WO2022250258A1 - 수신 차원을 결정하는 전자 장치 및 전자 장치의 동작 방법 - Google Patents
수신 차원을 결정하는 전자 장치 및 전자 장치의 동작 방법 Download PDFInfo
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- WO2022250258A1 WO2022250258A1 PCT/KR2022/003473 KR2022003473W WO2022250258A1 WO 2022250258 A1 WO2022250258 A1 WO 2022250258A1 KR 2022003473 W KR2022003473 W KR 2022003473W WO 2022250258 A1 WO2022250258 A1 WO 2022250258A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/36—Transmission power control [TPC] using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
Definitions
- the present disclosure relates to an electronic device for determining a reception dimension and a method of operating the electronic device. Specifically, the present disclosure relates to an electronic device and an operation of the electronic device for determining a reception dimension that outputs maximum throughput in an open radio access network (O-RAN) system in which a radio unit (RU) and a digital unit (DU) are separated. It's about how.
- OF-RAN open radio access network
- the 5G communication system or pre-5G communication system is called a Beyond 4G Network (Beyond 4G Network) communication system or a long-term evolution (LTE) system and a post-LTE system.
- Beyond 4G Network Beyond 4G Network
- LTE long-term evolution
- the 5G communication system is implemented in a mmWave band (eg, a band of 6 gigabytes (6 GHz) or more) in addition to the band used by LTE (a band of 6 gigabytes (6 GHz) or less) is being considered
- a mmWave band eg, a band of 6 gigabytes (6 GHz) or more
- LTE a band of 6 gigabytes (6 GHz) or less
- beamforming, massive MIMO, Full Dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, and large scale antenna technologies are being discussed.
- a base station that provides mobile communication service is an integral type in which the data processing unit (digital unit, or distributed unit, DU) and the radio unit (remote unit, RU) of the base station are installed together at the cell site. has been implemented However, since the base station in which the DU and RU are implemented in an integrated form was not suitable for the needs of mobile communication operators who want to build a number of cell sites according to the increase in users and traffic, a centralized RAN (radio radio C-RAN) improved this. access network) or cloud RAN) structure appeared.
- a centralized RAN radio C-RAN
- C-RAN has a structure in which DUs are centrally placed in one physical location and only RUs are left at cell sites that transmit and receive radio signals with actual terminals.
- the DUs and RUs can be connected with optical cables or coaxial cables.
- an interface standard for communication between them is required, and standards such as Common Public Radio Interface (CPRI) are currently used between the RU and the DU.
- CPRI Common Public Radio Interface
- a base station implemented with the current C-RAN/fronthaul structure cannot satisfy fronthaul requirements including data rate and bandwidth.
- a method of separating the functions of a base band unit (BBU) and a remote radio head (RRH) differently from now is being reviewed at home and abroad.
- BBU base band unit
- RRH remote radio head
- BER bit error rate
- the error vector magnitude (EVM) is 17.5% for quadrature phase shift keying (QPSK). should not exceed 8% in 64QAM (quadrature amplitude modulation).
- 3GPP 3rd Generation Partnership Project
- O-RAN Open Radio Access Network
- the O-RAN system logically separates functions that can be performed by a base station (evolved Node B (eNB)) of an existing 4th generation mobile communication system and a base station (next generation Node B (gNB)) of a 5th generation mobile communication system. It is a network system implemented based on the implemented O-RAN standard.
- the international organization leading Open RAN (O-RAN) is the O-RAN Alliance.
- Major base station vendors as well as major mobile carriers in the world are participating and developing standard technologies in connection with 3GPP standards.
- An open radio access network (O-RAN) system may logically divide functions performed in a base station. Some functions may be implemented to be processed by a radio unit (RU) of a base station (gNB), and some other functions may be implemented to be processed by a digital unit (DU) of the base station. According to one embodiment, the DU may perform a function of processing a base band signal (eg, Function 7-2).
- a base band signal eg, Function 7-2
- the DU can receive baseband signals corresponding to signals received from all antennas.
- the required bandwidth of the interface implemented between the DU and RU increases as the number of antennas connected to the RU increases.
- the maximum bandwidth supported by the interface implemented between the DU and RU may be smaller than the required bandwidth.
- an embodiment of the present invention provides an electronic device for determining an optimal reception dimension between a RU and a DU in response to a channel environment and a scheduling situation in an interface environment between a limited DU and an RU, and an operating method of the electronic device is to do
- an electronic device includes a communication module and a processor for receiving a signal from at least one user device, and the processor determines reception quality of a signal obtained from the communication module and obtains an offset corresponding to a channel characteristic of the signal.
- a method for operating an electronic device includes an operation of determining reception quality of a signal obtained from a communication module, an operation of obtaining an offset corresponding to a channel characteristic of the signal, an offset corresponding to a target reception dimension and a target reception dimension based on the reception quality. Determining a corresponding expected reception quality, provisionally allocating the target reception dimension and frequency resources to at least one user device, based on the expected reception quality corresponding to the target reception dimension and the size of the frequency resource The method may include determining an expected throughput for at least one user device and determining an optimal reception dimension based on the expected throughput.
- the electronic device can improve the performance of the O-RAN system by adaptively changing the reception dimension according to the channel environment.
- the electronic device can improve the performance of the O-RAN system by adaptively changing the reception dimension according to scheduling conditions.
- the electronic device may not perform reception dimensionality reduction according to the channel environment and scheduling situation, and may preserve array gain and diversity gain obtained with spatial resources.
- FIG. 1 illustrates an example of a 5G NR core system according to an embodiment of the present disclosure
- O-RAN open radio access network
- FIG. 3 is a diagram illustrating an example of connection between an RIC in an O-RAN system and a plurality of O-CU-CPs, O-CU-UPs, and O-DUs according to an embodiment of the present disclosure.
- FIG. 4 is a diagram illustrating an example of function split in a wireless communication system according to an embodiment of the present disclosure.
- FIG. 5 is a diagram illustrating structures of RUs and DUs and a fronthaul interface between RU-DUs in an O-RAN system according to an embodiment of the present disclosure.
- FIG. 6 is a flowchart illustrating an operation in which a DU determines an optimal reception dimension according to an embodiment of the present disclosure.
- FIG. 7A and 7B are diagrams for explaining an operation of determining an optimal reception dimension for each user device in an O-RAN system according to an embodiment of the present disclosure.
- FIG. 8 is a flowchart illustrating an operation in which a DU determines reception quality based on a provisionally allocated reception dimension according to an embodiment of the present disclosure.
- 9A is a graph illustrating the corresponding throughput according to the reception dimension in an O-RAN system, according to an embodiment of the present disclosure.
- 9B is a graph illustrating throughput according to types of O-RAN systems, according to an embodiment of the present disclosure.
- uplink refers to a radio link through which a terminal transmits data or control signals to a base station
- downlink refers to a radio link through which a base station transmits data or control signals to a terminal.
