WO2014014219A1 - Procédé et appareil de commande d'émission de signal de référence de sondage apériodique dans un réseau de communication mobile - Google Patents

Procédé et appareil de commande d'émission de signal de référence de sondage apériodique dans un réseau de communication mobile Download PDF

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Publication number
WO2014014219A1
WO2014014219A1 PCT/KR2013/005969 KR2013005969W WO2014014219A1 WO 2014014219 A1 WO2014014219 A1 WO 2014014219A1 KR 2013005969 W KR2013005969 W KR 2013005969W WO 2014014219 A1 WO2014014219 A1 WO 2014014219A1
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Prior art keywords
control channel
downlink control
reference signal
sounding reference
dci format
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PCT/KR2013/005969
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English (en)
Korean (ko)
Inventor
박규진
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주식회사 케이티
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Priority claimed from KR1020130063003A external-priority patent/KR20140012585A/ko
Application filed by 주식회사 케이티 filed Critical 주식회사 케이티
Publication of WO2014014219A1 publication Critical patent/WO2014014219A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • 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

Definitions

  • the present invention relates to a method and apparatus for controlling aperiodic sounding reference signal transmission in a mobile communication network. More particularly, the present invention relates to a technique for controlling transmission of an aperiodic sounding reference signal in a situation where a transmission point and a reception point are different.
  • LTE Long Term Evolution
  • LTE-A Long Term Advanced
  • 3GPP series High-speed and large-capacity communication systems that can transmit and receive various data such as video and wireless data, beyond voice-oriented services. Therefore, there is a demand for developing a technology capable of transmitting a large amount of data corresponding to a wired communication network.
  • As a method for transmitting a large amount of data data can be efficiently transmitted using a plurality of cells.
  • the present invention proposes a technique for controlling the transmission of the aperiodic sounding reference signal in a situation where the transmission point and the reception point are different.
  • the present invention proposes a method for controlling the transmission of an aperiodic sounding reference signal according to a characteristic of a downlink control channel and an apparatus for implementing the same.
  • the present invention proposes a plurality of aperiodic sounding reference signal settings for uplink channel estimation between any one terminal and a plurality of base stations / eNB / RU / RRH, and a method of operating a related terminal.
  • a method of controlling a transmission of an aperiodic sounding reference signal in a mobile communication network may include transmitting a first aperiodic sounding reference signal or a second aperiodic sounding reference signal of the terminal. Determining, and transmitting, to the terminal, a downlink control channel instructing generation of the determined sequence of the aperiodic sounding reference signal, wherein the first aperiodic sounding reference is referred to according to an attribute of the downlink control channel. Signal or the second aperiodic sounding reference signal is indicated.
  • a method of controlling a transmission of an aperiodic sounding reference signal in a mobile communication network comprising: receiving a downlink control channel instructing generation of a sequence of an aperiodic sounding reference signal from a transmission point; Generating a first aperiodic sounding reference signal to be transmitted to the transmission point according to an attribute of the downlink control channel or generating a second aperiodic sounding reference signal to be transmitted to a reception point distinct from the transmission point; and And transmitting the generated aperiodic sounding reference signal.
  • a transmission point is a receiver for receiving a signal from a terminal, and determines the aperiodic sounding reference signal or the second aperiodic sounding reference signal transmission of the terminal to determine the aperiodic sounding determined.
  • a control unit for generating a downlink control channel instructing generation of a sequence of a signal, and a transmitter for transmitting the generated downlink control channel to the terminal, the first aperiodic sounding according to the property of the downlink control channel.
  • a reference signal or the second aperiodic sounding reference signal may be indicated.
  • a terminal receives a downlink control channel instructing generation of a sequence of aperiodic sounding reference signal from a transmission point, the first transmission to the transmission point according to the property of the downlink control channel And a control unit for generating a non-periodic sounding reference signal or for generating a second aperiodic sounding reference signal to be transmitted to a reception point distinct from the transmission point, and a transmitter for transmitting the generated aperiodic sounding reference signal.
  • uplink channel state is measured for uplink frequency-dependent scheduling and uplink for downlink beamforming using channel reversibility. Controls the transmission of the sounding reference signal used to measure the channel state of the downlink to increase the transmission and reception efficiency of the signal.
  • 1 illustrates a method of transmitting uplink / downlink data.
  • FIG. 2 is a diagram illustrating a network situation in which a PUSCH collision of a terminal may occur.
  • 3 and 4 illustrate a configuration of a SoundingRS-UL-Config information element associated with a sounding reference signal.
  • FIG. 5 is a diagram illustrating that a reception device for aperiodic SRS transmission is determined according to a DCI format according to an embodiment of the present invention.
  • FIG. 6 is a diagram illustrating that a reception device for aperiodic SRS transmission is determined according to a DCI format according to another embodiment of the present invention.
  • FIG. 7 is a diagram illustrating that a reception device for aperiodic SRS transmission is determined according to a coupling level according to an embodiment of the present invention.
  • FIG. 8 is a view showing that the reception apparatus of the transmission of the aperiodic SRS is determined according to the coupling level according to another embodiment of the present invention.
  • FIG. 9 is a diagram illustrating a reception device for aperiodic SRS transmission according to a DCI format and a coupling level according to an embodiment of the present invention.
  • FIG. 10 is a diagram illustrating a process of a transmission point controlling aperiodic sounding reference signal transmission in a mobile communication network according to an embodiment of the present invention.
  • FIG. 11 is a diagram illustrating a process of a terminal controlling transmission of aperiodic sounding reference signal in a mobile communication network according to an embodiment of the present invention.
  • FIG. 12 is a diagram illustrating a configuration of a transmission point according to an embodiment of the present invention.
  • FIG. 13 is a diagram illustrating a configuration of a user terminal according to an embodiment of the present invention.
  • the wireless communication system in the present invention is widely deployed to provide various communication services such as voice, packet data, and the like.
  • the wireless communication system includes a user equipment (UE) and a base station (base station, BS, or eNB).
  • a user terminal is a comprehensive concept of a terminal in wireless communication.
  • UE user equipment
  • LTE Long Term Evolution
  • HSPA High Speed Packet Access
  • MS Mobile Station
  • UT User Terminal
  • SS Global System for Mobile communications
  • GSM Global System for Mobile communications
  • a base station or a cell generally refers to a station that communicates with a user terminal, and includes a Node-B, an evolved Node-B, an Sector, a Site, and a BTS. It may be called other terms such as a base transceiver system, an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and the like.
