WO2013081257A1 - Appareil de traitement de signaux numériques, système de traitement de signaux numériques et procédé de traitement de signaux numériques - Google Patents

Appareil de traitement de signaux numériques, système de traitement de signaux numériques et procédé de traitement de signaux numériques Download PDF

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Publication number
WO2013081257A1
WO2013081257A1 PCT/KR2012/003222 KR2012003222W WO2013081257A1 WO 2013081257 A1 WO2013081257 A1 WO 2013081257A1 KR 2012003222 W KR2012003222 W KR 2012003222W WO 2013081257 A1 WO2013081257 A1 WO 2013081257A1
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Prior art keywords
cell
signal processing
signal
processing apparatus
terminal
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PCT/KR2012/003222
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English (en)
Korean (ko)
Inventor
이기호
이용규
지영하
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주식회사 케이티
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Priority claimed from KR1020110142726A external-priority patent/KR101311518B1/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Publication of WO2013081257A1 publication Critical patent/WO2013081257A1/fr

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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H04J11/0023—Interference mitigation or co-ordination
    • H04J11/005—Interference mitigation or co-ordination of intercell interference
    • H04J11/0056—Inter-base station aspects
    • 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
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/04—Traffic adaptive resource partitioning

Definitions

  • the present invention relates to a digital signal processing apparatus, a signal processing system and a signal processing method.
  • a communication base station includes a digital signal processor and a wireless signal processor together in one physical system.
  • a system has a limitation in optimizing a cell design because a base station including all processing units must be installed in a cell.
  • a plurality of antennas may be connected to one base station to form a cell in a required manner, thereby reducing a coverage hole.
  • the present invention provides a digital signal processing apparatus, a signal processing system, and a signal processing method in which the amount of interference of a reference signal is reduced by reducing the strength of a reference signal using the same resource in an adjacent cell, thereby improving wireless data transmission performance. To provide.
  • a digital signal processing device connected to the core system and processing a wireless digital signal; And physically separated from the digital signal processing apparatus, converts and amplifies the digital signal received from the digital signal processing apparatus, and transmits the amplified signal to the terminal based on a multi-antenna technique using two antennas. And a plurality of wireless signal processing apparatuses for receiving a signal transmitted from a terminal and transmitting the received signal to the digital signal processing apparatus based on a multi-antenna technique using two antennas, wherein the first cell and the second cell are adjacent to each other.
  • a radio signal processing apparatus located in a cell transmits a signal to a terminal located at a boundary area between the first cell and the second cell by using a first resource of the first cell and is located in the second cell.
  • the signal processing apparatus may determine an intensity of the reference signal included in the first resource of the second cell and compare the strength of the reference signal included in the first resource of the first cell. It is characterized by transmitting a signal weaker than the strength.
  • the apparatus for processing a radio signal of the second cell may include an intensity of a reference signal included in a resource excluding the first resource among resources of the second cell than an intensity of a reference signal included in the first resource of the second cell. It is characterized in that the signal is transmitted strong.
  • the first cell and the second cell is characterized by using the same reference signal.
  • the difference between the physical cell identifier of the first cell and the physical cell identifier of the second cell is a multiple of three.
  • the wireless signal processing apparatus of the first cell and the wireless signal processing apparatus of the second cell transmit an uplink signal strength value received from the terminal to the digital signal processing apparatus.
  • the location of the terminal within the boundary area is determined based on a signal strength value transmitted from the radio signal processing device of the first cell and the radio signal processing device of the second cell.
  • the digital signal processing apparatus may further include a difference between signal strength values transmitted from the wireless signal processing apparatus of the first cell and the wireless signal processing apparatus of the second cell, respectively, equal to or less than a difference threshold value, or from the signal strength value. If the ratio is between the non-threshold and the inverse of the non-threshold, it is determined that the terminal is located in the border region.
  • transmitting the signal by making the strength of the reference signal included in the resource excluding the first resource among the resources of the second cell stronger than the strength of the reference signal included in the first resource of the second cell is frequency selective scheduling. It is characterized in that performed by (Frequency Selectivity Scheduling).
