Patent Description:
In a typical wireless 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 (CN). 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 an access node e.g. a Wi-Fi access point or a radio base station (RBS), which in some radio access technologies (RAT) may also be called, for example, a NodeB, an evolved NodeB (eNodeB) and a gNodeB (gNB). The service area or cell area is a geographical area where radio coverage is provided by the radio network node. The radio network node operates on radio frequencies to communicate over an air interface with the UEs within range of the access 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. The radio network node may be a distributed node comprising a remote radio unit and a separated baseband unit.

A Universal Mobile Telecommunications System (UMTS) is a third generation telecommunication network, which evolved from the second generation (<NUM>) 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 communication with UEs. In a forum known as the Third Generation Partnership Project (3GPP), telecommunications suppliers propose and agree upon standards for present and future generation networks and UTRAN specifically, and investigate enhanced data rate and 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. The RNCs are typically connected to one or more core networks.

Specifications for the Evolved Packet System (EPS) have been completed within the <NUM>rd Generation Partnership Project (3GPP) and this work continues in the coming 3GPP releases, such as releases of <NUM> networks. The EPS comprises the Evolved Universal Terrestrial Radio Access Network (E-UTRAN), also known as the Long-Term Evolution (LTE) radio access network, and the Evolved Packet Core (EPC), also known as System Architecture Evolution (SAE) core network. E-UTRAN/LTE is a 3GPP radio access technology wherein the radio network nodes are directly connected to the EPC core network. As such, the Radio Access Network (RAN) of an EPS has an essentially "flat" architecture comprising radio network nodes connected directly to one or more core networks.

With the emerging <NUM> technologies also known as new radio (NR), the use of very many transmit- and receive-antenna elements makes it e.g. possible 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 signals from a selected direction or directions, while suppressing unwanted signals from other directions.

<NUM> is the fifth generation of cellular technology and was introduced in Release <NUM> of the 3GPP standard. It is designed to increase speed, reduce latency, and improve flexibility of wireless services. The <NUM> system (5GS) includes both a new radio access network (NG-RAN) and a new core network (5GC).

C-band (<NUM>-<NUM>) is the main mid band spectrum for <NUM> in the U. and it is currently used by satellite broadcasting. As shown in <FIG>, part of the C-band will be re-farmed for <NUM> usage and it will be done in <NUM> phases. In the first phase (H1 <NUM>) <NUM> will be cleared for <NUM>, with an additional <NUM> for guard-band. The rest remains for satellite use. In the second phase (<NUM> years later), additional <NUM> (total <NUM>) will be re-farmed for <NUM>.

In order to protect incumbent satellite operators, the FCC requires a power flux density (PFD) limit of -<NUM> dBW/m2/MHz as measured at the earth station (ES) antenna in its authorized band of operation (<NUM>-<NUM> in Phase <NUM> and <NUM>-<NUM> in Phase <NUM>). Additionally, a PFD limit of -<NUM> dBW/m2/MHz applied across the <NUM>-<NUM> band at the earth station antenna to prevent receiver blocking. Since a PFD limit is used rather than power spectral density (PSD) limit in the FCC requirement, the receiver antenna gain is not considered (i.e. a <NUM> dBi reference antenna shall be assumed). Due to this requirement, extraordinary measures may be needed at the infrastructure/network level to limit the out of band emission (OOBE) in both DL and UL in C-band deployments in the vicinities of satellite ESs.

Additionally, it is expected that UEs will be using the regular n77 band for the US C-band. As shown in <FIG>, these UEs have their passband between <NUM>-<NUM> and so the satellite spectrum would be in-band and thus governed by the RAN4 Adjacent Channel Leakage Ratio (ACLR) requirement of <NUM> dB, which may provide sufficient suppression towards the ESs. Thus, it is expected that in some cells in vicinity of satellite ESs, the maximum UE power may need to be limited.

The RAT next generation mobile wireless communication system (<NUM>) or NR, supports a diverse set of use cases and a diverse set of deployment scenarios. The later includes deployment at both low frequencies (<NUM> of MHz), similar to the RAT LTE today, and very high frequencies (mm waves in the tens of GHz).