  • a base transceiver system an access point, a relay node, a remote radio head (RRH), a radio unit (RU), and the like.
  • a base station or a cell is interpreted in a comprehensive sense to indicate some areas or functions covered by a base station controller (BSC) in CDMA, a NodeB in WCDMA, an eNB or a sector (site) in LTE, and the like. Mega cell, macro cell, micro cell, pico cell, femto cell and relay node, RRH, RU communication range, etc. It is meant to encompass all of the various coverage areas.
  • BSC base station controller
  • the user terminal and the base station are two transmitting and receiving entities used to implement the technology or technical idea described in this specification in a comprehensive sense and are not limited by the terms or words specifically referred to.
  • the user terminal and the base station are two types of uplink or downlink transmitting / receiving subjects used to implement the technology or the technical idea described in the present invention, and are used in a generic sense and are not limited by the terms or words specifically referred to.
  • the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal
  • the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • OFDM-FDMA OFDM-TDMA
  • OFDM-CDMA OFDM-CDMA
  • One embodiment of the present invention is resource allocation in the fields of asynchronous wireless communication evolving to LTE and LTE-A (LTE-advanced) through GSM, WCDMA, HSPA, and synchronous wireless communication evolving to CDMA, CDMA-2000 and UMB.
  • LTE-advanced LTE-advanced
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • a standard is configured by configuring uplink and downlink based on one carrier or a pair of carriers.
  • the uplink and the downlink include a Physical Downlink Control CHannel (PDCCH), an Enhanced Physical Downlink Control Channel (EPDCCH), a Physical Control Format Indicator CHannel (PCFICH), a Physical Hybrid ARQ Indicator CHannel (PHICH), and a Physical Uplink Control CHannel (PUCCH).
  • Control information is transmitted through the same control channel, and data is configured by a data channel such as a physical downlink shared channel (PDSCH) and a physical uplink shared channel (PUSCH).
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • a cell means a component carrier having a coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.
  • a wireless communication system to which embodiments are applied may be a coordinated multi-point transmission / reception system (CoMP system) or a coordinated multi-antenna transmission scheme in which two or more transmission / reception points cooperate to transmit a signal.
  • antenna transmission system a cooperative multi-cell communication system.
  • the CoMP system may include at least two multiple transmission / reception points and terminals.
  • the multiple transmit / receive point is at least one having a base station or a macro cell (hereinafter referred to as an eNB) and a high transmission power or a low transmission power in a macro cell region, which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • an eNB a base station or a macro cell
  • a high transmission power or a low transmission power in a macro cell region which is wired controlled by an optical cable or an optical fiber to the eNB. May be RRH.
  • downlink refers to a communication or communication path from a multiple transmission / reception point to a terminal
  • uplink refers to a communication or communication path from a terminal to multiple transmission / reception points.
  • a transmitter may be part of multiple transmission / reception points, and a receiver may be part of a terminal.
  • a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.
  • a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH / EPDCCH, and a PDSCH may be described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH / EPDCCH, and a PDSCH.
  • the eNB performs downlink transmission to the terminals.
  • the eNB includes downlink control information and uplink data channels (eg, a physical downlink shared channel (PDSCH), which is a primary physical channel for unicast transmission, and scheduling required for reception of the PDSCH).
  • a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH) for transmitting scheduling grant information for transmission on a physical uplink shared channel (PUSCH) is transmitted.
  • PUSCH physical uplink shared channel
  • the first terminal UE1 may transmit an uplink signal to the eNB and the second terminal may transmit an uplink signal to the RRH.
  • the terminal 120 transmits and receives uplink and downlink control channels and data channels, and SRSs and RSs (reference signals) with the macro node 110, and other terminals 140 and 150 communicate with the pico node 130. Transmit and receive data channels and control channels.
  • the macro node 110 and the pico node 130 may have different cell IDs.
  • the terminal 120 receives the PDCCH or EPDCCH and / or PDSCH from the macro node 110, and transmits the PUSCH / PUCCH / SRS and related RS to the macro node 110.
  • RS can be transmitted.
  • FIG. 2 illustrates a case in which a downlink control channel and a data channel are received from a base station to which a corresponding terminal belongs, and all uplink related channels are transmitted to the corresponding base station with good geometry and channel quality.
  • 2 shows a situation of a network in which a PUSCH collision of a terminal may occur.
  • 281 indicates a downlink range (DL macro) of the first eNB / RU / RRH 210
  • 282 indicates a downlink range (DL pico) of the second eNB / RU / RRH 220.
  • the first terminal 232 receives the downlink 251 at the first eNB / RU / RRH 210, and the first eNB / RU / RRH 210 and the second eNB / RU / RRH 220. Performs uplink transmission (252, 255).
  • SRS Sounding Reference Signal
  • a trigger type 0 SRS is a periodic SRS transmission type transmitted by a corresponding UE with a certain period according to an RRC parameter set through higher layer signaling.
  • a predetermined SRS is set based on a separate RRC parameter from trigger type 0 SRS and the DCI format (Downlink Control Information format or Downlink Control Indicator format) 0/4 or DCI format 1A / 2B / 2C of the PDCCH.
  • DCI format Downlink Control Information format or Downlink Control Indicator format
  • Aperiodic SRS transmission type transmitted only when a corresponding SRS transmission request is made from a corresponding base station / eNB / RU / RRH through an 'SRS request' bit (s).
  • RRC parameters for trigger type 1 SRS transmission which are aperiodic SRS transmission
  • ConfigIndexAp-r10) and accordingly, there is a configuration parameter for transmitting the SRS in the corresponding subframe, SRS-ConfigAp-r10.
  • SRS-ConfigAp-r10 an antenna port indication (srs-AntennaPortAp-r10) for transmitting an aperiodic SRS, and a bandwidth (srs-BandwidthAp-r10) for transmitting an aperiodic SRS )
  • Location in the frequency domain for transmitting aperiodic SRS that is, physical resource block (PRB) offset information (freqDomainPositionAp-r10), and 2 subcarrier spacing intervals for transmitting aperiodic SRS.
  • the assigned frequency position designation (transmissionCombAp-r10, e.g. 0 (even subcarriers) or 1 (odd subcarriers)) and the cyclic shift index used to generate the SRS sequence ( cyclicShiftAp-r10).
