WO2011099829A2 - 무선 통신 시스템에서 데이터 전송 방법 및 장치 - Google Patents
무선 통신 시스템에서 데이터 전송 방법 및 장치 Download PDFInfo
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- WO2011099829A2 WO2011099829A2 PCT/KR2011/000972 KR2011000972W WO2011099829A2 WO 2011099829 A2 WO2011099829 A2 WO 2011099829A2 KR 2011000972 W KR2011000972 W KR 2011000972W WO 2011099829 A2 WO2011099829 A2 WO 2011099829A2
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- subframe
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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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
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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
- H04L5/0001—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
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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
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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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
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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
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
Definitions
- the present invention relates to wireless communication, and more particularly, to a data transmission method and apparatus in a wireless communication system.
- a channel estimation is necessary to estimate an uplink channel or a downlink channel for data transmission / reception, system synchronization acquisition, channel information feedback, and the like.
- fading occurs due to a multipath time delay.
- the process of restoring the transmission signal by compensating for the distortion of the signal caused by a sudden environmental change due to fading is called channel estimation.
- channel estimation it is necessary to measure the channel state (channel state) for the cell to which the terminal belongs or other cells.
- a channel estimation is generally performed by using a reference signal (RS) that the transceiver knows from each other.
- RS reference signal
- a subcarrier used for transmitting a reference signal is called a reference signal subcarrier, and a resource element used for data transmission is called a data subcarrier.
- reference signals are allocated to all subcarriers and between data subcarriers.
- the method of allocating a reference signal to all subcarriers uses a signal consisting of only a reference signal, such as a preamble signal, in order to obtain a gain of channel estimation performance.
- a reference signal such as a preamble signal
- channel estimation performance may be improved as compared with the method of allocating the reference signal between data subcarriers.
- a method of allocating reference signals between data subcarriers is used to increase the data transmission amount. In this method, since the density of the reference signal decreases, degradation of channel estimation performance occurs, and an appropriate arrangement for minimizing this is required.
- the channel estimate estimated using the reference signal p Is The accuracy depends on the value. Therefore, for accurate estimation of h value Must be converged to 0. To do this, a large number of reference signals are used to estimate the channel. Minimize the impact. There may be various algorithms for good channel estimation performance.
- the uplink reference signal may be classified into a demodulation reference signal (DMRS) and a sounding reference signal (SRS).
- DMRS is a reference signal used for channel estimation for demodulation of a received signal.
- DMRS may be combined with transmission of PUSCH or PUCCH.
- the SRS is a reference signal transmitted by the terminal to the base station for uplink scheduling.
- the base station estimates an uplink channel based on the received sounding reference signal and uses the estimated uplink channel for uplink scheduling.
- the carrier aggregation system refers to a system in which one or more carriers having a bandwidth smaller than the target broadband is configured to configure the broadband when the wireless communication system attempts to support the broadband.
- the terminal may simultaneously transmit or receive one or a plurality of carriers according to capacity.
- the transmission technique used in the carrier aggregation system may be newly defined.
- An object of the present invention is to provide a data transmission method and apparatus in a wireless communication system.
- a method of data transmission in a wireless communication system includes transmitting uplink data through a first physical uplink shared channel (PUSCH) resource allocated to a first CC among a plurality of component carriers (CCs) in a sounding reference signal (SRS) subframe.
- PUSCH physical uplink shared channel
- CCs component carriers
- SRS sounding reference signal
- a second CC of the plurality of CCs includes a SRS SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbol reserved for SRS transmission.
- SRS SC-FDMA Single Carrier-Frequency Division Multiple Access
- the SRS SC-FDMA symbol may be the last SC-FDMA symbol of the SRS subframe.
- the first PUSCH resource may include all SC-FDMA symbols of the SRS subframe.
- SRS may not be transmitted through the SRS SC-FDMA symbol.
- the first PUSCH resource may include all SC-FDMA symbols of the SRS subframe except the SRS SC-FDMA symbol.
- the PUSCH may be rate-matched except for the SRS SC-FDMA symbol.
- the data transmission method may further include transmitting an SRS through the SRS SC-FDMA symbol.
- the SRS subframe may be any one of a plurality of periodic or aperiodic UE specific SRS subframes set by UE-specific SRS parameters.
- the UE-specific SRS parameter may indicate periods and offsets of the plurality of periodic or aperiodic UE-specific SRS subframes.
- the plurality of periodic or aperiodic UE-specific SRS subframes may be a subset of the plurality of cell-specific SRS subframes set by cell-specific SRS parameters.
- the SRS subframe may be any one of a plurality of cell specific SRS subframes set by a cell specific SRS parameter.
- the data transmission method may further include transmitting uplink data through a second PUSCH resource allocated to the second CC in the SRS subframe.
- Bandwidth of some or all of the SRS SC-FDMA symbols may be allocated for transmission of the SRS.
- the first PUSCH resource may be indicated by a Radio Resource Control (RRC) message.
- RRC Radio Resource Control
- a terminal in a wireless communication system.
- the terminal includes a radio frequency (RF) unit for transmitting uplink data through a first PUSCH resource allocated to a first CC among a plurality of CCs in an SRS subframe, and a processor connected to the RF unit.
- RF radio frequency
- a second CC of the plurality of CCs in a subframe may include a reserved SRS SC-FDMA symbol for transmission of the SRS.
- SRS sounding reference signal
- PUSCH physical uplink shared channel
- 1 is a wireless communication system.
- FIG. 2 shows a structure of a radio frame in 3GPP LTE.
- FIG 3 shows an example of a resource grid for one downlink slot.
- 5 shows a structure of an uplink subframe.
- FIG. 6 is an example of a transmitter and a receiver configuring a carrier aggregation system.
- FIG. 7 and 8 illustrate another example of a transmitter and a receiver constituting a carrier aggregation system.
- UL-SCH Uplink Shared Channel
- 11 is an example of a configuration of a data transmission method in a proposed SRS subframe.
- 12 is another example of a configuration of a data transmission method in a proposed SRS subframe.
- 13 is an embodiment of a proposed data transmission method.
- FIG. 14 is a block diagram of a base station and a terminal in which an embodiment of the present invention is implemented.
- 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), or the like.
- IEEE 802.16m is an evolution of IEEE 802.16e and provides backward compatibility with systems based on IEEE 802.16e.
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using Evolved-UMTS Terrestrial Radio Access (E-UTRA), which employs OFDMA in downlink and SC in uplink -FDMA is adopted.
- LTE-A Advanced is an evolution of 3GPP LTE.
- 1 is a wireless communication system.
- the wireless communication system 10 includes at least one base station (BS) 11.
- Each base station 11 provides a communication service for a particular geographic area (generally called a cell) 15a, 15b, 15c.
- the cell can in turn be divided into a number of regions (called sectors).
