Apparatus and methods for providing information for managing interference between a first sub-network and a second sub-network
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2026-02-05
- Publication Date
- 2026-08-13
Smart Images
Figure EP2026052970_13082026_PF_FP_ABST
Abstract
Description
[0001] R.416579
[0002] - 1 -
[0003] Description
[0004] Title
[0005] Apparatus and methods for providing information for managing interference between a first sub-network and a second sub-network
[0006] Background
[0007] The invention relates to an apparatus and methods for providing information for managing interference between a first sub-network and a second sub-network.
[0008] Interference between sub-networks, i.e., inter-sub-network interference, may occur in wireless communications in sub-networks that are in vicinity of each other.
[0009] Disclosure of the invention
[0010] Managing the inter-sub-network interference with the goal of minimizing or ideally avoiding reguires the ability to detect or predict the inter-sub-network interference.
[0011] A method in a parent network for a first sub-network and a second sub-network of a wireless communications network for providing information for managing interference between the first sub-network and the second sub-network, wherein the method comprises receiving in the parent network a reguest of the first subnetwork for information for managing the interference, sending a reguest for the information from the parent network to the second sub-network, receiving in the parent network a response of the second sub-network comprising the information, sending the information from the parent network to the first subnetwork. The parent network acts as a relay that accepts the reguest from one subnetwork, gets the reguested information from the other subnetwork, and provides the reguested information to the reguesting subnetwork.R.416579
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[0013] The method may use a secure interface for the communication between the parent network and the sub-networks. The Xn interface is an example of the secure interface. The method may comprise obtaining the information necessary to establish the secure interface, e.g., IP addresses, keys, certificates.
[0014] The method in the parent network may comprise establishing a secure interface between the parent network and the first sub-network, and receiving the request from the first sub-network or sending the information to the first sub-network via the secure interface.
[0015] The method may comprise establishing a secure interface between the parent network and the second sub-network, and sending the request to the second sub-network or receiving the response of the second sub-network via the secure interface.
[0016] The method may comprise detecting a sub-network in a vicinity of the first subnetwork as the second sub-network. This is a mechanism to discover a subnetwork that may cause the interference.
[0017] A method in a first sub-network of a wireless communications network for providing information for managing interference between the first sub-network and a second sub-network of the wireless communications network, wherein the method comprises sending a request of the first sub-network for information for managing the interference to a parent network for the first sub-network and the second sub-network, receiving the information from the parent network.
[0018] The method in the first sub-network may comprise establishing a secure interface between the parent network and the first sub-network, and sending the request or receiving the information via the secure interface.
[0019] The method in the first sub-network may comprise detecting a sub-network in a vicinity of the first sub-network as the second sub-network. This is a mechanism in the first sub-network to discover a sub-network that may cause the
[0020] interference.R.416579
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[0022] The method in the first sub-network may comprise determining the interference depending on the information, and taking action, in particular changing a frequency resource allocation, in the first sub-network to avoid or minimize the interference. This minimizes or avoids inter-subnetwork interference between the sub-networks.
[0023] A method in a second sub-network of a wireless communications network for providing information for managing interference between a first sub-network and the second sub-network of the wireless communications network, wherein the method comprises receiving a request of the first sub-network for information for managing the interference from a parent network for the first sub-network and the second sub-network, sending a response of the second sub-network comprising the information to the parent network.
[0024] The method in the second sub-network may comprise establishing a secure interface between the parent network and the second sub-network, and receiving the request or sending the response via the secure interface.
[0025] An apparatus for providing information for managing interference between a first sub-network and a second sub-network of a wireless communications network comprises at least one entity, in particular at least one base station that is configured for executing at least one of the methods.
[0026] A computer program comprises computer-readable instructions that, when executed by a computer, cause the computer to execute at least one of the methods.
[0027] A non-transitory storage medium comprises computer-readable instructions that, when executed by a computer, cause the computer to execute at least one of the methods.
