Network node, user equipment and methods for freequency compensation between transmit / receive points

Abstract

A method performed by a network node (12) for transmitting data to a UE (10) in a communication network. The network node (12) determines an uplink channel at each of a plurality of TRPs, based on a received uplink reference signal at the respective TRP. The network node (12) further determines an uplink frequency difference, at each of the plurality of TRPs, between the respective TRP and a reference TRP. The network node (12) subsequently compensates the determined uplink channel at each of the plurality of TRPs based on the respective determined uplink frequency difference.

Description

[0001]NETWORK NODE, USER EQUIPMENT AND METHODS PERFORMED THEREIN TECHNICAL FIELD Embodiments herein relate to a network node, a user equipment (UE) and methods performed therein. Furthermore, a computer program and a computer readable storage medium are also provided herein. In particular, embodiments herein relate to handling communication in a communication network. BACKGROUND In a typical communication network, UEs, also known as wireless communication devices, mobile stations, stations (STA) and / or wireless devices, communicate via a Radio Access Network (RAN) to one or more core networks (CNs). The RAN covers a geographical area which is divided into service areas or cell areas, with each service area or cell area being served by a radio network node such as a radio access node e.g., a Wi- Fi access point or a radio base station (RBS), which in some networks may also be denoted, for example, a NodeB, an eNodeB”, or a gNodeB. A service area or cell area is a geographical area where radio coverage is provided by the radio network node. The radio network node communicates over an air interface operating on radio frequencies with the wireless device within range of the radio network node. The radio network node communicates over a downlink (DL) to the UE and the UE communicates over an uplink (UL) to the radio network node. A Universal Mobile Telecommunications System (UMTS) is a third generation (3G) telecommunication network, which evolved from the second generation (2G) Global System for Mobile Communications (GSM). The UMTS terrestrial radio access network (UTRAN) is essentially a RAN using wideband code division multiple access (WCDMA)and / or High-Speed Packet Access (HSPA) for user equipment. In a forum known as theThird Generation Partnership Project (3GPP), telecommunications suppliers propose andagree upon standards for third generation networks and investigate enhanced data rateand radio capacity. In some RANs, e.g. as in UMTS, several radio network nodes may be connected, e.g., by landlines or microwave, to a controller node, such as a radio network controller (RNC) or a base station controller (BSC), which supervises and coordinates various activities of the plural radio network nodes connected thereto. This type of connection is sometimes referred to as a backhaul connection. The RNCs and BSCs are typically connected to one or more CNs. Specifications for the Evolved Packet System (EPS) have been completed within the 3GPP and this work continues in the coming 3GPP releases. The EPS comprises the Evolved Universal Terrestrial Radio Access Network (E-UTRAN), also known as theLong-Term Evolution (LTE) radio access network, and the Evolved Packet Core (EPC),also known as System Architecture Evolution (SAE) CN. E-UTRAN / LTE is a variant of a 3GPP radio access technology wherein the radio network nodes are directly connected tothe EPC CN rather than to RNCs. In general, in E-UTRAN / LTE the functions of an RNCare distributed between the radio network nodes, e.g. eNodeBs in LTE, and the core network. As such, the RAN of an EPS has an essentially “flat” architecture comprising radio network nodes which can be connected directly to one or more CNs, i.e. they do not need to be connected to the core via RNCs. With the emerging 5G technologies such as New Radio (NR), the use of a largenumber of transmit- and receive-antenna elements is of great interest as it makes itpossible to utilize beamforming, such as transmit-side and receive-side beamforming. Transmit-side beamforming means that the transmitter can amplify the transmitted signals in a selected direction or directions, while suppressing the transmitted signals in other directions. Similarly, on the receive-side, a receiver can amplify received signals coming from a selected direction or directions, while suppressing received unwanted signals coming from other directions. With reference to 5G architecture the 3GPP Network Functions (NF) in 5G are described as: The Application Function (AF) or Application Server (AS) interacts with the 3GPP Core Network and allows external parties to use the Exposure Application Programming Interfaces (API) offered by the network operator. The AF provides session related information to other nodes in the 5G core network (5GC). The Network Exposure Function (NEF) supports different functionalities and NEF supports different Exposure APIs. The Network Repository Function (NRF) works as a registration centre of NF. The Unified Data Repository (UDR) stores data grouped into distinct collections of subscription-related information: Subscription Data; Policy Data; Structured Data for Exposure; Application Data. The Session Management Function (SMF) supports different functionalities, e.g. SMF receives Policy and Charging Control (PCC) rules from the Policy Control Function (PCF) and configures the User Plane Function (UPF) accordingly. The User Plane Function (UPF) supports handling of user plane traffic based on the rules received from the SMF, e.g. packet inspection and different enforcement actions such as Quality of Service (QoS) handling. The PCF supports a unified policy framework to govern the network behaviour. Specifically, the PCF provides PCC rules to the Policy and Charging Enforcement Function (PCEF), i.e., the SMF / UPF that enforces policy and charging decisions according to provisioned PCC rules. The Access and Mobility Management Function (AMF) manages UE access, e.g., when a UE is connected through different access networks, and UE mobility aspects. The Charging Function (CHF) manages charging of services and / or functions. The Network Slice Selection Function (NSSF) selects the Network Slicing Instance (NSI), determines the allowed Network Slice Selection Assistance Information (NSSAI) and sets the AMF to serve the UE. In NR the UE is required to perform serving cell measurements, e.g., reference signal received power (RSRP), reference signal received quality (RSRQ), and / or signal to interference plus noise ratio (SINR), and include these measurements in radio resource control (RRC) Measurement Reports, when the serving cell configuration includes the field servingCellMO set to the measurement object identifier of the particular serving frequency to be reported. These serving cell measurements are serving cell measurementresults, i.e., value or values per cell. In addition, if beam reporting parameters areconfigured for at least one measurement identifier, the UE may also perform beam measurements per beam for the serving cell. Multi-antenna techniques may significantly increase the data rates and reliability of a wireless communication system. For a wireless connection between a single user, such as a UE, and a base station (BS), the performance is in particular improved if both the transmitter and the receiver are equipped with multiple antennas, which results in a Multiple-Input Multiple-Output (MIMO) communication channel. This may be referred to asSingle-User (SU)-MIMO. In the scenario where MIMO techniques are used for thewireless connection between multiple users and the BS, MIMO enables the users to communicate with the base station simultaneously using the same time-frequency resources by spatially separating the users, which further increases the cell capacity. This may be referred to as Multi-User (MU)-MIMO. Note that MU-MIMO may benefit when each UE only has one antenna. The cell capacity can be increased linearly with respect to the number of antennas at the BS side. Due to that, more and more antennas are employed in BS. Such systems and / or related techniques are commonly referred to as massive MIMO. Joint transmission (JT) is one of the distributed MIMO (D-MIMO) techniques that can beapplied in downlink from a network node, e.g., eNB, gNB and access point, to a UE datatransmission, in which a signal is transmitted from multiple spatially distributed transmit / receive points (TRPs) on the network side and is received by the UE. In the framework of 3GPP, JT is categorized into coherent JT (C-JT) and non-coherent JT (NC- JT). For C-JT, a data layer of a Physical Downlink Share Channel (PDSCH) is precoded / beamformed and transmitted jointly over the multiple TRPs in the same time and frequency resource such that the corresponding precoded signals from the multiple TRPs are coherently added / combined at the UE. The precoder at the multiple TRPs contains also co-phasing factors among the TRPs such that the precoded signals have a same phase or in-phase when they arrive at the UE. For this purpose, it is assumed that the network has detailed channel state information (CSI) of the service links between the TRPs and the UE. In addition, prior phase alignment and tight synchronization across the TRPs are needed to achieve coherent combining at the UE. Based on where the CSI is collected / measured and how precoders are calculated, C-JT can be further divided into two categories: codebook based, and reciprocity based. Reciprocity-based C-JT can only be implemented in TDD systems in which uplink channel and downlink channel reciprocity holds. Thanks to channel reciprocity, downlink CSI can be obtained from uplink sounding reference signal (SRS) and downlink PDSCH precoders can be estimated at the gNB.Fig. 1 illustrates a reciprocity-based C-JT system with N>1 TRPs, where each data layerof a PDSCH is precoded and transmitted over N TRPs and a precoder ^^ is used at the all ^ TRPs involved indownlink JT at an interval of ^^^^, and each TRP ^, ^ ∈ {0, 1, ⋯ , ^ − 1}, performs SRSchannel estimates and generate uplink channel estimates The gNB then constructsa downlink channel estimates matrix by concatenating SRS channel estimates from allinvolved TRPs, calculates jointly downlink precoders for all TRPs and transmits adownlink precoded PDSCH signal to the UE. The phase alignment can be negatively impacted by timing and transmit frequency differences between TRPs and can also be impacted by UE movement which introduces Doppler frequencies into the channel. More specifically, a frequency difference between any two TRPs may result in a different rate of phase change over time between the two TRPs. It implies that the phase alignment between TRPs can be out of date quickly due to the frequency differences and thus, frequent phase alignment is needed, which is an issue. Transmit frequency difference between TRPs The radio transmit frequency will drift over time in real systems due to various reasons, such as temperature variations, power supply fluctuations and aging ofcomponents, etc. Periodic frequency calibration is in general needed to know the residualfrequency offset of TRP. The frequency offset is anti-reciprocal, i.e., for a frequency offset∆^^ in downlink, −∆^^ will be observed by an SRS in uplink due to down-converting andup-converting of the signal. As shown in Fig.2, this anti-reciprocal frequency offset isharmful to reciprocity-based C-JT as firstly a phase error of -∅^(^) is included in the uplinkchannel estimates ^^ for TRP ^ hence also in precoder , and secondly PDSCHtransmitted from TRP ^ will get another phase rotation ∅^(^). Thus, the total phase errorwhen PDSCH signal arrives at UE will be 2∅^(^), 0 ≤ ^ < ^.Doppler frequencyWhen a UE travels in around the middle of two TRPs as shown in Fig. 3, the signals fromthe two TRPs, would have different Doppler frequencies ^^^and ^^^, which have a similar effect as transmit frequency errors on CJT. SUMMARY An object of embodiments herein is to handle communication in a communicationnetwork in an efficient and reliable manner. According to an aspect of embodiments herein the object is achieved by a methodperformed by a network node for handling communication of data in a communicationnetwork. The network node determines an uplink channel at each of a plurality of TRPs,based on a received uplink reference signal at the respective TRP. The network nodefurther determines an uplink frequency difference, at each of the plurality of TRPs,between the respective TRP and a reference TRP. The network node furthercompensates the determined uplink channel at each of the plurality of TRPs based on therespective determined uplink frequency difference. According to a further aspect of embodiments herein the object is achieved by amethod performed by a UE for handling communication of data in a communicationnetwork. The UE determines a downlink frequency difference for each of a plurality ofTRPs and a determined reference TRP. The UE further transmits an uplink referencesignal to the plurality of TRPs of a network node.According to another aspect of embodiments herein, the object is achieved byproviding a network node for handling communication of data in a communicationnetwork. The network node is configured