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WO2025230154A1 - Appareil de réseau et procédé de détermination de puissance de transmission d'un terminal - Google Patents

Appareil de réseau et procédé de détermination de puissance de transmission d'un terminal

Info

Publication number
WO2025230154A1
WO2025230154A1 PCT/KR2025/004401 KR2025004401W WO2025230154A1 WO 2025230154 A1 WO2025230154 A1 WO 2025230154A1 KR 2025004401 W KR2025004401 W KR 2025004401W WO 2025230154 A1 WO2025230154 A1 WO 2025230154A1
Authority
WO
WIPO (PCT)
Prior art keywords
component carriers
power
component carrier
resource block
power information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/KR2025/004401
Other languages
English (en)
Korean (ko)
Inventor
나현종
신대규
조희남
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electronics Co Ltd
Original Assignee
Samsung Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020240123562A external-priority patent/KR20250157919A/ko
Application filed by Samsung Electronics Co Ltd filed Critical Samsung Electronics Co Ltd
Publication of WO2025230154A1 publication Critical patent/WO2025230154A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • 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
    • 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
    • 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
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • 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
    • H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
    • 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
    • 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]
    • H04W52/54—Signalisation aspects of the TPC commands, e.g. frame structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling

Definitions

  • the present disclosure relates to a network device and method for determining transmission power of a terminal.
  • a base station can determine time and/or frequency resources for transmitting data to multiple terminals based on scheduling.
  • the base station can determine not only the time and/or frequency resources but also the transmission power of the terminals.
  • a network device may include a transceiver, a memory storing one or more instructions and including a storage medium, and at least one processor including a processing circuit.
  • the one or more instructions when individually or collectively executed by the at least one processor, may cause the network device to identify a first component carrier having a lowest signal quality among the plurality of component carriers based on signal qualities for each of the plurality of component carriers, determine at least one resource block for the first component carrier based on a first throughput increase amount according to a power increase per unit frequency in the remaining component carriers excluding the first component carrier among the plurality of component carriers and a second throughput increase amount according to a frequency resource increase in the first component carrier, identify first power information for the first component carrier based on the at least one resource block, identify second power information for each of the remaining component carriers based on the first power information, receive an uplink signal from the terminal using the at least one resource block for the first component carrier according to the first power information, and receive at least one uplink signal from the terminal using the resource blocks for the
  • a method performed by a network device may include: identifying a first component carrier having the lowest signal quality among a plurality of component carriers based on signal qualities for each of the plurality of component carriers; determining at least one resource block for the first component carrier based on a first throughput increase amount according to a power increase per unit frequency in component carriers remaining from among the plurality of component carriers excluding the first component carrier and a second throughput increase amount according to a frequency resource increase in the first component carrier; identifying first power information for the first component carrier based on the at least one resource block; identifying second power information for each of the remaining component carriers based on the first power information; and receiving an uplink signal from the terminal using the at least one resource block for the first component carrier according to the first power information, and receiving at least one uplink signal from the terminal using resource blocks for the remaining component carriers according to the second power information.
  • a non-transitory computer-readable storage medium can store one or more programs.
  • the one or more programs may include instructions that, when executed by at least one processor of a network device, cause the network device to identify a first component carrier having the lowest signal quality among the plurality of component carriers based on signal qualities for each of the plurality of component carriers, determine at least one resource block for the first component carrier based on a first throughput increase amount according to an increase in power per unit frequency in the remaining component carriers excluding the first component carrier among the plurality of component carriers and a second throughput increase amount according to an increase in frequency resources in the first component carrier, identify first power information for the first component carrier based on the at least one resource block, identify second power information for each of the remaining component carriers based on the first power information, receive an uplink signal from the terminal using the at least one resource block for the first component carrier according to the first power information, and cause the network device to receive at least one uplink signal from the terminal using resource blocks for the remaining component carriers according to the second power information.
  • Figure 1 illustrates a wireless communication system
  • Figure 2a illustrates the interface between an upper network node and a lower network node.
  • Figure 2b illustrates the fronthaul interface of an O(open)-RAN(radio access network).
  • Figure 3a illustrates the functional configuration of an upper network node.
  • Figure 3b illustrates the functional configuration of a sub-network node.
  • Figure 4 illustrates an example of function split between DU and RU.
  • Figure 5 illustrates an example of a time-frequency domain resource structure supported by a wireless communication system.
  • Figure 6 illustrates examples of channels in a communication standard.
  • Figure 7 illustrates an example of the operation of a base station for controlling the transmission power of a terminal.
  • Figure 8 shows the power spectral efficiency per carrier-specific reference transmission power.
  • Figure 9 shows the change in uplink throughput per unit transmission power for each carrier.
  • Figure 10 shows the change in uplink throughput per unit of transmission power according to the allocated transmission power.
  • Figure 11 is a flowchart showing the operation of a base station for determining transmission power for each of a plurality of carriers.
  • Figure 12 illustrates a flowchart of the operation of a base station for determining the transmission power for each of all carriers.
  • Figure 13 illustrates a flowchart regarding the operation of a base station for generating a TPC command.
  • Figure 14 illustrates a flowchart regarding the operation of a base station for allocating frequency resources to multiple terminals.
  • Figure 15 illustrates a flowchart of operations of a base station for determining power for multiple component carriers for uplink signal transmission of a terminal.
  • signals e.g., signal, information, message, signaling
  • resources e.g., symbol, slot, subframe, radio frame, subcarrier, resource element (RE), resource block (RB), bandwidth part (BWP), occasion
  • terms for operational states e.g., step, operation, procedure
  • terms referring to data e.g., packet, user stream, information, bit, symbol, codeword
  • terms referring to channels e.g., packet, user stream, information, bit, symbol, codeword
  • channels e.g., packet, user stream, information, bit, symbol, codeword
  • expressions such as “more than” or “less than” may be used to determine whether a specific condition is satisfied or fulfilled, but this is merely a description for expressing an example and does not exclude descriptions such as “more than” or “less than.”
  • a condition described as “more than” may be replaced with “more than”
  • a condition described as “less than” may be replaced with “less than”
  • a condition described as “more than and less than” may be replaced with “more than and less than.”
  • “A” to “B” mean at least one of elements from A (including A) to B (including B).
  • C and/or “D” mean at least one of "C” or “D,” that is, including ⁇ "C", “D", “C” and “D” ⁇ .
  • 3GPP 3rd Generation Partnership Project
  • xRAN extensible radio access network
  • O-RAN open-radio access network
  • Figure 1 illustrates a wireless communication system
  • FIG. 1 illustrates a base station (110) and a terminal (120) as some of the nodes utilizing a wireless channel in a wireless communication system.
  • FIG. 1 illustrates only one base station, the wireless communication system may further include other base stations identical or similar to the base station (110).
  • the terminal (120) is a device used by a user and communicates with the base station (110) via a wireless channel.
  • the link from the base station (110) to the terminal (120) is referred to as a downlink (DL), and the link from the terminal (120) to the base station (110) is referred to as an uplink (UL).
  • the terminal (120) and another terminal may communicate with each other via a wireless channel.
  • the link between the terminal (120) and another terminal (device-to-device link, D2D) is referred to as a sidelink, and the sidelink may be used interchangeably with the PC5 interface.
  • the terminal (120) may be operated without the involvement of a user.
  • the terminal (120) is a device that performs machine type communication (MTC) and may not be carried by the user. Additionally, according to one embodiment, the terminal (120) may be an NB (narrowband)-IoT (internet of things) device.
  • MTC machine type communication
  • the terminal (120) may be an NB (narrowband)-IoT (internet of things) device.
  • the terminal (120) may be referred to as a terminal, or other terms such as 'user equipment (UE),' 'customer premises equipment (CPE),' 'mobile station,' 'subscriber station,' 'remote terminal,' 'wireless terminal,' 'electronic device,' or 'user device,' or other terms having equivalent technical meanings.
