WO2012124996A2 - 신호 송수신 방법 및 이를 위한 장치 - Google Patents
신호 송수신 방법 및 이를 위한 장치 Download PDFInfo
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- WO2012124996A2 WO2012124996A2 PCT/KR2012/001886 KR2012001886W WO2012124996A2 WO 2012124996 A2 WO2012124996 A2 WO 2012124996A2 KR 2012001886 W KR2012001886 W KR 2012001886W WO 2012124996 A2 WO2012124996 A2 WO 2012124996A2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1854—Scheduling and prioritising arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1861—Physical mapping arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1822—Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1825—Adaptation of specific ARQ protocol parameters according to transmission conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
- H04L1/1864—ARQ related signaling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
- H04L1/1896—ARQ related signaling
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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 signalling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/104—Peer-to-peer [P2P] networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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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
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to a wireless communication system, and more particularly, to a method and apparatus for transmitting and receiving signals in a system that simultaneously supports frequency division duplex (FDD) and time division duplex (TDD).
- FDD frequency division duplex
- TDD time division duplex
- Wireless communication systems are widely deployed to provide various kinds of communication services such as voice and data.
- a wireless communication system is a multiple access system capable of supporting communication with multiple users by sharing available system resources (bandwidth, transmission power, etc.).
- multiple access systems include code division multiple access (CDMA) systems, frequency division multiple access (FDMA) systems, time division multiple access (TDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, and single carrier frequency (SC-FDMA). division multiple access) system.
- 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
- a method for transmitting a UL signal according to a normal HARQ (Hybrid Automatic Repeat and reQuest) operation in a wireless communication system supporting carrier aggregation FDD (Frequency) Configuring a first serving cell configured as a division duplex and a second serving cell configured as a time division duplex (TDD); Receiving a Physical HARQ Indicator CHannel (PHICH) signal in subframe # (nml) of the first serving cell or receiving a Physical Downlink Control CHannel (PDCCH) signal in subframe # (nm) of the first serving cell ; And transmitting a Physical Uplink Shared CHannel (PUSCH) signal in subframe #n of the second serving cell in response to the PHICH signal or the PDCCH signal, n is an integer of 0 or more, and m is 1 or more. An integer is provided and l is an integer of 1 or more.
- a radio frequency (Radio) Frequency (RF) unit configured to transmit an uplink signal according to a normal HARQ (Hybrid Automatic Repeat and reQuest) operation in a wireless communication system supporting carrier aggregation;
- RF radio frequency
- the processor configures a first serving cell configured with frequency division duplex (FDD) and a second serving cell configured with time division duplex (TDD), and subframe # (nml) of the first serving cell Receives a PHICH (Physical HARQ Indicator CHannel) signal or a PDCCH (Physical Downlink Control CHannel) signal in subframe # (nm) of the first serving cell, and corresponding to the PHICH signal or the PDCCH signal,
- a UE is configured to transmit a Physical Uplink Shared CHannel (PUSCH) signal in subframe #n of the second serving cell, n is an integer of 0 or more, m is an integer of 1 or more, and l is an integer
- the PHICH signal, the PDCCH signal and the PUSCH signal may correspond to the same HARQ process.
- the subframe # (n-m-l), the subframe # (n-m) and the subframe #n may correspond to the same HARQ process.
- 2m + l may correspond to a round trip time (RTT) of the HARQ process.
- RTT round trip time
- m is 4 and l may be 2.
- the present invention it is possible to efficiently transmit and receive signals in a wireless communication system.
- 1 illustrates the structure of a radio frame.
- FIG. 2 illustrates a resource grid of a downlink slot.
- 3 shows a structure of a downlink subframe.
- TDD UL ACK / NACK Uplink Acknowledgement / Negative Acknowledgement
- TISCH TDD Physical Uplink Shared CHannel
- FIG. 11 illustrates a TDD HARQ process in a single cell situation.
- CA 12 illustrates a Carrier Aggregation (CA) communication system.
- FIG. 13 illustrates scheduling when a plurality of carriers are merged.
- FIG. 15 illustrates physical hybrid automatic repeat and request indicator channel (PHICH) timing according to an embodiment of the present invention.
- PHICH physical hybrid automatic repeat and request indicator channel
- FIG. 16 illustrates an HARQ process according to an embodiment of the present invention.
- FIG. 17 illustrates a base station and a terminal that can be applied to an embodiment of the present invention.
- 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.
- UTRA is part of the Universal Mobile Telecommunications System (UMTS).
- 3rd Generation Partnership Project (3GPP) long term evolution (LTE) employs OFDMA in downlink and SC-FDMA in uplink as part of Evolved UMTS (E-UMTS) using E-UTRA.
- LTE-A Advanced is an evolution of 3GPP LTE.
- 1 illustrates the structure of a radio frame.
- a radio frame used in 3GPP LTE has a length of 10 ms (307200 Ts) and consists of 10 equally sized subframes. Ten subframes within a radio frame may be assigned a number.
- Each subframe has a length of 1 ms and consists of two slots. Twenty slots in a radio frame may be sequentially numbered from 0 to 19. Each slot is 0.5ms long.
- the time for transmitting the subframe is defined as a transmission time interval (TTI).
- the time resource may be classified by a radio frame number (also called a radio frame index), a subframe number (also called a subframe number), a slot number (or slot index), and the like.
- the radio frame may be configured differently according to the duplex mode.
- FDD frequency division duplex
- TDD time division duplex
- a radio frame since downlink transmission and uplink transmission are separated by time, a radio frame includes both a downlink subframe and an uplink subframe for a specific frequency band.
