Multi-tag configuration and communication session

Abstract

A network device transmits to a first user equipment (UE) of a set of user equipment an activator configuration for activating target tags across different transmit antenna configurations supported by the first UE. The network device transmits to a second UE of the set respective reader configurations for measuring responses of the target tags activated by the first UE. The network device receives respective measurement reports indicating responses measured by the respective second UEs. The network device generates mapping information indicating configurations of activators and readers for a tag activation session. The network device assigns one or more UEs of the set as activators for respective tags and one or more UEs of the set as readers for respective activated tags. Disclosed embodiments allow for the optimizing the communication with multiple identified tags and in particular the allocation of activator and reader roles to UEs for communicating with the tags. Certain embodiments of the disclosure allow to reduce the number of entities required for repeated parallel communication with multiple identified tags within a given area. Certain embodiments of the disclosure may allow communication with multiple Ambient IoT (AIoT) devices within an area at low latency and low interference.

Description

TECHNOLOGICAL FIELD The present disclosure is related to but not limited to communication networks as defined by the 3 GPP standard, such as the 6G standard. The disclosure particularly relates to the communication with tags, such as with Ambient loT devices, and in particular the configuration of such a communication. BACKGROUND The number of loT connections has been growing rapidly in recent years and is predicted to be hundreds of billions by 2030. With more and more devices expected to be interconnected for improving production efficiency and increasing comforts of life, it demands further reduction of size, cost, and power consumption for loT devices. A critical issue with existing 3 GPP technologies for the target use cases is the capability of energy harvesting considering limited device size. Cellular devices usually consume tens or even hundreds of milliwatts power for transceiver processing. Taking NB-IoT module for example, the typical current consumption for receive processing is about 60mA with supply voltage higher than 3.1V, while 70mA for transmitting processing at OdBm transmit power. Furthermore, the output power provided by typical RF energy harvester is mostly below 1 milliwatt, considering the small size of a few square centimeters for practical devices. Since the available RF power is far less than the consumed power, it is impractical to power cellular devices directly by energy harvesting in most cases. Accordingly, tags in the form of so called Ambient loT devices are used, which utilize a passive radio. The device harnesses energy from wireless signals sent on specific carriers and / or bandwidths and charges a simple circuitry that, once activated, will emit / reflect a signal which encodes at least the ID of the passive radio. The typical system architecture around a passive radio consists of: 1) An activator, i.e. a user equipment or network device that sends an activation signal targeted at waking up the passive radio. 2) The tag with the passive radio, which harnesses energy over a range of frequencies and listens for activation signals. Once such a signal is detected, the passive radio emits / reflects a signal which is specific to the radio ID of the tag. 3) A reader, i.e. a user equipment or network device that listens and detects the passive radio signals. The reader may or may not be collocated with the activator. However, the activator entity must be in proximity of the tag to secure adequate link budget for tag activation. Also, while the reader entity may be located further away from the tag compared to the activator entity, it nevertheless needs to be in the surrounding of the tag. SUMMARY OF SOME EXEMPLARY EMBODIMENTS It may be difficult to optimize the communication with multiple identified tags. More specifically, it may be a challenge to obtain an optimal allocation for the activator and reader roles for the devices. Accordingly, certain embodiments of the disclosure may allow for optimizing the communication with multiple tags and in particular the allocation of activator and reader roles to user equipments for communicating with the tags. Moreover, in case a user equipment acts as an activator only or as a reader only, a configuration of 2X user equipments are required to successfully communicate with X tags. Accordingly, certain embodiments of the disclosure allow to reduce the number of entities required for repeated parallel communication with multiple identified tags within a given area. Certain embodiments of the disclosure may in particular allow communication with multiple Ambient loT devices within an area at low latency and low interference. According to a first exemplary aspect, there is disclosed a first user equipment. The first user equipment may comprise means for receiving an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment. The first user equipment may comprise means for transmitting, based on the activator configuration, activation signals across the different supported transmit antenna configurations of the first user equipment for activating respective target tags. According to a second exemplars aspect, there is disclosed a second user equipment. The second user equipment may comprise means for receiving a reader configuration for measuring responses of activated target tags across different receive antenna configurations supported by the second user equipment. The second user equipment may comprise means for measuring, based on the reader configuration, respective responses of respective activated target tags across the different supported receive antenna configurations of the second user equipment. The second user equipment may further comprise means for transmitting a measurement report indicating respective responses measured by the second user equipment. According to a third exemplary aspect, there is also disclosed a network device. The network device may comprise means for transmitting, to a first user equipment of a set of user equipments, an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment. The netw ork device may comprise means for transmitting, to second user equipments of the set of user equipments, respective reader configurations for measuring responses, across different receive antenna configurations supported by respective ones of the second user equipments, of the target tags activated by the first user equipment. The network device may comprise means for receiving, from the second user equipments, respective measurement reports indicating respective responses measured by the respective second user equipments. The network device may comprise means for generating, based on the received measurement reports, a mapping information indicating configurations of activators and readers for a tag activation session. The network device may comprise means for assigning, based on the generated mapping information, one or more user equipments of the set of user equipments as activators for respective tags and one or more user equipments of the set of user equipments as readers for respective activated tags in a tag activation session. According to a fourth exemplary aspect, there is disclosed a user equipment. The user equipment may comprise means for transmitting full duplex capability7 information indicative of a full duplex support of tire first user equipment. The user equipment may comprise means for receiving, an assignment assigning the user equipment, in a tag activation session, both as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the user equipment. According to a fifth exemplary aspect, there is also disclosed a network device. The network device may comprise means for receiving, from one or more user equipments of a set of user equipments, full duplex capability information indicative of a full duplex support of a respective user equipment. The network device may comprise means for assigning, in a tag activation session, and based on the capability information, one or more user equipments of the set of user equipments both as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the user equipment. According to each of the exemplary aspects, a respective method is also disclosed. Thus, according to the first exemplary aspect, there is disclosed a method performed by a first user equipment. The method may comprise receiving an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment. The method may comprise transmitting, based on the activator configuration, activation signals across the different supported transmit antenna configurations of the first user equipment for activating respective target tags. According to the second exemplary aspect, there is disclosed a method, performed by a second user equipment. The method may comprise receiving a reader configuration for measuring responses of activated target tags across different receive antenna configurations supported by the second user equipment. The method may comprise measuring, based on the reader configuration, respective responses of respective activated target tags across the different supported receive antenna configurations of the second user equipment. The second user equipment may further comprise means for transmitting a measurement report indicating respective responses measured by the second user equipment. According to the third exemplary aspect, there is also disclosed a method, performed by a network device. The method may comprise transmitting, to a first user equipment of a set of user equipments, an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment. The method may comprise transmitting, to second user equipments of the set of user equipments, respective reader configurations for measuring responses, across different receive antenna configurations supported by respective ones of the second user equipments, of tire target tags activated by the first user equipment. The method may comprise receiving, from the second user equipments, respective measurement reports indicating respective responses measured by the respective second user equipments. The method may comprise generating, based on the received measurement reports, a mapping information indicating configurations of activators and readers for a tag activation session. The method may comprise assigning, based on the generated mapping information, one or more user equipments of the set of user equipments as activators for respective tags and one or more user equipments of the set of user equipments as readers for respective activated tags in a tag activation session. According to the fourth exemplary aspect, there is also disclosed a method, performed by a user equipment. The method may comprise transmitting full duplex capability information indicative of a full duplex support of the first user equipment. The method may comprise receiving, an assignment assigning the user equipment, in a tag activation session, both as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the user equipment. According to the fifth exemplary aspect, there is also disclosed a method, performed by a network device. The method may comprise receiving, from one or more user equipments of a set of user equipments, full duplex capability information indicative of a full duplex support of a respective user equipment. The method may comprise assigning, in a tag activation session, and based on the capability information, one or more user equipments of the set of user equipments both as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the user equipment. Furthermore, different sy stems comprising the devices of the disclosed aspects are disclosed, as well. In particular, a system comprising a plurality of tags and one or more of the devices according to the different aspects are disclosed. For instance, a system is disclosed comprising a plurality' of tags, a plurality of user equipments, each being configurable to be a first user equipment according the first aspect and being configurable to be a second user equipment according to the second aspect, and a network device according to the third aspect. For instance, a system is disclosed comprising a plurality of tags, a plurality of user equipments according to tire according to the fourth aspect and a netw ork device according to the fifth aspect. Any of the disclosed devices (user equipment, network device) may generally be a stationary' device or a mobile device. The user equipment may in particular be a terminal device. The user equipment may be a mobile device, such as a smartphone, a tablet, a wearable, smart glasses, a smartwatch, a low power device, an loT device, an IIoT device, a vehicle, a truck, a drone, an airplane, or the like. Accordingly, a network device may in particular be understood to be a wireless communication station installed at a fixed or mobile location and may in particular be or comprise an entity of the radio access network of the communication system. For instance, the network device may be, comprise, or be part of a base station of a communication network of any generation (e.g. a 6gNB, gNB, eNodeB, NodeB, BTS or the like) of the 3 GPP standard. Accordingly, the communication system may in particular be a cellular communication system. In an example of a 5G network, the network device may in particular be or comprise a central unit (CU) and / or a distributed unit (DU), such as a gNB-CU and / or gNB-DU. Generally, the network device may be or comprise a hardware or software component implementing a certain functionality’. In an example, the network device may be an entity' as defined by 3 GPP 5G or NR standard (also referred to as a gNB). Accordingly, while the network device may be understood to be implemented in or be a single device or module, the network node may also be implemented across or comprise multiple devices or modules. Multiple network device of the exemplary aspect may in particular establish a communication system or network, which may in particular be a NR or 5G system (5GS) or part thereof or any other mobile communications system defined by a past or future standard, in particular successors of the present 3GPP standards, such as the 6G standard. A network device of the exemplary’ second aspect may be capable of being in direct