  • UE 'user equipment
  • CPE customer premises equipment
  • the base station (110) and the terminal (120) can perform beamforming.
  • the base station (110) and the terminal (120) can transmit and receive wireless signals in a relatively low frequency band (e.g., FR 1 (frequency range 1) of NR).
  • the base station (110) and the terminal (120) can transmit and receive wireless signals in a relatively high frequency band (e.g., FR 2 (or, FR 2-1, FR 2-2, FR 2-3), FR 3 of NR), millimeter wave (mmWave) band (e.g., 28 GHz, 30 GHz, 38 GHz, 60 GHz)).
  • the base station (110) and the terminal (120) can perform beamforming.
  • the beamforming can include transmission beamforming and reception beamforming.
  • the base station (110) and the terminal (120) can impart directionality to the transmitted or received signal. To this end, the base station (110) and the terminal (120) can select serving beams through a beam search or beam management procedure. After the serving beams are selected, subsequent communication can be performed through resources that have a QCL relationship with the resource that transmitted the serving beams.
  • the first antenna port and the second antenna port can be evaluated to have a QCL relationship.
  • the large-scale characteristics may include at least one of delay spread, Doppler spread, Doppler shift, average gain, average delay, and a spatial receiver parameter.
  • the embodiments of the present disclosure are not necessarily limited thereto.
  • the terminal may or may not perform beamforming.
  • the base station may or may not perform beamforming. That is, either only one of the base station and the terminal may perform beamforming, or neither the base station nor the terminal may perform beamforming.
  • a beam refers to a spatial flow of a signal in a wireless channel, and is formed by one or more antennas (or antenna elements), and this forming process may be referred to as beamforming.
  • Beamforming may include at least one of analog beamforming and digital beamforming (e.g., precoding).
  • Reference signals transmitted based on beamforming may include, for example, a demodulation-reference signal (DM-RS), a channel state information-reference signal (CSI-RS), a synchronization signal/physical broadcast channel (SS/PBCH), and a sounding reference signal (SRS).
  • DM-RS demodulation-reference signal
  • CSI-RS channel state information-reference signal
  • SS/PBCH synchronization signal/physical broadcast channel
  • SRS sounding reference signal
  • an IE such as a CSI-RS resource or an SRS-resource may be used, and this configuration may include information associated with the beam.
  • Information associated with a beam may mean whether the configuration (e.g., a CSI-RS resource) uses the same spatial domain filter as another configuration (e.g., another CSI-RS resource within the same CSI-RS resource set) or a different spatial domain filter, or whether it is quasi-co-located (QCL) with a reference signal, and if so, what type it is (e.g., QCL type A, B, C, D).
  • each base station was installed to include the functions of a digital processing unit (or DU (digital unit/distributed unit)) and an RF (radio frequency) processing unit (RF processing unit, or RU (radio unit)).
  • a digital processing unit or DU (digital unit/distributed unit)
  • RF processing unit radio frequency processing unit
  • RU radio unit
  • Figure 2a illustrates an interface between an upper network node and a lower network node.
  • the interface between the upper network node and the lower network node may include a fronthaul interface.
  • Fronthaul refers to entities between a wireless LAN and a base station, unlike backhaul between a base station and a core network.
  • Figure 2a illustrates an example of a fronthaul structure between an upper network node (210) and one lower network node (220), this is merely for convenience of explanation and the present disclosure is not limited thereto. In other words, embodiments of the present disclosure can also be applied to a fronthaul structure between one upper network node and multiple lower network nodes.
  • embodiments of the present disclosure can be applied to a fronthaul structure between one upper network node and two lower network nodes. Furthermore, embodiments of the present disclosure can also be applied to a fronthaul structure between one upper network node and three lower network nodes.
  • an upper network node may include a digital unit/distributed unit (DU).
  • the upper network node may be referred to as a DU.
  • a lower network node may include a radio unit (RU) or a massive MIMO unit (MMU).
  • the lower network node may be referred to as a RU or an MMU.
  • a base station (110) may include an upper network node (210) and a lower network node (220).
  • a fronthaul (215) between the upper network node (210) and the lower network node (220) may be operated via an Fx interface.
  • an interface such as an enhanced common public radio interface (eCPRI) or radio over ethernet (ROE) may be used, for example.
  • eCPRI enhanced common public radio interface
  • ROE radio over ethernet
  • an upper network node (210) performs functions for packet data convergence protocol (PDCP), radio link control (RLC), media access control (MAC), and physical (PHY), and a lower network node (220) may be implemented to perform functions for the PHY layer in addition to the RF (radio frequency) function.
  • PDCP packet data convergence protocol
  • RLC radio link control
  • MAC media access control
  • PHY physical
  • a lower network node (220) may be implemented to perform functions for the PHY layer in addition to the RF (radio frequency) function.
  • the upper network node (210) may be responsible for upper layer functions of a wireless network.
  • the upper network node (210) may perform functions of the MAC layer and a part of the PHY layer.
  • a part of the PHY layer refers to functions performed at a higher level among the functions of the PHY layer, and may include, for example, channel encoding (or channel decoding), scrambling (or descrambling), modulation (or demodulation), and layer mapping (or layer demapping).
  • O-RAN DU O-RAN DU
  • the upper network node (210) may be replaced with a first network entity or DU for a base station (e.g., gNB) in embodiments of the present disclosure, as needed.
  • the lower network node (220) may be responsible for lower layer functions of the wireless network.
  • the lower network node (220) may perform a part of the PHY layer, an RF function.
  • a part of the PHY layer refers to functions of the PHY layer that are performed at a relatively lower level than the upper network node (210), and may include, for example, iFFT transformation (or FFT transformation), CP (cyclic prefix) insertion (CP removal), and digital beamforming.
  • iFFT transformation or FFT transformation
  • CP cyclic prefix
  • CP removal cyclic prefix
  • digital beamforming An example of such specific functional separation is described in detail in FIG. 4.
  • the lower network node (220) may be referred to as an 'access unit (AU)', an 'access point (AP)', a 'transmission/reception point (TRP)', a 'remote radio head (RRH)', a 'radio unit (RU)', or other terms having an equivalent technical meaning thereto.
  • a lower network node (220) if a lower network node (220) complies with the O-RAN standard, it may be referred to as an O-RU (O-RAN RU) (or RU).
  • the lower network node (220) may be replaced with a second network entity or RU for a base station (e.g., gNB) in embodiments of the present disclosure, as needed.
  • a base station may be implemented in a distributed deployment according to a centralized unit (CU) configured to perform functions of upper layers of an access network (e.g., packet data convergence protocol (PDCP), radio resource control (RRC)) and a distributed unit (DU) configured to perform functions of lower layers.
  • a centralized unit configured to perform functions of upper layers of an access network (e.g., packet data convergence protocol (PDCP), radio resource control (RRC)) and a distributed unit (DU) configured to perform functions of lower layers.
  • the distributed unit (DU) may include a digital unit (DU) and a radio unit (RU).
  • the base station may be implemented in a structure in which CU, DU, and RU are arranged in that order.
  • the interface between the CU and the distributed unit (DU) may be referred to as an F1 interface.
  • a centralized unit may be connected to one or more DUs and may be responsible for functions at a higher layer than the DU.
  • the CU may be responsible for functions at the RRC (radio resource control) and PDCP (packet data convergence protocol) layers, while the DU and RU may be responsible for functions at lower layers.
  • the DU may perform some functions (high PHY) of the RLC (radio link control), MAC (media access control), and PHY (physical) layers, and the RU may be responsible for the remaining functions (low PHY) of the PHY layer.
  • a digital unit may be included in a distributed unit (DU) depending on the implementation of a distributed deployment of a base station.
  • DU and RU are described, but various embodiments of the present disclosure can be applied to both a base station deployment including a CU and a deployment in which the DU is directly connected to the core network (i.e., a base station in which the CU and DU are integrated into a single entity (e.g., an NG-RAN node)).
