WO2017183779A1 - Procédé de transmission de srs dans un système de communication sans fil, et équipement d'utilisateur associé - Google Patents

Procédé de transmission de srs dans un système de communication sans fil, et équipement d'utilisateur associé Download PDF

Info

Publication number
WO2017183779A1
WO2017183779A1 PCT/KR2016/011192 KR2016011192W WO2017183779A1 WO 2017183779 A1 WO2017183779 A1 WO 2017183779A1 KR 2016011192 W KR2016011192 W KR 2016011192W WO 2017183779 A1 WO2017183779 A1 WO 2017183779A1
Authority
WO
WIPO (PCT)
Prior art keywords
srs
transmission
terminal
base station
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2016/011192
Other languages
English (en)
Korean (ko)
Inventor
최국헌
변일무
김기준
이길봄
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of WO2017183779A1 publication Critical patent/WO2017183779A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station

Definitions

  • the present invention relates to wireless communication, and more particularly, to a method for transmitting an SRS in a wireless communication system and a terminal for the same.
  • the beam scanning procedure has a lot of processing overhead in itself, it is not possible to shorten the beam scanning in an extreme period.
  • the temporal change of channels above 6 GHz is likely to change faster than existing sub-6 GHz channels due to the additional channel factors mentioned above.
  • the BS beam configuration may be fixed, but the beam of the UE may be changed according to the location of the serving cell, the change of the surrounding environment, the UE behavior pattern, and the like. That is, the Tx / Rx beam mismatch is likely to occur within the beam scanning interval. Therefore, a beam tracking technique is needed to overcome this.
  • An object of the present invention is to provide a method for transmitting an SRS by a terminal in a wireless communication system.
  • Another object of the present invention is to provide a terminal for transmitting an SRS in a wireless communication system.
  • a method for transmitting an SRS by a terminal in a wireless communication system includes: determining an SRS configuration index by measuring a change value of a received signal strength for a specific time; Determining index information related to an SRS transmission period corresponding to the determined SRS configuration index and specific transmission beam candidate set index information of the terminal based on predefined SRS configuration information; Transmitting index information related to the SRS transmission period and the specific transmission beam candidate set index information to the base station; And transmitting the SRS to the base station based on at least one transmission beam identifier (ID) candidate information corresponding to the specific transmission beam candidate set index information.
  • ID transmission beam identifier
  • the predefined SRS configuration information may include a physical SRS transmission period value corresponding to the determined SRS configuration index and an SRS subframe offset value corresponding to the determined SRS configuration index.
  • the specific transmission beam candidate set index information may be determined based on index information related to the SRS transmission period corresponding to the determined SRS configuration index or a physical SRS transmission period value.
  • the at least one transmit beam identifier (ID) candidate information includes at least one transmit beam identifier candidate corresponding to the determined transmit beam candidate set index information, and is respectively assigned to the at least one transmit beam identifier (ID) candidate.
  • SRS may be transmitted through a symbol.
  • the method comprises the steps of: receiving an optimal transmission beam identifier (ID) and uplink resource allocation information of the terminal from the base station; And performing uplink transmission by using a transmission beam corresponding to the optimal transmission beam identifier (ID).
  • the method may further include performing beam scanning with the base station, wherein the base station is paired with a transmission beam of the terminal and a transmission beam of the terminal based on beam pair information between the terminal and the base station determined by the beam scanning. Uplink transmission may be performed based on a reception beam of.
  • a terminal for transmitting an SRS in a wireless communication system the transmitter; And a processor,
  • the processor determines an SRS configuration index by measuring a change value of a received signal strength for a specific time, and index information related to an SRS transmission period corresponding to the determined SRS configuration index based on predefined SRS configuration information and the terminal's index. Determine specific transmission beam candidate set index information, and wherein the transmitter transmits index information related to the SRS transmission period and the specific transmission beam candidate set index information to the base station, and corresponds to the specific transmission beam candidate set index information.
  • the SRS may be controlled to be transmitted to the base station based on at least one transmission beam identifier (ID) candidate information.
  • ID transmission beam identifier
  • the predefined SRS configuration information may include a physical SRS transmission period value corresponding to the determined SRS configuration index and an SRS subframe offset value corresponding to the determined SRS configuration index.
  • the processor may determine the determined transmission beam candidate set index information based on index information associated with the SRS transmission period or a physical SRS transmission period value corresponding to the determined SRS configuration index.
  • the at least one transmit beam identifier (ID) candidate information includes at least one transmit beam identifier candidate corresponding to the determined transmit beam candidate set index information, and wherein the processor is further configured to transmit the SRS to the at least one transmit beam identifier. (ID) can be controlled to transmit through the symbols assigned to each candidate.
  • the terminal further includes a receiver, wherein the processor controls the receiver to receive an optimal terminal transmit beam identifier (ID) and uplink resource allocation information from the base station, and the processor is configured to allow the transmitter to optimize the terminal. It may be controlled to perform uplink transmission by using a transmission beam corresponding to a transmission beam identifier (ID).
