Patent Description:
A mobile device should be configured to satisfy a reference sensitivity power level (REFSENS) which is the minimum average power for each antenna port of the mobile device when receiving the downlink signal.

Documents <CIT> and <CIT> disclose methods and apparatuses for transmitting and receiving signals in dual connectivity between EUTRA and NR in specific operating bands.

The technical reports "<NPL> and "<NPL>disclose the calculations of different MSDs based on dual connectivity and/or carrier aggregation when specific band combinations are used.

When a harmonics component and/or an intermodulation distortion (IMD) component occurs, there is a possibility that the REFSENS for the downlink signal may not be satisfied due to the uplink signal transmitted by the mobile device.

In accordance with an embodiment of the present disclosure, a disclosure of this specification provides a device configured to operate in a wireless system, the device according to the independent claims <NUM> and <NUM>. A method performed by a device is also claimed in claim <NUM>, the method being equivalent to the device of claim <NUM>.

The present disclosure can have various advantageous effects.

For example, by performing disclosure of this specification, UE can transmit signal with dual uplink by applying MSD value.

Advantageous effects which can be obtained through specific embodiments of the present disclosure are not limited to the advantageous effects listed above. For example, there may be a variety of technical effects that a person having ordinary skill in the related art can understand and/or derive from the present disclosure. Accordingly, the specific effects of the present disclosure are not limited to those explicitly described herein, but may include various effects that may be understood or derived from the technical features of the present disclosure.

Evolution of 3GPP LTE includes LTE-A (advanced), LTE-A Pro, and/or <NUM> NR (new radio).

For example, "A/ B" may mean "A and/or B".

Also, parentheses used in the present disclosure may mean "for example". In detail, when it is shown as "control information (PDCCH)", "PDCCH" may be proposed as an example of "control information". In other words, "control information" in the present disclosure is not limited to "PDCCH" and "PDDCH" may be proposed as an example of "control information". In addition, even when shown as "control information (i.e., PDCCH)", "PDCCH" may be proposed as an example of "control information".

AI refers to the field of studying artificial intelligence or the methodology that can create it, and machine learning refers to the field of defining various problems addressed in the field of AI and the field of methodology to solve them. Machine learning is also defined as an algorithm that increases the performance of a task through steady experience on a task.

Robot means a machine that automatically processes or operates a given task by its own ability. In particular, robots with the ability to recognize the environment and make self-determination to perform actions can be called intelligent robots. Robots can be classified as industrial, medical, home, military, etc., depending on the purpose or area of use. The robot can perform a variety of physical operations, such as moving the robot joints with actuators or motors. The movable robot also includes wheels, brakes, propellers, etc., on the drive, allowing it to drive on the ground or fly in the air.

Autonomous driving means a technology that drives on its own, and autonomous vehicles mean vehicles that drive without user's control or with minimal user's control. For example, autonomous driving may include maintaining lanes in motion, automatically adjusting speed such as adaptive cruise control, automatic driving along a set route, and automatically setting a route when a destination is set. The vehicle covers vehicles equipped with internal combustion engines, hybrid vehicles equipped with internal combustion engines and electric motors, and electric vehicles equipped with electric motors, and may include trains, motorcycles, etc., as well as cars. Autonomous vehicles can be seen as robots with autonomous driving functions.

Extended reality is collectively referred to as VR, AR, and MR. VR technology provides objects and backgrounds of real world only through computer graphic (CG) images. AR technology provides a virtual CG image on top of a real object image. MR technology is a CG technology that combines and combines virtual objects into the real world. MR technology is similar to AR technology in that they show real and virtual objects together. However, there is a difference in that in AR technology, virtual objects are used as complementary forms to real objects, while in MR technology, virtual objects and real objects are used as equal personalities.

NR supports multiples numerologies (and/or multiple subcarrier spacings (SCS)) to support various <NUM> services. For example, if SCS is <NUM>, wide area can be supported in traditional cellular bands, and if SCS is <NUM>/<NUM>, dense-urban, lower latency, and wider carrier bandwidth can be supported. If SCS is <NUM> or higher, bandwidths greater than <NUM> can be supported to overcome phase noise.

Referring to <FIG>, a first wireless device <NUM> and a second wireless device <NUM> may transmit/receive radio signals to/from an external device through a variety of RATs (e.g., LTE and NR).

