WO2012039570A2 - Procédé d'affectation d'une ressource pucch pour l'émission d'un signal ack/nack, et appareil d'émission l'utilisant - Google Patents

Procédé d'affectation d'une ressource pucch pour l'émission d'un signal ack/nack, et appareil d'émission l'utilisant Download PDF

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Publication number
WO2012039570A2
WO2012039570A2 PCT/KR2011/006925 KR2011006925W WO2012039570A2 WO 2012039570 A2 WO2012039570 A2 WO 2012039570A2 KR 2011006925 W KR2011006925 W KR 2011006925W WO 2012039570 A2 WO2012039570 A2 WO 2012039570A2
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ack
resource
nack
index
resource allocation
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PCT/KR2011/006925
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Korean (ko)
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WO2012039570A3 (fr
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박동현
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주식회사 팬택
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Publication of WO2012039570A3 publication Critical patent/WO2012039570A3/fr

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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

Definitions

  • the present invention relates to wireless communication, and more particularly, to a wireless communication system supporting multiple carriers.
  • Wireless communication systems generally use one bandwidth for data transmission.
  • second generation wireless communication systems use a bandwidth of 200 KHz-1.25 MHz
  • third generation wireless communication systems use a bandwidth of 5 MHz-10 MHz.
  • LTE Long Term Evolution
  • 3GPP 3rd Generation Partnership Project
  • CA Carrier Aggregation for efficient use of fragmented small bands, which combines multiple physically non-contiguous bands in the frequency domain to produce the same effect as using logically large bands.
  • CA CA
  • Individual unit carriers bound by carrier aggregation are called component carriers (CC).
  • Each component carrier is defined by one bandwidth and a center frequency.
  • a system capable of transmitting and / or receiving data over a wide band through a plurality of component carriers is called a multiple component carrier system.
  • Multi-component carrier systems support narrowband and wideband simultaneously by using one or more carriers. For example, if one carrier corresponds to a bandwidth of 5 MHz, four carriers are used to support a bandwidth of up to 20 MHz.
  • various control signaling is required between a base station and a terminal. For example, an exchange of ACK (ACKnowledgement) / Not-ACKnowledgement (NACK) information for performing a hybrid automatic repeat request (HARQ), a channel quality indicator (CQI) indicating downlink channel quality, and the like are required.
  • ACK acknowledgement
  • NACK Not-ACKnowledgement
  • CQI channel quality indicator
  • a multi-component carrier system uses a plurality of uplink component carriers and a plurality of downlink component carriers, an apparatus and method for exchanging various control signaling between a base station and a terminal in such a communication environment are required.
  • An object of the present invention is to provide a method and apparatus for transmitting a HARQ ACK / NACK signal using a plurality of resources and a plurality of antennas in a multi-carrier system.
  • the technical problem to be solved by the present invention is to provide a method for allocating resources for transmitting HARQ ACK / NACK signal using a plurality of antennas in a multi-carrier system and a transmission apparatus using the same.
  • a method for receiving a downlink transport block through downlink assignment indicated by a downlink control channel the first ACK / based on at least one of resources used for transmission of the downlink control channel. Determining a NACK resource index and a second ACK / NACK resource index, and using the first ACK / NACK resource and the second ACK / NACK resource obtained from the first ACK / NACK resource index and the second ACK / NACK resource index.
  • a signal transmission method that can be allocated according to a resource allocation table configured by a combination of transmission symbols.
  • At least one resource index of the plurality of resource indexes constituting the resource allocation table may be determined based on a resource used for transmission of a downlink control channel.
  • the resource used for transmission of the downlink control channel includes at least one CCE, and at least one resource index of the plurality of resource indexes constituting the resource allocation table is the lowest CCE index among the CCE indexes for the at least one CCE. It can be determined based on.
  • the resource allocation table may include a resource index determined based on a previous CCE index or a subsequent CCE index of the lowest CCE index.
  • a plurality of resource indexes constituting the resource allocation table may be allocated by a higher layer.
  • the second ACK / NACK resource index may be allocated by an upper layer.
  • the second ACK / NACK resource index may be determined based on resources used for transmission of a downlink control channel.
  • a resource used for transmission of the downlink control channel includes at least one CCE, and the second ACK / NACK resource index is a CCE index that is not used as a basis for configuring a resource allocation table among CCE indexes for at least one CCE. It can be determined according to.
  • the second ACK / NACK resource index may be determined according to a resource index determined based on a previous CCE index or a subsequent CCE index of the lowest CCE index among the CCE indexes for at least one CCE.
  • a signal processing unit processing a signal transmitted through the RF unit, wherein the signal processing unit includes a first ACK / NACK resource index and a second ACK / NACK resource based on at least one of resources used for transmission of a downlink control channel.
  • the first ACK / NACK resource index is determined according to a resource allocation table consisting of a combination of a plurality of resource index and the transmission symbol of the ACK / NACK signal, the first ACK / NACK resource index and the second ACK / NACK
  • the first ACK / NACK resource and the second ACK / NACK resource are allocated from the resource index
  • the RF unit uses the first ACK / NACK resource and the second ACK / NACK resource to transmit ACK / NACK signals through a plurality of antennas.
  • the resource allocation table may be composed of resource indexes allocated by a higher layer.
  • At least one of the plurality of resource indexes constituting the resource allocation table may be a resource index determined based on a resource used for transmission of a downlink channel.
  • a method comprising receiving a downlink transport block from a base station through a downlink assignment indicated by a downlink control channel, a first based on at least one of the resources used for the downlink control channel Determining an ACK / NACK resource index and a second ACK / NACK resource index; and a second ACK / NACK resource obtained from the first ACK / NACK resource and the second ACK / NACK resource index; Transmitting an ACK / NACK signal for the downlink transport block to the base station through a plurality of antennas, wherein the first ACK / NACK resource index is based on a plurality of transmission bits of the ACK / NACK signal;
  • the resource allocation table is configured by a combination of a resource index and a modulation symbol of the ACK / NACK signal, and the second ACK / NACK resource index is And the terminal for the HARQ in a wireless communication system, which is determined in advance so as to indicate the fixed
  • the second ACK / NACK resource index may be determined by a higher layer.
  • the second ACK / NACK resource index may be determined based on an RRC message.
  • transmission diversity by a multi-antenna system may be obtained by transmitting the same ACK / NACK signal through different antennas using different transmission resources.
  • 1 illustrates a wireless communication system
  • FIG. 2 is a conceptual diagram schematically illustrating a method for transmitting downlink control information and scheduling between carriers in a multi-component carrier system.
  • FIG. 3 is an explanatory diagram illustrating a method of transmitting downlink control information in a multi-component carrier system according to an embodiment of the present invention.
  • FIG. 4 shows an example of an uplink subframe structure carrying an ACK / NACK signal.
  • Equation 6 shows an example of mapping a PUCCH to physical resource blocks according to Equation 6 above.
  • FIG. 7 shows an example of transmitting an ACK / NACK signal in multiple antennas.
  • FIG. 8 is a flowchart schematically illustrating a method for allocating PUCCH resources for ACK / NACK signal transmission according to the present invention.
  • FIG. 9 is a flowchart schematically showing an example of a method of allocating ACK / NACK resources according to the present invention.
  • FIG. 10 is a conceptual diagram schematically illustrating an effect of a CCE reservation method in an aggregation layer of a self-weighted carrier system.
  • 11 is a conceptual diagram schematically illustrating allocation of ACK / NACK resources on a PUCCH in a multi-component carrier system.
  • FIG. 12 is a block diagram schematically illustrating a wireless communication system in which an embodiment of the present invention is implemented.
