WO2017052260A1 - Procédé d'émission et de réception d'un signal à partir d'une sous-trame spéciale et appareil pour ledit procédé - Google Patents

Procédé d'émission et de réception d'un signal à partir d'une sous-trame spéciale et appareil pour ledit procédé Download PDF

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WO2017052260A1
WO2017052260A1 PCT/KR2016/010645 KR2016010645W WO2017052260A1 WO 2017052260 A1 WO2017052260 A1 WO 2017052260A1 KR 2016010645 W KR2016010645 W KR 2016010645W WO 2017052260 A1 WO2017052260 A1 WO 2017052260A1
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special subframe
srs
reference signal
uppts
configuration
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PCT/KR2016/010645
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English (en)
Korean (ko)
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김영태
김기준
양석철
박종현
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엘지전자 주식회사
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex

Definitions

  • the present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving signals in a special subframe.
  • the special subframe may receive a downlink signal and transmit an uplink signal in one subframe. Therefore, in order to prevent the transmission of the signal and the reception of the signal overlap, a guard period is positioned between the downlink reception period and the uplink transmission period.
  • An object of the present invention is to provide a method for transmitting and receiving a signal in a special subframe and an apparatus therefor.
  • the method includes receiving information bits for a first special subframe configuration and an extended reference signal indicating a configuration of a special subframe from a base station.
  • the reference signal may be transmitted on an UpPTS indicated by the first special subframe configuration, and the extended reference signal may be transmitted on at least one symbol before the UpPTS indicated by the first special subframe configuration.
  • the UpPTS indicated by the second special subframe configuration may additionally include one symbol before the UpPTS indicated by the first special subframe configuration.
  • the DwPTS indicated by the second special subframe configuration has a length shorter by one symbol than the DwPTS indicated by the first special subframe configuration.
  • the first special subframe configuration may be a Long Term Evolution (LTE) Time Division Duplex (TDD) special subframe configuration.
  • LTE Long Term Evolution
  • TDD Time Division Duplex
  • the second special subframe configuration may be a different LTE TDD special subframe configuration than the first special subframe.
  • the second special subframe configuration may be a special subframe configuration different from the LTE TDD special subframe configuration.
  • the reference signal is a sounding reference signal (SRS)
  • the extended reference signal is an extended SRS.
  • the transceiver configured to transmit and receive wireless signals; And a processor configured to control the transceiver, wherein the processor receives, from a base station, information bits for a first special subframe configuration and extended reference signal indicating configuration of a special subframe, and wherein the information bits are first. Has a value, and transmits a reference signal according to the first special subframe setting within the special subframe, and when the information bit has a second value, the first special subframe within the special subframe.
  • the reference subframe is further configured to transmit the reference signal and the extended reference signal according to the mapped second special subframe configuration, wherein the special subframe includes a downlink pilot time slot (DwPTS), a guard period (GP), and an upPTS ( Uplink pilot time slot), and the reference signal is indicated by the first special subframe configuration.
  • DwPTS downlink pilot time slot
  • GP guard period
  • upPTS Uplink pilot time slot
  • FIG. 1 illustrates a system structure of an LTE system that is an example of a wireless communication system.
  • 3 shows a user plane of a wireless protocol.
  • FIG. 4 is a diagram illustrating a structure of a type 1 radio frame.
  • 5 is a diagram illustrating a structure of a type 2 radio frame.
  • FIG. 6 is a diagram illustrating a resource grid in a downlink slot.
  • FIG. 7 illustrates a structure of a downlink subframe.
  • FIG. 8 is a diagram illustrating a structure of an uplink subframe.
  • 9A and 9B show an exemplary structure of a multiple antenna system.
  • 10A and 10B show examples of a typical CDD structure in a multiple antenna system.
  • AAS active antenna system
  • FIG. 12 illustrates a structure of a downlink reference signal for a normal CP in an LTE system supporting downlink transmission using four antennas.
  • FIG. 13 is a diagram illustrating a structure of a downlink reference signal for an extended CP in an LTE system supporting downlink transmission using four antennas.
  • 15 is an example of an aperiodic CSI-RS transmission scheme.
  • 16 is a flowchart of a method of transmitting a reference signal in a special subframe according to an embodiment.
  • 17 is a schematic diagram of devices according to an embodiment of the present invention.
  • each component or feature may be considered to be optional unless otherwise stated.
  • Each component or feature may be embodied in a form that is not combined with other components or features.
  • some components and / or features may be combined to form an embodiment of the present 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.
  • a 'base station (BS)' may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point (AP), and the like.
  • the repeater may be replaced by terms such as relay node (RN) and relay station (RS).
  • the term “terminal” may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), a subscriber station (SS), and the like.
  • Embodiments of the present invention may be supported by standard documents disclosed in at least one of the wireless access systems IEEE 802 system, 3GPP system, 3GPP LTE and LTE-Advanced (LTE-A) system and 3GPP2 system. That is, steps or parts which are not described to clearly reveal the technical spirit of the present invention among the embodiments of the present invention may be supported by the above documents. In addition, all terms disclosed in the present document can be described by the above standard document.
  • 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) is part of an Evolved UMTS (E-UMTS) using E-UTRA, and employs OFDMA in downlink and SC-FDMA in uplink.
  • LTE-A Advanced
  • WiMAX can be described by the IEEE 802.16e standard (WirelessMAN-OFDMA Reference System) and the advanced IEEE 802.16m standard (WirelessMAN-OFDMA Advanced system). For clarity, the following description focuses on 3GPP LTE and 3GPP LTE-A systems, but the technical spirit of the present invention is not limited thereto.
  • the LTE system is a mobile communication system evolved from the UMTS system.
  • the LTE system structure can be broadly classified into an Evolved UMTS Terrestrial Radio Access Network (E-UTRAN) and an Evolved Packet Core (EPC).
  • E-UTRAN is composed of a UE (User Equipment, UE) and an eNB (Evolved NodeB, eNB), and is called a Uu interface between the UE and the eNB, and an X2 interface between the eNB and the eNB.
  • UE User Equipment
  • eNB evolved NodeB
  • the EPC consists of a Mobility Management Entity (MME) that handles the control plane and a Serving Gateway (S-GW) that handles the user plane.
  • MME Mobility Management Entity
  • S-GW Serving Gateway
  • the S1-MME interface is used between the eNB and the MME.
  • the eNB and the S-GW are called S1-U interfaces, and they are collectively called S1 interfaces.