[0028] Further examples are derivable from the following description and the drawing. In the drawing:
[0029] Fig. 1 schematically depicts a wireless communications network,R.416579
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[0031] Fig. 2 depicts a sequence diagram with steps of methods for providing information for managing interference between a first sub-network and the second sub-network of the wireless communications network.
[0032] Figure 1 schematically depicts a wireless communications network 100.
[0033] The wireless communications network 100 comprises a first sub-network 102 and a second sub-network 104.
[0034] The wireless communications network 100 comprises a parent network 106 for the first sub-network 102 and the second sub-network 104.
[0035] The first sub-network 102 may be a cellular network. The second sub-network 104 may be a cellular network. The parent network 106 may be a cellular network.
[0036] The first sub-network 102 comprises at least one entity 102-1.
[0037] The at least one entity 102-1 of the first sub-network 102 is configured for connecting the first sub-network 102 to the parent network 106. The first subnetwork 102 and the parent network 106 may be configured for establishing or communicating via a secure interface. An example of the secure interface is the Xn interface according to 3GPP TS 38.420: "NG-RAN; Xn general aspects and principles.
[0038] The at least one entity 102-1 of the first sub-network 102 is configured for enabling wireless communication between devices or between the at least one entity 102-1 of the first sub-network 102 and a device in the first sub-network 102. An example of the entity 102-1 of the first sub-network 102 is a base station.
[0039] The second sub-network 104 comprises at least one entity 104-1.
[0040] The at least one entity 104-1 of the second sub-network 104 is configured for connecting the second sub-network 104 to the parent network 106. The second sub-network 104 and the parent network 106 may be configured for establishingR.416579
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[0042] or communicating via a secure interface. An example of the secure interface is the Xn interface.
[0043] The at least one entity 104-1 of the second sub-network 104 is configured for enabling wireless communication between devices or between the at least one entity 104-1 of the second sub-network 104 and a device in the second subnetwork 104. An example of the entity 104-1 of the second sub-network 104 is a base station.
[0044] An example of the device is a user equipment.
[0045] The parent network 106 comprises at least one entity 106-1.
[0046] The at least one entity 106-1 of the parent network 106 is configured for connecting the first sub-network 102 and the second sub-network 104 to the parent network 106. The parent network 106 may be configured for establishing or communicating via the secure interface with the first sub-network 102 and the second sub-network 104.
[0047] The at least one entity 106-1 of the parent network 106 is configured for enabling wireless communication between the first sub-network 102 and the second subnetwork 104. An example of the entity 106-1 of the parent network 106 is a base station.
[0048] An example for a sub-network (SN) is a partially or fully autonomous and highly specialized wireless network with limited transmit power and coverage. For example, each SN is a mobile network composed of a single base station and cell. However, in some scenarios the SN may be composed of more base stations and cells.
[0049] An example of the parent network (PN) is a wide area network that provides coverage to the SN, which would need this connection to communicate with the parent network. The PN is for example a mobile network operator's (MNO's) network, or comprises a network beyond the MNO's network, e.g., the Internet.R.416579
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[0051] An exemplary base station is configured to connect user devices to the wireless communications network and enables wireless communication, e.g., via a radio access network (RAN). The RAN is configured for handling the transmission and reception of radio signals between mobile devices and network infrastructure devices. The base station is for example an eNB according to 4G (3GPP TS 23.003 V19.1.0) or a gNB according to 5G (3GPP TS 23.501 V19.2.1) a base station is known, respectively, as eNB and gNB
[0052] An exemplary user equipment (UE) is a device that allows a user to access to the mobile network services via a base station, for example, in a SN or the parent network 106.
[0053] The Xn interface may be the interface between two base stations, e.g., two gNBs in 5G. The Xn interface may be the interface between two SNs each composed of a single base station. The Xn interface is used for example within a backhaul part of the respective cellular network using mmWave or optics on a physical layer.
[0054] According to an example, the Xn Application Protocol (XnAP) is used to exchange messages between the base stations.