  • a digital signal processing apparatus for processing a wireless signal from a terminal for transmitting and receiving a signal wherein the wireless signal processing apparatus located in a first cell and the wireless signal processing apparatus located in a second cell of the plurality of wireless signal processing apparatuses are provided.
  • Receiving unit for receiving the signal strength value of the uplink received from the terminal; A determination unit determining whether the terminal is located within a boundary area between the first cell and the second cell based on a signal strength value received through the reception unit; And when it is determined by the determination unit that the terminal is located in a boundary area between the first cell and the second cell, the radio signal processing apparatus of the first cell uses the first resource of the first cell. And transmits a signal to the terminal, and the wireless signal processing apparatus of the second cell uses the reference signal included in the first resource of the first cell as the strength of the reference signal included in the first resource of the second cell. It includes a processor for controlling to transmit a signal weaker than the strength of the signal.
  • the determining unit when the difference between the signal strength values received through the receiving unit is equal to or less than the difference threshold value or the ratio of the signal strength values between the non-threshold value and the inverse of the non-threshold value, the terminal It is determined to be located within the boundary area of the cell and the second cell.
  • the difference between the physical cell identifier of the first cell and the physical cell identifier of the second cell is a multiple of 3, so that the first cell and the second cell use the same reference signal.
  • the plurality of radio signal processing apparatuses may be configured according to an orthogonal frequency division multiplexing (OFDM) scheme or a resource according to a wideband code division multiple access (WCDMA) scheme.
  • OFDM orthogonal frequency division multiplexing
  • WCDMA wideband code division multiple access
  • a plurality of wireless signal processing devices for processing a wireless signal by installing a digital signal processing device for processing a wireless digital signal, wherein the plurality of wireless signal processing device is based on a multi-antenna technology using two antennas A method of processing a signal from transmitting and receiving a signal, comprising: a signal strength value received from a wireless signal processing device located in a first cell and a wireless signal processing device located in a second cell among the plurality of wireless signal processing devices; Determining whether the terminal is located within a boundary area between the first cell and the second cell; And when it is determined that the terminal is located at a boundary area between the first cell and the second cell, the wireless signal processing apparatus of the first cell sends a signal to the terminal using the first resource of the first cell.
  • the wireless signal processing apparatus of the second cell is controlled to transmit the strength of the reference signal included in the first resource of the second cell to be weaker than that of the reference signal included in the first resource of the first cell. Controlling to transmit the signal.
  • the determining may include: from the radio signal processing device located in the first cell and the radio signal processing device located in the second cell, to the radio signal processing device located in the first cell and the second cell.
  • the amount of interference of the reference signal is reduced by reducing the strength of the reference signal using the same resource in the adjacent cell.
  • FIG. 1 is a schematic diagram of a network according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural diagram of a cell according to an embodiment of the present invention.
  • FIG. 3 is a diagram illustrating an example of a signal transmitted by a wireless signal processing apparatus according to an embodiment of the present invention.
  • FIG. 4 is a diagram illustrating another example of a signal transmitted by a wireless signal processing apparatus according to an embodiment of the present invention.
  • FIG. 5 is a diagram illustrating a resource configuration in a general LTE network.
  • FIG. 6 is a diagram illustrating an example of a signal transmitted by a radio signal processing apparatus of a neighbor cell using the same reference signal according to an embodiment of the present invention.
  • FIG. 7 is a diagram illustrating an example in which adjacent cells use the same reference signal according to an embodiment of the present invention.
  • FIG. 8 is a diagram illustrating an example of a signal transmitted by radio signal processing apparatuses of neighboring cells according to an embodiment of the present invention.
  • (A) is an example of transmitting a signal from one cell to a terminal in a boundary section.
  • (b) shows an example of transmitting a signal using the same resource in another cell.
  • FIG. 9 is a block diagram of a digital signal processing apparatus according to an embodiment of the present invention.
  • a terminal is a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment (User Equipment). It may also refer to a user equipment (UE), an access terminal (AT), and the like, and may include all or some functions of a terminal, a mobile terminal, a subscriber station, a portable subscriber station, a user device, an access terminal, and the like.