  • ID transmit beam identifier
  • ID uplink resource allocation information
  • the processor is configured to perform beam scanning with the base station, and wherein the transmitter is configured to transmit and transmit a transmission beam of the terminal and a transmission beam of the terminal based on beam pair information between the terminal and the base station determined by the beam scanning. It may be controlled to perform uplink transmission based on the received beams of the paired base stations.
  • the efficient resource allocation of the SRS for the UE transmission beam tracking in the base station reception beam and the UE transmission beam pair and the adaptive beam tracking procedure according to the behavior pattern of each UE are efficiently presented. Communication is possible.
  • FIG. 1 is a block diagram showing the configuration of a base station 105 and a terminal 110 in a wireless communication system 100.
  • FIG. 2A is a diagram illustrating a time when meaningful blockage occurs in Series of blockage event duration in Table 2
  • FIG. 2B is a diagram illustrating blockage duration (t D ) in Table 2.
  • FIG. 4 is a diagram illustrating an example of a structure of a synchronization subframe.
  • FIG. 5 is a diagram illustrating a beam scanning period and a resource area (for example, 5 ⁇ N ms periods).
  • terminal transmission beam ID number 8
  • FIG. 7 is a diagram illustrating measured RSRP change of each downlink terminal.
  • FIG. 9 is a diagram illustrating an SRS transmission method according to a terminal transmission beam candidate index.
  • FIG. 10 is a diagram illustrating a flowchart for UE-specific periodic SRS transmission proposed in the present invention.
  • a terminal collectively refers to a mobile or fixed user terminal device such as a user equipment (UE), a mobile station (MS), an advanced mobile station (AMS), and the like.
  • the base station collectively refers to any node of the network side that communicates with the terminal such as a Node B, an eNode B, a Base Station, and an Access Point (AP).
  • UE user equipment
  • MS mobile station
  • AMS advanced mobile station
  • AP Access Point
  • a terminal or a user equipment may receive information from a base station through downlink, and the terminal may also transmit information through uplink.
  • the information transmitted or received by the terminal includes data and various control information, and various physical channels exist according to the type and purpose of the information transmitted or received by the terminal.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA).
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3rd Generation Partnership Project (3GPP) long term evolution (LTE) employs OFDMA in downlink and SC-FDMA in uplink as part of Evolved UMTS (E-UMTS) using E-UTRA.
  • LTE-A Advanced is an evolution of 3GPP LTE.
  • FIG. 1 is a block diagram showing the configuration of a base station 105 and a terminal 110 in a wireless communication system 100.
  • the wireless communication system 100 may include one or more base stations and / or one or more terminals. .
  • the base station 105 includes a transmit (Tx) data processor 115, a symbol modulator 120, a transmitter 125, a transmit / receive antenna 130, a processor 180, a memory 185, and a receiver ( 190, a symbol demodulator 195, and a receive data processor 197.
  • the terminal 110 transmits (Tx) the data processor 165, the symbol modulator 170, the transmitter 175, the transmit / receive antenna 135, the processor 155, the memory 160, the receiver 140, and the symbol. It may include a demodulator 155 and a receive data processor 150.
  • the base station 105 and the terminal 110 are provided with a plurality of transmit and receive antennas. Accordingly, the base station 105 and the terminal 110 according to the present invention support a multiple input multiple output (MIMO) system. In addition, the base station 105 according to the present invention may support both a single user-MIMO (SU-MIMO) and a multi-user-MIMO (MU-MIMO) scheme.
  • MIMO multiple input multiple output
  • SU-MIMO single user-MIMO
  • MU-MIMO multi-user-MIMO
  • the transmit data processor 115 receives the traffic data, formats the received traffic data, codes it, interleaves and modulates (or symbol maps) the coded traffic data, and modulates the symbols ("data"). Symbols ").
  • the symbol modulator 120 receives and processes these data symbols and pilot symbols to provide a stream of symbols.
  • the symbol modulator 120 multiplexes the data and pilot symbols and sends it to the transmitter 125.
  • each transmission symbol may be a data symbol, a pilot symbol, or a signal value of zero.
  • pilot symbols may be sent continuously.
  • the pilot symbols may be frequency division multiplexed (FDM), orthogonal frequency division multiplexed (OFDM), time division multiplexed (TDM), or code division multiplexed (CDM) symbols.
  • Transmitter 125 receives the stream of symbols and converts it into one or more analog signals, and further adjusts (eg, amplifies, filters, and frequency upconverts) the analog signals to provide a wireless channel. Generates a downlink signal suitable for transmission via the transmission antenna 130, the transmission antenna 130 transmits the generated downlink signal to the terminal.
  • the receiving antenna 135 receives the downlink signal from the base station and provides the received signal to the receiver 140.
  • Receiver 140 adjusts the received signal (eg, filtering, amplifying, and frequency downconverting), and digitizes the adjusted signal to obtain samples.
  • the symbol demodulator 145 demodulates the received pilot symbols and provides them to the processor 155 for channel estimation.
  • the symbol demodulator 145 also receives a frequency response estimate for the downlink from the processor 155 and performs data demodulation on the received data symbols to obtain a data symbol estimate (which is an estimate of the transmitted data symbols). Obtain and provide data symbol estimates to a receive (Rx) data processor 150. Receive data processor 150 demodulates (ie, symbol de-maps), deinterleaves, and decodes the data symbol estimates to recover the transmitted traffic data.