  • the radio interface protocol (Radio Interface Protocol) is defined in the Uu interface, which is a radio section, and consists of a physical layer, a data link layer, and a network layer horizontally. Is divided into a user plane for user data transmission and a control plane for signaling (control signal) transmission.
  • This air interface protocol is based on the lower three layers of the Open System Interconnection (OSI) reference model, which is widely known in communication systems.
  • OSI Open System Interconnection
  • L2 Layer 2
  • MAC Medium Access Control
  • RLC Radio Link Control
  • PDCP Packet Data Convergence Protocol
  • RRC Radio Resource Control
  • FIG. 2 is a diagram illustrating a control plane of a radio protocol
  • FIG. 3 is a diagram illustrating a user plane of a radio protocol.
  • a physical layer (PHY) layer which is a first layer, provides an information transfer service to a higher layer by using a physical channel.
  • the PHY layer is connected to the upper Medium Access Control (MAC) layer through a transport channel, and data between the MAC layer and the PHY layer moves through this transport channel.
  • the transport channel is largely divided into a dedicated transport channel and a common transport channel according to whether the channel is shared. Then, data is transferred between different PHY layers, that is, between PHY layers of a transmitting side and a receiving side through a physical channel using radio resources.
  • the media access control (MAC) layer serves to map various logical channels to various transport channels, and also plays a role of logical channel multiplexing to map multiple logical channels to one transport channel.
  • the MAC layer is connected to a Radio Link Control (RLC) layer, which is a higher layer, by a logical channel, and the logical channel is a control channel that transmits information on the control plane according to the type of information to be transmitted. It is divided into (Control Channel) and Traffic Channel that transmits user plane information.
  • RLC Radio Link Control
  • the RLC layer of the second layer performs segmentation and concatenation of data received from the upper layer to adjust the data size so that the lower layer is suitable for transmitting data in a wireless section.
  • the AM RLC performs a retransmission function through an Automatic Repeat and Request (ARQ) function for reliable data transmission.
  • ARQ Automatic Repeat and Request
  • the Packet Data Convergence Protocol (PDCP) layer of the second layer is an IP containing relatively large and unnecessary control information for efficient transmission in a low bandwidth wireless section when transmitting IP packets such as IPv4 or IPv6. Performs Header Compression which reduces the packet header size. This transmits only the necessary information in the header portion of the data, thereby increasing the transmission efficiency of the radio section.
  • the PDCP layer also performs a security function, which is composed of encryption (Ciphering) to prevent third-party data interception and integrity protection (Integrity protection) to prevent third-party data manipulation.
  • the radio resource control (RRC) layer located at the top of the third layer is defined only in the control plane, and the configuration, re-configuration, and release of radio bearers (RBs) are performed. It is responsible for controlling logical channels, transport channels and physical channels.
  • the radio bearer (RB) refers to a logical path provided by the first and second layers of the radio protocol for data transmission between the terminal and the UTRAN, and in general, the establishment of the RB means a radio protocol required to provide a specific service.
  • RB is divided into SRB (Signaling RB) and DRB (Data RB). SRB is used as a channel for transmitting RRC messages in the control plane, and DRB is used as a channel for transmitting user data in the user plane.
  • a structure of a downlink radio frame will be described with reference to FIGS. 4 and 5.
  • uplink / downlink data packet transmission is performed in subframe units, and one subframe is defined as a predetermined time interval including a plurality of OFDM symbols.
  • the 3GPP LTE standard supports a type 1 radio frame structure applicable to frequency division duplex (FDD) and a type 2 radio frame structure applicable to time division duplex (TDD).
  • the downlink radio frame consists of 10 subframes, and one subframe consists of two slots in the time domain.
  • the time taken for one subframe to be transmitted is called a transmission time interval (TTI).
  • TTI transmission time interval
  • one subframe may have a length of 1 ms and one slot may have a length of 0.5 ms.
  • One slot includes a plurality of OFDM symbols in the time domain and includes a plurality of resource blocks (RBs) in the frequency domain.
  • RBs resource blocks
  • the resource block (RB) is a resource allocation unit and may include a plurality of consecutive subcarriers in one slot.
  • Type 2 radio frames consist of two half frames, each of which has five subframes, a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS).
  • DwPTS downlink pilot time slot
  • GP guard period
  • UpPTS uplink pilot time slot
  • One subframe consists of two slots.
  • DwPTS is used for initial cell search, synchronization or channel estimation at the terminal.
  • UpPTS is used for channel estimation at the base station and synchronization of uplink transmission of the terminal.
  • the guard period is a period for removing interference generated in the uplink due to the multipath delay of the downlink signal between the uplink and the downlink.
  • one subframe consists of two slots regardless of the radio frame type.
  • the structure of the radio frame is only an example, and the number of subframes included in the radio frame or the number of slots included in the subframe and the number of symbols included in the slot may be variously changed.
  • One downlink slot includes seven OFDM symbols in the time domain, and one resource block (RB) is shown to include twelve subcarriers in the frequency domain, but the present invention is not limited thereto.
  • one slot includes seven OFDM symbols in the case of a general cyclic prefix (CP), but one slot may include six OFDM symbols in the case of an extended-CP (CP).
  • CP general cyclic prefix
  • Each element on the resource grid is called a resource element.
  • One resource block includes 12x7 resource elements.
  • the number of NDLs of resource blocks included in a downlink slot depends on a downlink transmission bandwidth.
  • the structure of the uplink slot may be the same as the structure of the downlink slot.
  • the downlink control channels used in the 3GPP LTE system include, for example, a physical control format indicator channel (PCFICH), a physical downlink control channel (PDCCH), and a physical HARQ indicator channel.
  • PCFICH Physical Control format indicator channel
  • PDCH physical downlink control channel
  • HARQ indicator channel Physical HARQ indicator channel
  • the PHICH includes a HARQ Acknowledgment (ACK) / NACK (Negative ACK) signal as a response to uplink transmission.
  • Control information transmitted through the PDCCH is referred to as downlink control information (DCI).
  • DCI includes uplink or downlink scheduling information or an uplink transmit power control command for a certain terminal group.
  • the PDCCH includes a resource allocation and transmission format of a DL shared channel (DL-SCH), resource allocation information of an uplink shared channel (UL-SCH), paging information of a paging channel (PCH), system information on a DL-SCH, and PD- Resource allocation of upper layer control messages, such as random access responses transmitted on the SCH, sets of transmit power control commands for individual terminals in any terminal group, transmit power control information, Voice over IP (VoIP) Activation may be included.
  • a plurality of PDCCHs may be transmitted in the control region.
  • the terminal may monitor the plurality of PDCCHs.