  • a base station includes an access point (AP), a radio access station (RAS), a node B (Node B), an advanced node B (evolved NodeB, eNodeB), transmission and reception It may also refer to a base transceiver station (BTS), a mobile multihop relay (MMR) -BS, and the like. It may also include.
  • AP access point
  • RAS radio access station
  • Node B node B
  • evolved NodeB evolved NodeB, eNodeB
  • BTS base transceiver station
  • MMR mobile multihop relay
  • FIG. 1 is a schematic diagram of a network according to an embodiment of the present invention.
  • a network includes a radio signal processing unit (RU) 100, a digital signal processing unit (DU) 200, and a core system 300. do.
  • the wireless signal processing apparatus 100 and the digital signal processing apparatus 200 constitute a signal processing system of wireless communication.
  • the wireless signal processing apparatus 100 converts and amplifies a digital signal received from the digital signal processing apparatus 200 into a radio frequency (RF) signal according to a frequency band as a part of processing a wireless signal.
  • the wireless signal processing apparatus 100 is connected to a plurality of digital signal processing apparatus 200 (110, 120, 130), each of the wireless signal processing apparatus 100 is installed in the service target area, that is, the cell.
  • the wireless signal processing apparatus 100 and the digital signal processing apparatus 200 may be connected by an optical cable.
  • the digital signal processing apparatus 200 performs a process of encrypting and decrypting a wireless digital signal, and is connected to the core system 300. Unlike the wireless signal processing apparatus 100, the digital signal processing apparatus 200 is a server that is not installed in a service target area but mainly installed in a centralized communication station, and is a virtualized base station. The digital signal processing apparatus 200 transmits and receives signals with the plurality of wireless signal processing apparatuses 100.
  • the existing communication base station includes a processing unit corresponding to each of the wireless signal processing apparatus 100 and the digital signal processing apparatus 200 in one physical system, and one physical system is installed in a service target area.
  • the system according to the embodiment of the present invention physically separates the wireless signal processing apparatus 100 and the digital signal processing apparatus 200, and only the wireless signal processing apparatus 100 is installed in the service area.
  • the core system 300 processes a connection between the digital signal processing apparatus 200 and an external network, and includes a switch (not shown).
  • FIG. 2 is a schematic structural diagram of a cell according to an embodiment of the present invention.
  • the cells 10, 20, and 30 each include a plurality of wireless signal processing apparatuses 100.
  • the radio signal processing apparatus 100 includes macro radio signal processing apparatuses (macro RUs) 111 and 121 (macro RUs) and a plurality of cooperative RUs 112, 113, 114, 115, 116, and 117. , 122, 123, 124, 125, 126, and 127.
  • the macro radio signal processing apparatuses 111 and 121 manage main communication processing of the cells 10 and 20, and transmit signals to all terminals in the cells 10 and 20 with high power.
  • the cooperative radio signal processing apparatuses 112-117 and 122-127 transmit a signal to a terminal in the vicinity of the terminal with a smaller output power than that of the macro radio signal processing apparatuses 111 and 121.
  • One cell 10 includes at least one macro radio signal processing device 111 and a plurality of cooperative radio signal processing devices 112-117. All of the wireless signal processing apparatuses 100 included in the plurality of cells 10, 20, and 30 are controlled by the digital signal processing apparatus 200.
  • the wireless signal transmitted by the wireless signal processing device 100 to the terminal is a control signal (control signal) that informs the basic system information and data channel assignment information (data signal) for transmitting user data (data signal) and channel estimation, etc. It includes a reference signal for (reference signal).
  • the plurality of cooperative radio signal processing apparatuses 112-117 included in one cell 10 transmit the same control signal and reference signal as the macro radio signal processing apparatus 111 included in the same cell 10.
  • the wireless signal processing apparatus 100 included in different cells 10, 20, and 30 transmits different control signals and reference signals.
  • the reference signal transmitted by the radio signal processing apparatuses 111-117 included in the cell 10 and the reference signal transmitted by the radio signal processing apparatuses 121-127 included in the cell 20 are different from each other. .