  • the present specification describes a wireless communication system, the operation performed in the wireless communication system is performed in the process of controlling the network and transmitting data from the base station in charge of the wireless communication system, or the operation in the terminal coupled to the base station Can be done.
  • 1 illustrates a wireless communication system
  • the wireless communication system 10 is widely deployed to provide various communication services such as voice and packet data.
  • the wireless communication system 10 includes at least one base station (BS) 11.
  • Each base station 11 provides a communication service for a specific geographic area (generally called a cell) 15a, 15b, 15c.
  • the cell can in turn be divided into a number of regions (called sectors).
  • the mobile station (MS) 12 may be fixed or mobile, and may include a user equipment (UE), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, and a PDA. (personal digital assistant), wireless modem (wireless modem), a handheld device (handheld device) may be called other terms.
  • the base station 11 generally refers to a 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), and an access point.
  • eNB evolved-NodeB
  • BTS base transceiver system
  • the cell should be interpreted in a comprehensive sense of a part of the area covered by the base station 11 and encompasses various coverage areas such as megacells, macrocells, microcells, picocells and femtocells.
  • downlink means communication from the base station 11 to the terminal 12, and 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.
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier-FDMA
  • OFDM-FDMA OFDM-FDMA
  • OFDM-TDMA OFDM-TDMA
  • various multiple access schemes such as OFDM-CDMA may be used.
  • the uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, or may use a frequency division duplex (FDD) scheme that is transmitted using different frequencies.
  • TDD time division duplex
  • FDD frequency division duplex
  • Carrier aggregation supports a plurality of carriers, also referred to as spectrum aggregation or bandwidth aggregation.
  • Carrier aggregation is introduced to support increased throughput, to prevent cost increase due to the introduction of wideband radio frequency (RF) devices, and to ensure compatibility with existing systems. For example, if five component carriers are allocated as granularity in a carrier unit having a 5 MHz bandwidth, a bandwidth of up to 25 MHz may be supported.
  • Carrier aggregation may be divided into contiguous carrier aggregation between continuous component carriers in the frequency domain and non-contiguous carrier aggregation between discontinuous component carriers.
  • the number of carriers aggregated between the downlink and the uplink may be set differently. The case where the number of downlink component carriers and the number of uplink component carriers are the same is called symmetric aggregation, and the case where the numbers are different is called asymmetric aggregation.
  • the size (ie, bandwidth) of component carriers may be different from each other. For example, assuming that 5 component carriers are used for the configuration of the 70 MHz band, a 5 MHz component carrier (carrier # 0) + 20 MHz component carrier (carrier # 1) + 20 MHz component carrier (carrier # 2) It may be configured as a +20 MHz component carrier (carrier # 3) + 5 MHz component carrier (carrier # 4).
  • a multiple carrier system refers to a system supporting carrier aggregation.
  • Adjacent carrier aggregation and / or non-adjacent carrier aggregation may be used in a multi-carrier system, and either symmetric aggregation or asymmetric aggregation may be used.
  • the downlink control channel (Physical Downlink Control CHannel, hereinafter referred to as 'PDCCH') is associated with the resource allocation and PDSCH of the PCH (Paging CHannel) and downlink shared channel (hereinafter referred to as 'PDSCH') to the UE Informs HARQ information.
  • the PDCCH may carry an uplink grant that informs UE of resource allocation of uplink transmission and a downlink grant that informs resource allocation of downlink transmission.
  • the Physical Control Format Indicator CHannel is a physical channel for transmitting a format indicator indicating a format of a PDCCH, that is, a number of OFDM symbols constituting the PDCCH, to be included in every subframe.
  • the format indicator may be called a control format indicator (CFI).
  • the Physical Hybrid ARQ Indicator Channel carries HARQ ACK / NACK signals in response to uplink transmission.
  • Physical Uplink Control CHannel (PUCCH) carries uplink control information such as HARQ ACK / NACK for downlink transmission, scheduling request, Sounding Reference Signal (SRS), and CQI.
  • PUSCH Physical Uplink Shared CHannel
  • UL-SCH UpLink Shared CHannel
  • the frame for multi-carrier operation consists of 10 subframes.
  • the subframe includes a plurality of OFDM symbols.
  • Each carrier may have its own control channel (eg, PDCCH).
  • the multicarriers may or may not be adjacent to each other.
  • the terminal may support one or more carriers according to its capability.
  • the component carrier may be divided into a fully configured carrier and a partially configured carrier according to directionality.
  • a preset carrier refers to a carrier capable of transmitting and / or receiving all control signals and data on a bidirectional carrier
  • a partially configured carrier refers to a carrier capable of transmitting only downlink data on a unidirectional carrier.
  • Partially configured carrier may be mainly used in the Multicast and Broadcast Service (MBS) and / or Single Frequency Network (SFN).
  • the CC may be divided into a Primary Component Carrier (PCC) and a Secondary Component Carrier (SCC) according to activation.
  • the major carriers are always active carriers, and the subcarrier carriers are carriers that are activated / deactivated according to specific conditions. Activation refers to the transmission or reception of traffic data being made or in a ready state. Deactivation means that transmission or reception of traffic data is impossible, and measurement or transmission of minimum information is possible.
  • the terminal may use only one major carrier, or may use one or more subcomponent carriers together with the major carrier.
  • the terminal may be assigned a major carrier and / or sub-carrier carrier from the base station.
  • the major carrier may be a preset carrier file, and is a carrier through which main control information is exchanged between the base station and the terminal.
  • the subcarrier may be a preset carrier or a partial carrier, and is a carrier allocated according to a request of a terminal or an indication of a base station.
  • the major carriers may be used for network entry and / or subcarrier allocation of the terminal.
  • the major carriers may be selected from among preset carriers rather than being fixed to a specific carrier.
  • a carrier set as a subcarrier may also be changed to a major carrier.
  • FIG. 2 is a conceptual diagram schematically illustrating a method of transmitting downlink control information and cross-carrier scheduling in a multi-component carrier system.
  • a first component carrier CC1 a second component carrier CC2, and a third component carrier CC3 are provided to the terminal by carrier aggregation.
  • CC1 a major carrier
  • SCC subcomponent carriers
  • the downlink subframe of each CC includes a control area including at least one PDCCH and a data area including at least one PDSCH.
  • CC1 is composed of PDCCH1 510 and data region 511 for CC1
  • CC2 is composed of PDCCH2 520 and data region 521 for CC2
  • CC3 is PDCCH3 530 and CC data region for CC3. 531.
  • the number of OFDM symbols constituting the PDCCH is variable. For example, the number of OFDM symbols constituting the PDCCH1 501 and the PDCCH3 503 is three, and the number of OFDM symbols constituting the PDCCH2 502 is two.
  • a format indicator which indicates the PDCCH region corresponding to the PCC by the number of OFDM symbols through a PCFICH, and a higher layer such as an RRC (Radio Resource Control) layer.
  • RRC Radio Resource Control
  • Each component carrier may include a plurality of PDCCHs.
  • PDCCH 510 for CC1 includes PDCCH1 501, PDCCH2 502 and PDCCH3 503.
  • the UE may monitor the plurality of PDCCHs. That is, a blind decoding method is monitored using a specific Radio Network Temporary Identifier (RNTI) assigned to the self.
  • RNTI Radio Network Temporary Identifier
  • DCI downlink control information
  • 'DCI' downlink control information
  • Table 1 shows DCIs according to formats.
  • Table 1 DCI Format Description 0 used for the scheduling of PUSCH (Uplink grant)
  • DCI format 0 indicates uplink resource allocation information
  • DCI formats 1 to 2A indicate downlink resource allocation information
  • DCI formats 3 and 3A indicate uplink TPC (Transmit) for arbitrary UE groups. Power Control) command.
  • Each field of the DCI is sequentially mapped to an information bit.