- the UE 12 may be fixed or mobile, and may include a mobile station (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, and a PDA. (Personal Digital Assistant), a wireless modem (wireless modem), a handheld device (handheld device) may be called other terms.
- the base station 11 generally refers to a fixed station communicating with the terminal 12, and may be referred to as other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), an access point, and the like. have.
- eNB evolved-NodeB
- BTS base transceiver system
- access point and the like. have.
- a terminal typically belongs to one cell, and a cell to which the terminal belongs is called a serving cell.
- a base station that provides a communication service for a serving cell is called a serving BS. Since the wireless communication system is a cellular system, there are other cells adjacent to the serving cell. Another cell adjacent to the serving cell is called a neighbor cell.
- a base station that provides communication service for a neighbor cell is called a neighbor BS. The serving cell and the neighbor cell are relatively determined based on the terminal.
- downlink means communication from the base station 11 to the terminal 12
- uplink means communication from the terminal 12 to the base station 11.
- the transmitter may be part of the base station 11 and the receiver may be part of the terminal 12.
- the transmitter may be part of the terminal 12 and the receiver may be part of the base station 11.
- the wireless communication system is any one of a multiple-input multiple-output (MIMO) system, a multiple-input single-output (MIS) system, a single-input single-output (SISO) system, and a single-input multiple-output (SIMO) system.
- MIMO multiple-input multiple-output
- MIS multiple-input single-output
- SISO single-input single-output
- SIMO single-input multiple-output
- the MIMO system uses a plurality of transmit antennas and a plurality of receive antennas.
- the MISO system uses multiple transmit antennas and one receive antenna.
- the SISO system uses one transmit antenna and one receive antenna.
- the SIMO system uses one transmit antenna and multiple receive antennas.
- the transmit antenna means a physical or logical antenna used to transmit one signal or stream
- the receive antenna means a physical or logical antenna used to receive one signal or stream.
- FIG. 2 shows a structure of a radio frame in 3GPP LTE.
- a radio frame consists of 10 subframes, and one subframe consists of two slots. Slots in a radio frame are numbered with slots # 0 through # 19. The time taken for one subframe to be transmitted is called a Transmission Time Interval (TTI). TTI may be referred to as a scheduling unit for data transmission. For example, one radio frame may have a length of 10 ms, 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 Orthogonal Frequency Division Multiplexing (OFDM) symbols in the time domain and a plurality of subcarriers in the frequency domain.
- the OFDM symbol is used to represent one symbol period since 3GPP LTE uses OFDMA in downlink, and may be called a different name according to a multiple access scheme.
- SC-FDMA when SC-FDMA is used as an uplink multiple access scheme, it may be referred to as an SC-FDMA symbol.
- a resource block (RB) includes a plurality of consecutive subcarriers in one slot in resource allocation units.
- the structure of the radio frame is merely an example. Accordingly, the number of subframes included in the radio frame, the number of slots included in the subframe, or the number of OFDM symbols included in the slot may be variously changed.
- 3GPP LTE defines that one slot includes 7 OFDM symbols in a normal cyclic prefix (CP), and one slot includes 6 OFDM symbols in an extended CP. .
- CP normal cyclic prefix
- a wireless communication system can be largely divided into a frequency division duplex (FDD) system and a time division duplex (TDD) system.
- FDD frequency division duplex
- TDD time division duplex
- uplink transmission and downlink transmission are performed while occupying different frequency bands.
- uplink transmission and downlink transmission are performed at different times while occupying the same frequency band.
- the channel response of the TDD scheme is substantially reciprocal. This means that the downlink channel response and the uplink channel response are almost the same in a given frequency domain. Therefore, in a TDD based wireless communication system, the downlink channel response can be obtained from the uplink channel response.
- the uplink transmission and the downlink transmission are time-divided in the entire frequency band, and thus the downlink transmission by the base station and the uplink transmission by the terminal cannot be simultaneously performed.
- uplink transmission and downlink transmission are performed in different subframes.
- FIG 3 shows an example of a resource grid for one downlink slot.
- the downlink slot includes a plurality of OFDM symbols in the time domain and N RB resource blocks in the frequency domain.
- the number N RB of resource blocks included in the downlink slot depends on the downlink transmission bandwidth set in the cell. For example, in the LTE system, N RB may be any one of 60 to 110.
- One resource block includes a plurality of subcarriers in the frequency domain.
- the structure of the uplink slot may also be the same as that of the downlink slot.
- Each element on the resource grid is called a resource element.
- an exemplary resource block includes 7 ⁇ 12 resource elements including 7 OFDM symbols in the time domain and 12 subcarriers in the frequency domain, but the number of OFDM symbols and the number of subcarriers in the resource block is equal to this. It is not limited. The number of OFDM symbols and the number of subcarriers can be variously changed according to the length of the CP, frequency spacing, and the like. For example, the number of OFDM symbols is 7 for a normal CP and the number of OFDM symbols is 6 for an extended CP. The number of subcarriers in one OFDM symbol may be selected and used among 128, 256, 512, 1024, 1536 and 2048.
- the downlink subframe includes two slots in the time domain, and each slot includes seven OFDM symbols in the normal CP.
- the leading up to 3 OFDM symbols (up to 4 OFDM symbols for 1.4Mhz bandwidth) of the first slot in the subframe are the control regions to which control channels are allocated, and the remaining OFDM symbols are the PDSCH (Physical Downlink Shared Channel). Becomes the data area to be allocated.
- PDCCH is a resource allocation and transmission format of downlink-shared channel (DL-SCH), resource allocation information of uplink shared channel (UL-SCH), paging information on PCH, system information on DL-SCH, random access transmitted on PDSCH Resource allocation of upper layer control messages such as responses, sets of transmit power control commands for individual UEs in any UE group, activation of Voice over Internet Protocol (VoIP), and the like.
- a plurality of PDCCHs may be transmitted in the control region, and the terminal may monitor the plurality of PDCCHs.
- the PDCCH is transmitted on an aggregation of one or several consecutive CCEs.
- CCE is a logical allocation unit used to provide a PDCCH with a coding rate according to a state of a radio channel.
- the CCE corresponds to a plurality of resource element groups.
- the format of the PDCCH and the number of bits of the PDCCH 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 to be sent to the terminal, and attaches a CRC (Cyclic Redundancy Check) to the control information.
- a unique identifier (RNTI: Radio Network Temporary Identifier) is masked according to an owner or a purpose of the PDCCH.
- RNTI Radio Network Temporary Identifier
- the PDCCH is for a specific terminal, a unique identifier of the terminal, for example, a C-RNTI (Cell-RNTI) may be masked to the CRC.
- a paging indication identifier for example, P-RNTI (P-RNTI) may be masked to the CRC.
- SI-RNTI system information RNTI
- RA-RNTI random access-RNTI
- 5 shows a structure of an uplink subframe.