  • the processing by symbol demodulator 145 and receiving data processor 150 is complementary to the processing by symbol modulator 120 and transmitting data processor 115 at base station 105, respectively.
  • the terminal 110 is on the uplink, and the transmit data processor 165 processes the traffic data to provide data symbols.
  • the symbol modulator 170 may receive and multiplex data symbols, perform modulation, and provide a stream of symbols to the transmitter 175.
  • the transmitter 175 receives and processes a stream of symbols to generate an uplink signal.
  • the transmit antenna 135 transmits the generated uplink signal to the base station 105.
  • an uplink signal is received from the terminal 110 through the reception antenna 130, and the receiver 190 processes the received uplink signal to obtain samples.
  • the symbol demodulator 195 then processes these samples to provide received pilot symbols and data symbol estimates for the uplink.
  • the received data processor 197 processes the data symbol estimates to recover the traffic data transmitted from the terminal 110.
  • Processors 155 and 180 of the terminal 110 and the base station 105 respectively instruct (eg, control, coordinate, manage, etc.) operations at the terminal 110 and the base station 105, respectively.
  • Respective processors 155 and 180 may be connected to memory units 160 and 185 that store program codes and data.
  • the memory 160, 185 is coupled to the processor 180 to store the operating system, applications, and general files.
  • the processors 155 and 180 may also be referred to as controllers, microcontrollers, microprocessors, microcomputers, or the like.
  • the processors 155 and 180 may be implemented by hardware or firmware, software, or a combination thereof.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs Field programmable gate arrays
  • the firmware or software may be configured to include a module, a procedure, or a function for performing the functions or operations of the present invention, and to perform the present invention.
  • the firmware or software configured to be may be provided in the processors 155 and 180 or stored in the memory 160 and 185 to be driven by the processors 155 and 180.
  • the layers of the air interface protocol between the terminal and the base station between the wireless communication system (network) are based on the lower three layers of the open system interconnection (OSI) model, which is well known in the communication system. ), And the third layer L3.
  • the physical layer belongs to the first layer and provides an information transmission service through a physical channel.
  • a Radio Resource Control (RRC) layer belongs to the third layer and provides control radio resources between the UE and the network.
  • the terminal and the base station may exchange RRC messages through the wireless communication network and the RRC layer.
  • the processor 155 of the terminal and the processor 180 of the base station process the signals and data, except for the function of receiving or transmitting the signal and the storage function of the terminal 110 and the base station 105, respectively.
  • the following description does not specifically refer to the processors 155 and 180.
  • the processors 155 and 180 it may be said that a series of operations such as a function of receiving or transmitting a signal and a data processing other than a storage function are performed.
  • the terminal For Tx beam tracking of the terminal, the terminal needs to transmit the SRS according to each candidate terminal transmission beam (Tx beam). Since SRS transmission according to many beam directions (transmission beam set of UE in all directions) generates a large amount of resource loss, according to the present invention, SRS transmission is flexibly transmitted according to UE change pattern, thereby adaptive UE transmission.
  • Tx beam candidate terminal transmission beam
  • a UE shall transmit Sounding Reference Symbol (SRS) on per serving cell SRS resources based on two trigger types:-trigger type 0: higher layer signaling-trigger type 1: DCI formats 0/4 / 1A for FDD and TDD and DCI formats 2B / 2C / 2D for TDD.
  • SRS Sounding Reference Symbol
  • a UE may be configured with SRS parameters for trigger type 0 and trigger type 1 on each serving cell.
  • SRS parameters are serving cell specific and semi-statically configurable by higher layers for trigger type 0 and for trigger type 1.
  • -Transmission comb as defined in subclause 5.5.3.2 of [3] for trigger type 0 and each configuration of trigger type 1-Starting physical resource block assignment n RRC , as defined in subclause 5.5.3.2 of [3] for trigger type 0 and each configuration of trigger type 1-duration: single or indefinite (until disabled), as defined in [11] for trigger type 0-srs-ConfigIndex I SRS for SRS periodicity T SRS and SRS subframe offset T offset , as defined in Table 8.2-1 and Table 8.2-2 for trigger type 0 and SRS periodicity T SRS, 1 , and SRS subframe offset T SRS, 1 , as defined in Table 8.2-4 and Table 8.2-5 trigger type 1-SRS bandwidth B SRS , as defined in subclause 5.5.3.2 of [3] for trigger type 0 and each configuration of trigger type 1-Frequency hopping bandwidth, b hop , as
  • the 2-bit SRS request field [4] in DCI format 4 indicates the SRS parameter set given in Table 8.1-1.
  • a single set of SRS parameters srs-ConfigApDCI-Format0
  • a single common set of SRS parameters srs-ConfigApDCI-Format1a2b2c
  • the SRS request field is 1 bit [4] for DCI formats 0 / 1A / 2B / 2C / 2D, with a type 1 SRS triggered if the value of the SRS request field is set to '1'.
  • a 1-bit SRS request field shall be included in DCI formats 0 / 1A for frame structure type 1 and 0 / 1A / 2B / 2C / 2D for frame structure type 2 if the UE is configured with SRS parameters for DCI formats 0 / 1A / 2B / 2C / 2D by higher-layer signalling.
  • Table 2 below shows a SRS Request Value for trigger type 1 in DCI format 4 in 3GPP LTE / LTE-A system.
  • Table 3 is a table for further explaining the additional information related to the SRS transmission in the 3GPP LTE / LTE-A system.
  • the serving cell specific SRS transmission bandwidths C SRS are configured by higher layers.
  • the allowable values are given in subclause 5.5.3.2 of [3].
  • the serving cell specific SRS transmission sub-frames are configured by higher layers.
  • the allowable values are given in subclause 5.5.3.3 of [3].