and / or indirect communication with the exemplary user equipment of the first aspect. The means or functionality' of any of the disclosed user equipment and network device can be implemented in hardware and / or software. They may comprise one or multiple modules or units providing the respective functionality. They may for instance comprise at least one processor for executing instructions for performing the required functions, and at least one memory storing the instructions. Alternatively, they could comprise for instance circuitry that is designed to implement the required functions, for instance implemented in a chipset or a chip, like an integrated circuit. In general, the means may comprise for instance one or more processing means or processors. Thus, according to the respective exemplary aspects of the present disclosure, there is in each case also disclosed a respective user equipment or network device comprising at least one processor and at least one memory storing instructions that, when executed by the at least one processor, cause the respective apparatus (e.g. the user equipment or the network device) at least to perform a method according to the respective aspect of the present disclosure. Any of the above-disclosed exemplary’ aspects may. however, in general be performed by an apparatus, which may be a module or a component for a device, for example a chip. The disclosed apparatus (e.g. the user equipment or network device) may comprise the disclosed components, for instance means, processor, memory, and may further comprise one or more additional components. According to the exemplary' aspects of the present disclosure, there is in each case also disclosed a computer program, the computer program when executed by a processor of a respective apparatus (e.g. the user equipment or network device) causing an apparatus (e.g. the network device, the user equipment or a part thereof) to perform a method according to the respective aspect. The instructions, for instance processor instructions, may be stored on a storage medium that is readable by a processor, in particular a transitory and / or non-transitory medium. The storage medium could for example be a disk or a memory or the like. The storage medium may be intended for taking part in the operation of a device, like an internal or external memoiy, for instance a Read-Only Memoiy (ROM) or a hard disk, or be intended for distribution of a program or library' including the instructions, like an optical disc. In the following further example embodiments of the different aspects are described. They equally pertain to the different aspects and in particular equally apply to the disclosed devices, methods and systems. It shall be noted that the different aspects may also be combined. For instance, a user equipment with the functionality of the first, second and / or fourth aspect is also disclosed. Likewise, a network device with the functionality of the third and fifth aspect is also disclosed. Furthermore, irrespective of whether referring to a user equipment, a first user equipment or a second user equipment, the disclosure shall equally pertain to any' of the disclosed user equipments. A tag may in particular be a node from a sensor network that is capable of performing a desired action such as gathering, processing and / or communicating information with other connected nodes in a network. The tag may in particular be an ambient loT tag. For instance, the tag may be part of an ecosystem of a large number of objects which are connected into a wireless sensor network using self-powered sensor nodes as tags. The tag may thus in particular be a tag performing energy harvesting. The tag may receive an activation signal and return a response signal based on an identifier (ID) of the tag. For instance, the tag may have limited / or no energy' storage and use the activation signal energy to wake up and modulate the activation signal reflection with its ID, e.g. via on-off keying (switching between full reflection (e.g. bit 1) and matched antenna load (bit 0)). The tag may be in matched antenna load condition as default to enable eneigy harvesting. When the activation signal RF power level at the tag antenna is above a certain threshold, the tag may harvest energy, wake up and start modulating the reflection. As such the activation signal needs to be present for a certain period of time corresponding to the initial tag RF power charge time in addition to the response reflection time and expected propagation delay towards the reader. The tag may continue to harvest RF energy while modulating its response whenever it is in matched condition (bit 0). Thus an activation signal using a specific transmit antenna configuration preferably has a duration accommodating for tag wakeup, response duration and maximum propagation delays and likewise the readers have to be configured for aligned monitor windows. As will be explained in the following, the network may be in charge of the activator and reader configuration and may keep track of the activation configuration used for specific reader reports. Accordingly, a user equipment taking the role of or being assigned as an activator can transmit (e.g. after receiving a corresponding trigger signal from the network) respective activation signals over respective transmit antenna configurations to respective tags. Accordingly, a user equipment taking the role of or being assigned as a reader can receive and detect signals from respective tags (such as backscattered activation signals modulated with a respective tag identifier). As will become apparent from the following description, a specific user equipment can be assigned as or take the role of a reader and / or activator during certain sections of the described approach. More specifically, a specific user equipment can be assigned as or take the role of a reader and / or activator during a first stage (which will also be referred to as a collecting or mapping stage for determining mapping information) and during a second stage (wInch will be referred to as a tag activation session in particular utilizing the determined mapping information). For instance, a user equipment may take the activator role at a certain point in time during the collecting or mapping stage (in which case the user equipment will also be referred to as a first user equipment), while other user equipments may take the reader role (in which case these user equipments will also be referred to as second user equipments). However, at another point in time during the (same) collecting or mapping stage, these roles may change. Furthermore, during a (later) tag activation session, a user equipment may generally be assigned as an activator, a reader or both. Thus, the network device may transmit, to the (single) (first) user equipment of a set of user equipments, an activator configuration for activating target tags across different transmit antenna configurations supported by the (first) user equipment. Accordingly, the (first) user equipment receives this activator configuration. The (first) user equipment may then transmit, based on the activator configuration, activation signals across the different supported transmit antenna configurations of tire (first) user equipment for activating respective target tags. The (first) user equipment may comprise multiple (e.g. two, three, four or more) transmit antennas. A specific transmit antenna configuration may use one or a combination of these antennas, and may correspond to a specific transmit beamforming configuration As the activation signals are transmitted across the supported transmit antenna configurations, this may allow to identify advantageous transmit antenna configurations of the respective user equipment, in case it should be chosen to be an activator (e.g. in a future tag activation session). Correspondingly, the network device will also transmit to (multiple) (second) user equipments of the set of user equipments (e.g. every user equipment of the set of user equipment except the first user equipment), respective reader configurations for measuring responses, across different receive antenna configurations supported by respective ones of the (second) user equipments, of the target tags activated by the first user equipment. A respective (second) user equipment receives this reader configuration. The (second) user equipment may then measure, based on the reader configuration, respective responses of respective activated target tags across the different supported receive antenna configurations of the (second) user equipment. Again, the (second) user equipment may comprise multiple (e.g. two. three, four or more) receive antennas. A specific receive antenna configuration may make use of one or a combination of these antennas, and may correspond to a specific receive beamforming configuration. As the responses of the activated tags are measured across the different supported receive antenna configurations, this may allow to identify advantageous receive antenna configurations of the respective user equipment, in case it should be chosen to be a reader (e.g. in a future tag activation session). The (second) user equipment may then transmit a measurement report (to the network) indicating respective responses measured by the (second) user equipment. A measurement report may e.g. comprise detected tag identifiers and respective associated received signal strengths or reception qualities, possibly associated with respective receive antenna configurations. In an example, the network may transmit and the user equipment may receive a tag configuration comprising identifiers of targets tags. This information may be used by the (second) user equipments, configured as a reader in the collecting or mapping stage, when it may still be unknown, responses of which activated target tags may be received at a particular user equipment using specific receive antenna configurations. Accordingly, the user equipment can use the received identifiers when attempting to decode responses of respective target tags. Accordingly, the network device will receive, from multiple such (second) user equipments configured as readers, respective measurement reports indicating respective responses measured by the respective (second) user equipments. This process (i.e. more specifically said transmitting of an activator configuration, said transmitting of a reader configuration and said receiving of respective measurement reports for further first and respective second user equipments of the set of user equipments) may be repeated, e.g. until sufficiently many or every user equipment of tire set of user equipments lias once been assigned tire role of the first user equipment or activator (e.g. while other or all the other user equipments were assigned as a second user equipment or reader). Accordingly, in an example, said repeating is preferably performed until said transmitting of an activator configuration has been performed for each user equipment of the set of user equipments. The network device may then be able to generate, based on tire received measurement reports, a mapping information indicating configurations of activators and readers for a tag activation session In an example, the measurement report comprises information indicative of identifiers of target tags, from which a response was measured at tire respective user equipment. In an example, the measurement report comprises information indicative of received signal strengths (such as RSSI or RX level) of responses of target tags measured at the user equipment. In an example, the measurement report comprises information indicative of, for a respective receive antenna configuration of the user equipment, identifiers of target tags, from which a response was measured with the respective receive antenna configuration. In an example, the measurement report comprises information indicative of, for a respective receive antenna configuration of the user equipment, signal strengths of responses of target tags measured with the respective receive antenna configuration. Accordingly, a measurement report may indicate, which tag identifiers have been received or measured with which antenna configuration at the respective user equipment with which signal strength or quality. For instance, the mapping information may generally be understood to comprise information of potential activator and reader pairs (including the respective antenna configuration) which may be used in a tag activation session. For instance, the mapping information may comprise information on (e.g. be a map of) activator and reader configurations (including the respectively used antenna configuration) having a tag identifications reading above a certain threshold (e.g. RSSI or RX level). In an example, for a user equipment in the collecting or mapping stage, the activation signals are transmitted sequentially with the different supported transmit antenna configurations of the (first) user equipment. For instance, the different supported transmit antenna configurations are used one after another. For instance, each time a respective activation signal is transmitted a different supported transmit antenna configuration is used (until all configurations have been used, in which case the process may then be repeated). Likewise, for a user equipment in the collecting or mapping stage, the respective responses of respective activated tags are measured sequentially with the different supported receive antenna configurations of the (second) user equipment. For instance, the different supported receive antenna configurations are used one after another. For instance, each time a respective response has been measured or is expected, a different supported receive antenna configuration is used (until all configurations have been used, in which case the process may then be repeated). Thus the sequential transmission (and reception) across the different antenna configurations may be seen as a sequential sweeping of the user equipment over the supported (and reported) receive and transmit antenna configurations attempting tire activation (and reading) of the tags. Since the receive and transmit antenna configurations may have different maximum gain direction, this process may be seen as a kind of separate received and transmit beam sweeping. As will be explained in further detail below, the results may be used for the selection of the best activator and reader pairs for each identified tag in which a given user equipment may support activating or reading of one