- the uplink subframe may be divided into a control region and a data region in the frequency domain.
- the control region is allocated a Physical Uplink Control Channel (PUCCH) for transmitting uplink control information.
- the data region is allocated a physical uplink shared channel (PUSCH) for transmitting data.
- the terminal may support simultaneous transmission of the PUSCH and the PUCCH.
- PUCCH for one UE is allocated to an RB pair in a subframe.
- Resource blocks belonging to a resource block pair occupy different subcarriers in each of the first slot and the second slot.
- the frequency occupied by the resource block belonging to the resource block pair allocated to the PUCCH is changed based on a slot boundary. This is called that the RB pair allocated to the PUCCH is frequency-hopped at the slot boundary.
- the terminal may obtain a frequency diversity gain by transmitting uplink control information through different subcarriers over time.
- m is a location index indicating a logical frequency domain location of a resource block pair allocated to a PUCCH in a subframe.
- the uplink control information transmitted on the PUCCH includes a hybrid automatic repeat request (HARQ) acknowledgment (ACK) / non-acknowledgement (NACK), a channel quality indicator (CQI) indicating a downlink channel state, and an SR that is an uplink radio resource allocation request.
- HARQ hybrid automatic repeat request
- ACK acknowledgment
- NACK non-acknowledgement
- CQI channel quality indicator
- SR scheduling request
- the uplink data transmitted on the PUSCH may be a transport block which is a data block for the UL-SCH transmitted during the TTI.
- the transport block may be user information.
- the uplink data may be multiplexed data.
- the multiplexed data may be a multiplexed transport block and control information for the UL-SCH.
- control information multiplexed with data may include CQI, PMI (Precoding Matrix Indicator), HARQ, RI (Rank Indicator), and the like.
- the uplink data may consist of control information only.
- 3GPP LTE-A supports a carrier aggregation system.
- the carrier aggregation system may refer to 3GPP TR 36.815 V9.0.0 (2010-3).
- the carrier aggregation system refers to a system in which one or more carriers having a bandwidth smaller than the target broadband is configured to configure the broadband when the wireless communication system attempts to support the broadband.
- the carrier aggregation system may be called another name such as a bandwidth aggregation system.
- the carrier aggregation system may be classified into a contiguous carrier aggregation system in which each carrier is continuous and a non-contiguous carrier aggregation system in which each carrier is separated from each other. In a continuous carrier aggregation system, frequency spacing may exist between each carrier.
- a target carrier may use the bandwidth used by the existing system as it is for backward compatibility with the existing system.
- bandwidths of 1.4 MHz, 3 MHz, 5 MHz, 10 MHz, 15 MHz, and 20 MHz are supported, and in 3GPP LTE-A, a bandwidth of 20 MHz or more can be configured using only the bandwidth of the 3GPP LTE system.
- broadband can be configured by defining new bandwidth without using the bandwidth of the existing system.
- the terminal may simultaneously transmit or receive one or a plurality of carriers according to capacity.
- the LTE-A terminal may simultaneously transmit or receive a plurality of carriers.
- the LTE rel-8 terminal may transmit or receive only one carrier when each carrier constituting the carrier aggregation system is compatible with the LTE rel-8 system. Therefore, when at least the number of carriers used in the uplink and the downlink is the same, all component carriers need to be configured to be compatible with the LTE rel-8.
- the plurality of carriers may be managed by a media access control (MAC).
- MAC media access control
- both the transmitter and the receiver should be able to transmit / receive the plurality of carriers.
- FIG. 6 is an example of a transmitter and a receiver configuring a carrier aggregation system.
- one MAC manages and operates all n carriers to transmit and receive data.
- the same is true of the receiver of Fig. 6- (b).
- There may be one transport block and one HARQ entity per component carrier from the receiver's point of view.
- the terminal may be scheduled for a plurality of carriers at the same time.
- the carrier aggregation system of FIG. 6 may be applied to both a continuous carrier aggregation system and a discontinuous carrier aggregation system.
- Each carrier managed by one MAC does not need to be adjacent to each other, and thus has an advantage in that it is flexible in terms of resource management.
- FIG. 7 and 8 illustrate another example of a transmitter and a receiver constituting a carrier aggregation system.
- one MAC manages only one carrier. That is, MAC and carrier correspond one-to-one.
- MAC and carrier correspond to one-to-one for some carriers, and one MAC controls a plurality of carriers for the remaining carriers. That is, various combinations are possible due to the correspondence between the MAC and the carrier.
- the carrier aggregation system of FIGS. 6 to 8 includes n carriers, and each carrier may be adjacent to or separated from each other.
- the carrier aggregation system may be applied to both uplink and downlink.
- each carrier is configured to perform uplink transmission and downlink transmission.
- a plurality of carriers may be divided into uplink and downlink.
- the number of component carriers used in uplink and downlink and the bandwidth of each carrier are the same.
- an asymmetric carrier aggregation system may be configured by varying the number and bandwidth of carriers used in uplink and downlink.
- 9A illustrates an example of a carrier aggregation system in which the number of downlink component carriers (CCs) is larger than the number of uplink CCs.
- Downlink CC # 1 and # 2 correspond to uplink CC # 1
- downlink CC # 3 and # 4 correspond to uplink CC # 2.
- 9- (b) shows an example of a carrier aggregation system in which the number of downlink CCs is larger than the number of uplink CCs.
- the downlink CC # 1 corresponds to the uplink CC # 1 and # 2
- the downlink CC # 2 corresponds to the uplink CC # 3 and # 4.
- one transport block and one hybrid automatic repeat request (HARQ) entity exist for each component carrier scheduled from the terminal's point of view.
- Each transport block is mapped to only one component carrier.
- the terminal may be simultaneously mapped to a plurality of component carriers.
- HARQ hybrid automatic repeat request
- the backward compatible carrier is a carrier that can be connected to a terminal of all LTE releases including LTE rel-8, LTE-A, and the like.
- the backward compatible carrier may operate as a single carrier or as a component carrier in a carrier aggregation system.
- the backward compatibility carrier may always be configured as a pair of downlink and uplink in the FDD system.
- the non-compatible carrier may not be connected to the terminal of the previous LTE release, but may be connected only to the terminal of the LTE release defining the carrier.
- a non-compatible carrier may operate as a single carrier or as a component carrier in a carrier aggregation system.
- a carrier in a carrier set including at least one carrier which may not operate as a single carrier and may operate as a single carrier may be referred to as an extension carrier.
- cell-specific carrier aggregation systems operated by an arbitrary cell or a base station in a form of using one or more carriers in a carrier aggregation system and a UE-specific operation by a terminal There can be.
- a cell means one backward compatible carrier or one incompatible backward carrier
- the term cell specific may be used for one or more carriers including one carrier represented by a cell.
