Parent net independent configuration of a sub-subnet in a wireless communication system

Abstract

A method for a parent net (12) independent configuration of a sub-subnet (22) in a wireless communication system (10) comprising a parent net (12) and a subnet (14) connectable or connected to the parent net (12), wherein the method (100) comprises: - Receiving, by a subnet control unit (18) of the subnet (14), a sub-subnet enablement information which indicates that a sub-subnet (22) may be configured, by the subnet (14), independently of the parent net (12); and - Based on the received sub-subnet enablement information, configuring the sub-subnet (22) by the subnet control unit (18).

Description

[0001] R. 418039

[0002] - 1 -

[0003] Specification

[0004] Title

[0005] Method for a parent net independent configuration of a sub-subnet in a wireless communication system

[0006] The invention concerns a method for a parent net independent configuration of a sub-subnet in a wireless communication system, and a corresponding method for transmitting a sub-subnet enablement information in a wireless communication system. Further, the invention concerns a node of a wireless communication system, a subnet or parent net of a wireless communication system, a wireless communication system, a computer program, and a non-transitory computer readable medium. Moreover, the invention concerns a data structure and a data carrier signal.

[0007] Background

[0008] Subnetworks or subnets are use-case specific (partial-)autonomous local networks which can be formed under the control of a parent net, e.g., a public network like a public land mobile network (PLMN). A controller unit called subnetwork controller or subnetwork management entity is configured to manage and control the devices inside a subnetwork. Radio resources for the subnetwork are allocated by the parent network in a bulk manner. Respective configurations are provided by the parent network via the subnetwork controller to the devices inside a subnetwork.

[0009] Local communication between devices in a subnetwork can be done directly between them or through the subnetwork controller. The subnetwork controller can allocate the required resources for the local communication from the bulk resources which have been allocated by the parent network. To form and establish subnetworks, there is a need for support by the parent network in terms of signaling and protocols. Besides, subnetworks can have different types depending on the use case requirements. A subnetwork itself can also contain several layers of nested subnetworks.R. 418039

[0010] - 2 -

[0011] Disclosure of the invention

[0012] According to a first aspect, there is provided a method for a parent net independent configuration of a sub-subnet in a wireless communication system comprising a parent net and a subnet connectable or connected to the parent net The method according to the first aspect comprises:

[0013] Receiving, by a subnet control unit of the subnet, a sub-subnet enablement information which indicates that a sub-subnet may be configured, by the subnet, independently of the parent net; and Based on the received sub-subnet enablement information, configuring the sub-subnet by the subnet control unit, specifically independently of the parent net.

[0014] The method according to the first aspect can be understood as a method for wireless communications, specifically of operating the subnet control unit of the subnet.

[0015] According to a second aspect, there is provided a method for transmitting a subsubnet enablement information in a wireless communication system comprising a parent net and a subnet connectable or connected to the parent net. The method according to the second aspect comprises:

[0016] Transmitting, by a node of the parent net, a sub-subnet enablement information to a subnet control unit of the subnet, wherein the sub-subnet enablement information indicates that a sub-subnet may be configured, by the subnet, independently of the parent net.

[0017] The method according to the second aspect can be understood as a method for wireless communications, specifically of operating the node of the parent net.

[0018] According to a third aspect, there is provided a node, preferably a node of the parent net, e.g., a base station, gNB, or a node of the subnet, e.g., a subnet control unit, of a wireless communication system. The node is adapted to execute the method(s) according to the first and / or the second aspect, or its embodiments. Preferably, the node comprises

[0019] a radio modem,R. 418039

[0020] - 3 -

[0021] a non-transitory computer readable medium comprising machine-readable instructions, and

[0022] a processor configured to load and to execute the machine-readable instructions to cause the node to execute the method(s) according to the first aspect and / or the second aspect, or its embodiments.

[0023] According to a fourth aspect, there is provided a subnet or a parent net of a wireless communication system.

[0024] According to a fifth aspect, there is provided a wireless communication system comprising a parent net according to a first alternative of the fourth aspect, and / or its embodiments, and a subnet according to a second alternative of the fourth aspect, and / or its embodiments, wherein the subnet is connectable or connected to the parent net.

[0025] According to a sixth aspect, there is provided a computer program comprising machine-readable instructions to cause the node as defined by the third aspect to execute the method(s) according to the first and / or the second aspect, and / or its embodiments.