- the base station is a subject that performs resource allocation of the terminal, and at least one of an evolved Node B (eNode B), a Node B, a base station (BS), a generation Node B (gNB) wireless access unit, a base station controller, or a node on the network can be
- the terminal may include a user equipment (UE), a mobile station (MS), a cellular phone, a smart phone, a computer, or a multimedia system capable of performing communication functions.
- the 5th generation communication system has been commercialized, providing users with high data rate services through 5G systems like 4G systems, and services that require high reliability for the Internet of Things and specific purposes. It is expected that wireless communication services with various purposes can be provided.
- O-RAN Open Radio Access Network Alliance
- 3GPP third generation partnership project
- O-RAN replaces existing 3GPP NEs, RU, DU, CU-CP (central unit-control plane), and CU-UP (central unit-user plane), respectively, with O-RU, O-DU, O-CU-CP, O-CU-UP is newly defined (which can be collectively referred to as an O-RAN base station), and additional RIC (near-real-time RAN Intelligent Controller) and NRT-RIC (non-real-time RAN Intelligent Controller) was standardized. Each O-DU and RIC, O-CU-CP and RIC, and O-CU-UP and RIC can be connected through Ethernet.
- interface standards for communication between O-DU and RIC, between O-CU-CP and RIC, and between O-CU-UP and RIC are required, and currently E2-DU, E2-CU-CP, and E2-CU-UP Standards such as O-DU, O-CU-CP, O-CU-UP and RIC may be used.
- FIG. 1 is a diagram illustrating an example of a 5G NR core system according to an embodiment of the present disclosure.
- the core network 160 includes a network function including an Access and Mobility Management Function (AMF) 130, a Session Management Function (SMF) 140), and a User Plane Function (UPF) 150. can do.
- AMF Access and Mobility Management Function
- SMF Session Management Function
- UPF User Plane Function
- Components in the core network 160 may be physically or software implemented components.
- the AMF 130 may provide a function for managing access and mobility in units of user terminals 120 .
- the AMF 130 performs a registration process of the user terminal 120 on the cellular communication network, mobility management of the user terminal 120 (eg, location check of the user terminal 120), communication between the user terminal 120 and the cellular communication network. Connection management can be performed.
- the SMF 140 establishes, modifies, or releases a session including a procedure for transmitting or receiving data between the user terminal 120 and the core network 160 ( release), and a session management operation including allocating an IP address of a user terminal may be performed.
- the UPF 150 may receive user data transmitted by the user terminal 120 through the base station 100 and transmit the received user data to an external server.
- the UPF 150 may transmit user data transmitted from an external server to the user terminal 120 through the base station 100 .
- the base station 100 functions as a physical physical A radio unit (RU) 110 that performs a physical layer function, a digital unit (DU) (102) that is responsible for medium access control (MAC) and radio link control (RLC) functions, and radio resource control (RRC) and PDCP It may include at least one component of a central unit-control plane (CU-CP) 104 and a central unit-user plane (CU-UP) 106 that are in charge of higher functions such as (Packet Data Convergence Protocol). Elements within the base station 100 may be physically or software-implemented elements.
- the CU-CP 104 may be a component that performs functions related to a control plane.
- the CU-CP 104 is a component that performs functions related to connection setup between the user terminal 120 and the base station 100, mobility and security of the user terminal 120 can
- the CU-UP 106 may perform user data transmission/reception related functions as functions related to a user plane.
- the base station 100 is connected to the AMF 130, and at least one AMF 130 may be implemented on the core network 160.
- O-RAN open radio access network
- the O-RAN system logically separates and implements functions that can be performed by a base station (eNB) of an existing 4G mobile communication system and a base station (gNB) of a 5G mobile communication system. It may be a network system implemented based on standards.
- NRT-RIC non-real time RAN intelligent controller, 200
- RIC (near-real-time) RAN intelligent controller, 210)
- O-CU-CP (220
- O-CU- UP 230
- O-DU 240
- O-RU 260
- the O-CU including the O-CU-CP 220 and the O-CU-UP 230 has radio resource control (RRC), service data adaptation protocol (SDAP), and packet data convergence protocol (PDCP) protocol functions.
- RRC radio resource control
- SDAP service data adaptation protocol
- PDCP packet data convergence protocol
- O-CU-CP 220 is a logical node that provides functions of the control plane part of RRC and PDCP
- O-CU-UP 230 is a user plane of SDAP and PDCP.
- the O-CU-CP 220 is connected to an access and mobility management function (AMF) included in a 5G network (5G core) through an NGAP interface.
- AMF access and mobility management function
- the O-DU 240 functions of RLC, MAC, and higher physical layer (high-PHY, which is based on 7-2x fronthaul split). It can be a logical component that provides Although not shown in FIG. 2, the O-RU connected to the O-DU 240 has a lower physical layer (low-PHY, which is based on a 7-2x fronthaul split) function and RF processing (eg, signal amplification and/or or a logical component that provides modulation of a signal).
- RF processing eg, signal amplification and/or or a logical component that provides modulation of a signal.
- O-RU 260 connected to O-DU 240 is a logical node providing low-PHY functions and RF processing. Although each logical node is shown in the singular number in FIG. 2, each logical node may be connected in plural numbers. For example, a plurality of O-RUs 260 may be connected to one O-DU 240, and one O-CU A plurality of O-DUs 240 may be connected to the -UP 230.
- the NRT-RIC 200 may be a logical component enabling non-real-time control and optimization of RAN elements and resources, model training and update, etc. have.
- the RIC 210 provides near-real-time data based on data collected from the O-DU 240, O-CU-CP 220, and O-CU-UP 230 through the E2 interface. It can be a logical component that enables control and optimization of RAN elements and resources.
- the present invention is not limited by the names of the components described above, and the configuration of the present invention can be applied to logical components that perform the functions described above.
- the logical components may be physically located at the same or different locations, and their functions may be provided by the same physical device (for example, a processor, control unit, etc.) or by another physical device. have.
- the function of at least one logical element described above may be provided through virtualization in one physical device.
- FIG. 3 is a diagram illustrating an example of connection between an RIC in an O-RAN system and a plurality of O-CU-CPs, O-CU-UPs, and O-DUs according to an embodiment of the present disclosure.
- the RIC 300 may be connected to a plurality of O-CU-CPs 320, O-CU-UPs 310, and O-DUs 330.
- An interface between the RIC 300 and the O-DU 330 may be defined as the E2-DU 340.
- An interface between the RIC 300 and the O-CU-CP 320 may be defined as the E2-CP 350.
- An interface between the RIC 300 and the O-CU-UP 310 may be defined as the E2-UP 360.
- An interface between the O-CU-CP 320 and the O-DU 330 may be defined as F1.
- An interface between the O-CU-UP 310 and the O-DU 330 may be defined as F1 370.
- the O-RAN system may be implemented by including a plurality of RICs.
- a plurality of RICs may be implemented with a plurality of hardware located in the same physical location or through virtualization using one hardware.
- FIG. 4 is a diagram illustrating an example of function split in a wireless communication system according to various embodiments of the present disclosure.