  • the terminal can efficiently control the control signals and the reference signals that are commonly transmitted in the cell. Can be received.
  • the wireless signal processing apparatus (111-117, 121-127) uses two antennas to support the 2x2 Multiple Input Multiple Output (MIMO).
  • MIMO Multiple Input Multiple Output
  • the patterns of the reference signals used for the two antennas of the wireless signal processing apparatuses 111-117 and 121-127 should be different from each other.
  • the first antenna set to '0' among two antennas of the wireless signal processing device 111 uses the reference signal Ro as shown in FIG. 3, and is set to '1' among two antennas.
  • the second antenna may use the reference signal R 1 as shown in FIG. 4.
  • the first antennas of the respective antennas of the wireless signal processing apparatuses 111 to 117 are referred to.
  • the signal Ro is used, and all the second antennas use the reference signal R 1 .
  • the reference signals R 0 and R 1 may use resources according to orthogonal frequency division multiplexing (hereinafter, referred to as “OFDM”) as shown in FIGS. 3 and 4.
  • OFDM orthogonal frequency division multiplexing
  • the wireless signal processing apparatuses 111-117 included in one cell 10 may selectively transmit data signals using the same or different channels, respectively, and the cooperative wireless signal processing apparatuses 112-117 may use a macro.
  • the data signal is transmitted using the same channel used by the wireless signal processing device 111.
  • the position of the reference signal used for each cell depends on the physical cell identifier (Physical Cell IDentification, PCI). That is, a subcarrier using a reference signal is moved according to Equation 1 according to the physical cell identifier.
  • PCI Physical Cell IDentification
  • the reference signal at the position as shown in FIGS. 3 and 4 is used. However, if the physical cell identifier is a multiple of 6 + 1, the reference signal is moved up one space. In addition, if the physical cell identifier is a multiple of 6 + 2, it moves up two spaces. If the physical cell identifier is a multiple of 6 + 3, it is raised three spaces up to use the same reference signal position as the multiple of six. For example, when adjacent physical cell identifiers are used as 1, 4, 7, etc., all of the adjacent cells use the same reference signal position.
  • resource allocation in an LTE network is allocated in units of one resource block, and one resource block includes 12 subcarriers as shown in FIG. 5.
  • the bandwidth is 10MHz, there are 50 such resource blocks.
  • Each resource block is 0.5ms, and is allocated in pairs on the time axis, thereby allocating resources in units of two resource blocks in a subframe (1ms).
  • the three symbols located in front of each resource block are generally transmitted with a control channel for informing resource allocation information and the like.
  • FIG. 5 is a diagram illustrating an example of a signal transmitted by a plurality of wireless signal processing apparatuses included in a cell in a general network.
  • the cell 11 and the cell 12 are adjacent to each other so that the radio signal processing apparatus 111 within the cell 11 and the radio signal processing apparatus 112 within the cell 12 are also adjacent to each other.
  • the area of the wireless signal processing device 111 and the area of the wireless signal processing device 112 overlap each other, thereby generating the boundary area 13 thereof.
  • one wireless signal processing apparatus 111 supports one terminal 410
  • one wireless signal processing apparatus 112 includes one The terminal 420 will be supported.
  • the wireless signal processing apparatuses 111 and 112 and the terminals 410 and 420 have two antennas, respectively, to support the 2x2 multiple antenna technology.
  • both the first and second antennas 1111 and 1112 of the wireless signal processing apparatus 111 transmit the same signal to the terminal 410 as signals having different transmission patterns, that is, signals having different reference signals.
  • the first antenna 1121 and the second antenna 1122 of the wireless signal processing apparatus 112 both transmit the same signal to the terminal 420 as signals having different transmission patterns.
  • the same reference signals are used. That is, the same resource element is used for transmitting the reference signal.
  • the cell 11 and the cell 12 both use the same reference signal as shown in FIG. 7.
  • the reference signal illustrated in FIG. 7 simultaneously represents the reference signals used by two antennas.