In <FIG>, {the first wireless device <NUM> and the second wireless device <NUM>} may correspond to at least one of {the wireless device 100a to 100f and the BS <NUM>}, {the wireless device 100a to 100f and the wireless device 100a to 100f} and/or {the BS <NUM> and the BS <NUM>} of <FIG>.

The first wireless device <NUM> may include at least one transceiver, such as a transceiver <NUM>, at least one processing chip, such as a processing chip <NUM>, and/or one or more antennas <NUM>.

The processing chip <NUM> may include at least one processor, such a processor <NUM>, and at least one memory, such as a memory <NUM>. It is exemplarily shown in <FIG> that the memory <NUM> is included in the processing chip <NUM>. Additional and/or alternatively, the memory <NUM> may be placed outside of the processing chip <NUM>.

The processor <NUM> may control the memory <NUM> and/or the transceiver <NUM> and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts described in the present disclosure. For example, the processor <NUM> may process information within the memory <NUM> to generate first information/signals and then transmit radio signals including the first information/signals through the transceiver <NUM>. The processor <NUM> may receive radio signals including second information/signals through the transceiver <NUM> and then store information obtained by processing the second information/signals in the memory <NUM>.

The memory <NUM> may be operably connectable to the processor <NUM>. The memory <NUM> may store various types of information and/or instructions. The memory <NUM> may store a software code <NUM> which implements instructions that, when executed by the processor <NUM>, perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure. For example, the software code <NUM> may implement instructions that, when executed by the processor <NUM>, perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure. For example, the software code <NUM> may control the processor <NUM> to perform one or more protocols. For example, the software code <NUM> may control the processor <NUM> to perform one or more layers of the radio interface protocol.

Herein, the processor <NUM> and the memory <NUM> may be a part of a communication modem/circuit/chip designed to implement RAT (e.g., LTE or NR). The transceiver <NUM> may be connected to the processor <NUM> and transmit and/or receive radio signals through one or more antennas <NUM>. Each of the transceiver <NUM> may include a transmitter and/or a receiver. The transceiver <NUM> may be interchangeably used with radio frequency (RF) unit(s). In the present disclosure, the first wireless device <NUM> may represent a communication modem/circuit/chip.

The second wireless device <NUM> may include at least one transceiver, such as a transceiver <NUM>, at least one processing chip, such as a processing chip <NUM>, and/or one or more antennas <NUM>.

The processor <NUM> may control the memory <NUM> and/or the transceiver <NUM> and may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts described in the present disclosure. For example, the processor <NUM> may process information within the memory <NUM> to generate third information/signals and then transmit radio signals including the third information/signals through the transceiver <NUM>. The processor <NUM> may receive radio signals including fourth information/signals through the transceiver <NUM> and then store information obtained by processing the fourth information/signals in the memory <NUM>.

Herein, the processor <NUM> and the memory <NUM> may be a part of a communication modem/circuit/chip designed to implement RAT (e.g., LTE or NR). The transceiver <NUM> may be connected to the processor <NUM> and transmit and/or receive radio signals through one or more antennas <NUM>. Each of the transceiver <NUM> may include a transmitter and/or a receiver. The transceiver <NUM> may be interchangeably used with RF unit. In the present disclosure, the second wireless device <NUM> may represent a communication modem/circuit/chip.

As an example, one or more application specific integrated circuits (ASICs), one or more digital signal processors (DSPs), one or more digital signal processing devices (DSPDs), one or more programmable logic devices (PLDs), or one or more field programmable gate arrays (FPGAs) may be included in the one or more processors <NUM> and <NUM>. The descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure may be implemented using firmware or software and the firmware or software may be configured to include the modules, procedures, or functions. Firmware or software configured to perform the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure may be included in the one or more processors <NUM> and <NUM> or stored in the one or more memories <NUM> and <NUM> so as to be driven by the one or more processors <NUM> and <NUM>. The descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure may be implemented using firmware or software in the form of code, commands, and/ or a set of commands.

The one or more transceivers <NUM> and <NUM> may be connected to the one or more antennas <NUM> and <NUM> and the one or more transceivers <NUM> and <NUM> may be configured to transmit and receive user data, control information, and/or radio signals/channels, mentioned in the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure, through the one or more antennas <NUM> and <NUM>. In the present disclosure, the one or more antennas <NUM> and <NUM> may be a plurality of physical antennas or a plurality of logical antennas (e.g., antenna ports).