[0055] According to an example, the XnAP is extended to be able to send more messages over it, if needed, for inter-SN interference detection and mitigation.
[0056] The Xn interface is used for example between UEs.
[0057] The Xn interface is used for example between UEs via the Uu interface. The Uu interface is the radio interface that enables direct communication between the User Equipment (UE), such as a smartphone or other mobile device.
[0058] The SN may be mobile, e.g., be provided by a mobile base station. The SN may move while it is active.
[0059] For example, the SN is deployed in a vehicle. For example, the MNO has a Service Level Agreement with a manufacturer of the vehicle for allocating certain frequency sub-band(s) or Bandwidth Part(s) (BWPs) to the manufacturer for theR.416579
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[0061] use in the SNs deployed in their vehicles. Since the licensed frequency bands of the MNOs are quite limited, the frequency sub-bands or BWPs allocation cannot be exclusively allocated to a specific vehicle manufacturer and, therefore, have to be re-assigned also to other manufacturers. This implies that each SN-equipped vehicles from the same or even different vehicle manufacturers may be using the same frequency sub-bands or BWPs allocated by the same MNO. This also means that if those vehicles are nearby and actively use the assigned frequency sub-bands or BWPs, they may create inter-sub-network interference. The level of interference would be depended on the amount of overlapping frequency resources used by those SNs, their proximity and the utilization of the spectrum by the SNs. Since interference causes performance decrease, an appropriate improvement is provided by enabling the SNs to
[0062] I. discover the nearby SNs and
[0063] II. manage the interference, e.g., by taking action to detect or predict inter-sub-network interference and consequently mitigate it.
[0064] The information about an SN for managing the interference may comprise:
[0065] - Physical Resource Block (PRB) utilization,
[0066] - cell load,
[0067] - transmit power level,
[0068] - Absolute Frequency Channel Number (ARFCN) of the cell,
[0069] - active BWPs Signal To Noise Ratio
[0070] - heading
[0071] - speed
[0072] - antenna configuration (e.g. direction, antenna gain, beam direction, tilt, azimuth) - Signal-to-lnterference Ratio (SIR),
[0073] - Signal-to-lnterference plus Noise Ratio (SI NR)
[0074] - distance indicator based on position information
[0075] - Neighboring Cell List (NCL)
[0076] - GPS coordinates of the SN(s)
[0077] The ARFCN is a unique identifier for a specific frequency channel within a band. It allows the network to specify the exact frequency or sub-band being used by a base station. In 5G, this is often referred to as New Radio ARFCN (NR-ARFCN).R.416579
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[0079] The BWP is a subset of the carrier bandwidth of the base station that can be assigned to a UE based on different traffic demands and scenarios. The concept of Bandwidth Parts allows for more flexible and efficient use of the spectrum. BWP parameters include the start and size of the BWP within the carrier bandwidth. The active BWP tells us exactly which part of the configured carrier bandwidth is currently being used.
[0080] The managing of the interference may comprise that BWPs can be assigned to SNs. The SN may comprise a scheduler for allocating BWPs to UEs in the SN.
[0081] For example, an operator of the wireless communications network 100 assigns BWPs to the SNs and provides the BWPs at the disposal of the SNs’ schedulers for allocation to the SNs’ UEs.
[0082] Figure 2 depicts a sequence diagram with steps of methods for providing information for managing interference between the first sub-network 102 and the second sub-network 104 of the wireless communications network 100.
[0083] The methods are described by way of example of each SN representing a single cell. The term inter-sub-network interference refers to the inter-cell interference between the single cell of the first sub-network 102 and the single cell of the second sub-network 104. However, each SN can be composed of more than one cell and the method is applied to mitigate the inter-cell interference between multiple cells of the SNs as described for the single cells.
[0084] A SN participating in the method may be deployed in a robot, a vehicle, or be carried by a human body or animal. A SN participating in the method be may remain at a fix geographic location during the method or move. A SN participating in the method may be deployed in an industrial environment.
