WO2014003313A1 - 물리적 상향링크 데이터 채널 맵핑정보 송수신 방법 및 그 단말 - Google Patents
물리적 상향링크 데이터 채널 맵핑정보 송수신 방법 및 그 단말 Download PDFInfo
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- WO2014003313A1 WO2014003313A1 PCT/KR2013/004233 KR2013004233W WO2014003313A1 WO 2014003313 A1 WO2014003313 A1 WO 2014003313A1 KR 2013004233 W KR2013004233 W KR 2013004233W WO 2014003313 A1 WO2014003313 A1 WO 2014003313A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
- H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
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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
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
- H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
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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
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0094—Indication of how sub-channels of the path are allocated
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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
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
Definitions
- the present invention relates to a wireless communication system in which a transmission and reception point and a terminal cooperate with each other.
- the closed loop precoding transmission method improves the gain of the received signal by adjusting the phase of the multiple antenna channels experienced by the received signal.
- the AMC method allows the transmitter to adjust the amount of data to be transmitted according to the channel condition. have.
- the channel sensitive scheduling resource management method increases the capacity of the system compared to allocating and serving a channel to one user because the transmitter selectively services a user having a good channel condition among multiple users.
- a closed loop precoding transmission method for example, a closed loop precoding transmission method, an AMC method, and a channel sensitive scheduling method are methods of applying appropriate precoding, modulation, and coding schemes at a time when it is determined to be the most efficient by receiving channel information from a receiver.
- OFDMA orthogonal frequency division multiple access
- the above-described closed loop precoding transmission method, AMC method, and channel sensitive scheduling method are techniques capable of improving transmission efficiency in a state where a transmitter acquires sufficient information about a transmission channel.
- the receiver When the transmitter cannot infer the state of the transmission channel through the reception channel as in the frequency division duplex (FDD) scheme, the receiver is designed to report information on the transmission channel to the transmitter.
- FDD frequency division duplex
- the effectiveness of a closed loop precoding transmission method, an AMC method, and a channel sensitive scheduling method may be degraded when reporting on the channel state is delayed.
- the wireless communication system uses a method of maintaining a call in such a manner that one base station manages a user in a certain area of coverage and hands over to another base station when the user moves out of coverage.
- an object of the present specification is to provide a method for transmitting and receiving physical uplink data channel mapping information and a terminal thereof in a wireless communication system.
- the present specification is a step of generating a physical uplink data channel mapping information of the transmission and reception point different from the transmission and reception point to which a specific terminal belongs in the transmission of the mapping information of the transmission and reception point and physical uplink
- a method for providing mapping information of a transmission / reception point comprising transmitting link data channel mapping information to a specific terminal.
- the present disclosure in the reception of the mapping information of the terminal, receiving physical uplink data channel mapping information of the transmission and reception point to and from other transmission point to which it belongs, physical uplink data channel mapping information
- the present invention provides a method of transmitting a physical uplink data channel, the method comprising: mapping a physical uplink data channel to a radio resource and transmitting a physical uplink data channel mapped to the radio resource to another transmission / reception point.
- the present disclosure is a terminal for transmitting a physical uplink data channel to a receiving point different from the transmitting and receiving point to which it belongs, the transmitting and receiving point to the physical uplink data channel mapping information of the other transmitting and receiving point
- a terminal including a reception unit received from the controller, a controller for mapping a physical uplink data channel to radio resources according to physical uplink data channel mapping information, and a transmitter for transmitting a physical uplink data channel mapped to radio resources to another transmission / reception point; to provide.
- 1 is a diagram illustrating a wireless communication system for performing cooperative communication.
- 2 and 3 illustrate an example of a method of transmitting a PUSCH, a DM-RS, and an SRS in uplink.
- FIG. 4 illustrates the ambiguity of PUSCH resource mapping according to cell-specific sounding reference signal configuration when the cell-specific sounding reference signal parameters of the transmitting point and the receiving point are different in uplink cooperative communication in FIG. 1. Illustrated.
- FIG. 5 is a flowchart illustrating a method for providing mapping information of a physical uplink data channel of a transmission / reception point and a physical uplink data channel transmission method of a terminal during uplink cooperative transmission according to an embodiment.
- FIG. 6 is a format of Downlink Control Information (DCI) including PUSCH mapping information of FIG. 5.
- DCI Downlink Control Information
- FIG. 7 is a block diagram of a transmission and reception point according to another embodiment.
- FIG. 8 is a block diagram of a terminal according to another embodiment.
- 1 is a diagram illustrating a wireless communication system for performing cooperative communication.
- the wireless communication system 100 to which the embodiments are applied is widely deployed to provide various communication services such as voice and packet data.
- the wireless communication system 100 includes at least one transmission / reception point 110, 120, or 122. Each transmit / receive point provides a communication service for a specific geographic area or frequency area, and may be called a site.
- Terminals 130, 132, 134 and 136 may be fixed or mobile, user equipment (UE), mobile terminal (MT), user terminal (UT), subscriber station (SS), wireless device (wireless device), personal digital assistant (PDA), wireless modem, wireless device (handheld device), etc. may be called.
- UE User Equipment
- MT mobile terminal
- UT user terminal
- SS subscriber station
- wireless device wireless device
- PDA personal digital assistant
- the transmission and reception points 110, 120, and 122 generally refer to a station communicating with the terminals 130, 132, 134, and 136, and may include a component carrier or a cell, an evolved-nodeb (eNodeB), and a base transceiver system (BTS). , Access Point, Femto eNodeB, Home Base Station (HeNodeB), Relay, Pico eNodeB, Remote radio head (hereinafter referred to as "RRH”) ), A hot spot, or a remote unit (RU).
- the transmission / reception points 110, 120, and 122 may be defined as a set of antenna ports.
- a plurality of transmission / reception points in one cell may be defined as a set of antenna ports. The intersection between a set of antenna ports is always an empty set.
- the cell should be interpreted in a comprehensive sense indicating some areas covered by the transmission / reception points 110, 120, and 122, and encompasses various coverage areas such as megacells, macrocells, microcells, picocells, and femtocells.
- the transmission / reception points 110, 120, and 122 may refer to a transmission point for transmitting a signal to provide a communication service, and may receive signals from the terminals 130, 132, 134, and 136 to provide a communication service. It may also mean a reception point for receiving.
- the transmission / reception point and the terminal are two transmission / reception subjects used to implement the technology or technical idea described in this specification, and are used in a comprehensive sense and are not limited by the terms or words specifically referred to.
- downlink means a communication or communication path from the transmission and reception point to the terminal
- uplink means a communication or communication path from the terminal to the transmission and reception point.
- CDMA Code Division Multiple Access
- TDMA Time Division Multiple Access
- FDMA Frequency Division Multiple Access
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier-FDMA
- OFDM-FDMA OFDM-TDMA
- various multiple access schemes such as OFDM-CDMA may be used.
- These modulation techniques demodulate signals received from multiple users of a communication system to increase the capacity of the communication system.
- the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme transmitted using different times or a frequency division duplex (FDD) scheme transmitted using different frequencies.
- TDD time division duplex
- FDD frequency division duplex
- LTE Long Term Evolution
- HSPA High Speed Packet Access
- CDMA Code Division Multiple Access-2000
- UMB Universal Mobile Broadband
- a coordinated multi-point transmission / reception system (CoMP system) or a cooperative multi-antenna in which two or more transmission / reception points 110 and 122 cooperate to transmit a signal It may be a coordinated multi-antenna transmission system or a cooperative multi-cell communication system.
- the CoMP system refers to a communication system supporting CoMP or a communication system to which CoMP is applied.
- CoMP is a technique for adjusting or combining signals transmitted or received by multiple transmission / reception points.
- CoMP can increase data throughput and provide high quality.
- the transmission / reception points 110, 120, and 122 may provide a service by allocating the same frequency resource at the same time when attempting cooperative transmission / reception to one terminal 134. That is, the transmission / reception points selected as cooperative transmission / reception points at the same time may transmit and receive data with one user terminal using the same frequency resource.
- Each transmission / reception point or cells may constitute multiple transmission / reception points.
