WO2017030325A1 - Procédé permettant d'émettre ou de recevoir un signal dans une sous-trame spéciale et appareil associé - Google Patents

Procédé permettant d'émettre ou de recevoir un signal dans une sous-trame spéciale et appareil associé Download PDF

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WO2017030325A1
WO2017030325A1 PCT/KR2016/008885 KR2016008885W WO2017030325A1 WO 2017030325 A1 WO2017030325 A1 WO 2017030325A1 KR 2016008885 W KR2016008885 W KR 2016008885W WO 2017030325 A1 WO2017030325 A1 WO 2017030325A1
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special subframe
downlink
terminal
base station
dwpts
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PCT/KR2016/008885
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English (en)
Korean (ko)
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김영태
양석철
김기준
박종현
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엘지전자 주식회사
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Publication of WO2017030325A1 publication Critical patent/WO2017030325A1/fr

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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

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 a special subframe setting indicating a configuration of a special subframe from a base station, wherein the special subframe includes a downlink pilot time slot (DwPTS) and a guard interval. (Guard Period, GP), and Uplink Pilot Time Slot (UpPTS); Receiving a downlink signal transmitted by the base station in the DwPTS; And in the special subframe, when reference signal transmission is scheduled in at least one symbol before the UpPTS, determining whether the reference signal transmission is missing.
  • DwPTS downlink pilot time slot
  • Guard interval Guard Period, GP
  • UpPTS Uplink Pilot Time Slot
  • the omission of the reference signal transmission may be determined based on the signaling from the base station.
  • signaling may be received through higher layer signaling or downlink control information.
  • the omission of the reference signal transmission may be determined based on a propagation delay of the terminal.
  • the reference signal may be a sounding reference signal (SRS). Also, preferably, when the sounding reference signal is a periodic sounding reference signal, it may be determined that transmission of the reference signal is omitted.
  • SRS sounding reference signal
  • the method for receiving a downlink signal of a terminal for solving the above-described problem is a step of receiving a special subframe configuration indicating a configuration of a special subframe from a base station, wherein the special subframe is protected by a downlink pilot time slot (DwPTS) A period of Guard Period (GP), and Uplink Pilot Time Slot (UpPTS); And puncturing at least a portion of a downlink signal transmitted by the base station in the DwPTS of the special subframe when a reference signal transmission is scheduled in at least one symbol before the UpPTS in the special subframe. And determining).
  • DwPTS downlink pilot time slot
  • GP Guard Period
  • UpPTS Uplink Pilot Time Slot
  • the puncturing may be determined based on signaling from the base station.
  • the signaling may be received through higher layer signaling or downlink control information.
  • the puncturing may be determined based on a propagation delay of the terminal.
  • the reference signal is a non-periodic sounding reference signal (SRS)
  • SRS non-periodic sounding reference signal
  • the downlink signal may be a downlink signal excluding a physical downlink control channel (PDCCH) or an enhanced PDCCH (EPDCCH).
  • PDCH physical downlink control channel
  • EPDCCH enhanced PDCCH
  • the terminal for solving the above problems, the transceiver configured to transmit and receive radio signals; And a processor configured to control the transceiver, wherein the processor receives a special subframe setting indicating a configuration of a special subframe from a base station, and the special subframe includes a downlink pilot time slot (DwPTS) and a guard interval (DwPTS). Guard Period (GP), and UpPTS (Uplink Pilot Time Slot), in which the DwPTS receives a downlink signal transmitted by the base station, and within the special subframe, at least one before the UpPTS. If a reference signal transmission is scheduled in the symbol of, it may be further configured to determine whether the reference signal transmission is missing.
  • DwPTS downlink pilot time slot
  • DwPTS guard interval
  • GP Guard Period
  • UpPTS Uplink Pilot Time Slot
  • the transceiver configured to transmit and receive wireless signals; And a processor configured to control the transceiver, wherein the processor receives a special subframe setting indicating a configuration of a special subframe from a base station, and the special subframe includes a downlink pilot time slot (DwPTS) and a guard interval (DwPTS). Guard Period, GP), and UpPTS (Uplink Pilot Time Slot), and in the special subframe, when reference signal transmission is scheduled in at least one symbol before the UpPTS,
  • the DwPTS may further be configured to determine whether to puncture at least a portion of a downlink signal transmitted by the base station.
