Sidelink power control for non-omnidirectional sidelink transmission

Abstract

An apparatus (110_1, fig 2) comprising: means for determining 301, among a plurality of beams (a1 …aM) and / or antennas available at the apparatus, at least one first beam (202, a’) and / or antenna to be used for transmitting at least one sidelink, SL, transmission (Physical Sidelink Shared Channel, PSSCH, transmission, 201) to at least one second apparatus (110_2); means for determining 302, using the at least one first beam and / or antenna, at least one pathloss (PL1) between the apparatus and at least one third apparatus (120_2); and means for determining 303, at least one transmit power for the at least one Side-Link transmission based, at least in part, on the at least one pathloss. Means for determining the pathloss comprises: using the at least one first beam / antenna to receive at least one Reference Signal, RS, from the third apparatus; and measuring the received signal strength of the received RS. The at least one RS comprises a plurality of RSs, and determining the pathloss comprises determining at least one highest received signal strength from among a plurality of measured received signal strengths. The at least one transmit power is determined based at least in part on the at least one highest received signal strength. For use in a wireless communication system employing Sidelink power control, in particular for non-omnidirectional (e.g., beamformed) sidelink transmission.

Description

TECHNOLOGICAL FIELD Examples of the disclosure relate generally to wireless communication systems, in particular apparatuses, methods, and computer programs for use in a wireless communication system. Some examples, though without prejudice to the foregoing, relate to apparatuses, methods, and computer programs for Sidelink power control, in particular for non-omnidirectional (e.g., beamformed) sidelink transmission. BACKGROUND In a typical wireless communication system (such as a Radio Access Network, RAN) terminal devices (such as User Equipment, UE) may communicate with each other via one or more Base Stations, BS, (such as gNBs). With Sidelink, SL, communication, a UE may communicate directly with another UE without going via a BS. However, SL communication between UEs may interfere with communication between other UEs and BSs. For example, an SL transmission could adversely affect or interfere with a BS's reception of an Uplink, UL, transmission from other UE. Conventional co-existence of SL transmissions and UL transmissions is not always optimal. In some circumstances it can be desirable to improve co-existence of SL transmissions and Uplink, UL, transmissions. In some circumstances it can be desirable to reduce SL transmissions interfering with the reception of UL transmissions. Conventional power control for SL transmissions is not always optimal. In some circumstances it can be desirable to improve power control for SL transmissions. The listing or discussion of any prior-published document or any background in this specification should not necessarily be taken as an acknowledgement that the document or background is part of the state of the art or is common general knowledge. One or more aspects / examples of the present disclosure may or may not address one or more of the background issues. BRIEF SUMMARY According to various, but not necessarily all, examples of the disclosure there are provided examples as claimed in the appended claims. Any examples and features described in this specification that do not fall under the scope of the independent claims are to be interpreted as examples useful for understanding various embodiments of the invention. According to at least some examples of the disclosure there is provided an apparatus comprising: means for determining, among a plurality of beams and / or antennas available at the apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus; means for determining, using the at least one first beam and / or antenna, at least one pathloss between the apparatus and at least one third apparatus; and means for determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss. According to various, but not necessarily all, examples of the disclosure there is provided a method comprising: determining, from among a plurality of beams and / or antennas available at an apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus; determining, using the at least one first beam and / or antenna, at least one pathloss between the apparatus and at least one third apparatus; and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss. According to various, but not necessarily all, examples of the disclosure there is provided a chipset comprising processing circuitry configured to perform the above-mentioned method. According to various, but not necessarily all, examples of the disclosure there is provided a module, circuitry, device and / or system comprising means for performing the above-mentioned method. According to various, but not necessarily all, examples of the disclosure there is provided a computer program comprising instructions, which when executed by an apparatus, cause the apparatus to perform: determining, from among a plurality of beams and / or antennas available at the apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus; determining, using the at least one first beam and / or antenna, at least one pathloss between the apparatus and at least one third apparatus; and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss. According to various, but not necessarily all, examples of the disclosure there is provided an apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine, from among a plurality of beams and / or antennas available at the apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus; determine, using the at least one first beam and / or antenna, at least one pathloss between the apparatus and at least one third apparatus; and determine at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss. According to various, but not necessarily all, examples of the disclosure there is provided a non-transitory computer readable medium encoded with instructions that, when executed by at least one processor, causes at least the following to be performed: determine, from among a plurality of beams and / or antennas available at the apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus; determine, using the at least one first beam and / or antenna, at least one pathloss between the apparatus and at least one third apparatus; and determine at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss. The following portion of this 'Brief Summary' section describes various features that can be features of any of the examples described in the foregoing portion of the 'Brief Summary' section mutatis mutandis. The description of a function should additionally be considered to also disclose any means suitable for performing that function, or any instructions stored in at least one memory that, when executed by at least one processor, cause an apparatus to perform that function. In some but not necessarily all examples, the apparatus further comprises means for controlling transmission of the least one SL transmission based, at least in part, on the at least one transmit power and / or the at least one pathloss. In some but not necessarily all examples, the apparatus further comprises means for determining, based at least in part on the at least one transmit power, whether to transmit the at least one SL transmission. In some but not necessarily all examples, the apparatus further comprises means for determining, based at least in part on the at least one transmit power, whether to transmit the at least one SL transmission via the at least one first beam and / or antenna. In some but not necessarily all examples, the apparatus further comprises means for determining, based at least in part on the at least one transmit power, at least one second beam and / or antenna to be used for transmitting the at least one SL transmission to the at least one second apparatus, wherein the at least one second beam and / or antenna is different to the at least one first beam and / or antenna. In some but not necessarily all examples, the apparatus further comprises means for determining, based at least in part on the at least one transmit power, whether to transmit the at least one SL transmission via at least one second beam and / or antenna, wherein the at least one second beam and / or antenna is different to the at least one first beam and / or antenna. In some but not necessarily all examples, determining whether to transmit the at least one SL transmission via the at least one first beam and / or antenna is based at least in part on determining whether the at least one transmit power crosses a threshold value. In some but not necessarily all examples, wherein the threshold value is based at least in part on at least one of the following: a received signal strength of a reference signal associated with the at least one second apparatus, or a Modulation and Coding Scheme, MCS, to be used for the at least one SL transmission. In some but not necessarily all examples, wherein the means for determining the at least one pathloss comprises: means for using the at least one first beam and / or antenna to receive at least one Reference Signal, RS, from the at least one third apparatus; and means for measuring at least one received signal strength of the at least one RS received by the at least one first beam and / or antenna. In some but not necessarily all examples, the apparatus further comprises means for receiving configuration information for measuring the at least one RS. In some but not necessarily all examples, the at least one RS comprises a plurality of RSs, and wherein the means for determining the at least one pathloss comprises: means for determining at least one highest received signal strength from among a plurality of measured received signal strengths. In some but not necessarily all examples, the at least one transmit power is determined based at least in part on the at least one highest received signal strength. In some but not necessarily all examples, the at least one third apparatus comprises at least one of the following: a node of a Radio Access Network, a non-serving cell of the apparatus, or a User Equipment. In some but not necessarily all examples, the at least one SL transmission comprises at least one of the following: a Physical Sidelink Control Channel, PSCCH, transmission, a Physical Sidelink Shared Channel, PSSCH, transmission, a Physical Sidelink Feedback Channel PSFCH, transmission, a Sidelink Channel State Information Reference Signal, SL CSI-RS, transmission, a Sidelink Synchronization Signal Block, S-SSB, transmission, or a Sidelink Positioning Reference Signal, SL-PRS, transmission. According to at least some examples of the disclosure there is provided an apparatus comprising: means for determining, among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission from the at least one first apparatus to at least one second apparatus; means for causing transmission, to the at least one first apparatus, of information indicative of the at least one first beam and / or antenna; means for receiving, from the at least one first apparatus, information indicative of at least one pathloss between the at least one first apparatus and at least one third apparatus, wherein the at least one pathloss is determined using the at least one first beam and / or antenna of the at least one first apparatus; means for determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and means for causing transmission, to the at least one first apparatus, control information for controlling a transmission of the at least one SL transmission by the at least one first apparatus, wherein the control information is based at least in part on the at least one transmit power. According to various, but not necessarily all, examples of the disclosure there is provided a method comprising: determining, among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission from the at least one first apparatus to at least one second apparatus; causing transmission, to the at least one first apparatus, of information indicative of the at least one first beam and / or antenna; receiving, from the at least one first apparatus, information indicative of at least one pathloss between the at least one first apparatus and at least one third apparatus, wherein the at least one pathloss is determined using the at least one first beam and / or antenna of the at least one first apparatus; determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and causing transmission, to the at least one first apparatus, control information for controlling a transmission of the at least one SL transmission by the at least one first apparatus, wherein the control information is based at least in part on the at least one transmit power. According to various, but not necessarily all, examples of the disclosure there is provided a chipset comprising processing circuitry configured to perform the above-mentioned method. According