- Figure 1 shows a radio frame structure for TDD used in 3GPP LTE (-A).
- Table 1 illustrates UL-DL configuration (Uplink-Downlink Configuration) of subframes in a radio frame in the TDD mode.
- D represents a downlink subframe
- U represents an uplink subframe
- S represents a special subframe.
- the special subframe includes a downlink pilot time slot (DwPTS), a guard period (GP), and an uplink pilot time slot (UpPTS).
- DwPTS is a time interval reserved for downlink transmission
- UpPTS is a time interval reserved for uplink transmission.
- Table 2 illustrates the configuration of a special subframe.
- FIG. 2 illustrates a resource grid of a downlink slot.
- the downlink slot includes a plurality of OFDM symbols in the time domain.
- One downlink slot may include 7 (6) OFDM symbols, and the resource block may include 12 subcarriers in the frequency domain.
- Each element on the resource grid is referred to as a resource element (RE).
- One RB contains 12x7 (6) REs.
- the number of RBs included in the downlink slot NRB depends on the downlink transmission band.
- the structure of an uplink slot is the same as that of a downlink slot, and an OFDM symbol is replaced with an SC-FDMA symbol.
- 3 illustrates a structure of a downlink subframe.
- up to three (4) OFDM symbols located at the front of the first slot of a subframe correspond to a control region to which a control channel is allocated.
- the remaining OFDM symbols correspond to data regions to which the Physical Downlink Shared CHannel (PDSCH) is allocated.
- the PDSCH is used to carry a transport block (TB) or a codeword (CodeWord, CW) corresponding thereto.
- a transport block refers to a data block transferred from a medium access control (MAC) layer to a physical (PHY) layer through a transport channel.
- the codeword corresponds to the encoded version of the transport block. Correspondence between the transport block and the codeword may vary according to swapping.
- a PDSCH, a transport block, and a codeword are mixed with each other.
- Examples of a downlink control channel used in LTE (-A) include a Physical Control Format Indicator Channel (PCFICH), a Physical Downlink Control Channel (PDCCH), a Physical Hybrid ARQ Indicator Channel (PHICH), and the like.
- the PCFICH is transmitted in the first OFDM symbol of a subframe and carries information about the number of OFDM symbols used for transmission of a control channel within the subframe.
- the PHICH carries a HARQ-ACK (Hybrid Automatic Repeat reQuest Acknowledgment) signal in response to uplink transmission.
- HARQ-ACK Hybrid Automatic Repeat reQuest Acknowledgment
- HARQ-ACK response includes a positive ACK (simple, ACK), negative ACK (Negative ACK, NACK), DTX (Discontinuous Transmission) or NACK / DTX.
- HARQ-ACK is mixed with HARQ ACK / NACK, ACK / NACK.
- DCI downlink control information
- Tx uplink transmission
- Information contents of a transmission mode and a DCI format for configuring a multi-antenna technology are as follows.
- Transmission mode 1 Transmission from a single base station antenna port
- Transmission mode 7 Transmission using UE-specific reference signals
- Format 1D Compact resource assignments for PDSCH using multi-user MIMO (mode 5)
- the PDCCH includes a transmission format and resource allocation information of a downlink shared channel (DL-SCH), a transmission format and resource allocation information of an uplink shared channel (UL-SCH), and paging.
- Px information on paging channel (PCH) Px information on paging channel (PCH), system information on DL-SCH, resource allocation information of upper-layer control message such as random access response transmitted on PDSCH, Tx power control command set for individual terminals in terminal group , Tx power control command, activation indication information of Voice over IP (VoIP), and the like.
- a plurality of PDCCHs may be transmitted in the control region.
- the terminal may monitor the plurality of PDCCHs.
- the PDCCH is transmitted on an aggregation of one or a plurality of consecutive control channel elements (CCEs).
- CCEs control channel elements
- the CCE is a logical allocation unit used to provide a PDCCH with a coding rate based on radio channel conditions.
- the CCE corresponds to a plurality of resource element groups (REGs).
- the format of the PDCCH and the number of PDCCH bits are determined according to the number of CCEs.
- the base station determines the PDCCH format according to the DCI to be transmitted to the terminal, and adds a cyclic redundancy check (CRC) to the control information.
- the CRC is masked with an identifier (eg, a radio network temporary identifier (RNTI)) according to the owner or purpose of use of the PDCCH.
- RNTI radio network temporary identifier
- an identifier eg, cell-RNTI (C-RNTI)
- C-RNTI cell-RNTI
- P-RNTI paging-RNTI
- SI-RNTI system information RNTI
- RA-RNTI random access-RNTI
- FIG. 4 illustrates a structure of an uplink subframe used in LTE.
- the uplink subframe includes a plurality of slots (eg, two).
- the slot may include different numbers of SC-FDMA symbols according to a cyclic prefix length.
- the uplink subframe is divided into a data region and a control region in the frequency domain.
- the data area includes a PUSCH and is used to transmit a data signal such as voice.
- the control region includes a PUCCH and is used to transmit uplink control information (UCI).
- UCI uplink control information
- the PUCCH includes RB pairs located at both ends of the data region on the frequency axis and hops to a slot boundary.
- PUCCH may be used to transmit the following control information.
- SR Service Request: Information used for requesting an uplink UL-SCH resource. It is transmitted using OOK (On-Off Keying) method.
- HARQ-ACK A response to a downlink data packet (eg, a codeword) on a PDSCH. Indicates whether the downlink data packet was successfully received.
- One bit of HARQ-ACK is transmitted in response to a single downlink codeword, and two bits of HARQ-ACK are transmitted in response to two downlink codewords.