  • the core network i.e., a base station in which the CU and DU are integrated into a single entity (e.g., an NG-RAN node)).
  • Figure 2b illustrates the fronthaul interface of an open RAN (radio access network).
  • a base station (110) according to a distributed deployment is exemplified as an eNB or gNB.
  • the base station (110) may include an O-DU (251) and O-RUs (253-1, ..., 253-n).
  • O-DU 251
  • O-RUs (253-1, ..., 253-n) the operation and function of the O-RU (253-1) may be understood as a description of each of the other O-RUs (e.g., O-RU (253-n)).
  • the O-DU (251) is a logical node that includes functions, excluding functions exclusively assigned to the O-RU (253-1), among the functions of a base station (e.g., eNB, gNB) according to FIG. 4 described below.
  • the O-DU (251) can control the operation of the O-RUs (253-1, ..., 253-n).
  • the O-DU (251) may be referred to as an LLS (lower layer split) CU (central unit).
  • the O-RU (253-1) is a logical node that includes a subset of the functions of a base station (e.g., eNB, gNB) according to FIG. 4 described below. Real-time aspects of control plane (C-plane) communication and user plane (U-plane) communication with the O-RU (253-1) can be controlled by the O-DU (251).
  • the O-DU (251) can communicate with the O-RU (253-1) through an LLS interface.
  • the LLS interface corresponds to a fronthaul interface.
  • the LLS interface refers to a logical interface between the O-DU (251) and the O-RU (253-1) that utilizes lower layer functional split (i.e., intra-PHY based functional split).
  • the LLS-C between the O-DU (251) and the O-RU (253-1) provides the C-plane through the LLS interface.
  • the LLS-U between the O-DU (251) and the O-RU (253-1) provides the U-plane through the LLS interface.
  • Fig. 3a illustrates the functional configuration of an upper network node.
  • the configuration illustrated in Fig. 3a can be understood as the configuration of the upper network node (210) of Fig. 2a (or O-DU (250) of Fig. 2b) as part of a base station.
  • Terms such as “...unit” and “...unit” used hereinafter mean a unit that processes at least one function or operation, which can be implemented by hardware, software, or a combination of hardware and software.
  • the upper network node (210) may include a transceiver (310), a memory (320), and a processor (330).
  • the upper network node (210) may include a digital unit/distributed unit (DU).
  • the upper network node may be referred to as a DU.
  • the transceiver (310) may perform functions for transmitting and receiving signals in a wired communication environment.
  • the transceiver (310) may include a wired interface for controlling direct connection between devices via a transmission medium (e.g., copper wire, optical fiber).
  • the transceiver (310) may transmit an electrical signal to another device via copper wire, or may perform conversion between an electrical signal and an optical signal.
  • the upper network node (210) may communicate with the lower network node (220) via the transceiver (310).
  • the upper network node (210) may be connected to a core network or a centralized node (e.g., CU) of a distributed arrangement via the transceiver (310).
  • the transceiver (310) may perform functions for transmitting and receiving signals in a wireless communication environment.
  • the transceiver (310) may perform a conversion function between a baseband signal and a bit stream according to the physical layer specifications of the system.
  • the transceiver (310) when transmitting data, the transceiver (310) generates complex symbols by encoding and modulating the transmitted bit stream.
  • the transceiver (310) restores the received bit stream by demodulating and decoding the baseband signal.
  • the transceiver (310) may include multiple transmission and reception paths.
  • the transceiver (310) may be connected to the core network or other nodes (e.g., an integrated access backhaul (IAB).
  • IAB integrated access backhaul
  • the transceiver (310) can transmit and receive signals.
  • the transceiver (310) can transmit a management plane (M-plane) message.
  • the transceiver (310) can transmit a management plane (S-plane) message.
  • the transceiver (310) can transmit a control plane (C-plane) message.
  • the transceiver (310) can transmit a user plane (U-plane) message.
  • the transceiver (310) can receive a user plane message.
  • the upper network node (210) may include two or more transceivers.
  • the transceiver (310) transmits and receives signals as described above. Accordingly, all or part of the transceiver (310) may be referred to as a "communication unit,” a “transmitter,” a “receiver,” or a “transmitter-receiver unit.” Furthermore, in the following description, transmission and reception performed via a wireless channel are used to mean that the transceiver (310) performs the processing described above.
  • the transceiver (310) may further include a backhaul transceiver for connection to the core network or other base stations.
  • the backhaul transceiver provides an interface for communicating with other nodes within the network. That is, the backhaul transceiver converts a bit stream transmitted from the base station to other nodes, such as other access nodes, other base stations, upper nodes, the core network, etc., into a physical signal, and converts a physical signal received from other nodes into a bit stream.
  • the memory (320) stores data such as basic programs, application programs, and setting information for the operation of the upper network node (210).
  • the memory (320) may be referred to as a storage unit.
  • the memory (320) may be composed of volatile memory, non-volatile memory, or a combination of volatile memory and non-volatile memory.
  • the memory (320) provides stored data upon request from the processor (330).
  • the processor (330) controls the overall operations of the upper network node (210).
  • the processor (380) may be referred to as a control unit.
  • the processor (330) transmits and receives signals through the transceiver (310) (or through a backhaul communication unit).
  • the processor (330) records and reads data from the memory (320).
  • the processor (330) may perform the functions of the protocol stack required by the communication standard.
  • the upper network node (210) may include two or more processors according to other implementation examples.
  • the configuration of the upper network node (210) illustrated in FIG. 3A is merely an example, and examples of upper network nodes performing embodiments of the present disclosure are not limited to the configuration illustrated in FIG. 3A. In some embodiments, certain configurations may be added, deleted, or changed.
  • Fig. 3b illustrates the functional configuration of a lower network node.
  • the configuration illustrated in Fig. 3b can be understood as the configuration of the lower network node (220) of Fig. 2b (or O-RU (253-1) of Fig. 2b) as part of a base station.
  • Terms such as “... unit” and “... unit” used hereinafter mean a unit that processes at least one function or operation, and this can be implemented by hardware, software, or a combination of hardware and software.
  • the lower network node (220) may include an RF transceiver (360), a fronthaul transceiver (365), a memory (370), and a processor (380).
  • the RF transceiver (360) may be referred to as a wireless transceiver.
  • the fronthaul transceiver (365) may be referred to as an optical transceiver.
  • the RF transceiver (360) performs functions for transmitting and receiving signals via a wireless channel. For example, the RF transceiver (360) upconverts a baseband signal into an RF band signal and transmits it via an antenna, and downconverts an RF band signal received via the antenna into a baseband signal.
  • the RF transceiver (360) may include a transmit filter, a receive filter, an amplifier, a mixer, an oscillator, a DAC, an ADC, and the like.
  • the RF transceiver (360) may include multiple transmission and reception paths. Furthermore, the RF transceiver (360) may include an antenna unit. The RF transceiver (360) may include at least one antenna array composed of multiple antenna elements. In terms of hardware, the RF transceiver (360) may be composed of digital circuits and analog circuits (e.g., a radio frequency integrated circuit (RFIC)). Here, the digital circuits and analog circuits may be implemented in a single package. In addition, the RF transceiver (360) may include multiple RF chains. The RF transceiver (360) may perform beamforming.
  • RFIC radio frequency integrated circuit
  • the RF transceiver (360) may apply beamforming weights to a signal to be transmitted and received in order to impart directionality according to the settings of the processor (380).
  • the RF transceiver (360) may include a radio frequency (RF) block (or RF section).
  • RF radio frequency
  • the RF transceiver (360) can transmit and receive signals on a radio access network.
  • the RF transceiver (360) can transmit a downlink signal.
  • the downlink signal can include a synchronization signal (SS), a reference signal (RS) (e.g., a cell-specific reference signal (CRS), a demodulation (DM)-RS), system information (e.g., a MIB, a SIB, remaining system information (RMSI), other system information (OSI)), a configuration message, control information, or downlink data.