  • 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 configuration of a special subframe according to an embodiment.
  • FIG. 13A is a flowchart of a method of transmitting a reference signal in a special subframe according to an embodiment.
  • 13B is a flowchart of a downlink signal reception method in a special subframe according to an embodiment.
  • FIG. 14 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 channel transmission capacity is theoretically proportional to the number of antennas, unlike when the transmitter or the receiver uses multiple antennas. This increases. Therefore, it is possible to improve transmission rate and significantly improve frequency efficiency.
  • the transmission rate according to the increase in the channel transmission capacity may theoretically increase as the maximum rate R0 in the case of using one antenna is multiplied by the increase rate Ri of Equation 1 below.
  • 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. Assume that there are N T transmit antennas and N R receive antennas as shown in FIG. 6A. 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.
  • These channels can be grouped together and displayed in vector and matrix form.
  • An example of the vector display is described as follows. 6B illustrates 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 N R receiving antennas When expressed as a vector is expressed by the following equation (9).
  • 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 represents a block code in the case of a two-transmission antenna, and equation (13) in the case of a four-transmission antenna.
  • Equations 12 and 13 represent modulated data symbols. Further, the rows of the matrices of equations (12) and (13) represent antenna ports, and the column represents time (in case of STBC) or frequency (in case of SFBC).
  • 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 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.
  • 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 in previous symbols of symbols assigned to UpPTS (ie, symbols at the end of the GP on the time axis), the SRS may be transmitted. That is, additional resources for transmission of the SRS may be set in the OFDM symbols of the GP adjacent to the UpPTS.
  • the last symbols of the GP used for the transmission of the SRS may be referred to as an extended UpPTS.
  • FIG. 12 illustrates a configuration of a special subframe according to an embodiment.
  • an extended UpPTS consisting of N OFDM symbols, where N is an integer of 1 or more, is located in front of the UpPTS.
  • the extended UpPTS may consist of two or more symbols.
  • the base station may direct the terminal to SRS transmission in the last symbol (ie, OFDM symbol # 1 of the extended UpPTS of FIG. 12 as the first OFDM symbol on the right).
  • the terminal may receive data transmitted in the DwPTS in a part of the GP interval due to the propagation delay.
  • the terminal may transmit data allocated to UpPTS in a part of the GP period in consideration of timing advance (TA) due to a propagation delay.
  • TA timing advance
  • a reception timing of downlink data allocated to DwPTS and a transmission timing of uplink data allocated to UpPTS may overlap.
  • the terminal may not receive a downlink signal or may not transmit an uplink signal (SRS).
  • SRS uplink signal
  • symbols of the extended UpPTS are indexed from 1 to N in FIG. 12, they may be indexed from 0 to N-1.
  • the symbols of the extended UpPTS are indexed in the reverse order on the time axis, they may be sequentially indexed on the time axis.
  • the last symbols of DwPTS are indexed from 1 to M (where M is an integer of 1 or more).
  • M is an integer of 1 or more
  • the last symbols of DwPTS may be indexed from 0 to M-1.
  • the last symbols of the DwPTS are indexed in reverse order on the time axis, but may be sequentially indexed on the time axis.
  • overlap of uplink transmission timing and downlink reception timing may occur only in some terminals.
  • terminals having a long propagation delay such as edge terminals may overlap the above-described transmission timing and reception timing.
  • the base station may know the propagation delay for each terminal.
  • SRS transmission in an extended UpPTS based on the above is proposed.
  • the base station may indicate the information of the resource for the transmission of the SRS through the extended UpPTS to the terminal.
  • the base station may indicate to the terminal information of a resource for transmitting a downlink signal in the DwPTS.
  • the downlink signal of the DwPTS may refer to the remaining downlink signal except for the PDCCH or the enhanced PDCCH (ePDCCH) allocated to the corresponding DwPTS.
  • the downlink signal of DwPTS in the following embodiments may refer to a PDSCH.
  • some (OFDM) symbols of the DwPTS may refer to at least some of the remaining symbols except for the PDCCH or the enhanced PDCCH (ePDCCH) allocated to the corresponding DwPTS.
  • some symbols of DwPTS in the following embodiments may refer to at least some of the symbols to which the PDSCH has been assigned.