to determine an uplink channel at each of theplurality of TRPs, based on a received uplink reference signal at the respective TRP. Thenetwork node is further configured to determine an uplink frequency difference, at each ofthe plurality of TRPs, between the respective TRP and a reference TRP. The networknode is further configured to compensate the determined uplink channel at each of the plurality of TRPs based on the respective determined uplink frequency difference. According to yet another aspect of embodiments herein, the object is achieved by providing a UE for handling communication of data in a communication network. The UE is configured to determine a downlink frequency difference for each of a plurality of TRPs and a determined reference TRP. The UE is further configured to transmit an uplink reference signal to the plurality of TRPs of a network node. It is furthermore provided herein a computer program comprising instructions, which, when executed on at least one processor, cause the at least one processor tocarry out the methods above, as performed by the network node or the UE, respectively. Itis additionally provided herein a computer-readable storage medium, having stored thereon a computer program comprising instructions which, when executed on at leastone processor, cause the at least one processor to carry out the methods above, asperformed by the network node or the UE, respectively.Embodiments herein are based on the realisation that a determined uplinkfrequency difference between a plurality of TRPs and a received reference TRP can beused to compensate a determined uplink channel. BRIEF DESCRIPTION OF THE DRAWINGS Embodiments will now be described in more detail in relation to the enclosed drawings, in which:Fig. 1 is a schematic overview depicting N-TRP reciprocity-based C-JT systems;Fig. 2 is a schematic overview depicting down-converting and upconverting of signal;Fig. 3 is a schematic overview depicting Doppler frequency caused by UE movement;Fig. 4 is a schematic overview depicting a communication network;Fig. 5 is a flowchart depicting a method performed by a network node according toembodiments herein;Fig. 6 is a diagram for frequency difference compensation;Fig. 7 is a diagram illustrating frequency calibration and TRS transmission;Fig. 8 is a diagram depicting a downlink transmit and receive frequency according toembodiments herein;Fig. 9A is a diagram depicting a uplink transmit and receive frequency according toembodiments herein;Fig. 9B is a block diagram depicting an example of PDSCH frequency pre-compensation for CJT over multiple TRPs;Fig. 10 is a flowchart depicting a method performed by a UE according toembodiments herein;Fig.11 is a schematic block diagram illustrating embodiments of a requesting node;Fig.12 is a schematic block diagram illustrating embodiments of a requesting UE;Fig.13 shows an example of a communication system QQ100 in accordance withsome embodiments; Fig.14 shows a UE QQ200 in accordance with some embodiments; Fig.15 shows a network node QQ300 in accordance with some embodiments;Fig.16 is a block diagram of a host QQ400, which may be an embodiment of the hostQQ116 of Figs.11 and 12, in accordance with various aspects described herein;Fig.17 is a block diagram illustrating a virtualization environment QQ500 in whichfunctions implemented by some embodiments may be virtualized; andFig.18 shows a communication diagram of a host QQ602 communicating via a networknode QQ604 with a UE QQ606 over a partially wireless connection in accordance with some embodiments. DETAILED DESCRIPTION Embodiments herein relate to communication networks in general. Fig. 4 is aschematic overview depicting a communication network 1. The communication network1 comprises one or more RANs connected to one or more CNs. The communicationnetwork 1 may use a number of different technologies, such as Wi-Fi, Long Term Evolution (LTE), LTE-Advanced, 5G, Wideband Code Division Multiple Access (WCDMA), Global System for Mobile communications / Enhanced Data rate for GSM Evolution (GSM / EDGE), Worldwide Interoperability for Microwave Access (WiMAX), or Ultra Mobile Broadband (UMB), just to mention a few possible implementations. Embodiments herein relate to recent technology trends that are of particular interest in a 5G context, however, embodiments are applicable also in further development of the existing communicationsystems such as e.g. a WCDMA and or LTE system.In the communication network 1, wireless devices e.g. a UE 10 such as a mobile station, a non-access point (non-AP) station (STA), a STA, a user equipment and / or a wireless terminal, communicate via one or more Access Networks (AN), e.g. RAN, to one or more CNs. It should be understood by the skilled in the art that “UE” is a non-limiting term which means any terminal, wireless communication terminal, user equipment, Machine Type Communication (MTC) device, Device to Device (D2D) terminal, internet of things (IoT) operable device, or node e.g. smart phone, laptop, mobile phone, sensor, relay, mobile tablets or even a small base station capable of communicating using radio communication with a network node within an area served by the network node. The communication network 1 comprises a network node 12, e.g. a radionetwork node, providing e.g. radio coverage over a geographical area, a first servicearea 20 i.e. a first cell, of a radio access technology (RAT), such as NR, LTE, Wi-Fi,WiMAX or similar. The network node 12 may be a transmission and reception point, a computational server, a base station e.g. a network node such as a satellite, a Wireless Local Area Network (WLAN) access point or an Access Point Station (AP STA), an access node, an access controller, a radio base station such as a NodeB, an evolved Node B (eNB, eNodeB), a gNodeB (gNB), a base transceiver station, a baseband unit, an Access Point Base Station, a base station router, a transmission arrangement of a radio base station, a stand-alone access point or any other network unit or node depending e.g. on the radio access technology and terminology used. The network node 12 may alternatively or additionally be a controller node or a packet processing node or similar. The network node 12 may be referred to as source node, source access node or a serving network node wherein the first service area 20 may be referred to as a serving cell, source cell or primary cell, and the network node communicates with the UE 10 in form of DL transmissions to the UE 10 and UL transmissions from the UE 10. The network node 12 may be a target node. The network node 12 may be a distributed node comprising a baseband unit and one or more remote radio units. It should be noted that a service area may be denoted as cell, beam, beam group or similar to define an area of radio coverage. According to embodiments herein the network node 12 determines an uplinkchannel at the plurality of TRPs, based on a received uplink reference signal. The networknode 12 further determines an uplink frequency difference between the plurality of TRPsand a received reference TRP. The network node subsequently compensates thedetermined uplink channel based on the determined uplink frequency difference. The method actions performed by the network node 12 for handlingcommunication of the data, for example, between the UE 10 and the network node 12, inthe communication network 1, according to embodiments herein, will now be describedwith reference to a flowchart depicted in Fig. 5 and a diagram in Fig.6. The actions donot have to be taken in the order stated below but may be taken in any suitable order.Actions performed in some embodiments are marked with dashed boxes. Action 501. The network node 12 may transmit a downlink reference signal from each of theplurality of TRPs, e.g. one or more TRPs, to the UE 10 for frequency informationreporting. The downlink reference signal may be a TRS. The downlink reference signalmay be transmitted periodically. According to some embodiments, different downlinkreference signals may be transmitted from different TRPs. A TRP specific downlinkreference signal (RS) such as a tracking reference signal (TRS) may be configured forand transmitted from each of multiple TRPs. The reference signal may be periodicallytransmitted with a periodicity of T. An example is shown in Fig.7.Action 502. The network node 12 may receive a determined downlink frequency difference for each of the plurality of TRPs from the UE 10, wherein the determined downlink frequency difference is between a respective TRP and a determined reference TRP, and wherein the determined reference TRP is one of the plurality of TRPs. The downlink referencesignal may be transmitted and / or received periodically.The RS to be transmitted on TRP ^ may be frequency upconverted to a nominalcentre frequency ^^ plus a frequency offset / error ∆^^, i.e., = ^^ + ∆^^ before beingtransmitted. This is illustrated in Fig.8.The downlink frequency from TRP ^ at the UE 10 may be shifted by a Dopplerfrequency ^^ ^if the UE is moving, i.e., Action 503 The network node 12 may further receive an identifier of the determined referenceTRP, from the UE 10. A reference TRP may be determined by the UE 10. The referenceTRP may be a TRP with the strongest received RS power or the highest Signal-to-NoiseRatio (SNR) among the TRPs. Let ^ be the index of reference TRP. The downlinkfrequency difference between TRP ^ and ^, i, j ∈ {0,1, … , N − 1} and ^ ≠ ^, may then be The UE 10 may report the reference TRP index ^ and all the frequency differences the gNB.Action 504. The network node 12 may receive an uplink reference signal from the UE 10,wherein the uplink reference signal may be an SRS. Thus, in uplink, the UE may transmitan SRS. The SRS transmit frequency may be a DL frequency estimate, e.g., themeasured downlink frequency of the reference TRP ^, ^^^^^ = ^^ + ∆^^ + ^^^ . TheSRS may be received at all the TRPs as illustrated in Fig.9A.Action 505.The network node 12 then determines an uplink channel at each of the plurality of TRPs,based on a received uplink reference signal at the respective TRP. This enablesestimating and compensating the frequency differences between TRPs due to either e.g. frequency synchronization error and / or different Doppler frequencies The frequency atwhich the SRS may be received at the TRP ^ is ^^^^^plus a Doppler frequency shift Then the SRS signal is frequency down converted to a baseband signal at TRP ^ with asame local oscillator (LO) as in the downlink but a different sign, i.e., −(^^ + ∆^^). Thus,the uplink frequency of SRS baseband signal at TRP ^ may be . Action 506. As the network node 12 has determined an uplink channel at the plurality of TRPs,the network node 12 now determines the uplink frequency difference, at each of theplurality of TRPs, between the respective TRP and a reference TRP. The network node12 thus determines, at each of the plurality of TRPs, the uplink frequency differencebetween the respective TRP and the reference TRP. The reference TRP may be one ofthe plurality of TRPs. The uplink frequency difference between TRP ^ and ^, i, j ∈ {0,1, … , N − 1} and^ ≠ ^, may be estimated based on the SRS as follows: With the above estimated and the UE reported , the radio may transmitfrequency difference between TRP ^ and ^ may be calculated as: The Doppler frequency difference between TRP ^ and ^ may also be calculated as: Action 507. The network node 12 further compensates the determined uplink channel at eachof the plurality of TRPs based on the respective determined uplink frequency difference.With the estimated , the SRS channel estimate for TRP ^, ^ ≠ ^, may becompensated with a frequency shift , i^^^ ^^^^∆^^^^^ ^ .e., ^^^ . The SRS channelestimates for TRP ^ are not compensated. This way, the phase rotation caused by radiofrequency offset in SRS channel estimates of all TRPs becomes the same as that of TRP ^, i.e., the compensated SRS channel estimation at the ^^^TRP is ^^^^^^^^^∆^^^^^ ^= ^ ^^^^^^ ^^^^^,^ (^ = 0,1, Action 508. Furthermore, the network node 12 may calculate a precoder for each of theplurality of TRPs, based on the compensated uplink channel associated to the respectiveTRP. The downlink channel estimation based on the compensated SRS channel estimations may be: The precoder computed based on ^. Since ^^^^^^^^^,^^is a common scaler, it does not have any impact on precoder determination, i.e., the precoderdetermined based on ^ is the same as that based on ^.Action 509. The network node 12 may compensate a downlink channel at each of the pluralityof TRPs, based on the received downlink frequency difference associated to therespective TRP. The downlink channel may be a physical downlink shared channel(PDSCH). With the UE 10 reported ∆^ ^^^^ , PDSCH signal and PDSCH DMRS transmitted onTRP ^, ^ ≠ ^, can be compensated with . Let ^ be a PDSCH or DMRS symbol tobe transmitted with CJT over the multiple TRPs, then ^^^^^^∆^^^^^ ^would be the pre-compensated ^ at TRP ^ (^ ≠ ^). PDSCH signal and PDSCH DMRS on TRP ^ are notcompensated, i.e., ^ would be transmitted on TRP ^. An example is shown in Fig.9B,where a PDSCH symbol ^ is pre-compensated and precoded at each TRP before beingfrequency upconverted and transmitted. In this way, the different phase rotations in the precoded PDSCH signals and PDSCH DMRS signals from different TRPs, caused by different radio frequencyoffsets / errors and different Doppler frequencies associated to