- wireless communication technology develops (e.g., 5G (5th generation) communication system (or introduction of NR (new radio) communication system)
- the frequency band used increases more and more, and the cell radius of the base station becomes very small)
- the amount of transmitted data increased by more than 10 times, and the transmission capacity of the wired network transmitted through the fronthaul greatly increased. Therefore, in order to lower the transmission capacity of the wired network and reduce the installation cost of the wired network, some functions of the modem of the DU are converted into RUs.
- the base station In the case of downlink (DL) transmitting a signal to a terminal through a wireless network, the base station sequentially performs channel encoding/scrambling, modulation, layer mapping, antenna mapping, RE mapping, digital beamforming (eg, precoding), IFFT conversion/CP insertion, and RF conversion can be performed.
- DL downlink
- UL uplink
- the base station In the case of uplink (UL) receiving signals from a terminal through a wireless network, the base station sequentially performs RF conversion, FFT conversion/CP removal, digital beamforming (pre-combining), and RE decoder. Mapping, channel estimation, layer demapping, demodulation, and decoding/desscrambling can be performed. Separation of uplink functions and downlink functions may be defined in various types according to the need between vendors, discussions on standards, and the like according to the above-described trade-off.
- the first functional separation 405 can be a separation of RF function and PHY function.
- the first functional separation is that the PHY function in the RU is not substantially implemented, and may be referred to as Option 8, for example.
- the second function separation 410 allows the RU to perform IFFT transform/CP insertion on DL and FFT transform/CP removal on UL of the PHY functions, and the DU to perform the remaining PHY functions.
- the second function separation 410 may be referred to as Option 7-1.
- the third function separation 420a allows the RU to perform IFFT conversion/CP insertion in DL and FFT conversion/CP removal in UL and digital beamforming of the PHY function, and the DU to perform the remaining PHY functions.
- the third functional separation 420a may be referred to as Option 7-2x Category A.
- Fourth function separation (420b) The RU performs up to digital beamforming in both DL and UL, and the DU performs higher PHY functions after digital beamforming.
- the fourth functional separation 420b may be referred to as Option 7-2x Category B.
- the fifth function separation 425 allows the RU to perform RE mapping (or RE demapping) in both the DL and UL, and the DU to perform upper PHY functions after RE mapping (or RE demapping).
- the fifth function separation 425 may be referred to as Option 7-2.
- the sixth functional separation 430 allows the RU to perform up to modulation (or demodulation) in both DL and UL, and the DU to perform subsequent higher PHY functions up to modulation (or demodulation).
- the sixth functional separation 430 may be referred to as Option 7-3.
- the seventh functional separation 440 performs up to encoding/scrambling (or decoding/desrambling) in both DL and UL, and allows the DU to perform subsequent higher PHY functions up to modulation (or demodulation).
- the seventh functional separation 440 may be referred to as Option 6.
- function separation in a relatively high layer may be required to reduce fronthaul capacity.
- functional separation eg, the sixth functional separation 430
- the DU Appropriate separation of functions may be required according to the arrangement and implementation method of the RU and the RU.
- the third function separation 420a or lower function Separation eg, second functional separation 410
- the fourth functional separation 420b or more functional separation eg, the sixth functional separation 430
- various embodiments in the present disclosure are described based on the third functional separation 420a or the fourth functional separation 420b unless otherwise limited, but configuration of embodiments through other functional separations is not excluded.
- FIG. 5 is a diagram illustrating structures of an RU 500 and a DU 550 and a fronthaul interface 540 between RU-DUs in an O-RAN system according to an embodiment of the present disclosure.
- a radio unit (RU) 500 may be the RU of FIG. 1 (eg, the RU 110 of FIG. 1 ).
- the RU 500 may be a Massive MIMO Unit (MMU) including a massive multiple-input and multiple-output (MIMO) antenna.
- MMU Massive MIMO Unit
- MIMO massive multiple-input and multiple-output
- the RU 500 may be in charge of a lower layer function of a wireless network.
- the RU 500 may perform part of a PHY layer and an RF function.
- part of the PHY layer is performed at a level relatively lower than that of the DU 550 among functions of the PHY layer, and may include, for example, IFFT/FFT conversion, CP insertion/removal, and digital beamforming.
- IFFT/FFT conversion CP insertion/removal
- digital beamforming digital beamforming
- the RU 500 may include an RF communication module 510, a frequency processing unit 520, and/or a digital beamforming unit 530.
- the RF communication module 510 may obtain a signal from at least one user terminal through an antenna.
- the RF communication module 510 may receive and/or transmit signals with at least one user terminal through M massive multiple-input and multiple-output (MIMO) antennas #1 to #M.
- MIMO massive multiple-input and multiple-output
- the RF communication module 510 may receive an uplink (UL) from at least one user terminal.
- the RF communication module 510 may perform RF conversion for uplink.
- the RF communication module 510 may convert an analog form of uplink acquired from an antenna into a digital form.
- the frequency processing unit 520 may process a signal obtained from the RF communication module 510 .
- the frequency processor 520 may perform cyclic prefix (CP) removal and/or fast fourier transform (FFT) on the signal received by the RF communication module 510 .
- CP cyclic prefix
- FFT fast fourier transform
- the frequency processing unit 520 may convert a time domain signal into a frequency domain signal.
- the digital beamformer 530 may generate a combined signal by pre-combining at least one signal.
- the digital beamformer 530 may adjust (eg, dimension reduction) a reception dimension (Rx dimension) through pre-combining. For example, by pre-combining M signals obtained from M antennas at a ratio of n:1, the reception dimension received by the DU 550 can be adjusted to M/n Rx dimension.
- the reception dimension (Rx dimension) may correspond to the number of layers of a signal received by a digital unit (DU) 550 connected to a radio unit (RU) 500 and a fronthaul interface (540).
- the reception dimension may correspond to the number of signals that the DU 550 can receive and process.
- the interface capacity of the fronthaul interface 540 may be greater than or equal to a product of a reception dimension (Rx dimension) and a system bandwidth (system bandwidth). Accordingly, the reception dimension (Rx dimension) may be smaller than or equal to a value obtained by dividing the system bandwidth by the interface capacity.
- the interface capacity may be a value according to physical characteristics of the fronthaul interface 540 implemented between the RU 500 and the DU 550.
- the digital beamformer 530 may pre-combine signals to correspond to a designated reception dimension and/or an optimal reception dimension determined by the dimension determiner 590 .
- the digital beamformer 530 pre-combines M signals received from M antennas at a ratio of M/N: 1 in response to the specified reception dimension and/or optimal reception dimension being N. By inning, N combined signals can be generated.
- the digital beamformer 530 may transmit the pre-combined signal to the DU 550 through the fronthaul interface 540 .
- the digital beamformer 530 may transmit N combined signals to the DU 550 through the fronthaul interface 540 .
- the DU 550 may be the DU of FIG. 1 (eg, the DU 102 of FIG. 1 ).
- the DU 550 may be in charge of higher layer functions of a wireless network.
- the DU 550 may perform a function of a MAC layer and a part of a PHY layer.