[0026] According to a seventh aspect, there is provided a non-transitory computer readable medium having stored thereon the computer program as defined by the sixth aspect.

[0027] According to an eighth aspect, there is provided a data structure, specifically a system information block, SIB, message, or a downlink control information, DCI, or a radio resource control, RRC, information element, for a wireless communication system comprising a parent net and a subnet connectable or connected to the parent net, wherein the data structure comprises a data field with a sub-subnet enablement information, which indicates that a sub-subnet may be configured, by the subnet, independently of the parent net.

[0028] According to a ninth aspect, there is provided a data carrier signal carrying the computer program as defined by the sixth aspect, and / or its embodiments, or the data structure as defined by the eighth aspect, and / or its embodiments.R. 418039

[0029] - 4 -

[0030] The wireless communication system may be configured as a cellular network, preferably according to 3GPP specifications, or as a wireless Local Area Network (LAN), preferably according to IEEE specifications. The wireless communication system comprises the parent net and at least one subnet or subnetwork. The parent net may be, e.g., a public land mobile network (PLMN). The subnet may be an in-vehicle subnet, e.g., a subnet comprising infotainment devices in the vehicle, or a subnet of multiple robots and / or automated guided vehicles (AGV) on a factory floor.

[0031] The subnet control unit is preferably adapted for configuring and / or managing the subnet, specifically one or multiple (radio) nodes of the subnet, particularly one or multiple sub-subnets which are part of the subnet. In other words, the subnet control unit may be understood as a subnet controller or subnet management entity.

[0032] The subnet control unit may be adapted to share configuration and management functions with the parent network for controlling the subnet. Specifically, the parent net may configure the subnet control unit to handle control and / or radio resource management (RRM) functions to maintain quality of service requirements within the subnet.

[0033] A sub-subnet can be understood as a nested subnet, i.e., a subnet within the subnet. A subnet may have multiple nesting layers, i.e., the sub-subnet itself may one or multiple nested subnets (sub-sub-subnets).

[0034] The sub-subnet enablement information indicates that a sub-subnet or nested subnet may be configured, by the subnet, independently of the parent net. In particular, the sub-subnet or nested subnet is configured and / or managed and / or controlled, by the subnet, independently of the parent net, i.e., without interaction or involvement from the parent net. Specifically, the sub-subnet or nested subnet is not configured by the parent net.

[0035] The sub-subnet enablement information may be represented by a flag or a bit, which may have a first value indicating that parent net independent sub-subnet configuration is enabled, authorized, or permitted and a second value indicating that parent net independent sub-subnet configuration is disabled, not authorized, or not permitted. In other words, configuring and / or controlling and / or managingR. 418039

[0036] - 5 -

[0037] nested subnets without interaction or involvement from the parent net is enabled or disabled by the parent net The sub-subnet enablement information may further indicate that multiple sub-subnets and / or a sub-subnet with multiple nesting layers may be configured, by the subnet, independently of the parent net.

[0038] The independently configured sub-subnet can be understood as a - from a perspective of the parent net - transparenl / non-visible nested subnet.

[0039] Particularly, no information about the transparenl / non-visible sub-subnet may be provided to the parent net. Preferably, each transparent nested subnet is only controlled and configured by its direct parent subnet, thus being transparent from a public network (parent net) point of view.

[0040] In other words, the sub-subnet enablement information is an indication provided by the parent net to the subnet whether the subnet is allowed to have one or multiple transparent sub-subnets or not. In case the sub-subnet enablement information indicates that the sub-subnet is transparent, i.e., configured independently from the parent net, no configuration information for the transparent sub-subnet(s) will be provided by the parent net to the subnet.

[0041] A transparent nested subnet or transparent sub-subnet may comprise a local sub-subnet control unit which is adapted to configure, e.g., allocate resources to, manage and control devices inside the transparent nested subnet. Alternatively, a subnet control unit of the respective parent subnet is adapted to configure, e.g., allocate resources to, manage and control devices inside the transparent nested subnet.

[0042] Additionally or as an alternative to the transparenl / non-visible nested subnet, the subnet may also comprise one or multiple visible / non-transparent nested subnet(s). A visible / non-transparent nested subnet can be understood as a subsubnet whose configuration and / or control and / or management is either performed by the parent net itself or for which at least some information, specifically about its existence, is provided to the parent net.