  • RS reference signal
  • DM demodulation
  • system information e.g., a MIB, a SIB, remaining system information (RMSI), other system information (OSI)
  • OSI system information
  • the RF transceiver (360) can receive an uplink signal.
  • the uplink signal may include a random access related signal (e.g., a random access preamble (RAP) (or Msg1 (message 1)), Msg3 (message 3)), a reference signal (e.g., a sounding reference signal (SRS), DM-RS), or a power headroom report (PHR).
  • RAP random access preamble
  • Msg1 messagessage 1
  • Msg3 messagessage 3
  • a reference signal e.g., a sounding reference signal (SRS), DM-RS
  • PHR power headroom report
  • the RF transceiver (360) is illustrated in FIG. 3b, in other implementation examples, the lower network node (220) may include two or more RF transceivers.
  • the RF transceiver (460) may transmit a RIM-RS.
  • the RF transceiver (460) may transmit a first type of RIM-RS (e.g., RIM-RS type 1 of 3GPP) to indicate the detection of far-field interference.
  • the RF transceiver (460) may transmit a second type of RIM-RS (e.g., RIM-RS type 2 of 3GPP) to indicate the presence or absence of far-field interference.
  • the fronthaul transceiver (365) can transmit and receive signals. According to one embodiment, the fronthaul transceiver (365) can transmit and receive signals on the fronthaul interface. For example, the fronthaul transceiver (365) can receive a management plane (M-plane) message. For example, the fronthaul transceiver (365) can receive a management plane (S-plane) message. For example, the fronthaul transceiver (365) can receive a control plane (C-plane) message. For example, the fronthaul transceiver (365) can transmit a user plane (U-plane) message. For example, the fronthaul transceiver (365) can receive a user plane message. Although only the fronthaul transceiver (365) is shown in FIG. 3b, according to other implementation examples, the lower network node (220) may include two or more fronthaul transceivers.
  • M-plane management plane
  • S-plane management plane
  • C-plane control plane
  • the RF transceiver (360) and the fronthaul transceiver (365) transmit and receive signals as described above. Accordingly, all or part of the RF transceiver (360) and the fronthaul transceiver (365) may be referred to as a 'communication unit', a 'transmitter unit', a 'receiver unit', or a 'transmitter-receiver unit'.
  • transmission and reception performed through a wireless channel are used to mean that the processing as described above is performed by the RF transceiver (360). In the following description, transmission and reception performed through a wireless channel are used to mean that the processing as described above is performed by the RF transceiver (360).
  • the memory (370) stores data such as basic programs, application programs, and setting information for the operation of the lower network node (220).
  • the memory (370) may be referred to as a storage unit.
  • the memory (370) may be configured as volatile memory, non-volatile memory, or a combination of volatile memory and non-volatile memory.
  • the memory (370) provides the stored data according to a request from the processor (380).
  • the memory (370) may include a memory for conditions, commands, or setting values related to the SRS transmission method.
  • the processor (380) controls the overall operations of the lower network node (220).
  • the processor (380) may be referred to as a control unit.
  • the processor (380) transmits and receives signals through the RF transceiver (360) or the fronthaul transceiver (365).
  • the processor (380) records and reads data in the memory (370).
  • the processor (380) may perform functions of the protocol stack required by the communication standard.
  • the lower network node (220) may include two or more processors according to other implementation examples.
  • the processor (380) may be a set of instructions or codes stored in the memory (370), or may be a storage space that stores instructions/codes that are at least temporarily residing in the processor (380), or may be a part of the circuitry that constitutes the processor (380). Additionally, the processor (380) may include various modules for performing communication. The processor (380) may control the lower network node (220) to perform operations according to the embodiments described below.
  • the configuration of the lower network node (220) illustrated in FIG. 3b is merely an example, and examples of RUs performing embodiments of the present disclosure are not limited to the configuration illustrated in FIG. 3b. In some embodiments, some configurations may be added, deleted, or changed.
  • Figure 4 illustrates an example of functional splitting between a DU and an RU.
  • the DU may be an example of the upper network node (210) of Figures 2a and 3a.
  • the RU may be an example of the lower network node (220) of Figures 2a and 3b.
  • the frequency band used has increased further.
  • the number of RUs that need to be installed has also increased further.
  • the amount of data transmitted has increased by a large amount, up to ten times, so the transmission capacity of the wired network transmitted to the fronthaul has increased significantly. Due to the factors described above, the installation cost of the wired network in the 5G communication system may increase significantly. Therefore, in order to lower the transmission capacity of the wired network and reduce the installation cost of the wired network, 'function split' can be used to lower the transmission capacity of the fronthaul by transferring some of the functions of the modem of the DU to the RU.
  • the role of the RU which is traditionally solely responsible for RF functions, can be expanded to include some physical layer functions.
  • the RU performs higher-layer functions, its throughput increases, which can increase transmission bandwidth in the fronthaul while reducing latency requirements due to response processing.
  • virtualization gains decrease, and the RU's size, weight, and cost increase.
  • the base station can sequentially perform channel encoding/scrambling, modulation, layer mapping, antenna mapping, RE mapping, digital beamforming (e.g., precoding), iFFT transform/CP insertion, and RF transform.
  • the base station can sequentially perform RF transform, FFT transform/CP removal, digital beamforming (pre-combining), RE demapping, channel estimation, layer demapping, demodulation, and decoding/descrambling.
  • the separation of uplink and downlink functions can be defined in various types depending on the needs of vendors, discussions in standards, etc., according to the above-mentioned trade-offs.
  • the RU performs the RF function, and the DU performs the PHY function.
  • the first functional separation is one in which the PHY function is not substantially implemented in the RU, and may be referred to as Option 8, for example.
  • the RU performs iFFT conversion/CP insertion in the DL and FFT conversion/CP removal in the UL of the PHY function, and the DU performs the remaining PHY functions.
  • the second functional separation (410) may be referred to as Option 7-1.
  • the RU performs iFFT conversion/CP insertion in the DL and FFT conversion/CP removal and digital beamforming in the UL of the PHY function, and the DU performs the remaining PHY functions.
  • the third functional separation (420a) may be referred to as Option 7-2x Category A.
  • the RU performs up to digital beamforming in both the DL and UL, and the DU performs upper PHY functions after the digital beamforming.
  • the fourth functional separation (420b) may be referred to as Option 7-2x Category B.
  • the RU performs up to RE mapping (or RE demapping) in both the DL and UL, and the DU performs upper PHY functions after RE mapping (or RE demapping).
  • the fifth functional separation (425) may be referred to as Option 7-2.
  • the RU performs up to modulation (or demodulation) in both the DL and UL, and the DU performs upper PHY functions after modulation (or demodulation).
  • the sixth functional separation (430) may be referred to as Option 7-3.
  • the RU performs encoding/scrambling (or decoding/descrambling) in both the DL and UL, and the DU performs subsequent upper PHY functions up to modulation (or demodulation).
  • the seventh functional separation (440) may be referred to as Option 6.
  • a relatively high layer e.g., the fourth functional separation (420b)
  • functional separation at too high a layer e.g., the sixth functional separation (430)
  • appropriate functional separation may be required depending on the arrangement and implementation method of the DU and the RU.
  • the third functional separation (420a) or a lower functional separation e.g., the second functional separation (410)
  • the fourth functional separation (420b) or a higher functional separation e.g., the sixth functional separation (430)
  • the third functional separation (420a) (which may be referred to as category A (CAT-A)) or the fourth functional separation (420b) (which may be referred to as category B (CAT-B)) for performing beamforming processing in an RU unless otherwise specified.
  • the O-RAN standard distinguishes the types of O-RUs depending on whether the precoding function is located at the interface of the O-DU or the O-RU interface.
  • An O-RU that does not perform precoding i.e., has low complexity
  • An O-RU that performs precoding may be referred to as a CAT-B O-RU.
  • the term "upper-PHY” refers to physical layer processing handled in the DU of the fronthaul interface.
  • the upper-PHY may include FEC encoding/decoding, scrambling, and modulation/demodulation.
