user equipment (UE) 10 and a network node 20 are configured to identify interference in a wireless communication system according to an embodiment of the present disclosure. UE 10 may include a processor 11, a memory 12, and a transceiver 13. Network node 20 may include a processor 21, a memory 22, and a transceiver 23. Processor 11 or 21 may be configured to implement the functions, processes, and / or methods described in this specification. The radio interface protocol layer may be implemented in processor 11 or 21. Memory 12 or 22 may be operatively coupled to processor 11 or 21 and store various information to operate processor 11 or 21. Transceiver 13 or 23 may be operatively coupled to processor 11 or 21 and transmit and / or receive wireless signals.

[0023] The processor 11 or 21 may include an application-specific integrated circuit (ASIC), other chipsets, logic circuits and / or data processing devices. The memory 12 or 22 may include a read-only memory (ROM), a random access memory (RAM), flash memory, a memory card, a storage medium and / or other storage devices. The transceiver 13 or 23 may include a baseband circuit to process radio frequency signals. When the embodiments are implemented in the form of software, the technology described herein may be implemented using modules (e.g., procedures, functions, etc.) that perform the functions described herein. The modules may be stored in the memory 12 or 22 and executed by the processor 11 or 21. The memory 12 or 22 may be implemented inside the processor 11 or 21, or outside the processor 11 or 21. In the case of external implementation, the memory 12 or 22 may be communicatively coupled to the processor 11 or 21 in various ways known in the art.

[0024] According to the sidelink technology developed under Release 16 and later of the 3rd Generation Partnership Project (3GPP) New Radio (NR), communications between UEs involve vehicle-to-everything (V2X) communications, including vehicle-to-vehicle (V2V), vehicle-to-pedestrian (V2P), and vehicle-to-infrastructure / network (V2I / N). UEs communicate directly with each other through a sidelink interface such as a PC5 interface.

[0025] In some embodiments, the processor 11 is configured to control the transceiver 13 to receive scheduling information from the network node 20 and detect whether intermodulation (IM) interference will occur according to the scheduling information.

[0026] In some embodiments, the transceiver 13 is configured to send a report to the network node 20 indicating whether it is feasible for the processor 11 to detect the occurrence of intermodulation interference. The report is sent via dedicated signaling. The dedicated signaling is, for example, radio resource control (RRC) signaling. The transceiver 13 is further configured to receive a signal from the network node 20 indicating that it is feasible for the network node 20 to detect the occurrence of intermodulation interference. The signal received from the network node 20 is dedicated signaling or public signaling.

[0027] In some embodiments, the processor 11 is configured to control the transceiver 13 to indicate a single uplink (UL) transmission to the network node 20, or to control the transceiver 13 to indicate that the user equipment 10 is in a single UL transmission mode.

[0028] In some embodiments, if it is feasible for both the user equipment 10 and the network node 20 to detect that intermodulation interference will occur, the transceiver 13 is configured to receive a signal from the network node 20 indicating a single uplink transmission to the network node 20, or to receive a signal from the network node 20 configuring the user equipment 10 to be in a single uplink transmission mode.

[0029] In some embodiments, the processor 21 is configured to control the transceiver 23 to send scheduling information to the user equipment 10, and detect whether intermodulation (IM) interference will occur based on the scheduling information.

[0030] In some embodiments, the transceiver 23 is configured to receive a report from the user equipment 10 indicating whether it is feasible for the user equipment 10 to detect the occurrence of intermodulation interference. The report is sent by the transceiver 23 via dedicated signaling, such as radio resource control (RRC) signaling.

[0031] In some embodiments, the processor 21 is configured to control the transceiver 23 to send a signal to the user equipment 10 to indicate that it is feasible for the network node 20 to detect that intermodulation interference will occur. The signal received from the network node 20 is dedicated signaling or public signaling.

[0032] In some embodiments, the processor 21 is configured to control the transceiver 23 to send a signal to the user equipment 10 to indicate a single uplink transmission from the user equipment 10 to the network node 20, or to configure the user equipment 10 in a single uplink transmission mode.

[0033] In some embodiments, if it is feasible for both the user equipment 10 and the network node 20 to detect that intermodulation interference will occur, the processor 21 is configured to control the transceiver 23 to send a signal to the user equipment 10 to indicate a single uplink transmission from the user equipment 10 to the network node 20, or to configure the user equipment 10 to be in a single uplink transmission mode.