  • the PDCCH is transmitted in an aggregation of one or more consecutive control channel elements (CCEs).
  • CCEs control channel elements
  • the CCE is a logical allocation unit used to provide a PDCCH with a coding rate based on the state of a radio channel.
  • the CCE corresponds to a plurality of resource element groups.
  • the PDCCH format and the number of available bits are determined according to the correlation between the number of CCEs and the coding rate provided by the CCEs.
  • the base station determines the PDCCH format according to the DCI transmitted to the terminal, and adds a cyclic redundancy check (CRC) to the control information.
  • the CRC is masked with an identifier called Radio Network Temporary Identifier (RNTI) according to the owner or purpose of the PDCCH.
  • RNTI Radio Network Temporary Identifier
  • the cell-RNTI (C-RNTI) identifier of the terminal may be masked to the CRC.
  • a paging indicator identifier eg, Paging-RNTI (P-RNTI)
  • P-RNTI Paging-RNTI
  • the PDCCH is for system information (more specifically, System Information Block (SIB))
  • SIB System Information Block
  • SI-RNTI system information RNTI
  • RA-RNTI Random Access-RNTI
  • RA-RNTI may be masked to the CRC to indicate a random access response that is a response to transmission of a random access preamble of the terminal.
  • the uplink subframe may be divided into a control region and a data region in the frequency domain.
  • a physical uplink control channel (PUCCH) including uplink control information is allocated to the control region.
  • a physical uplink shared channel (PUSCH) including user data is allocated to the data area.
  • PUCCH physical uplink control channel
  • PUSCH physical uplink shared channel
  • one UE does not simultaneously transmit a PUCCH and a PUSCH.
  • PUCCH for one UE is allocated to an RB pair in a subframe. Resource blocks belonging to a resource block pair occupy different subcarriers for two slots. This is called a resource block pair allocated to the PUCCH is frequency-hopped at the slot boundary.
  • Multi-antenna technology is a next-generation mobile communication technology that can be widely used in mobile communication terminals and repeaters because it can improve the data transmission speed in a specific range or increase the system range for a specific data transmission speed. It is attracting attention as the next generation technology that can overcome the traffic limit of mobile communication which reached the limit situation.
  • FIG. 9A is a configuration diagram of a general multiple antenna (MIMO) communication system.
  • MIMO general multiple antenna
  • the research trends related to multi-antennas to date include information theory aspects related to calculation of multi-antenna communication capacity in various channel environments and multi-access environments, wireless channel measurement and model derivation of multi-antenna systems, and transmission reliability and transmission rate improvement.
  • Active research is being conducted from various viewpoints, such as the study of space-time signal processing technology.
  • the communication method in the multi-antenna system in a more specific manner, it can be represented as follows mathematically. It is assumed that there are N T transmit antennas and N R receive antennas as shown in FIG. 9A. First, referring to the transmission signal, when there are N T transmit antennas, since the maximum transmittable information is N T , the transmission information may be represented by a vector shown in Equation 2 below.
  • each transmission information Can have different transmit powers.
  • the transmission information of which transmission power is adjusted is represented by a vector as shown in Equation 3 below.
  • Receive signal of each antenna when there are N R receiving antennas When expressed as a vector is as shown in Equation 6 below.
  • channels may be classified according to transmit / receive antenna indexes, and a channel passing through the receive antenna i from the transmit antenna j will be denoted as h ij .
  • h ij a channel passing through the receive antenna i from the transmit antenna j.
  • the order of the index of h ij is that the reception antenna index is first, and the index of the transmission antenna is later.
  • 9B is a diagram illustrating a channel from N T transmit antennas to receive antenna i.
  • a channel arriving from the N T transmit antennas to the reception antenna i may be expressed as follows.
  • Equation 7 Equation 8
  • the real channel is added with Additive White Gaussian Noise (AWGN) after passing through the channel matrix H as described above, so that the white noise added to each of the R reception antennas is added.
  • AWGN Additive White Gaussian Noise
  • Equation 10 The received signal obtained using the above equations is shown in Equation 10 below.
  • the number of rows and columns of the channel matrix H representing the channel condition is determined by the number of transmit antennas and receive antennas.
  • the number of rows in the channel matrix H is equal to the number of receive antennas N R
  • the number of columns is equal to the number of transmit antennas N T. That is, the channel matrix H may be represented by an N R ⁇ N T matrix.
  • the rank of a matrix is defined by the smaller of the number of rows and columns independent of each other. Therefore, the rank of the matrix cannot have a value larger than the number of rows or columns of the matrix.
  • the rank of the channel matrix H can be represented by the following equation (11).
  • Multiple antenna transmit / receive schemes used for the operation of multiple antenna systems include frequency switched transmit diversity (FST), Space Frequency Block Code (SFBC), Space Time Block Code (STBC), and Cyclic Delay Diversity (CDD).
  • FST frequency switched transmit diversity
  • SFBC Space Frequency Block Code
  • STBC Space Time Block Code
  • CDD Cyclic Delay Diversity
  • TSTD time switched transmit diversity
  • SM spatial multiplexing
  • GCDD Generalized Cyclic Delay Diversity
  • S-VAP Selective Virtual Antenna Permutation
  • FSTD is a method of obtaining diversity gain by allocating subcarriers having different frequencies for each signal transmitted to each of the multiple antennas.
  • SFBC is a technique that efficiently applies selectivity in the spatial domain and frequency domain to secure both diversity gain and multi-user scheduling gain in the corresponding dimension.
  • STBC is a technique for applying selectivity in the space domain and the time domain.
  • CDD is a technique of obtaining diversity gain by using path delay between transmission antennas.
  • TSTD is a technique of time-dividing a signal transmitted through multiple antennas.
  • Spatial multiplexing is a technique to increase the data rate by transmitting different data for each antenna.
  • GCDD is a technique for applying selectivity in the time domain and the frequency domain.
  • S-VAP is a technique using a single precoding matrix.
  • Multi-codeword (MCW) S which mixes multiple codewords between antennas in spatial diversity or spatial multiplexing, and Single Codeword (SCW) S using single codeword. There is a VAP.
  • the STBC scheme is a scheme in which the same data symbol is repeated in a manner of supporting orthogonality in the time domain to obtain time diversity.
  • the SFBC technique is a method in which the same data symbols are repeated in a manner of supporting orthogonality in the frequency domain to obtain frequency diversity.
  • Equations 12 and 13 An example of a time block code used for STBC and a frequency block code used for SFBC is shown in Equations 12 and 13 below. Equation 12 shows a block code in the case of two transmit antennas, and Equation 13 shows a case in the case of four transmit antennas.