The one or more transceivers <NUM> and <NUM> may convert received user data, control information, radio signals/channels, etc., from RF band signals into baseband signals in order to process received user data, control information, radio signals/channels, etc., using the one or more processors <NUM> and <NUM>. The one or more transceivers <NUM> and <NUM> may convert the user data, control information, radio signals/channels, etc., processed using the one or more processors <NUM> and <NUM> from the base band signals into the RF band signals. For example, the one or more transceivers <NUM> and <NUM> can up-convert OFDM baseband signals to OFDM signals by their (analog) oscillators and/or filters under the control of the one or more processors <NUM> and <NUM> and transmit the up-converted OFDM signals at the carrier frequency. The one or more transceivers <NUM> and <NUM> may receive OFDM signals at a carrier frequency and down-convert the OFDM signals into OFDM baseband signals by their (analog) oscillators and/or filters under the control of the one or more processors <NUM> and <NUM>.

In the implementations of the present disclosure, a UE may operate as a transmitting device in uplink (UL) and as a receiving device in downlink (DL). In the implementations of the present disclosure, a BS may operate as a receiving device in UL and as a transmitting device in DL. Hereinafter, for convenience of description, it is mainly assumed that the first wireless device <NUM> acts as the UE, and the second wireless device <NUM> acts as the BS. For example, the processor(s) <NUM> connected to, mounted on or launched in the first wireless device <NUM> may be configured to perform the UE behavior according to an implementation of the present disclosure or control the transceiver(s) <NUM> to perform the UE behavior according to an implementation of the present disclosure. The processor(s) <NUM> connected to, mounted on or launched in the second wireless device <NUM> may be configured to perform the BS behavior according to an implementation of the present disclosure or control the transceiver(s) <NUM> to perform the BS behavior according to an implementation of the present disclosure.

The communication unit <NUM> may include a communication circuit <NUM> and transceiver(s) <NUM>. For example, the communication circuit <NUM> may include the one or more processors <NUM> and <NUM> of <FIG> and/or the one or more memories <NUM> and <NUM> of <FIG>. For example, the transceiver(s) <NUM> may include the one or more transceivers <NUM> and <NUM> of <FIG> and/or the one or more antennas <NUM> and <NUM> of <FIG>. The control unit <NUM> is electrically connected to the communication unit <NUM>, the memory unit <NUM>, and the additional components <NUM> and controls overall operation of each of the wireless devices <NUM> and <NUM>. For example, the control unit <NUM> may control an electric/mechanical operation of each of the wireless devices <NUM> and <NUM> based on programs/code/commands/information stored in the memory unit <NUM>.

As an example, the control unit <NUM> may be configured by a set of a communication control processor, an application processor (AP), an electronic control unit (ECU), a graphical processing unit, and a memory control processor. As another example, the memory unit <NUM> may be configured by a RAM, a DRAM, a ROM, a flash memory, a volatile memory, a non-volatile memory, and/or a combination thereof.

Referring to <FIG>, a UE <NUM> may correspond to the first wireless device <NUM> of <FIG> and/or the wireless device <NUM> or <NUM> of <FIG>.

The processor <NUM> may be configured to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure. The processor <NUM> may be configured to control one or more other components of the UE <NUM> to implement the descriptions, functions, procedures, suggestions, methods and/or operational flowcharts disclosed in the present disclosure. Layers of the radio interface protocol may be implemented in the processor <NUM>. The processor <NUM> may include ASIC, other chipset, logic circuit and/or data processing device. The processor <NUM> may be an application processor. The processor <NUM> may include at least one of a digital signal processor (DSP), a central processing unit (CPU), a graphics processing unit (GPU), a modem (modulator and demodulator). An example of the processor <NUM> may be found in SNAPDRAGONTM series of processors made by Qualcomm®, EXYNOSTM series of processors made by Samsung®, A series of processors made by AppleO, HELIOTM series of processors made by MediaTek®, ATOMTM series of processors made by Intel® or a corresponding next generation processor.

The transceiver <NUM> is operatively coupled with the processor <NUM>, and transmits and/ or receives a radio signal.

The LTE/LTE-A based cell operates in an Evolved Universal Terrestrial Radio Access (E-UTRA) operating band. And, the NR-based cell operates in a NR band. Here, the DC may be called as EN-DC.