to various, but not necessarily all, examples of the disclosure there is provided a module, circuitry, device and / or system comprising means for performing the above-mentioned method. According to various, but not necessarily all, examples of the disclosure there is provided a computer program comprising instructions, which when executed by an apparatus, cause the apparatus to perform: determining, among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission from the at least one first apparatus to at least one second apparatus; transmitting, to the at least one first apparatus, of information indicative of the at least one first beam and / or antenna; receiving, from the at least one first apparatus, information indicative of at least one pathloss between the at least one first apparatus and at least one third apparatus, wherein the at least one pathloss is determined using the at least one first beam and / or antenna of the at least one first apparatus; determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmitting, to the at least one first apparatus, control information for controlling a transmission of the at least one SL transmission by the at least one first apparatus, wherein the control information is based at least in part on the at least one transmit power. According to various, but not necessarily all, examples of the disclosure there is provided an apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine, among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission from the at least one first apparatus to at least one second apparatus; transmit, to the at least one first apparatus, of information indicative of the at least one first beam and / or antenna; receive, from the at least one first apparatus, information indicative of at least one pathloss between the at least one first apparatus and at least one third apparatus, wherein the at least one pathloss is determined using the at least one first beam and / or antenna of the at least one first apparatus; determine at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmit, to the at least one first apparatus, control information for controlling a transmission of the at least one SL transmission by the at least one first apparatus, wherein the control information is based at least in part on the at least one transmit power. According to various, but not necessarily all, examples of the disclosure there is provided a non-transitory computer readable medium encoded with instructions that, when executed by at least one processor, causes at least the following to be performed: determine, among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission from the at least one first apparatus to at least one second apparatus; transmit, to the at least one first apparatus, of information indicative of the at least one first beam and / or antenna; receive, from the at least one first apparatus, information indicative of at least one pathloss between the at least one first apparatus and at least one third apparatus, wherein the at least one pathloss is determined using the at least one first beam and / or antenna of the at least one first apparatus; determine at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmit, to the at least one first apparatus, control information for controlling a transmission of the at least one SL transmission by the at least one first apparatus, wherein the control information is based at least in part on the at least one transmit power. According to at least some examples of the disclosure there is provided an apparatus comprising: means for determining configuration information for configuring at least one first apparatus to perform at least one sidelink, SL, power control procedure, wherein the SL power control procedure comprises: determining, among a plurality of beams and / or antennas available at the at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one SL transmission from the at least one first apparatus to at least one second apparatus, determining, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus, and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and means for transmitting, to the at least one first apparatus, the configuration information for configuring the at least one first apparatus to perform the at least one SL power control procedure. According to various, but not necessarily all, examples of the disclosure there is provided a method comprising: determining configuration information for configuring at least one first apparatus to perform at least one sidelink, SL, power control procedure, wherein the SL power control procedure comprises: determining, among a plurality of beams and / or antennas available at the at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one SL transmission from the at least one first apparatus to at least one second apparatus, determining, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus, and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmitting, to the at least one first apparatus, the configuration information for configuring the at least one first apparatus to perform the at least one SL power control procedure. According to various, but not necessarily all, examples of the disclosure there is provided a chipset comprising processing circuitry configured to perform the above-mentioned method. According to various, but not necessarily all, examples of the disclosure there is provided a module, circuitry, device and / or system comprising means for performing the above-mentioned method. According to various, but not necessarily all, examples of the disclosure there is provided a computer program comprising instructions, which when executed by an apparatus, cause the apparatus to perform: determining configuration information for configuring at least one first apparatus to perform at least one sidelink, SL, power control procedure, wherein the SL power control procedure comprises: determining, among a plurality of beams and / or antennas available at the at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one SL transmission from the at least one first apparatus to at least one second apparatus, determining, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus, and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmitting, to the at least one first apparatus, the configuration information for configuring the at least one first apparatus to perform the at least one SL power control procedure. According to various, but not necessarily all, examples of the disclosure there is provided an apparatus comprising: at least one processor; and at least one memory storing instructions that, when executed by the at least one processor, cause the apparatus at least to: determine configuration information for configuring at least one first apparatus to perform at least one sidelink, SL, power control procedure, wherein the SL power control procedure comprises: determining, among a plurality of beams and / or antennas available at the at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one SL transmission from the at least one first apparatus to at least one second apparatus, determining, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus, and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmit, to the at least one first apparatus, the configuration information for configuring the at least one first apparatus to perform the at least one SL power control procedure. According to various, but not necessarily all, examples of the disclosure there is provided a non-transitory computer readable medium encoded with instructions that, when executed by at least one processor, causes at least the following to be performed: determine configuration information for configuring at least one first apparatus to perform at least one sidelink, SL, power control procedure, wherein the SL power control procedure comprises: determining, among a plurality of beams and / or antennas available at the at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one SL transmission from the at least one first apparatus to at least one second apparatus, determining, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus, and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmit, to the at least one first apparatus, the configuration information for configuring the at least one first apparatus to perform the at least one SL power control procedure. While the above examples of the disclosure and optional features are described separately, it is to be understood that their provision in all possible combinations and permutations is contained within the disclosure. It is to be understood that various examples of the disclosure can comprise any or all of the features described in respect of other examples of the disclosure, and vice versa. Also, it is to be appreciated that any one or more or all of the features, in any combination, may be implemented by / comprised in / performable by an apparatus, a method, and / or computer program instructions as desired, and as appropriate. BRIEF DESCRIPTION OF THE DRAWINGS Some examples will now be described with reference to the accompanying drawings in which: FIG. 1 schematically illustrates an example of a radio telecommunications network suitable for use with an example of the subject matter described herein; FIG. 2 schematically illustrates an example of SL communication and UL communication in a radio telecommunications network; FIG. 3 schematically illustrates a method in accordance with an example of the subject matter described herein; FIG. 4 schematically illustrates an apparatus in accordance with an example of the subject matter described herein; Fig. 5 schematically illustrates a computer program in accordance with an example of the subject matter described herein; and FIG. 6 schematically illustrates a signalling diagram in accordance with an example of the subject matter described herein. The figures are not necessarily to scale. Certain features and views of the figures can be shown schematically or exaggerated in scale in the interest of clarity and conciseness. For example, the dimensions of some elements in the figures can be exaggerated relative to other elements to aid explication. Similar reference numerals are used in the figures to designate similar features. For clarity, all reference numerals are not necessarily displayed in all figures. In the description and drawings, a reference number without a subscript (e.g. 123) can be used as a generic reference to a feature or class / set of features. A reference number with a subscript (e.g. 123_1) can be used as a specific reference, e.g. to differentiate different instances of a feature or class / set of features. ABBREVIATIONS / DEFINITIONS 3GPP BS CSI-RS DL FR1 FR2 gNB LOS MCS NLOS PL PRS PSCCH PSFCH PSSCH 3rd Generation Partnership Project Base Station Channel State Information - Reference Signal Downlink Frequency Range 1 Frequency Range 2 Next generation NodeB Line of Sight Modulation and Coding Scheme Non Line of Sight PathLoss Positioning Reference Signal Physical Sidelink Control Channel Physical Sidelink Feedback Channel Physical Sidelink Shared Channel PUSCH Physical Uplink Shared Channel QPSK Quadrature Phase Shift Keying RAN Radio Access Network RS Reference Signal RSRP Reference Signal Received Power RX Receive(r) SL Sidelink SL-PRS Sidelink PRS SSB Synchronization Signal Block S-SSB Sidelink SSB TX Transmit(ter) UE User Equipment UL Uplink DETAILED DESCRIPTION FIG. 1 schematically illustrates an example of a network 100 suitable for use with examples of the present disclosure. The network (also referred to as NW) comprises a plurality of network nodes including: terminal nodes 110 (also referred to as User Equipment, UE), access nodes 120 (also referred to as Radio Access Network, RAN, node, or Base Station, BS), and one or more core network nodes 130. The terminal nodes 110 and access nodes 120 communicate with each other. The one or more core network nodes 130 may, in some but not necessarily all examples, communicate with each other. The one or more access nodes 120 may, in some but not necessarily all examples, communicate with each other. The network 100 is, in this example, a radio telecommunications network, i.e. a RAN, in which at least some of the terminal nodes 110 and access nodes 120 communicate with each other using transmission / reception of radio waves. The network / RAN 100 may be a cellular network comprising a plurality of cells 122 each served by an access node 120. The access nodes 120 comprise cellular radio transceivers. The terminal nodes 110 comprise cellular radio transceivers. In the particular example illustrated and discussed below, the network 100 is a New Radio, NR, network of the Third Generation Partnership Project, 3GPP, and its fifth generation, 5G, technology. In other examples, the network 100 may be a network beyond 5G, for example a next generation (i.e. sixth generation, 6G) Radio Network that is currently under development (i.e. an evolution of the NR network and its 5G technology). The interfaces between the terminal nodes 110 and the access nodes 120 are radio interfaces 124 (e.g., Uu