WO2012148060A1 - Procédé et appareil permettant de transmettre des informations de commande de liaison montante dans un système de communication sans fil - Google Patents

Procédé et appareil permettant de transmettre des informations de commande de liaison montante dans un système de communication sans fil Download PDF

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Publication number
WO2012148060A1
WO2012148060A1 PCT/KR2011/009061 KR2011009061W WO2012148060A1 WO 2012148060 A1 WO2012148060 A1 WO 2012148060A1 KR 2011009061 W KR2011009061 W KR 2011009061W WO 2012148060 A1 WO2012148060 A1 WO 2012148060A1
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Prior art keywords
pucch
resource
base station
pucch format
uplink control
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PCT/KR2011/009061
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English (en)
Korean (ko)
Inventor
김기태
천진영
김수남
강지원
임빈철
박성호
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엘지전자 주식회사
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Priority to KR1020137023350A priority Critical patent/KR101487122B1/ko
Publication of WO2012148060A1 publication Critical patent/WO2012148060A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • 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
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • 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

Definitions

  • the present invention relates to wireless communication, and more particularly, to a method and apparatus for transmitting uplink control information in a wireless communication system.
  • the next generation multimedia wireless communication system which is being actively researched recently, requires a system capable of processing and transmitting various information such as video, wireless data, etc., out of an initial voice-oriented service.
  • the fourth generation of wireless communication which is currently being developed after the third generation of wireless communication systems, aims to support high-speed data services of downlink 1 Gbps (Gigabits per second) and uplink 500 Mbps (Megabits per second).
  • the purpose of a wireless communication system is to enable a large number of users to communicate reliably regardless of location and mobility.
  • a wireless channel is a path loss, noise, fading due to multipath, inter-symbol interference (ISI), or mobility of UE.
  • ISI inter-symbol interference
  • There are non-ideal characteristics such as the Doppler effect.
  • Various techniques have been developed to overcome the non-ideal characteristics of the wireless channel and to improve the reliability of the wireless communication.
  • each node in a wireless communication system in which each node cooperates with each other, each node is independent of a base station (BS), an advanced BS (ABS), a Node-B (NB), an eNode-B (eNB), and an access point (AP). It has much better performance than wireless communication systems operating on the back. This can be called a multi-node system.
  • BS base station
  • ABS advanced BS
  • NB Node-B
  • eNB eNode-B
  • AP access point
  • New control channels need to be established for efficient operation of multi-node systems.
  • An object of the present invention is to provide a method and apparatus for transmitting uplink control information in a wireless communication system.
  • the present invention provides a method for solving the problem of physical uplink control channel (PUCCH) resource allocation for a multi-node system. More specifically, the present invention, in allocating PUCCH resources for a multi-node system, PUCCH using a mixed region where the PUCCH formats 1 / 1a / 1b and 2 / 2a / 2b are mixed and multiplexed or by using a predetermined region Provides a way to allocate resources.
  • PUCCH physical uplink control channel
  • a method for transmitting uplink control information in a multi-node system is provided.
  • downlink data is transmitted from a base station through a physical downlink shared channel (PDSCH) scheduled based on a physical downlink control channel (E-PDCCH), which is a control channel for a plurality of terminals in the multi-node system.
  • E-PDCCH physical downlink control channel
  • PUCCH physical uplink control channel
  • the PUCCH resource may be allocated to a mixed region in which PUCCH formats 1 / 1a / 1b and PUCCH formats 2 / 2a / 2b are multiplexed.
  • the mixed region may include one resource block (RB) in each slot.
  • RB resource block
  • the number of cyclic shifts used for the PUCCH format 1 / 1a / 1b or the number of cyclic shifts used for the PUCCH format 2 / 2a / 2b in the mixed region is determined.
  • the method may further include receiving from a base station.
  • the number of cyclic shifts used in the PUCCH format 1 / 1a / 1b or the number of cyclic shifts used in the PUCCH format 2 / 2a / 2b may be received through a higher layer.
  • n CCE is an index of the first control channel element ( CCE) to which the E-PDCCH is allocated.
  • N PUCCH (1) c ⁇ N sc RB / ⁇ shift PUCCH .
  • N c is 3 for normal cyclic prefix (CP) and 2 for extended CP.