The Table <NUM> is an example of E-UTRA operating bands.

Table <NUM> shows examples of operating bands on FR1. Operating bands shown in Table <NUM> is a reframing operating band that is transitioned from an operating band of LTE/ LTE-A. This operating band may be referred to as FR1 operating band.

Table <NUM> shows examples of operating bands on FR2. The following table shows operating bands defined on a high frequency. This operating band is referred to as FR2 operating band.

Power class <NUM>, <NUM>, <NUM>, and <NUM> are specified based on UE types as follows:.

A carrier aggregation system is now described.

A carrier aggregation system aggregates a plurality of component carriers (CCs). A meaning of an existing cell is changed according to the above carrier aggregation. According to the carrier aggregation, a cell may signify a combination of a downlink component carrier and an uplink component carrier or an independent downlink component carrier.

Further, the cell in the carrier aggregation may be classified into a primary cell, a secondary cell, and a serving cell. The primary cell signifies a cell operated in a primary frequency. The primary cell signifies a cell which UE performs an initial connection establishment procedure or a connection reestablishment procedure or a cell indicated as a primary cell in a handover procedure. The secondary cell signifies a cell operating in a secondary frequency. Once the RRC connection is established, the secondary cell is used to provide an additional radio resource.

As described above, the carrier aggregation system may support a plurality of component carriers (CCs), that is, a plurality of serving cells unlike a single carrier system.

The carrier aggregation system may support a cross-carrier scheduling. The cross-carrier scheduling is a scheduling method capable of performing resource allocation of a PDSCH transmitted through other component carrier through a PDCCH transmitted through a specific component carrier and/or resource allocation of a PUSCH transmitted through other component carrier different from a component carrier basically linked with the specific component carrier.

Carrier aggregation can also be classified into inter-band CA and intra-band CA. The inter-band CA is a method of aggregating and using each CC existing in different operating bands, and the intra-band CA is a method of aggregating and using each CC in the same operating band. In addition, the CA technology is more specifically, intra-band contiguous CA, intra-band non-contiguous CA and inter-band discontinuity. Non-Contiguous) CA.

<FIG> illustrates a concept view of an example of intra-band contiguous CA. <FIG> illustrates a concept view of an example of intra-band non-contiguous CA.

The CA may be split into the intra-band contiguous CA shown in <FIG> and the intra-band non-contiguous CA shown in <FIG>.

<FIG> illustrates a concept view of an example of a combination of a lower frequency band and a higher frequency band for inter-band CA. <FIG> illustrates a concept view of an example of a combination of similar frequency bands for inter-band CA.

The inter-band carrier aggregation may be separated into inter-band CA between carriers of a low band and a high band having different RF characteristics of inter-band CA as shown in <FIG> and inter-band CA of similar frequencies that may use a common RF terminal per component carrier due to similar RF (radio frequency) characteristics as shown in <FIG>.

For inter-band carrier aggregation, a carrier aggregation configuration is a combination of operating bands, each supporting a carrier aggregation bandwidth class.

Recently, a scheme for simultaneously connecting UE to different base stations, for example, a macro cell base station and a small cell base station, is being studied. This is called dual connectivity (DC).

In DC, the eNodeB for the primary cell (Pcell) may be referred to as a master eNodeB (hereinafter referred to as MeNB). In addition, the eNodeB only for the secondary cell (Scell) may be referred to as a secondary eNodeB (hereinafter referred to as SeNB).

A cell group including a primary cell (Pcell) implemented by MeNB may be referred to as a master cell group (MCG) or PUCCH cell group <NUM>. A cell group including a secondary cell (Scell) implemented by the SeNB may be referred to as a secondary cell group (SCG) or PUCCH cell group <NUM>.

Meanwhile, among the secondary cells in the secondary cell group (SCG), a secondary cell in which the UE can transmit Uplink Control Information (UCI), or the secondary cell in which the UE can transmit a PUCCH may be referred to as a super secondary cell (Super SCell) or a primary secondary cell (Primary Scell; PScell).

<FIG> are exemplary diagrams illustrating exemplary architectures for services of the next generation mobile communication.

Referring to <FIG>, the UE is connected to LTE/LTE-A based cells and NR based cells in a dual connectivity (DC) manner.