[0043] Configuring the sub-subnet may comprise allocating resources to the devices of the sub-subnet, managing and controlling the devices of the subnet, setting up parameters related to radio resource management, scheduling, interference mitigation, device mobility handling etc.R. 418039

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[0045] The proposed solution addresses the challenges posed to the parent net by complex, specifically multi-layered nested subnets. Enabling subnets to independently configure, manage, and control their own sub-subnets significantly reduces signaling load on the parent net, enhancing both subnet management flexibility and radio resource utilization. This allows nested subnets to be dynamically established, configured, and dissolved as needed by the parent subnet. This transparent nested subnetwork approach simplifies public network management by handling the complexities of numerous nested subnets within the subnets themselves.

[0046] According to an embodiment of the first aspect, the method further comprises:

[0047] Receiving, by the subnet control unit, a sub-subnet establishment information which indicates that a sub-subnet may be established by the subnet; and

[0048] Based on the received sub-subnet establishment information, establishing, by the subnet control unit, the sub-subnet prior to the configuring of the sub-subnet.

[0049] Establishing the sub-subnet may comprise setting up the sub-subnet, determining a scope of the sub-subnet, e.g., based on a defined spatial area or zone and / or a frequency band, identifying devices to be included in the subsubnet, assigning an identifier to the sub-subnet. The established sub-subnet may be a nested subnet to be configured independently of the parent net, or a nested subnet configured by or with involvement of the parent net.

[0050] The sub-subnet establishment information may be comprised by the same signalling or message as the sub-subnet enablement information. The subsubnet establishment information may also be received prior to the sub-subnet enablement information.

[0051] This allows the parent net to flexibly enable the subnet to establish nested subnets. Alternatively, the sub-subnet establishment information may be received, by the subnet, when the subnet itself is established by the parent net.

[0052] According to an embodiment of the first aspect, the method further comprises Transmitting, by the subnet control unit, a sub-subnet establishment request and / or a sub-subnet enablement request to a node of the parentR. 418039

[0053] - 7 -

[0054] net for requesting that a sub-subnet may be established and / or configured by the subnet independently of the parent net,

[0055] wherein the sub-subnet establishment information and / or the sub-subnet enablement information is received in response to the respective transmitted request.

[0056] In analogy, according to an embodiment of the second aspect, the method further comprises:

[0057] Receiving, by the node of the parent net, a sub-subnet establishment request and / or a sub-subnet enablement request from the subnet control unit which comprises a request that a sub-subnet may be established and / or configured by the subnet independently of the parent net, wherein the sub-subnet establishment information and / or the sub-subnet enablement information is transmitted, by the node of the parent net, in response to the respective received request.

[0058] The sub-subnet establishment request may be comprised by the same signalling or message as the sub-subnet enablement request. The sub-subnet establishment request may also be transmitted prior to the sub-subnet enablement request. This allows the subnet net to flexibly request for establishing and / or configuring nested subnets based on its current requirements.

[0059] According to an embodiment of the first aspect, configuring the sub-subnet comprises transmitting a sub-subnet configuration information to the sub-subnet. In analogy, according to an embodiment of the second aspect, the method further comprises

[0060] Transmitting, by the node of the parent net, a sub-subnet establishment information which indicates that a sub-subnet may be established by the subnet control unit.

[0061] The sub-subnet configuration information may be contained in a configuration message. The sub-subnet configuration may be transmitted to a sub-subnet control unit or sub-subnet management entity, and / or one or multiple devices of the sub-subnet. The sub-subnet configuration information may, e.g., comprise an indication of resources allocated for the sub-subnet. This allows for handling configuration details independently from the parent net, reducing its processing load and simplifying the configuration process.

[0062] According to an embodiment of the first aspect, the sub-subnet configuration information is contained in an information element of a user equipment, UE,R. 418039

[0063] - 8 -

[0064] assistance information. To this end, one or multiple information elements may be added to a UE assistance information as specified by 3GPP. This allows to exploit existing signaling with minimal modifications for carrying required configurations between subnet control unit and the nested subnet control unit and / or nested subnet devices.

[0065] According to an embodiment of the first aspect, the sub-subnet configuration information is contained in a sidelink control information, SCI. To this end, one or multiple data fields may be added to a 1st stage or 2nd stage SCI message as specified by 3GPP. This allows to exploit existing signaling with minimal modifications for carrying required configurations between subnet control unit and the nested subnet control unit and / or nested subnet devices.