different TRPs, may becorrected. The phase rotation of the precoded PDSCH signals and PDSCH DMRS signalsfrom all TRPs may become the same as that of TRP ^ when they reach the UE 10 andthus, the PDSCH transmitted from the multiple TRPs may be coherently combined at theUE 10.The compensated downlink channel at each of the plurality of TRPs may beprecoded with the calculated precoder for the respective TRP. The downlink channel maybe a PDSCH. That is, the pre-compensated PDSCH at each TRP may be precoded with aprecoder associated the TRP before being transmitted to the UE 10.The method actions performed by the UE 10 for handling communication of the data in the communication network 1, according to embodiments herein, will now be described with reference to a flowchart depicted in Fig.10. The actions do not have to betaken in the order stated below but may be taken in any suitable order. Actions performedin some embodiments are marked with dashed boxes. Action 1001The UE 10 may receive a downlink reference signal from each of the plurality ofTRPs of the network node 12. The downlink reference signal may be a TRS.Action 1002The UE 10 may then determine a reference TRP based on a predeterminedcondition. The predetermined condition may be one or more of: a strongest receivedreference signal power and / or a highest SNR determined from the received downlink reference signal. Action 1003. The UE 10 determines the downlink frequency difference for each of the pluralityof TRPs and the determined reference TRP. The determined downlink frequencydifference may be between a respective TRP and the determined reference TRP, andwherein the determined reference TRP may be one of the plurality of TRPs.Action 1004 The UE 10 may transmit the determined downlink frequency difference to the network node 12. Action 1005 The UE 10 may transmit the determined reference TRP to the network node 12. Action 1006. The UE 10 then transmits an uplink reference signal to the plurality of TRPs of thenetwork node 12. The uplink reference signal may be an SRS.Fig. 11 is a block diagram depicting the network node 12 for handlingcommunication of the data in the communication network 1, according to embodimentsherein. The network node 12 may comprise processing circuitry 1101, e.g., one or more processors, configured to perform the methods herein. The source network node 12 may comprise a memory 1105. The memory 1105 comprises one or more units to be used to store data on, such as data packets, indications, messages, network information, configurations, information, TRPs,reference TRPs, frequency information, reference signals, events and applications toperform the methods disclosed herein when being executed, and similar. Furthermore,the network node 12 comprises a network interface 1106 such as comprising atransmitter, a receiver, a transceiver and / or one or more antennas, configured to communicate with other network nodes. The network node 12 and / or the processing circuitry 1101 is configured todetermine the uplink channel at each of the plurality of TRPs, based on the receiveduplink reference signal at the respective TRP. The uplink reference signal may be theSRS. The network node 12 and / or the processing circuitry 1101 is configured todetermine the uplink frequency difference, at each of the plurality of TRPs, between therespective TRP and the reference TRP. The reference TRP may be one of the pluralityof TRPs. The network node 12 and / or the processing circuitry 1101 is configured to compensate the determined uplink channel at each of the plurality of TRPs based on the respective determined uplink frequency difference. The network node 12 and / or the processing circuitry 1101 may be configured totransmit the downlink reference signal from each of the plurality of TRPs, to the UE 10for frequency information reporting. Different downlink reference signals may betransmitted from different TRPs. The downlink reference signal may be transmittedperiodically. The downlink reference signal may be a TRS.The network node 12 and / or the processing circuitry 1101 may be configured to receive the uplink reference signal from the UE 10. The network node 12 and / or the processing circuitry 1101 may be configured to receive the determined downlink frequency difference for each of the plurality of TRPs from the UE 10, wherein the determined downlink frequency difference is between therespective TRP and the determined reference TRP, and wherein the determinedreference TRP is one of the plurality of TRPs. The network node 12 and / or the processing circuitry 1101 may be configured to receive an identifier of the determined reference TRP, from the UE 10. The network node 12 and / or the processing circuitry 1101 may be configured tocalculate the precoder for each of the plurality of TRPs, based on the compensateduplink channel associated to the respective TRP.The network node 12 and / or the processing circuitry 1101 may be configured tocompensate the downlink channel at each of the plurality of TRPs, based on thereceived downlink frequency difference associated to the respective TRP. Thecompensated downlink channel at each of the plurality of TRPs may be precoded withthe calculated precoder for the respective TRP. The downlink channel may be aPDSCH. The methods according to the embodiments described herein for the network node 12 are respectively implemented by means of, e.g., a computer programproduct 1107 or a computer program, comprising instructions, i.e., software codeportions, which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the network node 12. The computer program product 1107 may be stored on a computer-readable storage medium 1108, e.g., a disc, a universal serial bus (USB) stick or similar. The computer-readable storage medium 1108, having stored thereon the computer program product, may comprise the instructions which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the network node 12. In some embodiments, the computer-readable storage medium may be a transitory or a non-transitory computer-readable storage medium. Thus, embodiments herein may disclose the network node 12 for handling communication in a communication network, wherein the network node 12 comprises processing circuitry and a memory, said memory comprising instructions executable bysaid processing circuitry whereby said network node 12 is operative to perform any ofthe methods herein.Fig. 12 is a block diagram depicting the UE 10 for handling communication ofthe data in the communication network 1, according to embodiments herein. The UE 10 may comprise processing circuitry 1201, e.g., one or more processors, configured to perform the methods herein. The UE 10 may comprise a memory 1205. The memory 1205 comprises oneor more units to be used to store data on, such as data packets, indications, messages, network information, configurations, information, TRPs, reference TRPs, frequency information, reference signals, events and applications to perform the methodsdisclosed herein when being executed, and similar. Furthermore, the UE 12 comprisesa network interface 1206 such as comprising a transmitter, a receiver, a transceiverand / or one or more antennas, configured to communicate with other network nodes. The UE 10 and / or the processing circuitry 1201 is configured to determine the downlink frequency difference for each of the plurality of TRPs and the determinedreference TRP. The determined downlink frequency difference may be between arespective TRP and the determined reference TRP, and wherein the determinedreference TRP may be one of the plurality of TRPs. The downlink reference signal maybe the TRS.The UE 10 and / or the processing circuitry 1201 is configured to transmit anuplink reference signal to the plurality of TRPs of the network node 12. The uplinkreference signal may be the SRS.The UE 10 and / or the processing circuitry 1201 may be configured to receive adownlink reference signal from each of the plurality of TRPs of the network node 12.The UE 10 and / or the processing circuitry 1201 may be configured todetermine a reference TRP based on a predetermined condition. The predeterminedcondition may be one or more of: a strongest received reference signal power and / or ahighest SNR determined from the received downlink reference signal.The UE 10 and / or the processing circuitry 1201 may be configured to transmit the determined downlink frequency difference to the network node 12. The UE 10 and / or the processing circuitry 1201 may be configured to transmit the determined reference TRP to the network node 12. The methods according to the embodiments described herein for the UE 10 arerespectively implemented by means of, e.g., a computer program product 1207 or acomputer program, comprising instructions, i.e., software code portions, which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the UE 10. The computer program product1207 may be stored on a computer-readable storage medium 1208, e.g., a disc, auniversal serial bus (USB) stick or similar. The computer-readable storage medium 1208, having stored thereon the computer program product, may comprise the instructions which, when executed on at least one processor, cause the at least one processor to carry out the actions described herein, as performed by the network node 12. In some embodiments, the computer-readable storage medium may be a transitory or a non-transitory computer-readable storage medium. Thus, embodiments hereinmay disclose the UE 10 for handling communication in a communication network,wherein the network node 12 comprises processing circuitry and a memory, said memory comprising instructions executable by said processing circuitry whereby saidUE 10 is operative to perform any of the methods herein.In some embodiments a more general term “network node” or “radio network node” is used and it can correspond to any type of radio-network node or any network node, which communicates with a UE and / or with another network node. In some embodiments the non-limiting term wireless device or UE is used and it refers to any type of wireless device communicating with a network node and / or with another wireless device in a cellular or mobile communication system. Examples of UE are target device, device to device (D2D) UE, proximity capable UE (aka ProSe UE), IoT capable device, machine type UE or UE capable of machine to machine (M2M) communication, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles etc. Embodiments are applicable to any RAT or multi-RAT systems, where the wireless device receives and / or transmit signals (e.g. data) e.g.6G, NR, Wi-Fi, LTE, LTE-Advanced, WCDMA, Global System for Mobile communications / enhanced Data rate for GSM Evolution (GSM / EDGE), Worldwide Interoperability for Microwave Access (WiMax), or Ultra Mobile Broadband (UMB), just to mention a few possible implementations. As will be readily understood by those familiar with communications design, that functions means or circuits may be implemented using digital logic and / or one or more microcontrollers, microprocessors, or other digital hardware. In some embodiments, several or all of the various functions may be implemented together, such as in a single application-specific integrated circuit (ASIC), or in two or more separate devices with appropriate hardware and / or software interfaces between them. Several of the functions may be implemented on a processor shared with other functional components of a wireless device or network node, for example. Alternatively, several of the functional elements of the processing means discussed may be provided through the use of dedicated hardware, while others are provided with hardware for executing software, in association with the appropriate software or firmware. Thus, the term “processor” or “controller” as used herein does not exclusively refer to hardware capable of executing software and may implicitly include, without limitation, digital signal processor (DSP) hardware and / or program or application data. Other hardware, conventional and / or custom, may also be included. Designers of communications devices will appreciate the cost, performance, and maintenance trade-offs inherent in these design choices. Any appropriate steps, methods, features, functions, or benefits disclosed herein may be performed through one or more functional units or modules of one or more virtual apparatuses. Each virtual apparatus may comprise a number of these functional units. These functional units may be implemented via processing circuitry, which may include one or more microprocessor or microcontrollers, as well as other digital hardware, which may include digital signal processors (DSPs), special-purpose digital logic, and the like. The processing circuitry may be configured to execute program code stored in memory, which may include one or several types of memory such as read-only memory (ROM), random-access memory (RAM), cache memory, flash memory devices, optical storage devices, etc. Program code stored in memory includes program instructions for executing one or more telecommunications and / or data communications protocols as well as instructions for carrying out one or more of the techniques described herein. In some implementations, the processing circuitry may be used to cause the respective functional unit to perform corresponding functions according one or more embodiments of the present disclosure. Fig. 