- the multiple transmit / receive points may be macro cells forming a homogeneous network.
- the multiple transmit / receive points may be RRHs having a macro cell and high transmit power.
- the multiple transmission / reception points may be RRHs having low transmission power in the macro cell and the macro cell region.
- the CoMP system may selectively apply CoMP.
- a mode in which a CoMP system communicates using CoMP is called a CoMP mode, and a mode other than the CoMP system is called a normal mode or a non-CoMP mode.
- the terminals 132 and 134 of the terminals 130, 132, 134, and 136 may be CoMP terminals.
- the CoMP terminals 132 and 134 constitute a CoMP system and communicate with a CoMP cooperating set or a CoMP set.
- the CoMP terminals 132 and 134 may operate in the CoMP mode or in the normal mode similarly to the CoMP system.
- the CoMP set is a set of transmission / reception points that directly or indirectly participate in data transmission in a time-frequency resource for a CoMP terminal.
- the CoMP terminals 132 and 134 may apply a multi-user multi-antenna (MU-MIMO) scheme as well as a single-user multi-antenna (SU-MIMO) scheme.
- MU-MIMO multi-user multi-antenna
- SU-MIMO single-user multi-antenna
- Participating directly in data transmission or reception means that transmission / reception points actually transmit data to or receive data from a CoMP terminal in a corresponding time-frequency resource.
- Indirect participation in data transmission or reception means that the transmit / receive points do not actually transmit or receive data to or from the CoMP terminal in the corresponding time-frequency resource, but contribute to making a decision about user scheduling / beamforming. .
- the CoMP terminals 132 and 134 may simultaneously receive signals from the CoMP set or simultaneously transmit signals to the CoMP set. At this time, the CoMP system minimizes the interference effect between the CoMP sets in consideration of the channel environment of each cell constituting the CoMP set.
- the first CoMP scenario is CoMP, which is composed of a homogeneous network among a plurality of cells in one transmission / reception point, and may be referred to as intra-site CoMP.
- the second CoMP scenario is CoMP, which consists of a homogeneous network for one macro cell and one or more high-power RRHs.
- the third CoMP scenario and the fourth CoMP scenario are CoMPs that consist of a heterogeneous network for one macro cell and one or more low-power RRHs in the macro cell region. In this case, when the physical cell IDs of the RRHs are not the same as the physical cell IDs of the macro cells, they correspond to the third CoMP scenario and the same cases correspond to the fourth CoMP scenario.
- CoMP's categories include Joint Processing (JP) and Coordinated Scheduling / Beamforming (CS / CB). It is also possible to mix CS and CB.
- JP Joint Processing
- CS / CB Coordinated Scheduling / Beamforming
- JP Joint Transmission
- DPS Dynamic Point Selection
- DPS Dynamic Point Scheduling / Dynamic. point blanking
- the transmission / reception point may be changed for each subframe in consideration of interference.
- the data to be transmitted is simultaneously available at a plurality of transmission and reception points.
- DPS includes Dynamic Cell Selection (DCS).
- DCS Dynamic Cell Selection
- CS data is sent from one transmit / receive point in a CoMP set for time-frequency resources, and user scheduling is determined by coordination between the transmit and receive points of that CoMP set.
- CB it is determined by cooperation between the transmission and reception points of the corresponding CoMP set. By the CB (Coordinated Beamforming) it is possible to avoid the interference occurring between the terminals of the neighbor cell.
- the CS / CB may include a semi-static point selection (SSPS) that can be changed by selecting the transmission and reception points semi-statically.
- SSPS semi-static point selection
- some transmit / receive points in the CoMP set may transmit data to the target terminal according to JP, and other transmit / receive points in the CoMP set may perform CS / CB.
- Transmitting and receiving points to which the present specification is applied may include, for example, a base station (macro base station or micro base station (local base station)), a cell, or an RRH. Meanwhile, a plurality of base stations may be multiple transmission / reception points, and a plurality of RRHs may be multiple transmission / reception points. Of course, the operation of all the base station or RRH described in the present invention can be equally applied to other types of transmission and reception points.
- 2 and 3 illustrate a method of transmitting a physical uplink shared channel (PUSCH), a demodulation reference signal (DM-RS), and a sounding reference signal (SRS) in uplink; An example of this is shown. 2 and 3, the horizontal axis represents a symbol on the time axis, and the vertical axis represents a single resource block (RB) on the frequency axis.
- PUSCH physical uplink shared channel
- DM-RS demodulation reference signal
- SRS sounding reference signal
- a radio frame includes 10 subframes.
- One subframe includes two slots.
- the time (length) of transmitting one subframe is called a transmission time interval (TTI).
- TTI transmission time interval
- one subframe may have a length of 1 ms
- one slot may have a length of 0.5 ms.
- One slot may include a plurality of symbols in the time domain.
- the symbol in a wireless system using Orthogonal Frequency Division Multiple Access (OFDMA) in downlink (DL), the symbol may be an Orthogonal Frequency Division Multiplexing (OFDM) symbol.
- OFDM Orthogonal Frequency Division Multiplexing
- the representation of the symbol period in the time domain is not limited by the multiple access scheme or the name.
- the plurality of symbols in the time domain may be a Single Carrier-Frequency Division Multiple Access (SC-FDMA) symbol, a symbol interval, or the like in addition to the OFDM symbol.
- SC-FDMA Single Carrier-Frequency Division Multiple Access
- the number of OFDM symbols included in one slot may vary depending on the length of a cyclic prefix (CP). For example, in case of a normal CP, one slot may include 7 OFDM symbols, and in case of an extended CP, one slot may include 6 OFDM symbols.
- CP cyclic prefix
- a resource block is a resource allocation unit and includes a time-frequency resource corresponding to one slot on the time axis and 180 kHz on the frequency axis. For example, if one slot includes seven symbols on the time axis and 180 kHz on the frequency axis includes 12 subcarriers, one resource block may include 7 ⁇ 12 resource elements (REs). Can be.
- REs resource elements
- the resource element represents the smallest time-frequency unit to which a modulation symbol of a data channel or a modulation symbol of a control channel is mapped.
- the wireless communication system 100 it is necessary to estimate an uplink channel or a downlink channel for data transmission / reception, system synchronization acquisition, channel information feedback, and the like.
- the process of restoring a transmission signal by compensating for distortion of a signal caused by a sudden change in channel environment is called channel estimation.
- channel estimation it is also necessary to measure the channel state (channel state) for the cell to which the terminal belongs or other cells.
- a reference signal (RS) that is known between a terminal and a transmission / reception point is used for channel estimation or channel state measurement.
- the reference signal is generally transmitted by generating a signal from a sequence of reference signals.
- the reference signal sequence one or more of various sequences having excellent correlation characteristics may be used.
- ZC Zadoff-Chu
- CAZAC Constant Amplitude Zero Auto-Correlation
- PN pseudo-noise
- It may be used as a sequence of reference signals, and various other sequences having excellent correlation characteristics may be used depending on the system situation.
- the reference signal sequence may be cyclically extended or truncated to adjust the length of the sequence, and may be used in various forms such as binary phase shift keying (BPSK) or quadrature phase shift keying (QPSK). It may be modulated and mapped to a resource element (RE).
- BPSK binary phase shift keying
- QPSK quadrature phase shift keying
- RE resource element
- the uplink physical signal transmitted from the terminal to the transmission and reception point includes a DM-RS (DeModulation Reference Signal) for demodulation of the uplink physical channel, and a SRS (Sounding Reference Signal) for uplink channel state measurement.
- DM-RS Demodulation Reference Signal
- SRS Sounding Reference Signal
- the uplink DM-RS is associated with transmission of a physical uplink shared channel (PUSCH) or transmission of a physical uplink control channel (PUCCH), and is used for channel estimation for demodulation. Mainly sent.
- the uplink DM-RS is transmitted in every slot in every subframe in which a PUSCH or a PUCCH is transmitted.
- information on the DM-RS transmission bandwidth (BW) expressed in units of resource blocks is associated with PUSCH transmission or PUCCH transmission.