interfaces). The interfaces between the access nodes 120 and one or more core nodes 130 are backhaul interfaces 128 (e.g., S1 and / or Next Generation, NG, interfaces). The interfaces between the one or more location servers 140 and the one or more core nodes 130 are backhaul interface 132 (e.g., NLs interface). Depending on the exact deployment scenario, the access nodes 120 may be RAN nodes such as NG-RAN nodes. NG-RAN nodes may be gNodeBs, gNBs, that provide NG user plane and control plane protocol terminations towards the UE. The gNBs connected by means of NG interfaces to a 5G Core (5GC), more specifically to an Access and Mobility Management Function, AMF, by means of an NG Control Plane, NG-C, interface and to a User Plane Function, UPF, by means of an NG User Plane, NG-U, interface. The access nodes 120 may be interconnected with each other by means of Xn interfaces 126. The cellular network 100 may be configured to operate in licensed frequency bands, or unlicensed frequency bands (not least such as: unlicensed bands that rely upon a transmitting device to sense the radio resources / medium before commencing transmission, such as via a Listen Before Talk, LBT, procedure; and a 60GHz unlicensed band where beamforming may be required in order to achieve required coverage). The access nodes 120 may be deployed in an NG standalone operation / scenario. The access nodes 120 may be deployed in a NG non-standalone operation / scenario. The access nodes 120 may be deployed in a Carrier Aggregation, CA, operation / scenario. The access nodes 120 may be deployed in a Dual Connectivity, DC, operation / scenario, i.e., Multi Radio Access Technology - Dual Connectivity, MR-DC, or NR-DC. The access nodes 120 may be deployed in a Multi Connectivity, MC, operation / scenario. In such non-standalone / dual connectivity deployments, the access nodes 120 may be interconnected to each other by means of X2 or Xn interfaces, and connected to an Evolved Packet Core, EPC, by means of an S1 interface or to the 5GC by means of a NG interface. The access nodes 120 are network elements in the network responsible for radio transmission and reception in one or more cells 122 to or from the terminal nodes 110. The access nodes 120 are the network termination of a radio link. Each access node may host one or more Transmission Reception Points, TRPs. An access node 120 may be implemented as a single network equipment, or have a split architecture that is disaggregated / distributed over two or more RAN nodes, such as a Central Unit, CU, a Distributed Unit, DU, a Remote Radio Head-end, RRH, using different functional-split architectures and different interfaces. The terminal nodes 110 are network elements in the network that terminate the user side of the radio link. They are devices allowing access to network services. Terminal node 110 functionalities may be performed also by Mobile Termination, MT, part of an Integrated Access and Backhaul, IAB, node. The terminal nodes 110 may be referred to as User Equipment, UE, mobile terminals or mobile stations. The term 'User Equipment' may be used to designate mobile equipment comprising means, such as a smart card, for authentication / encryption etc. such as a Subscriber Identity Module, SIM. A SIM / SIM card can be a memory chip, a module, or a Universal Subscriber Identity Module (USIM). In some examples, the term 'User Equipment’ can be used to designate a location / position tag, a hyper / smart, a hyper / smart sensor, or a mobile equipment comprising circuitry embedded as part of the user equipment for authentication / encryption such as a software SIM. In the following description: a terminal node may be referred to simply as a UE 110; an access node or a RAN node may be referred to simply as a gNB or BS 120; and a node of the network (not least such as a UE, or BS) may be referred to simply as network node, NW node). Each of a BS and a UE may comprise one or more antennas, antenna patches and / or antenna panels, each comprising an array of antenna elements serving as receivers and transmitters under the control of a controller. The controller may control phase shifts and amplitudes of the radio frequency electrical signals applied to the antenna elements to generate a beamformed directional electromagnetic wave transmitted signal having a controlled direction / beam steering direction and a beam pattern (radiation pattern), thereby forming a transmission beam (e.g. a BS transmission beam for use with downlink, DL, transmission - referred to herein as a DL beam; and a UE transmission beam for use with uplink transmission - referred to herein as an UL beam). The transmission beam relates to a spatially directed transmission with power focussed in an aiming direction or beam steering / pointing angle, such an angle corresponding to a direction of a main lobe of the transmitted radiation pattern. The controller may process the phase shifts and amplitudes of radio frequency electrical signals from the antenna elements (such radio frequency electrical signals corresponding to transduced electrical signals from received electromagnetic wave signals) to achieve a preferred beamforming direction for reception, thereby forming a reception beam (e.g. a UE reception beam for use with downlink reception, and a BS reception beam for use with uplink reception). The reception beam relates to spatially directed reception wherein reception sensitivity is maximal at an aiming direction or pointing angle. Beamforming, to form directional links for radio communication, may be used to compensate for high path-losses due to poor radio frequency, RF, propagation, which may affect not least the high frequency transmissions that can be used with 5G NR networks, e.g. transmissions at Frequency Range 2, FR2, i.e. in the region of 24 - 52.6 GHz (as compared to sub 6 GHz range for Frequency Range 1, FR1) as well as frequencies in excess of FR2, i.e. above 52.6 GHz and especially on the 60 GHz unlicensed band(s). Transmission of signals to the UE from the BS is downlink, DL, transmission via a beam pair. Such a beam pair may be considered to comprise a directional transmission beam from the BS (referred to herein as a DL beam) and a directional reception beam of the UE. Such a directional transmitter-side beam and a corresponding aligned directional receiver side beam jointly provide a beam pair for DL transmission / reception and connectivity (i.e. an optimal radio communication link / channel within the constraints of power, bandwidth and signal quality). It is to be appreciated that the transmission and reception beams are not necessarily physically aligned towards each other (i.e. the transmitter and receiver may not be in direct Line of Sight, LOS, not least for example in Non-Line of Sight, NLOS, scenarios where there is a rich-scattering environment. In a 5G NR network, the beam pair may be considered to relate to a beamformed directional link from the BS to the UE, such a directional link having a directional transmission beam for BS transmission (BS DL Tx beam), and a corresponding aligned directional reception beam for the DL reception (UE DL Rx beam), such a transmission beam and reception beam for DL transmission thereby defining a beam pair for DL transmission / reception. Similarly, UL transmission of signals from the UE to the BS is via a beam pair comprising a directional transmission beam (from the UE) and directional reception beam (of the BS). Such a directional transmitter-side beam and a corresponding aligned directional receiver side beam jointly provide a beam pair for UL transmission / reception and connectivity. A transmitter, e.g. a transmitting BS, may use beam sweeping (i.e. transmitting reference signals from each of its directional transmission beams) to enable a receiver, e.g. a UE, to determine an optimal transmission beam that provides optimal reception by the receiver. The receiver may itself use beam sweeping, e.g. of its directional reception beams, to enable a receiver to determine an optimal reception beam that provides optimal reception by the receiver. In such a manner, the receiver's reception beam may be duly aligned with the determined optimal transmission beam. A UE may be configured to monitor a downlink reception quality parameter, for example, Reference Signal Received Power, RSRP, of a downlink reference signal, such as Synchronization Signal Block, SSB, and / or Channel State Information Reference Signal, CSI-RS. The downlink reception quality parameter may be dependent upon a pathloss incurred by the reference signals after propagation over the air. The downlink reception quality parameter may further be dependent upon downlink reception gain or loss, which may depend not least upon the number of antenna elements of the UE used for downlink reception and the beam steering angle. The UE can infer whether or not a candidate downlink beam having a particular beam steering angle is optimal or acceptable for use in DL communication based on the reception quality parameter for the candidate DL beam, i.e. if the RSRP is above a sensitivity limit (the sensitivity limit being defined as the lowest received power level at which the downlink can still be decoded at a given bit error rate). The UE may report its downlink reception quality parameter in a Layer 1, L1, report. L1 reports are part of Channel State Information, CSI. CSI-RS measurements and L1 reporting can be periodic, semi-periodic (which may be activated / deactivated by Medium Access Control, MAC, signalling) or aperiodic (which may be triggered by Downlink Control Information, DCI, signalling). L1 reporting may be on Physical Uplink Control Channel, PUCCH (periodic, semi-periodic) or Physical Uplink Shared Channel, PUSCH (aperiodic, semi-periodic). A UE, in addition to being capable of communicating with other UEs via BSs of a cellular network, may also be capable of and configured to communicate directly with one or more UEs. In this regard, the UE may be capable of and configured to perform device-to-device, D2D, communication - which may be referred to as Sidelink, SL, communication. Such D2D / SL communication may use a PC5 interface. PC5 refers to a reference point where the UE communicates directly with another UE over a direct channel (i.e. communication via a BS is not required). D2D communications may be short-range, network-less, direct communications. Direct communication in LTE uses SL for communication between devices and is defined by the PC5 interface. The radio interface for SL consists of 3 layers that include the physical layer (PHY), the medium access control (MAC), and Radio Resource Control (RRC). Detailed descriptions of these layers are provided in 3GPP 36.201 and its reference documents. SL in New Radio (NR) is defined in 3GPP’s release 16 of 5G NR. Similar to the directional / beamformed UL and DL transmissions described above (which may be employed when operating at frequencies above FR1), SL transmissions can likewise be directional / beamformed transmissions. For example, a directional SL transmission could be effected by virtue of being transmitted from a particular one or more antennas, antenna patches and / or antenna panels of a UE. For instance, where an SL enabled UE comprises a Vehicle-to-vehicle, V2V, device, comprising a first antenna located in a front bumper of a car and a second antenna located in a rear bumper of the car, directional SL transmissions could be effected via appropriate selection of which antenna is used for an SL transmission (e.g. using the first antenna would give rise to a forward directional SL transmission [i.e. weighted / biased in the car's forward facing direction] whereas the second antenna would provide a backward directional SL transmission [i.e. weighted / biased in the car’s rearward facing direction]). A directional / beamformed SL transmission could also be effected by controlling phase shifts and amplitudes of radio frequency electrical signals applied to antenna elements to generate a beamformed directional electromagnetic wave transmitted SL signal having a controlled direction / beam steering direction and a beam pattern (radiation pattern). As will be discussed further below, certain examples of the present disclosure may find application in beamformed or directional SL transmissions, such as which could be employed when performing SL communication at frequencies above FR1. FIG. 2 schematically illustrates an example of co-existence of SL communication and UL communication in a cellular network. The figure shows an example of an SL transmission (in this instance a Physical Sidelink Shared Channel, PSSCH, transmission) potentially interfering with a neighbouring cell’s reception of an UL transmission (in this instance a Physical Uplink Shared Channel, PUSCH, transmission). In the portion of a cellular network shown, there is a first cell 122_1 (co) and a second cell 122_2 (ci). Each of the first and second cells is served by its own BS, namely first BS 120_1 (BSco) and second BS 120_2 (BSq) respectively. A first UE 110_1 (A) is located in the first cell 122_1 and is served by the first BS 120_1. The first UE 110_1 is shown