  • the UE receives the RRC parameters for the aperiodic SRS transmission from the corresponding base station / eNB / RU / RRH through higher layer signaling, and based on this, the DCI format 0/4, which is a UL PUSCH scheduling grant of the PDCCH, and Aperiodic SRS is transmitted according to whether the SRS request field of DCI format 1A / 2B / 2C, which is a DL PDSCH scheduling grant, is set.
  • Resource mapping in PUSCH transmission includes: i) a PRB (Physical Resource Block) not used for RS transmission; ii) a PRB that is not part of the last SC-FDMA of the subframe if the UE uses the SRS in the same subframe. iii) a PRB that is not part of the last SC-FDMA of the subframe set to cell specific SRS when some or all of the cell specific SRS frequency band overlaps with the PUSCH transmission, iv) a UE specific aperiodic SRS subframe
  • the configuration of the SRS parameter sets that is, the bandwidth configuration and the subframe configuration, are as follows.
  • the parameter set is (srs-BandwidthConfig, srs-SubframeConfig), where srs-BandwidthConfig indicates bandwidth setting and srs-SubframeConfig indicates subframe setting.
  • the bandwidth setting of SRS, srs-BandwidthConfig consists of two parameters, C SRS and B SRS , and becomes cell-specific and terminal-specific parameters, respectively.
  • the information indicated by the parameter according to the resource block which is the system bandwidth is necessary for generating the sounding reference signal.
  • Wow (b 0, 1, 2, 3) as shown in Tables 1 to 4.
  • Tables 1 to 4 are tables showing SRS bandwidth setting parameters applicable to an embodiment of the present invention.
  • Table 1 shows the uplink bandwidth
  • Table 2 shows the uplink bandwidth
  • Table 3 shows the uplink bandwidth
  • Table 4 shows the uplink bandwidth If it is.
  • Tables 5 and 6 show SRS subframe configuration parameters that can be applied to an embodiment of the present invention.
  • Srs-SubframeConfig a parameter indicating a subframe, is divided as shown in Tables 5 and 6 according to the frame structure.
  • Table 5 is applicable to the frame structure type 1 (Frame structure type 1)
  • Table 6 is applicable to the frame structure 2 (Frame structure type 2).
  • T SFC is a subframe configuration period Means an offset (Transmission offset).
  • Table 7 shows values of T SRS , which is UE-specific SRS periodicity, and T offset , which is a subframe offset setting, in FDD in case of Type 0.
  • Table 8 shows values of T SRS , which is UE-specific SRS periodicity in TDD, and T offset , which is a subframe offset setting in TDD.
  • Table 9 shows K SRS in TDD.
  • Table 10 Type 1 If the specific terminal in FDD ever SRS period adult T SRS and the sub-frame offset setting, the value of T offset, Table 11 is the type 1, if TDD UE-specific SRS period adult T SRS and the sub in Shows the value of T offset , the frame offset setting.
  • 3 and 4 illustrate a configuration of a SoundingRS-UL-Config information element associated with a sounding reference signal. This is information necessary to specify a periodic or aperiodic uplink SRS.
  • the UE receives a downlink physical channel and a downlink physical signal from the corresponding UE, and also has the same eNB / RU / RRH for the uplink physical channel and the physical signals.
  • a macro by a macro eNB can be obtained.
  • CoMP scenario 4 in which the macro eNB and each RU / RRH uses the same cell ID
  • CoMP scenario 3 in which the macro eNB and each RU / RRH use different cell IDs and support them are supported. The definition of signaling for this is actively being made.
  • a DL / UL coverage mismatch case may occur. That is, an uplink channel with a second eNB / RU / RRH other than the corresponding first eNB / RU / RRH for any UE having the best downlink channel quality with any first eNB / RU / RRH. Often better quality and geometry will occur.
  • the downlink physical channel and the signal are received from the first eNB / RU / RRH, and the uplink physical channel and the signal are transmitted to the second eNB / RU / RRH.
  • TP transmission point
  • RP reception point
  • a node functioning as a macro node or integrating a node, a base station, a cell, an apparatus, an eNB, and the like that transmits a downlink signal is indicated by a transmission point, that is, a TP, and functions as a piconode or receives an uplink signal , Cells, devices, etc. are integrated to indicate the reception point, RP.
  • a joint reception (JR) technology for receiving and processing a PUSCH of a corresponding terminal simultaneously in a first eNB / RU / RRH and a second eNB / RU / RRH for improving a UL PUSCH transmission quality for a terminal located in a UL coverage boundary region;
  • DPS Dynamic Point Selection
  • uplink channel state measurement should be performed not only for the uplink with the first eNB / RU / RRH but also for the uplink with the second eNB / RU / RRH for link adaptation of the corresponding PUSCH transmission.
  • an SRS transmission method and a terminal operation method for this should be newly defined. That is, it is necessary to develop an SRS setting method and a terminal operation method designed to target a single base station to define an SRS setting method and a terminal operation method targeting a plurality of base stations.
  • a method of configuring an SRS request portion of the PDCCH format for triggering transmission of a UE for a configured aperiodic SRS as well as a configuration method through higher layer signaling, and a related UE It is necessary to extend the operation to a plurality of base stations / eNB / RU / RRH.
  • Embodiments of the present invention can be applied to aperiodic sounding reference signal (Aperiodic SRS) transmission of the terminal in the CoMP scenario 3 and CoMP scenario 4 environment in which the distributed base station / eNB / RU / RRH introduced.
  • Aperiodic SRS aperiodic sounding reference signal
  • the present invention proposes aperiodic SRS transmission, that is, trigger type 1 SRS transmission method of a terminal for UL CoMP application.
  • the present invention relates to an aperiodic (trigger type 1) SRS configuration method of a terminal applicable in the UL CoMP scenario described above, and an operation of a terminal related thereto.
  • the first eNB / RU / RRH to which the terminal is currently connected that is, a separate second eNB / RU / as a RP different from the first eNB / RU / RRH as a TP for transmitting a downlink channel and a signal for the terminal.
  • An SRS configuration method and a UE operation method for supporting aperiodic SRS transmission with RRH are proposed.