[0066] According to an embodiment of the first aspect, the sub-subnet configuration information is transmitted to the sub-subnet using a radio interface different from a cellular interface. The radio interface may be, e.g., a Bluetooth or Wi-Fi interface. This allows to exploit existing radio technologies with no or minimal modifications for carrying required configurations between subnet control unit and the nested subnet control unit and / or nested subnet devices.

[0067] The method according to one of the preceding claims, further comprising:

[0068] Receiving, by the subnet control unit, a grant of radio resources for the subnet,

[0069] wherein the granted resources are allocated for one or multiple nodes of the sub-subnet, by the subnet control unit, independently of the parent net.

[0070] This allows for a flexible allocation of radio resources assigned to the subnet between different nested subnets and / or different devices within the respective nested subnet without interaction or involvement of the parent net.

[0071] According to an embodiment of the first and / or second aspect, the sub-subnet enablement information and / or the sub-subnet establishment information is contained in a system information block, SIB, message. The SIB message may be a SIB message specifically provided for subnetworking. The SIB message may also be a SIB 12 message which contains 3GPP NR sidelink communication configuration information and at least one additional data field for indicating the sub-subnet enablement information and / or the sub-subnet establishmentR. 418039

[0072] - 9 -

[0073] information. For example, a first flag of the SIB message may indicate whether nested subnetworking is enabled or disabled. A second flag of the SIB message may indicate whether the nested subnet may be configured by the parent net (visible / non-transparent nested subnet) or independently of the parent net (transparenl / non-visible nested subnet). This allows to implement the proposed solution with existing signaling or only minimal modifications to existing signaling in the communication system.

[0074] According to an embodiment of the first and / or second aspect, the sub-subnet enablement information and / or the sub-subnet establishment information is contained in a downlink control information, DCI. The DCI is preferably transmitted on a Physical Downlink Control Channel (PDCCH) of the wireless communication system, e.g., in response to a scheduling request, or an assistance information. The response or the assistance information may be transmitted from the subnet, specifically from a subnet control unit of the subnet, to the parent net.

[0075] The DCI may contain at least one additional data field for indicating the subsubnet enablement information and / or the sub-subnet establishment information. For example, a first flag of the DCI may indicate whether nested subnetworking is enabled or disabled. A second flag of the DCI may indicate whether the nested subnet may be configured by the parent net (visible / non-transparent nested subnet) or independently of the parent net (transparent / non-visible nested subnet). This allows to implement the proposed solution with existing signaling or only minimal modifications to existing signaling in the communication system.

[0076] According to an embodiment of the first and / or second aspect, the sub-subnet enablement information and / or the sub-subnet establishment information is contained in a radio resource control, RRC, information element. The RRC information element may be transmitted from a node of the parent net, e.g., a base station, gNB, to the subnet, specifically to a subnet control unit, of the subnet, e.g., during RRC connection (re-)establishment procedure.

[0077] The RRC information element may contain at least one data field for indicating the sub-subnet enablement information and / or the sub-subnet establishment information. For example, a first flag of the RRC information element may indicate whether nested subnetworking is enabled or disabled. A second flag ofR. 418039

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[0079] the RRC information element may indicate whether the nested subnet may be configured by the parent net (visible / non-transparent nested subnet) or independently of the parent net (transparenl / non-visible nested subnet). This allows to implement the proposed solution with existing signaling or only minimal modifications to existing signaling in the communication system

[0080] According to an embodiment of the eighth aspect, the data structure further comprises at least one further data field with a sub-subnet establishment information, which indicates that a sub-subnet may be established by the subnet, wherein the sub-subnet establishment information preferably further indicates a number of nesting layers for nesting multiple sub-subnets, and / or a (maximum) number of sub-subnets which may be established by the subnet control unit, and / or

[0081] whether the sub-subnet(s) comprise a sub-subnet control unit or are controlled by a subnet control unit, and / or

[0082] whether the sub-subnet(s) may be established temporarily, and / or a maximum duration the sub-subnet(s) may exist.

[0083] This allows for an efficient provision of configuration and establishment information from the parent net to the subnet.

[0084] The non-transitory computer readable medium is preferably configured to store the computer program to be executed by a processor of the subnet control unit and / or the node of the parent net and / or the communication system. The non-transitory computer readable media may include RAM, ROM, EEPROM, and any other non-volatile storage device.