- the form of a carrier aggregation system in the FDD system is to determine the linkage of the downlink and uplink according to the default Tx-Rx separation defined in LTE rel-8 or LTE-A. Can be.
- the basic transmit-receive separation in LTE rel-8 is as follows.
- the carrier frequency may be allocated in the range of 0 to 65535 by an E-UTRA Absolute Radio Frequency Channel Number (EARFCN).
- EARFCN E-UTRA Absolute Radio Frequency Channel Number
- F UL F UL_low + 0.1 (N UL -N Offs-UL ).
- N DL is a downlink EARFCN
- N UL is an uplink EARFCN.
- F DL-low , N Offs-DL , F UL-low , and N Offs-UL may be determined by Table 1.
- Tx channel The separation of the basic E-TURA transmission channel (Tx channel) and the reception channel (Rx channel) can be determined by Table 2.
- Reference signals are generally transmitted in sequence.
- the reference signal sequence may use a PSK-based computer generated sequence.
- PSKs include binary phase shift keying (BPSK) and quadrature phase shift keying (QPSK).
- the reference signal sequence may use a constant amplitude zero auto-correlation (CAZAC) sequence.
- CAZAC sequences are ZC-based sequences, ZC sequences with cyclic extensions, ZC sequences with truncation, etc. There is this.
- the reference signal sequence may use a pseudo-random (PN) sequence.
- PN sequences include m-sequences, computer generated sequences, Gold sequences, and Kasami sequences.
- the reference signal sequence may use a cyclically shifted sequence.
- the uplink reference signal may be classified into a demodulation reference signal (DMRS) and a sounding reference signal (SRS).
- DMRS is a reference signal used for channel estimation for demodulation of a received signal.
- DMRS may be combined with transmission of PUSCH or PUCCH.
- the SRS is a reference signal transmitted by the terminal to the base station for uplink scheduling.
- the base station estimates an uplink channel based on the received sounding reference signal and uses the estimated uplink channel for uplink scheduling.
- SRS is not combined with transmission of PUSCH or PUCCH.
- the same kind of base sequence can be used for DMRS and SRS.
- precoding applied to DMRS in uplink multi-antenna transmission may be the same as precoding applied to PUSCH. Cyclic shift separation is a primary scheme for multiplexing DMRS.
- the SRS may not be precoded and may also be an antenna specified reference signal.
- the SRS is a reference signal transmitted from the terminal or the relay station to the base station.
- the SRS is a reference signal not related to uplink data or control signal transmission.
- SRS is generally used for channel quality estimation for frequency selective scheduling in uplink, but may be used for other purposes. For example, it can be used for power control, initial MCS selection, or initial power control for data transmission.
- SRS is generally transmitted in the last SC-FDMA symbol of one subframe.
- C SRS which is a cell specific SRS transmission bandwidth
- a cell specific SRS transmission subframe may also be given by an upper layer.
- B SRS denotes an SRS bandwidth and b hop denotes a frequency hopping bandwidth.
- N b may be determined by a table predetermined by C SRS and B SRS . to be.
- the corresponding SC-FDMA symbol may be used for SRS transmission.
- UpPTS Uplink Pilot Time Slot
- both corresponding SC-FDMA symbols may be used for SRS transmission and may be simultaneously assigned to one UE.
- the terminal When the transmission of the SRS and the transmission of the PUCCH format 2 / 2a / 2b simultaneously occur in the same subframe, the terminal does not always transmit the SRS.
- the UE does not always transmit the SRS when the SRS transmission and the PUCCH carrying the ACK / NACK and / or the positive SR are performed in the same subframe.
- the UE uses the shortened PUCCH format when the SRS transmission and the transmission of the PUCCH carrying the ACK / NACK and / or the positive SR are configured in the same subframe. Simultaneously transmit PUCCH and SRS carrying / NACK and / or positive SR.
- a PUCCH carrying an ACK / NACK and / or a positive SR is configured in a cell-specific SRS subframe
- a shortened PUCCH format is used and a PUCCH and SRS carrying an ACK / NACK and / or a positive SR are configured. Send simultaneously.
- the terminal does not transmit the SRS.
- PRACH Physical Random Access Channel
- AckNackSRS-SimultaneousTransmission determines whether the UE supports simultaneous transmission of PUCCH and SRS carrying ACK / NACK in one subframe. If the UE is configured to simultaneously transmit PUCCH and SRS carrying ACK / NACK in one subframe, the UE may transmit ACK / NACK and SRS in a cell specific SRS subframe. In this case, a shortened PUCCH format may be used, and transmission of an ACK / NACK or SR corresponding to a location where the SRS is transmitted is omitted (punctured). The reduced PUCCH format is used in a cell specific SRS subframe even when the UE does not transmit an SRS in the corresponding subframe.
- the UE may use the general PUCCH format 1 / 1a / 1b for transmitting the ACK / NACK and the SR.
- Tables 3 and 4 show examples of a UE-specific SRS configuration indicating T SRS which is an SRS transmission period and T offset which is an SRS subframe offset.
- SRS transmission period T SRS may be determined by any one of ⁇ 2, 5, 10, 20, 40, 80, 160, 320 ⁇ ms.
- Table 3 is an example of an SRS configuration in an FDD system.
- Table 4 is an example of an SRS configuration in a TDD system.
- n f represents a frame index and k SRS is a subframe index within a frame in the FDD system.
- K SRS in a TDD system may be determined by Table 5.
- the UE transmits the PUSCH corresponding to the retransmission of the same transport block as part of the transmission of the SRS and the random access response grant or the contention-based random access procedure.
- SRS is not always transmitted.
- UL-SCH Uplink Shared Channel
- TTI Transmit Time Interval
- a cyclic redundancy check is added to a transport block in step S100. Error detection for the UL-SCH transport block may be supported by the addition of the CRC. All transport blocks can be used to calculate the CRC parity bit.
- the bits in the transport block passed to layer 1 are a 0 ,... , a A-1 , the parity bits are p 0 ,... can be expressed as L-1 .
- the size of the transport block is A, the size of the parity bit is L.
- A0 which is the smallest order bit of information, may be mapped to the Most Significant Bit (MSB) of the transport block.
- step S110 the transport block to which the CRC is added is segmented into a plurality of code blocks, and a CRC is added to each code block.
- the bits before being divided into code blocks may be represented by b 0 , ..,. B B-1 , where B is the number of bits in a transport block including a CRC.
- the bits after the code block division are c r0 ,... , c r (Kr-1) , where r is a code block number and Kr is the number of bits of the code block number r.
- step S120 channel coding is performed on each code block.
- the total number of code blocks is C, and channel coding may be performed for each code block separately in a turbo coding scheme.
- step S130 rate matching is performed on each code block on which channel coding is performed. Rate matching may be performed individually for each code block.
- the bits after the rate matching are performed are e r0 ,... , e r (Er-1) , where r is a code block number and Er is the number of rate matched bits of the code block number r.