13 shows an example of a communication system QQ100 in accordance withsome embodiments. In the example, the communication system QQ100 includes a telecommunication network QQ102 that includes an access network QQ104, such as a radio access network (RAN), and a core network QQ106, which includes one or more core network nodes QQ108. The access network QQ104 includes one or more access network nodes, such as network nodes QQ110a and QQ110b (one or more of which may be generally referred to as network nodes QQ110) being examples of the network node 12, or any other similar 3rd Generation Partnership Project (3GPP) access nodes or non-3GPP access points. Moreover, as will be appreciated by those of skill in the art, a network node, being examples of the entities herein, is not necessarily limited to an implementation in which a radio portion and a baseband portion are supplied and integrated by a single vendor. Thus, it will be understood that network nodes include disaggregated implementations or portions thereof. For example, in some embodiments, the telecommunication network QQ102 includes one or more Open-RAN (ORAN) network nodes. An ORAN network node is a node in the telecommunication network QQ102 that supports an ORAN specification (e.g., a specification published by the O-RAN Alliance, or any similar organization) and may operate alone or together with other nodes to implement one or more functionalities of any node in the telecommunication network QQ102, including one or more network nodes QQ110 and / or core network nodes QQ108. Examples of an ORAN network node include an open radio unit (O-RU), an open distributed unit (O-DU), an open central unit (O-CU), including an O-CU control plane (O- CU-CP) or an O-CU user plane (O-CU-UP), a RAN intelligent controller (near-real time or non-real time) hosting software or software plug-ins, such as a near-real time control application (e.g., xApp) or a non-real time control application (e.g., rApp), or any combination thereof (the adjective “open” designating support of an ORAN specification). The network node may support a specification by, for example, supporting an interface defined by the ORAN specification, such as an A1, F1, W1, E1, E2, X2, Xn interface, an open fronthaul user plane interface, or an open fronthaul management plane interface. Moreover, an ORAN access node may be a logical node in a physical node. Furthermore, an ORAN network node may be implemented in a virtualization environment (described further below) in which one or more network functions are virtualized. For example, the virtualization environment may include an O-Cloud computing platform orchestrated by a Service Management and Orchestration Framework via an O-2 interface defined by the O-RAN Alliance or comparable technologies. The network nodes QQ110 facilitate direct or indirect connection of the UE 10, such as by connecting UEs QQ112a, QQ112b, QQ112c, and QQ112d (one or more of which may be generally referred to as UEs QQ112) to the core network QQ106 over one or more wireless connections. Example wireless communications over a wireless connection include transmitting and / or receiving wireless signals using electromagnetic waves, radio waves, infrared waves, and / or other types of signals suitable for conveying information without the use of wires, cables, or other material conductors. Moreover, in different embodiments, the communication system QQ100 may include any number of wired or wireless networks, network nodes, UEs, and / or any other components or systems that may facilitate or participate in the communication of data and / or signals whether via wired or wireless connections. The communication system QQ100 may include and / or interface with any type of communication, telecommunication, data, cellular, radio network, and / or other similar type of system. The UEs QQ112 may be any of a wide variety of communication devices, including wireless devices arranged, configured, and / or operable to communicate wirelessly with the network nodes QQ110 and other communication devices. Similarly, the networknodes QQ110 are arranged, capable, configured, and / or operable to communicate directlyor indirectly with the UEs QQ112 and / or with other network nodes or equipment in the telecommunication network QQ102 to enable and / or provide network access, such as wireless network access, and / or to perform other functions, such as administration in the telecommunication network QQ102. In the depicted example, the core network QQ106 connects the network nodes QQ110 to one or more hosts, such as host QQ116. These connections may be direct or indirect via one or more intermediary networks or devices. In other examples, network nodes may be directly coupled to hosts. The core network QQ106 includes one more core network nodes (e.g., core network node QQ108) such as network node 15 that are structured with hardware and software components. Features of these components may be substantially similar to those described with respect to the UEs, network nodes, and / or hosts, such that the descriptions thereof are generally applicable to the corresponding components of the core network node QQ108. Example core network nodes include functions of one or more of a Mobile Switching Center (MSC), Mobility Management Entity (MME), Home Subscriber Server (HSS), Access and Mobility Management Function (AMF), Session Management Function (SMF), Authentication Server Function (AUSF), Subscription Identifier De-concealing function (SIDF), Unified Data Management (UDM), Security Edge Protection Proxy (SEPP), Network Exposure Function (NEF), and / or a User Plane Function (UPF). The host QQ116 may be under the ownership or control of a service provider other than an operator or provider of the access network QQ104 and / or the telecommunication network QQ102, and may be operated by the service provider or on behalf of the service provider. The host QQ116 may host a variety of applications to provide one or more service. Examples of such applications include live and pre-recorded audio / video content, data collection services such as retrieving and compiling data on various ambient conditions detected by a plurality of UEs, analytics functionality, social media, functions for controlling or otherwise interacting with remote devices, functions for an alarm and surveillance center, or any other such function performed by a server. As a whole, the communication system QQ100 of Fig.13 enables connectivitybetween the UEs, network nodes, and hosts. In that sense, the communication system may be configured to operate according to predefined rules or procedures, such as specific standards that include, but are not limited to: Global System for Mobile Communications (GSM); Universal Mobile Telecommunications System (UMTS); Long Term Evolution (LTE), and / or other suitable 2G, 3G, 4G, 5G standards, or any applicable future generation standard (e.g., 6G); wireless local area network (WLAN) standards, such as the Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards (WiFi); and / or any other appropriate wireless communication standard, such as the Worldwide Interoperability for Microwave Access (WiMax), Bluetooth, Z-Wave, Near Field Communication (NFC) ZigBee, LiFi, and / or any low-power wide-area network (LPWAN) standards such as LoRa and Sigfox. In some examples, the telecommunication network QQ102 is a cellular network that implements 3GPP standardized features. Accordingly, the telecommunications network QQ102 may support network slicing to provide different logical networks to different devices that are connected to the telecommunication network QQ102. For example, the telecommunications network QQ102 may provide Ultra Reliable Low Latency Communication (URLLC) services to some UEs, while providing Enhanced Mobile Broadband (eMBB) services to other UEs, and / or Massive Machine Type Communication (mMTC) / Massive IoT services to yet further UEs. In some examples, the UEs QQ112 are configured to transmit and / or receive information without direct human interaction. For instance, a UE may be designed to transmit information to the access network QQ104 on a predetermined schedule, when triggered by an internal or external event, or in response to requests from the accessnetwork QQ104. Additionally, a UE may be configured for operating in single- or multi-RAT or multi-standard mode. For example, a UE may operate with any one or combination of Wi-Fi, NR (New Radio) and LTE, i.e. being configured for multi-radio dual connectivity (MR-DC), such as E-UTRAN (Evolved-UMTS Terrestrial Radio AccessNetwork) New Radio – Dual Connectivity (EN-DC).In the example, the hub QQ114 communicates with the access network QQ104 to facilitate indirect communication between one or more UEs (e.g., UE QQ112c and / or QQ112d) and network nodes (e.g., network node QQ110b). In some examples, the hub QQ114 may be a controller, router, content source and analytics, or any of the other communication devices described herein regarding UEs. For example, the hub QQ114 may be a broadband router enabling access to the core network QQ106 for the UEs. As another example, the hub QQ114 may be a controller that sends commands or instructions to one or more actuators in the UEs. Commands or instructions may be received from the UEs, network nodes QQ110, or by executable code, script, process, or other instructions in the hub QQ114. As another example, the hub QQ114 may be a data collector that acts as temporary storage for UE data and, in some embodiments, may perform analysis or other processing of the data. As another example, the hub QQ114 may be a content source. For example, for a UE that is a VR headset, display, loudspeaker or other media delivery device, the hub QQ114 may retrieve VR assets, video, audio, or other media or data related to sensory information via a network node, which the hub QQ114 then provides to the UE either directly, after performing local processing, and / or after adding additional local content. In still another example, the hub QQ114 acts as a proxy server or orchestrator for the UEs, in particular if one or more of the UEs are low energy IoT devices. The hub QQ114 may have a constant / persistent or intermittent connection to the network node QQ110b. The hub QQ114 may also allow for a different communication scheme and / or schedule between the hub QQ114 and UEs (e.g., UE QQ112c and / orQQ112d), and between the hub QQ114 and the core network QQ106. In other examples,the hub QQ114 is connected to the core network QQ106 and / or one or more UEs via a wired connection. Moreover, the hub QQ114 may be configured to connect to an M2M service provider over the access network QQ104 and / or to another UE over a direct connection. In some scenarios, UEs may establish a wireless connection with the networknodes QQ110 while still connected via the hub QQ114 via a wired or wireless connection.In some embodiments, the hub QQ114 may be a dedicated hub – that is, a hub whoseprimary function is to route communications to / from the UEs from / to the network nodeQQ110b. In other embodiments, the hub QQ114 may be a non-dedicated hub – that is, adevice which is capable of operating to route communications between the UEs and network node QQ110b, but which is additionally capable of operating as a communication start and / or end point for certain data channels. Fig. 14 shows a UE QQ200 in accordance with some embodiments. As usedherein, a UE refers to a device capable, configured, arranged and / or operable to communicate wirelessly with network nodes and / or other UEs. Examples of a UE include, but are not limited to, a smart phone, mobile phone, cell phone, voice over IP (VoIP) phone, wireless local loop phone, desktop computer, personal digital assistant (PDA), wireless cameras, gaming console or device, music storage device, playback appliance, wearable terminal device, wireless endpoint, mobile station, tablet, laptop, laptop- embedded equipment (LEE), laptop-mounted equipment (LME), smart device, wireless customer-premise equipment (CPE), vehicle, vehicle-mounted or vehicle embedded / integrated wireless device, etc. Other examples include any UE identified by the 3rd Generation Partnership Project (3GPP), including a narrow band internet of things (NB-IoT) UE, a machine type communication (MTC) UE, and / or an enhanced MTC (eMTC) UE. A UE may support device-to-device (D2D) communication, for example by implementing a 3GPP standard for sidelink communication, Dedicated Short-Range Communication (DSRC), vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), or vehicle-to-everything (V2X). In other examples, a UE may not necessarily have a user in the sense of a human user who owns and / or operates the relevant device. Instead, a UE may represent a device that is intended for sale to, or operation by, a human user but which may not, or which may not initially, be associated with a specific human user (e.g., a smart sprinkler controller). Alternatively, a UE may represent a device that is not intended for sale to, or operation by, an end user but which may be associated with or operated for the benefit of a user (e.g., a smart power meter). The UE QQ200 includes processing circuitry QQ202 that is operatively coupled via a bus QQ204 to an input / output interface QQ206, a power source QQ208, a memory QQ210, a communication interface QQ212, and / or any other component, or any combination thereof. Certain UEs may utilize all or a subset of the components shown inFig. 