transmitting an SL transmission 201, via an SL transmit, TX, beam 202 (a’), to a second UE 110_2 (B). A third UE 110_3 (C) is located in the second cell 122_2 and is served by the second BS 120_2. The third UE 110_3 is shown transmitting an UL transmission 203, via an UL TX beam 204, to the second BS 120_2. The second BS 120_2 receives the UL transmission via an UL receive, RX, beam 205 (d'). At present, 3GPP specifications (e.g. 3GPP TS 38.213 version 18.1.0, clause 16.2) provide for SL power control based on a DL pathloss estimate (PLo) derived from measurements on Reference Signals, RS, transmitted in the transmitting UE's serving cell (co). Currently, SL power control is determined without consideration of the transmit beam (a’) to be used by the UE for the SL transmission. This is mainly due to an inherent assumption of omnidirectional (i.e., non-directional / beamformed) transmission for SL operation in FR1. However, for SL operation in FR2, SL transmissions may be directional / beamformed - such as is illustrated in FIG. 2. As a result of the directional SL transmission (i.e. via transmit beamforming for SL operation in FR2, or via the use of an antenna having a directional output), a DL pathloss estimate (PLo) obtained for the first UE’s serving cell (co) may not be useful as a measure of an interference potential towards other devices such as non-serving BSs (e.g. BSi) of non-serving cell(s) (e.g. c ). For instance, in the example shown, the PSSCH transmission from the transmitter UE (A) to the receiver UE (B) uses a transmit beam (a') that points away from the serving base station (BSo), but points towards a non-serving base station (BSi) (i.e. a base station that does not serve the first UE (A) itself). Such a directional / beamformed PSSCH transmission may significantly interfere with PUSCH reception(s) in such non-serving cell(s) (ci), even though there may be no significant impact on the serving cell (co). The possibility of interference impact in non-service cells may arise when the PUSCH receive beam (d’), for receiving a PUSCH transmission from the third UE (C) in the non-serving cell (c ), points towards the PSSCH transmitter UE (A) and / or its transmit beam (a’). As will be discussed in further detail below, examples of the present disclosure seek to improve co-existence of SL transmissions and Uplink, UL, transmissions by reducing / avoid SL transmissions interfering with the reception of UL transmissions. In certain examples, enhanced SL power control is provided (which may be employed for SL operation in FR2 licensed spectrum). By exploiting TX / RX beam correspondence, a transmitter UE (A) may use an SL transmit beam (a’), which has been selected for an SL transmission to a receiver UE (B), to perform measurements (e.g. RSRPi, ... , RSRPn) on reference signals (e.g. RSi,..., RSn) transmitted in one or more cells (co, ci). The reference signals may be, for example, SSBs or CSI-RSs. To prevent the SL transmission from interfering with UL reception(s) in such cell(s) (cO, c1), the transmitter UE (A) may adapt the transmit power to be used for the SL transmission based on the one or more RS measurements (RSRPi.....RSRPn). For example, the SL transmit power may be limited based on a highest received signal strength (RSRPmax) measured using the SL transmit beam (a’). Advantageously, examples may improve UL / SL co-channel coexistence, not least such as in operation in FR2 licensed spectrum with beamforming. By limiting the SL transmit power based on DL RS measurements performed using the SL transmit beam as a receive beam (i.e. exploiting TX / RX beam correspondence), an impact of the beamformed SL transmission on UL reception(s), in serving cell(s) as well as non-serving cell(s), may be minimized. FIG. 3 schematically illustrates a method 300 in accordance with an example of the subject matter described herein. The component blocks of FIG. 3 are functional and the functions described can be performed by a single physical entity (such as is described with reference to FIG. 4). The functions described can also be implemented by a computer program (such as is described with reference to FIG. 5). During discussion of FIG. 3, use will be made of reference numerals of features shown in other FIGs (not least FIG. 2 and FIG.4) for the purposes of explanation. The method 300 may be performed by an apparatus 10, which may be embodied in a UE or a BS. In the following example, the method is described as being performed by a first UE 110_1 (A). However, it is to be noted that in other examples, the method, or one or more of the method steps thereof, may be performed by a BS mutatis mutandis. In block 301, the first UE determines, from among a plurality of beams (a% ...aM) and / or antennas (not shown) available at the UE, a first beam 202 (a’) and / or a first antenna (not shown) to be used for transmitting an SL transmission 201 to a second UE 110_2 (B). The first UE may determine the transmit beam to be used for the SL transmission by selecting from a set of available beams (ai, ... , 3m) based on its own measurements or measurements performed at the second UE (i.e. the intended receiver of the SL transmission). In other examples, the transmit beam may be indicated by a BS, e.g., a serving BS (BSo) of the first UE. In other examples, the transmit beam may be indicated by the second UE. The SL transmission may be one or more of: a Physical Sidelink Control Channel, PSCCH, transmission, a Physical Sidelink Shared Channel, PSSCH, transmission, a Physical Sidelink Feedback Channel PSFCH, transmission, a Sidelink Channel State Information Reference Signal, SL CSI-RS, transmission, a Sidelink Synchronization Signal Block, S-SSB, transmission, or a Sidelink Positioning Reference Signal, SL-PRS, transmission. The SL transmission may be a unicast, groupcast or broadcast transmission. In block 302, the first UE determines a pathloss (PLi) or an estimate of pathloss of a channel to a third apparatus (not least for example BS 120_2 (BSi) or BS120_1 (BSo)) is determined, wherein the pathloss is determined using the first beam and / or antenna determined in block 301. The pathloss may be a DL pathloss determined via the first beam and / or antenna. The third apparatus may be one or more of: a node of a Radio Access Network, a nonserving cell of the apparatus, or a User Equipment. The determination of the pathloss may comprise: using the first beam and / or antenna to receive one or more Reference Signals, RSs, transmitted from the third apparatus, and measuring a received signal strength of the one or more RSs received via the first beam and / or antenna. The RS transmitted from the third apparatus, e.g. RS transmitted in a cell (co, ci) from a BS (BSo, BSi), and used for determining the DL pathloss may be DL SSB or CSI-RS signals. In some examples, the RS may be periodically transmitted by a (serving or non-serving) base station (BSo, BSi) using different DL transmit beams, i.e. in a beam sweeping procedure. Where a plurality of RS are received (via the first beam and / or antenna) and measured, the first UE may determine a highest received signal strength from among the plurality of measured received signal strengths. The transmit power may be determined based at least in part on the highest received signal strength. The first UE may receive configuration information for enabling it to measure one or more RSs from the third apparatus. For example, the first UE may receive, in a serving cell (co), configuration information for measuring RS transmitted in a non-serving cell (ci). The configuration information may include, for example, RS transmission resource(s) on which to perform the measurements. In block 303, a transmit power for the SL transmission is determined based, at least in part, on the pathloss determined in block 302. The first UE may control a transmission of the SL transmission based, at least in part, on the transmit power and / or the pathloss. The control of the transmission of the SL transmission may comprise one or more of: determining whether or not to transmit the SL transmission, determining whether or not to transmit the SL transmission via the first beam and / or antenna, and determining whether or not to transmit the SL transmission via an alternative beam and / or antenna. In this regard, in some examples, a further determination may be made, based at least in part on the transmit power determined in block 303, whether to transmit the SL transmission. Such a further determination may be based at least in part on whether the transmit power crosses a threshold value. The threshold value may be based, at least in part, on: a received signal strength of a reference signal associated with the at least one second apparatus, or a Modulation and Coding Scheme, MCS, to be used for the at least one SL transmission. In some examples, a determination is made, based at least in part on the transmit power determined in block 303, whether to transmit the at least one SL transmission via the first beam and / or antenna determined in block 301, or whether an alternative / different beam and / or antenna ought to be used instead. In some examples, a second beam and / or antenna to be used for transmitting the SL transmission to the second apparatus is determined, wherein the at least one second beam and / or antenna is different to the at least one first beam and / or antenna, and wherein the determination is based at least in part on the transmit power determined in block 303. In some examples, a determination is made, based at least in part on the transmit power determined in block 303, whether to transmit the at least one SL transmission via a second beam and / or antenna different to the first beam and / or antenna determined in block 301. In this regard, the first UE, i.e. transmitter UE (A), may determine that, as a result of determining a low DL pathloss (e.g., due to the transmit beam (a’) pointing directly at a neighbouring base station (BSi) as shown in FIG. 2), a determined transmit power (P) to be used for the SL transmission is to be limited to a low value (e.g., 0 dBm). However, performing the SL transmission at such a low transmit power may compromise reception at the second UE, i.e. receiver UE (B). This might hence lead to a low received signal quality and could lead to a decoding failure. In such cases, the first UE may re-consider the initially proposed use of the transmit beam (a'), and instead look for an alternative transmit beam (a” - not shown) which may perhaps not be the optimal / best fit for communicating with the second UE, but which does have a lower interference potential towards the cellular network and the third apparatus, i.e. BSi and its cell c1. For example, the alternative beam (a”) may point towards a reflector rather than having direct line of sight, LOS, or the alternative beam may be wider than the original beam (a’). Such transmit beam re-selection may be caused / triggered by the first UE (A) determining a transmit power (P) below a threshold. The threshold for beam re-selection may depend on how resilient the SL transmission is expected to be. For example, if the second UE (B) is in close proximity of the first UE, (e.g. high RSRP measurements) and / or the first UE has selected a robust MCS for the SL transmission (e.g. Quadrature Phase Shift Keying, QPSK), the threshold may be very low. In some examples, the first BS 120_1 (BSo) may send configuration information to the first UE to configure the UE to perform an SL power control procedure, wherein the SL power control procedure comprises the steps 301 -303 of the above-described method 300. In this regard, the first BS: determines configuration information for configuring the first UE to perform: determining a first beam and / or antenna to be used for transmitting an SL transmission from the first UE to a second UE, determining, using the first beam and / or antenna, a pathloss between the first UE and a third apparatus (e.g. a second BS 120_2 or even the first BS itself), and determining a transmit power for the SL transmission based, at least in part, on the pathloss; and transmits the configuration information to the first UE to configure the first UE to perform the SL power control procedure. In the above described method and examples, the various steps are performed by a UE, e.g. the first UE 110_1 (A). However, in another example, a BS, e.g. a BS (BSo) serving a first UE, performs the method steps illustrated in FIG. 3. In this regard, a BS: determines a first beam and / or antenna to be used for transmitting an SL transmission from a first UE to a second UE; determines (e.g. receives, from the first UE, information indicative of) a pathloss between the first UE and a third apparatus, wherein the pathloss has been determined by the first UE using the first beam and / or antenna; and determines at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss. In some examples, the BS may perform block 301, i.e. the BS may determine a first beam and / or antenna, of the first UE, that is to be used for transmitting an SL transmission from the first UE to a second UE. The BS may then transmit, to the