  • the CDD scheme increases frequency diversity by artificially increasing delay spread.
  • 10A and 10B show examples of a typical CDD structure in a multiple antenna system.
  • Figure 10a shows how to apply a cyclic delay in the time domain.
  • the CDD technique applying the cyclic delay of FIG. 10A may be implemented by applying phase-shift diversity as shown in FIG. 10B.
  • AAS active antenna system
  • AAS is a technique in which each antenna is composed of an active antenna including an active circuit, thereby reducing interference or efficiently supporting beamforming by changing an antenna pattern adaptively to a wireless communication environment.
  • the 2D-AAS may install an antenna in a vertical direction and a horizontal direction to construct an antenna system including a large amount of antennas.
  • the 2D-AAS as described above When the 2D-AAS as described above is introduced, a large amount of antennas may be installed by increasing the antenna in the vertical antenna area.
  • the design of a reference signal (RS) for measuring a channel for each antenna and the design of a method of feeding back channel information between the antenna and the terminal are important.
  • the reference signal overhead and the feedback overhead may increase linearly or exponentially with increasing number of antennas.
  • a Sounding Reference Signal may be used.
  • the SRS is an uplink reference signal transmitted by the terminal to the base station. SRS is used for more accurate calculation of the uplink channel of a specific terminal.
  • the SRS is transmitted separately from the PUCCH and the PUSCH.
  • the SRS may be transmitted on any subcarrier in the last symbol in the subframe.
  • the SRS may be transmitted prior to the transmission of other channels except for the transmission of the PUCCH format 1.
  • the SRS may be transmitted in the last two symbols of the special subframe.
  • the base station may determine the characteristics of the uplink channel of the terminal through the SRS.
  • the base station may perform uplink allocation for the terminal based on the determined uplink channel.
  • the SRS may be transmitted as a Zadoff-Chu (ZC) sequence.
  • ZC Zadoff-Chu
  • the base station may determine a rank index (RI) and a precoding matrix index (PMI) using the SRS.
  • RI rank index
  • PMI precoding matrix index
  • signaling overhead for obtaining RI and PMI can be reduced.
  • transmission of the SRS may be increased to reduce signaling overhead. In this case, increasing resources for the transmission of the SRS may be considered.
  • the transmitting side transmits a signal known to both the transmitting side and the receiving side, and the receiving side mainly uses a method of finding the channel information according to the degree of distortion of the received signal.
  • a signal known to both the transmitting side and the receiving side is called a pilot signal or a reference signal (RS).
  • RS reference signal
  • a reference signal may be classified into a reference signal for obtaining channel information and a reference signal for data demodulation. Since a reference signal for acquiring channel information is for the purpose of acquiring downlink channel information by the terminal, the terminal is transmitted over a wide band and the terminal that does not receive downlink data in a specific subframe receives and measures the corresponding reference signal. You should be able to.
  • the reference signal for channel information acquisition may also be used for channel state measurement for handover.
  • the reference signal for data demodulation is a reference signal transmitted together with a downlink resource when the base station transmits downlink data.
  • the terminal may perform channel estimation and demodulate data by receiving the reference signal.
  • the reference signal for demodulation is transmitted in the area where data is transmitted.
  • RS and CRS for acquiring information on channel status and measuring the handover
  • UE-specific RS used for data demodulation
  • the UE-specific reference signal is used only for data demodulation and the CRS may be used for both channel information acquisition and data demodulation.
  • the CRS is a cell-specific signal and may be transmitted every subframe in the case of wideband.
  • LTE-A LTE-Advanced
  • a reference signal capable of supporting up to eight transmit antennas is required.
  • the reference signal needs to be defined.
  • the overhead due to the reference signal is excessively increased.
  • CSI-RS channel state information reference signal
  • DM-RS decoding-reference signal
  • FIG. 12 and 13 are diagrams illustrating a structure of a reference signal in an LTE system supporting downlink transmission using four antennas.
  • FIG. 12 illustrates a case of normal cyclic prefix
  • FIG. 13 illustrates a case of extended cyclic prefix.
  • 0 to 3 described in the grid mean a common reference signal (CRS), which is a cell-specific reference signal transmitted for channel measurement and data demodulation corresponding to each of antenna ports 0 to 3.
  • CRS common reference signal
  • the CRS which is a cell specific reference signal, may be transmitted to the terminal not only in the data information region but also in the control information region.
  • 'D' described in the grid means a downlink DM-RS (DM-RS), which is a UE-specific RS, and the DM-RS supports single antenna port transmission through a data region, that is, a PDSCH.
  • DM-RS downlink DM-RS
  • the terminal is signaled through the upper layer whether the DM-RS which is the terminal specific RS is present.
  • 12 and 13 illustrate DM-RSs corresponding to antenna port 5, and 3GPP standard document 36.211 also defines DM-RSs for antenna ports 7 to 14, that is, a total of eight antenna ports.
  • the reference signal mapping rule to the resource block may be according to the following equations.
  • a reference signal may be mapped according to Equation 14 below.
  • a reference signal may be mapped to a dedicated RS (DRS) according to Equation 15 below.
  • DRS dedicated RS
  • Equations 14 and 15 k denotes an antenna port having a subcarrier index p.
  • N DL RB represents the number of resource blocks allocated for downlink
  • n s represents a slot index
  • N ID cell represents a cell ID.
  • the base station transmits CSI-RS for all antenna ports.
  • the CSI-RS may be transmitted intermittently in the time domain.
  • the CSI-RS may be transmitted periodically with an integer multiple of one subframe or may be transmitted in a specific transmission pattern. In this case, the period / pattern in which the CSI-RS is transmitted may be set by the base station.
  • the UE transmits the CSI-RS transmission subframe index for the CSI-RS antenna port of the cell to which the cell belongs, the CSI-RS resource element time-frequency position in the transmission subframe, and the CSI-RS. You need to know information such as RS sequence.
  • resources used for CSI-RS transmission of different antenna ports are orthogonal to each other.
  • a base station transmits CSI-RSs for different antenna ports, it maps the CSI-RSs for each antenna port to different resource elements, thereby making them available in a frequency division multiplexing (FDM) / time division multiplexing (TDM) scheme.
  • FDM frequency division multiplexing
  • TDM time division multiplexing
  • Resources can be allocated to be orthogonal to one another.
  • the base station may transmit the CSI-RS in a code division multiplexing scheme by mapping CSI-RSs for different antenna ports using codes orthogonal to each other.