  • a ZC (Zadoff-Chu) sequence is used as a sequence for SRS for uplink channel estimation between an arbitrary UE and eNB / RU / RRH, and the base sequence for generating the corresponding SRS sequence is an eNB to which the UE belongs. It is generated as a function of a physical cell ID (PCID) of / RU / RRH and a slot index in which the corresponding SRS is transmitted.
  • PCID physical cell ID
  • the sequence group index and sequence index used for periodic and aperiodic SRS are derived from the sequence group index u used in PUCCH DM RS and at sequence hopping.
  • a sequence group index (u) and a sequence index (v) of the corresponding PUCCH DM RS are generated as a function of the PCID and the slot index.
  • the SRS sequence to be transmitted by the UE is determined by the cyclic shift index set through higher layer signaling based on the generated base sequence. Such SRS sequence generation is equally applied regardless of the SRS type.
  • a terminal specific VCID (Virtual cell ID) for generating an SRS sequence may be allocated to the SRS.
  • the VCID is implicitly assigned (or implicit) through a separate ⁇ VCID 1 , c init, 1 CSH ⁇ newly allocated for generating the PUSCH or PUCCH DM RS, or the VCID for only the separate SRS. Can be assigned separately.
  • the UL scheduling grant DCI format 0 and the DL scheduling grant DCI format 1A / 2B / 2C of the corresponding UE are based on the trigger type 1 SRS configuration information set through the RRC parameter. Whether the trigger type 1 SRS is transmitted or not is determined according to the aperiodic SRS triggering through the 1 bit SRS request field.
  • aperiodic SRS transmission is not triggered by the 2 bits SRS request field as shown in Table 12 below, or three aperiodic periods previously configured SRS transmission based on the aperiodic SRS parameter set of one of the SRS parameter sets is triggered.
  • the SRS request in case of not the DCI format 4 may be configured with 1 bit.
  • Table 12 shows an SRS request value for trigger type 1 in DCI format 4 in DCI format 4.
  • the PDCCH for the UE it is necessary to define a method of operation of the terminal when aperiodic SRS transmission is triggered through the SRS request field of the EPDCCH.
  • the aperiodic SRS transmission based on the first eNB / RU / RRH-based PCID and aperiodic SRS configuration information is called a first aperiodic SRS transmission
  • the newly set VCID and aperiodic SRS configuration Information-based aperiodic SRS transmission will be referred to as a second aperiodic SRS transmission.
  • the first aperiodic period is When an indication field for SRS transmission and a second aperiodic SRS transmission is additionally defined, not only an overhead problem of the PDCCH but also a second aperiodic to determine whether to include the corresponding indication field. It is not easy to provide a fallback operation method for solving the ambiguity between the terminal and the base station in the RRC configuration process for the SRS configuration.
  • the present invention provides a method of implicitly indicating the first aperiodic SRS transmission and the second aperiodic SRS transmission without defining an additional indication field.
  • aperiodic sounding reference signal Aperiodic SRS
  • embodiments of controlling aperiodic sounding reference signal (Aperiodic SRS) transmission of a UE in a CoMP scenario 3 and a CoMP scenario 4 environment in which a distributed base station / eNB / RU / RRH is introduced will be described.
  • the method is a method for determining which of the first aperiodic SRS and the second aperiodic SRS are transmitted according to the DCI format in which the aperiodic SRS is triggered. For example, when aperiodic SRS transmission is triggered through the SRS request field of DCI format 1A for a UE additionally configured with the second aperiodic SRS, the corresponding SRS is determined based on the first aperiodic SRS configuration.
  • the first aperiodic SRS and the second aperiodic SRS are mapped by dividing the DCI format corresponding to the UL scheduling grant and the DCI format corresponding to the DL scheduling grant. can do. That is, when aperiodic SRS transmission is triggered through DCI format 0/4 corresponding to the UL scheduling grant, the SRS is transmitted to the second eNB / RU / RRH according to the second aperiodic SRS configuration information.
  • the SRS may be transmitted to the first eNB / RU / RRH according to the first aperiodic SRS configuration information.
  • the SRS is transmitted to the first eNB / RU / RRH according to the first aperiodic SRS configuration information.
  • the corresponding SRS may be transmitted to the second eNB / RU / RRH according to the second aperiodic SRS configuration information.
  • it may be divided into an RRC configured DCI format and a fallback DCI format to determine whether to transmit the first aperiodic SRS and the second aperiodic SRS.
  • aperiodic SRS transmission is triggered through the SRS request field of DCI format 0 / 1A, which should perform blind decoding regardless of the channel state of the terminal and the capability of the terminal, And transmits the corresponding SRS to the first eNB / RU / RRH according to the aperiodic SRS configuration information, and through the SRS request fields of DCI format 4 and DCI format 2B / 2C set by the channel state of the terminal and the capability of the terminal.
  • aperiodic SRS transmission when aperiodic SRS transmission is triggered, it may be defined to transmit the corresponding SRS to the second eNB / RU / RRH according to the second aperiodic SRS configuration information. Or vice versa.
  • the DCI format mapped to the second aperiodic SRS transmission may be set together in a corresponding BS / eNB / RU / RRH and transmitted to the corresponding UE through higher layer signaling.
  • Method 1 When the first eNB / RU / RRH is an embodiment of a transmission point and the second eNB / RU / RRH is an embodiment of a reception point, an implementation of Method 1 will be described as follows.
  • the transmission of the first aperiodic SRS means the transmission of the aperiodic SRS to the transmission point
  • the transmission of the second aperiodic SRS means the transmission of the aperiodic SRS to the reception point.
  • DCI format In addition, to distinguish two types of DCI format, it is divided into two groups of first DCI format and second DCI format.
  • FIG. 5 is a diagram in which a reception device for aperiodic SRS transmission is determined as the transmission point or the reception point according to a DCI format according to an embodiment of the present invention.
  • the first DCI format may be DCI format 1A and the second DCI format may be DCI format 0.
  • the first DCI format may be DCI format 1A / 2B / 2C corresponding to a downlink scheduling grant
  • the second DCI format may be DCI format 0/4, which is a DCI format corresponding to an uplink scheduling grant.
  • the type of the DCI format corresponding to the first DCI format and the type of the DCI format corresponding to the second DCI format may be implemented such that only the DCI format or the reverse relationship of the above embodiment is applied.
  • the transmission point 501 transmits an SRS parameter for a second aperiodic SRS that the reception point 502 will receive to the terminal 509 (S510).