first UE, information indicative of the determined first beam and / or antenna. The first UE may then use the first beam and / or antenna to determine a pathloss between the first UE and a third apparatus (e.g. a second BS 120_2). The BS may then receive, from the first UE, information indicative of the pathloss that the first UE determined using the first beam and / or antenna. The BS may then determine a transmit power for the SL transmission based, at least in part, on the received pathloss. The BS may determine control information for controlling a transmission of the SL transmission by the first UE, wherein the control information is based at least in part on the transmit power. The BS may then transmit the control information to the first UE. In some examples, the control information may comprise information indicative of whether the first UE should at least one of: transmit the SL transmission; transmit the SL transmission via the first beam and / or antenna; transmit the SL transmission via an alternative beam and / or antenna, e.g. a second beam and / or antenna different to the first beam and / or antenna. FIG. 4 schematically illustrates a block diagram of an apparatus 10 for performing the methods, processes, procedures and signalling described in the present disclosure and illustrated in FIG. 3 as described above and FIG. 6 as described below. In this regard the apparatus can perform the roles of a UE 110 or a BS 120, in the methods illustrated and described methods. The component blocks of FIG. 4 are functional and the functions described can be performed by a single physical entity. The apparatus comprises a controller 11, which could be provided within a device such as a UE 110 ora BS 120. The controller 11 can be embodied by a computing device, not least such as those mentioned above. In some, but not necessarily all examples, the apparatus can be embodied as a chip, chip set, circuitry or module, i.e. for use in any of the foregoing. As used here 'module' refers to a unit or apparatus that excludes certain parts / components that would be added by an end manufacturer or a user. Implementation of the controller 11 can be as controller circuitry. The controller 11 can be implemented in hardware alone, have certain aspects in software including firmware alone or can be a combination of hardware and software (including firmware). The controller 11 can be implemented using instructions that enable hardware functionality, for example, by using executable instructions of a computer program 14 in a general-purpose or special-purpose processor 12 that can be stored on a computer readable storage medium 13, for example memory, or disk etc, to be executed by such a processor 12. The processor 12 is configured to read from and write to the memory 13. The processor 12 can also comprise an output interface via which data and / or commands are output by the processor 12 and an input interface via which data and / or commands are input to the processor 12. The apparatus can be coupled to or comprise one or more other components 15 (not least for example: a radio transceiver, sensors, input / output user interface elements and / or other modules / devices / components for inputting and outputting data / commands). The memory 13 stores instructions such as a computer program 14 comprising such instructions (e.g. computer program instructions / code) that controls the operation of the apparatus 10 when loaded into the processor 12. The instructions of the computer program 14, provide the logic and routines that enables the apparatus to perform the methods, processes and procedures described in the present disclosure and illustrated in FIGs. 3 and 6. The processor 12 by reading the memory 13 is able to load and execute the computer program 14. The instructions may be comprised in a computer program, a non-transitory computer readable medium, a computer program product, a machine readable medium. The term "non-transitory," as used herein, is a limitation of the medium itself (i.e. tangible, not a signal) as opposed to a limitation on data storage persistency (e.g. RAM vs. ROM). In some but not necessarily all examples, the computer program instructions may be distributed over more than one computer program. Although the memory 13 is illustrated as a single component / circuitry it can be implemented as one or more separate components / circuitry some or all of which can be integrated / removable and / or can provide permanent / semi-permanent / dynamic / cached storage. Although the processor 12 is illustrated as a single component / circuitry it can be implemented as one or more separate components / circuitry some or all of which can be integrated / removable. The processor 12 can be a single core or multi-core processor. The apparatus can include one or more components for effecting the methods, processes and procedures described in the present disclosure and illustrated in FIGs. 3 and 6. It is contemplated that the functions of these components can be combined in one or more components or performed by other components of equivalent functionality. The description of a function should additionally be considered to also disclose any means suitable for performing that function. Where a structural feature has been described, it can be replaced by means for performing one or more of the functions of the structural feature whether that function or those functions are explicitly or implicitly described. Although examples of the apparatus have been described above in terms of comprising various components, it should be understood that the components can be embodied as or otherwise controlled by a corresponding controller or circuitry such as one or more processing elements or processors of the apparatus. In this regard, each of the components described above can be one or more of any device, means or circuitry embodied in hardware, software or a combination of hardware and software that is configured to perform the corresponding functions of the respective components as described above. The apparatus can, for example, be a client device, a server device, a UE, a mobile cellular telephone, a base station in a mobile cellular telecommunication system, a wireless communications device, a hand-portable electronic device, a location / position tag, a hyper tag etc. The apparatus can be embodied by a computing device, not least such as those mentioned above. However, in some examples, the apparatus can be embodied as a chip, chip set, circuitry or module, i.e. for use in any of the foregoing. In one example, the apparatus is embodied on a hand held portable electronic device, such as a mobile telephone, mobile communication device, wearable computing device or personal digital assistant, that can additionally provide one or more audio / text / video communication functions (for example tele-communication, video-communication, and / or text transmission (Short Message Service (SMS) / Multimedia Message Service (MMS) / emailing) functions), interactive / non-interactive viewing functions (for example web-browsing, navigation, TV / program viewing functions), music recording / playing functions (for example Moving Picture Experts Group-1 Audio Layer 3 (MP3) or other format and / or (frequency modulation / amplitude modulation) radio broadcast recording / playing), downloading / sending of data functions, image capture function (for example using a (for example in-built) digital camera), and gaming functions, or any combination thereof. In some examples (such as wherein the apparatus is provided within a UE 110), the apparatus 10 comprises: at least one processor 12; and at least one memory 13 storing instructions that, when executed by the at least one processor 12, cause the apparatus at least to: determine, from among a plurality of beams and / or antennas available at the apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus; determine, using the at least one first beam and / or antenna, at least one pathloss between the apparatus and at least one third apparatus; and determine at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss. In some examples (such as wherein the apparatus is provided within a BS 120), the apparatus 10 comprises: at least one processor 12; and at least one memory 13 storing instructions that, when executed by the at least one processor 12, cause the apparatus at least to: determine, from among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus; determine, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus; and determine at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss. In some examples where the apparatus is provided within a BS 120, the apparatus comprises: at least one processor 12; and at least one memory 13 storing instructions that, when executed by the at least one processor 12, cause the apparatus at least to: determine, among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission from the at least one first apparatus to at least one second apparatus; transmit, to the at least one first apparatus, of information indicative of the at least one first beam and / or antenna; receive, from the at least one first apparatus, information indicative of at least one pathloss between the at least one first apparatus and at least one third apparatus, wherein the at least one pathloss is determined using the at least one first beam and / or antenna of the at least one first apparatus; determine at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmit, to the at least one first apparatus, control information for controlling a transmission of the at least one SL transmission by the at least one first apparatus, wherein the control information is based at least in part on the at least one transmit power. In examples where the apparatus is provided within a BS 120, the apparatus comprises: at least one processor 12; and at least one memory 13 storing instructions that, when executed by the at least one processor 12, cause the apparatus at least to: determine configuration information for configuring at least one first apparatus to perform at least one sidelink, SL, power control procedure, wherein the SL power control procedure comprises: determining, among a plurality of beams and / or antennas available at the at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one SL transmission from the at least one first apparatus to at least one second apparatus, determining, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus, and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmit, to the at least one first apparatus, the configuration information for configuring the at least one first apparatus to perform the at least one SL power control procedure. The above described examples find application as enabling components of: telecommunication systems; tracking systems, automotive systems; electronic systems including consumer electronic products; distributed computing systems; media systems for generating or rendering media content including audio, visual and audio visual content and mixed, mediated, virtual and / or augmented reality; personal systems including personal health systems or personal fitness systems; navigation systems; user interfaces also known as human machine interfaces; networks including cellular, non-cellular, and optical networks; ad-hoc networks; the internet; the internet of things (I0T); Vehicle-to-everything (V2X), virtualized networks; and related software and services. The apparatus can be provided in an electronic device, for example, a mobile terminal, according to an example of the present disclosure. It should be understood, however, that a mobile terminal is merely illustrative of an electronic device that would benefit from examples of implementations of the present disclosure and, therefore, should not be taken to limit the scope of the present disclosure to the same. While in certain implementation examples, the apparatus can be provided in a mobile terminal, other types of electronic devices, such as, but not limited to: mobile communication devices, hand portable electronic devices, wearable computing devices, portable digital assistants (PDAs), pagers, mobile computers, desktop computers, televisions, gaming devices, laptop computers, cameras, video recorders, GPS devices and other types of electronic systems, can readily employ examples of the present disclosure. Furthermore, devices can readily employ examples of the present disclosure regardless of their intent to provide mobility. FIG.5, illustrates a computer program 14 which may be conveyed via a delivery mechanism 20. The delivery mechanism 20 can be any suitable delivery mechanism, for example, a machine readable medium, a computer-readable medium, a non-transitory computer-readable storage medium, a computer program product, a memory device, a solid-state memory, a record medium such as a Compact Disc Read-Only Memory (CD-ROM) or a Digital Versatile Disc (DVD) or an article of manufacture that comprises or tangibly embodies the computer program 14. The delivery mechanism can be a signal configured to reliably transfer the computer program. An apparatus can receive, propagate