  • N sc RB is 12, which is the number of subcarriers included in one resource block.
  • N CS, RRH (1) is the number of cyclic shifts used in the PUCCH format 1 / 1a / 1b
  • N CS, RRH (2) is the number of cyclic shifts used in the PUCCH format 2 / 2a / 2b.
  • N RB (2) represents the number of resource blocks that can be used for PUCCH format 2 / 2a / 2b transmission in each slot.
  • the resource index n PUCCH 2 for the PUCCH format 2 / 2a / 2b in the mixed region may be determined by the base station.
  • the PUCCH resource may be previously designated by the base station.
  • the predetermined PUCCH resource may include at least one resource block.
  • the PUCCH format 1 / 1a / resource index for 1b n PUCCH (1) and the PUCCH formats 2 / 2a / 2b scope of the resource index n PUCCH (2) for can be pre-specified by the base station .
  • a terminal in a multi-node system.
  • the terminal includes a radio frequency (RF) unit for transmitting or receiving a radio signal, and a processor connected to the RF unit, wherein the processor is an E-PDCCH (Physical) which is a control channel for a plurality of terminals in the multi-node system.
  • RF radio frequency
  • E-PDCCH Physical
  • PDSCH physical downlink shared channel
  • PUCCH physical uplink control channel
  • the proposed PUCCH can be used to efficiently operate a multi-node system.
  • 1 is a wireless communication system.
  • FIG. 2 shows a structure of a radio frame in 3GPP LTE.
  • FIG 3 shows an example of a resource grid for one downlink slot.
  • 5 shows a structure of an uplink subframe.
  • FIG. 6 shows an index of a PDCCH allocated to each UE and a first CCE to which each PDDCH is allocated.
  • FIG. 7 shows an example in which a PUCCH format is mapped to a physical resource.
  • FIG. 8 illustrates an example of a relationship between a logical PUCCH resource index and a physical resource block index m.
  • FIG 9 shows an example of a multi-node system.
  • FIG. 10 illustrates a case in which an E-PDCCH search space is added after an existing PDCCH search space.
  • 11 shows an example of PUCCH resource allocation for a terminal.
  • FIG. 13 shows an embodiment of a proposed method for transmitting uplink control information.
  • FIG. 14 is a block diagram of a wireless communication system in which an embodiment of the present invention is implemented.
  • CDMA code division multiple access
  • FDMA frequency division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • CDMA may be implemented with a radio technology such as Universal Terrestrial Radio Access (UTRA) or CDMA2000.
  • TDMA may be implemented with wireless technologies such as Global System for Mobile communications (GSM) / General Packet Radio Service (GPRS) / Enhanced Data Rates for GSM Evolution (EDGE).
  • GSM Global System for Mobile communications
  • GPRS General Packet Radio Service
  • EDGE Enhanced Data Rates for GSM Evolution
  • OFDMA may be implemented in a wireless technology such as IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802-20, Evolved UTRA (E-UTRA), or the like.
  • IEEE 802.16m is an evolution of IEEE 802.16e and provides backward compatibility with systems based on IEEE 802.16e.
  • UTRA is part of the Universal Mobile Telecommunications System (UMTS).
  • 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) is part of Evolved UMTS (E-UMTS) using Evolved-UMTS Terrestrial Radio Access (E-UTRA), which employs OFDMA in downlink and SC in uplink -FDMA is adopted.
  • LTE-A Advanced
  • 3GPP LTE Advanced
  • 1 is a wireless communication system.
  • the wireless communication system 10 includes at least one base station (BS) 11.
  • Each base station 11 provides a communication service for a particular geographic area (generally called a cell) 15a, 15b, 15c.
  • the cell can in turn be divided into a number of regions (called sectors).
  • the UE 12 may be fixed or mobile and may have a mobile station (MS), a mobile terminal (MS), a mobile terminal (MT), a user terminal (UT), a subscriber station (SS), a wireless device, or 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 fixed station communicating with the terminal 12, and may be called in other terms such as an evolved-NodeB (eNB), a base transceiver system (BTS), an access point, and the like. have.
  • eNB evolved-NodeB
  • BTS base transceiver system
  • access point and the like. have.