- BW DM-RS transmission bandwidth
- the DM-RS is transmitted in resource blocks to which a PUSCH is allocated.
- the resource block allocation information of the uplink DM-RS is based on the resource block allocation information of the PUSCH.
- the resource blocks allocated to the PUSCH for each terminal are based on a field value for resource block allocation of downlink control information (DCI).
- DCI downlink control information
- DCI has different uses according to its format, and fields defined in DCI are also different.
- Table 1 shows DCIs according to various formats.
- Table 1 DCI format Explanation 0 Used for scheduling PUSCH (Uplink Grant) One Used for scheduling one PDSCH codeword in one cell 1A Used for simple scheduling of one PDSCH codeword in one cell and random access procedure initiated by PDCCH command 1B Used for simple scheduling of one PDSCH codeword in one cell using precoding information 1C Used for brief scheduling of one PDSCH codeword and notification of MCCH change 1D Used for simple scheduling of one PDSCH codeword in one cell containing precoding and power offset information 2 Used for PDSCH scheduling for UE configured in spatial multiplexing mode 2A Used for PDSCH scheduling of UE configured in long delay CDD mode 2B Used in transmission mode 8 (double layer transmission) 2C Used in transmission mode 9 (multi-layer transmission) 3 Used to transmit TPC commands for PUCCH and PUSCH with power adjustment of 2 bits 3A Used to transmit TPC commands for PUCCH and PUSCH with single bit power adjustment 4 Used for scheduling of PUSCH (Uplink Grant).
- it is used for PUSCH scheduling for a terminal configured
- DCI format 0 is uplink scheduling information, format 1 for scheduling one PDSCH codeword, format 1A for compact scheduling of one PDSCH codeword, and very simple of DL-SCH.
- Format 1C for scheduling format 2 for PDSCH scheduling in closed-loop spatial multiplexing mode, format 2A for PDSCH scheduling in open-loop spatial multiplexing mode, and uplink channel Formats 3 and 3A for transmission of a transmission power control (TPC) command.
- DCI format 4 is used for scheduling a PUSCH, and is particularly used for PUSCH scheduling for a UE configured in a spatial multiplexing mode.
- Each field of the DCI is sequentially mapped to n information bits a0 to an-1. For example, suppose that DCI is mapped to information bits having a total length of 44 bits, each DCI field is sequentially mapped to a0 to a43.
- DCI formats 0, 1A, 3, and 3A may all have the same payload size.
- DCI formats 0 and 4 may be referred to as uplink grants.
- the uplink data channel (hereinafter referred to as "PUSCH") is transmitted in a region excluding the PUCCH and SRS regions of the system band.
- PUCCH includes ACK (Acknowledge) / NACK (Negative ACK) for HARQ (Hybrid Automatic Repeat reQuest) operation, RI (Rank Indicator), channel status information for downlink data scheduling, Precoding Matrix Indicator (PMI), and Channel Quality (CQI). Indication) information and the like
- the SRS is a signal for acquiring uplink channel information for each user and adjusting uplink transmission timing for the entire system.
- the feedback method of channel state information includes a method of periodically transmitting using PUCCH and a method of periodically transmitting using PUSCH allocated for feedback according to a request of a transmission / reception point.
- each terminal 130, 132, 134, and 136 may transmit a PUSCH to each terminal through a resource block indicated by an uplink grant of DCI format 0 or 4. have.
- the uplink DM-RS which is a reference signal used to demodulate the PUSCH transmitted by each of the terminals 130, 132, 134, and 136, is divided into two subframes in a resource block such as a PUSCH on a frequency axis and a time frame. It can be transmitted in one symbol of each slot.
- the UE 136 may use an uplink DM as shown in FIG. 2 for a modulated signal. -Maps sequentially from the lowest subcarrier to the frequency priority for the remaining resource elements except for the resource element (RE) allocated for RS.
- RE resource element
- each terminal 130, 132, 134, 136 is a user-specific for the DM-RS, a reference signal used to demodulate the PUSCH for uplink transmission and a part of the system full-band or full-band
- a sounding reference signal (SRS), which is a signal for obtaining uplink channel information and adjusting uplink transmission timing, is transmitted.
- SRS transmitted by each terminal 130, 132, 134, 136 may be transmitted in the last symbol of the corresponding subframe.
- FIG. 4 illustrates the ambiguity of PUSCH resource mapping according to cell-specific sounding reference signal configuration when the cell-specific sounding reference signal parameters of the transmitting point and the receiving point are different in uplink cooperative communication in FIG. 1. Illustrated.
- the terminal 130 transmits downlink from the first transmission point 110, for example, a downlink physical channel and a downlink.
- Receives a physical signal and transmits an uplink transmission, for example, an uplink physical channel and a physical signal, to the first transmission / reception point 110.
- a macro cell for example, a first transmission / reception point ( 110), for example, a study on a heterogeneous network and a CoMP scenario in which second transmission and reception points 120, 122, for example, RRHs form respective small cells, overlapping with a macro cell by an eNB It's going on.
- CoMP scenario 4 in which eNB 110 and each RRHs 120 and 122 use the same cell ID
- CoMP scenario 3 in which eNB 110 and each RRHs 120 and 122 use different cell IDs.
- definitions of various cooperative communication technologies and signaling for supporting the same have been actively made.
- a downlink / uplink coverage mismatch occurs due to a difference in cell size between a high power cell (large cell such as a macro cell) and a low power cell (small cell such as a pico / micro cell). That is, a case in which an uplink channel quality and geometry with a second transmission / reception point other than the corresponding transmission / reception point other than the corresponding transmission / reception point is often superior to any terminal having the best downlink channel quality of any first transmission / reception point. do.
- the downlink physical channel and the signal are received from the first transmit / receive point, and the uplink physical channel and the signal are transmitted to the second transmit / receive point, that is, the transmit / receive as a transmit point. It is possible to take the transmission and reception points as points and reception points differently. To this end, some modifications to the uplink physical channel transmission method are required, unlike the case of the same transmission / reception point.
- each of the terminals 130, 132. 134, and 136 receives downlink transmissions from specific transmission / reception points 110, 120, and 122, and the terminals 130, 132. 134, and 136.
- Some terminals 132 and 134 are not the transmit / receive point 110 that receives the downlink transmission, but are upward to the transmit / receive point 110 and other transmit / receive points 120 and 122 having better channel quality and geometry.
- Link channels and signals may be transmitted.
- the cell-specific sounding reference signal parameter is set by the system information of the transmission / reception point as transmission points, and the actual physical uplink data channel transmission.
- the physical uplink data channel resource mapping rule according to the cell-specific sounding reference signal configuration is ambiguous ( ambiguity) may occur.
- the terminal 134 transmits the downlink transmission as the transmitting point.
- the cell-specific sounding reference signal when the cell-specific sounding reference signal parameters of the transmitting point, the transmitting point and the receiving point, are different from each other when uplink transmission to the transmitting / receiving point 122 that is the receiving point.
- Ambiguity may occur in a PUSCH resource mapping rule according to a configuration.
- the first transmission and reception point 110 when one terminal 134 belonging to the first transmission and reception point 110 performs the uplink data signal transmission of the specific resource block 440 to the second transmission and reception point 122, the first transmission and reception point 110. If the specific resource block 440 is not set to the cell-specific sounding reference signal transmission region according to the cell-specific sounding reference signal configuration information received from the UE, the UE 134 allocates the allocated resource block 440.
- the PUSCH mapping for the transmission of the corresponding data signal is performed up to the last symbol.
- the corresponding area is set as the cell-specific sounding reference signal transmission area by the second transmission / reception point 122, and accordingly, the specific terminal 136 existing in the second transmission / reception point cell coverage corresponds to the corresponding resource block 445.
- the sounding reference signal is transmitted using the last symbol of, the collision between the PUSCH and the SRS may occur at the last symbol 450 of the corresponding subframe based on the second transmission / reception point 122.
- FIG. 5 is a flowchart illustrating a method for providing mapping information of a physical uplink data channel of a transmission / reception point and a physical uplink data channel transmission method of a terminal during uplink cooperative transmission according to an embodiment.