Similar to LTE, NR uses Orthogonal Frequency Division Multiplexing (OFDM) in the DL (i.e. from a network node (NN), gNB, eNB, or base station, to a UE). The basic NR physical resource over an antenna port can thus be a time-frequency grid as illustrated in <FIG>, where a resource block (RB) in a <NUM>-symbol slot is shown. An RB corresponds to <NUM> contiguous subcarriers in the frequency domain. RBs are numbered in the frequency domain, starting with <NUM> from one end of the system bandwidth. Each resource element (RE) corresponds to one OFDM subcarrier during one OFDM symbol interval.

Different subcarrier spacing values are supported in NR. The supported subcarrier spacing values (also referred to as different numerologies) are given by Δf = (<NUM> × <NUM>α) kHz where α ∈ (<NUM>,<NUM>,<NUM>,<NUM>,<NUM>). Δf = <NUM>kHz is the basic (or reference) subcarrier spacing that is also used in LTE.

In the time domain, DL and UL transmissions in NR will be organized into equally sized subframes (SF) of <NUM> each, similar to LTE. An SF is further divided into multiple slots of equal duration. The slot length for subcarrier spacing Δf = (<NUM> × <NUM>α) kHz is <NUM>/<NUM>α ms. There is only one slot per SF at Δf = <NUM>kHz and a slot consists of <NUM> OFDM symbols.

DL transmissions are dynamically scheduled, i.e., in each slot the gNB transmits DL control information (DCI) about which UE data is to be transmitted to and which RBs in
the current DL slot the data is transmitted on. This control information is typically transmitted in the first one or two OFDM symbols in each slot in NR. The control information is carried on the Physical Downlink Control Channel (PDCCH) and data is carried on the Physical Downlink Shared Channel (PDSCH). A UE first detects and decodes PDCCH and if a PDCCH is decoded successfully, it then decodes the corresponding PDSCH based on the decoded control information in the PDCCH.

In addition to PDCCH and PDSCH, there are also other channels and reference signals (RS) transmitted in the DL.

UL data transmissions, carried on Physical Uplink Shared Channel (PUSCH), are also dynamically scheduled by the gNB by transmitting a DCI. In case of time division duplex (TDD) operation, the DCI (which is transmitted in the DL region) always indicates a scheduling offset so that the PUSCH is transmitted in a slot in the UL region.

Existing infrastructure/network level strategies for uplink out-of-band (OOB) interference mitigation limits the UE maximum power level in cells in vicinities of an ES. Such UE power reduction will negatively impact the UL coverage and throughput in the cell.

<CIT> patent application (UE power control for multiple uplink carriers; MOLAVIANJAZI EBRAHIM [US] ET AL) discloses UE power control for multiple uplink carriers.

<CIT> patent application (Method and apparatus for determining transmission resource and transmission power in wireless communication system; LEE NAM JEONG [KR] ET AL) discloses a communication technique for combining a <NUM> communication system that supports higher data transmission rates after <NUM> systems with loT technology.

<CIT> patent application (Base station device and communication control method; NTT DOCOMO INC [JP]) discloses a base station apparatus capable of communicating with user equipment terminals using an uplink shared channel.

An object of embodiments herein is to provide a mechanism that enables communication in a reliable and improved manner.

According to an aspect the object is achieved by providing a method performed by a radio network node for handling communication in a wireless communication network. The radio network node schedules a UE served by the radio network node in a first cell of a first RAT, to a resource part of a total bandwidth for the first RAT for communicating, wherein resource parts of the total bandwidth have different maximum power limits, and the resource part is selected based on a pathloss of the UE and wherein scheduling of the UE comprise scheduling UEs according to a UE list comprising UEs arranged in an order defined by maximum transmission power of the UEs, matched with a frequency list defining resource parts ordered in a maximum power limit order.

It is furthermore provided herein a computer program product comprising instructions, which, when executed on at least one processor, cause the at least one processor to carry out any of the methods herein, as performed by the radio network node. It is additionally provided herein a computer-readable storage medium, having stored thereon a computer program 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 methods herein, as performed by the radio network node.