[0085] Description of the figures

[0086] Exemplary embodiments of the present invention are depicted in the figures, which are not to be construed as limiting the claims, and are explained in greater detail below.

[0087] Fig. 1 schematically illustrates a wireless communication system according to an aspect of the invention; and

[0088] Fig. 2A,B,C schematically illustrates methods according to embodiments of the invention.R. 418039

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[0090] Fig. 1 schematically illustrates a wireless communication system 10 according to an aspect of the invention. The communication system 10 is configured as a cellular communication system 10. The communication system 10 comprises a parent net 12, a first subnet 14 and a second subnet 16. The parent net 12 is a public land mobile network (PLMN).

[0091] The first subnet 14 comprises a first subnet controller 18. The second subnet 16 comprises a second subnet controller 20. The first subnet 14 is connected to the parent net 12 via the first subnet controller 18. The second subnet 16 is connected to the parent net 12 via the second subnet controller 20. Each of the subnets 16, 18 may comprise one or multiple subnet nodes or subnet devices (not displayed in Fig. 1), which are controlled and / or managed by the respective subnet controller 18, 20.

[0092] According to this embodiment, a node of the parent net 12, e.g., a base station or a core network node, configures the first subnet 14 to establish sub-subnets 22, 24, also called nested subnets 22, 24. To this end, the node of the parent net 12 is configured to transmit a sub-subnet establishment information to the first subnet controller 18. The sub-subnet establishment information indicates that one or multiple sub-subnets 22, 24 or nested subnets 22, 24 may be established by the first subnet control unit 18.

[0093] In other words, the parent net 12, e.g. the PLMN, is adapted to configure the first subnet 14 to allow its responsible subnet controller 18 to support nested subnets 22, 24 with one or multiple nesting layers.

[0094] The nested subnets 22, 24 may be configured and / or controlled and / or managed directly by the PLMN 12. Alternatively, the PLMN 12 may be adapted to enable or authorize the first subnet 14, specifically the first subnet controller 18, to configured and / or control and / or manage at least one of the nested subnets 22, 24 independently of the PLMN 12. Hence, the sub-subnets 22, 24 to be established may be either visible / non-transparent or transparenl / non-visible from a perspective of the parent net 12.

[0095] A visible / non-transparent sub-subnet can be understood as a sub-subnet whose configuration and / or control and / or management is either performed by theR. 418039

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[0097] parent net 12 itself or for which at least some information, specifically about its existence, is provided to the parent net 12.

[0098] In contrast, a transparenl / non-visible sub-subnet can be understood as subsubnet which is established, configured, controlled, and managed independently of the parent net 12. Particularly, no information about the transparent / non-visible sub-subnet is provided to the parent net 12. The parent subnet 14 is adapted to manage and configure devices inside a transparent nested subnet. Accordingly, this layer of subnetworking is not visible for the parent net 12. In case there are several (nesting) layers of transparent nested subnets, i.e., in case the first subnet comprises several layers of nested subnets, only the respective direct parent subnet (controller) is adapted to allocate resources for the nested subnet(s).

[0099] According to this embodiment, a first sub-subnet 22 is established by the first subnet controller 18 as a transparent / non-visible sub-subnet 22. The first subsubnet 22 is configured by the first subnet controller 18 independently of the parent net 12. The second sub-subnet 24 is established by the first subnet controller 18 as a visible / non-transparent sub-subnet 24. The second sub-subnet 24 is configured by the parent net 12, either directly or via the first subnet controller 18.

[0100] Here, the first sub-subnet 22 comprises a first sub-subnet controller 26. The second sub-subnet 24 comprises a second sub-subnet controller 28. In other words, the first sub-subnet controller 26 is a nested subnet controller 26 of the first nested subnet 22. The second sub-subnet controller 28 is a nested subnet controller 28 of the second nested subnet 24.

[0101] To this end, the node of the parent net 12 is adapted to transmit a sub-subnet establishment information and a sub-subnet enablement information to the first subnet controller 18 of the first subnet 14. The sub-subnet establishment information indicates that a sub-subnet may be established by the first subnet 14, specifically by the first subnet controller 18. The sub-subnet enablement information indicates that a sub-subnet may be configured, by the first subnet 14, specifically by the first subnet controller 18, independently of the parent net 12.R. 418039

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[0103] Accordingly, the first subnet controller 18 is adapted to receive the transmitted sub-subnet establishment information and the transmitted sub-subnet enablement information. The first subnet controller 18 is further adapted to establish the first sub-subnet 22 based on the received sub-subnet establishment information. Moreover, the first subnet controller 18 is adapted to configure the first sub-subnet 22 based on the received sub-subnet enablement information independently of the parent net 12.