14. The level of integration between the components may vary from one UE toanother UE. Further, certain UEs may contain multiple instances of a component, such as multiple processors, memories, transceivers, transmitters, receivers, etc. The processing circuitry QQ202 is configured to process instructions and data and may be configured to implement any sequential state machine operative to execute instructions stored as machine-readable computer programs in the memory QQ210. Theprocessing circuitry QQ202 may be implemented as one or more hardware-implementedstate machines (e.g., in discrete logic, field-programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), etc.); programmable logic together with appropriate firmware; one or more stored computer programs, general-purpose processors, such as a microprocessor or digital signal processor (DSP), together with appropriate software; or any combination of the above. For example, the processing circuitry QQ202 may include multiple central processing units (CPUs). In the example, the input / output interface QQ206 may be configured to provide an interface or interfaces to an input device, output device, or one or more input and / or output devices. Examples of an output device include a speaker, a sound card, a video card, a display, a monitor, a printer, an actuator, an emitter, a smartcard, another output device, or any combination thereof. An input device may allow a user to capture information into the UE QQ200. Examples of an input device include a touch-sensitive or presence-sensitive display, a camera (e.g., a digital camera, a digital video camera, a web camera, etc.), a microphone, a sensor, a mouse, a trackball, a directional pad, a trackpad, a scroll wheel, a smartcard, and the like. The presence-sensitive display may include a capacitive or resistive touch sensor to sense input from a user. A sensor may be, for instance, an accelerometer, a gyroscope, a tilt sensor, a force sensor, a magnetometer, an optical sensor, a proximity sensor, a biometric sensor, etc., or any combination thereof. An output device may use the same type of interface port as an input device. For example, a Universal Serial Bus (USB) port may be used to provide an input device and an output device. In some embodiments, the power source QQ208 is structured as a battery or battery pack. Other types of power sources, such as an external power source (e.g., an electricity outlet), photovoltaic device, or power cell, may be used. The power source QQ208 may further include power circuitry for delivering power from the power source QQ208 itself, and / or an external power source, to the various parts of the UE QQ200 via input circuitry or an interface such as an electrical power cable. Delivering power may be, for example, for charging of the power source QQ208. Power circuitry may perform any formatting, converting, or other modification to the power from the power source QQ208 to make the power suitable for the respective components of the UE QQ200 to which power is supplied. The memory QQ210 may be or be configured to include memory such as random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasableprogrammable read-only memory (EEPROM), magnetic disks, optical disks, hard disks,removable cartridges, flash drives, and so forth. In one example, the memory QQ210 includes one or more application programs QQ214, such as an operating system, web browser application, a widget, gadget engine, or other application, and corresponding data QQ216. The memory QQ210 may store, for use by the UE QQ200, any of a variety of various operating systems or combinations of operating systems. The memory QQ210 may be configured to include a number of physical drive units, such as redundant array of independent disks (RAID), flash memory, USB flash drive, external hard disk drive, thumb drive, pen drive, key drive, high-density digital versatile disc (HD-DVD) optical disc drive, internal hard disk drive, Blu-Ray optical disc drive, holographic digital data storage (HDDS) optical disc drive, external mini-dual in-line memory module (DIMM), synchronous dynamic random access memory (SDRAM), external micro-DIMM SDRAM, smartcard memory such as tamper resistant module in the form of a universal integrated circuit card (UICC) including one or more subscriber identity modules (SIMs), such as a USIM and / or ISIM, other memory, or any combination thereof. The UICC may for example be an embedded UICC (eUICC), integrated UICC (iUICC) or a removable UICC commonly known as ‘SIM card.’ The memory QQ210 may allow the UE QQ200 to access instructions, application programs and the like, stored on transitory or non-transitory memory media, to off-load data, or to upload data. An article of manufacture, such as one utilizing a communication system may be tangibly embodied as or in the memory QQ210, which may be or comprise a device-readable storage medium. The processing circuitry QQ202 may be configured to communicate with an access network or other network using the communication interface QQ212. The communication interface QQ212 may comprise one or more communication subsystems and may include or be communicatively coupled to an antenna QQ222. The communication interface QQ212 may include one or more transceivers used to communicate, such as by communicating with one or more remote transceivers of another device capable of wireless communication (e.g., another UE or a network node in an access network). Each transceiver may include a transmitter QQ218 and / or a receiver QQ220 appropriate to provide network communications (e.g., optical, electrical, frequency allocations, and so forth). Moreover, the transmitter QQ218 and receiver QQ220 may be coupled to one or more antennas (e.g., antenna QQ222) and may share circuit components, software or firmware, or alternatively be implemented separately. In the illustrated embodiment, communication functions of the communication interface QQ212 may include cellular communication, Wi-Fi communication, LPWAN communication, data communication, voice communication, multimedia communication, short-range communications such as Bluetooth, near-field communication, location-based communication such as the use of the global positioning system (GPS) to determine a location, another like communication function, or any combination thereof. Communications may be implemented in according to one or more communication protocols and / or standards, such as IEEE 802.11, Code Division Multiplexing Access (CDMA), WCDMA, GSM, LTE, NR, UMTS, WiMax, Ethernet, transmission control protocol / internet protocol (TCP / IP), synchronous optical networking (SONET), Asynchronous Transfer Mode (ATM), QUIC, Hypertext Transfer Protocol (HTTP), and so forth. Regardless of the type of sensor, a UE may provide an output of data captured by its sensors, through its communication interface QQ212, via a wireless connection to a network node. Data captured by sensors of a UE can be communicated through a wireless connection to a network node via another UE. The output may be periodic (e.g.,once every 15 minutes if it reports the sensed temperature), random (e.g., to even out theload from reporting from several sensors), in response to a triggering event (e.g., when moisture is detected an alert is sent), in response to a request (e.g., a user initiated request), or a continuous stream (e.g., a live video feed of a patient). As another example, a UE comprises an actuator, a motor, or a switch, related to a communication interface configured to receive wireless input from a network node via a wireless connection. In response to the received wireless input the states of the actuator, the motor, or the switch may change. For example, the UE may comprise a motor that adjusts the control surfaces or rotors of a drone in flight according to the received input or to a robotic arm performing a medical procedure according to the received input. A UE, when in the form of an Internet of Things (IoT) device, may be a device for use in one or more application domains, these domains comprising, but not limited to, city wearable technology, extended industrial application and healthcare. Non-limiting examples of such an IoT device are a device which is or which is embedded in: a connected refrigerator or freezer, a TV, a connected lighting device, an electricity meter, a robot vacuum cleaner, a voice controlled smart speaker, a home security camera, a motion detector, a thermostat, a smoke detector, a door / window sensor, a flood / moisture sensor, an electrical door lock, a connected doorbell, an air conditioning system like a heat pump, an autonomous vehicle, a surveillance system, a weather monitoring device, a vehicle parking monitoring device, an electric vehicle charging station, a smart watch, a fitness tracker, a head-mounted display for Augmented Reality (AR) or Virtual Reality (VR), a wearable for tactile augmentation or sensory enhancement, a water sprinkler, ananimal- or item-tracking device, a sensor for monitoring a plant or animal, an industrialrobot, an Unmanned Aerial Vehicle (UAV), and any kind of medical device, like a heart rate monitor or a remote controlled surgical robot. A UE in the form of an IoT device comprises circuitry and / or software in dependence of the intended application of the IoT device in addition to other components as described in relation to the UE QQ200 shown inFig. 14.As yet another specific example, in an IoT scenario, a UE may represent a machine or other device that performs monitoring and / or measurements, and transmits the results of such monitoring and / or measurements to another UE and / or a network node. The UE may in this case be an M2M device, which may in a 3GPP context be referred to as an MTC device. As one particular example, the UE may implement the 3GPP NB-IoT standard. In other scenarios, a UE may represent a vehicle, such as a car, a bus, a truck, a ship and an airplane, or other equipment that is capable of monitoring and / or reporting on its operational status or other functions associated with its operation. In practice, any number of UEs may be used together with respect to a single use case. For example, a first UE might be or be integrated in a drone and provide the drone’s speed information (obtained through a speed sensor) to a second UE that is a remote controller operating the drone. When the user makes changes from the remote controller, the first UE may adjust the throttle on the drone (e.g. by controlling an actuator) to increase or decrease the drone’s speed. The first and / or the second UE can also include more than one of the functionalities described above. For example, a UE might comprise the sensor and the actuator, and handle communication of data for both the speed sensor and the actuators. Fig. 15 shows a network node QQ300 in accordance with some embodiments. Asused herein, network node refers to equipment capable, configured, arranged and / or operable to communicate directly or indirectly with a UE and / or with other network nodes or equipment, in a telecommunication network. Examples of network nodes include, but are not limited to, access points (APs) (e.g., radio access points), base stations (BSs) (e.g., radio base stations, Node Bs, evolved Node Bs (eNBs) and NR NodeBs (gNBs)), O- RAN nodes or components of an O-RAN node (e.g., O-RU, O-DU, O-CU). Base stations may be categorized based on the amount of coverage they provide (or, stated differently, their transmit power level) and so, depending on the provided amount of coverage, may be referred to as femto base stations, pico base stations, micro base stations, or macro base stations. A base station may be a relay node or a relay donor node controlling a relay. A network node may also include one or more (or all) parts of a distributed radio base station such as centralized digital units, distributed units (e.g., in an O-RAN access node) and / or remote radio units (RRUs), sometimes referred to as Remote Radio Heads (RRHs). Such remote radio units may or may not be integrated with an antenna as an antenna integrated radio. Parts of a distributed radio base station may also be referred to as nodes in a distributed antenna system (DAS). Other examples of network nodes include multiple transmission point (multi-TRP) 5G access nodes, multi-standard radio (MSR) equipment such as MSR BSs, network controllers such as radio network controllers (RNCs) or base station controllers (BSCs), base transceiver stations (BTSs), transmission points, transmission nodes, multi- cell / multicast coordination entities (MCEs), Operation and Maintenance (O&M) nodes, Operations Support System (OSS) nodes, Self-Organizing Network (SON) nodes, positioning nodes (e.g., Evolved Serving Mobile Location Centers (E-SMLCs)), and / or Minimization of Drive Tests (MDTs). The network node QQ300 includes a processing circuitry QQ302, a memory QQ304, a communication interface QQ306, and a power source QQ308. The network node QQ300 may be composed of multiple physically separate components (e.g., a NodeB component and a RNC component, or a BTS component and a BSC component, etc.), which may each have their own respective components. In certain scenarios in which the network node QQ300 comprises multiple separate components (e.g., BTS and BSC components), one or more of the separate