[0034] Figure 2 A method 200 for identifying interference of a user equipment 10 according to an embodiment of the present disclosure is shown. The method 200 includes: receiving scheduling information from a network node 20 at block 202, and detecting whether intermodulation (IM) interference will occur based on the scheduling information at block 204.

[0035] In some embodiments, the method 200 further includes: sending a report to the network node 20 on whether it is feasible for the user equipment 10 to detect the occurrence of intermodulation interference. The report is sent via dedicated signaling, such as radio resource control (RRC) signaling.

[0036] Figure 3 A method 300 for identifying interference of a network node 20 according to an embodiment of the present disclosure is shown. The method 300 includes: at block 302, sending scheduling information to a user equipment 10; and at block 304, detecting whether intermodulation (IM) interference will occur based on the scheduling information.

[0037] In some embodiments, the method 300 further includes: receiving a report from the user equipment 10 on whether it is feasible for the user equipment 10 to detect the occurrence of intermodulation interference. The report is sent via dedicated signaling, such as radio resource control (RRC) signaling.

[0038] In some embodiments, the method 300 further includes: sending a signal to the user equipment 10, indicating that it is feasible for the network node 20 to detect that intermodulation interference may occur. The signal is dedicated signaling or public signaling.

[0039] In some embodiments, the method 300 further comprises: sending a signal to the user equipment 10 to indicate a single uplink transmission from the user equipment 10 to the network node 20, or configuring the user equipment 10 in a single uplink transmission mode.

[0040] In some embodiments, if it is feasible for both the user equipment 10 and the network node 20 to detect that intermodulation interference will occur, the method 300 also includes: sending a signal to the user equipment 10 to indicate a single uplink transmission from the user equipment 10 to the network node 20, or configuring the user equipment 10 to be in a single uplink transmission mode.

[0041] In some embodiments, a method is provided to address intermodulation interference, which can allow a user device 10 with multiple uplinks to switch between different uplinks, resulting in only one uplink being maintained at a time (simultaneously). If the user device 10 only maintains one uplink at a time, there is no intermodulation interference. The existence of intermodulation interference depends on the uplink transmission bandwidth and the downlink transmission bandwidth, which requires that both the network node 20 and the user device 10 are aware of the existence of intermodulation interference. Embodiments of the present disclosure can solve this problem and provide how both the network node 20 and the user device 10 are able to know the existence of intermodulation interference.

[0042] In some embodiments, on the user equipment 10 side, there is a feasibility issue of whether the user equipment 10 can be aware of the existence of intermodulation interference. An example is that the uplink transmission and the downlink transmission belong to different radio access technologies (RATs), such as long-term evolution (LTE) and new radio (NR) dual connectivity. Specifically, one of the uplink transmission and the downlink transmission is on the LTE side, and the other of the uplink transmission and the downlink transmission is on the NR side. In this example, LTE and NR may be located on different modems. Scheduling information is obtained by different modems respectively. It should be understood that the user equipment 10 needs to aggregate the scheduling information from both LTE and NR, and then the user equipment 10 can determine whether intermodulation interference is likely to occur.

[0043] In some embodiments, to determine whether intermodulation interference is likely to occur, LTE and NR network nodes (e.g., base stations) need to exchange scheduling information on the network node 20. Therefore, similar feasibility issues exist on the network node 20 as on the user equipment 10.

[0044] In order to solve the above problems, such as feasibility issues on the user equipment 10 and the network node 20 side, some embodiments are as follows.

[0045] 1. The user equipment 10 may report to the network node 20 (eg, a base station) whether it is feasible to detect whether intermodulation interference may occur, for example, through scheduling information from the network node 20 .

[0046] 2. It is also feasible that the network node 20 can notify the user equipment 10 through a signal to detect that intermodulation interference may occur.

[0047] 3. If it is feasible for both the user equipment 10 and the network node to detect that intermodulation interference may occur, the network node 20 may notify the user equipment 10 via a signal when the user equipment 10 detects that intermodulation interference may occur that it may indicate a single uplink transmission to the network node 20, or the network node 20 may configure the network device 10 to be in a single uplink transmission mode.