  • the resource allocation field may be mapped to the 10th to 23rd bits of the information bits.
  • DCI includes uplink resource allocation information and downlink resource allocation information.
  • the uplink resource allocation information may be called an uplink grant, and the downlink resource allocation information may be called a downlink grant.
  • PDCCH1 501, PDCCH2 502 and PDCCH3 503 all transmit DCI in any one of DCI 1 / 1A / 1B / 1C / 1D / 2 / 2A. Accordingly, the resource allocation field included in these DCIs indicates the PDSCH of the specific component carrier. For example, DCI of PDCCH1 501 indicates PDSCH1 504 of CC1, DCI of PDCCH2 502 indicates PDSCH2 505 of CC2, and DCI of PDCCH3 503 indicates PDSCH3 506 of CC3. ).
  • the DCI information of the PDCCH may transmit allocation information for resources of other carriers as well as resource allocation in the carrier to which the PDCCH belongs. This is called cross-carrier scheduling. In the intercarrier scheduling, scheduling information is flexible because control information on subcarriers can be transmitted through a subcarrier.
  • a terminal receiving downlink data from a base station transmits ACK / NACK information after a predetermined time elapses.
  • the downlink data may be transmitted on the PDSCH indicated by the PDCCH.
  • the ACK / NACK signal becomes ACK information when the downlink data is successfully decoded, and becomes NACK information when the decoding of the downlink data fails.
  • the base station may retransmit the downlink data up to a maximum number of retransmissions.
  • the transmission time or resource allocation of the ACK / NACK signal for the downlink data may be dynamically informed by the base station through signaling, or may be previously determined according to the transmission time or resource allocation of the downlink data.
  • the terminal may measure the downlink channel state and report the CQI to the base station periodically and / or aperiodically.
  • the base station can be used for downlink scheduling using the CQI.
  • the base station may inform the terminal of the information about the transmission time or resource allocation of the CQI.
  • FIG. 4 shows an example of an uplink subframe structure carrying an ACK / NACK signal.
  • an uplink subframe may be divided into a control region to which a PUCCH carrying uplink control information is allocated and a data region to which a PUSCH carrying user data is allocated in the frequency domain.
  • SC-FDMA Single Carrier-FDMA
  • the PUCCH for one UE is allocated as a resource block pair (RB pair) in a subframe, and the allocated resource block pairs are resource blocks corresponding to different subcarriers in each of two slots.
  • the resource block pair allocated to the PUCCH is said to be frequency hopping at a slot boundary.
  • PUCCH may support multiple formats. That is, uplink control information having a different number of bits per subframe may be transmitted according to a modulation scheme.
  • Table 2 below shows modulation schemes and number of bits according to various PUCCH formats.
  • PUCCH format 1 is used to transmit a scheduling request (SR), and PUCCH format 1a / 1b is used to transmit a HARQ ACK / NACK signal.
  • PUCCH format 2 is used for transmission of CQI, and PUCCH format 2a / 2b is used for transmission of CQI and HARQ ACK / NACK.
  • PUCCH format 1a / 1b is used, and when the SR is transmitted alone, PUCCH format 1 is used.
  • Control information transmitted on the PUCCH uses a cyclically shifted sequence.
  • a cyclically shifted sequence is a cyclic shift of a base sequence by a specific cyclic shift amount.
  • a sequence of length 12 as shown in Equation 1 below is used as a base sequence.
  • the basic sequence r (n) may be cyclically shifted as in Equation 2.
  • 'a' represents a cyclic shift (CS) amount
  • 'mod' represents a modulo operation
  • RS Reference Signal
  • ACK / NACK signals are carried on the remaining 4 SC-FDMA symbols.
  • the RS is carried in three contiguous SC-FDMA symbols in the middle of the slot.
  • a 2-bit ACK / NACK signal is modulated by Quadrature Phase Shift Keying (QPSK) to generate one modulation symbol d (0).
  • QPSK Quadrature Phase Shift Keying
  • a modulated sequence y (n) is generated based on the modulation symbol d (0) and the cyclically shifted sequence r (n, a).
  • the following modulated sequence y (n) may be generated by multiplying a cyclically shifted sequence r (n, a) by a modulation symbol.
  • the CS amount of the cyclically shifted sequence r (n, a) may be different for each SC-FDMA symbol and may be the same.
  • the CS amounts a are sequentially set to 0, 1, 2, and 3 for 4 SC-FDMA symbols in one slot, but this is merely an example.
  • one modulation symbol may be generated by performing a binary phase shift keying (BPSK) modulation on a 1-bit ACK / NACK signal.
  • BPSK binary phase shift keying
  • the number of bits, modulation scheme, and number of modulation symbols of the ACK / NACK signal are only examples, and do not limit the technical spirit of the present invention.
  • the modulated sequence may be spread again using an orthogonal sequence (OS).
  • Resource Index n which is a resource for transmission of PUCCH format 1 / 1a / 1b (1)
  • PUCCH is not only the position of the physical resource block to which the A / N signal is transmitted, but also the CS amount ⁇ (n s ,) of the basic sequence. l) and orthogonal sequence index n OC (n s ).
  • the resource index n (1) PUCCH for the HARQ ACK / NACK signal is obtained as shown in Table 6 below.
  • the resource index n (1) PUCCH is a parameter for determining a physical RB index n PRB , a CS amount ⁇ (n s , l) of the base sequence, and an orthogonal sequence index n OC (n s ).
  • the HARQ ACK / NACK signal for the PDSCH transmitted in the nth subframe is the first CCE (Control Channel Element) index n CCE of the PDCCH transmitted in the nth subframe and higher layer signaling. Or, it is transmitted in the n + 4th subframe using the resource index n (1) PUCCH which is the sum of the value N (1) PUCCH obtained through a separate control channel.
  • N (1) PUCCH is the total number of PUCCH format 1 / 1a / 1b resources required for Semi-Persistent Scheduling (SPS) transmission and Service Request (SR) transmission.
  • SPS Semi-Persistent Scheduling
  • SR Service Request
  • the physical RB index n PRB is determined by the resource index n (1) PUCCH . This is shown in Equation 6 below.
  • Equation 6 shows an example of mapping a PUCCH to physical RBs according to Equation 6 above.
  • PUCCH and determines a physical RB n PRB index, PUCCH corresponding to the respective m is frequency hopping (hopping) to the slots.
  • one n CCE is allocated to one PDCCH.
  • the UE Upon receiving one PDSCH indicated by the PDCCH, the UE transmits an ACK / NACK signal for the PDSCH through a PUCCH resource based on n CCE .
  • 7 is a configuration diagram schematically showing an example of a transmission device for transmitting a HARQ ACK / NACK signal in multiple antennas.
  • 7 shows a multi-antenna transmission using two antennas, the present invention is not limited thereto, and the present invention may be applied to multi-antenna transmission using two or more antennas.
  • some configurations of the encoder, the mapper, the multiplexer, and the like will be omitted and described.
  • the symbol modulator 1110 modulates the ACK / NACK signal and outputs a modulation symbol.
  • the resource determiner 1120 allocates ACK / NACK resources to the first antenna 1140a and the second antenna 1140b for use in transmitting the ACK / NACK modulation symbol.
  • the result of resource allocation is transmitted to the spreaders 1130a and 1130b in the form of a resource index or the like, for example.
  • the first resource spreader 1130a spreads the ACK / NACK modulation symbol according to the resource allocation result of the resource determiner 1120 for the first antenna 1140a and transmits the same through the first antenna 1140a.
  • the second resource spreader 1130b spreads the ACK / NACK modulation symbol according to the resource allocation result of the resource determiner 1120 for the second antenna 1140b and transmits the same through the second antenna 1140b.