  • a terminal typically belongs to one cell, and a cell to which the terminal belongs is called a serving cell.
  • a base station that provides a communication service for a serving cell is called a serving BS. Since the wireless communication system is a cellular system, there are other cells adjacent to the serving cell. Another cell adjacent to the serving cell is called a neighbor cell.
  • a base station that provides communication service for a neighbor cell is called a neighbor BS. The serving cell and the neighbor cell are relatively determined based on the terminal.
  • downlink means communication from the base station 11 to the terminal 12
  • uplink means communication from the terminal 12 to the base station 11.
  • the transmitter may be part of the base station 11 and the receiver may be part of the terminal 12.
  • the transmitter may be part of the terminal 12 and the receiver may be part of the base station 11.
  • the wireless communication system may be any one of a multiple-input multiple-output (MIMO) system, a multiple-input single-output (MIS) system, a single-input single-output (SISO) system, and a single-input multiple-output (SIMO) system.
  • MIMO multiple-input multiple-output
  • MIS multiple-input single-output
  • SISO single-input single-output
  • SIMO single-input multiple-output
  • the MIMO system uses a plurality of transmit antennas and a plurality of receive antennas.
  • the MISO system uses multiple transmit antennas and one receive antenna.
  • the SISO system uses one transmit antenna and one receive antenna.
  • the SIMO system uses one transmit antenna and multiple receive antennas.
  • a transmit antenna means a physical or logical antenna used to transmit one signal or stream
  • a receive antenna means a physical or logical antenna used to receive one signal or stream.
  • FIG. 2 shows a structure of a radio frame in 3GPP LTE.
  • a radio frame consists of 10 subframes, and one subframe consists of two slots. Slots in a radio frame are numbered with slots # 0 through # 19. The time taken for one subframe to be transmitted is called a transmission time interval (TTI). TTI may be referred to as a scheduling unit for data transmission. For example, one radio frame may have a length of 10 ms, one subframe may have a length of 1 ms, and one slot may have a length of 0.5 ms.
  • One slot includes a plurality of orthogonal frequency division (ULTIplexing) symbols in the time domain and a plurality of subcarriers in the frequency domain.
  • the OFDM symbol is used to represent one symbol period since 3GPP LTE uses OFDMA in downlink, and may be called a different name according to a multiple access scheme.
  • SC-FDMA when SC-FDMA is used as an uplink multiple access scheme, it may be referred to as an SC-FDMA symbol.
  • a resource block (RB) includes a plurality of consecutive subcarriers in one slot in resource allocation units.
  • the structure of the radio frame is merely an example. Accordingly, the number of subframes included in the radio frame, the number of slots included in the subframe, or the number of OFDM symbols included in the slot may be variously changed.
  • 3GPP LTE defines that one slot includes 7 OFDM symbols in a normal cyclic prefix (CP), and one slot includes 6 OFDM symbols in an extended CP. .
  • CP normal cyclic prefix
  • Wireless communication systems can be largely divided into frequency division duplex (FDD) and time division duplex (TDD).
  • FDD frequency division duplex
  • TDD time division duplex
  • uplink transmission and downlink transmission are performed while occupying different frequency bands.
  • uplink transmission and downlink transmission are performed at different times while occupying the same frequency band.
  • the channel response of the TDD scheme is substantially reciprocal. This means that the downlink channel response and the uplink channel response are almost the same in a given frequency domain. Therefore, in a TDD based wireless communication system, the downlink channel response can be obtained from the uplink channel response.
  • the uplink transmission and the downlink transmission are time-divided in the entire frequency band, and thus the downlink transmission by the base station and the uplink transmission by the terminal cannot be simultaneously performed.
  • uplink transmission and downlink transmission are performed in different subframes.
  • FIG 3 shows an example of a resource grid for one downlink slot.
  • the downlink slot includes a plurality of OFDM symbols in the time domain and N RB resource blocks in the frequency domain.
  • the number N RB of resource blocks included in the downlink slot depends on the downlink transmission bandwidth set in the cell. For example, in the LTE system, N RB may be any one of 60 to 110.
  • One resource block includes a plurality of subcarriers in the frequency domain.
  • the structure of the uplink slot may also be the same as that of the downlink slot.