  • the term “lower-PHY” refers to physical layer processing handled in the RU of the fronthaul interface.
  • the lower-PHY may include FFT/iFFT, digital beamforming, PRACH (physical random access channel) extraction, and filtering.
  • FFT/iFFT digital beamforming
  • PRACH physical random access channel
  • Embodiments of the present disclosure exemplarily describe the standards of eCPRI and O-RAN as fronthaul interfaces when transmitting messages between a DU, which is an example of an upper network node (210) of FIG. 2A, and a RU, which is an example of a lower network node (220).
  • the Ethernet payload of the message may include an eCPRI header, an O-RAN header, and additional fields.
  • various embodiments of the present disclosure are described using the standard terms of eCPRI or O-RAN, but other expressions having equivalent meanings to each term may be used instead in the various embodiments of the present disclosure.
  • various embodiments of the present disclosure are described using the standard terms of eCPRI or O-RAN, but the present disclosure is not limited thereto.
  • the CPRI standard may be used as the fronthaul interface.
  • the fronthaul transport protocol can use Ethernet and eCPRI, which are easy to share with networks.
  • the Ethernet payload can include an eCPRI header and an O-RAN header.
  • the eCPRI header can be located at the beginning of the Ethernet payload.
  • the contents of the eCPRI header are as follows.
  • This parameter indicates the type of service carried by the message type.
  • the parameter indicates an IQ data message, a real-time control data message, or a transmission network delay measurement message.
  • ecpriPayload (2 bytes): This parameter indicates the byte size of the payload portion of the eCPRI message.
  • ecpriRtcid/ecpriPcid 2 bytes: This parameter is the eAxC (extended antenna-carrier) identifier (eAxC ID) and identifies a specific data flow associated with each C-plane (ecpriRtcid) or U-plane (ecpriPcid) message.
  • eAxC ID extended antenna-carrier identifier
  • This parameter provides unique message identification and ordering at both levels.
  • the first octet of this parameter is a sequence ID used to identify the order of messages within the eAxC message stream. The sequence ID is used to ensure that all messages are received and to reorder out-of-order messages.
  • the second octet of this parameter is a subsequence ID. The subsequence ID is used to ensure ordering and implement reordering when radio-transport-level (eCPRI or IEEE-1914.3) fragmentation occurs.
  • the eAxC identifier includes a band and sector identifier ('BandSector_ID'), a component carrier identifier ('CC_ID'), a spatial stream identifier ('RU_Port_ID'), and a distributed unit identifier ('DU_Port_ID').
  • the bit allocation of the eAxC ID can be distinguished as follows.
  • DU_port ID is used to distinguish processing units (e.g., different baseband cards) in the O-DU.
  • the O-DU is expected to allocate bits for the DU_port ID, and the O-RU is expected to append the same value to the UL U-plane message carrying the same sectionId data.
  • BandSector_ID Aggregated cell identifier (band and sector distinction supported by O-RU).
  • CC_ID identifies the carrier component supported by the O-RU.
  • RU_port ID specifies logical flows such as data layer or spatial streams, and signaling channels that require separate numerologies (e.g. PRACH) or special antenna allocation such as SRS.
  • numerologies e.g. PRACH
  • SRS special antenna allocation
  • the application protocol of the fronthaul may include a control plane (C-plane), a user plane (U-plane), a synchronization plane (S-plane), and a management plane (M-plane).
  • C-plane control plane
  • U-plane user plane
  • S-plane synchronization plane
  • M-plane management plane
  • the control plane may be configured to provide scheduling information and beamforming information via control messages.
  • the control plane refers to real-time control between DUs and RUs.
  • the user plane may include IQ sample data transmitted between DUs and RUs.
  • the user plane may include user downlink data (IQ data or SSB/RS), uplink data (IQ data or SRS/RS), or PRACH data.
  • a weight vector of the beamforming information described above may be multiplied by the user's data.
  • the synchronization plane generally refers to traffic between DUs and RUs for a synchronization controller (e.g., IEEE grand master).
  • the synchronization plane may be related to timing and synchronization.
  • the management plane refers to non-real-time control between DUs and RUs.
  • the management plane may be related to initial setup, non-realtime reset or reset, and non-realtime report.
  • Control plane messages can be encapsulated based on a two-layer header approach.
  • the first layer can consist of the eCPRI common header or the IEEE 1914.3 common header, which contains fields used to indicate the message type.
  • the second layer is the application layer, which contains fields necessary for control and synchronization.
  • sections define the characteristics of U-plane data transmitted or received on a beam with a single pattern ID. The following section types are supported within the C-plane:
  • Section Type can indicate the purpose of control messages transmitted on the control plane.
  • the purposes of each Section Type are as follows.
  • sectionType 0: Used to indicate resource blocks or symbols not used in DL or UL.
  • sectionType 1: Used for most DL/UL wireless channels.
  • “most” refers to channels that do not require time or frequency offsets, such as those required for mixed numerology channels.
  • sectionType 3: PRACH and mixed-numerology channels. Channels that require a time or frequency offset or differ from the nominal SCS value(s).
  • sectionType 7: Used for LAA support
  • Figure 5 illustrates an example of a time-frequency domain resource structure supported by a wireless communication system.
  • Figure 5 illustrates the basic structure of the time-frequency domain, which is a radio resource region in which data or control channels are transmitted in the downlink or uplink in a 5G NR system to which the present embodiment can be applied.
  • one radio frame (514) can be defined as having a length of 10 ms, which is composed of 10 subframes having the same length of 1 ms.
  • one radio frame (514) can be divided into half-frames of 5 ms, and each half-frame includes 5 subframes.
  • the slot (506) is composed of 14 OFDM symbols, but the length of the slot may vary depending on the subcarrier spacing.
  • the slot is composed of a length of 1 ms, which is the same length as the subframe.
  • a slot consists of 14 OFDM symbols, but two slots can be included in one subframe with a length of 0.5 ms.
  • the radio resources supported in the wireless communication system to which the invention proposed in this specification can be applied are composed of a plurality of time resources, which are symbols, and a plurality of frequency resources, which are subcarriers, and each time resource and frequency resource can be expressed as a two-dimensional resource grid.
  • a square which is the smallest physical resource composed of one subcarrier and one symbol within the resource grid, is called a Resource Element (RE) (512).
  • the minimum transmission unit in the frequency domain is a subcarrier
  • the carrier bandwidth constituting the resource grid is composed of N BW subcarriers (504).
  • the downlink transmission bandwidth and uplink transmission bandwidth may be different.
  • the channel bandwidth represents the radio frequency (RF) bandwidth corresponding to the system transmission bandwidth.
  • RF radio frequency
  • [Table 1] shows part of the correspondence between the system transmission bandwidth, subcarrier spacing (SCS), and channel bandwidth defined in the NR system in a frequency band (e.g., frequency range (FR) 1 (510 MHz to 7125 MHz)) lower than the upper limit defined in the standard (e.g., 7.125) GHz.
  • FR frequency range
  • [Table 2] shows some of the correspondences between transmission bandwidth, subcarrier spacing, and channel bandwidth defined in NR system in frequency bands higher than the lower limit defined in the specification (e.g., 24.25 GHz) (e.g., FR2 (24250 MHz - 52600 MHz) or FR2-2 (52600 MHz ⁇ 71000 MHz)).
  • FR2 24250 MHz - 52600 MHz
  • FR2-2 52600 MHz ⁇ 71000 MHz
  • N/A may be a bandwidth-subcarrier combination not supported by the NR system.
  • Figure 6 illustrates examples of channels in a communication standard.
  • FIG. 6 illustrates examples of channels in a communication standard.
  • the channels may include a physical channel (610), a transport channel (620), and a logical channel (630), depending on the layers defined in the communication standard.
  • a physical channel (610) may provide functions (e.g., channel coding, HARQ processing, modulation, multi-antenna processing, resource mapping) necessary for generating physical signals at the physical layer.