- HARQ-ACK responses include positive ACK (simply ACK), negative ACK (NACK), DTX or NACK / DTX.
- HARQ-ACK is mixed with HARQ ACK / NACK, ACK / NACK.
- CSI Channel State Information
- MIMO Multiple Input Multiple Output
- RI rank indicator
- PMI precoding matrix indicator
- the amount of control information (UCI) that a UE can transmit in a subframe depends on the number of SC-FDMA available for control information transmission.
- SC-FDMA available for transmission of control information means the remaining SC-FDMA symbol except for the SC-FDMA symbol for transmitting the reference signal in the subframe, and in the case of the subframe in which the Sounding Reference Signal (SRS) is set, the last of the subframe SC-FDMA symbols are also excluded.
- the reference signal is used for coherent detection of the PUCCH.
- PUCCH supports various formats according to the transmitted information.
- Table 3 shows a mapping relationship between PUCCH format and UCI in LTE (-A).
- UL ACK / NACK means ACK / NACK transmitted in uplink in response to DL data (eg, PDSCH).
- the UE may receive one or more PDSCH signals on M DL subframes (SF) (S502_0 to S502_M-1). Each PDSCH signal is used to transmit one or a plurality (eg, two) TBs according to a transmission mode.
- a PDCCH signal indicating a Semi-Persistent Scheduling release may also be received in steps S502_0 to S502_M-1. If there are PDSCH signals and / or SPS release PDCCH signals in the M DL subframes, the UE goes through a process for transmitting ACK / NACK (eg, ACK / NACK (payload) generation, ACK / NACK resource allocation, etc.).
- ACK / NACK is transmitted through one UL subframe corresponding to the M DL subframes.
- the ACK / NACK includes reception response information for the PDSCH signal and / or the SPS release PDCCH signal of steps S502_0 to S502_M-1.
- the ACK / NACK is basically transmitted through the PUCCH, but when there is a PUSCH transmission at the time of the ACK / NACK transmission, the ACK / NACK is transmitted through the PUSCH.
- Various PUCCH formats shown in Table 3 may be used for ACK / NACK transmission.
- various methods such as ACK / NACK bundling and ACK / NACK channel selection may be used to reduce the number of ACK / NACK bits transmitted through the PUCCH format.
- ACK / NACK for data received in M DL subframes is transmitted through one UL subframe (that is, M DL SF (s): 1 UL SF), and the relationship between them is It is given by the Downlink Association Set Index (DASI).
- DASI Downlink Association Set Index
- Table 4 shows DASI (K: ⁇ k0, k1, ... kM-1 ⁇ ) defined in LTE (-A).
- Table 4 shows an interval with a DL subframe associated with the UL subframe in which ACK / NACK is transmitted. Specifically, if there is a PDCCH indicating PDSCH transmission and / or semi-persistent scheduling release in subframe n-k (k ⁇ K), the UE transmits ACK / NACK in subframe n.
- FIG. 6 illustrates UL ACK / NACK transmission timing when UL-DL configuration # 1 is set.
- SF # 0 to # 9 and SF # 10 to # 19 correspond to radio frames, respectively.
- the number in the box in the figure represents the UL subframe associated with it in terms of DL subframes.
- the PUSCH may be transmitted corresponding to the PDCCH (UL grant) and / or PHICH (NACK).
- the terminal may receive a PDCCH (UL grant) and / or a PHICH (NACK) (S702).
- NACK corresponds to the ACK / NACK response to the previous PUSCH transmission.
- the UE performs a process for PUSCH transmission (eg, TB encoding, TB-CW swapping, PUSCH resource allocation, etc.), and then initializes / retransmits one or a plurality of TBs through the PUSCH after k subframes. It may be (S704).
- This example assumes a normal HARQ operation in which a PUSCH is transmitted once.
- the PHICH / UL grant corresponding to the PUSCH transmission is present in the same subframe.
- PHICH / UL grants corresponding to the PUSCH transmission may exist in different subframes.
- Table 5 shows an Uplink Association Index (UAI) (k) for PUSCH transmission in LTE (-A).
- UAI Uplink Association Index
- Table 5 shows the interval with the UL subframe associated with the DL subframe from which the PHICH / UL grant is detected. Specifically, if a PHICH / UL grant is detected in subframe n, the UE can transmit a PUSCH in subframe n + k.
- SF # 0 to # 9 and SF # 10 to # 19 correspond to radio frames, respectively.
- the number in the box in the figure represents the UL subframe associated with it in terms of DL subframes.
- PUSCH-PHICH / UL grant timing show PUSCH-PHICH / UL grant timing.
- PHICH is used to transmit DL ACK / NACK.
- DL ACK / NACK means ACK / NACK transmitted in downlink in response to UL data (eg, PUSCH).
- the terminal transmits a PUSCH signal to the base station (S902).
- the PUSCH signal is used to transmit one or a plurality (eg, two) TBs according to a transmission mode.
- the base station performs a process (eg, ACK / NACK generation, ACK / NACK resource allocation, etc.) for transmitting the ACK / NACK, and transmits the ACK / NACK to the terminal through the PHICH after the k subframe It may be (S904).
- the ACK / NACK includes reception response information for the PUSCH signal of step S902.
- the base station may transmit a UL grant PDCCH for PUSCH retransmission to the UE after k subframes (S904).
- This example assumes a normal HARQ operation in which a PUSCH is transmitted once.
- the PHICH / UL grant corresponding to the PUSCH transmission may be transmitted in the same subframe.
- PHICH / UL grant corresponding to PUSCH transmission may be transmitted in different subframes.
- Table 6 shows UAI (Uplink Association Index) (k) for PHICH / UL grant transmission in LTE (-A).