  • Each element on the resource grid is called a resource element.
  • an exemplary resource block includes 7 ⁇ 12 resource elements including 7 OFDM symbols in the time domain and 12 subcarriers in the frequency domain, but the number of OFDM symbols and the number of subcarriers in the resource block is equal to this. It is not limited. The number of OFDM symbols and the number of subcarriers can be variously changed according to the length of the CP, frequency spacing, and the like. For example, the number of OFDM symbols is 7 for a normal CP and the number of OFDM symbols is 6 for an extended CP. The number of subcarriers in one OFDM symbol may be selected and used among 128, 256, 512, 1024, 1536 and 2048.
  • the downlink subframe includes two slots in the time domain, and each slot includes seven OFDM symbols in the normal CP.
  • the leading up to 3 OFDM symbols (up to 4 OFDM symbols for 1.4Mhz bandwidth) of the first slot in the subframe are the control regions to which control channels are allocated and the remaining OFDM symbols are the physical downlink shared channel (PDSCH). Becomes the data area to be allocated.
  • PDSCH physical downlink shared channel
  • the PDCCH includes resource allocation and transmission format of downlink-shared channel (DL-SCH), resource allocation information of uplink shared channel (UL-SCH), paging information on PCH, system information on DL-SCH, and random access transmitted on PDSCH. Resource allocation of higher layer control messages such as responses, sets of transmit power control commands for individual UEs in any UE group, activation of voice over internet protocol (VoIP), and the like.
  • a plurality of PDCCHs may be transmitted in the control region, and the terminal may monitor the plurality of PDCCHs.
  • the PDCCH is transmitted on an aggregation of one or several consecutive control channel elements (CCEs).
  • CCEs control channel elements
  • CCE is a logical allocation unit used to provide a PDCCH with a coding rate according to a state of a radio channel.
  • the CCE corresponds to a plurality of resource element groups.
  • the format of the PDCCH and the number of bits of the PDCCH are determined according to the correlation between the number of CCEs and the coding rate provided by the CCEs.
  • the base station determines the PDCCH format according to the DCI to be sent to the terminal, and attaches a cyclic redundancy check (CRC) to the control information.
  • CRC cyclic redundancy check
  • RNTI a unique radio network temporary identifier
  • the PDCCH is for a specific terminal, a unique identifier of the terminal, for example, a cell-RNTI (C-RNTI) may be masked to the CRC.
  • C-RNTI cell-RNTI
  • a paging indication identifier for example, p-RNTI (P-RNTI) may be masked to the CRC.
  • SI-RNTI system information-RNTI
  • RA-RNTI random access-RNTI
  • 5 shows a structure of an uplink subframe.
  • the uplink subframe may be divided into a control region and a data region in the frequency domain.
  • the control region is allocated a physical uplink control channel (PUCCH) for transmitting uplink control information.
  • the data region is allocated a physical uplink shared channel (PUSCH) for transmitting data.
  • the terminal may support simultaneous transmission of the PUSCH and the PUCCH.
  • the PUSCH is mapped to the UL-SCH, which is a transport channel.
  • the uplink data transmitted on the PUSCH may be a transport block which is a data block for the UL-SCH transmitted during the TTI.
  • the transport block may be user information.
  • the uplink data may be multiplexed data.
  • the multiplexed data may be a multiplexed transport block and control information for the UL-SCH.
  • control information multiplexed with data may include a channel quality indicator (CQI), a precoding matrix indicator (PMI), a hybrid automatic repeat request (HARQ), a rank indicator (RI), and the like.
  • the uplink data may consist of control information only.
  • the uplink control information transmitted on the PUCCH includes a hybrid automatic repeat request (HARQ) acknowledgment (ACK) / non-acknowledgement (NACK), a channel quality indicator (CQI) indicating a downlink channel state, and an uplink radio resource allocation request. (scheduling request).
  • PUCCH supports various formats, and the type of uplink control information transmitted may vary according to each format.
  • PUCCH format 1a / 1b carries ACK / NACK.
  • PUCCH format 2 / 2a / 2b carries CQI or CQI and ACK / NACK.
  • PUCCH format 3 carries a plurality of ACK / NACKs. Table 1 shows a modulation scheme according to the PUCCH format and the number of bits per subframe.