  • the base station may instruct the terminal to transmit the SRS in at least some of some OFDM symbols of the extended UpPTS.
  • the UE may be instructed to transmit the SRS in at least some of 1 to N OFDM symbols (see FIG. 12) of the extended UpPTS.
  • the UE may receive a downlink signal in the DwPTS of the special subframe.
  • the base station may not transmit a signal to the terminal for some symbols of the DwPTS.
  • the base station may indicate to the terminal that the downlink signal is not transmitted from the last symbol of the DwPTS to the Mth symbol to the left.
  • the terminal receiving the indication of the base station may assume that the downlink signal is not transmitted from the last symbol of the DwPTS to the Mth symbol to the left.
  • the above assumption may be referred to as a DwPTS non-transmission hypothesis.
  • the base station may instruct the terminal semi-statically the DwPTS non-transmission assumption using higher layer signaling (eg, Radio Resource Control (RRC) signaling).
  • RRC Radio Resource Control
  • the base station may dynamically instruct the DwPTS non-transmission assumption to the terminal using control information (for example, downlink control information (DCI)).
  • DCI downlink control information
  • the base station may instruct the terminal to semi-static the above-described M value using higher layer signaling (eg, Radio Resource Control (RRC) signaling).
  • RRC Radio Resource Control
  • the base station may dynamically indicate the M value to the terminal using control information (eg, downlink control information (DCI)).
  • DCI downlink control information
  • an OFDM symbol in which a UE transmits an SRS for the first (most left) of OFDM symbols of an extended UpPTS may be assumed to be an OFDM symbol N2 (where N2 is an integer less than or equal to N).
  • the value of M may be instructed to the terminal in association with the value of N2.
  • the value of M may be preset according to the value of N2.
  • the relationship between the values of M and N2 may be preset or may be instructed by the base station to the terminal.
  • the value of M may be determined based on the propagation delay value of the terminal.
  • the value of M may have a preset value according to the propagation delay value.
  • M and N2 may be preset to have the same value.
  • the terminal may assume that the above-described M value and N value.
  • the base station may instruct the terminal to transmit the SRS in the Nth symbol (in the left direction) from the last symbol of the extended UpPTS.
  • the UE when receiving the downlink signal in the DwPTS, the UE may assume that the downlink signal is not transmitted from the last right symbol to the Nth symbol to the left of the OFDM symbols of the DwPTS.
  • separate signaling is not received from the base station, and is instructed by the base station to transmit the SRS in the Nth OFDM symbol from at least some OFDM symbols of the extended UpPTS or the last OFDM symbol of the extended UpPTS, and the terminal is instructed to A downlink signal may be received in the DwPTS.
  • the UE may assume reception of a downlink signal in all OFDM symbols of DwPTS according to TDD configuration.
  • the base station may instruct the terminal to transmit the SRS in the Nth OFDM symbol (Nth OFDM symbol left from the last OFDM symbol) of the extended UpPTS.
  • the terminal may receive a downlink signal in the DwPTS.
  • the base station may indicate to the terminal only up to the number of symbols from the left of the UpPTS. That is, the base station may indicate whether to transmit the SRS in a symbol equal to or greater than the K th (where K is an integer of 1 or more) symbol from the start symbol of UpPTS (ie, the last left symbol of FIG. 12) to the left.
  • the base station may transmit the indication based on the first symbol (ie, the last left symbol) of the UpPTS.
  • the base station may indicate resources for which SRS transmission is not assumed.
  • the K value may be set equal to the value of M of the above-described first embodiment.
  • the base station instructs the terminal to semi-static the above-described K value using higher layer signaling (eg, Radio Resource Control (RRC) signaling). You may.
  • the base station may dynamically indicate the K value to the terminal using control information (eg, downlink control information (DCI)).
  • DCI downlink control information
  • an OFDM symbol in which a UE transmits an SRS for the first (most left) of OFDM symbols of an extended UpPTS may be assumed to be an OFDM symbol N2 (where N2 is an integer less than or equal to N).
  • the value of K may be indicated to the terminal in association with the value of N2.
  • the value of K may be preset according to the value of N2.
  • the relationship between the values of K and N2 may be preset or may be instructed by the base station to the terminal. Also, the value of K may be determined based on the propagation delay value of the terminal. For example, the value of K may have a preset value according to the propagation delay value. K and N2 may also be preset to have the same value.