  • the ACK / NACK signal When the ACK / NACK signal is transmitted using multiple antennas, diversity can be obtained by transmitting the same ACK / NACK symbol using different resources through different antennas. However, since the same ACK / NACK signal is transmitted through different antennas, resource collisions should be prevented by allocating different ACK / NACK resources to each antenna.
  • an ACK / NACK resource is allocated to a first antenna according to a resource allocation table configured by a higher layer or a physical layer, and an ACK / NACK resource is allocated to a second antenna in a resource region not specified in a resource allocation table.
  • the upper layer may be either an RRC layer or a MAC layer.
  • resources may be allocated using a resource allocation table using PUCCH format 1 / 1a / 1b.
  • the resource allocation table may be configured in various ways, and may be configured differently according to the number of bits (M) used to transmit the ACK / NACK signal, or as one table to cover all the bits (M). May be Therefore, when using the resource allocation table for the ACK / NACK information of 4 bits or less in the carrier aggregation environment, when the M value is 2, 3, 4 can be configured by using the resource allocation table for ACK / NACK resource allocation.
  • the format of the resource allocation table is information previously known to the terminal and the base station.
  • the UE obtains the resource index for configuring the resource allocation table through the PDCCH or separate signaling or transport channel from the higher channel.
  • the resource allocation table is configured differently according to the M value (the number of bits used to transmit the ACK / NACK signal), and the number of resource indexes for configuring the resource allocation table depends on the M value.
  • the UE may be allocated two resource indexes for configuring the resource allocation table by an implicit resource allocation method, or both may be allocated by an explicit resource allocation method.
  • one resource index among two resource indexes for configuring the resource allocation table may be allocated by an implicit resource allocation method, and the other resource index may be allocated by an explicit resource allocation method.
  • the base station explicitly assigns the resource index to the terminal means that the resource index of the PUCCH dedicated to the specific terminal by separate signaling (for example, an RRC message) or the like from the base station without depending on n CCE is assigned to the terminal. It means to allocate.
  • the separate signaling from the base station includes signaling from an upper layer or a physical layer.
  • determining the resource index by this method is referred to as explicit resource allocation.
  • implicitly allocating a resource index means assigning a resource index calculated by using n CCE , which means the number of CCEs , as a parameter among at least one CCE constituting the PDCCH of CC # n which is the nth CC. .
  • determining the resource index in this manner is referred to as implicit resource allocation.
  • the resource allocation table may include a type of an ACK / NACK signal to be transmitted, an allocated resource corresponding thereto, and a symbol transmitted to the corresponding resource.
  • the M value may also be viewed as the number of downlink subframes associated with one uplink subframe.
  • the terminal loads a transmission symbol on a resource mapped according to the type of ACK / NACK signal to be transmitted and transmits it through an antenna.
  • the UE corresponds to a resource ( n (1) PUCCH ) matched according to the type of ACK / NACK signal to be transmitted on the ACK / NACK resource n (1) PUCCH in subframe n using PUCCH format 1a / 1b.
  • the symbols b (0) and b (1 ) are transmitted.
  • the terminal does not send an ACK / NACK response in subframe n.
  • the terminal may obtain three resource indexes for configuring the resource allocation table by an implicit resource allocation method, or may obtain three resource indexes by an explicit resource allocation method.
  • some of the three resource indexes for configuring the resource allocation table may be allocated in an implicit resource index allocation scheme, and the remaining necessary resource indexes may be allocated in an explicit resource index allocation scheme.
  • the case where the resource index is obtained by the implicit resource allocation method and the case where the resource index is obtained by the explicit resource allocation method is as described above.
  • Table 8 shows an example of a resource allocation table.
  • Channel selection applied to M 3 in the TDD scheme of LTE based on 3rd Generation Partnership Project (3GPP) Technical Specification (TS) Release 8 ) Table.
  • the UE carries an antenna by carrying symbols ( b (0), b (1) ) corresponding to resources ( n (1) PUCCH ) mapped according to types of ACK / NACK signals to be transmitted. Send it through.
  • the terminal may be allocated four resource indexes for configuring the resource allocation table by an implicit resource allocation method, or may obtain all four resource indexes by an explicit resource allocation method.
  • some resource indexes among the four resource indexes for configuring the resource allocation table may be allocated by an implicit resource index allocation method, and the remaining resource indexes may be allocated by an explicit resource index allocation method.
  • the case where the resource index is obtained by the implicit resource allocation method and the case where the resource index is obtained by the explicit resource allocation method is as described above.
  • Table 9 shows an example of a resource allocation table.
  • Channel selection applied when M 4 in the TDD scheme of LTE based on 3rd Generation Partnership Project (3GPP) Technical Specification (TS) Release 8 ) Table.
  • FIG. 8 is a flowchart schematically illustrating a method for allocating PUCCH resources for ACK / NACK signal transmission according to the present invention.
  • the terminal receives the PDCCH and PDSCH from the base station (step S100).
  • the PDCCH and PDSCH are transmitted on one major carrier (PCC) and one or more subcomponent carriers (SCC).
  • PCC major carrier
  • SCC subcomponent carriers
  • the ACK / NACK resource is allocated to the first antenna according to a resource allocation table, for example, a channel selection table (step S110).
  • a resource allocation table for example, a channel selection table (step S110).
  • the resource index needed to construct the resource allocation table is obtained by implicit resource allocation method or by explicit resource allocation method.
  • the configuration of the resource allocation table for n CCE that among CCE on the received PDCCH means the number of the first CCE to resource index n (1) PUCCH is allocated to the parameters accordingly to allocate the ACK / NACK resources have.
  • the resource index constituting the resource allocation table may be allocated through separate signaling (eg, an RRC message) from the base station, and the ACK / NACK resource may be allocated using the resource allocation table configured as described above.
  • some of the resource indexes necessary for configuring the resource allocation table may be allocated in an explicit resource allocation scheme, and some of them may be allocated in an implicit resource allocation scheme.
  • an ACK / NACK resource is allocated in a region that does not correspond to a resource allocation table such as a resource channel table, that is, in a region other than the region in which the channel selection table allocates the resources (step S120).
  • an area of resources that can be allocated using the resource allocation table and an area of resources that cannot be allocated to the resource allocation table may be distinguished and specified in advance.
  • the PDSCH transmits information of one transport block on two CCs, respectively (two Non-MIMO transmission modes) may be considered.
  • the transport block is also called a codeword.
  • the allocation of resources for the first antenna for transmitting the ACK / NACK signal is performed by using a resource allocation table.
  • M 2
  • two resource indexes (n (1) PUCCH ) are needed to construct a resource allocation table.
  • at least one or more of the two resource indexes are allocated by an implicit resource allocation method and a case in which both resource indexes are allocated by an explicit resource allocation method.
  • the present embodiment may be equally applicable to a case where M value is 2 and at least one of the resource indices required for configuring the resource allocation table is obtained by using an implicit resource allocation scheme, and when there are two or more CCEs on the received PDCCH.
  • FIG. 9 schematically illustrates an example of a method of allocating ACK / NACK resources according to the present invention when a PDCCH includes two or more CCEs and a PCC and an SCC transmit information of one transmission block in a multi-component carrier system. It is a flowchart shown.
  • the terminal receives the PDCCH and PDSCH from the base station (step S200).
  • the terminal may obtain resource allocation information on the PDSCH allocated to the terminal through the received PDCCH.
  • a resource index (n (1) PUCCH, 0 ) for ACK / NACK resource allocation on the PUCCH may be obtained through an indicator of the first CCE among the CCEs on the PDCCH received through the PCC (step S210, see FIG. 9).
  • additional resource indexes may be obtained in the same manner, that is, by implicit resource allocation, or by explicit resource allocation from the base station. You can get it.