- each code block on which rate matching is performed is concatenated.
- the bits after each code block are concatenated into f 0 ,. , f G-1 , where G is the total number of coded transmission bits except bits used for transmission of control information.
- the control information may be multiplexed with the UL-SCH transmission.
- step S141 to step S143 channel coding is performed on the control information.
- the control information may include channel quality information including channel quality information (CQI) and / or precoding matrix indicator (PMI), hybrid automatic repeat request (HARQ) -acknowledgement (ACK), rank indicator (RI), and the like.
- CQI channel quality information
- PMI precoding matrix indicator
- HARQ hybrid automatic repeat request
- ACK rank indicator
- RI rank indicator
- the CQI includes a PMI.
- Different control rates are applied to each control information according to the number of different coding symbols.
- channel coding for CQI, RI and HARQ-ACK is performed independently.
- the CQI in step S141, the RI in step S142, and the HARQ-ACK are channel coded in step S143, but are not limited thereto.
- two HARQ-ACK feedback modes of HARQ-ACK bundling and HARQ-ACK multiplexing may be supported by a higher layer.
- the HARQ-ACK includes one or two information bits.
- the AHRQ-ACK includes 1 to 4 information bits.
- the number Q 'of coded symbols may be determined by Equation 4.
- Equation 4 O represents the number of HARQ-ACK bits or RI bits, and M sc PUSCH represents the scheduled bandwidth for PUSCH transmission in the current subframe of the transport block as the number of subcarriers.
- N SRS 1
- N SRS 0.
- M sc PUSCH-initial , C and Kr can be obtained from the initial PDCCH for the same transport block. If DCI format 0 in the initial PDCCH for the same transport block does not exist, M sc PUSCH-initial , C and Kr are most recently semi-permanent when the initial PUSCH for the same transport block is scheduled semi-persistent. From a PDCCH allocated semi-persistent, when a PUSCH is initialized from a random access response grant, it can be obtained from a random access response grant for the same transport block.
- HARQ-ACK In HARQ-ACK transmission, ACK may be encoded as '1' in binary, and NACK may be encoded as '0' in binary. If HARQ-ACK is [o 0 ACK ] including 1 bit information, it may be encoded according to Table 6.
- x and y are placeholders for scrambling HARQ-ACK bits in a manner to maximize the Euclidean distance of a modulation symbol carrying HARQ-ACK information. placeholder).
- the bit sequence q 0 ACK ,... q QACK-1 ACK can be obtained by concatenating a plurality of encoded HARQ-ACK blocks.
- Q ACK is the total number of encoded bits in all encoded HARQ-ACK blocks.
- the concatenation of the last HARQ-ACK block may be partially performed to match the total length of the bit sequence to Q ACK .
- Bit sequence for TDD HARQ-ACK bundling mode Can be obtained by concatenating a plurality of encoded HARQ-ACK blocks.
- Q ACK is the total number of encoded bits in all encoded HARQ-ACK blocks.
- the concatenation of the last HARQ-ACK block may be partially performed to match the total length of the bit sequence to Q ACK .
- the scrambling sequence [w 0 ACK w 1 ACK w 2 ACK w 3 ACK ] may be determined by Table 8.
- bit sequence q 0 ACK ,... q QACK-1 ACK can be obtained from Equation 5.
- the bit size of the corresponding RI feedback for PDSCH transmission may be determined assuming the maximum number of layers according to the antenna configuration of the base station and the terminal. If the RI is [o 0 RI ] including 1 bit information, it may be encoded according to Table 9.
- RI is [o 0 RI o 1 RI ] containing 2-bit information
- o 0 RI corresponds to MSB of 2-bit information
- 0 1 RI corresponds to LSB (Least Significant Bit) of 2-bit information.
- o 2 RI (o 0 RI + o 1 RI ) mod 2.
- mapping of [o 0 RI o 1 RI ] and RI may be given by Table 12.
- x and y represent placeholders for scrambled RI bits in a way to maximize the Euclidean distance of modulation symbols carrying RI information.
- Bit sequence q 0 RI ,... q QRI-1 RI can be obtained by concatenating a plurality of encoded RI blocks.
- Q RI is the total number of encoded bits in all encoded RI blocks.
- the concatenation of the last RI block may be partially performed to fit the total length of the bit sequence to Q RI .
- the number Q 'of coded symbols may be determined by Equation 6.
- N symb PUSCH-initial is the number of SC-FDMA symbols per subframe for initial PUSCH transmission in the same transport block.
- G N symb PUSCH * M sc PUSCH * Q m -Q CQI -Q RI , where M sc PUSCH is the scheduled bandwidth for the PUSCH transmission in the current subframe of the transport block. It is expressed as a number.
- N symb PUSCH (2 * (N symb UL ⁇ 1) ⁇ N SRS ).
- the channel coding of the CQI information is performed by the input sequence o 0 ,. , o is performed based on O-1 . If the size of the payload is larger than 11 bits, CRC addition, channel coding and rate matching for CQI information are performed, respectively.
- the input sequence for the CRC addition process is o 0 ,.... o becomes O-1
- the output sequence to which the CRC is added becomes the input sequence of the channel coding process, and the output sequence of the channel coding process becomes the input sequence of the rate matching process.
- the output sequence of the final channel coding of the CQI information is q 0 ,... q Can be expressed as QCQI-1 .
- step S150 multiplexing of data and control information is performed.
- the HARQ-ACK information exists in both slots of the subframe and may be mapped to resources around a demodulation reference signal (DMRS).
- DMRS demodulation reference signal
- the data and the control information can be mapped to different modulation symbols.
- CQI information may be multiplexed with data on a UL-SCH transport block having the highest Modulation and Coding Scheme (MCS).
- MCS Modulation and Coding Scheme
- channel interleaving is performed.
- Channel interleaving may be performed in conjunction with PUSCH resource mapping, and modulation symbols may be time first mapped to a transmit waveform by channel interleaving.
- HARQ-ACK information may be mapped to resources around the uplink DRMS, and RI information may be mapped around resources used by the HARQ-ACK information.
- LTE-A may use a plurality of component carriers as a transmission resource in an arbitrary cell, and individual terminals uniquely set a carrier used for downlink or uplink transmission.
- SRS and the PUSCH are allocated to the same subframe in a single carrier, the sounding process of the terminal is defined in LTE rel-8, but is not defined in the carrier aggregation system.
- the present invention proposes a PUSCH and SRS transmission method in a carrier aggregation system in which a plurality of component carriers exist.
- transmission of the SRS is configured independently for each component carrier. That is, subframes in which the SRS can be transmitted are independently configured for each component carrier regardless of whether the SRS is actually transmitted.
- the first carrier may be configured to transmit the SRS
- the second carrier may be configured to transmit the PUSCH.