  • the CSI-RS is transmitted at a period of 10 ms, and the offset is three.
  • the offset value may have a different value for each base station so that the CSI-RSs of the various cells may be evenly distributed to each other.
  • the offset that the base station may have is 10 values of 0 to 9.
  • the offset indicates an index value of a subframe in which a base station having a specific period starts CSI-RS transmission.
  • the terminal When the base station informs the period and the offset value of the CSI-RS, the terminal measures the CSI-RS of the base station at the corresponding location using the corresponding value and reports information such as CQI / PMI / RI to the base station. All information related to the CSI-RS is cell-specific information.
  • the base station transmits CSI-RSs at subframe indexes 3 and 4.
  • the transmission pattern is composed of 10 subframes, and whether or not to transmit CSI-RS in each subframe may be designated by a bit indicator.
  • two methods are considered as a method for informing a base station of a CSI-RS configuration by a base station.
  • the base station may transmit the CSI-RS configuration using DBCH signaling (Dynamic Broadcast CHannel) in which the base station broadcasts the CSI-RS configuration information to the terminals.
  • DBCH signaling Dynamic Broadcast CHannel
  • BCH Broadcasting CHannel
  • SI-RNTI System Information RNTI
  • All UEs in a cell can obtain system information by decoding the PDCCH using SI-RNTI and decoding the PDSCH indicated by the corresponding PDCCH.
  • a broadcasting method may be referred to as a DBCH, distinguished from a physical BCH (PBCH), which is a general broadcasting method.
  • PBCH physical BCH
  • the system information broadcast in the LTE system is a MIB (Master Information Block) transmitted to the PBCH and a SIB (System Information Block) transmitted multiplexed with general unicast data in the PDSCH.
  • SIB9 newly introduced in LTE-A.
  • the CSI-RS configuration may be transmitted using SIB10 or the like.
  • the base station may transmit the CSI-RS-related information to the terminal using Radio Resource Control (RRC) signaling.
  • RRC Radio Resource Control
  • the base station may transmit CSI-RS configuration to the terminal using RRC signaling.
  • the base station may transmit the CSI-RS configuration information to the terminal through an RRC signaling message requesting feedback based on the CSI-RS measurement.
  • MIMO technology using 2D-AAS may be referred to as full dimension MIMO (FD-MIMO).
  • FD-MIMO full dimension MIMO
  • SRS may be used to reduce overhead.
  • increasing resources for transmitting SRS may be considered.
  • a special subframe may be located between a downlink subframe and an uplink subframe.
  • subframe 6 may be set as a special subframe.
  • the special subframe may be configured of DwPTS, Guard Period (GP), and UpPTS.
  • DwPTS may be used for transmission of a downlink signal
  • UpPTS may be used for uplink transmission.
  • the GP exists for switching between uplink and downlink.
  • the GP exists for a terminal (hereinafter referred to as an edge UE) that exists at the edge of coverage of the base station.
  • the base station may transmit a signal to the edge terminal in the DwPTS.
  • the edge terminal may have a relatively high propagation delay.
  • the signal transmitted in the DwPTS may be received in the UpPTS due to the propagation delay.
  • the edge terminal transmits the uplink signal
  • the terminal needs to transmit the uplink data in the GP section before UpPTS in consideration of the propagation delay. Therefore, by placing the GP between the DwPTS and the UpPTS, it is possible to reduce the interference between the uplink signal and the downlink signal of the edge terminals transmitting and receiving in the special subframe.
  • the lengths of the DwPTS and UpPTS may be defined as shown in Table 1 below, and may be set in the terminal based on the special subframe configuration by the base station.
  • the above-mentioned special subframe configuration may be configured in the terminal through radio resource control (RRC) signaling.
  • RRC radio resource control
  • a terminal of a TDD wireless communication system may transmit SRS on up to two Orthogonal Frequency Division Multiplexing (OFDM) symbols of a special subframe.
  • OFDM Orthogonal Frequency Division Multiplexing
  • the SRS may be transmitted in one or at least one symbol located before the symbols assigned to UpPTS.
  • an SRS may be referred to as an extended SRS.
  • a new special subframe may be defined.
  • the transmission of the extended SRS in the previous one symbol of the UpPTS of the currently set special subframe may be described as one symbol being added to the UpPTS. That is, UpPTS can be extended. In order for UpPTS to be extended, DwPTS may be reduced. When UpPTS is extended while maintaining DwPTS, interference due to transmission of the extended SRS may occur. For example, the extended SRS transmission of the edge terminal may be affected by the DwPTS received by the adjacent terminal in the same subframe.
  • a new type of special subframe needs to be defined.
  • a special subframe including a DwPTS having one symbol less than the current DwPTS and an UpPTS having the same length as the current UpPTS may be defined.
  • This new special subframe may be configured in the terminal by the base station.
  • the base station may configure a special subframe including a DwPTS having one symbol fewer than a conventional DwPTS to a legacy UE that cannot recognize the extended SRS.
  • the base station includes a DwPTS having one symbol less than the conventional DwPTS and an UpPTS having one symbol more than the conventional UpPTS to the terminal (eg, an enhanced terminal) capable of recognizing the extended SRS.
  • a special subframe may be set.
  • the base station may use the special subframe configuration 8 of Table 1 described above.
  • the special subframe of the special subframe configuration 8 in the normal CP may consist of a DwPTS of 11 OFDM symbol lengths, a guard interval having 1 OFDM symbol length, and an UpPTS having 2 OFDM symbol lengths. That is, despite the propagation delay for the terminal located at the edge of the coverage, it means that the guard interval of the base station is sufficient to one OFDM symbol length.
  • the base station in order to support the extended SRS, the base station may configure the special subframe configuration 7 for the legacy terminal.
  • Special subframe configuration 7 in the normal CP may be composed of a DwPTS of 10 OFDM symbol length, a guard interval having three OFDM symbol length, and an UpPTS having one OFDM symbol length.
  • the guard interval of the base station is sufficient for one OFDM symbol length. Therefore, even if another terminal uses UpPTS of two OFDM symbols, the guard period set in the legacy terminal has a spare symbol of one OFDM symbol length.
  • the base station may configure a special subframe including a DwPTS having 10 OFDM symbol lengths, a guard interval having 2 OFDM symbol lengths, and an UpPTS having two OFDM symbol lengths in the improved terminal.
  • the improved terminal may transmit one SRS in UpPTS and additionally transmit an extended SRS in one symbol before UpPTS.
  • the extended SRS is transmitted in an OFDM symbol corresponding to a guard interval in a conventional terminal.