  • the index of the CCE is selected by selecting one of the CCEs other than the first CCE among the CCEs on the received PDCCH. From the second resource index (n (1) PUCCH, 1 ) can be obtained.
  • a resource index is indicated through separate signaling (for example, an RRC message) from the base station. I can receive it.
  • separate signaling such as an RRC message
  • one resource index may be fixedly used.
  • the resource index may be indicated through the control channel of the SCC.
  • the resource index transmitted through the control channel of the SCC is allocated by an explicit resource allocation method.
  • the ACK / NACK resource is implicitly allocated to the first antenna according to a resource allocation table, for example, a channel selection table (step S220).
  • a resource allocation table for example, a channel selection table (step S220).
  • implicitly allocating an ACK / NACK resource according to a resource allocation table means that at least one of the resource indexes constituting the resource allocation table is obtained according to an implicit resource allocation method, and ACK / NACK according to the configured resource allocation table. This means that resources are allocated.
  • the resource indexes constituting the resource allocation table may be obtained by the explicit resource allocation method except for the resource index obtained by the implicit resource allocation method.
  • Resource indexes obtained through the received PDCCH indicate a resource value of the ACK / NACK signal on the resource allocation table.
  • the resource allocation table as shown in the channel selection table of Table 7, ACK / NACK information to be transmitted is mapped to ACK / NACK resources and symbols in the channel selection table (resource allocation table) according to the type.
  • the first antenna receives an allocated resource on the channel selection table (resource allocation table) and transmits an ACK / NACK signal.
  • Explicit resource allocation may be performed for the second antenna (step S230).
  • one resource index may be indicated by separate signaling (for example, an RRC message) from the base station.
  • separate signaling for example, an RRC message
  • one resource index may be fixedly used.
  • the resource index may be indicated through the control channel of the SCC.
  • the resource index transmitted through the control channel of the SCC is allocated by an explicit resource allocation method.
  • Table 10 shows a simple example of an ARI in an explicit resource allocation method using an ACK (ACK / NACK Resource Indicator), an RRC (Radio Resource Control) message, etc., in which 2 bits are used for ACK / NACK signal transmission.
  • the ACK / NACK resource allocated to the second antenna is allocated in a resource region different from that of the ACK / NACK resource allocated to the first antenna.
  • a resource region mapped from a resource allocation table and a resource region that is not in the resource allocation table may be distinguished and designated in advance as necessary.
  • resources are allocated to the second antenna in an explicit resource allocation scheme.
  • the present invention is not limited thereto, and resources may be allocated to the second antenna in an implicit resource allocation scheme.
  • any one of the CCEs other than the CCEs used for resource allocation of the first antenna that is, the CCEs used to construct a resource allocation table.
  • the resource index n (1) PUCCH can be obtained from the index of.
  • a Primary Component Carrier (PCC) received by the UE includes a PDCCH for a Secondary Component Carrier (SCC). Can be.
  • PCC Primary Component Carrier
  • SCC Secondary Component Carrier
  • ACK / NACK resources are allocated to the first antenna using a resource allocation table, and ACK / NACK resources are allocated to the second antenna in an explicit or implicit resource allocation scheme.
  • One resource index may be obtained from the index of the CCE on the received PDCCH as described above.
  • Additional resource indexes may be obtained in the same manner, i. E. By implicit resource allocation or by explicit resource allocation from the base station.
  • FIG. 10A schematically illustrates a concept of reserving and using a CCE immediately after a received CCE to obtain a second index for configuring a resource allocation table.
  • the index of the received CCE is odd or even. This may affect PDCCH resources allocated to other terminals. Therefore, when reserving any one of the CCEs before and after the CCEs on the received PDCCH, a method of minimizing the influence on the PDCCH resources to be allocated to other terminals may be considered in consideration of the CCE index on the received PDCCH.
  • the next CCE is reserved to obtain a second resource index constituting the resource allocation table.
  • the impact on PDCCH resources to be allocated to other UEs is not significant.
  • the second resource index constituting the resource allocation table is obtained by reserving the CCE immediately before the received CCE and not the next CCE after the received CCE.
  • more resources are available in L2.
  • the UE when the index of the CCE received by the UE on the PDCCH is an odd number, the UE immediately reserves the next CCE of the received CCE without reserving the CCE immediately before the received CCE. Even when obtaining the second resource index constituting the resource allocation table, it is possible to minimize the reduction of available resources of L2.
  • the second resource index for configuring the resource allocation table may not be allocated by an implicit resource allocation method, but may be allocated by an explicit resource allocation method.
  • the resource index may be transmitted through separate signaling (for example, an RRC message) from the base station.
  • ACK / NACK resources for the second antenna may be allocated in an implicit or explicit resource allocation scheme. Also in this case, if necessary, the resource regions mapped in the resource allocation table and the resource regions that are not can be distinguished and designated in advance.
  • one of the CCEs before and after the CCE is reserved for the CCE on the PDCCH received by the UE, and the resource index for the second antenna is derived from the index of this CCE. You can get it.
  • the resource among the before and after CCEs for the CCEs on the received PDCCH when the second resource index constituting the resource allocation table is obtained by the implicit resource allocation method, the resource among the before and after CCEs for the CCEs on the received PDCCH.
  • a resource index allocated to the second antenna may be obtained using a CCE other than the CCE used to construct the allocation table.
  • one resource index may be instructed through separate signaling (for example, an RRC message) from the base station.
  • separate signaling such as an RRC message
  • one resource index may be fixedly used.
  • the resource index may be indicated through the control channel of the SCC.
  • the resource index transmitted through the control channel of the SCC is allocated by an explicit resource allocation method.
  • a Primary Component Carrier (PCC) received by the UE includes a PDCCH for a Secondary Component Carrier (SCC). Can be.
  • PCC Primary Component Carrier
  • SCC Secondary Component Carrier
  • a resource allocation table for allocating ACK / NACK resources for the first antenna may be configured through two resource indexes allocated in an explicit resource allocation scheme. As described above, in this case, two resource indexes are allocated through separate signaling (eg, RRC message) from the base station.
  • the indications transmitted through the Secondary Component Carrier are generally explicit indications
  • the case in which ACK / NACK resources are allocated by an explicit indication on the PDCCH transmitted to the SCC may be considered.
  • the UE may configure the resource allocation table with the resource index indicated by the ARI on the PRCCH or the RRC message transmitted to the SCC.
  • the resource index constituting the resource allocation table may be composed of only resource indexes allocated through separate signaling (for example, RRC message) from the base station, or only resource indexes explicitly allocated through SSC. Or a combination thereof.
  • ACK / NACK resources may be allocated to the second antenna in an implicit or explicit resource allocation scheme as described above.
  • the region of the resource allocated by the resource allocation table and other regions may be designated and distinguished in advance.
  • a Primary Component Carrier (PCC) received by the UE includes a PDCCH for a Secondary Component Carrier (SCC). Can be.
  • PCC Primary Component Carrier
  • SCC Secondary Component Carrier
  • M is 3, i.e., the number of bits required to transmit the ACK / NACK signal is 3, the transmission mode in which three PDSCHs each transmit information of one transmission block or two PSDCHs are each one transmission block
  • M the number of bits required to transmit the ACK / NACK signal is 3
  • one PCC delivers information of one transport block and two SCCs transmit information of one transport block, or one PCC delivers information of one transport block.
  • one SCC transfers information of two transmission blocks or one PCC transfers information of two transmission blocks and one SCC transfers information of one transmission block.
  • the allocation of resources for the first antenna for transmitting the ACK / NACK signal is performed by using a resource allocation table.
  • M 3 resource indexes (n (1) PUCCH ) are needed to construct a resource allocation table.