  • functions e.g., channel coding, HARQ processing, modulation, multi-antenna processing, resource mapping
  • physical signals are modulated using OFDM and may be transmitted in a wireless environment via time-frequency resources (e.g., resources of the resource grid of FIG. 3).
  • a physical channel may include at least one of a physical broadcast channel (PBCH), a physical downlink shared channel (PDSCH), or a physical downlink control channel (PDCCH).
  • the PDCCH may be used to carry downlink control information (DCI).
  • DCI downlink control information
  • downlink data refers to symbols transmitted through the PDSCH
  • a downlink control signal may include symbols transmitted through the PDCCH.
  • a synchronization signal e.g., a primary synchronization signal (PSS), a secondary synchronization signal (SSS)
  • an SS/PBCH block including a broadcast signal e.g., a PBCH
  • CSI-RS channel state information-reference signal
  • DMRS demodulation reference signal
  • PTRS phase tracking reference signal
  • the physical channel (610) may include at least one of a physical uplink shared channel (PUSCH), a physical uplink control channel (PUCCH), or a physical random access channel (PRACH).
  • the PUSCH or PUCCH may be used to carry uplink control information (UCI).
  • uplink data refers to symbols transmitted through the PUSCH, and the uplink control signal may include symbols corresponding to the UCI.
  • the UCI may include at least one of a scheduling request (SR), a hybrid automatic request (HARQ)-acknowledge (ACK) bit(s), or channel state information (CSI).
  • SR scheduling request
  • HARQ hybrid automatic request
  • ACK acknowledgenowledge
  • CSI channel state information
  • CSI channel state information
  • the transmission channel (620) connects the physical layer and the medium access channel (MAC) layer located at an upper level of the physical layer, and can be classified according to how data is transmitted through the wireless interface.
  • the transmission channel (620) may include at least one of a paging channel (PCH) for paging, a broadcast channel (BCH) for broadcasting system information, or a downlink shared channel (DL-SCH) for transmitting downlink data.
  • the transmission channel (620) may include at least one of a random access channel (RACH) for transmitting a random access preamble or an uplink shared channel (UL-SCH) for transmitting downlink data.
  • RACH random access channel
  • UL-SCH uplink shared channel
  • the logical channel (630) is located above the transport channel and is mapped to the transport channel (620).
  • the logical channel (630) can be divided into a control channel for transmitting control region information and a traffic channel for transmitting user region information.
  • the control channel of the logical channel (630) can include at least one of a paging control channel (PCCH), a broadcast control channel (BCCH), a common control channel (CCCH), or a dedicated control channel (DCCH).
  • the traffic channel of the logical channel (630) can include a dedicated traffic channel (DTCH).
  • a random access signal may include sequences transmitted via a physical random access channel (PRACH).
  • 'Data' may include signals other than a reference signal.
  • 'data' obtained by a receiver in uplink communication may include signals transmitted via a physical random access channel (PUSCH).
  • PUSCH physical random access channel
  • the PUSCH is exemplary, and it is understood that embodiments of the present disclosure may also be applied to other channels requiring channel estimation (e.g., PDSCH, PBCH, PDCCH, PUCCH).
  • a base station (e.g., base station 110 of FIG. 1) can transmit and receive signals via multiple carriers (or multiple carriers).
  • the base station can receive an uplink signal from a terminal (e.g., terminal 110 of FIG. 1) via at least one or all of the multiple carriers.
  • the terminal can transmit an uplink signal to the base station using multiple carriers.
  • the transmission power (or power) of the terminal can be allocated separately for each carrier.
  • the terminal can transmit an uplink signal to the base station using a first carrier (or a first component carrier) and a second carrier (or a second component carrier).
  • the terminal can allocate a first transmission power to the first carrier.
  • the terminal can allocate a second transmission power to the second carrier.
  • the sum of the first transmission power and the second transmission power can be set to be less than or equal to the maximum transmission power of the terminal.
  • the base station can determine a first transmission power and a second transmission power, and transmit information about the first transmission power and information about the second transmission power to the terminal.
  • the terminal can transmit an uplink signal to the base station using a first carrier and a second carrier based on the information about the first transmission power and the information about the second transmission power received from the base station.
  • the base station can perform transmission power distribution of the terminal for the uplink.
  • the following specification will describe an embodiment in which the base station (or network device) performs transmission power distribution of the terminal to increase uplink throughput.
  • Figure 7 illustrates an example of the operation of a base station for controlling the transmission power of a terminal.
  • the transmission power per carrier of a terminal during PUSCH (physical uplink shared channel) transmission can be expressed as in the following mathematical formula.
  • the base station (110) may determine a carrier-specific SINR target and frequency resource (e.g., PRB) allocation information for a terminal (120) that supports multiple carriers. At this time, the sum of the carrier-specific transmission powers of the terminal determined by the uplink scheduling of the base station (110) may not exceed the maximum transmission power of the terminal (120). If the sum of the carrier-specific transmission powers determined according to Equation 1 exceeds the maximum transmission power of the terminal, a carrier with a lower serving carrier index may have a priority in power distribution.
  • a carrier-specific SINR target and frequency resource e.g., PRB
  • a PUSCH may be transmitted through a lower transmission power compared to the transmission power per frequency resource set by the base station (110) in a carrier with a lower priority in power distribution.
  • the reception performance in the carrier with a lower priority may be lower than the performance according to the SINR target determined by the base station (110).
  • uplink power distribution may be performed independently for each carrier.
  • a power headroom report (PHR) transmitted by a terminal (120) via a MAC control element (CE) may not take into account power allocated from other carriers.
  • the maximum transmission power of the terminal (120) may be the sum of the transmission powers allocated to all carriers. Therefore, when frequency resources are allocated for each carrier at the base station (120), the transmission power expected to be allocated from other carriers must be taken into account.
  • the base station (120) may determine the frequency resources to be allocated to each carrier according to mathematical expression 1 so that equal power is allocated to each carrier.
  • the base station (110) may also allocate frequency resources starting from a carrier with a high
  • the base station (110) may not consider the transmission power allocated to other carriers when determining the transmission power allocated to a carrier. For example, the base station (110) may limit the maximum transmission power of the terminal (120) for each carrier by setting p-Max in FrequencyInfoUL. If the sum of the p-Max set for each carrier is set lower than the maximum transmission power of the terminal (120), the base station (110) may allocate frequency resources for each carrier without considering the transmission power allocated for each carrier. However, p-Max may be applied to all terminals supported by the corresponding carrier. Therefore, the maximum transmission power of a terminal supported by a single carrier may also be limited to p-Max. According to the above embodiment, when p-Max is set, the coverage of the carrier may be reduced.
  • the transmission power efficiency of other terminals for each carrier may not be considered.
  • the operation of the base station (110) for resource allocation and power distribution will be described to maximize the transmission power efficiency of the terminal (120) and increase the uplink throughput.
  • the base station (110) may generate a TPC command to increase the power spectral density (PSD) of a carrier with a good electric field when the maximum transmission power of the terminal (120) is limited.
  • the base station (110) may increase the power spectral density of the carrier with a good electric field by transmitting the generated TPC command to the terminal (120).
  • the base station (110) may set a priority of power distribution for the carrier with a good electric field when allocating frequency resources.
  • the base station (110) may control PSD and/or RB allocation per carrier to increase uplink throughput.
  • the base station (110) when the electric fields of each carrier are different in a multi-carrier environment, can set the transmission power of more terminals to a carrier with a better electric field.
  • the base station (110) can determine the ratio of power distributed to each carrier.
  • a base station (110) for performing power distribution and resource allocation per carrier in a wireless communication system supporting multiple carriers will be described.
  • a technique for determining carriers to which power will be distributed by the base station (110) will be described.
  • a technique for determining frequency resources allocated to carriers to which power will be distributed by the base station (110) will be described.
  • a technique for controlling power spectral density per carrier by the base station (110) will be described.