tag or (in the case of full duplex support) reading of one tag while activating another tag. The above process may be understood as a collecting or mapping stage, which will generate information, e.g. indicating which user equipment is preferably to be used as an activator, reader or both (and with which antenna configuration) in a specific tag activation session, which will be described in more detail below. Thus, it shall be clarified that any user equipment (of the set of user equipments) generally can (and in certain embodiments will) at some point take the role of a first user equipment or activator and of a second user equipment or reader. Also, tire user equipment may later on, in a tag activation session (making use of the results from the collecting or mapping stage), depending on the results of this collecting or mapping stage, be assigned as a reader only, activator only, or both (in case of support for full duplex communication, as discussed below, is supported). In any case, in a later tag activation session, the network device may assign, based on the generated mapping information, one or more user equipments of the set of user equipments as activators for respective tags and one or more user equipments of the set of user equipments as readers for respective activated tags in a tag activation session. Certain user equipments may be assigned as reader only or as activator only (e.g. because they do no support full duplex communication, as will be explained below, and / or because this lias been decided to be used for the specific tag activation session) and certain user equipments may be assigned as both reader and activator (as will be described further below, as well). In particular, certain user equipments may support full duplex communication. Accordingly, a respective user equipment may transmit (and the network device may receive) full duplex capability information indicative of a full duplex support of the (first) user equipment. A user equipment with foil duplex support or supporting full duplex communication is in particular understood to be sub-band non-overlapping full duplex (SBFD) operation. For this, a device or user equipment may comprise a full duplex configuration (FDcon). This may allow simultaneous downlink (DL) and uplink (UL) transmission on different physical resource blocks (RBs) or sub-bands, e.g. within an unpaired wideband (NR) cell. Usually, simultaneous reception and transmission on different frequency bands (with guard band) is referred to as FDD (frequency division duplex), when tire spacing between RX and TX band is high enough to create UL / DL isolation via duplex filtering. However, by full duplex (FD) support, it is in particular referred to a capability allowing transmission and reception at same time and (adjacent) frequency which requires high isolation between the transmitter and receiver. It may not even be required that a guard band (as in FDD operation) is present. This is referred to as sub-band fall duplexing (SBFD) which effectively is UL and DL on adjacent resources with only a very small guard band (no duplex filtering) thus having comparable RX / TX isolation requirements to FD at same time / freq. To support full duplexing operation the self-interference between transmit (TX) and receive (RX) antennas or signals may need to be minimized in order to maintain reception performance while transmitting. Accordingly, the user equipment may only support full duplexing for selected transmit and receive antenna configuration pairs providing for the required isolation (with non-aligned receive and transmit maximum gain directions). Thus, the overall obtainable self-interference rejection gain may be achieved by TX / RX antenna isolation, followed by an analog rejection stage and finally a digital cancellation stage. The antenna TX / RX isolation avoids compression of the receiver analog frontend LN A. For instance, a TX / RX antenna isolation in the range 45-50dB may be achieved for full duplex operation with reasonable RX sensitivity. Generally, the full duplex capability information may inter alia indicate whether or not the respective user equipment supports full duplex communication. However, only in case the full duplex capability information is indicative of a full duplex support of the first user equipment, the network may assign a user equipment as both an activator and a reader in a tag activation session, as described above. Irrespective of an indication of full duplex support, the full duplex capability information may in any case comprise information indicative of one or more of the following. The full duplex capability information may comprise information indicative of transmit antenna configurations supported by the respective user equipment. The full duplex capability information may comprise infonnation indicative of receive antenna configurations supported by the respective user equipment. The full duplex capability' information may comprise information indicative of a number of transmit antenna configurations supported by the respective user equipment. The full duplex capability information may comprise information indicative of a number of receive antenna configurations supported by the respective user equipment. The full duplex capability information may comprise information indicative of combinations of receive antenna configurations and transmit antenna configurations supported by the respective user equipment and allowing full duplex communication. The full duplex capability information may comprise information indicative of a receive and transmit antenna configuration relationship map, indicating combinations of receive and transmit antenna configurations supported by the respective user equipment and allowing full duplex communication. The full duplex capability information may be part of a general user equipment capability report or separate therefrom. In case the user equipment supports full duplex communication, this may allow it to be assigned as both an activator and a reader in a tag activation session (in contrast to the above described collecting or mapping stage, in which a user equipment is typically only assigned as either an activator or a reader). For instance, the network may receive full duplex capability' information indicative of a full duplex support of tire user equipment and thus the user equipment may be assigned as both an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency. The selected transmit antenna configuration and the selected receive antenna configuration allow a full duplex communication, as described above, for the respective user equipment. The respective user equipments and transmit and receive antenna configurations to be used may be chosen and assigned by the network, e.g. based on the mapping information generated in a mapping stage, as described above. However, the user equipment may indicate supported transmit and receive antenna configurations, in particular transmit and receive antenna configurations which support full duplex communication, as will be described in more detail below. While the first and the second frequency may be the same (e.g. because the different transmit and receive antenna configurations already provide a sufficient isolation between the transmit and the receive signals), the first and the second frequency are preferably different.. However, as explained above they do not necessarily need to pertain to different frequency bands observing a guard band. For instance, the first and the second frequency are different frequencies within a common frequency band (sub-band full duplex operation). Nevertheless, it may also be the case that certain (or even all) user equipments may be assigned as either a reader or an activator also in a tag activation session (e.g. because they are legacy user equipments not supporting full duplex communication and / or because this has been decided for the specific tag activation session). More specifically, in the tag activation session, based on the generated mapping information, one or more user equipments from the set of user equipments may be assigned as activators for respective tags at respective selected transmit antenna configurations. Additionally or alternatively, still based on the generated mapping information, one or more user equipments from the set of user equipments may be assigned as readers for respective activated tags at respective selected receive antenna configurations in the tag activation session. Additionally or alternatively, and still based on the generated mapping information, one or more user equipments from the set of user equipments are assigned as activators for respective tags at least in part at different frequencies in the tag activation session. Additionally or alternatively, and still based on the generated mapping information, one or more user equipments from the set of user equipments are assigned as readers for respective activated tags at least in part at different frequencies in the tag activation. For instance, a certain set of different frequencies may be available and the frequencies may be assigned such that tags and / or user equipments close to each other may preferably use different frequencies for the communication. However, the frequencies can be re-used at larger distances. In an example, the selected transmit antenna configuration and the selected receive antenna configuration may allow for full duplex communication of the user equipment by creating a separation between received and transmitted signals in the spatial domain. Accordingly, a (transmit / receive) antenna configuration may in particular be understood to be or referred to as a (transmit / receive) beamforming configuration or a (transmit / receive) spatial filter configuration. In an example, the network may transmit and a respective (first) user equipment (e.g. in the collecting or mapping stage for a respective activator) may receive a trigger message for triggering said transmitting, based on the activator configuration, of the activation signals (across tire different supported transmit antenna configurations). However, also in a tag activation session, the network may transmit to all the user equipments configured as activators a respective trigger signal. However, in the latter case, an activation signal will usually only be transmitted over a specifically selected transmit antenna configuration (based on the mapping information). In an example (e.g. after the network has triggered the respective activators in a specific tag activation session), the user equipments assigned as readers for the specific tag activation session will transmit (and the network device will receive from these user equipments assigned as readers for respective activated tags), respective measurement reports indicating respective responses measured by the respective user equipments in parallel. Due to the generation of the mapping information and the corresponding configuration of the user equipments for the tag activation session based on this mapping information, as described above, all tags to be activated can essentially be activated and read in parallel. A tag activation session may be repeated for tags which require a corresponding (re-)activation. In particular, for further tag reactivation sessions, the assignment of activators and readers may be based on the received full duplex capability information and / or the determined mapping information as long as this information is considered up to date. The following embodiments are also disclosed: 1. A user equipment comprising: means for transmitting full duplex capability information indicative of a full duplex support of the first user equipment; means for receiving, an assignment assigning the user equipment in a tag activation session, both as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein tire selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the user equipment. 2. The user equipment of embodiment 1, wherein tire selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the user equipment by creating a separation between received and transmitted signals in tire spatial domain. 3. The user equipment of embodiment 1 or 2, wherein the first frequency and the second frequency are different frequencies within a frequency band. 4. The user equipment of anyone of embodiments 1-3, wherein the full duplex capability information comprises information further indicative of one or more of: supported transmit antenna configurations; supported receive antenna configurations; a number of supported transmit antenna configurations; a number of supported receive antenna configurations; combinations of supported receive antenna configurations and supported transmit antenna configurations allowing full duplex communication; and / or a receive and transmit antenna configuration relationship map, indicating supported combinations of receive and transmit antenna configurations allowing full duplex communication. 5. The user equipment of anyone of embodiments 1-4 comprising: means for receiving an activator configuration for activating target tags across different transmit antenna configurations supported by the user equipment; and means for transmitting, based on the activator configuration, activation signals across the different supported transmit antenna configurations of the user equipment for activating the respective target tags. 6. The user equipment of embodiment 5. wherein the activation signals are transmitted sequentially with the different supported transmit antenna configurations of the user equipment. 7. The user equipment of embodiment 5 or 6 comprising one or more of: means for receiving a tag configuration comprising identifiers of targets tags; and / or means for receiving a trigger message for triggering said transmitting, based on the activator configuration, of the activation signals. 8. The user equipment of anyone of embodiments 1-7 comprising: means for receiving a reader configuration for measuring responses of activated target tags across different receive antenna configurations supported by the user equipment; means for measuring, based on the reader configuration, respective responses of respective activated target tags across the different supported receive antenna configurations of the user equipment; and means for transmitting a measurement report indicating respective responses measured by the user equipment. 