  • a description will be given of dividing at least one of three resource indexes into an implicit resource allocation method and a case of obtaining all three resource indexes into an explicit resource allocation method.
  • the present embodiment may be applied to other cases in which there are three or more CCEs on the received PDCCH.
  • ACK / NACK resources are allocated to the first antenna and the second antenna in the order as shown in FIG. 9.
  • the terminal receives the PDCCH and PDSCH from the base station (step S200).
  • the terminal may obtain resource allocation information on the PDSCH allocated to the terminal through the received PDCCH.
  • a resource index (n (1) PUCCH, 0 ) for ACK / NACK resource allocation on the PUCCH may be obtained through an indicator of the first CCE among the CCEs on the received PDCCH (step S210).
  • additional resource indexes may be obtained in the same manner, that is, by implicit resource allocation, or by explicit resource allocation from the base station. You can also pay.
  • the second and third resource indexes required for configuring the resource allocation table are obtained by implicit resource allocation method, for example, two CCEs other than the first CCE among the CCEs on the received PDCCH are selected and the corresponding CCEs are selected.
  • a second and third resource index (n (1) PUCCH, 1 ) can be obtained from the index of.
  • one resource index is provided through separate signaling (for example, an RRC message) from the base station. Can be instructed. When separate signaling such as an RRC message is used, one resource index may be fixedly used.
  • the resource index may be indicated through the control channel of the SCC.
  • the resource index transmitted through the control channel of the SCC is allocated by an explicit resource allocation method.
  • one of the second and third resource indexes required to configure the resource allocation table one resource index may be obtained by an implicit resource allocation method, the remaining resource indexes by an explicit resource allocation method.
  • the ACK / NACK resource is implicitly allocated to the first antenna according to a resource allocation table, for example, a channel selection table (step S220).
  • implicitly allocating an ACK / NACK resource according to a resource allocation table means that at least one of the resource indexes constituting the resource allocation table is obtained according to an implicit resource allocation method, and ACK / NACK according to the configured resource allocation table. This means that resources are allocated.
  • Resource indexes obtained through the received PDCCH indicate a resource value of the ACK / NACK signal on the resource allocation table.
  • ACK / NACK information to be transmitted is mapped to ACK / NACK resources and symbols of the channel selection table according to the type.
  • the first antenna receives an allocated resource on the channel selection table and transmits an ACK / NACK signal.
  • Explicit resource allocation may be performed for the second antenna (step S230).
  • the UE may be allocated a resource index of the PUCCH directly from the base station through a signaling signal or a separate channel, or may be allocated a resource index through the SCC.
  • an ARI, an RRC message, or the like may be used as the explicit resource allocation scheme.
  • the ACK / NACK resource allocated to the second antenna is allocated in a resource region different from that of the ACK / NACK resource allocated to the first antenna.
  • resource regions mapped from resource allocation tables and resource regions not mapped may be pre-designated.
  • the resource index n (1) PUCCH can be obtained from the index of.
  • a Primary Component Carrier (PCC) received by the UE includes a PDCCH for a Secondary Component Carrier (SCC). Can be.
  • PCC Primary Component Carrier
  • SCC Secondary Component Carrier
  • An embodiment of the present invention will be described with respect to a case in which a PDCCH received by the UE is configured with two or less CCEs, when M value is 3 and at least one of the resource indices required for configuring the resource allocation table is obtained through an implicit resource allocation scheme. .
  • ACK / NACK resources are allocated to the first antenna using a resource allocation table, and ACK / NACK resources are allocated to the second antenna in an explicit or implicit resource allocation scheme.
  • three resource indexes are required to construct a resource allocation table. Even if there are two or less CCEs on the received PDCCH, three required resource indexes may be allocated in an implicit resource allocation scheme.
  • the third resource index for configuring a resource allocation table can be obtained from any one of the CCE indexes.
  • a resource index necessary for reserving the CCE before and after the CCE on the received PDCCH and configuring a resource allocation table from the indexes of the CCEs is obtained.
  • one resource index may be allocated by an implicit resource allocation method using only one CCE among the CCEs before and after the CCE on the received PDCCH, and the other resource index may be allocated by an explicit resource allocation method.
  • necessary resource indexes other than the resource indexes not allocated by the implicit resource allocation method may be allocated by the explicit resource allocation method. For example, if only the first resource index is allocated by implicit resource allocation, the remaining two resource indexes are allocated by implicit resource allocation. When the first and second resource indexes are allocated by implicit resource allocation, one remaining resource index is used by explicit resource allocation. Can be assigned.
  • the resource index may be transmitted through separate signaling (for example, an RRC message) from the base station.
  • ACK / NACK resources for the second antenna may be allocated in an implicit or explicit resource allocation scheme. Also in this case, if necessary, the resource regions mapped in the resource allocation table and the resource regions that are not can be distinguished and designated in advance.
  • the UE When allocating resources in an implicit resource allocation scheme to the second antenna, when all the CCEs on the received PDCCH are used to construct a resource allocation table for allocating ACK / NACK resources to the first antenna, the UE receives the PDCCH on the received PDCCH.
  • a CCE one of the CCEs before and after the CCE can be reserved and the resource index for the second antenna can be obtained from the index of this CCE.
  • the second antenna is allocated to the second antenna using a CCE other than the CCE used to construct a resource allocation table among the front and rear CCEs of the CCEs on the received PDCCH. Get the resource index.
  • the CCEs other than the CCEs before and after the CCEs on the received PDCCH are used. Can be reserved and used, or a resource index can be allocated and used by explicit resource allocation method.
  • one resource index may be indicated by separate signaling (for example, an RRC message) from the base station.
  • separate signaling such as an RRC message
  • one resource index may be fixedly used.
  • the resource index may be indicated through the control channel of the SCC.
  • the resource index transmitted through the control channel of the SCC is allocated by an explicit resource allocation method.
  • the embodiments of the present invention described above are applicable to the case of the aforementioned intercarrier scheduling, that is, a case where a Primary Component Carrier (PCC) received by the UE includes a PDCCH for a Secondary Component Carrier (SCC). Can be.
  • PCC Primary Component Carrier
  • SCC Secondary Component Carrier
  • a resource allocation table for allocating ACK / NACK resources for the first antenna may be configured through three resource indexes allocated in an explicit resource allocation scheme. As described above, in this case, three resource indexes are allocated through separate signaling (eg, RRC message) from the upper layer.
  • the indications transmitted through the secondary component carrier are generally explicit indications
  • the case where ACK / NACK resources are allocated by an explicit indication on the PDCCH transmitted to the SCC may be considered.
  • the UE may configure the resource allocation table by including resource indexes indicated by the RRC message or ARI on the PDCCH transmitted to the SCC or the SSC.
  • ACK / NACK resources may be allocated to the second antenna in an implicit or explicit resource allocation scheme as described above.
  • the region of the resource allocated by the resource allocation table and other regions may be designated and distinguished in advance.
  • a Primary Component Carrier (PCC) received by the UE includes a PDCCH for a Secondary Component Carrier (SCC). Can be.
  • PCC Primary Component Carrier
  • SCC Secondary Component Carrier
  • one PDSCH delivers information of two transmission blocks.
  • two PDSCHs each transmit information of two transmission blocks.
  • one PCC delivers information of two transport blocks and one When the SCC delivers information of two transmission blocks, a case may be considered in which one PCC delivers information of two transmission blocks and two SCCs transmit information of one transmission block.
  • the allocation of resources for the first antenna for transmitting the ACK / NACK signal is performed by using a resource allocation table.
  • M 4
  • four resource indexes (n (1) PUCCH ) are needed to construct a resource allocation table.
  • a description will be made of a case in which at least one or more of four resource indexes are obtained by using an implicit resource allocation method and a case where all four resource indexes are obtained by an explicit resource allocation method.