[0104] Fig. 2 schematically illustrates methods according to embodiments of the invention.

[0105] Fig. 2A schematically illustrates a method 100 for a parent net independent configuration of a sub-subnet in a wireless communication system according to the first aspect of the invention. Here, the wireless communication system comprises a parent net and a subnet connectable or connected to the parent net. The wireless communication system may be the wireless communication system 10 according to Fig. 1.

[0106] The method 100 comprises a step 110 of receiving, by a subnet control unit of the subnet, a sub-subnet enablement information which indicates that a subsubnet may be configured, by the subnet, independently of the parent net.

[0107] Further, the method 100 comprises a step 120 of, based on the received subsubnet enablement information, configuring the sub-subnet by the subnet control unit.

[0108] The method 100 may be performed by the first subnet control unit 14 of the wireless communication system 10.

[0109] Fig. 2B schematically illustrates a method 200 for transmitting a sub-subnet enablement information in a wireless communication system according to the second aspect of the invention. Here, the wireless communication system comprises a parent net and a subnet connectable or connected to the parent net. The wireless communication system may be the wireless communication system 10 according to Fig. 1.R. 418039

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[0111] The method 200 comprises a step 210 of transmitting, by a node of the parent net, a sub-subnet enablement information to a subnet control unit of the subnet, wherein the sub-subnet enablement information indicates that a sub-subnet may be configured, by the subnet, independently of the parent net.

[0112] The method 200 may be performed by a node of the parent net 12 of the wireless communication system 10.

[0113] Fig. 2C schematically illustrates a method 300 of operating a wireless communication system according to a further aspect of the invention. Here, the wireless communication system comprises a parent net and a subnet connectable or connected to the parent net. The wireless communication system may be the wireless communication system 10 according to Fig. 1.

[0114] The method 300 of operating the communication system 10 comprises the methods 100, 200 according to the first and the second aspect.

[0115] The method 300 comprises a step 310 corresponding to step 210 of the method 200 of transmitting, by a node of the parent net, a sub-subnet enablement information to a subnet control unit of the subnet, wherein the sub-subnet enablement information indicates that a sub-subnet may be configured, by the subnet, independently of the parent net.

[0116] The method 300 comprises a step 320 corresponding to step 110 of the method 100 of receiving, by the subnet control unit, the sub-subnet enablement information.

[0117] The method 300 comprises a step 330 corresponding to step 120 of the method 100 of, based on the received sub-subnet enablement information, configuring the sub-subnet by the subnet control unit.

[0118] The method 300 may be performed by the wireless communication system 10, specifically by the first subnet controller 18 and the node of the parent net 12.

Claims

R. 418039- 15 -Claims1. A method (100) for a parent net (12) independent configuration of a subsubnet (22) in a wireless communication system (10) comprising a parent net (12) and a subnet (14) connectable or connected to the parent net (12), wherein the method (100) comprises:Receiving (110), by a subnet control unit (18) of the subnet (14), a subsubnet enablement information which indicates that a sub-subnet (22) may be configured, by the subnet (14), independently of the parent net (12); andBased on the received sub-subnet enablement information, configuring (120) the sub-subnet (22) by the subnet control unit (18).

2. The method (100) according to claim 1 , further comprising:Receiving, by the subnet control unit (18), a sub-subnet establishment information which indicates that a sub-subnet (22) may be established by the subnet (14); andBased on the received sub-subnet establishment information, establishing, by the subnet control unit (18), the sub-subnet (22) prior to the configuring of the sub-subnet (22).

3. The method (100) according to claim 1 or 2, further comprising:Transmitting, by the subnet control unit, a sub-subnet establishment request and / or a sub-subnet enablement request to a node of the parent net (12) for requesting that a sub-subnet (22) may be established and / or configured by the subnet (14) independently of the parent net (12), wherein the sub-subnet (22) establishment information and / or the subsubnet enablement information is received in response to the respective transmitted request.

4. The method (100) according to one of the preceding claims, wherein configuring the sub-subnet (22) comprises transmitting a sub-subnet configuration information to the sub-subnet (22).R. 418039- 16 -5. The method (100) according to claim 4, wherein the sub-subnet configuration information is contained in an information element of a user equipment, UE, assistance information.