[0085] The information exchange between SNs and the parent network may use interfaces that are defined in 5G, but typically used over the wired backhaul for inter-cell coordination. An example for interfaces is described in B. Soret, A. D. Domenico, S. Bazzi, N. H. Mahmood and K. I. Pedersen, "InterferenceR.416579
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[0087] Coordination for 5G New Radio," in IEEE Wireless Communications, vol. 25, no.
[0088] 3, pp. 131-137, JUNE 2018, doi: 10.1109 / MWC.2017.1600441.
[0089] The information exchange between SNs and the parent network may use other radio access technologies, in particular on the physical layer, e.g., ad-hoc WLAN network, or 5G Sidelink.
[0090] The information for managing the interference is for example used dynamically adjusting or reconfiguring parameters that affect the interference.
[0091] Exemplary parameters that may be dynamically reconfigured in order to reduce interference are:
[0092] - antenna configuration (tilt, azimuth, direction)
[0093] - BWP to be used
[0094] - transmit power level
[0095] - modulation and coding scheme
[0096] - selection of scheduling algorithms
[0097] - handover parameters
[0098] - power or density of Cell-Specific Reference Signals (CRS)
[0099] A first apparatus for providing information for managing interference between the first sub-network 102 and the second sub-network 104 of the wireless communications network 100 comprises at least one entity is configured for executing the method for providing information for managing interference between the first sub-network 102 and the second sub-network 104 in the first sub-network 102.
[0100] A second apparatus for providing information for managing interference between the first sub-network 102 and the second sub-network 104 of the wireless communications network 100 comprises at least one entity is configured for executing the method for providing information for managing interference between the first sub-network 102 and the second sub-network 104 in the second sub-network 104.R.416579
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[0102] A third apparatus for providing information for managing interference between the first sub-network 102 and the second sub-network 104 of the wireless communications network 100 comprises at least one entity is configured for executing the method for providing information for managing interference between the first sub-network 102 and the second sub-network 104 in the parent network 106.
[0103] The sub-networks in the example are attached to the parent network 106 via the llu interface and are allocated by the same parent network 106, e.g., by a Mobile Network Operator (MNO), the same or partially overlapping frequency bandwidth, or sub-band, or BWPs identified by for example the same ARFCN, consequently resulting in inter-sub-network interference.
[0104] The sub-networks also provided their details (e.g., IP addresses, keys, certificates) to the parent network 106, which can be used to establish an Xn interface exclusively with the parent network 106.
[0105] According to an example, the sub-networks do not allow direct Xn or other interface establishment with other sub-networks.
[0106] The reason for not allowing direct Xn or other interface establishment with other sub-networks is for example security, or limited coverage.
[0107] The same frequency bandwidth, or sub-band, or BWPs could also be allocated to sub-networks by different MNOs if they have a shared bandwidth.
[0108] In an optional step 200, the first sub-network 102 and the parent network 106 establish a secure interface between the parent network 106 and the first subnetwork 102.
[0109] The step 200 is for example executed by the at least one entity 102-1 of the first sub-network 102 and the at least one entity 106-1 of the parent network 106.
[0110] According to an example, a secure Xn interface is established between the first sub-network 102 and the parent network 106 via the pre-established llu interface between them.R.416579
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[0112] For example, the required parent network information (e.g., IP addresses, keys, certificates, etc.) is already known to the first sub-network 102. The first subnetwork 102 establishes a secure Xn interface with the parent network 106.
[0113] In a step 202, a request of the first sub-network 102 for information for managing the interference is sent from the first sub-network 102 to the parent network 106. The request is sent for example via the secure interface between the first subnetwork 102 and the parent network 106.
[0114] The request is for example sent by the at least one entity 102-1 of the first subnetwork 102 and received by the at least one entity 106-1 of the parent network 106.
[0115] The first sub-network 102 or the parent network 106 may detect a sub-network in a vicinity of the first sub-network 102 as the second sub-network 104.
[0116] The first sub-network 102 may periodically or aperiodically request from the parent network 106 the information from the sub-networks in the vicinity of the first sub-network 102.