  • the present embodiment may be equally applied to other cases in which there are four or more CCEs on the received PDCCH.
  • ACK / NACK resources are allocated to the first antenna and the second antenna in the order as shown in FIG. 9.
  • the terminal receives the PDCCH and PDSCH from the base station (step S200).
  • the terminal may obtain resource allocation information on the PDSCH allocated to the terminal through the received PDCCH.
  • a resource index (n (1) PUCCH, 0 ) for ACK / NACK resource allocation on the PUCCH may be obtained through an indicator of the first CCE among the CCEs on the received PDCCH (step S210).
  • additional resource indexes may be obtained in the same manner, that is, by implicit resource allocation, or by explicit resource allocation from the base station. You can also pay.
  • the second to fourth resource indexes required for configuring the resource allocation table are obtained by implicit resource allocation, for example, three CCEs among the remaining CCEs except the first CCE on the received PDCCH are selected and the corresponding CCEs are selected.
  • the second to third resource index n (1) PUCCH, 1 may be obtained from the index of.
  • one resource index is indicated through separate signaling (for example, an RRC message) from the base station. I can receive it.
  • separate signaling such as an RRC message
  • one resource index may be fixedly used.
  • the resource index may be indicated through the control channel of the SCC. At this time, the resource index transmitted through the control channel of the SCC is allocated by an explicit resource allocation method.
  • some of the second to fourth resource indexes necessary for configuring the resource allocation table may be obtained by implicit resource allocation and the remaining resource indexes by explicit resource allocation.
  • the ACK / NACK resource is implicitly allocated to the first antenna according to a resource allocation table, for example, a channel selection table (step S220).
  • a resource allocation table for example, a channel selection table (step S220).
  • implicitly allocating an ACK / NACK resource according to a resource allocation table means that at least one of the resource indexes constituting the resource allocation table is obtained according to an implicit resource allocation method. This means that resources are allocated.
  • Resource indexes obtained through the received PDCCH indicate a resource value of the ACK / NACK signal on the resource allocation table.
  • the resource allocation table as shown in the channel selection table of Table 9, ACK / NACK information to be transmitted is mapped to ACK / NACK resources and symbols in the channel selection table (resource allocation table) according to the type.
  • the first antenna receives an allocated resource on the channel selection table (resource allocation table) and transmits an ACK / NACK signal.
  • Explicit resource allocation may be performed for the second antenna (step S230).
  • one resource index may be indicated by separate signaling (eg, an RRC message) from the base station.
  • RRC message e.g., an RRC message
  • one resource index may be fixedly used.
  • the resource index may be indicated through the control channel of the SCC.
  • the resource index transmitted through the control channel of the SCC is allocated by an explicit resource allocation method.
  • an ARI an RRC message, or the like may be used.
  • the ACK / NACK resource allocated to the second antenna is allocated in a resource region different from that of the ACK / NACK resource allocated to the first antenna.
  • resource regions mapped from resource allocation tables and resource regions not mapped may be pre-designated.
  • the resource index n (1) PUCCH can be obtained from the index of.
  • a Primary Component Carrier (PCC) received by the UE includes a PDCCH for a Secondary Component Carrier (SCC). Can be.
  • PCC Primary Component Carrier
  • SCC Secondary Component Carrier
  • An embodiment of the present invention will be described with respect to a case in which a PDCCH received by the UE is configured with three or less CCEs, when the M value is 4 and at least one of the resource indices required for configuring the resource allocation table is obtained in an implicit resource allocation scheme. .
  • ACK / NACK resources are allocated to the first antenna using a resource allocation table, and ACK / NACK resources are allocated to the second antenna in an explicit or implicit resource allocation scheme.
  • One of the post-war CCEs can be reserved and a fourth resource index for constructing a resource allocation table can be obtained from the index of this CCE.
  • necessary resource indexes other than the resource indexes allocated by the implicit resource allocation method may be allocated by the explicit resource allocation method.
  • ACK / NACK resources for the second antenna may be allocated in an implicit or explicit resource allocation scheme. Also in this case, if necessary, the resource regions mapped in the resource allocation table and the resource regions that are not can be distinguished and designated in advance.
  • the UE When allocating resources in an implicit resource allocation scheme to the second antenna, when all the CCEs on the received PDCCH are used to construct a resource allocation table for allocating ACK / NACK resources to the first antenna, the UE receives the PDCCH on the received PDCCH.
  • a CCE one of the CCEs before and after the CCE can be reserved and the resource index for the second antenna can be obtained from the index of this CCE.
  • the second antenna is allocated to the second antenna using a CCE other than the CCE used to construct a resource allocation table among the front and rear CCEs of the CCEs on the received PDCCH. Get the resource index.
  • the CCEs other than the CCEs before and after the CCEs on the received PDCCH are used. Can be reserved and used, or a resource index can be allocated and used by explicit resource allocation method.
  • one resource index may be indicated by separate signaling (eg, an RRC message) from the base station.
  • RRC message e.g, an RRC message
  • one resource index may be fixedly used.
  • the resource index may be indicated through the control channel of the SCC. At this time, the resource index transmitted through the control channel of the SCC is allocated by an explicit resource allocation method.
  • the embodiments of the present invention described above are applicable to the case of the aforementioned intercarrier scheduling, that is, a case where a Primary Component Carrier (PCC) received by the UE includes a PDCCH for a Secondary Component Carrier (SCC).
  • PCC Primary Component Carrier
  • SCC Secondary Component Carrier
  • Can be. 11 is a conceptual diagram schematically illustrating that two resource indexes are allocated in an implicit resource allocation scheme from two CCEs on a PDCCH of a PCC when intercarrier scheduling is performed.
  • the resource allocation table may be configured to include at least one of the two resource indexes, and the resource index necessary for allocating the ACK / NACK resource to the first and second antennas is an explicit resource allocation scheme as described above. Or the like.
  • a resource allocation table for allocating ACK / NACK resources for the first antenna may be configured through four resource indexes allocated in an explicit resource allocation scheme. As described above, in this case four resource indexes are allocated through separate signaling (eg, RRC message) from the base station.
  • the indications transmitted through the Secondary Component Carrier are generally explicit indications
  • the case in which ACK / NACK resources are allocated by an explicit indication on the PDCCH transmitted to the SCC may be considered.
  • the UE may configure the resource allocation table by including resource indexes indicated by the RRC message or ARI on the PDCCH transmitted to the SCC or the SSC.
  • ACK / NACK resources may be allocated to the second antenna in an implicit or explicit resource allocation scheme as described above.
  • the region of the resource allocated by the resource allocation table and other regions may be designated and distinguished in advance.
  • a Primary Component Carrier (PCC) received by the UE includes a PDCCH for a Secondary Component Carrier (SCC). Can be.
  • PCC Primary Component Carrier
  • SCC Secondary Component Carrier
  • FIG. 12 is a block diagram schematically illustrating a wireless communication system in which an embodiment of the present invention is implemented.
  • the base station 50 includes a processor 51 (signal processing unit), a memory 52 and a radio frequency unit (RF) 53.
  • a processor 51 signal processing unit
  • a memory 52 for storing data
  • RF radio frequency unit
  • the processor 51 implements the proposed functions, processes and / or methods.
  • the processor 51 may configure a downlink physical channel and perform HARQ.
  • the processor 15 includes a resource index constituting a resource allocation table for resource allocation of the ACK / NACK signal in the downlink transport block or processes a transmission signal that explicitly indicates this resource index.
  • the processing of the signal is a broad processing including signal generation, modulation, signal content assignment, signal transmission determination, and the like. For example, how many resource indexes are allocated by an explicit resource allocation method and how many resource indexes are allocated by an implicit resource allocation method among resource indexes constituting a resource allocation table for ACK / NACK resource allocation. Which resource should be based on the resource index in order to be allocated may be determined by the processor 51 and transmitted to the terminal 60.