  • the wireless signal processing apparatuses 111 and 112 transmit signals using different channel resources to prevent interference of signals transmitted to the terminals 410 and 420 in the boundary area 13. That is, referring to FIG. 6, the radio signal processing apparatus 111 of the cell 11 having the physical cell identifier X transmits a signal using the A resource block, and the cell 12 having the physical cell identifier X + 3. The radio signal processing apparatus 112 transmits a signal using the B resource block.
  • FIG. 8 is a diagram illustrating an example of a signal transmitted by radio signal processing apparatuses of neighboring cells according to an embodiment of the present invention, and (a) transmits a signal from one cell 11 to a terminal in a boundary section. (B) shows an example of transmitting a signal using the same resource in another cell 12.
  • each physical channel identifier corresponds to a multiple of 3 and consequently uses the same reference signal.
  • FIG. 8 corresponds to the cell 11 having the physical cell identifier X
  • (b) corresponds to the cell 12 having the physical cell identifier X + 3.
  • the resource block A of the radio signal processing apparatus 11 of the cell 11 is located in the terminal 410 in the boundary area 13.
  • the wireless signal processing apparatus 12 of the cell 12 of the cell 12 as shown in (b) of FIG. 8, the strength of the reference signal transmitted in the A resource block to reduce the interference between the reference signal Weaken
  • the shape of the resource allocated to the reference signal is changed to indicate that the size of the reference signal is weaker than that of the reference signal in FIG.
  • the cell 12 having the physical cell identifier X + 3 weakly transmits reference signals within the A resource block.
  • the cell 12 increases the strength of the reference signal in a resource block other than the resource block A, for example, the resource block B, for example, to compensate for the decrease in the strength of the reference signal in the resource block A.
  • the intensity of the reference signal transmitted throughout is kept constant. Through this, the RSRP (Received Signal Reference Powre) for the terminals is kept the same.
  • the reference signal of the cell 11 having the physical cell identifier X is reduced from the reference signal interference from the cell 12 having the physical cell identifier X + 3 so that the signal being transmitted through the resource block A is the channel of the reference signal.
  • Good estimation allows efficient signal transmission.
  • maintaining the strength of the reference signal in the cell 12 in the above may be performed by frequency selective scheduling (Frequency Selectivity Scheduling).
  • Frequency Selectivity Scheduling scheduling is performed to compensate for a smaller signal strength in consideration of the reference signal power transmitted for each band or reference signal. That is, in case of measuring the channel state for each resource block, if the value of lowering the reference signal of a specific resource block is ⁇ , the actual channel state is compensated by this value and the state is measured for each resource block. Allocating resources to resource blocks.
  • each of the two wireless signal processing apparatuses 111 and 112 measures the signal strength of the uplink received from the terminal 410 and transmits it to the digital signal processing apparatus 200. Then, the digital signal processing apparatus 200 may determine the terminal 410 based on the signal strength value Sa received from the wireless signal processing apparatus 111 and the signal strength value Sb received from the wireless signal processing apparatus 112. Evaluate uplink quality. That is, when the difference between the signal strength value Sa and the signal strength value Sb is less than or equal to the threshold value Sth, as shown in Equation 2, it may be determined that the terminal 410 is in the boundary region 13.
  • the terminal 410 If the difference between the signal strength value Sa and the signal strength value Sb is greater than the threshold value Sth, it is determined that the terminal 410 is in an area other than the boundary area 13 and the terminal 410 is located. Only the wireless signal processing apparatus corresponding to the region, that is, the signal strength value is large, transmits data to the terminal 410.
  • the threshold value Sth may be variously determined according to the capacity and needs of the wireless communication system.
  • the digital signal processing device 200 is the signal strength value Sa received from the wireless signal processing device 111 and the signal strength received from the wireless signal processing device 112.
  • the digital signal processing apparatus 200 determines that the wireless signal processing apparatus 111 of the cell 11 is in the boundary region 13. Control to transmit the data using the A resource block to the terminal 410 at the same time, while controlling the radio signal processing apparatus 112 of the cell 12 to weaken and transmit the strength of the reference signal in the A resource block. . At this time, the radio signal processing apparatus 112 of the cell 12 is strongly controlled so that the power of the entire reference signal remains constant with respect to the strength of the reference signal in other resource blocks except for the A resource block, for example, the B resource block. To control the transmission.