  • SRS transmissions can occur in UpPTS and uplink subframes of the UL / DL configuration indicated by the higher layer parameter subframeAssignment for the serving cell.
  • a UE may be configured to transmit SRS on Np antenna ports of a serving cell where Np may be configured by higher layer signalling.
  • Np may be configured by higher layer signalling.
  • a UE configured for SRS transmission on multiple antenna ports of a serving cell shall transmit SRS for all the configured transmit antenna ports within one SC-FDMA symbol of the same subframe of the serving cell.
  • the SRS transmission bandwidth and starting physical resource block assignment are the same for all the configured antenna ports of a given serving cell.
  • a UE not configured with multiple TAGs shall not transmit SRS in a symbol whenever SRS and PUSCH transmissions happen to overlap in the same symbol.
  • TDD serving cell when one SC-FDMA symbol exists in UpPTS of the given serving cell, it can be used for SRS transmission.
  • both can be used for SRS transmission and for trigger type 0 SRS both can be assigned to the same UE.
  • a UE is not configured with multiple TAGs, or if a UE is configured with multiple TAGs and SRS and PUCCH format 2 / 2a / 2b happen to coincide in the same subframe in the same serving cell, -The UE shall not transmit type 0 triggered SRS whenever type 0 triggered SRS and PUCCH format 2 / 2a / 2b transmissions happen to coincide in the same subframe;
  • the UE shall not transmit type 1 triggered SRS whenever type 1 triggered SRS and PUCCH format 2a / 2b or format 2 with HARQ-ACK transmissions happen to coincide in the same subframe;
  • -The UE shall not transmit PUCCH format 2 without HARQ-ACK whenever type 1 triggered SRS and PUCCH format 2 without HARQ-ACK transmissions happen to coincide in the same subframe.
  • the UE shall transmit SRS whenever SRS transmission and PUCCH transmission carrying HARQ-ACK and / or positive SR using shortened format as defined in subclauses 5.4.1 and 5.4.2A of [3] happen to coincide in the same subframe if the parameter ackNackSRS-SimultaneousTransmission is TRUE.
  • a UE not configured with multiple TAGs shall not transmit SRS whenever SRS transmission on any serving cells and PUCCH transmission carrying HARQ-ACK and / or positive SR using normal PUCCH format as defined in subclauses 5.4.1 and 5.4.2A of [3] happen to coincide in the same subframe.
  • the UE shall not transmit SRS whenever SRS transmission instance overlaps with the PRACH region for preamble format 4 or exceeds the range of uplink system bandwidth configured in the serving cell.
  • the parameter ackNackSRS-Simultaneous Transmission provided by higher layers determines if a UE is configured to support the transmission of HARQ-ACK on PUCCH and
  • the cell specific SRS subframes of the primary cell UE shall transmit HARQ-ACK and SR using the shortened PUCCH format as defined in subclauses 5.4. 1 and 5.4.2A of [3], where the HARQ-ACK or the SR symbol corresponding to the SRS location is punctured.
  • This shortened PUCCH format shall be used in a cell specific SRS subframe of the primary cell even if the UE does not transmit SRS in that subframe.
  • the cell specific SRS subframes are defined in subclause 5.5.3.3 of [3].
  • the UE shall use the normal PUCCH format 1 / 1a / 1b as defined in subclause 5.4.1 of [3] or normal PUCCH format 3 as defined in subclause 5.4.2A of [3] for the transmission of HARQ-ACK and SR.Trigger type 0 SRS configuration of a UE in a serving cell for SRS periodicity, T SRS , and SRS subframe offset, T offset , is defined in Table 8.2-1 and Table 8.2-2, for FDD and TDD serving cell, respectively .
  • the periodicity T SRS of the SRS transmission is serving cell specific and is selected from the set ⁇ 2, 5, 10, 20, 40, 80, 160, 320 ⁇ ms or subframes.
  • T SRS For the SRS periodicity T SRS of 2 ms in TDD serving cell, two SRS resources are configured in a half frame containing UL subframe (s) of the given serving cell.
  • TDD serving cell For TDD serving cell, and a UE configured for type 0 triggered SRS transmission in serving cell c, and the UE configured with the parameter EIMTA-MainConfigServCell-r12 for serving cell c, if the UE does not detect an UL / DL configuration indication for radio frame m (as described in section 13.1), the UE shall not transmit trigger type 0 SRS in a subframe of radio frame m that is indicated by the parameter eimta-HarqReferenceConfig-r12 as a downlink subframe unless the UE transmits PUSCH in the same subframe.
  • Trigger type 1 SRS configuration of a UE in a serving cell for SRS periodicity, T SRS, 1 , and SRS subframe offset, T offset, 1 is defined in Table 8.2-4 and Table 8.2-5, for FDD and TDD serving cell, respectively.
  • the periodicity T SRS, 1 of the SRS transmission is serving cell specific and is selected from the set ⁇ 2, 5, 10 ⁇ ms or subframes.
  • a UE configured for type 1 triggered SRS transmission in serving cell c and not configured with a carrier indicator field shall transmit SRS on serving cell c upon detection of a positive SRS request in PDCCH / EPDCCH scheduling PUSCH / PDSCH on serving cell c
  • a UE configured for type 1 triggered SRS transmission in serving cell c and configured with a carrier indicator field shall transmit SRS on serving cell c upon detection of a positive SRS request in PDCCH / EPDCCH scheduling PUSCH / PDSCH with the value of carrier indicator field corresponding to serving cell c .
  • a UE configured for type 1 triggered SRS transmission is not expected to receive type 1 SRS triggering events associated with different values of trigger type 1 SRS transmission parameters, as configured by higher layer signaling, for the same subframe and the same serving cell.
  • the UE shall not transmit SRS in a subframe of a radio frame that is indicated by the corresponding eIMTA-UL / DL-con
  • Table 4 shows a subframe offset configuration (T offset) and UE-specific SRS periodicity (T SRS ) for trigger type 0 in FDD.
  • Table 5 below shows subframe offset configuration (T offset) and UE-specific SRS periodicity (T SRS ) for trigger type 0 in TDD.
  • SRS Configuration Index I SRS SRS Periodicity (ms) SRS Subframe Offset 0 2 0, 1 One 2 0, 2 2 2 1, 2 3 2 0, 3 4 2 1, 3 5 2 0, 4 6 2 1, 4 7 2 2, 3 8 2 2, 4 9 2 3, 4 10-14 5 I SRS -10 15-24 10 I SRS -15 25-44 20 I SRS -25 45-84 40 I SRS -45 85-164 80 I SRS -85 165-324 160 I SRS -165 325-644 320 I SRS -325 645-1023 reserved reserved reserved
  • Table 7 shows k SRS for TDD.