The NR-based cell is connected to a core network for existing <NUM> mobile communication, that is, an evolved packet core (EPC).

Referring to <FIG>, unlike <FIG>, the LTE/LTE-A based cell is connected to a core network for the <NUM> mobile communication, that is, a next generation (NG) core network.

The service scheme based on the architecture as illustrated in <FIG> is called non-standalone (NSA).

Referring to <FIG>, the UE is connected only to NR-based cells. The service method based on such an architecture is called standalone (SA).

On the other hand, in the NR, it may be considered that the reception from the base station uses a downlink subframe, and the transmission to the base station uses an uplink subframe. This method may be applied to paired spectra and unpaired spectra. A pair of spectra means that the two carrier spectra are included for downlink and uplink operations. For example, in a pair of spectra, one carrier may include a downlink band and an uplink band that are paired with each other.

<FIG> illustrates an example of situation in which uplink signal transmitted via an uplink operating bands affects reception of a downlink signal via downlink operating bands.

In <FIG>, an Intermodulation Distortion (IMD) may mean amplitude modulation of signals containing two or more different frequencies, caused by nonlinearities or time variance in a system. The intermodulation between frequency components will form additional components at frequencies that are not just at harmonic frequencies (integer multiples) of either, like harmonic distortion, but also at the sum and difference frequencies of the original frequencies and at sums and differences of multiples of those frequencies.

Referring to <FIG>, an example in which a CA is configured in a terminal is shown. For example, the terminal may perform communication through the CA based on three downlink operating bands (UL Band X, Y, Z) and two uplink operating bands (DL Band X, Y).

As shown in <FIG>, in a situation in which three downlink operating bands are configured and two uplink operating bands are configured by the CA, the terminal may transmit an uplink signal through two uplink operating bands. In this case, a harmonics component and an intermodulation distortion (IMD) component occurring based on the frequency band of the uplink signal may fall into its own downlink band. That is, in the example of <FIG>, when the terminal transmits the uplink signal, the harmonics component and the intermodulation distortion (IMD) component may occur, which may affect the downlink band of the terminal itself.

The terminal should be configured to satisfy a reference sensitivity power level (REFSENS) which is the minimum average power for each antenna port of the terminal when receiving the downlink signal.

When the harmonics component and/or IMD component occur as shown in the example of <FIG>, there is a possibility that the REFSENS for the downlink signal may not be satisfied due to the uplink signal transmitted by the UE itself.

For example, the REFSENS may be set such that the downlink signal throughput of the terminal is <NUM>% or more of the maximum throughput of the reference measurement channel. When the harmonics component and/or IMD component occur, there is a possibility that the downlink signal throughput is reduced to <NUM>% or less of the maximum throughput.

When a Power class <NUM> terminal performs NR CA or EN-DC operation, self-interference occurring in the UE is analyzed, and a relaxed standard for sensitivity thereof may be proposed.

Therefore, it is determined whether the harmonics component and the IMD component of the terminal occur, and when the harmonics component and/or IMD component occur, the maximum sensitivity degradation (MSD) value is defined for the corresponding frequency band, so relaxation for REFSENS in the reception band may be allowed in the reception band due to its own transmission signal. Here, the MSD may mean the maximum allowed reduction of the REFSENS. When the MSD is defined for a specific operating band of the terminal where the CA or DC is configured, the REFSENS of the corresponding operating band may be relaxed by the amount of the defined MSD.

The disclosure of the present specification provides results of analysis about self-interference in a terminal configured with CA and NR EN-DC and amount of relaxation to sensitivity.

The reference sensitivity power level REFSENS is the minimum mean power applied to each one of the UE antenna ports for all UE categories, at which the throughput shall meet or exceed the requirements for the specified reference measurement channel.

For EN-DC, E-UTRA and NR single carrier, CA, and MIMO operation of REFSENS requirements defined apply to all downlink bands of EN-DC configurations listed, unless sensitivity degradation exception is allowed in this clause of this specification. Allowed exceptions specified in this clause also apply to any higher order EN-DC configuration combination containing one of the band combinations that exception is allowed for. Reference sensitivity exceptions are specified by applying maximum sensitivity degradation (MSD) into applicable REFSENS requirement. EN-DC REFSENS requirements shall be met for NR uplink transmissions using QPSK DFT-s-OFDM waveforms as defined. Unless otherwise specified UL allocation uses the lowest SCS allowable for a given channel BW. Limits on configured maximum output power for the uplink shall apply.