  • the UE may assume that the above-described K value and N value.
  • the base station may instruct the terminal to transmit the SRS in the Nth symbol (in the left direction) from the last symbol of the extended UpPTS.
  • the UE may assume that the downlink signal is not transmitted from the last right symbol to the Nth symbol to the left of the OFDM symbols of the DwPTS.
  • separate signaling is not received from the base station, and is instructed by the base station to transmit the SRS in the Nth OFDM symbol from at least some OFDM symbols of the extended UpPTS or the last OFDM symbol of the extended UpPTS, and the terminal is instructed to A downlink signal may be received in the DwPTS.
  • the UE may assume that the SRS is transmitted in the Nth symbol to the left from the last left symbol on the new axis of the UpPTS.
  • the base station may instruct the terminal to transmit the SRS in at least a portion of the extended UpPTS including the Nth symbol in a left direction from the last right symbol of the extended UpPTS (see FIG. 12).
  • the UE may receive a downlink signal in the DwPTS of the special subframe.
  • the UE assumes transmission of the SRS in the N-th symbol and may puncture OFDM symbols of the DwPTS that cannot be received.
  • the terminal may determine puncturing based on a signal from the base station.
  • the base station may instruct puncturing semi-statically to the terminal through higher layer signaling or dynamically through information such as DCI.
  • the terminal may determine puncturing based on an indication of transmission of the SRS in the extended UpPTS or an indication of an OFDM symbol for transmission of the SRS in the UpPTS.
  • the UE may determine puncturing based on an indication of a specific resource or a specific OFDM symbol in the DwPTS.
  • the base station may instruct the terminal to transmit the SRS in at least a portion of the extended UpPTS including the Nth symbol in the left direction from the last right symbol of the extended UpPTS (see FIG. 12).
  • the terminal may receive a downlink signal in the DwPTS of the special subframe. In this case, the terminal may receive all of the downlink signals corresponding to the DwPTS and drop at least part of the SRS transmission in the extended UpPTS. For example, the UE may miss SRS transmission from the last right symbol of the extended UpPTS to the Nth symbol to the left.
  • the omission of the above-described SRS transmission may be determined based on signaling from the base station.
  • the base station may instruct the terminal to semi-statically indicate the omission of the SRS transmission through higher layer signaling or dynamically through information such as DCI.
  • the terminal may determine the omission of the SRS transmission based on an indication of a specific resource or a specific OFDM symbol in the DwPTS.
  • the base station may instruct the terminal to transmit the SRS in at least a portion of the extended UpPTS including the Nth symbol in a left direction from the last right symbol of the extended UpPTS (see FIG. 12).
  • the UE may receive a downlink signal in the DwPTS of the special subframe.
  • the base station may instruct the terminal of the information on the downlink reception resources in the DwPTS and the information on the SRS transmission resources in the extended UpPTS.
  • the base station indicates information (or hypothesis) indicating that the SRS is not transmitted over the M2 (where M2 is an integer greater than or equal to 1) symbol from the last symbol of the extended UpPTS (the last symbol in the right of FIG. 12) to the left. Can be transmitted to the terminal.
  • the base station may semi-statically indicate the above information through higher layer signaling.
  • the base station may dynamically indicate the above-described information using downlink control information such as DCI.
  • the above-described values of M1 and / or M2 may be indicated together with the above-described information or may be indicated through separate signaling.
  • the values of M1 and / or M2 may be semi-statically indicated through higher layer signaling or may be dynamically indicated through downlink control information such as DCI.
  • the leftmost symbol among the OFDM symbols to which the SRS is transmitted may be assumed to be N2.
  • the value of M1 and / or M2 may be associated with the value of N2.
  • the value of M1 and / or M2 may be determined by the terminal based on the value of N2.
  • the value of M1 and / or M2 may be preset according to the value of N2.
  • the value of M1 and / or M2 may be set to have a value equal to half of N2.
  • the value of M1 and / or M2 may be related to the propagation delay value of the terminal.
  • the value of M1 and / or M2 may be preset according to the value of the propagation delay.
  • the terminal may assume that the value of M1 and / or M2 is equal to half of the value of N2.