  • Table 8 shows a subframe offset configuration (T offset, 1 ) and UE-specific SRS periodicity (T SRS, 1 ) for trigger type 1 in FDD.
  • Table 9 shows a subframe offset configuration (T offset, 1 ) and UE-specific SRS periodicity (T SRS, 1 ) for trigger type 1 in TDD.
  • Table 10 shows additional channel change characteristics (blockage effect) compared to less than 6Ghz channel of more than 6Ghz channel.
  • FIG. 2 is a diagram for describing a blocakage duration in relation to Table 10.
  • FIG. 2A illustrates a time when a series of blockage event duration in Table 10 generates meaningful blockage (i.e., blockage causing attenuation below a specific power threshold), and
  • FIG. 2B illustrates blockage duration (Table 2) in FIG. t D ).
  • the Series of Blockage event represents the time when a meaningful blockage occurs
  • t D represents the time when the blockage occurs and the blockage ends again and returns to the normal state.
  • Table 11 is a table for showing the pattern relationship between t decay , t rising and the terminal.
  • the blockage change in Table 11 is basically about 100 ms (walking obstacle speed (4 km / h)), but this may vary from 2 to several hundred ms, depending on the pattern of the terminal and the surrounding environment.
  • the wide beam can be defined when the multi-beams are properly positioned.
  • a transmitter transmits a synchronization signal using the wide beam. That is, it is assumed that all sub-arrays transmit identical Primary Synchronization Signals (PSS) / Secondary Synchronization Signals (SSS) / Physical Broadcast CHannel (PBCH).
  • PSS Primary Synchronization Signals
  • SSS Secondary Synchronization Signals
  • PBCH Physical Broadcast CHannel
  • the beam gain becomes small.
  • additional power gain can be provided through repeated transmissions on the time axis.
  • the synchronization subframe structure based on such repeated transmission may be represented as shown in FIG. 4.
  • FIG. 4 is a diagram illustrating an example of a structure of a synchronization subframe.
  • a block having the same hatching shape refers to an orthogonal frequency division multiplexing (OFDM) symbol group to which the same RF beam group (defined using four subarray beams) is applied. That is, four OFDM symbols use the same multi-RF beam.
  • the beam scanning section may be configured as shown in FIG. 4 in a general form in New RAT with reference to the structure of FIG. 4.
  • FIG. 5 is a diagram illustrating a beam scanning period and a resource area (for example, 5 ⁇ N ms periods).
  • the beam scanning procedure itself has a lot of processing overhead, it is not possible to shorten the beam scanning in extreme periods.
  • the temporal change of the channel above 6GHz is likely to change faster than the existing channel below 6GHz due to the aforementioned additional channel elements.
  • the BS beam configuration may be fixed, but the beam of the UE may be changed according to the location of the serving cell, the change of the surrounding environment, the UE behavior pattern, and the like. That is, the Tx / Rx beam mismatch is likely to occur within the beam scanning interval. Therefore, a beam tracking technique is needed to overcome this.
  • the received signal strength (Rx beam) of the terminal is applied to each BRS by using the BRS illustrated in FIG. 4 (hereinafter, referred to as RSRP (Reference Signal Received Power)). It can be done by measuring. If the reciprocity of the Tx / Rx beam pair for downlink (ie, base station transmit beam / terminal receive beam pair and terminal transmit beam / base station receive beam) is established, The obtained transmit / receive beam pair can be applied to uplink. However, if not, the uplink case may use SRS. If the most reliable uplink beam tracking is desired, the SRS corresponding to the entire transmission beam ID of each UE should be transmitted. This means that a physical uplink shared channel (PUSCH) transmission interval becomes smaller according to SRS transmission, and impairs uplink throughput performance.
  • PUSCH physical uplink shared channel
  • terminal transmission beam ID number 8
  • the SRS transmission area may increase.
  • various embodiments according to the present invention will be described.
  • the terminal For Tx beam tracking of the terminal, the terminal needs to transmit an SRS according to each candidate terminal transmission beam. Since SRS transmission according to many beam directions (terminal transmission beam set in all directions) generates a lot of resource loss, the present invention flexibly transmits SRS transmission according to a terminal change pattern in order to perform adaptive terminal transmission beam tracking. I would like to suggest a method.
  • Embodiment 1 UE-specific SRS period setting for transmission beam tracking of UE and UE-specific SRS transmission method corresponding thereto
  • Embodiment 1 As a sub-embodiment of Embodiment 1, a method for setting a UE-specific SRS transmission period and an SRS transmission subframe for adaptive Tx beam tracking is proposed.
  • Embodiment 1-1 UE-Specific SRS Transmission Period and SRS Transmission Subframe Configuration
  • FIG. 7 is a diagram illustrating measured RSRP change of each downlink terminal.
  • UE-specific SRS transmission cycle Let's define 7 shows the RSRP change of the i-th terminal with a significant RSRP change, and the figure shown to the right of FIG. 7 shows the RSRP change of the j-th terminal with no large RSRP change.
  • the base station may collectively set the terminal to higher layer signaling or the terminal may be set for each terminal.
  • Table 12 is a table illustrating the SRS configuration and SRS period.
  • the terminal-specific SRS configuration Index (I SRS ) can be set by the following equation (2) to indicate the T SRS . That is, the terminal specific SRS configuration Index (I SRS ) is And Based on the value, it may be determined as in Equation 2 below.
  • Equation 2 Increasing
  • I SRS is 2 in Equation 2
  • the T SRS exemplifies setting the SRS transmission period to 1 ms with reference to Table 12.
  • I SRS in a subframe overlapped for SRS transmission is as follows ( ).
  • U indicates a set of UEs in which SRS transmission is configured in the subframe (when SRS transmission is performed in corresponding subframes of total U UEs).
  • a subframe configuration for SRS transmission may be expressed as Equation 3 by modifying the SRS transmission subframe configuration of 3GPP TS 36.213.