In case of intra-band EN-DC the receiver REFSENS requirements in this clause do not apply for <NUM> and <NUM> E-UTRA carriers. For the case of inter-band EN-DC with a single carrier per cell group and multi-carrier per cell group, in addition to the E-UTRA and NR single carrier, CA, and MIMO operation of REFSENS requirements defined the REFSENS requirements specified therein also apply with both downlink carriers and both uplink carriers active unless sensitivity exceptions are allowed in this clause of this specification.

For inter-band EN-DC, the reference sensitivity requirement with both uplink carriers active is allowed to be verified for only a single inter-band EN-DC configuration per NR band.

For intra-band contiguous EN-DC configurations, the reference sensitivity power level REFSENS is the minimum mean power applied to each one of the UE antenna ports at which the throughput for the carrier(s) of the E-UTRA and NR CGs shall meet or exceed the requirements for the specified E-UTRA and NR reference measurement channels. The reference sensitivity requirements apply with all uplink carriers and all downlink carriers active for EN-DC configuration and Uplink EN-DC configuration, as supported by the UE. For EN-DC configurations where uplink is not available in either the MCG or the SCG or for EN-DC configurations where the UE only supports single uplink operation, reference sensitivity requirements apply with single uplink transmission. The downlink carrier(s) from the cell group with uplink shall be configured closer to the uplink operating band than any of the downlink carriers from the cell group without uplink.

Sensitivity degradation is allowed for Intra-band contiguous EN-DC configurations, the reference sensitivity is defined only for the specific uplink and downlink test points and E-UTRA and NR single carrier requirements do not apply.

Sensitivity degradation is allowed for a band if it is impacted by UL harmonic interference from another band part of the same EN-DC configuration. Reference sensitivity exceptions for the victim band (high) are specified with uplink configuration of the aggressor band (low).

Sensitivity degradation is allowed for a band if it is impacted by receiver harmonic mixing due to another band part of the same EN-DC configuration. Reference sensitivity exceptions for the victim band (low) are specified with uplink configuration of the agressor band (high).

Sensitivity degradation is allowed for a band if it is impacted by UL of another band part of the same EN-DC configuration due to cross band isolation issues. Reference sensitivity exceptions for the victim band are specified with uplink configuration of the agressor band specified.

For EN-DC configurations in NR FR1 the UE may indicate capability of not supporting simultaneous dual uplink operation due to possible intermodulation interference overlapping in frequency to its own primary downlink channel bandwidth if.

In the case for EN-DC configurations in NR FR1 for which the intermodulation products caused by dual uplink operation do not interfere with its own primary downlink channel bandwidth as defined in Annex I the UE is mandated to operate in dual and triple uplink mode.

For these test points the reference sensitivity levels are relaxed by the amount of the parameter MSD.

Tables <NUM> and <NUM> summarize the EN- DC band combinations with self-interference problems for 3DL/2UL EN-DC operation.

For the MSD analysis of these 3DL/2UL EN-DC NR UE, it is assumed that the parameters and attenuation levels based on current UE RF FE components as shown in below tables.

In rel-<NUM> DC of LTE x Bands (xDL/1UL, x=<NUM>, <NUM>, <NUM>, <NUM>) and NR <NUM> Bands (2DL/1UL) basket WI, RAN4 also consider shared antenna RF architectures for NSA UE in sub-<NUM> as LTE system. So we consider shared antenna RF architecture for general NSA DC UE to derive MSD levels. Also separate antenna RF architecture is considered in some specific band combinations which was considered in general NR RF session.

For the MSD analysis of these several DC band combinations between LTE and NR, we assume the following parameters and attenuation levels based on current UE RF FE components.

Table <NUM> shows the RF Front-end component parameters.

Table <NUM> shows the isolation levels according to the RF component. Table <NUM> shows UE RF Front-end component isolation parameters.

Based on these assumptions and test configuration, the present disclosure proposes the MSD levels as below. Table <NUM> shows a proposed MSD test configuration and results by IMD problems.

Offset of MSD values in table <NUM> is ±α, and α may be <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>,.

there may be IMD3 produced by Band <NUM> and NR band n5 that impact the reference sensitivity of NR band n77. Also there are IMD3 & IMD5 produced by Band <NUM> and NR band n77 that impact the reference sensitivity of NR band n5.