- Table 6 shows the interval with the UL subframe associated with the DL subframe in which the PHICH / UL grant exists.
- the PHICH / UL grant of subframe i corresponds to the PUSCH transmission of subframe i-k.
- SF # 0 to # 9 and SF # 10 to # 19 correspond to radio frames, respectively.
- the number in the box in the figure indicates the DL subframe associated with it in terms of UL subframes.
- K PHICH in FDD has a fixed value (eg, 4).
- K PHICH in TDD has a different value according to the UL-DL configuration.
- Table 7 shows the k PHICH values for TDD and is equivalent to Table 6.
- PHICH resources are given by [PHICH group index, orthogonal sequence index].
- the PHICH group index and the orthogonal sequence index are determined using the values of (i) the smallest PRB index used for PUSCH transmission and (ii) the value of the 3-bit field for the DeModulation Reference Signal (DMRS) cyclic shift. (i) (ii) is indicated by the L grant PDCCH.
- DMRS DeModulation Reference Signal
- Each HARQ process is associated with a HARQ buffer of a medium access control (MAC) layer.
- MAC medium access control
- Each HARQ process manages state variables related to the number of transmissions of the MAC Physical Data Block (PDU) in the buffer, HARQ feedback for the MAC PDU in the buffer, the current redundancy version, and the like.
- LTE (-A) FDD the number of UL HARQ processes for non-subframe bundling operation (ie, normal HARQ operation) is eight.
- LTE (-A) TDD the number of UL HARQ processes varies according to the UL-DL configuration.
- subframe bundling When subframe bundling is applied, a bundle of PUSCH transmissions consisting of four consecutive UL subframes is performed in FDD and TDD. Therefore, HARQ operation / process when subframe bundling is applied is different from the above-described normal HARQ operation / process.
- Table 8 shows the number of synchronous UL HARQ processes in TDD.
- the UE determines the subframe n + k according to the PDCCH and / or PHICH information (see Table 5). Transmits a corresponding PUSCH signal.
- MSB Most Significant Bit
- the terminal transmits a corresponding PUSCH signal in subframe n + 7.
- the UE transmits corresponding PUSCH signals in subframe n + k (see Table 5) and subframe n + 7.
- FIG. 11 illustrates a synchronous UL HARQ process when UL-DL configuration # 1 is set.
- the number in the box illustrates the UL HARQ process number.
- This example shows a normal UL HARQ process.
- HARQ process # 1 is involved in SF # 2, SF # 6, SF # 12, SF # 16.
- there are four UL HARQ processes having a round trip time (RTT) of 10 SFs (or 10 ms).
- RTT round trip time
- the LTE-A system uses a carrier aggregation or bandwidth aggregation technique that collects a plurality of uplink / downlink frequency blocks for a wider frequency band and uses a larger uplink / downlink bandwidth.
- Each frequency block is transmitted using a component carrier (CC).
- the component carrier may be understood as the carrier frequency (or center carrier, center frequency) for the corresponding frequency block.
- a plurality of uplink / downlink component carriers may be collected to support a wider uplink / downlink bandwidth.
- Each of the CCs may be adjacent or non-adjacent to each other in the frequency domain.
- the bandwidth of each component carrier can be determined independently. It is also possible to merge asymmetric carriers in which the number of UL CCs and the number of DL CCs differ. For example, in case of two DL CCs and one UL CC, the configuration may be configured to correspond to 2: 1.
- the DL CC / UL CC link may be fixed in the system or configured semi-statically.
- the frequency band that a specific UE can monitor / receive may be limited to M ( ⁇ N) CCs.
- Various parameters for carrier aggregation may be set in a cell-specific, UE group-specific or UE-specific manner.
- the control information may be set to be transmitted and received only through a specific CC.
- This specific CC may be referred to as a primary CC (PCC), and the remaining CC may be referred to as a secondary CC (SCC).
- PCC primary CC
- SCC secondary CC
- LTE-A uses the concept of a cell to manage radio resources.
- a cell is defined as a combination of downlink resources and uplink resources, and uplink resources are not required. Accordingly, the cell may be configured with only downlink resources or with downlink resources and uplink resources. If carrier aggregation is supported, the linkage between the carrier frequency (or DL CC) of the downlink resource and the carrier frequency (or UL CC) of the uplink resource may be indicated by system information.
- a cell operating on the primary frequency (or PCC) may be referred to as a primary cell (PCell), and a cell operating on the secondary frequency (or SCC) may be referred to as a secondary cell (SCell).
- PCell primary cell
- SCell secondary cell
- the PCell is used by the terminal to perform an initial connection establishment process or to perform a connection re-establishment process.
- the PCell may refer to a cell operating on a UL CC and an SIB2 linked DL CC through which control signals are transmitted.
- PCell may refer to a cell indicated in the handover process.
- the SCell is configurable after the RRC connection is established and can be used to provide additional radio resources.
- PCell and SCell may be collectively referred to as a serving cell. Therefore, in the case of the UE that is in the RRC_CONNECTED state, but carrier aggregation is not configured or does not support carrier aggregation, there is only one serving cell configured only with the PCell.
- the network may configure one or more SCells for the UE supporting carrier aggregation in addition to the PCell initially configured in the connection establishment process.
- each DL CC can transmit only the PDCCH scheduling its PDSCH without CIF according to the LTE PDCCH rule (non-cross-CC scheduling).
- CIF Carrier Indicator Field
- a specific CC schedules PDSCH of DL CC A using CIF. Not only PDCCH but also PDCCH scheduling PDSCH of another CC may be transmitted (cross-CC scheduling). On the other hand, PDCCH is not transmitted in DL CC B / C.