- a specific terminal receives a transmission / reception point, for example, a transmission / reception point different from the first transmission / reception point 110, for example, a second transmission / reception point 122.
- a first transmission / reception point 110 as a transmission point is uplink physical data channel mapping information of a second transmission / reception point 122 as a reception point of a specific terminal 134. (PUSCH mapping information) is generated (S510).
- the PUSCH mapping information may be a cell-specific SRS parameter of the second transmission / reception point 122 that is a reception point.
- the cell-specific SRS parameter of the second transmission / reception point 122 includes SRS subframe configuration information and SRS bandwidth configuration information.
- the SRS subframe configuration information may represent a cell-specific SRS transmittable subframe using a period T SFC and an offset ⁇ SFC .
- Tables 2 and 3 show cell-specific SRS transmittable subframes defined in frequency division duplex (FDD) and time division duplex (TDD) and offset (T SFC ), respectively. It is an example of SRS subframe configuration information expressed by ( ⁇ SFC ).
- the total number of possible cases of the SRS subframe configuration information may be represented by 16 bits in 4 bits.
- the value of srs-SubframeConfig is 7 (0111)
- the period (T SFC ) is 5
- the offset ( ⁇ SFC ) is ⁇ 0, 1 ⁇ .
- SRS is transmitted in the second subframe.
- the SRS band configuration information is information on a resource block (RB) through which the SRS is transmitted.
- the SRS band configuration information includes the total number of cell-specific resource blocks that can be used by a cell and the number and location of resource blocks allocated to each terminal among cell-specific resource blocks.
- all of the cell-specific resource blocks that the cell can use are specific resource blocks that are signaled among resource blocks corresponding to the total system bandwidth (BW). For example, if the system bandwidth is 50 resource blocks and the number of resource blocks signaled is 48, then 48 resource blocks of the total 50 resource blocks become cell-specific all used resource blocks.
- Table 4 is an example of SRS band configuration information when the system bandwidth is 40 to 60 resource blocks.
- the total number of cell-specific resource blocks used may be transmitted as a parameter value called C SRS .
- the number of resource blocks used for each UE among cell-specific resource blocks may be defined by a parameter called B SRS .
- B SRS a parameter used for example, in Table 4, if the C SRS is 1 and the B SRS is 2, the number of cell-specific resource blocks (m SRS, 0 ) used for the entire SRS transmission is 48 and the resource blocks used for the specific UE are 48.
- the number of m (S SRS, 2 ) is eight.
- n RRC may be defined to represent the location of the resource block used for each terminal.
- C SRS , B SRS , n RRC may be transmitted through higher layer signaling (eg, Radio Resource Control; RRC).
- RRC Radio Resource Control
- the PUSCH mapping information may be information indicating whether the PUSCH resource is mapped to the last SC-FDMA symbol of the uplink resource block.
- the PUSCH mapping information is included in a DCI format corresponding to an uplink grant, which is resource allocation information for the PUSCH transmitted to the second transmission / reception point 122, which is a reception point, and the last SC-FDMA symbol. It may be a specific number of bits indicating, for example, whether to map a PUSCH resource for a 1-bit indication field.
- Table 5 is an example of a specific number of bits indicating a PUSCH resource mapping for the last SC-FDMA symbol, for example, a 1 bit indication field.
- information indicating whether the first transmission / reception point 110 to which the terminal belongs is different from the second transmission / reception point 122 as a reception point (information indicating uplink cooperative communication) or different from the first transmission / reception point 110.
- Information used to set the second transmission / reception point 122 as a reception point may be indirectly used as PUSCH mapping information.
- the information used to set the second transmission / reception point 122 different from the first transmission / reception point 110 as a reception point may be a virtual cell identity.
- the type of C-RNTI used for calculating a cyclic redundancy check (CRC) attached to a DCI indicating an uplink grant for PUSCH resource allocation of a corresponding UE indicates whether the PUSCH resource is mapped to the last SC-FDMA symbol. It can be used as PUSCH mapping information.
- CRC cyclic redundancy check
- DCI with a CRC calculated with a C-RNTI different from a C-RNTI allocated at initial entry may be used as PUSCH mapping information indirectly.
- the first C-RNTI or the second C-RNTI according to whether the PUSCH resource can be mapped to the last SC-FDMA symbol.
- the CRC attached to the DCI indicating the corresponding uplink grant may be calculated using.
- the first C- attaches the CRC attached to the DCI indicating the uplink grant. Can be calculated using RNTI.
- the first transmission / reception point 110 indicates to apply resource mapping for PUSCH transmission to the remaining symbols except for the last symbol of the SC-FDMA
- the first C-reception point 110 attaches a CRC attached to the DCI indicating the uplink grant to the second C-. Can be calculated using RNTI.
- the first transmission and reception point 110 transmits the PUSCH mapping information to the terminal 134 (S520).
- the terminal 134 receives the PUSCH mapping information from the first transmission / reception point 110 in step S520.
- the first transmission / reception point 110 transmits the PUSCH mapping information to the terminal 134.
- the transmission point in step S520.
- the first transmission / reception point 110 transmits the cell-specific SRS parameter of the second transmission / reception point 122, which is a reception point, for the corresponding terminal through UE-specific higher layer signaling. Can be sent to.
- the aforementioned UE-specific higher layer signaling may be UE-specific RRC including cell-specific parameters of SoundingRS-UL-ConfigDedicated.
- the SoundingRS-UL-ConfigDedicated may include srs-SubframeConfig, which is SRS subframe configuration, and srs-BandwidthConfig, which is SRS bandwidth configuration, as shown in Table 6.
- srs-subframe Config which is SRS subframe configuration information
- sc0 corresponds to a value of 0 in Table 2 (FDD) and Table 3 (TDD)
- sc1 corresponds to a value of 1 in Table 2 and Table 3.
- Sc2 to sc15 correspond to 2 to 15 in Table 2 and Table 3.
- srs-BandwidthConfig which is SRS bandwidth configuration information
- bw0 corresponds to the value 0 in Table 4
- bw1 corresponds to the value 1 in Table 4.
- Bw2 to bw7 correspond to 2 to 7 in Table 4.
- the first transmission / reception point 110 may indicate a DCI format indicating an uplink grant, for example, DCI format 0 or S520.
- This indication field may be included in 4 and the DCI format may be transmitted to the terminal 134 through the PDCCH or the ePDCCH.
- the ePDCCH means a physical downlink control channel allocated to the data region rather than the control region of the subframe.
- the physical downlink control channel includes not only a PDCCH allocated to a control region of a subframe but also an ePDCCH allocated to a data region.
- FIG. 6 is a format of Downlink Control Information (DCI) including PUSCH mapping information of FIG. 5.
- DCI Downlink Control Information
- the DCI format 0 600 when the DCI format indicating the uplink grant is DCI format 0, as illustrated in FIG. 6, the DCI format 0 600 includes an indicator field, a hopping indication field, and a redundancy version that distinguish DCI formats 0 and 1A included. It may include an indication field 610 indicating whether PUSCH resource mapping of Table 5 together with a modulation and coding method field, a new data indicator field, an uplink indicator field, a DM-RS phase rotation field, and a CQI request field. have.
- the first transmission / reception point 110 indicates whether the transmission / reception point 122 different from the first transmission / reception point 110 to which the UE belongs is set as the reception point.
- PUSCH mapping information may be indirectly transmitted to the terminal 134 by transmitting the information or information used to set the second transmission / reception point 122 different from the first transmission / reception point 110 as a reception point to the terminal 134.
- the first transmission / reception point 110 is virtual.
- the cell ID may be transmitted to the UE 134 through higher layer signaling, for example, RRC signaling or a physical downlink control channel (PDCCH or ePDCCH).
- the terminal 134 uses a virtual cell ID received through higher layer signaling, for example, RRC signaling or PDCCH or ePDCCH, to select a second transmission / reception point 110 different from the first transmission / reception point 110.
- this virtual cell ID can be used as the PUSCH mapping information.
- the first transmission / reception point 110 transmits a DCI format with a CRC calculated using the first C-RNTI to the terminal 134 through the PDCCH, or a DCI with a CRC calculated using the second C-RNTI.