[0117] The vicinity may be specified with a radius from the first sub-network 102, in particular the requesting entity 102-1 of the first sub-network 102. The radius may be specified with respect the mounting location of the requesting entity 102-1 , in particular on the mobile vehicle.
[0118] The first sub-network 102 may request the information from the parent network 106 via the Xn interface or both Xn and llu interfaces. Both are used for example when the first sub-network 102 observes that the throughput of its UEs drops, SNR decreases, or UEs start moving.
[0119] The requested information is for example the information necessary to find out if there is inter-sub-network interference, to estimate the level of inter-sub-network interference in case inter-sub-network interference is present.R.416579
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[0121] The requested information is for example the information necessary to take appropriate actions to mitigate or avoid inter-sub-network interference.
[0122] The requested information includes, for example, PRB utilization, cell load, transmit power level, ARFCN of the cell, active BWPs, which specify which part of the configured bandwidth is currently being used.
[0123] According to an example, the first sub-network 102 requests the information from the sub-networks within the specified radius via the parent network 106.
[0124] The radius specified in the request to identify the sub-networks in the vicinity may be selected to be larger than a range of the first sub-network 102, since no direct Xn interface will be established between the sub-networks. This allows the first sub-network 102 to find out the radio resource utilization details of the other subnetworks in the vicinity even before having overlapping coverage and, thereby, enable them to detect overlapping radio resources (e.g., BWPs, PRBs) and change the resource allocation in advance in order to avoid inter-sub-network interference once the sub-networks approach each other and their sub-network coverages overlap.
[0125] According to an example, the sub-networks can pass their GPS coordinates to the parent network 106 via the Xn or llu interface in order to help the parent network 106 in the estimation of the sub-networks positions, thereby more accurately identifying other sub-networks within the specified radius.
[0126] Since revealing of location information and location tracking as a consequence, typically is a concern of privacy, the following two remarks address potential mitigation approaches to that:
[0127] In an example, the request for information including the location and radius, is not directly answered by the parent network 106, but forwarded to a larger set of subnetworks. This way, the sub-networks can decide themselves if they want to reveal their position for the purpose of interference management by answering the request or not.R.416579
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[0129] In an example, a sub-network or the parent network 106 might request a “proof of interference” before providing detailed information about configuration and / or location. Therefore, the sub-network affected by the interference would have to successfully receive and decode information from the interfering sub-network and include that information within the request to provide a respective proof. The information from the interfering sub-network is for example the cell identifier, sector ID, or beam ID of the interfering sub-network.
[0130] In an optional step 204, a secure interface is established between the parent network 106 and the second sub-network 104.
[0131] The secure interface is for established by or between the at least one entity 104-1 of the second sub-network 104 and the at least one entity 106-1 of the parent network 106.
[0132] According to an example, a secure Xn interface is established between the second sub-network 104 and the parent network 106 via the pre-established llu interface between them.
[0133] For example, the required parent network information (e.g., IP addresses, keys, certificates, etc.) is already known to the second sub-network 104. The second sub-network 104 establishes a secure Xn interface with the parent network 106.
[0134] The parent network 106 for example, identifies the sub-networks in the vicinity of the first sub-network 102 based on the location of the first sub-network 102 and the specified radius. According to an example, then, the parent network 106 establishes an Xn interface with those sub-networks in the vicinity.
[0135] For example, the parent network finds only the second sub-network 104 in the vicinity of the first sub-network 102. According to an example, then, the parent network 106 establishes a secure Xn interface with the second sub-network 104, unless already established.
[0136] In a step 206, a request for the information is sent from the parent network 106 to the second sub-network 104. The request is sent for example via the secure interface between the second sub-network 104 and the parent network 106.R.416579
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[0138] The request is for example sent by the at least one entity 106-1 of the parent network 106 and received by the at least one entity 104-1 of the second subnetwork 104.