- the specific CC (or cell) used to transmit the PDCCH is referred to as the scheduling CC (or cell).
- the scheduling CC (or cell) may be mixed with the PDCCH monitoring CC (or cell).
- a CC (or a cell) in which a PDSCH / PUSCH is scheduled by a PDCCH of another CC is referred to as a scheduled CC (or a cell).
- One or more scheduling CCs may be configured for one UE, and one of these scheduling CCs may be configured to be dedicated to DL control signaling and UL PUCCH transmission. That is, the scheduling CC includes a PCC, and when there is only one scheduling CC, the scheduling CC may be equivalent to the PCC.
- the CC to which a signal is transmitted is defined as follows according to the type of signal.
- PDCCH (UL / DL grant): scheduling CC
- PDSCH / PUSCH CC indicated by CIF of PDCCH detected in scheduling CC
- DL ACK / NACK eg PHICH
- Scheduling CC eg DL PCC
- UL ACK / NACK (e.g. PUCCH): UL PCC
- the existing CA system considers only the case where the merged CCs all operate in the same duplex mode (that is, FDD or TDD). In addition, when operating in the TDD mode, only the case where all the merged CC has the same UL-DL configuration is considered. Therefore, in the existing CA system, since the DL / UL transmission timing is the same in all CCs, there is no problem in transmission / reception timing of signals (eg, UL grant, PHICH, etc.) during cross-CC scheduling.
- signals eg, UL grant, PHICH, etc.
- a system following LTE-A considers merging of multiple CCs operating in different duplex schemes. For example, in order to optimize DL / UL control signaling, a situation may be considered in which a DL / UL CC pair operating in FDD is set as a DL / UL PCC pair and a CC operating in TDD is set as an SCC. In this case, since the DL / UL transmission timing is different from the CC (for example, PCC) operating in FDD and the CC operating in TDD, signal transmission / reception timing and related problems may occur when cross-CC scheduling.
- CC for example, PCC
- the present invention also proposes a HARQ process when the FDD CC and the TDD CC are merged.
- embodiments of the present invention will be described assuming only merging of two CCs (i.e., one FDD PCC and one TDD SCC) set to different duplexes, but embodiments of the present invention merge and schedule three or more CCs.
- the duplex mode of the CC and the scheduled CC may be different.
- embodiments of the present invention are applied in common for all merged CCs, or in common for only CC (s) in which cross-CC scheduling is actually performed, or a pair of CCs (i.e., scheduling CCs and non-scheduled CCs). Can be applied independently as a unit.
- the present invention may be equally or similarly applied to merging between CC groups having different duplex schemes.
- the CC group may include one or more CCs or CC pairs.
- PCC corresponds to the scheduling CC and the SCC corresponds to the scheduled CC.
- PCC operates in FDD and the SCC operates in TDD.
- DC means DL CC
- UC means UL CC.
- PCC DC may mean PCC DL CC
- PCC UC may mean PCC UL CC.
- D means DL subframe (SF) or special SF
- U defines UL SF.
- SCC D may mean DL SF or special SF on SCC
- SCC U may mean UL SF on SCC.
- the CC may be mixed with the cell (or serving cell), the PCC may be mixed with the PCell, and the SCC may be mixed with the SCell.
- the signal transmission and reception process is described mainly in the case where the performing entity is a terminal. However, this is for convenience of description, and when the performing entity is given to the base station (or relay), the same content may be applied in the following description, only the direction of signal transmission and reception is changed.
- the UL grant timing may mean a time relationship between the UL grant and the PUSCH.
- the UL grant timing may be defined as a time interval (eg, SF or ms) between the UL grant and the PUSCH.
- the UL grant timing is g SF (s).
- the UL grant timing is g SF (s).
- the corresponding PUSCH is transmitted in SF # (h + g).
- a PUSCH is transmitted in SF #h
- a corresponding UL grant is received in SF # (h-g).
- the UL grant timing may mean a reception time of a UL grant corresponding to a PUSCH transmission.
- the UL grant timing may mean SF # (h-g). Accordingly, the UL grant timing may be interpreted as meaning a time relationship between the UL grant and the PUSCH or a UL grant transmission / reception time point according to the context.
- the UL grant timing for PUSCH transmitted through SF #h in UC may be fixed to SF # (hm) in DC.
- m may mean a minimum SF interval (eg, 4 SFs or 4 ms) between a UL grant reception time and a PUSCH transmission time accordingly.
- the UL grant timing for the PUSCH transmitted through the UL SF #h in the CC may be given as DL SF # (hk UG ) in the same CC.
- the TDD UL grant timing may refer to FIGS. 7 to 8.
- k UG may be given based on the UL SF on which the PUSCH is transmitted or may be defined based on the DL SF on which the UL grant is received. If k UG is defined based on the DL SF received the UL grant may be given as shown in Table 5.
- this example proposes a UL grant timing configuration method when cross-CC scheduling is configured in different duplex-based CAs.
- This example assumes that the PCC operates in FDD and the SCC operates in TDD. Accordingly, DL / UL is present in every SF in the PCC, whereas UL SF timing is defined in the SCC according to the UL-DL configuration (Table 1).
- the PU grant (hereinafter, SCC PUSCH) transmitted through the U (SF # n) of the SCC may be considered to set the UL grant timing in the PCC DC as follows.
- FDD UL grant timing (eg, PCC UL grant timing) may be applied to an SCC PUSCH on a TDD CC.
- FDD UL grant timing eg, PCC UL grant timing
- a PUSCH is transmitted through U (SF #n) of an SCC
- a corresponding UL grant may be received through SF # (n-m) of a PCC DC.