- PUSCH resource mapping information may be implicitly transmitted to the terminal 134 by transmitting the format to the terminal 134 through the PDCCH.
- Cyclic Redundancy Check (CRC) is attached to each DCI payload, and bits that scramble the DCI message payload with this CRC with C-RNTI to identify the terminal are tail-biting convolutional codes (Tail). Coded with Bit Convolutional Code, it may be matched with the amount of resources used for physical downlink control channel (PDCCH) transmission through rate matching.
- PDCH physical downlink control channel
- the DCI format indicating the uplink grant may be DCI format 0 or 4, for example.
- the DCI format used as PUSCH mapping information indicating whether the PUSCH resource is mapped to the last SC-FDMA symbol according to the type of C-RNTI used may be DCI format 4 in which the DCI size is not the same as other DCI formats.
- the reason is to reduce blind decoding complexity of the UE.
- blind decoding performed by a UE is performed in a terminal-specific search space (USS) with an AL (aggregation level) 1 of 6 times, an AL (aggregation level) 2 of 6, an AL (aggregation level) 4 of 2, and an AL ( aggregation level 8 is 2.
- blind decoding should be performed on a DCI format (eg, DCI format 2C) according to a PDSCH TM (Transmission Mode). Basically, regardless of PDSCH TM, blind decoding should always be performed for DCI format 0 / 1A because it is a fallback DCI format.
- DCI format 0 is a DCI format corresponding to an uplink grant
- DCI format 1A is a DCI format corresponding to downlink scheduling. Both sizes are the same and cannot be detected by one blind decoding.
- DCI format 0 corresponding to an uplink grant or DCI format 1A corresponding to downlink scheduling corresponds to DCI format 0 and 1A of 1 bit in Table 5 of the corresponding PDCCH.
- This can be identified through the indicator field. Therefore, in fact, the UE performs 32 blind decoding times in total by DCI format 16 (6 + 6 + 2 + 2) + fallback DCI format 16 according to PDSCH TM, respectively. Meanwhile, if the newly defined PUSCH TM 2 is configured, 16 blind decoding operations are performed on the DCI format 4 additionally in the corresponding USS, so that 48 blind decoding operations are performed.
- DCI format 4 which corresponds only to an uplink grant, rather than DCI format 0 having the same size as DCI format 1A, is used for the type of C-RNTI. Accordingly, it may be used as PUSCH mapping information indicating whether PUSCH resource is mapped to the last SC-FDMA symbol.
- the terminal 134 After receiving the PUSCH mapping information of the above-described examples in step S520, the terminal 134 maps the PUSCH resource to the resource block as shown in FIG. 2 or 3 according to the PUSCH mapping information (S530).
- step S520 the terminal 134 that has received the cell-specific SRS parameter of the second transmission / reception point 122, which is a reception point, through UE-specific higher layer signaling, is the first transmission / reception point that is a transmission point. Flushing cell-specific SRS subframe / band configuration information included in the cell-specific SRS parameter received through SIB2 of 110 and through UE-specific higher layer signaling. The cell-specific SRS subframe / band configuration information included in the cell-specific SRS parameter of the second transmission / reception point 122 which is the received reception point is reconfigured.
- the terminal 134 that has received the cell-specific SRS parameter of the second transmit / receive point 122 may receive a cell-cell included in the cell-specific SRS parameter received through the system information block 2 (SIB2) of the first transmit / receive point 110.
- SIB2 system information block 2
- PUSCH based on reconfiguration information of cell-specific SRS subframe / band included in cell-specific SRS parameter of second transmission / reception point 122 instead of PUSCH resource mapping rule applied based on specific SRS subframe / band configuration information. Apply resource mapping rules.
- the last SC-FDMA symbol when the PUSCH resource allocation overlapped with the cell-specific SRS subframe / band included in the cell-specific SRS parameter of the newly reset second transmit / receive point 122 is made. And modulated signals are mapped using the frequency-first mapping method on the remaining resource elements except for the SC-FDMA symbol used as the DM-RS.
- the terminal 134 reset to the cell-specific SRS parameter of the second transmission / reception point 134 consequently 10 for 20RB.
- a modulated signal is mapped in a frequency-priority mapping scheme to other resource elements except for the last SC-FDMA symbol and the SC-FDMA symbol used as DM-RS in a period of 5 subframes for 40RB.
- the UE 134 may determine the corresponding 1-bit indication field 610 of Table 5 of the DCI format corresponding to the uplink grant.
- the PUSCH resource is not mapped or the PUSCH resource is mapped to the last SC-FDMA symbol of the corresponding band of the uplink subframe indicated by the uplink grant according to the on / off setting value.
- the UE 134 configured for SRS based on the cell-specific SRS parameter received through the SIB2 of the first transmission / reception point 110 may have a DCI format corresponding to an uplink grant, for example, a table of DCI format 0 or 4 If the setting value of the indication field 610 of the corresponding 1 bit of 5 is on, the PUSCH resource is mapped to the last SC-FDMA symbol of the corresponding band of the subframe indicated by the uplink grant, and if the setting value is off, the uplink grant PUSCH resources are not mapped to the last SC-FDMA symbol of the corresponding band of the subframe indicated by.
- PUSCH transmission that is not based on an uplink grant, such as retransmission by HARQ NACK or PUSCH transmission by Semi Persistent Scheduling (SPS)
- SPS Semi Persistent Scheduling
- a setting value included in an initial transmission or an uplink grant for transmission before retransmission May be equally applied to PUSCH transmissions not based on the associated uplink grants, or the PUSCH resources may be mapped so as not to use the last SC-FDMA symbol for all PUSCH transmissions based on the uplink grants.
- the UE 134 when receiving an uplink grant through a PDCCH of a downlink subframe before 4 subframes, the UE 134 performs PUSCH transmission through the corresponding subframe.
- synchronous non-adaptive retransmission is basically applied to PUSCH for PUSCH retransmission due to a reception failure of a transmission / reception point that is a reception point instead of the first PUSCH transmission. For example, if a certain UE receives an uplink grant in downlink subframe # 0 and the first PUSCH transmission is performed in uplink subframe # 4 based on this, if the corresponding PUSCH decoding fails at the corresponding transmission / reception point, the downlink NACK is transmitted through PHICH of link subframe # 8.
- the UE does not receive an uplink grant for retransmission separately from the PDCCH of the corresponding downlink subframe # 8
- the UE initially transmits the corresponding PUSCH in the uplink subframe # 12, that is, the subframe # 2 of the next radio frame.
- SPS Semi Persistent Scheduling
- the same configuration value included in the uplink grant for the initial transmission or the transmission before retransmission is equally applied to the PUSCH transmission not based on the associated uplink grant, or all the PUSCH transmissions are not based on the uplink grant.
- PUSCH resources may be mapped so as not to use the last SC-FDMA symbol for.
- the PUSCH resource mapping rule for PUSCH transmission may be newly redefined. For example, resource elements allocated for DM-RS and resource elements corresponding to the last SC-FDMA symbol for resource block (s) allocated for corresponding PUSCH transmission according to the PUSCH resource mapping rule of the UE. PUSCH resources may be mapped to the elements in a frequency-first manner.
- the terminal follows the existing PUSCH resource mapping rule, and when the transmission point and the reception point are different transmission / reception points, the UE performs the corresponding PUSCH transmission according to the new PUSCH resource mapping rule.
- the PUSCH resource may be mapped in a frequency-first manner with respect to the resource blocks allocated for the DM-RS except for the resource elements allocated for the DM-RS and resource elements corresponding to the last SC-FDMA symbol. .
- the terminal 134 receiving the used information may configure the cell-specific SRS subframe / band included in the cell-specific SRS parameter received through the SIB2 of the first transmission / reception point 110.
- PUSCH resources may be mapped in a frequency-first manner with respect to the remaining resource elements except for the corresponding resource elements.
- the PUSCH resource for the last SC-FDMA symbol is the type of C-RNTI (type of C-RNTI used for CRC generation) used to calculate a CRC attached to a DCI indicating an uplink grant for PUSCH resource allocation of a corresponding UE.