According to yet another aspect the object is achieved by providing a radio network node for handling communication in a wireless communication network. The radio network node is configured to schedule a UE served by the radio network node in a first cell of a first RAT, to a resource part of a total bandwidth for the first RAT for communicating, wherein resource parts of the total bandwidth have different maximum power limits, and the resource part is selected based on a pathloss of the UE, wherein the radio network node is configured to schedule UEs according to a UE list comprising UEs arranged in an order defined by maximum transmission power of the UEs, matched with a frequency list defining resource parts ordered in a maximum power limit order.

Embodiments herein relate to methods that reduce the out-of-band interference generated towards a second network node such as an ES without sacrificing UL coverage or performance. It is herein suggested a new approach to reduce the uplink OOB interference from UEs towards ESs. More precisely, the channel bandwidth is split into resource parts such as scheduling blocks (SB), where a SB is the smallest resource unit (e.g. it usually consists of two resource blocks) a scheduler can assign to a UE. In principal, different SBs can have different maximum power limits also referred to as maximum uplink power limits or maximum transmission power limits, where the closer a SB is to the satellite's spectrum the lower its maximum uplink power limit. The motivation behind this distributed maximum allowed uplink power is that UEs that are scheduled onto the higher part of the spectrum (i.e. closer to the ES's spectrum) have a higher level of OOBE than UEs that are scheduled to the lower part and thus the latter ones could operate with higher maximum uplink power limits.

The maximum uplink power limits of the SBs may be determined by a desired level of OOB emissions and it depends on how many UEs can simultaneously interfere with the ESs and the desired minimum distance between UEs and ESs. Embodiments herein allow an operator to schedule resources to the UE in order for UEs to transmit with higher uplink power at resources not causing OOB interference leading to a minimal impact on a cell and UE throughput. Thus, embodiments herein reduce OOB interference and hence, provides a more reliable and improved communication in the wireless communication network.

Embodiments herein are described in the context of <NUM>/NR but the same concept can also be applied to other wireless communication system such as <NUM>/LTE. Embodiments herein may be described within the context of 3GPP NR radio technology (<NPL>)), e.g. using gNB as the radio network node. It is understood, that the problems and solutions described herein are equally applicable to wireless access networks and user-equipments (UEs) implementing other access technologies and standards. NR is used as an example technology where embodiments are suitable, and using NR in the description therefore is particularly useful for understanding the problem and solutions solving the problem. In particular, embodiments are applicable also to 3GPP LTE, or 3GPP LTE and NR integration, also denoted as nonstandalone NR.

Embodiments herein relate to wireless communication networks in general. <FIG> is a schematic overview depicting a wireless communication network <NUM>. The wireless communication network <NUM> comprises e.g. one or more RANs and one or more CNs. The wireless communication network <NUM> may use one or a number of different technologies, such as Wi-Fi, Long Term Evolution (LTE), LTE-Advanced, NR, 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 <NUM> systems, however, embodiments are also applicable in further development of the existing communication systems such as e.g. a WCDMA or a LTE system.

In the wireless communication network <NUM>, wireless devices e.g. a UE <NUM> 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 core networks (CN). 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 <NUM> comprises a first radio network node <NUM> providing e.g. radio coverage over a geographical area, a first service area <NUM> i.e. a first cell, of a radio access technology (RAT), such as NR, LTE, Wi-Fi, WiMAX or similar. The first radio network node <NUM> 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 first radio network node <NUM> may alternatively or additionally be a controller node or a packet processing node or similar. The first radio network node <NUM> may be referred to as source node, source access node or a serving network node wherein the first service area <NUM> may be referred to as a serving cell, source cell or primary cell, and the first radio network node communicates with the UE <NUM> in form of DL transmissions to the UE <NUM> and UL transmissions from the UE <NUM>. The first radio network node <NUM> 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.

Further is a second network node <NUM> providing e.g. radio coverage over a geographical area of a radio access technology (RAT), such as a non-terrestrial communication network. The second network node <NUM> may be a satellite dish, a satellite receiver and transmitter, a computational server, a stand-alone access point or any other network unit or node depending e.g. on the radio access technology and terminology used. The second network node <NUM> may be referred to as a non-terrestrial node, or a satellite node.