- a delay between a UL grant and a corresponding PUSCH can be reduced in a situation where a TDD CC operates.
- TDD UL grant timing (eg, SCC UL grant timing) may be applied to the SCC PUSCH on the TDD CC.
- SCC UL grant timing may be applied to the SCC PUSCH on the TDD CC.
- a PUSCH is transmitted through U (SF #n) of the SCC
- a corresponding UL grant may be received through SF # (nk UG ) of the PCC DC.
- k UG is given according to the TDD UL-DL configuration (eg, see Table 5).
- the existing UL grant-PUSCH timing set according to the DL-UL configuration can be reused as it is.
- the base station and the terminal may determine the UL grant timing using the CIF value of the UL grant PDCCH. For example, when the CIF value indicates the PCC, the UL grant timing may be determined using m, and when the CIF value indicates the SCC, the UL grant timing may be determined using k UG .
- FIG. 14 illustrates UL grant timing according to methods 1-1 and 1-2.
- This example illustrates a case in which the PCC and the SCC operate with FDD and TDD DL-UL configuration # 6 (Table 1), respectively.
- Method 1-1 it is not necessary to define the UL grant timing in the SF (eg, SF # (dm)) of the PCC DC corresponding to the D (eg, SF #d) of the SCC in terms of the UL grant timing. . Accordingly, the base station does not transmit a UL grant for the SCC in the SF of the PCC DC corresponding to the D of the SCC, and the terminal may also attempt blind decoding to receive the PDCCH under such assumption. For example, the UE may omit the blind decoding process for the UL DCI format (PUSCH scheduling information) in the search space for the SCC.
- PUSCH scheduling information PUSCH scheduling information
- the search space means a resource (area) including a plurality of PDCCH candidates to be monitored by the UE.
- the UE includes SF # (10N + 1), SF # (10N + 2), SF # (10N + 5), SF # (10N + 6), and SF # (10N of PCC DC.
- an operation eg, blind decoding
- the base station may omit DL grant transmission for the SCC.
- the UE may omit the PDCCH reception process (eg, blind decoding) itself for the SCC in SF # (d-m) of the PCC DC.
- the PDCCH reception process eg, blind decoding
- monitoring of the search space for the SCC may not be performed in SF # (d-g) of the PCC DC.
- the UE may omit a PDCCH reception process (eg, blind decoding) for SCC in SF # (10N + 2) and SF # (10N + 7) of the PCC DC.
- N is an integer of 0 or more.
- the UL grant for the SCC PUSCH may be received only in a subframe in which the SCC is D (eg, SF #d). Accordingly, the base station may not transmit the UL grant for the SCC over the PCC DC in the subframe where the SCC is U, and the UE may attempt blind decoding to receive the PDCCH under such assumption. For example, the UE may omit the blind decoding process for the UL DCI format (PUSCH scheduling information) in the search space for the SCC. In addition, the base station may not transmit the DL grant for the SCC through the PCC DC in the subframe SCC is U.
- DCI format PUSCH scheduling information
- the UE may omit the PDCCH reception process (eg, blind decoding) itself for the SCC in the subframe where the SCC is U.
- the UE may not monitor the search space for the SCC in the PCC DC in the subframe where the SCC is U.
- the UE includes SF # (10N + 2), SF # (10N + 3), SF # (10N + 4), SF # (10N + 7), and SF # (10N of PCC DC.
- a PDCCH reception process for example, blind decoding
- the PHICH timing may mean a time relationship between PUSCH and PHICH.
- the PHICH timing may be defined as a time interval (eg, SF or ms) between the PUSCH and the PHICH.
- the PHICH timing is p SF (s).
- the PHICH timing may mean a reception time of a PHICH corresponding to PUSCH transmission.
- the PHICH timing may mean SF # (h + p). Accordingly, the PHICH timing may be interpreted to mean a time relationship between a PUSCH and a PHICH or a time point for transmitting / receiving a PHICH according to a context.
- the PHICH timing for the PUSCH transmitted through SF #h in UC may be fixed to SF # (h + m) in DC.
- m denotes a minimum SF interval (eg, 4 SFs or 4 ms) between PUSCH transmission and PHICH reception timing accordingly.
- the PHICH timing for the PUSCH transmitted through UL SF #h may be given as DL SF # (h + k PHICH ).
- the TDD PHICH timing may refer to FIGS. 9 to 10, and k PHICH may be given as shown in Table 7, for example.
- this example proposes a PHICH timing setting method when cross-CC scheduling is configured in different duplex-based CAs.
- This example assumes that the PCC operates in FDD and the SCC operates in TDD. Accordingly, DL / UL is present in every SF in the PCC, whereas UL SF timing is defined in the SCC according to the UL-DL configuration (Table 1).
- PCC PUSCH PUSCH transmission
- SF # m m
- SCC PUSCH transmitted through the U (SF # n) of the SCC may be considered to set the PHICH timing in the PCC DC as follows.
- FDD PHICH timing (eg, PCC PHICH timing) may be applied to the SCC PUSCH on the TDD CC. For example, when a PUSCH is transmitted through U (SF #n) of an SCC, a corresponding PHICH may be received through SF # (n + m) of a PCC DC. According to the present method, a delay required for DL ACK / NACK feedback can be reduced for TDD-based PUSCH transmission.
- TDD PHICH timing (eg, SCC PHICH timing) may be applied to the SCC PUSCH on the TDD CC.
- SCC PHICH timing may be applied to the SCC PUSCH on the TDD CC.