- C-RNTI type of C-RNTI used for CRC generation
- a terminal allocated an additional second C-RNTI separately from the first C-RNTI is upward when performing blind decoding on the UE-specific search space or common search space of the PDCCH.
- additional blind decoding is performed based on the newly allocated second C-RNTI. do.
- the UE when receiving the DCI using the first C-RNTI, the UE applies the PUSCH resource mapping for the PUSCH transmission allocated using the last symbol of the SC-FDMA, and receives the DCI using the second C-RNTI.
- the UE applies PUSCH resource mapping for PUSCH transmission to the remaining symbols except for the last symbol of SC-FDMA.
- the setting value included in the uplink grant for the initial transmission or the transmission before the retransmission is equally applied to the PUSCH transmission which is not based on the related uplink grant or is not based on all the uplink grants.
- PUSCH resources may be mapped so as not to use the last SC-FDMA symbol for the PUSCH transmission.
- the terminal 134 performs uplink transmission including the PUSCH mapped to the resource block in step S530 to the second transmission / reception point 122 that is the reception point (S540).
- FIG. 7 is a block diagram of a transmission and reception point according to another embodiment.
- the transmission / reception point 700 includes a controller 710, a transmitter 720, and a receiver 730.
- the control unit 710 controls the operation of the overall transmission and reception point according to the CoMP operation and uplink reference signal transmission necessary to carry out the above-described present invention.
- the transmitter 720 and the receiver 730 are used to transmit and receive signals, messages, and data necessary for carrying out the above-described present invention.
- the control unit 710 is uplink physical data channel mapping information (PUSCH mapping information) of the other transmission and reception point that is the reception point of the specific terminal in uplink cooperative communication in which a specific terminal transmits a physical uplink data channel to another reception point.
- PUSCH mapping information uplink physical data channel mapping information
- the PUSCH mapping information may be a cell-specific SRS parameter of another transmission / reception point that is a reception point.
- the cell-specific SRS parameter of another transmission / reception point includes SRS subframe configuration information and SRS bandwidth configuration information.
- the cell-specific SRS parameter of the other transmission / reception point may be transmitted through higher layer signaling (eg, Radio Resource Control (RCR)) in the transmitter 720.
- RCR Radio Resource Control
- the PUSCH mapping information may be information indicating whether the PUSCH resource is mapped to the last SC-FDMA symbol of the uplink resource block.
- the PUSCH mapping information is included in a DCI format corresponding to an uplink grant, which is resource allocation information about a PUSCH transmitted to another transmission / reception point that is a reception point, and the PUSCH resource for the last SC-FDMA symbol. It may be a specific number of bits indicating whether to map, for example, a 1-bit indication field.
- information indicating whether another transmission point is set as a reception point (information indicating uplink cooperative communication) or information used to set another transmission point as a reception point may be indirectly used as PUSCH mapping information.
- the information used to set another transmission / reception point as a reception point may be a virtual cell identity.
- the type of C-RNTI used for calculating a cyclic redundancy check (CRC) attached to a DCI indicating an uplink grant for PUSCH resource allocation of a corresponding UE indicates whether the PUSCH resource is mapped to the last SC-FDMA symbol. It can be used as PUSCH mapping information.
- CRC cyclic redundancy check
- DCI with a CRC calculated with a C-RNTI different from a C-RNTI allocated at initial entry may be used as PUSCH mapping information indirectly.
- the RNTI is allocated and uplink transmission for PUSCH resource allocation of the corresponding UE, the corresponding uplink grant using the first C-RNTI or the second C-RNTI according to whether the PUSCH resource can be mapped to the last SC-FDMA symbol
- the CRC attached to the DCI indicating may be calculated.
- the controller 710 uses the first C-RNTI as a CRC attached to a DCI indicating an uplink grant when instructing to apply resource mapping for the allocated PUSCH transmission using the last symbol of the SC-FDMA. Can be calculated.
- the first transmission / reception point 110 indicates to apply resource mapping for PUSCH transmission to the remaining symbols except for the last symbol of the SC-FDMA
- the first C-reception point 110 attaches a CRC attached to the DCI indicating the uplink grant to the second C-. Can be calculated using RNTI.
- the transmitter 720 transmits the PUSCH mapping information to the terminal.
- the transmitter 720 transmits the PUSCH mapping information to the terminal 134.
- the transmitter 720 may transmit information about the UE.
- the cell-specific SRS parameter of another transmission / reception point, which is a reception point, may be transmitted to the terminal 134 through UE-specific higher layer signaling.
- the aforementioned UE-specific higher layer signaling may be UE-specific RRC including cell-specific parameters of SoundingRS-UL-ConfigDedicated.
- the SoundingRS-UL-ConfigDedicated may include srs-subframeConfig, which is SRS subframe configuration information, and srs-BandwidthConfig, which is SRS bandwidth configuration information.
- the transmitter includes this indication field in a DCI format indicating a UL grant, for example, DCI format 0 or 4,
- the DCI format may be transmitted to the terminal 134 through the PDCCH or the ePDCCH.
- the ePDCCH means a physical downlink control channel allocated to the data region rather than the control region of the subframe.
- the physical downlink control channel includes not only a PDCCH allocated to a control region of a subframe but also an ePDCCH allocated to a data region.
- the transmitter 720 sets another transmission point as a reception point.
- Information indicating whether or not, or information used to set another transmission point as a reception point is transmitted to the terminal, thereby indirectly transmitting PUSCH mapping information to the terminal.
- the transmitter 720 transmits the virtual cell ID to upper layer signaling, for example, RRC. It can be transmitted to the terminal through signaling or a physical downlink control channel (PDCCH or ePDCCH).
- the UE sets another transmission / reception point as a reception point by using a virtual cell ID received through higher layer signaling, for example, RRC signaling or PDCCH or ePDCCH, and sets the virtual cell ID to PUSCH mapping information.
- RRC physical downlink control channel
- ePDCCH physical downlink control channel
- the transmitter 720 transmits a DCI format with a CRC calculated using the first C-RNTI to the terminal through the PDCCH or a DCI format with a CRC calculated using the second C-RNTI through the PDCCH.
- the PUSCH resource mapping information may be implicitly transmitted to the terminal.
- the receiver 730 receives an uplink physical channel and a physical signal from the terminal.
- FIG. 8 is a block diagram of a terminal according to another embodiment.
- the terminal includes a receiver 810, a controller 820, and a transmitter 830.
- the control unit 820 controls the overall operation of the UE according to the CoMP operation and the transmission of the uplink reference signal required to perform the above-described present invention.
- the transmitter 830 and the receiver 810 are used to transmit and receive a signal, a message, and data necessary for carrying out the above-described present invention.
- the receiver 810 receives the cell-specific SRS parameter of the second transmission / reception point, which is a reception point, through UE-specific higher layer signaling. Thereafter, the controller 820 flushes the cell-specific SRS subframe / band configuration information included in the cell-specific SRS parameter received through the SIB2 of the first transmission point, which is a transmission point, and performs UE-specific higher layer signaling.
- the controller 820 may include a cell included in the cell-specific SRS parameter received through the system information block 2 (SIB2) of the first transmission / reception point.
- SIB2 system information block 2
- PUSCH resource mapping based on reconfiguration information of cell-specific SRS subframes / bands included in cell-specific SRS parameters of a second transmit / receive point instead of PUSCH resource mapping rules applied based on specific SRS subframe / band configuration information. Apply the rules.
- the UE When the PUSCH mapping information is the 1-bit indication field of Table 5 described above, the UE is set to the on / off setting value of the 1-bit indication field of Table 5 of the DCI format corresponding to the uplink grant. Accordingly, the PUSCH resource or the PUSCH resource is not mapped to the last SC-FDMA symbol of the corresponding band of the uplink subframe indicated by the uplink grant.
- the controller 820 may control the DCI format corresponding to the uplink grant, for example, Table 5 of DCI format 0 or 4 If the setting value of the indication field of the corresponding 1-bit of is on, the PUSCH resource is mapped to the last SC-FDMA symbol of the corresponding band of the subframe indicated by the uplink grant, and if the setting value is off, the sub-point indicated by the uplink grant The PUSCH resource is not mapped to the last SC-FDMA symbol of the corresponding band of the frame.