- PAPR peak-to-average power ratio
- CM cubic metric
- the maximum transmit power allocated to each UE may be limited for SRS and PUSCH transmitted on different component carriers in the same subframe, and in particular, power boosting may be performed to increase coverage of the SRS. If applied, the maximum transmit power of each terminal may be further limited.
- the SRS transmission method may be divided into two types. Periodic SRS transmission method that periodically transmits SRS according to the SRS parameter received by RRC (Radio Resource Control) signaling by the method defined in LTE rel-8, and triggers dynamically from the base station There is an aperiodic SRS transmission method for transmitting an SRS whenever necessary based on a message. In LTE-A, an aperiodic SRS transmission method may be introduced.
- RRC Radio Resource Control
- the SRS may be transmitted in a UE-specific SRS subframe determined UE-specifically.
- a cell-specific SRS subframe is periodically set by a cell-specific SRS parameter, and a periodic UE-specific SRS subframe set by a terminal-specific SRS parameter among cell-specific SRS subframes.
- SRS is periodically transmitted at.
- the periodic UE-specific SRS subframe may be a subset of the cell-specific SRS subframe.
- the SRS may be transmitted in a subframe close to the time point at which the base station sends a message among the periodic UE-specific SRS subframes determined by the UE-specific SRS parameter.
- the UE-specific SRS subframes of the aperiodic SRS transmission method may also be a subset of the cell-specific SRS subframes defined in LTE rel-8, and the UE-specific SR subframes include the subframe periods and subframes of Table 3 or Table 4 described above. It may be set by the frame offset.
- the present invention proposes a method for simultaneously allocating an SRS and a PUSCH in a UE-specific SRS subframe determined to be UE-specific in a carrier aggregation system, while maintaining a single carrier characteristic of SRS transmission and reducing transmission power.
- SRS and PUSCH may be allocated to the same subframe and transmitted, but in order to maintain a single carrier characteristic of SRS transmission, any one of SRS assignment and PUSCH assignment may be prioritized.
- uplink data may not be transmitted through the PUSCH in the last SC-FDMA symbol to which the SRS is allocated in the corresponding subframe.
- rate matching or puncturing for the PUSCH may be used as a method of not transmitting uplink data in the last SC-FDMA symbol to which the SRS is allocated.
- rate matching the amount of data to be transmitted per transmission unit time (TTI) can be matched with the maximum amount of PUSCH transmitting actual data.
- rate matching is performed except for the last SC-FDMA symbol to which an SRS is allocated. Can be performed.
- the data allocated to the last SC-FDMA symbol to which the SRS is allocated may be punctured not to transmit through the PUSCH. Can be done. That is, in a situation where transmission power is limited, the SRS is assigned to the PUSCH and transmitted.
- 11 is an example of a configuration of a data transmission method in a proposed SRS subframe.
- the SRS subframe of FIG. 11 is a subframe of any of the UE-specific SRS subframes determined periodically or aperiodically. Alternatively, when the aperiodic UE specific SRS subframe is the same as the cell specific SRS subframe, the SRS subframe of FIG. 11 is one of the cell specific SRS subframes.
- 11- (a) illustrates a case where a PUSCH is simultaneously allocated to a UL CC transmitting SRS. The last SC-FDMA symbol of the SRS subframe of the UL CC # 2 is allocated for SRS transmission, and the PUSCH is allocated to the remaining SC-FDMA symbols to transmit data.
- a PUSCH may be allocated and data may be transmitted.
- 11- (b) shows a case in which a PUSCH is not allocated to a UL CC transmitting SRS.
- the last SC-FDMA symbol of the SRS subframe of UL CC # 2 is allocated for SRS transmission.
- a PUSCH may be allocated and data may be transmitted.
- the bandwidth occupied by the SRS in the last SC-FDMA symbol of the SRS subframe may be the entire system bandwidth, or may be a narrow band or a partial bandwidth. In addition, it may be a terminal specific SRS bandwidth defined in LTE rel-8 / 9, or may be a newly set SRS bandwidth in LTE-A.
- the bandwidth occupied by the PUSCH in the remaining SC-FDMA symbols is not limited.
- the PUSCH may be rate matched except for the last SC-FDMA symbol assigned to the SRS.
- the PUSCH transmission in the corresponding SRS subframe may be rate matched so that the PUSCH transmission is performed on the remaining SC-FDMA symbols not transmitting the SRS.
- the PUSCH allocated to the last SC-FDMA symbol may be punctured without rate matching the PUSCH.
- rate matching the PUSCH the reliability and coverage of the SRS transmission can be increased while reducing the data rate of one SC-FDMA symbol when transmitting data through the PUSCH.
- Rate matching or puncturing described above may be selectively applied according to a transmission mode or channel environment of a corresponding UE, implicitly indicated through other parameters already defined, or indicated by explicitly signaling a newly defined parameter. Can be.
- the plurality of component carriers constituting the carrier aggregation system may be limited to resources used by one terminal. That is, the proposed invention may be a method of allocating SRS and PUSCH simultaneously in a plurality of component carriers in the same terminal.
- cell-specific or carrier-specific rate matching or puncturing of the plurality of terminals is performed at least in the carrier. can be applied specifically.
- whether to apply rate matching or puncturing of the PUSCH may be specifically determined by UE for L1 / L2 signaling or RRC can be signaled.
- 12 is another example of a configuration of a data transmission method in a proposed SRS subframe.
- the last SC-FDMA symbol of the SRS subframe of UL CC # 2 is allocated for SRS transmission, but the SRS is not actually transmitted.
- PUSCH is allocated to the remaining SC-FDMA symbols of UL CC # 2 to transmit uplink data.
- a PUSCH may be allocated over all SC-FDMA symbols and uplink data may be transmitted. Accordingly, the data rate of the PUSCH transmission and the quality of service (QoS) of the data transmitted through the PUSCH can be guaranteed.
- whether to allocate SRS first or PUSCH first may be determined through an RRC message.
- the resource allocation method can be flexibly changed according to the transmission mode or the channel environment of each terminal. For example, according to the RRC message indicating simultaneous transmission of the PUSCH and the PUCCH, it is possible to select whether to assign the SRS or give priority to the PUSCH. That is, when simultaneous transmission of PUSCH and PUCCH is indicated, SRS is given priority and SRS and PUSCH are simultaneously transmitted in an SRS subframe. If simultaneous transmission of PUSCH and PUCCH is not indicated, priority is given to PUSCH and transmission of SRS is omitted. can do. Alternatively, according to the newly defined RRC message, it may be selected whether to allocate SRS or PUSCH first.
- the method of 1) which prioritizes SRS has a disadvantage in that PUSCH rate matching or puncturing may occur frequently. However, since SRS transmission is rarely omitted, coverage of SRS and efficiency of SRS transmission increase.