  • the base station may instruct the terminal to transmit the SRS in at least a portion of the extended UpPTS including the Nth symbol in the left direction from the last right symbol of the extended UpPTS (see FIG. 12).
  • the UE may receive a downlink signal in the DwPTS of the special subframe. In this case, the terminal may not expect to receive the downlink signal from the last symbol of the DwPTS to the M1 (eg, N2 / 2) th symbol to the left.
  • the UE may assume that the SRS is not transmitted in a symbol more than the M2 (eg, N2 / 2) th symbol from the last symbol of the extended UpPTS.
  • the base station may instruct the terminal to transmit the SRS in at least a portion of the extended UpPTS including the Nth symbol in a left direction from the last right symbol of the extended UpPTS (see FIG. 12).
  • the UE may receive a downlink signal in the DwPTS of the special subframe. In this case, the UE may assume that the downlink signal is not received from the last OFDM symbol of the DwPTS to the Mth symbol to the left. That is, the UE may assume that the downlink signal is received from the last OFDM symbol of DwPTS to the M + 1th symbol to the left.
  • the UE may omit at least a part of the transmission of the SRS signal. have.
  • the terminal may miss transmission of the SRS signal in the extended UpPTS.
  • the base station may instruct the terminal to transmit the SRS in at least a portion of the extended UpPTS including the Nth symbol in the left direction from the last right symbol of the extended UpPTS (see FIG. 12).
  • the UE may receive a downlink signal in the DwPTS of the special subframe. In this case, the UE may assume that the SRS is transmitted in the Mth symbol to the left from the last symbol of the extended UpPTS, and may puncture OFDM symbols corresponding to the unreceivable DwPTS.
  • the terminal is instructed or configured to transmit the SRS in the extended UpPTS.
  • the terminal transmits the SRS in the extended UpPTS according to the indication / configured.
  • the UE may perform the following operation. First, the terminal may receive the downlink signal without puncturing and may omit transmission of the indicated / configured SRS in all or the first partial symbols of the extended UpPTS. Second, the terminal may puncture and receive the last part of the downlink signal, and may transmit the SRS indicated / configured in the extended UpPTS.
  • the UE may be indicated through a downlink (or uplink) grant DCI for scheduling higher layer signaling (eg, RRC signaling) or DwPTS.
  • the omission of the uplink SRS or the puncturing of the downlink signal may be determined based on signaling from the base station.
  • the above-described signaling may be instructed semi-statically to the terminal using higher layer signaling (eg, radio resource control (RRC) signaling).
  • RRC radio resource control
  • the above-described signaling may be dynamically instructed to the terminal using control information (eg, downlink control information (DCI)).
  • DCI downlink control information
  • the UE may puncture a downlink signal from the last OFDM symbol of the DwPTS to the Mth symbol to the left.
  • the value of M may be associated with the value of N2.
  • the value of M may be determined by the terminal based on the value of N2.
  • the value of M may be preset according to the value of N2.
  • the value of M may be related to the propagation delay value of the terminal.
  • the value of M may be preset according to the value of the propagation delay.
  • N2 and M may be preset such that the value has a value. Further, for example, M may be a preset value.
  • the above schemes may be applied independently, but may be selectively applied through signaling (RRC signaling or DL (or UL) grant DCI) from the base station.
  • the terminal when the terminal performs both the reception of the downlink signal in the DwPTS and the uplink signal (eg, SRS) in the extended UpPTS, the terminal is a DwPTS Some or all of the downlink signals may be punctured or some or all of the SRS signals of the extended UpPTS may be omitted.
  • the terminal may ignore the DCI of the downlink signal of the DwPTS.
  • the UE may ignore the downlink DCI scrambled with the Cell-Radio Network Temporary Identifier (C-RNTI).
  • C-RNTI Cell-Radio Network Temporary Identifier
  • one UE may be defined not to perform downlink signal reception in the DwPTS and SRS transmission in the extended UpPTS in the same subframe.
  • the transmission start timing of the signal in the extended UpPTS may be partially or totally the signal in the DwPTS. It may also be set such that it cannot be earlier than the timing at which reception of the symbol ends.
  • the transmission start timing of the extended UpPTS may be set earlier than the transmission start timing of the actual uplink signal in consideration of the DL / UL switching time.