components may be shared among several network nodes. For example, a single RNC may control multiple NodeBs. In sucha scenario, each unique NodeB and RNC pair, may in some instances be considered asingle separate network node. In some embodiments, the network node QQ300 may be configured to support multiple radio access technologies (RATs). In such embodiments, some components may be duplicated (e.g., separate memory QQ304 for different RATs) and some components may be reused (e.g., a same antenna QQ310 may be shared by different RATs). The network node QQ300 may also include multiple sets of the various illustrated components for different wireless technologies integrated into network node QQ300, for example GSM, WCDMA, LTE, NR, WiFi, Zigbee, Z-wave, LoRaWAN, Radio Frequency Identification (RFID) or Bluetooth wireless technologies. These wireless technologies may be integrated into the same or different chip or set of chips and other components within network node QQ300. The processing circuitry QQ302 may comprise a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application-specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or combination of hardware, software and / or encoded logic operable to provide, either alone or in conjunction with other network node QQ300 components, such as the memory QQ304, to provide network node QQ300 functionality. In some embodiments, the processing circuitry QQ302 includes a system on a chip (SOC). In some embodiments, the processing circuitry QQ302 includes one or more of radio frequency (RF) transceiver circuitry QQ312 and baseband processing circuitry QQ314. In some embodiments, the radio frequency (RF) transceiver circuitry QQ312 and the baseband processing circuitry QQ314 may be on separate chips (or sets of chips), boards, or units, such as radio units and digital units. In alternative embodiments, part or all of RF transceiver circuitry QQ312 and baseband processing circuitry QQ314 may be on the same chip or set of chips, boards, or units. The memory QQ304 may comprise any form of volatile or non-volatile computer- readable memory including, without limitation, persistent storage, solid-state memory, remotely mounted memory, magnetic media, optical media, random access memory(RAM), read-only memory (ROM), mass storage media (for example, a hard disk),removable storage media (for example, a flash drive, a Compact Disk (CD) or a Digital Video Disk (DVD)), and / or any other volatile or non-volatile, non-transitory device- readable and / or computer-executable memory devices that store information, data, and / or instructions that may be used by the processing circuitry QQ302. The memory QQ304 may store any suitable instructions, data, or information, including a computer program, software, an application including one or more of logic, rules, code, tables, and / or other instructions capable of being executed by the processing circuitry QQ302 and utilized by the network node QQ300. The memory QQ304 may be used to store any calculations made by the processing circuitry QQ302 and / or any data received via the communication interface QQ306. In some embodiments, the processing circuitry QQ302 and memory QQ304 is integrated. The communication interface QQ306 is used in wired or wireless communication of signalling and / or data between a network node, access network, and / or UE. As illustrated, the communication interface QQ306 comprises port(s) / terminal(s) QQ316 to send and receive data, for example to and from a network over a wired connection. The communication interface QQ306 also includes radio front-end circuitry QQ318 that may be coupled to, or in certain embodiments a part of, the antenna QQ310. Radio front-end circuitry QQ318 comprises filters QQ320 and amplifiers QQ322. The radio front-end circuitry QQ318 may be connected to an antenna QQ310 and processing circuitry QQ302. The radio front-end circuitry may be configured to condition signals communicated between antenna QQ310 and processing circuitry QQ302. The radio front-end circuitry QQ318 may receive digital data that is to be sent out to other network nodes or UEs via a wireless connection. The radio front-end circuitry QQ318 may convert the digital data into a radio signal having the appropriate channel and bandwidth parameters using a combination of filters QQ320 and / or amplifiers QQ322. The radio signal may then be transmitted via the antenna QQ310. Similarly, when receiving data, the antenna QQ310 may collect radio signals which are then converted into digital data by the radio front-end circuitry QQ318. The digital data may be passed to the processing circuitry QQ302. In other embodiments, the communication interface may comprise different components and / or different combinations of components. In certain alternative embodiments, the network node QQ300 does not include separate radio front-end circuitry QQ318, instead, the processing circuitry QQ302 includes radio front-end circuitry and is connected to the antenna QQ310. Similarly, in some embodiments, all or some of the RF transceiver circuitry QQ312 is part of the communication interface QQ306. In still other embodiments, the communication interface QQ306 includes one or more ports or terminals QQ316, the radio front-end circuitry QQ318, and the RF transceiver circuitry QQ312, as part of a radio unit (not shown), and the communication interface QQ306 communicates with the baseband processing circuitry QQ314, which is part of a digital unit (not shown). The antenna QQ310 may include one or more antennas, or antenna arrays, configured to send and / or receive wireless signals. The antenna QQ310 may be coupled to the radio front-end circuitry QQ318 and may be any type of antenna capable of transmitting and receiving data and / or signals wirelessly. In certain embodiments, the antenna QQ310 is separate from the network node QQ300 and connectable to the network node QQ300 through an interface or port. The antenna QQ310, communication interface QQ306, and / or the processing circuitry QQ302 may be configured to perform any receiving operations and / or certain obtaining operations described herein as being performed by the network node. Any information, data and / or signals may be received from a UE, another network node and / or any other network equipment. Similarly, the antenna QQ310, the communication interface QQ306, and / or the processing circuitry QQ302 may be configured to perform any transmitting operations described herein as being performed by the network node. Any information, data and / or signals may be transmitted to a UE, another network node and / or any other network equipment. The power source QQ308 provides power to the various components of network node QQ300 in a form suitable for the respective components (e.g., at a voltage and current level needed for each respective component). The power source QQ308 may further comprise, or be coupled to, power management circuitry to supply the components of the network node QQ300 with power for performing the functionality described herein. For example, the network node QQ300 may be connectable to an external power source (e.g., the power grid, an electricity outlet) via an input circuitry or interface such as an electrical cable, whereby the external power source supplies power to power circuitry of the power source QQ308. As a further example, the power source QQ308 may comprise a source of power in the form of a battery or battery pack which is connected to, or integrated in, power circuitry. The battery may provide backup power should the external power source fail. Embodiments of the network node QQ300 may include additional componentsbeyond those shown in Fig.15 for providing certain aspects of the network node’sfunctionality, including any of the functionality described herein and / or any functionality necessary to support the subject matter described herein. For example, the network node QQ300 may include user interface equipment to allow input of information into the network node QQ300 and to allow output of information from the network node QQ300. This may allow a user to perform diagnostic, maintenance, repair, and other administrative functions for the network node QQ300. Fig. 16 is a block diagram of a host QQ400, which may be an embodiment of thehost QQ116 of Fig.13, in accordance with various aspects described herein. As usedherein, the host QQ400 may be or comprise various combinations hardware and / or software, including a standalone server, a blade server, a cloud-implemented server, a distributed server, a virtual machine, container, or processing resources in a server farm. The host QQ400 may provide one or more services to one or more UEs. The host QQ400 includes processing circuitry QQ402 that is operatively coupled via a bus QQ404 to an input / output interface QQ406, a network interface QQ408, a power source QQ410, and a memory QQ412. Other components may be included in other embodiments. Features of these components may be substantially similar to thosedescribed with respect to the devices of previous figures, such as Figs.14 and 15, suchthat the descriptions thereof are generally applicable to the corresponding components of host QQ400. The memory QQ412 may include one or more computer programs including one or more host application programs QQ414 and data QQ416, which may include user data, e.g., data generated by a UE for the host QQ400 or data generated by the host QQ400 for a UE. Embodiments of the host QQ400 may utilize only a subset or all of the components shown. The host application programs QQ414 may be implemented in a container-based architecture and may provide support for video codecs (e.g., Versatile Video Coding (VVC), High Efficiency Video Coding (HEVC), Advanced Video Coding (AVC), MPEG, VP9) and audio codecs (e.g., FLAC, Advanced Audio Coding (AAC), MPEG, G.711), including transcoding for multiple different classes, types, or implementations of UEs (e.g., handsets, desktop computers, wearable display systems, heads-up display systems). The host application programs QQ414 may also provide for user authentication and licensing checks and may periodically report health, routes, and content availability to a central node, such as a device in or on the edge of a core network. Accordingly, the host QQ400 may select and / or indicate a different host for over-the-top services for a UE. The host application programs QQ414 may support various protocols, such as the HTTP Live Streaming (HLS) protocol, Real-Time Messaging Protocol (RTMP), Real-Time Streaming Protocol (RTSP), Dynamic Adaptive Streaming over HTTP (MPEG-DASH), etc. Fig. 17 is a block diagram illustrating a virtualization environment QQ500 in whichfunctions implemented by some embodiments may be virtualized. In the present context, virtualizing means creating virtual versions of apparatuses or devices which may include virtualizing hardware platforms, storage devices and networking resources. As used herein, virtualization can be applied to any device described herein, or components thereof, and relates to an implementation in which at least a portion of the functionality is implemented as one or more virtual components. Some or all of the functions described herein may be implemented as virtual components executed by one or more virtual machines (VMs) implemented in one or more virtual environments QQ500 hosted by one or more of hardware nodes, such as a hardware computing device that operates as a network node, UE, core network node, or host. Further, in embodiments in which the virtual node does not require radio connectivity (e.g., a core network node or host), then the node may be entirely virtualized. In some embodiments, the virtualization environment QQ500 includes components defined by the O-RAN Alliance, such as an O- Cloud environment orchestrated by a Service Management and Orchestration Framework via an O-2 interface. Applications QQ502 (which may alternatively be called software instances, virtual appliances, network functions, virtual nodes, virtual network functions, etc.) are run in the virtualization environment Q400 to implement some of the features, functions, and / or benefits of some of the embodiments disclosed herein. Hardware QQ504 includes processing circuitry, memory that stores software and / or instructions executable by hardware processing circuitry, and / or other hardware devices as described herein, such as a network interface, input / output interface, and so forth. Software may be executed by the processing circuitry to instantiate one or more virtualization layers QQ506 (also referred to as hypervisors or virtual machine monitors (VMMs)), provide VMs QQ508a and QQ508b (one or more of which may be generally referred to as VMs QQ508), and / or perform any of the functions, features and / or benefits described in relation with some embodiments described herein. The virtualization layer QQ506 may present a virtual operating platform that appears like networking hardware to the VMs QQ508. The VMs QQ508 comprise virtual processing, virtual memory, virtual networking or interface and virtual storage, and may be run by a corresponding virtualization layer QQ506. Different embodiments of the instance of a virtual appliance QQ502 may be implemented on one or more of VMs QQ508, and the implementations may be made in different ways. Virtualization of the hardware is in some contexts referred to as network