According to embodiments herein the first radio network node <NUM>, also referred herein as just the radio network node, schedules communication of the UE <NUM> served in the first cell <NUM>, to a resource part, such as a scheduling block (SB), of a total bandwidth for the first RAT, wherein resource parts of the total bandwidth have different maximum power limits, and the resource part is selected based on a pathloss of the UE <NUM>. Pathloss herein indicated by maximum transmission power of the UE <NUM>.

Embodiments herein give an operator the opportunity to schedule UEs with higher pathloss to the lower part of the spectrum and allow them to transmit with higher uplink power. This feature can reduce the OOB emissions to the desired level with the minimal impact on cell and user throughput. An additional advantage of distributing the maximum uplink power over the channel is that it can be static. That is, it does not depend on the position of UEs and thus positioning, or UE-specific power control is not needed which can increase the complexity of the system considerably.

<FIG> is a combined flowchart and signalling scheme according to embodiments herein.

Action <NUM>. The radio network node <NUM> may determine a maximum power limit for one or more resource parts, i.e. SBs, of the total bandwidth. The resource parts may be listed in a list e.g. the resource parts are listed in a frequency list in an order of frequencies and thus lower frequencies indicate higher maximum power limits.

The radio network node <NUM> may measure OOBE for each SB as a function of UE's transmission power in order to define a function of power fn(p). The radio network node <NUM> may further determine a maximum total allowed level of OOBE L transmitted from UEs towards the second network node <NUM>. The radio network node <NUM> may then determine number of UEs K that can interfere simultaneously with the second network node <NUM>, and then define the maximum uplink power <MAT> for the n-th SB according to the equation <MAT>.

Action <NUM>. The radio network node <NUM> may further obtain or determine a maximum transmission power of one or more UEs such as the UE <NUM>. The radio network node <NUM> may determine pathloss for the UE and thus determine maximum transmission based on the pathloss. For example, the radio network node <NUM> may determine the transmission power of the UEs to be scheduled, and may sort the UEs in an order of transmission power in a UE list.

Action <NUM>. The radio network node <NUM> may further determine a number of resource parts each UE needs to have schedule.

Action <NUM>. The radio network node <NUM> schedules communication of the UE <NUM> to a resource part of the total bandwidth, wherein resource parts of the total bandwidth have different maximum power limits, and the resource part is selected based on a pathloss of the UE <NUM>. For example, the radio network node <NUM> may schedule the UE <NUM> to the resource part taking into account the determined maximum transmission power for one or more resource parts, the obtained maximum transmission power of the UE <NUM> and/or number of resource parts needed by the UE <NUM>. The radio network node <NUM> may e.g. allocate resource part/s of lowest frequency (frequencies below a threshold) to UE or UEs with highest transmission power in the buffer (maximum transmission above a threshold). The radio network node <NUM> may for example, list the resource parts in a frequency list in an order of frequencies and allocate the UEs in the UE list (decreasing maximum transmission power) to the resource parts in the frequency list (increasing frequencies).

Action <NUM>. The radio network node <NUM> may then transmit information relating to the scheduling so called scheduling information or control information. The radio network node <NUM> may for example transmit control information or a grant indicating the resource part to use for the UE <NUM>. The radio network node <NUM> may in some embodiments transmits a TPC indicating the maximum transmission power to the UE <NUM>, wherein the TPC is based on the determined maximum transmission of the resource part and/or the obtained maximum transmission power of the UE <NUM>. For example, the TPC indicates an +Δ or -Δ offset in transmission power, where Δ takes specific values (e.g. Δ=<NUM>,<NUM>). This means that if the initial maximum transmission power of a UE is <NUM> dBm but the maximum power limit is <NUM> dBm, then, the radio network node <NUM> may transmit two TPC commands (or two TTIs) to reach this level. The first will indicate Δ=-<NUM> and the second Δ=-<NUM>.

Action <NUM>. The UE <NUM> may then perform communication based on the received information relating to the scheduling.

Nonlinear hardware constraint causes a radio system to emit spurious power outside its allocated bandwidth. This OOB radiation or emission could harm the operation of a victim wireless system by interfering with its signal. Therefore, the amount of OOB radiation a transmitter can emit is regulated. Nevertheless, when the victim is a ground station, FCC has set additional requirements at the receiver of the ground station due to its higher than other systems sensitivity to interference.