  • Figure 8 shows the power spectral efficiency per carrier-specific reference transmission power.
  • Figure 9 shows the change in uplink throughput per unit transmission power for each carrier.
  • graph (900) may correspond to graph (800) of FIG. 8.
  • region (911) may relate to transmission power allocated to a first carrier (810).
  • Region (912) may relate to transmission power allocated to a second carrier (820).
  • Region (913) may relate to transmission power allocated to a third carrier (830).
  • Region (914) may relate to transmission power allocated to a fourth carrier (840).
  • the sizes of regions (911, 912, 913, 914) may be proportional to the allocated power.
  • Figure 10 shows the change in uplink throughput per unit of transmission power according to the allocated transmission power.
  • Figure 11 is a flowchart showing the operation of a base station for determining transmission power for each of a plurality of carriers.
  • the base station (110) may initiate RB allocation and transmission power distribution for multiple carriers.
  • the base station (110) may initiate RB allocation and transmission power distribution for multiple carriers for transmitting uplink signals from the terminal (120).
  • Figure 12 illustrates a flowchart of the operation of a base station for determining the transmission power for each of all carriers.
  • Figure 13 illustrates a flowchart regarding the operation of a base station for generating a TPC command.
  • the base station (110) may determine frequency resources for each carrier (e.g., the number of RBs allocated for each carrier) based on buffer occupancy (BO), which indicates the size of the amount of information that the terminal (120) wishes to transmit. Based on buffer occupancy (BO), the base station (110) may preferentially allocate frequency resources to a carrier with high power spectral efficiency (PSD) when distributing transmission power.
  • BO buffer occupancy
  • PSD power spectral efficiency
  • Figure 14 illustrates a flowchart regarding the operation of a base station for allocating frequency resources to multiple terminals.
  • the base station (110) can allocate frequency resources to multiple terminals.
  • the base station (110) can determine the frequency resources allocated to each terminal so that the uplink throughput variation according to the frequency resources (or RBs) allocated to each terminal is the same.
  • Figure 15 illustrates a flowchart of operations of a base station for determining power for multiple component carriers for uplink signal transmission of a terminal.
  • the base station (110) may determine at least one resource block for the first component carrier. For example, the base station (110) may determine at least one resource block for the first component carrier based on a first throughput increase amount according to an increase in power per unit frequency in the remaining component carriers excluding the first component carrier among a plurality of component carriers and a second throughput increase amount according to an increase in frequency resources in the first component carrier.
  • the base station (110) may allocate all RBs constituting the remaining component carriers.
  • the SINR per RB of the remaining component carriers may increase.
  • the first throughput increase due to the increase in frequency resources may be maintained constant.
  • the second throughput increase due to the increase in power per unit frequency may decrease as the power per unit frequency increases.
  • the first throughput increase due to the increase in frequency resources may be represented as in the graph (1020) of FIG. 10.
  • the second throughput increase due to the increase in power per unit frequency may be represented as in the graphs (1010-1, 1010-2, ..., 1010-(n-1)) of FIG. 10.
  • the base station (110) can identify that the identified number of at least one resource block exceeds the number of the plurality of resource blocks constituting the first component carrier.
  • the base station (110) can determine (or identify) the number of at least one resource block as the number of the plurality of resource blocks based on identifying that the identified number of at least one resource block exceeds the number of the plurality of resource blocks constituting the first component carrier.
  • the base station (110) may identify first power information regarding the first component carrier. For example, the base station (110) may identify the first power information regarding the first component carrier based on at least one resource block.
  • the base station (110) may identify second power information for each of the remaining component carriers based on the first power information.
  • the base station (110) may identify the second power information and may also identify the first power information.
  • the base station (110) may allocate the second power information and determine the first power information based on the remaining power information.
  • the base station (110) may determine the number of the at least one resource block as the number of the plurality of resource blocks based on identifying that the identified number of at least one resource block exceeds the number of the plurality of resource blocks constituting the first component carrier.
  • the base station (110) may identify second power information regarding each of the remaining component carriers based on the number of the at least one resource block set as the number of the plurality of resource blocks.
  • the base station (110) may identify power for each of the remaining component carriers as second power information based on identifying that the number of at least one resource block is less than or equal to the number of a plurality of resource blocks constituting the first component carrier.
  • the base station (110) may receive an uplink signal from the terminal (120) using at least one resource block for the first component carrier according to the first power information, and may receive at least one uplink signal from the terminal (120) using resource blocks for the remaining component carriers according to the second power information.
  • the base station (110) can receive an uplink signal from the terminal (120) using at least one resource block among a plurality of resource blocks constituting the first component carrier according to the first power information.
  • the base station (110) can receive at least one uplink signal from the terminal (120) using all resource blocks for the remaining component carriers according to the second power information.
  • the base station (110) may transmit first power information and second power information to the terminal (120) via DCI. Based on identifying the first power information and the second power information, the base station (110) may transmit information about at least one resource block for the first component carrier and information about resource blocks for the remaining component carriers to the terminal (120) via DCI.
  • a network device may include a transceiver, a memory storing one or more instructions and including a storage medium, and at least one processor including a processing circuit.
  • the one or more instructions when individually or collectively executed by the at least one processor, may cause the network device to identify a first component carrier having a lowest signal quality among the plurality of component carriers based on signal qualities for each of the plurality of component carriers, determine at least one resource block for the first component carrier based on a first throughput increase amount according to a power increase per unit frequency in the remaining component carriers excluding the first component carrier among the plurality of component carriers and a second throughput increase amount according to a frequency resource increase in the first component carrier, identify first power information for the first component carrier based on the at least one resource block, identify second power information for each of the remaining component carriers based on the first power information, receive an uplink signal from the terminal using the at least one resource block for the first component carrier according to the first power information, and receive at least
  • the first throughput increase due to an increase in frequency resources may be maintained constant.
  • the second throughput increase due to an increase in power per unit frequency may be reduced as the power per unit frequency increases.
  • the one or more instructions when individually or collectively executed by the at least one processor, may cause the network device to identify a power for each of the remaining component carriers that provides the first throughput increase, and determine the at least one resource block based on the power for each of the remaining component carriers.
  • the one or more instructions when individually or collectively executed by the at least one processor, may cause the network device to identify power for each of the remaining component carriers as the second power information based on identifying that the number of the at least one resource block is less than or equal to the number of the plurality of resource blocks constituting the first component carrier.
  • the one or more instructions when individually or collectively executed by the at least one processor, may cause the network device to identify that the number of the at least one resource block exceeds the number of the plurality of resource blocks constituting the first component carrier, and to set the number of the at least one resource block to the number of the plurality of resource blocks based on identifying that the number of the at least one resource block exceeds the number of the plurality of resource blocks.
  • the one or more instructions when individually or collectively executed by the at least one processor, may cause the network device to identify the second power information for each of the remaining component carriers based on the number of the at least one resource block set to the number of the plurality of resource blocks.
  • information about at least one resource block for the first component carrier and information about the resource blocks for the remaining component carriers can be transmitted to the terminal via downlink control information (DCI).
  • DCI downlink control information
  • the one or more instructions when individually or collectively executed by the at least one processor, may cause the network device to generate a transmit power control (TPC) command based on a power headroom report (PHR) received from the terminal, and to transmit the transmit power control command to the terminal to change at least one of the first power information and the second power information.
  • TPC transmit power control
  • PHR power headroom report
  • a method performed by a network device may include: identifying a first component carrier having the lowest signal quality among a plurality of component carriers based on signal qualities for each of the plurality of component carriers; determining at least one resource block for the first component carrier based on a first throughput increase amount according to a power increase per unit frequency in component carriers remaining from among the plurality of component carriers excluding the first component carrier and a second throughput increase amount according to a frequency resource increase in the first component carrier; identifying first power information for the first component carrier based on the at least one resource block; identifying second power information for each of the remaining component carriers based on the first power information; and receiving an uplink signal from the terminal using the at least one resource block for the first component carrier according to the first power information, and receiving at least one uplink signal from the terminal using resource blocks for the remaining component carriers according to the second power information.