or transmit the computer program as a computer data signal. In certain examples of the present disclosure, there is provided a computer program comprising instructions, which when executed by an apparatus (e.g. UE 110), cause the apparatus to perform at least the following or for causing performing at least the following: determine, from among a plurality of beams and / or antennas available at the apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus; determine, using the at least one first beam and / or antenna, at least one pathloss between the apparatus and at least one third apparatus; and determine at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss. In certain examples of the present disclosure, there is provided a computer program comprising instructions, which when executed by an apparatus (e.g. BS 120), cause the apparatus to perform at least the following or for causing performing at least the following: determine, from among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus; determine, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus; and determine at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss. In certain examples of the present disclosure, there is provided computer program comprising instructions, which when executed by an apparatus (e.g. BS 120), cause the apparatus to perform at least the following or for causing performing at least the following: determine, among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission from the at least one first apparatus to at least one second apparatus; transmit, to the at least one first apparatus, of information indicative of the at least one first beam and / or antenna; receive, from the at least one first apparatus, information indicative of at least one pathloss between the at least one first apparatus and at least one third apparatus, wherein the at least one pathloss is determined using the at least one first beam and / or antenna of the at least one first apparatus; determine at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmit, to the at least one first apparatus, control information for controlling a transmission of the at least one SL transmission by the at least one first apparatus, wherein the control information is based at least in part on the at least one transmit power. In certain examples of the present disclosure, there is provided computer program comprising instructions, which when executed by an apparatus (e.g. BS 120), cause the apparatus to perform at least the following or for causing performing at least the following: determine configuration information for configuring at least one first apparatus to perform at least one sidelink, SL, power control procedure, wherein the SL power control procedure comprises: determining, among a plurality of beams and / or antennas available at the at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one SL transmission from the at least one first apparatus to at least one second apparatus, determining, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus, and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; and transmit, to the at least one first apparatus, the configuration information for configuring the at least one first apparatus to perform the at least one SL power control procedure. References to 'computer program', 'computer-readable storage medium’, 'computer program product’, 'tangibly embodied computer program' etc. or a 'controller’, 'computer’, 'processor’ etc. should be understood to encompass not only computers having different architectures such as single / multi- processor architectures and sequential (Von Neumann) / parallel architectures but also specialized circuits such as field-programmable gate arrays (FPGA), application specific circuits (ASIC), signal processing devices and other devices. References to computer program, instructions, code etc. should be understood to encompass software for a programmable processor or firmware such as, for example, the programmable content of a hardware device whether instructions for a processor, or configuration settings for a fixed-function device, gate array or programmable logic device etc. As used in this application, the term 'circuitry' can refer to one or more or all of the following: (a) hardware-only circuitry implementations (such as implementations in only analog and / or digital circuitry) and (b) combinations of hardware circuits and software, such as (as applicable): (i) a combination of analog and / or digital hardware circuit(s) with software / firmware and (ii) any portions of hardware processor(s) with software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions and (c) hardware circuit(s) and / or processor(s), such as a microprocessor(s) or a portion of a microprocessor(s), that requires software (for example firmware) for operation, but the software may not be present when it is not needed for operation. This definition of circuitry applies to all uses of this term in this application, including in any claims. As a further example, as used in this application, the term circuitry also covers an implementation of merely a hardware circuit or processor and its (or their) accompanying software and / or firmware. The term circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit for a mobile device or a similar integrated circuit in a server, a cellular network device, or other computing or network device. FIG. 6 schematically illustrates a signalling diagram / method in accordance with an example of the subject matter described herein. FIG. 6 can be considered to illustrate a plurality of methods, in the sense that FIG. 6 can be considered to illustrate one or more actions performed by / at a plurality of actors / entities (i.e. first BS 120_2, first UE 110_1, second BS 120_2 and second UE 110_2. FIG. 6 can therefore be considered to illustrate a plurality of individual methods performed by each respective individual actor / entity of the plurality of the actors / entities. One or more of the features discussed in relation to FIG. 6 can be found in one or more of the other FIGs. During discussion of FIG. 6, reference will be made to other FIGs for the purposes of explanation. In block 601, a first BS 120_1 transmits configuration information 602 to a first UE 110_1, wherein the configuration information comprises information for configuring the first UE to perform an SL TX power control procedure (the SL TX power control procedure comprising the method 300 of FIG. 3 and its steps 301 - 303). Responsive at least in part to the receipt of the configuration information 602, the first UE performs step 301. In this regard, the first UE determines a beam / antenna to be used for an SL transmission to be transmitted to a second UE 110_2. The beam / antenna to be used for the SL transmission may be determined via any suitable means / procedure. For example, the first UE may perform a TX beam sweeping procedure, wherein the first UE transmits plural reference signals via plural different transmit beams, which are measured by the second UE. The second UE determines, based on the measurements, an optimal transmit beam of the first UE. The second UE then reports back to the first UE with an indication of the determined transmit beam of the first UE. In other examples, the first UE performs an RX beam sweeping procedure, wherein the second UE transmits plural reference signals via plural different transmit beams, which are measured by the first UE. The second UE determines, based on the measurements, an optimal receive beam and thereby determines a corresponding optimal transmit beam (by exploiting TX / RX beam correspondence, wherein a good RX beam is assumed to be a good TX beam). In this case, no reporting is needed. In the example illustrated in FIG. 6, the first UE determines the beam / antenna to be used for the SL transmission by virtue of receiving, in block 603, an indication 604, from the first BS, of the beam / antenna to be used. The first BS can itself determine the beam / antenna to be used for the SL transmission via any suitable procedure, not least such as a procedure involving the first and second UE performing a TX or RX beam sweeping procedure and reporting the results of the same to the BS based at least in part on which the BS can use to determine an optimal beam / antenna to be used for the SL transmission. In block 605, the first BS 120_1 send further configuration information 606 to the first UE 110_1 for configuring the first UE to receive and measure RSs transmitted from a second BS 120_2. In some examples, the configuration information 606 could be included in the configuration information 602 that is sent to the first UE in block 601. Responsive to receipt of the configuration information 606 (and the configuration information 602), the first UE uses the first beam and / or antenna, to determine a pathloss of a path between itself and the second BS. In this regard, in block 607, the first UE receives an RS 608, sent from the second BS, via the beam and / or antenna determined in block 301. In block 609, the first UE measures the RS received via the beam and / or antenna. Based at least in part on the received measurement, the first UE determines the pathloss. The determination of the pathloss using the first beam and / or antenna may be determined via any suitable means / procedure. In some examples, rather that the reception-based determination of the pathloss (i.e. via the first UE's measurement of a RS received using the first beam and / or antenna); instead the pathloss could be determined via a transmissionbased determination (i.e. via the first UE’s transmission of a RS using the first beam and / or antenna and receiving a report of a measurement of the RS). In block 303, the first UE determines a transmit power for the SL transmission based, at least in part, on the determined pathloss. In this regard, as indicated in block 610, the transmit power for the SL transmission may be based, at least in part, on a measurement of the RS received via the beam and / or antenna determined in step 301. In block 611, the first UE controls a transmission of the SL transmission based, at least in part, on the determined transmit power. In this regard, the first UE may transmit the SL transmission having a transmit power in accordance with the determined transmit power. For instance, if the first UE were to determine that the transmit power was not so low / below a threshold such that the SL transmission’s reception at the second UE might be compromised (leading to a poor received signal quality and / or a decoding failure), then the first UE may decide to transmit the SL transmission via the beam and / or antenna determined in block 301. However, if it were determined that the transmit power was too low / below a threshold, then the first UE may decide to determine / select an alternative beam and / or antenna by which to transmit the SL transmission. The method of FIG. 6 represents one possible scenario among others. The order of the blocks shown is not absolutely required, so in principle, the various blocks can be performed out of order. Not all the blocks are essential. In certain examples one or more blocks can be performed in a different order or overlapping in time, in series or in parallel. One or more blocks can be omitted or added or changed in some combination of ways. Although various examples of the present disclosure have been described in the preceding paragraphs, it should be appreciated that modifications to the examples given can be made without departing from the scope of the invention as set out in the claims. For instance, examples of the present invention seek to avoid / reduce interference for a "victim" receiver device due to an SL transmission between UEs. In the above described example of FIG. 6, the victim device is a second BS 120_2, e.g. a BS (BSi) from a non-serving cell (ci). However, it is to be noted that in other examples, the victim device could be the first BS 120_1, e.g. a BS (BSo) of the cell (co) that serves the first UE. In other examples, the victim device could be another UE, e.g. a third UE. The method of FIG. 6 could be duly revised, mutatis mutandis, to change the victim device from the second BS 120_2 to another victim device. The blocks illustrated in FIGs. 3 and 6 can represent actions in a method, functionality performed by an apparatus, and / or sections of instructions / code in a computer program. It will be understood that each block and combinations of blocks illustrated in FIGs. 3 and 6, as well as the further functionality described above, can be implemented by various means, such as hardware, firmware, and / or software including one or more computer program instructions. For example, one or more of the functions described above can be performed by a duly configured apparatus (such as an apparatus [as shown in FIG. 4] comprising means for performing the above described functionality). One or more of the functions / functionality described above can be embodied by a duly configured computer program (such as a computer program [as shown in FIG. 5] comprising computer program instructions