It is herein disclosed a new scheduling scheme, namely based on distributed maximum uplink power, in order to meet the uplink OOB emissions requirements stemming from UEs towards the nearby ground stations with the minimal impact on cell and user throughput.

The principal idea of distributing the power over the channel is that first the OOB emissions are not symmetric with respect to the carrier frequency. For instance, simulations of power spectrum density of a UE show that when one RB is scheduled to the upper right of the <NUM> channel, intermodulation products (i.e. peaks) within the OOBE (which lie in the satellite's spectrum) appear only on the higher adjacent band while the lower adjacent band is clean from intermodulation products. Thus, UEs scheduled in the higher part of the channel need more power backoff than UEs scheduled in the lower part. Secondly, UEs that experience higher pathloss should suffer less from the OOBE mitigation in order to have the minimal impact on the cell throughput. Thus, these UEs may be scheduled to the lower part of the channel where higher transmit power will be allowed.

There are mainly two different ways of power control mechanism. One is called Open Loop Power control and the other one is called Closed Loop Power Control. In Open Loop Control, UEs determine their transmission power by their own power setting algorithm. This power setting algorithm is based on internal setting or measurement data by the UE. There is no feedback input from the radio network node <NUM> except the configuration of the Open Loop Power Control parameters which define the Signal to Noise Ratio (SNR) target P0, fractional path loss compensation factor α, maximum power Pc,max as well as which reference signal to measure path loss on.

In the Closed Loop Power Control, the UE's transmission power is controlled by some feedback input from the radio network node <NUM>. Once initial physical random access channel (PRACH) is detected, the UE power is controlled dynamically by Transmission Power Control (TPC) command, in e.g. medium access control (MAC) control element (CE) or TPC field in downlink control indicator (DCI).

Next, the distributed power restriction according to embodiments herein is presented based on both Open and Closed Loop Power Control. As shown in <FIG>, the channel bandwidth is split into scheduling blocks (SB). A SB is the smallest resource unit a scheduler of the radio network node <NUM> can assign to the UE <NUM>. Furthermore, each SB has a dedicated maximum uplink power <MAT>, <NUM> ≤ k ≤ N, where k denotes the k-th SB and N denotes the total SBs in the channel. In general, the closer, in frequency, a SB is to the second RAT's frequency spectrum the lower its maximum uplink transmission power is. That is, <MAT>.

This condition will limit the out-of-band interference towards the second network node <NUM> while the maximum uplink transmission power depends on the desired level of OOB interference. Furthermore, in order to limit the performance degradation, UEs with higher pathloss are scheduled to the lower SBs, i.e. SBs with higher maximum power limit. The procedure of scheduling UEs in each transmission time interval (TTI) is the following:.

It is herein disclosed a methodology for obtaining the maximum allowed transmission power, i.e. the maximum power limit, for each scheduling block. The first step is to define the function fn(p) which yields the maximum level of OOBE for the n-th scheduling block (e.g. by conducting measurements) as a function of UE's transmission power p.

<FIG> shows a Maximum OOBE per scheduling block as a function of the power backoff. It is shown that the resource parts or SBs of higher frequencies SB53-SB45 have higher OBBE and should have a lower maximum power limit.

Depending on the level of out-of-band interference, the maximum power limit per scheduling block is chosen such that all scheduling block meet the desired level of out-of-band emissions. The procedure of defining the maximum power limit per SB is the following:.

As an example, consider a simulated OOBE (dBm/<NUM>). In this example, an uplink channel of <NUM> with subcarrier spacing <NUM> and <NUM> subcarriers per physical resource block (PRB) are assumed. Additionally, one SB consists of <NUM> PRBs and the total number of PRBs in the channel is <NUM>.

If the level of maximum OOBE from a UE (or SB) towards a satellite is Ln = - <NUM> dBm/MHz (or - 60dBm/<NUM>), (n = <NUM>,. N), then the maximum uplink power for each SB is given by Table <NUM>. The OOBE may be defined as a function of the power backoff and thus the maximum UL power, i.e. maximum power limit, is calculated as the difference between the total maximum power (i.e. <NUM> dBm) and power backoff.