9. The user equipment of embodiment 7, wherein the measurement report comprises information indicative of one or more of: idcnt i fiers of target tags, from which a response was measured at the user equipment; received signal strengths of responses of target tags measured at the user equipment; for a respective receive antenna configuration of the user equipment, identifiers of target tags, from which a response was measured with the respective receive antenna configuration; and / or for a respective receive antenna configuration of the user equipment, signal strengths of responses of target tags measured with the respective receive antenna configuration. 10. The user equipment of embodiment 8 or 9, wherein respective responses of respective activated tags are measured sequentially with the different supported receive antenna configurations of the user equipment. 11. A network device comprising: means for receiving, from one or more user equipments of a set of user equipments, full duplex capability information indicative of a full duplex support of a respective user equipment, means for assigning, in a tag activation session, and based on the full duplex capability information, one or more user equipments of the set of user equipments both as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the user equipment. 12. The network device of embodiment 11 comprising: means for transmitting, to a first user equipment of the set of user equipments, an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment; and means for transmitting, to second user equipments of the set of user equipments, respective reader configurations for measuring responses, across different receive antenna configurations supported by respective ones of the second user equipments, of tire target tags activated by the first user equipment; means for receiving, from the second user equipments, respective measurement reports indicating respective responses measured by the respective second user equipments; means for generating, based on the received respective measurement reports, a mapping information indicating configurations of activators and readers for a tag activation session of the target tags, wherein said assigning of one or more user equipments both as an activator and as a reader is further based on the mapping information. 13. The network device of embodiment 12 comprising: means for repeating said transmitting of an activator configuration, said transmitting of a reader configuration and said receiving of respective measurement reports for further first and respective second user equipments of the set of user equipments. 14. The network device of embodiment 13. wherein said repeating is performed until said transmitting of an activator configuration has been performed for each user equipment of the set of user equipments. 15. The network device of anyone of embodiments 12-14 comprising: means for transmitting, to the first user equipment, a trigger message for triggering a transmitting, based on the activator configuration, of activation signals for activating the target tags across the different supported transmit antenna configurations of the first user equipment. 16. The network device of anyone of embodiments 12-15, wherein, in the tag activation session, based on the generated mapping information, one or more of: one or more user equipments from the set of user equipments are assigned as activators for respective tags at respective selected transmit antenna configurations: one or more user equipments from the set of user equipments are assigned as readers for respective activated tags at respective selected receive antenna configurations; one or more user equipments from the set of user equipments are assigned as activators for respective tags at least in part at different frequencies; and / or one or more user equipments from the set of user equipments are assigned as readers for respective activated tags at least in part at different frequencies. 17. The network device of anyone of embodiments 12-16, comprising means for receiving, in the tag activation session, and from the user equipments assigned as readers for respective activated tags, respective measurement reports indicating respective responses measured by the respective user equipments in parallel. 18. A system comprising: a plurality of tags; a plurality of user equipments according to anyone of embodiments 1-10; and a network device of any one of embodiments 11-17. 19. A method, performed by at least a first user equipment, the method comprising: transmitting full duplex capability information indicative of a full duplex support of the first user equipment; receiving, an assignment assigning the user equipment, in a tag activation session, both as an activator for a tag at a selected transmit antenna configmation and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the user equipment. 20. A method, performed by at least one network device, the method comprising: receiving, from one or more user equipments of a set of user equipments, full duplex capability information indicative of a full duplex support of a respective user equipment, assigning, in a tag activation session, and based on the capability information, one or more user equipments of the set of user equipments both as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configmation and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the user equipment. 21. Computer program code, the computer program code when executed by a processor of an apparatus causing an apparatus to perform a method of embodiment 19 or 20. 22. Computer storage medium comprising computer program code of embodiment 21. Furthermore, the following embodiments are also disclosed: 23. A first user equipment comprising: means for receiving an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment; and means for transmitting, based on the activator configuration, activation signals across the different supported transmit antenna configmations of the first user equipment for activating respective target tags. 24. The first user equipment of embodiment 23. wherein the activation signals are transmitted sequentially with the different supported transmit antenna configurations. 25. The first user equipment of embodiment 23 or 24 comprising: means for receiving a trigger message for triggering said transmitting, based on the activator configuration, of the activation signals. 26. The first user equipment of anyone of embodiments 23-25 comprising: means for receiving, in a tag activation session, an assignment assigning the first user equipment as one or more of: an activator for a tag at a selected transmit antenna configuration and at a frequency; both as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the first user equipment. 27. The first user equipment of anyone of embodiments 23-26 comprising: means for transmitting full duplex capability information of the first user equipment, wherein the full duplex capability information comprises information indicative of one or more of: whether or not the first user equipment supports full duplex communication; supported transmit antenna configurations; supported receive antenna configurations; a number of supported transmit antenna configurations; a number of supported receive antenna configurations; combinations of supported receive antenna configurations and supported transmit antenna configurations allowing full duplex communication; and / or a receive and transmit antenna configuration relationship map, indicating supported combinations of receive and transmit antenna configurations allowing full duplex communication. 28. A second user equipment comprising: means for receiving a reader configuration for measuring responses of activated target tags across different receive antenna configurations supported by the second user equipment; means for measuring, based on the reader configuration, respective responses of respective activated target tags across the different supported receive antenna configurations of the second user equipment; and means for transmitting a measurement report indicating respective responses measured by the second user equipment. 29. The first user equipment of embodiment 28 comprising: means for receiving a tag configuration comprising identifiers of targets tags. 30. The second user equipment of embodiment 28 or 29, wherein the measurement report comprises information indicative of one or more of: identifiers of target tags, from which a response was measured at the second user equipment; received signal strengths of responses of target tags measured at the second user equipment; for a respective receive anteima configuration of the second user equipment, identifiers of target tags, from which a response was measured with the respective receive antenna configuration; and / or for a respective receive antenna configuration of the second user equipment, signal strengths of responses of target tags measured with the respective receive antenna configuration. 31. The second user equipment of anyone of embodiments 28-30. wherein respective responses of respective activated tags are measured sequentially with the different supported receive antenna configurations of the second user equipment. 32. The second user equipment of anyone of embodiments 28-31 comprising: means for receiving, in a tag activation session, an assigmnent assigning the second user equipment as one or more of: a reader for an activated tag at a selected receive antenna configuration and at a frequency; and / or both as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the second user equipment. 33. The second user equipment of anyone of embodiments 28-32 comprising: means for transmitting full duplex capability information of the second user equipment, wherein the full duplex capability information comprises information indicative of one or more of: whether or not the second user equipment supports full duplex communication; supported transmit anteima configurations; supported receive antenna configurations; a number of supported transmit antenna configurations; a number of supported receive antenna configurations; combinations of supported receive antenna configurations and supported transmit antenna configurations allowing full duplex communication; and / or a receive and transmit antenna configuration relationship map, indicating supported combinations of receive and transmit antenna configurations allowing full duplex communication. 34. A network device comprising: means for transmitting, to a first user equipment of a set of user equipments, an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment; and means for transmitting, to second user equipments of the set of user equipments, respective reader configurations for measuring responses, across different receive antenna configurations supported by respective ones of the second user equipments, of the target tags activated by the first user equipment; means for receiving, from the second user equipments, respective measurement reports indicating respective responses measured by the respective second user equipments; means for generating, based on the received measurement reports, a mapping information indicating configurations of activators and readers for a tag activation session, means for assigning, based on the generated mapping information, one or more user equipments of the set of user equipments as activators for respective tags and one or more user equipments of the set of user equipments as readers for respective activated tags in a tag activation session. 35. The network device of embodiment 34 comprising: means for repeating said transmitting of an activator configuration, said transmitting of a reader configuration and said receiving of respective measurement reports for further first and respective second user equipments of the set of user equipments. 36. The network device of embodiment 35, wherein said repeating is performed until said transmitting of an activator configuration has been performed for each user equipment of the set of user equipments. 37. The network device of anyone of embodiments 34-36 comprising: means for receiving, from the first and / or second user equipments, full duplex capability information of the respective user equipment, wherein said assigning of one or more user equipments as activators and one or more user equipments as readers for a tag activation session is further based on the received full duplex capability information, wherein the capability full duplex information comprises information indicative of one or more of: whether or not the respective user equipment supports full duplex communication; transmit antenna configurations supported by the respective user equipment; receive antenna configurations supported by the respective user equipment; a number of transmit antenna configurations supported by the respective user equipment; a number of receive antenna configurations supported by the respective user equipment; combinations of receive antenna configurations and transmit antenna configurations supported by the respective user equipment and allowing full duplex communication; and / or a receive and transmit antenna configuration relationship map, indicating combinations of receive and transmit antenna configurations supported by the respective user equipment and allowing full duplex communication. 38. The network device of anyone of embodiments 34-37 comprising: means for transmitting, to the first user equipment, a trigger message for triggering a transmitting, based on the activator configuration, of activation signals for activating target tags across the transmit antenna configurations supported by the first user equipment. 39. The network device of anyone of embodiments 34-38, wherein, in the tag activation session based on the generated mapping information, one or more of: one or more user equipments from the set of user equipments are assigned as activators for respective tags at respective selected transmit antenna configurations; one or more user equipments from the set of user equipments are assigned as readers for respective activated tags at respective selected transmit antenna configurations; one or more user equipments from the set of user equipments are assigned as activators for respective tags at least in part at different frequencies; multiple user equipments from the set of user equipments are assigned as readers for respective activated tags at least in part at different frequencies; at least one user equipment from the set of user equipments is assigned both as an activator for a tag at a respective selected transmit antenna configuration and a respective frequency and as a reader for another activated tag at a respective selected receive antenna configuration and a respective frequency, wherein the respective selected transmit antenna configuration and the respective selected receive antenna configuration allow full duplex communication for the at least one user equipment. 