  • the first throughput increase due to an increase in frequency resources may be maintained constant.
  • the second throughput increase due to an increase in power per unit frequency may be reduced as the power per unit frequency increases.
  • the method may include identifying power for each of the remaining component carriers that provides the first throughput increase, and determining the at least one resource block based on the power for each of the remaining component carriers.
  • the method may include an operation of identifying power for each of the remaining component carriers as the second power information based on identifying that the number of the at least one resource block is less than or equal to the number of the plurality of resource blocks constituting the first component carrier.
  • the method may include an operation of identifying that the number of the at least one resource block exceeds the number of the plurality of resource blocks constituting the first component carrier, and an operation of setting the number of the at least one resource block to the number of the plurality of resource blocks based on identifying that the number of the at least one resource block exceeds the number of the plurality of resource blocks.
  • the method may include an operation of identifying the second power information for each of the remaining component carriers based on the number of the at least one resource block set to the number of the plurality of resource blocks.
  • information about at least one resource block for the first component carrier and information about the resource blocks for the remaining component carriers may be transmitted to the terminal via downlink control information (DCI).
  • DCI downlink control information
  • the method may include an operation of generating a transmit power control (TPC) command based on a power headroom report (PHR) received from the terminal, and an operation of transmitting the transmit power control command to the terminal to change at least one of the first power information and the second power information.
  • TPC transmit power control
  • PHR power headroom report
  • a non-transitory computer-readable storage medium can store one or more programs.
  • the one or more programs may include instructions that, when executed by at least one processor of a network device, cause the network device to identify a first component carrier having the lowest signal quality among the plurality of component carriers based on signal qualities for each of the plurality of component carriers, determine at least one resource block for the first component carrier based on a first throughput increase amount according to an increase in power per unit frequency in the remaining component carriers excluding the first component carrier among the plurality of component carriers and a second throughput increase amount according to an increase in frequency resources in the first component carrier, identify first power information for the first component carrier based on the at least one resource block, identify second power information for each of the remaining component carriers based on the first power information, receive an uplink signal from the terminal using the at least one resource block for the first component carrier according to the first power information, and cause the network device to receive at least one uplink signal from the terminal using resource blocks for the remaining component carriers according to the second power information.
  • the first throughput increase due to an increase in frequency resources may be maintained constant.
  • the second throughput increase due to an increase in power per unit frequency may be reduced as the power per unit frequency increases.
  • the one or more programs may include instructions that, when executed by the at least one processor, cause the network device to identify a power for each of the remaining component carriers that provides the first throughput increase, and determine the at least one resource block based on the power for each of the remaining component carriers.
  • the one or more programs may include instructions that, when executed by the at least one processor, cause the network device to identify power for each of the remaining component carriers as the second power information based on identifying that the number of the at least one resource block is less than or equal to the number of the plurality of resource blocks constituting the first component carrier.
  • a power control and resource allocation function capable of increasing frequency resources and power efficiency of the terminal can be proposed. Accordingly, the sum cell capacity and uplink throughput of the multiple carriers can be increased.
  • a computer-readable storage medium storing one or more programs (software modules) may be provided.
  • the one or more programs stored in the computer-readable storage medium are configured to be executed by one or more processors within an electronic device.
  • the one or more programs include instructions that cause the electronic device to execute methods according to embodiments described in the claims or specification of the present disclosure.
  • the one or more programs may be provided as a computer program product.
  • the computer program product may be traded between a seller and a buyer as a commodity.
  • the computer program product may be distributed in the form of a machine-readable storage medium (e.g., compact disc read only memory (CD-ROM)), or may be distributed online (e.g., downloaded or uploaded) through an application store (e.g., Play Store) or directly between two user devices (e.g., smart phones).
  • a machine-readable storage medium e.g., compact disc read only memory (CD-ROM)
  • an application store e.g., Play Store
  • two user devices e.g., smart phones.
  • at least a portion of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or an intermediary server.
  • programs may be stored in random access memory, non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disc storage devices, compact disc-ROM (CD-ROM), digital versatile discs (DVDs) or other forms of optical storage devices, magnetic cassettes, or may be stored in memories formed by a combination of some or all of these.
  • non-volatile memory including flash memory, read only memory (ROM), electrically erasable programmable read only memory (EEPROM), magnetic disc storage devices, compact disc-ROM (CD-ROM), digital versatile discs (DVDs) or other forms of optical storage devices, magnetic cassettes, or may be stored in memories formed by a combination of some or all of these.
  • each configuration memory may include multiple copies.
  • the program may be stored on an attachable storage device that is accessible via a communication network, such as the Internet, an intranet, a local area network (LAN), a wide area network (WAN), a storage area network (SAN), or a combination thereof.
  • a storage device may be connected to a device performing an embodiment of the present disclosure via an external port.
  • a separate storage device on the communication network may be connected to a device performing an embodiment of the present disclosure.
  • one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added.
  • a plurality of components e.g., 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 the corresponding component among the plurality of components prior to the integration.
  • the operations performed by a module, program, or other component may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Selon un mode de réalisation, un procédé mis en œuvre par un appareil de réseau peut comprendre les opérations consistant à : identifier une première porteuse composante ayant la qualité de signal la plus faible, parmi une pluralité de porteuses composantes ; déterminer au moins un bloc de ressources concernant la première porteuse composante; identifier des premières informations de puissance concernant la première porteuse composante; sur la base des premières informations de puissance, identifier des secondes informations de puissance concernant chacune des porteuses composantes restantes ; et en fonction des premières informations de puissance, recevoir un signal de liaison montante provenant du terminal à l'aide du ou des blocs de ressources concernant la première porteuse composante, et selon les secondes informations de puissance, recevoir au moins un signal de liaison montante provenant du terminal en utilisant des blocs de ressources concernant les porteuses composantes restantes.
PCT/KR2025/004401 2024-04-29 2025-04-02 Appareil de réseau et procédé de détermination de puissance de transmission d'un terminal Pending WO2025230154A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR10-2024-0057199 2024-04-29
KR20240057199 2024-04-29
KR20240087191 2024-07-02
KR10-2024-0087191 2024-07-02
KR1020240123562A KR20250157919A (ko) 2024-04-29 2024-09-10 단말의 송신 전력을 결정하기 위한 네트워크 장치 및 방법
KR10-2024-0123562 2024-09-10

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WO2025230154A1 true WO2025230154A1 (fr) 2025-11-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090039786A (ko) * 2006-07-28 2009-04-22 교세라 가부시키가이샤 무선 통신 방법 및 무선 기지국
US20130142113A1 (en) * 2011-11-04 2013-06-06 Mo-Han Fong Path-loss estimation for uplink power control in a carrier agregation environment
KR20200028942A (ko) * 2017-06-16 2020-03-17 지티이 코포레이션 전력 공유 방법 및 장치
US20230046153A1 (en) * 2020-04-30 2023-02-16 Beijing Xiaomi Mobile Software Co., Ltd. Power control method, user equipment, base station and computer readable storage medium
US20230164757A1 (en) * 2020-07-30 2023-05-25 Huawei Technologies Co., Ltd. Communication method and apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090039786A (ko) * 2006-07-28 2009-04-22 교세라 가부시키가이샤 무선 통신 방법 및 무선 기지국
US20130142113A1 (en) * 2011-11-04 2013-06-06 Mo-Han Fong Path-loss estimation for uplink power control in a carrier agregation environment
KR20200028942A (ko) * 2017-06-16 2020-03-17 지티이 코포레이션 전력 공유 방법 및 장치
US20230046153A1 (en) * 2020-04-30 2023-02-16 Beijing Xiaomi Mobile Software Co., Ltd. Power control method, user equipment, base station and computer readable storage medium
US20230164757A1 (en) * 2020-07-30 2023-05-25 Huawei Technologies Co., Ltd. Communication method and apparatus

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