Furthermore, the interpretation of the level of OOBE in terms of minimum distance between the UEs and ES (assuming free space pathloss) and the number of simultaneously interfering UEs in order to meet the FCC requirements is shown in Table <NUM>. For example, if the maximum allowed level of OOBE per SB is Ln = -40dBm/MHz (or - <NUM> dBm/<NUM>) then the total maximum power limit towards the satellite depends on the maximum number of UEs that can interfere with the satellite, i.e. L(dBm) = Ln(dBm)+<NUM>log<NUM>(K). Notice that the lower the level of OOBE is achieved per SB the more UEs can interfere with the satellite or the less the distance a UE can approach the satellite.

Finally, it is worth mentioning that according to a UE's measurements the unwanted emissions cannot be less than -53dBm/MHz (or -73dBm/<NUM>) and thus it cannot be achieved better emissions than this level neither by power backoff nor restricting PRBs to the lower part of the UL channel. This is due to the spurious emissions which are not included in the OOBE and are generally caused by unwanted transmitter effects such as harmonics emission, parasitic emissions, intermodulation products, and frequency conversion products.

The method actions performed by the radio network node <NUM> for handling communication in the wireless communication network <NUM> according to embodiments herein will now be described with reference to a flowchart depicted in <FIG>. The actions do not 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 <NUM>. The radio network node <NUM> may determine the different maximum power limits of one or more of the resource parts of the total bandwidth. The different maximum power limits may be related to the bandwidth distance to the second bandwidth allocated to the second RAT. For example, a first resource part of the total bandwidth that is closer to the second bandwidth than a second resource part of the total bandwidth, has a lower maximum power limit than the second resource part. The radio network node <NUM> may determine the different maximum power limits by: measuring out of band emission of each resource part as a function of UE's transmission power; determining a total level of out of band emissions L transmitted from UEs towards a second network node of the second RAT; determining number of UEs K that are able to simultaneously interfere with the second network node; and defining the maximum power limit for the nth resource part <MAT> according to the equation <MAT>.

Action <NUM>. The radio network node <NUM> may obtain a maximum transmission power of the UE <NUM>. The radio network node <NUM> may determine pathloss of one or more UEs.

Action <NUM>. The radio network node <NUM> may determine number of resource parts needed for the UE <NUM>, e.g. number so SBs.

Action <NUM>. The radio network node <NUM> schedules the UE <NUM> served by the radio network node <NUM> in the first cell of the first RAT, to a resource part of the total bandwidth for the first RAT for communicating, wherein resource parts of the total bandwidth have different maximum power limits, and the resource part is selected based on the pathloss of the UE. The first RAT may be a terrestrial RAT e.g. LTE or NR and the second RAT may be a non-terrestrial RAT such as a satellite network. The radio network node <NUM> may schedule the UE <NUM> based on one or more of the following: determined maximum power limit of radio resources; obtained maximum transmission power of the UE; and determined number of resource parts needed. The radio network node <NUM> may schedule UEs according to a UE list comprising UEs arranged in an order defined by maximum transmission power of the UEs, matched with frequency list defining resource parts ordered in a maximum power limit order.

Action <NUM>. The radio network node <NUM> may then transmit scheduling information such as a grant indicating the scheduling and/or a TPC indicating the adjusted maximum transmission power. For example, the radio network node <NUM> may schedule the UE <NUM> by adjusting obtained maximum transmission power of the UE <NUM> to a maximum transmission power limit of the selected resource part, and may then transmit a transmit power command comprising an indication of the adjusted maximum transmission power.

<FIG> is a block diagram depicting the radio network node <NUM>, in two embodiments, for handling communication, e.g. handling, enabling or performing communication, in the wireless communication network <NUM> according to embodiments herein.

The radio network node <NUM> may comprise processing circuitry <NUM>, e.g. one or more processors, configured to perform the methods herein.