[0048] Specifically, the user equipment report may be dedicated signaling, such as RRC signaling. The network node 20 may use dedicated signaling to notify the user equipment 10 of its feasibility, or the network node 20 may use public signaling such as in system information to notify all user equipments in the cell of its feasibility.

[0049] Figure 4 is a block diagram of an example system 700 for wireless communication according to an embodiment of the present disclosure. The embodiments described herein may be implemented as a system using any suitably configured hardware and / or software. Figure 4 Shown is a system 700. The system 700 includes at least radio frequency (RF) circuitry 710, baseband circuitry 720, application circuitry 730, memory / storage 740, display 750, camera 760, sensor 770, and input / output (I / O) interface 780 coupled to one another as shown.

[0050] Application circuitry 730 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processors may include any combination of general-purpose processors and specialized processors (e.g., graphics processors, application processors). The processors may be coupled to memory / storage and configured to execute instructions stored in the memory / storage to implement various applications and / or operating systems running on the system.

[0051] The baseband circuit 720 may include circuits such as, but not limited to, one or more single-core or multi-core processors. The processor may include a baseband processor. The baseband circuit may handle various wireless control functions for communicating with one or more wireless networks through radio frequency circuits. The wireless control functions may include, but are not limited to, signal modulation, encoding, decoding, radio frequency shifting, etc. In some embodiments, the baseband circuit may provide communications compatible with one or more wireless technologies. For example, in some embodiments, the baseband circuit may support communications with the Evolved Universal Terrestrial Radio Access Network (EUTRAN) and / or other wireless metropolitan area networks (WMANs), wireless local area networks (WLANs), and wireless personal area networks (WPANs). An embodiment in which the baseband circuit is configured to support wireless communications of more than one wireless protocol may be referred to as a multimode baseband circuit.

[0052] In various embodiments, baseband circuitry 720 may include circuitry that operates with signals that are not strictly considered to be within baseband frequencies. For example, in some embodiments, baseband circuitry may include circuitry that operates with signals having an intermediate frequency, where the intermediate frequency is between the baseband frequency and the radio frequency.

[0053] The radio frequency circuit 710 can communicate with a wireless network using modulated electromagnetic radiation through a non-solid medium. In various embodiments, the radio frequency circuit can include switches, filters, amplifiers, etc. to facilitate communication with a wireless network.

[0054] In various embodiments, RF circuitry 710 may include circuitry that operates with signals that are not strictly considered to be within RF. For example, in some embodiments, RF circuitry may include circuitry that operates with signals having an intermediate frequency, where the intermediate frequency is between baseband frequency and RF.

[0055] In various embodiments, the transmitter circuitry, control circuitry, or receiver circuitry discussed above for a user equipment, base station (eNB), or gNB may be embodied in whole or in part as one or more of a radio frequency circuitry, a baseband circuitry, and / or an application circuitry. As used herein, "circuitry" may refer to an application-specific integrated circuit (ASIC), an electronic circuit, a processor (shared, dedicated, or grouped) and / or a memory (shared, dedicated, or grouped) that executes one or more software or firmware programs, a combinational logic circuit, and / or other suitable hardware components that provide the functionality, or are part of or include the aforementioned hardware components. In some embodiments, the electronic device circuitry may be implemented in one or more software or firmware modules, or the functionality associated with the circuitry may be implemented by one or more software or firmware modules.

[0056] In some embodiments, some or all of the components in the baseband circuitry, application circuitry, and / or memory / storage may be implemented together on a system on a chip (SOC).

[0057] Memory / storage 740 may be used to load and store, for example, data and / or instructions for the system. Memory / storage for one embodiment may include any combination of suitable volatile memory (e.g., dynamic random access memory (DRAM)) and / or non-volatile memory (e.g., flash memory).

[0058] In various embodiments, the input / output interface 780 may include one or more user interfaces designed to enable user interaction with the system and / or a peripheral component interface designed to enable peripheral component interaction with the system. The user interface may include, but is not limited to, a physical keyboard or keypad, a touchpad, a speaker, a microphone, etc. The peripheral component interface may include, but is not limited to, a non-volatile memory port, a universal serial bus (USB) port, an audio jack, and a power interface.

[0059] In various embodiments, sensors 770 may include one or more sensing devices to determine environmental conditions and / or location information associated with the system. In some embodiments, sensors may include, but are not limited to, gyroscope sensors, accelerometers, proximity sensors, ambient light sensors, and positioning units. The positioning unit may also be part of, or interact with, baseband circuitry and / or radio frequency circuitry to communicate with components of a positioning network, such as global positioning system (GPS) satellites.