  • the memory 52 is connected to the processor 51 and stores a protocol or parameter for HARQ operation.
  • the memory 52 also stores a resource allocation table for ACK / NACK resource allocation.
  • the format of the resource allocation table is predetermined by an upper layer so that a resource allocation table of the same format exists in the terminal and the base station.
  • the base station 50 may use the resource allocation table stored in the memory 52 to process the ACK / NACK signal transmitted from the terminal 60.
  • the RF unit 53 is connected to the processor 51 and transmits and / or receives a radio signal and includes a plurality of antennas.
  • the terminal 60 includes a processor 61 (signal processing unit), a memory 62 and an RF unit 63.
  • the processor 61 implements the proposed functions, processes and / or methods.
  • the processor 61 may acquire a plurality of resources and transmit a HARQ ACK / NACK signal through the multiple antennas using the plurality of resources.
  • a transmission resource may be allocated according to an implicit or explicit resource allocation scheme through a radio signal received from a base station.
  • the memory 62 is connected to the processor 61 and stores a protocol or parameter for HARQ operation and the same resource allocation table as the base station 50 holds for ACK / NACK resource allocation.
  • the RF unit 63 is connected to the processor 61 and transmits and / or receives a radio signal and includes a plurality of antennas.
  • Processors 51 and 61 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices.
  • the memories 52 and 62 may include read-only memory (ROM), random access memory (RAM), flash memory, memory cards, storage media and / or other storage devices.
  • the RF unit 53 and 63 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 is stored in the memory 52, 62 and can be executed by the processor 51, 61.
  • the memories 52 and 62 may be inside or outside the processors 51 and 61, and may be connected to the processors 51 and 61 by various well-known means.

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  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé d'émission d'un signal ACK/NACK de demande de répétition automatique hybride (HARQ) dans un système de communication sans fil. Le procédé comprend les étapes suivantes consistant à : recevoir un bloc d'émission sur la liaison descendante par l'intermédiaire d'une affectation sur la liaison descendante indiquée par un canal de commande sur la liaison descendante; déterminer des premier et second index de ressources ACK/NACK sur la base d'au moins une des ressources utilisées pendant l'émission du canal de commande sur la liaison descendante; et émettre un signal ACK/NACK destiné au bloc d'émission sur la liaison descendante par l'intermédiaire d'une pluralité d'antennes en utilisant des première et seconde ressources ACK/NACK respectivement obtenues à partir des premier et second index de ressources ACK/NACK. Le premier index de ressource ACK/NACK est affecté sur la base d'un tableau d'affectation de ressource se composant d'une pluralité d'index de ressources correspondant aux bits d'émission du signal ACK/NACK, ce qui empêche une collision de ressources d'émission parmi différentes antennes et permet d'obtenir une diversité d'émission au moyen d'un système à antennes multiples.
PCT/KR2011/006925 2010-09-20 2011-09-20 Procédé d'affectation d'une ressource pucch pour l'émission d'un signal ack/nack, et appareil d'émission l'utilisant WO2012039570A2 (fr)

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EP2438789A4 (fr) * 2010-06-18 2013-06-12 Mediatek Inc Attribution de ressources d'un canal de rétroaction harq pour agrégation de porteuses dans des systèmes ofdma
US8660107B2 (en) 2010-06-18 2014-02-25 Mediatek Inc. Uplink HARQ feedback channel design for carrier aggregation in OFDMA systems
US8737299B2 (en) 2010-06-18 2014-05-27 Mediatek Inc. Resource allocation of uplink HARQ feedback channel for carrier aggregation in OFDMA systems
EP2438789A1 (fr) * 2010-06-18 2012-04-11 MediaTek Inc. Attribution de ressources d'un canal de rétroaction harq pour agrégation de porteuses dans des systèmes ofdma
US10237855B2 (en) 2012-05-30 2019-03-19 Intel Corporation PUCCH resource allocation with enhanced PDCCH
US10972231B2 (en) 2012-08-02 2021-04-06 Sun Patent Trust Wireless communication terminal, base station device, resource allocation method
US11881951B2 (en) 2012-08-02 2024-01-23 Sun Patent Trust Integrated circuit
US11569946B2 (en) 2012-08-02 2023-01-31 Sun Patent Trust Integrated circuit
WO2018098675A1 (fr) * 2016-11-30 2018-06-07 富士通株式会社 Dispositif et procédé de retransmission de données et système de communication
US11038655B2 (en) 2017-03-08 2021-06-15 Lg Electronics Inc. Method and apparatus for transmitting and receiving radio signals in a wireless communication system
US11621821B2 (en) 2017-03-08 2023-04-04 Lg Electronics Inc. Method and apparatus for transmitting and receiving radio signals in a wireless communication system
RU2735328C1 (ru) * 2017-03-08 2020-10-30 ЭлДжи ЭЛЕКТРОНИКС ИНК. Способ и устройство для передачи и приема радиосигнала в системе беспроводной связи
US11012223B2 (en) 2017-03-08 2021-05-18 Lg Electronics Inc. Method and apparatus for transmitting and receiving radio signals in a wireless communication system
US11012221B2 (en) 2017-03-08 2021-05-18 Lg Electronics Inc. Method and apparatus for transmitting and receiving radio signals in a wireless communication system
US12058076B2 (en) 2017-03-08 2024-08-06 Lg Electronics Inc. Method and apparatus for transmitting and receiving radio signals in a wireless communication system
US11271702B2 (en) 2017-03-08 2022-03-08 Lg Electronics Inc. Method and apparatus for transmitting and receiving radio signals in a wireless communication system
US11968147B2 (en) 2017-03-08 2024-04-23 Lg Electronics Inc. Method and apparatus for transmitting and receiving radio signals in a wireless communication system
US11956174B2 (en) 2017-03-08 2024-04-09 Lg Electronics Inc. Method and apparatus for transmitting and receiving radio signals in a wireless communication system
US11956173B2 (en) 2017-03-08 2024-04-09 Lg Electronics Inc. Method and Apparatus for transmitting and receiving radio signals in a wireless communication system
CN111434166B (zh) * 2017-11-29 2024-03-19 株式会社Ntt都科摩 终端、无线通信方法、基站以及系统
CN111434166A (zh) * 2017-11-29 2020-07-17 株式会社Ntt都科摩 用户终端以及无线通信方法
CN111567116B (zh) * 2018-01-12 2024-04-02 高通股份有限公司 上行链路控制信道资源分配
CN111567116A (zh) * 2018-01-12 2020-08-21 高通股份有限公司 上行链路控制信道资源分配
WO2019182349A1 (fr) * 2018-03-20 2019-09-26 엘지전자 주식회사 Procédé d'émission et de réception d'un signal harq-ack et dispositif associé
US11438106B2 (en) 2018-03-20 2022-09-06 Lg Electronics Inc. Method for transmitting and receiving HARQ-ACK signal and device therefor
US11805525B2 (en) 2019-05-02 2023-10-31 Samsung Electronics Co., Ltd. Method and apparatus for determining of transmission resources for uplink channels of use for dual connectivity in wireless communication system
WO2020222562A1 (fr) * 2019-05-02 2020-11-05 Samsung Electronics Co., Ltd. Procédé et appareil permettant de déterminer des ressources de transmission de canaux de liaison montante utilisées dans une double connectivité d'un système de communication sans fil
US11290991B2 (en) 2019-05-02 2022-03-29 Samsung Electronics Co., Ltd. Method and apparatus for determining of transmission resources for uplink channels of use for dual connectivity in wireless communication system

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