- a part of the PHY layer is performed at a higher level among the functions of the PHY layer, for example, channel encoding (or channel decoding), scrambling (or descrambling), modulation (or demodulation), layer mapping (layer mapping) (or layer demapping).
- channel encoding or channel decoding
- scrambling or descrambling
- modulation or demodulation
- layer mapping layer mapping
- the DU 550 may include a modem 560, a channel quality manager 570, a provisional allocation unit 580, and/or a dimension determination unit 590.
- the modem 560 may process a signal obtained from the RU 500 through the fronthaul interface 540 .
- the modem 560 performs RE demapping, channel estimation (ch. estimate), layer demapping, demodulation, and/or decoding/decoding for the acquired signal. Descrambling can be performed.
- the modem 560 may measure the reception quality of the processed signal. For example, the modem 560 processes a combined signal pre-combined to correspond to a current reception dimension by the digital beamformer 530 with respect to a signal obtained from at least one user device, and processes the processed signal. reception quality can be measured.
- the modem 560 uses RSRP (reference signal received power) method, RSSI (received signal strength indication) method, and RSRP to measure signal strength by averaging the strength of reference signals belonging to a specific cell among frequency bands.
- RSSI reference signal received power
- RSSI received signal strength indication
- RSRP reference signal received quality
- SNR signal to noise ratio
- the reception quality of the received signal may be measured based on at least one of signal-to-interface-plus noise ratio (SINR) methods for measuring reception quality based on a ratio of interference and noise.
- SINR signal-to-interface-plus noise ratio
- the channel quality manager 570 may determine an expected reception quality according to a target reception dimension.
- the channel quality manager 570 may determine channel characteristics of the acquired signal. For example, the channel quality manager 570 may determine channel characteristics (eg, channel model and/or electric field characteristics) based on a signal obtained from at least one user device.
- channel characteristics eg, channel model and/or electric field characteristics
- the channel quality manager 570 may obtain an offset stored in a memory (not shown).
- the channel quality manager 570 may obtain an offset table corresponding to channel characteristics.
- the offset may be a value corresponding to a predicted reception quality difference corresponding to a difference between the current reception dimension and the target reception dimension.
- Table 1 may be an example of an offset table according to an embodiment.
- the channel quality manager 570 may obtain an offset value of 3 dB in response to that the current reception dimension is 4Rx dimension and the target reception dimension is 8Rx dimension, and the current reception dimension is 4Rx dimension , and an offset value of 6 dB may be obtained corresponding to the target reception dimension being 16Rx dimension.
- the channel quality manager 570 updates the offset table based on the reception quality obtained from the modem 560.
- the channel quality manager 570 may determine an expected reception quality corresponding to a target reception dimension based on the offset.
- the channel quality manager 570 may determine the expected reception quality corresponding to the target reception dimension by adding an offset value corresponding to the target reception dimension to reception quality in the current reception dimension obtained from the modem 560. For example, the channel quality manager 570 adds an offset (eg, 3dB) corresponding to a target reception dimension (eg, 8Rx dimension) to reception quality (eg, A) in the current reception dimension (eg, 4Rx dimension) The value may be determined as expected reception quality (eg, A + 3dB) in a target reception dimension (eg, 8Rx dimension).
- an offset eg, 3dB
- the channel quality manager 570 may list up expected reception quality according to a target reception dimension.
- Table 2 may be an exemplary list of expected reception qualities corresponding to target reception dimensions, according to an embodiment.
- the channel quality manager 570 determines the expected reception quality as A in response to the target reception dimension being 4Rx Dimension, and determines the expected reception quality as A in response to the target reception dimension being 8Rx Dimension. It is determined as A+3dB, and the expected reception quality may be determined as A+6dB corresponding to the target reception dimension being 16Rx Dimension.
- An expected throughput may be output through pre-scheduling.
- the provisional allocator 580 may provisionally allocate target reception dimensions and frequency resources to at least one user device. In this case, the sum of values obtained by multiplying the target reception dimension for a plurality of provisionally allocated user devices by the size of the frequency resource may be less than or equal to the interface bandwidth.
- the tentative assignment unit 580 may determine an expected throughput for the tentatively assigned combination.
- the provisional allocator 580 determines, for at least one user device, the expected reception quality according to the tentatively assigned target reception dimension (eg, MCS level based on the expected SINR) and the size of the tentatively assigned frequency resource block (Resource block size) to determine the expected throughput.
- the tentative assignment unit 580 may determine the sum of expected throughputs of tentatively assigned user devices as the expected throughput for the tentatively assigned combination.
- the provisional assignment unit 580 may determine the expected throughput for the tentatively assigned combination based on Equation 1.
- Rx Dimension) is 1, a receiveable MCS level (modulation and coding scheme level)
- RB Nk,l is a frequency after provisional assignment corresponding to the fact that the target reception dimension (Rx Dimension) of user device k (UE #k) is 1
- the size of the resource block (RB size) and TBS may be the size of the transport block (transport block size) based on the MCS level and the size of the resource block.
- Equation 1 for a user equipment k (UE #k), for a transport block size (TBS) based on an MCS level according to a target reception dimension of l and a size of a frequency resource block, k is 0 It may be an equation for obtaining a sum of TBS values in the case of from to K-1. For example, the sum of TBS obtained in Equation 1 may correspond to the expected throughput for the provisionally allocated combination.
- UE #k user equipment k
- TBS transport block size
- the provisional allocator 580 temporarily allocates the same target reception dimension to a plurality of user devices in response to the number of user devices being equal to or greater than the specified number, and the reception quality according to the target reception dimension (eg, MCS level based on SINR) ) and the size of the provisionally allocated frequency resource block (Resource block size, RBS), the expected throughput may be determined.
- the provisional assignment unit 580 may determine the expected throughput based on Equation 2.
- N is the target reception dimension equally applied to the user equipment
- MCS k,N is the MCS level (modulation) that can be received when the target reception dimension (Rx Dimension) of the kth user equipment (UE #K) is N. and coding scheme level)
- RB k,N is the size of the resource block after allocation corresponding to the target reception dimension (Rx Dimension) of the kth user device (UE #k) is N
- TBS is the MCS level and the size of the transport block based on the size of the resource block.
- Equation 2 when the target reception dimension is N, k is from 0 to K-1 for the transport block size (TBS) based on the MCS level for the kth user device and the size of the resource block. It may be an equation for obtaining a sum of TBS values in the case of For example, the sum of TBS obtained in Equation 2 may correspond to the expected throughput.
- TBS transport block size
- Table 3 is an example of an expected throughput determined for a target reception dimension combination for at least one user device, according to an embodiment.
- the provisional assignment unit 580 provides a first combination (eg, 4Rx Dimension and 9RB for the first user device, 8Rx Dimension and 4RB for the second user device, and 16Rx dimension and 4RB for the third user device). 2RB provisional allocation) can be determined as B.