  • the base station may select the TDD special subframe configuration based on the maximum propagation delay of the terminal according to cell coverage at the time of network setting.
  • DwPTS, GP, and UpPTS have different lengths depending on the special subframe configuration.
  • the base station determines that the transmission start timing of the extended UpPTS is based on the propagation delay and ends reception of all or part of the signal of the DwPTS.
  • Special subframe settings can be selected so that they are not earlier than the timing.
  • the base station may indicate a special subframe configuration having a relatively long GP for a terminal having a large maximum propagation delay.
  • the base station may not instruct SRS transmission in the extended UpPTS of the special subframe to the terminal receiving the downlink in the DwPTS through the DCI. In addition, the base station may not instruct the SRS transmission in the extended UpPTS of the special subframe receiving the DwPTS for the terminal having a propagation delay of more than a predetermined value.
  • the base station may allocate an appropriate Timing Advance (TA) to the UE transmitting the SRS in the extended UpPTS of the special subframe receiving the downlink in the DwPTS.
  • TA Timing Advance
  • the base station may adjust the TA of the terminal so that the SRS transmission start timing in the extended UpPTS of the terminal is not earlier than the reception end timing of all or part of the signal of the DwPTS.
  • the base station may reduce the TA of a specific terminal or adjust the TA to have a negative value.
  • the uplink signal transmitted from the specific terminal may not coincide with the subframe boundary of the base station. That is, the base station may allow interference due to an uplink signal from a specific terminal.
  • Adjustment of the above-described TA value may be limitedly applied only to a specific special subframe.
  • the base station may indicate the TA value adjusted using higher layer signaling (eg, RRC signaling) or DCI.
  • the base station may track the TA of the terminal and set the reception of the DwPTS signal in the special subframe so as not to overlap with the transmission interval of the extended UpPTS. Therefore, the base station receives the DwPTS signal in the specific subframe to the terminal only when the SRS transmission start timing in the extended UpPTS of the terminal is not earlier than the reception termination timing of all or part of the signal of the DwPTS based on the TA of the terminal. And signal transmission of the extended UpPTS. For example, by tracking the TA, the base station can determine whether the actual transmission start time of the uplink signal in the extended UpPTS of the terminal is earlier than the reception end time of all or part of the signal of the DwPTS.
  • the base station When the actual transmission start time of the uplink signal in the extended UpPTS is earlier than the reception end time of the DwPTS signal, the base station receives the downlink signal of the DwPTS and the uplink signal of the extended UpPTS in the same special subframe for the corresponding UE. May not instruct transmission.
  • FIG. 13A is a flowchart of a method of transmitting a reference signal in a special subframe according to an embodiment.
  • the UE may receive a TDD UL-DL configuration indicating the location of the special subframe from the base station. For example, the terminal may determine the location of the special subframe based on the TDD UL-DL configuration. In addition, the terminal may receive a special subframe configuration indicating the configuration of the special subframe from the base station (S1301). As described above, the special subframe may be configured in the order of DwPTS, GP, and UpPTS.
  • the terminal may receive a downlink signal in the DwPTS of the special subframe.
  • the terminal may perform the following steps only when receiving a downlink signal.
  • the UE When transmission of a reference signal (eg, SRS) is scheduled in at least one first OFDM symbol located before UpPTS in a special subframe, the UE drops a reference signal transmission in the first OFDM symbol. It is determined whether or not (S1302).
  • the terminal may receive information for transmission of the SRS from the base station.
  • the information for transmission of the SRS may be received by the terminal through higher layer signaling (eg, RRC signaling).
  • the terminal may determine whether the reference signal is missing based on an indication from the base station. Also, for example, the terminal may determine whether a reference signal is missing based on a propagation delay. For example, the terminal may miss transmission of the SRS only if the scheduled SRS is a periodic SRS. In addition, the terminal may drop transmission of the reference signal when a signal is received from the base station in the DwPTS. In addition, the above-described determination of whether the reference signal transmission is omitted may be performed only when the downlink signal is received in the DwPTS of the special subframe.
  • 13B is a flowchart of a downlink signal reception method in a special subframe according to one embodiment.
  • the UE punctures at least a portion of the downlink signal received in the DwPTS. It is determined whether or not (S1352).
  • the terminal may be a terminal that receives a downlink signal corresponding to the DwPTS period based on the downlink control information.