  • n f is a system frame number.
  • K SRS ⁇ 0,1, ...., 9 ⁇ .
  • T offset indicates an SRS subframe offset value, and T SRS indicates a physical transmission period of the SRS.
  • the SRS transmission subframe has been determined using the T SRS value, but in Equation 3, the SRS transmission subframe is determined by the M SRS index value.
  • Embodiment 1-2 UE-Specific SRS Transmission Method for Adaptive Transmission Beam Tracking
  • each terminal can determine the SRS configuration index I SRS by measuring the RSRP change according to the above-described embodiment 1-1, and the SRS transmission period corresponding to the determined I SRS (T SRS for the UE of index i) may be set.
  • each terminal may transmit the index M SRS corresponding to the uplink SRS transmission period and the terminal transmission beam tracking candidate set index to the base station through PUSCH or PUCCH (Physical Uplink Control CHannel).
  • PUSCH Physical Uplink Control CHannel
  • the terminal transmit beam tracking candidate set index value may be configured as an offset value of the transmit beam ID of the terminal or the receive beam ID of the terminal obtained through beam scanning.
  • the absolute offset ID position may be set in the upper layer. If the SRS transmission period is short, the position of the optimal terminal transmission beam that changes according to the channel change is likely to be near the previous optimal beam position. Therefore, the candidate set of the following Table 13 is set to a set of neighboring beams of the current terminal transmission beam.
  • Table 13 shows a terminal transmission beam candidate subset corresponding to the terminal transmission beam ID candidate offset index.
  • Table 13 may be shared by the base station and the terminal by a method such as higher layer signaling.
  • the terminal transmission beam ID offset set may set the terminal transmission beam tracking candidate set index as shown in Table 13 based on the position of the candidate offset of the terminal transmission beam of FIG. 8. Table 13 above shows only an example based on a 3-bit feedback and is extensible.
  • the terminal transmission beam ID candidate offset index or the terminal transmission beam candidate index I beam_offset may be generally expressed as a function of T SRS or M SRS , and special candidate terminal beams (for example, vertical beam tracking or horizontal beam tracking, etc.). ) May also include a configuration for the determination of V / H polarization).
  • I beam_offset is 2.
  • the terminal transmission beam candidate set is a set of vertical beams.
  • each terminal may transmit the number of SRSs corresponding to the value of I beam_offset .
  • the terminal transmission beam candidate subset corresponding to the terminal transmission beam ID candidate offset index 1 has a terminal transmission beam ID of 0, 1, Since it is configured as 2, the specific terminal can transmit three SRS corresponding to the corresponding terminal transmit beam IDs.
  • the physical beam direction of the terminal is in I beam_offset Move in order of beam direction.
  • the base station may be set so that the SRS resource position of each terminal does not overlap.
  • the SRS may transmit as shown in FIG. 9.
  • FIG. 9 is a diagram illustrating an SRS transmission method according to a terminal transmission beam candidate index.
  • the base station may set a corresponding SRS transmission resource for each terminal transmission beam ID.
  • SRS 0 for the terminal transmission beam ID 0, SRS 3 for the terminal transmission beam ID 3, and SRS 4 for the terminal transmission beam ID 4 may be configured as an SRS transmission resource.
  • SRS 0, SRS 3 and SRS 4 may be transmitted in different symbols, respectively.
  • the base station measures an SRS corresponding to each T SRS and offsets an optimal transmit beam ID of each terminal. (optimum transmission beam ID offset of the i-th terminal) can be predicted and the optimal uplink resource allocation position is identified by measuring the SRS of the entire band of the terminal. And uplink resource allocation location to the UE through a control channel (for example, Physical Downlink Control CHannel (PDCCH)) or a data channel (for example, PDSCH (Physical Downlink Shared CHannel)).
  • a control channel for example, Physical Downlink Control CHannel (PDCCH)
  • PDSCH Physical Downlink Shared CHannel
  • step 6 the transmission physical beam ID of the terminal is It is changed to the beam ID corresponding to.
  • the UE-specific SRS transmission method for adaptive transmission beam tracking described above can be briefly summarized with reference to FIG. 10.
  • FIG. 10 is a diagram illustrating a flowchart for UE-specific periodic SRS transmission proposed in the present invention.
  • the terminal and the base station may determine the base station transmit beam / terminal receive beam pair through beam scanning.
  • the terminal may measure the RSRP and determine the SRS transmission period based on the measured RSRP change value.
  • the terminal may transmit the M SRS and the selected terminal transmit beam candidate set index to the base station through the PUCCH or the PUSCH.
  • the terminal may transmit an SRS corresponding to the selected terminal transmission beam candidate set index I beam_offset to the base station.
  • the base station is the best terminal transmit beam ID And uplink resource allocation information for SRS transmission may be informed to the UE through PDCCH or PDSCH.
  • UE is optimal terminal transmit beam ID Uplink transmission may be started based on the terminal transmission beam and the base station reception beam pair corresponding to each other.
  • the present invention provides efficient uplink communication by presenting an efficient resource allocation of SRS for tracking UE transmit beam in base station receive beam and UE transmit beam pair and adaptive beam tracking according to the behavior pattern of each UE. It becomes possible.
  • each component or feature is to be considered optional unless stated otherwise.
  • Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention.
  • the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.
  • a method for transmitting an SRS in a wireless communication system and a terminal for the same can be industrially used in various wireless communication systems such as 3GPP LTE / LTE-A system and 5G communication system.