- the provisional allocator 580 sets the expected throughput for the second combination (eg, 8Rx Dimension and 4RB to the first user device, 8Rx Dimension and 4RB to the second user device, and 4Rx dimension and 9RB to the third user device) to C can be determined by The provisional allocator 580 sets the expected throughput to D for the third combination (eg, 4Rx Dimension and 4RB to the first user device, 4Rx Dimension and 10RB to the second user device, and 8Rx dimension and 5RB to the third user device).
- the dimension determiner 590 may determine an optimal reception dimension based on the expected throughput.
- the dimension determiner 590 may determine a signal slot unit (eg, TTI).
- the optimal reception dimension can be determined for each.
- the dimension determiner 590 may determine a combination having the highest expected throughput as an optimal reception dimension combination for at least one user device, among expected throughputs determined for combinations of target reception dimensions for each user device.
- the dimension determiner 590 may transfer information related to an optimal reception dimension combination for at least one user device to the digital beamformer 530 and/or the modem 560 .
- the digital beamformer 530 may pre-combine at least one signal according to an optimal reception dimension combination for at least one user device
- the modem 560 may pre-combine signals for at least one user device.
- the received signal may be processed according to the optimal reception dimension combination.
- FIG. 6 is a flowchart illustrating an operation of determining an optimal reception dimension by a DU 550 according to an embodiment of the present disclosure.
- a DU 550 may measure reception quality of a signal received in a current reception dimension.
- the DU 550 may measure reception quality of an acquired signal.
- the DU 550 may process a combined signal pre-combined to correspond to a current reception dimension with respect to signals acquired from at least one user device, and measure reception quality of the processed signal.
- the DU 550 uses RSRP (reference signal received power) method, RSSI (received signal strength indication) method, and RSRP to measure signal strength by averaging the strength of reference signals belonging to a specific cell among frequency bands.
- RSSI reference signal received power
- RSSI received signal strength indication
- RSRP reference signal received quality
- SNR signal to noise ratio
- the reception quality of the received signal may be measured based on at least one of signal-to-interface-plus noise ratio (SINR) methods for measuring reception quality based on a ratio of interference and noise.
- SINR signal-to-interface-plus noise ratio
- the DU 550 may, in operation 620, obtain an offset corresponding to a channel characteristic from a memory.
- the DU 550 may determine channel characteristics of the acquired signal. For example, the DU 550 may determine channel characteristics (eg, channel model and/or electric field characteristics) based on signals acquired from at least one user device.
- channel characteristics eg, channel model and/or electric field characteristics
- the DU 550 may obtain an offset stored in a memory (not shown).
- the DU 550 may obtain an offset table corresponding to channel characteristics.
- the DU 550 may determine an expected reception quality for each target reception dimension based on the measured reception quality and offset.
- the DU 550 may determine the reception quality corresponding to the target reception dimension based on the offset. For example, the DU 550 may determine the expected reception quality corresponding to the target reception dimension by adding an offset value corresponding to the target reception dimension to reception quality in the current reception dimension.
- the DU 550 may list up expected reception quality according to target reception dimensions.
- the DU 550 may determine an expected throughput by provisionally allocating a target reception dimension and frequency resource to at least one user device.
- the DU 550 may provisionally allocate target reception dimensions and frequency resources to at least one user device.
- the sum of the product of the target reception dimension for each of the plurality of provisionally allocated user devices and the size of the frequency resource may be less than or equal to the interface bandwidth.
- the DU 550 may determine an expected throughput for a provisional assignment combination. For example, the DU 550 determines the expected reception quality according to the provisionally allocated target reception dimension (e.g., MCS level based on SINR) and the size of the allocated frequency resource block (Resource block size) for at least one user device. Based on this, the expected throughput can be determined. For example, the DU 550 may determine the sum of expected throughputs of provisionally assigned user devices as the expected throughput for the provisionally assigned combination. For example, the DU 550 may determine the expected throughput for the provisionally allocated combination based on Equation 1 and/or Equation 2.
- the provisionally allocated target reception dimension e.g., MCS level based on SINR
- Resource block size allocated frequency resource block
- the DU 550 may determine an optimal reception dimension based on the expected throughput.
- the DU 550 may determine a combination having the highest expected throughput as an optimal reception dimension combination for at least one user device, among expected throughputs determined for combinations of target reception dimensions for each user device.
- the DU 550 may change the reception dimension to the determined optimal reception dimension.
- the DU 550 may deliver information related to an optimal reception dimension combination for at least one user device to the RU 500.
- FIGS. 7A and 7B are diagrams illustrating an operation of determining an optimal reception dimension for each user device in an O-RAN system according to various embodiments of the present disclosure.
- the O-RAN system may acquire signals from a user device a (UE #a) and/or a user device b (UE #b).
- UE #a user device a
- UE #b user device b
- the O-RAN system may acquire signals from user equipment a (UE #a) and/or user equipment b (UE #b) through antennas #1 to #M.
- UE #a user equipment a
- UE #b user equipment b
- the digital beamformer 530 pre-combines M signals obtained from user device a (UE #a) and/or user device b (UE #b). to generate a combined signal.
- the digital beamformer 530 configures user device a (UE #a) and/or user device b (UE) to correspond to the designated reception dimension and/or the optimum reception dimension determined by the dimension determination unit 590.
- Each of the M signals obtained from #b) may be pre-combined.
- the digital beamformer 530 pre-combines M signals received from M antennas at a ratio of M/N: 1 in response to the specified reception dimension and/or optimal reception dimension being N. By inning, N combined signals can be generated.
- the digital beamformer 530 pre-combines signals obtained from user device a (UE #a) to generate N_a combined signals, and generates N_a combined signals obtained from user device b (UE #b). Signals may be pre-combined to generate N_b combined signals.
- the digital beamformer 530 may transmit the pre-combined signal to the DU 550 through the fronthaul interface 540 .
- the digital beamformer 530 may transmit N combined signals to the DU 550 through the fronthaul interface 540 .
- the modem 560 may process a signal acquired from the RU 500 and measure reception quality of the signal. For example, the modem 560 processes N_a combined signals pre-combined to correspond to the current reception dimension by the digital beamformer 530 with respect to the signal obtained from the user device a (UE #a). and measure the reception quality (SINR_a) of the processed signal. For example, the modem 560 processes N_b combined signals pre-combined to correspond to the current reception dimension by the digital beamformer 530 with respect to the signal obtained from the user device b (UE #b). and measure the reception quality (SINR_b) of the processed signal.
- N_a combined signals pre-combined to correspond to the current reception dimension by the digital beamformer 530 with respect to the signal obtained from the user device b (UE #b).
- the channel quality manager 570 may determine an expected reception quality according to a target reception dimension.
- the channel quality manager 570 may perform channel characteristics (eg, a channel model and/or electric field) with respect to signals obtained from user device a (UE #a) and/or user device b (UE #b). characteristics) can be determined. For example, the channel quality manager 570 obtains reception quality (SINR_a) corresponding to user device a (UE #a) obtained from the modem 560 and/or reception quality corresponding to user device b (UE #b). Characteristics of each channel may be determined based on (SINR_b).
- SINR_a reception quality corresponding to user device a
- UE #b reception quality corresponding to user device b
- Characteristics of each channel may be determined based on (SINR_b).