function virtualization (NFV). NFV may be used to consolidate many network equipment types onto industry standard high volume server hardware, physical switches, and physical storage, which can be located in data centers, and customer premise equipment. In the context of NFV, a VM QQ508 may be a software implementation of a physical machine that runs programs as if they were executing on a physical, non-virtualized machine. Each of the VMs QQ508, and that part of hardware QQ504 that executes that VM, be it hardware dedicated to that VM and / or hardware shared by that VM with others of the VMs, forms separate virtual network elements. Still in the context of NFV, a virtual network function is responsible for handling specific network functions that run in one or more VMs QQ508 on top of the hardware QQ504 and corresponds to the application QQ502. Hardware QQ504 may be implemented in a standalone network node with generic or specific components. Hardware QQ504 may implement some functions via virtualization. Alternatively, hardware QQ504 may be part of a larger cluster of hardware (e.g. such as in a data center or CPE) where many hardware nodes work together andare managed via management and orchestration QQ510, which, among others, overseeslifecycle management of applications QQ502. In some embodiments, hardware QQ504 is coupled to one or more radio units that each include one or more transmitters and one or more receivers that may be coupled to one or more antennas. Radio units may communicate directly with other hardware nodes via one or more appropriate network interfaces and may be used in combination with the virtual components to provide a virtual node with radio capabilities, such as a radio access node or a base station. In some embodiments, some signalling can be provided with the use of a control system QQ512 which may alternatively be used for communication between hardware nodes and radio units. Fig. 18 shows a communication diagram of a host QQ602 communicating via anetwork node QQ604 with a UE QQ606 over a partially wireless connection in accordance with some embodiments. Example implementations, in accordance with variousembodiments, of the UE (such as a UE QQ112a of Fig.13 and / or UE QQ200 of Fig.14),network node (such as network node QQ110a of Fig. 13 and / or network node QQ300 ofFig. 15), and host (such as host QQ116 of Fig. 13 and / or host QQ400 of Fig.16)discussed in the preceding paragraphs will now be described with reference to Fig.18.Like host QQ400, embodiments of host QQ602 include hardware, such as a communication interface, processing circuitry, and memory. The host QQ602 also includes software, which is stored in or accessible by the host QQ602 and executable by the processing circuitry. The software includes a host application that may be operable to provide a service to a remote user, such as the UE QQ606 connecting via an over-the-top (OTT) connection QQ650 extending between the UE QQ606 and host QQ602. In providing the service to the remote user, a host application may provide user data which is transmitted using the OTT connection QQ650. The network node QQ604 includes hardware enabling it to communicate with the host QQ602 and UE QQ606. The connection QQ660 may be direct or pass through a core network (like core network QQ106 of Figure 12) and / or one or more other intermediate networks, such as one or more public, private, or hosted networks. For example, an intermediate network may be a backbone network or the Internet. The UE QQ606 includes hardware and software, which is stored in or accessible by UE QQ606 and executable by the UE’s processing circuitry. The software includes a client application, such as a web browser or operator-specific “app” that may be operable to provide a service to a human or non-human user via UE QQ606 with the support of the host QQ602. In the host QQ602, an executing host application may communicate with the executing client application via the OTT connection QQ650 terminating at the UE QQ606 and host QQ602. In providing the service to the user, the UE's client application may receive request data from the host's host application and provide user data in response to the request data. The OTT connection QQ650 may transfer both the request data and the user data. The UE's client application may interact with the user to generate the user data that it provides to the host application through the OTT connection QQ650. The OTT connection QQ650 may extend via a connection QQ660 between the host QQ602 and the network node QQ604 and via a wireless connection QQ670 between the network node QQ604 and the UE QQ606 to provide the connection between the host QQ602 and the UE QQ606. The connection QQ660 and wireless connection QQ670, over which the OTT connection QQ650 may be provided, have been drawn abstractly to illustrate the communication between the host QQ602 and the UE QQ606 via the network node QQ604, without explicit reference to any intermediary devices and the precise routing of messages via these devices. As an example of transmitting data via the OTT connection QQ650, in step QQ608, the host QQ602 provides user data, which may be performed by executing a host application. In some embodiments, the user data is associated with a particular human user interacting with the UE QQ606. In other embodiments, the user data is associated with a UE QQ606 that shares data with the host QQ602 without explicit human interaction. In step QQ610, the host QQ602 initiates a transmission carrying the user data towards the UE QQ606. The host QQ602 may initiate the transmission responsive to a request transmitted by the UE QQ606. The request may be caused by human interaction with the UE QQ606 or by operation of the client application executing on the UE QQ606. The transmission may pass via the network node QQ604, in accordance with the teachings of the embodiments described throughout this disclosure. Accordingly, in step QQ612, the network node QQ604 transmits to the UE QQ606 the user data that was carried in the transmission that the host QQ602 initiated, in accordance with the teachings of the embodiments described throughout this disclosure. In step QQ614, the UE QQ606receives the user data carried in the transmission, which may be performed by a clientapplication executed on the UE QQ606 associated with the host application executed by the host QQ602. In some examples, the UE QQ606 executes a client application which provides user data to the host QQ602. The user data may be provided in reaction or response to the data received from the host QQ602. Accordingly, in step QQ616, the UE QQ606 may provide user data, which may be performed by executing the client application. In providing the user data, the client application may further consider user input received from the user via an input / output interface of the UE QQ606. Regardless of the specific manner in which the user data was provided, the UE QQ606 initiates, in step QQ618, transmission of the user data towards the host QQ602 via the network node QQ604. In step QQ620, in accordance with the teachings of the embodiments described throughout this disclosure, the network node QQ604 receives user data from the UE QQ606 and initiates transmission of the received user data towards the host QQ602. In step QQ622, the host QQ602 receives the user data carried in the transmission initiated by the UE QQ606. One or more of the various embodiments improve the performance of OTT services provided to the UE QQ606 using the OTT connection QQ650, in which the wireless connection QQ670 forms the last segment. More precisely, the teachings of these embodiments may improve transfer of provision of network services and thereby provide benefits such as better communication, better responsiveness, and / or better battery life. In an example scenario, factory status information may be collected and analyzed by the host QQ602. As another example, the host QQ602 may process audio and video data which may have been retrieved from a UE for use in creating maps. As another example, the host QQ602 may collect and analyze real-time data to assist in controlling vehicle congestion (e.g., controlling traffic lights). As another example, the host QQ602 may store surveillance video uploaded by a UE. As another example, the host QQ602 may store or control access to media content such as video, audio, VR or AR which it can broadcast, multicast or unicast to UEs. As other examples, the host QQ602 may be used for energy pricing, remote control of non-time critical electrical load to balance power generation needs, location services, presentation services (such as compiling diagrams etc. from data collected from remote devices), or any other function of collecting, retrieving, storing, analyzing and / or transmitting data. In some examples, a measurement procedure may be provided for the purpose of monitoring data rate, latency and other factors on which the one or more embodiments improve. There may further be an optional network functionality for reconfiguring the OTT connection QQ650 between the host QQ602 and UE QQ606, in response to variations in the measurement results. The measurement procedure and / or the network functionality for reconfiguring the OTT connection may be implemented in software and hardware of the host QQ602 and / or UE QQ606. In some embodiments, sensors (not shown) may be deployed in or in association with other devices through which the OTT connection QQ650 passes; the sensors may participate in the measurement procedure by supplying values of the monitored quantities exemplified above, or supplying values of other physical quantities from which software may compute or estimate the monitored quantities. The reconfiguring of the OTT connection QQ650 may include message format, retransmission settings, preferred routing etc.; the reconfiguring need not directly alter the operation of the network node QQ604. Such procedures and functionalities may be known and practiced in the art. In certain embodiments, measurements may involve proprietary UE signalling that facilitates measurements of throughput, propagation times, latency and the like, by the host QQ602. The measurements may be implemented in that software causes messages to be transmitted, in particular empty or ‘dummy’ messages, using the OTT connection QQ650 while monitoring propagation times, errors, etc. Although the computing devices described herein (e.g., UEs, network nodes, hosts) may include the illustrated combination of hardware components, other embodiments may comprise computing devices with different combinations of components. It is to be understood that these computing devices may comprise any suitable combination of hardware and / or software needed to perform the tasks, features, functions and methods disclosed herein. Determining, calculating, obtaining or similar operations described herein may be performed by processing circuitry, which may process information by, for example, converting the obtained information into other information, comparing the obtained information or converted information to information stored in the network node, and / or performing one or more operations based on the obtained information or converted information, and as a result of said processing making a determination. Moreover, while components are depicted as single boxes located within a larger box, or nested within multiple boxes, in practice, computing devices may comprise multiple different physical components that make up a single illustrated component, and functionality may be partitioned between separate components. For example, a communication interface may be configured to include any of the components described herein, and / or the functionality of the components may be partitioned between the processing circuitry and the communication interface. In another example, non-computationally intensive functions of any of such components may be implemented in software or firmware and computationally intensive functions may be implemented in hardware. In certain embodiments, some or all of the functionality described herein may be provided by processing circuitry executing instructions stored on in memory, which in certain embodiments may be a computer program product in the form of a non-transitory computer-readable storage medium. In alternative embodiments, some or all of the functionality may be provided by the processing circuitry without executing instructions stored on a separate or discrete device-readable storage medium, such as in a hard-wired manner. In any of those particular embodiments, whether executing instructions stored on a non-transitory computer-readable storage medium or not, the processing circuitry can be configured to perform the described functionality. The benefits provided by such functionality are not limited to the processing circuitry alone or to other components of the computing device, but are enjoyed by the computing device as a whole, and / or by end users and a wireless network generally. It will be appreciated that the foregoing description and the accompanying drawings represent non-limiting examples of the methods and apparatus taught herein. As such, the apparatus and techniques taught herein are not limited by the foregoing description and accompanying drawings. Instead, the embodiments herein are limited only by the following claims and their legal equivalents.