6. The method (100) according to claim 4, wherein the sub-subnet configuration information is contained in a sidelink control information, SCI.

7. The method (100) according to claim 4, wherein the sub-subnet configuration information is transmitted to the sub-subnet (22) using a radio interface different from a cellular interface.

8. The method (100) according to one of the preceding claims, further comprising:Receiving, by the subnet control unit (18), a grant of radio resources for the subnet (14),wherein the granted resources are allocated for one or multiple nodes of the sub-subnet (22), by the subnet control unit (18), independently of the parent net (12).

9. A method (200) for transmitting a sub-subnet enablement information in a wireless communication system (10) comprising a parent net (12) and a subnet (14) connectable or connected to the parent net (12), wherein the method (200) comprises:Transmitting (210), by a node of the parent net (12), a sub-subnet enablement information to a subnet control unit (18) of the subnet (14), wherein the sub-subnet enablement information indicates that a subsubnet (22) may be configured, by the subnet (14), independently of the parent net (12).

10. The method (200) according to claim 9, further comprising:Transmitting, by the node of the parent net (12), a sub-subnet establishment information which indicates that a sub-subnet (22) may be established by the subnet control unit (18).

11. The method (200) according to claim 9 or 10, further comprising:Receiving, by the node of the parent net (12), a sub-subnet establishment request and / or a sub-subnet enablement request from the subnet control unit (18) which comprises a request that a sub-subnet (22) may beR. 418039- 17 -established and / or configured by the subnet (14) independently of the parent net (12),wherein the sub-subnet establishment information and / or the sub-subnet enablement information is transmitted, by the node of the parent net (12), in response to the respective received request.

12. The method(s) (100, 200) according to one of the preceding claims, wherein the sub-subnet enablement information and / or the sub-subnet establishment information is contained in a system information block, SIB, message.

13. The method(s) (100, 200) according to one of the preceding claims, wherein the sub-subnet enablement information and / or the sub-subnet establishment information is contained in a downlink control information, DCI.

14. The method(s) (100, 200) according to one of the preceding claims, wherein the sub-subnet enablement information and / or the sub-subnet establishment information is contained in a radio resource control, RRC, information element.

15. A node of a wireless communication system (10), wherein the wireless communication system (10) comprises a parent net (12) and a subnet (14) connectable or connected to the parent net (12) and the node is adapted to perform the method(s) (100, 200) according to one of claims 1 to 14.

16. Parent net (12) or subnet (14) of a wireless communication system (10), wherein the subnet (14) or of the parent net (12) comprises a node according to claim 15.

17. A wireless communication system (10) comprising a parent net (12) according to claim 16 and a subnet (14) according to claim 16 connectable or connected to the parent net (12).

18. A computer program comprising machine-readable instructions to cause the node according to claim 15 to execute the method(s) (100, 200) according to one of claims 1 to 14, and / orR. 418039- 18 -the subnet (14) according to claim 16 and / or the parent net (12) according to claim 16 to execute the method(s) (100, 200) according to one of claims 1 to 14, and / orthe wireless communication system (10) according to claim 17 to execute the method(s) (100, 200) according to one of claims 1 to 14.

19. A non-transitory computer readable medium having stored thereon the computer program according to claim 18.

20. A data structure, specifically a system information block, SIB, message, or a downlink control information, DCI, or a radio resource control, RRC, information element, for a wireless communication system (10) comprising a parent net (12) and a subnet (14) connectable or connected to the parent net (12), wherein the data structure comprises a data field with a sub-subnet enablement information, which indicates that a sub-subnet (22) may be configured, by the subnet (14), independently of the parent net (12).

21. The data structure according to claim 20, further comprising at least one further data field with a sub-subnet establishment information, which indicates that a sub-subnet (22) may be established by the subnet (14), wherein the sub-subnet establishment information preferably further indicatesa number of nesting layers for nesting multiple sub-subnets (22), and / or a (maximum) number of sub-subnets (22) which may be established by the subnet control unit (18), and / orwhether the sub-subnet(s) (22) comprise a sub-subnet control unit (26), or are controlled by a subnet control unit (18), and / orwhether the sub-subnet(s) (22) may be established temporarily, and / or a maximum duration the sub-subnet(s) (22) may exist.

22. A data carrier signal carrying the computer program of claim 18 or the data structure according to claim 20 or 21.

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