Landscapes

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

Abstract

Un procédé de transmission d'un SRS par un équipement d'utilisateur dans un système de communication sans fil peut comprendre les étapes consistant à : mesurer une valeur de variation d'intensité de signal reçu durant une période de temps prédéterminée, de sorte à déterminer un indice de configuration de SRS ; déterminer, sur la base d'informations de configuration de SRS prédéfinies, des informations d'indice relatives à une période de transmission de SRS et des informations d'indice d'ensemble de faisceaux de transmission candidats prédéterminées de l'équipement d'utilisateur, qui correspondent à l'indice de configuration de SRS déterminé ; transmettre, à une station de base, les informations d'indice relatives à la période de transmission de SRS et les informations d'indice d'ensemble de faisceaux de transmission candidats prédéterminées ; et transmettre le SRS à la station de base sur la base d'au moins un élément d'informations d'identification (ID) de faisceaux de transmission candidats correspondant aux informations d'indice d'ensemble de faisceaux candidats de transmission prédéterminées.
PCT/KR2016/011192 2016-04-21 2016-10-06 Procédé de transmission de srs dans un système de communication sans fil, et équipement d'utilisateur associé Ceased WO2017183779A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201662325465P 2016-04-21 2016-04-21
US62/325,465 2016-04-21

Publications (1)

Publication Number Publication Date
WO2017183779A1 true WO2017183779A1 (fr) 2017-10-26

Family

ID=60116119

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2016/011192 Ceased WO2017183779A1 (fr) 2016-04-21 2016-10-06 Procédé de transmission de srs dans un système de communication sans fil, et équipement d'utilisateur associé

Country Status (1)

Country Link
WO (1) WO2017183779A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025066851A1 (fr) * 2023-09-25 2025-04-03 华为技术有限公司 Procédé et appareil de transmission de signal de référence de sondage