[0060] In various embodiments, the display 750 may include a display such as a liquid crystal display and a touch screen display. In various embodiments, the system 700 may be a mobile computing device such as, but not limited to, a laptop computing device, a tablet computing device, a netbook, an ultrabook, a smartphone, etc. In various embodiments, the system may have more or fewer components and / or different architectures. Where appropriate, the methods described herein may be implemented as a computer program. The computer program may be stored on a storage medium, such as a non-transitory storage medium.

[0061] In an embodiment of the present disclosure, a method and apparatus for identifying interference in a wireless communication system are provided. The embodiments of the present disclosure are a combination of techniques / processes that can be adopted in 3GPP specifications to create a final product.

[0062] Those skilled in the art will appreciate that each unit, algorithm, and step described and disclosed in the embodiments of the present disclosure is implemented using electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed in hardware or software depends on the application conditions and design requirements of the technical solution.

[0063] Those skilled in the art may use different methods to implement the functionality of each specific application, and such implementations should not exceed the scope of this disclosure. Those skilled in the art will understand that they can refer to the operating processes of the systems, devices, and units in the above embodiments, as the operating processes of the above systems, devices, and units are essentially the same. For ease of description and brevity, these operating processes will not be described in detail.

[0064] It should be understood that the systems, devices, and methods disclosed in the embodiments of the present disclosure may be implemented in other ways. The above embodiments are merely exemplary. The division of units is based solely on logical functions, and other divisions may exist in the implementation. Multiple units or components may be combined or integrated into another system. It is also possible to omit or skip certain features. On the other hand, the mutual coupling, direct coupling, or communicative coupling shown or discussed can be achieved indirectly or communicatively through some ports, devices, or units, whether electrically, mechanically, or in other ways.

[0065] The units shown as separate components for illustration may or may not be physically separate. The units shown may or may not be physical units, i.e., located in one place or distributed across multiple network units. Some or all of the units may be used depending on the purpose of the embodiment. In addition, each functional unit in each embodiment may be integrated into a single processing unit, may be physically independent, or may be integrated into a single processing unit comprising two or more units.

[0066] If the software functional unit is implemented, used and sold as a product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution proposed in the present disclosure can be basically or partially implemented in the form of a software product. Alternatively, a part of the technical solution that is beneficial to traditional technology can be implemented in the form of a software product. The software product in the computer is stored in a storage medium, which includes a plurality of commands for a computing device (such as a personal computer, a server or a network device) to run all or part of the steps disclosed in the embodiments of the present disclosure. The storage medium includes a USB disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a floppy disk or other medium capable of storing program code.

[0067] While the present disclosure has been described in connection with what is considered to be the most practical and preferred embodiment, it is to be understood that the disclosure is not limited to the disclosed embodiment, but is intended to cover various arrangements embodied within the broadest interpretation of the appended claims.

Claims

1. A user equipment for identifying interference in a wireless communication system, comprising: Memory; transceiver; and a processor coupled to the memory and the transceiver, Wherein, the processor is configured as follows: controlling the transceiver to receive scheduling information from a network node; and Detecting whether intermodulation (IM) interference will occur based on the scheduling information; wherein the transceiver is configured to send a report to the network node indicating whether it is feasible for the processor to detect that the IM interference will occur; wherein the report is sent via dedicated signaling; wherein the dedicated signaling is radio resource control (RRC) signaling; wherein, if it is feasible for both the user equipment and the network node to detect that the IM interference will occur, and the network node detects that the IM interference may occur when the user equipment detects that the IM interference may occur, the transceiver is configured to receive a signal from the network node indicating a single uplink transmission to the network node, or receive a signal from the network node for configuring the user equipment to be in a single uplink transmission mode.

2. The user equipment of claim 1 , wherein the transceiver is further configured to receive a signal from the network node, wherein the signal indicates to the network node that it is feasible to detect that the IM interference will occur. 3 . The user equipment according to claim 2 , wherein the signal received from the network node is dedicated signaling or public signaling.

4. The user equipment according to any one of claims 1 to 3, wherein the processor is configured to control the transceiver to receive a signal for indicating a single uplink transmission to the network node, or to control the transceiver to receive a signal for indicating that the user equipment is in a single uplink transmission mode.