40. The network device of anyone of embodiments 34-39, comprising: means for receiving, in the tag activation session, form the user equipments assigned as readers for respective activated tags, respective measurement reports indicating respective responses measured by the respective user equipments in parallel. 41. A system comprising: a plurality of tags; a plurality of user equipments, each being configurable to be a first user equipment according to anyone of embodiments 23-27 and being configurable to be a second user equipment according to anyone of embodiments 28-33; and a network device of any one of embodiments 34-40. 42. A method, performed by at least a first user equipment, the method comprising: receiving an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment; and transmitting, based on the activator configuration, activation signals across the different supported transmit antenna configurations of the first user equipment for activating respective target tags. 43. A method, performed by at least a second user equipment, the method comprising: receiving a reader configuration for measuring responses of activated target tags across different receive antenna configurations supported by the second user equipment; measuring, based on the reader configuration, respective responses of respective activated target tags across tire different supported receive antenna configurations of the second user equipment; and transmitting a measurement report indicating respective responses measured by the second user equipment. 44. A method, performed by at least one network device, the method comprising: transmitting, to a first user equipment of a set of user equipments, an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment; and transmitting, to second user equipments of the set of user equipments, respective reader configurations for measuring responses, across different receive antenna configurations supported by respective ones of the second user equipments, of the target tags activated by the first user equipment; receiving, from the second user equipments, respective measurement reports indicating respective responses measured by the respective second user equipments; generating, based on the received measurement reports, a mapping information indicating configurations of activators and readers for a tag activation session, assigning, based on the generated mapping information, one or more user equipments of the set of user equipments as activators for respective tags and one or more user equipments of the set of user equipments as readers for respective activated tags in a tag activation session. 45. Computer program code, the computer program code when executed by a processor of an apparatus causing an apparatus to perform a method of anyone of embodiments 42-44. 46. Computer storage medium comprising computer program code of embodiment 45. It is to be understood that the presentation of the embodiments disclosed herein is merely by way of examples and non-limiting. Herein, the disclosure of a method step shall also be considered as a disclosure of means for performing the respective method step. Likewise, the disclosure of means for performing a method step shall also be considered as a disclosure of the method step itself. Other features of the present disclosure will become apparent from the following detailed description considered in conjunction with the accompanying drawings. It is to be understood, however, that the drawings are designed solely for purposes of illustration and not as a definition of the limits of the present disclosure, for which reference should be made to the appended claims. It should be further understood that the drawings are not drawn to scale and that they are merely intended to conceptually illustrate the structures and procedures described herein. BRIEF DESCRIPTION OF THE FIGURES Fig. 1 shows a schematic diagram illustrating an example radio environment in which exemplary embodiments of the present disclosure may be performed; Fig. 2a,b,c show different frequency resource partitioning schemes to illustrate sub-band nonoverlapping full duplex communication; Fig. 3a,b show an example system illustrating example aspects of the disclosure; Fig. 4a,b show further example systems illustrating example aspects of the disclosure; Fig. 5 shows an example message sequence chart illustrating an example embodiment of the different aspects of the disclosure; Fig. 6 shows a block diagram of an example embodiment of a terminal device; Fig. 7 shows a block diagram of an example embodiment of a network node; and Fig. 8 shows a schematic illustration of examples of tangible and non-transitory computer-readable storage media. DETAILED DESCRIPTION OF THE FIGURES The following description serves to deepen the understanding of the present disclosure and shall be understood to complement and be read together with the description of example embodiments of the present disclosure as provided in the above SUMMARY section of this specification. In connection with Fig. 1, an example communication system, in which the present disclosure may be applied, is first described. While the specific radio system in the examples below is a 5G system, this is only to be considered a non-limiting example, and the invention may likewise be employed in past or future generation mobile communication systems or communication systems from a different standard development organization. The disclosure is in particular also applicable to 6G or future generation networks. Thus, the term gNB as used in the following shall be understood to also cover future base stations, such as a 6gNB. Fig. 1 shows a 5G communication network 100, which employs the New Radio (NR) technology and also an architecture for which the different sublayers of the RAN may be split into two logical entities in a communication network control element (like gNB), which are referred to as distributed unit (DU, as an example of a network node according to the present disclosure) and central unit (CU, as a further example of a network node according to the present disclosure). For example, the CU is a logical node that controls the operation of one or more DUs over a front-haul interface (referred to as Fl interface). The DU is a logical node including a subset of the gNB functions, depending on the functional split option. For instance, the layer 1 and layer 2 protocols may be implemented in the DU, while the layer 3 protocols may be implemented in the CU. As shown in Fig. I. a first user equipment (UE) 110, as an example of user equipments of the cxcmplan aspects of tire present disclosure, is connected to a cell 1 of a network node or base station, a gNB 120 via a communication beam of the cell 1. In the example shown in Fig. 1, the gNB 120 is provided with a CU 123 and two DUs 121 and 122 being connected to the CU 123 by a Fl interface. Cell 1 may be considered to be a serving cell or source cell for the user equipment 110. Furthermore, as shown in the example of Fig. 1, there is a plurality of further cells to which the first user equipment 110 can connect. Similarly to cell 1, cells 2 and 3 are controlled by gNBs 125 and 126, respectively. Each gNB may provide one or more cells, and may further provide a plurality’ of beams within each cell for coverage enhancement. As shown in Fig. 1, each base station or gNB is connected to a core network 130. such as a 5GC, via respective interfaces, indicated as NG interfaces. Furthermore, each gNB is connected with each other by means of a specific interface, which is referred to e.g. as an Xn interface. Any of these network entities, such as the gNB, gNB-DU, gNB-CU and / or 5GC, may individually or together be an example of a network node according to the present disclosure. A system according to the present disclosure may in particular comprise multiple user equipments (such as user equipments illustrated in Fig. 1) and additionally a plurality of tags (as illustrated in Fig. 3 and 4). As already explained, the tags may in particular be Ambient loT tags comprising or being designed as a passive radio obtain the required energy mainly or exclusively from energy harvesting radio signals. More specifically, such a passive radio is a device that harnesses energy from wireless signals sent on specific carriers and / or bandwidths and charges a simple circuitry that, once activated, will emit / reflect a signal which encodes at least the ID of the passive radio. The typical system architecture around a passive radio consists of: 1. An activator: a device that sends an activation signal targeted at waking up tire passive radio. 2. The passive radio: harnesses energy over a range of frequencies and listens for activation signals. Once such a signal is detected, the passive radio emits / reflects a signal which is specific to that radio ID. 3. A reader: a device that listens and detects the passive radio signals. The reader may or may not be collocated with the activator. Generally different topologies may be employed for communicating with such tags. However, in any case, the Ambient loT device may be provided with a carrier wave from other node(s) either inside or outside the topology. The links in each topology may either be bidirectional or unidirectional. The tag may for instance communicate with one ore multiple user equipments, assisting nodes, or intermediate nodes. Certain topologies may require or profit from the user equipment supporting full duplex communication if it operates in a mono-static mode and transmit the activation signal at the same time it is listening for the A-IoT tag backscattered response (as will be described in more detail below). In an example topology' (also referred to as “Topology' 2”), the Ambient loT device communicates bidirectionally with an intermediate node between the device and base station. In this topology, the intermediate node can be a relay, IAB node, user equipment, repeater, etc. The intermediate node transfers the information between the base station and the Ambient loT device. In another example topology (also referred to as “Topology 4”), the Ambient loT device communicates bidirectionally with a user equipment. The communication between user equipment and the ambient loT device includes Ambient loT data and / or signaling. Figs. 2a,b,c now show different frequency resource partitioning schemes, namely traditional FDD and TDD compared to frequency-time resource partitioning sub-band non-overlapping full duplex communication (SBFD). Fig. 2a shows a diagram 210 illustrating FDD for paired bands, and Fig. 2b shows a diagram 220 illustrating TDD for unpaired bands. In TDD, the time domain resource is split betw een downlink and uplink. Allocation of a limited time duration for the uplink in TDD would however result in reduced coverage, increased latency, and reduced capacity. To address these challenges, simultaneous DL and UL transmission can be allowed on different physical resource blocks (RBs) / or sub-bands within an unpaired wideband NR cell, as illustrated in the diagram 230 Figure 2c. In the present disclosure, it is referred to this scheme as sub-band non-overlapping full duplex (SBFD). While the default assumption in 3GPP is that, for Rel-19, the base station (gNB) will support full-duplex operation, i.e.. can transmit (in DL) and receive (in UL) simultaneously in separate resource blocks (RBs) of tire NR carrier, while the user equipment remains half-duplex, i.e. can either transmit or receive at a certain time. While Rel-19 may still only provide SBFD capability for the gNB with user equipments remaining half duplex capable, it is expected that the user equipment full duplex may come with Rel-20. In any case, to support full duplexing operation the self-interference between the TX and RX antennas or signals needs to be minimized in order to maintain reception performance while transmitting. The overall obtainable self-interference rejection gain is achieved by TX / RX antenna isolation followed by an analog rejection stage and finally a digital cancellation stage. The antenna TX / RX isolation is required to avoid compression of the receiver analog frontend LNA. Prototype experiments show that a TX / RX antenna isolation in the range 45-50dB is required for fnl 1 duplex operation with reasonable RX sensitivity'. For instance, a sub-6GHz prototype implemented overall SIC rejection was found adequate for meeting the LTE20 RX sensitivity requirement at lOdB receiver noise figure (RX NF), TX @23dBm with 45-50dB UL / DL antenna isolation. In the following a communication with multiple Ambient loT devices will be described within an area at low latency and low interference utilizing multiple activator and / or reader antenna configurations, which may include activator-reader user equipments with simultaneous Ambient loT device activation and reading capability. Fig. 3a,b show an example system 300, in which certain aspects of tire present disclosure may be employed illustrating example aspects of the disclosure, in particular an example configuration of reader / activators and tags in a tag activation session. The system comprises a base station “gNB^l”, multiple tags '’Tag r. “Tag_2”, “Tag_3”, Uag4L “Tag^5” and multiple user equipments “UEJ”, "T-E / T “UE_3” GJE 4T “UE_5”, “UE_6‘’, “UE_7” “UE_8”, “UE_9”. In Fig. 3a, the placement of the user equipments, the five Tags and ten potential activators / readers is shown, while in Fig. 3b a parallel bi-static multi-tag configuration for communication is illustrated. In this case the user equipments may not support full duplex communication, but may only be half duplex capable (e.g. TDD capable). The multiple tags (Ambient loT devices) are in this case located within a 3GPP TDD cell. For tag discovery and subsequent tag communication at least one activator and one reader are required for activating or illuminating the tag and for then receiving the tag response signal. The activator entity must be in proximity of the tag to secure adequate link budget for tag activation. The reader entity may be located further away from the tag compared to the activator entity. While each tag could be addressed one at a time, such sequential approach is veiy time consuming. Parallel multi-tag communications can