  • PUCCH format Modulation scheme Number of bits per subframe One N / A N / A 1a BPSK One 1b QPSK 2 2 QPSK 20 2a QPSK + BPSK 21 2b QPSK + QPSK 22 3 QPSK 48
  • BPSK denotes modulation of binary phase shift keying method
  • QPSK denotes modulation of quadrature phase shift keying method
  • the physical resource for the PUCCH may be determined according to N RB 2 and N cs (1) given by a higher layer.
  • N RB (2) ( ⁇ 0) represents the number of resource blocks that can be used for PUCCH format 2 / 2a / 2b transmission in each slot.
  • N cs (1) is the number of cyclic shifts used for PUCCH format 1 / 1a / b in a resource block in which PUCCH format 1 / 1a / 1b and PUCCH format 2 / 2a / 2b are mixed. Indicates.
  • N cs (1) is an integer multiple of ⁇ shift PUCCH given by the higher layer.
  • N cs (1) 0, there is no resource block in which PUCCH format 1 / 1a / 1b and PUCCH format 2 / 2a / 2b are mixed.
  • Resources for transmission of the PUCCH format 1 / 1a / 1b and the PUCCH format 2 / 2a / 2b may be indicated by the PUCCH resource index n PUCCH (1) and n PUCCH (2) , respectively.
  • c 3 for normal CP, 2 for extended CP, and N sc RB is 12, which is the number of subcarriers included in one resource block.
  • n PUCCH (2) is a UE-specific parameter and may be determined by a higher layer.
  • n PUCCH (1) can be determined.
  • n PUCCH (2) may be included in the CQI-ReportConfig information elements (IEs) that specify the CQI reporting configuration.
  • the shift orthogonal sequence index and / or rotation is determined by the thus determined n PUCCH (1) and n PUCCH (2).
  • FIG. 7 shows an example in which a PUCCH format is mapped to a physical resource.
  • a resource block index m allocated to a physical region according to n PUCCH (1) and n PUCCH (2) is calculated for each terminal. That is, m is a location index indicating a logical frequency domain location of the resource block allocated to the PUCCH in the subframe.
  • There may be at most one resource block (m 2) supporting a mixture of PUCCH format 1 / 1a / 1b and PUCCH format 2 / 2a / 2b in each slot.
  • the PUCCH for one UE may be allocated as an RB pair in a subframe.
  • Resource blocks belonging to a resource block pair may occupy different subcarriers in each of the first slot and the second slot. That is, the frequency occupied by the resource block belonging to the resource block pair allocated to the PUCCH may be changed based on a slot boundary. This is called that the RB pair allocated to the PUCCH is frequency-hopped at the slot boundary.
  • the terminal may obtain a frequency diversity gain by transmitting uplink control information through different subcarriers over time.
  • N cs (1) 7.
  • the technology is evolving toward increasing the density of nodes that can be connected to a user.
  • performance may be further improved by cooperation between nodes.
  • FIG 9 shows an example of a multi-node system.
  • the multi-node system 20 may include one base station 21 and a plurality of nodes 25-1, 25-2, 25-3, 25-4, and 25-5. .
  • the plurality of nodes 25-1, 25-2, 25-3, 25-4, and 25-5 may be managed by one base station 21. That is, the plurality of nodes 25-1, 25-2, 25-3, 25-4, and 25-5 operate as part of one cell.
  • each node 25-1, 25-2, 25-3, 25-4, 25-5 may be assigned a separate node identifier or operate like some antenna group in a cell without a separate node ID. can do.
  • the multi-node system 20 of FIG. 9 may be viewed as a distributed antenna system (DAS) forming one cell.
  • DAS distributed antenna system
  • the plurality of nodes 25-1, 25-2, 25-3, 25-4, and 25-5 may perform scheduling and handover (HO) of the terminal with individual cell IDs.
  • the multi-node system 20 of FIG. 9 may be viewed as a multi-cell system.
  • the base station 21 may be a macro cell, and each node may be a femto cell or a pico cell having cell coverage smaller than the cell coverage of the macro cell.
  • a multi-tier network when a plurality of cells are overlayed and configured according to coverage, it may be referred to as a multi-tier network.