  • the downlink signal received in the DwPTS may refer to a downlink signal transmitted by the base station in the DwPTS.
  • the terminal may determine whether to puncture the downlink signal based on the indication from the base station. Also, for example, the terminal may determine whether to puncture based on a propagation delay. For example, the UE may puncture at least a portion of the downlink signal only when the scheduled SRS is an aperiodic SRS. In addition, at least a portion of the punctured downlink signal may be a downlink signal except for a PDCCH or an EPDCCH.
  • FIG. 14 is a diagram for schematically describing a configuration of devices to which the embodiments of the present invention described with reference to FIGS. 1 to 13 may be applied as an embodiment of the present invention.
  • the first device 1400 and the second device 1450 may include radio frequency units (RF units) 1410 and 1460, processors 1420 and 1470, and optionally memories 1430 and 1480. have.
  • the first device 1400 and the second device 1450 may be a terminal and / or a base station.
  • Each Radio Frequency (RF) unit 1430, 1460 may include a transmitter 1411, 1461 and a receiver 1412, 1462, respectively. Each RF unit 1430, 1460 may be a transceiver.
  • the transmitter 1411 and receiver 1412 of the first device 1400 are configured to transmit and receive signals with the second device 4250 and other terminals, and the processor 1420 is a transmitter 1411 and receiver 1412. May be configured to control a process of transmitting and receiving a signal with other devices.
  • the first device 1400 and / or the second device 1450 may be a base station.
  • the processor 1420 may perform various processing on a signal to be transmitted, transmit the same to the transmitter 1411, and may perform processing on a signal received by the receiver 1412. If necessary, the processor 1420 may store information included in the exchanged message in the memory 1430.
  • the first device 1400 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 1400 may include various additional components according to the device application type.
  • the first device 1400 may include an additional configuration for measuring power, and the like, and the power measuring operation may be performed by the processor 1420. It may be controlled, or may be controlled by a separately configured processor (not shown).
  • the second device 1450 may be a base station.
  • the transmitter 1541 and the receiver 1462 of the base station are configured to transmit and receive signals with other base stations, servers, and devices, and the processor 1470 is functionally connected to the transmitter 1541 and the receiver 1462.
  • the transmitter 1462 and the receiver 1462 may be configured to control a process of transmitting and receiving a signal with other devices.
  • the processor 1470 may perform various processing on the signal to be transmitted, transmit the same to the transmitter 1541, and may perform processing on the signal received by the receiver 1462. If necessary, the processor 1470 may store information included in the exchanged message in the memory 1430.
  • the base station 1450 can perform the method of the various embodiments described above.
  • the processors 1420 and 1470 of the first device 1410 and the second device 1450 respectively indicate an operation (for example, control) in the first device 1410 and the second device 1450. , Coordination, management, etc.). Respective processors 1420 and 1470 may be connected to memories 1430 and 1480 that store program codes and data. The memories 1430 and 1480 are connected to the processors 1420 and 1470 to store operating systems, applications, and general files.
  • the processors 1420 and 1470 of the present invention may also be referred to as a controller, a microcontroller, a microprocessor, a microcomputer, or the like.
  • the processors 1420 and 1470 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

L'invention concerne un procédé pour prendre en charge un créneau temporel pilote de liaison montante (UpPTS) étendu dans une sous-trame spéciale. Un terminal, selon la présente invention, lorsqu'il est planifié pour recevoir un signal de liaison descendante dans un créneau temporel pilote de liaison descendante (DwPTS) et émettre un signal de référence dans un UpPTS étendu dans une sous-trame spéciale, peut perforer une partie du signal dans le DwPTS ou peut omettre une partie de l'émission du signal de référence dans l'UpPTS étendu.
PCT/KR2016/008885 2015-08-14 2016-08-12 Procédé permettant d'émettre ou de recevoir un signal dans une sous-trame spéciale et appareil associé WO2017030325A1 (fr)

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US201562205083P 2015-08-14 2015-08-14
US62/205,083 2015-08-14
US201562250511P 2015-11-04 2015-11-04
US62/250,511 2015-11-04
US201562254742P 2015-11-13 2015-11-13
US62/254,742 2015-11-13
US201562256132P 2015-11-17 2015-11-17
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