- a PUSCH is transmitted through U (SF #n) of the SCC
- a corresponding PHICH may be received through SF # (n + k PHICH ) of the PCC DC.
- k PHICH is given according to the TDD UL-DL configuration (eg, see Table 7).
- the existing HARQ process timing set according to the UL-DL configuration can be reused as it is.
- the PHICH resource is determined using the smallest PRB index used for PUSCH transmission. Therefore, in Method 2-2, if the PUSCH transmitted through SCC U in SF #n and the PUSCH transmitted through PCC UC in SF # (n + k PHICH -4) use the same smallest PRB index, the PHICH resource is May crash. Accordingly, in order to prevent PHICH resource collision, the PHICH resource may be modified by using an offset value when determining the PHICH resource corresponding to the SCC PUSCH. For example, the offset value may be included in the form of a parameter in the formula for determining the PHICH resource index or may be applied in the form of PHICH resource index + offset.
- FIG. 15 illustrates PHICH timing according to methods 2-1 and 2-2.
- This example illustrates a case in which the PCC and the SCC operate with FDD and TDD DL-UL configuration # 1 (Table 1), respectively.
- the PHICH and the UL grant of the same subframe are allocated to the same HARQ process in the conventional HARQ process.
- k PHICH and k UG correspond to PHICH timing and UL grant timing, respectively.
- the RTT of the UL HARQ process is an example.
- this example proposes a method for configuring a UL HARQ process in a TDD CC.
- the PCC operates in FDD and the SCC operates in TDD.
- This example illustrates a normal HARQ process procedure.
- the HARQ process procedure when subframe bundling is applied is explicitly excluded.
- the number of PUSCH HARQ processes allocated to the TDD CC may be set equal to the number of UL SFs in 10 SFs (or ms) of Table 1.
- the illustrated UL HARQ process can be generalized as follows.
- R represents the RTT of the UL HARQ process.
- R is a positive integer and may be, for example, a multiple of 10.
- N and n are integers greater than or equal to zero.
- mPHICH and mUG correspond to PHICH timing and UL grant timing, respectively, and are integers of 1 or more.
- mPHICH and mUG may be defined the same or may be defined independently.
- mPHICH and mUG may both be defined as four.
- FIG. 16 illustrates an example of setting UL grant and PHICH timing for PUSCH scheduling of a TDD CC (eg, SCC) according to the present example.
- a TDD CC eg, SCC
- This example illustrates the case where the SCC is UL-DL configuration # 1 (Table 1).
- the SCC is UL-DL configuration # 1 (Table 1).
- four UL SFs are included within 10 [SFs or ms], and thus, the number of UL HARQ processes allocated to the SCC may also be set to four.
- UX PUSCH time
- PX PHICH time
- GX UL grant time
- X is an integer representing HARQ process index.
- SCC U (U1) of SF # 2 PCC DC (P1) of SF # 6, PCC DC (G1) of SF # 8, and SCC U (U1) of SF # 12 are UL HARQ process # 1.
- the PUSCH is transmitted through the SCC U of the SF # 2, and the corresponding PHICH may be received through the PCC DC in the SF # 6.
- a (retransmission) UL grant may be received via PCC DC of SF # 8
- a corresponding (retransmission) PUSCH may be transmitted via SCC U of SF # 12, respectively.
- Whether the PUSCH is initially transmitted or retransmitted may be determined according to whether the PHICH is received and the contents of the UL grant (eg, whether to toggle the NDI (New Data Indicator)).
- FIG. 17 illustrates a base station and a terminal that can be applied to the present invention.
- a relay When a relay is included in the wireless communication system, communication is performed between the base station and the relay in the backhaul link, and communication is performed between the relay and the terminal in the access link. Therefore, the base station or the terminal illustrated in the figure may be replaced with a relay according to the situation.
- a wireless communication system includes a base station (BS) 110 and a terminal (UE) 120.
- Base station 110 includes a processor 112, a memory 114, and a radio frequency (RF) unit 116.
- the processor 112 may be configured to implement the procedures and / or methods proposed in the present invention.
- the memory 114 is connected to the processor 112 and stores various information related to the operation of the processor 112.
- the RF unit 116 is connected with the processor 112 and transmits and / or receives a radio signal.
- the terminal 120 includes a processor 122, a memory 124, and an RF unit 126.
- the processor 122 may be configured to implement the procedures and / or methods proposed in the present invention.
- the memory 124 is connected with the processor 122 and stores various information related to the operation of the processor 122.
- the RF unit 126 is connected with the processor 122 and transmits and / or receives a radio signal.
- the base station 110 and / or the terminal 120 may have a single antenna or multiple antennas.
- embodiments of the present invention have been mainly described based on data transmission / reception relations between a terminal and a base station.
- Certain operations described in this document as being performed by a base station may in some cases be performed by an upper node thereof. That is, it is obvious that various operations performed for communication with the terminal in a network including a plurality of network nodes including a base station may be performed by the base station or other network nodes other than the base station.
- a base station may be replaced by terms such as a fixed station, a Node B, an eNode B (eNB), an access point, and the like.
- the terminal may be replaced with terms such as a user equipment (UE), a mobile station (MS), a mobile subscriber station (MSS), and the like.
- Embodiments according to the present invention may be implemented by various means, for example, hardware, firmware, software, or a combination thereof.
- an embodiment of the present invention may include one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), FPGAs ( field programmable gate arrays), processors, controllers, microcontrollers, microprocessors, and the like.
- ASICs application specific integrated circuits
- DSPs digital signal processors
- DSPDs digital signal processing devices
- PLDs programmable logic devices
- FPGAs field programmable gate arrays
- processors controllers, microcontrollers, microprocessors, and the like.