- PUSCH transmission that is not based on an uplink grant, such as retransmission by HARQ NACK or PUSCH transmission by Semi Persistent Scheduling (SPS)
- SPS Semi Persistent Scheduling
- a configuration value included in an initial transmission or an uplink grant for transmission before retransmission May be equally applied to PUSCH transmissions not based on the associated uplink grants, or the PUSCH resources may be mapped so as not to use the last SC-FDMA symbol for all PUSCH transmissions based on the uplink grants.
- the configuration value included in the uplink grant for the initial transmission or the transmission before retransmission is equally applied to the PUSCH transmission not based on the associated uplink grant, or all the PUSCH transmissions are not based on the uplink grant.
- PUSCH resources may be mapped so as not to use the last SC-FDMA symbol for.
- PUSCH mapping information Information indicating whether a transmission point different from the first transmission / reception point to which the terminal belongs is set as a reception point, or information used to set a second transmission / reception point different from the first transmission / reception point as a reception point is indirectly used as PUSCH mapping information.
- a PUSCH resource mapping rule for PUSCH transmission may be newly redefined. For example, resource elements allocated for DM-RS and resource elements corresponding to the last SC-FDMA symbol for resource block (s) allocated for corresponding PUSCH transmission according to the PUSCH resource mapping rule of the UE.
- PUSCH resources may be mapped to the elements in a frequency-first manner.
- the controller 820 follows the existing PUSCH resource mapping rule, and when the transmission point and the reception point are different transmission and reception points, the corresponding PUSCH is transmitted according to the new PUSCH resource mapping rule.
- the PUSCH resource may be mapped in a frequency-first manner with respect to resource blocks allocated for the DM-RS except for those allocated for DM-RS and resource elements corresponding to the last SC-FDMA symbol. have.
- the control unit 820 is a new PUSCH instead of the PUSCH resource mapping rule applied based on the cell-specific SRS subframe / band configuration information included in the cell-specific SRS parameters received through the SIB2 of the first transmission and reception point
- Frequency priority for the remaining resource elements except for those allocated for DM-RS and those for the last SC-FDMA symbol for the resource block (s) allocated for the corresponding PUSCH transmission according to the resource mapping rule PUSCH resources may be mapped in a manner.
- the control unit 820 determines that the type of C-RNTI (type of C-RNTI used to generate the CRC) used to calculate a CRC attached to a DCI indicating an uplink grant for PUSCH resource allocation of a corresponding terminal is the last SC-FDMA.
- the type of C-RNTI type of C-RNTI used to generate the CRC
- a CRC attached to a DCI indicating an uplink grant for PUSCH resource allocation of a corresponding terminal is the last SC-FDMA.
- PUSCH mapping information indicating whether a PUSCH resource is mapped to a symbol
- an additional second C-RNTI is allocated separately from the first C-RNTI, and blind decoding of a UE-specific search space or a common search space of the PDCCH is performed.
- the blind decoding based on the first C-RNTI for the DCI format corresponding to the uplink grant for example, DCI format 0 or 4, and additionally based on the newly allocated second C-RNTI.
- the UE when receiving the DCI using the first C-RNTI, the UE applies the PUSCH resource mapping for the PUSCH transmission allocated using the last symbol of the SC-FDMA, and receives the DCI using the second C-RNTI.
- the UE applies PUSCH resource mapping for PUSCH transmission to the remaining symbols except for the last symbol of SC-FDMA.
- the setting value included in the uplink grant for the initial transmission or the transmission before the retransmission is equally applied to the PUSCH transmission which is not based on the related uplink grant or is not based on all the uplink grants.
- PUSCH resources may be mapped so as not to use the last SC-FDMA symbol for the PUSCH transmission.
- the transmitter 830 performs uplink transmission including a PUSCH mapped to a resource block in the controller 820 as a second transmission / reception point that is a reception point.
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Abstract
Description
DCI 포맷 | 설 명 |
0 | PUSCH(상향링크 그랜트)의 스케줄링에 사용 |
1 | 1개 셀에서의 1개의 PDSCH 코드워드(codeword)의 스케줄링에 사용됨 |
1A | 1개 셀에서의 1개의 PDSCH 코드워드의 간략한 스케줄링 및 PDCCH 명령에 의해 초기화되는 랜덤 액세스 절차에 사용됨 |
1B | 프리코딩 정보를 이용한 1개 셀에서의 1개의 PDSCH 코드워드의 간략한 스케줄링에 사용됨 |
1C | 1개의 PDSCH 코드워드의 간략한 스케줄링 및 MCCH 변경의 통지를 위해 사용됨 |
1D | 프리코딩 및 전력 오프셋 정보를 포함하는 1개 셀에서의 1개의 PDSCH 코드워드의 간략한 스케줄링에 사용됨 |
2 | 공간 다중화 모드로 구성되는 단말에 대한 PDSCH 스케줄링에 사용됨 |
2A | 긴 지연(large delay)의 CDD모드로 구성된 단말의 PDSCH 스케줄링에 사용됨 |
2B | 전송모드 8(이중 레이어(layer) 전송)에서 사용됨 |
2C | 전송모드 9(다중 레이어(layer) 전송)에서 사용됨 |
3 | 2비트의 전력 조정을 포함하는 PUCCH와 PUSCH를 위한 TPC 명령의 전송에 사용됨 |
3A | 단일 비트 전력 조정을 포함하는 PUCCH와 PUSCH를 위한 TPC 명령의 전송에 사용됨 |
4 | PUSCH(상향링크 그랜트)의 스케줄링에 사용됨. 특히 공간 다중화 모드로 구성되는 단말에 대한 PUSCH 스케줄링에 사용됨 |
지시 필드 | Information |
0 | 마지막 SC-FDMA 심볼에 PUSCH 자원 맵핑함 |
1 | 마지막 SC-FDMA 심볼에 PUSCH 자원 맵핑하지 않음 |
Claims (15)
- 송수신포인트의 채널 맵핑정보 전송에서,특정 단말이 속한 송수신포인트와 다른 송수신포인트의 물리적 상향링크 데이터 채널 맵핑정보를 생성하는 단계; 및상기 물리적 상향링크 데이터 채널 맵핑정보를 상기 특정 단말에 전송하는 단계를 포함하는 송수신포인트의 채널 맵핑정보 전송방법.
- 제1항에 있어서,상기 물리적 상향링크 데이터 채널 맵핑정보는 사운딩 참조 신호 서브프레임 구성정보(SRS subframe configuration) 및 사운딩 참조 신호 대역 구성정보(SRS bandwidth configuration)를 포함하는 상기 다른 송수신포인트의 셀-특정 사운딩 참조 신호 파라미터이며,상기 특정 단말에 전송하는 단계에서, 상기 다른 송수신포인트의 셀-특정 사운딩 참조 신호 파라미터를 단말-특정 상위계층 시그널링을 통해 상기 특정 단말에 전송하는 것을 특징으로 하는 송수신포인트의 채널 맵핑정보 전송방법.
- 제1항에 있어서,상기 물리적 상향링크 데이터 채널 맵핑정보는 상향링크 자원 블록의 마지막 SC-FDMA(Single-Carrier Frequency-Division Multiple Access)심볼에 물리적 상향링크 데이터 채널 자원 맵핑 여부를 지시하는 정보이며,상기 특정 단말에 전송하는 단계에서, 상기 자원 맵핑 여부를 지시하는 정보가 상기 다른 송수신포인트의 상향링크 그랜트(uplink grant)에 해당하는 DCI(Downlink Control Information) 포맷에 포함되어 물리적 하향링크 제어 채널을 통해 전송되는 것을 특징으로 하는 송수신포인트의 채널 맵핑정보 전송방법.