  • Transmitting the aperiodic SRS parameter to the terminal 509 means that the second aperiodic SRS is additionally set.
  • the terminal 509 stores the SRS parameter for the transmitted second aperiodic SRS (S515).
  • the transmission point 501 selects one of the transmission of the first aperiodic SRS or the second aperiodic SRS, the transmission point 501 performs the following steps S520 to S570.
  • the transmission point 501 selects transmission of the first aperiodic SRS (S520).
  • the transmission point 501 triggers the aperiodic SRS in the first DCI format to transmit the downlink control channel (S530).
  • the terminal 509 identifies the downlink control channel transmitted in the first DCI format (S535) and transmits the first aperiodic SRS (S540).
  • the first aperiodic SRS is received by the transmission point 501.
  • the transmission point 501 selects transmission of the second aperiodic SRS (S550).
  • the transmission point 501 triggers the aperiodic SRS in the second DCI format to transmit the downlink control channel (S560).
  • the terminal 509 checks the downlink control channel transmitted in the second DCI format (S565) and transmits the second aperiodic SRS (S570).
  • the second aperiodic SRS is received by the reception point 502.
  • the SRS request field is included in 2 bits in the case of DCI format 4, and the SRS request field is 01/10/11 as shown in Table 12. This means if it is. That is, the SRS triggering bits of the downlink control channel transmitted in S530 and S560 are set. For example, when the SRS triggering bit of the downlink control channel of the S530 is "01", the SRS sequence is generated by applying the first SRS parameter (1 st SRS parameter set) among the first aperiodic SRS parameters stored by the UE. As shown, aperiodic SRS may be transmitted.
  • SRS activation bit of a downlink control channel in S560 is "10" terminals to apply a second SRS parameters (2 nd SRS parameter set) of storing a second aperiodic SRS parameters to generate a SRS sequence steps S570
  • Aperiodic SRS may be transmitted.
  • the SRS request field in case of a format other than DCI format 4, may be 1 bit and may indicate whether a single aperiodic SRS is transmitted. The present invention is not limited to the size of this SRS request field.
  • FIG. 6 is a diagram of an apparatus for receiving aperiodic SRS transmission according to a DCI format according to another embodiment of the present invention.
  • the first DCI format may be a fallback DCI format
  • the second DCI format may be an RRC configured DCI format.
  • DCI format 0 / 1A which should be blind decoded regardless of the channel state or capability of the UE, may be the first DCI format.
  • Other DCI formats for example DCI format 4 / 2B / 2C, may be the second DCI format.
  • the type of the DCI format corresponding to the first DCI format and the type of the DCI format corresponding to the second DCI format may be implemented such that only the DCI format or the reverse relationship of the above embodiment is applied.
  • the transmission point 601 transmits an SRS parameter for a second aperiodic SRS that the reception point 602 will receive to the terminal 609 (S610).
  • the terminal 609 stores the SRS parameter for the transmitted second aperiodic SRS (S615). This is the same as S510 and S515 in FIG. 5.
  • the transmission point 601 selects one transmission of the first aperiodic SRS or the second aperiodic SRS, the transmission point 601 performs the following steps S620 to S670.
  • the transmission point 601 selects transmission of the first aperiodic SRS (S620).
  • the transmission point 601 triggers the aperiodic SRS in the first DCI format to transmit the downlink control channel (S630).
  • the UE determines that aperiodic SRS transmission is triggered in the DCI format (first format) in which the blind decoding is performed (S635), and transmits the first aperiodic SRS (S640).
  • the first aperiodic SRS is received by the transmission point 601.
  • the transmission point 601 selects transmission of the second aperiodic SRS (S650).
  • the transmission point 601 triggers the aperiodic SRS in the second DCI format to transmit the downlink control channel (S660).
  • the terminal 609 confirms that aperiodic SRS transmission is triggered in a DCI format (second format) in which blind decoding has not been performed (S665), and transmits a second aperiodic SRS (S670).
  • the second aperiodic SRS is received by the reception point 602.
  • the SRS request field is 01/10/11 as shown in Table 12.
  • the first aperiodic according to the control channel element (CCE) or enhanced control channel element (ECCE) aggregation level (ECCE) in which the corresponding DCI format is transmitted.
  • CCE control channel element
  • ECCE enhanced control channel element
  • ECCE aggregation level
  • the number of CCEs or ECCEs used for the DCI transmission that is, CCE or When the ECCE coupling level is 1 or 2, the corresponding SRS is transmitted to the TP according to the first aperiodic SRS configuration, and when the CCE or ECCE coupling level used for the DCI transmission is 4 or 8, the second aperiodic is performed.
  • the SRS may be transmitted to the RP according to the SRS setting.
  • the first aperiodic SRS transmission or the second aperiodic SRS transmission is determined as a function of the L value. That's how.
  • the eNB / RU / RRH receives 1,2,4,8 when the DCI is received through the combined level value (eg 1,2,4,8 or EPDCCH) for the newly configured second aperiodic SRS mapping.
  • the combined level value eg 1,2,4,8 or EPDCCH
  • Signal a reference value (threshold, threshold or limit) M, or a second non-periodic if the combined level L is greater than the reference value.
  • the SRS may be transmitted to the second eNB / RU / RRH according to the SRS configuration, and if not, the SRS may be transmitted to the TP according to the first aperiodic SRS configuration.
  • the SRS may be transmitted to the TP.
  • Method 2 When the first eNB / RU / RRH is an embodiment of a transmission point and the second eNB / RU / RRH is an embodiment of a reception point, an implementation of Method 2 will be described as follows.
  • the same method based on the aggregation level of the corresponding ECCE may be applied when receiving the DCI through the EPDCCH. Do.
  • the transmission of the first aperiodic SRS means the transmission of the aperiodic SRS to the transmission point
  • the transmission of the second aperiodic SRS means the transmission of the aperiodic SRS to the reception point.
  • CCE coupling level in the case of PDCCH In addition, in order to distinguish two types of coupling levels (CCE coupling level in the case of PDCCH, ECCE coupling level in the case of EPDCCH), it is divided into a first CCE coupling level and a second CCE coupling level.
  • FIG. 7 is a diagram of an apparatus for receiving aperiodic SRS transmission according to a coupling level according to an embodiment of the present invention.
  • the first CCE coupling level may be 1 or 2
  • the second CCE coupling level may be 4 or 8.