which embody the functions / functionality described above and which can be stored by a memory storage device and performed by a processor). As will be appreciated, any such computer program instructions can be loaded onto a computer or other programmable apparatus (i.e. hardware) to produce a machine, such that the instructions when performed on the programmable apparatus create means for implementing the functions / functionality specified in the blocks. These computer program instructions can also be stored in a computer-readable medium that can direct a programmable apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the blocks. The computer program instructions can also be loaded onto a programmable apparatus to cause a series of operational actions to be performed on the programmable apparatus to produce a computer-implemented process such that the instructions which are performed on the programmable apparatus provide actions for implementing the functions / functionality specified in the blocks. Various, but not necessarily all, examples of the present disclosure can take the form of a method, an apparatus, or a computer program. Accordingly, various, but not necessarily all, examples can be implemented in hardware, software or a combination of hardware and software. Various, but not necessarily all, examples of the present disclosure are described using flowchart illustrations and schematic block diagrams. It will be understood that each block (of the flowchart illustrations and block diagrams), and combinations of blocks, can be implemented by computer program instructions of a computer program. These program instructions can be provided to one or more processor(s), processing circuitry or controller(s) such that the instructions which execute on the same create means for causing implementing the functions specified in the block or blocks, i.e. such that the method can be computer implemented. The computer program instructions can be executed by the processor(s) to cause a series of operational block / steps / actions to be performed by the processor(s) to produce a computer implemented process such that the instructions which execute on the processor(s) provide block / steps for implementing the functions specified in the block or blocks. Accordingly, the blocks support: combinations of means for performing the specified functions; combinations of actions for performing the specified functions; and computer program instructions / algorithm for performing the specified functions. It will also be understood that each block, and combinations of blocks, can be implemented by special purpose hardware-based systems which perform the specified functions or actions, or combinations of special purpose hardware and computer program instructions. Various, but not necessarily all, examples of the present disclosure provide both a method and corresponding apparatus comprising various modules, means or circuitry that provide the functionality for performing / applying the actions of the method. The modules, means or circuitry can be implemented as hardware, or can be implemented as software or firmware to be performed by a computer processor. In the case of firmware or software, examples of the present disclosure can be provided as a computer program product including a computer readable storage structure embodying computer program instructions (i.e. the software or firmware) thereon for performing by the computer processor. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation. Features described in the preceding description can be used in combinations other than the combinations explicitly described. Although functions have been described with reference to certain features, those functions can be performable by other features whether described or not. Although features have been described with reference to certain examples, those features can also be present in other examples whether described or not. Accordingly, features described in relation to one example / aspect of the disclosure can include any or all of the features described in relation to another example / aspect of the disclosure, and vice versa, to the extent that they are not mutually inconsistent. The term ‘comprise’ is used in this document with an inclusive not an exclusive meaning. That is any reference to X comprising Y indicates that X can comprise only one Y or can comprise more than one Y. If it is intended to use 'comprise' with an exclusive meaning then it will be made clear in the context by referring to "comprising only one ...” or by using "consisting". In this description, the wording 'connect', 'couple' and 'communication' and their derivatives mean operationally connected / coupled / in communication. It should be appreciated that any number or combination of intervening components can exist (including no intervening components), i.e. so as to provide direct or indirect connection / coupling / communication. Any such intervening components can include hardware and / or software components. As used herein, the term "determine / determining" (and grammatical variants thereof) can include, not least: evaluating, calculating, computing, processing, deriving, measuring, investigating, identifying, looking up (for example, looking up in a table, a database or another data structure), ascertaining and the like. Also, "determining" can include receiving (for example, receiving information), retrieving / accessing (for example, retrieving / accessing data in a memory), obtaining and the like. Also, "determine / determining" can include resolving, selecting, choosing, establishing, inferring and the like. As used herein, a description of an action should also be considered to disclose enabling, and / or causing, and / or controlling that action. For example, a description of transmitting information should also be considered to disclose enabling, and / or causing, and / or controlling transmitting information. Similarly, for example, a description of an apparatus transmitting information should also be considered to disclose at least one means or controller of the apparatus enabling, and / or causing, and / or controlling the apparatus to transmit the information.” The term "means” as used in the description and in the claims may refer to one or more individual elements configured to perform the corresponding recited functionality or functionalities, or it may refer to several elements that perform such functionality or functionalities. Furthermore, several functionalities recited in the claims may be performed by the same individual means or the same combination of means. For example performing such functionality or functionalities may be caused in an apparatus by a processor that executes instructions stored in a memory of the apparatus. References to a parameter, or value of a parameter, should be understood to refer to "data indicative of”, "data defining” or "data representative of” the relevant parameter / parameter value if not explicitly stated (unless the context demands otherwise). The data may be in any way indicative of the relevant parameter / parameter value, and may be directly or indirectly indicative thereof. In this description, reference has been made to various examples. The description of features or functions in relation to an example indicates that those features or functions are present in that example. The use of the term 'example' or 'for example’, 'can' or 'may' in the text denotes, whether explicitly stated or not, that such features or functions are present in at least the described example, whether described as an example or not, and that they can be, but are not necessarily, present in some or all other examples. Thus 'example', 'for example’, 'can' or 'may' refers to a particular instance in a class of examples. A property of the instance can be a property of only that instance or a property of the class or a property of a sub-class of the class that includes some but not all of the instances in the class. In this description, references to "a / an / the" [feature, element, component, means ...] are used with an inclusive not an exclusive meaning and are to be interpreted as "at least one” [feature, element, component, means ...] unless explicitly stated otherwise. That is any reference to X comprising a / the Y indicates that X can comprise only one Y or can comprise more than one Y unless the context clearly indicates the contrary. If it is intended to use 'a' or 'the’ with an exclusive meaning then it will be made clear in the context. In some circumstances the use of 'at least one’ or 'one or more’ can be used to emphasise an inclusive meaning but the absence of these terms should not be taken to infer any exclusive meaning. As used herein, "at least one of the following: ” and "at least one of ” and similar wording, where the list of two or more elements are joined by "and" or "or”, mean at least any one of the elements, or at least any two or more of the elements, or at least all the elements. The presence of a feature (or combination of features) in a claim is a reference to that feature (or combination of features) itself and also to features that achieve substantially the same technical effect (equivalent features). The equivalent features include, for example, features that are variants and achieve substantially the same result in substantially the same way. The equivalent features include, for example, features that perform substantially the same function, in substantially the same way to achieve substantially the same result. In this description, reference has been made to various examples using adjectives or adjectival phrases to describe characteristics of the examples. Such a description of a characteristic in relation to an example indicates that the characteristic is present in some examples exactly as described and is present in other examples substantially as described. In the above description, the apparatus described can alternatively or in addition comprise an apparatus which in some other examples comprises a distributed system of apparatus, for example, a client / server apparatus system. In examples where an apparatus provided forms (or a method is implemented as) a distributed system, each apparatus forming a component and / or part of the system provides (or implements) one or more features which collectively implement an example of the present disclosure. In some examples, an apparatus is re-configured by an entity other than its initial manufacturer to implement an example of the present disclosure by being provided with additional software, for example by a user downloading such software, which when executed causes the apparatus to implement an example of the present disclosure (such implementation being either entirely by the apparatus or as part of a system of apparatus as mentioned hereinabove). The above description describes some examples of the present disclosure however those of ordinary skill in the art will be aware of possible alternative structures and method features which offer equivalent functionality to the specific examples of such structures and features described herein above and which for the sake of brevity and clarity have been omitted from the above description. Nonetheless, the above description should be read as implicitly including reference to such alternative structures and method features which provide equivalent functionality unless such alternative structures or method features are explicitly excluded in the above description of the examples of the present disclosure. Whilst endeavouring in the foregoing specification to draw attention to those features of examples of the present disclosure believed to be of particular importance it should be understood that the applicant claims protection in respect of any patentable feature or combination of features hereinbefore referred to and / or shown in the drawings whether or not particular emphasis has been placed thereon. The examples of the present disclosure and the accompanying claims can be suitably combined in any manner apparent to one of ordinary skill in the art. Separate references to an "example”, "in some examples" and / or the like in the description do not necessarily refer to the same example and are also not mutually exclusive unless so stated and / or except as will be readily apparent to those skilled in the art from the description. For instance, a feature, structure, process, block, step, action, or the like described in one example may also be included in other examples, but is not necessarily included. Each and every claim is incorporated as further disclosure into the specification and the claims are embodiment(s) of the present disclosure. Further, while the claims herein are provided as comprising specific dependencies, it is contemplated that any claims can depend from any other claims and that to the extent that any alternative embodiments can result from combining, integrating, and / or omitting features of the various claims and / or changing dependencies of claims, any such alternative embodiments and their equivalents are also within the scope of the disclosure.