- an embodiment of the present invention may be implemented in the form of a module, procedure, function, etc. that performs the functions or operations described above.
- the software code may be stored in a memory unit and driven by a processor.
- the memory unit may be located inside or outside the processor, and may exchange data with the processor by various known means.
- the present invention can be used in a wireless communication device such as a terminal, a relay, a base station, and the like.
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Abstract
Description
Claims (10)
- 캐리어 병합(Carrier Aggregation)을 지원하는 무선 통신 시스템에서 단말이 보통(normal) HARQ(Hybrid Automatic Repeat and reQuest) 동작에 따라 상향링크 신호를 전송하는 방법에 있어서,FDD(Frequency Division Duplex)로 설정된 제1 서빙 셀과 TDD(Time Division Duplex)로 설정된 제2 서빙 셀을 구성하는 단계;상기 제1 서빙 셀의 서브프레임 #(n-m-l)에서 PHICH(Physical HARQ Indicator CHannel) 신호를 수신하거나, 상기 제1 서빙 셀의 서브프레임 #(n-m)에서 PDCCH(Physical Downlink Control CHannel) 신호를 수신하는 단계; 및상기 PHICH 신호 또는 상기 PDCCH 신호에 대응하여, 상기 제2 서빙 셀의 서브프레임 #n에서 PUSCH(Physical Uplink Shared CHannel) 신호를 전송하는 단계를 포함하고,n은 0 이상의 정수이고, m은 1 이상의 정수이며, l은 1 이상의 정수인 방법.
- 제1항에 있어서,상기 PHICH 신호, 상기 PDCCH 신호 및 상기 PUSCH 신호는 동일 HARQ 프로세스에 해당되는 방법.
- 제1항에 있어서,상기 서브프레임 #(n-m-l), 상기 서브프레임 #(n-m) 및 상기 서브프레임 #n은 동일 HARQ 프로세스에 해당되는 방법.
- 제1항에 있어서,2m+l은 HARQ 프로세스의 RTT(Round Trip Time)에 해당하는 방법.
- 제1항에 있어서,m은 4이고,l은 2인 방법.
- 캐리어 병합(Carrier Aggregation)을 지원하는 무선 통신 시스템에서 보통(normal) HARQ(Hybrid Automatic Repeat and reQuest) 동작에 따라 상향링크 신호를 전송하도록 구성된 단말에 있어서,무선 주파수(Radio Frequency, RF) 유닛; 및프로세서를 포함하고,상기 프로세서는 FDD(Frequency Division Duplex)로 설정된 제1 서빙 셀과 TDD(Time Division Duplex)로 설정된 제2 서빙 셀을 구성하고, 상기 제1 서빙 셀의 서브프레임 #(n-m-l)에서 PHICH(Physical HARQ Indicator CHannel) 신호를 수신하거나, 상기 제1 서빙 셀의 서브프레임 #(n-m)에서 PDCCH(Physical Downlink Control CHannel) 신호를 수신하며, 상기 PHICH 신호 또는 상기 PDCCH 신호에 대응하여, 상기 제2 서빙 셀의 서브프레임 #n에서 PUSCH(Physical Uplink Shared CHannel) 신호를 전송하도록 구성되고,n은 0 이상의 정수이고, m은 1 이상의 정수이며, l은 1 이상의 정수인 단말.
- 제6항에 있어서,상기 PHICH 신호, 상기 PDCCH 신호 및 상기 PUSCH 신호는 동일 HARQ 프로세스에 해당되는 방법.
- 제6항에 있어서,상기 서브프레임 #(n-m-l), 상기 서브프레임 #(n-m) 및 상기 서브프레임 #n은 동일 HARQ 프로세스에 해당되는 방법.
- 제6항에 있어서,2m+l은 HARQ 프로세스의 RTT(Round Trip Time)에 해당하는 방법.
- 제6항에 있어서,m은 4이고,l은 2인 방법.
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| US14/005,221 US9313776B2 (en) | 2011-03-15 | 2012-03-15 | Method for transmitting/receiving signal and device therefor |
| KR1020137025408A KR101915131B1 (ko) | 2011-03-15 | 2012-03-15 | 신호 송수신 방법 및 이를 위한 장치 |
| US15/060,918 US9673940B2 (en) | 2011-03-15 | 2016-03-04 | Method for transmitting/receiving signal and device therefor |
| US15/590,476 US9860025B2 (en) | 2011-03-15 | 2017-05-09 | Method for transmitting/receiving signal and device therefor |
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| US15/060,918 Continuation US9673940B2 (en) | 2011-03-15 | 2016-03-04 | Method for transmitting/receiving signal and device therefor |
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| WO2015020477A1 (ko) * | 2013-08-08 | 2015-02-12 | 주식회사 팬택 | Tdd 환경에서 다운링크 harq 타이밍을 제어하는 방법 및 장치 |
| US20150085720A1 (en) * | 2013-09-26 | 2015-03-26 | Qualcomm Incorporated | Reduced delay harq process timeline for fdd-tdd carrier aggregation |
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Also Published As
| Publication number | Publication date |
|---|---|
| US9313776B2 (en) | 2016-04-12 |
| US20170244523A1 (en) | 2017-08-24 |
| KR101915131B1 (ko) | 2018-11-05 |
| US9673940B2 (en) | 2017-06-06 |
| US20140003303A1 (en) | 2014-01-02 |
| US20160191213A1 (en) | 2016-06-30 |
| WO2012124996A3 (ko) | 2012-12-27 |
| US9860025B2 (en) | 2018-01-02 |
| KR20140010098A (ko) | 2014-01-23 |
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