- the method of 2) which prioritizes PUSCH has a disadvantage in that an opportunity of SRS transmission is greatly reduced, and aperiodic SRS transmission introduced in LTE-A is poor in order to compensate for periodic SRS of LTE rel-8. Since rate matching except for the last SC-FDMA symbol of the subframe is not performed, data throughput can be increased.
- uplink control information UCI
- reliability of UCI transmission may be maintained.
- step S200 the UE transmits uplink data through a first PUSCH resource allocated to a first CC among a plurality of CCs in an SRS subframe.
- a second CC of the plurality of CCs in the SRS subframe includes an SRS SC-FDMA symbol reserved for transmission of the SRS.
- the UE is configured to transmit the PUSCH and SRS in the same subframe for the initial transmission, or the PUSCH resource allocation for the initial transmission partially overlaps the bandwidth allocated for the UE-specific SRS subframe and SRS transmission, or
- the UE is configured to transmit the PUSCH and SRS in the same subframe for the initial transmission, or the PUSCH resource allocation for the initial transmission partially overlaps the bandwidth allocated for the UE-specific SRS subframe and SRS transmission, or
- FIG. 14 is a block diagram of a base station and a terminal in which an embodiment of the present invention is implemented.
- the base station 800 includes a processor 810, a memory 820, and a radio frequency unit (RF) 830.
- Processor 810 implements the proposed functions, processes, and / or methods. Layers of the air interface protocol may be implemented by the processor 810.
- the memory 820 is connected to the processor 810 and stores various information for driving the processor 810.
- the RF unit 830 is connected to the processor 810 to transmit and / or receive a radio signal.
- the terminal 900 includes a processor 910, a memory 920, and an RF unit 930.
- the RF unit 930 is connected to the processor 910 to perform uplink data through a first PUSCH resource allocated to a first CC among a plurality of CCs in an SRS subframe.
- the second CC of the plurality of CCs in the SRS subframe may include a reserved SRS SC-FDMA symbol for transmission of the SRS.
- Processor 910 implements the proposed functions, processes, and / or methods. Layers of the air interface protocol may be implemented by the processor 910.
- the memory 920 is connected to the processor 910 and stores various information for driving the processor 910.
- Processors 810 and 910 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices.
- the memory 820, 920 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium, and / or other storage device.
- the RF unit 830 and 930 may include a baseband circuit for processing a radio signal.
- the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
- the module may be stored in the memory 820, 920 and executed by the processor 810, 910.
- the memories 820 and 920 may be inside or outside the processors 810 and 910, and may be connected to the processors 810 and 910 by various well-known means.
- the methods are described based on a flowchart as a series of steps or blocks, but the invention is not limited to the order of steps, and certain steps may occur in a different order or concurrently with other steps than those described above. Can be.
- the steps shown in the flowcharts are not exclusive and that other steps may be included or one or more steps in the flowcharts may be deleted without affecting the scope of the present invention.
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Abstract
Description
E-UTRA Operating Band |
Downlink | Uplink | ||||
FDL_low(MHz) | NOffs-DL | Range of NDL | FUL_low(MHz) | NOffs-UL | Range of NUL | |
1 | 2110 | 0 | 0-599 | 1920 | 18000 | 18000-18599 |
2 | 1930 | 600 | 600-1199 | 1850 | 18600 | 18600-19199 |
3 | 1805 | 1200 | 1200-1949 | 1710 | 19200 | 19200-19949 |
4 | 2110 | 1950 | 1950-2399 | 1710 | 19950 | 19950-20399 |
5 | 869 | 2400 | 2400-2649 | 824 | 20400 | 20400-20649 |
6 | 875 | 2650 | 2650-2749 | 830 | 20650 | 20650-20749 |
7 | 2620 | 2750 | 2750-3449 | 2500 | 20750 | 20750-21449 |
8 | 925 | 3450 | 3450-3799 | 880 | 21450 | 21450-21799 |
9 | 1844.9 | 3800 | 3800-4149 | 1749.9 | 21800 | 21800-22149 |
10 | 2110 | 4150 | 4150-4749 | 1710 | 22150 | 22150-22749 |
11 | 1475.9 | 4750 | 4750-4999 | 1427.9 | 22750 | 22750-22999 |
12 | 728 | 5000 | 5000-5179 | 698 | 23000 | 23000-23179 |
13 | 746 | 5180 | 5180-5279 | 777 | 23180 | 23180-23279 |
14 | 758 | 5280 | 5280-5379 | 788 | 23280 | 23280-23379 |
… | ||||||
17 | 734 | 5730 | 5730- 5849 | 704 | 23730 | 23730-23849 |
… | ||||||
33 | 1900 | 26000 | 36000-36199 | 1900 | 36000 | 36000-36199 |