The required MSD levels and test configuration are shown in the following Table.

There is IMD3 products produced by Band n5 and <NUM> that impact the reference sensitivity of NR n77. If the UE transmits uplink signals via uplink bands of operating bands n5 and <NUM>, IMD products are produced and then a reference sensitivity in operating band n77 is degraded. Therefore, a value of MSD is needed to apply the reference sensitivity. Hereinafter, MSD tables are same with the above description.

Table <NUM> shows DC band combination of LTE 1DL/1UL + inter-band NR 2DL/1UL.

Based on the co-existence studies of DC_8A-n28A and DC_8A-n79A, 5th order IMD generated by dual uplink of Band <NUM> + Band n28 may also fall into own Rx of band n79 and 5th order IMD generated by dual uplink of Band <NUM> + Band n79 may also fall into own Rx of band n28.

For DC_8_n28-n79, the △TIB,c and △RIB,c values are given in the tables below.

As mentioned in above, IMD5 of B8 and n28 to Band n79 Rx and IMD5 of B8 and n79 to Band n28 Rx may need to be addressed for REFSENS relaxation. The following values may be proposed:.

<FIG> illustrate exemplary IMD by a combination of band <NUM>, n28 and n79.

Table <NUM> shows reference sensitivity exceptions due to dual uplink operation for EN-DC in NR FR1 (three bands).

There may be IMD3 produced by Band <NUM> and NR band n12 that impact the reference sensitivity of NR band n77. Also IMD4 product impacted to the n77. But the MSD by IMD4 is not specified.

The required MSD level and test configuration are shown in the following Table.

There may be IMD3 produced by Band <NUM> and NR band n71 that impact the reference sensitivity of NR band n77. Also IMD4 product impacted to the n77. But the MSD by IMD4 is not specified.

There may be IMD2 produced by Band <NUM> and NR band n2 that impact the reference sensitivity of NR band n41.

There may be IMD5 produced by Band <NUM> and NR band n28 that impact the reference sensitivity of NR band n75.

For remaining MSD analysis for NR CA_n28A-n74A, CA_n74A-n77A, the following MSD based on the simulation assumptions may be proposed.

Table <NUM> shows coexistence analysis for NR CA band combinations in Rel-<NUM>.

For the MSD analysis of these several NR CA combinations, the following parameters and attenuation levels based on current UE RF FE components as following tables may be assumed. Tables <NUM> and <NUM> show the RF component isolation parameters to derive MSD level at sub-<NUM>. Tables <NUM> and <NUM> show UE RF Front-end component parameters.

Table <NUM> shows the isolation levels according to the RF component. Table <NUM> shows UE RF Front-end component parameters.

Based on these assumptions, the MSD levels as below in Tables <NUM> and <NUM> may be proposed.

<FIG> illustrates exemplary IMD by a combination of band n3, n77 and n79.

Tables <NUM> and <NUM> show Proposed MSD test configuration and results for self desense problems.

Another NR DC band combos for DC_8A-41A_n77A or DC_8A-41C_n77A, the proposed MSD and test configuration may be proposed as follow.

±α tolerance may be applied to the MSD values shown in the tables <NUM>-<NUM>, <NUM>-<NUM>, <NUM>-<NUM>. For example, α is <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>,. may be <NUM>. That is, the range of MSD values proposed in the present specification may include MSD values to which a tolerance of ±α is applied. The following drawings are created to explain specific embodiments of the present disclosure. The names of the specific devices or the names of the specific signals/messages/fields shown in the drawings are provided by way of example, and thus the technical features of the present disclosure are not limited to the specific names used in the following drawings.

<FIG> is a flow chart showing an example of a procedure of a terminal according to the present disclosure.

Referring to <FIG>, steps S1210 to S1230 are shown. Operations described below may be performed by the terminal.

For reference, step S1210 may not always be performed when the terminal performs communication. For example, step S1210 may be performed only when the reception performance of the terminal is tested.

In step S1210, the terminal may preset the above proposed MSD value. For example, the terminal may preset the MSD values in Table <NUM>. For example, for the combination of the DC_8A-n28A-n79A downlink band and the DC_8A-n79A uplink band, an MSD of <NUM> dB may be applied to the reference sensitivity of the downlink band n28.