The radio network node <NUM> may comprise a scheduling unit <NUM>, e.g. a scheduler. The radio network node <NUM>, the processing circuitry <NUM> and/or the scheduling unit <NUM> is configured to schedule the UE <NUM> served by the radio network node in the first cell of the first RAT, to the resource part of the total bandwidth for the first RAT for communicating, wherein resource parts of the total bandwidth have different maximum power limits. The radio network node <NUM>, the processing circuitry <NUM> and/or the scheduling unit <NUM> is configured to select the resource part based on a pathloss of the UE <NUM>. The different maximum power limits may be related to a bandwidth distance to the second bandwidth allocated to the second RAT. The first resource part of the total bandwidth that is closer to the second bandwidth than the second resource part of the total bandwidth, has a lower maximum power limit than the second resource part. The first RAT may be a terrestrial RAT and the second RAT may be a non-terrestrial RAT. The radio network node <NUM>, the processing circuitry <NUM> and/or the scheduling unit <NUM> may be configured to schedule UEs according to the UE list comprising UEs arranged in the order defined by maximum transmission power of the UEs, matched with the frequency list defining resource parts ordered in the maximum power limit order.

The radio network node <NUM> may comprise a determining unit <NUM>. The radio network node <NUM>, the processing circuitry <NUM> and/or the determining unit <NUM> may be configured to determine the different maximum power limits of the one or more of the resource parts of the total bandwidth. The radio network node <NUM>, the processing circuitry <NUM> and/or the determining unit <NUM> may be configured to determine the different maximum power limits by: measuring out of band emission of each resource part as a function of UE's transmission power; determining a total level of out of band emissions L transmitted from UEs towards a second network node of the second RAT; determining number of UEs K that are able to simultaneously interfere with the second network node; and defining the maximum power limit for the nth resource part <MAT> according to the equation <MAT>.

The radio network node <NUM>, the processing circuitry <NUM> and/or the determining unit <NUM> may be configured to determine number of resource parts needed for the UE.

The radio network node <NUM> may comprise an obtaining unit <NUM>. The radio network node <NUM>, the processing circuitry <NUM> and/or the obtaining unit <NUM> may be configured to obtain the maximum transmission power of the UE.

The radio network node <NUM>, the processing circuitry <NUM> and/or the scheduling unit <NUM> may be configured to schedule the UE <NUM> based on one or more of the following: determined maximum power limit of radio resources; obtained maximum transmission power of the UE; and determined number of resource parts needed.

The radio network node <NUM> may comprise a transmitting unit <NUM>, e.g. a transmitter or a transceiver. The radio network node <NUM>, the processing circuitry <NUM> and/or the transmitting unit <NUM> may be configured to transmit scheduling information to the UE <NUM> relating to the scheduling of the UE <NUM>. The radio network node <NUM>, the processing circuitry <NUM> and/or the scheduling unit <NUM> may be configured to schedule the UE by adjusting obtained maximum transmission power of the UE to a maximum transmission power limit of the selected resource part, and the radio network node <NUM>, the processing circuitry <NUM> and/or the transmitting unit <NUM> may be configured to transmit the transmit power command comprising the indication of the adjusted maximum transmission power.

The radio network node <NUM> further comprises a memory <NUM>. The memory comprises one or more units to be used to store data on, such as indications, scheduling information, maximum transmission powers, spectrum information, allocated resources, strengths or qualities, grants, messages, execution conditions, user data, reconfiguration, configurations, scheduling information, timers, applications to perform the methods disclosed herein when being executed, and similar. The radio network node <NUM> comprises a communication interface <NUM> comprising transmitter, receiver, transceiver and/or one or more antennas. Thus, it is herein provided the radio network node for handling communication in a wireless communications network, wherein the radio network node comprises processing circuitry and a memory, said memory comprising instructions executable by said processing circuitry whereby said radio network node <NUM> is operative to perform any of the methods herein.

The methods according to the embodiments described herein for the radio network node <NUM> are respectively implemented by means of e.g. a computer program product <NUM> or a computer program product, 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 radio network node <NUM>. The computer program product <NUM> may be stored on a computer-readable storage medium <NUM>, e.g. a universal serial bus (USB) stick, a disc or similar. The computer-readable storage medium <NUM>, 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 radio network node <NUM>. In some embodiments, the computer-readable storage medium may be a non-transitory or transitory computer-readable storage medium.