  • the digital signal processing apparatus 200 controls the wireless signal processing apparatuses 111 and 112 of the cells 11 and 12 to adjust the strength of the reference signal in the resource block, it will be apparent to those skilled in the art. Omit.
  • a digital signal processing apparatus 200 according to an embodiment of the present invention will now be described in detail with reference to FIG. 9.
  • FIG. 9 is a block diagram of a digital signal processing apparatus 200 according to an embodiment of the present invention.
  • the digital signal processing apparatus 200 includes a receiver 210, a determiner 220, and a processor 230.
  • the receiver 210 receives a radio signal from the radio signal processing apparatuses 111 and 112.
  • the radio signal includes an uplink signal strength value received by the radio signal processing apparatuses 111 and 112 from the terminals 410 and 420.
  • the determination unit 220 determines whether the terminal 410 is located in the boundary region 13 by performing an operation such as [Equation 2] or [Equation 3] based on the signal strength value received by the receiver 210. do.
  • the processor 230 performs a process for controlling data transmission of the wireless signal processing apparatuses 111 and 112 according to the determination of the determination unit 220.
  • the radio signal processing apparatus 111 of the cell 11 Instructs data to be transmitted using the A resource block, and instructs the radio signal processing apparatus 111 of the cell 11 to weaken and transmit the strength of the reference signal in the A resource block.
  • the degree of weakening the strength of the reference signal in the A resource block may be determined according to the policy of the wireless communication system or the policy of frequency selective scheduling.
  • the processor 230 instructs the radio signal processing apparatus 111 of the cell 112 to strongly adjust and transmit the strength of the reference signal included for the other resource blocks except for the A resource block.
  • the strength of the reference signal strength may be determined by frequency selective scheduling.

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Abstract

L'invention concerne un appareil, un système et un procédé de traitement de signaux numériques. Dans le système, l'appareil de traitement de signaux numériques est connecté à un système cœur et traite des signaux numériques sans fil. Une pluralité de dispositifs de traitement de signaux sans fil, qui sont physiquement séparés de l'appareil de traitement de signaux numériques, convertissent et amplifient des signaux numériques qui sont reçus en provenance de l'appareil de traitement de signaux numériques et envoient à un terminal les signaux amplifiés sur la base d'une technique multi-antenne utilisant deux antennes, et reçoivent les signaux qui sont émis par le terminal sur la base de la technique multi-antenne utilisant deux antennes et relaient les signaux vers l'appareil de traitement de signaux numériques. Le dispositif de traitement de signaux sans fil envoie des signaux à un terminal se trouvant dans une région de bordure d'une première cellule et d'une seconde cellule par utilisation d'une première ressource de la première cellule quand les première et seconde cellules sont adjacentes, et le dispositif de traitement de signaux sans fil qui se trouvent sur la seconde cellule émet des signaux par réduction de l'intensité d'un signal de référence, qui est inclus dans une première ressource de la seconde cellule, pour qu'elle soit plus faible que l'intensité d'un signal de référence inclus dans la première ressource de la première cellule.
PCT/KR2012/003222 2011-12-02 2012-04-26 Appareil de traitement de signaux numériques, système de traitement de signaux numériques et procédé de traitement de signaux numériques WO2013081257A1 (fr)

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KR10-2011-0128646 2011-12-02
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KR1020110142726A KR101311518B1 (ko) 2011-12-02 2011-12-26 디지털 신호 처리 장치, 신호 처리 시스템 및 신호 처리 방법

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WO2015093698A1 (fr) * 2013-12-16 2015-06-25 엘지전자 주식회사 Procédé pour effectuer des mesures dans un système de communication sans fil en nuage et dispositif associé au procédé
US9980273B2 (en) 2013-12-16 2018-05-22 Lg Electronics Inc. Method for performing measurement in cloud wireless communication system and device for same

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