significandy reduce latency, but it conies with some limitations: The tags may be simple backscatter type devices which do not support frequency or time shift of the response signal compared to the activation signal. Legacy 3 GPP NR user equipments are half-duplex and may either be configured as activator or reader but cannot support a parallel transmit and receive for full duplex communication. The reader may pick up activation signals for other tags if transmitted at same frequency. Taking these limitations into account a parallel tag communication configuration is depicted in Figure 3b. In this scenario the entity closest to each tag is configured as activator for that tag (see respective pairs of user equipment and tag encircled with a solid line in Fig. 3b) while another entity is configured as reader for that tag (see respective pairs of user equipment and tag encircled with a dashed line in Fig. 3b). To minimize interference, each tag communication session is configured for using activation signals at different frequencies, referred to fl to fS. The configuration may be summarized in the following table 1: Tag 1 2 3 4 5 Activator UE J UE J UE_4 UEj5 UE_7 Frequency fl f2 f3 f4 f5 Reader UE J gNBl UE_5 UE_9 UES Frequency fl f2 f3 f4 f5 Busy Readers UE_3 UE_4 gNBl UE_2 UE_6 UE_1 UE_2 UE_3 gNBl UE_3 UE_8 gNBl UE_5 UE_4 gNB_l In the above table 1. the busy readers refer to other entities in proximity of a given tag which could generally be used as a reader for that tag, but are in tins case already assigned as either activator or reader for another tag. Thus, due to the half-duplex nature of the activator / reader entities involved, a configuration of up to 2*X entities are required to successfully communicate in parallel with X Tags. Irrespective of whether the user equipments support full duplex communication, the procedures described herein are also advantageous for determining an optimal configuration, e.g. as the one shown in Fig. 3b, as this configuration may not only depend on the specific locations but also on the orientation and supported antenna configuration of the user equipments, for instance. Nevertheless, it would be advantageous to not only determine an optimal configuration regarding the distribution of the activator and reader roles and the anteima configurations to use, but to additionally reduce the number of (3 GPP NR) entities (such as user equipment, gNB, PRU. RSU,...) required for low latency parallel multi-tag communication sessions. Such further optimized configurations will be illustrated in Fig. 4a,b, while the procedure for obtaining and using the configuration will be explained in more detail with reference to Fig. 5. With reference to Fig. 4a,b further example systems 410, 420 illustrating further example configurations of activators, readers and tags in a tag activation session are shown. In particular, the systems 410, 420 and corresponding configurations show n in Fig. 4a.b make use of user equipments being capable of full duplex communication (SBFD) so that these user equipments are capable of simultaneous transmission and reception within the same frequency band in order to reduce the number of entities required for repeated parallel communication with multiple identified tags within a given area. Such a configuration may herein also be referred to a full duplex configuration (FDcon). The number of user equipments being capable of full duplex communication is different for Fig. 4a and Fig 4b. A user equipment being capable of a full duplex communication (Fdcon) may in particular fulfil the following features: The user equipment has multiple (e.g. 2, 3,4 or more) antennas capable of receiving and transmitting activation signals and receiving responses from tags, respectively. The user equipment supports simultaneous reception and transmission but at adjacent frequencies with spacing significantly less than the usual FDD duplex distance. However, only certain combinations of the receive and transmit antenna configurations may uphold the required antenna isolation for supporting simultaneous transmission and reception. The maximum gain direction for the receive and transmit antennas may not align and may depend on the used configuration. More specifically, a user equipment with Fdcon capability may be configured, in a tag activation session, as activator for one tag while being assigned as reader for another tag. Assuming that all user equipments with Fdcon capability are within activation distance of at least one tag, this may reduce the number of entities required for communicating with X tags from 2*X to X if X user equipments support this capability. Such a system 410 (all user equipments support SBFD) and resulting configuration is exemplarily depicted in Figure 4a, illustrating a reduction of required entities from ten (as was required in Fig. 3b for instance) to only five entities (namely user equipments UE2. UE3. UE 4. U EG. UE7). Each of the user equipments acts as an activator for a specific tag (see respective pairs of user equipment and tag encircled in a solid line in Fig. 4a) and simultaneously as a reader for another tag (see respective pairs of user equipment and tag encircled in a dashed line in Fig. 4a). The spatial direction (e.g. direction with highest gain) of the employed transmit antenna configuration (solid arrow next to a respective user equipment) and the spatial direction of the employed receive antenna configuration (dashed arrow next to a respective user equipment) are also shown in Fig. 4a. The system is configured such that the user equipments are using different frequencies in their respective activator roles, so that a user equipment transmits a respective activator signal at a first frequency and receives a respective response from the tag to be read at a different second frequency. This configuration may be summarized in the following table 2: Tag 1 2 3 4 5 Activator UE J UE3 UE_4 UE6 UE_7 Frequency fl f2 f3 f4 f5 Reader UE_4 UE J UE_7 UE J UE6 Frequency fl f2 f3 f4 f5 The frequencies used by the user equipments for activating and reading can thus be summarized in the following table 3: Activating Reading UE_2 fl f2 (JI-J f2 f4 UE_4 f3 fl UE_6 f4 f5 UE_7 f5 f3 In Fig. 4b a system 420 is illustrated, in which, as another example, not all (in this case only two) user equipments are capable of full duplex communication (FDcon) for receiving and transmitting simultaneously, namely user equipments U E3 and UE4. Nevertheless, even if only a subset of user equipments support Fdcon, this may still reduce the number of entities required for communicating with X tags from 2*X to a value between 2*X and X, in this case a reduction of required entities from ten (as was required in Fig. 3b for instance) to eight entities. The spatial direction of the employed transmit antenna configuration (solid arrow next to a respective user equipment) and the spatial direction of the employed receive antenna configuration (dashed arrow next to a respective user equipment) are again shown in Fig. 4b. This configuration may be summarized in the following table 4: Tag 1 2 3 4 5 Activator UE_2 UE_3 UE_4 UE_6 UE_7 Frequency fl f2 f3 f4 f5 Reader UE_4 gNB_l UE_5 UE_3 UE_8 Frequency fl f2 f3 f4 f5 The frequencies used by the user equipments for activating and reading can thus be summarized in the following table 5: Activating Reading UE_2 fl UE_3 f2 f4 UE_4 13 fl UE Ji f3 UEJ5 f4 UE_7 f5 UE_8 f5 gNB_l f2 As will be explained in more detail with respect to the sequence diagram of Fig. 5, the approach suggested herein may make use of the user equipments performing a capability reporting full duplex capability information e.g. detailing their FDcon support, the number of supported receive and transmit antenna configurations and / or the dependencies of respective receive and transmit antenna configurations for maintaining adequate Fdcon isolation. Furthermore, as will also be explained in more detail below, the approach allows an enhanced sequential multi-tag activation and reading procedure creating a link budget and a mapping information (e.g. a capability map) of suitable activators and readers for each tag (also referred to as collecting or mapping stage herein). The created mapping information can then be used for configuration of a parallel multi-tag communication session (also simply referred to as a tag activation session herein) with a minimum number of activators and / or readers involved and optionally with activators transmitting at different frequencies for interference mitigation. Such an approach has the advantage of tag communications with reduced latency and supporting functions overhead accomplished via parallel activation and reading of multiple tags in an area with a minimum number of supporting entities involved as activators and readers. Even for (legacy ) user equipments without full duplex communication support the procedure enables initial tag identification discovery and a down selection of an optimum set of entities involved with optimum antenna configurations for a multi-tag communication session for re-activating a set of tags which require re-activation (tag activation session). Fig. 5 shows an example message sequence chan 500 with an example embodiment illustrating different aspects of tire disclosure. The proposed multi-tag communication procedure can generally be divided into a capability reporting stage (block 500A, comprising actions 501, 502), a collecting and mapping stage (block 500B, map generation, comprising actions 503-509), and a tag activation session (block 500C, parallel multi-tag communication session, comprising steps 510-514). The procedure shown in Fig. 5 assumes that the network device (in the present non-limiting example a Session Control Unit (SCU)) has selected a superset of Y user equipments expected to be in proximity of the target tags. The user equipments may either be configured and referred to as activator, reader or both, depending on the situation. Considering first the user equipment capability reporting actions 501, 502 in block 500A. The SCU may request (action 501) a full duplex capability information (Fdcon support reporting) from the selected superset of potential user equipment activators / readers. However, alternatively, the user equipments may also report this information unsolicited or as is part of general UE capability reporting. In either case, the user equipments may then report (action 502) respective full duplex capability information (Fdcon support) to tire SCU. The user equipments are shown as activators / readers in Fig. 5. This full duplex capability information or reporting may include an indication whether or not the user equipment supports full (SBFD) duplex communication (Fdcon support). The full duplex capability information may indicate the number of TX antenna configurations (TX#). Legacy user equipments without support of full duplex communication may nevertheless support transmission on multiple antennas with different radiation patterns and may also indicate the number of supported transmit antennas and / or transmit antenna configurations. The full duplex capability information may indicate the number of RX antenna configurations (RX#). Again, legacy user equipments without support of full duplex communication may nevertheless support reception on multiple antennas with different radiation patterns and may also indicate the number of supported receive antennas and / or receive antenna configurations. While legacy user equipments may include more physical antennas than RX chains which will increase the number of RX antenna configurations RX#, most commonly a user equipment will have the same number of antennas and RX chains. Moreover, the full duplex capability information may indicate an RX / TX antenna configurations relationship map, indicating which combination of RX and TX antennas / antenna configurations can maintain a sufficiently high RX / TX antenna isolation (to allow for full duplex communication). The information of an exemplary RX / TX antenna configurations relationship map may be as indicated in tire following table 6: RX# configuration index TX# configuration index RX#_idxl TX#_idx{ 1,2,3} RX#_idx2 TX#_idx{4,5,6} RX#_idx{RX#} TX#_idx{TX#-2, TX#-1, TX#} For instance, the user equipment may support full duplex communication utilizing a combination of the receive antenna configuration with index 1 with the transmit antenna configuration with indices 1, 2 or 3 or a combination of the receive antenna configuration with index 2 with the transmit antenna configuration with indices 4, 5 or 6, etc. The actual antennas used for a specific configuration may not be known to the network, as it is usually only of interest how many antenna configurations are supported and which antenna configuration allows full duplex support. Considering now the collecting or mapping stage with a sequential activation and reading of the tags in block 500B, actions 503-509. The SCU configures (action 503) all Y user equipments with the ID of all target tags. The SCU then transmits an activator configuration (action 504) assigning a single user equipment (also referred to as a first user equipment) as an activator (e.g. at a frequency fl) for sequential repeated transmission of activation signals across all supported sequential TX antenna configurations (TX#). The SCU further transmits reader configurations (action 505) assigning the remaining Y-l user equipments (also referred to as second user equipments) as readers (at the frequency fl) for sequential repeated reading across all simultaneously supported RX antenna configurations (RX#). The SCU may then transmit a trigger activation message (action 506) for initiating the transmission of activation signals by the user equipment assigned as activator (action 506-1), and tags in the proximity’ of the activator will wake up and respond (action 506-2). The user equipments assigned as readers report measurement results to the SCU for each receive antenna configuration RX#, which reporting may e.g. including the detected tag IDs and the associated RX level or quality (action 507). The activation signals are repeatedly transmitted for a sufficiently long period of time to allow the readers to sweep across their different receive antenna configurations and identify one or more suitable receive antenna configurations for reading a tag- Actions 505 - 507 may then be repeated (action 508) e.g. until all user equipments of the set of Y user equipments have once been assigned as activator (with the remaining user equipments being assigned