  • the coupling levels corresponding to the first CCE coupling level and the second CCE coupling level may be different according to an implementation process.
  • the transmission point 701 transmits an SRS parameter for a second aperiodic SRS to be received by the reception point 702 to the terminal 709 (S710).
  • Transmitting the aperiodic SRS parameter to the terminal 709 means that the second aperiodic SRS is additionally set.
  • the terminal 709 stores the SRS parameter for the transmitted second aperiodic SRS (S715).
  • the transmission point 701 selects one of the transmission of the first aperiodic SRS or the second aperiodic SRS, the transmission point 701 performs the following steps S720 to S770.
  • the transmission point 701 selects transmission of the first aperiodic SRS (S720).
  • the transmission point 701 triggers the aperiodic SRS at the first CCE combining level to transmit the downlink control channel (S730).
  • the terminal 709 confirms the downlink control channel configured with the first CCE combining level (for example, combining level 1 or 2) (S735) and transmits the first aperiodic SRS (S740).
  • the first aperiodic SRS is received by the transmission point 701.
  • the transmission point 701 selects transmission of the second aperiodic SRS (S750).
  • the transmission point 701 triggers the aperiodic SRS to the second CCE combining level (coupling level 4 or 8) to transmit the downlink control channel (S760).
  • the terminal 709 confirms the downlink control channel transmitted at the second CCE combining level (S765) and transmits a second aperiodic SRS (S770).
  • the second aperiodic SRS is received by the reception point 702.
  • the DCI format 4 when the DCI format 4 is an embodiment of the downlink control channel triggering the aperiodic SRS, it means that the SRS request field is 01/10/11 as shown in Table 12 in 2 bits. . Alternatively, this means that a 1-bit SRS request field is included in other DCI formats. That is, the SRS triggering bits of the downlink control channel transmitted in S730 and S760 are set. For example, when the SRS triggering bit of the downlink control channel of the S730 is "01", the SRS sequence is generated by applying the first SRS parameter (1 st SRS parameter set) among the first aperiodic SRS parameters stored by the UE. As shown, aperiodic SRS may be transmitted.
  • SRS activation bit of a downlink control channel in S760 is "10" terminals to apply a second SRS parameters (2 nd SRS parameter set) of storing a second aperiodic SRS parameters to generate a SRS sequence steps S770 Aperiodic SRS may be transmitted.
  • FIG. 8 is a diagram of a device for receiving aperiodic SRS transmission according to a coupling level according to another embodiment of the present invention.
  • FIG. 8 may indicate what the second CCE coupling level is for the second aperiodic SRS triggering.
  • the transmission point 801 transmits information on the SRS parameter and the second CCE combining level for the second aperiodic SRS to be received by the reception point 802 to the terminal 809 (S810).
  • the information on the second CCE binding level indicates what coupling level triggers the second aperiodic SRS, and indicates the value of the coupling level (eg, 1, 2) or provides a specific threshold value. can do. For example, if the terminal and the transmission point have previously promised, and the transmission point 801 transmits 4 in step S810, it is determined that the combined level of 4 or more corresponds to the second CCE combined level.
  • Transmitting the aperiodic SRS parameter to the terminal 809 means that the second aperiodic SRS is additionally set.
  • the terminal 809 stores the information on the SRS parameter and the second CCE combining level for the transmitted second aperiodic SRS (S815).
  • the transmission point 801 selects one transmission of the first aperiodic SRS or the second aperiodic SRS, the transmission point 801 performs the following steps S820 to S870. Since this is the same as the process of S720 to S770 of FIG. 7, it will be replaced with the description of FIG.
  • the method is a hybrid method of Method 1 and Method 2 to allow the first aperiodic SRS transmission to be performed in a fallback mode only for a specific coupling level of a specific DCI format.
  • the corresponding SRS is transmitted to the first eNB / RU / RRH according to the first aperiodic SRS configuration, and In other cases, the SRS may be transmitted to the second eNB / RU / RRH according to the setting of the second SRS.
  • the corresponding SRS is transmitted to the second eNB / RU / RRH according to the second aperiodic SRS setting.
  • FIG. 9 is a diagram of an apparatus for receiving aperiodic SRS transmission according to a DCI format and a coupling level according to an embodiment of the present invention.
  • triggering the first aperiodic SRS is the first DCI format and the first CCE combining level.
  • the transmission point 901 transmits an SRS parameter for a second aperiodic SRS that the reception point 902 will receive to the terminal 909 (S910). Transmitting the aperiodic SRS parameter to the terminal 909 means that the second aperiodic SRS is additionally set.
  • the terminal 909 stores the SRS parameter for the transmitted second aperiodic SRS (S915).
  • the transmission point 901 selects one of the transmission of the first aperiodic SRS or the second aperiodic SRS, the transmission point 901 performs the following steps S920 to S970.
  • the transmission point 901 selects transmission of the first aperiodic SRS (S920).
  • the transmission point 901 triggers the aperiodic SRS with the first DCI format and the first CCE combining level to transmit the downlink control channel (S930).
  • the terminal 909 identifies the downlink control channel configured with the first DCI format (eg DCI format 0/4) and the first CCE aggregation level (eg, coupling level 1 or 2) (S935).
  • Periodic SRS is transmitted (S940).
  • the first aperiodic SRS is received by the transmission point 901.
  • the transmission point 901 selects transmission of the second aperiodic SRS (S950).
  • the transmission point 901 transmits the downlink control channel by triggering the aperiodic SRS to be either the second DCI format or the second CCE combining level (coupling level 4 or 8) when the transmission of the second aperiodic SRS is selected.
  • the terminal 909 confirms the downlink control channel transmitted in one of the second DCI format or the second CCE combining level (S965) and transmits the second aperiodic SRS (S970).
  • the second aperiodic SRS is received by the reception point 902.
  • the SRS base sequence generation parameters may be differently based on the PCID and the VCID.
  • the first non-periodic SRS and the second non-periodic SRS are distinguished.
  • the method for distinguishing the first aperiodic SRS from the second aperiodic SRS is not limited thereto, and may be variously taken.
  • the first aperiodic SRS and the second aperiodic SRS may be generated based on the same base sequence parameter, and may be distinguished by changing some of the aperiodic SRS configuration parameters. That is, the first aperiodic SRS and the second aperiodic SRS both generate the sequence based on the PCID or the sequence based on the VCID, and the aperiodic SRS such as an SRS transmission bandwidth or a subframe offset. By setting different upper layer parameters for the transmission configuration, it is possible to distinguish the first aperiodic SRS from the second aperiodic SRS.