In step S1220, the terminal may transmit the uplink signal.

When the combination of the DC_8A-n28A-n79A downlink band and the DC_8A-n9A uplink band is configured in the terminal, the terminal may transmit the uplink signal through the uplink operating bands <NUM> and n79.

In step S1230, the terminal may receive the downlink signal.

The terminal may receive the downlink signal based on the reference sensitivity of the downlink band n28, to which the MSD value is applied.

When the combination of the DC_8A-n28A-n79A downlink band and the DC_8A-n79A uplink band is configured in the terminal, the terminal may receive the downlink signal through the downlink operating band n28.

For reference, the order in which steps S1220 and S1230 are performed may be different from that shown in FIG. For example, step S1230 may be performed first and then step S1220 may be performed. Alternatively, step S1220 and step S1230 may be performed simultaneously. Alternatively, the time when step S1220 and step S1230 may be may overlap partially.

Hereinafter, an apparatus in mobile communication, according to some embodiments of the present disclosure, will be described.

For example, a base station may include a processor, a transceiver, and a memory.

For example, the processor may be configured to be coupled operably with the memory and the processor.

The processor may be configured to transmitting an uplink signal via at least two bands among three bands; and receiving a downlink signal, wherein the at least two bands are configured for an Evolved Universal Terrestrial Radio Access (E-UTRA) - New Radio (NR) Dual Connectivity (EN-DC), wherein a value of Maximum Sensitivity Degradation (MSD) is applied to a reference sensitivity for receiving the downlink signal, wherein the value of the MSD is pre-configured for a first combination of bands <NUM>, n5 and n77, a second combination of band <NUM>, n28 and n79, a third combination of bands <NUM>, n12 and n77, a fourth combination of bands <NUM>, n71 and n77, a fifth combination of bands <NUM>, n2 and n41, a sixth combination of bands <NUM>, n28 and n75.

Hereinafter, a processor in mobile communication, according to some embodiments of the present disclosure, will be described.

Hereinafter, a non-transitory computer-readable medium has stored thereon a plurality of instructions for a wireless communication system, according to some unclaimed examples of the present disclosure, will be described.

According to the present disclosure, the technical features of the present disclosure could be embodied directly in hardware, in a software executed by a processor, or in a combination of the two. For example, a method performed by a wireless device in a wireless communication may be implemented in hardware, software, firmware, or any combination thereof. For example, a software may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other storage medium.

Some example of storage medium is coupled to the processor such that the processor can read information from the storage medium. For other example, the processor and the storage medium may reside as discrete components.

The computer-readable medium may include a tangible and non-transitory computer-readable storage medium.

For example, non-transitory computer-readable media may include random access memory (RAM) such as synchronous dynamic random access memory (SDRAM), read-only memory (ROM), non-volatile random access memory (NVRAM), electrically erasable programmable read-only memory (EEPROM), FLASH memory, magnetic or optical data storage media, or any other medium that can be used to store instructions or data structures. Non-transitory computer-readable media may also include combinations of the above.

In addition, the method described herein may be realized at least in part by a computer-readable communication medium that carries or communicates code in the form of instructions or data structures and that can be accessed, read, and/or executed by a computer.

According to some unclaimed examples, a non-transitory computer-readable medium has stored thereon a plurality of instructions. The stored a plurality of instructions may be executed by a processor of a base station.

Claim 1:
A device configured to operate in a wireless system, the device comprising:
a transceiver configured with an Evolved Universal Terrestrial Radio Access, E-UTRA, - New Radio, NR, Dual Connectivity, EN-DC,
wherein the EN-DC is configured to use three bands;
a processor operably connectable to the transceiver,
wherein the processer is configured to:
control the transceiver to receive a downlink signal via one band among the three band,
control the transceiver to transmit an uplink signal via at least two bands among the three bands,
wherein a value of Maximum Sensitivity Degradation, MSD, is applied to a reference sensitivity for the one band,
wherein, based on i) the three bands are bands <NUM>, n28 and n79 and ii) the one band is n79, the value of the MSD is <NUM> dB,
wherein, based on i) the three bands are bands <NUM>, n28 and n79 and ii) the one band is n28, the value of the MSD is <NUM> dB,
wherein, based on i) the three bands are bands <NUM>, n28 and n75 and ii) the one band is n75, the value of the MSD is <NUM> dB.