readers). However, it may also be conceivable that sufficient information is available with a lower number of repetitions (i.e. before each and every user equipment has been assigned an activator). The collecting or mapping stage (block 500B) may only be performed for a single frequency fl, as it can be expected that the same result will be received for different frequencies f2-fx. However, alternatively the collecting or mapping stage may also employ different frequencies. In any case, based on tire received user equipment capability reportings (action 502) and based on the tag measurement reports received in (repeated) action 507, the SCU may generate (action 509) mapping information with indicating possible activator / reader configurations. The mapping information may indicate possible activator / reader configurations with tag detection readings above a certain RX Icvcl / qualitv threshold. The mapping information may in particular indicate, for each target tag, which user equipments may be used as a reader and / or activator for a respective tag and with which receive and / or transmit antenna configuration. Considering now the tag activation session in block 500C, actions 510-514. As the tag are all activated and read in parallel the session can also be referred to a parallel multi-tag communication session. The SCU may determine that a certain number of tags (X) need to be re-activated. The tags determined to require a (re-)activation may be all or a subset of the target tags used in collecting or mapping stage 500B. The SCU may then use the mapping information generated in action 509 together with the full duplex capability information received in action 502 to identify a multi-Acti\-ator / Reader constellation. The identified constellation may be optimized with respect to one or more aspects, in particular with respect to minimizing the number of entities involved for a parallel X tag communication session (under the constraint each tag determined to be re-activated can be activated), and / or minimizing the interferences. The SCU then configures (action 511), according to the mapping information obtained in action 509, the activators at selected transmit antenna configuration (selected TX#_idx) and at selected transmit frequency f ix and the readers at selected receive antenna configuration (selected RX# Jdx) and at selected frequency fix. To avoid interference, each (or at least some) activator frequencies f_tx may different (fl, f2, ..., fx). Also, for FDcon capable user equipments, they may act as both an activator and reader in a tag activation session. However, in this case it is preferred that a user equipment acts as an activator and a reader for two different tags and at two different frequencies so that f_tx is different from f_rx for this user equipment. The SCU may then transmit trigger messages and initiate (action 512) all activators in parallel. The activators will transmit respective activation signals (action 512-1) at configured or selected frequencies and transmit antenna configurations. The tags will wake up and transmit or backscatter (action 512-2) respective response. The user equipments configured as readers measure in parallel the responses at configured or selected frequencies and receive antenna configurations and report the measurement results (action 513) to the SCU. The measurement report may indicate for selected receive antenna configurations (RX#_idx) detected tag IDs and the associated RX level or quality. For subsequent tag (re-)activation sessions actions 510 to 513 may be repeated, at least as long as the mapping information generated in action 509 is considered still valid. This will usually be the case for static / semi-static conditions. It is again noted that even though the above procedure allows and assume that certain user equipments support full duplex communication (SBFD) and can thus be configured as activator and reader in a tag activation session (block 500C), the described procedure is nevertheless also applicable for a set of legacy user equipments only. For instance, considering a scenario, in which all user equipments in the set are legacy user equipments with multiple antennas and thus have multiple receive and transmit antenna (RX#, TX#) configurations, but no FDcon capability. In this scenario the benefit of the procedure is the enablement of initial tags identification discovery and down selection of the optimum set of entities involved with optimum antenna configurations for re-activated multi-tag communication sessions. Turning now to Fig. 6, there is shown a block diagram of an exemplary embodiment of a user equipment 600 according to the present disclosure. For example, user equipment 600 may be one of a smartphone, a tablet computer, a notebook computer, a smart watch, a smart band, an LPWAN device, an loT device, a sensor node, an eMTC device or a vehicle or a part thereof. User equipment 600 comprises a processor 601. Processor 601 may represent a single processor or two or more processors, which are for instance at least partially coupled, for instance via a bus. Processor 601 executes a program code stored in program memory 602 (for instance program code causing user equipment 600 in connection with a network device or base station) to perform one or more of the embodiments of a method according to the present disclosure or parts thereof, when executed on processor 601, and interfaces with a main memoiy 603. Program me mon 602 may also contain an operating system for processor 601. Some or all of memories 602 and 603 may also be included into processor 601. One of or both of a main memory and a program memory of a processor (e.g. program memory 602 and main memory 603) could be fixedly connected to the processor (e.g. processor 601) or at least partially removable from the processor, for instance in the form of a memoiy card or stick. A program memoiy (e.g. program memoiy 602) may for instance be a non-volatile memoiy. It may for instance be a FLASH memory (or a part thereoi), any of a ROM, PROM, EPROM, MRAM or a FeRAM (or a part thereof) or a hard disc (or a part thereof), to name but a few examples. For example, a program memoiy may for instance comprise a first memory section that is fixedly installed, and a second memoiy section that is removable from, for instance in the form of a removable SD memoiy card. A main memoiy (e.g. main memoiy 603) may for instance be a volatile memory. It may for instance be a DRAM memoiy, to give non-limiting example. It may for instance be used as a working memoiy' for processor 601 when executing an operating system, an application, a program, and / or the like. Processor 601 further controls a communication interface 604 (e.g. radio interface) configured to receive and / or transmit data and / or information. For instance, communication interface 604 may be configured to transmit and / or receive radio signals from a network node, such as a base station, in particular as described herein. It is to be understood that any computer program code based processing required for receiving and / or evaluating radio signals may be stored in an own memory of communication interface 604 and executed by an own processor of communication interface 604 and / or it may be stored for example in memory 603 and executed for example by processor 601. Additionally, the communication interface 604 may further comprise a BLE and / or Bluetooth radio interface including a BLE transmitter, receiver or transceiver. For example, radio interface 604 may additionally or alternatively comprise a WLAN radio interface including at least a WLAN transmitter, receiver or transceiver. The components 602 to 604 of user equipment 600 may for instance be connected with processor 601 by means of one or more serial and / or parallel busses. It is to be understood that user equipment 600 may comprise various other components. For example, user equipment 600 may optionally comprise a user interface (e.g. a touch-sensitive display, a keyboard, a touchpad, a display, etc.). Fig. 7 is a block diagram of an exemplary embodiment of a network device 700, such as a base station (in particular a gNB or 6gNB). For instance, network device 700 may be configured for scheduling and / or transmitting signals to the user equipment(s), as described above. Network device 700 comprises a processor 701. Processor 701 may represent a single processor or two or more processors, which are for instance at least partially coupled, for instance via a bus. Processor 701 executes a program code stored in program mcmon 702 (for instance program code causing network device 700 to perform alone or together with one or more user equipments 600 embodiments according to the present disclosure or parts thereof), and interfaces with a main memory 703. Program memoiy 702 may also comprise an operating system for processor 701. Some or all of memories 702 and 703 may also be included into processor 701. Moreover, processor 701 controls a communication interface 704 which is for example configured to communicate according to a cellular communication system like a 2G / 3G / 4G / 5G or future generation cellular communication system. Communication interface 704 of network device 700 may be realized by radio heads for instance and may be provided for communication between network node and the user equipment, as described above. The components 702 to 704 of network device 700 may for instance be connected with processor 701 by means of one or more serial and / or parallel busses. It is to be understood that user equipment 600 and network device 700 may comprise various other components. Fig. 8 is a schematic illustration of examples of tangible and non-transitoiy computer-readable storage media according to the present disclosure that may for instance be used to implement memory 602 of Fig. 6 or memory 702 of Fig. 7. To this end, Fig. 8 displays a flash memory 800, which may for instance be soldered or bonded to a printed circuit board, a solid-state drive 801 comprising a plurality of memory chips (e.g. Flash memory chips), a magnetic hard drive 802, a Secure Digital (SD) card 803, a Universal Serial Bus (USB) memory stick 804, an optical storage medium 805 (such as for instance a CD-ROM or DVD) and a magnetic storage medium 806. Any presented connection in the described embodiments is to be understood in a way that the involved components are operationally coupled. Thus, the connections can be direct or indirect with any number or combination of intervening elements, and there may be merely a functional relationship between the components. Further, as used in this text, the term ‘circuitry’ refers to any of the following: (a) hardware-only circuit implementations (such as implementations in only analog and / or digital circuitry) (b) combinations of circuits and software (and / or firmware), such as: (i) to a combination of processor(s) or (ii) to sections of processor(s) / software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone, to perform various functions) and (c) to circuits, such as a microprocessors) or a section of a microprocessor s), that re-quire software or firmware for operation, even if the software or firmware is not physically present. This definition of ‘circuitry'’ applies to all uses of this term in this text, including in any claims. As a further example, as used in this text, the term ‘circuitry’ also covers an implementation of merely a processor (or multiple processors) or section of a processor and its (or their) accompanying software and / or firmware. The term ‘circuitry'’ also covers, for example, a baseband integrated circuit or applications processor integrated circuit for a mobile phone. Any of the processors mentioned in this text, in particular but not limited to processors 601 and 701 of Figs. 6 and 7, could be a processor of any suitable type. Any processor may comprise but is not limited to one or more microprocessors, one or more processors) with accompanying digital signal processor(s), one or more processor(s) without accompanying digital signal processor(s), one or more special-purpose computer chips, one or more field-programmable gate arrays (FPGAS). one or more controllers, one or more applicationspecific integrated circuits (ASICS), or one or more computer(s). The relevant structure / hardware has been programmed in such a way to carry out the described function. Moreover, any of the actions or steps described or illustrated herein may be implemented using executable instructions in a general-purpose or special-purpose processor and stored on a computer-readable storage medium (e.g., disk, memory, or the like) to be executed by such a processor. References to ‘computer-readable storage medium’ should be understood to encompass specialized circuits such as FPGAs. ASICs, signal processing devices, and other devices. Moreover, any of the actions described or illustrated herein may be implemented using executable instructions in a general-purpose or special-purpose processor and stored on a computer-readable storage medium (e.g., disk, memory, or the like) to be executed by such a processor. References to ‘computer-readable storage medium’ should be understood to encompass specialized circuits such as FPGAs, ASICs, signal processing devices, and other devices. The wording “A, or B. or C, or a combination thereof’ or “at least one of A, B and C” may be understood to be not exhaustive and to include at least the following: (i) A, or (ii) B. or (iii) C. or (iv) A and B. or (v) A and C, or (vi) B and C. or (vii) A and B and C. It will be understood that the embodiments disclosed herein are only exemplary, and that any feature presented for a particular exemplary embodiment may be used with any aspect of the present disclosure on its own or in combination with any feature presented for the same or another particular exemplary embodiment and / or in combination with any other feature not mentioned. It will further be understood that any feature presented for an example embodiment in a particular category may also be used in a corresponding manner in an example embodiment of any other category'. LIST OF ABBREVIATIONS AIoT loT SID NW scu UE gNB, gNodeB FDD TDD SBFD RX TX Ambient loT Internet of things Study Item Description Network Session Control Unit User Equipment 5G Next Generation Node B Frequency division duplex Time division duplex Sub-band non-overlapping full duplex Receive Transmit LNA PRU RSU FDcon 5 RXNF Low noise amplifier Positioning reference unit Road side unit Full duplex configuration Receiver Noise Figure