  • a power control parameter for transmitting an uplink control signal and a reference signal of a terminal is set differently, and applied to the terminal for a first aperiodic SRS transmission and a second aperiodic SRS transmission, respectively. It is possible to distinguish between the first aperiodic SRS transmission and the second aperiodic SRS transmission.
  • the present invention defines an aperiodic SRS transmission rule for a UE in which a second eNB / RU / RRH that is different from the first eNB / RU / RRH set to TP is set to RP, thereby determining the UE's capability in the UL CoMP scenario. It solves the ambiguity on aperiodic SRS transmission.
  • FIG. 10 is a diagram illustrating a process of a transmission point controlling aperiodic sounding reference signal transmission in a mobile communication network according to an embodiment of the present invention.
  • the transmission point transmits a parameter set for transmitting the second aperiodic sounding reference signal to the terminal (S1010). Then, the first aperiodic sounding reference signal or the second aperiodic sounding reference signal transmission of the terminal is determined (S1020). Thereafter, the UE transmits a downlink control channel instructing generation of the sequence of the determined aperiodic sounding reference signal. The terminal transmits a first aperiodic sounding reference signal or the second aperiodic sounding reference signal indicated according to an attribute of the downlink control channel.
  • the downlink control channel is divided into two groups of the first DCI format and the second DCI format based on the DCI format, and the downlink control channel is the first.
  • the first aperiodic sounding reference signal is indicated.
  • the second aperiodic sounding reference signal is indicated. This has been described with reference to FIGS. 5 and 6.
  • the attributes of the downlink control channel is divided into two groups, the first CCE coupling level and the second CCE coupling level based on the CCE coupling level or the ECCE coupling level.
  • the downlink control channel indicates the first aperiodic sounding reference signal when the downlink control channel is the second CCE coupling level.
  • the downlink control channel indicates the second aperiodic sounding reference signal when the downlink control channel is the second CCE coupling level. This is illustrated in FIGS. 7 and 8.
  • the attributes of the downlink control channel are divided into two groups of the first DCI format and the second DCI format based on the DCI format, and the attributes of the downlink control channel are combined with CCE.
  • a channel indicates a first aperiodic sounding reference signal or the second aperiodic sounding reference signal. This has been described in FIG. 9.
  • FIG. 11 is a diagram illustrating a process of a terminal controlling transmission of aperiodic sounding reference signal in a mobile communication network according to an embodiment of the present invention.
  • the terminal receives from the transmission point a parameter set necessary for transmitting the second aperiodic sounding reference signal (S1110). Thereafter, a downlink control channel for generating a sequence of aperiodic sounding reference signal is received from the transmission point (S1120). The terminal generates a first aperiodic sounding reference signal to be transmitted to the transmission point according to the property of the downlink control channel or generates a second aperiodic sounding reference signal to be transmitted to a reception point distinct from the transmission point (S1130). In step S1140, the generated aperiodic sounding reference signal is transmitted.
  • the downlink control channel is divided into two groups of the first DCI format and the second DCI format based on the DCI format, and the downlink control channel is the first.
  • the first aperiodic sounding reference signal is indicated.
  • the second aperiodic sounding reference signal is indicated. This has been described with reference to FIGS. 5 and 6.
  • the attributes of the downlink control channel is divided into two groups, the first CCE coupling level and the second CCE coupling level based on the CCE coupling level or the ECCE coupling level.
  • the downlink control channel indicates the first aperiodic sounding reference signal when the downlink control channel is the second CCE coupling level.
  • the downlink control channel indicates the second aperiodic sounding reference signal when the downlink control channel is the second CCE coupling level. This is illustrated in FIGS. 7 and 8.
  • the attributes of the downlink control channel are divided into two groups of the first DCI format and the second DCI format based on the DCI format, and the attributes of the downlink control channel are combined with CCE.
  • a channel indicates a first aperiodic sounding reference signal or the second aperiodic sounding reference signal. This has been described in FIG. 9.
  • FIG. 12 is a diagram illustrating a configuration of a transmission point according to an embodiment of the present invention.
  • a transmission point 1200 includes a controller 1210, a transmitter 1220, and a receiver 1230.
  • the controller 1210 performs operations of the entire base station according to a plurality of aperiodic sounding reference signal settings for uplink channel estimation between any one terminal and a plurality of base stations / eNB / RU / RRH. To control.
  • the transmitter 1220 and the receiver 1230 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.
  • the receiver 1230 receives a signal from a terminal.
  • the controller 1210 determines to transmit a first aperiodic sounding reference signal or a second aperiodic sounding reference signal of the terminal to generate a downlink control channel instructing generation of the determined aperiodic sounding reference signal. do.
  • the transmitter 1220 transmits the generated downlink control channel to the terminal. According to the property of the downlink control channel, a first aperiodic sounding reference signal or the second aperiodic sounding reference signal is indicated.
  • control unit 1210 generates a downlink control channel to indicate the first aperiodic sounding reference signal or the second aperiodic sounding reference signal according to the property of the downlink control channel.
  • the downlink control channel is divided into two groups of the first DCI format and the second DCI format based on the DCI format, and the downlink control channel is the first DCI format.
  • the first non-periodic sounding reference signal is indicated when the downlink control channel is a second DCI format indicates the second aperiodic sounding reference signal. This has been described with reference to FIGS. 5 and 6.
  • the attributes of the downlink control channel is divided into two groups, the first CCE coupling level and the second CCE coupling level based on the CCE coupling level or the ECCE coupling level.
  • the downlink control channel indicates the first aperiodic sounding reference signal when the downlink control channel is the second CCE coupling level.
  • the downlink control channel indicates the second aperiodic sounding reference signal when the downlink control channel is the second CCE coupling level. This is illustrated in FIGS. 7 and 8.
  • the attributes of the downlink control channel are divided into two groups of the first DCI format and the second DCI format based on the DCI format, and the attributes of the downlink control channel are combined with CCE.
  • a channel indicates a first aperiodic sounding reference signal or the second aperiodic sounding reference signal. This has been described in FIG. 9.
  • FIG. 13 is a diagram illustrating a configuration of a user terminal according to an embodiment of the present invention.