  • each node 25-1, 25-2, 25-3, 25-4, and 25-5 is a base station, a Node-B, an eNode-B, a pico cell eNb (PeNB), a home eNB (HeNB), It may be one of a remote radio head (RRH), a relay station (RS), and a distributed antenna. At least one antenna may be installed in one node. Nodes may also be called points.
  • a node refers to an antenna group spaced apart from the DAS by a predetermined interval or more. That is, in the following description, it may be assumed that each node physically means RRH. However, the present invention is not limited thereto, and a node may be defined as any antenna group regardless of physical intervals.
  • a base station composed of a plurality of cross polarized antennas is reported to be composed of a node composed of horizontal polarized antennas and a node composed of vertical polarized antennas. The present invention can be applied.
  • Control channels may be newly configured for efficient operation of a multi-node system.
  • the new PDCCH may be called an R-PDCCH, an E-PDCCH, or an RRH-PDCCH, and various methods have been proposed for its configuration.
  • PUCCH format 1 / 1a / 1b resource index n PUCCH (1) is determined based on the first CCE index of the allocated PDCCH region. Since the E-PDCCH cannot share the CCE with the existing PDCCH, the E-PDCCH is allocated. PUCCH format 1 / 1a / 1b resource index n PUCCH (1) cannot be determined based on the first CCE index.
  • the PUCCH format 1 / 1a / 1b resource index determined based on the existing PDCCH and the PUCCH format 1 / 1a / 1b resource index determined based on the E-PDCCH may collide.
  • the PUCCH format 2 / 2a / 2b resource index N PUCCH (2) and the number n RB (2) of resource blocks to which the PUCCH format 2 / 2a / 2b is allocated are determined by a higher layer, and the newly introduced E-PDCCH In order to increase the N RB (2) for the support of the existing LTE Rel-8 to Rel-10 terminal is difficult.
  • n PUCCH (1) may be calculated based on the first CCE index to which the E-PDCCH is allocated by adding the search space of the E-PDCCH to the end of the search space of the existing PDCCH. That is, the UE capable of reading the E-PDCCH may obtain the final PUCCH resource index n PUCCH (1) by adding the CCE index of the E-PDCCH after the existing PDCCH search space.
  • n PUCCH (1) may be calculated as in Equation 1.
  • n PUCCH (1) n CCE + N PUCCH (1) + N CCE
  • the PDCCHs of the existing Rel-8 to Rel-10 terminals are allocated to the existing PDCCH discovery space, and the E-PDCCH is allocated to the concatenated E-PDCCH discovery space behind the existing PDCCH discovery space.
  • the existing PDCCH search space does not overlap with the search space of the E-PDCCH, so that the existing PUCCH resource allocation method can be used as it is.
  • the E-PDCCH can detect and decode only the Rel-11 UE and additional operations are applied only to the Rel-11 UE, there is no effect on the existing UE. That is, backward compatibility is satisfied.
  • Equation N CCE is also known to both the base station and the terminal, no additional signaling is required.
  • the present invention uses a mixed region in which PUCCH format 1 / 1a / 1b and PUCCH format 2 / 2a / 2b are multiplexed at the same time in allocating PUCCH resources based on E-PDCCH in a multi-node system, or specify a predetermined region. Suggest to use
  • a method of using a mixed region in which PUCCH 1 / 1a / 1b and PUCCH format 2 / 2a / 2b are multiplexed simultaneously as a PUCCH resource for a Rel-11 UE will be described.
  • There exists an area that simultaneously supports PUCCH 1 / 1a / 1b and PUCCH format 2 / 2a / 2b among existing PUCCH resources. This may correspond to a resource block in which m 2 in FIG. 7.
  • N PUCCH (1) is set to 0, existing terminals recognize that there is no mixed region and do not use the mixed region.
  • the base station does not allocate PUCCH format 2 / 2a / 2b resources to the corresponding UEs in the corresponding mixed region. Since the PUCCH format 2 / 2a / 2b resource is determined by the base station and known to the terminal through RRC signaling, the PUCCH format 2 / 2a / 2b resource may not be allocated to existing terminals only by the operation of the base station. Accordingly, the base station allocates PUCCH format 2 / 2a / 2b resources to existing terminals within the range of N PUCCH (2) ⁇ N RB (2) .