Claims

1. A first user equipment comprising:means for receiving an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment; andmeans for transmitting, based on the activator configuration, activation signals across the different supported transmit antenna configurations of die first user equipment for activating respective target tags.

2. The first user equipment of claim 1, wherein the activation signals are transmitted sequentially with the different supported transmit antenna configurations.

3. The first user equipment of claim 1 or 2 comprising:means for receiving a trigger message for triggering said transmitting, based on the activator configuration, of the activation signals.

4. The first user equipment of anyone of claims 1-3 comprising:means for receiving, in a tag activation session, an assignment assigning the first user equipment as one or more of:an activator for a tag at a selected transmit antenna configuration and at a frequency;both as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the first user equipment.

5. The first user equipment of anyone of claims 1-4 comprising:means for transmitting full duplex capability information of the first user equipment, wherein the full duplex capability information comprises information indicative of one or more of:whether or not the first user equipment supports full duplex communication;supported transmit antenna configurations;supported receive antenna configurations;a number of supported transmit antenna configurations;a number of supported receive antenna configurations;combinations of supported receive antenna configurations and supported transmit antenna configurations allowing full duplex communication; and / ora receive and transmit antenna configuration relationship map, indicating supported combinations of receive and transmit antenna configurations allowing full duplex communication.

6. A second user equipment comprising:means for receiving a reader configuration for measuring responses of activated target tags across different receive antenna configurations supported by the second user equipment;means for measuring, based on the reader configuration, respective responses of respective activated target tags across the different supported receive antenna configurations of the second user equipment; andmeans for transmitting a measurement report indicating respective responses measured by the second user equipment.

7. The first user equipment of claim 6 comprising:means for receiving a tag configuration comprising identifiers of targets tags.

8. The second user equipment of claim 6 or 7. wherein the measurement report comprises information indicative of one or more of:identifiers of target tags, from which a response was measured at the second user equipment;received signal strengths of responses of target tags measured at the second user equipment;for a respective receive antenna configuration of the second user equipment, identifiers of target tags, from which a response was measured with the respective receive antenna configuration;and / orfor a respective receive antenna configuration of the second user equipment, signal strengths of responses of target tags measured with the respective receive antenna configuration.

9. The second user equipment of anyone of claims 6-8, wherein respective responses of respective activated tags are measured sequentially with the different supported receive antenna configurations of the second user equipment.

10. The second user equipment of anyone of claims 6-9 comprising:means for receiving, in a tag activation session, an assigmnent assigning the second user equipment as one or more of:a reader for an activated tag at a selected receive antenna configuration and at a frequency; and / orboth as an activator for a tag at a selected transmit antenna configuration and at a first frequency and as a reader for another activated tag at a selected receive antenna configuration and at a second frequency, wherein the selected transmit antenna configuration and the selected receive antenna configuration allow full duplex communication for the second user equipment.

11. The second user equipment of anyone of claims 6-10 comprising:means for transmitting full duplex capability information of the second user equipment, wherein the full duplex capability information comprises information indicative of one or more of:whether or not the second user equipment supports full duplex communication;supported transmit antenna configurations;supported receive antenna configurations;a number of supported transmit antenna configurations;a number of supported receive antenna configurations;combinations of supported receive antenna configurations and supported transmit antenna configurations allowing full duplex communication; and / ora receive and transmit antenna configuration relationship map. indicating supported combinations of receive and transmit antenna configurations allowing full duplex communication.

12. A network device comprising:means for transmitting, to a first user equipment of a set of user equipments, an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment; andmeans for transmitting, to second user equipments of the set of user equipments, respective reader configurations for measuring responses, across different receive antenna configurations supported by respective ones of the second user equipments, of tire target tags activated by the first user equipment;means for receiving, from the second user equipments, respective measurement reports indicating respective responses measured by the respective second user equipments;means for generating, based on the received measurement reports, a mapping information indicating configurations of activators and readers for a tag activation session,means for assigning, based on die generated mapping information, one or more user equipments of the set of user equipments as activators for respective tags and one or more user equipments of the set of user equipments as readers for respective activated tags in a tag activation session.

13. The network device of claim 12 comprising:means for repeating said transmitting of an activator configuration, said transmitting of a reader configuration and said receiving of respective measurement reports for further first and respective second user equipments of the set of user equipments.

14. The network device of claim 13, wherein said repeating is performed until said transmitting of an activator configuration has been performed for each user equipment of the set of user equipments.

15. The network device of anyone of claims 12-14 comprising:means for receiving, from the first and / or second user equipments, full duplex capability information of the respective user equipment, wherein said assigning of one or more user equipments as activators and one or more user equipments as readers for a tag activation session is further based on the received full duplex capability information, wherein the capability full duplex information comprises information indicative of one or more of:whether or not the respective user equipment supports full duplex communication; transmit antenna configurations supported by the respective user equipment;receive antenna configurations supported by the respective user equipment;a number of transmit antenna configurations supported by the respective user equipment;a number of receive antenna configurations supported by the respective user equipment; combinations of receive antenna configurations and transmit antenna configurations supported by the respective user equipment and allowing full duplex communication; and / ora receive and transmit antenna configuration relationship map, indicating combinations of receive and transmit antenna configurations supported by the respective user equipment and allowing full duplex communication.

16. The network device of anyone of claims 12-15 comprising:means for transmitting, to the first user equipment, a trigger message for triggering a transmitting, based on the activator configuration, of activation signals for activating target tags across the transmit antenna configurations supported by the first user equipment.

17. The network device of anyone of claims 12-16, wherein, in the tag activation session, based on the generated mapping information, one or more of:one or more user equipments from the set of user equipments are assigned as activators for respective tags at respective selected transmit antenna configurations;one or more user equipments from the set of user equipments are assigned as readers for respective activated tags at respective selected transmit antenna configurations;one or more user equipments from the set of user equipments are assigned as activators for respective tags at least in part at different frequencies;multiple user equipments from the set of user equipments are assigned as readers for respective activated tags at least in part at different frequencies;at least one user equipment from the set of user equipments is assigned both as an activator for a tag at a respective selected transmit antenna configuration and a respective frequency and as a reader for another activated tag at a respective selected receive antenna configuration and a respective frequency, wherein the respective selected transmit antenna configuration and the respective selected receive antenna configuration allow full duplex communication for the at least one user equipment.

18. The network device of anyone of claims 12-17, comprising:means for receiving, in the tag activation session, form the user equipments assigned as readers for respective activated tags, respective measurement reports indicating respective responses measured by tire respective user equipments in parallel.

19. A system comprising:a plurality of tags;a plurality of user equipments, each being configurable to be a first user equipment according to anyone of claims 1-5 and being configurable to be a second user equipment according to anyone of claims 6-11; anda network device of any one of claims 12-18.

20. A method, performed by at least a first user equipment, the method comprising:receiving an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment; andtransmitting, based on the activator configuration, activation signals across tire different supported transmit antenna configurations of the first user equipment for activating respective target tags.

21. A method, performed by at least a second user equipment, the method comprising:receiving a reader configuration for measuring responses of activated target tags across different receive antenna configurations supported by the second user equipment;measuring, based on the reader configuration, respective responses of respective activated target tags across the different supported receive antenna configurations of the second user equipment; andtransmitting a measurement report indicating respective responses measured by the second user equipment.

22. A method, performed by at least one network device, the method comprising:transmitting, to a first user equipment of a set of user equipments, an activator configuration for activating target tags across different transmit antenna configurations supported by the first user equipment: andtransmitting, to second user equipments of the set of user equipments, respective reader configurations for measuring responses, across different receive antenna configurations supported by respective ones of the second user equipments, of the target tags activated by the first user equipment;receiving, from the second user equipments, respective measurement reports indicating respective responses measured by the respective second user equipments;generating, based on the received measurement reports, a mapping information indicating configurations of activators and readers for a tag activation session,assigning, based on the generated mapping information, one or more user equipments of the set of user equipments as activators for respective tags and one or more user equipments of the set of user equipments as readers for respective activated tags in a tag activation session.

23. Computer program code, the computer program code when executed by a processor of an apparatus causing an apparatus to perform a method of anyone of claims 20-22.

24. Computer storage medium comprising computer program code of claim 23.

Images