5. A method for identifying interference of a user equipment in a wireless communication system, comprising: Receive scheduling information from network nodes; as well as Detecting whether intermodulation (IM) interference will occur based on the scheduling information; wherein the method further includes: sending a report to the network node indicating whether it is feasible for the user equipment to detect that the IM interference will occur; wherein the report is sent via dedicated signaling; wherein the dedicated signaling is radio resource control (RRC) signaling; wherein, if it is feasible for both the user equipment and the network node to detect that the IM interference will occur, and the network node detects that the IM interference may occur when the user equipment detects that the IM interference may occur, the method further includes: receiving a signal from the network node indicating a single uplink transmission; or A signal for configuring the user equipment to be in a single uplink transmission mode is received from the network node.

6. The method according to claim 5, wherein the method further comprises: Receiving a signal from the network node, wherein the signal indicates to the network node that the IM interference will occur, is feasible. The method according to claim 6 , wherein the signal received from the network node is dedicated signaling or public signaling.

8. The method according to any one of claims 5 to 7, wherein the method further comprises: A signal is received indicating a single uplink transmission to the network node, or a signal is received indicating that the user equipment is in a single uplink transmission mode.

9. A network node for identifying interference in a wireless communication system, comprising: Memory; transceiver; and a processor coupled to the memory and the transceiver, Wherein, the processor is configured as follows: controlling the transceiver to send scheduling information to the user equipment; and Detecting whether intermodulation (IM) interference will occur based on the scheduling information; wherein the transceiver is configured to receive a report from the user equipment on whether it is feasible for the user equipment to detect that the IM interference will occur; wherein the report is received by the transceiver through dedicated signaling; wherein the dedicated signaling is radio resource control (RRC) signaling; wherein, if it is feasible for both the user equipment and the network node to detect that the IM interference will occur, and the network node detects that the IM interference may occur, when the user equipment detects that the IM interference may occur, the processor is configured to send a signal to the user equipment for indicating a single uplink transmission to the network node, or send a signal for configuring the user equipment to be in a single uplink transmission mode.

10. The network node according to claim 9, wherein: The processor is configured to control the transceiver to send a signal to the user equipment to indicate to the network node whether it is feasible to detect that the IM interference will occur. The network node according to claim 10 , wherein the signal sent by the network node is dedicated signaling or public signaling.

12. The network node according to any one of claims 9 to 11, wherein the processor is configured to control the transceiver to send a signal to the user equipment to indicate a single uplink transmission from the user equipment to the network node, or to configure the user equipment to be in a single uplink transmission mode.

13. A method for identifying interference of a network node in a wireless communication system, comprising: Sending scheduling information to user equipment; as well as detecting whether intermodulation (IM) interference will occur according to the scheduling information; The method further includes: receiving a report from the user equipment on whether it is feasible for the user equipment to detect that the IM interference may occur; wherein the report is sent via dedicated signaling; wherein the dedicated signaling is radio resource control (RRC) signaling; wherein, if it is feasible for both the user equipment and the network node to detect that the IM interference may occur, and the network node detects that the IM interference may occur when the user equipment detects that the IM interference may occur, the method includes: sending a signal to the user equipment to indicate a single uplink transmission from the user equipment to the network node, or configuring the user equipment to be in a single uplink transmission mode.

14. The method according to claim 13, further comprising: It is feasible to send a signal to the user equipment for indicating to the network node that detecting that the IM interference may occur.

15. The method according to claim 14, wherein The signal is dedicated signaling or public signaling.

16. The method according to any one of claims 13 to 15, further comprising: A signal is sent to the user equipment to indicate a single uplink transmission from the user equipment to the network node, or the user equipment is configured in a single uplink transmission mode.

17. A non-transitory machine-readable storage medium having stored thereon instructions which, when executed by a computer, cause the computer to perform the method of any one of claims 5 to 8 and 13 to 16.

18. A terminal device comprising: A processor and a memory configured to store a computer program, the processor being configured to execute the computer program stored in the memory to perform the method of any one of claims 5 to 8.

19. A network node comprising: A processor and a memory configured to store a computer program, the processor being configured to execute the computer program stored in the memory to perform the method of any one of claims 13 to 16.

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