- the channel quality manager 570 may obtain an offset stored in a memory (not shown). For example, the channel quality manager 570 may obtain offset tables corresponding to channel characteristics of each of user device a (UE #a) and/or user device b (UE #b).
- the channel quality manager 570 may determine the reception quality corresponding to the target reception dimension based on the offset. For example, the channel quality manager 570 may determine expected reception quality corresponding to the target reception dimension by adding an offset value corresponding to the target reception dimension to the reception quality of the current reception dimension obtained from the modem 560.
- a channel quality manager 570 transmits information to a target interface for each user device a (UE #a) and/or user device b (UE #b). Corresponding reception quality can be obtained.
- the tentative allocator 580 may tentatively allocate resources according to the user device and the target reception dimension, and output an expected throughput.
- the provisional allocator 580 may provisionally allocate target reception dimensions and frequency resources to user device a (UE #a) and/or user device b (UE #b).
- the sum of the product of Dimension_b) and the frequency resource may be less than or equal to the interface bandwidth.
- the provisional assignment unit 580 may determine an expected throughput for a provisional assignment combination. For example, the provisional allocator 580 determines the expected reception quality according to the tentatively assigned target reception dimension (eg, based on the expected SINR) for the user device a (UE #a) and/or the user device b (UE #b). Expected T-put may be determined based on the MCS level) and the allocated resource block size. For example, the provisional allocator 580 may determine the sum of the expected throughputs of the tentatively assigned user device a (UE #a) and/or the user device b (UE #b) as the expected throughput for the provisionally assigned combination. . For example, the tentative assignment unit 580 may determine the expected throughput for the tentatively assigned combination based on Equation 1.
- the tentative assignment unit 580 may determine the expected throughput for the tentatively assigned combination based on Equation 1.
- the dimension determiner 590 may determine an optimal reception dimension based on expected throughput.
- the dimension determiner 590 may determine an optimal reception dimension for each slot unit of a signal.
- the dimension determiner 590 selects a combination with the highest expected throughput for the optimal reception dimension for user device a (UE #a) and/or for user device b (UE #b). It can be determined as the optimal reception dimension for .
- FIG. 8 is a flowchart illustrating an operation in which a DU 550 determines reception quality based on a provisionally assigned reception dimension according to an embodiment.
- the DU 550 may determine reception quality of a signal acquired in a current reception dimension.
- the DU 550 may measure reception quality of an acquired signal.
- the DU 550 may process a combined signal pre-combined to correspond to a current reception dimension with respect to signals acquired from at least one user device, and measure reception quality of the processed signal.
- the DU 550 uses RSRP (reference signal received power) method, RSSI (received signal strength indication) method, and RSRP to measure signal strength by averaging the strength of reference signals belonging to a specific cell among frequency bands.
- RSSI reference signal received power
- RSSI received signal strength indication
- RSRP reference signal received quality
- SNR signal to noise ratio
- the reception quality of the received signal may be measured based on at least one of signal-to-interface-plus noise ratio (SINR) methods for measuring reception quality based on a ratio of interference and noise.
- SINR signal-to-interface-plus noise ratio
- the DU 550 may correct the reception quality value based on the reference reception dimension.
- the DU 550 may determine channel characteristics of the acquired signal. For example, the DU 550 may determine channel characteristics (eg, channel model and/or electric field characteristics) for a signal acquired from at least one user device. For example, the DU 550 may correct the reception quality measured for the signal obtained in the current reception dimension (Rx dimension) based on the basic Rx dimension, and based on the corrected reference reception quality value Thus, channel characteristics can be determined. For example, the DU 550 may determine a channel characteristic (eg, weak electric field) based on a range (eg, A) in which the corrected reference reception quality value is included.
- a channel characteristic eg, weak electric field
- the DU 550 may, in operation 830, obtain an offset table based on the corrected reception quality value.
- the DU 550 may perform moving averaging or IIR filtering on the corrected reception quality value.
- the DU 550 may obtain an offset stored in a memory (not shown).
- the DU 550 may obtain an offset table corresponding to channel characteristics.
- the DU 550 may determine an expected reception quality for each target reception dimension based on the offset table.
- the DU 550 may determine the expected reception quality corresponding to the target reception dimension based on the offset. For example, the DU 550 may determine the expected reception quality corresponding to the target reception dimension by adding an offset value corresponding to the target reception dimension to the IIR-filtered reception quality value.
- the DU 550 may determine an MCS level for each target reception dimension.
- the DU 550 may determine an expected MCS level according to a target reception dimension for at least one user device. For example, the DU 550 may determine an MCS level based on expected reception quality (eg, SINR) determined for each target reception dimension. For example, the DU 550 may determine the MCS level by adding a channel correction value (eg, OLRC offset) according to PUSCH reception success/failure to an MCS mapping value corresponding to the expected reception quality.
- a channel correction value eg, OLRC offset
- 9A is a graph illustrating the corresponding throughput according to the reception dimension in an O-RAN system, according to an embodiment of the present disclosure.
- the x-axis of the graph may indicate an index related to reception performance (SNR, signal-to-noise-rate), and the Y-axis may indicate throughput (T-put).
- SNR reception performance
- T-put throughput
- the throughput graph (Low Rx Mode T-put Curve) corresponding to the low reception dimension mode in a strong electric field (eg, a range where the SNR value of the x-axis is high), a lot of frequency resources can be allocated, and a lot of frequency resources can be allocated to receive As the performance is high, a high MCS level can be obtained, so a high maximum throughput can be obtained.
- a medium electric field and a weak electric field eg, a range where the SNR value of the x-axis is low
- throughput may decrease as reception performance deteriorates.
- a throughput graph (Middle Rx Mode T-put curve) corresponding to the medium reception dimension mode
- frequency resources that can be allocated are reduced in preparation for a low reception dimension mode, so that the maximum throughput can be lowered.
- the throughput can be increased compared to the low reception level mode.
- the maximum throughput may be low in the strong field because the frequency resources that can be allocated are small, but the reception performance is high in the weak field. Throughput can be increased by this.
- the throughput may be higher by the coverage extension than the throughput when the reception dimension is fixed.
- 9B is a graph illustrating throughput according to types of O-RAN systems, according to an embodiment of the present disclosure.
- the x-axis of the graph may indicate a reception performance related indicator (SS-RSRP), and the Y-axis may indicate throughput (T-put).
- SS-RSRP reception performance related indicator
- T-put throughput
- System Bandwidth may be 60Mhz.
- a graph corresponding to 4:1 MRC (maximum ration combining) + 16R MMSE (minimum mean-squared error) may be a graph corresponding to a conventional O-RAN system (function split 7-2).
- a graph corresponding to 60Mhz modem capa may be a graph corresponding to a case where the capacity of the fronthaul interface 540 is 60Mhz. Referring to the graph, if the reception dimension (Rx Dimension) is doubled, available frequency resources may be 1/2 times.