  • a user terminal 1300 includes a receiver 1330, a controller 1310, and a transmitter 1320.
  • the receiver 1330 receives downlink control information, data, and a message from a base station through a corresponding channel.
  • control unit 1310 according to the overall terminal 1300 according to the configuration of a plurality of aperiodic sounding reference signals for uplink channel estimation between any one terminal and a plurality of base stations / eNB / RU / RRH to perform the above-described present invention Control the operation of
  • the transmitter 1320 transmits downlink control information, data, and a message to a base station through a corresponding channel.
  • the receiver 1330 instructs generation of a sequence of an aperiodic sounding reference signal from a transmission point.
  • the controller 1310 may generate a first aperiodic sounding reference signal to be transmitted to the transmission point or transmit a second aperiodic sounding reference signal to be transmitted to a reception point distinct from the transmission point according to the property of the downlink control channel.
  • Create The transmitter 1320 transmits the generated aperiodic sounding reference signal.
  • Whether the controller 1310 generates the first aperiodic sounding reference signal or the second aperiodic sounding reference signal may be determined according to the property of the downlink control channel.
  • the downlink control channel is divided into two groups of a first DCI format and a second DCI format based on a DCI format, and the downlink control channel is defined as a first.
  • the first aperiodic sounding reference signal is indicated.
  • the second aperiodic sounding reference signal is indicated. This has been described with reference to FIGS. 5 and 6.
  • the attributes of the downlink control channel is divided into two groups, the first CCE coupling level and the second CCE coupling level based on the CCE coupling level or the ECCE coupling level.
  • the downlink control channel indicates the first aperiodic sounding reference signal when the downlink control channel is the second CCE coupling level.
  • the downlink control channel indicates the second aperiodic sounding reference signal when the downlink control channel is the second CCE coupling level. This is illustrated in FIGS. 7 and 8.
  • the attributes of the downlink control channel are divided into two groups of the first DCI format and the second DCI format based on the DCI format, and the attributes of the downlink control channel are combined with CCE.
  • a channel indicates a first aperiodic sounding reference signal or the second aperiodic sounding reference signal. This has been described in FIG. 9.
  • uplink for uplink frequency-dependent scheduling It is necessary to transmit a sounding reference signal (SRS) used for measuring channel conditions and measuring channel conditions of uplink and downlink for downlink beamforming using channel reciprocity.
  • SRS sounding reference signal
  • the embodiments of the present invention control the transmission of the sounding reference signal to increase the transmission and reception efficiency of the signal in the context of a cooperative transmission / reception system or a heterogeneous network.
  • the parameter set is used to trigger the aperiodic sounding reference signal while receiving the first eNB / RU / RRH (transmission point) which parameter set the aperiodic sounding reference signal uses.
  • Whether or not to use the parameter set to be received by the second eNB / RU / RRH (receive point) can be indicated according to the intrinsic characteristics such as the DCI format of the downlink control channel or the CCE coupling level without a separate information field, The efficiency of the transmitted and received signals can be improved. To this end, it may be controlled to transmit the corresponding aperiodic sounding reference signal for the DCI format and the CCE combining level suitable for the first or second eNB / RU / RRH.

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

Abstract

La présente invention porte sur un procédé et un appareil de commande d'émission d'un signal de référence de sondage apériodique dans un réseau de communication mobile. Selon un mode de réalisation de la présente invention, le procédé pour permettre à un point d'émission de commander l'émission du signal de référence de sondage apériodique dans le réseau de communication mobile consiste à : déterminer l'émission d'un premier signal de référence de sondage apériodique ou d'un second signal de référence de sondage apériodique d'un terminal ; et émettre au terminal un canal de commande de liaison descendante pour indiquer une génération de séquence du signal de référence de sondage apériodique déterminé, le premier signal de référence de sondage apériodique ou le second signal de référence de sondage apériodique étant indiqué conformément à une propriété du canal de commande de liaison descendante.
PCT/KR2013/005969 2012-07-19 2013-07-05 Procédé et appareil de commande d'émission de signal de référence de sondage apériodique dans un réseau de communication mobile WO2014014219A1 (fr)

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KR20120078797 2012-07-19
KR10-2012-0078797 2012-07-19
KR10-2013-0063003 2013-05-31
KR1020130063003A KR20140012585A (ko) 2012-07-19 2013-05-31 이동통신망에서의 비주기적 사운딩 참조신호 전송 제어 방법 및 장치

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KR20070075748A (ko) * 2006-01-16 2007-07-24 엘지전자 주식회사 릴레이 스테이션을 포함하는 통신 시스템에서의 채널 상태보고 방법
KR20100034687A (ko) * 2008-09-24 2010-04-01 엘지전자 주식회사 무선통신 시스템에서의 상향링크와 하향링크를 위한 무선자원의 관리 방법
KR20110133448A (ko) * 2010-06-04 2011-12-12 엘지전자 주식회사 단말의 비주기적 사운딩 참조신호 트리거링 기반 ｓｒｓ 전송 방법 및 비주기적 ｓｒｓ를 전송하기 위한 상향링크 전송 전력을 제어 방법
US20120039273A1 (en) * 2010-08-12 2012-02-16 Samsung Electronics Co., Ltd. Apparatus and method for transmission of uplink sounding reference signals in a wireless network
KR101128817B1 (ko) * 2009-05-15 2012-03-23 엘지전자 주식회사 무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치

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KR20070075748A (ko) * 2006-01-16 2007-07-24 엘지전자 주식회사 릴레이 스테이션을 포함하는 통신 시스템에서의 채널 상태보고 방법
KR20100034687A (ko) * 2008-09-24 2010-04-01 엘지전자 주식회사 무선통신 시스템에서의 상향링크와 하향링크를 위한 무선자원의 관리 방법
KR101128817B1 (ko) * 2009-05-15 2012-03-23 엘지전자 주식회사 무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치
KR20110133448A (ko) * 2010-06-04 2011-12-12 엘지전자 주식회사 단말의 비주기적 사운딩 참조신호 트리거링 기반 ｓｒｓ 전송 방법 및 비주기적 ｓｒｓ를 전송하기 위한 상향링크 전송 전력을 제어 방법
US20120039273A1 (en) * 2010-08-12 2012-02-16 Samsung Electronics Co., Ltd. Apparatus and method for transmission of uplink sounding reference signals in a wireless network

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