- 제 1 항에 있어서,상기 물리적 상향링크 데이터 채널 맵핑정보는 상기 상향링크 협력통신 수행 여부를 알려주는 정보 또는 상기 다른 송수신포인트를 수신포인트로 설정하는 정보이며,상기 특정 단말에 전송하는 단계에서, 상기 상향링크 협력통신 수행 여부를 알려주는 정보 또는 상기 다른 송수신포인트를 수신포인트로 설정하는 정보를 상위계층 시그널링 또는 물리적 하향링크 제어 채널을 통해 전송되는 것을 특징으로 하는 송수신포인트의 채널 맵핑정보 전송방법.
- 제 4 항에 있어서,상기 다른 송수신포인트를 수신포인트로 설정하는 정보는 가상 셀 아이디인 것을 특징으로 하는 송수신포인트의 채널 맵핑정보 전송방법.
- 제1항에 있어서,상기 물리적 상향링크 데이터 채널 맵핑정보는 상향링크 그랜트에 해당하는 DCI에 붙는 CRC(Cyclic Redundancy Check)의 계산에 이용하는 C-RNTI(Cell Radio-Network Temporary Identifier)의 종류이며,상기 특정 단말에 전송하는 단계에서, 상기 C-RNTI들 중 하나로 계산한 상기 상향링크 그랜트에 해당하는 DCI 포맷을 물리적 하향링크 제어채널을 통해 전송하는 것을 특징으로 하는 송수신포인트의 채널 맵핑정보 전송방법.
- 제 6 항에 있어서,상기 상향링크 그랜트에 해당하는 DCI 포맷은 다른 DCI 포맷과 크기가 다른 DCI 포맷 4인 것을 특징으로 하는 송수신포인트의 채널 맵핑정보 전송방법.
- 단말의 상향링크 데이터 채널 전송에서,자신이 속한 송수신포인트와 다른 송수신포인트의 물리적 상향링크 데이터 채널 맵핑정보를 자신이 속한 송수신포인트로부터 수신하는 단계;상기 물리적 상향링크 데이터 채널 맵핑정보에 따라 물리적 상향링크 데이터 채널을 무선 자원에 맵핑하는 단계; 및상기 무선 자원에 맵핑된 상기 물리적 상향링크 데이터 채널을 상기 다른 송수신포인트로 전송하는 단계를 포함하는 단말의 상향링크 데이터 채널 전송방법.
- 제 8 항에 있어서,상기 물리적 상향링크 데이터 채널 맵핑정보는 사운딩 참조 신호 서브프레임 구성정보(SRS subframe configuration) 및 사운딩 참조 신호 대역 구성정보(SRS bandwidth configuration)를 포함하는 상기 다른 송수신포인트의 셀-특정 사운딩 참조신호 파라미터이며,상기 송수신포인트로부터 수신하는 단계에서, 상기 다른 송수신포인트의 셀-특정 사운딩 참조 신호 파라미터를 단말-특정 상위계층 시그널링을 통해 상기 송수신포인트로부터 수신하고,상기 무선 자원에 맵핑하는 단계에서, 상기 다른 송수신포인트의 셀-특정 사운딩 참조 신호 파라미터에 포함된 셀-특정 사운딩 참조 신호 서브프레임/대역 구성정보를 기반으로 물리적 상향링크 데이터 채널 자원 맵핑 규칙을 적용하여 물리적 상향링크 데이터 채널을 무선 자원에 맵핑하는 것을 특징으로 하는 단말의 상향링크 데이터 채널 전송방법.
- 제8항에 있어서,상기 물리적 상향링크 데이터 채널 맵핑정보는 상향링크 자원 블록의 마지막 SC-FDMA(Single-Carrier Frequency-Division Multiple Access) 심볼에 물리적 상향링크 데이터 채널 자원 맵핑 여부를 지시하는 정보이며,상기 송수신포인트로부터 수신하는 단계에서, 상기 자원 맵핑 여부를 지시하는 정보가 상기 다른 송수신포인트의 상향링크 그랜트(uplink grant)에 해당하는 DCI(Downlink Control Information) 포맷에 포함되어 물리적 하향링크 제어 채널을 통해 상기 송수신포인트로부터 수신하고,상기 무선 자원에 맵핑하는 단계에서, 상향링크 그랜트에 해당하는 DCI 포맷에 포함된 상기 자원 맵핑 여부를 지시하는 정보의 설정값에 따라 상향링크 그랜트가 지시하는 서브프레임의 마지막 SC-FDMA 심볼에 물리적 상향링크 데이터 채널 자원을 맵핑하는 것을 특징으로 하는 단말의 상향링크 데이터 채널 전송방법.
- 제 8 항에 있어서,상기 물리적 상향링크 데이터 채널 맵핑정보는 상기 상향링크 협력통신 수행 여부를 알려주는 정보 또는 상기 다른 송수신포인트를 수신포인트로 설정하는 정보이며,상기 송수신포인트로부터 수신하는 단계에서, 상기 상향링크 협력통신 수행 여부를 알려주는 정보 또는 상기 다른 송수신포인트를 수신포인트로 설정하는 정보를 상위계층 시그널링 또는 물리적 하향링크 제어 채널을 통해 상기 송수신포인트로부터 수신하고,상기 무선 자원에 맵핑하는 단계에서, 모든 서브프레임에 대해 마지막 SC-FDMA 심볼을 제외하고 나머지 무선 자원에 물리적 상향링크 데이터 채널 자원을 맵핑하는 것을 특징으로 하는 단말의 상향링크 데이터 채널 전송방법.
- 제 8 항에 있어서,상기 물리적 상향링크 데이터 채널 맵핑정보는 상향링크 그랜트에 해당하는 DCI에 붙는 CRC(Cyclic Redundancy Check)의 계산에 이용하는 C-RNTI(Cell Radio-Network Temporary Identifier)의 종류이며,상기 송수신포인트로부터 수신하는 단계에서, 상기 C-RNTI들 중 하나로 계산한 상기 상향링크 그랜트에 해당하는 DCI 포맷을 물리적 하향링크 제어채널을 통해 상기 송수신포인트로부터 수신하고,상기 무선 자원에 맵핑하는 단계에서, 상기 상향링크 그랜트가 지시하는 서브프레임의 마지막 SC-FDMA 심볼에 물리적 상향링크 데이터 채널 자원을 맵핑하는 것을 특징으로 하는 단말의 상향링크 데이터 채널 전송방법.
- 제 12 항에 있어서,상기 상향링크 그랜트에 해당하는 DCI 포맷은 다른 DCI 포맷과 크기가 다른 DCI 포맷 4인 것을 특징으로 하는 단말의 상향링크 데이터 채널 전송방법.
- 제10항 또는 제12항에 있어서,상기 무선 자원에 맵핑하는 단계에서, 상향링크 그랜트에 기반하지 않는 물리적 상향링크 데이터 채널 전송 시, 초기 전송(initial transmission) 또는 재전송 이전의 전송을 위한 초기 전송 또는 재전송 이전의 전송과 동일하게 상기 상향링크 그랜트 지시하는 서브프레임의 마지막 SC-FDMA 심볼에 물리적 상향링크 데이터 채널 자원을 맵핑하는 것을 특징으로 하는 단말의 상향링크 데이터 채널 전송방법.
- 상향링크 데이터 채널을 전송하는 단말로,자신이 속한 송수신포인트와 다른 송수신포인트의 물리적 상향링크 데이터 채널 맵핑정보를 자신이 속한 송수신포인트로부터 수신하는 수신부;상기 물리적 상향링크 데이터 채널 맵핑정보에 따라 물리적 상향링크 데이터 채널을 무선 자원에 맵핑하는 제어부; 및상기 무선자원에 맵핑된 상기 물리적 상향링크 데이터 채널을 상기 다른 송수신포인트로 전송하는 송신부를 포함하는 단말.
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CN108112076B (zh) * | 2017-05-05 | 2023-11-21 | 中兴通讯股份有限公司 | 配置上行信号的方法及装置 |
CN111742570A (zh) * | 2017-12-27 | 2020-10-02 | 株式会社Ntt都科摩 | 用户终端以及无线通信方法 |
CN111742570B (zh) * | 2017-12-27 | 2024-02-06 | 株式会社Ntt都科摩 | 终端、基站、***以及无线通信方法 |
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