In some embodiments a more general term "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. Examples of network nodes are NodeB, Master eNB, Secondary eNB, a network node belonging to Master cell group (MCG) or Secondary Cell Group (SCG), base station (BS), multi-standard radio (MSR) radio node such as MSR BS, eNodeB, network controller, radio network controller (RNC), base station controller (BSC), relay, donor node controlling relay, base transceiver station (BTS), access point (AP), transmission points, transmission nodes, Remote Radio Unit (RRU), Remote Radio Head (RRH), nodes in distributed antenna system (DAS), core network node e.g. Mobility Switching Centre (MSC), Mobile Management Entity (MME) etc., Operation and Maintenance (O&M), Operation Support System (OSS), Self-Organizing Network (SON), positioning node e.g. Evolved Serving Mobile Location Centre (E-SMLC), Minimizing Drive Test (MDT) etc..

In some embodiments the non-limiting term wireless device or user equipment (UE) is used and it refers to any type of wireless device communicating with a network node and/or with another UE in a cellular or mobile communication system. Examples of UE are target device, device-to-device (D2D) UE, proximity capable UE (aka ProSe UE), machine type UE or UE capable of machine to machine (M2M) communication, PDA, PAD, Tablet, mobile terminals, smart phone, laptop embedded equipped (LEE), laptop mounted equipment (LME), USB dongles etc..

The embodiments are described for <NUM>. However the embodiments are applicable to any RAT or multi-RAT systems, where the UE receives and/or transmit signals (e.g. data) e.g. LTE, LTE FDD/TDD, WCDMA/HSPA, GSM/GERAN, Wi Fi, WLAN, CDMA2000 etc..

As will be readily understood by those familiar with communications design, that functions means or modules 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, read-only memory (ROM) for storing software, random-access memory for storing software and/or program or application data, and non-volatile memory. Designers of communications devices will appreciate the cost, performance, and maintenance trade-offs inherent in these design choices.

With reference to <FIG>, in accordance with an embodiment, a communication system includes a telecommunication network <NUM>, such as a 3GPP-type cellular network, which comprises an access network <NUM>, such as a radio access network, and a core network <NUM>. The access network <NUM> comprises a plurality of base stations 3212a, 3212b, 3212c, such as NBs, eNBs, gNBs or other types of wireless access points being examples of the radio network node <NUM> herein, each defining a corresponding coverage area 3213a, 3213b, 3213c. Each base station 3212a, 3212b, 3212c is connectable to the core network <NUM> over a wired or wireless connection <NUM>. A first user equipment (UE) <NUM>, being an example of the UE <NUM>, located in coverage area 3213c is configured to wirelessly connect to, or be paged by, the corresponding base station 3212c. A second UE <NUM> in coverage area 3213a is wirelessly connectable to the corresponding base station 3212a.

The host computer <NUM> and the connected UEs <NUM>, <NUM> are configured to communicate data and/or signalling via the OTT connection <NUM>, using the access network <NUM>, the core network <NUM>, any intermediate network <NUM> and possible further infrastructure (not shown) as intermediaries.

The wireless connection <NUM> between the UE <NUM> and the base station <NUM> is in accordance with the teachings of the embodiments described throughout this disclosure. One or more of the various embodiments improve the performance of OTT services provided to the UE <NUM> using the OTT connection <NUM>, in which the wireless connection <NUM> forms the last segment. More precisely, the teachings of these embodiments may achieve low data interruption (interference between the systems is minimized), and thereby provide benefits such as improved battery time of the UE, and better responsiveness.

In certain embodiments, measurements may involve proprietary UE signalling facilitating the host computer's <NUM> measurements of throughput, propagation times, latency and the like.

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.

Claim 1:
A method performed by a radio network node (<NUM>) for handling communication in a wireless communication network, the method comprising:
- scheduling (<NUM>) a user equipment, UE, served by the radio network node in a first cell of a first radio access technology, RAT, to a resource part of a total bandwidth for the first RAT for communicating, wherein resource parts of the total bandwidth have different maximum power limits, and the resource part is selected based on a pathloss of the UE, wherein scheduling of the UE comprise scheduling UEs according to a UE list comprising UEs arranged in an order defined by maximum transmission power of the UEs, matched with a frequency list defining resource parts ordered in a maximum power limit order.