Claims

CLAIMS 1. A method performed by a network node (12) for handling communication in acommunication network (1), wherein the network node (12) comprises aplurality of transmit / receive points, TRPs, the method comprising: -determining (505) an uplink channel at each of the plurality of TRPs,based on a received uplink reference signal at the respective TRP;- determining (506) an uplink frequency difference, at each of the pluralityof TRPs, between the respective TRP and a reference TRP; and- compensating (507) the determined uplink channel at each of the pluralityof TRPs based on the respective determined uplink frequency difference.

2. The method according to claim 1, wherein the method further comprises:- transmitting (501) a downlink reference signal from each of the plurality ofTRPs to the UE (10) for frequency information reporting.

3. The method according to claim 1 or 2, wherein the method further comprises:- receiving (504) the uplink reference signal from the UE (10).

4. The method according to any of claims 1-3, wherein the method furthercomprises: -receiving (502) a determined downlink frequency difference for each ofthe plurality of TRPs from the UE (10), wherein the determined downlink frequency difference is between a respective TRP and a determinedreference TRP, and wherein the determined reference TRP is one of the plurality of TRPs; and / or -receiving (503) an identifier of the determined reference TRP, from theUE (10).

5. The method according to any of claims 1-4, wherein the method furthercomprises: -calculating (508) a precoder for each of the plurality of TRPs, based onthe compensated uplink channel associated to the respective TRP.

6. The method according to any of claims 1-5, wherein the method furthercomprises:- compensating (509) a downlink channel at each of the plurality of TRPs,based on the received downlink frequency difference associated to therespective TRP.

7. The method according to any of claims 5-6, wherein the compensateddownlink channel at each of the plurality of TRPs is precoded with thecalculated precoder for the respective TRP.

8. The method according to any of claims 6-7, wherein the downlink channel is aphysical downlink shared channel, PDSCH.

9. The method according to any of claims 2-8, wherein the downlink referencesignal is a tracking reference signal, TRS.

10. The method according to any of claims 1-9, wherein the uplink reference signalis a sounding reference signal, SRS.

11. The method according to any of claims 2-10, wherein the downlink referencesignal is transmitted periodically.

12. The method according to any of claims 2-11, wherein different downlinkreference signals are transmitted from different TRPs.

13. The method according to any one of claims 1-12, wherein the reference TRP isone of the plurality of TRPs.

14. A method performed by a user equipment, UE, (10) for handlingcommunication in a communication network (1), the method comprising:- determining (1003) a downlink frequency difference for each of a pluralityof transmit / receive points, TRPs, and a determined reference TRP; and- transmitting (1006) an uplink reference signal to the plurality of TRPs of anetwork node (12).

15. The method according to claim 14, wherein the determined downlink frequencydifference is between a respective TRP and a determined reference TRP, and wherein the determined reference TRP is one of the plurality of TRPs.

16. The method according to claim 14 or 15, wherein the method furthercomprises: -receiving (1001) a downlink reference signal from each of the plurality ofTRPs of the network node (12).

17. The method according to any one of claims 14-16, wherein the method furthercomprises: -determining (1002) a reference TRP based on a predetermined condition.

18. The method according to any one of claims 14-17, wherein the method furthercomprises: -transmitting (1004) the determined downlink frequency difference to thenetwork node (12); and / or -transmitting (1005) the determined reference TRP to the network node(12).

19. The method according to any of claims 17-18, wherein the predeterminedcondition is one or more of: a strongest received reference signal power and / ora highest Signal-to-Noise Ratio, SNR, determined from the received downlinkreference signal.

20. The method according to any of claims 14-19, wherein the uplink referencesignal is a sounding reference signal, SRS.

21. The method according to any of claims 16-20, wherein the downlink referencesignal is a tracking reference signal, TRS.

22. A network node (12) adapted to handle communication in a communicationnetwork (1), wherein the network node (12) comprises a plurality oftransmit / receive points, TRPs, and wherein the network node (12) is configured to: determine an uplink channel at each of the plurality of TRPs, based on areceived uplink reference signal at the respective TRP;determining an uplink frequency difference, at each of the plurality of TRPs, between the respective TRP and a reference TRP; andcompensate the determined uplink channel at each of the plurality of TRPsbased on the respective determined uplink frequency difference.

23. The network node (12) according to claim 22, wherein the network node (12) isconfigured to perform the method according to any of the claims 2-13.

24. A user equipment, UE, (10) adapted to handle communication in acommunication network (1), wherein the UE is configured to:determine a downlink frequency difference for each of a plurality of transmit / receive points, TRPs, and a determined reference TRP; and transmit an uplink reference signal to the plurality of TRPs of a networknode (12).

25. The UE (10) according to claim 21, wherein the UE (10) is configured toperform the method according to any of the claims 15-21.

26. A computer program product comprising instructions, which, when executed onat least one processor, cause the at least one processor to carry out the method according to any of the claims 1-21, as performed by the network node (12) or the UE (10), respectively.

27. A computer-readable storage medium, having stored thereon a computerprogram product comprising instructions which, when executed on at least one processor, cause the at least one processor to carry out the method according to any of the claims 1-21, as performed by the network node (12) or the UE (10), respectively.

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