- a graph corresponding to 100Mhz modem capa may be a graph corresponding to a case where the capacity of the fronthaul interface 540 is 100Mhz. Referring to the graph, even if the Rx Dimension is doubled, available frequency resources may be greater than 1/2 times.
- a graph corresponding to Rx DDA on w.o modem limit may be a graph corresponding to a case where the entire capacity of the fronthaul interface 540 is used without modem processing capacity limitation.
- a graph corresponding to 16R MMSEx 4 + log-likelihood ratio (LLR) combining may be a graph corresponding to a function split 7-3 system.
- An electronic device includes a communication module (eg, the fronthaul interface 540 of FIG. 5 ) and a processor (eg, the DU 550 of FIG. 5 ) that receives a signal from at least one user device.
- the processor 550 determines the reception quality of the signal obtained from the communication module 540, obtains an offset corresponding to the channel characteristics of the signal, and receives the signal when receiving the dimension and the target reception dimension.
- the processor 550 may determine a channel characteristic of the signal based on the reception quality of the signal acquired through the communication module 540 .
- the processor 550 may determine an expected reception quality corresponding to the target reception dimension based on a value obtained by adding an offset corresponding to the target reception dimension to the reception quality.
- the processor 550 determines the reception quality based on a signal-to-interference-noise-rate (SINR) for the signal obtained through the communication module 540, , an MCS level corresponding to the target reception dimension may be determined based on the SINR and the offset.
- SINR signal-to-interference-noise-rate
- the processor 550 determines a transport block size (TBS) based on an MCS level corresponding to the target reception dimension and the frequency resource, and determines the expected throughput based on the TBS. can decide
- the communication module 540 receives signals from a plurality of user devices, and the processor 550 temporarily allocates signals to the plurality of user devices in a plurality of combinations, and according to the combination, The sum of the throughputs corresponding to the user devices of can be determined as the expected throughput of the combination.
- the processor 550 may identify a combination having the highest expected throughput and determine an optimal reception dimension corresponding to the identified combination.
- the processor 550 may transmit information related to the optimal reception dimension to a radio unit (RU) through the communication module 540 .
- RU radio unit
- the processor 550 may process a signal obtained from the communication module 540 based on the optimal reception dimension.
- the processor 550 may determine the optimum reception dimension in units of slots.
- the processor 550 may provisionally allocate the same reception dimension to the plurality of user devices.
- An operating method of an electronic device includes an operation of determining reception quality of a signal acquired from a communication module 540, an operation of obtaining an offset corresponding to a channel characteristic of the signal, and an offset corresponding to a target reception dimension. and determining an expected reception quality corresponding to the target reception dimension based on the reception quality, provisionally allocating the target reception dimension and frequency resources to at least one user device, and the expected reception quality corresponding to the target reception dimension.
- an operation of determining a channel characteristic of the signal based on the reception quality of the signal acquired through the communication module 540 may be further included.
- the operating method of the electronic device may further include determining an expected reception quality corresponding to the target reception dimension based on a value obtained by adding an offset corresponding to the target reception dimension to the reception quality. .
- an operation of determining the reception quality based on a signal-to-interference-noise-rate (SINR) for the signal obtained through the communication module 540 and the and determining an MCS level corresponding to the target reception dimension based on the SINR and the offset is performed.
- SINR signal-to-interference-noise-rate
- determining a transport block size (TBS) based on an MCS level corresponding to the target reception dimension and the frequency resource, and determining the expected throughput based on the TBS action may be included.
- An operating method of an electronic device may include determining a combination having the highest expected throughput and determining an optimal reception dimension corresponding to the identified combination.
- an operation of transmitting information related to the optimal reception dimension to a radio unit (RU) through the communication module 540 may be further included.
- the operating method of the electronic device may further include processing a signal obtained from the communication module 540 based on the optimal reception dimension.
- An operation method of an electronic device may include determining the optimal reception dimension in units of slots.
- An operation method of an electronic device may include provisionally allocating the same reception dimension to the plurality of user devices.
- Electronic devices may be devices of various types.
- the electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance.
- a portable communication device eg, a smart phone
- a computer device e.g., a smart phone
- a portable multimedia device e.g., a portable medical device
- a camera e.g., a portable medical device
- a camera e.g., a portable medical device
- a camera e.g., a portable medical device
- a camera e.g., a camera
- a wearable device e.g., a smart bracelet
- first, second, or first or secondary may simply be used to distinguish a given component from other corresponding components, and may be used to refer to a given component in another aspect (eg, importance or order) is not limited.
- a (e.g., first) component is said to be “coupled” or “connected” to another (e.g., second) component, with or without the terms “functionally” or “communicatively.”
- the certain component may be connected to the other component directly (eg by wire), wirelessly, or through a third component.
- module used in various embodiments of this document may include a unit implemented in hardware, software, or firmware, and is interchangeable with terms such as, for example, logic, logical blocks, parts, or circuits.
- a module may be an integrally constructed component or a minimal unit of components or a portion thereof that performs one or more functions.
- the module may be implemented in the form of an application-specific integrated circuit (ASIC).
- ASIC application-specific integrated circuit
- a storage medium eg, internal memory (#36) or external memory (#38)
- a machine eg, electronic device (#01)
- a machine eg, electronic device (#01)
- It may be implemented as software (eg, program #40) including one or more instructions.
- a processor eg, processor #20
- a device eg, electronic device #01
- the one or more instructions may include code generated by a compiler or code executable by an interpreter.
- the device-readable storage medium may be provided in the form of a non-transitory storage medium.
- the storage medium is a tangible device and does not contain a signal (e.g. electromagnetic wave), and this term refers to the case where data is stored semi-permanently in the storage medium. It does not discriminate when it is temporarily stored.
- a signal e.g. electromagnetic wave
- the method according to various embodiments disclosed in this document may be included and provided in a computer program product.
- Computer program products may be traded between sellers and buyers as commodities.
- a computer program product is distributed in the form of a device-readable storage medium (eg compact disc read only memory (CD-ROM)), or through an application store (eg Play Store TM ) or on two user devices ( It can be distributed (eg downloaded or uploaded) online, directly between smart phones.
- a device-readable storage medium eg compact disc read only memory (CD-ROM)
- an application store eg Play Store TM
- It can be distributed (eg downloaded or uploaded) online, directly between smart phones.
- at least part of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium such as a manufacturer's server, an application store server, or a relay server's memory.
- each component (eg, module or program) of the above-described components may include a single object or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. have.
- one or more components or operations among the aforementioned corresponding components may be omitted, or one or more other components or operations may be added.
- a plurality of components eg modules or programs
- the integrated component may perform one or more functions of each of the plurality of components identically or similarly to those performed by a corresponding component of the plurality of components prior to the integration. .
- the actions performed by a module, program, or other component are executed sequentially, in parallel, iteratively, or heuristically, or one or more of the actions are executed in a different order, or omitted. or one or more other actions may be added.