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100042210A (ko) * 2008-10-15 2010-04-23 엘지전자 주식회사 복수개의 안테나를 이용한 사운딩 기준 신호 시퀀스 전송 방법
KR101441500B1 (ko) * 2008-06-20 2014-11-04 삼성전자주식회사 다중 안테나 및 사운딩 레퍼런스 신호 호핑을 사용하는상향링크 무선 통신 시스템에서의 사운딩 레퍼런스 신호전송 장치 및 방법
WO2014185841A1 (fr) * 2013-05-16 2014-11-20 Telefonaktiebolaget L M Ericsson (Publ) Equipement utilisateur et procede pour emettre des signaux de reference de sondage
KR20150080523A (ko) * 2012-10-24 2015-07-09 퀄컴 인코포레이티드 Lte-a에서의 mimo 동작을 위한 향상된 srs 송신
KR20150097939A (ko) * 2014-02-19 2015-08-27 삼성전자주식회사 우선 순위를 갖는 송신 빔 인덱스 선택 및 할당 방법 및 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101441500B1 (ko) * 2008-06-20 2014-11-04 삼성전자주식회사 다중 안테나 및 사운딩 레퍼런스 신호 호핑을 사용하는상향링크 무선 통신 시스템에서의 사운딩 레퍼런스 신호전송 장치 및 방법
KR20100042210A (ko) * 2008-10-15 2010-04-23 엘지전자 주식회사 복수개의 안테나를 이용한 사운딩 기준 신호 시퀀스 전송 방법
KR20150080523A (ko) * 2012-10-24 2015-07-09 퀄컴 인코포레이티드 Lte-a에서의 mimo 동작을 위한 향상된 srs 송신
WO2014185841A1 (fr) * 2013-05-16 2014-11-20 Telefonaktiebolaget L M Ericsson (Publ) Equipement utilisateur et procede pour emettre des signaux de reference de sondage
KR20150097939A (ko) * 2014-02-19 2015-08-27 삼성전자주식회사 우선 순위를 갖는 송신 빔 인덱스 선택 및 할당 방법 및 장치

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2025066851A1 (fr) * 2023-09-25 2025-04-03 华为技术有限公司 Procédé et appareil de transmission de signal de référence de sondage

Similar Documents

Publication Publication Date Title
WO2018066727A1 (fr) Procédé pour transmettre un srs dans un système de communication sans fil, et terminal associé
WO2018062898A1 (fr) Procédé et appareil de sélection de ressource et de transmission de pssch dans un système de communication sans fil
WO2017048101A1 (fr) Procédé et appareil de transmission/réception de messages d'un terminal v2v dans un système de communications sans fil
WO2018151554A1 (fr) Procédé de réception d'informations de configuration srs et terminal associé
WO2018062846A1 (fr) Procédé et dispositif de sélection de ressource et de transmission de pssch dans un système de communication sans fil
WO2019107969A1 (fr) Procédé et appareil pour mesurer une qualité de signal dans un système de communication sans fil
WO2018147699A1 (fr) Procédé par lequel un terminal d2d forme une liaison de communication avec un dispositif de communication dans un système de communication sans fil, et appareil associé
WO2016159715A2 (fr) Procédé et dispositif d'émission et de réception, à l'aide d'un terminal v2x, d'un signal dans un système de communication sans fil
WO2018021825A1 (fr) Procédé d'émission de signal de liaison montante et équipement utilisateur, et procédé de réception de signal de liaison montante et station de base
WO2016171495A1 (fr) Procédé et appareil de sélection de relais par terminal de communication de dispositif à dispositif, d'émission ou de réception de signal dans un système de communication sans fil
WO2018203738A1 (fr) Procédé de commande de puissance d'un signal de liaison latérale par un équipement utilisateur relais dans un système de communication sans fil et appareil associé
WO2019004784A1 (fr) Procédé d'exécution de mesure et équipement utilisateur, et procédé de configuration de mesure et station de base
WO2019031952A1 (fr) Procédé et dispositif pour qu'un terminal v2x reçoive des informations de planification de canal pscch et transmette un canal pscch dans un système de communication sans fil
WO2018131934A1 (fr) Procédé et appareil pour effectuer une recherche de faisceau ou une transmission de faisceau sur la base d'informations d'erreur de localisation dans un système de communication sans fil
WO2018155734A1 (fr) Procédé de commande d'interférence intercellulaire due à une transmission srs dans un système de communication sans fil et dispositif associé
WO2016032305A1 (fr) Procede et appareil pour traiter des configurations de signal de reference d'informations d'etat de canal a puissance nulle pour des signaux de decouverte dans un systeme de communication sans fil
WO2018143725A1 (fr) Procédé par lequel un terminal mesure un taux d'occupation de canal (cr) et effectue une transmission dans un système de communication sans fil, et dispositif
WO2018174684A1 (fr) Procédé et appareil pour transmettre un signal de liaison latérale dans un système de communication sans fil
WO2018131927A1 (fr) Procédé et appareil pour réaliser une communication de relais sur la base d'informations de compteur dans un système de communication sans fil
WO2019031919A1 (fr) Procédé et dispositif d'émission ou de réception d'un signal dans un système de communication sans fil
WO2018131933A1 (fr) Procédé et appareil permettant de transmettre une attribution de planification (sa) et des données associées à une régulation de congestion dans un système de communication sans fil
WO2018084331A1 (fr) Procédé de transmission d'une demande de connexion rrc, et terminal associé
WO2017034265A1 (fr) Procédé et dispositif d'émission/réception de signal de terminal v2x dans un système de communication sans fil
WO2018038496A1 (fr) Procédé et dispositif de transmission de données et de sélection de ressources au moyen d'une mesure de terminal dans un système de communication sans fil
WO2018135913A1 (fr) Procédé et dispositif de réalisation d'une communication d2d de relais dans un système de communication sans fil

Legal Events

Date Code Title Description
NENP Non-entry into the national phase

Ref country code: DE

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 16899547

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 16899547

Country of ref document: EP

Kind code of ref document: A1