  • the conventional terminal has a guard interval of three OFDM symbol lengths.
  • the conventional terminal can receive the DwPTS without interference due to the extended SRS.
  • a special subframe whose length of DwPTS is shorter by 1 OFDM symbol than in the related art may be set.
  • a new special subframe configuration may be defined.
  • the special subframe of special subframe configuration 0 includes DwPTS of three OFDM symbol lengths.
  • DwPTS of two OFDM symbol lengths is not defined in the current special subframe configuration. Therefore, in the current special subframe configuration, it may be difficult to support the extended SRS as described above.
  • the extended SRS may be referred to as an enhanced SRS.
  • the special subframe of the special subframe configuration 3 includes a DwPTS having 11 OFDM symbol lengths, a guard period having 2 OFDM symbol lengths, and an UpPTS having 1 OFDM symbol length.
  • the base station in order to support the above-described extended SRS, has a special terminal including a DwPTS having 10 OFDM symbol lengths, a guard interval having 3 OFDM symbol lengths, and an UpPTS having 1 OFDM symbol length in a conventional terminal.
  • Subframes can be set.
  • the base station may set the special subframe configuration 7 in the conventional terminal.
  • the base station may be configured to include a DwPTS having 10 OFDM symbol lengths, a guard interval having two OFDM symbol lengths, and an UpPTS having two OFDM symbol lengths in the improved terminal.
  • the base station may configure the special subframe configuration 8 for the improved terminal.
  • both the conventional terminal and the improved terminal may be configured according to the conventional special subframe. That is, when the terminals can be configured according to the conventional special subframe configuration for the extended SRS, the new special subframe configuration may not be used.
  • the special subframe configuration of Table 2 may be set only for the improved terminal.
  • the new special subframe configuration may be included in the system information block.
  • the new special subframe configuration may be transmitted through higher layer signaling (eg, Radio Resource Control (RRC)).
  • RRC Radio Resource Control
  • the improved terminal may reinterpret the special subframe configuration for the conventional terminal. For example, the improved terminal may determine whether to use the conventional special subframe configuration (Table 1) or the new special subframe configuration (Table 2) based on the RRC signaling.
  • the special subframe settings 6 and 7 of Table 1 may be mapped to the special subframe settings 0 and 1 of Table 2, respectively.
  • a 1 bit RRC configuration for an improved terminal can be introduced.
  • the enhanced terminal may determine whether to use the new subframe configuration 0 or 1 instead of the conventional subframe configuration 6 or 7 based on the RRC signaling.
  • Each RRC bit for the downlink normal CP and the downlink extension CP may be used. Instead, using 1 bit of one RRC, whether or not to apply a new special subframe for the downlink normal CP and the downlink extension CP may be indicated to the UE.
  • the special subframe configuration 1 or 2 of Table 1 may be configured in the conventional UE, instead of the configuration 2 or 3 of the special subframe of Table 1, respectively. have.
  • the improved UE may determine whether to use the special subframe configuration 1 or 2 of Table 1 or the special subframe configuration 6 or 7 of Table 1 based on the RRC configuration. That is, the special subframe configuration may be reinterpreted based on the RRC signaling.
  • RRC signaling for reinterpretation of the special subframe configuration may be defined as independent bits. Instead, the RRC bit for reinterpretation of the special subframe configuration may be linked with the RRC bit for use of Table 2 described above.
  • one bit of RRC signaling may indicate both a reinterpretation of the special subframe configuration and the application of Table 2 in Table 1 described above.
  • the improved terminal uses the special subframe configuration 1 or 2 of Table 1 based on the aforementioned 1 bit or the special subframe configuration 6 or 7 of Table 1. You can decide whether or not.
  • the special subframe configuration 6 or 7 is indicated, the improved terminal may use the special subframe configuration 6 or 7 of Table 1 or the special subframe configuration 0 or 1 of Table 2 based on the same 1 bit. You can decide whether to use it.
  • the above-described application of the special subframe configuration may be equally applied to the downlink normal CP and the downlink extension CP.
  • application of the above-described special subframe configuration to the downlink normal CP and the downlink extension CP may be indicated by the same bit.
  • the special subframe configuration of Table 3 may be set only for the improved terminal.
  • the new special subframe configuration may be included in the system information block.
  • the new special subframe configuration may be transmitted through higher layer signaling (eg, Radio Resource Control (RRC)).
  • RRC Radio Resource Control
  • the improved terminal may reinterpret the special subframe configuration for the conventional terminal.
  • the improved terminal may determine whether to use the conventional special subframe configuration (Table 1) or the new special subframe configuration (Table 3) based on the RRC signaling.
  • the special subframe settings 0, 1, 2, and 3 of Table 3 may be mapped to the special subframe settings 1, 2, 6, and 7 of Table 1, respectively.
  • the enhanced UE may be informed whether to use the special subframe of Table 3 through RRC signaling.
  • the UE may be instructed whether to follow the existing special subframe configuration or the new special subframe configuration using one bit of RRC signaling.
  • the same one RRC bit may be used for the downlink normal CP and the downlink extension CP.
  • the legacy terminal may be configured according to the special subframe configuration of Table 1.
  • the improved UE may use a subframe including a 1 symbol reduced DwPTS and a 1 symbol increased UpPTS from the special subframe configuration of Table 1.
  • a new special subframe configuration consisting of DwPTS with one symbol reduced and UpPTS with one symbol increased may be applied to the improved UE.
  • whether to apply the new special subframe configuration may be indicated to the terminal using 1 bit of RRC signaling.
  • the improved UE may not use the new special subframe configuration.
  • the CRS of the 9th or 12th symbol may not be received.
  • the new special subframe configuration may not include the special subframe configuration corresponding to the 12 symbol or 9 symbol length DwPTS of the conventional special subframe configuration in the case of the downlink normal CP. That is, the new special subframe configuration may not include the 11 symbol length DwPTS or the 8 symbol length DwPTS for the downlink normal CP.
  • the improved terminal may not use a new special subframe configuration. This is because the CRS of the 8th or 10th symbol may not be received. Therefore, the new special subframe configuration may not include the special subframe configuration corresponding to the 8 symbol or 10 symbol length DwPTS of the conventional special subframe configuration in case of the downlink extension CP. That is, the new special subframe configuration may not include a DwPTS of 9 symbols or 7 symbols in length for the downlink extension CP.
  • the new special subframe configuration described above may not include a two symbol length DwPTS for the downlink normal CP and the downlink extension CP.