34 | 2010 | 26200 | 36200-36349 | 2010 | 36200 | 36200-36349 |
35 | 1850 | 26350 | 36350-36949 | 1850 | 36350 | 36350-36949 |
36 | 1930 | 26950 | 36950-37549 | 1930 | 36950 | 36950-37549 |
37 | 1910 | 27550 | 37550-37749 | 1910 | 37550 | 37550-37749 |
38 | 2570 | 27750 | 37750-38249 | 2570 | 37750 | 37750-38249 |
39 | 1880 | 28250 | 38250-38649 | 1880 | 38250 | 38250-38649 |
40 | 2300 | 28650 | 38650-39649 | 2300 | 38650 | 38650-39649 |
Frequency Band | TX-RX carrier centre frequency separation |
1 | 190 MHz |
2 | 80 MHz |
3 | 95 MHz |
4 | 400 MHz |
5 | 45 MHz |
6 | 45 MHz |
7 | 120 MHz |
8 | 45 MHz |
9 | 95 MHz |
10 | 400 MHz |
11 | 48 MHz |
12 | 30 MHz |
13 | -31 MHz |
14 | -30 MHz |
17 | 30 MHz |
SRS Configuration Index ISRS | SRS Periodicity TSRS (ms) | SRS Subframe Offset Toffset |
0 - 1 | 2 | ISRS |
2 - 6 | 5 | ISRS - 2 |
7 - 16 | 10 | ISRS - 7 |
17 - 36 | 20 | ISRS - 17 |
37 - 76 | 40 | ISRS - 37 |
77 - 156 | 80 | ISRS - 77 |
157 - 316 | 160 | ISRS - 157 |
317 - 636 | 320 | ISRS - 317 |
637 - 1023 | reserved | reserved |
Configuration Index ISRS | SRS Periodicity TSRS (ms) | SRS Subframe Offset Toffset |
0 | 2 | 0, 1 |
1 | 2 | 0, 2 |
2 | 2 | 1, 2 |
3 | 2 | 0, 3 |
4 | 2 | 1, 3 |
5 | 2 | 0, 4 |
6 | 2 | 1, 4 |
7 | 2 | 2, 3 |
8 | 2 | 2, 4 |
9 | 2 | 3, 4 |
10 - 14 | 5 | ISRS - 10 |
15 - 24 | 10 | ISRS - 15 |
25 - 44 | 20 | ISRS - 25 |
45 - 84 | 40 | ISRS - 45 |
85 - 164 | 80 | ISRS - 85 |
165 - 324 | 160 | ISRS - 165 |
325 - 644 | 320 | ISRS - 325 |
645 - 1023 | reserved | reserved |
subframe index n | ||||||||||||
0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |||
1st symbol of UpPTS | 2nd symbol of UpPTS | 1st symbol of UpPTS | 2nd symbol of UpPTS | |||||||||
kSRS in case UpPTS length of 2 symbols | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ||
kSRS in case UpPTS length of 1 symbol | 1 | 2 | 3 | 4 | 6 | 7 | 8 | 9 |
Qm | Encoded HARQ-ACK |
2 | [o0 ACK y] |
4 | [o0 ACK y x x] |
6 | [o0 ACK y x x x x |
Qm | Encoded HARQ-ACK |
2 | [o0 ACK o1 ACK o2 ACK o0 ACK o1 ACK o2 ACK] |
4 | [o0 ACK o1 ACK x x o2 ACK o0 ACK x x o1 ACK o2 ACK x x] |
6 | [o0 ACK o1 ACK x x x x o2 ACK o0 ACK x x x x o1 ACK o2 ACK x x x x] |
i | [w0 ACK w1 ACK w2 ACK w3 ACK] |
0 | [1 1 1 1] |
1 | [1 0 1 0] |
2 | [1 1 0 0] |
3 | [1 0 0 1] |
Qm | Encoded RI |
2 | [o0 RI y] |
4 | [o0 RI y x x] |
6 | [o0 RI y x x x x |
o0 RI | RI |
0 | 1 |
1 | 2 |
Qm | Encoded RI |
2 | [o0 RI o1 RI o2 RI o0 RI o1 RI o2 RI] |
4 | [o0 RI o1 RI x x o2 RI o0 RI x x o1 RI o2 RI x x] |
6 | [o0 RI o1 RI x x x x o2 RI o0 RI x x x x o1 RI o2 RI x x x x] |
o0 RI. o1 RI | RI |
0, 0 | 1 |
0, 1 | 2 |
1, 0 | 3 |
1, 1 | 4 |
Claims (15)
- 무선 통신 시스템에서 데이터 전송 방법에 있어서,
SRS(Sounding Reference Signal) 서브프레임에서 복수의 구성 반송파(CC; Component Carrier) 중 제1 CC에 할당된 제1 PUSCH(Physical Uplink Shared Channel) 자원을 통하여 상향링크 데이터를 전송하는 것을 포함하되,
상기 SRS 서브프레임에서 상기 복수의 CC 중 제2 CC는 SRS전송을 위하여 유보된(reserved) SRS SC-FDMA(Single Carrier-Frequency Division Multiple Access) 심벌을 포함하는 것을 특징으로 하는 데이터 전송 방법. - 제 1 항에 있어서,
상기 SRS SC-FDMA 심벌은 상기 SRS 서브프레임의 마지막 SC-FDMA 심벌인 것을 특징으로 하는 데이터 전송 방법. - 제 1 항에 있어서,
상기 제1 PUSCH 자원은 상기 SRS 서브프레임의 모든 SC-FDMA 심벌을 포함하는 것을 특징으로 하는 데이터 전송 방법. - 제 3 항에 있어서,
상기 SRS SC-FDMA 심벌을 통하여 SRS가 전송되지 않는 것을 특징으로 하는 데이터 전송 방법. - 제 1 항에 있어서,
상기 제1 PUSCH 자원은 상기 SRS SC-FDMA 심벌을 제외한 상기 SRS 서브프레임의 모든 SC-FDMA 심벌을 포함하는 것을 특징으로 하는 데이터 전송 방법. - 제 5 항에 있어서,
상기 PUSCH는 상기 SRS SC-FDMA 심벌을 제외하고 레이트 매칭(rate-matching)되는 것을 특징으로 하는 데이터 전송 방법. - 제 5 항에 있어서,
상기 SRS SC-FDMA 심벌을 통하여 SRS를 전송하는 것을 더 포함하는 것을 특징으로 하는 데이터 전송 방법. - 제 1 항에 있어서,
상기 SRS 서브프레임은 단말 특정(UE-specific) SRS 파라미터(parameter)에 의해 설정되는 복수의 주기적(periodic) 또는 비주기적(aperiodic) 단말 특정 SRS 서브프레임 중 어느 하나인 것을 특징으로 하는 데이터 전송 방법. - 제 8 항에 있어서,
상기 단말 특정 SRS 파라미터는 상기 복수의 주기적 또는 비주기적 단말 특정 SRS 서브프레임의 주기 및 오프셋(offset)을 지시하는 것을 특징으로 하는 데이터 전송 방법. - 제 8 항에 있어서,
상기 복수의 주기적 또는 비주기적 단말 특정 SRS 서브프레임은 셀 특정(cell-specific) SRS 파라미터에 의해 설정되는 복수의 셀 특정 SRS 서브프레임의 부분 집합인 것을 특징으로 하는 데이터 전송 방법. - 제 1 항에 있어서,
상기 SRS 서브프레임은 셀 특정 SRS 파라미터에 의해 설정되는 복수의 셀 특정 SRS 서브프레임 중 어느 하나인 것을 특징으로 하는 데이터 전송 방법. - 제 1 항에 있어서,
상기 SRS 서브프레임에서 상기 제2 CC에 할당된 제2 PUSCH 자원을 통하여 상향링크 데이터를 전송하는 것을 더 포함하는 것을 특징으로 하는 데이터 전송 방법. - 제 1 항에 있어서,
상기 SRS SC-FDMA 심벌의 일부 또는 전부의 대역폭이 상기 SRS의 전송을 위하여 할당되는 것을 특징으로 하는 데이터 전송 방법. - 제 1 항에 있어서,
상기 제1 PUSCH 자원은 RRC(Radio Resource Control) 메시지에 의하여 지시되는 것을 특징으로 하는 데이터 전송 방법. - 무선 통신 시스템에서,
SRS(Sounding Reference Signal) 서브프레임에서 복수의 구성 반송파(CC; Component Carrier) 중 제1 CC에 할당된 제1 PUSCH(Physical Uplink Shared Channel) 자원을 통하여 상향링크 데이터를 전송하는 RF(Radio Frequency)부; 및
상기 RF부와 연결되는 프로세서를 포함하되,
상기 SRS 서브프레임에서 상기 복수의 CC 중 제2 CC는 SRS의 전송을 위하여 유보된(reserved) SRS SC-FDMA(Single Carrier-Frequency Division Multiple Access) 심벌을 포함하는 것을 특징으로 하는 단말.
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