  • N RB (2) 24
  • the base station may allocate or signal the PUCCH resource index to use the mixed region as the PUCCH resource for the terminal receiving the downlink control signal through the E-PDCCH.
  • the UEs can simultaneously transmit the PUCCH format 1 / 1a / 1b and the PUCCH format 2 / 2a / 2b using the mixed region.
  • PUCCHs of 12 UEs are multiplexed on the frequency axis through 12 cyclic shifts in one resource block.
  • the PUCCH format 1 / 1a / 1b may be multiplexed once more on the time axis through a spreading code for one cyclic shift.
  • the number of terminals multiplexed on the time axis with respect to one cyclic shift is three in the normal CP and two in the extended CP. Accordingly, it is necessary to determine the number of cyclic shifts allocated to terminals transmitting the PUCCH format 1 / 1a / 1b and terminals transmitting the PUCCH format 2 / 2a / 2b in the mixed region.
  • N CS, RRH (1) is the number of cyclic shifts used in PUCCH format 1 / 1a / 1b in one resource block
  • N CS, RRH (2) is in PUCCH format 1 / 1a / 1b in one resource block. Number of cyclic shifts used.
  • the range of n PUCCH (1) and n PUCCH (2) in the mixed region may be determined.
  • the N CS, RRH (1) and / or N CS, RRH (1) may be RRC signaled.
  • the range of the PUCCH format 1 / 1a / 1b resource index n PUCCH (1) allocated to terminals transmitting the PUCCH format 1 / 1a / 1b may satisfy Equation 2.
  • N RB (2) ⁇ n PUCCH (1) ⁇ N RB (2) + c N CS, RRH (1) or
  • N RB (2) ⁇ n PUCCH (1) ⁇ N RB (2) + c. (N sc RB -N CS, RRH (2) )
  • the range of PUCCH format 2 / 2a / 2b resource index n PUCCH (2) allocated to terminals transmitting the PUCCH format 2 / 2a / 2b may satisfy Equation 3.
  • n PUCCH (2) is the number of cyclic shifts used in one resource block.
  • the UE receiving the downlink control signal through the E-PDCCH may recognize that the UE is scheduled through the E-PDCCH, and the UE may also transmit the uplink control information for the PDSCH scheduled by the E-PDCCH. It may be recognized that the mixed area should be transmitted using the PUCCH resource. Meanwhile, among Rel-11 terminals, terminals transmitting uplink control information using PUCCH format 2 / 2a / 2b receive n PUCCH (2) by RRC signaling of a base station and based on this, the mixed region is used as a PUCCH resource. Get assigned. That is, PUCCH format 2 / 2a / 2b resources may be allocated in the same manner as the conventional method.
  • UEs that transmit uplink control information using PUCCH format 1 / 1a / 1b are allocated a PUCCH format 1 / 1a / 1b resource index based on the first CCE index of the corresponding PDCCH. Accordingly, there is a possibility that the PUCCH format 1 / 1a / 1b resource index allocated based on the existing PDCCH collides with the PUCCH format 1 / 1a / 1b resource index allocated based on the E-PDCCH. Accordingly, the Rel-11 terminal transmitting uplink control information using the PUCCH format 1 / 1a / 1b may be allocated a PUCCH format 1 / 1a / 1b resource based on n PUCCH (1) determined by Equation 4. have.
  • n PUCCH (1) (n CCE + N PUCCH (1) ) mod ( cN CS, RRH (1) ) + N RB (2) or
  • n PUCCH (1) (n CCE + N PUCCH (1) ) mod [c ⁇ (N sc RB -N CS, RRH (2) )] + N RB (2)
  • Equation 4 It can be seen from Equation 4 that n PUCCH (1) satisfies the range of Equation 2.
  • 11 shows an example of PUCCH resource allocation for a terminal.
  • the base station may preset an area used as a PUCCH resource and allocate a PUCCH resource in the corresponding area.
  • the corresponding region may be a specific resource block, and a range of the PUCCH format 1 / 1a / 1b resource index n PUCCH (1) and the PUCCH format 2 / 2a / 2b resource index n PUCCH (2) may also be specified in advance.