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Abstract
Description
| 현재 수신 차원 변경할 수신 차원 |
4Rx Dimension | 8Rx Dimension | 16Rx Dimension |
| 4Rx Dimension | 0 | -3dB | -6dB |
| 8Rx Dimension | 3dB | 0 | -3dB |
| 16Rx Dimension | 6dB | 3dB | 0 |
| 타겟 수신 차원 | 기대 수신 품질 |
| 4Rx Dimension | A |
| 8Rx Dimension | A+3dB |
| 16Rx Dimension | A+6dB |
| 기대 스루풋 | |
| 제 1 조합 | B |
| 제 2 조합 | C |
| 제 3 조합 | D |
Claims (15)
- 전자 장치에 있어서,적어도 하나의 사용자 장치로부터 신호를 수신하는 통신 회로; 및프로세서를 포함하고,상기 프로세서는상기 통신 회로로부터 획득한 신호의 수신 품질을 결정하고,상기 신호의 채널 특징에 대응되는 오프셋을 획득하고,상기 신호를 수신할 때의 수신 차원 및 타겟 수신 차원의 차이 값에 대응하는 신호의 품질 차이를 지시하는 오프셋 및 상기 수신 품질에 기반하여 상기 타겟 수신 차원에 대응하는 기대 수신 품질을 결정하고,상기 적어도 하나의 사용자 장치에 대하여 상기 타겟 수신 차원 및 주파수 자원을 가할당하고,상기 타겟 수신 차원에 대응하는 상기 기대 수신 품질 및 상기 주파수 자원의 크기에 기반하여 상기 적어도 하나의 사용자 장치에 대한 기대 스루풋(throughput)을 결정하고,상기 기대 스루풋에 기반하여 상기 타겟 수신 차원을 결정하고,상기 결정된 타겟 수신 차원을 통해 상기 사용자 장치로부터 데이터를 수신하거나, 전송하는전자 장치.
- 제 1 항에 있어서,상기 프로세서는상기 통신 회로를 통하여 획득한 상기 신호의 수신 품질에 기반하여 상기 신호의 채널 특징을 결정하는전자 장치.
- 제 1 항에 있어서,상기 프로세서는상기 수신 품질에 상기 타겟 수신 차원에 대응하는 오프셋을 더한 값에 기반하여 상기 타겟 수신 차원에 대응하는 기대 수신 품질을 결정하는전자 장치.
- 제 1 항에 있어서,상기 프로세서는상기 통신 회로을 통하여 획득한 상기 신호에 대하여 SINR(signal-to-interference-noise-rate)에 기반하여 상기 수신 품질을 결정하고,상기 SINR 및 상기 오프셋에 기반하여 상기 타겟 수신 차원에 대응하는 MCS(modulation and coding scheme) 레벨을 결정하는전자 장치.
- 제 4 항에 있어서,상기 프로세서는상기 타겟 수신 차원에 대응하는 MCS 레벨 및 상기 주파수 자원에 기반하여 TBS(transport block size)를 결정하고,상기 TBS에 기반하여 상기 기대 스루풋을 결정하는전자 장치.
- 제 1 항에 있어서,상기 통신 회로는 복수의 사용자 장치로부터 신호를 수신하고,상기 프로세서는상기 복수의 사용자 장치에 대하여 복수의 조합으로 가할당하고,조합에 따라 복수의 사용자 장치에 대응하는 스루풋의 합을 상기 조합의 상기 기대 스루풋(throughput)으로 결정하는전자 장치.
- 제 6 항에 있어서,상기 프로세서는상기 기대 스루풋이 가장 높은 조합을 확인하고,상기 확인된 조합에 대응하는 최적 수신 차원을 결정하는전자 장치.
- 제 1 항에 있어서,상기 프로세서는상기 최적 수신 차원과 관련된 정보를 상기 통신 회로를 통하여 RU(radio unit)으로 송신하는전자 장치.
- 제 8 항에 있어서,상기 프로세서는상기 최적 수신 차원에 기반하여 상기 통신 회로로부터 회득한 신호를 처리하는전자 장치.
- 제 1 항에 있어서,상기 프로세서는상기 최적 수신 차원을 슬롯 단위로 결정하는전자 장치.
- 제 6 항에 있어서,상기 프로세서는상기 복수의 사용자 장치에 대하여 동일한 수신 차원을 가할당하는전자 장치.
- 전자 장치의 동작 방법에 있어서,통신 회로로부터 획득한 신호의 수신 품질을 결정하는 동작;상기 신호의 채널 특징에 대응되는 오프셋을 획득하는 동작;타겟 수신 차원에 대응하는 오프셋 및 상기 수신 품질에 기반하여 상기 타겟 수신 차원에 대응하는 기대 수신 품질을 결정하는 동작;적어도 하나의 사용자 장치에 대하여 상기 타겟 수신 차원 및 주파수 자원을 가할당하는 동작;상기 타겟 수신 차원에 대응하는 상기 기대 수신 품질 및 상기 주파수 자원의 크기에 기반하여 상기 적어도 하나의 사용자 장치에 대한 기대 스루풋(throughput)을 결정하는 동작; 및상기 기대 스루풋에 기반하여 최적 수신 차원을 결정하는 동작을 포함하는전자 장치의 동작 방법.
- 제 12 항에 있어서,상기 통신 회로를 통하여 획득한 상기 신호의 수신 품질에 기반하여 상기 신호의 채널 특징을 결정하는 동작을 더 포함하는전자 장치의 동작 방법.
- 제 12 항에 있어서,상기 수신 품질에 상기 타겟 수신 차원에 대응하는 오프셋을 더한 값에 기반하여 상기 타겟 수신 차원에 대응하는 기대 수신 품질을 결정하는 동작을 더 포함하는전자 장치의 동작 방법.
- 제 12 항에 있어서,상기 통신 회로를 통하여 획득한 상기 신호에 대하여 SINR(signal-to-interference-noise-rate)에 기반하여 상기 수신 품질을 결정하는 동작; 및상기 SINR 및 상기 오프셋에 기반하여 상기 타겟 수신 차원에 대응하는 MCS(modulation and coding scheme) 레벨을 결정하는 동작을 포함하는전자 장치의 동작 방법.
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| EP22811452.6A EP4340243A4 (en) | 2021-05-26 | 2022-03-11 | Electronic device for determining reception dimension, and operation method of electronic device |
| CN202280045342.8A CN117561685A (zh) | 2021-05-26 | 2022-03-11 | 确定接收维数的电子装置和电子装置的运行方法 |
| US17/750,981 US12250709B2 (en) | 2021-05-26 | 2022-05-23 | Electronic device for determining reception dimension and operation method thereof |
| US19/056,207 US20250193918A1 (en) | 2021-05-26 | 2025-02-18 | Electronic device for determining reception dimension and operation method thereof |
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| KR1020210124345A KR102952630B1 (ko) | 2021-05-26 | 2021-09-16 | 수신 차원을 결정하는 전자 장치 및 전자 장치의 동작 방법 |
| KR10-2021-0124345 | 2021-09-16 |
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| WO2017105126A1 (ko) * | 2015-12-18 | 2017-06-22 | 삼성전자주식회사 | 무선 통신 시스템에서 비직교 다중 접속을 위한 장치 및 방법 |
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