[0139] According to an example, the parent network 106, based on the request by the first sub-network 102, periodically or aperiodically requests from the subnetworks in the vicinity of the first sub-network 102 the information necessary to find out if there is inter-sub-network interference.
[0140] According to an example, the parent network 106 estimates the level of the inter-sub-network interference in case inter-sub-network interference is present.
[0141] According to an example, the parent network 106 takes appropriate actions to mitigate or avoid the inter-sub-network interference.
[0142] This information could include, for example, PRB utilization, cell load, transmit power level, ARFCN of the cell, active BWPs, which specify which part of the configured bandwidth is currently being used (see 2.4.1). In the shown example, the parent network will request from SN2 the information mentioned in SN1 request in Step 2.
[0143] In a step 208, a response of the second sub-network 104 comprising the information is sent from the second sub-network 104 to the parent network 106. The request is sent for example via the secure interface between the second sub-network 104 and the parent network 106.
[0144] The response is for example sent by the at least one entity 104-1 of the second sub-network 104 and received by the at least one entity 106-1 of the parent network 106.
[0145] The sub-networks receiving the request from the parent network 106 may provide the requested information. For example, the second sub-network 104 provides the requested information to the parent network 106 over the Xn interface or both Xn and llu interfaces.R.416579
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[0147] In a step 210, the information is sent from the parent network 106 to the first subnetwork 102. The information is sent for example via the secure interface between the first sub-network 102 and the parent network 106.
[0148] The information is for example sent by the at least one entity 106-1 of the parent network 106 and received by the at least one entity 102-1 of the first sub-network 104.
[0149] According to an example, the parent network 106 forwards the information received from second sub-network 104 to the first sub-network 102, in particular over the Xn interface.
[0150] The parent network 106 may be requested by multiple sub-networks for the information. The parent network 106 may request and receive the information based on the request from the multiple sub-networks from multiple sub-networks. Once received the information from the sub-networks, the parent network 106 may forward it to the requesting sub-networks, in particular over the Xn interface with them.
[0151] According to an example, the parent network 106 may pass to the sub-network radio resource utilization information of other non-sub-network UEs within the specified radius or in the nearby area. This helps in interference detection since the interference could be caused not only by the nearby sub-networks, but also by the nearby UEs using overlapping frequency resources.
[0152] In a step 212, the first sub-network 102 determines the interference depending on the information.
[0153] For example, the information comprises at least one of the parameters of the second sub-network 104.
[0154] The first sub-network 102 may compare the received parameters with its own parameters to find out if there is an overlap in the radio resources used or scheduled to be used by the second sub-network 102.R.416579
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[0156] For example, first sub-network 102 checks if the second sub-network 104 use the same ARFCN, the same BWP(s), if they are scheduling the same PRBs to their subscribers.
[0157] According to an example, the first sub-network 102 finds out that the second subnetwork 104 is using the same ARFCN and the same BWP1.
[0158] In a step 214, the first sub-network 102 takes action.
[0159] For example, the first sub-network 102 changes at least one of the parameters to avoid or minimize the interference.
[0160] For example, the first sub-network 102 changes a frequency resource allocation, in the first sub-network 102 to avoid or minimize the interference.
[0161] Once the inter-sub-network interference has been detected, the first sub-network 102 may take the necessary measures to avoid utilization of the same radio resources in order to avoid the inter- sub-network interference as much as possible. These measures, among others, may include, changing the active BWP, scheduling different PRBs to the subscribers (to ensure use of nonoverlapping in time- and frequency domain), reducing the transmit power of the first sub-network 102 to the minimum acceptable level, reducing the transmit power of the first sub-network 102 until a pre-defined threshold of interference is reached, or changing the ARFCN in case the first sub-network 102 has been allocated multiple ARFCNs from the MNO.
[0162] According to an example, the first sub-network 102 dynamically changes the active BWP from BWP1 to BWP2, thereby making sure that it is different from the BWP used by the second sub-network 104, which in turn will result in ideally inter-SN avoidance.