  • the conventional terminal may use a 3 symbol length DwPTS. In this case, the PDCCH transmitted in the third symbol may not be received. Therefore, the two symbol length DwPTS may be excluded from the new special subframe configuration.
  • center terminals only terminals located in the center of coverage of a cell in DwPTS (hereinafter, may be referred to as center terminals) may be scheduled. In this case, even if the edge terminal of another edge terminal or the neighboring cell in the cell transmits the extended SRS, the interference between DwPTS and UpPTS (or the extended SRS) is low.
  • Second, only center terminals in UpPTS may be scheduled to transmit extended SRS.
  • the center terminal and the edge terminal may be determined based on a predetermined propagation delay. For example, a terminal having a transmission delay of a predetermined value or more may be defined as an edge terminal, and a terminal having a transmission delay of a predetermined value or less may be defined as a center terminal.
  • the first and / or second method described above may be preset at base stations belonging to a network or at a base station through RRC signaling.
  • the first and / or second method described above may be difficult to apply to some special subframe settings.
  • the guard period is configured with 1 symbol (for example, special subframe configuration 8 of the downlink normal CP)
  • the guard period for the propagation delay does not remain.
  • DwPTS and UpPTS may occur. Therefore, extended SRS may not be supported for the special subframe configuration in which the guard period is 1 symbol.
  • the improved terminal may be set not to transmit the extended SRS.
  • Periodic SRS triggering and aperiodic SRS triggering in uplink of current LTE communication may be performed according to the following description.
  • k SRS is a subframe index within a frame, and in the case of FDD, ⁇ 0, 1,... , 9 ⁇ . In addition, in the case of TDD, k SRS has a value shown in Table 4 below.
  • Subframe index n One 2 3 4 5 6 7 8 9 First symbol of UpPTS Second symbol of UpPTS First symbol of UpPTS Second symbol of UpPTS If the length of UpPTS is 2 symbols, k SRS 0 One 2 3 4 5 6 7 8 9 K SRS if the length of UpPTS is 1 symbol One 2 3 4 6 7 8 9
  • a UE configured for aperiodic SRS transmission on the serving cell c may receive an n + k subframe (k is 4 or more) that satisfies Equation 18 below. SRS transmission should be performed.
  • k SRS is a subframe index within frame n f , and in the case of FDD, ⁇ 0, 1,... , 9 ⁇ .
  • k SRS has the value of Table 4 above.
  • T SRS , T offset , T SRS, 1 , and T offset, 1 may be set according to Tables 5 and 6 below.
  • SRS Settings Index I SRS SRS cycle-T SRS (ms) SRS subframe offset T 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
  • SRS Settings Index I SRS SRS period T SRS, 1 (ms) SRS subframe offset T offset, 1 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 25-31 reserved reserved
  • k SRS means a subframe number.
  • k SRS means first and second symbols of UpPTS of subframe 1 and UpPTS first and second symbol of subframe 6, respectively (Table 4 Reference).
  • Uplink- Downlink Settings Downlink-uplink Conversion cycle (Switch-point pericodicity) Subframe number 0 One 2 3 4 5 6 7 8 9 0 5 ms D S U U U D S U U U One 5 ms D S U U D D S U U D 2 5 ms D S U D D D S U D D 3 10 ms D S U U U D D D D D D 4 10 ms D S U U D D D D D D D 5 10 ms D S U D D D D D D D D D 6 5 ms D S U U U U D S U U D S U U D
  • Table 7 shows uplink or downlink configuration of each subframe according to the TDD uplink-downlink configuration.
  • D denotes a downlink subframe
  • S denotes a special subframe
  • U denotes a downlink subframe.
  • subframes 0 and 6 are both downlink subframes. That is, k SRS indicates one of two symbols of UpPTS.
  • the terminal configured with I SRS 0 in Table 5 transmits the SRS according to Equation 17.
  • the terminal transmits the SRS in all UpPTS symbols having k SRSs of 0, 1, 5, and 6, according to Table 4.
  • the UE may determine which four symbols of the symbols of up to six UpPTSs are indicated from the case of up to two UpPTSs per one radio frame.
  • k SRS 0, 1, 5 may be configured to indicate 3 symbols, respectively.
  • k SRS 0, 1 may be configured to indicate two symbols of the three symbols. This configuration may be set through the RRC configuration for each terminal.
  • k SRS 0, 1 may be configured to indicate 2 of 3 symbols of UpPTS of the first special subframe.
  • k SRS 5, 6 may be configured to indicate two of the three symbols of UpPTS of the second special subframe. This configuration may be set through the RRC configuration for each terminal.
  • Table 5 and Table 6 may be used as it is.
  • subframes or UpPTS symbols indicated by k SRS may be set differently for each TDD configuration.
  • a special subframe configuration different from Table 4 may be defined so that the k SRS number for the downlink is deleted and k SRS can be indicated up to the third symbol of UpPTS.
  • a TDD special subframe configuration as shown in Table 8 below may be introduced.
  • TDD configuration 0 in case of 3 symbols UpPTS
  • the UE may be configured not to transmit the SRS in the third symbol of UpPTS.
  • k SRS ⁇ 0, 1, 2, 3, 4 ⁇ and ⁇ 5, 6, 7, 8, 9 ⁇ are five subframes in one radio frame. Mapped to units. Since the SRS is transmitted where k SRS satisfying Equation 17 is indicated, the SRS may be evenly transmitted in units of five subframes by a modulo 5 operation.
  • mapping relationships between 11 resources and 10 k SRSs for SRS transmission may be differently set for each terminal.
  • the mapping relationship may be set in the terminal by the RRC configuration.
  • a mapping relationship between 12 resources and 10 k SRSs for SRS transmission may be set differently for each UE based on the RRC configuration.
  • the SRS is transmitted in up to four or six symbols in UpPTS.
  • the SRS may be transmitted in two or four symbols of the UpPTS.
  • the RRC value for determining additional SRS transmissions in two or four symbols in UpPTS may be called "EUpPTS4SRS".
  • the RRC value for determining additional SRS transmissions in two or four symbols in UpPTS may be called "EUpPTS4SRS".
  • the RRC value for determining additional SRS transmissions in two or four symbols in UpPTS may be called "EUpPTS4SRS".
  • the value of "EUpPTS4SRS” is the first value
  • an SRS may be additionally transmitted in 2 symbols.
  • the value of "EUpPTS4SRS” is the second value
  • SRS may be additionally transmitted in 4 symbols.
  • the first value and the first value may correspond to 0 and 1 or vice versa, respectively.
  • the k SRS value for “EUpPTS4SRS” may be defined as shown in Table 9 below.