  • Existing PUCCH resource index allocation for application of cyclic shift and spreading codes used for multiplexing of a terminal transmitting PUCCH format 1 / 1a / 1b and a terminal transmitting PUCCH format 2 / 2a / 2b in a corresponding resource block The method can be used as is.
  • the resource block to which the PUCCH resource is allocated is not shared with existing LTE rel-8 to rel-10 terminals.
  • FIG. 13 shows an embodiment of a proposed method for transmitting uplink control information.
  • step S200 the terminal receives the downlink data from the base station through the PDSCH scheduled based on the E-PDCCH which is a control channel for the plurality of terminals in the multi-node system.
  • step S210 the terminal transmits uplink control information to the base station through the PUCCH resources allocated by the base station.
  • a mixed region in which PUCCH 1 / 1a / 1b and PUCCH format 2 / 2a / 2b are multiplexed simultaneously may be used as the PUCCH resource, or a base station may preset a region used as the PUCCH resource.
  • FIG. 14 is a block diagram of a wireless communication system in which an embodiment of the present invention is implemented.
  • the base station 800 includes a processor 810, a memory 820, and a radio frequency unit (RF) 830.
  • Processor 810 implements the proposed functions, processes, and / or methods. Layers of the air interface protocol may be implemented by the processor 810.
  • the memory 820 is connected to the processor 810 and stores various information for driving the processor 810.
  • the RF unit 830 is connected to the processor 810 to transmit and / or receive a radio signal.
  • the terminal 900 includes a processor 910, a memory 920, and an RF unit 930.
  • Processor 910 implements the proposed functions, processes, and / or methods. Layers of the air interface protocol may be implemented by the processor 910.
  • the memory 920 is connected to the processor 910 and stores various information for driving the processor 910.
  • the RF unit 930 is connected to the processor 910 to transmit and / or receive a radio signal.
  • Processors 810 and 910 may include application-specific integrated circuits (ASICs), other chipsets, logic circuits, and / or data processing devices.
  • the memory 820, 920 may include read-only memory (ROM), random access memory (RAM), flash memory, memory card, storage medium, and / or other storage device.
  • the RF unit 830 and 930 may include a baseband circuit for processing a radio signal.
  • the above-described technique may be implemented as a module (process, function, etc.) for performing the above-described function.
  • the module may be stored in the memory 820, 920 and executed by the processor 810, 910.
  • the memories 820 and 920 may be inside or outside the processors 810 and 910, and may be connected to the processors 810 and 910 by various well-known means.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention se rapporte à un procédé et à un appareil permettant de transmettre des informations de commande de liaison montante dans un système de communication sans fil. Un terminal reçoit d'une station de base des données de liaison descendante au moyen d'un canal physique partagé sur la liaison descendante (PDSCH, Physical Downlink Shared CHannel) programmé sur la base d'un canal physique perfectionné de contrôle sur la liaison descendante (E-PDCCH, Enhanced-Physical Downlink Control CHannel) qui est un canal de commande pour une pluralité de terminaux dans un système à nœuds multiples, et transmet les informations de commande de liaison montante à la station de base au moyen d'une ressource d'un canal physique de contrôle sur la liaison montante (PUCCH, Physical Uplink Control CHannel) allouée par la station de base.
PCT/KR2011/009061 2011-04-28 2011-11-25 Procédé et appareil permettant de transmettre des informations de commande de liaison montante dans un système de communication sans fil WO2012148060A1 (fr)

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CN103327639A (zh) * 2013-06-20 2013-09-25 吉林大学 Lte系统中利用pucch传输m2m业务的方法
WO2014073928A1 (fr) * 2012-11-09 2014-05-15 Samsung Electronics Co., Ltd. Procédé et appareil destinés à la transmission de données de liaison descendante
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WO2014073928A1 (fr) * 2012-11-09 2014-05-15 Samsung Electronics Co., Ltd. Procédé et appareil destinés à la transmission de données de liaison descendante
CN103327639A (zh) * 2013-06-20 2013-09-25 吉林大学 Lte系统中利用pucch传输m2m业务的方法
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CN108834106B (zh) * 2017-05-05 2023-05-23 中兴通讯股份有限公司 资源分配方法、装置及存储介质

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