[0163] The methods are not limited to two sub-networks. The first sub-network 102 may be configured to request and receive information from more than one subnetwork. The parent network 106 may be configured to receive the request for information from more than one sub-network, send the respective request to the respective sub-network, receive the responses from the sub-networks and sendR.416579
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[0165] the responses to the first sub-network 102. The first sub-network 102 may be configured to detect the interference depending on the received responses. The first sub-network 102 may be configured to adjust at least one of the parameters depending on the interference detected depending on the received responses.
[0166] The sub-networks don’t have to rely on the parent network 106 for detecting the inter-sub-network interference and recommending changing this their configuration. Instead, the sub-networks can do this on their own.
Claims
R.416579- 18 -Claims1. A method in a parent network (106) for a first sub-network (102) and a second sub-network (104) of a wireless communications network (100) for providing information for managing interference between the first subnetwork (102) and the second sub-network (104), wherein the method comprisesreceiving (202) in the parent network (106) a request of the first subnetwork (102) for information for managing the interference, sending (206) a request for the information from the parent network (106) to the second sub-network (104),receiving (208) in the parent network (106) a response of the second sub-network (104) comprising the information,sending (210) the information from the parent network (106) to the first sub-network (102).
2. The method according to claim 1, wherein the method comprises establishing (200) a secure interface between the parent network (106) and the first sub-network (102), andreceiving (202) the request from the first sub-network (102) or sending (210) the information to the first sub-network (102) via the secure interface.
3. The method according to one of the preceding claims, wherein the method comprisesestablishing (204) a secure interface between the parent network (106) and the second sub-network (104), andsending (206) the request to the second sub-network (104) or receiving (208) the response of the second sub-network (104) via the secure interface.
4. The method according to one of the preceding claims, wherein the method comprisesR.416579- 19 -detecting a sub-network in a vicinity of the first sub-network (102) as the second sub-network (104).
5. A method in a first sub-network (102) of a wireless communications network (100) for providing information for managing interference between the first sub-network (102) and a second sub-network (104) of the wireless communications network (100), wherein the method comprises sending (202) a request of the first sub-network (102) for information for managing the interference to a parent network (106) for the first subnetwork (102) and the second sub-network (104),receiving (210) the information from the parent network (106).
6. The method according to claim 5, wherein the method comprises establishing (200) a secure interface between the parent network (106) and the first sub-network (102), andsending (202) the request or receiving (210) the information via the secure interface.
7. The method according to one of the claims 5 or 6, wherein the method comprisesdetecting a sub-network in a vicinity of the first sub-network (102) as the second sub-network (104).
8. The method according to one of the claims 5 to 7, wherein the method comprisesdetermining (212) the interference depending on the information, and taking action (214), in particular changing a frequency resource allocation, in the first sub-network (102) to avoid or minimize the interference.
9. A method in a second sub-network (104) of a wireless communications network (100) for providing information for managing interference between a first sub-network (102) and the second sub-network (104) of the wireless communications network (100), wherein the method comprisesR.416579- 20 -receiving (206) a request of the first sub-network (102) for information for managing the interference from a parent network (106) for the first subnetwork (102) and the second sub-network (104),sending (208) a response of the second sub-network (104) comprising the information to the parent network (106).
10. The method according to claim 9, wherein the method comprises establishing (204) a secure interface between the parent network (106) and the second sub-network (104), andreceiving (206) the request or sending (208) the response via the secure interface.
11. An apparatus for providing information for managing interference between a first sub-network (102) and a second sub-network (104) of a wireless communications network (100), wherein the apparatus comprises at least one entity, in particular at least one base station (102-1, 104-1, 106-1), that is configured for executing the method according to one of the claims 1 to 10.
12. A computer program, characterized in that the computer program comprises computer-readable instructions that, when executed by a computer, cause the computer to execute the method according to one of the claims 1 to 10.
13. A non-transitory storage medium, characterized in that the storage medium comprises computer-readable instructions that, when executed by a computer, cause the computer to execute the method according to one of the claims 1 to 10.