  • a row located below a subframe index (0, 1, ..., 9) means a k (1, 2, 3, 4, 5, 6) symbol in UpPTS.
  • k SRS is defined only for the symbols in UpPTS in which additional SRSs are transmitted. This is because a SRS may be transmitted through a legacy SRS in a symbol other than a symbol in an UpPTS to which an additional SRS is transmitted or a subframe other than a subframe of an UpPTS to which an additional SRS is transmitted.
  • k SRS has a value of 0 and 1 for the symbol of the third and fourth UpPTS of the first subframe.
  • k SRS has a value of 5 and 6 for the symbol of the third and fourth UpPTS of the second subframe.
  • the kSRS has a difference of 5 depending on whether the third UpPTS symbol is subframe 1 or subframe 6. Also, k SRS has a difference of 5 depending on whether the fourth UpPTS symbol is subframe 1 or subframe 6. Therefore, in case of SRS transmission of 2ms period, SRS may be transmitted four times in one radio frame. That is, without the use of Table 9, the values of k for the SRS sub-frame # 1 and sub-frame 6 so as to have a difference of 5 may be k SRS design values of the numbers 0 to 9 are selected.
  • a row located below a subframe index (0, 1, ..., 9) means an n (1, 2, 3, 4, 5, 6) th symbol in UpPTS.
  • subframes other than the special subframes also specify k SRS values, thereby ensuring flexible and efficient SRS transmission.
  • 16 is a flowchart of a method of transmitting a reference signal in a special subframe according to an embodiment.
  • the terminal receives information bits for the first special subframe configuration and the extended reference signal indicating the configuration of the special subframe from the base station (S1601).
  • the first special subframe configuration may be an LTE TDD special subframe.
  • the reference signal and the extended reference signal may be an SRS and an extended SRS.
  • the information bit may be the above-described RRC configuration or RRC signaling.
  • the information bits and the first special subframe configuration may be received via higher layer signaling (eg, RRC signaling).
  • the special subframe setting to be applied may be determined based on the value of the information bit (S1602). For example, when the information bit has a first value, the terminal may transmit a reference signal according to the first special subframe setting (S1603). Also, for example, when the information bit has a second value, the terminal may transmit a reference signal according to the second special subframe setting (S1604).
  • the first value may be 0 or 1 and the second value may be 1 or 0.
  • the second special subframe configuration is different from the newly defined special subframe configuration or the first special subframe configuration mapped to the first special subframe configuration. It may be a special subframe setting.
  • a newly defined symbol index may be used for extended SRS transmission.
  • FIG. 17 is a diagram schematically illustrating a configuration of devices to which the embodiments of the present invention described with reference to FIGS. 1 to 16 may be applied as an embodiment of the present invention.
  • the first device 1700 and the second device 1750 may include radio frequency units (RF units) 1710 and 1760, processors 1720 and 1770, and optionally memories 1730 and 1780. have.
  • the first device 1700 and the second device 1750 may be a terminal and / or a base station.
  • Each Radio Frequency (RF) unit 1730, 1760 may include a transmitter 1711, 1761 and a receiver 1712, 1762, respectively.
  • Each RF unit 1730, 1760 may be a transceiver.
  • the transmitter 1711 and receiver 1712 of the first device 1700 are configured to transmit and receive signals with the second device 1750 and other terminals, and the processor 1720 is a transmitter 1711 and a receiver 1712.
  • the transmitter 1711 and the receiver 1712 may be configured to control a process of transmitting and receiving signals with other devices.
  • the first device 1700 and / or the second device 1750 may be a base station.
  • the processor 1720 may perform various processing on a signal to be transmitted, transmit the same to the transmitter 1711, and may perform processing on a signal received by the receiver 1712. If necessary, the processor 1720 may store the information included in the exchanged message in the memory 1730.
  • the first device 1700 can perform the method of the various embodiments of the present invention described above.
  • each signal and / or message may be transmitted and received using a transmitter and / or receiver of an RF unit, and each operation may be performed under the control of a processor.
  • the first device 1700 may include various additional components according to the device application type.
  • the first device 1700 may include an additional configuration for power measurement, and the like.
  • the power measurement operation may be performed by the processor 1720. It may be controlled, or may be controlled by a separately configured processor (not shown).
  • the second device 1750 may be a base station.
  • the transmitter 1761 and the receiver 1762 of the base station are configured to transmit and receive signals with other base stations, servers, and devices, and the processor 1770 is functionally connected to the transmitter 1701 and the receiver 1762.
  • the transmitter 1761 and the receiver 1762 may be configured to control a process of transmitting and receiving a signal with other devices.
  • the processor 1770 may perform various processing on a signal to be transmitted, transmit the same to the transmitter 1701, and may perform processing on a signal received by the receiver 1762. If necessary, the processor 1770 may store information included in the exchanged message in the memory 1730. With such a structure, the base station 1750 can perform the methods of the various embodiments described above.
  • the processors 1720 and 1770 of the first device 1710 and the second device 1750 respectively indicate an operation (for example, control) at the first device 1710 and the second device 1750. , Coordination, management, etc.).
  • Respective processors 1720 and 1770 may be connected to memories 1730 and 1780 that store program codes and data.
  • the memories 1730 and 1780 are coupled to the processors 1720 and 1770 to store operating systems, applications, and general files.
  • the processors 1720 and 1770 of the present invention may also be referred to as a controller, a microcontroller, a microprocessor, a microcomputer, or the like.
  • the processors 1720 and 1770 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
  • firmware or software when implementing embodiments of the present invention using firmware or software, 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.
  • Firmware or software configured to be may be provided in the processor or stored in a memory to be driven by the processor.
  • 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.
  • Embodiments of the present invention as described above may be applied to various mobile communication systems.

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Abstract

La présente invention concerne un procédé permettant de prendre en charge un créneau temporel pilote de liaison montante (UpPTS) étendu dans une sous-trame spéciale. Un terminal selon la présente invention peut déterminer si un UpPTS étendu doit être appliqué sur la base d'une configuration de sous-trame spéciale et d'un bit d'information. Si l'UpPTS étendu est pris en charge, alors le terminal peut émettre un signal de référence et un signal de référence étendu grâce à la configuration de sous-trame spéciale mise en correspondance dans la configuration de sous-trame spéciale indiquée.
PCT/KR2016/010645 2015-09-24 2016-09-23 Procédé d'émission et de réception d'un signal à partir d'une sous-trame spéciale et appareil pour ledit procédé WO2017052260A1 (fr)

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