Claims

We claim:

1. An apparatus comprising:means for determining, among a plurality of beams and / or antennas available at the apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus;means for determining, using the at least one first beam and / or antenna, at least one pathloss between the apparatus and at least one third apparatus; andmeans for determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss.

2. The apparatus of claim 1, further comprising means for controlling transmission of the least one SL transmission based, at least in part, on the at least one transmit power and / or the at least one pathloss.

3. The apparatus of any previous claim, further comprising means for determining, based at least in part on the at least one transmit power, whether to transmit the at least one SL transmission.

4. The apparatus of any previous claim, further comprising means for determining, based at least in part on the at least one transmit power, whether to transmit the at least one SL transmission via the at least one first beam and / or antenna.

5. The apparatus of any previous claim, further comprising means for determining, based at least in part on the at least one transmit power, at least one second beam and / or antenna to be used for transmitting the at least one SL transmission to the at least one second apparatus, wherein the at least one second beam and / or antenna is different to the at least one first beam and / or antenna.

6. The apparatus of any previous claim, further comprising means for determining, based at least in part on the at least one transmit power, whether to transmit the at least one SL transmission via at least one second beam and / or antenna, wherein the at least one second beam and / or antenna is different to the at least one first beam and / or antenna.

7. The apparatus of any of previous claim when dependent upon claim 4, wherein determining whether to transmit the at least one SL transmission via the at least one first beam and / or antenna is based at least in part on determining whether the at least one transmit power crosses a threshold value.

8. The apparatus of previous claim 7, wherein the threshold value is based at least in part on at least one of the following:a received signal strength of a reference signal associated with the at least one second apparatus, ora Modulation and Coding Scheme, MCS, to be used for the at least one SL transmission.

9. The apparatus of any previous claim, wherein the means for determining the at least one pathloss comprises:means for using the at least one first beam and / or antenna to receive at least one Reference Signal, RS, from the at least one third apparatus; andmeans for measuring at least one received signal strength of the at least one RS received by the at least one first beam and / or antenna.

10. The apparatus of claim 9, further comprising means for receiving configuration information for measuring the at least one RS.

11. The apparatus of any of previous claims 9 or 10, wherein the at least one RS comprises a plurality of RSs, and wherein the means for determining the at least one pathloss comprises:means for determining at least one highest received signal strength from among a plurality of measured received signal strengths.

12. The apparatus of claim 11, wherein the at least one transmit power is determined based at least in part on the at least one highest received signal strength.

13. The apparatus of any previous claim, wherein the at least one third apparatus comprises at least one of the following:a node of a Radio Access Network,a non-serving cell of the apparatus, ora User Equipment.

14. The apparatus of any previous claim, wherein the at least one SL transmission comprises at least one of the following:a Physical Sidelink Control Channel, PSCCH, transmission,a Physical Sidelink Shared Channel, PSSCH, transmission,a Physical Sidelink Feedback Channel PSFCH, transmission,a Sidelink Channel State Information Reference Signal, SL CSI-RS, transmission, a Sidelink Synchronization Signal Block, S-SSB, transmission, ora Sidelink Positioning Reference Signal, SL-PRS, transmission.

15. A chipset, circuitry, module of User Equipment comprising the apparatus of any of the previous claims.

16. A method comprising causing, at least in part, actions that result in:determining, from among a plurality of beams and / or antennas available at an apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus;determining, using the at least one first beam and / or antenna, at least one pathloss between the apparatus and at least one third apparatus; anddetermining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss.

17. Computer program comprising instructions, which when executed by an apparatus, cause the apparatus to perform:determining, from among a plurality of beams and / or antennas available at the apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission to at least one second apparatus;determining, using the at least one first beam and / or antenna, at least one pathloss between the apparatus and at least one third apparatus; anddetermining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss.

18. A node of a Radio Access Network, RAN, comprising:means for determining, among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission from the at least one first apparatus to at least one second apparatus;means for causing transmission, to the at least one first apparatus, of information indicative of the at least one first beam and / or antenna;means for receiving, from the at least one first apparatus, information indicative of at least one pathloss between the at least one first apparatus and at least one third apparatus, wherein the at least one pathloss is determined using the at least one first beam and / or antenna of the at least one first apparatus;means for determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; andmeans for causing transmission, to the at least one first apparatus, control information for controlling a transmission of the at least one SL transmission by the at least one first apparatus, wherein the control information is based at least in part on the at least one transmit power.

19. A method comprising causing, at least in part, actions that result in: determining, among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission from the at least one first apparatus to at least one second apparatus;transmitting, to the at least one first apparatus, of information indicative of the at least one first beam and / or antenna;receiving, from the at least one first apparatus, information indicative of at least one pathloss between the at least one first apparatus and at least one third apparatus, wherein the at least one pathloss is determined using the at least one first beam and / or antenna of the at least one first apparatus;determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; andtransmitting, to the at least one first apparatus, control information for controlling a transmission of the at least one SL transmission by the at least one first apparatus, wherein the control information is based at least in part on the at least one transmit power.

20. Computer program comprising instructions, which when executed by an apparatus, cause the apparatus to perform:determining, among a plurality of beams and / or antennas available at at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one sidelink, SL, transmission from the at least one first apparatus to at least one second apparatus;transmitting, to the at least one first apparatus, of information indicative of the at least one first beam and / or antenna;receiving, from the at least one first apparatus, information indicative of at least one pathloss between the at least one first apparatus and at least one third apparatus, wherein the at least one pathloss is determined using the at least one first beam and / or antenna of the at least one first apparatus;determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; andtransmitting, to the at least one first apparatus, control information for controlling a transmission of the at least one SL transmission by the at least one first apparatus, wherein the control information is based at least in part on the at least one transmit power.

21. A node of a Radio Access Network, RAN, comprising:means for determining configuration information for configuring at least one first apparatus to perform at least one sidelink, SL, power control procedure, wherein the SL power control procedure comprises:determining, among a plurality of beams and / or antennas available at the at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one SL transmission from the at least one first apparatus to at least one second apparatus,determining, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus, and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; andmeans for transmitting, to the at least one first apparatus, the configuration information for configuring the at least one first apparatus to perform the at least one SL power control procedure.

22. A method comprising causing, at least in part, actions that result in:determining configuration information for configuring at least one first apparatus to perform at least one sidelink, SL, power control procedure, wherein the SL power control procedure comprises:determining, among a plurality of beams and / or antennas available at the at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one SL transmission from the at least one first apparatus to at least one second apparatus,determining, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus, and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; andtransmitting, to the at least one first apparatus, the configuration information for configuring the at least one first apparatus to perform the at least one SL power control procedure.

23. Computer program comprising instructions, which when executed by an apparatus, cause the apparatus to perform:determining configuration information for configuring at least one first apparatus to perform at least one sidelink, SL, power control procedure, wherein the SL power control procedure comprises:determining, among a plurality of beams and / or antennas available at the at least one first apparatus, at least one first beam and / or antenna to be used for transmitting at least one SL transmission from the at least one first apparatus to at least one second apparatus,determining, using the at least one first beam and / or antenna, at least one pathloss between the at least one first apparatus and at least one third apparatus, and determining at least one transmit power for the at least one SL transmission based, at least in part, on the at least one pathloss; andtransmitting, to the at least one first apparatus, the configuration information for configuring the at least one first apparatus to perform the at least one SL power control procedure.

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